Now showing items 1734-1753 of 2686

    • The physical origin of negative superhumps in cataclysmic variables 

      Wood, Matt A.; Burke, Christopher J. (2007-06-01)
      It has been suspected for over 20 years that the observed negative superhumps in cataclysmic variables are due to the retrograde precession of a tilted disk. We present new smooth particle hydrodynamics simulation results ...
    • The physical properties of double degenerate common proper motion binaries 

      Sión, Edward M.; Oswalt, T. D.; Liebert, James W.; Hintzen, Paul M N (1991-04)
      We present spectral types and spectrophotometry for 21 double degenerate (DD) common proper motion binaries and provide estimates of their colors, absolute visual and bolometric magnitudes, and cooling ages. The most typical ...
    • Physical-Virtual Patient Bed 

      Daher, Salam (2017-08-28)
      Currently healthcare practitioners use patient simulators such as actors, mannequins, and computer based simulations for learning and training.I am exploring effects of co-locating sensory cues (i.e. visual and haptic) vs ...
    • Physics first 

      Alonso, Marcelo Fernandez (2003-12)
      It is true that now most biology courses begin with the DNA molecule, and many chemistry courses introduce the notion of electronic orbitals in atoms and molecules, topics for which students are not well prepared, since ...
    • Phytotoxicity of Silver Nitrate and Silver Nanoparticles on Elodea canadensis 

      Bernas, Leonard
      This project demonstrates that Elodea canadensis, a common aquatic plant, can absorb silver cations and silver nanoparticles from its environment. E. canadensis was chosen for study because it is a model aquatic plant for ...
    • Phytotoxicity of Silver Species to Egeria Densa and Applications to Phytoremediation 

      Bernas, Leonard James (2016-12)
      Silver species pose a significant threat to aquatic ecosystems because the use of silver nanoparticles (AgNps) for industrial applications is significantly increasing, as are discharges into waterways. The effects have ...
    • Pilots' Likelihood to Quit Flying in Part 121 Commercial Aviation 

      Tamilselvan, Gajapriya (2018-04)
      The purpose of the study was to develop a statistical model representing predictors to anticipate pilots’ likelihood to quit flying in Part 121 Commercial Aviation. The study was primarily focused on the current Part 121 ...
    • Pitch angle scattering in the outer heliosheath and formation of the interstellar boundary explorer ribbon 

      Gamayunov, Konstantin V.; Zhang, Ming; Rassoul, Hamid K. (2010-12-06)
      The dominant and unexpected feature in the first Interstellar Boundary EXplorer (IBEX) maps is a ribbon of the enhanced energetic neutral atom (ENA) emissions. Presenting the first results from IBEX, McComas et al. identified ...
    • Pitch angle scattering in the outer heliosheath and formation of the Interstellar Boundary EXplorer ribbon 

      Gamayunov, Konstantin V.; Zhang, Ming; Rassoul, Hamid K. (2010-12-06)
      The dominant and unexpected feature in the first Interstellar Boundary EXplorer (IBEX) maps is a ribbon of the enhanced energetic neutral atom (ENA) emissions. Presenting the first results from IBEX,McComas et al. identified ...
    • A pixel to pixel hyperspectral synthetic image model inter-comparison study 

      Bostater, Charles R.; Bassetti, Luce (2006-10-06)
      The purpose of this paper is to present simulation results comparing e a Monte Carlo Hyperspectral Simulation Model (MCHSIM) which generates synthetic images with realistic water wave surface to an iterative layered radiative ...
    • Pixel-registered image fusion 

      Cofer, Rufus H.; Kozaitis, S.P. (1995-07-05)
      One of the highest potential uses of image fusion is that of recognition of critical targets. The continuing image fusion question then is how to make optimal use of the often disparate forms of encountered image detail ...
    • PKS 0736+017: A striking optical flare and intriguing microvariability 

      Clements, Sandra D.; Jenks, A.; Torres, Y. (2003-07)
      The compact, flat-spectrum radio quasar PKS 0736+017 was monitored for microvariability on 10 nights in early 2002 using the 0.9 m SARA telescope on Kitt Peak in Arizona. On January 14, PKS 0736+017 flared dramatically, ...
    • Planar Electromagnetic Band Gap for Broadband Switching Noise Mitigation in High-Speed PCB 

      Nguyen, Kevin H (2017-05)
      Electromagnetic band gap (EBG) structure with novel meandered lines for mitigation of simultaneous switching noise (SSN) from multiple switch mode power supplies on a high speed digital circuit card assembly is investigated. ...
    • Planet hunters: A transiting circumbinary planet in a quadruple star system 

      Schwamb, Megan E.; Orosz, Jerome A.; Carter, Joshua A.; Welsh, William F.; Fischer, Debra A.; Torres, Guillermo; Howard, Andrew W.; Crepp, Justin R.; Keel, William C.; Lintott, Chris J. (2013-05-10)
      We report the discovery and confirmation of a transiting circumbinary planet (PH1b) around KIC 4862625, an eclipsing binary in the Kepler field. The planet was discovered by volunteers searching the first six Quarters ...
    • Planetary candidates observed by Kepler iv: Planet sample from Q1-Q8 (22 months) 

      Ragozzine, Darin A.; Burke, Christopher J.; Bryson, Stephen T.; Mullally, Fergal R.; Rowe, Jason F.; Christiansen, Jessie L.; Thompson, Susan E.; Coughlin, Jeffrey L.; Haas, Michael R.; Batalha, Natalie M. (2014-01-10)
      We provide updates to the Kepler planet candidate sample based upon nearly two years of high-precision photometry (i.e., Q1-Q8). From an initial list of nearly 13,400 threshold crossing events, 480 new host stars are ...
    • PLANKTONIC FORAMINIFERA COLLECTED BY THE R/V MELVILLE (1972) IN THE SOUTHWEST ATLANTIC 

      Lena, Haydee; Watanabe, Silvia; Souto, Sara (1981)
      The planktonic foraminiferal fauna was studied from 186 samples collected by the R/V Melville in the Southwest Atlantic Ocean during 1972. The samples were collected in the surface layer (horizontal tows) and throughout ...
    • Plant pigment types, distributions, and influences on shallow water submerged aquatic vegetation mapping 

      Hall, Carlton R.; Bostater, Charles R.; Virnstein, Robert W. (2004-11)
      Development of robust protocols for use in mapping shallow water habitats using hyperspectral imagery requires knowledge of absorbing and scattering features present in the environment. These include, but are not limited ...
    • Platforms for hyperspectral imaging, in-situ optical and acoustical imaging in urbanized regions 

      Bostater, Charles R.; Oney, Taylor (2016-09-26)
      Hyperspectral measurements of the water surface of urban coastal waters are presented. Oblique bidirectional reflectance factor imagery was acquired made in a turbid coastal sub estuary of the Indian River Lagoon, Florida ...
    • Pleading innocents: laboratory evidence of plea bargaining's innocence problem 

      Edkins, Vanessa A.; Dervan, Lucian E. (2013-05-12)
      We investigated plea bargaining by making students actually guilty or innocent of a cheating offense and varying the sentence that they would face if found ‘guilty’ by a review board. As hypothesized, guilty students ...
    • Polarimetry and the high-energy emission mechanisms in quasar jets: the case of PKS 1136-135 

      Cara, Mihai; Perlman, Eric S.; Uchiyama, Yasunobu; Cheung, Chi C.; Coppi, Paolo S.; Georganopoulos, Markos; Worrall, Diana M.; Birkinshaw, Mark; Sparks, William B.; Marshall, Herman L. (2013-08-20)
      Since the discovery of kiloparsec-scale X-ray emission from quasar jets, the physical processes responsible for their high-energy emission have been poorly defined. A number of mechanisms are under active debate, including ...