检索结果-内蒙古大学图书馆

Scientists Against War: A Plea to World Leaders for Better Governance

Sleep and vigilance 2022年第1期6卷 1-6页

作者： Seithikurippu R Pandi-Perumal Velayudhan Mohan Kumar Namasivayam Ganesh Pandian Joop T de Jong Sudalaikannu Andiappan Alexandru Corlateanu Arehally Marappa Mahalaksmi Saravana Babu Chidambaram Ramasamy Rajesh Kumar Chellamuthu Ramasubramanian Sudhakar Sivasubramaniam Alvhild Alette Bjørkum JosAnn Cutajar Michael Berk Ilya Trakht Anton Vrdoljak Miguel Meira E Cruz Harris A Eyre Janne Grønli Dainiel P Cardinali Andreas Maercker Willem A C M van de Put Jaswant Guzder Bjørn Bjorvatn Wietse A Tol Darío Acuña-Castroviejo Marie Meudec Charles M Morin Markku Partinen Corrado Barbui Mark J D Jordans Mario H Braakman Christine Knaevelsrud Ståle Pallesen Marit Sijbrandij Diego Andrés Golombek Colin A Espie Pim Cuijpers Hernán Andrés Marín Agudelo Koos van der Velden Bessel A van der Kolk Stevan E Hobfoll Walter L J M Devillé Michael Gradisar Dieter Riemann John Axelsson Gloria Benítez-King Robert D Macy Vitalii Poberezhets Samuel Ratnajeevan Herbert Hoole Rangaswamy Srinivasa Murthy Thomas Hegemann Andreas Heinz Jane Salvage Alexander C McFarlane Rob Keukens Harendra de Silva Cornelia Oestereich Jochen Wilhelm Michael von Cranach Klaus Hoffmann Matthias Klosinski Dinesh Bhugra Mary V Seeman Somnogen Canada Inc. College Street Toronto Canada. Saveetha Medical College and Hospitals Saveetha Institute of Medical and Technical Sciences Saveetha University Chennai India. Kerala Chapter National Academy of Medical Sciences (India) New Delhi India. Institute for Integrated Cell-Material Sciences (WPI-iCeMS) A210 Kyoto University Institute for Advanced Study Yoshida Ushinomiya-cho Sakyo-ku Kyoto 606-8501 Japan. Department of Cultural Psychiatry and Global Mental Health Amsterdam UMC Amsterdam The Netherlands. Boston University School of Medicine Boston USA. Department of Gandhian Studies and Ramalingar Philosophy School of Religions Philosophy and Humanist Thought Madurai Kamaraj University Madurai Tamil Nadu India. Department of Respiratory Medicine Nicolae Testemitanu State University of Medicine and Pharmacy Chisinau Moldova. Department of Pharmacology JSS College of Pharmacy JSS Academy of Higher Education and Research Mysuru 570015 India. Global Community Educational Foundation (NGCEF) 7 Peterlee Pl Hebersham NSW 2770 Australia. Division of Community Psychiatry M. S. Chellamuthu Trust and Research Foundation Madurai India. Department of Biotechnology Manonmaniam Sundaranar University Tirunelveli Tamil Nadu 627012 India. Department of Safety Chemistry and Biomedical Laboratory Sciences Faculty of Engineering and Science Western Norway University of Applied Sciences Kronstad Bergen Norway. Department of Gender and Sexualities Faculty for Social Wellbeing University of Malta Room # 114 Guze Cassar Pullicino Building Msida 2080 MSD Malta. Deakin University The Institute for Mental and Physical Health and Clinical Translation (IMPACT) School of Medicine Barwon Health Geelong Australia. Department of Medicine Columbia University New York NY USA. Faculty of Civil Engineering Architecture and Geodesy University of Mostar Kampus Sveučilišta Maticehrvatskeb. b 88000 Mostar Bosnia and Herzegovina. Centro Cardiovascular da Universidade de Lisboa

来源：评论

学校读者我要写书评

暂无评论

Elucidating the atomistic mechanisms underpinning plasticity in Li-Si nanostructures

引用

Physical Review materials 2017年第5期1卷 055401-055401页

作者： Xin Yan Afif Gouissem Pradeep R. Guduru Pradeep Sharma Department of Mechanical Engineering University of Houston Texas 77004 USA School of Engineering Brown University Providence Rhode Island 02912 USA Department of Physics University of Houston Texas 77004 USA Material Science and Engineering Program University of Houston Texas 77004 USA

Amorphous lithium-silicon (a-Li-Si), especially in nanostructure form, is an attractive high-capacity anode material for next-generation Li-ion batteries. During cycles of charging and discharging, a-Li-Si undergoes substantive inelastic deformation and exhibits microcracking. The mechanical response to repeated lithiation-delithiation eventually results in the loss of electrical contact and consequent decrease of capacity, thus underscoring the importance of studying the plasticity of a-Li-Si nanostructures. In recent years, a variety of phenomenological continuum theories have been introduced that purport to model plasticity and the electro-chemo-mechanical behavior of a-Li-Si. Unfortunately, the micromechanisms and atomistic considerations underlying plasticity in Li-Si material are not yet fully understood and this impedes the development of physics-based constitutive models. Conventional molecular dynamics, although extensively used to study this material, is grossly inadequate to resolve this matter. As is well known, conventional molecular dynamics simulations can only address phenomena with characteristic time scales of (at most) a microsecond. Accordingly, in such simulations, the mechanical behavior is deduced under conditions of very high strain rates (usually, 108s−1 or even higher). This limitation severely impacts a realistic assessment of rate-dependent effects. In this work, we attempt to circumvent the time-scale bottleneck of conventional molecular dynamics and provide novel insights into the mechanisms underpinning plastic deformation of Li-Si nanostructures. We utilize an approach that allows imposition of slow strain rates and involves the employment of a new and recently developed potential energy surface sampling method—the so-called autonomous basin climbing—to identify the local minima in the potential energy surface. Combined with other techniques, such as nudged elastic band, kinetic Monte Carlo and transition state theory, we assess the b

关键词： Mechanical deformation Plasticity Energy materials Nanostructures Multiscale modeling

来源：评论

学校读者我要写书评

暂无评论

Spin mediated enhanced negative magnetoresistance in Ni80Fe20 and p-silicon bilayer

arXiv

引用

arXiv 2017年

作者： Lou, Paul C. Kumar, Sandeep Department of Mechanical Engineering University of California RiversideCA United States Material Science and Engineering Program University of California RiversideCA United States

In this work, we present an experimental study of spin mediated enhanced negative magnetoresistance in Ni80Fe20 (50 nm)/p-Si (350 nm) bilayer. The resistance measurement shows a reduction of ~2.5% for the bilayer specimen as compared to 1.3% for Ni80Fe20 (50 nm) on oxide specimen for an out-of-plane applied magnetic field of 3T. In the Ni80Fe20-only film, the negative magnetoresistance behavior is attributed to anisotropic magnetoresistance. We propose that spin polarization due to spin-Hall effect is the underlying cause of the enhanced negative magnetoresistance observed in the bilayer. Silicon has weak spin orbit coupling so spin Hall magnetoresistance measurement is not feasible. We use V2ω and V3ω measurement as a function of magnetic field and angular rotation of magnetic field in direction normal to electric current to elucidate the spin-Hall effect. The angular rotation of magnetic field shows a sinusoidal behavior for both V2ω and V3ω, which is attributed to the spin phonon interactions resulting from the spin-Hall effect mediated spin polarization. We propose that the spin polarization leads to a decrease in hole-phonon scattering resulting in enhanced negative magnetoresistance. Copyright © 2017, The Authors. All rights reserved.

关键词： Spin Hall effect

来源：评论

学校读者我要写书评

暂无评论

In-situ deposition of hematite (α-Fe2O3) microcubes on cotton cellulose via hydrothermal method

引用

Journal of Physics: Conference Series 2018年第1期985卷

作者： M Gili G Latag M Balela Material Science and Engineering Program College of Science University of the Philippines Diliman Quezon City 1101 Philippines Department of Mining Metallurgical and Materials Engineering College of Engineering University of the Philippines Diliman Quezon City 1101 Philippines

Hematite microcubes with truncated edges have been successfully deposited on cotton cellulose via one-step hydrothermal process using anhydrous FeCl3 and glycine as Fe(III) precursor and chelating agent, respectively. The amount of glycine significantly affects the morphology and yield of hematite. The addition of 0.495 g of glycine to 50 ml of 0.1 M FeCl3 solution with 0.400 g of cotton resulted to hematite-deposited cellulose having ~15% hematite content. The reduction of glycine to 0.247 g increased the amount of hematite on the surface of the cotton cellulose to ~20% by weight. However, the hematite microcubes have a wide size distribution, with particle size in the range of 0.684 μm to 1.520 μm. Without glycine, hematite cannot be formed in the solution.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Room‐Temperature Ferroelectricity in an Organic Cocrystal

引用

Angewandte Chemie 2018年第29期130卷

作者： Ren A. Wiscons N. Rajesh Goud Joshua T. Damron Adam J. Matzger Department of Chemistry and the Macromolecular Science and Engineering Program University of Michigan 930 North University Avenue Ann Arbor MI 48109-1055 USA

Ferroelectric materials exhibit switchable remanent polarization due to reversible symmetry breaking under an applied electric field. Previous research has leveraged temperature‐induced neutral‐ionic transitions in charge‐transfer (CT) cocrystals to access ferroelectrics that operate through displacement of molecules under an applied field. However, displacive ferroelectric behavior is rare in organic CT cocrystals and achieving a Curie temperature ( T C ) above ambient has been elusive. Here a cocrystal between acenaphthene and 2,3,5,6‐tetrafluoro‐7,7,8,8‐tetracyanoquinodimethane is presented that shows switchable remanent polarization at room temperature ( T C =68 °C). Raman spectroscopy, X‐ray diffraction, and solid‐state NMR spectroscopy indicate the ferroelectric behavior is facilitated by acenaphthene (AN) rotation, deviating from conventional design strategies for CT ferroelectrics. These findings highlight the relevance of non‐CT interactions in the design of displacive ferroelectric cocrystals.

关键词： Ferroelektrika Kristall-engineering Ladungstransfer Organische Elektronik Polarisierung

来源：评论

学校读者我要写书评

暂无评论

Author Correction: Enhancing untargeted metabolomics using metadata-based source annotation

引用

Nature biotechnology 2023年第11期41卷 1656页

作者： Julia M Gauglitz Kiana A West Wout Bittremieux Candace L Williams Kelly C Weldon Morgan Panitchpakdi Francesca Di Ottavio Christine M Aceves Elizabeth Brown Nicole C Sikora Alan K Jarmusch Cameron Martino Anupriya Tripathi Michael J Meehan Kathleen Dorrestein Justin P Shaffer Roxana Coras Fernando Vargas Lindsay DeRight Goldasich Tara Schwartz MacKenzie Bryant Gregory Humphrey Abigail J Johnson Katharina Spengler Pedro Belda-Ferre Edgar Diaz Daniel McDonald Qiyun Zhu Emmanuel O Elijah Mingxun Wang Clarisse Marotz Kate E Sprecher Daniela Vargas-Robles Dana Withrow Gail Ackermann Lourdes Herrera Barry J Bradford Lucas Maciel Mauriz Marques Juliano Geraldo Amaral Rodrigo Moreira Silva Flavio Protasio Veras Thiago Mattar Cunha Rene Donizeti Ribeiro Oliveira Paulo Louzada-Junior Robert H Mills Paulina K Piotrowski Stephanie L Servetas Sandra M Da Silva Christina M Jones Nancy J Lin Katrice A Lippa Scott A Jackson Rima Kaddurah Daouk Douglas Galasko Parambir S Dulai Tatyana I Kalashnikova Curt Wittenberg Robert Terkeltaub Megan M Doty Jae H Kim Kyung E Rhee Julia Beauchamp-Walters Kenneth P Wright Maria Gloria Dominguez-Bello Mark Manary Michelli F Oliveira Brigid S Boland Norberto Peporine Lopes Monica Guma Austin D Swafford Rachel J Dutton Rob Knight Pieter C Dorrestein Collaborative Mass Spectrometry Innovation Center University of California San Diego La Jolla CA USA. Skaggs School of Pharmacy and Pharmaceutical Sciences University of California San Diego La Jolla CA USA. Beckman Center for Conservation Research San Diego Zoo Wildlife Alliance Escondido CA USA. Center for Microbiome Innovation Joan and Irwin Jacobs School of Engineering University of California San Diego La Jolla CA USA. Division of Biological Sciences University of California San Diego La Jolla CA USA. Department of Pediatrics School of Medicine University of California San Diego La Jolla CA USA. Bioinformatics and Systems Biology Program University of California San Diego La Jolla CA USA. Division of Rheumatology Allergy & Immunology Department of Medicine University of California San Diego La Jolla CA USA. Division of Epidemiology and Community Health School of Public Health University of Minnesota Minneapolis MN USA. Department of Integrative Physiology University of Colorado Boulder Boulder CO USA. Department of Population Health Sciences University of Wisconsin-Madison Madison WI USA. Servicio Autónomo Centro Amazónico de Investigación y Control de Enfermedades Tropicales Simón Bolívar Puerto Ayacucho Amazonas Venezuela. Department of Pediatrics Billings Clinic Billings MT USA. Department of Animal Science Michigan State University East Lansing MI USA. Department of Pharmacology Ribeirão Preto Medicinal School Center of Research in Inflammatory Diseases University of São Paulo Ribeirão Preto Sao Paolo Brazil. Multidisciplinary Health Institute Federal University of Bahia Vitória da Conquista Bahia Brazil. NPPNS Department of Biomolecular Sciences School of Pharmaceutical Sciences of Ribeirão Preto University of São Paulo Ribeirão Preto Sao Paolo Brazil. Department of Internal Medicine Ribeirão Preto Medical School Center of Research in Inflammatory Diseases University of São Paulo Ribeirão Preto Sao Paolo Brazil. Department

来源：评论

学校读者我要写书评

暂无评论

The role of molecular properties on the dimerization of aromatic compounds

arXiv

引用

arXiv 2017年

作者： Elvati, Paolo Turrentine, Kirk Violi, Angela Department of Mechanical Engineering University of Michigan Ann ArborMI48109-2125 United States Departments of Chemical Engineering Biomedical Engineering Macromolecular Science and Engineering Biophysics Program University of Michigan Ann ArborMI United States

Recent results have shown the presence and importance of oxygen chemistry during the growth of aromatic compounds, leading to the formation of oxygenated structures that have been identified in various environments. Since the formation of polycyclic aromatic compounds (PAC) bridge the formation of gas-phase species with particle inception, in this work we report a detailed analysis of the effects of molecular characteristics on physical growth of PAC via dimerization. We have included oxygen content, mass, type of bonds (rigid versus rotatable), and shape as main properties of the molecules and studied their effect on the propensity of these structures to form homo-molecular and hetero-molecular dimers. Using enhanced sampling molecular dynamics techniques, we have computed the free energy of dimerization in the temperature range 500-1680 K. Initial structures used in this study were obtained from experimental data. The results show that although the effects of shape, presence of oxygen, mass, and internal bonds are tightly intertwined, and their relative importance changes with temperature. In general, mass and the presence of rotatable bonds are the best indicators. The results provide knowledge on the inception step and the role that particle characteristics play during inception. In addition, our study highlights the fact that current models that use stabilomers as monomers for physical aggregation are overestimating the importance of this process during particle nucleation. Copyright © 2017, The Authors. All rights reserved.

关键词： Molecular dynamics

来源：评论

学校读者我要写书评

暂无评论

LED Lights with Hidden Intensity-Modulated Blue Channels Aiming for Enhanced Subconscious Visual Responses

IEEE Photonics Journal

引用

IEEE Photonics Journal 2017年第3期9卷 8201009页

作者： Vartanian, Garen Wong, Kwoon Y. Ku, Pei-Cheng Macromolecular Science and Engineering Graduate Program University of Michigan Ann ArborMI48109 United States Department of Ophthalmology and Visual Sciences University of Michigan Ann ArborMI48109 United States Department of Electrical Engineering and Computer Science University of Michigan Ann ArborMI48109 United States

A new form of light-emitting diode (LED) light suitable for general illumination is proposed to enhance subconscious, nonimage-forming visual responses, which are essential to our well-being. Pulsing light has been shown to reduce photoreceptor adaptation and elicit stronger subconscious visual responses at an indoor illumination level. Using the silent substitution technique, a melanopsin-selective flicker can be added into white light. A linear optimization algorithm was developed to suppress any perceivable fluctuation of light intensity and colors of illuminated objects. Two examples of lights are given to illustrate the potential applications of the proposed multi-LED light for general illumination and therapeutic purposes. © 2009-2012 IEEE.

关键词： Light emitting diodes

来源：评论

学校读者我要写书评

暂无评论

Relevance of packing to colloidal self-assembly

arXiv

引用

arXiv 2017年

作者： Cersonsky, Rose van Anders, Greg Dodd, Paul M. Glotzer, Sharon C. Macromolecular Science and Engineering Program University of Michigan Ann ArborMI48109 United States Department of Chemical Engineering University of Michigan Ann ArborMI48109 United States Department of Macromolecular Science and Engineering University of Michigan Ann ArborMI48109 United States Department of Materials Science and Engineering University of Michigan Ann ArborMI48109 United States Biointerfaces Institute University of Michigan Ann ArborMI48109 United States

Since the 1920s, packing arguments have been used to rationalize crystal structures in systems ranging from atomic mixtures to colloidal crystals. Packing arguments have recently been applied to complex nanoparticle structures, where they often, but not always, work. We examine when, if ever, packing is a causal mechanism in hard particle approximations of colloidal crystals. We investigate three crystal structures comprised of their ideal packing shapes. We show that, contrary to expectations, the ordering mechanism cannot be packing, even when the thermodynamically self-assembled structure is the same as that of the densest packing. We also show that the best particle shapes for hard particle colloidal crystals in the infinite pressure limit are imperfect versions of the ideal packing shape. Copyright © 2017, The Authors. All rights reserved.

关键词： Crystal atomic structure

来源：评论

学校读者我要写书评

暂无评论

Comparative photocatalytic performances towards acid yellow 17 (AY17) and direct blue 71 (DB71) degradation using Sn3O4 flower-like structure

引用

Journal of Physics: Conference Series 2019年第1期1282卷

作者： A Huda R Ichwani C T Handoko M D Bustan B Yudono F Gulo Program Studi Ilmu Lingkungan Program Pascasarjana Universitas Sriwijaya Jalan Padang Selasa No. 524 Palembang 30121 Sumatera Selatan Indonesia Department of Material Science and Engineering Worcester Polytechnic Institute Worcester-MA 01609 United State of America Program Studi Teknik Kimia Fakultas Teknik Universitas Sriwijaya Jalan Palembang Prabumulih Km. 32 Indralaya Ogan Ilir 30862 Sumatera Selatan Indonesia

Microsphere Sn3O4 flower-like structure has been successfully synthesized using a novel microwave-assisted hydrothermal method and comprehensively characterized by X-ray diffraction (XRD), field emission gun scanning electron microscope (FEG-SEM) and UV Vis spectrophotometer equipped with diffuse reflectance spectroscopy (UV-Vis DRS). In order to examine its photocatalytic performance, two synthetic azo-based dyes, acid yellow 17 (AY17) and direct blue 71 (DB71), have been used as organic pollutant models degraded under visible-light illumination. The results show that the negative charges of Sn3O4 produce higher efficiency photocatalytic activity on DB71 degradation compared to that on AY17 degradation. Further investigation has confirmed that the adsorption capacities played the main role in determining photocatalytic performance and differentiated the quantum yield of dye degradation. Moreover, the different adsorption capacities are generated by the formation of electrostatic interaction and repulsion between surface charge of Sn3O4 and dyes functional groups.

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：