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International Conference on Intelligent Systems Design and Applications (ISDA)

作者： L.J. Herrera O. E. Pecho R. Ghinea I. Rojas H. Pomares A. Guillén Ana Ionescu J. Cardona R. Pulgar M.M. Perez Computer Architecture and Technology Department C.I.T.I.C. University of Granada Granada Spain Optics Department University of Granada Granada Spain Stomatology Department University of Granada Granada Spain

This work presents a Color Fuzzy Set Design procedure, or similarly a color naming procedure, based on the VITA Classical dental color shade guide, for composite color matching applications in direct restorations in aesthetic dentistry. For that purpose, a psychophysical experience based on a set of visual assessments by a panel of observers was performed, with the objective of identifying the areas of the CIELAB color space which can be associated to each shade of the VITA guide. A number of composite sets from four different manufacturing companies were used in the experiment. This information was processed and a set of nonparametric Fuzzy Sets was obtained for the VITA shades, with the aid of an acceptability dental color threshold taken from previous studies. The designed Fuzzy Set System was applied for the identification of the VITA shade of different dentine and enamel composite samples (bilaminar technique) from two different manufacturing companies, with the subsequent clinical applicability. Results show a high level of accuracy in VITA shade identification of the operated dental samples, when compared with visual assessment performed by experts.

关键词： Color Dentistry Companies Observers

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A Synthesis of Electronically Controllable Current-Mode PI, PD and PID Controllers Employing CCCDBAs

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Circuits and Systems 2013年第3期4卷 287-292页

作者： Somchai Srisakultiew Montree Siripruchyanun Department of Computer Engineering Faculty of Engineering and Architecture Rajamangala University of Technology Isan Nakhonratsima Thailand Department of Teacher Training in Electrical Engineering Faculty of Technical Education King Mongkut’s University of Technology North Bangkok Bangkok Thailand Department of Teacher Training in Electrical Engineering Faculty of Technical Education King Mongkut’s University of Technology North Bangkok Bangkok Thailand

This paper presents a synthesis of current-mode PI, PD and PID controllers employing current controlled current differential buffer amplifiers (CCCDBAs). The features of these controllers are that: the output parameters can be electronically/independently controlled by adjusting corresponding bias currents in the proportional, integral, and deviation controllers;circuit description of the PID controller is simply formulated, it consists of four CCCDBAs cooperating with two grounded capacitors, and PI and PD controllers are composed of three CCCCDBAs and a grounded capacitor. Without any external resistor, the proposed circuits are very suitable to develop into integrated circuit architecture. The given results from the PSpice simulation agree well with the theoretical anticipation. The approximate power consumption in a closed loop control system consisting of the PI, PD and PID controller with low-pass filter passive plant are 4.03 mW, 4.85 mW and 5.71 mW, respectively, at ±1.5 V power supply voltages.

关键词： Current-Mode PID Controller CCCDBA

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Digital Archaeological Landscapes & Replicated Artifacts: Questions of Analytical & Phenomenological Authenticity & Ethical Policies in CyberArchaeology

Digital Archaeological Landscapes & Replicated Artifacts: Qu...

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International Congress on Digital Heritage

作者： Ashley M. Richter Vid Petrovic David Vanoni Steven M. Parish Falko Kuester Thomas E. Levy Department of Anthropology Center of Interdisciplinary Science for Art Architecture UCSD branch of the California Institute of Telecommunications and Information Technology Department of Anthropology University of California San Diego Department of Computer Science & Engineering UCSD branch of the California Institute of Telecommunications and Information Technology Departments of Computer Science & Engineering & Structural Engineering UCSD branch of the California Institute of Telecommunications and Information Technology

As cyberarchaeology pushes the boundaries of digital replication of space, objects, and arguably, time itself, it simultaneously adjusts mankind's perception of these things, their connection to the individual and to culture, and our ability to analyze these increasingly solid intangible data sets. When considered as part of the evolving global modernist perspective, and as something valuable as a comparative analytical tool- these are useful developments. However, with every innovation, comes a price. And in creating virtually solid simulacra of cultural heritage, we must consider the implications of the removed authenticities cyberarchaeologists are creating. How might the ability to have a virtual copy affect international conservation policies for archaeological sites and collected artifacts? What does a virtual and potentially 3D printable version of an artifact mean to the economics of looting? How might digital augmentation in museums be balanced so as not to replace the real artifacts themselves? In developing the interdisciplinary and collaborative big-system cyberarchaeological methodologies and systems like those at the Center of Interdisciplinary Science for Art, architecture, and Archaeology at the University of California, San Diego, the ethical implications of reactions to digitization and digital analysis are being concurrently evaluated so that some flexible contingencies can be built in as a safety measure to protect the authentic from the misuse of its heterotopic virtual counterparts.

关键词： Component Authenticity Digital artifact Replica Replicated artifact Archaeological landscape Point cloud Mesh 3D printing technology Holodeck Virtual reality CISA3 UCSD

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Teaching information and software security courses in regular and distance learning programs

Teaching information and software security courses in regula...

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IEEE Education Engineering (EDUCON)

作者： Anca-Juliana Stoica Shareeful Islam Department of Information Technology Uppsala University Uppsala Sweden Department of Electrical and Computer Engineering University of Florida Gainesville FL USA School of Architecture Computing and Engineering University of East London London UK

Information system security is critical to meet the growing technological needs for the industry. Information security education is necessary to support such need. However security education depends on real project context. In this article, we address the educational challenges in teaching information and software system security by presenting an education framework governed by context-driven action research used for developing modules in specific regular and distance learning programs. We differentiate issues relating to both regular and distance learning program.

关键词： computer aided instruction Context Information security Software systems

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Probabilistic Management of Slope Disaster Detection Systems for Reduced Energy Consumption and its Convergence Property *

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IFAC Proceedings Volumes 2013年第27期46卷 253-260页

作者： Kenji Hirata Keigo Koizumi João P. Hespanha Department of Mechanical Engineering Nagaoka University of Technology Nagaoka 940 2188 Japan Department of Global Architecture Osaka University 2-1 Yamadaoka Suita 565 0871 Japan Department of Electrical and Computer Engineering University of California at Santa Barbara Santa Barbara CA 93106 USA

Distributed networked sensor systems have a potential applicability for developing a slope disaster monitoring system. A low energy consumption property and an eventual long running life are an important issue in this type of outdoor application. This paper proposes a probabilistic strategy to turn on/off each sensor node that could reduce an entire amount of consuming energy over the network. Effectiveness of the proposed probability assignment strategy is evaluated through numerical experiments, and convergence property is also investigated.

关键词： Sensor networks, Slope disaster monitoring, Energy consumption, Distributed decision making

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Markov-Based Stochastic Unit Commitment Considering Wind Power Forecasts

Markov-Based Stochastic Unit Commitment Considering Wind Pow...

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IEEE Power and Energy Society General Meeting

作者： Yaowen Yu Peter B. Luh Eugene Litvinov Tongxin Zheng Feng Zhao Jinye Zhao Department of Electrical and Computer Engineering University of Connecticut Storrs CT 06269-2157 USA Business Architecture and Technology ISO New England Holyoke MA 01040-2841 USA

ISBN: (纸本)9781479913022

To reduce the dependence on fossil fuels and the greenhouse gas emission, the integration of wind energy has attracted worldwide attention. Stochastic unit commitment (SUC) problem with wind generation uncertainty is difficult, since wind generation is intermittent and uncertain. In the stochastic programming approach, a large number of scenarios are required to represent the stochastic wind generation, resulting in large computational effort. A Markovian approach was used to formulate the SUC problem by assuming the state of intermittent generation at a time instant summarized the information of the past in a probabilistic sense, in order to reduce computational complexity. For simplicity, wind generation state probabilities were calculated from state transition matrices, which were established based on historical data. In this paper, to improve the modeling accuracy, wind power forecasts are embedded into the Markov modeling framework, where the wind power forecast with historical forecast error is converted to discrete states with associated probabilities. In addition, corrective control actions such as load shedding and wind curtailment are considered in the Markovian approach to capture high-impact abnormal operating conditions such as sudden wind changes. Numerical testing results demonstrate the cost efficiency of the new method.

关键词： Intermittent wind generation Markov chains unit commitment wind power forecast Wind energy Unit commitment Wind energy generation Markov chain Fossil Fuels Tree graphs Stochastic

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Reliable System Design with a High Degree of Diagnostic Procedures for Embedded Systems

Reliable System Design with a High Degree of Diagnostic Proc...

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IET Irish Signals and Systems Conference

作者： Michael H. Schwarz Josef Boercsoek Department of Safety Computer Technology University of Kassel Department of Computer Architecture and System Programming University of Kassel

ISBN: (纸本)9781629935881

Maintenance starts with reliable diagnostics. Programming Logic Controllers (PLCs) are often equipped with a high degree of diagnostic procedures in order to ensure that the processing unit is functioning correctly. It is vital to verify that the system with its programme is still within a 'healthy' state, otherwise a safety function is called and the system is brought into a safe state, or if possible, defect and malfunctioning components are exchanged during operation and the process can continue without shutting down the system. However, when it comes to smaller devices such as intelligent sensors, embedded controller devices with the functionality of an e.g. PID (Proportional-Integral-Derivative), predictive controller, filter or analytical algorithm, which is embedded into a FPGA or micro-controller then diagnostics and verification methods are often not considered in the way they should be. For example, if an intelligent sensor system is not able to diagnose that the sensor-head is malfunctioning, but the sensor-head still provides some data, then the smart algorithm bases its calculation on wrong data, which can cause a dangerous situation. This paper investigates and shows recent results to combine diagnostic methods for small scale devices. Several safety-related structures are considered with a high degree of diagnostic coverage. The paper presents relevant procedures and structures to increase the reliability of small devices without utilising a full scale microcontroller system.

关键词： Reliability Safety structure Maintenance Diagnosis

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A framework for TV logos learning using linear inverse diffusion filters for noise removal

A framework for TV logos learning using linear inverse diffu...

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International Conference on High Performance Computing & Simulation (HPCS)

作者： Julián R. Cózar Vesna Zeljković José Mª González-Linares Nicolás Guil Claude Tameze Ventzeslav Valev Computer Architecture Department University of Málaga Malaga Spain School of Engineering & Computing Sciences New York Institute of Technology USA Department of Mathematics & Computer Science Lincoln University PA USA Institute of Mathematics and Informatics Bulgarian Academy of Sciences Sofia Bulgaria

Different logotypes represent significant cues for video annotations. A combination of temporal and spatial segmentation methods can be used for logo extraction from various video contents. To achieve this segmentation, pixels with low variation of intensity over time are detected. Static backgrounds can become spurious parts of these logos. This paper offers a new way to use several segmentations of logos to learn new logo models from which noise has been removed. First, we group segmented logos of similar appearances into different clusters. Then, a model is learned for each cluster that has a minimum number of members. This is done by applying a linear inverse diffusion filter to all logos in each cluster. Our experiments demonstrate that this filter removes most of the noise that was added to the logo during segmentation and it successfully copes with misclassified logos that have been wrongly added to a cluster.

关键词： Noise Maximum likelihood detection Nonlinear filters Image segmentation TV Shape Noise measurement

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Design, implementation and validation of a simulation tool for networked virtual environments

Design, implementation and validation of a simulation tool f...

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2012 International Conference on computer, Information and Telecommunication Systems, CITS 2012

作者： Font, Juan Luis Sevillano, Jose Luis Cascado-Caballero, Daniel Lopez-Muñoz, Gema Regassa, Berhanu Department of Computer Technology and Architecture University of Seville Spain

ISBN: (纸本)9781467315500

The popularisation of Networked Virtual Environment (NVE) applications in several context, including social interaction and e-Health fields, makes them an interesting subject of study. The proper estimation of their network requirements are key to ensure a good user experience, an important factor that determines the acceptance and success of the applications. The studies focused on NVE with an important social component are relatively scarce. This paper presents the design, implementation and validation of a simulation tool to assist in the study of the requirements of a NVE application, Open Wonderland. This tool will facilitate the study of several parameters that define the user experience. The study describes the overall structure, development framework and models that define the traffic generation patterns and validates the simulation results by comparing its traces with real traffic from previous studies. © 2012 IEEE.

关键词： Virtual reality

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An experimental evaluation of server performance in networked virtual environments

An experimental evaluation of server performance in networke...

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2012 International Symposium on Performance Evaluation of computer and Telecommunication Systems, SPECTS'12 - Part of SummerSim 2012 Multiconference

作者： Font, Juan Luis Sevillano, José Luis Cascado, Daniel Department of Computer Technology and Architecture University of Seville Spain

ISBN: (纸本)9781618399823

Several works in the literature have recently addressed the study of different Networked Virtual Environments (NVE) due to their increasing popularity and widespread use in fields ranging from entertainment to e-Health. Open Wonderland is one of these NVEs which has been the subject of several studies mainly focused on the client side. This paper aims to cover the server-side performance issues to provide complementary results that can be useful for properly sizing Open Wonderland systems according to the number of expected users. An experimental testbed is used, which provides real data that shows that CPU and outgoing bandwidth are the most critical parameters when the number of clients increase. © 2012 Society for Modeling & Sim.

关键词： Testbeds

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