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Cho MS, Lee SK, Kwon JH, Nam SW. Hepatobiliary and Pancreatic: Challenges in the diagnosis of hepatic nodules in patients with alcoholic liver cirrhosis. J Gastroenterol Hepatol 2023; 38:1867. [PMID: 37427538 DOI: 10.1111/jgh.16277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/11/2023]
Affiliation(s)
- M S Cho
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - S K Lee
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - J H Kwon
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - S W Nam
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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Oripov BG, Rampini DS, Allmaras J, Shaw MD, Nam SW, Korzh B, McCaughan AN. A superconducting nanowire single-photon camera with 400,000 pixels. Nature 2023; 622:730-734. [PMID: 37880435 DOI: 10.1038/s41586-023-06550-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Accepted: 08/17/2023] [Indexed: 10/27/2023]
Abstract
For the past 50 years, superconducting detectors have offered exceptional sensitivity and speed for detecting faint electromagnetic signals in a wide range of applications. These detectors operate at very low temperatures and generate a minimum of excess noise, making them ideal for testing the non-local nature of reality1,2, investigating dark matter3,4, mapping the early universe5-7 and performing quantum computation8-10 and communication11-14. Despite their appealing properties, however, there are at present no large-scale superconducting cameras-even the largest demonstrations have never exceeded 20,000 pixels15. This is especially true for superconducting nanowire single-photon detectors (SNSPDs)16-18. These detectors have been demonstrated with system detection efficiencies of 98.0% (ref. 19), sub-3-ps timing jitter20, sensitivity from the ultraviolet21 to the mid-infrared22 and microhertz dark-count rates3, but have never achieved an array size larger than a kilopixel23,24. Here we report on the development of a 400,000-pixel SNSPD camera, a factor of 400 improvement over the state of the art. The array spanned an area of 4 × 2.5 mm with 5 × 5-μm resolution, reached unity quantum efficiency at wavelengths of 370 nm and 635 nm, counted at a rate of 1.1 × 105 counts per second (cps) and had a dark-count rate of 1.0 × 10-4 cps per detector (corresponding to 0.13 cps over the whole array). The imaging area contains no ancillary circuitry and the architecture is scalable well beyond the present demonstration, paving the way for large-format superconducting cameras with near-unity detection efficiencies across a wide range of the electromagnetic spectrum.
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Affiliation(s)
- B G Oripov
- National Institute of Standards and Technology, Boulder, CO, USA.
- Department of Physics, University of Colorado Boulder, Boulder, CO, USA.
| | - D S Rampini
- National Institute of Standards and Technology, Boulder, CO, USA
- Department of Physics, University of Colorado Boulder, Boulder, CO, USA
| | - J Allmaras
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA
| | - M D Shaw
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA
| | - S W Nam
- National Institute of Standards and Technology, Boulder, CO, USA
| | - B Korzh
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA
| | - A N McCaughan
- National Institute of Standards and Technology, Boulder, CO, USA
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3
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Song YJ, Nam SW, Suh CH, Choe JY, Yoo DH. Biosimilars in the treatment of rheumatoid arthritis: a pharmacokinetic overview. Expert Opin Drug Metab Toxicol 2023; 19:751-768. [PMID: 37842948 DOI: 10.1080/17425255.2023.2270407] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 10/10/2023] [Indexed: 10/17/2023]
Abstract
INTRODUCTION As of May 2023, 19 and 18 biosimilars have been approved for the treatment of rheumatoid arthritis (RA) by the European Medicines Agency (EMA) and United States Food and Drug Administration (US FDA) respectively. AREA COVERED Pharmacokinetic results of phase 1 studies of approved biosimilars were reviewed by systematic literature search. The impact of immunogenicity on the pharmacokinetic data and clinical response was assessed, and the potential benefit of monitoring serum concentrations of biologic drugs is discussed. The advantage of subcutaneous CT-P13 (an infliximab biosimilar) in clinical practice is reviewed. EXPERT OPINION Biosimilars are approved based on the totality of evidence including comparable physiochemical properties, PK / PD profiles, and clinical efficacy and safety to the originator. To utilize biosimilars more effectively, physicians should be aware of the utility of combination DMARD therapy to reduce immunogenicity and maintain efficacy and PK profile. PK monitoring, however, is not currently recommended in clinical practice. CT-P13 subcutaneous (SC) is the first SC infliximab used for treatment of RA patients. Based on data from clinical studies and the real world, SC-infliximab is an attractive therapeutic option compared to IV formulations of infliximab based on its efficacy, pharmacokinetics, patient-reported outcomes, and safety profile.
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Affiliation(s)
- Yeo-Jin Song
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Republic of Korea
- Hanyang University Institute of Rheumatologic Research, Seoul, Republic of Korea
| | - Seoung Wan Nam
- Department of Rheumatology, Wonju Severance Christian Hospital, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
| | - Chang Hee Suh
- Department of Rheumatology, Ajou University School of Medicine, Suwon, Republic of Korea
| | - Jung Yoon Choe
- Department of Rheumatology, Daegu Catholic University Medical Center, Daegu, Republic of Korea
| | - Dae Hyun Yoo
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Republic of Korea
- Hanyang University Institute of Rheumatologic Research, Seoul, Republic of Korea
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Shin JI, Li H, Park S, Yang JW, Lee KH, Jo Y, Park S, Oh J, Kim H, An HJ, Jeong G, Jung H, Lee HJ, Kim JS, Nam SW, Koyanagi A, Jacob L, Hwang J, Yon DK, Lee SW, Tizaoui K, Kronbichler A, Kim JH, Smith L. Induction and Maintenance Treatment of Lupus Nephritis: A Comprehensive Review of Meta-Analyses. J Clin Med 2022; 11:jcm11020343. [PMID: 35054037 PMCID: PMC8780781 DOI: 10.3390/jcm11020343] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 12/16/2021] [Accepted: 12/18/2021] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Lupus nephritis (LN) is present in over 50% of patients with systemic lupus erythematosus (SLE) which is managed with immunosuppressive and immunomodulatory therapies. However, several novel therapeutic approaches for LN are under investigation due to the adverse effects spectrum of conventional therapy; Methods: We performed a comprehensive review of meta-analyses aggregating the comparative efficacies of various pharmacotherapies for LN. We conducted a literature search and retrieved a total of 23 meta-analyses and network meta-analyses for summarization. Pharmacotherapies were evaluated across six major outcomes: remission, relapse, mortality, end stage kidney disease (ESKD) progression, infection, and malignancy. RESULT Calcineurin inhibitors (CNI), particularly tacrolimus (TAC), in combination with glucocorticoids (GC) outperformed cyclophosphamide (CPA) with GC in the rate of remission, either complete or partial remission, and in terms of infectious complications. In maintenance therapy, MMF was superior to azathioprine (AZA) as the MMF-treated patients had lower relapse rate. INTERPRETATION This review aggregates evidence of therapy for clinicians and sheds light on comparative efficacies of alternative LN treatments. As more promising agents are entering the market, such as voclosporin, belimumab, and obinutuzumab, LN management might undergo significant changes during the next years.
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Affiliation(s)
- Jae Il Shin
- Department of Pediatrics, Yonsei University College of Medicine, Seoul 03722, Korea; (J.I.S.); (K.H.L.)
| | - Han Li
- University of Florida College of Medicine, Gainesville, FL 32610, USA;
| | - Seoyeon Park
- Yonsei University College of Medicine, Seoul 03722, Korea; (S.P.); (Y.J.); (S.P.); (J.O.); (H.K.); (H.J.A.)
| | - Jae Won Yang
- Department of Nephrology, Yonsei University Wonju College of Medicine, Wonju 26426, Korea; (J.W.Y.); (J.S.K.)
| | - Keum Hwa Lee
- Department of Pediatrics, Yonsei University College of Medicine, Seoul 03722, Korea; (J.I.S.); (K.H.L.)
| | - Yongsuk Jo
- Yonsei University College of Medicine, Seoul 03722, Korea; (S.P.); (Y.J.); (S.P.); (J.O.); (H.K.); (H.J.A.)
| | - Seongeun Park
- Yonsei University College of Medicine, Seoul 03722, Korea; (S.P.); (Y.J.); (S.P.); (J.O.); (H.K.); (H.J.A.)
| | - Jungmin Oh
- Yonsei University College of Medicine, Seoul 03722, Korea; (S.P.); (Y.J.); (S.P.); (J.O.); (H.K.); (H.J.A.)
| | - Hansol Kim
- Yonsei University College of Medicine, Seoul 03722, Korea; (S.P.); (Y.J.); (S.P.); (J.O.); (H.K.); (H.J.A.)
| | - Hyo Jin An
- Yonsei University College of Medicine, Seoul 03722, Korea; (S.P.); (Y.J.); (S.P.); (J.O.); (H.K.); (H.J.A.)
| | - Gahee Jeong
- Ewha Womans University College of Medicine, Seoul 07804, Korea; (G.J.); (H.J.); (H.J.L.)
| | - Haerang Jung
- Ewha Womans University College of Medicine, Seoul 07804, Korea; (G.J.); (H.J.); (H.J.L.)
| | - Hyun Jung Lee
- Ewha Womans University College of Medicine, Seoul 07804, Korea; (G.J.); (H.J.); (H.J.L.)
| | - Jae Seok Kim
- Department of Nephrology, Yonsei University Wonju College of Medicine, Wonju 26426, Korea; (J.W.Y.); (J.S.K.)
| | - Seoung Wan Nam
- Department of Rheumatology, Yonsei University Wonju College of Medicine, Wonju 26426, Korea;
| | - Ai Koyanagi
- Research and Development Unit, Parc Sanitari Sant Joan de Deu, Sant Boi de Llobregat, 08830 Barcelona, Spain; (A.K.); (L.J.)
- Catalan Institution for Research and Advanced Studies, Pg. Lluis Companys 23, 08010 Barcelona, Spain
- Centro de Investigación Biomédica en Red de Salud Mental, 78019 Madrid, Spain
| | - Louis Jacob
- Research and Development Unit, Parc Sanitari Sant Joan de Deu, Sant Boi de Llobregat, 08830 Barcelona, Spain; (A.K.); (L.J.)
- Centro de Investigación Biomédica en Red de Salud Mental, 78019 Madrid, Spain
- Faculty of Medicine, University of Versailles Saint-Quentin-en-Yvelines, 78000 Montigny-le-Bretonneux, France
| | - Jimin Hwang
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA;
| | - Dong Keon Yon
- Medical Science Research Institute, Kyung Hee University College of Medicine, Seoul 02447, Korea;
| | - Seung-Won Lee
- Department of Data Science, Sejong University College of Software Convergence, Sungkyunkwan University School of Medicine, Seoul 05006, Korea;
| | - Kalthoum Tizaoui
- Laboratory of Microorganisms and Active Biomolecules, Sciences Faculty of Tunis, University Tunis El Manar, Tunis 1068, Tunisia;
| | | | - Ji Hong Kim
- Department of Pediatrics, Yonsei University College of Medicine, Seoul 03722, Korea; (J.I.S.); (K.H.L.)
- Department of Pediatrics, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul 26426, Korea
- Correspondence:
| | - Lee Smith
- Centre for Health, Performance, and Wellbeing, Anglia Ruskin University, Cambridge CB1 1PT, UK;
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Nam SW, Sung YK, Kim D, Cho SK, Song Y, Choi YY, Sim Y, Kim TH. The usefulness of trabecular bone score in patients with ankylosing spondylitis. Korean J Intern Med 2021; 36:1211-1220. [PMID: 32599681 PMCID: PMC8435513 DOI: 10.3904/kjim.2020.065] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 04/27/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUNDS/AIMS This study was performed to reveal the usefulness of the trabecular bone score (TBS) in assessing bone strength in patients with ankylosing spondylitis (AS) in comparison with dual-energy X-ray absorptiometry (DXA) methods. METHODS A total of 215 AS patients (75.8% male) were enrolled from a single university hospital in Korea. Demographic and clinical information were assessed. Patients completed X-rays of the cervical and lumbar spine (L-spine), and spinal ankyloses were quantified using the modified Stoke AS Spine Score (mSASSS). Hip, anteroposterior and lateral L-spine bone mineral density (BMD) and TBS were assessed by DXA methods. Clinical characteristics and bone strength measurement results were compared between male and female AS patients. The accuracy of each bone strength evaluation method in predicting Fracture Risk Assessment Tool (FRAX) scores indicating moderate or higher fracture risk was compared by receiver operating characteristic curves in patients aged ≥ 40 years. Correlations between each bone strength measurement method and mSASSS were examined. RESULTS Male patients showed higher mSASSS and less prevalent peripheral joint involvement compared to female patients (p < 0.05). TBS, hip BMD, and L-spine lateral BMD showed comparably high areas under the curve (AUCs) for predicting FRAX-major osteoporotic fractures (MOF) ≥ 10% (AUC ranged 0.72 to 0.76). TBS negatively correlated with mSASSS in both male and female patients (p < 0.01). CONCLUSION TBS could predict the risk of MOF and is not influenced by spinal osteoproliferation in AS patients, even in those with advanced spinal changes.
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Affiliation(s)
- Seoung Wan Nam
- Department of Rheumatology, Wonju Severance Christian Hospital, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Yoon-Kyoung Sung
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Korea
| | - Dam Kim
- Division of Rheumatology, Department of Internal Medicine, Myongji Hospital, Hanyang University College of Medicine, Goyang, Korea
| | - Soo-Kyung Cho
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Korea
| | - Yoonah Song
- Department of Radiology, Kok Hospital, Seongnam, Korea
| | - Yun Young Choi
- Department of Nuclear Medicine, Hanyang University Medical Center, Seoul, Korea
| | - Yongjin Sim
- Department of Information Statistics, Yonsei University Mirae Campus, Wonju, Korea
| | - Tae-Hwan Kim
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Korea
- Correspondence to Tae-Hwan Kim, M.D. Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea Tel: +82-2-2290-9245 Fax: +82-2-2298-8231 E-mail:
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Nam SW, Lee KS, Yang JW, Ko Y, Eisenhut M, Lee KH, Shin JI, Kronbichler A. Understanding the genetics of systemic lupus erythematosus using Bayesian statistics and gene network analysis. Clin Exp Pediatr 2021; 64:208-222. [PMID: 32683804 PMCID: PMC8103040 DOI: 10.3345/cep.2020.00633] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Accepted: 06/23/2020] [Indexed: 02/07/2023] Open
Abstract
The publication of genetic epidemiology meta-analyses has increased rapidly, but it has been suggested that many of the statistically significant results are false positive. In addition, most such meta-analyses have been redundant, duplicate, and erroneous, leading to research waste. In addition, since most claimed candidate gene associations were false-positives, correctly interpreting the published results is important. In this review, we emphasize the importance of interpreting the results of genetic epidemiology meta-analyses using Bayesian statistics and gene network analysis, which could be applied in other diseases.
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Affiliation(s)
- Seoung Wan Nam
- Department of Rheumatology, Wonju Severance Christian Hospital, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Kwang Seob Lee
- Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Jae Won Yang
- Department of Nephrology, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Younhee Ko
- Division of Biomedical Engineering, Hankuk University of Foreign Studies, Yongin, Korea
| | - Michael Eisenhut
- Department of Pediatrics, Luton & Dunstable University Hospital NHS Foundation Trust, Luton, UK
| | - Keum Hwa Lee
- Department of Pediatrics, Yonsei University College of Medicine, Seoul, Korea.,Division of Pediatric Nephrology, Severance Children's Hospital, Seoul, Korea.,Institute of Kidney Disease Research, Yonsei University College of Medicine, Seoul, Korea
| | - Jae Il Shin
- Department of Pediatrics, Yonsei University College of Medicine, Seoul, Korea.,Division of Pediatric Nephrology, Severance Children's Hospital, Seoul, Korea.,Institute of Kidney Disease Research, Yonsei University College of Medicine, Seoul, Korea
| | - Andreas Kronbichler
- Department of Internal Medicine IV (Nephrology and Hypertension), Medical University Innsbruck, Innsbruck, Austria
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Arrazola JM, Bergholm V, Brádler K, Bromley TR, Collins MJ, Dhand I, Fumagalli A, Gerrits T, Goussev A, Helt LG, Hundal J, Isacsson T, Israel RB, Izaac J, Jahangiri S, Janik R, Killoran N, Kumar SP, Lavoie J, Lita AE, Mahler DH, Menotti M, Morrison B, Nam SW, Neuhaus L, Qi HY, Quesada N, Repingon A, Sabapathy KK, Schuld M, Su D, Swinarton J, Száva A, Tan K, Tan P, Vaidya VD, Vernon Z, Zabaneh Z, Zhang Y. Quantum circuits with many photons on a programmable nanophotonic chip. Nature 2021; 591:54-60. [PMID: 33658692 PMCID: PMC11008968 DOI: 10.1038/s41586-021-03202-1] [Citation(s) in RCA: 68] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Accepted: 01/04/2021] [Indexed: 01/31/2023]
Abstract
Growing interest in quantum computing for practical applications has led to a surge in the availability of programmable machines for executing quantum algorithms1,2. Present-day photonic quantum computers3-7 have been limited either to non-deterministic operation, low photon numbers and rates, or fixed random gate sequences. Here we introduce a full-stack hardware-software system for executing many-photon quantum circuit operations using integrated nanophotonics: a programmable chip, operating at room temperature and interfaced with a fully automated control system. The system enables remote users to execute quantum algorithms that require up to eight modes of strongly squeezed vacuum initialized as two-mode squeezed states in single temporal modes, a fully general and programmable four-mode interferometer, and photon number-resolving readout on all outputs. Detection of multi-photon events with photon numbers and rates exceeding any previous programmable quantum optical demonstration is made possible by strong squeezing and high sampling rates. We verify the non-classicality of the device output, and use the platform to carry out proof-of-principle demonstrations of three quantum algorithms: Gaussian boson sampling, molecular vibronic spectra and graph similarity8. These demonstrations validate the platform as a launchpad for scaling photonic technologies for quantum information processing.
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Affiliation(s)
| | | | | | | | | | - I Dhand
- Xanadu, Toronto, Ontario, Canada
| | | | - T Gerrits
- National Institute of Standards and Technology, Boulder, CO, USA
| | | | - L G Helt
- Xanadu, Toronto, Ontario, Canada
| | - J Hundal
- Xanadu, Toronto, Ontario, Canada
| | | | | | - J Izaac
- Xanadu, Toronto, Ontario, Canada
| | | | - R Janik
- Xanadu, Toronto, Ontario, Canada
| | | | | | - J Lavoie
- Xanadu, Toronto, Ontario, Canada
| | - A E Lita
- National Institute of Standards and Technology, Boulder, CO, USA
| | | | | | | | - S W Nam
- National Institute of Standards and Technology, Boulder, CO, USA
| | | | - H Y Qi
- Xanadu, Toronto, Ontario, Canada
| | | | | | | | - M Schuld
- Xanadu, Toronto, Ontario, Canada
| | - D Su
- Xanadu, Toronto, Ontario, Canada
| | | | - A Száva
- Xanadu, Toronto, Ontario, Canada
| | - K Tan
- Xanadu, Toronto, Ontario, Canada
| | - P Tan
- Xanadu, Toronto, Ontario, Canada
| | | | - Z Vernon
- Xanadu, Toronto, Ontario, Canada.
| | | | - Y Zhang
- Xanadu, Toronto, Ontario, Canada
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8
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Todaro SL, Verma VB, McCormick KC, Allcock DTC, Mirin RP, Wineland DJ, Nam SW, Wilson AC, Leibfried D, Slichter DH. State Readout of a Trapped Ion Qubit Using a Trap-Integrated Superconducting Photon Detector. Phys Rev Lett 2021; 126:010501. [PMID: 33480763 DOI: 10.1103/physrevlett.126.010501] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 11/11/2020] [Indexed: 06/12/2023]
Abstract
We report high-fidelity state readout of a trapped ion qubit using a trap-integrated photon detector. We determine the hyperfine qubit state of a single ^{9}Be^{+} ion held in a surface-electrode rf ion trap by counting state-dependent ion fluorescence photons with a superconducting nanowire single-photon detector fabricated into the trap structure. The average readout fidelity is 0.9991(1), with a mean readout duration of 46 μs, and is limited by the polarization impurity of the readout laser beam and by off-resonant optical pumping. Because there are no intervening optical elements between the ion and the detector, we can use the ion fluorescence as a self-calibrated photon source to determine the detector quantum efficiency and its dependence on photon incidence angle and polarization.
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Affiliation(s)
- S L Todaro
- Time and Frequency Division, National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
- Department of Physics, University of Colorado, Boulder, Colorado 80309, USA
| | - V B Verma
- Applied Physics Division, National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - K C McCormick
- Time and Frequency Division, National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
- Department of Physics, University of Colorado, Boulder, Colorado 80309, USA
| | - D T C Allcock
- Time and Frequency Division, National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
- Department of Physics, University of Colorado, Boulder, Colorado 80309, USA
- Department of Physics, University of Oregon, Eugene, Oregon 97403, USA
| | - R P Mirin
- Applied Physics Division, National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - D J Wineland
- Time and Frequency Division, National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
- Department of Physics, University of Colorado, Boulder, Colorado 80309, USA
- Department of Physics, University of Oregon, Eugene, Oregon 97403, USA
| | - S W Nam
- Applied Physics Division, National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - A C Wilson
- Time and Frequency Division, National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - D Leibfried
- Time and Frequency Division, National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - D H Slichter
- Time and Frequency Division, National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
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Han YJ, Lee KH, Yoon S, Nam SW, Ryu S, Seong D, Kim JS, Lee JY, Yang JW, Lee J, Koyanagi A, Hong SH, Dragioti E, Radua J, Smith L, Oh H, Ghayda RA, Kronbichler A, Effenberger M, Kresse D, Denicolò S, Kang W, Jacob L, Shin H, Shin JI. Treatment of severe acute respiratory syndrome (SARS), Middle East respiratory syndrome (MERS), and coronavirus disease 2019 (COVID-19): a systematic review of in vitro, in vivo, and clinical trials. Am J Cancer Res 2021; 11:1207-1231. [PMID: 33391531 PMCID: PMC7738873 DOI: 10.7150/thno.48342] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 10/22/2020] [Indexed: 02/06/2023] Open
Abstract
Rationale: Coronavirus disease 2019 (COVID-19) has spread worldwide and poses a threat to humanity. However, no specific therapy has been established for this disease yet. We conducted a systematic review to highlight therapeutic agents that might be effective in treating COVID-19. Methods: We searched Medline, Medrxiv.org, and reference lists of relevant publications to identify articles of in vitro, in vivo, and clinical studies on treatments for severe acute respiratory syndrome (SARS), Middle East respiratory syndrome (MERS), and COVID-19 published in English until the last update on October 11, 2020. Results: We included 36 studies on SARS, 30 studies on MERS, and 10 meta-analyses on SARS and MERS in this study. Through 12,200 title and 830 full-text screenings for COVID-19, eight in vitro studies, 46 randomized controlled trials (RCTs) on 6,886 patients, and 29 meta-analyses were obtained and investigated. There was no therapeutic agent that consistently resulted in positive outcomes across SARS, MERS, and COVID-19. Remdesivir showed a therapeutic effect for COVID-19 in two RCTs involving the largest number of total participants (n = 1,461). Other therapies that showed an effect in at least two RCTs for COVID-19 were sofosbuvir/daclatasvir (n = 114), colchicine (n = 140), IFN-β1b (n = 193), and convalescent plasma therapy (n = 126). Conclusions: This review provides information to help establish treatment and research directions for COVID-19 based on currently available evidence. Further RCTs are required.
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Affiliation(s)
- Young Joo Han
- Department of Pediatrics, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Republic of Korea
| | - Keum Hwa Lee
- Department of Pediatrics, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Sojung Yoon
- Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Seoung Wan Nam
- Department of Rheumatology, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
| | - Seohyun Ryu
- Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Dawon Seong
- Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Jae Seok Kim
- Department of Nephrology, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
| | - Jun Young Lee
- Department of Nephrology, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
| | - Jae Won Yang
- Department of Nephrology, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
| | - Jinhee Lee
- Department of Psychiatry, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
| | - Ai Koyanagi
- Research and development unit, Parc Sanitari Sant Joan de Déu/CIBERSAM, Universitat de Barcelona, Fundació Sant Joan de Déu, Sant Boi de Llobregat, Barcelona, Spain.,ICREA, Pg. Lluis Companys 23, 08010, Barcelona, Spain
| | - Sung Hwi Hong
- Department of Global Health and Population, Harvard T.H. Chan School of Public Health, 677 Huntington Avenue, Boston, USA
| | - Elena Dragioti
- Pain and Rehabilitation Centre, and Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden
| | - Joaquim Radua
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) and Mental Health Research Networking Center (CIBERSAM), Barcelona, Spain.,Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK.,Centre for Psychiatric Research, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Lee Smith
- The Cambridge Centre for Sport and Exercise Sciences, Anglia Ruskin University, Cambridge, UK
| | - Hans Oh
- School of Social Work, University of Southern California, CA, USA
| | - Ramy Abou Ghayda
- Department of Global Health and Population, Harvard T.H. Chan School of Public Health, 677 Huntington Avenue, Boston, USA.,Division of Urology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Andreas Kronbichler
- Department of Internal Medicine IV (Nephrology and Hypertension), Medical University Innsbruck, Innsbruck, Austria
| | - Maria Effenberger
- Department of Internal Medicine I (Gastroenterology, Hepatology, Endocrinology & Metabolism), Medical University Innsbruck, Innsbruck, Austria
| | - Daniela Kresse
- Department of Internal Medicine, St. Johann County Hospital, St. Johann in Tirol, Austria
| | - Sara Denicolò
- Department of Internal Medicine IV (Nephrology and Hypertension), Medical University Innsbruck, Innsbruck, Austria
| | - Woosun Kang
- Department of Internal Medicine, University of Illinois College of Medicine at Peoria, Peoria, IL, USA
| | - Louis Jacob
- Research and development unit, Parc Sanitari Sant Joan de Déu/CIBERSAM, Universitat de Barcelona, Fundació Sant Joan de Déu, Sant Boi de Llobregat, Barcelona, Spain.,Faculty of Medicine, University of Versailles Saint-Quentin-en-Yvelines, Montigny-le-Bretonneux, France
| | - Hanwul Shin
- Department of Nephrology, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
| | - Jae Il Shin
- Department of Pediatrics, Yonsei University College of Medicine, Seoul, Republic of Korea.,✉ Corresponding author: Dr. Jae Il Shin MD PhD, 50-1 Yonsei-ro, Seodaemun-gu, Department of Pediatrics, Yonsei University College of Medicine, Seoul 03722, Republic of Korea. Tel: 82-2-2228-2050, Fax: 82-2-393-9118, E-mail:
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10
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Vaidya VD, Morrison B, Helt LG, Shahrokshahi R, Mahler DH, Collins MJ, Tan K, Lavoie J, Repingon A, Menotti M, Quesada N, Pooser RC, Lita AE, Gerrits T, Nam SW, Vernon Z. Broadband quadrature-squeezed vacuum and nonclassical photon number correlations from a nanophotonic device. Sci Adv 2020; 6:6/39/eaba9186. [PMID: 32967824 PMCID: PMC7531882 DOI: 10.1126/sciadv.aba9186] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 08/06/2020] [Indexed: 05/27/2023]
Abstract
We report demonstrations of both quadrature-squeezed vacuum and photon number difference squeezing generated in an integrated nanophotonic device. Squeezed light is generated via strongly driven spontaneous four-wave mixing below threshold in silicon nitride microring resonators. The generated light is characterized with both homodyne detection and direct measurements of photon statistics using photon number-resolving transition-edge sensors. We measure 1.0(1) decibels of broadband quadrature squeezing (~4 decibels inferred on-chip) and 1.5(3) decibels of photon number difference squeezing (~7 decibels inferred on-chip). Nearly single temporal mode operation is achieved, with measured raw unheralded second-order correlations g (2) as high as 1.95(1). Multiphoton events of over 10 photons are directly detected with rates exceeding any previous quantum optical demonstration using integrated nanophotonics. These results will have an enabling impact on scaling continuous variable quantum technology.
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Affiliation(s)
| | | | - L G Helt
- Xanadu, Toronto, ON M5G 2C8, Canada
| | | | | | | | - K Tan
- Xanadu, Toronto, ON M5G 2C8, Canada
| | - J Lavoie
- Xanadu, Toronto, ON M5G 2C8, Canada
| | | | | | | | - R C Pooser
- Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - A E Lita
- National Institute of Standards and Technology (NIST), 325 Broadway, Boulder, CO 80305, USA
| | - T Gerrits
- National Institute of Standards and Technology (NIST), 325 Broadway, Boulder, CO 80305, USA
| | - S W Nam
- National Institute of Standards and Technology (NIST), 325 Broadway, Boulder, CO 80305, USA
| | - Z Vernon
- Xanadu, Toronto, ON M5G 2C8, Canada.
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11
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An HJ, Tizaoui K, Terrazzino S, Cargnin S, Lee KH, Nam SW, Kim JS, Yang JW, Lee JY, Smith L, Koyanagi A, Jacob L, Li H, Shin JI, Kronbichler A. Sarcopenia in Autoimmune and Rheumatic Diseases: A Comprehensive Review. Int J Mol Sci 2020; 21:ijms21165678. [PMID: 32784808 PMCID: PMC7461030 DOI: 10.3390/ijms21165678] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 08/02/2020] [Accepted: 08/03/2020] [Indexed: 12/15/2022] Open
Abstract
Sarcopenia refers to a decrease in skeletal muscle mass and function. Because sarcopenia affects mortality, and causes significant disability, the clinical importance of sarcopenia is emerging. At first, sarcopenia was recognized as an age-related disease but, recently, it has been reported to be prevalent also in younger patients with autoimmune diseases. Specifically, the association of sarcopenia and autoimmune diseases such as rheumatoid arthritis has been studied in detail. Although the pathogenesis of sarcopenia in autoimmune diseases has not been elucidated, chronic inflammation is believed to contribute to sarcopenia, and moreover the pathogenesis seems to be different depending on the respective underlying disease. The definition of sarcopenia differs among studies, which limits direct comparisons. Therefore, in this review, we cover various definitions of sarcopenia used in previous studies and highlight the prevalence of sarcopenia in diverse autoimmune diseases including rheumatoid arthritis, spondyloarthritis, systemic sclerosis, inflammatory bowel disease, and autoimmune diabetes. In addition, we cover the pathogenesis and treatment of sarcopenia in autoimmune and rheumatic diseases. This review provides a comprehensive understanding of sarcopenia in various autoimmune diseases and highlights the need for a consistent definition of sarcopenia.
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Affiliation(s)
- Hyo Jin An
- Yonsei University College of Medicine, Seoul 03722, Korea;
| | - Kalthoum Tizaoui
- Laboratory Microorganismes and Active Biomolecules, Sciences Faculty of Tunis, University Tunis El Manar, Tunis 2092, Tunisia;
| | - Salvatore Terrazzino
- Department of Pharmaceutical Sciences and Interdepartmental Research Center of Pharmacogenetics and Pharmacogenomics (CRIFF), University of Piemonte Orientale, 28100 Novara, Italy; (S.T.); (S.C.)
| | - Sarah Cargnin
- Department of Pharmaceutical Sciences and Interdepartmental Research Center of Pharmacogenetics and Pharmacogenomics (CRIFF), University of Piemonte Orientale, 28100 Novara, Italy; (S.T.); (S.C.)
| | - Keum Hwa Lee
- Department of Pediatrics, Yonsei University College of Medicine, Seoul 03722, Korea;
| | - Seoung Wan Nam
- Department of Rheumatology, Wonju Severance Christian Hospital, Yonsei University Wonju College of Medicine, Wonju 26426, Korea;
| | - Jae Seok Kim
- Department of Nephrology, Yonsei University Wonju College of Medicine, Wonju 26426, Korea; (J.S.K.); (J.W.Y.); (J.Y.L.)
| | - Jae Won Yang
- Department of Nephrology, Yonsei University Wonju College of Medicine, Wonju 26426, Korea; (J.S.K.); (J.W.Y.); (J.Y.L.)
| | - Jun Young Lee
- Department of Nephrology, Yonsei University Wonju College of Medicine, Wonju 26426, Korea; (J.S.K.); (J.W.Y.); (J.Y.L.)
| | - Lee Smith
- The Cambridge Centre for Sport and Exercise Science, Anglia Ruskin University, Cambridge CB1 1PT, UK;
| | - Ai Koyanagi
- Research and Development Unit, Parc Sanitari Sant Joan de Déu, CIBERSAM, 08830 Barcelona, Spain; (A.K.); (L.J.)
- ICREA, Pg. Lluis Companys 23, 08010 Barcelona, Spain
| | - Louis Jacob
- Research and Development Unit, Parc Sanitari Sant Joan de Déu, CIBERSAM, 08830 Barcelona, Spain; (A.K.); (L.J.)
- Faculty of Medicine, University of Versailles Saint-Quentin-en-Yvelines, 78000 Versailles, France
| | - Han Li
- University of Florida College of Medicine, Gainesville, FL 32610, USA;
| | - Jae Il Shin
- Department of Pediatrics, Yonsei University College of Medicine, Seoul 03722, Korea;
- Correspondence: ; Tel.: +82-2-22282-050
| | - Andreas Kronbichler
- Department of Internal Medicine IV (Nephrology and Hypertension), Medical University Innsbruck, 6020 Innsbruck, Austria;
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12
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Sperling J, Phillips DS, Bulmer JFF, Thekkadath GS, Eckstein A, Wolterink TAW, Lugani J, Nam SW, Lita A, Gerrits T, Vogel W, Agarwal GS, Silberhorn C, Walmsley IA. Detector-Agnostic Phase-Space Distributions. Phys Rev Lett 2020; 124:013605. [PMID: 31976720 DOI: 10.1103/physrevlett.124.013605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Indexed: 06/10/2023]
Abstract
The representation of quantum states via phase-space functions constitutes an intuitive technique to characterize light. However, the reconstruction of such distributions is challenging as it demands specific types of detectors and detailed models thereof to account for their particular properties and imperfections. To overcome these obstacles, we derive and implement a measurement scheme that enables a reconstruction of phase-space distributions for arbitrary states whose functionality does not depend on the knowledge of the detectors, thus defining the notion of detector-agnostic phase-space distributions. Our theory presents a generalization of well-known phase-space quasiprobability distributions, such as the Wigner function. We implement our measurement protocol, using state-of-the-art transition-edge sensors without performing a detector characterization. Based on our approach, we reveal the characteristic features of heralded single- and two-photon states in phase space and certify their nonclassicality with high statistical significance.
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Affiliation(s)
- J Sperling
- Integrated Quantum Optics Group, Applied Physics, University of Paderborn, 33098 Paderborn, Germany
| | - D S Phillips
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
| | - J F F Bulmer
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
| | - G S Thekkadath
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
| | - A Eckstein
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
| | - T A W Wolterink
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
| | - J Lugani
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
| | - S W Nam
- National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - A Lita
- National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - T Gerrits
- National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - W Vogel
- Institut für Physik, Universität Rostock, Albert-Einstein-Straße 23, D-18059 Rostock, Germany
| | - G S Agarwal
- Texas A&M University, College Station, Texas 77845, USA
| | - C Silberhorn
- Integrated Quantum Optics Group, Applied Physics, University of Paderborn, 33098 Paderborn, Germany
| | - I A Walmsley
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
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13
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McCaughan AN, Gammell JI, Oh DM, Nam SW. A high-density customizable microwave vacuum feedthrough for cryogenic applications. Rev Sci Instrum 2020; 91:015114. [PMID: 32012540 DOI: 10.1063/1.5133055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 01/04/2020] [Indexed: 06/10/2023]
Abstract
We have designed, constructed, and tested an electrical vacuum feedthrough that can carry a large number of microwave signal lines, has high vacuum compatibility, and is highly customizable. We found that it had a leak rate of approximately 10-7 Pa L/s (7.5 × 10-9 torr L/s), making it suitable for high-vacuum systems such as cryostats. The feedthrough is low-cost, and the printed circuit board-based design allows the choice of any surface-mountable microwave connector. We additionally verified operation through consistent use on a real cryogenic system and verified the mechanical robustness of the feedthrough.
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Affiliation(s)
- A N McCaughan
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - J I Gammell
- University of Colorado, Boulder, Colorado 80309, USA
| | - D M Oh
- University of Colorado, Boulder, Colorado 80309, USA
| | - S W Nam
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
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14
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Thekkadath GS, Mycroft ME, Bell BA, Wade CG, Eckstein A, Phillips DS, Patel RB, Buraczewski A, Lita AE, Gerrits T, Nam SW, Stobińska M, Lvovsky AI, Walmsley IA. Quantum-enhanced interferometry with large heralded photon-number states. npj Quantum Inf 2020; 6:10.1038/s41534-020-00320-y. [PMID: 34131511 PMCID: PMC8201641 DOI: 10.1038/s41534-020-00320-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Accepted: 09/04/2020] [Indexed: 05/14/2023]
Abstract
Quantum phenomena such as entanglement can improve fundamental limits on the sensitivity of a measurement probe. In optical interferometry, a probe consisting of N entangled photons provides up to aN enhancement in phase sensitivity compared to a classical probe of the same energy. Here, we employ high-gain parametric down-conversion sources and photon-number-resolving detectors to perform interferometry with heralded quantum probes of sizes up to N = 8 (i.e. measuring up to 16-photon coincidences). Our probes are created by injecting heralded photon-number states into an interferometer, and in principle provide quantum-enhanced phase sensitivity even in the presence of significant optical loss. Our work paves the way towards quantum-enhanced interferometry using large entangled photonic states.
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Affiliation(s)
- G S Thekkadath
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK
| | - M E Mycroft
- Faculty of Physics, University of Warsaw, ul. Pasteura 5, 02-093 Warsaw, Poland
| | - B A Bell
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK
| | - C G Wade
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK
| | - A Eckstein
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK
| | - D S Phillips
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK
| | - R B Patel
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK
| | - A Buraczewski
- Faculty of Physics, University of Warsaw, ul. Pasteura 5, 02-093 Warsaw, Poland
| | - A E Lita
- National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - T Gerrits
- National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
- National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, Maryland 20899, USA
| | - S W Nam
- National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - M Stobińska
- Faculty of Physics, University of Warsaw, ul. Pasteura 5, 02-093 Warsaw, Poland
| | - A I Lvovsky
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK
| | - I A Walmsley
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK
- Department of Physics, Imperial College London, Prince Consort Rd, London SW7 2AZ, UK
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15
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McCaughan AN, Verma VB, Buckley S, Allmaras JP, Kozorezov AG, Tait AN, Nam SW, Shainline JM. A superconducting thermal switch with ultrahigh impedance for interfacing superconductors to semiconductors. Nat Electron 2019; 2:10.1038/s41928-019-0300-8. [PMID: 32118196 PMCID: PMC7047719 DOI: 10.1038/s41928-019-0300-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 08/12/2019] [Indexed: 05/31/2023]
Abstract
A number of current approaches to quantum and neuromorphic computing use superconductors as the basis of their platform or as a measurement component, and will need to operate at cryogenic temperatures. Semiconductor systems are typically proposed as a top-level control in these architectures, with low-temperature passive components and intermediary superconducting electronics acting as the direct interface to the lowest-temperature stages. The architectures, therefore, require a low-power superconductor-semiconductor interface, which is not currently available. Here we report a superconducting switch that is capable of translating low-voltage superconducting inputs directly into semiconductor-compatible (above 1,000 mV) outputs at kelvin-scale temperatures (1K or 4 K). To illustrate the capabilities in interfacing superconductors and semiconductors, we use it to drive a light-emitting diode (LED) in a photonic integrated circuit, generating photons at 1K from a low-voltage input and detecting them with an on-chip superconducting single-photon detector. We also characterize our device's timing response (less than 300 ps turn-on, 15 ns turn-off), output impedance (greater than 1MΩ), and energy requirements (0.18fJ/μm2,3.24mV/nW).
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Affiliation(s)
- A N McCaughan
- National Institute of Standards and Technology, Boulder, CO 80305
| | - V B Verma
- National Institute of Standards and Technology, Boulder, CO 80305
| | - S Buckley
- National Institute of Standards and Technology, Boulder, CO 80305
| | - J P Allmaras
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, USA
| | - A G Kozorezov
- Department of Physics, Lancaster University, Lancaster LA1 4YB, United Kingdom
| | - A N Tait
- National Institute of Standards and Technology, Boulder, CO 80305
| | - S W Nam
- National Institute of Standards and Technology, Boulder, CO 80305
| | - J M Shainline
- National Institute of Standards and Technology, Boulder, CO 80305
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16
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Cavaillès A, Le Jeannic H, Raskop J, Guccione G, Markham D, Diamanti E, Shaw MD, Verma VB, Nam SW, Laurat J. Demonstration of Einstein-Podolsky-Rosen Steering Using Hybrid Continuous- and Discrete-Variable Entanglement of Light. Phys Rev Lett 2018; 121:170403. [PMID: 30411932 DOI: 10.1103/physrevlett.121.170403] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Indexed: 06/08/2023]
Abstract
Einstein-Podolsky-Rosen steering is known to be a key resource for one-sided device-independent quantum information protocols. Here we demonstrate steering using hybrid entanglement between continuous- and discrete-variable optical qubits. To this end, we report on suitable steering inequalities and detail the implementation and requirements for this demonstration. Steering is experimentally certified by observing a violation by more than 5 standard deviations. Our results illustrate the potential of optical hybrid entanglement for applications in heterogeneous quantum networks that would interconnect disparate physical platforms and encodings.
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Affiliation(s)
- A Cavaillès
- Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-Université PSL, Collège de France, 4 Place Jussieu, 75005 Paris, France
| | - H Le Jeannic
- Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-Université PSL, Collège de France, 4 Place Jussieu, 75005 Paris, France
| | - J Raskop
- Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-Université PSL, Collège de France, 4 Place Jussieu, 75005 Paris, France
| | - G Guccione
- Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-Université PSL, Collège de France, 4 Place Jussieu, 75005 Paris, France
| | - D Markham
- Laboratoire d'Informatique de Paris 6, Sorbonne Université, CNRS, 4 Place Jussieu, 75005 Paris, France
| | - E Diamanti
- Laboratoire d'Informatique de Paris 6, Sorbonne Université, CNRS, 4 Place Jussieu, 75005 Paris, France
| | - M D Shaw
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109, USA
| | - V B Verma
- National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - S W Nam
- National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - J Laurat
- Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-Université PSL, Collège de France, 4 Place Jussieu, 75005 Paris, France
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17
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Yoo SH, Kwon JH, Nam SW, Kim HY, Kim CW, You CR, Choi SW, Cho SH, Han JY, Song DS, Chang UI, Yang JM, Lee HL, Lee SW, Han NI, Kim SH, Song MJ, Hwang S, Sung PS, Jang JW, Bae SH, Choi JY, Yoon SK. Early development of de novo hepatocellular carcinoma after direct-acting agent therapy: Comparison with pegylated interferon-based therapy in chronic hepatitis C patients. J Viral Hepat 2018; 25:1189-1196. [PMID: 29660199 DOI: 10.1111/jvh.12918] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Accepted: 03/26/2018] [Indexed: 01/18/2023]
Abstract
Patients with chronic hepatitis C who achieve a sustained viral response after pegylated interferon therapy have a reduced risk of hepatocellular carcinoma, but the risk after treatment with direct-acting antivirals is unclear. We compared the rates of early development of hepatocellular carcinoma after direct-acting antivirals and after pegylated interferon therapy. We retrospectively analysed 785 patients with chronic hepatitis C who had no history of hepatocellular carcinoma (211 treated with pegylated interferon, 574 with direct-acting antivirals) and were followed up for at least 24 weeks after antiviral treatment. De novo hepatocellular carcinoma developed in 6 of 574 patients receiving direct-acting antivirals and in 1 of 211 patients receiving pegylated interferon. The cumulative incidence of early hepatocellular carcinoma development did not differ between the treatment groups either for the whole cohort (1.05% vs 0.47%, P = .298) or for those patients with Child-Pugh Class A cirrhosis (3.73% vs 2.94%, P = .827). Multivariate analysis indicated that alpha-fetoprotein level >9.5 ng/mL at the time of end-of-treatment response was the only independent risk factor for early development of hepatocellular carcinoma in all patients (P < .0001, hazard ratio 176.174, 95% confidence interval 10.768-2882.473) and in patients treated with direct-acting agents (P < .0001, hazard ratio 128.402, 95% confidence interval 8.417-1958.680). In conclusion, the rate of early development of hepatocellular carcinoma did not differ between patients treated with pegylated interferon and those treated with direct-acting antivirals and was associated with the serum alpha-fetoprotein level at the time of end-of-treatment response.
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Affiliation(s)
- S H Yoo
- Department of Internal Medicine, Incheon St. Mary's Hospital, The Catholic University of Korea, Incehon, Korea.,Catholic University Liver Research Center, The Catholic University of Korea, Seoul, Korea
| | - J H Kwon
- Department of Internal Medicine, Incheon St. Mary's Hospital, The Catholic University of Korea, Incehon, Korea.,Catholic University Liver Research Center, The Catholic University of Korea, Seoul, Korea
| | - S W Nam
- Department of Internal Medicine, Incheon St. Mary's Hospital, The Catholic University of Korea, Incehon, Korea.,Catholic University Liver Research Center, The Catholic University of Korea, Seoul, Korea
| | - H Y Kim
- Catholic University Liver Research Center, The Catholic University of Korea, Seoul, Korea.,Department of Internal Medicine, Uijeongbu St. Mary's Hospital, The Catholic University of Korea, Uijeongbu, Korea
| | - C W Kim
- Catholic University Liver Research Center, The Catholic University of Korea, Seoul, Korea.,Department of Internal Medicine, Uijeongbu St. Mary's Hospital, The Catholic University of Korea, Uijeongbu, Korea
| | - C R You
- Catholic University Liver Research Center, The Catholic University of Korea, Seoul, Korea.,Department of Internal Medicine, St. Paul's Hospital, The Catholic University of Korea, Seoul, Korea
| | - S W Choi
- Catholic University Liver Research Center, The Catholic University of Korea, Seoul, Korea.,Department of Internal Medicine, St. Paul's Hospital, The Catholic University of Korea, Seoul, Korea
| | - S H Cho
- Catholic University Liver Research Center, The Catholic University of Korea, Seoul, Korea.,Department of Internal Medicine, Yeouido St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - J-Y Han
- Catholic University Liver Research Center, The Catholic University of Korea, Seoul, Korea.,Department of Internal Medicine, Yeouido St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - D S Song
- Catholic University Liver Research Center, The Catholic University of Korea, Seoul, Korea.,Department of Internal Medicine, St. Vincent's Hospital, The Catholic University of Korea, Suwon, Korea
| | - U I Chang
- Catholic University Liver Research Center, The Catholic University of Korea, Seoul, Korea.,Department of Internal Medicine, St. Vincent's Hospital, The Catholic University of Korea, Suwon, Korea
| | - J M Yang
- Catholic University Liver Research Center, The Catholic University of Korea, Seoul, Korea.,Department of Internal Medicine, St. Vincent's Hospital, The Catholic University of Korea, Suwon, Korea
| | - H L Lee
- Catholic University Liver Research Center, The Catholic University of Korea, Seoul, Korea.,Department of Internal Medicine, Bucheon St. Mary's Hospital, The Catholic University of Korea, Bucheon, Korea
| | - S W Lee
- Catholic University Liver Research Center, The Catholic University of Korea, Seoul, Korea.,Department of Internal Medicine, Bucheon St. Mary's Hospital, The Catholic University of Korea, Bucheon, Korea
| | - N I Han
- Catholic University Liver Research Center, The Catholic University of Korea, Seoul, Korea.,Department of Internal Medicine, Bucheon St. Mary's Hospital, The Catholic University of Korea, Bucheon, Korea
| | - S-H Kim
- Catholic University Liver Research Center, The Catholic University of Korea, Seoul, Korea.,Department of Internal Medicine, Daejeon St. Mary's Hospital, The Catholic University of Korea, Daejeon, Korea
| | - M J Song
- Catholic University Liver Research Center, The Catholic University of Korea, Seoul, Korea.,Department of Internal Medicine, Daejeon St. Mary's Hospital, The Catholic University of Korea, Daejeon, Korea
| | - S Hwang
- Catholic University Liver Research Center, The Catholic University of Korea, Seoul, Korea.,Department of Internal Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - P S Sung
- Catholic University Liver Research Center, The Catholic University of Korea, Seoul, Korea.,Department of Internal Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - J W Jang
- Catholic University Liver Research Center, The Catholic University of Korea, Seoul, Korea.,Department of Internal Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - S H Bae
- Catholic University Liver Research Center, The Catholic University of Korea, Seoul, Korea.,Department of Internal Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - J Y Choi
- Catholic University Liver Research Center, The Catholic University of Korea, Seoul, Korea.,Department of Internal Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - S K Yoon
- Catholic University Liver Research Center, The Catholic University of Korea, Seoul, Korea.,Department of Internal Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
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18
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Jung SY, Jang EJ, Nam SW, Kwon HH, Im SG, Kim D, Cho SK, Kim D, Sung YK. Comparative effectiveness of oral pharmacologic interventions for knee osteoarthritis: A network meta-analysis. Mod Rheumatol 2018; 28:1021-1028. [DOI: 10.1080/14397595.2018.1439694] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Sun-Young Jung
- College of Pharmacy, Chung-Ang University, Seoul, South Korea
| | - Eun Jin Jang
- Department of Information Statistics, Andong National University, Andong-si, South Korea
| | - Seoung Wan Nam
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, South Korea
| | - Hyuk Hee Kwon
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, South Korea
| | - Seul Gi Im
- Department of Statistics, Kyungpook National University, Daegu, South Korea
| | - Dam Kim
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, South Korea
| | - Soo-Kyung Cho
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, South Korea
| | - Dalho Kim
- Department of Statistics, Kyungpook National University, Daegu, South Korea
| | - Yoon-Kyoung Sung
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, South Korea
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19
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Yoo KE, Nam SW, Kwon HH, Lee S, Jun JB, Sung YK, Cho SK. Case of Polymyalgia Rheumatica Misdiagnosed as Infectious Spondylitis. J Rheum Dis 2018. [DOI: 10.4078/jrd.2018.25.2.140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Kee Eon Yoo
- Department of Internal Medicine, Hanyang University Seoul Hospital, Seoul, Korea
| | - Seoung Wan Nam
- Department of Internal Medicine, Hanyang University Seoul Hospital, Seoul, Korea
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Korea
| | - Hyuk Hee Kwon
- Department of Internal Medicine, Hanyang University Seoul Hospital, Seoul, Korea
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Korea
| | - Seunghun Lee
- Department of Radiology, Hanyang University College of Medicine, Seoul, Korea
| | - Jae-Bum Jun
- Department of Internal Medicine, Hanyang University Seoul Hospital, Seoul, Korea
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Korea
| | - Yoon-Kyoung Sung
- Department of Internal Medicine, Hanyang University Seoul Hospital, Seoul, Korea
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Korea
| | - Soo-Kyung Cho
- Department of Internal Medicine, Hanyang University Seoul Hospital, Seoul, Korea
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Korea
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20
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Nam SW, Cho SK, Kim D, Lee KE, Park DJ, Lee SS, Sung YK. Antiphospholipid Antibody Positivity and the Clinical Outcomes of Patients with Systemic Lupus Erythematosus. J Rheum Dis 2018. [DOI: 10.4078/jrd.2018.25.4.239] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Seoung Wan Nam
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Korea
| | - Soo-Kyung Cho
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Korea
| | - Dam Kim
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Korea
| | - Kyung-Eun Lee
- Division of Rheumatology, Department of Internal Medicine, Chonnam National University Medical School and Hospital, Gwangju, Korea
| | - Dong-Jin Park
- Division of Rheumatology, Department of Internal Medicine, Chonnam National University Medical School and Hospital, Gwangju, Korea
| | - Shin-Seok Lee
- Division of Rheumatology, Department of Internal Medicine, Chonnam National University Medical School and Hospital, Gwangju, Korea
| | - Yoon-Kyoung Sung
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Korea
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21
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Wollman EE, Verma VB, Beyer AD, Briggs RM, Korzh B, Allmaras JP, Marsili F, Lita AE, Mirin RP, Nam SW, Shaw MD. UV superconducting nanowire single-photon detectors with high efficiency, low noise, and 4 K operating temperature. Opt Express 2017; 25:26792-26801. [PMID: 29092164 DOI: 10.1364/oe.25.026792] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 09/23/2017] [Indexed: 06/07/2023]
Abstract
For photon-counting applications at ultraviolet wavelengths, there are currently no detectors that combine high efficiency (> 50%), sub-nanosecond timing resolution, and sub-Hz dark count rates. Superconducting nanowire single-photon detectors (SNSPDs) have seen success over the past decade for photon-counting applications in the near-infrared, but little work has been done to optimize SNSPDs for wavelengths below 400 nm. Here, we describe the design, fabrication, and characterization of UV SNSPDs operating at wavelengths between 250 and 370 nm. The detectors have active areas up to 56 μm in diameter, 70 - 80% efficiency at temperatures up to 4.2 K, timing resolution down to 60 ps FWHM, blindness to visible and infrared photons, and dark count rates of ∼ 0.25 counts/hr for a 56 μm diameter pixel. These performance metrics make UV SNSPDs ideal for applications in trapped-ion quantum information processing, lidar studies of the upper atmosphere, UV fluorescent-lifetime imaging microscopy, and photon-starved UV astronomy.
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22
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Mueller I, Horansky RD, Lehman JH, Nam SW, Vayshenker I, Werner L, Wuebbeler G, White M. Verification of calibration methods for determining photon-counting detection efficiency using superconducting nano-wire single photon detectors. Opt Express 2017; 25:21483-21495. [PMID: 29041446 DOI: 10.1364/oe.25.021483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Accepted: 08/03/2017] [Indexed: 06/07/2023]
Abstract
In recent years several ways to radiometrically calibrate optical fiber-coupled detectors have been developed. However, fiber-coupled calibration methods for single photon detectors have not been compared by national metrology institutes in order to validate their equivalence or traceability to the international systems of units yet.. Here, we present the comparison of radiometric calibration methods traceable to a NIST cryogenic radiometer at the 'few-photon' level. The calibration methods are based on metrology grade optical power meters. The expanded (k = 2) relative standard uncertainties of the calibration methods for the detection efficiency are of the order of 0.5%. However, the results changed relatively by 10% with a different set of optical fibers and mating connectors. These results stress the importance of fiber-core dimensions and fiber-connector repeatability.
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23
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Grimau Puigibert M, Aguilar GH, Zhou Q, Marsili F, Shaw MD, Verma VB, Nam SW, Oblak D, Tittel W. Heralded Single Photons Based on Spectral Multiplexing and Feed-Forward Control. Phys Rev Lett 2017; 119:083601. [PMID: 28952756 DOI: 10.1103/physrevlett.119.083601] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Indexed: 06/07/2023]
Abstract
We propose and experimentally demonstrate a novel approach to a heralded single-photon source based on spectral multiplexing (SMUX) and feed-forward-based spectral manipulation of photons created by means of spontaneous parametric down-conversion in a periodically poled LiNbO_{3} crystal. As a proof of principle, we show that our three-mode SMUX increases the heralded single-photon rate compared to that of the individual modes without compromising the quality of the emitted single photons. We project that by adding further modes, our approach can lead to a deterministic single-photon source.
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Affiliation(s)
- M Grimau Puigibert
- Institute for Quantum Science and Technology, and Department of Physics & Astronomy, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - G H Aguilar
- Institute for Quantum Science and Technology, and Department of Physics & Astronomy, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Q Zhou
- Institute for Quantum Science and Technology, and Department of Physics & Astronomy, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - F Marsili
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109, USA
| | - M D Shaw
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109, USA
| | - V B Verma
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - S W Nam
- National Institute of Standards and Technology, Boulder, Colorado 80305, USA
| | - D Oblak
- Institute for Quantum Science and Technology, and Department of Physics & Astronomy, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - W Tittel
- Institute for Quantum Science and Technology, and Department of Physics & Astronomy, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
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24
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Sperling J, Clements WR, Eckstein A, Moore M, Renema JJ, Kolthammer WS, Nam SW, Lita A, Gerrits T, Vogel W, Agarwal GS, Walmsley IA. Detector-Independent Verification of Quantum Light. Phys Rev Lett 2017; 118:163602. [PMID: 28474918 PMCID: PMC5894853 DOI: 10.1103/physrevlett.118.163602] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Indexed: 06/07/2023]
Abstract
We introduce a method for the verification of nonclassical light which is independent of the complex interaction between the generated light and the material of the detectors. This is accomplished by means of a multiplexing arrangement. Its theoretical description yields that the coincidence statistics of this measurement layout is a mixture of multinomial distributions for any classical light field and any type of detector. This allows us to formulate bounds on the statistical properties of classical states. We apply our directly accessible method to heralded multiphoton states which are detected with a single multiplexing step only and two detectors, which are in our work superconducting transition-edge sensors. The nonclassicality of the generated light is verified and characterized through the violation of the classical bounds without the need for characterizing the used detectors.
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Affiliation(s)
- J Sperling
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
| | - W R Clements
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
| | - A Eckstein
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
| | - M Moore
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
| | - J J Renema
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
| | - W S Kolthammer
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
| | - S W Nam
- National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - A Lita
- National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - T Gerrits
- National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - W Vogel
- Institut für Physik, Universität Rostock, Albert-Einstein-Straße 23, D-18059 Rostock, Germany
| | - G S Agarwal
- Texas A&M University, College Station, Texas 77845, USA
| | - I A Walmsley
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
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25
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Slichter DH, Verma VB, Leibfried D, Mirin RP, Nam SW, Wineland DJ. UV-sensitive superconducting nanowire single photon detectors for integration in an ion trap. Opt Express 2017; 25:8705-8720. [PMID: 28437948 DOI: 10.1364/oe.25.008705] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We demonstrate superconducting nanowire single photon detectors with 76 ± 4% system detection efficiency at a wavelength of 315 nm and an operating temperature of 3.2 K, with a background count rate below 1 count per second at saturated detection efficiency. We propose integrating these detectors into planar surface electrode radio-frequency Paul traps for use in trapped ion quantum information processing. We operate detectors integrated into test ion trap structures at 3.8 K both with and without typical radio-frequency trapping electric fields. The trapping fields reduce system detection efficiency by 9%, but do not increase background count rates.
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26
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Kim D, Cho SK, Nam SW, Kwon HH, Jung SY, Jeon CH, Im SG, Kim D, Jang EJ, Sung YK. Cardiovascular and Gastrointestinal Effects of Etoricoxib in the Treatment of Osteoarthritis: A Systematic Review and Network Meta-analysis. J Rheum Dis 2017. [DOI: 10.4078/jrd.2017.24.5.293] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Dam Kim
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Korea
| | - Soo-Kyung Cho
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Korea
| | - Seoung Wan Nam
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Korea
| | - Hyuk Hee Kwon
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Korea
| | | | - Chan Hong Jeon
- Division of Rheumatology, Department of Internal Medicine, Soon Chun Hyang University Bucheon Hospital, Bucheon, Korea
| | - Seul Gi Im
- Department of Statistics, Kyungpook National University, Daegu, Korea
| | - Dalho Kim
- Department of Statistics, Kyungpook National University, Daegu, Korea
| | - Eun Jin Jang
- Department of Information Statistics, Andong National University, Andong, Korea
| | - Yoon-Kyoung Sung
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Korea
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27
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Guerreiro T, Monteiro F, Martin A, Brask JB, Vértesi T, Korzh B, Caloz M, Bussières F, Verma VB, Lita AE, Mirin RP, Nam SW, Marsilli F, Shaw MD, Gisin N, Brunner N, Zbinden H, Thew RT. Demonstration of Einstein-Podolsky-Rosen Steering Using Single-Photon Path Entanglement and Displacement-Based Detection. Phys Rev Lett 2016; 117:070404. [PMID: 27563941 DOI: 10.1103/physrevlett.117.070404] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Indexed: 06/06/2023]
Abstract
We demonstrate the violation of an Einstein-Podolsky-Rosen steering inequality developed for single-photon path entanglement with displacement-based detection. We use a high-rate source of heralded single-photon path-entangled states, combined with high-efficiency superconducting-based detectors, in a scheme that is free of any postselection and thus immune to the detection loophole. This result conclusively demonstrates single-photon entanglement in a one-sided device-independent scenario, and opens the way towards implementations of device-independent quantum technologies within the paradigm of path entanglement.
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Affiliation(s)
- T Guerreiro
- Group of Applied Physics, University of Geneva, CH-1211 Geneva 4, Switzerland
| | - F Monteiro
- Group of Applied Physics, University of Geneva, CH-1211 Geneva 4, Switzerland
| | - A Martin
- Group of Applied Physics, University of Geneva, CH-1211 Geneva 4, Switzerland
| | - J B Brask
- Département de Physique Théorique, Université de Genève, CH-1211 Geneva 4, Switzerland
| | - T Vértesi
- Institute for Nuclear Research, Hungarian Academy of Sciences, H4001-Debrecen, P.O. Box 51, Hungary
| | - B Korzh
- Group of Applied Physics, University of Geneva, CH-1211 Geneva 4, Switzerland
| | - M Caloz
- Group of Applied Physics, University of Geneva, CH-1211 Geneva 4, Switzerland
| | - F Bussières
- Group of Applied Physics, University of Geneva, CH-1211 Geneva 4, Switzerland
| | - V B Verma
- National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - A E Lita
- National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - R P Mirin
- National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - S W Nam
- National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - F Marsilli
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109, USA
| | - M D Shaw
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109, USA
| | - N Gisin
- Group of Applied Physics, University of Geneva, CH-1211 Geneva 4, Switzerland
| | - N Brunner
- Département de Physique Théorique, Université de Genève, CH-1211 Geneva 4, Switzerland
| | - H Zbinden
- Group of Applied Physics, University of Geneva, CH-1211 Geneva 4, Switzerland
| | - R T Thew
- Group of Applied Physics, University of Geneva, CH-1211 Geneva 4, Switzerland
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28
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Nam SW, Lee JW, Sim JH, Pack HS, Im C, Lim JS, Ahn SG. A patient with stress induced cardiomyopathy that occurred after cessation of hormone replacement therapy for panhypopituitarism. Yeungnam Univ J Med 2016. [DOI: 10.12701/yujm.2016.33.2.125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Affiliation(s)
- Seoung Wan Nam
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Jun-Won Lee
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Jeong Han Sim
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Hyun Sung Pack
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Changjo Im
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Jung Soo Lim
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Sung Gyun Ahn
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
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29
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Verma VB, Korzh B, Bussières F, Horansky RD, Dyer SD, Lita AE, Vayshenker I, Marsili F, Shaw MD, Zbinden H, Mirin RP, Nam SW. High-efficiency superconducting nanowire single-photon detectors fabricated from MoSi thin-films. Opt Express 2015; 23:33792-33801. [PMID: 26832040 DOI: 10.1364/oe.23.033792] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We report on MoSi SNSPDs which achieved high system detection efficiency (87.1 ± 0.5% at 1542 nm) at 0.7 K and we demonstrate that these detectors can also be operated with saturated internal efficiency at a temperature of 2.3 K in a Gifford-McMahon cryocooler. We measured a minimum system jitter of 76 ps, maximum count rate approaching 10 MHz, and polarization dependence as low as 3.3 ± 0.1%. The performance of MoSi SNSPDs at 2.3 K is similar to the performance of WSi SNSPDs at < 1 K. The higher operating temperature of MoSi SNSPDs makes these devices promising for widespread use due to the simpler and less expensive cryogenics required for their operation.
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30
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Kang H, Kim C, Lee H, Rho JG, Seo JW, Nam JW, Song WK, Nam SW, Kim W, Lee EK. Downregulation of microRNA-362-3p and microRNA-329 promotes tumor progression in human breast cancer. Cell Death Differ 2015; 23:484-95. [PMID: 26337669 DOI: 10.1038/cdd.2015.116] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2015] [Revised: 06/15/2015] [Accepted: 06/26/2015] [Indexed: 12/31/2022] Open
Abstract
p130Cas regulates cancer progression by driving tyrosine receptor kinase signaling. Tight regulation of p130Cas expression is necessary for survival, apoptosis, and maintenance of cell motility in various cell types. Several studies revealed that transcriptional and post-translational control of p130Cas are important for maintenance of its expression and activity. To explore novel regulatory mechanisms of p130Cas expression, we studied the effect of microRNAs (miRs) on p130Cas expression in human breast cancer MCF7 cells. Here, we provide experimental evidence that miR-362-3p and miR-329 perform a tumor-suppressive function and their expression is downregulated in human breast cancer. miR-362-3p and miR-329 inhibited cellular proliferation, migration, and invasion, thereby suppressing tumor growth, by downregulating p130Cas. Ectopic expression of p130Cas attenuated the inhibitory effects of the two miRs on tumor progression. Relative expression levels of miR-362-3p/329 and p130Cas between normal and breast cancer correlated inversely; miR-362-3p/329 expression was decreased, whereas that of p130Cas increased in breast cancers. Furthermore, we showed that downregulation of miR-362-3p and miR-329 was caused by differential DNA methylation of miR genes. Enhanced DNA methylation (according to methylation-specific PCR) was responsible for downregulation of miR-362-3p and miR-329 in breast cancer. Taken together, these findings point to a novel role for miR-362-3p and miR-329 as tumor suppressors; the miR-362-3p/miR-329-p130Cas axis seemingly has a crucial role in breast cancer progression. Thus, modulation of miR-362-3p/miR-329 may be a novel therapeutic strategy against breast cancer.
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Affiliation(s)
- H Kang
- Department of Biochemistry, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - C Kim
- Department of Biochemistry, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - H Lee
- Department of Biochemistry, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - J G Rho
- Department of Molecular Science and Technology, Ajou University, Suwon, South Korea
| | - J-W Seo
- Department of Life Science, College of Natural Sciences, Hanyang University, Seoul, South Korea
| | - J-W Nam
- Department of Life Science, College of Natural Sciences, Hanyang University, Seoul, South Korea
| | - W K Song
- Department of Life Science, Bio Imaging and Cell Dynamics Research Center, Gwangju Institute of Science and Technology, Gwangju, South Korea
| | - S W Nam
- Department of Pathology, College of Medicine, The Catholic University of Korea, Seoul, South Korea.,Cancer Evolution Center, College of Medicine, Catholic University of Korea, Seoul, South Korea
| | - W Kim
- Department of Molecular Science and Technology, Ajou University, Suwon, South Korea
| | - E K Lee
- Department of Biochemistry, College of Medicine, The Catholic University of Korea, Seoul, South Korea.,Cancer Evolution Center, College of Medicine, Catholic University of Korea, Seoul, South Korea
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31
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Lee HS, Park JE, Nam SW, Shim KY, Kang T. Idiopathic Retroperitoneal Fibrosis Associated with Rheumatoid Arthritis in a Patient with Concomitant Chronic B Viral Hepatitis. J Rheum Dis 2015. [DOI: 10.4078/jrd.2015.22.2.123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Hyang Sun Lee
- Department of Rheumatology, Wonju Severance Christian Hospital, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Jeong Eun Park
- Department of Internal Medicine, Wonju Severance Christian Hospital, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Seoung Wan Nam
- Department of Internal Medicine, Wonju Severance Christian Hospital, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Kwang Yong Shim
- Department of Haemato-Oncology, Wonju Severance Christian Hospital, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Taeyoung Kang
- Department of Rheumatology, Wonju Severance Christian Hospital, Yonsei University Wonju College of Medicine, Wonju, Korea
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32
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Noeiaghaei T, Yun JH, Nam SW, Zoh KD, Gomes VG, Kim JO, Chae SR. The influence of geometrical characteristics on the photocatalytic activity of TiO2 nanotube arrays for degradation of refractory organic pollutants in wastewater. Water Sci Technol 2015; 71:1301-1309. [PMID: 25945845 DOI: 10.2166/wst.2015.078] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The effects of geometrical characteristics such as surface area (SA) and porosity of TiO2 nanotube arrays (TNAs) on its photocatalytic activity were investigated by applying variable voltages and reaction times for the anodization of Ti substrates. While larger SA of nanotubes was observed under higher applied potential, the porosity of TNAs decreased by increasing anodizing voltage. Under applied potential of 80 V, the SA of TNAs increased from 0.164 to 0.471 m2/g as anodization time increased from 1 to 5 hours, respectively. However, no significant effect on the porosity of TNAs was observed. On the other hand, both SA and porosity of TNAs, synthesized at 60 V, increased by augmenting the anodization time from 1 to 3 hours. But further increasing of anodization time to 5 hours resulted in a decreased SA of TNAs with no effect on their porosity. Accordingly, the TNAs with SA of 0.368 m2/g and porosity of 47% showed the highest photocatalytic activity for degradation of 4-chlorobenzoic acid (4CBA). Finally, the degradation of refractory model compounds such as carbamazepine and bisphenol-A was tested and more than 50% of both compounds could be degraded under UV-A irradiation (λmax=365 nm).
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Affiliation(s)
- T Noeiaghaei
- School of Chemical and Biomolecular Engineering, The University of Sydney, NSW 2006, Australia
| | - J-H Yun
- Nanomaterials Centre, School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - S W Nam
- Department of Environmental Health, School of Public Health, Seoul National University, Seoul 151-742, South Korea
| | - K D Zoh
- Department of Environmental Health, School of Public Health, Seoul National University, Seoul 151-742, South Korea
| | - V G Gomes
- School of Chemical and Biomolecular Engineering, The University of Sydney, NSW 2006, Australia
| | - J O Kim
- Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-792, Republic of Korea
| | - S R Chae
- Department of Biomedical, Chemical, and Environmental Engineering, 701 Engineering Research Center, University of Cincinnati, Cincinnati, Ohio 45221-0012, USA E-mail:
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Valivarthi R, Lucio-Martinez I, Rubenok A, Chan P, Marsili F, Verma VB, Shaw MD, Stern JA, Slater JA, Oblak D, Nam SW, Tittel W. Efficient Bell state analyzer for time-bin qubits with fast-recovery WSi superconducting single photon detectors. Opt Express 2014; 22:24497-24506. [PMID: 25322025 DOI: 10.1364/oe.22.024497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We experimentally demonstrate a high-efficiency Bell state measurement for time-bin qubits that employs two superconducting nanowire single-photon detectors with short dead-times, allowing projections onto two Bell states, |ψ⁻〉 and |ψ⁺〉. Compared to previous implementations for time-bin qubits, this yields an increase in the efficiency of Bell state analysis by a factor of thirty.
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Choi S, Shin JH, Nam SW, Jang H, Tao T, Kwak HW, Jin KH, Lee GJ, Park HK. Mid-long term effect of non-ablative high radiofrequency therapy on the rabbit dermal extracellular matrix. Annu Int Conf IEEE Eng Med Biol Soc 2013; 2013:3761-4. [PMID: 24110549 DOI: 10.1109/embc.2013.6610362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This study quantitatively investigated the postoperative effects of radiofrequency (RF) application on the normal dermal extracellular matrix (ECM) of in vivo rabbits. Postoperative effects were evaluated by histology and atomic force microscopy analysis of dermal tissues treated using three RF energy levels (10 ~ 30 W) and either a single- or multiple-pass procedure. Progressive changes in the morphology of rabbit dermal ECMs were investigated over a 30-day postoperartive period. All RF-treated groups, except for the low energy group (10 W), displayed more prominent inflammatory responses compared to the control. This inflammatory reaction was more prominent a day after application. Dermal tissues 30 days after RF application exhibited prominent myofibroblast activity associated with ECM contractile activity during wound healing in addition to chronic inflammation. A decrease in the morphology of dermal ECMs after RF application continued until seven days postoperatively. The ECM diameter increased to near baseline at 30 days postoperatively. Low energy and multi-pass applications resulted in greater collagen fibril contraction and recovery at the ultra-structural level at 30 days postoperatively than did a single high energy application.
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Christensen BG, McCusker KT, Altepeter JB, Calkins B, Gerrits T, Lita AE, Miller A, Shalm LK, Zhang Y, Nam SW, Brunner N, Lim CCW, Gisin N, Kwiat PG. Detection-loophole-free test of quantum nonlocality, and applications. Phys Rev Lett 2013; 111:130406. [PMID: 24116754 DOI: 10.1103/physrevlett.111.130406] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Indexed: 06/02/2023]
Abstract
We present a source of entangled photons that violates a Bell inequality free of the "fair-sampling" assumption, by over 7 standard deviations. This violation is the first reported experiment with photons to close the detection loophole, and we demonstrate enough "efficiency" overhead to eventually perform a fully loophole-free test of local realism. The entanglement quality is verified by maximally violating additional Bell tests, testing the upper limit of quantum correlations. Finally, we use the source to generate "device-independent" private quantum random numbers at rates over 4 orders of magnitude beyond previous experiments.
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Affiliation(s)
- B G Christensen
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
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Abstract
The INU genes of Kluyveromyces marxianus encode inulinases which are readily secreted from Saccharomyces cerevisiae into the culture medium. To evaluate the utility of the INU signal peptides for the secretion of heterologous proteins from S. cerevisiae, a variety of expression and secretion vectors were constructed with GAL10 promoter and GAL7 terminator. The coding sequence for human lipocortin-1 (LC1) was inserted in-frame with the INU signal sequences, and then the secretion efficiency and localization of LC1 were investigated in more detail and compared with those when being expressed by the vector with the MFalpha1 leader peptide. The vector systems with INU signal peptides secreted ca. 95% of the total LC1 expressed into the extracellular medium, while the MFalpha1 leader peptide-containing vector resulted in very low secretion efficiency below 10%. In addition, recombinant human interleukin-2 (IL-2) was expressed and secreted with the vector systems with INU signal peptide, and a majority fraction of the human IL-2 expressed was found to be secreted into the extracellular medium as observed in LC1 expression. (c) 1995 John Wiley & Sons, Inc.
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Affiliation(s)
- B H Chung
- Korea Research Institute of Bioscience and Biotechnology, P.O. Box 115, Yusong, Taejon 305-600, Korea
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37
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Kim S, Lee CH, Nam SW, Kim P. Alteration of reducing powers in an isogenic phosphoglucose isomerase (pgi)-disrupted Escherichia coli expressing NAD(P)-dependent malic enzymes and NADP-dependent glyceraldehyde 3-phosphate dehydrogenase. Lett Appl Microbiol 2011; 52:433-40. [PMID: 21272045 DOI: 10.1111/j.1472-765x.2011.03013.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIMS To understand the intracellular reducing power metabolism, growth and intracellular NAD(P)H concentrations of a phosphoglucose isomerase (pgi)-disrupted Escherichia coli (KS002) were investigated with the expressions of redox enzymes. METHODS AND RESULTS The isogenic pgi-mutation enabled E. coli to harbour two times both the intracellular NADPH and NADH at half the growth rate. The wild-type expressing NAD-dependent malic enzyme (maeA) was incapable of sufficient growth (<0·02 h(-1)), and the growth retardations were distinctively recovered when NADP-dependent glyceraldehyde-3-phosphate dehydrogenase (gapB) from Bacillus subtilis was coexpressed. The KS002 expressing maeA harboured the highest intracellular reducing powers (NADPH of 3·9 and NADH of 5·2 μmol g DCW(-1) ) by three times each of those in wild type. The expression of NADP-dependent malic enzyme (maeB) enabled wild-type and KS002 strains to grow without significant alteration. CONCLUSIONS The alterations of reducing powers and the growth were analysed in the genetic engineered E. coli strains. The potential application of the cells with the high intracellular NAD(P)H level is discussed based on the results. SIGNIFICANCE AND IMPACT OF THE STUDY Metabolic engineering strategy for higher reducing power regeneration is provided.
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Affiliation(s)
- S Kim
- Department of Biotechnology, Catholic University of Korea, Bucheon, Gyeonggi, Korea
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Nam SW, Lim YS, Choi SM, Seo WS, Park K. Thermoelectric properties of nanocrystalline Ca(3-x)Cu(x)Co4O9 (0 < or = x < or = 0.32) for power generation. J Nanosci Nanotechnol 2011; 11:1734-1737. [PMID: 21456279 DOI: 10.1166/jnn.2011.3347] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We successfully synthesized nano-sized Ca(3-x)Cu(x)Co4O9 (0 < or = x < or = 0.32) powders by solution combustion process. Plate-like grains and porous structure were observed in the sintered Ca(3-x)Cu(x)Co4O9 ceramics. The sintered Ca(3-x)Cu(x)Co4O9 showed a monoclinic symmetry. The electrical conductivity of the Ca(3-x)Cu(x)Co4O9 increased with increasing temperature, indicative of a semiconducting behavior. The added Cu led to a significant increase in the electrical conductivity. The Seebeck coefficient of the Cu-added Ca(3-x)Cu(x)Co4O9 was much higher than that of the Cu-free Ca3Co4O9. The highest power factor (9.99 x 10(-4) Wm(-1)K-2) was obtained for Ca2.76Cu0.24Co4O9 at 800 degrees C.
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Affiliation(s)
- S W Nam
- Faculty of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 143-747, Korea
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Nam SW, Choi JW, Hwang HK, Park K. Improvement in high-temperature thermoelectric properties by adding Mn for Co in Ca3Co4O9. J Nanosci Nanotechnol 2010; 10:7689-7693. [PMID: 21138011 DOI: 10.1166/jnn.2010.2784] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Nano-sized Ca3Co(4-x)Mn(x)O9 (0 < or = x < or = 0.6) thermoelectric powders were synthesized by solution combustion method, using aspartic acid as fuel. The microstructure and high-temperature (500-800 degrees C) thermoelectric properties of the Ca3Co(4-x)Mn(x)O9 were investigated. The addition of Mn for Co in Ca3Co(4-x)Mn(x)O9 resulted in a decrease of the electrical conductivity and a significant increase of the Seebeck coefficient. Consequently, the power factor was remarkably enhanced by the addition of Mn. Ca3Co(3.7)Mn(0.3)O9 sample showed the highest value of the power factor (1.24 x 10(-4) Wm(-1) K(-2)) at 800 degrees C. We believe that the Ca3Co(4-x)Mn(x)O9 is strongly desirable as a novel high-temperature thermoelectric material for power generation.
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Affiliation(s)
- S W Nam
- Faculty of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 143-747, Korea
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Choi JW, Hwang HK, Nam SW, Park K. Electrical properties of nanocrystalline Ce(0.8)Sm(0.2)O(2-delta) and Ce(1-x)Gd(x)O(2-delta) (0.1 < or = x < or = 0.3) ceramics for IT-SOFC. J Nanosci Nanotechnol 2010; 10:7684-7688. [PMID: 21138010 DOI: 10.1166/jnn.2010.2783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Ce(0.8)Sm(0.2)O(2-delta) and Ce(1-x)Gd(x)O(2-delta) (0.1 < or = x < or = 0.3) nano-sized powders were successfully synthesized by the solution combustion synthesis process. The calcined nanopowders showed a ceria-based single phase with a cubic fluorite structure. In this study, we discussed the structural and electrical characteristics of the sintered Ce(0.8)Sm(0.2)O(2-delta) and Ce(1-x)Gd(x)O(2-delta). We obtained high-quality Ce(0.8)Sm(0.2)O(2-delta) and Ce(1-x)Gd(x)O(2-delta) ceramics with a high density, ultra-fine grain size, and high electrical conductivity even at low sintering temperature using the nanosized powders. The electrical conductivities at 800 degrees C for the Ce(0.8)Sm(0.2)O(2-delta) sintered at 1400 degrees C and the Ce(0.8)Gd(0.2)O(2-delta) sintered at 1350 degrees C were 0.110 and 0.104 Scm(-1), respectively.
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Affiliation(s)
- J W Choi
- Faculty of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 143-747, Korea
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Ward MB, Intallura PM, Natarajan CM, Hadfield RH, Atkinson P, Yuan ZL, Miki S, Fujiwara M, Sasaki M, Wang Z, Baek B, Nam SW, Ritchie DA, Shields AJ. Biexciton cascade in telecommunication wavelength quantum dots. ACTA ACUST UNITED AC 2010. [DOI: 10.1088/1742-6596/210/1/012036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Song JH, Maeng EJ, Cao Z, Kim SY, Nam SW, Lee JY, Park WS. The Glu346Lys polymorphism and frameshift mutations of the Methyl-CpG Binding Domain 4 gene in gastrointestinal cancer. Neoplasma 2009; 56:343-7. [PMID: 19469655 DOI: 10.4149/neo_2009_04_343] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
MBD4 (Methyl-CpG Binding Domain 4) is a human DNA repair protein that may be involved in DNA mismatch repair. The polymorphisms and frameshift mutations in MBD4 may influence cancer susceptibility and the development of cancer. The specific aim of this study was to investigate whether frameshift mutations of the MBD4 gene and the codon 346 polymorphism were associated with microsatellite instability (MSI) and the risk for gastrointestinal cancer. We examined the MSI, frameshift mutations and polymorphisms of the MBD4 gene in 84 patients with gastric cancers, 82 colorectal cancers and 299 healthy controls. MSI was found in 19 (22.6%) and 26 (31.7%) of the gastric and colorectal cancer samples, respectively. The mutation analysis revealed no frameshift mutations in the MBD4 gene among the gastrointestinal cancers. The frequencies of genotypes: Glu/Glu, Glu/Lys and Lys/Lys were 41.7% (35/84), 41.7% (35/84) and 16.6% (14/84), respectively, in the gastric cancer cases, and 42.7% (35/82), 36.6% (30/82) and 20.7% (17/82), respectively, in the colorectal cancers. MSI was not associated with the MBD4 codon 346 polymorphism and there was no significant difference in the frequency of the genotypes between healthy controls and gastric cancer patients (P=0.2748). However, the MBD4 codon 346 polymorphism was significantly associated with the risk of colorectal cancer (P=0.0315). Our findings suggest that microsatellite instability may not be associated with frameshift mutations in the MBD4 gene, and that the MBD4 codon 346 polymorphism may play arole in colorectal cancer susceptibility in the Korean population.
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Affiliation(s)
- J H Song
- Department of Pathology, College of Medicine, The Catholic University of korea, Seoul, Korea
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Bae HJ, Song JH, Noh JH, Kim JK, Jung KH, Eun JW, Xie HJ, Ryu JC, Ahn YM, Kim SY, Lee SH, Yoo NJ, Lee JY, Park WS, Nam SW. Low frequency mutation of the Ephrin receptor A3 gene in hepatocellular carcinoma. Neoplasma 2009; 56:331-4. [PMID: 19469653 DOI: 10.4149/neo_2009_04_331] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
EphA3 is a component of the Eph/ephrin tyrosine kinase system, which participates in vasculature development. This receptor/ligand system is associated with various signaling pathways related to cell growth and viability, cytoskeletal organization, cell migration, and anti-apoptosis. Accumulated evidence suggests that aberrant regulation of EphA3 and its genetic alterations are implicated in the development and progression of various cancers. However, despite a high incidence of EphA3 over-expression, no such investigation has been performed in hepatocellular carcinoma. Thus, we investigated genetic alterations of the EphA3 gene in 73 cases of hepatocellular carcinoma by single-strand conformational polymorphism and sequencing. One novel D219V missense mutation was found in the extracellular domain of EphA3, and two genetic alterations in the intracellular sterile-alpha-motif (SAM) domain of EphA3 appeared to be polymorphisms. Although the functional assessments of this mutant are incomplete, it is believed that this novel EphA3 mutation may contribute to the development of hepatocellular carcinoma.
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Affiliation(s)
- H J Bae
- Department of Pathology, Microdissection Genomics Research Center, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Cao Z, Song JH, Park YK, Maeng EJ, Nam SW, Lee JY, Park WS. The p53 codon 72 polymorphism and susceptibility to colorectal cancer in Korean patients. Neoplasma 2009; 56:114-8. [PMID: 19239324 DOI: 10.4149/neo_2009_02_114] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
UNLABELLED TP53 is a major gene involved in the determination of proliferation or growth arrest at the cellular level. The polymorphism of p53 at codon 72 has been widely studied; this variation has been associated with cancer susceptibility and disease outcome. The specific aim of this study was to investigate whether the p53 codon 72 polymorphism is associated with individual susceptibility to colorectal cancer in Korean patients. The frequency of the polymorphism was examined in 156 patients with colorectal cancer and in 293 healthy controls. The polymorphism analysis was performed by amplifying exon 4 of p53 and digesting the products with restriction enzyme. The frequencies of genotypes: Arg/Arg, Arg/Pro and Pro/Pro were 34.6% (54/156), 43.0% (67/156) and 22.4% (35/156), respectively, in the cases with colorectal cancer, and 28.9% (114/293), 47.8% (140/293) and 13.3% (39/293), respectively, in the healthy controls. Statistically, there was a significant difference in the frequency of the genotypes when the healthy controls were compared to the patients with colorectal cancer (<em>p</em>=0.0459). The specific allele frequencies showed borderline significance (<em>p</em>=0.0502). Our findings suggest that the p53 Pro72 variant is associated with an increased risk for colorectal cancer in the Korean population. KEYWORDS p53, colorectal cancer, polymorphism, susceptibility, metastasis.
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Affiliation(s)
- Z Cao
- Department of Pathology, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Abstract
UNLABELLED The binding of the Wnt ligand to its receptor Frizzled, activates the Wnt canonical signaling pathway in carcinogenesis as well as many cellular processes, including cellular proliferation and differentiation. Wnt-2, one of 19 members of the <em>Wnt</em> gene family, is frequently overexpressed in malignant tissues. Here, in order to investigate the role of Wnt-2 in colorectal carcinogenesis, we examined the expression of the Wnt-2 protein in 120 colorectal cancers by immunohistochemistry. Wnt-2 protein was expressed in the cell membrane and cytoplasm and up-regulated in 74 (61.7%) of 120 colorectal cancers. Statistically, overexpression of Wnt-2 protein was not associated with the clinical and pathological parameters studied, including tumor location, tumor size, clinical stage, lymph node metastasis, and 5-year survival (<em>P > </em>0.05). These results indicate that up-regulation of the Wnt-2 protein might play a role in the development of colorectal cancers, as an early event of carcinogenesis. KEYWORDS Wnt-2 protein, expression, immunohistochemistry, tissue microarray, colon cancer.
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Affiliation(s)
- J K Park
- Department of Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Xie HJ, Bae HJ, Noh JH, Eun JW, Kim JK, Jung KH, Ryu JC, Ahn YM, Kim SY, Lee SH, Yoo NJ, Lee JY, Park WS, Nam SW. Mutational analysis of JAK1 gene in human hepatocellular carcinoma. Neoplasma 2009; 56:136-40. [PMID: 19239328 DOI: 10.4149/neo_2009_02_136] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
UNLABELLED The <em>Janus kinase 1</em> (JAK1) gene encodes a cytoplasmic tyrosine kinase that is noncovalently associated with a variety of cytokine receptors and plays a nonredundant role in cell proliferation, survival, and differentiation. The mutated forms of JAK1 often altered the activation of JAK1 and then changed the activation of JAK1/STAT pathways, and this may contribute to cancer development and progression. Thus, to investigate whether genetic mutations of JAK1 gene are associated in hepatocellular carcinoma (HCC) progression, we analyzed genetic alterations of JAK1 gene in 84 human HCCs by single-strand conformational polymorphism (SSCP) and direct sequencing. Of 24 exons of JAK1 gene, 12 exons were previously reported to have mutations, we searched genetic alteration of JAK1 in these exons. Overall, one missense mutation (1.2%) was found. In addition, 12 cases (14%) were found to have single nucleotide polymorphism (14%) in exon 14. Taken together, we found one novel missense mutation of JAK1 gene in hepatocellular carcinomas with some polymorphisms. Although the functional assessment of this novel mutant remains to be completed, JAK1 mutation may contribute to the tumor development in liver cancer. KEYWORDS JAK1 gene, hepatocellular carcinoma, mutation.
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Affiliation(s)
- H J Xie
- Department of Pathology, Microdisection Genomic Research Center, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Honjo T, Nam SW, Takesue H, Zhang Q, Kamada H, Nishida Y, Tadanaga O, Asobe M, Baek B, Hadfield R, Miki S, Fujiwara M, Sasaki M, Wang Z, Inoue K, Yamamoto Y. Long-distance entanglement-based quantum key distribution over optical fiber. Opt Express 2008; 16:19118-19126. [PMID: 19582004 DOI: 10.1364/oe.16.019118] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We report the first entanglement-based quantum key distribution (QKD) experiment over a 100-km optical fiber. We used superconducting single photon detectors based on NbN nanowires that provide high-speed single photon detection for the 1.5-mum telecom band, an efficient entangled photon pair source that consists of a fiber coupled periodically poled lithium niobate waveguide and ultra low loss filters, and planar lightwave circuit Mach-Zehnder interferometers (MZIs) with ultra stable operation. These characteristics enabled us to perform an entanglement-based QKD experiment over a 100-km optical fiber. In the experiment, which lasted approximately 8 hours, we successfully generated a 16 kbit sifted key with a quantum bit error rate of 6.9 % at a rate of 0.59 bits per second, from which we were able to distill a 3.9 kbit secure key.
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Affiliation(s)
- T Honjo
- NTT Basic Research Laboratories, NTT Corporation, Atsugi-shi 243-0198, Japan.
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Kim CJ, Song JH, Cho YG, Cao Z, Lee YS, Nam SW, Lee JY, Park WS. Down-regulation of ATBF1 is a major inactivating mechanism in hepatocellular carcinoma. Histopathology 2008; 52:552-9. [PMID: 18312352 DOI: 10.1111/j.1365-2559.2008.02980.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIMS alpha-Fetoprotein (AFP) is frequently detected in hepatocellular carcinomas (HCCs) and AT motif binding factor 1 (ATBF1) down-regulates AFP gene expression in hepatic cells. The ATBF1 gene also inhibits cell growth and differentiation, and altered gene expression is associated with malignant transformation. The aim was to investigate the potential role of the ATBF1 gene in HCCs. METHODS AND RESULTS Somatic mutations, allelic loss and hypermethylation of the ATBF1 gene were analysed in 76 sporadic HCCs. The level of ATBF-1 mRNA expression was analysed using quantitative real-time reverse transcriptase-polymerase chain reaction. Genetic studies of the ATBF1 gene revealed absence of somatic mutation in the hotspot region and 15 (25%) of 60 informative cases showed allelic loss at the ATBF1 locus. Hypermethylation in the intron 1 region of the ATBF1 gene was detected in only one case. Interestingly, ATBF1 mRNA expression in HCCs was significantly reduced in 55 (72.4%) samples compared with the corresponding surrounding liver tissues. Reduced expression was not statistically associated with clinicopathological parameters including stage, histological grade, infective virus type, and serum alpha-fetoprotein level. CONCLUSIONS The ATBF1 gene may contribute to the development of HCCs via transcriptional down-regulation of mRNA expression, but not by genetic or epigenetic alterations.
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Affiliation(s)
- C J Kim
- Department of Pathology, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Cho YG, Choi BJ, Song JH, Kim CJ, Cao Z, Nam SW, Lee JY, Park WS. No association of MDM2 T309G polymorphism with susceptibility to Korean gastric cancer patients. Neoplasma 2008; 55:256-260. [PMID: 18348658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Mouse double minute 2 (Mdm2) acts as a negative regulator of p53 by binding to the amino-terminus of p53. The common T309G polymorphism of Mdm2 has been the most frequently investigated, which can influence in cancer susceptibility and disease outcome. The specific aim of this study is to investigate whether the T309G polymorphism of Mdm2 was associated with individual susceptibility to gastric cancer in Korea. The frequency of the polymorphism was examined in 239 gastric cancer patients and 299 healthy controls. Polymorphism analysis was performed by amplifying the first intron of the Mdm2 and digesting with restriction enzyme and sequencing the products. The frequencies of genotypes: T/T, T/G and G/G were 26.8% (64/239), 46.0% (110/239) and 27.2% (65/239), respectively, in gastric cancer cases and 20.4% (61/299), 50.8% (152/ 299) and 28.8% (86/299), respectively, in healthy controls. Statistically, there was no significant difference in the frequency of genotype and allele between healthy control and gastric cancer patients. Finally, the polymorphism was not associated with increased risk of gastric cancer in this population. When stratified by histological subtype of gastric cancer, the risk was also not statistically significant. Our findings suggested that the T309G polymorphism of Mdm2 was not associated with an increased risk for gastric cancer in Korean population.
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Affiliation(s)
- Y G Cho
- Department of Pathology, College of Medicine, Catholic University of Korea, Seoul, Korea
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Cho YG, Lee HS, Song JH, Kim CJ, Park YK, Nam SW, Yoo NJ, Lee JY, Park WS. KLF6 IVS1 -27G/A polymorphism with susceptibility to gastric cancers in Korean. Neoplasma 2008; 55:47-50. [PMID: 18190240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
KLF6 is a key cell cycle regulator that is downregulated in several kinds of human cancers, including gastric cancer. The IVS1 -27G/A polymorphism of KLF6 has been investigated, which can influence susceptibility to gastric cancer and disease outcome. In order to investigate whether the IVS1 -27G/A polymorphism of KLF6 is associated with individual susceptibility to gastric cancer in Korea, the frequency of the polymorphism was examined in 264 gastric cancer patients and 299 healthy controls. Single nucleotide polymorphism (SNP) analysis was performed by amplifying intron 1 of KLF6 and sequencing the products. The frequencies of genotypes: G/G, G/A and A/A were 91.7% (242/264), 5.7% (15/264) and 2.6%, respectively, in gastric cancer cases and 91.9%, 7.0% and 1.1%, respectively, in healthy controls. Genotype frequencies in Korean population were very similar to those of Caucasian population. Interestingly, the male gastric cancer patients showed a significantly higher proportion of the G allele (Chi-Square test, P=0.005) compared to female gastric cancer patients. However, the polymorphism was statistically not associated with increased risk of gastric cancer in Korea. When stratified by histological subtype of gastric cancer, the risk was also not statistically significant. Thus, our results suggested that the IVS1 -27G/A polymorphism of KLF6 is not associated with an increased risk for gastric cancer in Korean population.
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Affiliation(s)
- Y G Cho
- Department of Pathology, College of Medicine, The Catholic University of Korea, Seoul, Korea
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