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Lechien JR, Chiesa‐Estomba CM, Radulesco T, Michel J, Vaira LA, Le Bon SD, Horoi M, Falanga C, Barillari MR, Hans S, Tucciarone M, Saussez S. Clinical features of patients who had two COVID-19 episodes: a European multicentre case series. J Intern Med 2021; 290:421-429. [PMID: 33527495 PMCID: PMC8013656 DOI: 10.1111/joim.13259] [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: 01/14/2021] [Accepted: 01/25/2021] [Indexed: 12/21/2022]
Abstract
OBJECTIVE To investigate the clinical features of patients who had two demonstrated coronavirus disease 2019 (COVID-19) episodes. METHODS Data of patients with both COVID-19 episodes were recruited from 22 March to 27 December 2020. The following outcomes were studied: epidemiological, comorbidities, prevalence and severity of general and otolaryngological symptom, olfactory, aroma, and gustatory dysfunctions. A comparison between first and second episodes was performed. RESULTS Forty-five patients reported having two confirmed COVID-19 episodes. The majority of patients had mild infections in both episodes. The second clinical episode was significantly similar to the first. The symptom duration of the second episode was shorter than the first. The occurrence of loss of smell was unpredictable from the first to the second episode. CONCLUSION The recurrence of COVID-19 symptoms is associated with a similar clinical picture than the first episode in patients with initial mild-to-moderate COVID episode. The pathophysiological mechanisms underlying the development of second episode remain uncertain and may involve either true reinfection or virus reactivation from sanctuaries.
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Affiliation(s)
- J. R. Lechien
- From theCOVID‐19 Task Force of the Young‐Otolaryngologists of the International Federations of Oto‐rhino‐laryngological Societies (YO‐IFOS)ParisFrance
- Department of Human Anatomy and Experimental OncologyFaculty of MedicineUMONS Research Institute for Health Sciences and TechnologyUniversity of Mons (UMons)MonsBelgium
- Department of Otolaryngology‐Head & Neck SurgeryFoch HospitalSchool of MedicineUFR Simone VeilUniversité Versailles Saint‐Quentin‐en‐Yvelines (Paris Saclay University)ParisFrance
- Department of Otorhinolaryngology and Head and Neck SurgeryCHU de BruxellesCHU Saint‐PierreSchool of MedicineUniversité Libre de BruxellesBrusselsBelgium
| | - C. M. Chiesa‐Estomba
- From theCOVID‐19 Task Force of the Young‐Otolaryngologists of the International Federations of Oto‐rhino‐laryngological Societies (YO‐IFOS)ParisFrance
- Department of Otorhinolaryngology— Head & Neck SurgeryHospital Universitario DonostiaSan SebastianSpain
| | - T. Radulesco
- From theCOVID‐19 Task Force of the Young‐Otolaryngologists of the International Federations of Oto‐rhino‐laryngological Societies (YO‐IFOS)ParisFrance
- Department of Otorhinolaryngology‐Head & Neck SurgeryAP‐HM, Hopital La ConceptionMarseilleFrance
| | - J. Michel
- From theCOVID‐19 Task Force of the Young‐Otolaryngologists of the International Federations of Oto‐rhino‐laryngological Societies (YO‐IFOS)ParisFrance
- Department of Otorhinolaryngology‐Head & Neck SurgeryAP‐HM, Hopital La ConceptionMarseilleFrance
| | - L. A. Vaira
- From theCOVID‐19 Task Force of the Young‐Otolaryngologists of the International Federations of Oto‐rhino‐laryngological Societies (YO‐IFOS)ParisFrance
- Maxillofacial Surgery UnitUniversity Hospital of SassariSassariItaly
| | - S. D. Le Bon
- From theCOVID‐19 Task Force of the Young‐Otolaryngologists of the International Federations of Oto‐rhino‐laryngological Societies (YO‐IFOS)ParisFrance
- Department of Otorhinolaryngology and Head and Neck SurgeryCHU de BruxellesCHU Saint‐PierreSchool of MedicineUniversité Libre de BruxellesBrusselsBelgium
| | - M. Horoi
- Department of Otorhinolaryngology and Head and Neck SurgeryCHU de BruxellesCHU Saint‐PierreSchool of MedicineUniversité Libre de BruxellesBrusselsBelgium
| | - C. Falanga
- From theCOVID‐19 Task Force of the Young‐Otolaryngologists of the International Federations of Oto‐rhino‐laryngological Societies (YO‐IFOS)ParisFrance
- Division of Phoniatrics and AudiologyDepartment of Mental and Physical Health and Preventive MedicineUniversity of L. VanvitelliNaplesItaly
| | - M. R. Barillari
- From theCOVID‐19 Task Force of the Young‐Otolaryngologists of the International Federations of Oto‐rhino‐laryngological Societies (YO‐IFOS)ParisFrance
- Division of Phoniatrics and AudiologyDepartment of Mental and Physical Health and Preventive MedicineUniversity of L. VanvitelliNaplesItaly
| | - S. Hans
- From theCOVID‐19 Task Force of the Young‐Otolaryngologists of the International Federations of Oto‐rhino‐laryngological Societies (YO‐IFOS)ParisFrance
- Department of Otolaryngology‐Head & Neck SurgeryFoch HospitalSchool of MedicineUFR Simone VeilUniversité Versailles Saint‐Quentin‐en‐Yvelines (Paris Saclay University)ParisFrance
| | - M. Tucciarone
- From theCOVID‐19 Task Force of the Young‐Otolaryngologists of the International Federations of Oto‐rhino‐laryngological Societies (YO‐IFOS)ParisFrance
- ENT Department Hospital Universitario de JerezJerez de la FronteraSpain
| | - S. Saussez
- From theCOVID‐19 Task Force of the Young‐Otolaryngologists of the International Federations of Oto‐rhino‐laryngological Societies (YO‐IFOS)ParisFrance
- Department of Human Anatomy and Experimental OncologyFaculty of MedicineUMONS Research Institute for Health Sciences and TechnologyUniversity of Mons (UMons)MonsBelgium
- Department of Otolaryngology‐Head & Neck SurgeryFoch HospitalSchool of MedicineUFR Simone VeilUniversité Versailles Saint‐Quentin‐en‐Yvelines (Paris Saclay University)ParisFrance
- Department of Otorhinolaryngology and Head and Neck SurgeryCHU de BruxellesCHU Saint‐PierreSchool of MedicineUniversité Libre de BruxellesBrusselsBelgium
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Abstract
Since the outbreak of Coronavirus Disease 2019 (COVID-19), loss of smell has increasingly been reported as a frequent clinical sign. Understanding the underlying mechanism and the prognostic value of this symptom will help better manage patients. SARS-CoV-2, as SARS-CoV-1, may likely spread to the central nervous system (CNS) via the olfactory nerve, a known gateway for respiratory neurotropic viruses. We hypothesise that sudden loss of smell due to COVID-19 is the consequence of a protective host defence mechanism involving apoptosis of olfactory receptor neurons. Sacrificing smelling over neuroprotection is a logical strategy, even more so as olfaction is the only sense with the ability to regenerate in adults. Induced apoptosis of olfactory neurons has been shown in mice, successfully preventing neuroinvasion. On the other hand, adult olfactory neurogenesis has been shown to be regulated in part by the immune system, allowing to restore olfactory function. Understanding anosmia as part of a defence mechanism would support the concept of sudden anosmia as being a positive prognostic factor in the short term. Also, it may orient research to investigate the risk of future neurodegenerative disease linked to persisting coronavirus in neurons.
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Affiliation(s)
- S D Le Bon
- Department of Otorhinolaryngology, St. Peter's Hospital, Brussels, Belgium.
| | - M Horoi
- Department of Otorhinolaryngology, St. Peter's Hospital, Brussels, Belgium
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Ayyad Y, Olaizola B, Mittig W, Potel G, Zelevinsky V, Horoi M, Beceiro-Novo S, Alcorta M, Andreoiu C, Ahn T, Anholm M, Atar L, Babu A, Bazin D, Bernier N, Bhattacharjee SS, Bowry M, Caballero-Folch R, Cortesi M, Dalitz C, Dunling E, Garnsworthy AB, Holl M, Kootte B, Leach KG, Randhawa JS, Saito Y, Santamaria C, Šiurytė P, Svensson CE, Umashankar R, Watwood N, Yates D. Erratum: Direct Observation of Proton Emission in ^{11}Be [Phys. Rev. Lett. 123, 082501 (2019)]. Phys Rev Lett 2020; 124:129902. [PMID: 32281850 DOI: 10.1103/physrevlett.124.129902] [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: 03/11/2020] [Accepted: 03/12/2020] [Indexed: 06/11/2023]
Abstract
This corrects the article DOI: 10.1103/PhysRevLett.123.082501.
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4
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Ayyad Y, Olaizola B, Mittig W, Potel G, Zelevinsky V, Horoi M, Beceiro-Novo S, Alcorta M, Andreoiu C, Ahn T, Anholm M, Atar L, Babu A, Bazin D, Bernier N, Bhattacharjee SS, Bowry M, Caballero-Folch R, Cortesi M, Dalitz C, Dunling E, Garnsworthy AB, Holl M, Kootte B, Leach KG, Randhawa JS, Saito Y, Santamaria C, Šiurytė P, Svensson CE, Umashankar R, Watwood N, Yates D. Direct Observation of Proton Emission in ^{11}Be. Phys Rev Lett 2019; 123:082501. [PMID: 31491233 DOI: 10.1103/physrevlett.123.082501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Indexed: 06/10/2023]
Abstract
The elusive β^{-}p^{+} decay was observed in ^{11}Be by directly measuring the emitted protons and their energy distribution for the first time with the prototype Active Target Time Projection Chamber in an experiment performed at ISAC-TRIUMF. The measured β^{-}p^{+} branching ratio is orders of magnitude larger than any previous theoretical model predicted. This can be explained by the presence of a narrow resonance in ^{11}B above the proton separation energy.
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Affiliation(s)
- Y Ayyad
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - B Olaizola
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - W Mittig
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - G Potel
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
| | - V Zelevinsky
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - M Horoi
- Department of Physics, Central Michigan University, Mount Pleasant, Michigan 48859, USA
| | - S Beceiro-Novo
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - M Alcorta
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - C Andreoiu
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - T Ahn
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - M Anholm
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - L Atar
- Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - A Babu
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - D Bazin
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - N Bernier
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - S S Bhattacharjee
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - M Bowry
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - R Caballero-Folch
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - M Cortesi
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - C Dalitz
- Niederrhein University of Applied Sciences, Institute for Pattern Recognition Reinarzstrasse 49, 47805 Krefeld, Germany
| | - E Dunling
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Department of Physics, University of York, Heslington, York YO10 5DD, United Kingdom
| | - A B Garnsworthy
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - M Holl
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Department of Astronomy and Physics, Saint Marys University, Halifax, Nova Scotia B3H 3C3, Canada
| | - B Kootte
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - K G Leach
- Department of Physics, Colorado School of Mines, Golden, Colorado 80401, USA
| | - J S Randhawa
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - Y Saito
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - C Santamaria
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - P Šiurytė
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Department of Physics, University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom
| | - C E Svensson
- Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - R Umashankar
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - N Watwood
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - D Yates
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
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Ducène C, Coolen T, Horoi M, Thill MP. Two cases of pulsatile tinnitus: Key points for the clinician. Eur Ann Otorhinolaryngol Head Neck Dis 2019; 136:S53-S55. [PMID: 30872004 DOI: 10.1016/j.anorl.2018.09.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 06/29/2018] [Accepted: 09/21/2018] [Indexed: 10/27/2022]
Abstract
INTRODUCTION Pulsatile tinnitus is a sound generated by an acoustic source from within the body, which is perceived by the auditory system of the patient. CASES SUMMARY We report two puzzling cases of pulsatile tinnitus with normal ENT examinations: the first was due to a cervical internal carotid artery dissection, and the second to the compression of the foramina of Monro by a craniopharyngioma, leading to hydrocephalus. DISCUSSION We review the systematic management and emphasize the decisive role of the ENT clinician regarding this pulsatile tinnitus complaint, because of the potentially severe complications of its underlying pathology.
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Affiliation(s)
- C Ducène
- ENT department, CHU Saint-Pierre, 322, rue Haute, 1000 Bruxelles, Belgium.
| | - T Coolen
- CUB Erasme, Radiology department, 808 route de Lennik, 1070 Bruxelles, Belgium
| | - M Horoi
- ENT department, CHU Saint-Pierre, 322, rue Haute, 1000 Bruxelles, Belgium
| | - M-P Thill
- ENT department, CHU Saint-Pierre, 322, rue Haute, 1000 Bruxelles, Belgium
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6
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Martiny D, Dauby N, Konopnicki D, Kampouridis S, Jissendi Tchofo P, Horoi M, Vlaes L, Retore P, Hallin M, Vandenberg O. MALDI-TOF MS contribution to the diagnosis of Campylobacter rectus multiple skull base and brain abscesses. New Microbes New Infect 2017; 19:83-86. [PMID: 28736616 PMCID: PMC5508623 DOI: 10.1016/j.nmni.2017.05.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [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: 01/19/2017] [Accepted: 05/22/2017] [Indexed: 01/31/2023] Open
Abstract
Campylobacter rectus is rarely associated with invasive infection. Both the isolation and the identification requirements of C. rectus are fastidious, probably contributing to an underestimation of its burden. We report the case of a 66-year-old man who developed several skull base and intracerebral abscesses after dental intervention. Campylobacter rectus was isolated from the brain biopsy. Within 45 minutes of reading the bacterial plate, the strain was accurately identified by MALDI-TOF MS. This rapid identification avoided the extra costs and delays present with 16S rRNA gene sequencing and allowed for a rapid confirmation of the adequacy of the empirical antibiotic treatment.
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Affiliation(s)
- D Martiny
- National Reference Centre for Campylobacter, Centre Hospitalier Universitaire Saint-Pierre, Université Libre de Bruxelles (ULB), Brussels, Belgium.,Faculté de Médecine et Pharmacie, Université de Mons (UMONS), Mons, Belgium
| | - N Dauby
- Department of Infectious Diseases, Brussels, Belgium
| | - D Konopnicki
- Department of Infectious Diseases, Brussels, Belgium
| | - S Kampouridis
- Department of Radiology, Centre Hospitalier Universitaire Saint-Pierre, Brussels, Belgium
| | - P Jissendi Tchofo
- Department of Radiology, Centre Hospitalier Universitaire Saint-Pierre, Brussels, Belgium
| | - M Horoi
- Department of Oto-Rhino-Laryngology, Centre Hospitalier Universitaire Saint-Pierre, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - L Vlaes
- National Reference Centre for Campylobacter, Centre Hospitalier Universitaire Saint-Pierre, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - P Retore
- National Reference Centre for Campylobacter, Centre Hospitalier Universitaire Saint-Pierre, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - M Hallin
- National Reference Centre for Campylobacter, Centre Hospitalier Universitaire Saint-Pierre, Université Libre de Bruxelles (ULB), Brussels, Belgium.,Centre for Molecular Biology, LHUB - ULB, Pôle Hospitalier Universitaire de Bruxelles, Brussels, Belgium
| | - O Vandenberg
- National Reference Centre for Campylobacter, Centre Hospitalier Universitaire Saint-Pierre, Université Libre de Bruxelles (ULB), Brussels, Belgium.,Research Centre on Environmental and Occupational Health, School of Public Health, Université Libre de Bruxelles (ULB), Brussels, Belgium
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Ostermann K, Lurquin P, Horoi M, Cotton P, Hervé V, Thill MP. Somatic tinnitus prevalence and treatment with tinnitus retraining therapy. B-ENT 2016; 12:59-65. [PMID: 27097395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023] Open
Abstract
OBJECTIVES Somatic tinnitus originates from increased activity of the dorsal cochlear nucleus, a cross-point between the somatic and auditory systems. Its activity can be modified by auditory stimulation or somatic system manipulation. Thus, sound enrichment and white noise stimulation might decrease tinnitus and associated somatic symptoms. The present uncontrolled study sought to determine somatic tinnitus prevalence among tinnitus sufferers, and to investigate whether sound therapy with counselling (tinnitus retraining therapy; TRT) may decrease tinnitus-associated somatic symptoms. METHODS To determine somatic tinnitus prevalence, 70 patients following the TRT protocol completed the Jastreboff Structured Interview (JSI) with additional questions regarding the presence and type of somatic symptoms. Among 21 somatic tinnitus patients, we further investigated the effects of TRT on tinnitus-associated facial dysesthesia. Before and after three months of TRT, tinnitus severity was evaluated using the Tinnitus Handicap Inventory (THI), and facial dysesthesia was assessed with an extended JSI-based questionnaire. RESULTS Among the evaluated tinnitus patients, 56% presented somatic tinnitus-including 51% with facial dysesthesia, 36% who could modulate tinnitus by head and neck movements, and 13% with both conditions. Self-evaluation indicated that TRT significantly improved tinnitus and facial dysesthesia in 76% of patients. Three months of TRT led to a 50% decrease in mean THI and JSI scores regarding facial dysesthesia. CONCLUSIONS Somatic tinnitus is a frequent and underestimated condition. We suggest an extension of the JSI, including specific questions regarding somatic tinnitus. TRT significantly improved tinnitus and accompanying facial dysesthesia, and could be a useful somatic tinnitus treatment.
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Thill MP, Horoi M, Ostermann K, Depuydt C, Deschamps M, Ducène C. Acute external ear lesions: clinical aspects, assessment and management. B-ENT 2016; Suppl 26:155-171. [PMID: 29461740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023] Open
Abstract
Acute external ear lesions: clinical aspects, assessment and management. We reviewed the literature concerning the assessment and the management of the external ear traumas, which is not very rich. Nevertheless, we outlined the practical attitudes in the four major conditions met: the auricular haematoma, the auricular perichondritis, the auricular laceration and auricular bums. All these pathologies must be promptly treated because there is a risk of perichondritis, which can destroy the cartilage and will result in a severely deformed ear. Auricular haematomas must be drained as soon as possible, lacerations with exposed cartilage must be stitched urgently, and burnt ears should be washed, coated with alginates (Flaminal@) and covered with a loose dressing. Antibioprophyl- axy should always be prescribed after a complete microbiological sampling.
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de Dorlodot C, Horoi M, Lefebvre P, Collet S, Bertrand B, Eloy P, Poirrier AL. French adaptation and validation of the Sino-Nasal Outcome Test-22: a prospective cohort study on quality of life among 422 subjects. Clin Otolaryngol 2015; 40:29-35. [DOI: 10.1111/coa.12315] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/07/2014] [Indexed: 11/27/2022]
Affiliation(s)
- C. de Dorlodot
- ENT Department; University Hospital of Dinant-Godinne, UCL; Yvoir Belgium
| | - M. Horoi
- ENT Department; University Hospital of Saint-Pierre, ULB; Bruxelles Belgium
| | - P. Lefebvre
- ENT Department; University Hospital of Liege; ULg Belgium
| | - S. Collet
- ENT Department; University Hospital of Dinant-Godinne, UCL; Yvoir Belgium
| | - B. Bertrand
- ENT Department; University Hospital of Dinant-Godinne, UCL; Yvoir Belgium
| | - P. Eloy
- ENT Department; University Hospital of Dinant-Godinne, UCL; Yvoir Belgium
| | - A.-L. Poirrier
- ENT Department; University Hospital of Liege; ULg Belgium
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Abstract
We decompose the neutrinoless double-β decay matrix elements into sums of products over the intermediate nucleus with two less nucleons. We find that the sum is dominated by the J(π)=0(+) ground state of this intermediate nucleus for both the light and heavy neutrino decay processes. This provides a new theoretical tool for comparing and improving nuclear structure models. It also provides the connection to two-nucleon transfer experiments.
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Affiliation(s)
- B A Brown
- Department of Physics and Astronomy and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824-1321, USA
| | - M Horoi
- Department of Physics, Central Michigan University, Mount Pleasant, Michigan 48859, USA
| | - R A Sen'kov
- Department of Physics, Central Michigan University, Mount Pleasant, Michigan 48859, USA and Department of Natural Sciences, LaGuardia Community College, The City University of New York, Long Island City, New York 11101, USA
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11
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Horoi M, Brown BA. Shell-model analysis of the 136Xe double beta decay nuclear matrix elements. Phys Rev Lett 2013; 110:222502. [PMID: 23767716 DOI: 10.1103/physrevlett.110.222502] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2012] [Revised: 03/18/2013] [Indexed: 06/02/2023]
Abstract
Neutrinoless double beta decay, if observed, could distinguish whether the neutrino is a Dirac or a Majorana particle, and it could be used to determine the absolute scale of the neutrino masses. 136Xe is one of the most promising candidates for observing this rare event. However, until recently there were no positive results for the allowed and less rare two-neutrino double beta decay mode. The small nuclear matrix element associated with the long half-life represents a challenge for nuclear structure models used for its calculation. We report a new shell-model analysis of the two-neutrino double beta decay of 136Xe, which takes into account all relevant nuclear orbitals necessary to fully describe the associated Gamow-Teller strength. We further use the new model to analyze the main contributions to the neutrinoless double beta decay matrix element, and show that they are also diminished.
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Affiliation(s)
- M Horoi
- Department of Physics, Central Michigan University, Mount Pleasant, Michigan 48859, USA.
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Thill MP, Lurquin P, Cotton P, Debaty M, Real M, Horoi M. [Somatic tinnitus (review). A consequence of plasticity and bimodal integration in the dorsal cochlear nucleus]. Rev Laryngol Otol Rhinol (Bord) 2012; 133:115-118. [PMID: 23590098] [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] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Somatic tinnitus is a peculiar tinnitus type that can be defined as a tinnitus that can be modulated in intensity and/or pitch by manipulating some regions of the head and neck but also as tinnitus associated with facial pain or dysesthesis in the same area. Those areas are innervated by the trigeminal nerve and the cervical plexus. This can be explained by functional connections between the trigeminal system and the auditory brainstem and mid-brain. A literature overview shows how different messages coming from the head and neck are able to modulate the hearing information. Tinnitus is generated by an increase of the spontaneous discharges of the dorsal cochlear nucleus neurons, tonotopic reorganisation and an increase of the neural synchronism in the auditory cortex. Trigeminal stimulations have an influence on the activity of the dorsal cochlear nucleus especially in case of an associated hearing loss.
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Affiliation(s)
- M P Thill
- CHU St Pierre, Service d'Otologie et d'Otoneurologie, 129 Blvd de Waterloo, 1000 Bruxelles, Belgique.
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Levie P, Horoi M, Claes J, Monnoye JP, Verheyden PJ, Monnoye V, Lefebvre J, Millet B, Dartevelle D, Lemaire FX, Hatert AS, de Burbure C. External or internal lateral osteotomy: why I choose the external percutaneous approach. B-ENT 2010; 6 Suppl 15:49-50. [PMID: 21305924] [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: 05/30/2023] Open
Abstract
The authors present their surgical experience with the management of patients with dorsum deformities using a precise technique: the external percutaneous approach. The indications for this technique have still not been set out very clearly in the rhinological textbooks or manuals, and so novices (and not only novices) have difficulty in understanding and applying it. We therefore try to systematise and clarify these indications in brief, together with the technical details, providing a comparison with another technique that is in very widespread use at present: the internal lateral osteotomy. Although the external percutaneous approach is not used very often--in our experience in 30% of cases only--we find the results very satisfactory and we recommend it when it is required by the anatomic conditions.
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Affiliation(s)
- P Levie
- Ste Anne-St Remi Hospital, Brussels, Belgium.
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14
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Tsang MB, Lee J, Su SC, Dai JY, Horoi M, Liu H, Lynch WG, Warren S. Survey of excited state neutron spectroscopic factors for Z=8-28 nuclei. Phys Rev Lett 2009; 102:062501. [PMID: 19257580 DOI: 10.1103/physrevlett.102.062501] [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] [Received: 10/09/2008] [Indexed: 05/27/2023]
Abstract
We have extracted 565 neutron spectroscopic factors of sd and fp shell nuclei by systematically analyzing more than 2000 measured (d, p) angular distributions. We are able to compare 125 of the extracted spectroscopic factors to values predicted by large-basis shell-model calculations and evaluate the accuracies of spectroscopic factors predicted by different shell-model interactions in these regions. We find that the spectroscopic factors predicted for most excited states of sd-shell nuclei using the latest USDA or USDB interactions agree with the experimental values. For fp shell nuclei, the inability of the current models to account for the core excitation and fragmentation of the states leads to considerable discrepancies. In particular, the agreement between data and shell-model predictions for Ni isotopes is not better than a factor of 2 using either the GXPF1A or the XT interaction.
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Affiliation(s)
- M B Tsang
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
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15
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Gour JR, Horoi M, Piecuch P, Brown BA. Coupled-cluster and configuration-interaction calculations for odd-A heavy nuclei. Phys Rev Lett 2008; 101:052501. [PMID: 18764385 DOI: 10.1103/physrevlett.101.052501] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2008] [Indexed: 05/26/2023]
Abstract
We compare coupled-cluster (CC) and configuration-interaction (CI) results for 55Ni and 57Ni obtained in the pf-shell basis, focusing on the practical equation-of-motion (EOM) CC approximations that can be applied to systems with dozens of correlated fermions. The weight of the reference state and the strength of correlation effects are controlled by the gap between the f7/2 orbit and the f5/2, p3/2, p1/2 orbits. Independent of the gap, the CC methods with up to 2p-2h components in the cluster operator and 3p-2h/3h-2p components in the EOMCC excitation operator are more accurate than the computationally more demanding CI approach with up to 3p-3h excitations and almost as accurate as the even more demanding CI approach truncated at 4p-4h excitations.
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Affiliation(s)
- J R Gour
- Department of Chemistry, Michigan State University, East Lansing, MI 48824, USA
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16
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Vaman C, Andreoiu C, Bazin D, Becerril A, Brown BA, Campbell CM, Chester A, Cook JM, Dinca DC, Gade A, Galaviz D, Glasmacher T, Hjorth-Jensen M, Horoi M, Miller D, Moeller V, Mueller WF, Schiller A, Starosta K, Stolz A, Terry JR, Volya A, Zelevinsky V, Zwahlen H. Z = 50 shell gap near 100Sn from intermediate-energy Coulomb excitations in even-mass 106-112Sn isotopes. Phys Rev Lett 2007; 99:162501. [PMID: 17995242 DOI: 10.1103/physrevlett.99.162501] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2006] [Revised: 08/01/2007] [Indexed: 05/25/2023]
Abstract
Rare isotope beams of neutron-deficient 106,108,110Sn from the fragmentation of 124Xe were employed in an intermediate-energy Coulomb excitation experiment. The measured B(E2,0(1)(+)-->2(1)(+)) values for 108Sn and 110Sn and the results obtained for the 106Sn show that the transition strengths for these nuclei are larger than predicted by current state-of-the-art shell-model calculations. This discrepancy might be explained by contributions of the protons from within the Z = 50 shell to the structure of low-energy excited states in this region.
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Affiliation(s)
- C Vaman
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
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17
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Starosta K, Dewald A, Dunomes A, Adrich P, Amthor AM, Baumann T, Bazin D, Bowen M, Brown BA, Chester A, Gade A, Galaviz D, Glasmacher T, Ginter T, Hausmann M, Horoi M, Jolie J, Melon B, Miller D, Moeller V, Norris RP, Pissulla T, Portillo M, Rother W, Shimbara Y, Stolz A, Vaman C, Voss P, Weisshaar D, Zelevinsky V. Shape and structure of N=Z 64Ge: electromagnetic transition rates from the application of the recoil distance method to a knockout reaction. Phys Rev Lett 2007; 99:042503. [PMID: 17678356 DOI: 10.1103/physrevlett.99.042503] [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: 03/13/2007] [Indexed: 05/16/2023]
Abstract
Transition rate measurements are reported for the 2(1)+ and 2(2)+ states in N=Z 64Ge. The experimental results are in excellent agreement with large-scale shell-model calculations applying the recently developed GXPF1A interactions. The measurement was done using the recoil distance method (RDM) and a unique combination of state-of-the-art instruments at the National Superconducting Cyclotron Laboratory (NSCL). States of interest were populated via an intermediate-energy single-neutron knockout reaction. RDM studies of knockout and fragmentation reaction products hold the promise of reaching far from stability and providing lifetime information for excited states in a wide range of nuclei.
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Affiliation(s)
- K Starosta
- National Superconducting Cyclotron Laboratory, Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
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18
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Horoi M, Gour JR, Włoch M, Lodriguito MD, Brown BA, Piecuch P. Coupled-cluster and configuration-interaction calculations for heavy nuclei. Phys Rev Lett 2007; 98:112501. [PMID: 17501045 DOI: 10.1103/physrevlett.98.112501] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2006] [Indexed: 05/15/2023]
Abstract
We compare coupled-cluster (CC) and configuration-interaction (CI) results for (56)Ni obtained in the pf-shell basis, focusing on practical CC approximations that can be applied to systems with dozens or hundreds of correlated fermions. The weight of the reference state and the strength of correlation effects are controlled by the gap between the f(7/2) orbit and the f(5/2), p(3/2), p(1/2) orbits. Independent of the gap, the CC method with 1p-1h and 2p-2h clusters and a noniterative treatment of 3p-3h clusters is as accurate as the more demanding CI approach truncated at the 4p-4h level.
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Affiliation(s)
- M Horoi
- Department of Physics, Central Michigan University, Mount Pleasant, Michigan 48859, USA
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19
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Campbell CM, Aoi N, Bazin D, Bowen MD, Brown BA, Cook JM, Dinca DC, Gade A, Glasmacher T, Horoi M, Kanno S, Motobayashi T, Mueller WF, Sakurai H, Starosta K, Suzuki H, Takeuchi S, Terry JR, Yoneda K, Zwahlen H. Measurement of excited states in (40)Si and evidence for weakening of the N=28 shell gap. Phys Rev Lett 2006; 97:112501. [PMID: 17025880 DOI: 10.1103/physrevlett.97.112501] [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] [Received: 06/19/2006] [Indexed: 05/12/2023]
Abstract
Excited states in (40)Si have been established by detecting gamma rays coincident with inelastic scattering and nucleon removal reactions on a liquid hydrogen target. The low excitation energy, 986(5) keV, of the 2(1)(+) state provides evidence of a weakening in the N=28 shell closure in a neutron-rich nucleus devoid of deformation-driving proton collectivity.
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Affiliation(s)
- C M Campbell
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
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20
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Abstract
We investigate the structures and magnetic properties of small Mn(n) clusters in the size range of 2-13 atoms using first-principles density functional theory. We arrive at the lowest energy structures for clusters in this size range by simultaneously optimizing the cluster geometries, total spins, and relative orientations of individual atomic moments. The results for the net magnetic moments for the optimal clusters are in good agreement with experiment. The magnetic behavior of Mn(n) clusters in the size range studied in this work ranges from ferromagnetic ordering (large net cluster moment) for the smallest (n=2, 3, and 4) clusters to a near degeneracy between ferromagnetic and antiferromagnetic solutions in the vicinity of n=5 and 6 to a clear preference for antiferromagnetic (small net cluster moment) ordering at n=7 and beyond. We study the details of this evolution and present a picture in which bonding in these clusters predominantly occurs due to a transfer of electrons from antibonding 4s levels to minority 3d levels.
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Affiliation(s)
- P Bobadova-Parvanova
- Department of Physics, Central Michigan University, Mount Pleasant, MI 48859, USA
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21
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Bobadova-Parvanova P, Jackson KA, Srinivas S, Horoi M, Köhler C, Seifert G. Scanning the potential energy surface of iron clusters: A novel search strategy. J Chem Phys 2002. [DOI: 10.1063/1.1445113] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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22
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Horoi M, Brown BA, Zelevinsky V. Random versus realistic interactions for low-lying nuclear spectra. Phys Rev Lett 2001; 87:062501. [PMID: 11497824 DOI: 10.1103/physrevlett.87.062501] [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: 01/30/2001] [Indexed: 05/23/2023]
Abstract
We compare the shell-model results for realistic interactions with those obtained for various ensembles of random matrix elements. We show that, although the quantum numbers of the ground states in the even-even nuclei have a high probability ( approximately 60%) to be J(pi)T = 0(+)0, the overlap of those states with the realistic wave functions is very small in average. The transition probabilities B(E2) predicted with random interactions are also too small. The presence of the regular pairing is shown to be a significant element of realistic physics not reproduced by random interactions.
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Affiliation(s)
- M Horoi
- Physics Department, Central Michigan University, Mount Pleasant, Michigan 48859, USA
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23
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Flores J, Horoi M, Müller M, Seligman TH. Spectral statistics of the two-body random ensemble revisited. Phys Rev E Stat Nonlin Soft Matter Phys 2001; 63:026204. [PMID: 11308555 DOI: 10.1103/physreve.63.026204] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2000] [Indexed: 05/23/2023]
Abstract
Using longer spectra we reanalyze spectral properties of the two-body random ensemble studied 30 years ago. At the center of the spectra the old results are largely confirmed, and we show that the nonergodicity is essentially due to the variance of the lowest moments of the spectra. The longer spectra allow us to test and reach the limits of validity of French's correction for the number variance. At the edge of the spectra we discuss the problems of unfolding in more detail. With a Gaussian unfolding of each spectrum the nearest-neighbor spacing distribution between ground state and first exited state is shown to be stable. Using such an unfolding the distribution tends toward a semi-Poisson distribution for longer spectra. For comparison with the nuclear table ensemble we could use such unfolding obtaining similar results as in the early papers, but an ensemble with realistic splitting gives reasonable results if we just normalize the spacings in accordance with the procedure used for the data.
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Affiliation(s)
- J Flores
- Centro de Ciencias Físicas, Campus Morelos UNAM, Apartado Postal 48-3, Código Postal 62251, Cuernavaca, Morales, Mexico
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24
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Rata I, Shvartsburg AA, Horoi M, Frauenheim T, Siu KW, Jackson KA. Single-parent evolution algorithm and the optimization of Si clusters. Phys Rev Lett 2000; 85:546-549. [PMID: 10991336 DOI: 10.1103/physrevlett.85.546] [Citation(s) in RCA: 101] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2000] [Indexed: 05/23/2023]
Abstract
We describe a novel method for the structural optimization of molecular systems. Similar to genetic algorithms (GA), our approach involves an evolving population in which new members are formed by cutting and pasting operations on existing members. Unlike previous GA's, however, the population in each generation has a single parent only. This scheme has been used to optimize Si clusters with 13-23 atoms. We have found a number of new isomers that are lower in energy than any previously reported and have properties in much better agreement with experimental data.
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Affiliation(s)
- I Rata
- Physics Department, Central Michigan University, Mount Pleasant, Michigan 48859, USA
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25
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26
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Horoi M, Brown BA. Toward a consistent description of parity nonconservation in A=18-21 nuclei. Phys Rev Lett 1995; 74:231-234. [PMID: 10058336 DOI: 10.1103/physrevlett.74.231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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27
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Horoi M. Staggering of the nuclear charge radii in a superfluid model with good particle number. Phys Rev C Nucl Phys 1994; 50:2834-2840. [PMID: 9969982 DOI: 10.1103/physrevc.50.2834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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28
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Horoi M. Parity mixed doublets in A=36 nuclei. Phys Rev C Nucl Phys 1994; 50:2392-2397. [PMID: 9969927 DOI: 10.1103/physrevc.50.2392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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29
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30
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Horoi M, Clausnitzer G, Brown BA, Warburton EK. New calculations of the parity nonconservation matrix element for the J pi T 0(+)1, 0(-)1 doublet in 14N. Phys Rev C Nucl Phys 1994; 50:775-783. [PMID: 9969718 DOI: 10.1103/physrevc.50.775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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31
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Horoi M, Clausnitzer G. Proposed new experimental case to investigate the weak parity nonconserving couplings in 20F. Phys Rev C Nucl Phys 1993; 48:R522-R525. [PMID: 9968924 DOI: 10.1103/physrevc.48.r522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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32
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Kniest N, Horoi M, Dumitrescu O, Clausnitzer G. Isovector parity mixing in 16O investigated via the 15N(p. Phys Rev C Nucl Phys 1991; 44:491-501. [PMID: 9967421 DOI: 10.1103/physrevc.44.491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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33
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Dumitrescu O, Horoi M, Cârstoiu F, Stratan G. Parity nonconserving asymmetries in resonance scattering and nuclear reactions induced by polarized protons. Phys Rev C Nucl Phys 1990; 41:1462-1469. [PMID: 9966493 DOI: 10.1103/physrevc.41.1462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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34
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Kaneko N, Kawagoe S, Horoi M. [Case of idiopathic precocious puberty showing regular menstrual cycle 8 months after birth]. Nihon Sanka Fujinka Gakkai Zasshi 1982; 34:829-832. [PMID: 7097091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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