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Articles 31 - 60 of 139
Full-Text Articles in Computer Sciences
Gridbased Collaboration In Interactive Data Language Applications, Minjun Wang, Geoffrey C. Fox, Marlon Pierce
Gridbased Collaboration In Interactive Data Language Applications, Minjun Wang, Geoffrey C. Fox, Marlon Pierce
Electrical Engineering and Computer Science - All Scholarship
Interactive Data Language (IDL) is an array-oriented data analysis and visualization application, which is widely used in research, commerce, and education. It is meaningful to make user IDL applications collaborative between computers over networks, using a common message broker as the underlying communication system. In order to achieve the global collaboration, we have brought together in the research a Grid-based Collaboration paradigm, a Shared Event model, different implementing structures, methodologies and technologies. We have succeeded in our prototype codes, and we are currently working on a real life IDL application package to make it collaborative. At the same time, we …
Reliability-Centric High-Level Synthesis, S. Tosun, N. Mansouri, E. Arvas, Mahmut Kandemir, Yuan Xie
Reliability-Centric High-Level Synthesis, S. Tosun, N. Mansouri, E. Arvas, Mahmut Kandemir, Yuan Xie
Electrical Engineering and Computer Science - All Scholarship
Importance of addressing soft errors in both safety critical applications and commercial consumer products is increasing, mainly due to ever shrinking geometries, higher-density circuits, and employment of power-saving techniques such as voltage scaling and component shut-down. As a result, it is becoming necessary to treat reliability as a first-class citizen in system design. In particular, reliability decisions taken early in system design can have significant benefits in terms of design quality. Motivated by this observation, this paper presents a reliability-centric high-level synthesis approach that addresses the soft error problem. The proposed approach tries to maximize reliability of the design while …
Prototype Of Fault Adaptive Embedded Software For Large-Scale Real-Time Systems, Derek Messie, Mina Jung, Jae C. Oh, Shweta Shetty, Steven Nordstrom, Michael Haney
Prototype Of Fault Adaptive Embedded Software For Large-Scale Real-Time Systems, Derek Messie, Mina Jung, Jae C. Oh, Shweta Shetty, Steven Nordstrom, Michael Haney
Electrical Engineering and Computer Science - All Scholarship
This paper describes a comprehensive prototype of large-scale fault adaptive embedded software developed for the proposed Fermilab BTeV high energy physics experiment. Lightweight self-optimizing agents embedded within Level 1 of the prototype are responsible for proactive and reactive monitoring and mitigation based on specified layers of competence. The agents are self-protecting, detecting cascading failures using a distributed approach. Adaptive, reconfigurable, and mobile objects for reliability are designed to be self-configuring to adapt automatically to dynamically changing environments. These objects provide a self-healing layer with the ability to discover, diagnose, and react to discontinuities in real-time processing. A generic modeling environment …
Multi-Objective Mobile Agent Routing In Wireless Sensor Networks, Ramesh Rajagopalan, Chilukuri K. Mohan, Pramod Varshney, Kishan Mehrotra
Multi-Objective Mobile Agent Routing In Wireless Sensor Networks, Ramesh Rajagopalan, Chilukuri K. Mohan, Pramod Varshney, Kishan Mehrotra
Electrical Engineering and Computer Science - All Scholarship
A recent approach for data fusion in wireless sensor networks involves the use of mobile agents that selectively visit the sensors and incrementally fuse the data, thereby eliminating the unnecessary transmission of irrelevant or non-critical data. The order of sensors visited along the route determines the quality of the fused data and the communication cost. We model the mobile agent routing problem as a multi-objective optimization problem, maximizing the total detected signal energy while minimizing the energy consumption and path loss. Simulation results show that this problem can be solved successfully using evolutionary multi-objective algorithms such as EMOCA and NSGA-II. …
Adapting H.323 Terminals In A Service-Oriented Collaboration System, Wenjun Wu, Hasan Bulut, Ahmet Uyar, Geoffrey C. Fox
Adapting H.323 Terminals In A Service-Oriented Collaboration System, Wenjun Wu, Hasan Bulut, Ahmet Uyar, Geoffrey C. Fox
Electrical Engineering and Computer Science - All Scholarship
Global Multimedia Collaboration System (Global-MMCS), a scalable, robust and service-oriented collaboration system, can bridge H.323, SIP, Access Grid clients and 2.5G/3G cellular phones in audiovisual collaborations. The H.323 gateway in Global-MMCS enables H.323 terminals to interact with other clients, and provides them the complete H.323 conference control services.
Instantiations Of Shared Event Model In Grid-Based Collaboration, Minjun Wang, Geoffrey C. Fox, Marlon Pierce
Instantiations Of Shared Event Model In Grid-Based Collaboration, Minjun Wang, Geoffrey C. Fox, Marlon Pierce
Electrical Engineering and Computer Science - All Scholarship
The Internet is a global infrastructure that brings resources and people together. Diverse fields are prospering on it, such as Grid computing and collaboration. We demonstrate the Grid-based Collaboration idea by making three interface applications collaborative between computers over networks, using a common message broker as the underlying communication system. To achieve the global collaboration, we have brought together in the research a Grid-based Collaboration paradigm, a Shared Event model, different implementing structures, methodologies and technologies. We describe the applications’ event structures in messages coordinating the Grid-base collaboration. We further abstract the collaboration of the applications to be collaboration between …
Searching For High-Value Rare Events With Uncheatable Grid Computing, Wenliang Du, Michael T. Goodrich
Searching For High-Value Rare Events With Uncheatable Grid Computing, Wenliang Du, Michael T. Goodrich
Electrical Engineering and Computer Science - All Scholarship
High-value rare-event searching is arguably the most natural application of grid computing, where computational tasks are distributed to a large collection of clients (which comprise the computation grid) in such a way that clients are rewarded for performing tasks assigned to them. Although natural, rare-event searching presents significant challenges for a computation supervisor, who partitions and distributes the search space out to clients while contending with “lazy” clients, who don’t do all their tasks, and “hoarding ” clients, who don’t report rare events back to the supervisor. We provide schemes, based on a technique we call chaff injection, for efficiently …
Searching For High-Value Rare Events With Uncheatable Grid Computing, Wenliang Du, Michael T. Goodrich
Searching For High-Value Rare Events With Uncheatable Grid Computing, Wenliang Du, Michael T. Goodrich
Electrical Engineering and Computer Science - All Scholarship
High-value rare-event searching is arguably the most natural application of grid computing, where computational tasks are distributed to a large collection of clients (which comprise the computation grid) in such a way that clients are rewarded for performing tasks assigned to them. Although natural, rare-event searching presents significant challenges for a computation supervisor, who partitions and distributes the search space out to clients while contending with “lazy” clients, who don’t do all their tasks, and “hoarding ” clients, who don’t report rare events back to the supervisor. We provide schemes, based on a technique we call chaff injection, for efficiently …
A Key Management Scheme For Wireless Sensor Networks Using Deployment Knowledge, Wenliang Du, Jing Deng, Yunghsiang S. Han, Shigang Chen
A Key Management Scheme For Wireless Sensor Networks Using Deployment Knowledge, Wenliang Du, Jing Deng, Yunghsiang S. Han, Shigang Chen
Electrical Engineering and Computer Science - All Scholarship
To achieve security in wireless sensor networks, it is important to be able to encrypt messages sent among sensor nodes. Keys for encryption purposes must be agreed upon by communicating nodes. Due to resource constraints, achieving such key agreement in wireless sensor networks is non-trivial. Many key agreement schemes used in general networks, such as Diffie-Hellman and public-key based schemes, are not suitable for wireless sensor networks. Pre-distribution of secret keys for all pairs of nodes is not viable due to the large amount of memory used when the network size is large. Recently, a random key predistribution scheme and …
Uncheatable Grid Computing, Wenliang Du, Jing Jia, Manish Mangal, Mummoorthy Murugesan
Uncheatable Grid Computing, Wenliang Du, Jing Jia, Manish Mangal, Mummoorthy Murugesan
Electrical Engineering and Computer Science - All Scholarship
Grid computing is a type of distributed computing that has shown promising applications in many fields. A great concern in grid computing is the cheating problem described in the following: a participant is given D = {x1,...,xn}, it needs to compute f(x) for all x ∈ D and return the results of interest to the supervisor. How does the supervisor efficiently ensure that the participant has computed f(x) for all the inputs in D, rather than a subset of it? If participants get paid for conducting the task, there are incentives for cheating. In this paper, we propose a novel …
Privacy-Preserving Multivariate Statistical Analysis: Linear Regression And Classification, Wenliang Du, Yunghsiang S. Han, Shigang Chen
Privacy-Preserving Multivariate Statistical Analysis: Linear Regression And Classification, Wenliang Du, Yunghsiang S. Han, Shigang Chen
Electrical Engineering and Computer Science - All Scholarship
Analysis technique that has found applications in various areas. In this paper, we study some multivariate statistical analysis methods in Secure 2-party Computation (S2C) framework illustrated by the following scenario: two parties, each having a secret data set, want to conduct the statistical analysis on their joint data, but neither party is willing to disclose its private data to the other party or any third party. The current statistical analysis techniques cannot be used directly to support this kind of computation because they require all parties to send the necessary data to a central place. In this paper, We define …
Cooperative Game Theory Within Multi-Agent Systems For Systems Scheduling, Derek Messie, Jae C. Oh
Cooperative Game Theory Within Multi-Agent Systems For Systems Scheduling, Derek Messie, Jae C. Oh
Electrical Engineering and Computer Science - All Scholarship
Research concerning organization and coordination within multi-agent systems continues to draw from a variety of architectures and methodologies. The work presented in this paper combines techniques from game theory and multi-agent systems to produce self-organizing, polymorphic, lightweight, embedded agents for systems scheduling within a large-scale real-time systems environment. Results show how this approach is used to experimentally produce optimum real-time scheduling through the emergent behavior of thousands of agents. These results are obtained using a SWARM simulation of systems scheduling within a High Energy Physics experiment consisting of 2500 digital signal processors.
Context Sensitive Anomaly Monitoring Of Process Control Flow To Detect Mimicry Attacks And Impossible Paths, Haizhi Xu, Wenliang Du, Steve J. Chapin
Context Sensitive Anomaly Monitoring Of Process Control Flow To Detect Mimicry Attacks And Impossible Paths, Haizhi Xu, Wenliang Du, Steve J. Chapin
Electrical Engineering and Computer Science - All Scholarship
Many intrusions amplify rights or circumvent defenses by issuing system calls in ways that the original process did not. Defense against these attacks emphasizes preventing attacking code from being introduced to the system and detecting or preventing execution of the injected code. Another approach, where this paper fits in, is to assume that both injection and execution have occurred, and to detect and prevent the executing code from subverting the target system. We propose a method using waypoints: marks along the normal execution path that a process must follow to successfully access operating system services. Waypoints actively log trustworthy context …
Building Desktop Applications With Web Service In A Message-Based Mvc Paradigm”, To Appear, Xiaohong Qiu
Building Desktop Applications With Web Service In A Message-Based Mvc Paradigm”, To Appear, Xiaohong Qiu
Electrical Engineering and Computer Science - All Scholarship
Over the past decade, classic client side applications with Model-View-Controller (MVC) architecture haven’t changed much but become more complex. In this paper, we present an approach of building desktop applications with Web Services in an explicit message-based MVC paradigm. By integrating with our publish/subscribe messaging middleware, it makes SVG browser (a Microsoft PowerPoint like client application) with Web Service style interfaces universally accessible from different client platforms ─ Windows, Linux, MacOS, PalmOS and other customized ones. Performance data suggests that this scheme of building application around messages is a practical architecture for the next generation Web application client.
Decision Fusion In A Wireless Sensor Network With A Large Number Of Sensors, Ruixin Niu, Michael Moore, Dale Klamer
Decision Fusion In A Wireless Sensor Network With A Large Number Of Sensors, Ruixin Niu, Michael Moore, Dale Klamer
Electrical Engineering and Computer Science - All Scholarship
For a wireless sensor network (WSN) with a large number of sensors, a decision fusion rule using the total number of detections reported by local sensors for hypothesis testing, is proposed and studied. Based on a signal attenuation model where the received signal power decays as the distance from the target increases, the system level detection performance, namely probabilities of detection and false alarms, are derived and calculated. Without the knowledge of local sensors' performances and at low signal to noise ratio (SNR), this fusion rule can still achieve very good system level detection performance if the number of sensors …
A New Backoff Algorithm For The Ieee 802.11 Distributed Coordination Function, Jing Deng, Pramod K. Varshney, Zygmunt J. Haas
A New Backoff Algorithm For The Ieee 802.11 Distributed Coordination Function, Jing Deng, Pramod K. Varshney, Zygmunt J. Haas
Electrical Engineering and Computer Science - All Scholarship
In the IEEE 802.11 Wireless Local Area Networks (WLANs), network nodes experiencing collisions on the shared channel need to backoff for a random period of time, which is uniformly selected from the Contention Window (CW ). This contention window is dynamically controlled by the Binary Exponential Backoff (BEB) algorithm. The BEB scheme, as shown in some studies in the literature, suffers from a fairness problem and low throughput under high traffic load. In this paper, we propose a new backoff algorithm, termed the Linear/Multiplicative Increase and Linear Decrease (LMILD) backoff algorithm, for use with the IEEE 802.11 Distributed Coordination Function. …
Scheduling Sleeping Nodes In High Density Cluster-Based Sensor Networks, Jing Deng, Yunghsiang S. Han, Wendi B. Heinzelman, Pramod K. Varshney
Scheduling Sleeping Nodes In High Density Cluster-Based Sensor Networks, Jing Deng, Yunghsiang S. Han, Wendi B. Heinzelman, Pramod K. Varshney
Electrical Engineering and Computer Science - All Scholarship
In order to conserve battery power in very dense sensor networks, some sensor nodes may be put into the sleep state while other sensor nodes remain active for the sensing and communication tasks. In this paper, we study the node sleep scheduling problem in the context of clustered sensor networks. We propose and analyze the Linear Distance-based Scheduling (LDS) technique for sleeping in each cluster. The LDS scheme selects a sensor node to sleep with higher probability when it is farther away from the cluster head. We analyze the energy consumption, the sensing coverage property, and the network lifetime of …
Optimum Transmission Range For Wireless Ad Hoc Networks, Jing Deng, Yunghsiang S. Han, Po-Ning Chen, Pramod K. Varshney
Optimum Transmission Range For Wireless Ad Hoc Networks, Jing Deng, Yunghsiang S. Han, Po-Ning Chen, Pramod K. Varshney
Electrical Engineering and Computer Science - All Scholarship
The transmission range that achieves the most economical use of energy in wireless ad hoc networks is studied under homogeneous node distribution. By assuming the knowledge of node location, we first proposed a transmission strategy to ensure the progress of data packets toward their final destinations. Then the average packet progress for a transmission range universal for all nodes is derived, which is accordingly used to determine the optimal transmission range that gives the maximum efficiency of energy consumption. Different from some previous work, our analysis does not make the assumption of large nodal density in the wireless ad hoc …
Design And Implementation Of A Collaboration Web-Services System, Wenjun Wu, Geoffrey C. Fox, Hasan Bulut, Ahmet Uyar, Harun Altay
Design And Implementation Of A Collaboration Web-Services System, Wenjun Wu, Geoffrey C. Fox, Hasan Bulut, Ahmet Uyar, Harun Altay
Electrical Engineering and Computer Science - All Scholarship
Conference control has been studied for years but most researches focus on homogenous collaboration. There is no conference control framework for integration of multiple collaboration systems such as H.323, SIP and AccessGrid. In this paper we present a web-services based scalable conference control framework for such a heterogeneous collaboration system. Based on this framework, we implemented a prototype system to verify and refine our framework. This system can support various conferencing endpoints and communities.
Sensor Fusion For Video Surveillance, Lauro Snidaro, Gian Luca Foresti, Ruixin Niu, Pramod K. Varshney
Sensor Fusion For Video Surveillance, Lauro Snidaro, Gian Luca Foresti, Ruixin Niu, Pramod K. Varshney
Electrical Engineering and Computer Science - All Scholarship
In this paper, a multisensor data fusion system for object tracking is presented. It is able to track in real-time multiple targets in outdoor environments. The system can take advantage of the redundant information coming from different sensors monitoring the same scene. The measurements (positions of the targets) obtained from the available sources are fused together to obtain a more accurate estimate. Data fusion is performed considering sensor reliability at every time instant. A confidence measure has been employed to weight sensor data in the fusion process. Compared to single camera systems, the adopted approach has produced more accurate and …
Making Svg A Web Service In A Message-Based Mvc Architecture, Xiaohong Qiu, Shrideep Pallickara, Ahmet Uyar
Making Svg A Web Service In A Message-Based Mvc Architecture, Xiaohong Qiu, Shrideep Pallickara, Ahmet Uyar
Electrical Engineering and Computer Science - All Scholarship
We reformulate Scalable Vector Graphics browser in a Web Service architecture separating the rendering from the W3C DOM processing of events. We describe this in a message-based Model-View-Controller (M-MVC) architecture and implement it with a powerful publish-subscribe messaging infrastructure. A Web Services oriented architecture with services loosely coupled by the exchange of messages is becoming an increasingly important feature in the deployment of Internet applications. The broad applicability of this approach includes enterprise software, e-Learning, e-Science and e-Business. Our work provides a general framework for integrating Desktop and Web Service applications. We summarize the performance results from detailed tests of …
Design And Implementation Of Audio/Video Collaboration System Based On Publish/Subscribe Event Middleware, Geoffrey C. Fox, Wenjun Wu, Ahmet Uyar, Hasan Bulut
Design And Implementation Of Audio/Video Collaboration System Based On Publish/Subscribe Event Middleware, Geoffrey C. Fox, Wenjun Wu, Ahmet Uyar, Hasan Bulut
Electrical Engineering and Computer Science - All Scholarship
In this paper we present our A/V collaboration system based on our XGSP collaboration framework and NaradaBrokering messaging middleware. Using publish/subscribe event model, this system can provide videoconferencing services to heterogeneous endpoints such as H.323, SIP and Access Grid. This paper discusses the common a/v collaboration model shared by all kinds of A/V conferencing clients and introduces the details about how to implement such a model based on publish/subscribe event middleware.
An Efficient Scheme For Aggregation And Presentation Of Network Performance, Gurhan Gunduz, Shrideep Pallickara, Geoffrey C. Fox
An Efficient Scheme For Aggregation And Presentation Of Network Performance, Gurhan Gunduz, Shrideep Pallickara, Geoffrey C. Fox
Electrical Engineering and Computer Science - All Scholarship
The Internet is presently being used to support increasingly complex interaction models as a result of more and more applications, services and frameworks becoming network centric. Efficient utilization of network and networked resources is of paramount importance. Network performance gathering is a precursor to any scheme that seeks to provide adaptive routing capabilities for interactions. In this paper we present a network performance aggregation framework that is extensible and appropriate for distributed messaging systems that span multiple realms, disparate communication protocols and support different applications.
Privacy-Preserving Collaborative Filtering Using Randomized Perturbation Techniques, Huseyin Polat, Wenliang Du
Privacy-Preserving Collaborative Filtering Using Randomized Perturbation Techniques, Huseyin Polat, Wenliang Du
Electrical Engineering and Computer Science - All Scholarship
Collaborative Filtering (CF) techniques are becoming increasingly popular with the evolution of the Internet. E-commerce sites use CF systems to suggest products to customers based on like-minded customers' preferences. People use CF systems to cope with information overload. To conduct collaborative filtering, data from customers are needed. However, collecting high quality data from customers is not an easy task because many customers are so concerned about their privacy that they might decide to give false information. CF systems using these data might produce inaccurate recommendations. We propose a randomized perturbation technique to protect users' privacy while still producing accurate recommendations. …
Interacting Data Services For Distributed Earthquake Modeling, Marlon Pierce, Choonhan Youn, Geoffrey C. Fox
Interacting Data Services For Distributed Earthquake Modeling, Marlon Pierce, Choonhan Youn, Geoffrey C. Fox
Electrical Engineering and Computer Science - All Scholarship
We present XML schemas and our design for related data services for describing faults and surface displacements, which we use within earthquake modeling codes. These data services are implemented using a Web services approach and are incorporated in a portal architecture with other, general purpose services for application and file management. We make use of many Web services standards, including WSDL and SOAP, with specific implementations in Java. We illustrate how these data models and services may be used to build distributed, interacting applications through data flow.
Balancing The Performance Of A Sensor Network Using An Ant System, Rajani Muraleedharan, Lisa Ann Osadciw
Balancing The Performance Of A Sensor Network Using An Ant System, Rajani Muraleedharan, Lisa Ann Osadciw
Electrical Engineering and Computer Science - All Scholarship
In a sensor network consisting of both wired and wireless links, the nodes sense, collect and distribute dynamic information from one sensor to the other. Energy consumption is a key issue in the sensor’s communications since many use battery power, which is limited. The sensors also have limited memory and functionality to support communications. Therefore, there is a need to balance energy usage with obtaining the shortest communication distance. This paper presents a novel approach to selecting message routes using an ant system. Parameters controlling the convergence of the ant system are analyzed in terms of wired and wireless networks.
A Transport Framework For Distributed Brokering Systems, Shrideep Pallickara, Geoffrey C. Fox, John Yin, Gurham Gunduz, Hongbin Liu, Ahmet Uyar, Mustafa Varank
A Transport Framework For Distributed Brokering Systems, Shrideep Pallickara, Geoffrey C. Fox, John Yin, Gurham Gunduz, Hongbin Liu, Ahmet Uyar, Mustafa Varank
Electrical Engineering and Computer Science - All Scholarship
Increasingly, services need to interact with a wide spectrum of devices with varying networking capabilities. Services hosted on a messaging infrastructure need to optimally utilize and exploit the conditions that exist within the local networks. The messaging infrastructure must manage the communication between external resources, services and clients to achieve the highest possible system performance and reliability. In this paper we suggest that a transport framework needs to be incorporated into the messaging infrastructure hosting the services. We base our investigations in the context of the NaradaBrokering system.
Building Problem Solving Environments With Application Web Service Toolkits, Choonhan Youn, Marlon Pierce, Geoffrey C. Fox
Building Problem Solving Environments With Application Web Service Toolkits, Choonhan Youn, Marlon Pierce, Geoffrey C. Fox
Electrical Engineering and Computer Science - All Scholarship
Application portals, or Problem Solving Environments (PSEs), provide user environments that simplify access and integrate various distributed computational services for scientists working on particular classes of problems. Specific application portals are typically built on common sets of core services, so reusability of these services is a key problem in PSE development. In this paper we address the reusability problem by presenting a set of core services built using the Web services model and application metadata services that can be used to build science application front ends out of these core services.
An Adaptive Qos Routing Protocol With Dispersity For Ad-Hoc Networks, Youngki Hwang, Pramod Varshney
An Adaptive Qos Routing Protocol With Dispersity For Ad-Hoc Networks, Youngki Hwang, Pramod Varshney
Electrical Engineering and Computer Science - All Scholarship
In this paper, we present the design and simulation of a bandwidth constrained multiple path on-demand routing protocol for ad-hoc networks to support end-to-end Quality of Service, which is known as the Adaptive Dispersity QoS Routing (ADQR) Protocol. We propose a route discovery algorithm to find multiple disjoint paths with longerlived connections, where each path also specifies associated network resource information. This provides an efficient approach for network resource reservation combined with data dispersion and for route maintenance. A longerlived path generally involves less route maintenance, resulting in an increase of bandwidth utilization. We propose a route maintenance algorithm to …
Sensor Communication Networks Using Swarming Intelligence, Rajani Muraleedharan, Lisa Ann Osadciw
Sensor Communication Networks Using Swarming Intelligence, Rajani Muraleedharan, Lisa Ann Osadciw
Electrical Engineering and Computer Science - All Scholarship
Energy consumption is currently a key issue in research for future sensor networks. This paper presents a novel approach to sensor network routing based on energy consumption. The unique routing algorithm uses swarm intelligence, which is computationally efficient.