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International Conference on Computer Supported Cooperative Work in Design

作者： Leonardo A. de C. Gatti Flávia Maria Santoro Vanessa T. Nunes NP2TEC - Research and Practice Group in Information Technology UNIRIO Rio de Janeiro Brazil NP2TEC-Research and Practice Group in Information Technology Department of Applied Informatics UNIRIO Federal University of Rio de Janeiro Rio de Janeiro Brazil COPPE - Systems Engineering and Computer Science Program UFRJ Rio de Janeiro Brazil

The main knowledge management challenges are to capture, store and reuse contextual knowledge generated during interactions that occur daily in an organization. In this paper, we propose an activity context-aware architecture to support knowledge management in working processes. The required features for this architecture are processing, reasoning and sharing contextual knowledge involving information about activities performed. We also present results from evaluation of our proposal — A-CoBrA — for a specific domain.

关键词： Knowledge management Computer architecture Context modeling Collaborative work Proposals information technology Informatics Service oriented architecture Ontologies Knowledge engineering

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Toward full public E-service environment in developing countries

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World Academy of Science, engineering and Technology 2010年 66卷 618-622页

作者： Hassan, H.S. Shehab, E. Peppard, J. PhD student in Decision Engineering Centre School of Applied Sciences Cranfield University Cranfield Bedford MK43 0AL United Kingdom Senior Lecturer and Course Director in Decision Engineering Centre School of Applied Sciences Cranfield University Cranfield Bedford MK43 0AL United Kingdom Professor of Information Systems and Director of the IT Leadership Program School of Management Cranfield University Cranfield Bedford MK43 0AL United Kingdom

Changing technology and increased constituent demand for government services derive the need for governmental responsiveness. The government organisations in the developing countries will be under increased pressure to change their bureaucratic systems to be able to respond rapidly to changing and increasing requirements and rapid technology advancements. This paper aims to present a conceptual framework for explaining the main barriers and drivers of public E-service development. Therefore, the framework provides a basic context within which the process and practice of E-Service can be implemented successfully in the public sector organisations. The framework is flexible enough to be adopted by governments at different levels;national or local by developing countries around the world.

关键词： Developing countries

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Optimal dividend distribution policy from the perspective of the impatient and loss-averse investor

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Journal of Socio-Economics 2009年第3期38卷 534-540页

作者： Yang, Yang Shoji, Isao Kanehiro, Sumei Doctoral Program in Systems and Information Engineering University of Tsukuba Tsukuba Ibaraki 305-8573 Japan Graduate School of Systems and Information Engineering University of Tsukuba Tsukuba Ibaraki 305-8573 1-1-1 Tennoudai Japan Keihatsusha Inc. Tokyo 135-0042 Kiba Koutou Japan

This paper discusses a problem concerning intertemporal decision-making under uncertainty when its subject has psychological biases. Here, we consider an investment company as a decision maker that invests money from investors in a financial asset and pays some dividend every period depending on the performance of the investment. On the other hand, we assume investors have such psychological biases as inconsistent time preference and loss aversion. Through numerical experiments we show that the optimal dividend distribution under inconsistent time preference and loss aversion is quite different from the distribution without these psychological factors, and that combinations of the two factors produce various patterns of dividend distribution. © 2009 Elsevier Inc. All rights reserved.

关键词： Intertemporal choice Loss aversion Quasi-hyperbolic discounting Reference-dependent preference Time inconsistent preference

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Use of a step-response approximation for thermal transient modeling in power MOSFETs

Use of a step-response approximation for thermal transient m...

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74th ARFTG Microwave Measurement Conference - System Modeling and Measurement for High Accuracy Verification

作者： Baylis, Charles Perry, Joseph Moldovan, Matthew Marks II, Robert J. Dunleavy, Lawrence Wireless and Microwave Circuits and Systems Program Department of Electrical and Computer Engineering Baylor University Waco TX 76798 United States Center for Wireless and Microwave Information Systems Department of Electrical Engineering University of South Florida Tampa FL 33620 United States Modelithics Inc. Tampa FL 33612 United States

ISBN: (纸本)9781424457137

In a previous ARFTG paper, we presented the measurement of the thermally-induced transient drain voltage response of a power Si MOSFET to a step excitation in gate voltage. The data was fit by assuming the drain voltage takes an exponential shape. This relies on the assumption that the drain current is a step function, which is actually only approximate due to the dependence of the drain current on temperature. In this work, we show that the exponential approximation actually possesses the same asymptotic behavior of a more accurate, model-based solution we have obtained that incorporates thermal feedback. We show that the more theoretically accurate solution and exponential approximation of the solution both provide excellent fits to measured data for the Si MOSFET. © 2009 IEEE.

关键词： Power MOSFET

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Responsiveness Improvement of Idling Speed Control for Automotive Using SMC

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Journal of Software engineering and Applications 2009年第5期2卷 309-315页

作者： Yang ZHANG Nobuo KURIHARA Hiroyuki YAMAGUCHI Doctor of Science Program in Mechanical Systems Hachinohe Institute of Technology Graduate School of Engineering Hachinohe Institute of Technology Department of System and Information Hachinohe Institute of Technology

To improve the responsiveness of engine speed control to disturbances, robust controls were investigated by simulation. The intake air control system of a gasoline engine is a typical nonlinear system, and the disturbances and parameter perturbations are generally regarded as being the unstable factors with regard to engine control. In this paper, a Mean-Value Engine Model (MVEM) with disturbances and parameter perturbations is investigated using Sliding Mode Control (SMC), which is a form of variable structure control, with a view to address instability in the idle speed control process. The simulation results confirmed that, compared with a conventional PI (Proportional-Integral) controller, the stability of the idle speed for an engine that is being subjected to disturbances, parameter variations and background noise is greatly improved by the application of SMC.

关键词： Gasoline Engine Intake Air Control Sliding Mode Control Simulation

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Duty cycle dependent pulsed IV simulation and thermal time constant model fitting for LDMOS transistors

Duty cycle dependent pulsed IV simulation and thermal time c...

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74th ARFTG Microwave Measurement Conference - System Modeling and Measurement for High Accuracy Verification

作者： Meena, Sivalingam Somasundaram Baylis, Charles Dunleavy, Lawrence Marbell, Marvin Center for Wireless and Microwave Information Systems Department of Electrical Engineering University of South Florida Tampa FL United States Modelithics Inc. Tampa FL United States Wireless and Microwave Circuits and Systems Program Department of Electrical and Computer Engineering Baylor University Waco TX United States Modelithics Inc. United States Infineon Technologies Morgan Hill CA United States

ISBN: (纸本)9781424457137

A pulsed simulation approach is demonstrated for prediction of duty-cycle dependent thermal effects in transistors. Also a novel method is shown for fitting and/or validating electro-thermal models using pulsed IV measurements and pulsed IV simulations. A commercial LDMOS device is used to demonstrate the new methods. After extracting the thermal time constant, good agreement is achieved between measured and simulated pulsed IV results under a wide range of different pulse conditions including DC, very short (

关键词： Equivalent circuits

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Development of a framework for parallel simulators with various physics and its performance

Development of a framework for parallel simulators with vari...

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Parallel Computational Fluid Dynamics, Parallel CFD 2007

作者： Ono, Kenji Tamaki, Tsuyoshi Yoshikawa, Hiroyuki Functionality Simulation and Information Team VCAD System Research Program RIKEN 2-1 Hirosawa Wako 351-0198 Japan Division of Human Mechanical Systems and Design Faculty and Graduate School of Engineering Hokkaido University N13 W8 Kita-ku Sapporo 060-8628 Japan Fujitsu Nagano Systems Engineering 1415 Midori-cho Tsuruga Nagano 380-0813 Japan

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Fuzzy supervised roll axis controller for a hovering system

Fuzzy supervised roll axis controller for a hovering system

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Conference of the North American Fuzzy information Processing Society - NAFIPS

作者： Kourosh Rahnamai Kevin Gorman Olalekan Adeoyin Timothy Allard Department of Electrical Engineering Western New England College Springfield MA USA Engineering Leadership Program General Dynamics Advanced Information Systems Corporation Pittsfield MA USA

Vertical take off and landing aircrafts have been the subject of research for many years. The Boeing CV-22 Osprey is one such aircraft. Takeoff and landing phases of these aircrafts create very challenging control problems. Having two massive engines at the wingtips of the airplane creates an inherently unstable system. Added to this challenge is an inherent delay in pilot demand for engine thrust changes. In this paper we will present an intelligent fuzzy supervisory agent that monitors and modifies the gain scheduled controllers at high roll angles. This fuzzy agent modifies the thrust level and the controller parameters. To model the roll axis behavior of such aerial vehicles two electric motors with propellers are mounted at the end of a beam with an almost frictionless pivoting point at the center. A classical Gain scheduled PID controller is used as the primary controller for this system.

关键词： Fuzzy control Fuzzy systems Control systems Aircraft propulsion Engines Aerospace control Airplanes Delay Intelligent agent Electric vehicles

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Use of a step-response approximation for thermal transient modeling in power MOSFETs

Use of a step-response approximation for thermal transient m...

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ARFTG Conference

作者： Charles Baylis Joseph Perry Matthew Moldovan Robert J. Marks Lawrence Dunleavy Wireless and Microwave Circuits and Systems Program Department of Electrical and Computer Engineering Baylor University Waco Waco TX USA Center of Wireless and Microwave Information Systems Department of Electrical Engineering University of South Florida Tampa FL USA

关键词： MOSFETs Temperature Time measurement Electrothermal effects Thermal resistance Electrical resistance measurement Power measurement Voltage measurement Thermal engineering Power system modeling

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Insider theft of intellectual property for business advantage: A preliminary model

Insider theft of intellectual property for business advantag...

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1st International Workshop on Managing Insider Security Threats, MIST 2009 - In Conjunction with IFIPTM 2009

作者： Moore, Andrew P. Cappelli, Dawn M. Caron, Thomas C. Shaw, Eric Trzeciak, Randall F. H. John Heinz III College School of Information Systems Management Carnegie Mellon University United States CERT Clinical Psychologist at Consulting and Clinical Psychology Ltd. United States CERT3 Program Software Engineering Institute Carnegie Mellon University 4555 Fifth Avenue Pittsburgh PA 15213 United States

A study conducted by the Carnegie Mellon University Software engineering Institute CERT program analyzed hundreds of insider cyber crimes across U.S. critical infrastructure sectors. Follow-up work involved detailed group modeling and analysis of 35 cases of insider theft of intellectual property. In the context of this paper, insider theft of intellectual property for business advantage includes incidents in which the insider's primary goal is stealing confidential or proprietary information from the organization with the intent to use it to take to a new job, to get a new job, or to start a business. It does not include cases of in which insiders sell an organization's information. This paper describes general observations about, and a system dynamics model of, this class of insider crime based on our empirical data. This work generates empirically-based hypotheses for validation and a basis for identifying mititgative measures in future work.

关键词： Crime

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