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检索条件"任意字段=7th IASTED International Conference on Advances in Computer Science and Technology"

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An indexing structure for mobile objects utilizing late update

An indexing structure for mobile objects utilizing late upda...

引用

7th international conference on Information technology - New Generations, ITNG 2010

作者： Barrios, Justin Kami Makki, S. Karimi, Masoumeh Department of Computer Science Harding University United States Department of Computer Science Lamar University United States TUM Miami United States

ISBN: (纸本)9780769539843

the recent technological advances in location aware, mobile and wireless devices have facilitated tracking and monitoring of moving objects. However, these capabilities require storage structures that allow the speedy access and fast retrieval of information for these objects. therefore, there is increasing interest in storage and indexing structures based on a variety of R-trees. these tree structures use the concept of Minimum Bounding Rectangle (MBR) to represent regions that the nodes of these trees cover, in which the parent nodes may represent MBRs with larger sizes to hold the MBRs of the child nodes. this form of presentation not only is an effective strategy to retrieve objects in an arbitrary arrangement, but also it provides opportunity to delay the update operation for the location of moving objects. In this paper therefore, we propose a spatial and temporal indexing structure which uses delay update strategy for updating the location of moving objects. © 2010 IEEE.

关键词： Location

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A cooperative robot path planner based on cellular automata and artificial ant colonies

A cooperative robot path planner based on cellular automata ...

引用

6th iasted international conference on advances in computer science and Engineering, ACSE 2010

作者： Ioannidis, K. Sirakoulis, G.Ch. Andreadis, I. Department of Electrical and Computer Engineering Section of Electronics and Information Systems Technology Democritus University of Thrace GR - 67100 Xanthi Greece

ISBN: (纸本)9780889868311

the path planning problem is one of the major tasks in the field of robotics. In systems of multiple robots, the creation of collision free paths becomes even more complex due to the fact that all robots must complete one specific task as a team. Forming a specific pattern while the robotic team covers a predefined distance, is a common task in cooperative robotics. the complexity of the problem increases with the number of members of the team. this paper proposes a novel path planning algorithm using a combination of Cellular Automata (CA) and Ant Colony Optimization (ACO) techniques to create collision free paths for each robot of the team. the team is divided into subgroups and optimal paths are created using an ACO algorithm. If the algorithm is not applicable, for example, due to lack of pheromone, then paths are created using a CA path planner. the simplicity of the method relies on the fact that it uses fixed discrete values and a probabilistic method to reduce the complexity of the entire system. Simulation results indicate that the proposed method can produce accurate collision free paths even in systems comprising of large number of robots.

关键词： Motion planning

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Bandwidth preservation tree peer to peer algorithm

Bandwidth preservation tree peer to peer algorithm

引用

6th iasted international conference on advances in computer science and Engineering, ACSE 2010

作者： Mikki, Mohammad A. Al-Khoudary, Mohammed R. Computer Engineering Department Islamic University of Gaza P.O. Box 108 Gaza Palestine Islamic University of Gaza Information Technology Unit P.O. Box 108 Gaza Palestine

ISBN: (纸本)9780889868311

As the network bandwidth increases due to technology advancement, the need for downloading and uploading mechanisms at high rates increases too. Media and files around the world are being shared using many technologies including peer to peer and file servers. In this paper we develop a Bandwidth Preservation Tree (BPT) peer to peer algorithm which is an alternative algorithm to Rarest First algorithm in Bit torrent peer to peer technology. BPT algorithm uses a bandwidth Preservation Tree to force peers to download missing blocks of rare media file from their parents only. In BPT, the upload speed (bandwidth) of the parent is equal to the total download speeds (bandwidths) of the children. this enables peers to download missing blocks from their parents with their maximum speed, and guarantees that the parent peers are not overwhelmed by too many download requests. To validate the proposed BPT algorithm we built a simulator for both Rarest First algorithm and BPT algorithm. We measured the time it takes peers to download a full copy of a rare media under different circumstances including varying number of peers in the network, varying number of level 1 peers in the bandwidth preservation tree, and varying rare media file size. Results show that BPT approach produces complete copies of the rare media file in peers faster than Rarest First algorithm.

关键词： Bandwidth

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Neural prosthetic asynchronous control using EEG

Neural prosthetic asynchronous control using EEG

引用

6th iasted international conference on advances in computer science and Engineering, ACSE 2010

作者： Farid, Mina Rizkalla, Nevine Fahmy, Mark Daoud, Mary El-Ayat, Khaled Computer Science Department American University Cairo Egypt

ISBN: (纸本)9780889868311

Brain computer Interface (BCI) provides a direct neural interface and communication pathway between the human brain and an external device such as a computer or artificial limb. With such an interface a severely handicapped person, such as an Amyotrophic Lateral Sclerosis (ALS) patient, with severe muscle disorder may still communicate with and even control their environment relying using his brain activity. Even patients suffering from locked-in syndrome where they cannot move or communicate due to complete paralysis can communicate and control using BCI technology. the Neural Prosthetic Asynchronous Control (NPAC) system described asynchronously controls neural prosthetic devices for paralyzed patients. It captures EEG signals emitted from the brain, performs signal processing and classification on the captured raw signals, and produces appropriate control actions accordingly. NPAC analyzes Mu signals whose activity is associated with the motor cortex and altered with motion or intended (imagined) motion. In this paper, we describe our method, and empirically show that NPAC achieved good accuracy for trained subjects in real-time environment. NPAC classifies right hand "imagined" movement, brain rest state, eye blinks, and eye looking down. It was tested on a trained non-paralyzed subject who managed to do several control activities such as controlling a wheelchair, moving a prosthetic device (both emulated on a robot), playing simple games, and navigating through virtual reality.

关键词： Brain computer interface

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Scalable and parallel implementation of a financial application on a GPU: With focus on out-of-core case

Scalable and parallel implementation of a financial applicat...

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10th IEEE international conference on computer and Information technology, CIT-2010, 7th IEEE international conference on Embedded Software and Systems, ICESS-2010, 10th IEEE Int. Conf. Scalable Computing and Communications, ScalCom-2010

作者： Lee, Myungho Jeon, Jin-Hong Kim, Joonsuk Song, Joonhyun Dept of Computer Science and Engineering Myong Ji University Yong In Gyung Gi Do Korea Republic of Anycasting Inc. Korea Republic of

ISBN: (纸本)9780769541082

the architecture of the latest Graphic Processing Unit (GPU) consists of a number of uniform programmable units integrated on the same chip, which facilitate the general-purpose computing beyond the graphic processing. With the multiple programmable units executing in parallel, the latest GPU shows superior performance for many non-graphic applications. Furthermore, programmers can have a direct control on the GPU pipeline using easy-to-use parallel programming environments. these advances in hardware and software make General-Purpose GPU computing (GPGPU) widespread. In this paper, we parallelize a computationally demanding financial application and optimize its performance on a latest GPU. We also analyze the performance results compared with those obtained using CPU only. Experimental results show that GPU can achieve a superior performance, greater than 190x, compared with the CPU-only case when the data fits in the graphic memory. We also address the performance issue in the out-of-core case where the data cannot fit in the device memory on the GPU. In such a case, by using streaming technique helps make up the performance gap lost due to data transfer overhead from the CPU side to the GPU DRAM. © 2010 IEEE.

关键词： Graphics processing unit

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Modeling of system software for computer based training

Modeling of system software for computer based training

引用

7th international conference on Information technology - New Generations, ITNG 2010

作者： Braga, José R. G. Mendes, Joice B. Júnior, Laércio A. B. Ramos, Alexandre C. B. Universidade Federal de Itajubá Av. BPS 1303 Pinheirinho. 37500-903. Itajubá. MG Brazil

ISBN: (纸本)9780769539843

With major technological advances and to reduce the cost of training apprentices for real-time critical systems, it was necessary to the development of Intelligent Tutoring Systems for training apprentices in these systems. these systems, in general, have interactive features so that the learning is actually more efficient, making the learner is more familiar with the mechanism in question. In the home stage of learning, tests are performed to obtain the student's income, a measure on their use. the aim of this paper is to present the modeling of Tutorial of Intelligent Systems using the UML language. the various steps of the analysis are considered the diagrams required to build a general model, whose purpose is to present the different perspectives of its development. © 2010 IEEE.

关键词： E-learning

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A minimization problem in wireless sensor networks

A minimization problem in wireless sensor networks

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9th iasted international conference on Parallel and Distributed Computing and Networks, PDCN 2010

作者： Curran, John Chen, Xiao Department of Computer Science Texas State University San Marcos TX 78666 United States

ISBN: (纸本)9780889868205

Wireless sensor networks are now widely used in military and civilian surveillance with new advances in wireless technology. We consider the cooperation of non-imaging sensors and cameras, of which the non-imaging sensors are deployed to monitor an area continuously. If an event occurs, the sensors can trigger cameras to record further information. In this paper, we investigate the problem of triggering cameras using as few sensors as possible in this kind of environment. We first study the case of finding the minimum number of sensors needed to trigger the cameras from all-off to all-on in a grid topology. We then extend this to switch cameras from any initial states to any target states, in a grid topology. Finally we extend our problem to include switching cameras from any initial states to any target states with a random topology. It turns out that the solutions to this problem, if there are any, can be obtained by solving matrix equations in linear algebra. As far as we know, this problem has not been discussed before.

关键词： Wireless sensor networks

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RoboJockey: Real-time, simultaneous, and continuous creation of robot actions for everyone

RoboJockey: Real-time, simultaneous, and continuous creation...

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7th international conference on advances in computer Entertainment technology, ACE 2010

作者： Shirokura, Takumi Sakamoto, Daisuke Sugiura, Yuta Ono, Tetsuo Inami, Masahiko Igarashi, Takeo Graduate School of Information Science and Technology Hokkaido University JST ERATO Japan JST ERATO Japan Graduate School of Media Design Keio University JST ERATO Japan Graduate School of Information Science and Technology Hokkaido University Japan Computer Science Department University of Tokyo JST ERATO Japan

ISBN: (纸本)9781605588636

We developed a RoboJockey (Robot Jockey) interface for coordinating robot actions, such as dancing, similar to a "disc jockey" or "video jockey" who selects and plays recorded music or video for an audience, in this case, robot's actions, and giving people a new entertainment experience with robots. the system enables a user to choreograph a robot to dance using a simple visual language. Every icon on the interface is circular and can be operated from all positions around the tabletop interface. Users can coordinate the mobile robot's actions with a combination of back, forward, and rotating movements, and the humanoid robot's actions with a combination of arm and leg movements. Every action is automatically performed to background music. We demonstrated RoboJockey at a Japanese domestic symposium, and confirmed that people enjoyed using the system and successfully created entertaining robot dances. © 2010 ACM.

关键词： Visual languages

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Proceedings of the 4th iasted international conference on advances in computer science and technology, ACST 2008

Proceedings of the 4th IASTED international conference on ad...

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4th iasted international conference on advances in computer science and technology, ACST 2008

ISBN: (纸本)9780889867307

the proceedings contain 70 papers. the topics discussed include: a reinforcement profile learning agent for documents filtering;energy landscape for Hopfield network programmed with program clauses;a comparison of neural network methods and Box-Jenkins model in time series analysis;using timestamp ordering in synchronizing Internet-based workflows;FPGA implementation of microcode-based and FSM-based memory built-in self test controllers;parallel computation for LUC cryptosystems on distributed memory multiprocessor machine;a new method of requirements engineering process design;crash-proof systemic computing: a demonstration of native fault-tolerance and self-maintenance;cognitive modeling in computational intelligence methods for medical pattern semantic categorization and understanding;and convergence comparison of LPC derived coefficients for speech pattern.

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Tactile Wayfinder: Comparison of Tactile Waypoint Navigation with Commercial Pedestrian Navigation Systems

<i>Tactile Wayfinder</i>: Comparison of Tactile Waypoint Nav...

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7th international conference on Pervasive Computing

作者： Pielot, Martin Boll, Susanne OFFIS Institute for Information Technology Germany

ISBN: (纸本)9783642126536

In this paper we report on a field study comparing a commercial pedestrian navigation system to a tactile navigation system called Tactile Wayfinder. Similar to previous approaches the Tactile Wayfinder uses a tactile torso display to present the directions of a route's waypoints to the user. It advances those approaches by conveying the location of the next two waypoints rather than the next one only, so the user already knows how the route continues when reaching a waypoint. Using a within-subjects design, fourteen participants navigated along two routes in a busy city centre with the Tactile Wayfinder and a commercial pedestrian navigation system. We measured the acquisition of spatial knowledge, the level of attention the participants had to devote to the navigation task, and the navigation performance. We found that the Tactile Wayfinder freed the participants' attention but could not keep up with the navigation system in terms of navigation performance. No significant difference was found in the acquisition of spatial knowledge. Instead, a good general sense of direction was highly correlated with good spatial knowledge acquisition and a good navigation performance.

关键词： Tactile Displays Pedestrian Navigation Wayfinding Tactons

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