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IEEE International Conference on Semiconductor Electronics (ICSE)

作者： S.A. Aljunid Feras N. Hasson M.D.A. Samad M.K. Abdullah M. Othman S. Shaari School of Computer and Communication Engineering Northern Malaysia University College of Engineering Jejawi Perlis Malaysia Photonics Technology Laboratory (PTL) Institute of Micro Engineering and Nanoelectronics (IMEN) Universiti Kebangsaan Malaysia Bangi Selangor Darul Ehsan Malaysia Photonic Laboratory Department of Computer System and Communication Faculty of Engineering University Purda Malaysia Serdang Selangor Darul Ehsan Malaysia

A new detection scheme, namely AND subtraction technique is proposed and presented in this paper. The theory is being elaborated and experimental results have been done by comparing double-weight (DW) code against the existing code, Hadamard. In this paper we have proved that AND subtraction technique gives better bit error rates (BER) performance than Complementary subtraction technique against the received power level.

关键词： Subtraction techniques Multiple access interference Optical receivers Phase detection Error correction Error correction codes Laboratories Bit error rate Optical transmitters Multiaccess communication

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Chemical Sensing and Control in Cell & Tissue Bioreactors

Chemical Sensing and Control in Cell & Tissue Bioreactors

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： P. Rolfe Harbin Institute of Technology Harbin China Department of Communication Computer & System Sciences University of Geneva Italy Advanced Research Institute for Science and Engineering Waseda University Tokyo Japan

To meet needs in cell and tissue engineering bioreactors are evolving to allow cells and tissues to be cultured under precisely defined physical and chemical conditions. Many cell-tissue types are now being cultured, and considered in this work are chondrocytes, vascular endothelial cells, and smooth muscle cells. The culture processes are dynamic and optimisation requires monitoring of key process variables. The chemical sensing in cell and tissue bioreactors described here has the long term aim of achieving automatic optimal control. Invasive and non-invasive electrochemical and optical systems are described for a wide range of target analytes (gases, ions, metabolites, hormones and proteins), but emphasis is on O 2 , pH, CO 2 and glucose. The sensing is performed with: (a) interrogation via the bioreactor wall; (b) probes placed within the cell culture chamber; (c) analysis within a shunt/sampling chamber. Analysis of culture medium is used for measurement of glucose and for proteins that are markers of cell biosynthetic behaviour. Optical absorbance and scatter of cells and tissues are also investigated for both chemical and structural analysis

关键词： Bioreactors Cells (biology) Optical scattering Biomedical optical imaging Optical sensors Proteins Sugar Chemical analysis Tissue engineering Chemical engineering

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Analysis of Human Learning Process on Manual Control of Complex systems

Analysis of Human Learning Process on Manual Control of Comp...

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IEEE International Conference on systems, Man and Cybernetics

作者： Takakuni Goto Noriyasu Homma Makoto Yoshizawa Kenichi Abe Department of Electrical and Communication Engineering University of Tohoku Sendai Japan Faculty of Medicine University of Tohoku Sendai Japan Informnation Synergy Center University of Tohoku Sendai Japan Department of Computer Science College of Engineering Nihon University Fukushima Japan

In this paper, a novel analysis technique is applied for investigating human operators' trial and error learning process to control a nonholonomic system, 2-link planer underactuated manipulator (2PUAM). An essential core of the technique is to use a value function of the reinforcement learning scheme for revealing how the operators can find a control strategy. It is an advantage of the proposed technique compared to the others that a transition of the value function may explain the changes of the operators' strategies during the learning process. According to the results of the analysis, the operators tended to explore an objective trajectory first, and then shift to the tracking control of the trajectory. The tracking was accompanied with acceleration to achieve the goal faster. Interestingly, the acceleration disturbs the objective trajectory due to the complex dynamics of the target, and induces another exploration to get better trajectories. The fact that this phase transition structure under unsupervised learning environment is consistent with previously reported results for a supervised case implies that the structure can be a general nature of human learning process.

关键词： Human factors Control systems Trajectory Learning Automatic control Error correction Metalworking machines Target tracking Acceleration Mechanical systems

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Binary sequences with optimal correlations and large linear span

Binary sequences with optimal correlations and large linear ...

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2006 IEEE International Conference on communications, ICC 2006

作者： Xiangyong, Zeng Lei, Hu Qingchong, Liu Yuhong, Zhu Faculty of Mathematics and Computer Science Hubei University Wuhan Hubei 430062 China Graduate School Chinese Academy of Sciences 19A Yuquan Road Beijing 100049 China Department of Electrical and System Engineering Oakland University Rochester MI 48309 United States Laudis Systems LLC 80 Newfield Avenue Edison NJ 08837 United States

ISBN: (纸本)1424403553

A family of binary sequences is presented and proved to have optimal correlations and large linear span. It includes the small set of Kasami sequences, No sequence set and TN sequence set as special cases. A lower bound on the linear span of the family is provided. With suitable choices of parameters, it is proved that the family has exponentially larger linear spans than both No sequences and TN sequences. © 2006 IEEE.

关键词： Binary sequences

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The TactaPack: A Wireless Sensor/Actuator Package for Physical Therapy Applications

The TactaPack: A Wireless Sensor/Actuator Package for Physic...

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International Symposium on Haptic Interfaces for Virtual Environment and Teleoperator systems (HAPTICS)

作者： R.W. Lindeman Y. Yanagida K. Hosaka S. Abe Department of Computer Science Worcester Polytechnic Institute USA Department of Information Engineering Faculty of Science and Technology Meijo University Japan Media Information Science Laboratories ATR International Japan Intelligent Robotics and Communication Laboratories ATR International Japan

In this paper, we present preliminary work we have done on designing the TactaPack, a wearable sensor/actuator device that uses a Bluetooth wireless connection to return sensor data to a host, and to receive commands to initiate expressive vibrotactile stimuli. We present our work in the context of a physical therapy application designed to provide more autonomy for patients when performing rehabilitative exercises. This assistive technology has the potential to reduce injuries during therapy due to improper patient joint movement, and decrease the workload of physical therapists, thereby reducing healthcare costs. Though still in the early stages of design, we believe the TactaPack can be used to produce systems that are less cumbersome than current, wired solutions, and simplify the creation of high-level applications by offloading from the CPU to the device the process of sensing, testing against threshold values, and actuation.

关键词： Wireless sensor networks Actuators Packaging Medical treatment Wearable sensors Bluetooth Injuries Medical services Costs system testing

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Implementation issues in the design of application protocol solutions for deep space environments

Implementation issues in the design of application protocol ...

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International Symposium on Performance Evaluation of computer and Telecommunication systems 2006, SPECTS 2006, Part of the 2006 Summer Simulation Multiconference, SummerSim 2006

作者： De Cola, Tomaso Ernst, Harald Marchese, Mario CNIT - Italian National Consortium for Telecommunications Genoa Research Unit University of Genoa Via Opera Pia 13 16145 Genoa Italy DLR-Deutschen Zentrum für Luft- und Raumfahrt German Aerospace Center Institute for Communications and Navigation 82234 Wessling Germany Faculty of Engineering University of Genoa Department of Communication Computer and System Sciences Via Opera Pia 13 16145 Genoa Italy

ISBN: (纸本)9781622763535

The extension of telecommunication frontiers towards deep space scenarios has opened new horizons in the way of designing networking infrastructures and has raised the necessity of developping novel communication paradigms, more suited to this specific environment. Under this view, given the hazardous operative conditions (very large latencies and frequent link disconnections), in which the exchange of data has to be performed among remote peers, the exploitation of TCP-based transmission schemes does not offer satisfactory results. On the contrary, the use of erasure coding schemes and more appropriate Automatic Repeat reQuest(ARQ) approaches, available within the Packet Layer Coding-based protocols and the Consultative Committee for Space Data systems (CCSDS) protocol architectures respectively, assure better performance results. In this paper, the adoption of erasure codes within CCSDS protocol stack is considered, and its effectiveness is evaluated with respect to ARQ-based transmission schemes available within the CCSDS File Delivery Protocol and hence proposing a combined use of erasure codes and ARQ schemes in order to optimize the overall performance.

关键词： Markov processes

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Using diversity statements to promote engagement with diversity and teaching

Using diversity statements to promote engagement with divers...

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113th Annual ASEE Conference and Exposition, 2006

作者： Turns, Jennifer Linse, Angela VanDeGrift, Tammy Eliot, Matt Jones, Jana Lappenbusch, Steve University of Washington United States Department of Technical Communication University of Washington United States Temple University United States Teaching and Learning Center Temple University United States National Science Foundation Grant Investigating the Teaching Challenges of Engineering Faculty United States University of Portland United States Computer Science Department University of Portland United States Microsoft Corp. United States San Francisco Bay Area United States

For many engineering educators, the topic of diversity can be frustrating and difficult. Writing and sharing individual diversity statements represents one strategy for empowering educators in their efforts to address diversity in their teaching. In this paper, we present the results of an empirical study in which graduate students (future engineering educators) prepared diversity statements as part of a teaching portfolio program. We focused our analysis on the discussions associated with diversity statement program sessions and found the talk during these sessions to be characterized by a variety of teaching and diversity ideas, an interweaving of teaching and diversity ideas, and equitable contribution among participants. We believe these results suggest that the diversity statement exercise has promise while also illustrating that graduate students are capable of tackling this complex issue with some success. © American Society for engineering Education, 2006.

关键词： engineering education

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Interoperable adaptive educational hypermedia: A web service definition

Interoperable adaptive educational hypermedia: A web service...

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6th International Conference on Advanced Learning Technologies, ICALT 2006

作者： Meccawy, Maram Celik, Ilknur Cristea, Alexandra Stewart, Craig Ashman, Helen School of Computer Science and Information Technology University of Nottingham Jubilee Campus Wollaton Road Nottingham NG8 1BB United Kingdom Information System Department Faculty of Mathematics and Computing Science Technical University Eindhoven Den Dolech 2 5600 MB Eindhoven Netherlands Department of Electronic Engineering Queen Mary University of London Mile End Road London El 4NS United Kingdom

ISBN: (纸本)0769526322

This paper presents an approach to resolve the problem of authoring and interchanging educational material, based on web services. Here we describe the ultimate goal, of reusing and interchanging freely adaptive eleaming material, shortly sketch previous solutions, showing their benefits but also limitations and then introduce our web-service based approach. Finally, we discuss the gains brought by our proposed solution. © 2006 IEEE.

关键词： E-learning

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Interoperability between AEH user models

Interoperability between AEH user models

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Joint International Workshop on Adaptivity, Personalization and the Semantic Web, APS'06

作者： Stewart, Craig Celik, Ilknur Cristea, Alexandra Ashman, Helen Department of Electronic Engineering Queen Mary University of London Mile End Road London E1 4NS United Kingdom School of Computer Science and Information Technology University of Nottingham Jubilee Campus Wollaton Road Nottingham NG8 1BB United Kingdom Information System Department Faculty of Mathematics and Computing Science Technical University Eindhoven Den Dolech 2 5600 MB Eindhoven Netherlands

ISBN: (纸本)1595934537

Creating a good quality Adaptive Educational Hypermedia (AEH) system involves a great expenditure of time, effort and money, especially to author the materials in order to implement adaptivity. Moreover, authoring AEH systems is as hard as maintaining them. Furthermore, with the new advances in AEH development, the authored content in a given system can become outdated very rapidly. When the massive overhead in authoring is combined with the possibility of the current AEH system becoming unavailable due to lack of maintenance, providing interoperability of adaptive systems becomes necessary. This paper describes our research on providing interoperability of user models between different AEH systems via a one-to-one conversion between two AEH systems, MOT and WHURLE. Here, we identify the differences and commonalities and address how these influence the efficiency of the conversion of the two systems' user models. Although this conversion is done via simple peer-to-peer interaction, it can be easily extended to make use of semantic web technologies, as for example RDF or XML conversion formats, or web services for user model exchange. Therefore, we consider that our work on feature extractions sets the basis for such conversions for the Web and Semantic Web. Copyright 2006 ACM.

关键词： Education

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High Velocity Particle Cloud Generation by Pulse Laser Ablation of Ground Glass Surface

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AIP Conference Proceedings 2006年第1期830卷 268-271页

作者： Kunihito Nagayama Yuriko Kotuska Motonao Nakahara Shiro Kubota 1Department of Aeronautics and Astronautics Faculty of Engineering Kyushu University Fukuoka 812‐8581 Japan 2Department of Computer and Communication Faculty of Engineering Fukuoka Institute of Technology Fukuoka 811‐0295 Japan 3Research Center for Explosion Safety National Institute of Advanced Industrial Science and Technology AIST Tsukuba 305‐8569 Japan

Enhancement of laser energy absorption has been demonstrated by pulse laser ablation of solid target whose surface was intentionally roughened. We have studied pulse laser ablation of roughened surface of ground glass surface by focusing a laser pulse through transparent plate from rear side. Ablation process has been observed by high speed framing camera. Burst of small fragments of glass has been observed in the present experiment. By using ns‐duration Nd:YAG laser of around 100 mJ per pulse, observed peak velocity of glass particle cloud ranges 0.5 km/s to 1.5 km/s. SEM observation of the ground glass surface revealed that virgin glass surface is covered with plenty of micro cracks, while cleavage surface structure has been evidenced in the damaged surface area.

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