2,536 research outputs found
BENEFIT CAPTURE: EVIDENCE FROM A RIVER CORRIDOR BENEFIT COST EVALUATION
The concept of and evidence for benefit capture are explored in a benefit cost analysis of selected water quality and infrastructure improvements in the Muskingum River corridor of South Eastern Ohio. Property tax revenues and CVM bid functions are estimated and implications for benefit capture and further research are developed.Resource /Energy Economics and Policy,
Gas-injection valve operates at high speed
Fast acting gas valve is used for injecting a short pulse of gas into a vacuum chamber during plasma acceleration experiments. It contains a lightweight closure disk that is forced away from the valve seat when an electromagnetic coil is momentarily energized and immediately rebounds from a stop back onto the seat
FLEXSTAB analysis
The wing differential pressure distributions of two vehicles are predicted using FLEXSTAB. Three space shuttle configurations were investigated. Comparisons were made of wind tunnel and analytical data for a selected range of angle of attack, angle of sideslip, and Mach number. A drone-type vehicle was investigated and comparisons were made between flight and analytical data of wing pressure distributions and static longitudinal stability derivatives
Experimental determination of cosmic ray charged particle intensity profiles in the atmosphere
Absolute cosmic-ray free air ionization and charged particle fluxes and dose rates throughout the atmosphere were measured on a series of balloon flights that commenced in 1968. Argon-filled ionization chambers equipped with solid-state electrometers, with different gas pressures and steel wall thicknesses, and a pair of aluminum-wall Gm counters have provided the basic data. These data are supplemented by measurements with air-filled and tissue equivalent ionization chambers and a scintillation spectrometer. Laboratory experiments together with analyses of the theoretical aspects of the detector responses to cosmic radiation indicate that these profiles can be determined to an overall accuracy of + or - 5 percent
Exercise Prior to Pregnancy Enhances the Suppressive Function of Tregs in Offspring in a Mouse Model of Asthma
Regulatory T cells (Tregs) are a specialized subset of T cells responsible for peripheral tolerance and the mediation of inappropriate immune responses, such as those seen in asthma and allergy. Our lab is interested in the role that exercise plays in Treg responses. Using a mouse model of asthma, we have shown that exercise increases both the number and suppressive function of Tregs. It has been shown that exposing nursing dams to allergens confers protection against airway hyperresponsiveness and inflammation (trademarks of asthma) in pups exposed to the same allergen. In the present study, we wanted to determine if the exercise-induced increase in number and suppressive function of Tregs would be similarly passed from dams to their pups. Male pups from dams that were exercised prior to pregnancy (E) and pups from sedentary dams (S) were OVA-sensitized and challenged beginning at 4wks of age. Mice were sacrificed and tissues were taken for cell analysis. When co-cultured with CD4+CD25- responder cells, Tregs from E pups enhanced suppression of responder cells between 8.4-10% when compared to Tregs from S pups. While the number of Tregs from the mediastinal lymph node was not significantly different between E and S pups, there was a significant decrease in the number of CD4+ and CD8+ T cells in E pups from S pups (51.24% + 10.2 vs. 33.51% + 3.3 and 21.42% + 7.3 vs. 12.94% + 1.2, respectively), indicating a reduction in cellular infiltration and a muted immune response to allergen. Although not significant, there was a doubling of the number of Tregs in the thymus and bone marrow of E pups compared to S pups. This study indicates that exercise prior to pregnancy may confer some Treg-mediated protection against asthma
Investigation of DC-8 nacelle modifications to reduce fan-compressor noise in airport communities. Part 3 - Static tests of noise suppressor configurations, May 1967 - October 1969
Static tests of noise suppressor configurations of DC-8 aircraft nacelle modifications to reduce fan-compressor noise levels - Part
New Predictions for Neutrino Telescope Event Rates
Recent measurements of the small- deep-inelastic regime at HERA translate
to new expectations for the neutrino-nucleon cross section at ultrahigh
energies. We present event rates for large underground neutrino telescopes
based on the new cross section for a variety of models of neutrino production
in Active Galactic Nuclei, and we compare these rates with earlier cross
section calculations.Comment: Talk presented by I. Sarcevic at the VIth International Workshop on
Theoretical Aspects of Underground Physics, Toledo, Spain, September 17-21,
1995, 3 p
An experiment to measure the energy spectrum of cosmic ray antiprotons from 100 to 1000 MeV
Production models were developed and the confirmation of each one had significant astrophysical impact. These include radical modifications of propagation models, cosmic ray antiprotons injection from neighboring domains of antimatter, p production by evaporating primordial black holes, and cosmic ray p's as annihilation products of supersymmetry particles that might make up the dark dynamical mass of the Galaxy. It is that p's originating from supersymmetric parents might have distinct spectral features that would survive solar modulation; in one model, higgsino annihilation proceeds through the bb quark-antiquark channel, producing a spectral bump at approx. 0.3 GeV in the p spectrum
Investigation of DC-8 nacelle modifications to reduce fan-compressor noise in airport communities. Part 4 - Flight acoustical and performance evaluations, for period May 1967 - October 1969
Flight acoustical and performance evaluations of DC 8 nacelle modifications to reduce fan-compressor noise in airport communitie
Comparative genomic analyses reveal a lack of a substantial signature of host adaptation in Rhodococcus equi (‘Prescottella equi’)
Rhodococcus equi (‘Prescottella equi’) is a pathogenic actinomycete primarily infecting horses but has emerged as an opportunistic human pathogen. We have sequenced the genome of the type strain of this species, R. equi strain C7T, and compared the genome with that of another foal isolate 103S and of a human isolate ATCC 33707. The R. equi strains are closely related to each other and yet distantly related to other rhodococci and Nocardia brasiliensis. The comparison of gene contents among R. equi strains revealed minor differences that could be associated with host adaptation from foals to humans, including the presence of a paa operon in the human isolate, which is potentially involved in pathogenesis
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