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Drexel University
(52 results)-
White Papers
Task Dependency of User Perceived Utility in Autonomic VoIP Systems
December 22, 2007, 12:00am PST
The transmission of voice-over-Internet protocol (VoIP) network traffic is used in an increasing variety of applications and settings. Many of these applications involve communications where VoIP...
Provided by Drexel University
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White Papers
OntoNet: Scalable Knowledge-Based Networking
February 1, 2008, 12:00am PST
Recent years have seen a proliferation of work on the Semantic Web, an initiative to enable intelligent agents to reason about and utilize World Wide Web content and services. Concurrently, the...
Provided by Drexel University
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White Papers
Performance Comparison and Analysis of Two QoS Schemes: SWAN and Diffserv
January 1, 2010, 12:00am PST
This paper compares and analyzes the performance of two QoS schemes for MANETs: SWAN and DiffServ. The comparison is performed both qualitatively and quantitatively (by simulations). Authors also...
Provided by Drexel University
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White Papers
Analysis and Comparison of Data Visualization Using Two Popular Tools: Many Eyes and Swivel
March 16, 2008, 12:00am PDT
This paper analyzes and compares visualization capabilities provided by two freely available popular social information visualization tools, Many Eyes and Swivel. Both tools are easily accessible...
Provided by Drexel University
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White Papers
Software Design - Position Paper: SOA on Wireless Networks
November 13, 2007, 12:00am PST
The Service Orientated Architecture (SOA) has become popular for implementing distributed computing applications. There are several benefits that SOA provides to these applications, such as...
Provided by Drexel University
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White Papers
Resource Management in Volunteer Computing Grids
November 10, 2007, 12:00am PST
The success of Volunteer Computing (VC) grid applications depends greatly on the systems ability to effectively manage the resources available to it. The most popular middleware application,...
Provided by Drexel University
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White Papers
Migration of Legacy Software to Service Oriented Architecture
November 11, 2007, 12:00am PST
Legacy software is in use at a great number of organizations. Although organizations commonly get a great deal of value from their legacy systems eventually most legacy systems need to be...
Provided by Drexel University
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White Papers
Application of SOA in Content Management Systems (CMS)
January 1, 2011, 12:00am PST
There exists a large genre of Content Management System in the domain of finance, insurance, and retail industries. In real world systems, data frequently comes from various sources including...
Provided by Drexel University
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White Papers
Infrastructure Service Approach to Handling Security in Service-Oriented Architecture Business Applications
January 1, 2011, 12:00am PST
Recently there has been a shift in distributed computing from middleware-oriented architectures to Service Oriented Architectures (SOA). However, security is a crucial requirement for the serious...
Provided by Drexel University
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White Papers
Power and Performance Management of Virtualized Computing Environments Via Lookahead Control
September 21, 2008, 12:00am PDT
There is growing incentive to reduce the power consumed by large-scale data centers that host online services such as banking, retail commerce, and gaming. Virtualization is a promising approach...
Provided by Drexel University
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White Papers
Risk Management Of Precious Metals
March 1, 2011, 12:00am PST
This paper examines volatility and correlation dynamics in price returns of gold, silver, platinum and palladium, and explores the corresponding risk management implications for market risk and...
Provided by Drexel University
-
White Papers
Page-Differential Logging: An Efficient and DBMS-independent Approach for Storing Data into Flash Memory
January 21, 2010, 12:00am PST
Flash memory is widely used as the secondary storage in lightweight computing devices due to its outstanding advantages over magnetic disks. Flash memory has many access characteristics different...
Provided by Drexel University
-
White Papers
Optimal Cooperative Relaying Schemes for Improving Wireless Physical Layer Security
January 9, 2010, 12:00am PST
The authors consider a cooperative wireless network in the presence of one of more eavesdroppers, and exploit node cooperation for achieving PHYsical (PHY) layer based security. Two different...
Provided by Drexel University
-
White Papers
Transmission Capacity of Ad Hoc Networks With Spatial Diversity
August 11, 2008, 12:00am PDT
This paper derives the outage probability and transmission capacity of ad hoc wireless networks with nodes employing multiple antenna diversity techniques, for a general class of signal...
Provided by Drexel University
-
White Papers
A New Distributed Topology Control Algorithm for Wireless Environments with Non-Uniform Path Loss and Multipath Propagation
November 13, 2009, 12:00am PST
Each node in a wireless multi-hop network can adjust the power level at which it transmits and thus change the topology of the network to save energy by choosing the neighbors with which it...
Provided by Drexel University
-
White Papers
Cooperative Jamming for Wireless Physical Layer Security
July 28, 2009, 12:00am PDT
Cooperative jamming is an approach that has been recently proposed for improving physical layer based security for wireless networks in the presence of an eavesdropper. While the source transmits...
Provided by Drexel University
-
White Papers
Transmitter Optimization for Achieving Secrecy Capacity in Gaussian MIMO Wiretap Channels
September 14, 2009, 12:00am PDT
The authors consider a Gaussian Multiple-Input Multiple-Output (MIMO) wiretap channel model, where there exists a transmitter, a legitimate receiver and an eavesdropper, each node equipped with...
Provided by Drexel University
-
White Papers
ALOHA With Collision Resolution(ALOHA-CR): Theory and Software Defined Radio Implementation
September 16, 2009, 12:00am PDT
A cross-layer scheme, namely ALOHA with Collision Resolution (ALOHA-CR), is proposed for high throughput wireless communications in a cellular scenario. Transmissions occur in a time-slotted...
Provided by Drexel University
-
White Papers
On Improving the Representation of a Region Achieved by a Sensor Network
March 24, 2010, 12:00am PDT
This paper considers the class of applications of sensor networks in which each sensor node makes measurements, such as temperature or humidity, at the precise location of the node. Such...
Provided by Drexel University
-
White Papers
Drop-Down Democracy: Internet Portal Design Influences Voters' Search Strategies
September 13, 2007, 12:00am PDT
In this paper the authors report how different interfaces for searching the internet changed the strategies and information opportunities of voters as they searched for political information. A...
Provided by Drexel University
-
White Papers
Reasons For Financing R&D Using The SWORD Structure
September 24, 2007, 12:00am PDT
Several companies in the science and technology-based industries used the SWORD structure to finance part of their R&D programs. Yet, there is no clear rational or evidence that this structure is...
Provided by Drexel University
-
White Papers
Within And Across Country Inequality In A Model Of Trade And Endogenous Growth
May 19, 2009, 12:00am PDT
This paper addresses the dynamics of income inequality, both within and across countries. In an endogenous growth model with North-South trade, the dynamics of income inequality depend on the...
Provided by Drexel University
-
White Papers
Financing Decisions And Discretionary Accruals: Managerial Manipulation Or Managerial Overoptimism
December 3, 2007, 12:00am PST
The authors examine whether discretionary accruals of firms obtaining substantial external financing can be explained by managerial manipulation or managerial overoptimism. Consistent with Teoh,...
Provided by Drexel University
-
White Papers
Transmission Of Monetary Policy Via Domestic And Foreign Banks In Emerging Economies: Evidence From Bank-Level Data
November 1, 2007, 12:00am PDT
This paper examines empirically the existence of a bank lending channel for the transmission of monetary policy in emerging markets, by comparing responses of domestic and foreign banks to host...
Provided by Drexel University
-
Whitepapers
ODYS: A Massively-Parallel Search Engine Using a DB-IR Tightly-Integrated Parallel DBMS
August 21, 2012, 12:00am PDT
Recently, parallel search engines have been implemented based on scalable distributed file systems such as Google File System. However, the authors claim that building a massively-parallel search...
Provided by Drexel University
-
Whitepapers
Capacity Region of the Permutation Channel
September 26, 2008, 12:00am PDT
The authors discuss the capacity region of a Degraded Broadcast Channel (DBC) formed from a channel that randomly permutes input packets by selecting a permutation according to a probability...
Provided by Drexel University
-
Whitepapers
Practical Codes for Lossy Compression When Side Information May Be Absent
February 14, 2011, 12:00am PST
Practical codes are developed for quadratic Gaussian lossy compression when side information may be absent by hybridizing Successively Refinable Trellis Coded Quantization (SR-TCQ) and Low-Density...
Provided by Drexel University
-
White Papers
SDC Testbed: Software Defined Communications Testbed for Wireless Radio and Optical Networking
January 12, 2011, 12:00am PST
This paper describes the development of a new Software Defined Communications (SDC) testbed architecture. SDC aims to generalize the area of software defined radio to include propagation media not...
Provided by Drexel University
-
White Papers
Empirical Analysis Of Herding Behavior In Global Markets: Evidence From Industry Stock Returns
December 3, 2007, 12:00am PST
This paper examines investors' herding behavior in an international setting. Using different measures of the cross-sectional dispersions of industry stock returns, the authors find supportive...
Provided by Drexel University
-
White Papers
Coding Perspectives for Collaborative Estimation Over Networks
June 1, 2010, 12:00am PDT
A collaborative distributed estimation problem over a communication constrained network is considered from an information theory perspective. A suitable architecture for the codes for this...
Provided by Drexel University
-
White Papers
Distributed Estimation of Channel Gains in Sensor Networks
November 4, 2008, 12:00am PST
Channel estimation algorithms are proposed for the initialization phase of a wireless sensor network, during which the nodes are still unaware of their neighbors or channel qualities. Both...
Provided by Drexel University
-
White Papers
Belief Propagation Distributed Estimation in Sensor Networks: An Optimized Energy Accuracy Tradeoff
January 18, 2008, 12:00am PST
The estimation error performance of Gaussian belief propagation based distributed estimation in a large sensor network employing random sleep strategies is explicitly evaluated for a simple model...
Provided by Drexel University
-
White Papers
A Concatenated Network Coding Scheme for Multimedia Transmission
November 19, 2007, 12:00am PST
The authors discuss a coding technique for transmitting temporally ordered and/or successive refinements encoded multimedia data (such as MPEG video) over a multi-cast network using recently...
Provided by Drexel University
-
White Papers
Coding Perspectives for Collaborative Distributed Estimation Over Networks
December 30, 2009, 12:00am PST
A collaborative distributed estimation problem over a communication constrained network is considered from an information theory perspective. It is shown that the distributed estimation problem is...
Provided by Drexel University
-
White Papers
The Ethernet Speaker System
January 1, 2008, 12:00am PST
If one wishes to distribute audio in a large room, building, or even a campus, one needs multiple speakers. These speakers must be jointly managed and synchronized. The Ethernet Speaker (ES)...
Provided by Drexel University
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White Papers
The Bandwidth Exchange Architecture
January 1, 2008, 12:00am PST
New applications for the Internet such as video on demand, grid computing etc. depend on the availability of high bandwidth connections with acceptable Quality of Service (QoS). There appears to...
Provided by Drexel University
-
White Papers
From Retrospect to Prospect: Assessing Modularity and Stability From Software Architecture
August 19, 2009, 12:00am PDT
Architecture-level decisions, directly influenced by environmental factors, are crucial to preserve modularity and stability throughout software development life-cycle. Tradeoffs of modularization...
Provided by Drexel University
-
White Papers
Detecting Software Modularity Violations
September 12, 2010, 12:00am PDT
This paper presents Clio, an approach that detects modularity violations, which can cause software defects, modularity decay, or expensive refactorings. Clio computes the discrepancies between how...
Provided by Drexel University
-
White Papers
Longest Edge Routing on the Spatial Aloha Graph
September 12, 2011, 12:00am PDT
The Multihop Spatial Reuse Aloha (MSR-Aloha) protocol was recently introduced by Baccelli et al., where each transmitter selects the receiver among its feasible next hops that maximizes the...
Provided by Drexel University
-
White Papers
A Tutorial on Transmission Capacity
August 14, 2009, 12:00am PDT
This paper unifies a number of recent contributions that have collectively developed a metric for decentralized wireless network analysis known as transmission capacity. Although it is notoriously...
Provided by Drexel University
-
Whitepapers
Rate Region for a Class of Delay Mitigating Codes and P2P Networks
March 27, 2012, 12:00am PDT
This paper identifies the relevance of a distributed source coding problem first formulated by Yeung and Zhang in 1999 to two applications in network design: the design of delay mitigating codes,...
Provided by Drexel University
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Whitepapers
A Computational Approach for Determining Rate Regions and Codes Using Entropic Vector Bounds
July 10, 2012, 12:00am PDT
A computational technique for determining rate regions for networks and multilevel diversity coding systems based on inner and outer bounds for the region of entropic vectors is discussed. An...
Provided by Drexel University
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Whitepapers
A New Computational Approach for Determining Rate Regions and Optimal Codes for Coded Networks
June 4, 2013, 12:00am PDT
A new computational technique is presented for determining rate regions for coded networks. The technique directly manipulates the extreme ray representation of inner and outer bounds for the...
Provided by Drexel University
-
Whitepapers
Practical Codes for Lossy Compression When Side Information May Be Absent
February 14, 2011, 12:00am PST
Practical codes are developed for quadratic Gaussian lossy compression when side information may be absent by hybridizing Successively Refinable Trellis Coded Quantization (SR-TCQ) and Low-Density...
Provided by Drexel University
-
Whitepapers
Capacity Region of the Permutation Channel
September 26, 2008, 12:00am PDT
The authors discuss the capacity region of a Degraded Broadcast Channel (DBC) formed from a channel that randomly permutes input packets by selecting a permutation according to a probability...
Provided by Drexel University
-
Whitepapers
ODYS: A Massively-Parallel Search Engine Using a DB-IR Tightly-Integrated Parallel DBMS
August 21, 2012, 12:00am PDT
Recently, parallel search engines have been implemented based on scalable distributed file systems such as Google File System. However, the authors claim that building a massively-parallel search...
Provided by Drexel University
-
Whitepapers
Cooperative Topology Control With Adaptation for Improved Lifetime in Wireless Ad Hoc Networks
January 13, 2012, 12:00am PST
Topology control algorithms allow each node in a wireless multi-hop network to adjust the power at which it makes its transmissions and choose the set of neighbors with which it communicates...
Provided by Drexel University
-
White Papers
A Case Study on the Automatic Composition of Network Application Mashups
July 1, 2008, 12:00am PDT
MaxMash is a tool that can compose select features of networked application and generate the source code for application mashups that can integrate those features. This paper presents a case study...
Provided by Drexel University
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White Papers
Software Analysis for Security
June 24, 2008, 12:00am PDT
The goal of computer security is to protect computer assets (e.g., servers, applications, web pages, data) from corruption, unauthorized access, denial of authorized access, malicious software...
Provided by Drexel University
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White Papers
On the Use of Discretized Source Code Metrics for Author Identification
March 12, 2009, 12:00am PDT
Intellectual property infringement and plagiarism litigation involving source code would be more easily resolved using code authorship identification tools. Previous efforts in this area have...
Provided by Drexel University
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White Papers
On Evaluating the Efficiency of Software Feature Development Using Algebraic Manifolds
July 1, 2008, 12:00am PDT
Managers are often unable to explain objectively why or when effort was misplaced during the development process. In this paper, the authors present a formal technique to depict the expended...
Provided by Drexel University
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White Papers
Thr2csp: Toward Transforming Threads Into Communicating Sequential Processes
June 24, 2009, 12:00am PDT
As multicore and heterogeneous multiprocessor platforms replace uni-processor systems, software programs must be designed with a greater emphasis on concurrency. Threading has become the dominant...
Provided by Drexel University
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White Papers
Reverse Engineering Utility Functions using Genetic Programming to Detect Anomalous Behavior in Software
August 6, 2010, 12:00am PDT
Recent studies have shown the promise of using utility functions to detect anomalous behavior in software systems at runtime. However, it remains a challenge for software engineers to hand-craft a...
Provided by Drexel University
-
White Papers
On the Maintenance of UI-Integrated Mashup Applications
September 8, 2011, 12:00am PDT
This paper describes the maintenance of long-lived mashup applications that are integrated at the User Interface (UI) layer. It presents techniques that help mashup developers to maintain...
Provided by Drexel University
-
White Papers
Diagnosis of Software Failures Using Computational Geometry
September 21, 2011, 12:00am PDT
Complex software systems have become commonplace in modern organizations and are considered critical to their daily operations. They are expected to run on a diverse set of platforms while...
Provided by Drexel University
-
White Papers
A Tutorial on Transmission Capacity
August 14, 2009, 12:00am PDT
This paper unifies a number of recent contributions that have collectively developed a metric for decentralized wireless network analysis known as transmission capacity. Although it is notoriously...
Provided by Drexel University
-
White Papers
Longest Edge Routing on the Spatial Aloha Graph
September 12, 2011, 12:00am PDT
The Multihop Spatial Reuse Aloha (MSR-Aloha) protocol was recently introduced by Baccelli et al., where each transmitter selects the receiver among its feasible next hops that maximizes the...
Provided by Drexel University
-
White Papers
Detecting Software Modularity Violations
September 12, 2010, 12:00am PDT
This paper presents Clio, an approach that detects modularity violations, which can cause software defects, modularity decay, or expensive refactorings. Clio computes the discrepancies between how...
Provided by Drexel University
-
White Papers
From Retrospect to Prospect: Assessing Modularity and Stability From Software Architecture
August 19, 2009, 12:00am PDT
Architecture-level decisions, directly influenced by environmental factors, are crucial to preserve modularity and stability throughout software development life-cycle. Tradeoffs of modularization...
Provided by Drexel University
-
White Papers
Coding Perspectives for Collaborative Distributed Estimation Over Networks
December 30, 2009, 12:00am PST
A collaborative distributed estimation problem over a communication constrained network is considered from an information theory perspective. It is shown that the distributed estimation problem is...
Provided by Drexel University
-
White Papers
A Concatenated Network Coding Scheme for Multimedia Transmission
November 19, 2007, 12:00am PST
The authors discuss a coding technique for transmitting temporally ordered and/or successive refinements encoded multimedia data (such as MPEG video) over a multi-cast network using recently...
Provided by Drexel University
-
White Papers
Belief Propagation Distributed Estimation in Sensor Networks: An Optimized Energy Accuracy Tradeoff
January 18, 2008, 12:00am PST
The estimation error performance of Gaussian belief propagation based distributed estimation in a large sensor network employing random sleep strategies is explicitly evaluated for a simple model...
Provided by Drexel University
-
White Papers
Distributed Estimation of Channel Gains in Sensor Networks
November 4, 2008, 12:00am PST
Channel estimation algorithms are proposed for the initialization phase of a wireless sensor network, during which the nodes are still unaware of their neighbors or channel qualities. Both...
Provided by Drexel University
-
White Papers
Coding Perspectives for Collaborative Estimation Over Networks
June 1, 2010, 12:00am PDT
A collaborative distributed estimation problem over a communication constrained network is considered from an information theory perspective. A suitable architecture for the codes for this...
Provided by Drexel University
-
White Papers
Empirical Analysis Of Herding Behavior In Global Markets: Evidence From Industry Stock Returns
December 3, 2007, 12:00am PST
This paper examines investors' herding behavior in an international setting. Using different measures of the cross-sectional dispersions of industry stock returns, the authors find supportive...
Provided by Drexel University
-
White Papers
SDC Testbed: Software Defined Communications Testbed for Wireless Radio and Optical Networking
January 12, 2011, 12:00am PST
This paper describes the development of a new Software Defined Communications (SDC) testbed architecture. SDC aims to generalize the area of software defined radio to include propagation media not...
Provided by Drexel University
-
White Papers
Transmission Of Monetary Policy Via Domestic And Foreign Banks In Emerging Economies: Evidence From Bank-Level Data
November 1, 2007, 12:00am PDT
This paper examines empirically the existence of a bank lending channel for the transmission of monetary policy in emerging markets, by comparing responses of domestic and foreign banks to host...
Provided by Drexel University
-
White Papers
Financing Decisions And Discretionary Accruals: Managerial Manipulation Or Managerial Overoptimism
December 3, 2007, 12:00am PST
The authors examine whether discretionary accruals of firms obtaining substantial external financing can be explained by managerial manipulation or managerial overoptimism. Consistent with Teoh,...
Provided by Drexel University
-
White Papers
Within And Across Country Inequality In A Model Of Trade And Endogenous Growth
May 19, 2009, 12:00am PDT
This paper addresses the dynamics of income inequality, both within and across countries. In an endogenous growth model with North-South trade, the dynamics of income inequality depend on the...
Provided by Drexel University
-
White Papers
Reasons For Financing R&D Using The SWORD Structure
September 24, 2007, 12:00am PDT
Several companies in the science and technology-based industries used the SWORD structure to finance part of their R&D programs. Yet, there is no clear rational or evidence that this structure is...
Provided by Drexel University
-
White Papers
Drop-Down Democracy: Internet Portal Design Influences Voters' Search Strategies
September 13, 2007, 12:00am PDT
In this paper the authors report how different interfaces for searching the internet changed the strategies and information opportunities of voters as they searched for political information. A...
Provided by Drexel University
-
White Papers
On Improving the Representation of a Region Achieved by a Sensor Network
March 24, 2010, 12:00am PDT
This paper considers the class of applications of sensor networks in which each sensor node makes measurements, such as temperature or humidity, at the precise location of the node. Such...
Provided by Drexel University
-
White Papers
ALOHA With Collision Resolution(ALOHA-CR): Theory and Software Defined Radio Implementation
September 16, 2009, 12:00am PDT
A cross-layer scheme, namely ALOHA with Collision Resolution (ALOHA-CR), is proposed for high throughput wireless communications in a cellular scenario. Transmissions occur in a time-slotted...
Provided by Drexel University
-
White Papers
Transmitter Optimization for Achieving Secrecy Capacity in Gaussian MIMO Wiretap Channels
September 14, 2009, 12:00am PDT
The authors consider a Gaussian Multiple-Input Multiple-Output (MIMO) wiretap channel model, where there exists a transmitter, a legitimate receiver and an eavesdropper, each node equipped with...
Provided by Drexel University
-
White Papers
Cooperative Jamming for Wireless Physical Layer Security
July 28, 2009, 12:00am PDT
Cooperative jamming is an approach that has been recently proposed for improving physical layer based security for wireless networks in the presence of an eavesdropper. While the source transmits...
Provided by Drexel University
-
White Papers
A New Distributed Topology Control Algorithm for Wireless Environments with Non-Uniform Path Loss and Multipath Propagation
November 13, 2009, 12:00am PST
Each node in a wireless multi-hop network can adjust the power level at which it transmits and thus change the topology of the network to save energy by choosing the neighbors with which it...
Provided by Drexel University
-
White Papers
Transmission Capacity of Ad Hoc Networks With Spatial Diversity
August 11, 2008, 12:00am PDT
This paper derives the outage probability and transmission capacity of ad hoc wireless networks with nodes employing multiple antenna diversity techniques, for a general class of signal...
Provided by Drexel University
-
White Papers
Optimal Cooperative Relaying Schemes for Improving Wireless Physical Layer Security
January 9, 2010, 12:00am PST
The authors consider a cooperative wireless network in the presence of one of more eavesdroppers, and exploit node cooperation for achieving PHYsical (PHY) layer based security. Two different...
Provided by Drexel University
-
White Papers
Page-Differential Logging: An Efficient and DBMS-independent Approach for Storing Data into Flash Memory
January 21, 2010, 12:00am PST
Flash memory is widely used as the secondary storage in lightweight computing devices due to its outstanding advantages over magnetic disks. Flash memory has many access characteristics different...
Provided by Drexel University
-
White Papers
Risk Management Of Precious Metals
March 1, 2011, 12:00am PST
This paper examines volatility and correlation dynamics in price returns of gold, silver, platinum and palladium, and explores the corresponding risk management implications for market risk and...
Provided by Drexel University
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