Now showing items 23246-23265 of 84846

    • Dynamical regimes of vortex flow in type-II superconductors with parallel twin boundaries 

      Chaturvedi, H.; Galliher, N.; Dobramysl, U.; Pleimling, Michel; Täuber, Uwe C.
      We explore the dynamics of driven magnetic flux lines in disordered type-II superconductors in the presence of twin boundaries oriented parallel to the direction of the applied magnetic field, using a three-dimensional ...
    • Dynamical System Representation and Analysis of Unsteady Flow and Fluid-Structure Interactions 

      Hussein, Ahmed Abd Elmonem Ahmed (Virginia Tech, 2018-11-01)
      A dynamical system approach is utilized to reduce the representation order of unsteady fluid flows and fluid-structure interaction systems. This approach allows for significant reduction in the computational cost of their ...
    • Dynamically Corrected Quantum Control: A Geometrical Framework 

      Zeng, Junkai (Virginia Tech, 2019-10-22)
      Implementing high-fidelity quantum control and suppressing the unwanted environmental noise has been one of the essential challenges in developing quantum information technologies. In the past, driving pulse sequences based ...
    • Dynamically Reconfigurable Networks: Concept Evaluation Through Simulation 

      Venkateshwaran, Anjali; Nance, Richard E.; Balci, Osman (Department of Computer Science, Virginia Polytechnic Institute & State University, 1988), TR-88-34
      The dynamically reconfigurable hierarchical network offers decided advantages in reliability and survivability. The concept is evaluated strictly in terms of message transmission delays for demand scenarios that vary widely. ...
    • Dynamics & Control of Underwater Gliders II: Motion Planning and Control 

      Mahmoudian, N.; Woolsey, C. (Virginia Center for Autonomous Systems, 2010)
      This paper describes an underwater glider motion control system intended to enhance locomotive efficiency by reducing the energy expended by vehicle guidance and control. In previous work, the authors derived an approximate ...
    • Dynamics and Characterization of Soil Organic Matter on Mine Soils 16 Years after Amendment with Topsoil, Sawdust, and Sewage Sludge 

      Bendfeldt, Eric S. (Virginia Tech, 1999-07-14)
      The present state and future prospect of the world's soil resources has prompted scientists and researchers to address the issue of soil quality and sustainable land management. Soil quality research has focused on ...
    • Dynamics and Control for Vibration Isolation Design 

      Sciulli, Dino (Virginia Tech, 1997-04-28)
      The single-degree-of-freedom (SDOF) system is the most widely used model for vibration isolation systems. The SDOF system is a simple but worthy model because it quantifies many results of an isolation system. For instance, ...
    • Dynamics and control of a planar truss actuator 

      Lovejoy, Vincent Dean (Virginia Polytechnic Institute and State University, 1987)
      Recent demands in large space structure technology have suggested the use of active control actuators integral to a structures' construction. The concept of a 3-D (triangular cross-sectioned) active truss is presented. The ...
    • Dynamics and Control of a Pressurized Optical Membranes 

      Tarazaga, Pablo Alberto (Virginia Tech, 2009-08-07)
      Optical membranes are currently pursued for their ability to replace the conventional mirrors that are used to correct wave front aberration and space-based telescopes. Among some of the many benefits of using optical ...
    • Dynamics and Control of a Tensegrity System in Low-Earth Orbit 

      Rye, Maria del Carmen (Virginia Tech, 2017-05-03)
      Tensegrity is the name given to a system of interconnected bars and tendons that can form a flexible self-standing structure. Its flexibility is due to the ability of the bars to move near-independent to each other, movement ...
    • Dynamics and Control of Flexible Aircraft 

      Tuzcu, Ilhan (Virginia Tech, 2001-12-19)
      This dissertation integrates in a single mathematical formulation the disciplines pertinent to the flight of flexible aircraft, namely, analytical dynamics, structural dynamics, aerodynamics and controls. The unified ...
    • Dynamics and Control of Flexible Multibody Structures 

      Stemple, Timothy J. (Virginia Tech, 1998-03-19)
      The goal of this study is to present a method for deriving equations of motion capable of modeling the controlled motion of an open loop multibody structure comprised of an arbitrary number of rigid bodies and slender ...
    • Dynamics and control of manipulating robots 

      Varghese, Philip (Virginia Tech, 1987-02-05)

      Dynamics and Control of manipulating robots currently is a major field of research in robotics. Various methods of efficiently formulating the non-linear dynamics have been proposed with an emphasis on reducing the ...

    • Dynamics and Control of Membrane Mirrors for Adaptive Optic Applications 

      Renno, Jamil M. (Virginia Tech, 2008-09-02)
      Current and future space exploration operations rely heavily on space-borne telescopes, of which mirrors are an integral component. However, traditional solid mirrors are heavy and require a big storage space. Deploying ...
    • Dynamics and Control of Morphing Aircraft 

      Seigler, Thomas Michael (Virginia Tech, 2005-08-02)
      The following work is directed towards an evaluation of aircraft that undergo structural shape change for the purpose of optimized flight and maneuvering control authority. Dynamical equations are derived for a morphing ...
    • Dynamics and Control of Satellite Relative Motion: Designs and Applications 

      Lee, Soung Sub (Virginia Tech, 2009-03-20)
      This dissertation proposes analytic tools for dynamics and control problems in the perspective of large-scale relative motion without perturbations. Specifically, we develop an exact and efficient analytic solution of ...
    • Dynamics and control of spacecraft with retargeting flexible antennas 

      Kwak, Moon Kyu (Virginia Polytechnic Institute and State University, 1989)
      This dissertation is concerned with the dynamics and control of spacecraft consisting of a rigid platform and a given number of retargeting flexible antennas. The mission consists of maneuvering the antennas so as to ...
    • Dynamics and control of switchmode power conversions in distributed power systems 

      Choi, Byungcho (Virginia Tech, 1992-05-06)
      Comprehensive analysis, modeling, and design techniques are developed for distributed power systems. Dynamic interactions caused by paralleling, stacking, and cascading converter modules are analyzed. Incorporating the ...
    • Dynamics and control of the Asiatic clam in the New River, Virginia 

      Cherry, Donald S.; Rodgers, John H.; Graney, Robert L.; Cairns, John Jr. (Virginia Water Resources Research Center, Virginia Polytechnic Institute and State University, 1980)
      The Asiatic clam, Corbicula fluminea, has invaded the New River at the rate of nine miles a year from the Kanawha River, which enters downstream from the Glen Lyn coal-powered generating plant in Virginia. During the period ...
    • Dynamics and Control of Underwater Gliders I: Steady Motions 

      Mahmoudian, N.; Geisbert, J.; Woolsey, C. (Virginia Center for Autonomous Systems, 2007)
      This paper describes analysis of steady motions for underwater gliders, a type of highly efficient underwater vehicle which uses gravity for propulsion. Underwater gliders are winged underwater vehicles which locomote by ...