检索结果-南通市图书馆

Analysis of strong decays of sU(3)partners ofΩ(2012)baryon

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2024年第8期48卷 34-41页

作者： t.M.Aliev s.Bilmis M.savci Department of Physics Middle East Technical UniversityAnkara 06800Turkey tUBItAK ULAKBIM Ankara 06510Turkey

We estimate the coupling constants and decay widths of the sU(3)partners of theΩ(2012)hyperon,as discovered by the BELLE Collaboration,using the distribution amplitudes of the octet baryons within the light cone sum rules *** study includes a comparison of the obtained results for the relevant decay widths with those derived within the framework of the flavor sU(3)*** observe a good agreement between the predictions of both ***,our result on the decay width ofΩ→ΞK is compatible with the existing experimental result within the uncertainties of the model *** results can provide helpful insights for determining the nature of the sU(3)partners of theΩ(2012)baryon.

关键词： coupling constants light cone sum rule hyperon

Optically levitated micro gyroscopes with an MHz rotational vaterite rotor

在线全文

学校读者我要写书评

暂无评论

Microsystems & Nanoengineering 2024年第3期10卷 219-227页

作者： Kai Zeng Xiangming Xu Yulie wu Xuezhong wu Dingbang Xiao College of Intelligence science and technology National University of Defense TechnologyChangsha 410073China College of Information and Communication National University of Defense TechnologyWuhan 430000China Key Laboratory of satellite Navigation technology National University of Defense TechnologyChangsha 410073China

the field of levitated optomechanics has experienced significant advancements in manipulating the translational and rotational dynamics of optically levitated particles and exploring their sensing *** concept of using optically levitated particles as gyroscopes to measure angular motion has long been explored but has not yet been proven either theoretically or *** this study,we present the first rotor gyroscope based on optically levitated high-speed rotating *** gyroscope is composed of a micrometer-size ellipsoidal vaterite particle that is driven to rotate at MHz frequencies in a vacuum *** an external angular velocity is input,the optical axis deviates from its initial position,resulting in changes in the frequency and amplitude of the rotational *** analyzing these changes,the angular velocity of the input can be accurately detected,making it the smallest rotor gyroscope in the *** angular rate bias instability of the gyroscope is measured to be 0.08°/s and can be further improved to as low as 10^(−9)°/h theoretically by cooling the motion and increasing the angular moment of the levitated *** work opens a new application paradigm for levitated optomechanical systems and may pave the way for the development of quantum rotor gyroscopes.

关键词： particles rotational angular

Genetics of Gallstone Disease and their Clinical significance: A Narrative Review

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Clinical and translational Hepatology 2024年第3期12卷 316-326页

作者： Christopher J.Costa Minh thu t.Nguyen Haleh Vaziri George Y.wu Department of Medicine University of Connecticut Health CenterFarmingtonCTUSA Division of Gastroenterology and Hepatology University of Connecticut Health CenterFarmingtonCTUSA

Gallstone(Gs)disease is common and arises from a combination of genetic and environmental *** genetic abnormalities specifically leading to cholesterol Gss are rare,there are clinically significant gene variants associated with cholesterol *** contrast,most bilirubin Gss can be attributed to genetic *** pathogenesis of cholesterol and bilirubin Gss differs *** Gss are notably influenced by genetic variants within the ABC protein superfamily,including ABCG8,ABCG5,ABCB4,and ABCB11,as well as genes from the apolipoprotein family such as ApoB100 and ApoE(especially the E3/E3 and E3/E4 variants),and members of the MUC ***,bilirubin Gss are associated with genetic variants in highly expressed hepatic genes,notably UGt1A1,ABCC2(MRP2),ABCC3(MRP3),CFtR,and MUC,alongside genetic defects linked to hemolytic anemias and conditions impacting *** genetic cases constitute a small portion of Gs disease,recognizing genetic predisposition is essential for proper diagnosis,treatment,and genetic counseling.

关键词： Gallstones Cholelithiasis AtP-binding cassette transporters ABCG8 protein Human UDP-glucuronosyltransferase A1

Assessment of challenges and strategies for driving energy transitions in emerging markets:A socio-technological systems perspective

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Energy Geoscience 2024年第2期5卷 81-100页

作者： Nelson s.Chipangamate Glen t.Nwaila Wits Mining Institute University of the Witwatersrand1 Jan Smuts Ave.Johannesburg2000South Africa school of Geosciences University of the WitwatersrandPrivate Bag 3Wits2050South Africa

the pursuit of improved quality of life standards has significantly influenced the contemporary mining model in the 21st *** era is witnessing an unprecedented transformation driven by pressing concerns related to sustainability,climate change,the just energy transition,dynamic operating environments,and complex social *** transitions present both opportunities and *** aim of this study is to provide an extensive literature review on energy transition to identify the challenges and strategies associated with navigating transformations in energy *** these transformations is particularly critical in the face of the severe consequences of global warming,where an accelerated energy transition is viewed as a universal *** a socio-technological systems perspective,specifically through the application of Actor Network theory(ANt),this research provides a theoretical foundation while categorising challenges into five distinct domains and outlining strategies across these different *** insights are specifically tailored for emerging market countries to effectively navigate energy transition while fostering the development of resilient ***,our findings highlight that energy transition encompasses more than a mere technological shift;it entails fundamental changes in various systemic socio-economic *** focusing on the role of social structures in transitions,this study makes a significant and innovative contribution to ANt,which has historically been criticised for its limited acknowledgement of social ***,we propose an emerging market energy transition framework,which not only addresses technological aspects,but also integrates social *** framework paves the way for future research and exploration of energy transition *** outcomes of this study offer valuable insights to policymakers,researchers,and practitioners engaged in t

关键词： Actor network theory Energy transition social innovation technology Actor inclusive policy

superplasticity of fine-grained Mg-10Li alloy prepared by severe plastic deformation and understanding its deformation mechanisms

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2024年第1期12卷 316-331页

作者： H.t.Jeong s.W.Lee W.J.Kim Department of Materials science and Engineering Hongik UniversityMapo-guSangsu-dong 72-1Seoul 121-791Republic of Korea

the superplastic behavior and associated deformation mechanisms of a fine-grained Mg-10.1 Li-0.8Al-0.6Zn alloy(LAZ1011)with a grain size of 3.2μm,primarily composed of the BCCβphase and a small amount of the HCPαphase,were examined in a temperature range of 473 K to 623 *** microstructural refinement of this alloy was achieved by employing high-ratio differential speed *** best superplasticity was achieved at 523 K and at strain rates of 10^(-4)-5×10^(-4)s^(-1),where tensile elongations of 550±600%were *** the heating and holding stage of the tensile samples prior to tensile loading,a significant increase in grain size was observed at temperatures above 573 ***,it was important to consider this effect when analyzing and understanding the superplastic deformation behavior and *** the investigated strain rate range,the superplastic flow at low strain rates was governed by lattice diffusion-controlled grain boundary sliding,while at high strain rates,lattice diffusion-controlled dislocation climb creep was the rate-controlling deformation *** was concluded that solute drag creep is unlikely to *** the late stages of deformation at 523 K,it was observed that grain boundary sliding led to the agglomeration of theαphase,resulting in significant strain *** mechanism maps were constructed forβ-Mg-Li alloys in the form of 2D and 3D formats as a function of strain rate,stress,temperature,and grain size,using the constitutive equations for various deformation mechanisms derived based on the data of the current tests.

关键词： Magnesium-lithium alloy superplasticity severe plastic deformation Grain size Grain growth

Efficient guiding and focusing of intense laser pulse using periodic thin slits

在线全文

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2024年第4期9卷 29-39页

作者： L.Xu t.W.Huang K.Jiang C.N.wu H.Peng P.C.hen R.Li H.B.Zhuo C.t.Zhou shenzhen Key Laboratory of Ultraintense Laser and Advanced Material technology Center for Intense Laser ApplicationTechnologyand College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118People’s Republic of China

slits have been widely used in laser-plasma interactions as plasma optical components for generating high-harmonic light and controlling laser-driven particle ***,we propose and demonstrate that periodic thin slits can be regarded as a new breed of optical elements for efficient focusing and guiding of intense laser *** fundamental physics of intense laser interaction with thin slits is studied,and it is revealed that relativistic effects can lead to enhanced laser focusing far beyond the pure diffractive focusing *** addition,the interaction of an intense laser pulse with periodic thin slits makes it feasible to achieve multifold enhancement in both laser intensity and energy transfer efficiency compared with conventional *** results provide a novel method for manipulating ultra-intense laser pulses and should be of interest for many laser-based applications.

关键词： laser pulse intense

sleep-based neuronal oscillations as a physiological biomarker for Alzheimer's disease:is night time the right time?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2024年第7期19卷 1417-1418页

作者： Jonathan Witton Erica s.Brady Michael t.Craig Department of Clinical and Biomedical sciences Faculty of Health and Life SciencesUniversity of ExeterExeterEnglandUK Gladstone Institute for Neurological Disease San FranciscoCAUSA school of Psychology and Neuroscience College of MedicalVeterinary and Life SciencesUniversity of GlasgowGlasgowScotlandUK

Dementia is a devastating syndrome characterized by memory problems,confusion,and behavior changes that prevent people from performing everyday *** is the leading cause of dependency and disability amongst older people,resulting in a global economic cost of ~$1.3 *** 58 million people are currently afflicted by dementia worldwide,with Alzheimer s disease(AD) causing most(60-70%) of these cases.

关键词： Alzheimer everyday performing

Cobalt doping amount determines dominant reactive species in peroxymonosulfate activation via porous carbon catalysts co-doped by cobalt and nitrogen

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental sciences 2024年第4期138卷 212-226页

作者： Xiang Li Limeng wu Aiqin Zhang shaohua wu Yan Lin Chunping Yang Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong UniversityNanchang 330063China Academy of Environmental and Resource sciences School of Environmental Science and EngineeringGuangdong University of Petrochemical TechnologyMaoming 525000China College of Environmental science and Engineering Hunan University and Key Laboratory of Environmental Biology and Pollution Control(Hunan University)Ministry of EducationChangsha 410082China

switching the reaction routes in peroxymonosulfate(PMs)-based advanced oxidation processes have attracted much attention but remain ***,a series of Co-N/C catalysts with different compositions and structures were prepared by using bimetallic zeolitic imidazolate frameworks based on ZIF-8 and ZIF-67(x Zn/Co-ZIFs).Results show that Co doping amount could mediate the transformation of the activation pathway of PMs over CoN/*** Co doping amount was less than 10%,the constructed x Co-N/C/PMs system(x≤10%)was singlet oxygen-dominated reaction;however further increasing Co doping amount would lead to the generation and coexistence of sulfate radicals and high-valent cobalt,besides singlet ***,the nitrogen-coordinated Co(Co-NX)sites could serve as main catalytically active sites to generate singlet *** excess Co doping amount caused the formation of Co nanoparticles from which leached Co ions were responsible for the generation of sulfate radicals and high-valent *** to undoped N/C,Co doping could significantly enhance the catalytic *** 0.5%Co-N/C could achieve the optimum degradation(0.488 min^(-1))and mineralization abilities(78.4%)of sulfamethoxazole among the investigated Co-N/C catalysts,which was superior to most of previously reported *** addition,the application prospects of the two systems in different environmental scenarios(pH,inorganic anions and natural organic matter)were assessed and showed different degradation *** study provides a strategy to regulate the reactive species in PMs-based advanced oxidation process.

关键词： Peroxymonosulfate sulfate radical singlet oxygen Cobalt Zeolitic imidazolate framework Advanced oxidation process

the physiological role of the unfolded protein response in the nervous system

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2024年第11期19卷 2411-2420页

作者： shuangchan wu Wensheng Lin Department of Neuroscience University of MinnesotaMinneapolisMNUSA Institute for translational Neuroscience University of MinnesotaMinneapolisMNUSA

the unfolded protein response(UPR)is a cellular stress response pathway activated when the endoplasmic reticulum,a crucial organelle for protein folding and modification,encounters an accumulation of unfolded or misfolded *** UPR aims to restore endoplasmic reticulum homeostasis by enhancing protein folding capacity,reducing protein biosynthesis,and promoting protein *** also plays a pivotal role in coordinating signaling cascades to determine cell fate and function in response to endoplasmic reticulum *** research has highlighted the significance of the UPR not only in maintaining endoplasmic reticulum homeostasis but also in influencing various physiological processes in the nervous ***,we provide an overview of recent findings that underscore the UPR’s involvement in preserving the function and viability of neuronal and myelinating cells under physiological conditions,and highlight the critical role of the UPR in brain development,memory storage,retinal cone development,myelination,and maintenance of myelin thickness.

关键词： myelin neuron oligodendrocyte schwann cell unfolded protein response