Now showing items 341-360 of 990

    • Fast algorithms for phase and magnitude reconstruction from bispectra 

      Dianat, Sohail; Raghuveer, M.R. (International Society for Optical Engineering (SPIE), 1990-05)
      Techniques are developed for signal reconstruction from samples of the bispectrum of a 1-D or 2-D signal. The phase and magnitude of the Fourier transform of a signal as well as those of the bispectrum are expanded into ...
    • Fast charge-transfer reactions of binuclear complexes undergoing large changes in metal---metal bond lengths 

      Gennett, Thomas; Geiger, William; Willet, Brian; Anson, Fred (Elsevier: Journal of Electroanalytical Chemistry, 1987-05-08)
      Heterogeneous electron-transfer rates have been measured for three binuclear complexes, Cp2Fe2(CO)2(μ-SMe)2, 1, Cp2Fe2(CO)2(μ-PPh2)2, 2, and Cp2Mo2(μ-SMe)4, 3. Dahl and co-workers had shown previously that the cations of ...
    • Fault diagnosis for airplane engines using Bayesian networks and distributed particle swarm optimization 

      Sahin, Ferat; Yavuz, M. Cetin; Arnavut, Ziya; Uluyol, Onder (Elsevier, 2007-03)
      This paper presents a fault diagnosis system for airplane engines using Bayesian networks (BN) and distributed particle swarm optimization (PSO). The PSO is inherently parallel, works for large domains and does not trap ...
    • Fiber-optic four-detector polarimeter 

      Bouzid, Ahmed; Abushagur, Mustafa; El-Sabae, Aed; Azzam, R.M.A. (Elsevier - Optics Communications, 1995-07-15)
      A novel design for a fiber-optic four-detector polarimeter (FO-FDP) is presented. It consists of four externally induced incore fiber gratings together with four photodetectors. The device is compact, light-weight, avoids ...
    • Fire temperature retrieval using constrained spectral unmixing and emissivity estimation 

      Ononye, Ambrose; Vodacek, Anthony; Kremens, Robert (The International Society for Optical Engineering (SPIE), 2005-06)
      Accurate retrieval of wildland fire temperature from remote imagery would be useful in improving prediction of fire propagation and estimates of fire effects such as burn severity and gas and particle production. The ...
    • First operation of a 94 GHz, sheet beam, FEL amplifier 

      Zhang, Ze-Xiang; Granatstein, V.; Destler, William; Levush, B.; Antonsen, T.; Rodgers, J.; Cheng, S. (Elsevier, 2002-10-14)
      Millimeter wave (94 GHz) amplification has been observed in the sheet beam, planar wiggler, free electron laser. Using a 4 A sheet beam (20 mm × 1.0 mm) at an electron energy of 530 keV, injected wave power of 5 W was ...
    • The First total synthesis of the proposed structure of Montiporyne E 

      Collison, Christina; Chen, Jian; Walvoord, Ryan (Georg Thieme Verlag, 2006)
      Montiporyne E, a novel diacetylenic lactam isolated from the stony coral Montipora sp., was shown to exhibit cytotoxicity against certain solid tumor cells. Construction of a suitably functionalized α,β-unsaturated lactam ...
    • First-Year spectroscopy for the SDSS-II Supernova Survey 

      Zheng, Chen; Romani, Roger; Sako, Masao; Marriner, John; Bassett, Bruce; Becker, Andrew; Choi, Changsu; Cinabro, David; DeJongh, Fritz; Depoy, Darren; Dilday, Ben; Doi, Mamoru; Frieman, Joshua; Garnavich, Peter; Hogan, Craig; Holtzman, Jon; Im, Myungshin; Jha, Saurabh; Kessler, Richard; Konishi, Kohki; Lampeitl, Hubert; Marshall, Jennifer; McGinnis, David; Miknaitis, Gajus; Nichol, Robert; Preito, Jose; Riess, Adam; Richmond, Michael; Schneider, Donald; Smith, Matthew; Takanashi, Naohiro; Tokita, Kouichi; van der Heyden, Kurt; Yasuda, Naoki; Assef, Roberto; Barentine, John; Bender, Ralf; Blandford, Roger; Bremer, Malcolm; Brewington, Howard; Collins, Chris; Crotts, Arlin; Dembicky, Jack; Eastman, Jason; Edge, Alastair; Elson, Ed; Eyler, Michael; Filippenko, Alexei; Foley, Ryan; Frank, Stephan; Goobar, Ariel; Harvanek, Michael; Hopp, Ulrich; Ihara, Yutaka; Kahn, Steven; Ketzeback, William; Kleinman, Scott; Kollatschny, Wolfram; Krzesinski, Jurek; Leloudas, Giorgos; Long, Daniel; Lucey, John; Malanushenko, Elena; Malanushenko, Viktor; McMillan, Russet; Morgan, Christopher; Morokuma, Tomoki; Nitta, Atsuko; Ostman, Linda; Pan, Kaike; Romer, Kathy; Saurage, Gabrelle; Schlesinger, Katie; Snedden, Stephanie; Sollerman, Jesper; Stritzinger, Maximilian; Watson, Linda; Watters, Shannon; Wheeler, Craig; York, Donald (American Astronomical Society - The Astronomical Journal, 2008-05)
      This paper presents spectroscopy of supernovae discovered in the first season of the Sloan Digital Sky Survey-II Supernova Survey. This program searches for and measures multi-band light curves of supernovae in the ...
    • Flow boiling and pressure drop in parallel flow microchannels 

      Steinke, Mark; Kandlikar, Satish (American Society of Mechanical Engineers (ASME), 2003-04)
      The use of microchannels for advanced heat transfer applications has quickly become commonplace. They are found in automotive applications, fuel cells, and even electronics cooling. However, there are fundamental issues ...
    • Flow boiling heat transfer with binary and ternary mixtures in microfin tubes 

      Inoue, Nirihiro; Goto, asso; Kandlikar, Satish (American Society of Mechanical Engineers (ASME), 2000)
      An experimental setup was designed and fabricated to test the flow boiling heat transfer performance of microfin tubes. Five microfin tubes were tested with pure refrigerants. Two tubes were selected for further testing ...
    • Flow boiling maps for water, R-22 and R-134a in the saturated region 

      Kandlikar, Satish (International heat transfer conference, 1990-08)
      The development of a flow boiling map applicable to different fluids was reported by Kandlikar (1989). In the present paper, specific maps are presented for water, R-22 and R-134a in the saturated boiling region to serve ...
    • Fluid flow modeling for flip chip on board assembly 

      Venkatraman, P.; Ramkumar, S. Manian (SMTA: SMTA Pan Pacific Microelectronics Symposium, 2002)
    • Focal plane detector array developments 

      Ninkov, Zoran; Forrest, William (International Society for Optical Engineering (SPIE), 2002-06)
    • Formation of single-wall carbon nanotube superbundles 

      Gennett, Thomas; Dillon, Anne; Alleman, Jeffrey; Jones, K.; Hasoon, F.; Heben, Michael (The American Chemical Society: Chemistry of Materials, 2000-03)
      Since their discovery in 1993, carbon single-wall nanotubes (SWNTs) have been of great interest because of their expected novel electronic, mechanical, and gas adsorption properties. Difficulties arise in measuring these ...
    • Fractal dimensions in tunneling processes and effects of environmental fluctuations 

      Kovanis, Vassilios; Grigolini, Paolo; Kenkre, V.M.; Tsironis, George (World Scientific Publishing, 1998-03)
      We study electron tunneling between two infinte potential square wells connected via an opaque barrier and find that time evolution of the probability of the presence of a Gaussian wave packet, localized initially in one ...
    • Fractional correlations based on the modified fractional order Fourier transform 

      Almanasreh, Ahmed; Abushagur, Mustafa (Society of Photo-Optical Instrumentation Engineers (SPIE) - Optical Engineering, 1998-01)
      Based on the modified fractional order Fourier transform (MFROFT), we introduce a modified fractional correlation operation (MFCO). We propose two systems to implement the MFCO experimentally. These are analyzed ...
    • Frequency entrainment in optically injected semiconductor lasers 

      Varangis, Petros; Gavrielides, Athanasios; Erneux, Thomas; Kovanis, Vassilios; Lester, Luke (American Physical Society, 1997-03-24)
      We theoretically predict and experimentally demonstrate the phenomenon of frequency entrainment in optically injected semiconductor lasers. The laser exhibits nonlinear subharmonic and ultraharmonic resonances for appropriate ...
    • Frequency-to-voltage converter based on Bloch oscillations in a capacitively coupled GaAs-GaxAl1-xAs quantum well 

      Dunlap, David; Kovanis, Vassilios; Duncan, Robert; Simmons, Jerry (American Physical Society, 1993-09-15)
      A charged capacitor which is placed with a semiconductor in a closed loop will normally discharge in a characteristic time τ=1/RC. We show, however, that if a semiconductor of high purity is subjected to a rf bias with ...
    • From linearity towards chaos: Basic studies of relativistic backward-wave oscillators 

      Carmel, Y.; Lou, W.R.; Rodgers, J.; Guo, H.; Destler, William; Granatstein, V.L.; Levush, B.; Antonsen, T. Jr.; Bromborsky, A. (American Physical Society, 1992-09-14)
      Recent experimental studies have revealed for the first time some basic features of pulsed. relativistic (300-600 keY) backward-wave oscillators such as starting current, axial mode locking, and multifrequency operation. ...