Search Results - "Cofer, W."

Estimating fire emissions and disparities in boreal Siberia (1998–2002) by Soja, Amber J., Cofer, W. Randy, Shugart, Herman H., Sukhinin, Anatoly I., Stackhouse Jr, Paul W., McRae, Douglas J., Conard, Susan G.

“…In the biomass, soils, and peatlands of Siberia, boreal Russia holds one of the largest pools of terrestrial carbon. Because Siberia is located where some of…”
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Airborne observations of aircraft aerosol emissions I: Total nonvolatile particle emission indices by Anderson, B. E., Cofer, W. R., Bagwell, D. R., Barrick, J. W., Hudgins, C. H., Brunke, K. E.

“…We report airborne measurements of total and nonvolatile (at T < 290°C) fine and ultrafine aerosol emission indices (EI's) generated by a variety of jet…”
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Crown fire emissions of CO2, CO, H2, CH4, and TNMHC from a dense Jack pine boreal forest fire by Cofer III, W. R., Winstead, E. L., Stocks, B. J., Goldammer, J. G., Cahoon, D. R.

“…Samples of high‐intensity crown fire smoke were collected using a helicopter during the International Crown Fire Modeling Experiment near Fort Providence,…”
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Seasonal distribution of African savanna fires by Cahoon, Donald R., Jr, Stocks, Brian J., Levine, Joel S., Cofer, Wesley R., III, O'Neill, Katherine P.

“…The temporal and spatial distribution of savanna fires over the entire African continent, as determined from nighttime satellite imagery, is described. It is…”
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Application of Dynamic System Identification to Timber Beams. I by Peterson, S. T, McLean, D. I, Symans, M. D, Pollock, D. G, Cofer, W. F, Emerson, R. N, Fridley, K. J

“…In this first part of a two-part paper, development of a method of dynamic system identification for timber beams is presented with an analytical verification…”
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An assessment of aircraft as a source of particles to the upper troposphere by Anderson, B. E., Cofer, W. R., Crawford, J., Gregory, G. L., Vay, S. A., Brunke, K. E., Kondo, Y., Koike, M., Schlager, H., Baughcum, S. L., Jensen, E., Zhao, Yongjing, Kita, Kazuyuki

“…Condensation nuclei measurements are examined in conjunction with measurements of reactive nitrogen species (NOy) to identify aircraft plumes in primary air…”
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The effect of sensory feedback on crayfish posture and locomotion: I. Experimental analysis of closing the loop by Chung, Bryce, Bacqué-Cazenave, Julien, Cofer, David W, Cattaert, Daniel, Edwards, Donald H

“…The effect of proprioceptive feedback on the control of posture and locomotion was studied in the crayfish Procambarus clarkii (Girard). Sensory and motor…”
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Airborne observations of aircraft aerosol emissions II: Factors controlling volatile particle production by Anderson, B. E., Cofer, W. R., Barrick, J. D., Bagwell, D. R., Hudgins, C. H.

“…Airborne measurements of fine and ultrafine aircraft aerosol emissions are examined as a function of environmental conditions, fuel sulfur content, and…”
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The effect of sensory feedback on crayfish posture and locomotion: II. Neuromechanical simulation of closing the loop by Bacqué-Cazenave, Julien, Chung, Bryce, Cofer, David W, Cattaert, Daniel, Edwards, Donald H

“…Neuromechanical simulation was used to determine whether proposed thoracic circuit mechanisms for the control of leg elevation and depression in crayfish could…”
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New estimates of nitrous oxide emissions from biomass burning by Cofer, W. R., III, Levine, J. S., Winstead, E. L., Stocks, B. J.

“…The recent discovery of an artifact producing increased levels of N2O in combustion gas samples collected and stored in grab bottles before chemical analysis…”
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Chemical ionization mass spectrometric measurements of SO2 emissions from jet engines in flight and test chamber operations by Hunton, D. E., Ballenthin, J. O., Borghetti, J. F., Federico, G. S., Miller, T. M., Thorn, W. F., Viggiano, A. A., Anderson, B. E., Cofer, W. R., McDougal, D. S., Wey, C. C.

“…We report the results of two measurements of the concentrations and emission indices of gas‐phase sulfur dioxide (EI(SO2)) in the exhaust of an F100–200E…”
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SOx oxidation and volatile aerosol in aircraft exhaust plumes depend on fuel sulfur content by Miake-Lye, R. C., Anderson, B. E., Cofer, W. R., Wallio, H. A., Nowicki, G. D., Ballenthin, J. O., Hunton, D. E., Knighton, W. B., Miller, T. M., Seeley, J. V., Viggiano, A. A.

“…Volatile and nonvolatile aerosols were measured in the wake of a B757 airliner in flight, in concert with measurements of gaseous SOx and CO2 emissions, while…”
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Application of Dynamic System Identification to Timber Beams. II by Peterson, S. T, McLean, D. I, Symans, M. D, Pollock, D. G, Cofer, W. F, Emerson, R. N, Fridley, K. J

“…In a companion paper, a method of global nondestructive evaluation (NDE) for identifying local damage and decay in timber beams was developed and verified…”
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Introducing MantisBot: Hexapod robot controlled by a high-fidelity, real-time neural simulation by Szczecinski, Nicholas S., Chrzanowski, David M., Cofer, David W., Terrasi, Andrea S., Moore, David R., Martin, Joshua P., Ritzmann, Roy E., Quinn, Roger D.

“…We present MantisBot, a 28 degree of freedom robot controlled by a high-fidelity neural simulation. It is modeled after the mantis, with many degrees of…”
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Base isolation and supplemental damping systems for seismic protection of wood structures; literature review by Symans, Michael D, Cofer, William F, Fridley, Kenneth J

“…This paper provides a literature review on the application of base isolation and supplemental damping systems for seismic protection of wood structures. The…”
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Reliability of Reused Sawn Lumber: Effect of Fastener Holes by Fridley, Kenneth J, Williams, Judsen M, Cofer, William F

“…The results of a comprehensive research study on the effect of fastener holes on the reliability of structural timbers, specifically No. 2 Douglas fir 102 ×…”
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Improved aqueous scrubber for collection of soluble atmospheric trace gases by Cofer, Wesley R, Collins, Vernon G, Talbot, Robert W

“…A new concentration technique for the extraction and enrichment of water-soluble atmospheric trace gases has been developed. The gas scrubbing technique…”
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Biomass burning: a driver for global change by Levine, J.S. (NASA Langley Research Center, Hampton, VA.), Cofer, W.R. III, Cahoon, D.R. Jr, Winstead, E.L

“…Field experiments and satellite data are helping scientists better understand the effects of burning biomass on the environment. Biomass burning is recognized…”
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Calibration and demonstration of a condensation nuclei counting system for airborne measurements of aircraft exhausted particles by Cofer, Wesley R., Anderson, Bruce E., Winstead, Edward L., Bagwell, Donald R.

“…A system of multiple continuous-flow condensation nuclei counters (CNC) was assembled, calibrated, and demonstrated on a NASA T-39 Sabreliner jet aircraft. The…”
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Seismic behavior of wood-framed structures with viscous fluid dampers by Symans, Michael D, Cofer, William F, Du, Ying, Fridley, Kenneth J

“…The suitability of viscous fluid dampers for seismic protection of light-framed wood buildings is investigated in this paper. Nonlinear finite-element models…”
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