Now showing items 485-504 of 619

  • [2012-01-26] Reducing Redundancies in Reconfigurable Antenna Structures Using Graph Models 

    Abdallah, Chaouki T.; Costantine, Joseph; al-Saffar, Sinan; Christodoulou, Christos G.
    We present an approach for reducing redundancies in the design of reconfigurable antenna structures using graph models. The basics of graph models, their rules, and how they can be applied in the design of switch-based ...
  • [2012-04-12] A Reduction in Conservatism for Convex Linear-Quadratic Simultaneous Performance Design 

    Abdallah, Chaouki T.; Luke, Robert A.; Dorato, Peter
    In this paper a fixed state feedback control law which minimizes upper bounds on linear-quadratic performance measures for m distinct plants is studied. Previous work [8] by the authors demonstrated a convex semidefinite ...
  • [2010-06-25] Relationship between procurement duration and project performance in design-build water/wastewater projects 

    Jin, Ruoyu
    The design-build (DB) project delivery system (PDS) has been widely applied and studied in the construction industry. Its advantages include shortened project duration, lowered risk to the owner, improved project performance, ...
  • [2009-08-27] The relationship between procurment duration and design-build success in transportation projects 

    Chen, Ao
    State Departments of Transportation (DOTs)are increasingly interested in developing new strategies for the design and construction of transportation projects. As a result, they are adopting more integrated process. Projects ...
  • [2010-06-25] Remote-sensing of underground caverns using a full-Maxwell's equations FDTD model 

    Ethan, Tanner
    A need exists to reliably detect and characterize underground structures from immediately above the Earth’s surface within the vicinity of the structures, as well as via aerial surveys. Sandia National Labs and the University ...
  • [2011-02-08] Research Towards the Development of an Optically Pumped Cesium Dimer Laser 

    Qassim, Omar
    Metal vapor lasers are a promising candidate for high power laser systems and have been a recent area of interest. These types of lasers seem to combine all the strengths of both gas/chemical and solid state lasers without ...
  • [2007-04-17] Resource Allocation for Multi-agent Problems in the Design of Future Communication Networks 

    Piovesan, Jorge; Abdallah, Chaouki; Tanner, Herbert; Jerez, Henry; Khoury, Joud
    A new architecture for a smarter Internet abstracts the functional components of the network from the hardware that enables it. This is done via software agents that implement such functions and are capable of relocating ...
  • [2011-08-30] Resource allocation in realistic wireless cognitive radios networks 

    Alayesh, Mahmoud
    Cognitive radio networks provide an effective solution for improving spectrum usage for wireless users. In particular, secondary users can now compete with each other to access idle, unused spectrum from licensed primary ...
  • [2010-02-09] Resource allocation of the human brain : a competitive equilibrium approach 

    Franco, Alexandre Rosa, 1981-
    A novel model to study the resource allocation of a functioning brain is proposed. The mechanism is based on the theory of competitive equilibrium (CE), where users (cortical areas of the brain) are competing for a finite ...
  • [2012-03-20] Resource-Constrained Load Balancing Controller for a Parallel Database 

    Abdallah, Chaouki T.; Tang, Z.; Birdwell, J. D.; Chiasson, J.; Hayat, M.
    This brief documents experimental results using a deterministic dynamic nonlinear system for load balancing, previously reported by Tang et al. in a cluster of computer nodes used for parallel computations in the presence ...
  • [2012-03-27] Resource-constrained load balancing controller for a parallel database 

    Abdallah, Chaouki T.; Birdwell, J. Douglas; Tang, Zhong; Chiasson, John; Hayat, Majeed M.
    The critical features of the load balancing problem are the delayed receipt of information and transferred load. Load distribution and task processing contend for the same resources on each computational element. This paper ...
  • [2012-03-23] Responsive Algorithms for Defending Recon gurable Networks 

    Abdallah, Chaouki T.; Boman, I-Ching; Saia, Jared; Schamiloglu, Edl
    We present algorithms to self-heal reconfigurable networks when they are under attack. These algorithms reconfigure the network during attack to protect two critical invariants. First, they insure that the network remains ...
  • [2010-02-09] RF channel characterization for cognitive radio using support vector machines 

    Atwood, Thomas
    Cognitive Radio promises to revolutionize the ways in which a user interfaces with a communications device. In addition to connecting a user with the rest of the world, a Cognitive Radio will know how the user wants to ...
  • [2011-02-08] Rheological and nanomechanical characterization of aging in polymer modified asphalt 

    Yousefi, Seyed Saleh
    In this study, change in rheological and nanomechanical properties of asphalt due to aging is determined in the laboratory. Asphalt binders are aged using Rolling Thin Film Oven (RTFO), Pressure Aging Vessel (PAV), and ...
  • [2010-09-09] Rights management over web mashups 

    Yamuzala Venkata, Aswin
    Web mashups have become one of the most powerful features of the Web 2.0 revolution. Though the sources of the mashups have access control over their content, the lack of proper Rights Management over the content given out ...
  • [2012-04-24] Robust adaptive control for a class of partially known nonlinear systems 

    Abdallah, Chaouki T.; Lewis, F. L.; Maliotis, G.
    An adaptive controller is developed that takes advantage of the structure and any known dynamics of the system in order to increase speed of adaptation and relax the conditions required for convergence. The control design ...
  • [2012-04-24] Robust control of accelerators 

    Abdallah, Chaouki T.; Johnson, W. Joel D.
    The problem of controlling tile variations in the rf power system can be effectively cast as an application of modern control theory. Two components of this theory are obtaining a model and a feedback structure. The model ...
  • [2012-04-24] Robust Control of Particle Accelerators 

    Abdallah, Chaouki T.; Johnson, W. Joel D.
    Abstract In this paper, we present a new technique for controlling the electric fields of an electron particle accelerator. This new scheme has greater stability and performance robustness than was previously achieved.
  • [2012-04-12] Robust finite-time stability design via linear matrix inequalities 

    Abdallah, Chaouki T.; Dorato, Peter; Famularo, D.
    For linear systems with polytopic uncertainties, the problem of robust finite-time stabilization is reduced to a system of Linear Matric Inequalities.
  • [2012-04-13] Robust lateral control of highway vehicles 

    Abdallah, Chaouki T.; Byrne, Raymond H.
    Vehicle lateral dynamics are affected by vehicle mass, longitudinal velocity, vehicle inertia, and the cornering stiffness of the tires. All of these parameters are subject to variation, even over the course of a single ...