Now showing items 501-520 of 990

    • Laboratory Simulation of Artificial Plasma Clouds in the Ionosphere 

      Morse, D.; Destler, William (American Geophysical Union, 1973)
      The results of an experiment to model the behavior of artificial plasma clouds in the ionosphere are presented. The formation of field-aligned structure or striations is frequently observed. The appearance of this structure ...
    • Lang and Kobayashi phase equation 

      Alsing, Paul; Kovanis, Vassilios; Gavrielides, Athanasios; Erneux, Thomas (American Physical Society, 1996-06)
      Lang and Kobayashi equations for a semiconductor laser subject to optical feedback are investigated by using asymptotic methods. Our analysis is based on the values of two key parameters, namely, the small ratio of the ...
    • Lang and Kobayashi phase equation and its validity for low pump 

      Erneux, Thomas; Alsing, Paul; Kovanis, Vassilios; Gavrielides, Athanasios (The International Society for Optical Engineering (SPIE), 1996-05)
      An asymptotic theory of Lang and Kobayashi (LK) equations describing a semiconductor laser subject to optical feedback is investigated in detail. We obtain a simple third order, nonlinear, delay-differential equation for ...
    • The large scale distribution of warm ionized gas around nearby radio galaxies with jet-cloud interactions 

      Tadhunter, Clive; Villar-Martin, Montse; Morganti, Raffaella; Bland-Hawthorn, Joss; Axon, David (Blackwell Publishing: Monthly Notices of the Royal Astronomical Society, 2000-06)
      Deep, narrow-band Halpha observations taken with the TAURUS Tunable Filter (TTF) on the 4.2m WHT telescope are presented for two nearby radio galaxies with strong jet-cloud interactions. Although the brightest emission ...
    • A large, uniform sample of X-ray emitting AGN from the ROSAT All-Sky and Sloan Digital Sky Surveys: the Data Release 5 Sample 

      Anderson, Scott; Margon, Bruce; Voges, Wolfgang; Plotkin, Richard; Syphers, David; Haggard, Daryl; Collinge, Matthew; Meyer, Jillian; Strauss, Michael; Agueros, Marcel; Hall, Patrick; Homer, Lee; Richards, Gordon; Richmond, Michael; Schneider, Donald; Stinson, Gregory; Vanden Berk, Daniel; York, Donald (American Astronomical Society - The Astronomical Journal, 2003-11)
      We describe further results of a program aimed to yield ∼104 fully characterized optical identifications of ROSAT X-ray sources. Our program employs X-ray data from the ROSAT All-Sky Survey (RASS), and both optical imaging ...
    • A large, uniform sample of X-ray emitting AGN: selection approach and an initial catalog from the ROSAT All-Sky and Sloan Digital Sky Surveys 

      Anderson, Scott; Voges, Wolfgang; Margon, Bruce; Trumper, Joachim; Agueros, Marcel; Boller, Thomas; Collinge, Matthew; Homer, Lee; Stinson, Gregory; Strauss, Michael; Annis, James; Gomez, Percy; Hall, Patrick; Nichol, Robert; Richards, Gordon; Schneider, Donald; Vanden Berk, Daniel; Fan, Xiaohui; Ivezic, Zeljko; Munn, Jeffrey; Newberg, Heidi Jo; Richmond, Michael; Weinberg, David; Yanny, Brian; Bahcall, Neta; Brinkmann, Jonathan; Fukugita, Masataka; York, Donald (American Astronomical Society - The Astronomical Journal, 2003-11)
      Many open questions in X-ray astronomy are limited by the relatively small number of objects in uniform optically-identified and observed samples, especially when rare subclasses are considered, or when subsets are ...
    • Largely detuned injection-locked semiconductor lasers 

      Kovanis, Vassilios; Erneux, Thomas; Gavrielides, Athanasios (Elsevier Science B.V., 1999-01-01)
      The equations for a semiconductor laser subject to injection are examined numerically and analytically for large values of the detuning parameter. Our analysis is motivated by recent experimental studies using either ...
    • Laser synthesis of single-wall carbon nanotubes utilizing high temperature induction heating. 

      Gennett, Thomas; Dillon, Anne; Alleman, Jeffrey; Jones, K.; Parilla, Philip; Heben, Michael (Materials Research Society Proceedings: Nanotubes and Related Materials, 2001)
      An inductive heating system was used to control the temperature of the target during laser synthesis of SWNTs. The position of the target relative to the heating coil, the type of catalyst metals and the synthesis temperatures ...
    • Laser-induced fluorescence: Limits to the remote detection of hydrogen ion, aluminum, and dissolved organic matter 

      Philpot, William; Vodacek, Anthony (Elsevier Science B.V., Amsterdam, 1989-07)
      Laser-induced fluorescence (LIF) of dissolved organic matter (DOM) in lake water is, to a certain extent, indicative of water quality. DOM fluorescence intensity varies directly with connentration of the fluorescing organic ...
    • Lead free selective soldering process optimization 

      Ramkumar, S. Manian; Pannerselvam, Elavarasan (SMTA: SMTA International Conference Proceedings, 2007)
    • Lead-free 0201 manufacturing, assembly and reliability test results 

      Ramkumar, S. Manian; Ghaffarin, Reza; Varanasi, Arun (Elsevier, 2006)
      The trend towards smaller, faster and cheaper electronic devices has led to an increase in the use of 0201 (L not, vert, similar 0.02 in.; W not, vert, similar 0.01 in.) and even smaller sized passive components. The size ...
    • Learning styles of deaf college students and instructors' teaching emphases 

      Lang, Harry; Stinson, M.; Kavanagh, Firoza; Liu, Yufang; Basile, Mary (Oxford University Press, 1999)
      Six learning style dimensions of the Grasha-Riechmann Student Learning Style Scales (GRSLSS) were examined in this study with 100 deaf college students. In addition, six corresponding scales of teaching emphases were ...
    • Leech-Repellent Property of Eastern Red-Spotted Newts, Notophthalmus viridescens 

      Pough, F. Harvey (American Association for the Advancement of Science: Science, 1971-12-10)
      Eastern red-spotted newts (Notophthalmus viridescens, Salamandridae) are rarely attacked by leeches. This protection is not shared by related salamandrids or by Ambystoma (Ambystomatidae). Tetrodotoxin is not the repelent. ...
    • Light scattering and phase behavior of lysozyme-PEG mixtures 

      Bloustine, J.; Virmani, T.; Thurston, George; Fraden, S. (Elsevier, 2006-03-03)
      Measurements of liquid-liquid phase transition temperatures (cloud points) of mixtures of a protein (lysozyme) and a polymer, poly(ethylene glycol) (PEG) show that the addition of low molecular weight PEG stabilizes the ...
    • Line balancing and productivity improvements in electronics assembly using modeling and simulation techniques 

      Ramkumar, S. Manian (SMTA: SMTA Pan Pacific Microelectronics Symposium, 2002)
      The study presented in this paper was to model, simulate and analyze the performance of three existing assembly lines, in an electronics assembly facility, and suggest modifications to the lines, in order to improve machine ...
    • Linear pixel shuffling for image processing, an introduction 

      Anderson, Peter (International Society for Optical Engineering (SPIE), 1993-04)
      We investigate a method of ordering pixels (the elements of a rectangular matrix) based on an arithmetic progression with wrap-around (modular arithmetic). For appropriate choices of the progression's parameters, based on ...
    • Linear stability conditions for a first-order three-dimensional discrete dynamic 

      Brooks, Bernard (Elsevier Science B.V., Amsterdam, 2004-04)
      Linear stability conditions for a first-order three-dimensional discrete dynamic are derived in terms of the trace, determinant, and sum of principle minors of the Jacobian evaluated at the equilibrium.
    • Linewidth broadening across a dynamical instability 

      Varangis, Petros; Gavrielides, Athanasios; Kovanis, Vassilios; Lester, Luke (Elsevier Science B.V., 1998-12-21)
      We investigate experimentally and theoretically the variation of the emission linewidth of an optically-injected semiconductor laser across a resonant period-doubling bifurcation. Close to the dynamical instability, the ...
    • A liquid culture method for rescuing immature embryos of eastern cottonwood 

      Savka, Michael; Dawson, Jeffrey; Jokela, Jalmer; Skiryin, Robert (Springer: Plant Cell, Tissue and Organ Culture, 1987-01)
      A one-step method to rescue immature embryos of eastern cottonwood (Populus deltoides Bartr.) is described. Plantlets developed from 83% of 25-day-old embryos grown in shaken culture on Murashige and Skoog (MS) liquid ...