Current Issue : January - March Volume : 2014 Issue Number : 1 Articles : 6 Articles
The nodes being used in Wireless Sensor Networks (WSN) pose particular challenge to communicate with one\r\nanother using TCP/IP especially when considering security applications. This paper investigates the limitations of\r\ncurrent TCP/IP structure and an integration using micro IP (�µIP) and proposes an enhanced security technique for\r\nWSN nodes to solve issues arising from the node congestion due to data distribution of keys with a better method\r\nfor securing the data in the network. The summation of this method involves the integration of �µIP stack to key\r\nmanagement scheme, allowing the network to have extra security in the transmission and reception of data, and can\r\nbe applied in hazardous areas where the sensor nodes are used without complications....
This paper proposes a review on various methods employed to design Asynchronous viterbi decoder for low power consumption. It also focuses on the comparative study of synchronous and asynchronous low power design methodologies ranging from System level to Layout level are presented. The paper describes the various decoding techniques used for reducing the switching activity by avoiding unnecessary Memory operations. It also states the Protocols used for asynchronous viterbi decoder to synchronize and communicate the various units of viterbi decoder and to reduce power dissipation....
Making information and telecommunications available is a permanent challenge for cities concerned with urban\r\nplanning and development focused on citizens� quality of life and effective municipal management. The objective is to\r\ndescribe the digital city projects in Vinhedo and Pedreira. The Vinhedo project emphasized information and information\r\nsystems, while the Pedreira project stressed telecommunications based on an open access metropolitan network. The\r\nresearch methodology consisted of action-research case studies covering city hall and local municipal departments\r\nand organizations. Both projects resulted in benefits for the municipalities involved, notably modernization of municipal\r\nmanagement activities and telecommunications and improved access to public services as a result of the availability\r\nof information and increased internet use brought about by digital inclusion. The paper concludes by reiterating the\r\nimportance of collectively implemented projects when it is accepted that they are instruments that can contribute to\r\nmunicipal management, the implementation of projects for strategic digital cities, decisions taken by public managers\r\nand citizens� quality of life....
The arrival of the mobile telecommunications service industry and its rapid and widespread growth is the most\r\nsignificant developments in the fields of communication. The aim of this study is to propose a decision-making\r\nstructure to determine the appropriate Global System for Mobile Communications (GSM) operator. There are varieties\r\nof driving factors involved in choosing the most suitable GSM�s operator, and all these factors have positive and\r\nnegative interactions with each other; in this regard, we apply an appropriate multi-criteria decision- making method.\r\nDue to the interdependency between these criteria, we use Analytic Network Process (ANP) that generalizes Analytic\r\nHierarchical Process (AHP) by considering the interdependencies among factors. The results of this method illustrate\r\nthat customer satisfaction and word of Mouth are the most important factors in selecting GSM�s operators in Iran. The\r\nproposed structure provides valuable insight into the process of GSM�s operator selection for GSM managers and\r\npractitioners. It can be applied as a practical assessment tool providing an evaluation of GSM operator�s market share\r\nand identifies areas of weakness that negatively affect success in market share....
A typical speech recognition system is push button operated (Push-to-talk), which requires hand movement\r\nand hence mixed multi-modal interface. However, for disabled patients and those who use hands-busy applications\r\n(e.g., where the user has objects to manipulate or device to control while asking for assistance from another device)\r\nmovement may be restricted or impossible. One alternative is to use Speech Only Interface. The method that is\r\nbeing proposed is called Wake-Up-Word Speech Recognition (WUW-SR). A WUW-SR system would allow the user\r\nto operate (activate) many systems (Cell phone, Computer, Elevator, etc.) with speech commands instead of hand\r\nmovements. This paper introduces a new front-end paradigm of the Wake-Up-Word Speech Recognition. The state of\r\nthe art WUW-SR system is based on three different sets of features: (1) Mel-frequency Cepstral Coefficients (MFCC),\r\n(2) Linear Predictive Coding Coefficients (LPC), and (3) Enhanced Mel-frequency Cepstral Coefficients (ENH_MFCC),\r\nthese features are decoded with corresponding Hidden Markov Models (HMMs) in the back-end stage of the WUWSR.\r\nWe present an experimental FPGA design and implementation of a novel architecture of a real time feature\r\nextraction processor that generates MFCC, LPC, and ENH_MFCC features simultaneously. In the WUW-SR system,\r\nthe recognizer front-end is located at the terminal which is typically connected over a data network to remote back-end\r\nrecognition (e.g., server). The three sets of feature extraction of speech (MFCC, LPC, and ENH-MFCC) are performed\r\nat the front-end. These extracted features are then compressed and transmitted to the server via a dedicated channel,\r\nwhere subsequently they are decoded. Our front-end can be added to any hand-held electronic device compatible\r\nwith WUW-SR and command (activate) it by using our voice only (no push to talk as is presently done). Our front-end\r\nis designed, simulated and implemented in Altera DSP development kit with Cyclone III FPGA as a portable system\r\nacting as a processor that is capable of computing three different sets of features at a much faster rate than software.\r\nIt is cost effective, consumes very little power, and it is not limited by having to operate on a general-purpose computer\r\nso it can be used on any portable device....
Customer churn is a focal concern for most of the services based companies which have fixed operating costs.\r\nAmong various industries which suffer from this issue, telecommunications industry can be considered at the top of the list.\r\nIn order to counter this problem one must recognize the churners before they churn. This work develops an effective and\r\nefficient model which has the ability to predict the future churners for broadband internet services. For this purpose Genetic\r\nProgramming (GP) is employed to evolve a suitable classifier by using the customer based features. Genetic Programming\r\n(GP) is population based heuristic used to solve complex multimodal optimization problems. It is an evolutionary approach\r\nuse the Darwinian principle of natural selection (survival of the fittest) analogs with various naturally occurring operations,\r\nincluding crossover (sexual recombination), mutation (to randomly perturbed or change the respective gene value) and gene\r\nduplication. The intelligence induced in the system not only generalizes the model for a variety of real world applications but\r\nalso make it adaptable for dynamic environment. Comprehensive experimentations are performed in order to validate the\r\neffectiveness and robustness of the proposed system. It is clear from the experimental results that the proposed system\r\noutperforms other state of the art churn prediction techniques....
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