Now showing items 1-20 of 32

    • An Approach to Scalability Study of Shared Memory Parallel Systems 

      Sivasubramaniam, Anand; Singla, Aman; Ramachandran, Umakishore; Venkateswaran, H. (Georgia Institute of Technology, 1993)
      The overheads in a parallel system that limit its scalability need to be identified and separated in order to enable parallel algorithm design and the development of parallel machines. Such overheads may be broadly ...
    • Automatic Parallelization of Discrete Event Simulation Programs 

      Tsai, Jya-Jang; Fujimoto, Richard M. (Georgia Institute of Technology, 1993)
      Contemporary simulation applications usually need to process many millions of events to obtain sufficiently accurate performance predictions for large, complex systems. While parallel computation offers a solution to ...
    • Avoiding Conflicts between Reads and Writes Using Dynamic Versioning 

      Gukal, Sreenivas; Omiecinski, Edward Robert; Ramachandran, Umakishore (Georgia Institute of Technology, 1994)
      In this paper, we discuss a new approach to multi-version concurrency control, called Dynamic Versioning, that avoids the data contention due to conflicts between Reads and Writes. A data item is allowed to have ...
    • A Comparative Evaluation of Techniques for Studying Parallel Systems 

      Sivasubramaniam, Anand; Ramachandran, Umakishore; Venkateswaran, H. (Georgia Institute of Technology, 1994)
      This paper presents a comparative and qualitative survey of techniques for evaluating parallel systems. We also survey metrics that have been proposed for capturing and quantifying the details of complex parallel ...
    • A Comparative Study of Distributed Shared Memory System Design Issues 

      Mohindra, Ajay; Ramachandran, Umakishore (Georgia Institute of Technology, 1994)
      In this research the various issues that arise in the design and implementation of distributed shared memory (DSM) systems are examined. This work has been motivated by two observations: distributed systems will ...
    • Development of a Multipurpose Low Thrust Interplanetary Trajectory Calculation Code 

      Sakai, Tadashi; Olds, John R. (Georgia Institute of Technology, 2003-08)
      A multipurpose low thrust interplanetary trajectory calculation code has been developed. This code integrates the equations of motion along the trajectory assuming that the spacecraft is subject to a single attracting body ...
    • Dynamic modeling and feedback control with mode-shifting of a two-mode electrically variable transmission 

      Katariya, Ashish Santosh (Georgia Institute of Technology, 2012-08-31)
      This thesis develops dynamic models for the two-mode FWD EVT, develops a control system based on those models that is capable of meeting driver torque demands and performing synchronous mode shifts between different EVT ...
    • Dynamic Simulation of Splashing Fluids 

      O'Brien, James F.; Hodgins, Jessica K. (Georgia Institute of Technology, 1994)
      In this paper we describe a method for modeling the dynamic behavior of splashing fluids. The model simulates the behavior of a fluid when objects impact or float on its surface. The forces generated by the objects create ...
    • Finger Sculpting with Digital Clay 

      Gargus, Joshua; Kim, Byungmoon; Rossignac, Jaroslaw R.; Shaw, Christopher D. (Georgia Institute of Technology, 2002)
      "Digital Clay" is a term that signifies a computer-controlled physical surface, capable of taking any of a wide variety of possible shapes in response to changes in a digital 3D model or changes in the pressure exerted ...
    • Generation and Analysis of Random Graphs to Model Internetworks 

      Thomas, Megan; Zegura, Ellen W. (Georgia Institute of Technology, 1994)
      Graph models are commonly used in studying solutions to internetworking problems. This paper considers several random graph models that have been used to model internetworks, and considers ways to characterize the ...
    • High-Fidelity Modeling of Computer Network Worms 

      Perumalla, Kalyan S.; Sundaragopalan, Srikanth (Georgia Institute of Technology, 2004-06-23)
      Abstract modeling, such as using epidemic models, has been the general method of choice for understanding and analyzing the high-level effects of worms. However, high-fidelity models, such as packet-level models, are ...
    • Improved Randomized Broadcast Protocol in Multi-hop Radio Networks 

      Lee, Chungki; Ammar, Mostafa H. (Mostafa Hamed); Burns, James Edward (Georgia Institute of Technology, 1993)
      This paper presents a suite of randomized broadcast protocols for the problem of broadcasting a message in multi-hop radio networks. The protocols are compared with the randomized broadcast protocol by Bar-Yehuda et ...
    • An Integrated Decision-making Method to Identify Design Requirements Through Agent-based Simulation for Personal Air Vehicle System 

      Lewe, Jung-Ho; Ahn, Byung-Ho; DeLaurentis, Daniel A.; Mavris, Dimitri N.; Schrage, Daniel P. (Georgia Institute of Technology, 2002-10)
      A product?s design requirements guide the next development efforts. Thus, correct decision-making is critical in generating design requirements as vehicle concepts are being formulated. A new method is proposed to account ...
    • Integration of Cost and Business Simulation into Conceptual Launch Vehicle Design 

      Lee, Hosung; Olds, John R. (Georgia Institute of Technology, 1997-09)
      This paper reports on research that integrates cost modeling and business simulation into conceptual design environments for advanced launch vehicle programs. A new design-oriented computer tool has been developed and used ...
    • LASSO - Lunar Architecture Stochastic Simulator and Optimizer 

      Alemany, Kristina; Street, David C. (Georgia Institute of Technology, 2005-08)
      The Lunar Architecture Stochastic Simulator and Optimizer (LASSO) is a simulation-based capability, based upon discrete event simulation (DES), for evaluating and optimizing flight element options for lunar transportation ...
    • Memory Optimizations for Distributed Stream-based Applications 

      Harel, Nissim (Georgia Institute of Technology, 2006-11-01)
      Distributed stream-based applications manage large quantities of data and exhibit unique production and consumption patterns that set them apart from general-purpose applications. This dissertation examines possible ways ...
    • A Methodology for Assessing Business Models of Future Air Transportation in the Atlanta Regional Transportation System 

      Lim, Choon Giap; Lewe, Jung-Ho; DeLaurentis, Daniel A.; Mavris, Dimitri N. (Georgia Institute of Technology, 2004-09)
      A methodology employing physics-based and economics-based tools in conjunction with probabilistic treatment is developed to study Personal Air Vehicle business model. In the context of the paper, a business model is a ...
    • Modeling and Simulations of Worms and Mitigation Techniques 

      Abdelhafez, Mohamed (Georgia Institute of Technology, 2007-11-14)
      Internet worm attacks have become increasingly more frequent and have had a major impact on the economy, making the detection and prevention of these attacks a top security concern. Several countermeasures have been proposed ...
    • On the Performance of a Multicast Delivery Video-On-Demand Service with Discontinuous VCR Actions 

      Almeroth, Kevin C.; Ammar, Mostafa H. (Mostafa Hamed) (Georgia Institute of Technology, 1994)
      In most proposed architectures for Video-On-Demand (VOD) systems, the customers are serviced individually by allocating and dedicating a trans- mission channel and a set of video server resources to each customer. ...
    • On the Semantics of Internet topologies 

      Mihail, Milena; Gkantsidis, Christos; Saberi, Amin (Georgia Institute of Technology, 2002)
      To date, the most successful approach to modeling the AS-level topology is the degree-driven approach of Inet. Inet predicts the degrees of the topology by extrapolation from available data, then constructs a topology meeting ...