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10th European Congress and Exposition on Noise Control engineering, Euronoise 2015

作者： Erdil, Meltem Tavukçuoğlu, Ayşe Çalışkan, Mehmet Department of Architecture Graduate Program in Building Science Middle East Technical University Ankara Turkey Department of Architecture Materials Conservation Laboratory Middle East Technical University Ankara Turkey Department of Mechanical Engineering Middle East Technical University Ankara Turkey

The impact and airborne sound transmission characteristics of interior wall and floor components in traditional timber-framed dwellings (Ankara, Turkey) were examined by in-situ acoustical measurements and simulation analyses. Presence of voids for the running of pipework or door/ window openings existed in the composition of timber framed wall and floor components was found to reduce their sound insulation performances in the range of 12-22dB. Air/sound leakages through the openings should be sealed properly in order to provide the required Rw and Lnw values for dwellings. In case that the dwelling units/spaces are used as exhibition, meeting, office or hotel rooms, some acoustical improvements in existing wall and floor components can be provided by demountable attachments with sound insulation infill and sound breaks. Copyright ©(2015) by EAA-NAG-ABAV, ISSN2226-5147 All rights reserved

关键词： Timber

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Magnetoelectric memory function with optical readout

arXiv

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arXiv 2017年

作者： Kocsis, V. Penc, K. Rõõm, T. Nagel, U. Vít, J. Romhányi, J. Tokunaga, Y. Taguchi, Y. Tokura, Y. Kézsmárki, I. Bordács, S. Wako Saitama351-0198 Japan Department of Physics Budapest University of Technology and Economics and MTA-BME Lendület Magneto-optical Spectroscopy Research Group Budapest1111 Hungary Institute for Solid State Physics and Optics Wigner Research Centre for Physics Hungarian Academy of Sciences P.O.B. 49 BudapestH-1525 Hungary National Institute of Chemical Physics and Biophysics Tallinn12618 Estonia Institute of Physics ASCR Na Slovance 2 Prague 8182 21 Eue Faculty of Nuclear Science and Physical Engineering Czech Technical University Břehová 7 Prague 1115 19 Eue Okinawa Institute of Science and Technology Graduate University Onna-sonOkinawa904-0395 Japan Department of Advanced Materials Science University of Tokyo Kashiwa277-8561 Japan Quantum-Phase Electronics Center Department of Applied Physics University of Tokyo Tokyo113-8656 Japan Department of Applied Physics University of Tokyo Hongo Tokyo113-8656 Japan Experimental Physics 5 Center for Electronic Correlations and Magnetism Institute of Physics University of Augsburg Augsburg86159 Germany Hungarian Academy of Sciences Premium Postdoctor Program Budapest1051 Hungary

The ultimate goal of multiferroic research is the development of new-generation non-volatile memory devices1, the so-called magnetoelectric (ME) memories, where magnetic bits are controlled via electric fields without the application of electrical currents subject to dissipation. This low-power operation exploits the entanglement of the magnetization and the electric polarization coexisting in multiferroic materials2,3. Here we demonstrate the optical readout of ME memory states in the antiferromagnetic (AFM) and antiferroelectric (AFE) LiCoPO4, based on the strong absorption difference of THz radiation between its two types of ME domains. This unusual contrast is attributed to the dynamic ME effect of the spin-wave excitations, as confirmed by our microscopic model, which also captures the characteristics of the observed static ME effect. Our proof-of-principle study, demonstrating the control and the optical readout of ME domains in LiCoPO4, lays down the foundation for future ME memory devices based on antiferroelectric-antiferromagnetic insulators. Copyright © 2017, The Authors. All rights reserved.

关键词： Digital storage

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Correction: Interface structure, precursor rheology and dielectric properties of BaTiO3/PVDF–hfp nanocomposite films prepared from colloidal perovskite nanoparticles

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RSC Advances 2017年第73期7卷 45987-45987页

作者： Y. N. Hao K. Bi S. O’Brien X. H. Wang J. Lombardi F. Pearsall W. L. Li M. Lei Y. Wu L. T. Li State Key Laboratory of Information Photonics and Optical Communications School of Science Beijing University of Posts and Telecommunications Beijing 100876 China The Department of Chemistry and Biochemistry The City College of New York The Ph.D. Program in Chemistry The Graduate Center of the City University of New York New York NY 10016 USA State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China School of Journalism and Communication Beijing Normal University Beijing 100875 China

Correction for ‘Interface structure, precursor rheology and dielectric properties of BaTiO3/PVDF–hfp nanocomposite films prepared from colloidal perovskite nanoparticles’ by Y. N. Hao et al., RSC Adv., 2017, 7, 32...

Correction for ‘Interface structure, precursor rheology and dielectric properties of BaTiO₃/PVDF–hfp nanocomposite films prepared from colloidal perovskite nanoparticles’ by Y. N. Hao et al., RSC Adv., 2017, 7, 32886–32892.

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Intrinsic Raman signatures of pristine hybrid perovskite CH3NH3PbI3 and its multiple stages of structure transformation

Intrinsic Raman signatures of pristine hybrid perovskite CH3...

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2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC)

作者： Qiong Chen Henan Liu Hui-Seon Kim Yucheng Liu Mengjin Yang Naili Yue Gang Ren Kai Zhu Shengzhong Frank Liu Nam-Gyu Park Yong Zhang Department of Electrical and Computer Engineering The University of North Carolina at Charlotte Charlotte NC USA Optical Science and Engineering graduate program The University of North Carolina at Charlotte Charlotte NC USA Department of Energy Science Sungkyunkwan University Suwon South Korea National Ministry of Education Shaanxi Normal University Xi'an China Chemical and Materials Science Center National Renewable Energy Laboratory CO USA Molecular Foundry Lawrence Berkeley National Laboratory Berkeley CA USA Key Laboratory of Applied Surface and Colloid Chemistry National Ministry of Education Shaanxi Normal University Xi'an Shaanxi CN School of Chemical Engineering Sungkyunkwan University Suwon South Korea University of North Carolina at Charlotte Charlotte NC US

By performing spatially resolved Raman and photoluminescence spectroscopy with different illumination conditions, we have achieved a unified understanding towards the spectroscopy signatures of the organic-inorganic hybrid perovskite, transforming from the pristine state (CH 3 NH 3 PbI 3 or MAPbI 3 ) to fully degraded state (i.e., PbI 2 ), for samples with varying crystalline domain size from mesoscopic scale to macroscopic size, synthesized by three different techniques.

关键词： Measurement by laser beam Density measurement Chemistry Lighting Optical films Degradation Spectroscopy

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Pyrolytically grown indium sulfide sensitized zinc oxide nanowires for solar water splitting

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Physica Status Solidi (C) Current Topics in Solid State Physics 2015年第9-11期12卷 1251-1255页

作者： Komurcu, Pelin Can, Emre Kaan Aydin, Erkan Semiz, Levent Gurol, Alp Eren Alkan, Fatma Merve Sankir, Mehmet Sankir, Nurdan Demirci Micro and Nanotechnology Graduate Program TOBB University of Economics and Technology Ankara06560 Turkey Department of Materials Science and Nanotechnology Engineering TOBB University of Economics and Technology Ankara06560 Turkey

Zinc oxide (ZnO) nanowires, sensitized with spray pyrolyzed indium sulfide, were obtained by chemical bath deposition. The XRD analysis indicated dominant evolution of hexagonal ZnO phase. Significant gain in photoelectrochemical current using ZnO nanowires is largely accountable to enhancement of the visible light absorption and the formation of heterostructure. The maximum photoconversion efficiency of 2.77% was calculated for the indium sulfide sensitized ZnO nanowire photoelectrodes. (© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

关键词： Spray pyrolysis

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26th Annual Computational Neuroscience Meeting (CNS*2017): Part 3 Antwerp, Belgium. 15-20 July 2017 Abstracts

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BMC NEUROscience 2017年第SUPPL 1期18卷 95-176页

作者： [Anonymous] Department of Neuroscience Yale University New Haven CT 06520 USA Department Physiology & Pharmacology SUNY Downstate Brooklyn NY 11203 USA NYU School of Engineering 6 MetroTech Center Brooklyn NY 11201 USA Departament de Matemàtica Aplicada Universitat Politècnica de Catalunya Barcelona 08028 Spain Institut de Neurobiologie de la Méditerrannée (INMED) INSERM UMR901 Aix-Marseille Univ Marseille France Center of Neural Science New York University New York NY USA Aix-Marseille Univ INSERM INS Inst Neurosci Syst Marseille France Laboratoire de Physique Théorique et Modélisation CNRS UMR 8089 Université de Cergy-Pontoise 95300 Cergy-Pontoise Cedex France Department of Mathematics and Computer Science ENSAT Abdelmalek Essaadi’s University Tangier Morocco Laboratory of Natural Computation Department of Information and Electrical Engineering and Applied Mathematics University of Salerno 84084 Fisciano SA Italy Department of Medicine University of Salerno 84083 Lancusi SA Italy Dipartimento di Fisica Università degli Studi Aldo Moro Bari and INFN Sezione Di Bari Italy Data Analysis Department Ghent University Ghent Belgium Coma Science Group University of Liège Liège Belgium Cruces Hospital and Ikerbasque Research Center Bilbao Spain BIOtech Department of Industrial Engineering University of Trento and IRCS-PAT FBK 38010 Trento Italy Department of Data Analysis Ghent University Ghent 9000 Belgium The Wellcome Trust Centre for Neuroimaging University College London London WC1N 3BG UK Department of Electronic Engineering NED University of Engineering and Technology Karachi Pakistan Blue Brain Project École Polytechnique Fédérale de Lausanne Lausanne Switzerland Departement of Mathematics Swansea University Swansea Wales UK Laboratory for Topology and Neuroscience at the Brain Mind Institute École polytechnique fédérale de Lausanne Lausanne Switzerland Institute of Mathematics University of Aberdeen Aberdeen Scotland UK Department of Integrativ

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Microstructure and Thermal Conductivity of Porous Al2 O3-ZrO2 Ceramics 58th

Microstructure and Thermal Conductivity of Porous Al2 O3-ZrO...

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58th Brazilian Ceramic Conference, CBC 2014

作者： Delbrücke, Tiago Gouvêa, Rogério A. Raubach, Cristiane W. Longo, Elson Sousa, Vânia C. M.tebcheranic, Sergio Kubaski, Evaldo T. Moreira, Mário L. Jurado, Jose R. Cava, Sergio Graduate Program in Science and Materials Engineering Technology Development Center Federal University of Pelotas RS Pelotas96010-900 Brazil Laboratory of Biomaterials & Advanced Ceramics Federal University of Rio Grande do Sul RS Porto Alegre91509-900 Brazil Interdisciplinary Laboratory of Ceramic Materials Ponta Grossa State University PR Ponta Grossa84030-900 Brazil National Institute of Science and Technology of Materials in Nanotechnology Paulista State University SP Araraquara14801-907 Brazil Glass Department Institute of Glass and Ceramic Madrid28049 Spain Institute of Physics and Mathematics Federal University of Pelotas RS Pelotas96010-900 Brazil

The improvement on the development of porous ceramic materials has leaded to new technologies in thermal insulation, for example, composite materials for better performance of pressure vessels in rocket engines. Within this context, the present work aims to evaluate the ability of a refractory ceramic base alumina/zirconia through the processes of co-precipitation and replica method in an organic fiber template. The green body was burnt-out and sintered at 1200-1600°C to obtain the continuous porous ceramic fibers. In the FEG-SEM analysis, an interconnected porous structure with small grains was observed. The crystalline phases were determined by X-ray diffraction and compared to micro-Raman results regarding the crystalline structure confirms that there present in the material zirconia is composed of more than one phase. Porosity was calculated through a mercury porosimeter as 77.9%, and the Laser Flash method gave a thermal conductivity value of 1.61 K W.m−1 .K−1 for the Al2 O3-ZrO2 fibers. © 2015 Trans Tech Publications Ltd, Switzerland.

关键词： Porosity

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Chemical changes in polyetherimide (PEI) joined by friction-based injection clinching joining (F-ICJ) technique

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AIP Conference Proceedings 2016年第1期1779卷

作者： M. Sônego A. B. Abibe J. F. dos Santos L. B. Canto S. T. Amancio-Filho 1Graduate Program in Materials Science and Engineering (PPG-CEM) Federal University of São Carlos (UFSCar) São Carlos SP Brazil 2Helmholtz-Zentrum Geesthacht Centre for Materials and Coastal Research Institute of Materials Research Materials Mechanics Solid State Joining Processes Geesthacht Germany 3Hamburg University of Technology Institute of Polymer Composites Hamburg Germany

The study of new joining technologies for multimaterial structures is motivated by the environmental friendly policy of weight reduction in the automotive industry. Friction-based Injection Clinching Joining (F-ICJ) (European Patent Application EP 14182938.2) is a new staking-based joining technique, which uses frictional heating to produce joints in an energy-efficient and fast manner. In F-ICJ a non-consumable tool applies friction and force to soften or melt and deform a polymeric stud fitted in a through hole of a joining partner. After consolidation, the deformed stud (stake) mechanically joins the partners by creating a staked joint. The thermomechanical process exposes the polymer to high temperatures (250 - 290°C) and deformation rates resulting from the combination of tool rotational speeds of 8000-12000 rpm and short joining cycles (5-10 seconds). Resulting changes in material properties can affect the global performance of the joints. This study aims to investigate the chemical changes occurred in the polymeric partner of hybrid joints on polyetherimide (PEI) and aluminum 6082-T6. Molecular weight distribution (Size-Exclusion Chromatography - SEC) and chemical structure (Fourier transform infrared spectroscopy – FTIR) analyses were performed on the base material and PEI extracted from a joint to evidence any possible chemical changes caused by frictional heating. The polymeric sample from the joint showed number-average molecular weight (Mn) 23% smaller and weight-average molecular weight (Mw) 15% smaller than the PEI base material. FTIR spectra show reduction in the intensity of phthalimide bands owing to the F-ICJ process. Therefore, these analyses identified the extension of chain scission in the PEI caused by shear and heat imposed by F-ICJ process, which are fundamental for process optimization.

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Inside Cover: Nonplanar Butterfly-Shaped π-Expanded Pyrrolopyrroles (Chem. Eur. J. 46/2016)

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Chemistry – A European Journal 2016年第46期22卷 16326-16326页

作者： Maciej Krzeszewski Takuya Kodama Eli M. Espinoza Prof. Dr. Valentine I. Vullev Prof. Dr. Takashi Kubo Prof. Dr. Daniel T. Gryko Institute of Organic Chemistry Polish Academy of Sciences Kasprzaka 44–52 01-224 Warsaw Poland Department of Bioengineering Department of Biochemistry Department of Chemistry and Materials Science and Engineering Program University of California Riverside California 92521 USA Graduate School of Science Osaka University Toyonaka Osaka 560-0043 Japan

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Localized microjetting in the collapse of surface macrocavities

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Physical Review E 2015年第2期91卷 022405-022405页

作者： K. L. Olney P.-H. Chiu D. J. Benson A. Higgins M. Serge V. F. Nesterenko Department of Mechanical and Aerospace Engineering University of California San Diego La Jolla California 92093 Materials Science and Engineering Graduate Program University of California San Diego La Jolla California 92093 Department of Structural Engineering University of California San Diego La Jolla California 92093 Department of Mechanical Engineering McGill University Quebec H3A 0C3 Canada

This paper focuses on the multiscale mechanism of collapse of hemicylindrical annular surface macrocavities in steel caused by high-strain, high-strain rate plastic flow of copper. Experiments and simulations revealed that a two-stage process is responsible for the observed microjetting phenomena: the formation of lateral copper microjets from the localized shear flow in copper at the interface during the filling of the cavity, and their subsequent collision at the apex of the macrocavity generating two additional horizontal microjets. The lengths of these microjets were an order of magnitude smaller than the cavity size but linearly scaled with the cavity radius. This process of microjet development is sensitive to the cavity geometry and is unlike the previously observed jetting phenomena in cavitation, impact crater collapse, or shock-induced cavity collapse.

关键词： VERY light jets SURFACES (Physics) STRAIN rate (materials science) PLASTICITY COPPER METALS -- Mechanical properties

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