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A numerical model of 100 m and 200 m world class sprinting performances is modified using standard hydrodynamic principles to include effects of air temperature, pressure, and humidity levels on aerodynamic drag. The magnitude of the…

Popular Physics · Physics 2009-11-11 J. R. Mureika

The reliability of astronomical observations at millimeter and sub-millimeter wavelengths closely depends on a low vertical content of water vapor as well as on high atmospheric emission stability. Although Concordia station at Dome C…

Instrumentation and Methods for Astrophysics · Physics 2015-06-04 S. De Gregori , M. De Petris , B. Decina , L. Lamagna , J. R. Pardo , B. Petkov , C. Tomasi , L. Valenziano

Far-infrared continuum data from the {\it COBE}/{\it DIRBE} instrument were combined with Nagoya 4-m $\cOone$ spectral line data to infer the multiparsec-scale physical conditions in the Orion$ $A and B molecular clouds, using…

Astrophysics · Physics 2008-11-26 W. F. Wall

We describe a set-up for studying adsorption of helium in silica aerogels, where the adsorbed amount is easily and precisely controlled by varying the temperature of a gas reservoir between 80 K and 180 K. We present validation experiments…

Soft Condensed Matter · Physics 2008-12-18 Benjamin Cross , Laurent Puech , Pierre-Etienne Wolf

This paper reports on the performance of Resistive Plate Chambers (RPCs) as function of the gas flow rate through the chambers and of environmental conditions, such as atmospheric pressure, ambient temperature and air humidity. The chambers…

Instrumentation and Detectors · Physics 2010-05-07 Burak Bilki , John Butler , Ed May , Georgios Mavromanolakis , Edwin Norbeck , Jose Repond , David Underwood , Lei Xia , Qingmin Zhang

For near-Sun missions, the spacecraft approaches very close to the Sun and space environmental effects become relevant. Strong restrictions on how much close it can get derive from the maximum temperature that the used materials can stand,…

Space Physics · Physics 2017-10-25 Elena Ancona , Roman Ya. Kezerashvili

Using data from the Southern Galactic Plane Survey (SGPS) we analyze an HI self-absorption cloud centered on l = 318.0 deg, b = -0.5 deg, and velocity, v = -1.1 km/s. The cloud was observed with the Australia Telescope Compact Array (ATCA)…

Astrophysics · Physics 2009-11-10 D. W. Kavars , J. M. Dickey , N. M. McClure-Griffiths , B. M. Gaensler , A. J. Green

In our solar system, the densely cloud-covered atmosphere of Venus stands out as an example of how polarimetry can be used to gain information on cloud composition and particle mean radius. With current interest running high on discovering…

Earth and Planetary Astrophysics · Physics 2022-12-14 Robert A. West , Philip Dumont , Renyu Hu , Vijay Natraj , James Breckinridge , Pin Chen

Crowdsourced vehicle-based observations have the potential to improve forecast skill in convection-permitting numerical weather prediction (NWP). The aim of this paper is to explore the characteristics of vehicle-based observations of air…

Atmospheric and Oceanic Physics · Physics 2021-05-27 Zackary Bell , Sarah L Dance , Joanne A Waller

We investigate the global seasonal variations of near-surface relative humidity and relevant attributes, like temperature and water vapor volume mixing ratio on Mars using calculations from modelled and measurement data. We focus on 2 am…

Earth and Planetary Astrophysics · Physics 2019-07-24 B. Pál , Á. Kereszturi , F. Forget , M. D. Smith

Shape measurements of galaxies and galaxy clusters are widespread in the analysis of cosmological simulations. But the limitations of those measurements have been poorly investigated. In this paper, we explain why the quality of the shape…

Astrophysics of Galaxies · Physics 2023-02-22 Moritz S. Fischer , Lucas M. Valenzuela

Near surface seafloor properties are needed for recreational, commercial, and military applications. Construction projects on the ocean seafloors often require extensive knowledge about strength, deformability, hydraulic, thermal, acoustic,…

Atmospheric and Oceanic Physics · Physics 2009-11-04 Michael M. Harris , William E. Avera , Andrei Abelev , Frank W. Bentrem , L. Dale Bibee

Numerical weather prediction requires initial estimates of the atmospheric state. Since the atmospheric density field is intricately woven into the atmosphere's governing equations, advancing atmospheric density estimation will improve…

Atmospheric and Oceanic Physics · Physics 2025-09-08 William Luszczak , Man-Yau Chan

Helium has the lowest boiling point of any element in nature at normal atmospheric pressure. Therefore, any unwanted substance like impurities present in liquid helium will be frozen and will be in solid form. Even if these solid impurities…

Instrumentation and Detectors · Physics 2021-02-24 Dominik Sifrig , Sascha Martin , Dominik Zumbühl , Christian Schönenberger , Laurent Marot

We report the first uniform and systematic study of dust and molecular gas in nearby molecular clouds. We use surveys of dust extinction and emission to determine the opacity and map the distribution of the dust within a dozen local clouds…

Astrophysics of Galaxies · Physics 2022-05-25 John Arban Lewis , Charles J. Lada , Thomas Dame

Glycerol is a hygroscopic fluid that spontaneously absorbs water vapor from the atmosphere. For applications involving glycerol, care must be taken to avoid exposure to humidity, since its viscosity decreases quickly as water is absorbed.…

Fluid Dynamics · Physics 2023-08-09 Jesse T. Ault , Sangwoo Shin , Allan Garcia , Antonio Perazzo , Howard A. Stone

The relation between ice composition in the nucleus of comet 67P/Churyumov-Gerasimenko on the one hand and relative abundances of volatiles in the coma on the other hand is important for the interpretation of density measurements in the…

Earth and Planetary Astrophysics · Physics 2023-05-26 Matthias Laeuter , Tobias Kramer , Martin Rubin , Kathrin Altwegg

Measurements with a glider show that thermal theories published for decades need to be revised. We present a corrected view of temperature and humidity in thermal updrafts.

Atmospheric and Oceanic Physics · Physics 2022-11-02 Oliver Predelli , Ronald Niederhagen

Measuring the thermal conductivity ($\kappa$) of water at extreme conditions is a challenging task and few experimental data are available. We predict $\kappa$ for temperatures and pressures relevant to the conditions of the Earth mantle,…

Materials Science · Physics 2023-05-10 Cunzhi Zhang , Marcello Puligheddu , Linfeng Zhang , Roberto Car , Giulia Galli

Remote sensors are becoming the standard for observing and recording ecological data in the field. Such sensors can record data at fine temporal resolutions, and they can operate under extreme conditions prohibitive to human access.…

Artificial Intelligence · Computer Science 2012-06-26 Ethan W. Dereszynski , Thomas G. Dietterich