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钙钛矿LED:半导体界早“瑞士军刀”

科技纵览 2024年第6期 10-11页

作者： Matthew s.smith 不详

PeLED可以用于显示器、指纹识别器、健康传感器和太阳能充电器。现代智能手机的触摸屏之下是一层又一层的玻璃、偏光器、滤色器、电容式触摸传感器等。如今,研究人员开发了一款多功能一体的潜在替代品:感光像素。这些像素的功能远远不... 详细信息

PeLED可以用于显示器、指纹识别器、健康传感器和太阳能充电器。现代智能手机的触摸屏之下是一层又一层的玻璃、偏光器、滤色器、电容式触摸传感器等。如今,研究人员开发了一款多功能一体的潜在替代品:感光像素。这些像素的功能远远不止用于显示屏,它们还可以对放置在上面的物体进行成像、检测指纹,甚至为设备充电。

关键词：瑞士军刀智能手机滤色器指纹识别器触摸屏钙钛矿 LED 显示屏

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***震撼搜索领域

科技纵览 2024年第4期 8-9页

作者： MATTHEW s.smith 不详

ChatGPT在2022年11月30日发布时受到了热烈的称赞,同时也遭到了不少反对.事实很快清晰起来,人们想把那些向人工智能提出过的问题都抛给谷歌,但ChatGPT往往无法回答.

关键词：人工智能 GPT Chat

Harnessing endothelial cells and vascularization strategies for nerve regeneration

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Neural Regeneration Research 2024年第11期19卷 2337-2338页

作者： Papon Muangsanit Poppy smith Virology and Cell Technology Research Team National Center for Genetic Engineering and Biotechnology(BIOTEC)National Science and Technology Development Agency(NSTDA)PathumthaniThailand UCL Centre for Nerve Engineering UCLLondonUK Department of Pharmacology UCL School of PharmacyUCLLondonUK

Peripheral nerves are essential components of the human body’s communication system,transmitting signals between the central nervous system and various body *** resulting from trauma or disease can result in debilitating sensory and motor *** injuries,particularly those resulting in significant gaps in the nerve tissue,pose a formidable challenge for clinicians and *** their limitations,including limited availability and donor site morbidity,nerve autografts remain the clinical gold standard for treating nerve injuries.

关键词： injuries nerves donor

Continental drift, plateau uplift, and the evolutions of monsoon and arid regions in Asia, Africa, and Australia during the Cenozoic

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science China Earth sciences 2019年第7期62卷 1053-1075页

作者： Xiaodong LIU Buwen DONG Zhi-Yong YIN Robin s.smith Qingchun GUO state Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of Sciences CAs Center for Excellence in Tibetan Plateau Earth sciences College of Earth and Planetary sciences University of Chinese Academy of Sciences National Centre for Atmospheric science University of Reading Department of Environmental & Ocean sciences University of San Diego school of Environment and Planning Liaocheng University

Monsoon and arid regions in the Asia-Africa-Australia(A-A-A) realm occupy more than 60% of the total area of these continents. Geological evidence showed that significant changes occurred to the A-A-A environments of the monsoon and arid regions, the land-ocean configuration in the Eastern Hemisphere, and the topography of the Tibetan Plateau(TP) in the Cenozoic. Motivated by this background, numerical experiments for 5 typical geological periods during the Cenozoic were conducted using a coupled ocean-atmosphere general circulation model to systemically explore the formations and evolutionary histories of the Cenozoic A-A-A monsoon and arid regions under the influences of continental drift and plateau uplift. Results of the numerical experiments indicate that the timings and causes of the formations of monsoon and arid regions in the A-A-A realm were very different. The northern and southern African monsoons existed during the mid-Paleocene, while the south Asian monsoon appeared in the Eocene after the Indian subcontinent moved into the tropical Northern Hemisphere. In contrast, the East Asian monsoon and northern Australian monsoon were established much later in the Miocene. The establishment of the tropical monsoons in northern and southern Africa, south Asia, and Australia were determined by both the continental drift and seasonal migration of the Inter-Tropical Convergence Zone(ITCZ), while the position and height of the TP were the key factor for the establishment of the East Asian monsoon. The presence of the subtropical arid regions in northern and southern Africa,Asia, and Australia depended on the positions of the continents and the control of the planetary scale subtropical high pressure zones, while the arid regions in the Arabian Peninsula and West Asia were closely related to the retreat of the Paratethys sea. The formation of the mid-latitude arid region in the Asian interior, on the other hand, was the consequence of the uplift of the *** resul

关键词： Cenozoic Monsoon region Arid region Continental drift Tibetan Plateau uplift Climate simulation

study of the deformed halo nucleus^(31)Ne with Glauber model based on microscopic self-consistent structures

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science China(Physics,Mechanics & Astronomy) 2022年第6期65卷 67-75页

作者： shi-Yi Zhong shi-sheng Zhang Xiang-Xiang sun Michael s.smith school of Physics Beihang UniversityBeijing 100191China school of Nuclear science and Technology University of Chinese Academy of SciencesBeijing 100049China Physics Division Oak Ridge National LaboratoryOak Ridge 378^(31)-6354USA

The exotic deformed nucleus^(31)Ne is studied with an approach that combines self-consistent structure and reaction *** deformed relativistic Hartree-Bogoliubov theory in continuum(DRHBc)is utilized to demonstrate that deformation and pairing correlations give rise to a halo structure with a large-amplitude p-wave configuration in^(31)*** the valence nucleon wave functions and angle-averaged density distributions of ^(30)Ne from this theory are used as input for the Glauber reaction model to study the observables of neutron-rich neon isotopes to search halo *** NL1 effective interaction,our predictions of the reaction cross sections for these exotic neon isotopes on a carbon target can better reproduce the experimental data than those from the relativistic mean field model for a spherical shape with resonances and pairing correlation contributions,and are roughly 3.3%(∼50 mb)larger than those with Gaussian function-fitted densities of the core *** calculated one-neutron removal cross section at 240 MeV/nucleon,and the inclusive longitudinal momentum distribution of the 30Ne residues from the^(31)Ne breakup reaction are largely improved over previous theoretical predictions and agree well with *** reaction evalu-ations indicate a dilute density distribution in coordinate space and are a canonical signature of a halo ***,our predictions with the NL3 and PK1 effective interactions give slightly better descriptions of reaction observables for exotic neon isotopes.

关键词： halo relativistic model Glauber model reaction cross section momentum distribution

Comparisons of oxbow lake fish assemblages in relation to bigheaded carp establishment in the lower White River, Arkansas

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Ecological Processes 2024年第1期13卷 188-205页

作者： Michael A.Eggleton Cody J.salzmann Joseph E.Kaiser shannon C.F.smith Department of Aquaculture and Fisheries University of Arkansas at Pine Bluff Arkansas Game and Fish Commission Virginia Institute of Marine science

Background since the late 1990s, bigheaded carps(largely silver carp [Hypophthalmichthys molitrix] but also bighead carp [H. nobilis]) have established throughout the lower Mississippi River basin. Using previously studied oxbow lakes in the lower White River basin, Arkansas, we compared current(2017, “post-carp” establishment) fish assemblages to historical(2002, “pre-carp” establishment) fish assemblages. Fish assemblages were comprehensively assessed using multiple gears, including boat electrofishing, mini-fyke nets, and experimental small-mesh gill *** T-tests suggested that fish assemblage indices of richness, diversity, evenness, and dominance were often greater(P st-carp period as reflected by boat electrofishing and experimental gill nets. However, all indices were generally similar(P > 0.05) between the pre-carp and post-carp period with fish assemblages depicted using mini-fyke nets. Nonmetric multidimensional scaling analyses indicated that fish assemblages differed structurally between pre-carp and post-carp periods. Assemblage differences were linked to both small and large abundance changes for more than 20 species. Abundances of gizzard shad(Dorosoma cepedianum), emerald shiner(Notropis atherinoides), pugnose minnow(Opsopoeodus emiliae), crappies(Pomoxis spp.), bluegill(Lepomis macrochirus), orangespotted sunfish(L. humilis), and yellow bass(Morone mississippiensis) declined between the pre-carp and postcarp periods. Conversely, abundances of weed shiner(N. texanus), pallid shiner(Hybopsis amnis), longear sunfish(L. megalotis), buffalofishes(Ictiobus spp.), and gars(Lepisosteus spp.) generally increased during the same *** Although not possible to conclude assemblage shifts were entirely related to bigheaded carps due to the absence of an appropriate reference system where carps did not establish, the wide establishment of these carps is one of the most pervasive changes to have occurred in the lower White

关键词： Bigheaded carp silver carp Aquatic nuisance species Fish assemblage Oxbow lake Large river

Helicobacter pylori:High dose amoxicillin does not improve primary or secondary eradication rates in an Irish cohort

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World Journal of Clinical Cases 2024年第16期12卷 2773-2779页

作者： Conor Costigan Aoife M O'sullivan Jim O'Connell shreyashee sengupta Thomas Butler stephen Molloy Fintan John O'Hara Barbara Ryan Niall Breslin sarah O'Donnell Anthony O'Connor sinead smith deirdre McNamara Trinity Academic Gastroenterology Group School of Medicine-Trinity College DublinDublin D2Ireland Department of Gastroenterology Tallaght University HospitalDublin D24 NR0AIreland

BACKGROUND Helicobacter pylori(***)eradication rates have fallen globally,likely in large part due to increasing antibiotic resistance to traditional *** areas of high clarithromycin and metronidazole resistance such as ours,Maastricht VI guidelines suggest high dose amoxicillin dual therapy(HDADT)can be considered,subject to evidence for local *** this study we assess efficacy of HDADT therapy for *** eradication in an Irish *** To assess the efficacy of HDADT therapy for *** eradication in an Irish cohort as both first line,and subsequent therapy for patients diagnosed with *** All patients testing positive for *** in a tertiary centre were treated prospectively with HDADT(amoxicillin 1 g tid and esomeprazole 40 mg bid×14 d)over a period of 8 *** was confirmed with Urea Breath Test at least 4 wk after cessation of therapy.A delta-over-baseline>4%was considered *** demographics and treatment outcomes were recorded,analysed and controlled for basic demographics and prior *** *** One hundred and ninety-eight patients were identified with *** infection,10 patients were excluded due to penicillin allergy and 38 patients refused follow up *** all 139 were included in the analysis,55%(n=76)were female,mean age was 46.6 ***,93(67%)of patients were treatment-naïve and 46(33%)had received at least one previous course of *** groups were statistically ***-reported compliance with HDADT was 97%,mild side-effects occurred in 7%.There were no serious adverse drug *** the eradication rate for our cohort was 56%(78/139).Eradication rates were worse for those with previous treatment[43%(20/46)vs 62%(58/93),P=0.0458,odds ratio=2.15].Age and Gender had no effect on eradication *** Overall eradication rates with HDADT were *** being a simple and possibly better tolerated regime,these results do not

关键词： Helicobacter pylori eradication Helicobacter pylori High dose amoxicillin High dose amoxicillin dual therapy Triple therapy

The impact of the Rural Minimum Living standard Guarantee(Rural Dibao)Program on child nutrition outcomes

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Journal of Integrative Agriculture 2024年第2期23卷 444-456页

作者： Dian Chen Xiangming Fang Yu Chen Xiaodong Zheng Zhuo Chen Rodney B.W.smith Academy of Global Food Economics and Policy China Agricultural UniversityBeijing 100083China school of Public Health Georgia State UniversityAtlanta 30303USA school of Economics Zhejiang Gongshang UniversityHangzhou 310018China College of Public Health University of GeorgiaAthens 30602USA Department of Applied Economics University of MinnesotaSaint Paul 55108USA

The Rural Minimum Living standard Guarantee(Rural Dibao)is an important unconditional cash transfer program to alleviate poverty in rural *** the importance of children’s nutrition in breaking poverty cycles,little is known about the impact of Rural Dibao on child nutrition *** China Family Panel studies(CFPs),this paper examines the effects of Rural Dibao on child nutrition outcomes and investigates potential pathways and heterogeneous *** exploit propensity score matching and difference-in-differences techniques to evaluate the effects of the Rural Dibao program on child nutrition *** results suggest that Rural Dibao significantly impacts the nutrition outcomes of children up to 15 years of ***,our results suggest that Rural Dibao improves child height-to-age z-scores by 1.05 standard deviations and lowers the probability of stunting by 11.9 percentage *** analyses suggest that increased protein intake is the main pathway through which Rural Dibao participation contributes to better nutrition *** also find that the effect of the program is more pronounced among girls,children who are non-left-behind or live with highly educated mothers,and those from low-income families and poor *** findings suggest that Rural Dibao participation helps improve child nutrition outcomes through improving diet quality.

关键词： Rural Minimum Living standard Guarantee nutrition height-to-age z-scores stunting rural China

Recent advances using cyclopropanols and cyclobutanols in ring-openingasymmetric synthesis

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Green synthesis and Catalysis 2022年第3期3卷 219-226页

作者： Hong Yan Gregory s.smith Fen-Er Chen Institute of Pharmaceutical science and Technology College of ChemistryFuzhou UniversityFuzhou 350108China Engineering Center of Catalysis and synthesis for Chiral Molecules Department of ChemistryFudan UniversityShanghai 200433China shanghai Engineering Research Center of Industrial Asymmetric Catalysis of Chiral Drugs Fudan UniversityShanghai 200433China Department of Chemistry University of Cape TownRondeboschCape Town 7700South Africa

Due to high ring strain energies,cyclopropanols and cyclobutanols have a strong tendency of breaking theendocyclic C–C bonds to participate in versatile organic *** an inherent three-dimensionalstructure,cyclopropanols and cyclobutanols have the advantage of synthesizing linear or cyclic molecules withstereogenic centers via ring-opening asymmetric *** are three strategies for the ring-opening ofcyclopropanols and cyclobutanols usually involved in asymmetric synthesis:1)β-carbon elimination of metalalkoxide;2)radical ring-opening;3)ring-opening via semipinacol *** present review has high-lighted the progress developed in the last five years.

关键词： Cyclopropanol Cyclobutanol Ring-opening C–C bond cleavage Asymmetric synthesis