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HIGHLY TRANSPARENT AND CONDUCTING ZINC-OXIDE FILMS DEPOSITED BY ACTIVATED REACTIVE EVAPORATION

JOURNAL OF ELECTRONIC MATERIALS 1987年第3期16卷 141-149页

作者： LAU, WS FONASH, SJ 1. Center for Electronic Materials and Devices Engineering Science Program The Pennsylvania State University 16802 University Park PA

Highly transparent and conducting undoped zinc oxide films have been obtained with a best resistivity of ～1.1.1.; 1.-3 Ω cm, a carrier density of ～1.5 1.; 1.20 cm?3 and a mobility of ～38 cm2V?1. ?1. These we... 详细信息

Highly transparent and conducting undoped zinc oxide films have been obtained with a best resistivity of ～1.1.× 1.^-3 Ω cm, a carrier density of ～1.5 × 1.²⁰ cm^?3 and a mobility of ～38 cm²V^?1. ^{?1./sup>. These were produced by activated reactive evaporation at a deposition rate of 2 to 8?/s with a substrate temperature ≤200° C. The films deposited by this process were found to have resistivities that were thickness independent and also were relatively insensitive to deposition parameters. In terms of conductivity, it was found that films deposited at higher temperatures (T > 300°+ C) were always inferior to the films deposited below 200° C. High temperature vacuum annealing (350° C) significantly degraded the resistivity of the undoped films deposited at low temperature; this was attributable to a drop in both the electron concentration and the mobility. Aluminum doping was found to be able to stabilize the electron concentration while the drop in mobility was found to be related to the choice of substrate.}

关键词： Zinc oxide films highly transparent films conducting films high temperature stability

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ELECTROPHORETIC DEPOSITION AND ITS USE TO SYNTHESIZE ZRO2/AL2O3 MICRO-LAMINATE ceramic-ceramic COMPOSITES

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JOURNAL OF MATERIALS science 1993年第23期28卷 6274-6278页

作者： NICHOLSON, PS SARKAR, P HUANG, X 1. Ceramic Engineering Research Group Department of Materials Science and Engineering McMaster University L8S 4L7 Hamilton Ontario Canada

Electrophoretic deposition has been employed to synthesize yttria-stabilized zirconia (YSZ)/alumina, laminar microcomposites with a total of 80 layers, > 2 mm. 1. wt% solids, ethanol suspensions of YSZ or Al2O3 powders were deposited layer by layer. The deposited samples had a green density, approximately 60% theoretical. The deposition process was characterized by the rate-of-deposition as a function of voltage and the microstructure of the sintered, theoretically dense samples was characterized by optical and electron microscopy. Microindentation was used to explore the mechanical properties of the laminates.

关键词： Laminated composites

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DEVITRIFICATION MECHANISM IN CDSIAS2 GLASSES

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JOURNAL OF MATERIALS science LETTERS 1991年第3期10卷 161-163页

作者： SHARMA, S SPEYER, RF 1. Division of Ceramic Engineering and Science New York State College of Ceramics Alfred University 14802 Alfred New York USA

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FEASIBILITY ISSUES IN A PRIMAL DUAL INTERIOR-POINT METHOD FOR LINEAR-programMING

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MATHEMATICAL programMING 1990年第2期49卷 145-162页

作者： LUSTIG, IJ 1. Program in Statistics and Operations Research Department of Civil Engineering and Operations Research School of Engineering and Applied Science Princeton University 08544 Princeton NJ USA

A new method for obtaining an initial feasible interior-point solution to a linear program is presented. This method avoids the use of a "big-M", and is shown to work well on a standard set of test problems. Conditions are developed for obtaining a near-optimal solution that is feasible for an associated problem, and details of the computational testing are presented. Other issues related to obtaining and maintaining accurate feasible solutions to linear programs with an interior-point method are discussed. These issues are important to consider when solving problems that have no primal or dual interior-point feasible solutions.

关键词： LINEAR programMING INTERIOR-POINT METHODS PRIMAL-DUAL ALGORITHMS FEASIBILITY

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MELTING-POINT ELEVATION IN COMPATIBLE POLYMER BLENDS

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POLYMER BULLETIN 1984年第6期11卷 517-521页

作者： RUNT, J RIM, PB HOWE, SE 1. Polymer Science Program Department of Materials Science and Engineering The Pennsylvania State University 16802 University Park PA USA

An expression is presented which relates the experimentally observed melting point depression in crystallizable, compatible polymer blends to changes in lamellar thickness and thermodynamic considerations.

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BINATIONAL MANAGEMENT OF HAZARDOUS-WASTE - THE MAQUILADORA INDUSTRY AT THE UNITED-STATES MEXICO BORDER

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ENVIRONMENTAL MANAGEMENT 1990年第4期14卷 441-450页

作者： PERRY, DM SANCHEZ, R GLAZE, WH MAZARI, M 1. Environmental Science and Engineering Program School of Public Health University of California 90024-1772 Los Angeles California USA

Foreign-owned industry in the form of assembly plants, termed maquiladora, has become very important in Mexico to the extent that it represents the second largest source of foreign exchange and is a valuable source for employment and regional development. The economic prosperity gained from the rapid growth of the maquiladora industry has been accomapanied by increased environmental and human health risks associated with generation of hazardous waste. Diversification of industry has resulted in the predomination of those sectors that likely use hazardous substances. The Mexicali-Calexico border region was selected to demonstrate the potential for environmental and health risks associated with the generation of hazardous waste. Estimates for the generation of hazardous waste were obtained from 34 maquiladora plants in Mexicali, represented by the electronic and electronic equipment and parts, mechanical and transportation equipment, and toys and sporting equipment sectors. Repeated detection of volatile organic compounds in the New River at the US-Mexico border suggests that hazardous waste from the printed circuit board industry in Mexicali is not being disposed of in a proper manner. Potential adverse health effects, such as carcinogenic and mutagenic responses associated with the detected volatiles, are discussed. US and Mexico national legislation and the Binational Environmental Agreement were examined for their adequacy to ensure proper management of hazardous waste generated by the maquiladora industry. Environmental policy options are presented that focus on: (1. increased environmental accountability of US parent companies for their maquiladora assembly plants in Mexico;and (2) more integration between US Customs and border states with the US Environmental Protection Agency to improve the binational management of hazardous waste generated by the maquiladora industry.

关键词： Hazardous waste Maquiladora industry Environmental policy US-Mexico border

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THE INTERACTION OF 2 OPPOSING, ASYMMETRIC CURVED WALL JETS

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EXPERIMENTS IN FLUIDS 1988年第4期6卷 243-252页

作者： REW, HS PARK, SO 1. Dept. of Mechanical Engineering Aerospace Program Korea Advanced Institute of Science and Technology P.O. Box 150 Cheong Ryang Seoul Korea

An experimental investigation was made of a two dimensional flow formed by the interaction of two asymmetric turbulent curved wall jets past a circular cylinder. Measurements were made of velocity and turbulence intensity profiles of the two curved wall jets before the interaction, and those of the merged jet after the interaction. The location of the interaction region of the two opposing curved wall jets and the flow direction of the merged jet were found to depend primarily on the ratio of initial momentum fluxes. The velocity and turbulence intensity profiles of the merged jet were similar to those of the plane turbulent jet. However, the growth rate of the merged jet was approximately 1.5 times larger than that of the plane jet. The influence of the momentum flux ratio on the growth rate appeared to be insignificant.

关键词： FLOW OF FLUIDS

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ELECTRICAL-PROPERTIES OF YTTRIUM-ALUMINUM-SILICON OXYNITRIDE GLASSES

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JOURNAL OF THE AMERICAN ceramic SOCIETY 1980年第3-4期63卷 190-193页

作者： LEEDECKE, CJ LOEHMAN, RE Sandia Laboratories Albuquerque New Mexico 87185 Member the American Ceramic Society. At the time this work was done R. E. Loehman was on sabbatical leave from the Department of Materials Science and Engineering University of Florida Gainesville Florida 3261 1. He is now with SRI International Menlo Park California 94025.

The ac electrical properties of several Y-Al-Si oxynitride glasses were measured as a function of temperature at 20&#1.6; to 625&#1.6;C in the frequency range 50 to 1. 5 Hz. The low-field dc conductivity was also dete...

The ac electrical properties of several Y-Al-Si oxynitride glasses were measured as a function of temperature at 20° to 625°C in the frequency range 50 to 1. 5 Hz. The low-field dc conductivity was also determined. Dispersions in the dielectric constant associated with the peaks in the tan δ curves were observed in all cases. The peaks in tan δ shifted to higher frequencies with increasing temperature. Below ∼400°C, the ac conductivity was proportional to ω n with 0.5< n

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Controlling the sliding motion of cyclodextrins in the polyrotaxane of PEI-b-PEG-b-PEI copolymer

Controlling the sliding motion of cyclodextrins in the polyr...

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54th SPSJ Annual Meeting 2005

作者： Choi, Hak Soo Yamamoto, Kaori Lee, Sang Cheon Ooya, Tooru Yui, Nobuhiko School of Materials Science Japan Advanced Institute of Science and Technology 1-1 Asahidai Nomi Ishikawa 923-1292 Japan 21St Century COE Program Japan Advanced Institute of Science and Technology 1-1 Asahidai Nomi Ishikawa 923-1292 Japan Korea Institute of Ceramic Engineering and Technology 233-5 Gasan Guemcheon Seoul 153-801 Korea Republic of

Our aim here is to synthesize a water-soluble polyrotaxane for examining the pH-responsive movement of CDs along the chains of PEI-b-PEG-b-PEI copolymer. Since the components of the polyrotaxane are held together by noncovalent bonds, the mobility of the cyclic compound could be controlled at the molecular level in aqueous solutions.

关键词： Oligomers

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Search for Continuous Gravitational Waves from Known Pulsars in the First Part of the Fourth LIGO-Virgo-KAGRA Observing Run

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Astrophysical Journal 2025年第2期983卷 99-99页

作者： Abac, A.G. Abbott, R. Abouelfettouh, I. Acernese, F. Ackley, K. Adhicary, S. Adhikari, N. Adhikari, R.X. Adkins, V.K. Agarwal, D. Agathos, M. Aghaei Abchouyeh, M. Aguiar, O.D. Aguilar, I. Aiello, L. Ain, A. Ajith, P. Akutsu, T. Albanesi, S. Alfaidi, R.A. Al-Jodah, A. Alléné, C. Allocca, A. Al-Shammari, S. Altin, P.A. Alvarez-Lopez, S. Amato, A. Amez-Droz, L. Amorosi, A. Amra, C. Ananyeva, A. Anderson, S.B. Anderson, W.G. Andia, M. Ando, M. Andrade, T. Andres, N. Andrés-Carcasona, M. Andrić, T. Anglin, J. Ansoldi, S. Antelis, J.M. Antier, S. Aoumi, M. Appavuravther, E.Z. Appert, S. Apple, S.K. Arai, K. Araya, A. Araya, M.C. Areeda, J.S. Argianas, L. Aritomi, N. Armato, F. Arnaud, N. Arogeti, M. Aronson, S.M. Ashton, G. Aso, Y. Assiduo, M. Assis de Souza Melo, S. Aston, S.M. Astone, P. Attadio, F. Aubin, F. AultONeal, K. Avallone, G. Babak, S. Badaracco, F. Badger, C. Bae, S. Bagnasco, S. Bagui, E. Baier, J.G. Baiotti, L. Bajpai, R. Baka, T. Ball, M. Ballardin, G. Ballmer, S.W. Banagiri, S. Banerjee, B. Bankar, D. Baral, P. Barayoga, J.C. Barish, B.C. Barker, D. Barneo, P. Barone, F. Barr, B. Barsotti, L. Barsuglia, M. Barta, D. Bartoletti, A.M. Barton, M.A. Bartos, I. Basak, S. Basalaev, A. Bassiri, R. Basti, A. Bates, D.E. Bawaj, M. Baxi, P. Bayley, J.C. Baylor, A.C. Baynard, P.A. Bazzan, M. Bedakihale, V.M. Beirnaert, F. Bejger, M. Belardinelli, D. Bell, A.S. Benedetto, V. Benoit, W. Bentley, J.D. Ben Yaala, M. Bera, S. Berbel, M. Bergamin, F. Berger, B.K. Bernuzzi, S. Beroiz, M. Bersanetti, D. Bertolini, A. Betzwieser, J. Beveridge, D. Bevins, N. Bhandare, R. Bhardwaj, U. Bhatt, R. Bhattacharjee, D. Bhaumik, S. Bhowmick, S. Bianchi, A. Bilenko, I.A. Billingsley, G. Binetti, A. Bini, S. Birnholtz, O. Biscoveanu, S. Bisht, A. Bitossi, M. Bizouard, M.-A. Blackburn, J.K. Blagg, L.A. Blair, C.D. Blair, D.G. Bobba, F. Bode, N. Boileau, G. Boldrini, M. Bolingbroke, G.N. Bolliand, A. Bonavena, L.D. Bondarescu, R. Bondu, F. Bonilla, E. Bonilla, M.S. Bonino, A. Bonnand, R. Booker, P. Borchers, A. Boschi, V. Bose, S. Boss Max Planck Institute for Gravitational Physics (Albert Einstein Institute) Potsdam D-14476 Germany LIGO Laboratory California Institute of Technology Pasadena 91125 CA United States LIGO Hanford Observatory Richland 99352 WA United States Dipartimento di Farmacia Università di Salerno Fisciano Salerno I-84084 Italy INFN Sezione di Napoli Napoli I-80126 Italy University of Warwick Coventry CV 47AL United Kingdom The Pennsylvania State University University Park 16802 PA United States University of Wisconsin-Milwaukee Milwaukee 53201 WI United States Louisiana State University Baton Rouge 70803 LA United States Université Catholique de Louvain Louvain-la-Neuve B-1348 Belgium Inter-University Centre for Astronomy and Astrophysics Pune 411007 India Queen Mary University of London London E1 4NS United Kingdom Department of Physics and Astronomy Sejong University 209 Neungdong-ro Gwangjin-gu Seoul 143-747 South Korea Instituto Nacional de Pesquisas Espaciais São José dos Campos São Paulo 12227-010 Brazil Stanford University Stanford 94305 CA United States Università di Roma Tor Vergata Roma I-00133 Italy INFN Sezione di Roma Tor Vergata Roma I-00133 Italy Cardiff University Cardiff CF24 3AA United Kingdom Universiteit Antwerpen Antwerpen 2000 Belgium International Centre for Theoretical Sciences Tata Institute of Fundamental Research Bengaluru 560089 India Gravitational Wave Science Project National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka City Tokyo 181-8588 Japan Advanced Technology Center National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka City Tokyo 181-8588 Japan INFN Sezione di Torino Torino I-10125 Italy Theoretisch-Physikalisches Institut Friedrich-Schiller-Universität Jena Jena D-07743 Germany Dipartimento di Fisica Università degli Studi di Torino Torino I-10125 Italy SUPA University of Glasgow Glasgow G12 8QQ United Kingdom OzGrav University of Western Australia Crawley 6009 WA

Continuous gravitational waves (CWs) emission from neutron stars carries information about their internal structure and equation of state, and it can provide tests of general relativity. We present a search for CWs from a set of 45 known pulsars in the first part of the fourth LIGO-Virgo-KAGRA observing run, known as O4a. We conducted a targeted search for each pulsar using three independent analysis methods considering single-harmonic and dual-harmonic emission models. We find no evidence of a CW signal in O4a data for both models and set upper limits on the signal amplitude and on the ellipticity, which quantifies the asymmetry in the neutron star mass distribution. For the single-harmonic emission model, 29 targets have the upper limit on the amplitude below the theoretical spin-down limit. The lowest upper limit on the amplitude is 6.4 × 1.^-27 for the young energetic pulsar J0537-691., while the lowest constraint on the ellipticity is 8.8 × 1.^-9 for the bright nearby millisecond pulsar J0437-471.. Additionally, for a subset of 1. targets, we performed a narrowband search that is more robust regarding the emission model, with no evidence of a signal. We also found no evidence of nonstandard polarizations as predicted by the Brans-Dicke theory. © 2025. The Author(s). Published by the American Astronomical Society.

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