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40th ACM Technical Symposium on computer science Education, SIGCSE 2009

作者： Tabrizi, M.H.N. Collins, Carol B. Kalamkar, Vipul Department of Computer Science East Carolina University Greenville NC 27858 United States BCA Programme MS University of Baroda Vadodara 390002 India

ISBN: (纸本)9781605585048

Students in software engineering need experiences that prepare them for a global work environment that is more and more likely to be structured around team work in which team members may come from a variety of disciplines and cultures and be geographically dispersed. New grads in software engineering are more and more likely to communicate with team members and managers solely via electronic means (e.g. teleconference, videoconference, e-mail, e-file sharing). This paper describes a highly successful international collaboration of students from two universities enrolled in undergraduate software engineering classes, one in the USA and the other in India. Within a semester, these students collaborated remotely to produce software for a leading international software development company. This collaboration, repeated for two semesters and planned for a third, met all learning objectives while successfully producing the desired software. This experience truly engaged our students and enabled the students to learn via a standard course in software engineering about many aspects of professional practice without resorting to special programs like co-op/internships, honors/research independent study, or capstones. © 2009 ACM.

关键词： Students

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Tree paths: A new model for steering behaviors

Tree paths: A new model for steering behaviors

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9th International Conference on Intelligent Virtual Agents, IVA 2009

作者： Rodrigues, Rafael Araújo De Lima Bicho, Alessandro Paravisi, Marcelo Jung, Cláudio Rosito Magalhães, Léo Pini Musse, Soraia Raupp Graduate Programme in Computer Science PUCRS Building 32 Av. Ipiranga 6681 Porto Alegre RS Brazil Graduate Programme in Applied Computing UNISINOS Av. Unisinos 950 São Leopoldo RS Brazil School of Electrical and Computer Engineering UNICAMP Av. Albert Einstein 400 Campinas SP Brazil

ISBN: (纸本)3642043798

This paper describes a model for generating steering behaviors of groups of characters based on the biologically-motivated space colonization algorithm. This algorithm has been used in the past for generating leaf venation patterns and tree structures, simulating the competition for space between growing veins or branches. Adapted to character animation, this model is responsible for the motion control of characters providing robust and realistic group behaviors by adjusting just a few parameters. The main contributions are related with the robustness, flexibility and simplicity to control groups of characters. © 2009 Springer Berlin Heidelberg.

关键词： Animation

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Procedural hair generation

Procedural hair generation

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8th Brazilian Symposium on Games and Digital Entertainment, SBGAMES2009

作者： Cassol, Vinícius Jurinic Marson, Fernando Pinho Musse, Soraia Raupp Graduate Programme in Computer Science Pontifícia Universidade Católica do Rio Grande do Sul - PUCRS Av. Ipiranga 6681 Porto Alegre RS Brazil

ISBN: (纸本)9780769539638

This paper presents a hair generation technique for cartoon and Anime characters. The main goal of this work is to provide a procedural generation technique, robust enough in order to create different types of hairs. We propose a parametric model that can produce diversity of obtained results through parameters variation. The model is organized in three steps: firstly, the strands generation, followed by positioning them in the head of the characters. Finally, the third step is responsible for providing cartoon rendering, including common characteristics in cartoon shading, as the black edges and solid colors. Visual inspection of obtained results indicate that generated hairs are coherent with expected in terms of visual aspects. © 2009 IEEE.

关键词： Cartoon Hair Hair Generation Procedural Modeling Hair procedural model Visual aspects Anime parameter variation

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VhCVE: A collaborative virtual environment including facial animation and computer vision

VhCVE: A collaborative virtual environment including facial ...

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8th Brazilian Symposium on Games and Digital Entertainment, SBGAMES2009

作者： Braun, Henry Hocevar, Rafael Queiroz, Rossana B. Cohen, Marcelo Moreira, Juliano Lucas Jacques Jr., Julio C. Braun, Adriana Musse, Soraia R. Samadani, Ramin Graduate Programme of Computer Science PUCRS Av Ipiranga 6681 Porto Alegre RS Brazil Hewlett Packard Laboratories 1501 Page Mill Rd. Palo Alto CA United States

ISBN: (纸本)9780769539638

In this paper we present a platform called VhCVE, in which relevant issues related to Collaborative Virtual Environments applications are integrated. The main goal is to provide a framework where participants can interact with others by voice and chat. Also, manipulation tools such as a mouse using computer Vision and Physics are included, as well as rendering techniques (e.g. light sources, shadows and weather effects). In addition, avatar animation in terms of face and body motion are provided. Results indicate that our platform can be used as a interactive virtual world to help communication among people. © 2009 IEEE.

关键词： Animation

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VhCVE: A Collaborative Virtual Environment Including Facial Animation and computer Vision

VhCVE: A Collaborative Virtual Environment Including Facial ...

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Brazilian Symposium on Games and Digital Entertainment (SBGAMES)

作者： Henry Braun Rafael Hocevar Rossana B. Queiroz Marcelo Cohen Juliano Lucas Moreira Julio C. Jacques Júnior Adriana Braun Soraia R. Musse Ramini Samadani Graduate Programme of Computer Science PUCRS Porto Alegre RS Brazil Hewlett Packard Laboratories Palo Alto CA USA

关键词： Collaboration Virtual environment Facial animation computer vision Application software Mice Physics Light sources Avatars Face detection

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An international collaboration in software engineering

SIGCSE Bulletin Inroads

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SIGCSE Bulletin Inroads 2009年第1期41卷 306-310页

作者： Tabrizi, M.H.N. Collins, Carol B. Kalamkar, Vipul East Carolina University Department of Computer Science Greenville NC 27858 United States M S University of Baroda BCA Programme Vadodara 390002 India

关键词： Students

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Decision trees as information source for attribute selection

Decision trees as information source for attribute selection

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IEEE Symposium on Computational Intelligence and Data Mining (CIDM)

作者： Kyoko Fukuda Brent Martin Environmental Science Programme Department of Mathematics and Statistics University of Canterbury Christchurch New Zealand Department of Computer Science and Software Engineering University of Canterbury Christchurch New Zealand

Attribute selection (AS) is known to help improve the results of algorithmic learning processes by selecting fewer, but predictive, input attributes. This study introduces a new ranking filter AS method, the tree node selection (TNS) method. The idea of TNS is to determine significant but fewer attributes by searching through the pre-generated decision tree as information source in the manner of a pruning process. To test the performance of TNS, 33 benchmark datasets (UCI) with various numbers of instances, attributes and classes were investigated along with five known AS methods, and the results were tested with the C4.5 (unpruned) and naive Bayes classifiers. The performance, in terms of classification accuracy improvement, reduction in the number of attributes and the size of the generated decision tree are assessed by various statistical analyses for multiple comparisons. TNS was found to provide the most consistent performance for C4.5 and naive Bayes classifiers, and generated unpruned C4.5 trees with selected fewer attributes were generally found to achieve similar quality to pruned C4.5 trees without any attribute selection.

关键词： Decision trees Classification tree analysis Filters Atmospheric measurements Pollution measurement Classification algorithms Gain measurement Air pollution Benchmark testing Statistical analysis

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Design of SOA based service stack for collaborative wireless sensor network

Design of SOA based service stack for collaborative wireless...

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International Conference on Wireless Communication and Sensor Networks

作者： Kamlendu Kumar Pandey S. V. Patel MSc(IT) Programme Veer Narmad South Gujarat University Surat India Department of Computer Science Veer Narmad South Gujarat University Surat India

In the current decade, substantial growth in number of wireless sensor network deployments to sense a wide array of data ranging from environmental to healthcare is observed. As these WSNs are designed with the goal to serve their own organisation without futuristic idea of sharing the data with others, their architectures pose a limitation to the purpose of collaboration. A design is presented in this paper to create stack of services, interfaces and repositories for a standard WSN set-up to support collaboration which will enable data sharing in efficient way. With the help of proposed architecture, the service brokers, federal agencies and individuals can make use of these services to enrich their understanding of geo-spatial and temporal behaviour of the sensed data. The SOA comes as the ready to use technological standard to implement the stack and its invocation.

关键词： Service oriented architecture Collaboration Wireless sensor networks Sensor arrays Collaborative work Medical services Sensor systems Monitoring computer science Scalability

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An estimate cost based algorithm for data aggregation routing in wireless sensor networks

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Journal of Computational Information Systems 2009年第4期5卷 1351-1356页

作者： Shao, Jie Ye, Ning Wang, Ruchuan Wang, Zhili College of Information Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016 China Department of Information Science Nanjing College for Population Programme Management Nanjing 210042 China College of Computer Nanjing University of Posts and Telecommunications Nanjing 210003 China

Wireless sensor network should decrease the power costs of redundancy information and delay time. The technology of data aggregation can be adopted. Data aggregation by sensor nodes may reduce data redundancy and hence curtail network load. In this paper, we proposed a novel estimate cost-based aggregation spanning tree routing algorithm (ECAA), which adopted directed transmission model and message route mechanism. The idea of this algorithm is optimization of data aggregation route by estimate cost about energy, distant and aggregation gain, then realizes data aggregation trade-off in energy and delay. The benefits of the algorithm were verified through simulation experiments. © 2009 Binary Information Press August, 2009.

关键词： Sensor nodes

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Arrayed Si/SiGe nanowire heterostructure formation via Au-catalyzed wet chemical etching method

Arrayed Si/SiGe nanowire heterostructure formation via Au-ca...

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Nanotechnology - General - 214th ECS Meeting/PRiME 2008

作者： Wang, X. Pey, K.L. Choi, W.K. Ho, C.K.F. Fitzgerald, E. Antoniadis, D. Advanced Materials for Micro- and Nano-Systems Programme Singapore-MIT Alliance 4 Engineering Drive 3 Singapore 117576 Singapore School of Electrical and Electronic Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore Department of Electrical and Computer Engineering National University of Singapore 4 Engineering Drive 3 Singapore 117576 Singapore Department of Materials Science and Engineering Massachusetts Institute of Technology Cambridge MA 02139 United States Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA 02139 United States

ISBN: (纸本)9781615672998

Aligned Si/SiGe nanowire heterostructures have been formed using Au-assisted top-down chemical etching method combined with nanosphere lithography. Since the nanowires are formed from the as-grown films, the heterostructures along the axial axis of the formed nanowires, i.e. axial heterostructures, are replica of the grown layered film structure. Thus SiGe nanowire heterostructures can be readily formed along the axis using an as-grown heterostructured film. By applying a nanosphere lithography technique, the space, diameter, and density of the nanowires can be controlled and readily formed at specifically defined area. Because of the flexibility and simplicity of this method, nanowires with embedded junctions of different doping characteristics and Si/Ge concentrations can be fabricated easily. Si and its Ge alloy nanowires and one dimensional heterostructures formed using this method may have great potential for vertical logic, photovoltaic and memory device applications. ©The Electrochemical Society.

关键词： Nanowires

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