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Development of an ultrathin liquid sheet target for laser ion acceleration at high repetition rates in the kilohertz range

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High Power Laser science and Engineering 2024年第3期12卷 134-145页

作者： M.Füle A.P.Kovács T.Gilinger M.Karnok P.gaál s.Figul G.Marowsky K.Osvay National Laser-initiated Transmutation Laboratory University of SzegedSzegedHungary Department of Experimental Physics University of SzegedSzegedHungary ELI ALPs ELI-HU Non-Profit Ltd.SzegedHungary Department of Optics and Quantum Electronics University of SzegedSzegedHungary Advanced Microfluidic systems GmbH GöttingenGermany

A colliding microjet liquid sheet target system was developed and tested for pairs of round nozzles of 10,11 and 18μm in *** sheet's position stability was found to be better than a few *** interaction with 50 mJ laser pulses,the 18μm jet has a resonance amplitude of 16μm at a repetition rate of 33 Hz,while towards 100 Hz it converges to 10μm for all nozzles.A white-light interferometric system was developed to measure the liquid sheet thickness in the target chamber both in air and in vacuum,with a measurement range of 182 nm±1μm and an accuracy of±3%.The overall shape and 3D shape of the sheet follow the Hasson±Peck model in *** vacuum versus air,the sheet gradually loses 10%of its thickness,so the thinnest sheet achieved was below 200 nm at a vacuum level of 10±4mbar,and remained stable for several hours of operation.

关键词： diagnostics laser ion acceleration nanometric liquid sheet targets vacuum test

The first record of a Konservat-Lagerstätten in which early post-settlement stages of fossil archaeobalanids(Cirripedia:Balanomorpha)are preserved

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Integrative Zoology 2024年第2期19卷 200-223页

作者： Tomáš KOCÍ Rok gaŠpaRIC John BUCKERIDGE Martina KOCOVÁ VEsELsKÁ Aleš ŠOsTER Ivancická581 PragueCzech Republic palaeontological Department Natural History MuseumNational MuseumPragueCzech Republic Oertijdmuseum Bosscheweg 80Boxtel5293 WBThe Netherlands Institute for palaeobiology and Evolution Novi TrgKamnikSlovenia Earth and Oceanic systems Group RMIT UniversityMelbourneAustralia Museums Victoria CarltonVictoriaAustralia Department of paleobiology and paleoecology Institute of Geology of the Czech Academy of SciencesPragueCzech Republic Institute of Geology and palaeontology Charles UniversityPragueCzech Republic Faculty of Natural sciences and Engineering University of LjubljanaLjubljanaSlovenia

A diverse sessile barnacle fauna from a Miocene shallow-water deposit at Dolnja stara vas in slovenia is *** includes the first descriptions of early post settlement juveniles of Actinobalanus sloveniensis attached to mangrove *** represent three distinct growth phases,the earliest being interpreted as being less than 24 h post settlement,the others being 1 to 2 days post *** assessment of their taphonomy is *** adult balanomorphs are attached to a variety of organic substrates,including mangrove leaves and branches,fragments of the conifers?Taxodioxylon,Carapoxylon,pine cones,molluscs,and cetacean *** barnacles include ***,Amphibalanus venustus,and Perforatus perforatus—many with opercula retained within the *** retains some of the original shell *** is the second record of barnacle–plant associations from the Central paratethys from Kamnik and *** paleoecology and paleogeography of the site are discussed.

关键词： acorn barnacles barnacle metamorphosis epibiont paleoecology taxonomy

sPEED:an integrated,smartphone-operated,handheld digital PCR Device for point-of-care testing

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Microsystems & Nanoengineering 2024年第3期10卷 149-158页

作者： Haoqing Zhang Xiaocheng Liu Xinlu Wang Zhiqiang Yan Ying Xu Martina gaňová TomášŘezníček Marie Korabečná pavel Neuzil Ministry of Education Key Laboratory of Micro and Nano systems for Aerospace School of Mechanical EngineeringNorthwestern Polytechnical University127 West Youyi RoadXi’anShaanxi 710072PR China The Key Laboratory of Biomedical Information Engineering of the Ministry of Education School of Life Science and TechnologyXi’an Jiaotong UniversityXi’anShaanxi 710049PR China Bioinspired Engineering and Biomechanics Center(BEBC) Xi’an Jiaotong UniversityXi’an 710049PR China school of Marine science and Technology Northwestern Polytechnical UniversityXi’anShaanxi 710072PR China Central European Institute of Technology Brno University of TechnologyPurkyňova 12361300 BrnoCzech Republic ITD Tech s.R.O Osvoboditelu100573581 BohumínCzech Republic Institute of Biology and Medical Genetics First Faculty of MedicineCharles University and General University Hospital of PragueAlbertov 412800 PragueCzech Republic

This study elaborates on the design,fabrication,and data analysis details of sPEED,a recently proposed smartphonebased digital polymerase chain reaction(dPCR)*** dPCR chips incorporate partition diameters ranging from 50μm to 5μm,and these partitions are organized into six distinct blocks to facilitate image *** to the superior thermal conductivity of si and its potential for mass production,the dPCR chips were fabricated on a si substrate.A temperature control system based on a high-power density Peltier element and a preheating/cooling PCR protocol user interface shortening the thermal cycle *** optical design employs four 470 nm light-emitting diodes as light sources,with filters and mirrors effectively managing the light emitted during *** algorithm is utilized for image processing and illumination nonuniformity correction including conversion to a monochromatic format,partition identification,skew correction,and the generation of an image correction *** validated the device using a range of deoxyribonucleic acid targets,demonstrating its potential applicability across multiple ***,we provide guidance and verification of the design and testing of the recently proposed sPEED device.

关键词： correction smart testing

Macroangiopathic Complications and Associated Factors in Type 2 Diabetics at CNHU-HKM

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Journal of Diabetes Mellitus 2024年第1期14卷 13-19页

作者： Annelie Kerekou Hode Hubert Dedjan gaëtan Ayina Endocrinology Metabolism and Nutrition Department CNHU-HKM Cotonou Benin Department of Medicine and Medical specialties CHUD-OP Porto-Novo Benin

Nowadays, chronic clinical manifestations of diabetemellitus constitute an important disease and a huge public health issue. Aim: study the macroangiopathic complications in type 2 diabetics. Method: It is a descriptive cross-sectional study with an analytical aim covering the period from January 2019 to December 31, 2021 in the Endocrinology, Metabolism and Nutrition clinic of the National Teaching Hospital Hubert Koutoukou Maga (CNHU-HKM) We thus identified 150 type 2 diabetic patients. Results: The prevalence of macroangiopathy was 60% with 11.3% for stroke, 28.6% for acute coronary syndrom, 4% for cervical macroangiopathy, and 46.97% ± 25.36% for obliterating arteriopathy of the lower limbs (OALL). The mean age of the patients was 57.69 ± 1.77 years with a sex ratio 1. The duration of diabetes progression was greater than 10 years for more than half of the patients 52.6%. The main associated cardiovascular risk factors were arterial high blood pressure (64.7%), family history of diabetes (33.7%), obesity with 20.0%. The death rate was 7.3%. Conclusion: Macroangiopathy’s mortality rate of in type 2 diabetics is high. Prevention remains the best treatment and involves screening for factors associated with macroangiopathy.

关键词： Type 2 Diabetes Macroangiopathy Coronary Artery Disease stroke Peripheral Arterial Disease

Long-Term Impact of Acute Retinoic Acid supplementation at the Young Age on Testicular Architecture of Wistar Albino Rats

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Advances in Reproductive sciences 2024年第1期12卷 1-13页

作者： Mama sy Racha Kamenda Ibondou Fatoumata Bah Robert Foko Ndiaga Diop Mame Vénus Abdoulaye séga Cheikh Diop Mamadou Fall Oumar Faye Laboratory of Histology Embryology and Cytogenetics Faculty of Medecine Cheikh Anta Diop University Dakar Senegal

Introduction: Inappropriate and excess vitamin supplementation, particularly for vitamin A, is increasingly recognized as a public health problem in developed countries. On the other hand, blind supplementation of vitamin A, for children in developing countries is a subject of controversy in the literature. The crucial role of vitamin A in the process of spermatogenesis in adult rodents is well established, but only a few publications are consecrated to the long-term effect of vitamin A intake at a young age on testicular development and differentiation. Objectives: Our study aimed to evaluate the long-term effects of acute supplementation at an early age, in the post-natal period, on spermatogenesis and testicular trophicity at adult age. Material and Methods: Young Wistar Albinos rats of 22 days received an acute high dose of supplementation of vitamin A (retinyl palmitate). The control group, group 1, received only extra virgin olive oil, Group 2 a dose of 7000 IU/kg of retinyl palmitate, group 3, 14,000 IU/kg, and Group 4 a dose of 28,000 IU/kg. At 10 weeks of age, the testes’ testosterone levels were measured by ELIsA. For histological assessment, sections were stained with Hematoxylin eosin, and the Johnsen score was used to evaluate spermatogenesis in the seminiferous tubules. Results: The average testicular weights of rats were significantly lower in group 4 (p so was the testosterone level in the testis compared to the control group (p .01). Most of the seminiferous tubules were concerned by an arrest of spermatogenesis and the Johnsen score was decreased with a mean score of 5.96 ± 1.60 (p .001) in that Group. In Group 3, Johnsen’s score was significantly better than the one obtained with the control. Conclusion: We observed a negative effect in the long term with a high acute dose of supplementation of retinyl palmitate at a young age, on testicular development and differentiation. Despite a return to normal diet after that supplementation, d

关键词： Vitamin A Retinyl palmitate spermatogenesis Testis-Wistar Albino Rats

Machine learning-enhanced Monte Carlo and subset simulations for advanced risk assessment in transportation infrastructure

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Journal of Mountain science 2024年第2期21卷 690-717页

作者： Furquan AHMAD Pijush sAMUI s.s.MIsHRA Department of Civil Engineering National Institute of TechnologyPatna 800006India

The maintenance of safety and dependability in rail and road embankments is of utmost importance in order to facilitate the smooth operation of transportation *** study introduces a comprehensive methodology for soil slope stability evaluation,employing Monte Carlo simulation(MCs)and subset simulation(ss)with the"UPss 3.0 Add-in"in *** on an 11.693-meter embankment with a soil slope(inclination ratio of 2H:1V),the investigation considers earthquake coefficients(kh)and pore water pressure ratios(ru)following Indian zoning *** chance of slope failure showed a considerable increase as the Coefficient of Variation(COV),seismic coefficients(kh),and pore water pressure ratios(ru)experienced an *** ss approach showed exceptional efficacy in calculating odds of failure that are notably *** computational modeling,the study optimized the worst-case scenario using ANFIs-ga,ANFIs-GWO,ANFIs-PsO,and ANFIs-BBO *** ANFIs-PsO model exhibits exceptional accuracy(training R2=0.9011,RMsE=0.0549;testing R2=0.8968,RMsE=0.0615),emerging as the most *** study highlights the significance of conducting thorough risk assessments and offers practical insights into evaluating and improving the stability of soil slopes in transportation *** findings contribute to the enhancement of safety and reliability in real-world situations.

关键词： Monte Carlo simulation subset simulation Machine Learning seismic coefficient

Accidental Ingestion of Nitric Acid in an Agricultural Company: A Case study and Literature Review

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Occupational Diseases and Environmental Medicine 2024年第1期12卷 21-27页

作者： Asséga sylvain sagna Mame Thioro Aïssatou Fall Mossane Dominique Ndour sidy Diallo société de Cultures Légumières (sCL) Saint-Louis Sénégal West Africa Farms (WAF) Yamane Louga Sénégal International Committee of The Red Cross Dakar Sénégal saint-Louis Regional Hospital Center Saint-Louis Sénégal

Introduction: Though common in society, caustic accidental ingestion is rare in the agricultural industry. This study describes a case of ingestion of nitric acid used as an agricultural fertilizer by an ordinary worker at the société de Cultures Légumières. Clinical Case: This is a 33-year-old unschooled woman who ingested a sip of nitric acid from an abandoned labelled acid canister near a farming plot of land. she showed a burn of the oral cavity with a bleeding tablecloth and an intense retrosternal pain. The duodenal oesophagus fibroscopy screening that was carried out 18 hours after the accident, revealed an esophagitis class 2b. The tests revealed no anomalies. Fifteen (15) days after the accident, the FOGD was normal. Following an 8-month-follow up, no signs of stenosis or degeneration were noted. Conclusion: The accidental ingestion of nitric acid is rare in adult. Its treatment is mainly symptomatic and aims at preserving vital functions without directly fighting the ingested substance off. The right actions must be integrated into the 15-minute Health and safety awarenesssessions for optimum pre-hospital management. The hospital evaluation is mandatory and is carried out thanks to the digestive endoscopy, which is still relevant in this indication, but is completed by the thoraco-abdominal CT. The latter is very sensitive the transmural necrosis diagnosis.

关键词： Accident Agriculture Caustic Fibroscopy senegal

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囊玛艺术新论

西藏研究 2024年第3期 66-76,M0005,M0006页

作者：觉嘎洛金宝西藏大学艺术学院拉萨850000

囊玛是一种集歌、舞、乐为一体的西藏传统表演艺术,而囊玛吉度是以囊玛艺术的实践为主要业务的行会组织。作为群众自发形成的社团组织,囊玛吉度形成背景和艺人来源具有多元化,其使用的乐器和表演的典目具有多样性。囊玛的表现内容主要... 详细信息

囊玛是一种集歌、舞、乐为一体的西藏传统表演艺术,而囊玛吉度是以囊玛艺术的实践为主要业务的行会组织。作为群众自发形成的社团组织,囊玛吉度形成背景和艺人来源具有多元化,其使用的乐器和表演的典目具有多样性。囊玛的表现内容主要包括爱情、时事、祈愿、赞颂、讽刺等内容,大多与不同时期的社会生活、观念意识等关联密切。在囊玛曲目中,有部分歌词采用了仓央嘉措的诗作,汉文关联表达和双关语也得到了广泛运用。

关键词：传统音乐囊玛囊玛吉度曲目

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卜形岔管水压试验结构受力分析

水电站机电技术 2024年第9期47卷 82-84,169页

作者：原嘎嘎中国水利水电第十四工程局有限公司云南昆明650041

针对某水电站工程项目岔管打压过程中出现的Vonmises等效应力值过高的问题,通过solidWorks软件进行建模,导入ANsYs软件进行网格化有限元模拟打压工况分析,分析了岔管在施加1Mpa、2Mpa、3Mpa压力下的应力应变情况,并与实际打压数据作对比... 详细信息

针对某水电站工程项目岔管打压过程中出现的Vonmises等效应力值过高的问题,通过solidWorks软件进行建模,导入ANsYs软件进行网格化有限元模拟打压工况分析,分析了岔管在施加1Mpa、2Mpa、3Mpa压力下的应力应变情况,并与实际打压数据作对比,最终得出了钢岔管在加强肋与圆钢交接处产生应力集中现象。计算结果与实际水压试验发生应力偏高位置吻合且计算数值与实际数值存在偏差较小,数据基本吻合。因此该岔管不满足设计压力值4.68Mpa水压试验无法达到设计要求压力值5.85Mpa。最终得出结论:需对岔管进行补强设计。

关键词：水压试验壳单元 Vonmises等效应力屈服强度泊松比弹性模量