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Rensselaer Polytechnic Institute
(121 results)-
White Papers
A Note on Statistically Detecting Tampered Type Attacks
April 8, 2008, 12:00am PDT
Information integrity of communication data is crucial to e-business systems. An adversary may delete or insert packets into a normal communication data series in e-business systems to destroy...
Provided by Rensselaer Polytechnic Institute
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White Papers
A Principle of a Data Synthesizer for Performance Test of Anti-DDOS Flood Attacks
March 17, 2008, 12:00am PDT
Distributed Denial-Of-Service (DDOS) flood attacks remain a big issue in network security. Real events of DDOS flood attacks show that an attacked site (e.g., server) usually may not be...
Provided by Rensselaer Polytechnic Institute
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White Papers
Optimal Communication Coverage for Free-Space-Optical MANET Building Blocks
September 21, 2005, 12:00am PDT
Existence of Line of Sight (LOS) and alignment between the communicating antennas is one of the key requirements for Free-Space-Optical (FSO) communication. To ensure uninterrupted data flow,...
Provided by Rensselaer Polytechnic Institute
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White Papers
Multi-Element Array Antennas for Free-Space Optical Communication
January 1, 2010, 12:00am PST
This paper examines the feasibility of using 2-dimensional multiple element array antennas for free-space optical communications. Spatial diversity due to multiple antennas on 2-d arrays can...
Provided by Rensselaer Polytechnic Institute
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White Papers
CAVES: A Configurable Application View Storage System
January 1, 2010, 12:00am PST
Storage management is a well-known method for improving the efficiency of data intensive and networked applications. Today's data management systems handle many non-traditional data formats,...
Provided by Rensselaer Polytechnic Institute
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White Papers
Price of Stability in Survivable Network Design
July 21, 2009, 12:00am PDT
This paper studies the survivable version of the game theoretic network formation model known as the Connection Game, originally introduced in. In this model, players attempt to connect to a...
Provided by Rensselaer Polytechnic Institute
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White Papers
Instance Data Evaluation for Semantic Web-Based Knowledge Management Systems
September 15, 2008, 12:00am PDT
As semantic web technologies are increasingly used to empower Knowledge Management Systems (KMSs), there is a growing need for mechanisms and automated tools for checking content generated by...
Provided by Rensselaer Polytechnic Institute
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White Papers
The Internet Operating System: Middleware for Adaptive Distributed Computing
June 1, 2007, 12:00am PDT
Large-scale, dynamic, and heterogeneous networks of computational resources (a.k.a. Grids) promise to provide high performance and scalability to computationally intensive applications. To fulfill...
Provided by Rensselaer Polytechnic Institute
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White Papers
LOGML - XML Language for Web Usage Mining
January 1, 2010, 12:00am PST
This paper proposes a new XML language, LOGML. LOGML is a web-log report description language. This paper generates web-log reports in LOGML format for a web site from web log files and the web...
Provided by Rensselaer Polytechnic Institute
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White Papers
UML-Based Alias Control
September 11, 2006, 12:00am PDT
This paper proposes a mechanism for alias control which is based on the Unified Modeling Language (UML). Specifically, this paper proposes use of ownership and immutability constraints on UML...
Provided by Rensselaer Polytechnic Institute
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White Papers
Optimal Policies for Distributed Data Aggregation in Wireless Sensor Networks
December 3, 2006, 12:00am PST
The authors consider the scenario of distributed data aggregation in wireless sensor networks, where each sensor can obtain and estimate the information of the whole sensing field through local...
Provided by Rensselaer Polytechnic Institute
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White Papers
Power Optimal Connectivity and Coverage in Wireless Sensor Networks
January 1, 2010, 12:00am PST
This work considers a sensor network which is comprised of a large number of sensor nodes communicating with RF links. The authors assume that sensor nodes are deployed in an ad-hoc fashion so as...
Provided by Rensselaer Polytechnic Institute
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White Papers
Optimally Increasing Secure Connectivity in Multi-Hop Wireless Ad Hoc Networks
August 6, 2010, 12:00am PDT
This paper considers the problem of how to maximize secure connectivity of multi-hop wireless ad hoc networks after deployment. Two approaches, based on graph augmentation problems with nonlinear...
Provided by Rensselaer Polytechnic Institute
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White Papers
Agent-Based Simulation Of Electricity Markets: A Survey Of Tools
June 17, 2009, 12:00am PDT
Agent-based simulation has been a popular technique in modeling and analyzing electricity markets in recent years. The main objective of this paper is to study existing agent-based simulation...
Provided by Rensselaer Polytechnic Institute
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White Papers
China's Changing Energy Intensity Trend: A Decomposition Analysis
December 1, 2006, 12:00am PST
China experienced a dramatic decline in energy intensity from the onset of economic reform in the late 1970s until 2000, but since then rate of decline slowed and energy intensity actually...
Provided by Rensselaer Polytechnic Institute
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White Papers
Behavioral Economics And Climate Change Policy
January 1, 2007, 12:00am PST
The policy recommendations of most economists are based, explicitly or implicitly, on the rational actor model of human behavior. The related fields of behavioral economics, game theory, and...
Provided by Rensselaer Polytechnic Institute
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White Papers
Mathematical Models In Input-Output Economics
April 1, 2007, 12:00am PDT
This paper describes the mathematical basis for input-output economics, the major types of models, and the underlying economic theory. The features of these models that make them especially well...
Provided by Rensselaer Polytechnic Institute
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White Papers
Energy And The Global Economy
May 1, 2007, 12:00am PDT
This paper describes the contribution economists can make in uncovering energy choices capable of reducing carbon emissions on a global scale. All production and consumption activities involve the...
Provided by Rensselaer Polytechnic Institute
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White Papers
Regional Development In China: Interregional Transportation Infrastructure And Regional Comparative Advantage
May 1, 2007, 12:00am PDT
Significant economic disparities among China's Eastern, Central, and Western regions pose unequivocal challenges to social equality and political stability in the country. A major impediment to...
Provided by Rensselaer Polytechnic Institute
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White Papers
Do Falling Import Prices Increase Market Demand For Domestically Produced Consumer Goods?
July 1, 2007, 12:00am PDT
Rising exchange rates can lower prices on imported consumer goods. The lower prices have two effects. A substitution effect shifts in demand from domestically produced goods to imports. An income...
Provided by Rensselaer Polytechnic Institute
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White Papers
Was Keynes Right? Does Current Year Disposable Income Drive Consumption Spending?
July 1, 2007, 12:00am PDT
In the Keynesian consumption function, current income is asserted to be the main determinant of consumption. This paper examines the extent to which the Keynesian consumption function explains...
Provided by Rensselaer Polytechnic Institute
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White Papers
Tracking Global Factor Inputs, Factor Earnings, And Emissions Associated With Consumption In A World Modeling Framework
November 1, 2007, 12:00am PDT
This paper presents a new approach for estimating the amount of carbon embodied in a product consumed in a given economy, taking account of where the inputs to that product were extracted and...
Provided by Rensselaer Polytechnic Institute
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White Papers
The Consumption Function
January 1, 2008, 12:00am PST
Keynes held that, mainly, it was current income that determined the demand for consumer goods and services. He also suggested wealth, interest rates, and taxes may have smaller effects. Little...
Provided by Rensselaer Polytechnic Institute
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White Papers
A Method For Separating Income & Substitution Effects Of Exchange Rate Changes On Aggregate Demand
February 1, 2009, 12:00am PST
Regression estimates of exchange rate total effects on aggregate demand are broken into separate income and substitution effects. Total effects estimates can seem contrary to theory. Separating...
Provided by Rensselaer Polytechnic Institute
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White Papers
Embodied Resource Flows And Product Flows: Combining The Absorbing Markov Chain With The Input-Output Model
January 1, 2010, 12:00am PST
The authors develop the Absorbing Markov Chain (AMC) for describing in detail the network of paths through an industrial system taken by an embodied resource from extraction through intermediate...
Provided by Rensselaer Polytechnic Institute
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White Papers
Mineral Resources: Stocks, Flows, And Prospects
January 1, 2010, 12:00am PST
This paper focuses on metals as they provide the clearest example of the challenges and opportunities that mineral resources present to society, in terms of both primary production and recycling....
Provided by Rensselaer Polytechnic Institute
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White Papers
Sectors May Use Multiple Technologies Simultaneously: The Rectangular Choice-Of-Technology Model With Binding Factor Constraints
October 1, 2010, 12:00am PDT
The authors develop the rectangular choice-of-technology model with factor constraints, or RCOT, for analysis of the economy of a single region, or of multiple regions in the context of a model of...
Provided by Rensselaer Polytechnic Institute
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White Papers
The Relevance Of Evolutionary Science For Economic Theory And Policy
November 1, 2010, 12:00am PDT
This white paper emphasizes the relevance of evolutionary science as a way to integrate the SBE sciences, similar to the integration that is more advanced in the biological sciences. Modern...
Provided by Rensselaer Polytechnic Institute
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White Papers
Discounting, Ethics, And Options For Maintaining Biodiversity And Ecosystem Integrity
December 1, 2010, 12:00am PST
This paper presents the economic logic behind the concept of discounting the future and discusses how it applies to biodiversity conservation. How should economists account for the effects of...
Provided by Rensselaer Polytechnic Institute
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White Papers
Behavioral Economics, Neuroeconomics, And Climate Change Policy: Baseline Review For The Garrison Institute Initiative On Climate Change Leadership
December 1, 2010, 12:00am PST
In spite of the increasing scientific certainty that the earth's climate is warming and that human activity is partially responsible, public willingness to take steps to reduce greenhouse gas...
Provided by Rensselaer Polytechnic Institute
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White Papers
Modeling and Detection of Complex Attacks
March 18, 2007, 12:00am PDT
A complex attack is a sequence of temporally and spatially separated legal and illegal actions each of which can be detected by various IDS but as a whole they constitute a powerful attack. IDS...
Provided by Rensselaer Polytechnic Institute
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White Papers
Unifying Unified Voice Messaging
September 18, 2006, 12:00am PDT
Roughly 18 months after installing a unified voice messaging system, the authors picked it up and merged it into the pre-existing production email domain. This paper deals with both technical...
Provided by Rensselaer Polytechnic Institute
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White Papers
Comparison of Object-Oriented and Functional Programming for Code Generation
April 21, 2010, 12:00am PDT
Creating software systems begins with creating abstractions that model the problem and/or solution. The most popular paradigm for creating these abstractions is Object-Oriented Programming (OOP),...
Provided by Rensselaer Polytechnic Institute
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White Papers
Measuring Behavioral Trust in Social Networks
April 1, 2010, 12:00am PDT
Trust is an important yet complex and little understood dyadic relation among actors in a social network. There are many dimensions to trust; trust plays an important role in the formation of...
Provided by Rensselaer Polytechnic Institute
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White Papers
Active Attacks Against Modulation-Based Radiometric Identification
August 3, 2009, 12:00am PDT
Radiometric identification is a recently coined term that describes a broad category of techniques for determining the identity of a wireless device based on unique characteristics of its...
Provided by Rensselaer Polytechnic Institute
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White Papers
Static Analysis for Understanding Shared Objects in Open Concurrent Java Programs
August 6, 2010, 12:00am PDT
Concurrent programming with shared memory in an object-oriented language such as Java is notoriously difficult. Therefore, it is important to study new program understanding techniques for...
Provided by Rensselaer Polytechnic Institute
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White Papers
Practical Static Analysis for Inference of Security-Related Program Properties
February 8, 2009, 12:00am PST
The authors present a static analysis framework for inference of security-related program properties. Within this framework the authors design and implement ownership, immutability and information...
Provided by Rensselaer Polytechnic Institute
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White Papers
Ownership and Immutability Inference for UML-Based Object Access Control
December 31, 2007, 12:00am PST
The authors propose a mechanism for object access control which is based on the UML. Specifically, they propose use of ownership and immutability constraints on UML associations and verification...
Provided by Rensselaer Polytechnic Institute
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White Papers
ASAND: Asynchronous Slot Assignment and Neighbor Discovery Protocol for Wireless Networks
January 10, 2008, 12:00am PST
Slot assignment is crucial for time-multiplexed channel access schemes. All existing approaches for slot assignment assume that the network nodes are synchronized with high precision, which is...
Provided by Rensselaer Polytechnic Institute
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White Papers
Recursive Data Mining for Author and Role Identification
May 19, 2008, 12:00am PDT
Like paintings and verbal dialogues, written documents exhibit the author's distinctive style and identification of the author of an anonymous document is an important and challenging task in...
Provided by Rensselaer Polytechnic Institute
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White Papers
Evaluation of Privacy Preserving Algorithms Using Traffic Knowledge Based Adversary Models
July 29, 2011, 12:00am PDT
By providing location traces of individual vehicles, mobile traffic sensors have quickly emerged as an important data source for traffic applications. In dealing with the privacy issues associated...
Provided by Rensselaer Polytechnic Institute
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White Papers
Parallel I/O Performance for Application-Level Checkpointing on the Blue Gene/P System
July 28, 2011, 12:00am PDT
As the number of processors increases to hundreds of thousands in parallel computer architectures, the failure probability rises correspondingly, making fault tolerance a highly important and...
Provided by Rensselaer Polytechnic Institute
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White Papers
Bio-Inspired Multi-Period Routing Algorithms in Delay Tolerant Networks
August 14, 2011, 12:00am PDT
In this paper, inspired by the impact of incubation period on epidemic dynamics, the authors present a class of routing algorithms for Delay Tolerant Networks (DTN) in which the copies or coded...
Provided by Rensselaer Polytechnic Institute
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White Papers
Analysis of Cost-Quality Tradeoff in Cooperative Ad Hoc Sensor Networks
September 1, 2008, 12:00am PDT
In wireless ad hoc sensor networks, cooperation of nodes provides sensors with a broader range of information, often leading to an improvement in network's ability to meet its global objectives....
Provided by Rensselaer Polytechnic Institute
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White Papers
Relational Algebra Coarse Grained Query Cost Models for DDFDs
September 16, 2010, 12:00am PDT
This paper defines a number of Query models used to visualize and explore the performance of Relational Algebra queries evaluated in a Dynamic, Distributed and Federated Database with a number of...
Provided by Rensselaer Polytechnic Institute
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White Papers
Computing With Time: From Neural Networks to Wireless Networks
February 17, 2007, 12:00am PST
This paper advocates a new computing paradigm, called computing with time, that is capable of efficiently performing a certain class of computation, namely, searching in parallel for the closest...
Provided by Rensselaer Polytechnic Institute
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White Papers
Cost Effective Multi-Period Spraying for Routing in Delay Tolerant Networks
February 17, 2007, 12:00am PST
In this paper, the authors' present a novel, multi-period spraying algorithm for routing in Delay Tolerant Networks (DTN). The goal is to minimize the average copy count used per message until the...
Provided by Rensselaer Polytechnic Institute
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White Papers
Self-Healing Routing for Wireless Ad Hoc Sensor Networks
July 10, 2007, 12:00am PDT
This paper presents a novel protocol, Self-Healing Routing (SHR), for opportunistic multi-hop wireless communication. The protocol uses broadcast communication and a prioritized slotted...
Provided by Rensselaer Polytechnic Institute
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White Papers
Self-Healing Routing: A Study in Efficiency and Resiliency of Data Delivery in Wireless Sensor Networks
March 12, 2007, 12:00am PDT
This paper presents the results of implementation of a novel protocol, Self-Healing Routing (SHR) for opportunistic multi-hop wireless communication, on MicaZ sensor motes. The protocol uses...
Provided by Rensselaer Polytechnic Institute
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White Papers
Dynamic Service Composition in Sensor Networks
February 28, 2010, 12:00am PST
Service modeling and composition is a fundamental method for offering advanced functionality by combining a set of primitive services provided by the system. Unlike in the case of web services for...
Provided by Rensselaer Polytechnic Institute
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White Papers
A Model-Driven Approach to the Construction, Composition and Analysis of Services on Sensor Networks
July 26, 2010, 12:00am PDT
This paper investigates the application of model-driven techniques to the construction and composition of services on sensor networks. The authors present a model that gives the user a visual...
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White Papers
Sensors as a Service Oriented Architecture: Middleware for Sensor Networks
July 28, 2010, 12:00am PDT
There is a significant challenge in designing, optimizing, deploying and managing complex sensor networks over heterogeneous communications infrastructures. The ITA Sensor Fabric addresses these...
Provided by Rensselaer Polytechnic Institute
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White Papers
Cognitive and Self-Healing Algorithms for Fault Tolerant Routing
September 15, 2007, 12:00am PDT
New approaches to Quality-of-Service (QoS) Rout-ing in wireless sensor networks which use different forms of learning are the subject of this paper. The Cognitive Packet Network (CPN) algorithm...
Provided by Rensselaer Polytechnic Institute
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White Papers
An End-to-End Transport Protocol for Extreme Wireless Network Environments
January 1, 2012, 12:00am PST
As the Joint forces move towards the vision of Network-Centric Warfare (NCW), it is extremely important that the network services be reliable and dependable, even under degraded network...
Provided by Rensselaer Polytechnic Institute
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White Papers
Hybrid Packet FEC and Retransmission-Based Erasure Recovery Mechanisms (HARQ) for Lossy Networks: Analysis and Design
November 12, 2006, 12:00am PST
With increasing dependence on wireless networks as an integral part of the communication infrastructure, it is critical that data link and transport layer protocols perform reasonably under...
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White Papers
MPLOT: A Transport Protocol Exploiting Multipath Diversity Using Erasure Codes
January 15, 2008, 12:00am PST
In this paper, the authors propose a novel transport protocol that effectively utilizes available bandwidth and diversity gains provided by heterogeneous, highly lossy paths. Their Multi-Path...
Provided by Rensselaer Polytechnic Institute
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White Papers
A Distributed System for Cooperative MIMO Transmissions
October 20, 2008, 12:00am PDT
In this paper, the authors propose a distributed system for facilitating cooperative MIMO transmissions in networks without multiple antenna devices. MIMO diversity is achieved by employing groups...
Provided by Rensselaer Polytechnic Institute
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White Papers
Fine Grain Adaptive Fec (FGA-FEC) Over Wireless Networks
August 5, 2007, 12:00am PDT
In this paper, the authors extend their proposed FGA-FEC coding scheme, a generalized MD-FEC method, to wireless networks. To protect the encoded scalable video bitstream over a lossy channel and...
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White Papers
Distributed Fine Grain Adaptive-FEC Scheme for Scalable Video Streaming
November 19, 2007, 12:00am PST
In this paper, the authors investigate a distributed Fine Grain Adaptive FEC (FGA-FEC) scheme for scalable video streaming to heterogeneous users over a congested multihop network, where they do...
Provided by Rensselaer Polytechnic Institute
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White Papers
The Interplay of Optimization and Machine Learning Research
October 22, 2006, 12:00am PDT
The fields of machine learning and mathematical programming are increasingly intertwined. Optimization problems lie at the heart of most machine learning approaches. The Special Topic on Machine...
Provided by Rensselaer Polytechnic Institute
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White Papers
A MAC Protocol for Cooperative MIMO Transmissions in Sensor Networks
March 23, 2007, 12:00am PDT
Cooperative MIMO can achieve higher energy saving and lower delay in distributed systems by allowing nodes to transmit and receive information jointly. In this paper, the authors develop a new MAC...
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White Papers
Asynchronous Cooperative MIMO Communication and Capacity Analysis
October 5, 2006, 12:00am PDT
In wireless environment the fading effects and channel variation often degrade signal transmission and increase bit error rate. Diversity techniques have been widely used to suppress channel...
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White Papers
Energy Efficient Cooperative MIMO Systems
July 3, 2007, 12:00am PDT
In this paper, the authors propose an energy efficient cooperative MIMO system. Space-Time Block Codes (STBC) and code combining techniques are applied to utilize the inherent spatial diversity in...
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White Papers
A Distributed Cooperative Target Tracking With Binary Sensor Networks
February 21, 2008, 12:00am PST
Target tracking is a typical and important cooperative sensing application of wireless sensor networks. The authors study it in its most basic form, assuming the binary sensing model in which each...
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White Papers
A Cost-Quality Tradeoff in Cooperative Sensor Networking
February 21, 2008, 12:00am PST
Wireless sensor networks consist of a large number of sensor nodes, each of which senses, computes and communicates with other nodes to collect and process data about the environment. Those...
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White Papers
Distributed Target Tracking With Imperfect Binary Sensor Networks
March 31, 2008, 12:00am PDT
The authors study target tracking with wireless sensor networks in its most basic form, assuming the binary sensing model in which each sensor can return only 1-bit information regarding target's...
Provided by Rensselaer Polytechnic Institute
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White Papers
Time Dependent Message Spraying for Routing in Intermittently Connected Networks
January 1, 2011, 12:00am PST
Intermittently connected mobile networks, also called Delay Tolerant Networks (DTN) are wireless networks in which at any given time instance, the probability of having a complete path from a...
Provided by Rensselaer Polytechnic Institute
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White Papers
Minimizing Average Spraying Cost for Routing in Delay Tolerant Networks
January 1, 2011, 12:00am PST
In this paper, the authors study cost efficient multi-copy spraying algorithm for routing in Delay Tolerant Networks (DTN) in which source-to-destination path does not exist most of the time. They...
Provided by Rensselaer Polytechnic Institute
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White Papers
Balancing Cost-Quality Tradeoff in Cooperative Ad Hoc Sensor Networks
January 1, 2011, 12:00am PST
In wireless ad hoc and sensor networks, each node is capable of functioning using only its local information about the environment. However, such a node can reach only locally optimal decisions...
Provided by Rensselaer Polytechnic Institute
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White Papers
Impact of Social Networks in Delay Tolerant Routing
January 1, 2011, 12:00am PST
Delay Tolerant Networks (DTNs) are wireless networks in which at any given time instance, the probability of having a complete path from a source to destination is low due to the intermittent...
Provided by Rensselaer Polytechnic Institute
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White Papers
PCFG Based Synthetic Mobility Trace Generation
March 7, 2010, 12:00am PST
This paper introduces a novel method of generating mobility traces based on Probabilistic Context Free Grammars (PCFGs). A PCFG is a generalization of a context free grammar in which each...
Provided by Rensselaer Polytechnic Institute
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White Papers
On Secure Multi-Copy Based Routing in Compromised Delay Tolerant Networks
May 11, 2011, 12:00am PDT
Routing in Delay Tolerant Networks (DTNs) is challenging due to their unique characteristics of intermittent node connectivity. Different protocols (single-copy, multi-copy, erasure-coding-based...
Provided by Rensselaer Polytechnic Institute
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White Papers
Wavelet Based Detection of Session Hijacking Attacks in Wireless Networks
August 16, 2008, 12:00am PDT
This paper develops a mechanism for detecting session hijacking attacks in wireless networks. The proposed scheme is based on detecting abrupt changes in the strength of the received signal. The...
Provided by Rensselaer Polytechnic Institute
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White Papers
A Self-Selection Technique for Flooding and Routing in Wireless Ad-Hoc Networks
September 1, 2006, 12:00am PDT
There is a fundamental difference between wireless and wired networks, since the latter employ point-to-point communication while the former use broadcast transmission as the communication...
Provided by Rensselaer Polytechnic Institute
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White Papers
Does Emerging Market Liberalization Help Or Hinder Local Monetary Policy?
November 26, 2007, 12:00am PST
The authors find that following market liberalization stock returns are sensitive to monetary policy shocks in 13 of 18 emerging markets. Prior to liberalization they are not. Whether or not...
Provided by Rensselaer Polytechnic Institute
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White Papers
A Relative Ad hoc Localization Scheme Using Optical Wireless
December 1, 2006, 12:00am PST
Directional communication (for example, using directional antennas or free-space optics) has the potential to dramatically increase capacity reuse in multi-hop wireless mesh and ad hoc networks....
Provided by Rensselaer Polytechnic Institute
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White Papers
Channel Assignment for Maximum Throughput in Multi-Channel Access Point Networks
October 3, 2006, 12:00am PDT
The authors consider the uplink channel assignment problem in a multi-channel access point wireless network, with the goal of attaining maximum system throughput. In this setup, a set of...
Provided by Rensselaer Polytechnic Institute
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White Papers
Scheduling Algorithms for Point-to-Multipoint Operation in IEEE 802.16 Networks
January 1, 2011, 12:00am PST
The authors study the resource allocation problem in OFDMA based 802.16 broadband wireless access systems. Frequency and time resources must be allocated by a central controller (Base Station) to...
Provided by Rensselaer Polytechnic Institute
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White Papers
VTL Zone-Aware Path Cloaking Algorithm
July 31, 2011, 12:00am PDT
Traffic engineering applications often benefit from collecting vehicle GPS traces in well-defined locations. As a motivating example, the authors will consider a traffic signal performance...
Provided by Rensselaer Polytechnic Institute
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White Papers
Efficient Broadcast in MANETs Using Network Coding and Directional Antennas
January 14, 2008, 12:00am PST
In this paper, the authors consider the issue of efficient broadcasting in Mobile Ad hoc NETworks (MANETs) using network coding and directional antennas. Network coding-based broadcasting focuses...
Provided by Rensselaer Polytechnic Institute
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