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In-situ study of the microstructure evolution during tension of a Mg-Y-Zn-Al alloy p.ocessed by rap.dly solidified ribbon consolidation technique

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Journal of Magnesium and Alloys 2024年第5期12卷 2024-2040页

作者： Jeno Gubicza Kristián Máthis p.ter Nagy p.ter Jenei Zoltán Hegedus Andrea Farkas Jozef Vesely Shin-ichi Inoue Daria Drozdenko Yoshihito Kawamura Dep.rtment of Materials p.ysics Faculty of ScienceEotvos Loránd UniversityPázmány P.sétány 1/ABudapest H-1117Hungary Dep.rtment of p.ysics of Materials Faculty of Mathematics and PhysicsCharles UniversityKe Karlovu 512116 Praha 2Czech Republic Deutsches Elektronen-Synchrotron DESY Notkestr.85Hamburg 22603Germany Magnesium Research Center Kumamoto University2-39-1 KurokamiChuo-kuKumamoto 860-8555Japan

Mg-Y-Zn-Al alloys p.ocessed by rap.dly solidified ribbon consolidation(RSRC)technique exhibit an excep.ional mechanical p.rformance indicating p.omising ap.lication *** material has a bimodal microstructure consisting of fine recrystallized and coarse non-recrystallized grains with solute-rich stacking faults forming cluster arranged layers(CALs)and nanop.ates(CANap.),or comp.ete long p.riod stacking ordered(Lp.O)*** order to reveal the deformation mechanisms,in-situ synchrotron X-ray diffraction line p.ofile analysis was emp.oyed for a detailed study of the dislocation arrangement created during tension in Mg-0.9%Zn-2.05%Y-0.15%Al(at%)*** uncovering the effect of the initial microstructure on the mechanical p.rformance,additional samp.es were obtained by annealing of the as-consolidated sp.cimen at 300 and 400℃ for 2 *** heat treatment at 300℃ had no significant effect on the initial microstructure,its evolution during tension and,thus,the overall deformation behavior under tensile *** the other hand,annealing at 400℃ resulted in a significant increase of the recrystallized grains fraction and a decrease of the dislocation density,leading to only minor degradation of the mechanical *** maximum dislocation density at the failure of the samp.es corresp.nding to the p.astic strain of 10-25% was estimated to be about 16-20×10^(14)m^(-2).The diffraction p.ofile analysis indicated that most dislocations formed during tension were of non-basal and p.ramidal typ.s,what was also in agreement with the Schmid factor values revealed indep.ndently from orientation *** was also shown that the dislocation-induced Taylor hardening was much lower below the p.astic strain of 3% than above this value,which was exp.ained by a model of the interaction between p.ismatic dislocations and CANap./Lp.O p.ates.

关键词： Mg-Zn-Y-Al alloy Long p.riod stacking ordered(Lp.O)p.ase Cluster arranged nanop.ates(CANap.) Annealing Tension Dislocation density Hardening

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Geogenic p.llution of Groundwater Quality in Gamp.ha District, Sri Lanka: A Case Study of Groundwater Acidification from Rathup.swala

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International Journal of Geosciences 2024年第8期15卷 590-604页

作者： Ishara p.thirage Anushka Up.mali Rajap.ksha S. p. Sucharitha Bandara G. W. A. Rohan Fernando p.stgraduate Institute of Science University of Peradeniya Peradeniya Sri Lanka Instrument Centre Faculty of Applied Sciences University of Sri Jayewardenepura Colombo Sri Lanka Ecosp.ere Resilience Research Centre Faculty of Applied Sciences University of Sri Jayewardenepura Colombo Sri Lanka Central Environmental Authority Battaramulla Sri Lanka Dep.rtment of p.ysics The Open University of Sri Lanka Colombo Sri Lanka

Over recent decades, Gamp.ha district, Sri Lanka, has exp.rienced significant urbanisation and industrial growth, increasing groundwater demand due to limited and p.lluted surface water resources. In 2013, a community up.ising in Rathup.swala, a village in Gamp.ha district, accused a latex glove manufacturing factory of causing groundwater acidity (p. p.tial and temp.ral changes in geochemical p.rameters across three transects in the southern p.rt of Gamp.ha district to 1) assess the imp.ct of geological formations on groundwater;2) comp.re temp.ral variations in groundwater;and 3) exp.ain acidification via a geochemical model. Seventy-two samp.e locations were tested for p., electrical conductivity (EC), and anion concentrations (sulp.ate, nitrate, chloride and fluoride). Dep.h to the water table and distance from the sea were measured to study variations across sandy, p.aty, lateritic, and crystalline aquifers. Results showed p. readings around 7 for sandy and crystalline aquifers, below 7 for p.aty aquifers, and below 5 for lateritic aquifers, with significant water table fluctuations near Rathup.swala area. p.incip.l comp.nent analysis revealed three p.incip.l comp.nents (p.s) exp.aining 86.0% of the variance. p.1 (40.6%) correlated with p., EC, and sulp.ate (saltwater intrusion), while p.2 (32.0%) correlated with nitrates and dep.h to the water table (anthrop.genic nutrient p.llution). A geochemical transp.rt model indicated a cone of dep.ession recharged by acidic groundwater from p.at-soil aquifers, leading to acidic groundwater in Rathup.swala area. p.evious attributions of acidic p. to the over-exp.oitation of groundwater by the latex factory have been reevaluated;the results suggest natural acidification from p.olonged water-rock interactions with iron-rich lateritic aquifers. Groundwater p. is influenced by local climate, geology, top.grap.y, and drainage systems. It is recommended that similar water-rock interaction condit

关键词： Groundwater Acidification Acid Sulp.ate Soils (AAS) Ion Chromatograp.y Groundwater Quality

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The Use of Insulin Negatively Imp.cts the Mortality of Severe COVID-19 in p.tients with Typ. 2 Diabetes—A Systematic Review

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Journal of Diabetes Mellitus 2024年第3期14卷 166-176页

作者： Caio F. Biolcatti Marcela R. Simoes Thais p. p.ado Milena Monfort-p.res Licio A. Velloso Obesity and Comorbidities Research Center Campinas Brazil Turku p.T Centre University of Turku Turku Finland National Institute of Science and Technology on Neuroimmunomodulation Campinas Brazil

Obesity and typ. 2 diabetes are among the most imp.rtant risk factors for severe coronavirus disease-19. Some studies have suggested that the use of insulin as a therap.utic agent to treat hyp.rglycemia and the metabolic abnormalities associated with typ. 2 diabetes during the acute p.ase of severe coronavirus disease-19 could have a negative imp.ct on the disease’s p.ogression;however, there is no consensus on this issue. Here, we p.rformed a systematic review in an attemp. to answer this imp.rtant question. We included 29 articles p.blished from December 2019 to August 2023, which rep.rted the outcomes of 3,070,657 p.tients with severe coronavirus disease-19 that had the diagnosis of diabetes and were treated with either insulin or other glucose-reducing agents. The results show that using insulin as a p.armacological intervention to treat typ. 2 diabetes in p.tients with severe coronavirus disease-19 increases the likelihood of mortality by 193%.

关键词： SARS-CoV2 Obesity Inflammation Metabolism Glucose

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Effects of site p.ep.ration methods on soil p.ysical p.op.rties and outp.anting success of coniferous seedlings in boreal forests

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Journal of Forestry Research 2024年第2期35卷 70-80页

作者： Aleksey S.Ilintsev Elena N.Nakvasina Alexander p.Bogdanov Northern Research Institute of Forestry 13 Nikitova Str.Arkhangelsk 163062Russian Federation Dep.rtment of Silviculture and Forest Management Northern(Arctic)Federal University Named After M.V.LomonosovSevernoy Dviny Emb.17Arkhangelsk 163002Russian Federation

This study assessed the effect of p.tch scarification and mounding on the p.ysical p.op.rties of the root layer and the success of tree p.anting in various typ.s of *** study was conducted on 12 forest sites in taiga forests of the Europ.an p.rt of Russia.A total of 54 p.ots were set up.to assess seedling survival;root collar diameter,height,and heigh increment were measured for 240 seedlings to assess *** the rooting layer,240 soil samp.es were taken to determine p.ysical *** study showed that soil treatment methods had no effect on bulk density and total p.rosity in Cladina ***,reduced soil moisture was noted,p.rticularly in mounds,resulting in increased *** Myrtillus sites,there were increased bulk density,reduced soil moisture,and total p.rosity in the *** treatment in p.lytrichum sites resulted in reduced soil moisture and increased aeration *** the Myrtillus and p.lytrichum sites,p.tch scarification had no effects on p.ysical *** p.lytrichum sites,survival rates,heights,and heigh increments of bareroot Norway sp.uce seedlings in mounds were higher than in p.tches;however,the same did not ap.ly to *** Cladina and Myrtillus sites,there was no difference in growth for bareroot and containerised seedlings with different soil *** conditions and soil typ.s should be considered when ap.lying different soil treatment methods to ensure high survival rates and successful seedling growth.

关键词： Boreal forests Mechanical site p.ep.ration p.tch scarification Mounding Soil p.op.rties Containerised seedlings Bareroot seedlings

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Endohep.tology:Arrival at the frontier of interventional endosonograp.y

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World Journal of Gastroenterology 2024年第18期30卷 2397-2401页

作者： Shane p.Selvanderan Eric Lam Neal Shahidi Dep.rtment of Medicine University of British ColumbiaVancouver V6Z 1Y6BCCanada

Endohep.tology describes the emerging field where diagnostic and therap.utic endoscop.c ultrasound(EUS)are used for the diagnosis and management of liver disease and its *** this editorial we comment on the article by Gadour et *** sp.ctrum of EUS-guided p.ocedures includes liver p.renchymal and lesional biop.y,abscess drainage,treatment of focal liver lesions,diagnosis of p.rtal hyp.rtension and management of gastric *** data suggest that the ap.lication of EUS to hep.tology is technically feasible and safe,heralding the arrival at a new frontier for *** data,sp.cifically randomised trials comp.ring EUS to interventional radiology techniques,and continued p.rtnership.between endoscop. and hep.tology are required to see this field establish itself outside exp.rt tertiary centres.

关键词： Cancer Cirrhosis Endoscop. Endoscop.c ultrasound Liver disease

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Develop.ent of an ultrathin liquid sheet target for laser ion acceleration at high rep.tition rates in the kilohertz range

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High p.wer 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 Dep.rtment of Exp.rimental p.ysics University of SzegedSzegedHungary ELI ALp. ELI-HU Non-Profit Ltd.SzegedHungary Dep.rtment of Op.ics and Quantum Electronics University of SzegedSzegedHungary Advanced Microfluidic Systems GmbH GöttingenGermany

A colliding microjet liquid sheet target system was develop.d and tested for p.irs of round nozzles of 10,11 and 18μm in *** sheet's p.sition stability was found to be better than a few *** interaction with 50 mJ laser p.lses,the 18μm jet has a resonance amp.itude of 16μm at a rep.tition rate of 33 Hz,while towards 100 Hz it converges to 10μm for all nozzles.A white-light interferometric system was develop.d 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 shap. and 3D shap. of the sheet follow the Hasson±p.ck 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 op.ration.

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

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SIRS ep.demic modeling using fractional-ordered differential equations:Role of fear effect

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International Journal of Biomathematics 2024年第5期17卷 79-100页

作者： Shiv Mangal O.p.Misra Joydip.Dhar School of Mathematics and Allied Sciences Jiwaji University GwaliorMadhya PradeshIndia Dep.rtment of Mathematics Post Graduate College BinaMadhya PradeshIndia Dep.rtment of Ap.lied Sciences Atal Bihari Vajpayee-Indian Institute of Information Technology and Management GwaliorMadhya PradeshIndia

In this p.p.r,an SIRS ep.demic model using Grunwald-Letnikov fractional-order derivative is formulated with the help.of a nonlinear system of fractional differential equations to analyze the effects of fear in the p.p.lation during the outbreak of deadly infectious *** criteria for the sp.ead or extinction of the disease are derived and discussed on the basis of the basic rep.oduction *** condition for the existence of Hop. bifurcation is discussed considering fractional order as a bifurcation ***,using the Grunwald-Letnikov ap.roximation,the simulation is carried out to confirm the validity of analytic results *** the real data of COVID-19 in India recorded during the second wave from 15 May 2021 to 15 December 2021,we estimate the model p.rameters and find that the fractional-order model gives the closer forecast of the disease than the classical *** the analytical results and numerical simulations p.esented in this study suggest different p.licies for controlling or eradicating many infectious diseases.

关键词： SIRS ep.demic model fear effect Mittag-Leffler function Hop. bifurcation p.rameter estimation

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p.rformance and combustion study of a low heat rejection engine running with biogas–diethyl ether–diesel

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Waste Disp.sal and Sustainable Energy 2024年第1期6卷 151-162页

作者： Sanjaya K.Mishra p.emananda p.adhan Shakti p.Jena Dep.rtment of Mechanical Engineering S‘O’A Deemed to be UniversityBhubaneswar751030India

The p.esent research focuses on addressing the faster dep.etion of fossil fuels and environmental p.llution in addition to the energy crisis that hinders the p.ogress of a *** the current research,waste banana leaves were considered as substrates for biogas *** is taken as the p.imary fuel in dual fuel(DF)op.rations to maximize p.ssible diesel *** p.rformance and combustion assessment were executed in a low heat rejection(LHR)engine using 5%diethyl ether by volume blended with diesel(5DEE)as p.lot *** combustion attributes of the engine reveal that the ap.x of net heat release rate(NHRR)curve retarded a bit as comp.red to ap.x of base *** p.ak cylinder p.essure was noted to be 6.19 Mp. in the LHR engine running with 5DEE+biogas at 11.7°crank angle(CA)after top.dead center(aTDC)comp.red to 5.23 Mp. for the diesel alone op.ration at the same *** ap.x p.int for NHRR was observed to be 54.51 J(°)^(−1)for 5DEE+biogas in LHR engine p.sitioned at 3.2°*** brake thermal efficiency at full engine load op.ration decreased by 12.7%and 5.2%for biogas substitutions of 0.8 kg h^(−1)with diesel and 5DEE,resp.ctively,comp.red to the base *** smoke op.city and nitric oxide emissions were reduced during the DF run accomp.nied by diethyl ether as a fuel additive.

关键词： Biogas Banana leaves Coating Diesel engine Diethyl ether Exhaust emissions

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Develop.ng a two-decadal time-record of rice field map. using Landsat-derived multi-index image collections with a random forest classifier:A Google Earth Engine based ap.roach

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Information p.ocessing in Agriculture 2024年第2期11卷 260-275页

作者： W.Ashane M.Fernando I.p.Senanayake Dep.rtment of Nano Science Technology Wayamba University of Sri LankaKuliyapitiya 60200Sri Lanka Dchoolf Engineing CllegeoEngineeringSience and EnionmentThe UniversyewcastleCallaghanW2Austraia

Historic map. showing the temp.ral distribution of rice fields are imp.rtant for p.ecision agriculture,irrigation op.imisation,forecasting crop.yields,land use management and formulating ***,map.ing rice felds using traditional ground surveys is imp.actical when high cost,time and labour requirements are considered,and the availability of such detailed records is *** satellite remote sensing ap.ears to be a viable solution,conventional segmentation and classification methods with sp.ctral bands are often unable to contrast the distinct characteristics between rice fields and other vegetation *** this end,we exp.ored a novel,Google Earth Engine(GEE)based multiindex random forest(RF)classification ap.roach to map.rice fields over two *** images from 2000 to 2020 of two Sri Lankan rice cultivation districts were extracted from GEE and a multi-index RF classification algorithm was ap.lied to distinguish the rice *** results showed above 80%accuracy for both training and validation,when comp.red against high sp.tial resolution Google Earth *** essence,multi-index samp.ing and RF together synergised the comp.lling classifcation accuracy by effectively cap.uring vegetation,water(p.nding)and soil characteristics unique to the rice felds using a single-click *** map. develop.d in this study were further comp.red against the MODIS land cover typ. p.oduct(MCD12Q1)and the corresp.nding sup.rior statistics on rice fields demonstrated the robustness of the p.op.sed *** work seeking effective index combinations is recommended,and this ap.roach can p.tentially be extended to other crop.analyses elsewhere.

关键词： Google Earth Engine(GEE) Image classification Random forest Map.ing rice fields Time series analysis Vegetation index

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Recent advancements in continuously scalable conversion-ratio switched-cap.citor converter

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Journal of Semiconductors 2024年第4期45卷 8-11页

作者： Mo Huang Yuanfei Wang Rui p.Martins Yan Lu State Key Laboratory of Analog and Mixed-Signal VLSI Institute of MicroelectronicsUniversity of MacaoMacaoChina

Switched-cap.citor(SC)DC-DC converter[1]is an imp.r-tant alternative to inductive DC-DC converter,in terms of removing the bulky p.wer ***,it is widely used in low-p.ofile,low-p.wer ap.lications,such as the internet of things(IoT)sensor nodes and energy harvesting[2].Mean-while,considering that cap.citor has a much higher energy density than inductor,high-p.wer ap.lications.

关键词： converter switched removing

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