George Mason University

Displaying 1-40 of 122 results

  • White Papers // May 2014

    Constructing and Analyzing Criminal Networks

    Analysis of criminal social graph structures can enable them to gain valuable insights into how these communities are organized. Such as, how large scale and centralized these criminal communities are currently? While these types of analysis have been completed in the past, the authors wanted to explore how to construct...

    Provided By George Mason University

  • White Papers // Jan 2014

    Accessing Big Data in the Cloud Using Mobile Devices

    The amount of data generated annually over the internet has exceeded the zeta-byte levels. Processing data with such high volume far exceeds the computational capabilities of today's datacenters and computers, giving rise to the term big data. The amount of data acquired, stored, and processed annually over the Internet has...

    Provided By George Mason University

  • White Papers // Nov 2013

    The Anatomy of Mapreduce Jobs, Scheduling, and Performance Challenges

    Hadoop is a leading open source tool that supports the realization of the big data revolution and is based on Google's MapReduce pioneering work in the field of ultra large amount of data storage and processing. Instead of relying on expensive proprietary hardware, Hadoop clusters typically consist of hundreds or...

    Provided By George Mason University

  • White Papers // Sep 2013

    Reducing Power in Hybrid MRAM Cache Through Iterative Low Voltage Writes

    As technology scales down, the static leakage power of SRAM based cache becomes a more critical source of dissipated power, particularly for large last level cache where leakage power is high. The emerging non-volatile Spin Transfer Torque (STT-RAM) is a nominee to substitute SRAM due to low leakage power. However,...

    Provided By George Mason University

  • White Papers // Jun 2013

    OCTANE: Open Car Testbed and Network Experiments Bringing Cyber-Physical Security Research to Researchers and Students

    Security research and teaching using cyber-physical systems (e.g., automotive networks) is challenging because of the need to replicate the interactions between the hardware components and the control software of the systems. These interactions are challenging to replicate because of the dynamic inputs in real-world environments that cause various interactions of...

    Provided By George Mason University

  • White Papers // Apr 2013

    IOCheck: A Framework to Enhance the Security of I/O Devices at Runtime

    Securing hardware is the foundation for implementing a secure system. However, securing hardware devices remains an open research problem. In this paper, the authors present IOCheck, a framework to enhance the security of I/O devices at runtime. It leverages System Management Mode (SMM) to quickly check the integrity of I/O...

    Provided By George Mason University

  • White Papers // Apr 2013

    MOTAG: Moving Target Defense Against Internet Denial of Service Attacks

    Distributed Denial of Service (DDoS) attacks still pose a significant threat to critical infrastructure and Internet services alike. In this paper, the authors propose MOTAG, a moving target defense mechanism that secures service access for authenticated clients against flooding DDoS attacks. MOTAG employs a group of dynamic packet indirection proxies...

    Provided By George Mason University

  • White Papers // Jan 2013

    Billing Attacks on SIP-Based VoIP Systems

    Billing is fundamental to any commercial VoIP services and it has direct impact on each individual VoIP subscriber. One of the most basic requirements of any VoIP billing function is that it must be reliable and trustworthy. From the VoIP subscriber's perspective, VoIP billing should only charge them for the...

    Provided By George Mason University

  • White Papers // Jan 2013

    Out-of-the-Box Monitoring of VM-Based High-Interaction Honeypots

    Honeypot has been an invaluable tool for the detection and analysis of network-based attacks by either human intruders or automated malware in the wild. The insights obtained by deploying honeypots, especially high-interaction ones, largely rely on the monitoring capability on the honeypots. In practice, based on the location of sensors,...

    Provided By George Mason University

  • White Papers // Dec 2012

    Concurrent Object-Oriented Development with Behavioral Design Patterns

    The development of concurrent applications is challenging because of the complexity of concurrent designs and the hazards of concurrent programming. Architectural modeling using the Unified Modeling Language (UML) can support the development process, but the problem of mapping the model to a concurrent implementation remains. This paper addresses this problem...

    Provided By George Mason University

  • White Papers // Dec 2012

    Queuing Network Models to Predict the Completion Time of the Map Phase of MapReduce Jobs

    Big data processing is generally defined as a situation when the size of the data itself becomes part of the computational problem. This paper has made divide-and-conquer type algorithms implemented in clusters of multi-core CPUs in Hadoop/MapReduce environments an important data processing tool for many organizations. Jobs of various kinds,...

    Provided By George Mason University

  • White Papers // Oct 2012

    Comprehensive Evaluation of High-Speed and Medium-Speed Implementations of Five SHA-3 Finalists Using Xilinx and Altera FPGAs

    In this paper, the authors present a comprehensive comparison of all Round 3 SHA-3 candidates and the current standard SHA-2 from the point of view of hardware performance in modern FPGAs. Each algorithm is implemented using multiple architectures based on the concepts of iteration, folding, unrolling, pipelining, and circuit replication....

    Provided By George Mason University

  • White Papers // Sep 2012

    Geoprocessing on the Amazon Cloud Computing Platform - AWS

    With the continuously increment of the available amount of spatial data sets, science, industry and administration require web-based geo-information concerning storage, availability and processing. The development of Spatial Data Infrastructures (SDIs) brings about the Web-based sharing of large volumes of distributed geospatial data and computational resources. A powerful, dependable and...

    Provided By George Mason University

  • White Papers // Jul 2012

    Security Margin Evaluation of SHA-3 Contest Finalists Through SAT-Based Attacks (Extension)

    In 2007, the U.S. National Institute of Standards and Technology (NIST) announced a public contest aiming at the selection of a new standard for a cryptographic hash function. In this paper, the security margin of five SHA-3 finalists is evaluated with an assumption that attacks launched on finalists should be...

    Provided By George Mason University

  • White Papers // Jun 2012

    The Virtual Apprentice

    Over the past couple of decades, virtual humans have been attracting more and more attention. Many applications including, video games, movies, and various training and tutoring systems have benefited from work in this area. While the visual quality of virtual agents has improved dramatically, their intelligence and socialization still needs...

    Provided By George Mason University

  • White Papers // Apr 2012

    NetGator: Malware Detection Using Program Interactive Challenges

    Internet-borne threats have evolved from easy to detect denial of service attacks to zero-day exploits used for targeted exfiltration of data. Current intrusion detection systems cannot always keep-up with zero-day attacks and it is often the case that valuable data have already been communicated to an external party over an...

    Provided By George Mason University

  • White Papers // Mar 2012

    The MEERKATS Cloud Security Architecture

    MEERKATS is a novel architecture for cloud environments that elevates continuous system evolution and change as first-rate design principles. The authors' goal is to enable an environment for cloud services that constantly changes along several dimensions, toward creating an unpredictable target for an adversary. This unpredictability will both impede the...

    Provided By George Mason University

  • White Papers // Mar 2012

    Throughput Limits in Spectrum Sensing Cognitive Radio Networks Using Point Processes

    Spectrum sensing in cognitive wireless networks is important for Secondary nodes to avoid interference with the Primaries. In this paper, considering a spectrum sensing framework, the authors develop models for bounding interference levels from Secondary network to the Primary nodes. First, they assume that both networks are distributed according to...

    Provided By George Mason University

  • White Papers // Mar 2012

    Crowd Distribution and Location Preference

    Most crowd simulators focus on navigation and agents flow. In this paper, the authors present another perspective which concentrates on the overall distribution of virtual agents and uses psychological preferences for choosing goal locations. Both observation and published theory indicate that most people prefer to maintain their personal space as...

    Provided By George Mason University

  • White Papers // Jan 2012

    NSDMiner: Automated Discovery of Network Service Dependencies

    Enterprise networks today host a wide variety of network services, which often depend on each other to provide and support network-based services and applications. Understanding such dependencies is essential for maintaining the well-being of an enterprise network and its applications, particularly in the presence of network attacks and failures. In...

    Provided By George Mason University

  • White Papers // Nov 2011

    Chrome Extensions: Threat Analysis and Countermeasures

    The widely popular browser extensions now become one of the most commonly used malware attack vectors. The Google chrome browser, which implements the principles of least privileges and privilege separation by design, offers a strong security mechanism to protect malicious websites from damaging the whole browser system via extensions. In...

    Provided By George Mason University

  • White Papers // Nov 2011

    Groestl Tweaks and Their Effect on FPGA Results

    The authors have performed the first order analysis of the influence of the Round 3 tweaks in Groestl on the performance of this algorithm in FPGAs. Both Groestl-0 and the revised Groestl have been fully implemented in VHDL using two alternative architectures: quasi-pipelined and parallel. The results indicate that the...

    Provided By George Mason University

  • White Papers // Sep 2011

    Capacity Bounds in Random Wireless Networks

    The authors consider a receiving node, located at the origin, and a Poisson point process that models the locations of the desired transmitter as well as the interferers. Interference is known to be non-Gaussian in this scenario. The capacity bounds for additive non-Gaussian channels depend on not only the power...

    Provided By George Mason University

  • White Papers // Sep 2011

    An Empirical Study on Variants of TCP Over AODV Routing Protocol in MANET

    The cardinal concept of TCP development was to carry data within the network where network congestion plays a vital role to cause packet loss. On the other hand, there are several other reasons to lose packets in Mobile Ad Hoc Networks due to fading, interfaces, multi-path routing, malicious node, and...

    Provided By George Mason University

  • White Papers // Aug 2011

    Populations with Purpose

    There are currently a number of animation researchers that focus on simulating virtual crowds, but few are attempting to simulate virtual populations. Virtual crowd simulations tend to depict a large number of agents walking from one location to another as realistically as possible. The virtual humans in these crowds lack...

    Provided By George Mason University

  • White Papers // Jul 2011

    Network Security Risks Associated With IaaS in a Shared Environment

    Cloud computing offers extraordinary benefits and efficiencies to organizations. Organizations can now purchase computing resources on an as-needed basis without the overhead and costs of managing their own IT resources. However, with those efficiencies come many hurdles that must be overcome. Understanding what is going on behind the opaque wall...

    Provided By George Mason University

  • White Papers // Jun 2011

    NetGator: Malware Detection Through Program Interactive Proofs

    Exfiltration of data using internet-borne attacks has become a credible threat for organization and enterprises. History has shown that crafted targeted attacks and zero-day malware are capable of penetrating even the most sophisticated defenses. To make matters worse, intrusion detection systems that perform analysis of network traffic are dependent on...

    Provided By George Mason University

  • White Papers // Jun 2011

    Assessing Home Internet Users' Demand for Security: Will They Pay ISPs?

    One strategy for improving cyber security would be for Internet Service Providers (ISPs) to take a more active role in curtailing criminal behavior over the Internet. However, few ISPs today are offering robust security to their customers. They largely contend that home Internet users are unwilling to pay for improvements...

    Provided By George Mason University

  • White Papers // May 2011

    Guided Exploration of the Architectural Solution Space in the Face of Uncertainty

    A system's early architectural decisions impact its properties (e.g., scalability, dependability) as well as stakeholder concerns (e.g., cost, time to delivery). Choices made early on are both difficult and costly to change, and thus it is paramount that the engineer gets them "Right". This leads to a paradox, as in...

    Provided By George Mason University

  • White Papers // Apr 2011

    CapMan: Capability-Based Defense Against Multi-Path Denial of Service (DoS) Attacks in MANET

    This paper presents a capability-based security mechanism called CapMan. The authors' approach is designed to prevent Denial-of-Service (DoS) attacks on wireless communications, particularly against multi-path communication in Mobile Adhoc NETworks (MANETs). CapMan offers a mechanism for a per flow, distributed bandwidth control by all the participating nodes along multiple communication...

    Provided By George Mason University

  • White Papers // Apr 2011

    GPU-Euler: Sequence Assembly Using GPGPU

    Advances in sequencing technologies have revolutionized the field of genomics by providing cost effective and high throughput solutions. In this paper, the authors develop a parallel sequence assembler implemented on general purpose Graphic Processor Units (GPUs). The authors' work was largely motivated by a growing need in the genomic community...

    Provided By George Mason University

  • White Papers // Mar 2011

    Which Should We Try First? Ranking Information Resources Through Query Classification

    Users seeking information in distributed environments of large numbers of disparate information resources are often burdened with the task of repeating their queries for each and every resource. Invariably, some of the searched resources are more productive (yield more useful documents) than others, and it would be undoubtedly useful to...

    Provided By George Mason University

  • White Papers // Feb 2011

    Hidden Markov Process Based Dynamic Spectrum Access for Cognitive Radio

    Cognitive radio is an emerging technology for sensing and dynamic access of spectrum in mobile radio environments. It aims at dynamically allocating unused bandwidth among secondary users without causing harmful interference to the primary users. This approach, which has clear economical benefits, has recently attracted significant research effort. In this...

    Provided By George Mason University

  • White Papers // Feb 2011

    Resilient Traffic Engineering in a Transit-Edge Separated Internet Routing

    The significant growth of Internet traffic and increase of routing tables require solutions to address Internet scalability and resiliency. A possible direction is to move away from the flat legacy Internet routing to hierarchical routing, separating edge networks from transit networks. In this paper, the authors study the extended traffic...

    Provided By George Mason University

  • White Papers // Jan 2011

    Contract As Convention

    Contract theory is a curiously neglected field. While the efficiency of contract law rules has received much attention, the same cannot be said of the more basic question why contracts should be enforced. The reliance and autonomy explanations which contract theorists most frequently offer are moreover unpersuasive. Reliance theories would...

    Provided By George Mason University

  • White Papers // Jan 2011

    Enforcement Architecture and Implementation Model for Group-Centric Information Sharing

    A fundamental requirement for Secure Information Sharing (SIS) is that protection needs to extend to clients. Trusted Computing Technology provides a hardware root of trust through the Trusted Platform Module. This paper presents a super-distribution based enforcement architecture and implementation model for the group-centric SIS problem which is concerned with...

    Provided By George Mason University

  • White Papers // Jan 2011

    The Sound Of One Hand Clapping: The 2010 Merger Guidelines And The Challenge Of Judicial Adoption

    There is ample justification for the consensus view that the Horizontal Merger Guidelines have proven one of antitrust law's great successes in the grounding of antitrust doctrine within economic learning. The foundation of the Guidelines' success has been its widespread adoption by federal courts, which have embraced its rigorous underlying...

    Provided By George Mason University

  • White Papers // Jan 2011

    Does Antitrust Enforcement In High Tech Markets Benefit Consumers? Stock Price Evidence From FTC V. Intel

    Antitrust enforcement efforts in the United States and abroad have been ramped up in high-tech industries, rekindling stale and largely unresolved debates concerning the appropriate role of antitrust enforcement in high-tech markets. Like the previous enforcement actions against Microsoft, and likely enforcement efforts in the future against similarly situated business...

    Provided By George Mason University

  • White Papers // Jan 2011

    RandSys: Thwarting Code Injection Attacks With System Service Interface Randomization

    Code injection attacks are a top threat to today's Internet. With zero-day attacks on the rise, randomization techniques have been introduced to diversify software and operation systems of networked hosts so that attacks that succeed on one process or one host cannot succeed on others. Two most notable system-wide randomization...

    Provided By George Mason University

  • White Papers // Jan 2011

    Life After Self-Healing: Assessing Post-Repair Program Behavior

    One promising technique for defending software systems against vulnerabilities involve the use of self-healing. Such efforts, however, carry a great deal of risk because they largely bypass the cycle of human-driven patching and testing used to vet both vendor and internally developed patches. In particular, it is difficult to predict...

    Provided By George Mason University

  • White Papers // Jul 2009

    Spam Detection Using Clustering, Random Forests, and Active Learning

    This paper describes work in progress. The research is focused on efficient construction of effective models for spam detection. Clustering messages allows for efficient labeling of a representative sample of messages for learning a spam detection model using a Random Forest for classification and active learning for refining the classification...

    Provided By George Mason University

  • White Papers // Jul 2009

    The Heisenberg Measuring Uncertainty in Lightweight Virtualization Testbeds

    The need for large-scale experimentation testbeds involving several hundred, or even thousands, of nodes is undeniable. Testbeds including Emulab, and Deter are heavily used for both research and application testing. To scale even further and shed some of the limitations that the relative small number of physical nodes impose, researchers...

    Provided By George Mason University

  • White Papers // Oct 2009

    Visualization of Earth Science Data Using Google Earth

    With Google Earth being widely used by the general public and professionals, Virtual Globes are revolutionizing the way in which scientists conduct their research and the general public uses geospatial-related data and information. NASA Goddard Earth Science Data and Information Service Center (GES DISC) developed a service-oriented online scientific data...

    Provided By George Mason University

  • White Papers // May 2010

    Universal Multi-Factor Authentication Using Graphical Passwords

    With AO, companies are able to turn into a more industrialized model in a centralized low-cost country for the service. With this, funds can be released easily and they therefore help pay for investments in larger transformation programs. In the case of AO, companies can ask their suppliers to manage...

    Provided By George Mason University

  • White Papers // Sep 2009

    Understanding Cloud Computing: Experimentation and Capacity Planning

    Cloud computing is a relatively new concept but has its roots in many not-so-new technologies. It is a modality of computing characterized by on demand availability of resources in a dynamic and scalable fashion. This paper discusses in detail the concept of cloud computing, its advantages such as pay as...

    Provided By George Mason University

  • White Papers // Jul 2009

    A2M: Access-Assured Mobile Desktop Computing

    Continued improvements in network bandwidth, cost, and ubiquitous access are enabling service providers to host desktop computing environments to address the complexity, cost, and mobility limitations of today's personal computing infrastructure. However, distributed denial of service attacks can deny use of such services to users. The authors present A2M, a...

    Provided By George Mason University

  • White Papers // Feb 2010

    Security Policy Cognizant Module Composition

    Component-based software development and deployment is based on developing individual software modules that are composed on an as needed basis. Such modules expose the computations they provide and their dependencies on providing these computations - that results in a well known requires-provides specifications for modules. This paper provides a framework...

    Provided By George Mason University

  • White Papers // May 2010

    Model-Based System Development for Managing the Evolution of a Common Submarine Combat System

    Managing the evolution of a complex product family that is deployed and maintained in multiple variants on various platforms using traditional systems engineering tools and processes is a significant challenge. An example is managing the evolution of a common combat system across a fleet of submarines. Due to the realities...

    Provided By George Mason University

  • White Papers // Mar 2009

    Cloud Computing: Impacting Our World

    Cloud computing is distributed computer processing over a large network. The Internet is the largest cloud, and it is often drawn on network diagrams as a cloud. Cloud computing impacts the world by allowing people to access large volumes of data quicker, and impacts both the environment and human interaction....

    Provided By George Mason University

  • White Papers // Jan 2010

    An Integrated Multi-Task Inductive Database and Decision Support System VINLEN: An Initial Implementation and First Results

    A brief review of the current research on VINLEN multitask inductive database and decision support system is presented. VINLEN integrates a wide range of knowledge generation operators that given input data and/or knowledge create new knowledge. The central operator of VINLEN is a natural induction module that generates hypotheses from...

    Provided By George Mason University

  • White Papers // Aug 2009

    Analysis of Virus Spread in Wireless Sensor Networks: An Epidemic Model

    The authors of this paper study the potential threat for virus spread in Wireless Sensor Networks (WSNs). Using epidemic theory, the authors proposed a new model, called Susceptible-Infective-Recovered with Maintenance (SIR-M), to characterize the dynamics of the virus spread process from a single node to the entire network. By introducing...

    Provided By George Mason University

  • White Papers // Jul 2010

    Providing Mobile Users' Anonymity in Hybrid Network

    The authors present a novel hybrid communication protocol that guarantees mobile users' k-anonymity against a wide-range of adversaries by exploiting the capability of handheld devices to connect to both Wi-Fi and cellular networks. Unlike existing anonymity schemes, they consider all parties that can intercept communications between the mo-bile user and...

    Provided By George Mason University

  • White Papers // Jun 2009

    Do You Reward And Punish In The Way You Think Others Expect You To?

    This paper addresses three questions: When deciding on whether to reward or punish someone, how does how you think others expect you to behave affect your decision? Does it depend upon whether others expect you to reward them vs. punish them? What is the interpretation of such a causal effect?...

    Provided By George Mason University

  • White Papers // Aug 2009

    Temptation At Work: A Field Experiment On Willpower And Productivity

    Temptations are a largely unavoidable part of life. Resisting them is usually seen as a virtuous behavior. Recent research in social psychology, however, suggests that using willpower to delay gratification can detrimentally impact performance on immediately subsequent tasks. Using standard economic theory, the authors develop a model connecting willpower to...

    Provided By George Mason University

  • White Papers // Aug 2009

    Inequality-Seeking Punishment

    Inequality aversion is a key motive for punishment, with many prominent studies suggesting people use punishment to reduce or eliminate inequality. Punishment in laboratory games, however, is nearly always designed to promote equality and the marginal cost of punishment is typically non-trivially positive. As a consequence, individual preferences over punishment...

    Provided By George Mason University

  • White Papers // Aug 2009

    Does Deceptive Advertising Reduce Political Participation? Theory And Evidence

    The authors examine the effect of deceptive advertising on voting decisions in elections. They model two candidate elections in which voters are uncertain about candidates' attributes; and candidates can inform voters of their attributes by sending advertisements. They compare political campaigns with truthful advertising to campaigns in which there is...

    Provided By George Mason University

  • White Papers // Jun 2009

    Neural Responses To Sanction Threats In Two-Party Economic Exchange

    Sanctions are used ubiquitously to enforce obedience to social norms. Recent field studies and laboratory experiments have demonstrated, however, that cooperation is sometimes reduced when incentives meant to promote pro-social decisions are added to the environment. Although a variety of explanations have been suggested, the neural foundations of this effect...

    Provided By George Mason University

  • White Papers // Jan 2011

    The Sound Of One Hand Clapping: The 2010 Merger Guidelines And The Challenge Of Judicial Adoption

    There is ample justification for the consensus view that the Horizontal Merger Guidelines have proven one of antitrust law's great successes in the grounding of antitrust doctrine within economic learning. The foundation of the Guidelines' success has been its widespread adoption by federal courts, which have embraced its rigorous underlying...

    Provided By George Mason University

  • White Papers // Jan 2011

    Contract As Convention

    Contract theory is a curiously neglected field. While the efficiency of contract law rules has received much attention, the same cannot be said of the more basic question why contracts should be enforced. The reliance and autonomy explanations which contract theorists most frequently offer are moreover unpersuasive. Reliance theories would...

    Provided By George Mason University

  • White Papers // Jan 2011

    Does Antitrust Enforcement In High Tech Markets Benefit Consumers? Stock Price Evidence From FTC V. Intel

    Antitrust enforcement efforts in the United States and abroad have been ramped up in high-tech industries, rekindling stale and largely unresolved debates concerning the appropriate role of antitrust enforcement in high-tech markets. Like the previous enforcement actions against Microsoft, and likely enforcement efforts in the future against similarly situated business...

    Provided By George Mason University

  • White Papers // Oct 2010

    Deliberative Democracy And Political Ignorance

    Advocates of "Deliberative democracy" want citizens to actively participate in serious dialogue over political issues, not merely go to the polls every few years. Unfortunately, these ideals don't take into account widespread political ignorance and irrationality. Most voters neither attain the level of knowledge needed to make deliberative democracy work,...

    Provided By George Mason University

  • White Papers // Oct 2010

    Policy Reversal On Reverse Payments: Why Courts Should Not Follow The New DOJ Position On Reverse-Payment Settlements Of Pharmaceutical Patent Litigation

    In a recent policy reversal, the Department of Justice has, for the first time, pursued antitrust liability for "Reverse payment" settlements. These settlements occur in the pharmaceutical industry when brand-name and generic-drug companies settle patent-infringement litigation. In a reverse-payment settlement, the generic-drug company agrees not to enter the market for...

    Provided By George Mason University

  • White Papers // Oct 2010

    Transformation In Property And Copyright

    Copyright law grants ownership rights in "Works of authorship," and copyright disputes frequently require one to distinguish between two different ways in which a "Work of authorship" may be "Transformed". On one side of the line are changes whose end result is termed a ?derivative work, and which are therefore...

    Provided By George Mason University

  • White Papers // Oct 2010

    Employee "Free" Choice In The Mirror Of Liberty, Fairness And Social Welfare

    The publication of Richard Epstein's book, THE CASE AGAINST THE EMPLOYEE FREE CHOICE ACT provides an opportunity to reconsider the movement to displace the regime of judge-made law that had previously governed labor relationships, the purpose of the NLRA and the revolutionary implications of the effort to transform the NLRA...

    Provided By George Mason University

  • White Papers // Apr 2009

    SMP Virtualization Performance Evaluation

    Virtualization is a technology used to partition the resources of a physical computer into Virtual Machines (VMs). This is often done with the intent of increasing the utilization of a physical computer used to host VMs. Many workloads use only a part of a physical host's resources, but must run...

    Provided By George Mason University

  • White Papers // Sep 2009

    A Virtualization Architecture for In-Depth Kernel Isolation

    Recent advances in virtualization technologies have sparked a renewed interest in the use of kernel and process virtualization as a security mechanism to enforce resource isolation and management. Unfortunately, virtualization solutions incur performance overhead. The magnitude of this overhead is directly proportional to the extend of virtualization they offer: full...

    Provided By George Mason University

  • White Papers // Jul 2010

    HyperCheck: A Hardware-Assisted Integrity Monitor

    Over the past few years, virtualization has been employed to environments ranging from densely populated cloud computing clusters to home desktop computers. Security researchers embraced Virtual Machine Monitors (VMMs) as a new mechanism to guarantee deep isolation of untrusted software components. Unfortunately, their widespread adoption promoted VMMs as a prime...

    Provided By George Mason University

  • White Papers // Jul 2010

    Dynamic Cloud Management System for Monitoring and Managing Services

    As cloud computing becomes more widely adopted, the size of cloud systems will necessarily become larger. In recent years, large companies, such as Google and Amazon, have become reliant on resources and services provided by cloud computing environments. While these large corporations have most likely implemented efficient, dynamic, and scalable...

    Provided By George Mason University

  • White Papers // Jan 2010

    GeoInformation Computing & Cyberinfrastructure

    Geographic information processing is expanding in several dimensions in the past decades: 1) Earth observation, ground sensing, and other data collection techniques accelerated exponentially the capability for collecting petabytes of data on a daily basis. 2) Research in the past years produces computing intensive algorithms and models for analyzing the...

    Provided By George Mason University

  • White Papers // Aug 2010

    Energy Management for Time-Critical Energy Harvesting Wireless Sensor Networks

    As Cyber-Physical Systems (CPSs) evolve they will be increasingly relied to support time-critical monitoring and control activities. Further, many CPSs that utilizing Wireless Sensor Networking (WSN) technologies will require the use of energy harvesting methods to extend their lifetimes. For this application class, there are currently few effective models that...

    Provided By George Mason University

  • White Papers // Oct 2010

    Detection of Communities and Bridges in Weighted Networks

    Traditional graph-based clustering methods group vertices into discrete non-intersecting clusters under the assumption that each vertex can belong to only a single cluster. On the other hand, recent research on graph-based clustering methods, applied to real world networks (e.g., Protein-protein interaction networks and social networks), shows overlapping patterns among the...

    Provided By George Mason University

  • White Papers // Dec 2010

    Ruminate: A Scalable Architecture for Deep Network Analysis

    Traditionally, Network Intrusion Detection Systems (NIDS) inspect packet header and payload data for malicious content. While each system is different, most NIDS perform limited analysis on network streams and network protocols. Unfortunately, current NIDS are typically susceptible to evasion through network protocol encoding, such as base64 encoding of SMTP/MIME or...

    Provided By George Mason University

  • White Papers // Jan 2011

    RandSys: Thwarting Code Injection Attacks With System Service Interface Randomization

    Code injection attacks are a top threat to today's Internet. With zero-day attacks on the rise, randomization techniques have been introduced to diversify software and operation systems of networked hosts so that attacks that succeed on one process or one host cannot succeed on others. Two most notable system-wide randomization...

    Provided By George Mason University

  • White Papers // Jan 2010

    High Level Fusion and Predictive Situational Awareness With Probabilistic Ontologies

    The change of focus in modern warfare from individual platforms to the network has caused a concomitant shift in supporting concepts and technologies. Greater emphasis is placed on interoperability and composeability. New technologies such as SOA and semantically aware systems have come into the spotlight. This paper argues that just...

    Provided By George Mason University

  • White Papers // Apr 2009

    Building an On-Line Geospatial Analysis System With AJAX and Web Services

    Service Oriented Architecture (SOA), Web Services, Asynchronous JavaScript And XML (AJAX), and other new Web technologies have revolutionized the use of geospatial Web applications. The GeoBrain project has built a powerful online extensible and scalable geospatial analysis system based on SOA. This system utilizes Web Services and AJAX to increase...

    Provided By George Mason University

  • White Papers // May 2009

    Using Ajax for Desktop-Like Geospatial Web Application Development

    As one of key components of Web 2.0 architecture, Ajax brings web applications with more responsive, interactive, intuitive and dynamic features. With its rich combination of technologies, Ajax provides a strong foundation for the development of geospatial web applications. An Ajax-enabled and desktop-like online geospatial analysis system is built to...

    Provided By George Mason University

  • White Papers // Nov 2009

    The Israeli Ethos Of Conflict 1967-2006

    This paper focuses on a major component of the psychological repertoire that evolves during an intractable conflict - the ethos of conflict and the changes in this ethos over time. The paper presents a theoretical framework that can be used to analyze and explain changes in ethos of intractable conflict,...

    Provided By George Mason University

  • White Papers // Aug 2010

    CAROSA: A Tool for Authoring NPCs

    Certainly Non-Player Characters (NPCs) can add richness to a game environment. A world without people (or at least humanoids) seems barren and artificial. People are often a major part of the setting of a game. Furthermore, watching NPCs perform and have a life out-side of their interactions with the main...

    Provided By George Mason University

  • White Papers // Jul 2010

    Constraints-Based Complex Behavior in Rich Environments

    In order to create a system capable of planning complex, constraints-based behaviors for an agent operating in a rich environment, two complementary frameworks were integrated. Linear Temporal Logic mission planning generates controllers that are guaranteed to satisfy complex requirements that describe reactive and possibly infinite behaviors. However, enumerating all the...

    Provided By George Mason University

  • White Papers // Apr 2010

    Functional Crowds

    Most crowd simulation research either focuses on navigating characters through an environment while avoiding collisions or on simulating very large crowds. The authors' work focuses on creating populations that inhabit a space as opposed to passing through it. Characters exhibit behaviors that are typical for their setting. They term these...

    Provided By George Mason University