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International Conference on Mobile Computing and Networking, MobiCom'07 Co-Located Workshops - Proceedings of the First ACM Workshop on Sensor and Actor Networks, SANET'07 2007年 35-42页

作者： Crepaldi, Riccardo Harris III, Albert F. Kooper, Rob Kravets, Robin Maselli, Gaia Petrioli, Chiara Zorzi, Michele Department of Computer Science University of Illinois Urbana-Champaign United States Department of Computer Science University of Rome La Sapienza Italy Department of Information Engineering University of Padova Italy National Center for Supercomputing Applications University of Illinois Urbana-Champaign United States

ISBN: (纸本)9781595937353

With the increase in the number of sensors and actuators available to ubiquitous computing systems comes the need for architectures that can support the development of intelligent applications and expose the rich control and monitoring capabilities provided by these devices to users. In this work, we present a description of the parameters used to define services provided by sensors and actuators. Using this understanding of the devices that provide sensing and control throughout the environment, we present thedesign of Meditrina, a ubiquitous computing architecture. Meditrina provides clean interfaces for application designers to leverage devices in the environment to support the activities of users in a large variety of scenarios. To demonstrate the power and feasibility of Meditrina, we implemented a prototype, including a room lighting control application. Through the use of the prototype, we show how the architecture facilitates the quick implementation of applications that can react to and affect the environment, even in the face of device failure.

关键词： Ubiquitous computing

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Efficient channel allocation based on priority of the video in VoD systems

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3rd Asian Applied Computing Conference, AACC 2005

作者： Sujatha, D.N. Rajesh, K.V. Girish, K. Venugopal, K.R. Patnaik, L.M. Department of Computer Science and Engineering Bangalore University India Microprocessor Applications Laboratory Indian Institute of Science Bangalore India

ISBN: (纸本)1860948278

Today's technology offers easy access to multimedia services through high-speed communication networks. A Video-on-Demand (VoD) service allows customers to connect to an on-line video server and asynchronously watch videos. A Video-on-Demand system is typically implemented by Client-Server architecture. This paper presents a scheme of channel allocation based on priority of the requested video, to increase efficient channel utilization and lower the download time. This allocation scheme shows better performance when compared to conventional way of allocating channels.

关键词： Multimedia services

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Complexity measures for software components

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WSEAS Transactions on computers 2007年第7期6卷 1005-1012页

作者： Sharma, Arun Kumar, Rajesh Grover, P.S. Amity Institute of Information Technology Amity University Uttar Pradesh India School of Mathematics and Computer Applications Thapar Institute of Engineering and Technology Patiala India Department of Computer Science Delhi University Delhi India

In last decade, object-oriented concept is not so much powerful and adequate to cop up the requirements of rapid changes in ongoing applications. Component-Based Development (CBD) has emerged in a very fast way to address these changes, In CBD, software systems are built as an assembly of components already developed and prepared for integration. However, the quality aspects of software products are not adequately addressed by CBD. Complexity of components is a very essential attribute to be measured for components. The paper discusses various existing complexity metrics for traditional systems including object-oriented systems. It explores the possibilities whether some of these metrics can be applied for software components also or not. The paper proposes a new metric for measuring the complexity of software components. It also conducts an empirical study on a number of JavaBean components to evaluate the proposed metric. The correlation analysis of the proposed metric with Customizability metric, defined in the literature shows that highly complex components have a low value of customizability, thus very difficult to maintain.

关键词： Software engineering

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A huffman decoding algorithm in mobile robot platform

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Information Technology Journal 2007年第5期6卷 776-779页

作者： Ponalagusamy, R. Kannan, E. Arock, Michael Department of Mathematics National Institute of Technology Trichy 620 015 Tamilnadu India Department of Computer Science and Engineering Vel Shri Rengarajan Shaugunthala High Tech Engineering College Chennai 600 062 Tamilnadu India Department of Computer Applications National Institute of Technology Trichy 620 015 Tamilnadu India

In the field of mobile robotics, data is transmitted from the robot over low bandwidth channels or incrementally in short bursts to a host, where it can be further processed for visualization. JPEG-LS is the one of the image and file compressions, in which the Huffman decoding is used to compress the result of quantization stage. In the recent production and management scenario, advanced factories require first an increasing degree of automation to reduce the product cost and, second, availability of greater flexibility of output and product types. To meet such requirements in near future, the factories need to link the flow of material, energy and information together more efficiently. In order to link the flow of information with other entities, we have to involve data compression, coding and decoding techniques. The speed is very demanding for such applications which in turn motivate to develop a fast decoding algorithm to meet the challenges arising in the field of predicting collision free path for robot. Huffman decoding has been widely used in data, image and video compression. This motivates the present work. For a Concurrent Read and Exclusive Write (CREW), Parallel Random Access Machine (PRAM) model with N processors, we propose a parallel algorithm for Huffman decoding in this paper. The algorithm employs (N+1)-ary search, which is parallel version of binary search. Its time complexity amounts to O (log N+1 (n+1)), where n is the number of symbols in a Huffman tree. © 2007 Asian Network for Scientific Information.

关键词： Decoding

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A hybrid clustering and classification technique for soil data mining

A hybrid clustering and classification technique for soil da...

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IET-UK International Conference on Information and Communication Technology in Electrical sciences, ICTES 2007

作者： Vibha, L. HarshaVardhan, G.M. Prashanth, S.J. Shenoy, P Deepa Venugopal, K.R. Patnaik, L.M. Department of Computer Science and Engineering University Visvesvaraya College of Engineering Bangalore 560 001 India Microprocessor Applications Laboratory Indian Institute of Science Bangalore 560 012 India

ISBN: (纸本)9780863419379

Predictive soil modelling using geostatistical methods is a research concept in modern soil science and soil geography for the last two decades. One of the reasons for this lack of soil spatial data is that conventional soil survey methods are relatively slow, qualitative and expensive. Spatial data sets covering large areas like digital geomorphographical maps, geological, land use, and climate data are available and these geo-datasets contain information about soil formation and resulting hydrologic variables etc which are needed to extract relevant soil information. In this paper we present an efficient hybrid model that was achieved by first clustering the data and then classifying it, and using the spatial conceptual information extracted from the environmental variables. This paper assists in assessment of the status of food production associated with land degradation and estimate indicators of soil nutrient mining by a country and region. The findings and conclusions of this paper result from the monitoring of the nutrient mining of agricultural lands in a country which have a direct implication on policy development. We propose a framework where soil is classified into different types, then a future work could be to predict soil fertility, based on which you can decide upon the fertilisers and suitable crops that could be cultivated with expertise.

关键词： Soils

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Probabilistic Average Energy Flooding to maximize lifetime of mobile ad hoc networksx

Probabilistic Average Energy Flooding to maximize lifetime o...

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3rd International Conference on Wireless Communication and Sensor Networks (WCSN-2007)

作者： Thriveni, J. Vishwanath, K.R. Venugopal, K.R. Patnaik, L.M. Department of Computer Science and Engineering University Visvesvaraya College of Engineering Bangalore University Bangalore 560 001 India Microprocessor Applications Laboratory Indian Institute of Science Bangalore India

Wireless mobile ad hoc stations have limited battery capacity, hence, ad hoc routing protocols ought to be energy conservative. Route discovery is a common operation in routing to resolve many issues. In a Mobile Ad Hoc Network (MANET) in particular, due to host mobility, such operations are expected to be executed more frequently. A straightforward broadcasting by flooding is usually very costly and will result in serious redundancy, contention, and collision, resulting in broadcast storm problem. In this paper, an algorithm is proposed to improve flooding performance of Ad Hoc On-Demand Distance Vector (AODV) routing protocol called, Probabilistic-Average-Energy-flooding (PAEF) which periodically performs an averaging algorithm Calculate-Average-Energy (CAE) to estimate the average energy Eavg. This algorithm is used in route discovery process to make a rebroadcast decision by the node. Our simulation results show an improvement in the network lifetime and the throughput compared to traditional AODV.

关键词： Mobile ad hoc networks

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Robust and high capacity image steganography using SVD

Robust and high capacity image steganography using SVD

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IET-UK International Conference on Information and Communication Technology in Electrical sciences, ICTES 2007

作者： Babu, K Suresh Raja, K.B. Rao K, Uma Maheshwar A.R.K., Rashmi K R.V.K., Venugopal K Patnaik, L.M. Department of Computer Science and Engineering University Visvesvaraya College of Engineering Bangalore University Bangalore 560 001 India Microprocessor Applications Laboratory Indian Institute of Science Bangalore India

ISBN: (纸本)9780863419379

Steganography plays an important role in the field of information hiding for secret communication. The proposed algorithm Robust and high capacity image steganography using SVD (RHISSVD) is based on singular value decomposition (SVD) transform of digital images. In this technique two important properties of SVD are utilized, namely (i) The singular values (SV) represents luminance or energy of the digital image layer. (ii) The respective pair of singular vectors represents the image geometry. Slight variation of the SV cannot affect the visual perception of the image. The cover image is transformed in to SVDs and the secret message to be transmitted is embedded in to singular values of cover image. It is observed that RHISSVD has an improvement in PSNR and capacity compared to existing algorithms.

关键词： Singular value decomposition

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Self-Healing antchain for increasing lifespan in wireless sensor networks

Self-Healing antchain for increasing lifespan in wireless se...

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IET-UK International Conference on Information and Communication Technology in Electrical sciences, ICTES 2007

作者： Tarannum, Suraiya Anitha, V. Priya, A.G. Adrakatti, Rajeshwari Nalini, L. Venugopal, K.R. Patnaik, L.M. Department of Computer Science and Engineering University Visvesvaraya College of Engineering Bangalore - 560 001 India Microprocessor Applications Laboratory Indian Institute of Science Bangalore-560 012 India

ISBN: (纸本)9780863419379

A Wireless Sensor Network (WSN) consists of a large number of randomly deployed sensor nodes. These sensor nodes organize themseleves into a cooperative network and perform the three basic functions of sensing, computations and *** paper proposes a at-routing technique for such a network consisting of homogenous nodes. It is an energy-effiient data gathering protocol where sensor nodes in the network form an Antchain. The role of Antchain head and Antchain tail for each data gathering process is scheduled by means of a Time Division Multiple Access technique which ensures uniform depletion of energy among sensor nodes. The real advantage comes to light in the event of the death of a node. The proposed algorithm heals the network in such a way that only one node communicates with the base station at the end of the data gathering process. Simulation results indicate that Self-Healing AntChain performs better than other AntChain systems in terms of network lifetime, average energy consumed and aggregated data delivery ratio, in addition to being a highly fault-tolerant, exible and adaptive system.

关键词： Sensor nodes

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Soft computing in concrete technology: A pragmatic appraisal

Soft computing in concrete technology: A pragmatic appraisal

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3rd Indian International Conference on Artificial Intelligence, IICAI 2007

作者： Jayaram, M.A. Nataraja, M.C. Ravikumar, C.N. Department of Master of Computer Applications Siddaganga Institute of Technology Tumkur-572103 India Department of Civil Engineering Sri Jayachamarajendra College of Engineering Mysore-570006 India Department of Computer Science and Engineering Sri Jayachamarajendra Coolege of Engineering Mysore-570006 India

ISBN: (纸本)9780972741224

There has been a growing interest among the researchers in the area of soft computing assisted material modeling in general and modeling of concrete in particular. Their results look very promising. Concrete is a heterogeneous material with complex behavior and is not amenable for crisp mathematical predications. Most of the inferences regarding the material behavior are formulized after going through experimental results that consists of equipment imprecision, tolerances and human factor. The analytical modeling of concrete using traditional methods is arduous and not robust. Further, the mathematical models developed using traditional statistical methods are generally based on assumed relationships and do not have the true predicting capability outside the experimental domain used for their development. Unlike traditional parametric methods, the soft computing methods do not assume a relationship between various parameters and concrete performance. The relationship is rather generated from the experimental data provided to build and train the model. This paper makes a modest attempt to present an elaborative discussion on the applications of soft computing techniques in concrete technology and their advantages. The published research work pertaining to applications of constituents of soft computing in general and hybrid systems in particular are discussed. The paper concludes with a briefing on the contribution of authors in this area. Copyright © 2007 IICAI.

关键词： Hybrid systems

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Parallel loop scheduling using knowledge-based workload estimation on grid environments

Parallel loop scheduling using knowledge-based workload esti...

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2007 International Symposium on applications and the Internet, SAINT

作者： Shih, Wen-Chung Yang, Chao-Tung Chen, Chun-Jen Tseng, Shian-Shyong Department of Computer Science National Chiao Tung University Hsinchu 30010 Taiwan High-Performance Computing Laboratory Department of Computer Science and Information Engineering Tunghai University Taichung 40704 Taiwan Department of Information Science and Applications Asia University Taichung 41354 Taiwan

ISBN: (纸本)0769527566

Parallel loop scheduling on grid environments is a challenging problem, especially for loops with irregular workload distribution. In the past, this problem of load imbalance resulting from irregular workload was not explicitly addressed. This paper proposes a new approach to schedule loop iterations with irregular workload on grid environments. Based on knowledge-based estimation of workload, the proposed method can dispatch an appropriate proportion of workload to each node for execution according to its performance. In addition, the scheduler uses historical statistics of CPU usage and network bandwidth to estimate the dynamically changing performance of each node. Two applications, regular type and irregular one respectively, are implemented and executed on a grid test-bed, which consists of four schools. Experimental results show that the new approach improves the performance on previous schemes. © 2007 IEEE.

关键词： Grid computing

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