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Optimal evolutionary computational parameters for habitat structures optimization

Optimal evolutionary computational parameters for habitat st...

Earth and Space 2006 - 10th Biennial International Conference on engineering, Construction, and Operations in Challenging Environments

作者： Hull, Patrick V. Sansoucie, Michael Dozier, Gerry Tinker, Mike NASA Marshall Space Flight Center Spacecraft and Vehicle Systems Dept./EV11 Huntsville AL 35812 United States Applied Computational Intelligence Lab. Department of Computer Science Amd Software Engineering Auburn University Auburn AL 36849-5347

ISBN: (纸本)0784408300

Long-duration surface missions to the Moon and Mars will require bases to accommodate habitats for the astronauts, as well as indoor laboratory facilities, in-situ resource plants, power plants, and scientific/surface mobility equipment. Transporting the materials and equipment required to build the necessary habitats would be costly and difficult. However, the use of planetary resources to produce construction materials, or even as naturally found (such as lunar regolith utilized as an outer layer for radiation shielding, or regolith in bags as wall structure), could drastically reduce the upmass for habitats. The materials chosen for the habitat walls play a direct role in protection against each of the mentioned hazards. Choosing the best materials, their configuration, and the amount required is extremely difficult due to the immense size of the design region. For example a 3-layer habitat wall created from 20 possible materials all with varying thicknesses would have #number of layers(possible material types)∧(possible thicknesses) = 320∧inf possible solutions. Clearly, an optimization method is warranted for habitat wall design. Standard optimization techniques are not suitable for problems with such large search spaces. To overcome the large search regions, a habitat wall design tool using genetic algorithms has been developed. GAs use a "survival of the fittest" philosophy, where the most fit individuals are more likely to survive and reproduce, therefore transmitting their genes to the next generation. This paper focuses on finding optimal GA parameters for the habitat optimization tool. This tool is a multiobjective formulation of structural analysis, heat loss, radiation, and meteoroid protection. Some of the constraint calculations (i.e. safety factor, deflection, and heat loss) require long computation times. Even though each material has a designated thickness range, the number of different values within that range is near infinite;therefore, the searc

关键词： Lunar missions

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Chaos Information Criteria to Detect High-pressure Gas Leak in Petroleum Refining Plant

Chaos Information Criteria to Detect High-pressure Gas Leak ...

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SICE Annual Conference

作者： Tetsuji Tani Toru Nagasako yasunari Fujimoto Tadashi Iokibe Toru Yamaguchi Process System Technology Center Technology & Engineering Department Idemitsu Kosan Company Limited Chiba Japan Department of Systems Engineering Science Tokyo Metropolitan Institute of Technology Tokyo Japan Research Institute of Application Technologies for Chaos and Complex Systems Company Limited Kanagawa Japan

In a petroleum refining plant, the high-pressure gas leaks resulting from equipment failures may lead to disasters. To minimize these disasters, technology for the early detection of leak sound is indispensable. We have employed chaos theory to identify these dominant sounds, and have already reported these results in papers listed in reference. However, the leak sound is not always more regular than the background noise depending on equipments or weather conditions. In order to detect the high-pressure gas leak sound, it is necessary to estimate the steady state range quantitatively using chaos theory from the background noise. Based on the concept, we describe chaos information criteria for the leak sound detection algorithm. Applying the chaos information criteria to characterize the measured sound data, we conducted the leak sound detection experiment by leaking steam artificially using a silencer nozzle near the high-pressure gas unit in Idemitsu Kosan Chiba Refinery

关键词： Chaos Leak detection Petroleum Refining Background noise Acoustic measurements Acoustic signal detection Equipment failure Delay effects Gas detectors

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BlueGene/L Failure Analysis and Prediction Models

BlueGene/L Failure Analysis and Prediction Models

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International Conference on Dependable systems and Networks (DSN)

作者： Yinglung Liang Yanyong Zhang A. Sivasubramaniam M. Jette R. Sahoo Electrical & Computer Engineering Department Rutgers University USA Computational Resource Management Group Lawrence Livemore National Laboratory USA Computer Science & Engineering Department Pennslyvania State University USA Exploratory Systems Software Department IBM Thomas J. Watson Research Center USA

The growing computational and storage needs of several scientific applications mandate the deployment of extreme-scale parallel machines, such as IBM's BlueGene/L which can accommodate as many as 128 K processors. One of the challenges when designing and deploying these systems in a production setting is the need to take failure occurrences, whether it be in the hardware or in the software, into account. Earlier work has shown that conventional runtime fault-tolerant techniques such as periodic checkpointing are not effective to the emerging systems. Instead, the ability to predict failure occurrences can help develop more effective checkpointing strategies. Failure prediction has long been regarded as a challenging research problem, mainly due to the lack of realistic failure data from actual production systems. In this study, we have collected RAS event logs from BlueGene/L over a period of more than 100 days. We have investigated the characteristics of fatal failure events, as well as the correlation between fatal events and non-fatal events. Based on the observations, we have developed three simple yet effective failure prediction methods, which can predict around 80% of the memory and network failures, and 47% of the application I/O failures

关键词： Failure analysis Predictive models Production systems Checkpointing Concurrent computing Parallel machines Hardware Runtime Fault tolerant systems Prediction methods

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Efficiency of rejection-free dynamic Monte Carlo methods for homogeneous spin models, hard disk systems, and hard sphere systems

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Physical Review E 2006年第2期74卷 026707-026707页

作者： Hiroshi Watanabe Satoshi Yukawa M. A. Novotny Nobuyasu Ito Department of Complex Systems Science Graduate School of Information Science Nagoya University Furouchou Chikusa-ku Nagoya 464-8601 Japan Department of Applied Physics School of Engineering The University of Tokyo Hongo Bunkyo-ku Tokyo 113-8656 Japan Department of Physics and Astronomy and HPC2 Center for Computational Sciences Mississippi State University Mississippi State Mississippi 39762-5167 USA

We construct asymptotic arguments for the relative efficiency of rejection-free Monte Carlo (MC) methods compared to the standard MC method. We find that the efficiency is proportional to exp(constβ) in the Ising, β in the classical XY, and β in the classical Heisenberg spin systems with inverse temperature β, regardless of the dimension. The efficiency in hard particle systems is also obtained, and found to be proportional to (ρcp−ρ)−d with the closest packing density ρcp, density ρ, and dimension d of the systems. We construct and implement a rejection-free Monte Carlo method for the hard-disk system. The RFMC has a greater computational efficiency at high densities, and the density dependence of the efficiency is as predicted by our arguments.

关键词： ISING-MODEL NONEQUILIBRIUM RELAXATION SIMULATIONS TRANSITION ENERGY

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Cell-free synthesis of zinc-binding proteins

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Journal of Structural and Functional Genomics 2006年第2期7卷 93-100页

作者： Matsuda, Takayoshi Kigawa, Takanori Koshiba, Seizo Inoue, Makoto Aoki, Masaaki Yamasaki, Kazuhiko Seki, Motoaki Shinozaki, Kazuo Yokoyama, Shigeyuki Protein Research Group RIKEN Genomic Sciences Center Tsurumi Yokohama 230-0045 1-7-22 Suehiro-cho Japan Department of Computational Intelligence and Systems Science Interdisciplinary Graduate School of Science and Engineering Tokyo Institute of Technology Midori-ku Yokohama 226-8502 4259 Nagatsuta-cho Japan Age Dimension Research Center National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba 305-8566 1-1-1 Higashi Japan Laboratory of Plant Molecular Biology RIKEN Tsukuba Institute Tsukuba 305-0074 3-1-1 Koyadai Japan Plant Functional Genomics Research Group RIKEN Genomic Sciences Center Tsurumi Yokohama 230-0045 1-7-22 Suehiro-cho Japan Department of Biophysics and Biochemistry Graduate School of Science University of Tokyo Bunkyo-ku Tokyo 113-0033 7-3-1 Hongo Japan

Cell-free protein synthesis has become one of the standard methods for protein expression. The cell-free method is suitable for the synthesis of a protein that requires a ligand for its enzymatic activity and/or structure formation and stabilization, since it is an open system, which allows us to add the proper ligand to the reaction mixture. A large number of proteins that require zinc for their function are involved in diverse cellular processes, including transcription, DNA replication, metabolism, and cell signaling. In this study, we analyzed the effects of zinc on the cell-free synthesis of plant-specific zinc-binding transcription factors. The solubility and/or stability of the proteins were significantly increased in the presence of the proper concentration of zinc during the cell-free reaction. NMR analyses confirmed that correctly folded proteins were synthesized by the cell-free method. These results indicate that the cell-free method can be used to synthesize correctly folded and functional zinc-binding proteins. © 2006 Springer science+Business Media B.V.

关键词： Arabido psis thaliana Cell-free protein synthesis In vitro translation Structural genomics Zinc-binding protein

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Nonequilibrium properties of the one-dimensional hard-point gas system

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Physical Review E 2006年第3期74卷 037201-037201页

作者： Giulio Casati Tomaž Prosen Lei Wang Baowen Li Center for Nonlinear and Complex Systems Universita’ degli studi dell’Insubria Via Valleggio 11 22100 Como Italy and CNR-INFM Istituto Nazionale di Fisica Nucleare Sezione di Milano Milano Italy Department of Physics and Center for Computational Science and Engineering Faculty of Science National University of Singapore Singapore 117542-46 Singapore Physics Department Faculty of Mathematics and Physics University of Ljubljana Ljubljana Slovenia Laboratory of Modern Acoustics and Institute of Acoustics Nanjing University 210093 China

We discuss the stability properties of a one-dimensional hard-point gas. We study the decay of the Loschmidt echo which describes the stability of the motion under system perturbations. We show a universal behavior in the echo decay which is intimately connected to the linear dynamical instability of the motion. In particular, in spite of such a weak instability, the asymptotic decay follows a simple exponential law.

关键词： QUANTUM MOTION STABILITY

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Abstracts from the 6th International Conference on the engineering of Sport, 10-14 July 2006, Olympic Hall, Munich, Germany Abstracts

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SPORTS engineering 2006年第4期9卷 229-249页

作者： [Anonymous] TNO Netherlands Delcam plc UK Technological Institute of Toys AIJU Spain Technische Universitaet Muenchen Germany Hochschule für Gestaltung und Kunst Zuerich Germany Otto-v.-Guericke-University Magdeburg Germany AISTS-International Academy of Sports Science and Technology Lausanne Switzerland CSEM-Swiss Center for Electronics and Microtechnology Neuchâtel Swizerland University of Illinois at Urbana-Champaign USA Delft University of Technology Netherlands Faculty of Education Art and Science Yamagata University Japan Department of Mathematical Modelling Perm State Technical University Russia Department of Theoretical Mechanics Perm State Technical University Russia Department of Computational Fluid Dynamics JSC Aviadvigatel Perm Motors Russia Mechanical and Automotive Engineering RMIT University Japan Fluent Europe Ltd Sheffield UK SportKreativWerkstatt GmbH München Germany Sports Technology Research Group Loughborough University UK Department of Mechanical Engineering University of Bath UK Instituto de Biomecánica de Valencia (IBV) Spain University Augsburg UK Sports Engineering Research Group University of Sheffield England Sports-Equipment Technology Technikum Wien Austria Fischer GmbH Germany Biocompatible Materials and Process Engineering TU Munich Germany The University of Waikato New Zealand Sandvik Materials Technology Sweden Institute for Machine Tools and Industrial Management TU Munich Germany Institut fuer Verbundwerkstoffe GmbH Canada Sports Engineering Centre for Sports and Exercise Science Sheffield Hallam University England University of Glamorgan UK Department of Information Science and Engineering Tokyo Institute of Technology Tokyo Japan Toyota Motor Co. Aichi Japan Iowa Univeristy Iowa USA Simbex Lebanon USA Japan Institute of Sports Sciences Tokyo Japan University of Vienna Austria Technische Universität München Germany Department of Econometrics University of Groningen The Netherlands Department of Physical Education and Sport

A radical change (Feenstra, Holmer, Tromans, Moos and Mieritz 2003) in manufacturing is starting to occur. The Rapid Manufacturing, which can be defined as "the use of an additive manufacturing process to construct parts that are used directly as finished products or components", is set to supersede many current uses of moulds and dies. Rapid Manufacturing (Wohlers 2003) is based on new additive manufacturing techniques that produce fully functional parts directly from a 3D CAD model without the use of tooling. The ambitious scope of the European Initiative CUSTOM-FIT, a Framework 6 Integrated Project, is to create a fully integrated system for the design, production and supply of individualized custom-products. Within the cases under study there are strong connections to sporting articles. This project is being funded by the European Commission over the next four years and a half and will become central to European research concerning Rapid Manufacturing (RM).

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The crystal structure of mouse Nup35 reveals atypical RNP motifs and novel homodimerization of the RRM domain

The crystal structure of mouse Nup35 reveals atypical RNP mo...

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The 4th ISGO International Conference on Structural Genomics

作者： Noriko Handa Mutsuko Kukimoto-Niino Ryogo Akasaka Seiichiro Kishishita Kazutaka Murayama Takaho Terada Makoto Inoue Takanori Kigawa Shingo Kose Naoko Imamoto Akiko Tanaka Yoshihide Hayashizaki Mikako Shirouzu Shigeyuki Yokoyama RIKEN Genomic Sciences Center Tsurumi Yokohama 230-0045Japan RIKEN Genomic Sciences Center Tsurumi Yokohama 230-0045Japan RIKEN Genomic Sciences Center Tsurumi Yokohama 230-0045Japan RIKEN Genomic Sciences Center Tsurumi Yokohama 230-0045Japan RIKEN Genomic Sciences Center Tsurumi Yokohama 230-0045Japan Tohoku University Biomedical Engineering Research Organization2-1 Seiryo-machiAobaSendai 980-8575Japan RIKEN Genomic Sciences Center Tsurumi Yokohama 230-0045Japan RIKEN Genomic Sciences Center Tsurumi Yokohama 230-0045Japan RIKEN Genomic Sciences Center Tsurumi Yokohama 230-0045Japan Department of Computational Intelligence and Systems ScienceInterdisciplinary Graduate School of Science and EngineeringTokyo Institute of Technology4259 Nagatsuta-choMidori-kuYokohama226-8502Japan Cellular Dynamics Laboratory RIKEN Discovery Research Institute Wako-shiSaitama351-0198Japan Cellular Dynamics Laboratory RIKEN Discovery Research Institute Wako-shiSaitama351-0198Japan RIKEN Genomic Sciences Center Tsurumi Yokohama 230-0045Japan RIKEN Genomic Sciences Center Tsurumi Yokohama 230-0045Japan RIKEN Genomic Sciences Center Tsurumi Yokohama 230-0045Japan RIKEN Genomic Sciences Center Tsurumi Yokohama 230-0045Japan Department of Biophysics and BiochemistryGraduate School of ScienceThe University of TokyoBunkyo-kuTokyo 113-0033 Japan

＜正＞The nuclear pore complex （NPC） mediates the transport of macromolecules across the nuclear envelope （NE）. The vertebrate nuclear pore protein Nup35, the ortholog of Saccharomyces cerevisiae Nup53p, is suggested to interact with the NE membrane and to be required for nuclear morphology. The highly conserved region

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Topic activation analysis for document streams based on document arrival rate and relevance 05

Topic activation analysis for document streams based on docu...

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20th Annual ACM Symposium on Applied Computing

作者： Cui, Chunhua Kitagawa, Hiroyuki Master's Program in Science and Engineering University of Tsukuba Graduate School of Systems and Information Engineering Center for Computational Sciences University of Tsukuba

ISBN: (纸本)9781581139648

With the advance of network technology in recent years, the dissemination and exchange of massive documents has become commonplace. Accordingly, the importance of content analysis techniques is increasing. Topic analysis in large-scale document streams such as E-mails and news articles is an important research issue. This paper addresses techniques for "topic activation analysis" for document streams. For example, when news articles with a strong relationship to a given topic arrive frequently in a news stream, we can regard the activation level of the topic as high. In [I], Kleinberg proposed a method for analyzing document streams. Although the main objective of his method was to detect bursts of topics, it can also be used for topic activation analysis. His method, however, has a serious limitation in that it only looks at the arrival rate of documents and ignores the degree of relevance for each document. Another limitation is that his method is "batch-oriented." This paper first proposes a novel topic activation analysis scheme that incorporates both document arrival rate and relevance to address the first problem. It then presents an incremental scheme more appropriate for a document streaming environment. The proposed schemes are validated by experiments using real CNN news articles. Copyright 2005 ACM.

关键词： Computer networks

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Modeling and simulation of multiphysics systems

Modeling and simulation of multiphysics systems

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作者： Michopoulos, John G. Farhat, Charbel Fish, Jacob ASME Computational Multiphysics Systems Laboratory Center for Computational Material Science Special Projects Group Washington DC 20375 Dept. of Mechanical Engineering Institute for Computational and Mathematical Engineering Stanford University Stanford CA 94305 Department of Civil Mechanical and Aerospace Engineering Rensselaer Polytechnic Institute Troy NY 12180

A survey on the evolution of modeling and simulation (M&S) technologies related to multiphysics systems is presented. The concept of a context space for M&S is defined in terms of coexisting fields, domains of interaction, length scales, and computational technologies. Past and present efforts comprising this context space are described as well as their relationship to product development [i.e., efforts of ASME's Computer and Information in engineering (CIE) division]. A retrospective of general procedures for developing multifield and multidomain formulations is elucidated for the case fluid-structure interaction pertaining to linear and nonlinear aeroelasticity and aerothermoelasticity as they mostly relate to aerospace applications. Multiscale methodologies and computational technologies associated with M&S generation follow. The evolution of computational and information technologies are also described as they relate to multiphysics M&S. Future potential trends associated with all of these areas conclude this work. Copyright © 2005 by ASME.

关键词： Linear systems

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