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Mechanisms of pit formation at strained crystalline Si(111)∕Si3N4(0001) interfaces: Molecular-dynamics simulations

Physical Review B 2006年第7期74卷 075327-075327页

作者： Martina E. Bachlechner Deepak Srivastava Eli T. Owens Jarrod Schiffbauer Jonas T. Anderson Melissa R. Burky Samuel C. Ducatman Adam M. Gripper Eric J. Guffey Fernando Serrano Ramos Physics Department West Virginia University Morgantown West Virginia 26506 USA NASA Ames Research Center MS T229-1 Moffett Field California 94035 USA Chemistry Department Davis & Elkins College Elkins West Virginia 26241 USA University High School Morgantown West Virginia 26505 USA NASA Independent Verification and Validation Facility Science and Engineering Apprenticeship Program Department of Computer Science Metropolitan University San Juan Puerto Rico 00928

Molecular-dynamics simulations of the crystalline silicon-silicon nitride interfaces are performed to investigate the mechanical failure mechanisms at the interfaces under external strain. At 8% applied tensile strain, parallel to the interface, regular crack initiation and propagation in silicon nitride and dislocation emission and propagation in silicon are observed. At larger 16% strain, however, the formation of a pit similar to that in experiments with lattice-mismatched systems is observed. The simulation results suggest the primary mechanism of pit formation is interaction of a local compressional pinch of the film at the interface with the close proximity to the arrival of a dislocation at the interface in the highly strained silicon.

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Global academy'-remote network applications connecting Japan and Chile over GEMnet2 and R&E networks

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NTT Technical Review 2006年第5期4卷 28-38页

作者： Uose, Hisao Oinuma, Morihide Noguchi, Kazuto Sakai, Yoshihisa Tatematsu, Ken'ichi Vera, Eduardo S. Baloian, Nelson Pulgar, Hernán Ramos, Manuel Mujica, Luis Felipe NTT Advanced Technology Corporation Musashino-shi 180-858 Japan NTT Service Integration Laboratories NTT Photonics Laboratories of Japan IEEE IEICE ALMA-J Project Office National Astronomical Observatory of Japan Nagova University Nobeyama Radio Observatory University of Texas Austin Electrical Engineering and Computer Science Departments University of Chile AccessNova Program University of Tokyo Computer Science Department University of Chile Waseda University Japan Astronomy Department University of Chile ALMA Project Office Santiago Mining Section Andina Division CODELCO Andina Division Photonics Network Project IM2 Chile IM2

This article describes two demonstrations at the NTT Group Communication EXPO held at the Tokyo International Forum in December 2005. These showed visitors two of our trials on the feasibility of remotely operating instruments in Chile from Japan: an optical telescope and rock hammers in an underground copper mine. These applications use a relatively high bandwidth of around 100 Mbit/s and require short delay times for smooth interactive operation. To satisfy these requirements we used NTT's experimental research network GEMnet2 in collaboration with partner R&E (research and education) networks in North and South America. The demonstrations showed that Internet-based networks can handle interactive network applications with sufficient quality between two sites separated by almost the maximum possible distance on the Earth as long as the bandwidth and the route are carefully managed.

关键词： Remote control

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Real-time organ motion tracking and fast image registration system for MRI-guided surgery

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Systems and computers in Japan 2006年第1期37卷 83-92页

作者： Tokuda, Junichi Hirano, Masaya Tsukamoto, Tetsuji Dohi, Takeyoshi Hata, Nobuhiko Graduate School of Information Science and Technology University of Tokyo Tokyo 113-8656 Japan GE Yokogawa Medical Systems Ltd. Hino 191-8503 Japan International Society for Computer-Aided Surgery Japan Society for Computer-Aided Surgery Japan Society for Magnetic Resonance in Medicine GE Yokogawa Medical Systems Ltd. Imaging Application Tech. Center MR Group R and D Laboratory Technology Center GE Yokogawa Medical Systems Ltd. Society for Magnetic Resonance in Medicine Graduate School of Information Science and Technology Society for Life Support Technology Japan Society for Organ Preservation Biology and Medicine Society for Precision Engineering Society for Medical Image Computing and Computer Assisted Intervention International Union for Physics and Engineering Sciences in Medicine JSMEBE Japan Society for Life Assistance Technology Brigham and Women's Hospital Harvard Medical School MR Therapy Program

The advantage of magnetic resonance imaging (MRI)-guided surgery, in which MR images taken during surgery are used to guide the surgery, has been recognized recently. However, there is a problem, due to long imaging time of MRI, that it is difficult to capture the respiratory organ motion. It is often a constraint that the patient must hold his or her breath, especially in the treatment of the abdominal region. Consequently, this paper proposes a method of eliminating this constraint in MRI-guided surgery by real-time monitoring of the movement of the organ involved in the surgery by means of the signal derived from MRI. Specifically, the navigator echo is extracted in imaging during surgery. The movement of the organ involved in surgery is detected on the basis of the change in the calculated projection profile, and the results are presented to the surgeon. In this study, the procedure is built into a 1.5-T clinical MRI system. The feasibility of the proposed system was examined under clinical conditions by evaluating its accuracy and delay in a phantom experiment, and also in an in vivo experiment on the liver of a volunteer. The results are reported in this paper. © 2005 Wiley Periodicals, Inc.

关键词： Motion estimation

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Meeting the Information Assurance Crisis in the U.S. Now

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EDPACS 2006年第6期28卷 1-14页

作者： Corey Schou Deborah Frincke Charles Reynolds James Frost The Associate Dean of Information Systems Programs at Idaho State University (ISU) in Pocatello and the director of the Center for Decision Support. Currently he serves as the Chair of the National Colloquium on Information System Security Education. Schou also directs the ISU National Center of Excellence in Information Assurance Education and the ISU Technology Innovation Center. Contact Corey Schou one of the authors of this article and the Chair of the NCISSE by email at Schou@*** for help in finding additional ways to address the issues raised in this article. A member of the University of Idaho College of Engineering faculty. She graduated from the University of California at Davis. Frincke is the co-director and co-founder of the university's Center for Secure and Dependable Software (CSDS). She was the program chair for the 2nd International Workshop on Recent Advances in Intrusion Detection (RAID). A professor of Computer Science at the College of Integrated Science and Technology at James Madison University in Harrisonburg Virginia. He holds a Ph.D. in computer science from the University of Texas at Austin and a BA in philosophy from the University of Houston. Reynolds is the Director of Information System Security Education at James Madison University. Since 1997 Reynolds has led the development of the first remote Internet-based curriculum that leads to an M.S. degree in computer science with a concentration in information security. Thus far 160 students have completed this program. A professor of computer information systems at Idaho State University and the manager of its Simplot Decision Support Center.

T he only difference etween evolution and revolution is the speed at which each occurs.

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The development of a summer study abroad program for engineering and computer science students at Baylor University

The development of a summer study abroad program for enginee...

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34th Annual Frontiers in Education: Expanding Educational Opportunities Through Partnerships and Distance Learning - Conference Proceedings, FIE

作者： Fry, Cynthia C. Maastricht Summer Study Abroad Program School of Engineering and Computer Science Baylor University One Bear Place #97356 Waco TX 76798

The Baylor In Maastricht (BIM) Summer Study Abroad program is a 41-day study abroad program in the Netherlands. Baylor In Maastricht is a summer program that is sponsored by the School of engineering and science of Baylor University in Waco, Texas, in conjunction with the Universiteit Maastricht, in the Netherlands. The program gives engineering and computer science students an opportunity to take two Baylor courses (six hours), while also providing an abroad experience in the heart of Europe. It also answers the charge given four years ago by the Dean of the School of engineering and computer science to get our students out of the building! This paper will discuss the goals and objectives of such a program, and will chronicle the design, development, and execution of the resulting study abroad program. We will explore, in depth, the number and type of participants, the details of trip planning and organization, the decision on which courses to offer, planned weekend group trips, the facilities and support of the Universiteit Maastricht, and accommodations. This paper will also discuss the execution of the first two study abroad programs to Maastricht, the Netherlands - what worked, what didn't work, what was good, where we have improved. A summary of the student evaluations from the program is included. © 2004 IEEE.

关键词： engineering education

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Chitosan for Biofunctionalization of Microsystems

Chitosan for Biofunctionalization of Microsystems

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IEEE/NLM Life science Systems and Applications Workshop

作者： Stephan T. Koev Michael A. Powers Vlad Badilita Hyunmin Yi William E. Bentley Gregory F. Payne Gary W. Rubloff Reza Ghodssi Institute for Systems Research ISR University of Maryland College Park MD USA University System of Maryland Adelphi MD US Department of Materials Science and Engineering University of Maryland College Park MD USA Department of Chemical Engineering University of Maryland College Park MD 20742 University of Maryland Biotechnology Institute (UMBI) University of Maryland College Park MD 20742 Bioengineering Graduate Program University of Maryland College Park MD 20742 University of Maryland College Park MD USA University of Maryland Biotechnology Institute College Park MD USA Institute for Systems Research (ISR) University of Maryland College Park MD 20742 Department of Materials Science and Engineering University of Maryland College Park MD 20742 Department of Electrical and Computer Engineering University of Maryland College Park MD 20742 Institute for Systems Research (ISR) University of Maryland College Park MD 20742

ISBN: (纸本)1424402778

We present the use of the polysaccharide chitosan for immobilizing biomolecules on microfabricated device surfaces. The main advantages of chitosan are its abundance of primary amine groups and its ability to be electrodeposited. Biomolecules are easily attached to chitosan 's amines by standard glutaraldehyde chemistry. The electrodeposition of chitosan allows accurate spatial and temporal control of biomolecule placement. We have demonstrated this biofunctionalization method for two different bioMEMS devices: a biophotonic sensor and a micromechanical biosensor. We have successfully assembled probe DNA on each of them and detected hybridization with target DNA as a demonstration of sensor operation. Here, we briefly present the fabrication procedure and testing results for both of these bioMEMS sensing devices

关键词： DNA Biosensors Molecular biophysics Probes Micromechanical devices Optical sensors Optical surface waves Optical interferometry Assembly Biomedical optical imaging

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Unsupervised knowledge navigation: Reconstructing the hypermedia structure of instructional materials on world wide web

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WSEAS Transactions on Information science and Applications 2005年第10期2卷 1505-1513页

作者： Hsu, Chang-Kai Chang, Jyh-Cheng Chang, Maiga Heh, Jia-Sheng Dept. of Information and Computer Engineering Chung Yuan Christian University Chung Li Taiwan Program Office of National Science and Technology Program for e-Learning Taipei Taiwan

There are many different terms when learner surf on web. When learner is reading an instructional material, he/she may not understand the meaning of specific term/keyword in a moment easily. At this time, the learner will need to find out the definitions or references about the keyword. However, unfortunately, the learner will not be able to find out what he/ she is looking for in the most of time. It is because of the instruction designers of the learning materials who had never thought that would be a problem for learners. Therefore, it will be excellent, if the associated documents with the keyword which is the learner looking for could be retrieved automatically, and furthermore, the original document structure could be reconstructed to a more suitable for learning and reading in real-time. In this paper, the graph theorem and the data mining technique are applying to produce an association lattice of keywords and design a searching algorithm of reconstructing the necessary instructional materials on the website automatically.

关键词： World Wide Web

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Incomplete inverse preconditioners

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ARI Bulletin of the Istanbul Technical University 2005年第3期54卷 48-64页

作者： Alvarado, Fernando Dag, Hasan Department of Electrical and Computer Engineering University of Wisconsin Madison 53706 United States Computational Science and Engineering Program Informatics Institute Istanbul Technical University 34469 Maslak Istanbul Turkey

Incomplete LU factorization is a valuable preconditioning approach for sparse iterative solvers. An "ideal" but inefficient preconditioner for the iterative solution of Ax = b is A-1 itself. This paper describes a preconditioner based on sparse approximations to partitioned representations of A-1, in addition to the results of implementation of the proposed method in a shared memory parallel environment. The partitioned inverses are normally somewhat sparse. Their sparsity can be enhanced with suitable ordering and partitioning algorithms. Sparse approximations to these partitioned inverse representations can be obtained either by discarding selected nonzero entries of these inverses or by precluding the creation of some inversion fills. Experimental results indicate that the use of these partitioned incomplete inverses as preconditioners results in excellent highly parallel preconditioners.

关键词： Conjugate gradient Iterative methods Parallel computation Partitioned inverse method Preconditioner

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Network management in new realms: Wireless sensor networks

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International Journal of Network Management 2005年第4期15卷 219-221页

作者： Boulis, Athanassios Jha, Sanjay School of Computer Science and Engineering University of New South Wales Sydney NSW 2052 Australia National ICT Australia Networks and Pervasive Computing Program Sydney NSW Australia School of Computer Science and Engineering University of New South Wales Sydney NSW Australia

No abstract available

关键词： DADANET Computational modeling Electronics Analogy Very large scale integration Wireless sensor networks WSN gene Network management

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BME Senior design and freshmen engineering

BME Senior design and freshmen engineering

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2005 ASEE Annual Conference and Exposition: The Changing Landscape of engineering and Technology Education in a Global World

作者： Rowley, Blair A. College of Engineering and Computer Science Wright State University Dayton OH 45435 United States Biomedical Industrial and Human Factors Engineering United States Freshman Engineering and Computer Science Program United States

This paper reports the results for a senior-freshman teaming event that took place during the fall quarter 2004. It describes the rational for the event, the design leadership required of the seniors, the structure of the design environment, project reports, student reactions, and the event evaluations. This is the second year that our biomedical engineering seniors have been coupled with our engineering and computer science freshmen on a joint design project. The first year results were promising enough to continue doing it the second year. The second year had improved expectations for the seniors coupled with more time to interact with the freshmen. Seniors gained valuable experience leading a design team while the freshmen gained experience teaming and interacting with upperclassmen. This event was possible as the director of the freshman engineering and computer science program was also the professor for the initial course in BME senior design. Over all this has been a win-win effort.

关键词： Structural design

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