Results 11 to 20 of about 32,395 (222)

Exposures in Indoor Air Affecting Health. [PDF]

Allergy
ABSTRACT Indoor air quality (IAQ) is influenced by a wide range of chemical, biological and physical agents that can negatively impact physical, immunological and mental health. Adverse health effects depend on the type and concentration of pollutants, duration of exposure, and individual susceptibility.
Hartiala M, Elenius V, Pesquera AA, Androulakis S, Annesi-Maesano I, Badyda A, Brandsma S, Chatziprodromidou I, Gajski G, Garcia-Aymerich J, Giorio C, Hugg T, Jaakkola JJK, Koch S, Leonards PEG, Matrali A, Melymuk L, Mueller N, Muszyński A, Opbroek J, Paciência I, Pandis SN, Pozdniakova S, Rantala AK, Sufuentes SR, Schenk L, Sugeng E, Sunyer-Caldú A, Vantarakis A, Zherebker A, Alfaro-Moreno E, Nizzetto PB, Dominguez JF, Karatzas S, Mureddu F, Salonen H, Papadopoulos N, Jartti T, IDEAL Consortium.   +38 more
europepmc   +2 more sources

SuperWASP Observations of the 2007 Outburst of Comet 17P/Holmes [PDF]

, 2010
We present wide-field imaging of the 2007 outburst of Comet 17P/Holmes obtained serendipitously by SuperWASP-North on 17 nights over a 42-night period beginning on the night (2007 October 22-23) immediately prior to the outburst.
Alan Fitzsimmons, Altenhoff, Bockelée-Morvan, Burns, Buzzi, Casali, Cochran, Combi, Damian Christian, Dello Russo, Don L. Pollacco, Drahus, Eddington, El-Houssieny, Fitzsimmons, Gaillard, Helbert, Henry H. Hsieh, Ho, Hsieh, Hsieh, Ishiguro, Ishiguro, Joshi, Kobayashi, Kossacki, Lederer, Lin, Meech, Montalto, Moreno, Pittichová, Pollacco, Reach, Schleicher, Schleicher, Sekanina, Sekanina, Sekanina, Sekanina, Snodgrass, Snodgrass, Sposetti, Stevenson, Thomas, Trigo-Rodriguez, Trigo-Rodriguez, Tuzzolino, Wagner, Whipple, Yang, Yogesh Joshi   +51 more
core   +2 more sources

Dust colors, dust release rates, and dust-to-gas ratios in the comae of six comets [PDF]

Astronomy and Astrophysics Supplement Series, 1996
In an attempt to find correlations between properties of comets, we determine the dust colors, dust release rates, and dust-to-gas mass ratios in the comae of Comets Bowell (1980 b = 1982 I), Bradfield (1979 l = 1979 X), Brorsen-Metcalf (1989 o = 1989 X), Giacobini-Zinner (1984 e = 1985 XIII), Levy (1990 c = 1990 XX), and Stephan-Oterma (1980 g = 1980 ...
G. C. Sanzovo, P. D. Singh, W. F. Huebner   +2 more
openaire   +1 more source

Parameters of dust jets in comet Encke’s coma

Monthly Notices of the Royal Astronomical Society, 2020
ABSTRACTUsing 4412 positional observations, we compute eight single apparition orbits in the period 1993–2017. The analysis of the residuals of the orbit’s fit shows their systematic deviations around perihelia. We assume that these deviations in positional observations are a result of the dust emissions from a restricted area of the nucleus, and that ...
Yu Medvedev, Yu Chernetenko
openaire   +1 more source

On the origin of inner coma structures observed by Rosetta during a diurnal rotation of comet 67P/Churyumov-Gerasimenko [PDF]

, 2016
The Rosetta probe around comet 67P/Churyumov-Gerasimenko (67P) reveals an anisotropic dust distribution of the inner coma with jet-like structures. The physical processes leading to jet formation are under debate, with most models for cometary activity ...
Kramer, Tobias, Noack, Matthias
core   +1 more source

Physics of intact capture of cometary coma dust samples [PDF]

AIP Conference Proceedings, 2012
The physics of hypervelocity impact into foams are of interest because of application to comet dust capture during flyby encounters. Particles much larger than the foam cells behave as if the foam were a continuum, so that standard equations of fluid mechanics describe the effects of drag and ablation.
Anderson, W. W., Ahrens, Thomas
openaire   +2 more sources

Monte Carlo Models of Comet Dust Tails Observed from the Ground

Universe, 2022
Dust particles leaving the comet nucleus surface are entrained by the gas within the first few nuclear radius distances and are subjected to a complex hydrodynamical environment.
Fernando Moreno
doaj   +1 more source

A Spitzer Study of Comets 2P/Encke, 67P/Churyumov-Gerasimenko, and C/2001 HT50 (LINEAR-NEAT) [PDF]

, 2006
We present infrared images and spectra of comets 2P/Encke, 67P/Churyumov-Gerasimenko, and C/2001 HT50 (LINEAR-NEAT) as part of a larger program to observe comets inside of 5 AU from the sun with the Spitzer Space Telescope.
Charles E. Woodward, David E. Harker, David J. Osip, Delbo M., Diane H. Wooden, Elisha Polomski, Green S. F., Hanner M. S., Hanner M. S., Humberto Campins, Jana Pittichova, Jenniskens P., Kelley M. S., Lagerros J. S. V., Lamy P. L., Lecacheux J., Martha S. Hanner, Michael S. Kelley, Pravdo S., Robert D. Gehrz, Sekanina Z., Susan M. Lederer   +21 more
core   +3 more sources

Dust in cometary comae: Present understanding of the structure and composition of dust particles [PDF]

Planetary and Space Science, 2008
In situ probing of a very few cometary comae has shown that dust particles present a low albedo and a low density, and that they consist of both rocky material and refractory organics. Remote observations of solar light scattered by cometary dust provide information on the properties of dust particles in the coma of a larger set of comets.
Levasseur-Regourd, Anny Chantal, Zolensky, M., Lasue, Jérémie   +2 more
openaire   +3 more sources

Physical properties of cometary dust from Monte Carlo analysis of tail and coma images

Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2011
Forward and inverse Monte Carlo modeling of cometary dust tail and coma images has provided one of the best approaches to infer the basic physical dust parameters and their time dependence: mass loss rates, ejection velocities, and size distribution ...
F. Moreno
doaj   +1 more source