Scientific Research Publishing

Displaying 1-40 of 428 results

  • White Papers // Jun 2015

    Microcontroller Based Home Security System with GSM Technology

    In this paper, design and implement of a microcontroller based home security system with GSM technology have been presented and analyzed. Two microcontrollers with other peripheral devices which include Light Emitting Diode (LED), Liquid Crystal Display (LCD), buzzer and Global System for Mobile communication (GSM) module are responsible for reliable...

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  • White Papers // May 2015

    A Subthreshold Low-Voltage Low-Phase-Noise CMOS LC-VCO with Resistive Biasing

    In this paper, the authors present a low-phase-noise LC Voltage-Controlled Oscillator (LC-VCO) with top resistive biasing in subthreshold region. The subthreshold LC-VCO has low-power and low-phase-noise due to its high trans-conductance efficiency and low gate bias condition. The top resistive biasing has more benefit with the feature of phase noise...

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  • White Papers // May 2015

    Reliability of High Speed Ultra Low Voltage Differential CMOS Logic

    In this paper, the authors present a solution to the ultra-low voltage inverter by adding a keeper transistor in order to make the semi-floating-gate more stable and to reduce the current dissipation. Moreover, they also present a differential ULV inverter and elaborate on the reliability and fault tolerance of the...

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  • White Papers // May 2015

    Accurate Extraction of Effective Gate Resistance in RF MOSFET

    In this paper, the authors describe the gate electrode resistance of MOSFET and Non-Quasi-Static (NQS) effect for RF operation. The vertical current paths between the silicide layer and poly-silicon are considered in the gate electrode. The vertical current paths are not effective in long-channel devices, but become more significant in...

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  • White Papers // May 2015

    Realization of a New Current Mode Second-Order Biquad Using Two Current Follower Transconductance Amplifiers (CFTAs)

    Current mode circuits are very popular due to some of their advantages over their voltage mode counter parts. A new circuit for realization of universal current-mode filter using Current Follower Trans-conductance Amplifiers (CFTAs) is presented. The proposed circuit realizes current-mode low pass, high pass and band pass filter functions simultaneously...

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  • White Papers // May 2015

    Predictive Prefetching for Parallel Hybrid Storage Systems

    In this paper, the authors present a predictive prefetching mechanism that is based on probability graph approach to perform prefetching between different levels in a parallel hybrid storage system. The fundamental concept of their approach is to invoke parallel hybrid storage system's parallelism and pre-fetch data among multiple storage levels...

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  • White Papers // May 2015

    Hybrid Data Mining Models for Predicting Customer Churn

    The term "Customer churn" is used in the industry of Information and Communication Technology (ICT) to indicate those customers who are about to leave for a new competitor or end their subscription. Predicting this behavior is very important for real-life market and competition and it is essential to manage it....

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  • White Papers // May 2015

    Non-Intrusive Context Aware Transactional Framework to Derive Business Insights on Big Data

    To convert invisible, unstructured and time-sensitive machine data into information for decision making is a challenge. Tools available today handle only structured data. All the transaction data are getting captured without understanding its future relevance and usage. It leads to other big data analytics related issue in storing, archiving and...

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  • White Papers // Apr 2015

    Service Cooperation Incentive Mechanism in a Dual-Channel Supply Chain Under Service Differentiation

    The co-principal anent models of manufacturer and retailer are built under the complete information and asymmetric information. In addition, the optimal profit sharing and the optimal fixed payment ratio are analyzed and compared in both situations. A motivate mechanism about service effort provided by the manufacturer towards the retailer in...

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  • White Papers // Apr 2015

    Research of Big Data Based on the Views of Technology and Application

    In the era of big data, large amounts of data affect the authors' work, life and study, even national economic development. It provides a new way of thinking and approaches to analyze and solve problems, which gradually becomes a hot research. Based on describing the concept and characteristics of big...

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  • White Papers // Apr 2015

    A Novel High-Performance Lekage-Tolerant, Wide Fan-In Domino Logic Circuit in Deep-Submicron Technology

    As technology shrinks in modern era the demand on high speed, low power consumption and small chip area in microprocessors is come into existence. In this paper, the authors have presented a new class of domino circuit design for low power consumption, faster circuit speed and high performance. Due to...

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  • White Papers // Apr 2015

    Ensuring Security, Confidentiality and Fine-Grained Data Access Control of Cloud Data Storage Implementation Environment

    With the development of cloud computing, the mutual understandability among distributed data access control has become an important issue in the security field of cloud computing. To ensure security, confidentiality and fine-grained data access control of Cloud Data Storage (CDS) environment, the authors proposed Multi-Agent System (MAS) architecture. This architecture...

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  • White Papers // Apr 2015

    The IRIS Development Platform and Proposed Object-Oriented Data Base

    Various code development platforms, such as the ATHENA framework of the ATLAS experiment encounter lengthy compilation/linking times. To augment this situation, the IRIS development platform was built as a software development framework acting as compiler, cross-project linker and data fetcher, which allow hot-swaps in order to compare various versions of...

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  • White Papers // Apr 2015

    Varying Response Ratio Priority: A Preemptive CPU Scheduling Algorithm (VRRP)

    In present era, one of the most important resources of computer machine is CPU. With the increasing number of application, there exist a large number of processes in the computer system at the same time. Many processes in system simultaneously raise a challenging circumstance of managing the CPU in such...

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  • White Papers // Apr 2015

    A Data-Placement Strategy Based on Genetic Algorithm in Cloud Computing

    With the development of computerized business application, the amount of data is increasing exponentially. Cloud computing provides high performance computing resources and mass storage resources for massive data processing. In distributed cloud computing systems, data intensive computing can lead to data scheduling between data centers. Reasonable data placement can reduce...

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  • White Papers // Mar 2015

    Design of a New Serializer and Deserializer Architecture for On-Chip SerDes Transceivers

    The increasing trends in SoCs and SiPs technologies demand integration of large numbers of buses and metal tracks for interconnections. On-chip SerDes transceiver is a promising solution which can reduce the number of interconnects and offers remarkable benefits in context with power consumption, area congestion and crosstalk. This paper reports...

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  • White Papers // Mar 2015

    Design of Ultra-Low Power PMOS and NMOS for Nano Scale VLSI Circuits

    CMOS devices play a major role in most of the digital design, since CMOS devices have larger density and consume less power. The integrated circuit performance mostly depends on the basic devices and its scaling methods, but in conventional CMOS devices in ultra-deep submicron technology, leakage power becomes the major...

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  • White Papers // Mar 2015

    The Discussion of Theory Review and Practice on Enterprise Executives Incentive

    Now-a-days, science and technology are rapidly progressing, economy continually developing, society constantly progressing and competition is increasingly fierce. Under the whole back of the limitation and determination of the natural resource, all of the competition will own to talent competition. Trying to analysis on the main basis of the tenant...

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  • White Papers // Mar 2015

    Human Resource Management in the Era of Big Data

    In the era of big data, enterprise management is undergoing tremendous changes. Human resource department, as an important part of the company, has also been affected by big data. The paper is in the context of the era of big data, discussing the application of big data in major modules...

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  • White Papers // Mar 2015

    Job Rotation: An Effective Tool to Transfer the Tacit Knowledge within an Enterprise

    There are a variety of ways to transfer the tacit knowledge within an enterprise and job rotation is one of the effective tools. This paper reveals the three-stage process enterprises transferring the tacit knowledge by implementing job rotation and analyses the efficiency of tacit knowledge transferring among individuals in different...

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  • White Papers // Mar 2015

    M/G/1 Vacation Queueing Systems with Server Timeout

    In this paper, the authors consider a single-server vacation queueing system that operates in the following manner. When the server returns from a vacation, it observes the following rule. If there is at least one customer in the system, the server commences service and serves exhaustively before taking another vacation....

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  • White Papers // Mar 2015

    Analysis of O2O Model's Development Problems and Trend

    Future competition not only exists in the products and channels, but also exists in the resource integration and terminal consumers. O2O mode is new commerce model which does a deeper explore to the sales channels, and has a very good prospect. But, there are certain obstacles in its development. This...

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  • White Papers // Mar 2015

    Inferring Locations of Mobile Devices from Wi-Fi Data

    Mobile phones are becoming a primary platform for information access. A major aspect of ubiquitous computing is context-aware applications which collect information about the environment that the user is in and use this information to provide better service and improve user experience. Location awareness makes certain applications possible, e.g., recommending...

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  • White Papers // Mar 2015

    The Performance of Knowledge Workers Based on Behavioral Perspective

    After entering the knowledge economy era, competition and development of enterprises rely more on the use and transfer of knowledge and information. As the carrier of knowledge, knowledge workers are becoming more and more important. In this paper, based on the perspective of behavior performance, the author has analyzed the...

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  • White Papers // Mar 2015

    Comparative Analysis of Operating System of Different Smart Phones

    Now-a-days, rapidly increasing technology is mobile phone technology in telecommunication sector. This mobile device technology has great effect on everyone's life. This technology has reduced the burden of people in their daily life. To manage the rising demand for such mobile devices, numerous operating systems came in the market as...

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  • White Papers // Mar 2015

    Electricity Logistics Storage Integration System Research

    With the booming of e-commerce business and high requirement of customer, the operation mode of e-commerce distribution center is changing. Automation equipment cannot be utilized fully due to the nature fact of electricity business, which can be described as small batch and high frequency. In this paper, the authors put...

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  • White Papers // Feb 2015

    Design and Implementation of Low-Pass, High-Pass and Band-Pass Finite Impulse Response (FIR) Filters Using FPGA

    In this paper, the authors present the design and implementation of a low-pass, high-pass and a hand-pass Finite Impulse Response (FIR) Filter using Spartan-6 Field Programmable Gate Array (FPGA) device. The filter performance is tested using Filter Design and Analysis (FDA) and FIR tools from math works. The FDA tool...

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  • White Papers // Feb 2015

    A MATLAB-Based Numerical and GUI Implementation of Cross-Gradients Joint Inversion of Gravity and Magnetic Data

    "The cross-gradients joint inversion technique has been applied to multiple geophysical data with a significant improvement on compatibility, but its numerical implementation for practical use is rarely discussed in the literature. The authors present a MATLAB-based three-dimensional cross-gradients joint inversion program with application to gravity and magnetic data. The input...

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  • White Papers // Feb 2015

    Formalization of Federated Schema Architectural Style Variability

    "Data integration requires managing heterogeneous schema information. A federated database system integrates heterogeneous, autonomous database systems on the schema level, whereby both local applications and global applications accessing multiple component database systems are supported. Such a federated database system is a complex system of systems which requires a well-designed organization...

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  • White Papers // Feb 2015

    Semantic Enrichment of XML Schema to Transform Association Relationships in ODL Schema

    "In this paper, the authors present an approach for transforming an XML schema they enriched in ODL (Object Definition Language) schemas. It is possible to realize the concepts of ODL in a model of XML schema; they propose to introduce an enrichment concretizing these concepts in the XML schema models....

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  • White Papers // Feb 2015

    Content-Based Image Retrieval Using SOM and DWT

    "Content-Based Image Retrieval (CBIR) from a large database is becoming a necessity for many applications such as medical imaging, Geographic Information Systems (GIS), space search and many others. However, the process of retrieving relevant images is usually preceded by extracting some discriminating features that can best describe the database images....

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  • White Papers // Feb 2015

    Timed-Automata Based Model-Checking of a Multi-Agent System: A Case Study

    "A multi-agent based transport system is modeled by timed automata model extended with clock variables. The correctness properties of safety and liveness of this model are verified by timed automata based UPPAAL. Agents have a degree of control on their own actions, have their own threads of control, and under...

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  • White Papers // Feb 2015

    Towards Designing an Intelligent Educational Assessment Tool

    "Assessment is an important part of learning process. It can be defined as the process of gathering information for the purpose of making judgments about a current state of affairs presumably for the purpose of enhancing future outcomes. It determines whether or not the goals of education are being met....

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  • White Papers // Feb 2015

    PPP Accuracy Enhancement Using GPS/GLONASS Observations in Kinematic Mode

    Commonly, kinematic PPP techniques employ un-differenced ionosphere free linear combination of GPS observations. This, however, may not provide continuous solution in urban areas as a result of limited satellite visibility. In this paper, the traditional un-differenced as well as Between-Satellite Single-Difference (BSSD) ionosphere-free linear combinations of GPS and GLONASS measurements...

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  • White Papers // Jan 2015

    E-Learning Optimization Using Supervised Artificial Neural-Network

    "Improving learning outcome has always been an important motivating factor in educational inquiry. In a blended learning environment where e-learning and traditional face to face class tutoring are combined, there are opportunities to explore the role of technology in improving student's grades. A student's performance is impacted by many factors...

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  • White Papers // Jan 2015

    How Framing Effect Impact on Decision Making on Internet Shopping

    Framing effect is an understanding and assessment that individual implements different behaviors when facing to the multiple choice that expressing the same meaning. Previously, scholars went through numerous empirical studies regarding impact of the method as well as environment in making decision of online purchasing. Also, scholars have proved that...

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  • White Papers // Jan 2015

    The Impact of Brand Image on Consumer Behavior: A Literature Review

    The concept "Brand image" has drawn significant attention from academics and practitioners since it was put forward, because it played an important role in marketing activities. Although, brand image was recognized as the driving force of brand asset and brand performance, few studies have elaborated on the relationship between brand...

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  • White Papers // Jan 2015

    An Experiment in Use of Brain Computer Interfaces for Cognitive Researches

    Human error can be defined as some undesired behaviors caused by some improprieties such as lack of knowledge, lack of communication, lack of attention, excessive stress, mental fatigue and environmental factors. Monitoring cognitive state is a useful tool to reduce these errors. Therefore, many studies about cognitive load have been...

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  • White Papers // Jan 2015

    The Construction of Human Resource Management Cloud Service Platform

    "Human resource management service faced the challenges of promoting efficiency, costs saving, quick responding and so on. In order to face these challenges, this paper puts forward a ""6 1"" structure of human resource management service combined with some characteristics of cloud computing, elaborates the service mode of the cloud...

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  • White Papers // Jan 2015

    Cell-Phone Recycling by Solvolysis for Recovery of Metals

    Mobile phones represent a significant and growing problem with respect to Electrical Waste and Electronic Equipment (EWEE). Nevertheless, they are perhaps one of the most valuable electronic products, since they are an important resource for the recovery of metals in terms of mass and volume. In paper, research a chemical...

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  • White Papers // Nov 2009

    A Comparative Study of Medium Access Control Protocols for Wireless Sensor Networks

    One of the major constraints in Wireless Sensor Networks (WSNs) is power consumption. In recent years, a lot of efforts have been put into the design of Medium Access Control (MAC) protocols for WSN, in order to reduce energy consumption and enhance the network's lifetime. This paper surveyed some MAC...

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  • White Papers // Aug 2010

    A Survey on Context-Aware Sensing for Body Sensor Networks

    Context awareness in Body Sensor Networks (BSNs) has the significance of associating physiological user activity and the environment to the sensed signals of the user. The context information derived from a BSN can be used in pervasive healthcare monitoring for relating importance to events and specifically for accurate episode detection....

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  • White Papers // Mar 2012

    An Integrative Comparison of Energy Efficient Routing Protocols in Wireless Sensor Network

    Many advances have been made in sensor technologies which are as varied as the applications; and many more are in progress. It has been reasonable to design and develop small size sensor nodes of low cost and low power. In this paper, the authors have explored some energy-efficient routing protocols...

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  • White Papers // Mar 2011

    A Comment on Link Dynamics and Protocol Design in a Multi-Hop Mobile Environment

    This paper is a supplementary document for "Link Dynamics and Protocol Design in a Multi-Hop Mobile Environment", which presents an analytic model to obtain link lifetime in mobile wireless networks. The model outcome is used as groundwork for several mobility-related evaluations. Here, it is discussed how an improper assumption in...

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  • White Papers // Apr 2011

    A Practical Solution for Location Estimation in Manually Deployed Wireless Sensor Networks

    This paper addresses the existing research and adds another aspect of functionality by incorporating pertinent sensor nodes to provide a dynamic location discovery and estimation. The software used provides an easy graphical user interface to visualize a particular location in accordance with geographical latitude and longitude. A simple real time...

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  • White Papers // Apr 2011

    Classification of Object Tracking Techniques in Wireless Sensor Networks

    Object tracking is one of the killer applications for Wireless Sensor Networks (WSN) in which the network of wireless sensors is assigned the task of tracking a particular object. The network employs the object tracking techniques to continuously report the position of the object in terms of Cartesian coordinates to...

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  • White Papers // Apr 2011

    A Direct Trust Dependent Link State Routing Protocol Using Route Trusts for WSNs (DTLSRP)

    The traditional cryptographic security techniques are not sufficient for secure routing of message from source to destination in Wireless Sensor Networks (WSNs), because it requires sophisticated software, hardware, large memory, high processing speed and communication bandwidth. It is not economic and feasible because, depending on the application, WSN nodes are...

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  • White Papers // Apr 2011

    Ambient Intelligence: Awareness Context Application in Industrial Storage

    WSNs are designed to efficiently collect data and monitor environments, among other applications. This paper describes the concept and realization of an Active Security System for security management of warehousing of chemical substances using WSNs. The authors present an approach to modeling and simulating cooperation between intelligent products that are...

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  • White Papers // May 2011

    In-Motes EYE: A Real Time Application for Automobiles in Wireless Sensor Networks

    Wireless sensor networks have been identified as one of the key technologies for the 21st century. In order to overcome their limitations such as fault tolerance and conservation of energy, the authors propose a middleware solution, In-Motes. In-Motes stands as a fault tolerant platform for deploying and monitoring applications in...

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  • White Papers // May 2011

    Implementation Study of a Centralized Routing Protocol for Data Acquisition in Wireless Sensor Networks

    Wireless Sensor Networks (WSNs) attract considerable amount of research efforts from both industry and academia. With limited power and computational capability available on a sensor node, robustness and efficiency are major concerns when designing a routing protocol for WSNs with low complexity. There are various existing design approaches, such as...

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  • White Papers // Mar 2011

    A Fault-Tolerant Cooperative Spectrum Sensing Algorithm Over Cognitive Radio Network Based on Wireless Sensor Network

    A serious threat to cognitive radio networks that sense the spectrum in a cooperative manner is the transmission of false spectrum sensing data by malicious sensor nodes. SNR fluctuations due to wireless channel effects complicate handling such attackers even further. This enforces the system to acquire authentication. Actually, the decision...

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  • White Papers // Mar 2011

    Performance Evaluation of Routing Protocols on the Reference Region Group Mobility Model for MANET

    Group mobility is prevalent in many Mobile Ad hoc NETwork (MANET) applications, such as disaster recovery, military operations, searching and rescue activities. Group partition, as an inherent phenomenon in group mobility, may occur when mobile nodes move in diverse mobility patterns and it causes the network to be partitioned into...

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  • White Papers // Mar 2011

    Energy-Efficient and Reliable Transport Protocols for Wireless Sensor Networks: State-of-Art

    New wireless sensor network applications (e.g., military surveillance) require higher reliability than a simple best effort service could provide. Classical reliable transport protocols like Transmission Control Protocol (TCP) are not well suited for wireless sensor networks due to both the characteristics of the network nodes (low computing power, strong energy...

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  • White Papers // Sep 2009

    Bandwidth Optimization in 802.15.4 Networks Through Evolutionary Slot Assignment

    Traditional Wireless Sensor Networks (WSNs) based on carrier sense methods for channel access suffer from reduced bandwidth utilization, increase energy consumptions and latency problems in networks with high traffic. In this paper, a novel Evolutionary Slot Assignment (ESA) algorithm has been developed to increase the throughput of large wireless mesh...

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  • White Papers // Sep 2009

    Positioning a Node of Wireless Sensor Networks in 3 Dimensional Space

    To know the location of nodes is very important and valuable for Wireless Sensor Networks (WSN), the authors present an improved positioning model (3D-PMWSN) to locate the nodes in WSN. In this model, grid in space is presented. When one tag is detected by a certain reader whose position is...

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  • White Papers // Oct 2009

    An Adaptive Data Aggregation Algorithm in Wireless Sensor Network With Bursty Source

    The Wireless Sensor network is distributed event based systems that differ from conventional communication network. Sensor network has severe energy constraints, redundant low data rate, and many-to-one flows. Aggregation is a technique to avoid redundant information to save energy and other resources. There are two types of aggregations. In one...

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  • White Papers // Nov 2009

    Evaluation of Network Stack Optimization Techniques for Wireless Sensor Networks

    The authors present a network stack implementation for a wireless sensor platform based on a byte-level radio. The network stack provides error-correction code, multi-channel capability and reliable communication for a high packet reception rate as well as a basic packet-level communication interface. In outdoor tests, the packet reception rate is...

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  • White Papers // Nov 2009

    Modified Ceiling Bounce Model for Computing Path Loss and Delay Spread in Indoor Optical Wireless Systems

    This paper proposes modifications to the tradional Ceiling Bounce Model and uses it to characterize diffuse indoor optical wireless channel by analyzing the effect of transceiver position on signal propagation properties. The modified approach uses a combination of the tradional ceiling bounce method and a statistical approach. The effects of...

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  • White Papers // Nov 2009

    Real-Time Automatic ECG Diagnosis Method Dedicated to Pervasive Cardiac Care

    Recent developments of the wireless sensor network will revolutionize the way of remote monitoring in different domains such as smart home and smart care, particularly remote cardiac care. Thus, it is challenging to propose an energy efficient technique for Automatic ECG Diagnosis (AED) to be embedded into the wireless sensor....

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  • White Papers // Nov 2009

    AEESPAN: Automata Based Energy Efficient Spanning Tree for Data Aggregation in Wireless Sensor Networks

    In Wireless Sensor Networks (WSNs), sensor nodes are developed densely. They have limit processing capability and low power resources. Thus, energy is one of most important constraints in these networks. In some applications of sensor networks, sensor nodes sense data from the environment periodically and transmit these data to sink...

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  • White Papers // Nov 2009

    Distributed Video Coding Using LDPC Codes for Wireless Video

    Popular video coding standards like H.264 and MPEG working on the principle of motion-compensated predictive coding demand much of the computational resources at the encoder increasing its complexity. Such bulky encoders are not suitable for applications like wireless low power surveillance, multimedia sensor networks, wireless PC cameras, mobile camera phones...

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  • White Papers // Nov 2009

    Dynamic Hierarchical Communication Paradigm for Wireless Sensor Networks: A Centralized, Energy Efficient Approach

    A Wireless Sensor Network (WSN) consists of a large number of randomly deployed sensor nodes. These sensor nodes organize themselves into a cooperative network and perform the three basic functions of sensing, computations and communications. Research in WSNs has become an extensive explorative area during the last few years, especially...

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  • White Papers // Nov 2009

    Minimization of Collision in Energy Constrained Wireless Sensor Network

    Wireless Sensor Networks (WSNs) are one of the fastest growing and emerging technologies in the field of Wireless Networking today. The applications of WSNs are extensively spread over areas like Military, Environment, Health Care, Communication and many more. These networks are powered by batteries and hence energy optimization is a...

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  • White Papers // Nov 2009

    An Energy-Efficient MAC Protocol for WSNs: Game-Theoretic Constraint Optimization With Multiple Objectives

    In WSNs, energy conservation is the primary goal, while throughput and delay are less important. This results in a tradeoff between performance (e.g., throughput, delay, jitter, and packet-loss-rate) and energy consumption. In this paper, the problem of energy-efficient MAC protocols in WSNs is modeled as a game-theoretic constraint optimization with...

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  • White Papers // Jul 2011

    An Exploratory Study of Experimental Tools for Wireless Sensor Networks

    The objective of this contribution is to present expositive review content on currently available experimental tools/services/concepts used for most emerging field Wireless Sensor Network that has capability to change many of the Information Communication aspects in the upcoming era. Currently due to high cost of large number of sensor nodes...

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  • White Papers // Nov 2009

    A Novel Topology for the Zonal Network With Wireless Coverage

    In this paper, the authors propose a banyan-tree topology for the wireless coverage along the road or railway, which is characterized as a zonal network. Theoretical analysis and numerical studies show that the proposed banyan-tree topology is appropriate for the zonal network with the Wireless Mesh Network (WMN) technology, which...

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  • White Papers // Nov 2009

    A Multipath Routing Algorithm Based on Traffic Prediction in Wireless Mesh Networks

    The technology of QoS routing has become a great challenge in Wireless Mesh Networks (WMNs). There exist a lot of literatures on QoS routing in WMNs, but the current algorithms have some deficiencies, such as high complexity, poor scalability and flexibility. To solve the problems above, a Multipath Routing Algorithm...

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  • White Papers // Nov 2009

    Mobile Positioning System Based on the Wireless Sensor Network in Buildings

    Established on the Intel Multi-Core Embedded platform, using 802.11 Wireless Network protocols as the communication medium, combining with Radio Frequency-Communication and Ultrasonic Ranging, implement a mobile terminal system in an intellectualized building. It can provide its holder such functions: accurate positioning, intelligent navigation, video monitoring, and wireless communication. The innovative...

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  • White Papers // Dec 2009

    Target Tracking With QoS Support in Large Wireless Sensor Networks

    Quality of Service (QoS) is important in the application of target tracking in Wireless Sensor Networks (WSNs). When a target appears, it will trigger an event from one or more sensors. A target can only be accurately detected if a certain number of event packets are received by the sink...

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  • White Papers // Dec 2009

    A Mobile-Agent-Based Adaptive Data Fusion Algorithm for Multiple Signal Ensembles in Wireless Sensor Networks

    Distributed Compressed Sensing (DCS) is an emerging field that exploits both intra- and inter-signal correlation structures and enables new distributed coding algorithms for multiple signal ensembles in wireless sensor networks. The DCS theory rests on the joint sparsity of a multi-signal ensemble. In this paper, the authors propose a new...

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  • White Papers // Dec 2009

    EasiSim: A Scalable Simulator for Wireless Sensor Networks

    Traditional simulators have deficiencies of scalability, thus they are not so efficient in running simulations with large-scale networks. In this paper, the authors present a new simulator, namely EasiSim, specifically for evaluating sensor networks on a large scale. EasiSim is featured by organizing its core components, including nodes, topology and...

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  • White Papers // Dec 2009

    Dynamic Load Balancing With Overlay-Based Reconfiguration for Wireless Sensor Networks

    Wireless sensor networks are characterized by multihop wireless links and resource constrained nodes. In terms of data collection and forwarding scheduling, this paper investigates the load balancing in sensor nodes and wireless link based on the performance of wireless sensor networks. Leveraging the property of dissimilarity distribution, a method to...

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  • White Papers // Sep 2011

    ANCAEE: A Novel Clustering Algorithm for Energy Efficiency in Wireless Sensor Networks

    One of the major constraints of wireless sensor networks is limited energy available to sensor nodes because of the small size of the batteries they use as source of power. Clustering is one of the routing techniques that have been using to minimize sensor nodes' energy consumption during operation. In...

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  • White Papers // Sep 2011

    Wireless Power Generation Strategy Using EAP Actuated Energy Harvester for Marine Information Acquisition

    The energy of a radio wave is reduced through the dispersion, the refraction and the absorption because the medium transferring the vibration of a radio wave is the seawater. In the end the reduced energy of a radio wave causes the reduced transmitting length for communication, the long postponed communication...

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  • White Papers // Sep 2011

    Wireless Sensor Network for Monitoring Maturity Stage of Fruit

    In this paper, the authors present a wireless sensor network for monitoring the maturity stage of fruit. A dual-polarization coupled patch sensor, which is robust to environmental changes, was designed to operate at 2.45 GHz. It was attached to a Durian fruit for a period of days to measure the...

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  • White Papers // Sep 2011

    An Energy-Based Stochastic Model for Wireless Sensor Networks

    The authors propose an energy-based stochastic model of Wireless Sensor Networks (WSNs) where each sensor node is randomly and alternatively in an active and a sleep mode. They first investigate the sensor model and derive the formula of the steady-state probability when there are a number of data packets in...

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  • White Papers // Feb 2011

    Network-Wide Time Synchronization in Multi-Channel Wireless Sensor Networks

    Recent advances in wireless sensor technology have enabled simultaneous exploitation of multiple channels in wireless sensor systems. In this paper, a novel time synchronization algorithm is proposed for multichannel Wireless Sensor Networks (WSNs) called Multi-Channel Time Synchronization (MCTS) protocol. Time synchronization is critical for many WSN applications and enables efficient...

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  • White Papers // Feb 2011

    A New MAC Protocol for Moving Target in Distributed Wireless Sensor Networks

    A Wireless Sensor Network (WSN) is composed of many nodes with limited power supply; most nodes are stationary in the network which could probably involve a few mobile nodes. Various Medium Access Control (MAC) protocols specially aimed at a target locating application for WSNs have been proposed. However, most of...

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  • White Papers // Feb 2011

    Compressing Information of Target Tracking in Wireless Sensor Networks

    Target tracking is a well studied topic in wireless sensor networks. It is a procedure that nodes in the network collaborate in detecting targets and transmitting their information to the base-station continuously, which leads to data implosion and redundancy. To reduce traffic load of the network, a data compressing based...

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  • White Papers // Jul 2010

    Passive Loss Inference in Wireless Sensor Networks Using EM Algorithm

    Wireless Sensor Networks (WSNs) are mainly deployed for data acquisition, thus, the network performance can be passively measured by exploiting whether application data from various sensor nodes reach the sink. In this paper, therefore, the authors take into account the unique data aggregation communication paradigm of WSNs and model the...

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