检索结果-南通市图书馆

Perceived Social Support and Symptoms of Depression and Anxiety among Chinese Adolescents:A Moderated Chain Mediation Model

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Mental Health Promotion 2025年第1期27卷 29-40页

作者： Le-Qing Jin Chen-Wei Pan Chun-Hua Zhao Dan-Lin Li Yi-Bo Wu Tian-Yang Zhang School of Public Health Suzhou Medical CollegeSoochow UniversitySuzhou215123China Department of General Medicine and Big Data center The Affiliated Suzhou Hospital of Nanjing Medical UniversitySuzhou215008China School of Public Health Peking UniversityBeijing100191China graduate School of interdisciplinary Science and Engineering in Health Systems Okayama UniversityOkayama700-8530Japan

Background:Although previous studies indicate that perceived social support might be associated with adolescent psychological problems,the specific mechanism has not been thoroughly *** on theoretical and empirical research on problematic Internet use(PIU)and sleep quality,this study explored whether they play a mediating role between perceived social support and symptoms of depression and anxiety among ***,we investigated whether these relationships varied by place of ***:A sample of 2115 Chinese adolescents was included,and analyzed data related to perceived social support,PIU,sleep quality,symptoms of depression and anxiety,and sociodemographic *** analysis,mediation,and moderation analysis were mainly ***:Perceived social support was negatively correlated with depressive symptoms(r=−0.22,p<0.001)and anxiety symptoms(r=−0.20,p<0.001)among *** and sleep quality played a chain mediating role in the relationship between perceived social support and symptoms of depression and anxiety in ***,the place of residence moderated the relationships between perceived social support and PIU and symptoms of depression and *** social support was a significant negative predictor of PIU and symptoms of depression and anxiety among adolescents in urban areas but not in rural ***:The findings suggest that low levels of perceived social support may lead to more PIU and poorer sleep quality,which may further increase the risk of symptoms of depression and anxiety in adolescents,especially in urban areas.

关键词： Perceived social support psychological problems problematic internet use sleep quality urban-rural difference

Electricity consumption patterns within cities:application of a data-driven settlement characterization method

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Digital Earth 2020年第1期13卷 119-135页

作者： Pranab K.Roy Chowdhury Jeanette E.Weaver Eric M.Weber Dalton Lunga St.Thomas M.LeDoux Amy N.Rose Budhendra L.Bhaduri Urban Dynamics Institute&Geographic Information Science and Technology Group Oak Ridge National LaboratoryOak RidgeTNUSA bredesen center For interdisciplinary research and graduate education University of TennesseeKnoxvilleTNUSA

Urban areas presently consume around 75%of global primary energy supply,which is expected to significantly increase in the future due to urban *** sustainable,universal energy access is a pressing challenge for most parts of the *** urban energy consumption patterns may help to address the challenges to urban sustainability and energy ***,urban energy analyses are severely limited by the lack of urban energy *** datasets are virtually non-existent for the developing *** per current projections,most of the new urban growth is bound to occur in these data-starved ***,there is an urgent need of research methods for monitoring and quantifying urban energy utilization ***,we apply a data-driven approach to characterize urban settlements based on their formality,which is then used to assess intraurban urban energy consumption in Johannesburg,South Africa;Sana’a,Yemen;and Ndola,*** is the fastest growing energy *** analyzing the relationship between the settlement types and the corresponding nighttime light emission,a proxy of electricity consumption,we assess the differential electricity consumption *** study presents a simple and scalable solution to fill the present data void to understand intra-city electricity consumption patterns.

关键词： Settlement characterization cities urban electricity consumption VIIRS nighttime lights developing countries

High-performance multilayer WSe2 field-effect transistors with carrier type control

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano research 2018年第2期11卷 722-730页

作者： Pushpa Raj Pudasaini Akinola Oyedele Cheng Zhang Michael G. Stanford Nicholas Cross Anthony T. Wong Anna N. Hoffman Kai Xiao Gerd Duscher David G. Mandrus Thomas Z. Ward Philip D. Rack Department of Materials Science and Engineering University of Tennessee Knoxville USA center for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge USA bredesen center for interdisciplinary research and graduate education University of Tennessee Knoxville USA Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge USA

In this stud high-performance multilayer WSe2 field-effect transistor （FET） devices with carrier type control are demonstrated via thickness modulation and a remote oxygen plasma surface treatment. Carrier type control in multilayer WSe2 FET devices with Cr/Au contacts is initially demonstrated by modulating the WSe2 thickness. The carrier type evolves with increasing WSe2 channel thickness, being p-type, ambipolar, and n-type at thicknesses 〈 3, - 4, and 〉 5 nm, respectively. The thickness-dependent carrier type is attributed to changes in the bandgap of WSe2 as a function of the thickness and the carrier band offsets relative to the metal contacts. Furthermore, we present a strong hole carrier doping effect via remote oxygen plasma treatment. It non-degenerately converts n-type characteristics into p-type and enhances field-effect hole mobility by three orders of magnitude. This work demonstrates progress towards the realization of high-performance multilayer WSe2 FETs with carrier type control, potentially extendable to other transition metal dichalcogenides, for future electronic and oDtoelectronic alpplications.

关键词： transition metaldichalcogenide field-effect transistors carrier control plasma treatment carrier mobility

Size tuning and oxygen plasma induced pore formation on silica nanoparticles

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2012年第3期22卷 193-200页

作者： Remya Nair Y. Yoshida T. Maekawa D. Sakthi Kumarn BioNano Electronics research center Graduate School of Interdisciplinary New Science Toyo University

Silica nanoparticles have been prepared from tetraethylorthosilicate dissolved in ethanol followed by base-catalyzed condensation. Earlier works reported that at least four parameters, namely concentration of tetraethylorthosilicate, ethanol, water and ammonia solution are needed to be optimized for the size tuning of silica nanoparticles. In this work size tuning of 5 nm-250 nm has been achieved by varying a single synthesis parameter i.e., the concentration of ammonia solution. Oxygen plasma was found to be successful for generating pores on silica nanoparticles without using any structure directing agents. The properties and morphology of nanoparticles were investigated by transmission electron microscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy and Fourier transformed infrared spectroscopy.

关键词： Silica nanoparticles Size tuning Plasma treatment Pore induction

Explainable artificial intelligence in breast cancer detection and risk prediction:A systematic scoping review

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Cancer Innovation 2024年第5期3卷 1-22页

作者： Amirehsan Ghasemi Soheil Hashtarkhani David L.Schwartz Arash Shaban‐Nejad Department of Pediatrics Center for Biomedical InformaticsCollege of MedicineUniversity of Tennessee Health Science CenterMemphisTennesseeUSA the bredesen center for interdisciplinary research and graduate education University of TennesseeKnoxvilleTennesseeUSA Department of Radiation Oncology College of MedicineUniversity of Tennessee Health Science CenterMemphisTennesseeUSA

With the advances in artificial intelligence(AI),data‐driven algorithms are becoming increasingly popular in the medical ***,due to the nonlinear and complex behavior of many of these algorithms,decision‐making by such algorithms is not trustworthy for clinicians and is considered a blackbox ***,the scientific community has introduced explainable artificial intelligence(XAI)to remedy the *** systematic scoping review investigates the application of XAI in breast cancer detection and risk *** conducted a comprehensive search on Scopus,IEEE Explore,PubMed,and Google Scholar(first 50 citations)using a systematic search *** search spanned from January 2017 to July 2023,focusing on peer‐reviewed studies implementing XAI methods in breast cancer *** studies met our inclusion criteria and were included in the *** results revealed that SHapley Additive exPlanations(SHAP)is the top model‐agnostic XAI technique in breast cancer research in terms of usage,explaining the model prediction results,diagnosis and classification of biomarkers,and prognosis and survival ***,the SHAP model primarily explained tree‐based ensemble machine learning *** most common reason is that SHAP is model agnostic,which makes it both popular and useful for explaining any model ***,it is relatively easy to implement effectively and completely suits performant models,such as tree‐based *** AI improves the transparency,interpretability,fairness,and trustworthiness of AI‐enabled health systems and medical devices and,ultimately,the quality of care and outcomes.

关键词： breast cancer deep learning explainable artificial intelligence interpretable AI machine learning XAI

A visual analytics system to support the formation of a hypothesis from calcium wave data

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Visual Informatics 2018年第1期2卷 2-13页

作者： Kozen Umezawa Hiroaki Natsukawa Yosuke Onoue Koji Koyamadab Department of Electrical Engineering Graduate School of EngineeringKyoto UniversityKyotoJapan Academic center for Computing and Media Studies Kyoto UniversityKyotoJapan Advanced research center for the Promotion of interdisciplinary education and research Kyoto UniversityKyotoJapan

In most species,calcium waves in the oocyte are considered common phenomena in the activation of ***,the mechanism of calcium waves has not yet been *** collaborating with biologists studying Caenorhabditis elegans(***),which is widely used as a model organism,we observed that the following requirements must be satisfied to form a useful hypothesis based on calcium waves captured using high-speed in vivo imaging:(1)the ability to obtain an overview of how the calcium waves are propagated and(2)the ability to understand the propagation of waves in a narrow ***,conventional visualization methods cannot satisfy these requirements ***,we propose a visual analytics system that allows users to understand and explore calcium wave images using cross-correlation analysis of the time-series data of the Ca^(2+)fluorescence intensity at each *** interface of this system comprises an overview visualization,a detail visualization,and user interactions to satisfy these requirements and realize exploratory *** views present an overview visualization that displays the clustering results of a directed graph calculated using cross-correlation *** views enable the users to understand the overview of wave propagation,thereby helping users find a region of *** detail visualization shows the relationship between the region of interest and other ***,users can use the proposed system with overview-detail and brush-link exploration to assign meaning to the region of interest and construct a hypothesis for its *** this paper,we demonstrate how the proposed visual analytics approach works and how new hypotheses can be formed using the analysis of *** calcium waves.

关键词： Visual Knowledge Discovery Time Series Data Bioinfonnatics Visualization

Learning surface molecular structures via machine vision

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

npj Computational Materials 2017年第1期3卷 194-202页

作者： Maxim Ziatdinov Artem Maksov Sergei V.Kalinin Institute for Functional Imaging of Materials Oak Ridge National LaboratoryOak RidgeTN 37831USA center for Nanophase Materials Sciences Oak Ridge National LaboratoryOak RidgeTN 37831USA bredesen center for interdisciplinary research University of TennesseeKnoxvilleTN 37996USA

Recent advances in high resolution scanning transmission electron and scanning probe microscopies have allowed researchers to perform measurements of materials structural parameters and functional properties in real space with a picometre *** many technologically relevant atomic and/or molecular systems,however,the information of interest is distributed spatially in a non-uniform manner and may have a complex multi-dimensional *** of the critical issues,therefore,lies in being able to accurately identify(‘read out’)all the individual building blocks in different atomic/molecular architectures,as well as more complex patterns that these blocks may form,on a scale of hundreds and thousands of individual atomic/molecular *** we employ machine vision to read and recognize complex molecular assemblies on ***,we combine Markov random field model and convolutional neural networks to classify structural and rotational states of all individual building blocks in molecular assembly on the metallic surface visualized in high-resolution scanning tunneling microscopy *** show how the obtained full decoding of the system allows us to directly construct a pair density function—a centerpiece in analysis of disorderproperty relationship paradigm—as well as to analyze spatial correlations between multiple order parameters at the nanoscale,and elucidate reaction pathway involving molecular conformation *** method represents a significant shift in our way of analyzing atomic and/or molecular resolved microscopic images and can be applied to variety of other microscopic measurements of structural,electronic,and magnetic orders in different condensed matter systems.

关键词： allowed classify spatially

Fundamental electronic structure and multiatomic bonding in 13 biocompatible high-entropy alloys

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

npj Computational Materials 2020年第1期6卷 1296-1305页

作者： Wai-Yim Ching Saro San Jamieson Brechtl Ridwan Sakidja Miqin Zhang Peter K.Liaw Department of Physics and Astronomy University of Missouri Kansas CityKansas CityMO 64110USA the bredesen center for interdisciplinary research and graduate education The University of TennesseeKnoxvilleTN 37996-3394USA Department of Physics Astronomy and Materials ScienceMissouri State UniversitySpringfieldMO 65897USA Department of Materials Science and Engineering The University of WashingtonSeattleWA 98195USA Department of Materials Science and Engineering The University of TennesseeKnoxvilleTN 37996-2100USA

High-entropy alloys(HEAs)have attracted great attention due to their many unique properties and potential *** nature of interatomic interactions in this unique class of complex multicomponent alloys is not fully developed or *** report a theoretical modeling technique to enable in-depth analysis of their electronic structures and interatomic bonding,and predict HEA properties based on the use of the quantum mechanical metrics,the total bond order density(TBOD)and the partial bond order density(PBOD).Application to 13 biocompatible multicomponent HEAs yields many new and insightful results,including the inadequacy of using the valence electron count,quantification of large lattice distortion,validation of mechanical properties with experiment data,modeling porosity to reduce Young’s *** work outlines a road map for the rational design of HEAs for biomedical applications.

关键词： alloys bonding entropy

Isobaric Tags for Relative and Absolute Quantificationbased Comparative Proteomics Reveals the Features of Plasma Membrane-Associated Proteomes of Pollen Grains and Pollen Tubes from Lilium davidii

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 Integrative Plant Biology 2010年第12期52卷 1043-1058页

作者： Bing Han Sixue Chen Shaojun Dai Ning Yang Tai Wang research center for Molecular & Developmental Biology Key Laboratory of Photosynthesis & Environmental Molecular Physiology Institute of Botany Chinese Academy of Sciences and National Center for Plant Gene Research Beijing 100093 China Department of Biology Genetics Institute and Interdisciplinary Center for Biotechnology Research University of Florida GaJnesville Florida 32610 USA Key Laboratory of Saline-alkali Vegetation Ecology Restoration in Oil Field Ministry of Education Northeast Forestry University Harbin 150040 China graduate University of the Chinese Academy of Sciences Beijing 10049 China

Mature pollen grains （PGs） from most plant species are metabolically quiescent. However, once pollinated onto stigma, they quickly hydrate and germinate. A PG can give rise to a vegetative cell-derived polarized pollen tube （PT）, which represents a specialized polar cell. The polarized PT grows by the tip and requires interaction of different signaling molecules localized in the apical plasma membrane and active membrane trafficking. The mechanisms underlying the interaction and membrane trafficking are not well understood. In this work, we purified PG and PT plasma-membrane vesicles from Lilium davidii Duch. using the aqueous two-phase partition technique, then enriched plasma membrane proteins by using Brij58 and KCl to remove loosely bound contaminants. We identified 223 integral and membrane-associated proteins in the plasma membrane of PGs and PTs by using isobaric tags for relative and absolute quantification （iTRAQ） and 2-D high-performance liquid chromatography-tandem mass spectrometry. More than 68% of the proteins have putative transmembrane domains and/or lipid-modified motifs. Proteins involved in signal transduction, membrane trafficking and transport are predominant in the plasma-membrane proteome. We revealed most components of the clathrin-dependent endocytosis pathway. Statistical analysis revealed 14 proteins differentially expressed in the two development stages： in PTs, six upregulated and eight downregulated are mainly involved in signaling, transport and membrane trafficking. These results provide novel insights into polarized PT growth.

关键词： LILIES PROTEOMICS COMPARATIVE studies PLANT cell membranes PLANT physiology POLLEN tube PLANT species PLANT metabolism