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  • Evaluation of alternative techniques to determine pork carcass value 

    Akridge, Jay T.; Brorsen, B. Wade; Forrest, John C.; Kuei, Chu-hua; Schinckel, Allan P.; Brorsen, B. Wade (Journal of Animal Science, 2014-12-11)
    Three techniques for estimating the value of pork carcasses were evaluated: an optical probe, a real-time ultrasound scanner, and an electromagnetic scanner (EMSCAN). The ability of these techniques to predict carcass value ...
  • Highly sensitive terahertz measurement of layer thickness using a two-cylinder waveguide sensor 

    Theuer, M.; Beigang, R.; Grischkowsky, Daniel R.; Theuer, M.; Grischkowsky, Daniel R. (Applied Physics Letters, 2010-08-17)
    We report on the layer thickness determination on dielectrically coated metal cylinders using terahertz (THz) time-domain spectroscopy. A considerable sensitivity increase of up to a factor of 150 is obtained for layers ...
  • Adiabatic compression of terahertz waves using metal flares 

    Theuer, M.; Beigang, R.; Grischkowsky, Daniel R.; Theuer, M.; Grischkowsky, Daniel R. (Applied Physics Letters, 2010-05-14)
    We report on the adiabatic free-space coupling of broadband terahertz (THz) radiation through a subwavelength gap using metal flares. Amplitude coupling ratios better than 30% are obtained by optimizing the curvature. This ...
  • Flare coupled metal parallel-plate waveguides for high resolution terahertz time-domain spectroscopy 

    Theuer, M.; SreeHarsha, K. S.; Grischkowsky, Daniel R.; Theuer, M.; Grischkowsky, Daniel R. (Journal of Applied Physics, 2010-03-12)
    We report on a new coupling scheme for high resolution terahertz spectroscopy of microcrystalline films using parallel-plate waveguides. Metal flares are used to couple the terahertz radiation into and out of the waveguide. ...
  • Proboscis conditioning experiments with honeybees, Apis mellifera caucasica, with butyric acid and DEET mixture as conditioned and unconditioned stimuli 

    Abramson, Charles Ira; Giray, T.; Mixson, T. A.; Nolf, S. L.; Wells, Harrington; Kence, A.; Kence, M.; Abramson, Charles Ira; Nolf, S. L. (Journal of Insect Science, 2010)
    Three experiments are described investigating whether olfactory repellents DEET and butyric acid can support the classical conditioning of proboscis extension in the honeybee, Apis mellifera caucasica (Hymenoptera: Apidae). ...
  • High- Q terahertz Bragg resonances within a metal parallel plate waveguide 

    SreeHarsha, K. S.; Laman, N.; Grischkowsky, Daniel R.; SreeHarsha, K. S.; Grischkowsky, Daniel R. (Applied Physics Letters, 2009-03-06)
    One-dimensional (1D) Bragg waveguides are demonstrated at terahertz (THz) frequencies. Lithographically made 1D symmetric and asymmetric dielectric gratings on metallized high conductivity Si chips are incorporated within ...
  • Case for interdisciplinary environmental education and research 

    Focht, Will; Abramson, Charles Ira; Focht, Will; Abramson, Charles Ira (American Journal of Environmental Sciences, 2009)
    Problem statement: Interdisciplinary environmental education and research at American colleges and universities have been criticized for ambiguous focus, insufficient integration and lack of rigor. Part of the reason for ...
  • Factors affecting adoption of cow-calf production practices in Oklahoma 

    Ward, Clement E.; Vestal, M. K.; Doye, Damona Grace; Lalman, David L.; Ward, Clement E.; Lalman, David L.; Doye, Damona Grace (Journal of Agricultural and Applied Economics, 2008-12)
    Most technology adoption research has focused on crops. Primary data were used to determine differences in management practices among two groups of Oklahoma cow-calf producers based on herd size and cattle income dependence. ...
  • Nonclassical correlation of polarisation entangled photons in a biexciton-exciton cascade 

    Das, S.; Agarwal, Girish Saran; Das, S.; Agarwal, Girish Saran (Journal of Physics B: Atomic, Molecular and Optical Physics, 2008-11-10)
    We develop a theoretical model to study the Intensity-Intensity correlation of polarisation entangled photons emitted in a biexciton-exciton cascade. We calculate the degree of correlation and show how polarisation ...
  • Transport and quantum walk of nonclassical light in coupled waveguides 

    Rai, A.; Agarwal, Girish Saran; Perk, Jacques H. H.; Rai, A.; Perk, Jacques H. H.; Agarwal, Girish Saran (Physical Review A, 2008-10-08)
    We study the transport and quantum walk of nonclassical light in an array of coupled waveguides which have novel properties like very low decoherence and thus making them ideal for storage of quantum information. We show ...
  • Quantum interferences in cooperative Dicke emission from spatial variation of laser phase 

    Das, S.; Agarwal, Girish Saran; Scully, Marlan O.; Das, S.; Agarwal, Girish Saran (Physical Review Letters, 2008-10-06)
    We report generation of a new quantum interference effect in spontaneous emission from a resonantly driven system of two identical two-level atoms due to the spatial variation of the laser phase at the positions of the ...
  • Terahertz conductivity of thin metal films 

    Laman, N.; Grischkowsky, Daniel R.; Laman, N.; Grischkowsky, Daniel R. (Applied Physics Letters, 2008-08-05)
    The conductivities of thin Al, Au, and Ag films were measured via their transmission at terahertz frequencies. The conductivities of all the films, particularly the thinner films and Al films, were much smaller than their ...
  • Entanglement of two distant Bose-Einstein condensates by detection of Bragg-scattered photons 

    Deb, B.; Agarwal, Girish Saran; Agarwal, Girish Saran (Physical Review A, 2008-07-31)
    We show that it is possible to generate entanglement between two distant Bose-Einstein condensates by detection of Hanbury Brown-Twiss type correlations in photons Bragg-scattered by the condensates. Upon coincident detection ...
  • Quantum optical spring 

    Rai, A.; Agarwal, Girish Saran; Rai, A.; Agarwal, Girish Saran (Physical Review A, 2008-07-22)
    We study the dynamics of the quantum optical spring, i.e., a spring whose spring constant undergoes discrete jumps depending on the quantum state of another system. We show the existence of revivals and fractional revivals ...
  • Underlying terahertz vibrational spectrum of explosives solids 

    Melinger, J. S.; Laman, N.; Grischkowsky, Daniel R.; Laman, N.; Grischkowsky, Daniel R. (Applied Physics Letters, 2008-07-08)
    Using waveguide terahertz time-domain spectroscopy, we demonstrate the measurement of the underlying terahertz vibrational spectrum of the explosive solids hexahydro-1,3,5-trinitro-1,3,5-triazine, and 2,4,6-trinitrotoluene. ...
  • Photon-Photon Correlations as a Probe of Vacuum Induced Coherence Effects 

    Das, S.; Agarwal, Girish Saran; Das, S.; Agarwal, Girish Saran (Physical Review A, 2008-03-27)
    We present new experimental implications of the effects of vacuum induced coherence on the photon -photon correlation in the pi-polarized fluorescence in j = 1/2 to j = 1/2 transition. These effects should be thus observable ...
  • Electromagnetic field induced modification of branching ratios for emission in structured vacuum 

    Das, S.; Agarwal, Girish Saran; Das, S.; Agarwal, Girish Saran (New Journal of Physics, 2008-01-17)
    We report a fundamental effect of the electromagnetic field induced modification of the branching ratios for emission into several final states. The modifications are especially significant if the vacuum into which the ...
  • Factors affecting adoption of recommended management practices in stocker cattle production 

    Johnson, Rachel J.; Doye, Damona Grace; Lalman, David L.; Peel, Derrell S.; Raper, Kellie; Chung, Chanjin; Johnson, Rachel J.; Lalman, David L.; Peel, Derrell S.; Raper, Kellie; Chung, Chanjin; Doye, Damona Grace (Journal of Agricultural and Applied Economics, 2008)
    Binary logit regression models were used to estimate factors affecting adoption of recommended management practices (RMPs). Variables analyzed include aspects of farm structure, human capital, farm objectives, and production ...
  • Determining returns to storage: Does data aggregation matter? 

    Klumpp, J.; Brorsen, B. Wade; Anderson, Kim Barry; Klumpp, J.; Anderson, Kim Barry; Brorsen, B. Wade (Journal of Agricultural and Applied Economics, 2007-12)
    Aggregate data are commonly used to determine returns to storage. However, recent studies have shown that aggregating data may lead to underestimated returns. This article compares aggregate and elevator data from Oklahoma ...
  • Integrated waveguide-coupled terahertz microcavity resonators 

    George, P. A.; Manolatou, Christina; Rana, F.; Bingham, A. L.; Grischkowsky, Daniel R.; Bingham, A. L.; Grischkowsky, Daniel R. (Applied Physics Letters, 2007-11-09)
    We demonstrate integrated square terahertz microcavity resonators side coupled to waveguides. We present the microcavity transmission spectra for different resonator sizes and coupling strengths. The measured quality factors ...

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