Citations Only: Recent submissions

Now showing items 421-440 of 990

    • Conley decomposition for closed relations 

      McGehee, Richard; Wiandt, Tamas (Taylor & Francis, 2006-01)
      This paper presents a theory of dynamics of closed relations on compact Hausdorff spaces. It contains an investigation of set valued maps and establishes generalizations for some topological aspects of dynamical systems ...

    • Injection characterization of packaged bi-directional diamond shaped ring lasers at 1550 nm 

      Bussjager, Rebecca; Erdmann, Reinhard; Kovanis, Vassilios; McKeon, Brian; Fanto, Michael; Johns, Steve; Hayduk, Michael; Osman, Joseph; Morrow, Alan; Green, Malcolm; Stoffel, Nancy; Tan, Songsheng; Shick, Charles; Bacon, Wesley; Beaman, Bryan (The International Society for Optical Engineering (SPIE), 2006-05-12)
      The Air Force Research Laboratory, Binoptics Corp., and Infotonics Technology Center worked collaboratively to package and characterize recently developed diode based ring lasers that operate at 1550 nm in a diamond shaped ...

    • Solid-state array cameras 

      Strull, G.; List, W.; Irwin, E.; Farnsworth, David (Optical Society of America, 1972-05)
      Over the past few years there has been growing interest shown in the rapidly maturing technology of totally solid-state imaging. This paper presents a synopsis of developments made in this field at the Westinghouse ATL ...

    • On group rings which are not ore domains 

      Engel, Alejandro; Makar-Limanov, Leonid (Springer New York, 1989-12)

    • Necessary conditions for a semigroup ring to be an integral CRM-ring with identity 

      Engel, Alejandro (Springer New York, 1976-12)
      The immersion of semigroup rings into division rings gave rise to Tamari's [6] hierarchical classification of semigroups. Some basic properties of this classification were given elsewhere ([1] , [2] and [3]), pointing out ...

    • The homomorphic image of a Tn-semigroup 

      Engel, Alejandro (Springer New York, 1972-12)

    • Morphosis of the Julia set of the real parameter family of complex quadratic maps 

      Engel, Alejandro (Elsevier Science B.V., Amsterdam, 1993-05)
      The present note explores the structure of the interior of Julia sets and of the Mandelbrot set of quadratic maps. These sets usually appear as ‘dark’ regions in the computer generated graphics of iterations of the quadratic ...

    • Dynamical systems characterized by automata 

      Engel, Alejandro (Springer Wien, 1979-03)
      Automata and Dynamical Systems Theory both rest on a common mathematical structure. In this work the interrelation between these theories is studied, starting with a simple characterization of a dynamical system (and some ...

    • Amplitude modulation in a pair of time-delay coupled external-cavity semiconductor lasers 

      Prasad, Awadhesh; Lai, Ying-Cheng; Gavrielides, Athanasios; Kovanis, Vassilios (Elsevier Science B.V., 2003-11-03)
      The phenomenon of amplitude death in coupled nonlinear oscillators has been a topic of recent interest. We demonstrate that a similar phenomenon can occur in a pair of time-delay coupled, external-cavity semiconductor ...

    • Injection-locked semiconductor laser dynamics from large to small detunings 

      Nizette, Michel; Erneux, Thomas; Gavrielides, Athanasios; Kovanis, Vassilios (The International Society for Optical Engineering (SPIE), 1999-08)
      The equations for a semiconductor laser subject to injection are examined numerically and analytically from large negative to moderate negative to positive values of the detuning. We concentrate on the stability of the ...

    • Sense from sensitivity and variation of parameters 

      Baker, Christopher; Agyingi, Ephraim; Parmuzin, Eugene; Rihan, Fathalla; Song, Yihong (Elsevier Science B.V., Amsterdam, 2006-03)
      It is known that Alekseev’s variation of parameters formula for ordinary differential equations can be generalized to other types of causal equations (including delay differential equations and Volterra integral equations), ...

    • Stability and bifurcations of periodically modulated, optically injected laser diodes 

      Nizette, Michel; Erneux, Thomas; Gavrielides, Athanasios; Kovanis, Vassilios (American Physical Society, 2001-02)
      Recent experiments using lasers subject to external injection

    • Regular dynamics of low-frequency fluctuations in external cavity semiconductor lasers 

      Davidchack, Ruslan; Lai, Ying-Cheng; Gavrielides, Athanasios; Kovanis, Vassilios (American Physical Society, 2001-05)
      It is commonly believed that the dynamics responsible for low-frequency fluctuations (LFF’s) in external cavity semiconductor lasers is stochastic or chaotic. A common approach to address the origin of LFF’s is to investigate ...

    • Rapid, upward buoyant filtration combustion waves driven by convection 

      Wahle, Christopher; Matkowsky, Bernard (Elsevier Science B.V., Amsterdam, 2001-01)
      A two-temperature model is employed to analyze upward buoyant filtration combustion (BFC) waves. We consider heterogeneous (solid/gas) combustion in a porous sample open to gas flow only at the top and the bottom. The ...

    • A Study of detonation evolution and structure for a model of compressible two-phase reactive flow 

      Schwendeman, Donald; Wahle, Christopher; Kapila, Ashwani (Taylor and Francis, Ltd, 2006-10-25)
      A two-phase model of heterogeneous explosives, due to Baer and Nunziato, is examined computation- ally by a new numerical approach that is a modification of the standard Godunov scheme. The approach generates well-resolved ...

    • Using neural networks for controlling chaos 

      Alsing, Paul; Gavrielides, Athanasios; Kovanis, Vassilios (The International Society for Optical Engineering (SPIE), 1994-03)
      A feed-forward backpropagating neural network is trained to achieve and maintain control of the unstable periodic orbits embedded in a chaotic attractor. The controlling algorithms used for training the network are based ...

    • Displacement of artifacts in inverse scattering 

      Felea, Raluca (The Institute of Physics (IOP), 2007-08)
      We analyze further inverse problems related to synthetic aperture radar imaging considered by Nolan and Cheney (2002 Inverse Problems 18 221). Under a nonzero curvature assumption, it is proved that the forward operator F ...

    • The Sum of absolute deviations and the sum of squared deviations 

      Farnsworth, David (Mathematical Association of America, 1990-12)
      This note points out a similarity in the sum-of-squares and the sum-of-absolute-values settings of data analysis.

    • Low-frequency fluctuations in external cavity semiconductor lasers: understanding based on a simple dynamical model 

      Prasad, Awadhesh; Lai, Ying-Cheng; Gavrielides, Athanasios; Kovanis, Vassilios (Institute of Physics, 2001-08)
      We investigate the dynamical origin of low-frequency fluctuations (LFFs) in external cavity semiconductor lasers by utilizing a simplified, three-dimensional model derived from the infinite-dimensional Lang-Kobayashi (LK) ...

    • Some flow-equivalent planar and non-planar graphs 

      Shahmohamad, Hossein (Elsevier Science B.V., Amsterdam, 2001-09-28)
      We find three non-planar graphs which are flow-equivalent to planar graphs. It is also shown that some non-planar graphs are not flow-equivalent to any planar graph.