Results 81 to 90 of about 3,364,184 (247)

Collapse of Low Mass Clouds in the Presence of UV Radiation Field [PDF]

, 2000
The collapse of marginally Jeans unstable primordial gas clouds in the presence of UV radiation field is discussed. Assuming that the dynamical collapse proceeds approximately in an isothermal self-similar fashion, we investigate the thermal evolution of
Abel, Bajtlik, Binney, Corbelli, Draine, Galli, Giallongo, Haiman, Haiman, Hajime Susa, Hanawa, Kang, Kepner, Kitayama, Larson, Nishi, Nishi, Omukai, Omukai, Pascarelle, Shapiro, Stancil, Susa, Susa, Tajiri, Tegmark, Tetsu Kitayama, Thoul, Umemura   +28 more
core   +3 more sources

Ultraviolet radiation changes [PDF]

A major consequence of ozone depletion is an increase in solar ultraviolet (UV) radiation received at the Earth's surface. This chapter discusses advances that were made since the previous assessment (World Meteorological Organization (WMO)) to our ...
Blumthaler, M., Filyushkin, V., Frederick, John E., Ilyas, Mohammad, Madronich, Sasha, Mckenzie, Richard L., Muthusubramanian, P., Roy, Colin E., Stamnes, K., Wahner, Andreas   +9 more
core   +1 more source

Chemistry of a protoplanetary disk with grain settling and Lyman alpha radiation

, 2010
We present results from a model of the chemical evolution of protoplanetary disks. In our models we directly calculate the changing propagation and penetration of a high energy radiation field with Lyman alpha radiation included.
Bergin, Edwin A., Bethell, Thomas J., Calvet, Nuria, Fogel, Jeffrey K. J., Semenov, Dmitry   +4 more
core   +1 more source

A 10 km daily-level ultraviolet-radiation-predicting dataset based on machine learning models in China from 2005 to 2020 [PDF]

Earth System Science Data
Ultraviolet (UV) radiation is closely related to health; however, limited measurements have hindered further investigation of its health effects in China.
Y. Jiang, S. Shi, X. Li, C. Xu, H. Kan, H. Kan, B. Hu, X. Meng, X. Meng   +8 more
doaj   +1 more source

Growth of a mat-forming photograph in the presence of UV radiation [PDF]

Knowledge of the survival and growth of microorganisms in the presence of ultraviolet radiation is important for understanding the potential for life to exist in environments exposed to high fluxes of UV radiation.
Pierson, Beverly K., Ruff, A. L.
core   +1 more source

Antioxidant responses of damiana (Turnera diffusa Willd) to exposure to artificial ultraviolet (UV) radiation in an in vitro model: part I; UV-C radiation

Nutrición Hospitalaria, 2014
Introduction: Ultraviolet type C (UV-C) radiation has higher energy than the UV-B radiation and has been less studied because it is completely absorbed by the ozone layer.
Lluvia de Abril Alexandra Soriano-Melgar, Lilia Alcaraz-Meléndez, Lía C. Méndez-Rodríguez, María Esther Puente, Fernando Rivera-Cabrera, Tania Zenteno-Savín   +5 more
doaj   +1 more source

Ultraviolet radiation effects [PDF]

Solar ultraviolet testing was not developed which will provide highly accelerated (20 to 50X) exposures that correlate to flight test data. Additional studies are required to develop an exposure methodology which will assure that accelerated testing can ...
Slemp, Wayne S.
core   +1 more source

Temperature measurement by UV thermal radiation.

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY, 1994
Summary Accurate measurement of temperature is of considerable importance in materials processing, such as welding, thermal cutting, and heat treatment of metals. Radiation thermometry has a distinct advantage over other temperature detection methods, since it requires no physical contact with the work.
T Ohji, N Yoshioka, T Shiwaku, A Okubo
openaire   +3 more sources

Optimization of UV-A/PAR ratio for phenolic accumulation in kale using 3D radiation interception modeling

BMC Plant Biology
Background In vertical farms using light-emitting diode radiation, supplemental ultraviolet (UV)-A radiation at specific wavelengths and energy levels has been shown to enhance photosynthesis and biomass accumulation, indicating its potential as an ...
Min-Ji Kim, Moon-Sun Yeom, Myung-Min Oh
doaj   +1 more source

Hot white dwarfs and the UV delay in dwarf novae

, 1998
We calculate the effect of illumination of dwarf nova accretion discs by radiation from a hot, central, white dwarf. We show that only for very hot white dwarfs (Teff ~ 40 000$ K) the inner region of quiescent dwarf nova discs are partially depleted so ...
Dubus, G., Hameury, J. -M., Lasota, J. -P.   +2 more
core   +2 more sources