Search Results - "Lewis, S.R"

Eight-year climatology of dust optical depth on Mars by Montabone, L., Forget, F., Millour, E., Wilson, R.J., Lewis, S.R., Cantor, B., Kass, D., Kleinböhl, A., Lemmon, M.T., Smith, M.D., Wolff, M.J.

“…[Display omitted] •We have produced a multiannual climatology of the dust distribution on Mars.•We grid retrievals of column dust optical depth from 3…”
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Enhanced water loss from the martian atmosphere during a regional-scale dust storm and implications for long-term water loss by Holmes, J.A., Lewis, S.R., Patel, M.R., Chaffin, M.S., Cangi, E.M., Deighan, J., Schneider, N.M., Aoki, S., Fedorova, A.A., Kass, D.M., Vandaele, A.C.

“…•Hydrogen escape during regional dust storms on Mars display interannual variations.•Escape rate during Mars Year 34 C storm equivalent to global dust storm…”
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Evidence for thermal-stress-induced rockfalls on Mars impact crater slopes by Tesson, P.-A., Conway, S.J., Mangold, N., Ciazela, J., Lewis, S.R., Mège, D.

“…Here we study rocks falling from exposed outcrops of bedrock, which have left tracks on the slope over which they have bounced and/or rolled, in fresh impact…”
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The martian daytime convective boundary layer: Results from radio occultation measurements and a mesoscale model by Hinson, D.P., Tyler, D., Lewis, S.R., Pätzold, M., Tellmann, S., Häusler, B., Tyler, G.L.

“…We investigate the behavior of the Martian daytime convective boundary layer (CBL) through a combination of data analysis and modeling. This study relies on…”
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Single-chip surface micromachined integrated gyroscope with 50°/h Allan deviation by Geen, J.A., Sherman, S.J., Chang, J.F., Lewis, S.R.

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Numerical simulations of droplet train and free surface jet impingement by Lewis, S.R., Anumolu, L., Trujillo, M.F.

“…•The impingement heat transfer of a droplet train and free surface jet is compared numerically.•Results show that both jet configurations have higher cooling…”
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Field measurements of horizontal forward motion velocities of terrestrial dust devils: Towards a proxy for ambient winds on Mars and Earth by Balme, M.R., Pathare, A., Metzger, S.M., Towner, M.C., Lewis, S.R., Spiga, A., Fenton, L.K., Renno, N.O., Elliott, H.M., Saca, F.A., Michaels, T.I., Russell, P., Verdasca, J.

“…► We measured the speed dust devils (DDs) move across the ground on Earth. ► Long baseline stereo imaging allowed ground motion of >100 DDs to be measured. ►…”
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The effects of the martian regolith on GCM water cycle simulations by Böttger, H.M., Lewis, S.R., Read, P.L., Forget, F.

“…This paper describes General Circulation Model (GCM) simulations of the martian water cycle focusing on the effects of an adsorbing regolith. We describe the…”
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An integrated force-balanced capacitive accelerometer for low- g applications by Chau, K.H.-L, Lewis, S.R, Zhao, Y, Howe, R.T, Bart, S.F, Marcheselli, R.G

“…A low-cost monolithic accelerometer which incorporates a surface-micromachined polysilicon sensor with bipolar/MOS interface circuitry on a single chip has…”
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Assessment of laser cladding as an option for repairing/enhancing rails by Lewis, S.R., Lewis, R., Fletcher, D.I.

“…This paper presents results of testing carried out to assess the wear and RCF performance of laser clad rail. Stronger and harder materials can be laser clad…”
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Videolaryngoscopy versus direct laryngoscopy for adult patients requiring tracheal intubation: a Cochrane Systematic Review by Lewis, S. R., Butler, A. R., Parker, J., Cook, T. M., Schofield-Robinson, O. J., Smith, A. F.

“…Abstract Difficulties with tracheal intubation commonly arise and impact patient safety. This systematic review evaluates whether videolaryngoscopes reduce…”
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Investigation of the influence of rail hardness on the wear of rail and wheel materials under dry conditions (ICRI wear mapping project) by Lewis, R., Christoforou, P., Wang, W.J., Beagles, A., Burstow, M., Lewis, S.R.

“…Some railway managers and practitioners fear that introducing premium rail materials will have a detrimental effect on the wheels of trains that use the line…”
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Baroclinic Wave Transitions in the Martian Atmosphere by Collins, M., Lewis, S.R., Read, P.L., Hourdin, F.

“…Surface pressure data from the Viking Lander mission and from GCM simulations of the martian atmosphere have been analyzed using singular systems analysis…”
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An eight-year climatology of the martian northern polar vortex by Streeter, P.M., Lewis, S.R., Patel, M.R., Holmes, J.A., Rajendran, K.

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Laser cladding of rail; the effects of depositing material on lower rail grades by Lu, P., Lewis, S.R., Fretwell-Smith, S., Engelberg, D.L., Fletcher, D.I., Lewis, R.

“…This paper presents a study comparing the wear performance of laser clad rails. A grade of martensitic stainless steel (MSS) was deposited on two substrate…”
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Full-scale testing of laser clad railway track; Case study – Testing for wear, bend fatigue and insulated block joint lipping integrity by Lewis, S.R., Lewis, R., Goodwin, P.S., Fretwell-Smith, S., Fletcher, D.I., Murray, K., Jaiswal, J.

“…This paper reports on a series of tests which were carried out on full-scale sections of rail that had been treated by laser cladding aiming to create a layer…”
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Improving rail wear and RCF performance using laser cladding by Lewis, S.R., Fretwell-Smith, S., Goodwin, P.S., Smith, L., Lewis, R., Aslam, M., Fletcher, D.I., Murray, K., Lambert, R.

“…Laser cladding has been considered as a method for improving the wear and RCF performance of standard grade rail. This paper presents results of small scale…”
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The role of slip ratio in rolling contact fatigue of rail materials under wet conditions by Wang, W.J., Lewis, S.R., Lewis, R., Beagles, A., He, C.G., Liu, Q.Y.

“…Rolling contact fatigue (RCF) of rail is a significant factor affecting the maintenance and service safety of railway track. While the driving parameters are…”
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Experimental study of sediment transport processes by liquid water and brine under Martian pressure by Philippe, M., Conway, S.J., Raack, J., Carpy, S., Massé, M., Patel, M.R., Sylvest, M.E., Lewis, S.R., Morino, C.

“…We present here an experimental study to compare the behaviour of water and brine releases over loose sediments under present-day Martian pressure. Water has…”
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Diurnal variation in martian dust devil activity by Chapman, R.M., Lewis, S.R., Balme, M., Steele, L.J.

“…•Modelled Martian dust devil activity occurs earlier in the sol than expected.•Peak dust devil activity occurs during morning hours across multiple areas.•Dust…”
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