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On the neutrality of two symmetric TSP solvers toward instance specification

Science China(Information Sciences) 2019年第11期62卷 198-200页

作者： Gloria Cerasela CRI?AN l.szl. barna iantovics l.szl. KOVáCS Faculty of Sciences Vasile Alecsandri University Faculty of Sciences and letters University of MedicinePharmacy Sciences and Technology Faculty of Mechanical Engineering and Informatics University of Miskolc

Dear editor,Currently, many computationally difficult problems can be solved using very efficient *** of these state-of-the-art methods have online implementations. The research question addressed herein is how sensit... 详细信息

关键词： On the neutrality of two symmetric TSP solvers toward instance specification

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Uncorrected refractive errors are important causes of avoidable visual impairment in Hungary: re-evaluation of two existing national data sets

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International Journal of Ophthalmology(English edition) 2023年第6期16卷 955-961页

作者： János Németh TennóDaiki Gábor l.szl.Sándor Hajnalka Keve Dorottya Szabó Gábor Tóth Gergely Dankovics István barna Hans limburg Zoltán Zsolt Nagy Department of Ophthalmology Semmelweis UniversityBudapest 1085Hungary Department of Media and Education Informatics Eötvös Loránd UniversityBudapest 1117Hungary Department of Ophthalmology Petz Aladár HospitalGyör 9024Hungary Comprehensive Health Test Program of Hungary Szentendre 2000Hungary Department of Internal Medicine and Oncology Semmelweis UniversityBudapest 1083Hungary Health Information Services Grootebroek 1613The Netherlands

·AIM: To review existing data for the prevalence of corrected, uncorrected, and inadequately corrected refractive errors and spectacle wear in Hungary.·METHODS: Data from two nationwide cross-sectional studies were analysed. The Rapid Assessment of Avoidable Blindness study collected population-based representative national data on the prevalence of visual impairment due to uncorrected refractive errors and spectacle coverage in 3523 people aged ≥50y(Group I). The Comprehensive Health Test Program of Hungary provided data on the use of spectacles in 80 290 people aged ≥18y(Group Ⅱ).·RESUlTS: In Group I, almost half of the survey population showed refractive errors for distant vision, about 10% of which were uncorrected(3.2% of all male participants and 5.0% of females). The distance spectacle coverage was 90.7%(91.9% in males;90.2% in females). The proportion of inadequate distance spectacles was found to be 33.1%. Uncorrected presbyopia was found in 15.7% of participants. In all age groups(Group Ⅱ), 65.4% of females and 56.0% of males used distance spectacles,and approximately 28.9% of these spectacles were found to be inappropriate for dioptric power(with 0.5 dioptres or more). The prevalence of inaccurate distance spectacles was significantly higher in older age groups(71y and above) in both sexes.·CONClUSION: According to this population-based data, uncorrected refractive errors are not rare in Hungary. Despite recent national initiatives, fur ther steps are required to reduce uncorrected refractive errors and associated negative effects on vision, such as avoidable visual impairment.

关键词： refractive errors uncorrected refractive errors spectacle wear inaccurate spectacles visual impairment

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Angular Differential Cross-Section for Ionization of Helium in C^6＋ Ion Collision

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Chinese Physics letters 2004年第7期21卷 1258-1261页

作者： A.C.Gagyi-Palffy I.F.barna l.Gulyas K.Tokesi DepartmentofTheoreticalPhysics UniversityofBucharestRomania Max-Planck-InstituteforPhysicsofComplexSystems NothnitzerStr.38O1187DresdenGermany InstituteofNuclearResearch HungarianAcademyofScience(ATOMKI)1-1-4001DebrecenPOBox51Hungary

With the help of the density operator, the angular differential cross-section for ionization of helium is calculated within the framework of the one-centre atomic-orbital close-coupling method. We consider a naked C6+ ion as projectile with an energy of 2.5MeV/a.u. Our result agrees well with the experimental data and the other theoretical calculations such as the first Born approximation, various Distorted Wave models and the classical trajectory Monte Carlo simulation.

关键词： Monte Carlo methods

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