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Nanoplasma resonance condition in the middle-infrared spectral range. Phys Rev E 2023; 107:055207. [PMID: 37328980 DOI: 10.1103/physreve.107.055207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 04/21/2023] [Indexed: 06/18/2023]
Abstract
The resonance-absorption condition in the laser-nanoplasma interactions has been considered to follow the wavelength dependence of the critical plasma density. We experimentally demonstrate that this assumption fails in the middle-infrared spectral range, while it is valid for visible and near-infrared wavelengths. A thorough analysis supported by molecular dynamic (MD) simulations indicates that the observed transition in the resonance condition is caused by the reduction of the electron scattering rate and the associated increase of the cluster outer-ionization contribution. An expression for the nanoplasma resonance density is derived based on experimental results and MD simulations. The findings are important for a broad range of plasma experiments and applications, since the extension of the laser-plasma interaction studies to longer wavelengths has become increasingly topical.
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Stress Distribution In A 316l(N) Steel Narrow Gap Tig Model Weld For Gen Iv Nuclear Applications. NUCLEAR MATERIALS AND ENERGY 2022. [DOI: 10.1016/j.nme.2022.101203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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3
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Probing the interplay between geometric and electronic-structure features via high-harmonic spectroscopy. J Chem Phys 2019; 150:184308. [DOI: 10.1063/1.5086036] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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4
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Wannier Representation of Intraband High-Order Harmonic Generation. PHYSICAL REVIEW LETTERS 2018; 121:143902. [PMID: 30339417 DOI: 10.1103/physrevlett.121.143902] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Indexed: 06/08/2023]
Abstract
We investigate the harmonic generation induced by the interaction of a laser field with a solid target. The harmonic spectra is composed of the contribution of two processes interpreted as interband and intraband transitions. The interband process corresponds to the recombination from an upper band, populated during the laser interaction, to a lower band. The intraband process originates from nonlinear processes of the current in individual bands. In this Letter, we develop a theory based on Wannier states and reveal in depth the underlying physics of intraband dynamics. In particular, this approach highlights the determinant role of transitions between different lattice wells. Furthermore, our approach provides quantitative predictions concerning high-order harmonic energy cutoffs, harmonic yields, and emission times.
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Prospective multicentre study on barbed reposition pharyngoplasty standing alone or as a part of multilevel surgery for sleep apnoea. Clin Otolaryngol 2017; 43:483-488. [PMID: 28981208 DOI: 10.1111/coa.13001] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/28/2017] [Indexed: 11/28/2022]
Abstract
OBJECTIVES The aim of this study was to demonstrate in a prospective multicentre study that Barbed Reposition Pharyngoplasty (BRP) procedure is safe and effective in management of obstructive sleep apnoea/hypopnea syndrome (OSAHS) patients. DESIGN Prospective study. SETTING Multicentre study. PARTICIPANTS Patients suffering from obstructive sleep apnoea. MAIN OUTCOMES MEASURES Values of postoperative apnoea-hypopnea index (AHI), oxygen desaturation index (ODI), epworth sleepiness scale (ESS). RESULTS 111 Barbed Reposition Pharyngoplasty procedures standing alone or as a part of multilevel surgery for OSAHS, performed between January and September 2016, were analysed in 15 different centres. The average hospitalisation period was 2.5 ± 0.5 days. The mean patient age was 46.3 ± 10.5 years. The average body mass index at the time of the procedure was 27.9 ± 3.2, and the majority of the patients were men (83%). The mean preoperative and postoperative apnoea/hypopnea index was 33.4 ± 19.5 and 13.5 ± 10.3, respectively (P < .001). The mean preoperative and postoperative ESS score was 10.2 ± 4.5 and 6.1 ± 3.6, respectively (P < .001). The mean preoperative and postoperative ODI were 29.6 ± 20.7 and 12.7 ± 10.8, respectively (P < .001). CONCLUSIONS Patients undergoing BRP standing alone or as part of a multilevel approach for the treatment of OSAHS have a reasonable expectation for success with minimal morbidity.
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WCLL breeding blanket design and integration for DEMO 2015: status and perspectives. FUSION ENGINEERING AND DESIGN 2017. [DOI: 10.1016/j.fusengdes.2017.03.020] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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MA 08.09 Postoperative Mobilization and Rehabilitation Requirements for Lung Cancer Patients Undergoing Minimally Invasive Surgery. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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8
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Mock-up Divertor of KTM Tokamak on the Basis of Lithium CPS. FUSION SCIENCE AND TECHNOLOGY 2017. [DOI: 10.13182/fst11-a12441] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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9
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Precise Access to the Molecular-Frame Complex Recombination Dipole through High-Harmonic Spectroscopy. PHYSICAL REVIEW LETTERS 2017; 118:033201. [PMID: 28157344 DOI: 10.1103/physrevlett.118.033201] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Indexed: 06/06/2023]
Abstract
We report on spectral intensity and group delay measurements of the highest-occupied molecular-orbital (HOMO) recombination dipole moment of N_{2} in the molecular-frame using high harmonic spectroscopy. We take advantage of the long-wavelength 1.3 μm driving laser to isolate the HOMO in the near threshold region, 19-67 eV. The precision of our group delay measurements reveals previously unseen angle-resolved spectral features associated with autoionizing resonances, and allows quantitative comparison with cutting-edge correlated 8-channel photoionization dipole moment calculations.
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S63 Postoperative pulmonary complications and physiotherapy requirements after open thoracotomy versus vats lobectomy: a propensity score-matched analysis. Thorax 2016. [DOI: 10.1136/thoraxjnl-2016-209333.69] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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11
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S61 Risk factors and short-term outcomes of developing postoperative pulmonary complications after vats lobectomy. Thorax 2016. [DOI: 10.1136/thoraxjnl-2016-209333.67] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Pedunculated polypoid melanoma. A case report of a rare spindle-cell variant of melanoma. Dermatol Online J 2015; 21:13030/qt1dk8750f. [PMID: 25933079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Accepted: 04/15/2015] [Indexed: 06/04/2023] Open
Abstract
We report an 89-year-old man who presented with a slowly growing pigmented pedunculated tumor. The nodule was diagnosed as a spindle cell pedunculated malignant melanoma (PMM), a rare variant of spindle-cell malignant melanoma. The clinical presentation of this tumor and its histological and immunohistological features are discussed.
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Pedunculated polypoid melanoma. A case report of a rare spindle-cell variant of melanoma. Dermatol Online J 2015. [DOI: 10.5070/d3214026276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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Attosecond pulse shaping around a Cooper minimum. PHYSICAL REVIEW LETTERS 2014; 112:153001. [PMID: 24785035 DOI: 10.1103/physrevlett.112.153001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2013] [Indexed: 06/03/2023]
Abstract
High harmonic generation (HHG) is used to measure the spectral phase of the recombination dipole matrix element (RDM) in argon over a broad frequency range that includes the 3p Cooper minimum (CM). The measured RDM phase agrees well with predictions based on the scattering phases and amplitudes of the interfering s- and d-channel contributions to the complementary photoionization process. The reconstructed attosecond bursts that underlie the HHG process show that the derivative of the RDM spectral phase, the group delay, does not have a straightforward interpretation as an emission time, in contrast to the usual attochirp group delay. Instead, the rapid RDM phase variation caused by the CM reshapes the attosecond bursts.
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121 Physiotherapy rehabilitation of patients following major chest wall resection: the Birmingham Heartlands experience. Lung Cancer 2014. [DOI: 10.1016/s0169-5002(14)70121-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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204 Video-assisted thoracoscopic lobectomy enhances recovery and reduces the need for physiotherapy interventions compared to open thoracotomy. Lung Cancer 2014. [DOI: 10.1016/s0169-5002(14)70204-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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A survey of physiotherapeutic provision for patients undergoing thoracic surgery in the UK. Physiotherapy 2013; 99:56-62. [DOI: 10.1016/j.physio.2011.11.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2011] [Accepted: 11/14/2011] [Indexed: 01/21/2023]
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Scaling of the low-energy structure in above-threshold ionization in the tunneling regime: theory and experiment. PHYSICAL REVIEW LETTERS 2013; 110:013001. [PMID: 23383786 DOI: 10.1103/physrevlett.110.013001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2012] [Indexed: 06/01/2023]
Abstract
A calculation of the second-order (rescattering) term in the S-matrix expansion of above-threshold ionization is presented for the case when the binding potential is the unscreened Coulomb potential. Technical problems related to the divergence of the Coulomb scattering amplitude are avoided in the theory by considering the depletion of the atomic ground state due to the applied laser field, which is well defined and does not require the introduction of a screening constant. We focus on the low-energy structure, which was observed in recent experiments with a midinfrared wavelength laser field. Both the spectra and, in particular, the observed scaling versus the Keldysh parameter and the ponderomotive energy are reproduced. The theory provides evidence that the origin of the structure lies in the long-range Coulomb interaction.
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Design of a multipurpose laboratory scale apparatus for the investigation of hydrogen isotopes in PbLi and permeation technologies. FUSION ENGINEERING AND DESIGN 2012. [DOI: 10.1016/j.fusengdes.2012.03.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Microbial contamination of non-invasive ventilation devices used by adults with cystic fibrosis. J Hosp Infect 2012; 81:104-8. [PMID: 22579442 DOI: 10.1016/j.jhin.2012.03.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Accepted: 03/09/2012] [Indexed: 10/28/2022]
Abstract
BACKGROUND There is currently little evidence regarding potential risks of bacterial contamination of non-invasive ventilation (NIV) devices used by cystic fibrosis (CF) patients. AIM The aim of this study was to determine the extent of bacterial contamination of NIV devices in our regional adult CF centre. METHODS Seven NIV devices recently used by CF patients chronically infected with Pseudomonas aeruginosa or Burkholderia cepacia complex (BCC) were swabbed in seven areas, both external and internal. Two devices had undergone ethylene oxide (EtO) sterilization between patient use and swabbing, and five devices had not undergone EtO sterilization. FINDINGS Swabs from five devices had insignificant growth of environmental organisms and two devices had significant growth of environmental organisms. No CF pathogens were isolated from any machine. CONCLUSIONS No evidence was found of pathogenic microbial contamination of NIV devices used by CF patients in this small study. We suggest that further studies examine for evidence of bacterial contamination of NIV devices and that this issue should be included in future CF infection control guidelines.
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Inelastic scattering of broadband electron wave packets driven by an intense midinfrared laser field. PHYSICAL REVIEW LETTERS 2012; 108:033002. [PMID: 22400735 DOI: 10.1103/physrevlett.108.033002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2011] [Indexed: 05/31/2023]
Abstract
Intense, 100 fs laser pulses at 3.2 and 3.6 μm are used to generate, by multiphoton ionization, broadband wave packets with up to 400 eV of kinetic energy and charge states up to Xe(+6). The multiple ionization pathways are well described by a white electron wave packet and field-free inelastic cross sections, averaged over the intensity-dependent energy distribution for (e, ne) electron impact ionization. The analysis also suggests a contribution from a 4d core excitation, or giant resonance, in xenon.
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192 Can the thoracoscore and revised cardiac risk index predict outcomes? Lung Cancer 2012. [DOI: 10.1016/s0169-5002(12)70193-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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S28 Is a pulmonary rehabilitation programme for patients undergoing curative lung cancer surgery feasible? Thorax 2011. [DOI: 10.1136/thoraxjnl-2011-201054b.28] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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P143 Exploration of patient activity levels following thoracotomy and lung resection. Thorax 2011. [DOI: 10.1136/thoraxjnl-2011-201054c.143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Regional risk assessment for contaminated sites part 1: vulnerability assessment by multicriteria decision analysis. ENVIRONMENT INTERNATIONAL 2011; 37:1295-1306. [PMID: 21723609 DOI: 10.1016/j.envint.2011.05.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2010] [Revised: 04/02/2011] [Accepted: 05/06/2011] [Indexed: 05/31/2023]
Abstract
As highlighted in the EU Soil Communication, local contamination is one of the main soil threats and it is often related to present and past industrial activities which left a legacy of a high number of contaminated sites in Europe. These contaminated sites can be harmful to many different receptors according to their sensitivity/susceptibility to contamination, and specific vulnerability evaluations are needed in order to manage this widely spread environmental issue. In this paper a novel comprehensive vulnerability assessment framework to assess regional receptor susceptibility to contaminated site is presented. The developed methodology, which combines multi criteria decision analysis (MCDA) techniques and spatial analysis, can be applied to different receptors recognized as relevant for regional assessment. In order to characterize each receptor, picked parameters significant for the estimation of the vulnerability to contaminated sites have been selected, normalized and aggregated by means of multi criteria decision analysis (MCDA) techniques. The developed MCDA methodology, based on the Choquet integral, allows to include expert judgments for the elicitation of synergic and conflicting effects between involved criteria and is applied to all the geographical objects representing the identified receptors. To test the potential of the vulnerability methodology, it has been applied to a specific case study area in the upper Silesia region of Poland where it proved to be reliable and consistent with the environmental experts' expected results. The vulnerability assessment results indicate that groundwater is the most vulnerable receptor characterized by a wide area with vulnerability scores belonging to the highest vulnerability class. As far as the other receptors are concerned, human health and surface water are characterized by quite homogeneous vulnerability scores falling in the medium-high vulnerability classes, while protected areas resulted to be the less vulnerable receptor with only one protected area falling in the medium vulnerability class. The vulnerability assessment results will support the regional risk assessment for the ranking of potentially contaminated sites at regional scale.
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240 An investigation into microbial contamination of non-invasive ventilation (NIV) devices used in adults with cystic fibrosis (CF). J Cyst Fibros 2011. [DOI: 10.1016/s1569-1993(11)60255-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Is preoperative physiotherapy/pulmonary rehabilitation beneficial in lung resection patients? Interact Cardiovasc Thorac Surg 2011; 13:300-2. [DOI: 10.1510/icvts.2010.264507] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Nonlinear atomic response to intense ultrashort x rays. PHYSICAL REVIEW LETTERS 2011; 106:083002. [PMID: 21405568 DOI: 10.1103/physrevlett.106.083002] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2010] [Indexed: 05/11/2023]
Abstract
The nonlinear absorption mechanisms of neon atoms to intense, femtosecond kilovolt x rays are investigated. The production of Ne(9+) is observed at x-ray frequencies below the Ne(8+), 1s(2) absorption edge and demonstrates a clear quadratic dependence on fluence. Theoretical analysis shows that the production is a combination of the two-photon ionization of Ne(8+) ground state and a high-order sequential process involving single-photon production and ionization of transient excited states on a time scale faster than the Auger decay. We find that the nonlinear direct two-photon ionization cross section is orders of magnitude higher than expected from previous calculations.
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Comparison of recognition tools for postoperative pulmonary complications following thoracotomy. Physiotherapy 2011; 97:278-83. [PMID: 22051583 DOI: 10.1016/j.physio.2010.11.007] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2010] [Accepted: 11/13/2010] [Indexed: 10/18/2022]
Abstract
OBJECTIVES To evaluate the recognition of postoperative pulmonary complications (PPC) following thoracotomy and lung resection using three PPC scoring tools. DESIGN Prospective observational study. SETTING Regional thoracic centre. PARTICIPANTS One hundred and twenty-nine consecutive thoracotomy and lung resection patients (October 2007 and April 2008). MAIN OUTCOME MEASURES PPC assessment was performed on a daily basis using three sets of criteria described by Brooks-Brunn, Gosselink et al. and Reeve et al.: the Brooks-Brunn Score (BBS), Gosselink Score (GS) and Melbourne Group Scale (MGS), respectively. The results were compared with treatment for PPC and clinical outcomes including mortality, postoperative length of stay and high dependency unit length of stay. RESULTS PPC frequency was 13% (17/129) with the MGS, 6% (8/129) with the GS and 40% (51/129) with the BBS. The clinically observed incidence of treated (requiring antibiotic therapy or bronchoscopy) PPC was 12% (16/129). CONCLUSION PPC treatment following thoracotomy is common. Of the three scoring tools, the MGS outperforms the BBS and the GS in terms of PPC recognition following thoracotomy and lung resection. Patients with a PPC-positive MGS score have a worse outcome as defined by mortality, high dependency unit length of stay and postoperative length of stay. The MGS is an easy-to-use multidisciplinary scoring tool, but further work is required into its use in minimally invasive surgery and in targeting high-risk groups for therapy.
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Is prophylactic minitracheostomy beneficial in high-risk patients undergoing thoracotomy and lung resection? Interact Cardiovasc Thorac Surg 2011; 12:615-8. [DOI: 10.1510/icvts.2010.255588] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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77 A multidisciplinary complex perioperative intervention to reduce complications and enhance recovery after lung resection surgery. Lung Cancer 2011. [DOI: 10.1016/s0169-5002(11)70077-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Postoperative pulmonary complications following thoracic surgery: are there any modifiable risk factors? Thorax 2010; 65:815-8. [DOI: 10.1136/thx.2009.123083] [Citation(s) in RCA: 253] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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35
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Mapping physiotherapist use of acupuncture treatment of adults with cystic fibrosis. J Cyst Fibros 2010. [DOI: 10.1016/s1569-1993(10)60295-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Experimental and computational investigation of LBE–water interaction in LIFUS 5 facility. NUCLEAR ENGINEERING AND DESIGN 2009. [DOI: 10.1016/j.nucengdes.2009.08.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Preliminary evaluation of the expected radiation damage of the bayonet IFMIF back-plate. FUSION ENGINEERING AND DESIGN 2009. [DOI: 10.1016/j.fusengdes.2008.11.103] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Approach to the lifetime assessment of the bayonet back plate for IFMIF target. FUSION ENGINEERING AND DESIGN 2009. [DOI: 10.1016/j.fusengdes.2008.11.083] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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39
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The use of NIV within a regional adult Cystic Fibrosis Centre. J Cyst Fibros 2009. [DOI: 10.1016/s1569-1993(09)60292-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Attosecond synchronization of high-order harmonics from midinfrared drivers. PHYSICAL REVIEW LETTERS 2009; 102:093002. [PMID: 19392517 DOI: 10.1103/physrevlett.102.093002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2008] [Indexed: 05/23/2023]
Abstract
The group delay dispersion, also known as the attochirp, of high-order harmonics generated in gases has been identified as the main intrinsic limitation to the duration of Fourier-synthesized attosecond pulses. Theory implies that the attochirp, which is inversely proportional to the laser wavelength, can be decreased at longer wavelength. Here we report the first measurement of the wavelength dependence of the attochirp using an all-optical, in situ method [N. Dudovich, Nature Phys. 2, 781 (2006)10.1038/nphys434]. We show that a 2 microm driving wavelength reduces the attochirp with respect to 0.8 microm at comparable intensities.
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The MEGAPIE-TEST project: Supporting research and lessons learned in first-of-a-kind spallation target technology. NUCLEAR ENGINEERING AND DESIGN 2008. [DOI: 10.1016/j.nucengdes.2007.11.006] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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43
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Evaluation of a steam generator tube rupture accident in an accelerator driven system with lead cooling. PROGRESS IN NUCLEAR ENERGY 2008. [DOI: 10.1016/j.pnucene.2007.11.018] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Is incentive spirometry effective following thoracic surgery? Interact Cardiovasc Thorac Surg 2007; 7:297-300. [DOI: 10.1510/icvts.2007.171025] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Abstract
INTRODUCTION The temporomandibular joint (TMJ) is a complex entity subjected to repeated stress with several symptoms. About one-third of people have at least one of those symptoms but only few (3 to 7%) need treatment. The aim of this retrospective study was to evaluate the results of temporomandibular joint surgery in 94 patients. PATIENTS AND METHODS Several data were used for decision-making and the surgical technique was adapted to the etiology. The type of postoperative physiotherapy performed depended on the type of pathology. RESULTS Most patients who underwent surgery between 1989 and 2004 were women (83%). The mean age was 30 years. We performed 179 surgical procedures and among them 151 Dautrey procedures. In 28 cases miniplates were used to avoid recurrences. In 57 cases postoperative physiotherapy was performed. The mean postoperative mouth opening increase was 4.7 mm (+ 23%). There was no infection or lost of plate. The mean of follow-up was about 14 months. DISCUSSION With a long follow-up and an acceptable number of patients and operations, this retrospective study demonstrated the effectiveness of the Dautrey procedure in TMJ subluxations.
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Scaling of wave-packet dynamics in an intense midinfrared field. PHYSICAL REVIEW LETTERS 2007; 98:013901. [PMID: 17358475 DOI: 10.1103/physrevlett.98.013901] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2006] [Indexed: 05/14/2023]
Abstract
A theoretical investigation is presented that examines the wavelength scaling from near-visible (0.8 micro m) to midinfrared (2 micro m) of the photoelectron distribution and high harmonics generated by a "single" atom in an intense electromagnetic field. The calculations use a numerical solution of the time-dependent Schrödinger equation (TDSE) in argon and the strong-field approximation in helium. The scaling of electron energies (lambda2), harmonic cutoff (lambda2), and attochirp (lambda -1) agree with classical mechanics, but it is found that, surprisingly, the harmonic yield follows a lambda -(5-6) scaling at constant intensity. In addition, the TDSE results reveal an unexpected contribution from higher-order returns of the rescattering electron wave packet.
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Reconstruction of attosecond pulse trains using an adiabatic phase expansion. PHYSICAL REVIEW LETTERS 2005; 95:243901. [PMID: 16384379 DOI: 10.1103/physrevlett.95.243901] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2005] [Indexed: 05/05/2023]
Abstract
We propose a new method to reconstruct the electric field of attosecond pulse trains. The phase of the high-order harmonic emission electric field is Taylor expanded around the maximum of the laser pulse envelope in the time domain and around the central harmonic in the frequency domain. Experimental measurements allow us to determine the coefficients of this expansion and to characterize the radiation with attosecond accuracy over a femtosecond time scale. The method gives access to pulse-to-pulse variations along the train, including the timing, the chirp, and the attosecond carrier envelope phase.
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Enhanced high harmonic generation from an optically prepared excited medium. PHYSICAL REVIEW LETTERS 2005; 94:113906. [PMID: 15903861 DOI: 10.1103/physrevlett.94.113906] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2004] [Indexed: 05/02/2023]
Abstract
We investigate high harmonics generated from rubidium atoms irradiated simultaneously by an intense 3.5 microm fundamental field and a weak cw diode laser. When 5p, 5d, and 4d excited states are populated through cascade excitation or deexcitation, orders-of-magnitude increases in harmonic yield as compared with the ground state are observed. It appears that, quite unexpectedly, the population accumulated in the 4d state alone is responsible for the observed enhancement.
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Optimization of attosecond pulse generation. PHYSICAL REVIEW LETTERS 2004; 93:163901. [PMID: 15524990 DOI: 10.1103/physrevlett.93.163901] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2004] [Indexed: 05/24/2023]
Abstract
The generation of attosecond pulses by superposition of high harmonics relies on their synchronization in the emission. Our experiments in the low-order, plateau, and cutoff regions of the spectrum reveal different regimes in the electron dynamics determining the synchronization quality. The shortest pulses are obtained by combining a spectral filtering of harmonics from the end of the plateau and the cutoff, and a far-field spatial filtering that selects a single electron quantum path contribution to the emission. This method applies to isolated pulses as well as pulse trains.
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