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An Efficient Pir Construction Using Trusted Hardware, Yanjiang Yang, Xuhua Ding, Robert H. Deng, Feng Bao Sep 2008

An Efficient Pir Construction Using Trusted Hardware, Yanjiang Yang, Xuhua Ding, Robert H. Deng, Feng Bao

Research Collection School Of Computing and Information Systems

For a private information retrieval (PIR) scheme to be deployed in practice, low communication complexity and low computation complexity are two fundamental requirements it must meet. Most existing PIR schemes only focus on the communication complexity. The reduction on the computational complexity did not receive the due treatment mainly because of its O(n) lower bound. By using the trusted hardware based model, we design a novel scheme which breaks this barrier. With constant storage, the computation complexity of our scheme, including offline computation, is linear to the number of queries and is bounded by after optimization.

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Distinguishing Between Fe And Ddos Using Randomness Check, Hyundo Park, Peng Li, Debin Gao, Heejo Lee, Robert H. Deng Sep 2008

Distinguishing Between Fe And Ddos Using Randomness Check, Hyundo Park, Peng Li, Debin Gao, Heejo Lee, Robert H. Deng

Research Collection School Of Computing and Information Systems

Threads posed by Distributed Denial of Service (DDoS) attacks are becoming more serious day by day. Accurately detecting DDoS becomes an important and necessary step in securing a computer network. However, Flash Event (FE), which is created by legitimate requests, shares very similar characteristics with DDoS in many aspects and makes it hard to be distinguished from DDoS attacks. In this paper, we propose a simple yet effective mechanism called FDD (FE and DDoS Distinguisher) to distinguish FE and DDoS. To the best of our knowledge, this is the first effective and practical mechanism that distinguishes FE and DDoS attacks. …

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A Heuristic Method For Job-Shop Scheduling With An Infinite Wait Buffer: From One-Machine To Multi-Machine Problems, Z. J. Zhao, J. Kim, M. Luo, Hoong Chuin Lau, S. S. Ge Sep 2008

A Heuristic Method For Job-Shop Scheduling With An Infinite Wait Buffer: From One-Machine To Multi-Machine Problems, Z. J. Zhao, J. Kim, M. Luo, Hoong Chuin Lau, S. S. Ge

Research Collection School Of Computing and Information Systems

Through empirical comparison of classical job shop problems (JSP) with multi-machine consideration, we find that the objective to minimize the sum of weighted tardiness has a better wait property compared with the objective to minimize the makespan. Further, we test the proposed Iterative Minimization Micro-model (IMM) heuristic method with the mixed integer programming (MIP) solution by CPLEX. For multi-machine problems, the IMM heuristic method is faster and achieves a better solution. Finally, for a large problem instance with 409 jobs and 30 types of machines, IMM-heuristic method is compared with ProModel and we find that the heuristic method is slightly …

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Do Online Reviews Affect Product Sales? The Role Of Reviewer Characteristics And Temporal Effects, Nan Hu, Ling Liu, Jennifer Zhang Sep 2008

Do Online Reviews Affect Product Sales? The Role Of Reviewer Characteristics And Temporal Effects, Nan Hu, Ling Liu, Jennifer Zhang

Research Collection School Of Computing and Information Systems

Online product reviews provided by consumers who previously purchased products have become a major information source for consumers and marketers regarding product quality. This study extends previous research by conducting a more compelling test of the effect of online reviews on sales. In particular, we consider both quantitative and qualitative aspects of online reviews, such as reviewer quality, reviewer exposure, product coverage, and temporal effects. Using transaction cost economics and uncertainty reduction theories, this study adopts a portfolio approach to assess the effectiveness of the online review market. We show that consumers understand the value difference between favorable news and …

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Relative Importance, Specific Investment And Ownership In Interorganizational Systems., Kunsoo Han, Robert J. Kauffman, Barrie R. Nault Sep 2008

Relative Importance, Specific Investment And Ownership In Interorganizational Systems., Kunsoo Han, Robert J. Kauffman, Barrie R. Nault

Research Collection School Of Computing and Information Systems

Implementation and maintenance of interorganizational systems (IOS) require investments by all the participating firms. Compared with intraorganizational systems, however, there are additional uncertainties and risks. This is because the benefits of IOS investment depend not only on a firm's own decisions, but also on those of its business partners. Without appropriate levels of investment by all the firms participating in an IOS, they cannot reap the full benefits. Drawing upon the literature in institutional economics, we examine IOS ownership as a means to induce value-maximizing noncontractible investments. We model the impact of two factors derived from the theory of incomplete …

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Cascade Rsvm In Peer-To-Peer Network, Hock Hee Ang, Vivekanand Gopalkrishnan, Steven C. H. Hoi, Wee Keong Ng Sep 2008

Cascade Rsvm In Peer-To-Peer Network, Hock Hee Ang, Vivekanand Gopalkrishnan, Steven C. H. Hoi, Wee Keong Ng

Research Collection School Of Computing and Information Systems

The goal of distributed learning in P2P networks is to achieve results as close as possible to those from centralized approaches. Learning models of classification in a P2P network faces several challenges like scalability, peer dynamism, asynchronism and data privacy preservation. In this paper, we study the feasibility of building SVM classifiers in a P2P network. We show how cascading SVM can be mapped to a P2P network of data propagation. Our proposed P2P SVM provides a method for constructing classifiers in P2P networks with classification accuracy comparable to centralized classifiers and better than other distributed classifiers. The proposed algorithm …

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Enhancing The Development Process With Wikified Widgets, Gary Gotchel Aug 2008

Enhancing The Development Process With Wikified Widgets, Gary Gotchel

Regis University Student Publications (comprehensive collection)

Wikis are now merging with other applications. Structured wikis, also known as application wikis, have evolved in recent years. This second generation has embedded applications into the wiki, which are used to structure access to the wiki repository's otherwise unstructured content. This paper investigates the other possible approach to merging wikis with applications. It researches the utility of embedding wiki functionality into common applications. Utility will be measured by the benefits to the software development process offered by this approach. I introduce a new term, wikified widget, to describe a GUI component that provides structured access to a wiki repository …

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Development Of A Physician Profiling Data Mart, Connie Chambers Aug 2008

Development Of A Physician Profiling Data Mart, Connie Chambers

Regis University Student Publications (comprehensive collection)

Hospitals and medical centers participate in a physician profiling process. This process is important to ensure that physicians are providing safe care and to comply with regulations. One medical center was struggling with the ongoing generation of physician performance reports that were an important part of the profiling process. A design research project was undertaken to demonstrate that an Access-based data mart could successfully streamline this report generating process. The research also demonstrated the need to eliminate excessive detail and deliver highly summarized reports. In addition, the research provided thorough documentation of the entire data mart development approach. This documentation …

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Implementation Of The Metadata Elements Of The Inspire Directive, Fiona Lawlor Aug 2008

Implementation Of The Metadata Elements Of The Inspire Directive, Fiona Lawlor

Regis University Student Publications (comprehensive collection)

The INSPIRE Directive entered into force in 2007. The INSPIRE (Infrastructure for Spatial Information in Europe) initiative seeks to set in place mechanisms for sharing spatial data across Europe. Metadata is one of these mechanisms: to enable discovery and to act as an information source about spatial data resources. This project examines the implementation of spatial data metadata in Ireland. Using an Irish public service organisation as a case study, the project examines how metadata creation and presentation could be optimised to provide the best value for the end user. This project also examines database tools that can be leveraged …

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Improving Live Sequence Chart To Automata Transformation For Verification, Rahul Kumar, Eric G. Mercer Aug 2008

Improving Live Sequence Chart To Automata Transformation For Verification, Rahul Kumar, Eric G. Mercer

Faculty Publications

This paper presents a Live Sequence Chart (LSC) to automata transformation algorithm that enables the verification of communication protocol implementations. Using this LSC to automata transformation a communication protocol implementation can be verified using a single verification run as opposed to previous techniques that rely on a three stage verification approach. The novelty and simplicity of the transformation algorithm lies in its placement of accept states in the automata generated from the LSC. We present in detail an example of the transformation as well as the transformation algorithm. Further, we present a detailed analysis and an empirical study comparing the …

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Biologically Relevant Multiple Sequence Alignment, Hyrum D. Carroll Aug 2008

Biologically Relevant Multiple Sequence Alignment, Hyrum D. Carroll

Theses and Dissertations

Researchers use multiple sequence alignment algorithms to detect conserved regions in genetic sequences and to identify drug docking sites for drug development. In this dissertation, a novel algorithm is presented for using physicochemical properties to increase the accuracy of multiple sequence alignments. Secondary structures are also incorporated in the evaluation function. Additionally, the location of the secondary structures is assimilated into the function. Multiple properties are combined with weights, determined from prediction accuracies of protein secondary structures using artificial neural networks. A new metric, the PPD Score is developed, that captures the average change in physicochemical properties. Using the physicochemical …

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Recommendations For Applying Security-Centric Technology Utilizing A Layered Approach In The Era Of Ubiquitous Computing: (A Guide For The Small Business Enterprise)., Yevetta Gibson Aug 2008

Recommendations For Applying Security-Centric Technology Utilizing A Layered Approach In The Era Of Ubiquitous Computing: (A Guide For The Small Business Enterprise)., Yevetta Gibson

Regis University Student Publications (comprehensive collection)

The purpose of this work is to advise and assist Small Business in applying security centric technology to better manage and secure their information assets. Computer Crimes and Incursions are growing exponentially, in complexity, and in their sinister application. In the face of this onslaught small businesses, indeed organizations everywhere, need to accept this as a business constant or reality, identify the threats, acknowledge the vulnerabilities, and make plans to meet these challenges.

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An Infrastructure For Performance Measurement And Comparison Of Information Retrieval Solutions, Gary Saunders Aug 2008

An Infrastructure For Performance Measurement And Comparison Of Information Retrieval Solutions, Gary Saunders

Theses and Dissertations

The amount of information available on both public and private networks continues to grow at a phenomenal rate. This information is contained within a wide variety of objects, including documents, e-mail archives, medical records, manuals, pictures and music. To be of any value, this data must be easily searchable and accessible. Information Retrieval (IR) is concerned with the ability to find and gain access to relevant information. As electronic data repositories continue to proliferate, so too, grows the variety of methods used to locate and access the information contained therein. Similarly, the introduction of innovative retrieval strategies—and the optimization of …

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Autonomous And Intelligent Radio Switching, Quiyi Duan Aug 2008

Autonomous And Intelligent Radio Switching, Quiyi Duan

Theses and Dissertations

With the proliferation of mobile applications and the abundance of wireless devices, it is increasingly common for devices to support multiple radios. When two devices are communicating they should choose the best available radio based on user preference and application requirements. This type of “radio switching” should happen automatically, so that the system optimizes performance dynamically. To achieve this objective, we design an Autonomous and Intelligent Radio Switching (AIRS) system to leverage the radio heterogeneity common in today's wireless devices. The AIRS system consists of three key components. First, we design a radio preference evaluation module to dynamically select the …

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Multi-Class Classification For Identifying Jpeg Steganography Embedding Methods, Benjamin M. Rodriguez Ii Aug 2008

Multi-Class Classification For Identifying Jpeg Steganography Embedding Methods, Benjamin M. Rodriguez Ii

Theses and Dissertations

Over 725 steganography tools are available over the Internet, each providing a method for covert transmission of secret messages. This research presents four steganalysis advancements that result in an algorithm that identifies the steganalysis tool used to embed a secret message in a JPEG image file. The algorithm includes feature generation, feature preprocessing, multi-class classification and classifier fusion. The first contribution is a new feature generation method which is based on the decomposition of discrete cosine transform (DCT) coefficients used in the JPEG image encoder. The generated features are better suited to identifying discrepancies in each area of the decomposed …

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Keeping Abreast Of Quantum News: Quantum Computing On The Web And In The Literature, Jill Cirasella Aug 2008

Keeping Abreast Of Quantum News: Quantum Computing On The Web And In The Literature, Jill Cirasella

Publications and Research

This appendix describes tools that can help you track developments in quantum computing.

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Historical Bibliography Of Quantum Computing, Jill Cirasella Aug 2008

Historical Bibliography Of Quantum Computing, Jill Cirasella

Publications and Research

This bibliographic essay reviews seminal papers in quantum computing. Although quantum computing is a young science, its researchers have already published thousands of noteworthy articles, far too many to list here. Therefore, this appendix is not a comprehensive chronicle of the emergence and evolution of the field but rather a guided tour of some of the papers that spurred, formalized, and furthered its study.

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On Autonomous Multi-Agent Control In Wilderness Search And Rescue: A Mixed Initiative Approach, Benjamin C. Hardin Aug 2008

On Autonomous Multi-Agent Control In Wilderness Search And Rescue: A Mixed Initiative Approach, Benjamin C. Hardin

Theses and Dissertations

Searching for lost people in a Wilderness Search and Rescue (WiSAR) scenario is a task that can benefit from large numbers of agents, some of whom may be robotic. These agents may have differing levels of autonomy, determined by the set of tasks they are performing. In addition, the level of autonomy that results in the best performance may change due to varying workload or other factors. Allowing a supervisor and a searcher to jointly decide the correct level of autonomy for a given situation (“mixed initiative”) results in better overall performance than giving an agent absolute control over their …

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Tcruzikb: Enabling Complex Queries For Genomic Data Exploration, Pablo N. Mendes, Bobby Mcknight, Amit P. Sheth, Jessica C. Kissinger Aug 2008

Tcruzikb: Enabling Complex Queries For Genomic Data Exploration, Pablo N. Mendes, Bobby Mcknight, Amit P. Sheth, Jessica C. Kissinger

Kno.e.sis Publications

We developed a novel analytical environment to aid in the examination of the extensive amount of interconnected data available for genome projects. Our focus is to enable flexibility and abstraction from implementation details, while retaining the expressivity required for post-genomic research. To achieve this goal, we associated genomics data to ontologies and implemented a query formulation and execution environment with added visualization capabilities. We use ontology schemas to guide the user through the process of building complex queries in a flexible Web interface. Queries are serialized in SPARQL and sent to servers via Ajax. A component for visualization of the …

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Text Analytics For Semantic Computing - The Good, The Bad And The Ugly, Meenakshi Nagarajan, Cartic Ramakrishnan, Amit P. Sheth Aug 2008

Text Analytics For Semantic Computing - The Good, The Bad And The Ugly, Meenakshi Nagarajan, Cartic Ramakrishnan, Amit P. Sheth

Kno.e.sis Publications

This tutorial was give at the Second IEEE International Conference on Semantic Computing Santa Clara, CA, USA - August 4-7, 2008.

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Subcellular Structure Modeling And Tracking For Cell Dynamics Study, Quan Wen Aug 2008

Subcellular Structure Modeling And Tracking For Cell Dynamics Study, Quan Wen

Computer Science and Engineering Dissertations - Archive

The introduction of sensitive and fast electronic imaging devices and the development of biological methods to tag proteins of interest by green fluorescent proteins (GFP) have made a full understanding of live cell dynamics achievable. With the latest hardware technology, such as high speed laser scanning confocal Microscopy (LSCM), it has now become critical to develop automatic quantitative data analysis tools to keep pace with and to fully exploit the functionalities of state-of-the-art hardware. One task of such tools is the motility analysis of subcellular structures. This dissertation provides a series of computational approaches for studying subcellular structure motility. Firstly, …

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Enhanced Bioinformatics Data Modeling Concepts And Their Use In Querying And Integration, Feng Ji Aug 2008

Enhanced Bioinformatics Data Modeling Concepts And Their Use In Querying And Integration, Feng Ji

Computer Science and Engineering Dissertations - Archive

In bioinformatics research, scientists usually face the problems of modeling complex data types and integrating diverse resources. Traditional data models such as EER lack the expressing power to capture many characteristics that are common in bioinformatics data. We first propose extensions to the ER model that allow accurate representation of many of these characteristics. We then utilize these concepts in an integrative system to provide an easy-to-use interface for biologists to construct queries. Our research utilizes the enhanced conceptual modeling concepts to create a prototype mediator for querying multiple data sources. The various relationships between different biological entities are all …

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Location Privacy In Sensor Networks Against A Global Eavesdropper, Kiran K. Mehta Aug 2008

Location Privacy In Sensor Networks Against A Global Eavesdropper, Kiran K. Mehta

Computer Science and Engineering Theses - Archive

While many protocols for sensor network security provide con dentiality for the content of messages, contextual information usually remains exposed. Such contextual information can be exploited by an adversary to derive sensitive information such as the locations of monitored objects and data sinks in the eld. Attacks on these components can signi cantly undermine network applications. The existing techniques defend the leakage of location information only from an adversary who sees only local network tra c. However, a stronger adversary, the global eavesdrop- per, is realistic and can defeat all existing techniques. This paper rst formalizes the location privacy issues …

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Automated Integration Of Biomedical Information For The Support Of Genome-Wide Association Studies, Abhijit R. Tendulkar Aug 2008

Automated Integration Of Biomedical Information For The Support Of Genome-Wide Association Studies, Abhijit R. Tendulkar

Computer Science and Engineering Theses - Archive

Genome-wide association studies of the genetic underpinnings of complex phenotypes, and human diseases in particular, have been steadily gaining momentum over the past several years. Yet, the number of polymorphic sites in the human genome, including, but not limited to, Single Nucleotide Polymorphisms (SNPs) is so large that identifying the combination of these few which have a significant effect on the condition of interest remains an overwhelming task. The goal of this thesis work was to identify biologically and medically relevant SNPs which could be the best possible candidates for further association studies. In this thesis we present a new …

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Congestion Control For Networks In Challenged Environments, Guohua Zhang Aug 2008

Congestion Control For Networks In Challenged Environments, Guohua Zhang

Computer Science and Engineering Dissertations - Archive

Congestion occurs when resource demands exceed the capacity of a network. The goal of congestion control is to use the network as efficiently as possible. While extensive efforts have been devoted to providing optimization based, distributed congestion control schemes for efficient bandwidth utilization and fair allocation in the Internet and wireless networks, little consideration was given to congestion control for networks in challenged environments, specifically for networks with time-varying link capacities and networks that intermittently communicate. In this dissertation, we explore optimal congestion control strategies for such networks based on optimization techniques and repeated game theory. For networks with time …

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High Performance Cluster And Grid Computing Solutions For Science, Umeshkumar Ashok Keswani Aug 2008

High Performance Cluster And Grid Computing Solutions For Science, Umeshkumar Ashok Keswani

Computer Science and Engineering Theses - Archive

Computing for science has very peculiar requirements. There is an enormous amount of data to analyze to get useful information. This requires greater computing power, huge data storage and high-capacity network. High Performance Computing (HPC) is the perfect solution that satisfies these requirements. Here, we look at two high performance implementations that provide useful solutions to computing problems in science, making possible scientific experiments and discoveries that otherwise would not have been possible.

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Computational Analysis Of Variability Of Recombination In Mice, Vishnukumar Galigekere Nagabhushana Aug 2008

Computational Analysis Of Variability Of Recombination In Mice, Vishnukumar Galigekere Nagabhushana

Computer Science and Engineering Theses - Archive

Rapid advances in engineering and technology have fueled research in areas such as molecular biology and genetics to a new level and thus have given birth to multidisciplinary fields like bioinformatics and computational biology. These fields involve the application of one's expertise in one or more areas including computer science, information science, statistics, chemistry and mathematics to solve problems related to biology in general and molecular biology and genetics in particular. It is a challenging research area which requires one to grasp diverse fields at almost equal rigor and at the same time provides new insights into the fascinating field …

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The Dynamics Of Salsa: A Structured Approach To Large-Scale Anonymity, Safwan Mahmud Khan Aug 2008

The Dynamics Of Salsa: A Structured Approach To Large-Scale Anonymity, Safwan Mahmud Khan

Computer Science and Engineering Theses - Archive

Anonymity provides a technical solution for protecting one's online privacy. Highly distributed peer-to-peer (P2P) anonymous systems should have better distribution of trust and more scalability than centralized approaches, but existing systems are vulnerable to attacks as they require nodes to have global knowledge of the system. To overcome these problems and to provide more secure, distributed organization for P2P anonymity systems, prior work proposed the Salsa system. Salsa is designed to select nodes to be used in anonymous circuits randomly from the full set of nodes, even though each node has knowledge of only a small subset of the network. …

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Mutual Information Based Non-Rigid Image Registration Using Adaptive Grid Generation: Gpu Implementation And Application To Breast Mri, Mei Yi Chu Aug 2008

Mutual Information Based Non-Rigid Image Registration Using Adaptive Grid Generation: Gpu Implementation And Application To Breast Mri, Mei Yi Chu

Computer Science and Engineering Dissertations - Archive

In this dissertation a new approach for non-rigid image registration using mutual information is introduced. A fast method for non-rigid registration is developed by adjusting divergence and curl of an intermediate vector field from which the deformation field is computed using finite difference method. The similarity measure mutual information is employed in the gradient-based cost minimization (or mutual information maximization) of the registration. The huge amount of data associated with MRI is handled by fully automated algorithm optimized with a multi-resolution topology preserving regridding scheme. The adaptive grid system naturally distributes more grids to deprived areas. The positive monitor function …

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Mediatability: Estimating The Degree Of Human Involvement In Xml Schema Mediation, Karthik Gomadam, Ajith Harshana Ranabahu, Lakshmish Ramaswamy, Amit P. Sheth, Kunal Verma Aug 2008

Mediatability: Estimating The Degree Of Human Involvement In Xml Schema Mediation, Karthik Gomadam, Ajith Harshana Ranabahu, Lakshmish Ramaswamy, Amit P. Sheth, Kunal Verma

Kno.e.sis Publications

Mediation and integration of data are significant challenges because the number of services on the Web, and heterogeneities in their data representation, continue to increase rapidly. To address these challenges we introduce a new measure, mediatability, which is a quantifiable and computable metric for the degree of human involvement in XML schema mediation. We present an efficient algorithm to compute mediatability and an experimental study to analyze how semantic annotations affect the ease of mediating between two schemas. We validate our approach by comparing mediatability scores generated by our system with user-perceived difficulty. We also evaluate the scalability of our …

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