检索结果-内蒙古大学图书馆

SSRN 2020年

作者： McCann, Chase D. van Dorp, Christiaan H. Ward, Adam R. Danesh, Ali Dilling, Thomas R. Mota, Talia M. Zale, Elizabeth Patel, Shabnum Brumme, Chanson J. Dong, Winnie Jones, Douglas S. Andresen, Thomas L. Walker, Bruce D. Brumme, Zabrina L. Bollard, Catherine M. Perelson, Alan S. Irvine, Darrell J. Jones, R. Brad Weill Cornell Medicine Belfer Research Building Room 550 413 E 69th Street New YorkNY10021 United States Infectious Diseases Division Department of Medicine Weill Cornell Medical College New YorkNY United States Immunology & Microbial Pathogenesis Graduate Program Weill Cornell Graduate School of Medical Sciences New YorkNY United States Los Alamos National Laboratory Los AlamosNM United States Department of Microbiology Immunology & Tropical Medicine The George Washington University School of Medicine and Health Sciences WashingtonDC United States Milken Institute School of Public Health The George Washington University WashingtonDC United States Center for Cancer and Immunology Research Children’s National Health System WashingtonDC United States GW Cancer Center George Washington University WashingtonDC United States British Columbia Centre for Excellence in HIV/AIDS VancouverBC Canada Repertoire Immune Medicines CambridgeMA United States Ragon Institute of Massachusetts General Hospital MIT & Harvard University BostonMA United States Institute for Medical and Engineering Sciences MIT CambridgeMA United States Howard Hughes Medical Institute Chevy ChaseMD United States Faculty of Health Sciences Simon Fraser University BurnabyBC Canada Department of Material Science and Engineering MIT CambridgeMA United States Koch Institute for Integrative Cancer Research MIT CambridgeMA United States Department of Biological Engineering MIT CambridgeMA United States

HIV-specific CD8 + T-cells partially control viral replication and delay disease progression, but rarely provide lasting protection – largely due to immune escape. We show that engrafting mice with memory CD4+ T-cells from HIV + donors uniquely allows for the in vivo evaluation of autologous T-cell responses, while avoiding graft-versus-host disease and the need for human fetal tissues that limit other models. Treating HIV-infected mice with clinically-relevant HIV-specific T-cell products resulted in substantial reductions in viremia, which were augmented by engineering with IL-15 superagonist-containing nanogels. Ultimately, in vivo activity was limited by the selection of diverse escape mutations, recapitulating patterns seen in humans. By applying mathematical modeling, we show that the kinetics of the CD8 + T-cell response have a profound impact on the emergence and persistence of escape mutations. This ‘participant-derived xenograft’ model of HIV provides a powerful tool for studying HIV-specific immunological responses and facilitating the development of effective cell-based therapies. © 2020, The Authors. All rights reserved.

关键词： T-cells

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

Self-Catalyzed Core-Shell GaAs/GaNAs Nanowires Grown on Patterned Si(111)by Gas-Source Molecular Beam Epitaxy

Self-Catalyzed Core-Shell GaAs/GaNAs Nanowires Grown on Patt...

引用

第十二届全国分子束外延学术会议

作者： Rui La Ren Liu Weichuan Yao Mattias Janssond Shula Chend Janet L.Pan Irina A.Buyanovad S.A.Dayeh Charles W.Tu Graduate Program of Material Science and Engineering University of CaliforniaSan DiegoLa JollaCal Department of Electrical and Computer Engineering University of CaliforniaSan DiegoLa JollaCalifo Department of Physics Chemistry and BiologyLink(o)ping UniversityLink(o)pingSweden 58183 Graduate Program of Material Science and Engineering University of CaliforniaSan DiegoLa JollaCal

Group Ⅲ-Ⅴ semiconductor nanowires(NWs) on Si platform have attracted an increasing interest in recent *** integrating the direct band gap Ⅲ-Ⅴ materials that have high absorption coefficient onto the cost-effective Si platform,it would create novel optoelectronic devices for Si *** advantage of Ⅲ-Ⅴ nanowires grown on Si substrate is that the lattice-match constraint can be relaxed.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Band gap and band alignment prediction of nitride based semiconductors using machine learning

arXiv

引用

arXiv 2018年

作者： Huang, Yang Yu, Changyou Chen, Weiguang Liu, Yuhuai Li, Chong Niu, Chunyao Wang, Fei Jia, Yu International Laboratory for Quantum Functional Materials of Henan School of Physics and Engineering Zhengzhou University Zhengzhou450001 China Materials Science and Engineering Program University of California San Diego La JollaCA92093 United States National Center for International Joint Research of Electronic Materials and Systems School of Information Engineering Zhengzhou University Zhengzhou450001 China Quantum Materials Research Center College of Physics and Electronic Engineering Zhengzhou Normal University Zhengzhou450044 China Institute of Materials and Systems for Sustainability Nagoya University Nagoya464-8603 Japan Key Laboratory for Special Functional Material of Ministry of Education School of Materials Science Henan University Kaifeng475004 China

Nitride has been drawing much attention due to its wide range of applications in optoelectronics and remains plenty of room for materials design and discovery. Here, a large set of nitrides have been designed, with their band gap and alignment being studied by first-principles calculations combined with machine learning. Band gap and band offset against wurtzite GaN accurately calculated by the combination of screened hybrid functional of HSE and DFT-PBE were used to train and test machine learning models. After comparison among different techniques of machine learning, when elemental properties are taken as features, support vector regression (SVR) with radial kernel performs best for predicting both band gap and band offset with prediction root mean square error (RMSE) of 0.298 eV and 0.183 eV, respectively. The former is within HSE calculation uncertainty and the latter is small enough to provide reliable predictions. Additionally, when band gap calculated by DFT-PBE was added into the feature space, band gap prediction RMSE decreases to 0.099 eV. Through a feature engineering algorithm, elemental feature space based band gap prediction RMSE further drops by around 0.005 eV and the relative importance of elemental properties for band gap prediction was revealed. Finally, band gap and band offset of all designed nitrides were predicted and two trends were noticed that as the number of cation types increases, band gap tends to narrow down while band offset tends to go up. The predicted results will be a useful guidance for precise investigation on nitride engineering. Copyright © 2018, The Authors. All rights reserved.

关键词： Energy gap

来源：评论

学校读者我要写书评

暂无评论

Manufacture of low density paper by cationic fatty acid amine bulky promotor treatment (4) - Effect of strength additives on paper strength

引用

Palpu Chongi Gisul/Journal of Korea Technical Association of the Pulp and Paper Industry 2017年第3期49卷 20-27页

作者： Nam, Yun-Seok Choi, Kyoung-Hwa Jin, Hai-Lan Cho, Jun-Hyung Institute of Technology Kuk-Il Paper MFG Co. Ltd. Yongin Korea Republic of Changgang Institute of Paper Science and Technology Kangwon National University Chuncheon24341 Korea Republic of School of Material Science and Technology Northeast Forestry University Harbin China Program of Paper Science and Engineering Division of Forest Material Science and Engineering College of Forest and Environmental Sciences Kangwon National University Chuncheon24341 Korea Republic of

The effects of a strength agent on the properties of handsheets have been investigated during the manufacturing of low density paper (high bulk paper) with cationic fatty acid bulky promotor. Paper strength was improved by the addition of strength agents while properties of handsheets including bulk, opacity, and light scattering coefficient were decreased, in the order of cationic starch, high molecular cationic polyacrylamide, and low molecular polyacrylamide. Namely, the change in mechanical and optical properties of paper by the addition of cationic starch was greater than that of cationic polyacrylamide. Moreover, high molecular cationic polyacrylamide made more effect on the change of paper properties than low molecular cationic polyacrylamide. However it was found that the concentration of strength agents showed almost no relation to the change of paper properties by the addition of strength agent.

关键词： Fatty acids

来源：评论

学校读者我要写书评

暂无评论

Corrigendum: Synthesis and characterization of mordenite-type zeolites with varying Si/Al ratio (2019 Mater. Res. Express 6 015515)

引用

materials Research Express 2018年第3期6卷

作者： Mon Bryan Z Gili Marlon T Conato Material Science and Engineering Program College of Science University of the Philippines Diliman Quezon City Philippines Philippine Nuclear Research Institute—Department of Science and Technology Quezon City Philippines Institute of Chemistry University of the Philippines Diliman Quezon City Philippines

来源：评论

学校读者我要写书评

暂无评论

Spin mediated magneto-electro-thermal transport behavior in Ni80Fe20/MgO/p-Si thin films

arXiv

引用

arXiv 2017年

作者： Lou, P.C. Beyermann, W.P. Kumar, S. Department of mechanical engineering University of California RiversideCA United States Department of physics and astronomy University of California RiversideCA United States Material science and engineering program University of California RiversideCA United States

In Si, spin-phonon interaction is the primary spin relaxation mechanism. At low temperatures, the absence of spin-phonon relaxation will lead to enhanced spin accumulation. Spin accumulation may change the electro-thermal transport within the material, and thus may serve as an investigative tool for characterizing spin-mediated behavior. Here we present the first experimental proof of spin accumulation induced electro-thermal transport behavior in a Pd (1 nm)/Ni80Fe20 (25 nm)/MgO (1 nm)/p-Si (2 µm) specimen. The spin accumulation originates from the spin-Hall effect. The spin accumulation changes the phononic thermal transport in p-Si causing the observed magneto-electro-thermal transport behavior. We also observe the inverted switching behavior in magnetoresistance measurement at low temperatures in contrast to magnetic characterization, which is attributed to the canted spin states in p-Si due to spin accumulation. The spin accumulation is elucidated by current dependent anomalous Hall resistance measurement, which shows a decrease as the electric current is increased. This result may open a new paradigm in the field of spin-mediated transport behavior in semiconductor and semiconductor spintronics. 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

Spin phonon interactions and magneto-thermal transport behavior in p-Si

arXiv

引用

arXiv 2017年

作者： Lou, Paul C. de Sousa Oliveira, Laura Tang, Chi Greaney, Alex Kumar, Sandeep Department of Mechanical Engineering University of California RiversideCA United States Department of Physics and Astronomy University of California RiversideCA United States Material Science and Engineering Program University of California RiversideCA United States

The spin-phonon interaction is the dominant process for spin relaxation in Si, and as thermal transport in Si is dominated by phonons, one would expect spin polarization to influence Si's thermal conductivity. Here we report the experimental evidence of just such a coupling. We have performed concurrent measurements of spin, charge, and phonon transport in p-doped Si across a wide range of temperatures. In an experimental system of a free-standing 2 µm p-Si beam coated on one side with a thin (25 nm) ferromagnetic spin injection layer, we use the self-heating 3ω method to measure changes in electrical and thermal conductivity under the influence of a magnetic field. These magneto-thermal transport measurements reveal signatures in the variation of electrical and thermal transport that are consistent with spin-phonon interaction. Raman spectroscopy measurements and first principle's calculations support that these variations are due to spin-phonon interaction. Spin polarization leads to softening of phonon modes, a reduction in the group velocity of acoustic modes, and a subsequent decrease in thermal conductivity at room temperature. Moreover, magneto-thermal transport measurements as a function of temperature indicate a change in the spin-phonon relaxation behavior low temperature. Copyright © 2017, The Authors. All rights reserved.

关键词： Silicon

来源：评论

学校读者我要写书评

暂无评论

Effect of compaction pressure of green body and heating current on photoluminescence property of ZnO crystal grown by electric current heating method

引用

IOP Conference Series: materials science and engineering 2018年第1期290卷

作者： A G E Sutjipto M H Mazwir H L Yee S R Misskon A G M Shaitir M A Jusoh R Othman Material Technology Program Faculty of Industrial Sciences & Technology Universiti Malaysia Pahang (UMP) Gambang 26300 Pahang Malaysia Department of Science in Engineering Faculty of Engineering International Islamic University Malaysia (IIUM) Jalan Gombak 53300 Kuala Lumpur Malaysia

In this study, we reported the effect of applied compaction pressure on green body and electric current heating on ceramic bar on the ZnO crystal growth and its photoluminescence characteristic. Crystals grown on ZnO bar sintered by 1100 °C were mostly on (1 0 1) orientation. Sample with 3.0 ton and 3.0 A for applied pressure and current, respectively revealed the shortest photoluminescence (PL) wavelength of 409.5 nm with highest emission energy of 3.03 eV.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Smartphone based colorimetric detection via machine learning

arXiv

引用

arXiv 2017年

作者： Mutlu, Ali Y. Kılıç, Volkan Özdemir, Gizem K. Bayram, Abdullah Horzum, Nesrin Solmaz, Mehmet E. Department of Electrical and Electronics Engineering Izmir Katip Celebi University Izmir Turkey Nanoscience and Nanotechnology Program Izmir Katip Celebi University Izmir Turkey Department of Material Science and Engineering Izmir Katip Celebi University Izmir Turkey Department of Engineering Sciences Izmir Katip Celebi University Izmir Turkey

We report the application of machine learning to smartphone based colorimetric detection of pH values. The strip images were used as the training set for Least Squares-Support Vector Machine (LS-SVM) classifier algorithms that were able to successfully classify the distinct pH values. The difference in the obtained image formats was found not to significantly affect the performance of the proposed machine learning approach. Moreover, the influence of the illumination conditions on the perceived color of pH strips was investigated and further experiments were carried out to study effect of color change on the learning model. Test results on JPEG, RAW and RAW-corrected image formats captured in different lighting conditions lead to perfect classification accuracy, sensitivity and specificity, which proves that the colorimetric detection using machine learning based systems is able to adapt to various experimental conditions and is a great candidate for smartphone based sensing in paper-based colorimetric assays. Copyright © 2017, The Authors. All rights reserved.

关键词： Smartphones

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：