20,967 research outputs found
Wheat Cleaning and its Effect on U.S. Wheat Exports
This analysis shows that there could be net gains to the U.S. wheat industry if all U.S. export wheat were to be cleaned to a dockage level between 0.35 to 0.40 percent. These results are based on survey results of major importers of U.S. wheat, and a model of world wheat trade. Larger benefits to the U.S. wheat industry would be possible from cleaning only wheat destined to countries that demand higher quality U.S. wheat. However, these gains in export revenue from selling cleaner wheat could be offset if other exporters, especially Canada, responded in ways that would maintain their market share.wheat, grain quality, trade model, Crop Production/Industries, International Relations/Trade,
Application of digital analysis of MSS data to agro-environmental studies
There are no author-identified significant results in this report
Microwave-Induced Dephasing in One-Dimensional Metal Wires
We report on the effect of monochromatic microwave (MW) radiation on the weak
localization corrections to the conductivity of quasi-one-dimensional (1D)
silver wires. Due to the improved electron cooling in the wires, the MW-induced
dephasing was observed without a concomitant overheating of electrons over wide
ranges of the MW power and frequency . The observed dependences of
the conductivity and MW-induced dephasing rate on and are in
agreement with the theory by Altshuler, Aronov, and Khmelnitsky \cite{Alt81}.
Our results suggest that in the low-temperature experiments with 1D wires,
saturation of the temperature dependence of the dephasing time can be caused by
an MW electromagnetic noise with a sub-pW power.Comment: 4 pages with 4 figures, paper revised, accepted by Phys Rev Let
Generation and measurement of nonstationary random processes technical note no. 3
Generation and measurement of nonstationary stochastic processes related to Monte Carlo studies with analog compute
Multiangle static and dynamic light scattering in the intermediate scattering angle range
We describe a light scattering apparatus based on a novel optical scheme
covering the scattering angle range 0.5\dg \le \theta \le 25\dg, an
intermediate regime at the frontier between wide angle and small angle setups
that is difficult to access by existing instruments. Our apparatus uses
standard, readily available optomechanical components. Thanks to the use of a
charge-coupled device detector, both static and dynamic light scattering can be
performed simultaneously at several scattering angles. We demonstrate the
capabilities of our apparatus by measuring the scattering profile of a variety
of samples and the Brownian dynamics of a dilute colloidal suspension
The Subillimeter Properties of Extremely Red Objects in the CUDSS Fields
We discuss the submillimeter properties of Extremely Red Objects (EROs) in
the two Canada-UK Deep Submillimeter Survey (CUDSS) Fields. We measure the mean
submillimeter flux of the ERO population (to K < 20.7) and find 0.4 +/- 0.07
mJy for EROs selected by (I-K) > 4.0 and 0.56 +/- 0.09 mJy for EROs selected by
(R-K) > 5.3 but, these measurements are dominated by discrete, bright
submillimeter sources. We estimate that EROs produce 7-11% of the far-infrared
background at 850um. This is substantially less than a previous measurement by
Wehner, Barger & Kneib (2002) and we discuss possible reasons for this
discrepancy. We show that ERO counterparts to bright submillimeter sources lie
within the starburst region of the near-infrared color-color plot of Pozzetti &
Mannucci (2000). Finally, we claim that pairs or small groups of EROs with
separations of < 10 arcseconds often mark regions of strong submillimeter flux.Comment: 9 pages, 8 figures, accepted for publication in Ap
Decoherence and Quantum Fluctuations
We show that the zero-point fluctuations of the intrinsic electromagnetic
environment limit the phase coherence time in all mesoscopic systems at low
temperatures. We derive this quantum noise limited dephasing time and its
temperature dependence in the crossover to the thermal regime. Our results
agree well with most experiments in 1D systems.Comment: 4 pages & 1 figur
Instructing Students How to Use Evidence-based Technology Interventions with Older Adults
Current evidence supports the use of technology with older adults and the Accreditation Council for Occupational Therapy Education standards for entry-level occupational therapy programs mandate instruction on the use of technology to support occupational performance. The literature does not clearly define specific strategies to teach entry-level occupational therapy students how to implement technology interventions with older adults. The purpose of this paper is to provide OT educators with recommendations for teaching entry-level students to use evidence-based technology with older adults. The authors reviewed current literature. The recent evidence helped the authors define practical curriculum recommendations for instructing entry-level occupational therapy students to integrate technology into older adults’ interventions. Recommendations include use of telehealth visits, teleconferencing, iPad applications, smart phone applications, texting, emails, and video applications. With technology continually changing, occupational therapy instructors must increase their awareness of new applications and computer programs that occupational therapists can utilize in older adult interventions to maximize knowledge translation to their students
Interaction effects among two-dimensional electrons and holes
We report large logarithmic corrections to the conductivity of two-dimensional electrons and holes in GaSb-InAs-GaSb double heterostructures. From ∼ 40 mK to 1 K, the conductivity increased with the logarithm of the temperature but with a slope as much as 30 times larger than estimated from the theories of weak localization and carrier interaction. The discrepancy apparently results from electron-hole interactions not included in the theory
Interaction Effects Among Two-Dimensional Electrons and Holes
We report large logarithmic corrections to the conductivity of two-dimensional electrons and holes in GaSb-InAs-GaSb double heterostructures. From ∼ 40 mK to 1 K, the conductivity increased with the logarithm of the temperature but with a slope as much as 30 times larger than estimated from the theories of weak localization and carrier interaction. The discrepancy apparently results from electron-hole interactions not included in the theory
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