检索结果-内蒙古大学图书馆

New materials and Processes Developed for Cranioplasty

IOP Conference Series: materials science and engineering 2020年第1期877卷

作者： I M Mates A Semenescu S I Dumitrescu R Vidu University POLITEHNICA of Bucharest Faculty of Materials Science and Engineering Splaiul Independentei nr.313 Bucharest Romania Central University Emergency Military Hospital Bucharest Romania University of California Davis Department of Electrical and Computer Engineering Davis CA 95616 USA

Traumatic brain injury is the leader in the ranking of mortality and invalidity. The surgical repair of a defect of the skull by cranioplasty has been practiced since ancient times, when materials of non-biological origin were used for this purpose. New materials and processes are sought to improve osseintegration of implants. Like any surgical procedure, cranioplasty involves complications that may be related to the surgical technique and/or to the patient's tolerance to the material used. This work described a biocompatible medical device that include two supported meshes for providing mechanical strength and osseointegration properties of the implant, and a multiplayer porous material in between them that is loaded with the required bioactive antibacterial compound to promote a controlled and sustained release of the pharmaceutical agents at the site of surgical intervention. To increase osseointegration, meshes are designed with an open structure and coated with biocompatible materials such as hydroxyapatite. The composition gradient in the multilayer porous material is attained by loading successive layers of porous material with different amounts of bioactive materials and then stacking them to create a gradient of composition across the porous material.

关键词：

来源：评论

学校读者我要写书评

暂无评论

The redshirt in engineering consortium: Progress and early insights 125

The redshirt in engineering consortium: Progress and early i...

引用

125th ASEE Annual Conference and Exposition

作者： Riskin, Eve A. Milford, Jana Callahan, Janet Cosman, Pamela Schneider, John B. Pitts, Kevin Knaphus-Soran, Emily Llewellyn, Donna C. Delaney, Ann E. Myers, Beth A. Tetrick, Katherine Christine Cunningham, Sonya Ennis, Tanya D. O'Connor, Kevin Ferrez, Michelle Pan, Tiffany D. Baldis, Jessica EE Department University of Washington United States Engineering GoldShirt Program University of Colorado Boulder United States Micron School of Materials Science and Engineering Boise State University United States Department of Electrical and Computer Engineering University of California San Diego United States Voiland College of Engineering and Architecture United States Department of Physics University of Illinois Urbana-Champaign United States University of Washington United States Institute for STEM and Diversity Initiatives Boise State University United States Public Policy and Administration Boise State University United States Department of Analytics Assessment and Accreditation University of Colorado Boulder United States Program Washington State University United States University of Washington STARS Program Diversity and Access College of Engineering United States Engineering GoldShirt Program University of Colorado Boulder College of Engineering and Applied Science United States Department of Educational Psychology and Learning Sciences University of Colorado Boulder United States United States

The NSF-funded Redshirt in engineering Consortium was formed in 2016 with the goal of enhancing the ability of academically talented but underprepared students coming from low-income backgrounds to successfully graduate with engineering degrees. The Consortium takes its name from the practice of redshirting in college athletics, with the idea of providing an extra year and support to help promising engineering students complete a bachelor's degree. The Consortium builds on the success of three existing "academic redshirt" programs and expands the model to three new schools. The Existing Redshirt Institutions (ERIs) help mentor and train the new Student Success Partners (SSPs), and SSPs contribute their unique expertise to help ERIs improve existing Redshirt programs. The Redshirt model consists of seven main programmatic components aimed at improving the engagement, retention, and graduation of students underrepresented in engineering. These components include: "intrusive" academic advising and support services, an intensive first-year academic curriculum, community-building (including pre-matriculation summer programs), career awareness and vision, faculty mentorship, NSF S-STEM scholarships, and second-year support. Successful implementation of these activities is intended to produce two main long-term outcomes: a six-year graduation rate of 60%-75% for Redshirt students, and increased rates of enrollment and graduation of Pell-eligible, URM, and women students in engineering at participating universities. In the first year of the grant (AY 16-17), SSPs developed their own Redshirt programs, hired and trained staff, and got their programs off the ground. ERIs implemented faculty mentorship programs and expanded support to Redshirt students into their sophomore year. In the second year (AY 17-18), Redshirt programs were expanded at the ERIs while SSPs welcomed their first cohorts of Redshirt students. This Work in Progress paper describes the Redshirt programs at e

关键词：

来源：评论

学校读者我要写书评

暂无评论

Enhancing interconnect reliability and performance by converting tantalum to 2D layered tantalum sulfide at low temperature

arXiv

引用

arXiv 2019年

作者： Lo, Chun-Li Catalano, Massimo Khosravi, Ava Ge, Wanying Ji, Yujin Zemlyanov, Dmitry Y. Wang, Luhua Addou, Rafik Liu, Yuanyue Wallace, Robert M. Kim, Moon J. Chen, Zhihong School of Electrical and Computer Engineering Purdue University West LafayetteIN47907 United States Birck Nanotechnology Center Purdue University West LafayetteIN47907 United States Materials Science and Engineering Department University of Texas at Dallas 800 West Campbell Road RichardsonTX75080 United States Via Monteroni ed. A3 Lecce73100 Italy Texas Materials Institute Department of Mechanical Engineering University of Texas at Austin AustinTX78712 United States

The interconnect half-pitch size will reach ~20 nm in the coming sub-5 nm technology node. Meanwhile, the TaN/Ta (barrier/liner) bilayer stack has to be > 4 nm to ensure acceptable liner and diffusion barrier properties. Since TaN/Ta occupy a significant portion of the interconnect cross-section and they are much more resistive than Cu, the effective conductance of an ultra-scaled interconnect will be compromised by the thick bilayer. Therefore, two dimensional (2D) layered materials have been explored as diffusion barrier alternatives. However, many of the proposed 2D barriers are prepared at too high temperatures to be compatible with the back-end-of-line (BEOL) technology. In addition, as important as the diffusion barrier properties, the liner properties of 2D materials must be evaluated, which has not yet been pursued. Here, a 2D layered tantalum sulfide (TaSx) with ~1.5 nm thickness is developed to replace the conventional TaN/Ta bilayer. The TaSx ultra-thin film is industry-friendly, BEOL-compatible, and can be directly prepared on dielectrics. Our results show superior barrier/liner properties of TaSx compared to the TaN/Ta bilayer. This single-stack material, serving as both a liner and a barrier, will enable continued scaling of interconnects beyond 5 nm node. Copyright © 2019, The Authors. All rights reserved.

关键词： Temperature

来源：评论

学校读者我要写书评

暂无评论

Graphene Hinges: Assembly of Foldable 3D Microstructures Using Graphene Hinges (Adv. Mater. 28/2020)

引用

Advanced materials 2020年第28期32卷

作者： Seungyun Lim Haiwen Luan Shiwei Zhao Yongjun Lee Yihui Zhang Yonggang Huang John A. Rogers Jong‐Hyun Ahn School of Electrical and Electronic Engineering Yonsei University Seoul 03722 Republic of Korea Departments of Mechanical Engineering Civil and Environmental Engineering Materials Science and Engineering Northwestern University Evanston IL 60208 USA Querrey Simpson Institute for Bioelectronics Northwestern University Evanston IL 60208 USA School of Aeronautic Science and Engineering Beihang University Beijing 100191 P. R. China Applied Mechanics Laboratory Department of Engineering Mechanics Center for Flexible Electronics Technology Tsinghua University Beijing 100084 P. R. China Departments of Materials Science and Engineering Biomedical Engineering Neurological Surgery Electrical and Computer Engineering Mechanical Engineering Chemistry Northwestern University Evanston IL 60208 USA

来源：评论

学校读者我要写书评

暂无评论

Carbon Nanotubes: Colors of Single-Wall Carbon Nanotubes (Adv. Mater. 8/2021)

引用

Advanced materials 2021年第8期33卷

作者： Nan Wei Ying Tian Yongping Liao Natsumi Komatsu Weilu Gao Alina Lyuleeva-Husemann Qiang Zhang Aqeel Hussain Er-Xiong Ding Fengrui Yao Janne Halme Kaihui Liu Junichiro Kono Hua Jiang Esko I. Kauppinen Department of Applied Physics Aalto University School of Science Aalto 00076 Finland Department of Physics Dalian Maritime University Dalian 116026 China Department of Electrical and Computer Engineering Rice University Houston TX 77005 USA School of Physics Academy for Advanced Interdisciplinary Studies Collaborative Innovation Center of Quantum Matter Peking University Beijing 100871 China Department of Physics and Astronomy Rice University Houston TX 77005 USA Department of Materials Science and NanoEngineering Rice University Houston TX 77005 USA

来源：评论

学校读者我要写书评

暂无评论

Reducing Student Resistance to Active Learning: Strategies for Instructors

引用

Journal of College science Teaching 2018年第5期47卷 80-91页

作者： Finelli, Cynthia J. Nguyen, Kevin DeMonbrun, Matthew Borrego, Maura Prince, Michael Husman, Jenefer Henderson, Charles Shekhar, Prateek Waters, Cynthia K. Engineering Education Research Program Department of Electrical Engineering and Computer Science School of Education University of Michigan Ann Arbor United States STEM education University of Texas at Austin United States School of Education University of Michigan Ann Arbor United States Center for Engineering Education Department of Mechanical Engineering STEM education University of Texas at Austin United States Chemical Engineering Department Bucknell University in Lewisburg PA United States University of Oregon in Eugene United States Mallinson Institute for Science Education Western Michigan University in Kalamazoo United States Department of Biomedical Engineering University of Michigan in Ann Arbor United States Department of Mechanical Engineering North Carolina A and T State University in Greensboro United States

In spite of considerable evidence of the effectiveness of active learning and other contemporary teaching methods, barriers to adoption of those methods, such as possible student resistance, continue to exist. This study addresses student resistance by analyzing data from 1,051 students who completed our Student Response to Instructional Practices (StRIP) instrument in 18 introductory engineering courses where active learning was implemented. Through descriptive statistics, correlation analyses, and hierarchical linear regression modeling, we demonstrate that students ‘perceptions of their instructors’ use of explanation and facilitation strategies can have a significant impact on student resistance. This study provides a more complete picture of the relative efficacy of these strategies to reduce resistance and confirms that students ‘perceptions of their instructors’ use of these strategies can influence both how students engage with active learning and how students evaluate the course and instructor. We provide evidencebased advice for both new and experienced instructors to reduce student resistance to active learning and other contemporary teaching methods. © 2018 National science Teaching Association.

关键词： Active learning Teaching methods Student attitudes Perceptions

来源：评论

学校读者我要写书评

暂无评论

Universal research index: An inclusive metric to quantify scientific research output

引用

Journal of Academic Librarianship 2023年第3期49卷

作者： Keshavarz-Fathi, Mahsa Yazdanpanah, Niloufar Kolahchi, Sajad Ziaei, Heliya Darmstadt, Gary L. Dorigo, Tommaso Dochy, Filip Levin, Lisa Thongboonkerd, Visith Ogino, Shuji Chen, Wei-Hsin Perc, Matjaz Tremblay, Mark S. Olusanya, Bolajoko O. Rao, Idupulapati M. Hatziargyriou, Nikos Moradi-Lakeh, Maziar Bella, Federico Rosivall, Laszlo Gandomi, Amir H. Sorooshian, Armin Gupta, Manoj Gal, Ciprian Lozano, Andres M. Weaver, Connie Tanzer, Michael Poggi, Alessandro Sepanlou, Sadaf G. Weiskirchen, Ralf Jambrak, Anet Režek Torres, Pedro J. Capanoglu, Esra Barba, Francisco J. Ernest, Chua Kian Jon Sigman, Mariano Pluchino, Stefano Gharehpetian, Gevork B. Fereshtehnejad, Seyed-Mohammad Yang, Muh-Hwa Thomas, Sabu Cai, Wenju Comini, Elisabetta Scolding, Neil J. Myles, Paul S. Nieto, Juan J. Perry, George Sedikides, Constantine Rezaei, Nima School of Medicine Tehran University of Medical Sciences Tehran Iran Universal Scientific Education and Research Network (USERN) Iran Department of Pediatrics Stanford University School of Medicine Stanford CA United States Istituto Nazionale di Fisica Nucleare (INFN) Via Francesco Marzolo Sezione di Padova Italy High Impact Learning Academy Learning and Development Department Brussels Belgium Center for Marine Biodiversity and Conservation Integrative Oceanography Division Scripps Institution of Oceanography University of California San Diego San Diego CA United States Medical Proteomics Unit Office for Research and Development Faculty of Medicine Siriraj Hospital Mahidol University Bangkok Thailand Department of Epidemiology Harvard T.H. Chan School of Public Health Boston MA United States Program in MPE Molecular Pathological Epidemiology Department of Pathology Brigham and Women's Hospital and Harvard Medical School Boston MA United States Broad Institute of MIT and Harvard Cambridge MA United States Department of Aeronautics and Astronautics National Cheng Kung University Tainan Taiwan Research Center for Smart Sustainable Circular Economy Tunghai University Taichung 407 Taiwan Department of Mechanical Engineering National Chin-Yi University of Technology Taichung 411 Taiwan Faculty of Natural Sciences and Mathematics University of Maribor Maribor Slovenia Department of Medical Research China Medical University Hospital China Medical University Taichung Taiwan Complexity Science Hub Vienna Vienna Austria Alma Mater Europaea Maribor Slovenia Children's Hospital of Eastern Ontario Research Institute Department of Pediatrics University of Ottawa Ottawa ON Canada Centre for Healthy Start Initiative Ikoyi Lagos Nigeria Alliance of Bioversity International International Center for Tropical Agriculture Cali Colombia International Centre of Insect Physiology and Ecology (ICIPE) Nairobi Kenya School of Electrical and Computer Engineering Natio

Scientometrics and bibliometrics, the subfields of library and information science, deal with the quantity and quality of research outputs. Currently, various scientometric indices are being used to quantify and compare research outputs. The most widely known is the h-index. However, this index and its derivatives suffer from dependence on the mere count of a scholar's highly cited publications. To remedy this deficiency, we developed a novel index, the Universal Research Index (UR-Index) (https://***/UR-Index/) by which every single publication has its own impact on the total score. We developed this index by surveying international top 1 % cited scientists in various disciplines and included additional component variables such as publication type, leading role of a scholar, co-author count, and source metrics to this scientometric index. We acknowledge that unconscious biases built into the component variables included in the UR-Index might put research from specific groups at a disadvantage, thus continued efforts to improve equitable scholarly impact in science and academia are encouraged. © 2023 Elsevier Inc.

关键词： Citations CiteScore h-index Impact factor Leading author Research impact Scholarly impact Scholarly output Scientometrics UR-Index USERN

来源：评论

学校读者我要写书评

暂无评论

Tuning Insulator-Semimetal Transitions in 3D Topological Insulator thin Films by Intersurface Hybridization and In-Plane Magnetic Fields

引用

Physical Review Letters 2019年第20期123卷 207701-207701页

作者： Yang Xu Guodong Jiang Ireneusz Miotkowski Rudro R. Biswas Yong P. Chen Department of Physics and Astronomy Purdue University West Lafayette Indiana 47907 USA Birck Nanotechnology Center Purdue University West Lafayette Indiana 47907 USA Purdue Quantum Science and Engineering Institute Purdue University West Lafayette Indiana 47907 USA School of Electrical and Computer Engineering Purdue University West Lafayette Indiana 47907 USA WPI-AIMR International Research Center for Materials Sciences Tohoku University Sendai 980-8577 Japan

A pair of Dirac points (analogous to a vortex-antivortex pair) associated with opposite topological numbers (with ±π Berry phases) can be merged together through parameter tuning and annihilated to gap the Dirac spectrum, offering a canonical example of a topological phase transition. Here, we report transport studies on thin films of BiSbTeSe2, which is a 3D topological insulator that hosts spin-helical gapless (semimetallic) Dirac fermion surface states for sufficiently thick samples, with an observed resistivity close to h/4e2 at the charge neutral point. When the sample thickness is reduced to below ∼10 nm thick, we observe a transition from metallic to insulating behavior, consistent with the expectation that the Dirac cones from the top and bottom surfaces hybridize (analogous to a “merging” in the real space) to give a trivial gapped insulator. Furthermore, we observe that an in-plane magnetic field can drive the system again towards a metallic behavior, with a prominent negative magnetoresistance (up to ∼−95%) and a temperature-insensitive resistivity close to h/2e2 at the charge neutral point. The observation is consistent with a predicted effect of an in-plane magnetic field to reduce the hybridization gap (which, if small enough, may be smeared by disorder and give rise to a metallic behavior). A sufficiently strong magnetic field is predicted to restore and split again the Dirac points in the momentum space, inducing a distinct 2D topological semimetal phase with two single-fold Dirac cones of opposite spin-momentum windings.

关键词： electrical conductivity Electronic structure Magnetoresistance Magnetotransport Metal-insulator transition Surface states Topological insulators Topological phases of matter

来源：评论

学校读者我要写书评

暂无评论

Linear and Nonlinear Reconstruction Algorithms for Atomic-Resolution Tomography Using Phase Contrast Electron Microscopy

引用

Microscopy and Microanalysis 2018年第S1期24卷 110-111页

作者： Colin Ophus David Ren Michael Chen Catherine Groschner Mary Scott Laura Waller Molecular Foundry Lawrence Berkeley National Laboratory Berkeley USA Department of Electrical Engineering and Computer Science UC Berkeley Berkeley CA Materials Science and Engineering UC Berkeley Berkeley CA

来源：评论

学校读者我要写书评

暂无评论

Title: Observation of Bloch-Siegert Shift in an Atomically Thin Crystal

Title: Observation of Bloch-Siegert Shift in an Atomically T...

引用

2018 IEEE Photonics Society Summer Topicals Meeting Series, SUM 2018

作者： Sie, Edbert J. Lui, C.H. Lee, Yi-Hsien Fu, Liang Kong, Jing Gedik, Nuh Department of Physics Massachusetts Institute of Technology CambridgeMA02139 United States Department of Physics and Astronomy University of California RiversideCA92521 United States Materials Science and Engineering National Tsing-Hua University Hsinchu30013 Taiwan Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology CambridgeMA02139 United States Geballe Laboratory for Advanced Materials Stanford University StanfordCA94305 United States

ISBN: (纸本)9781538653432

Coherent light-matter interaction can be used to manipulate the energy levels of atoms, molecules and solids. When light with frequency ω is detuned away from a resonance ω0, repulsion between the photon-dressed (Floquet) states can lead to a shift of energy resonance. The dominant effect is the optical Stark shift (∝ 1/( ω0-ω)), but there is an additional contribution from the so-called Bloch-Siegert shift (∝ 1/( ω0 + ω)). Although it is common in atoms and molecules, the observation of Bloch-Siegert shift in solids has so far been limited only to artificial atoms since the shifts were small (2 under infrared optical driving by virtue of the strong light-matter interaction in this system. Moreover, we can disentangle the Bloch-Siegert shift entirely from the optical Stark shift, because the two effects are found to obey opposite selection rules at different valleys. By controlling the light helicity, we can confine the Bloch-Siegert shift to occur only at one valley, and the optical Stark shift at the other valley. Such a valley-exclusive Bloch-Siegert shift allows for enhanced control over the valleytronic properties in two-dimensional materials, and offers a new avenue to explore quantum optics in solids. © 2018 IEEE.

关键词： Molecules

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

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

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：