Results 221 to 230 of about 477,612 (260)

Molecular Active Matter, Kinetic Asymmetry, and Non‐Reciprocal Interactions

open access: yesSmall, EarlyView.
Nanoscale enzymes constitute dissipative active matter that converts scalar energy input into vectorial outputs. Through kinetic and diffusion asymmetry, they break time and space symmetry, resulting in directional motion. This mechanism accounts for both positive and negative chemotaxis, as well as non‐reciprocal interactions between enzymes that ...
Niladri Sekhar Mandal   +3 more
wiley   +1 more source

Occultation constraints on solar system formation models. [PDF]

open access: yesPhilos Trans A Math Phys Eng Sci
Buie MW   +3 more
europepmc   +1 more source

An international survey of the relatives and friends of electroconvulsive therapy recipients. [PDF]

open access: yesPsychol Psychother
Harrop C   +5 more
europepmc   +1 more source

NOWCASTING ASTRONOMICAL SEEING: TOWARDS AN OPERATIONAL APPROACH

open access: yesPublications of the Astronomical Society of the Pacific, 1995
In Murtagh and Sarazin (1993), the ability to regress seeing on a set of near-ground meterological variables was assessed. The present article proceeds towards the following operational framework: we obtain median seeing estimates for the night, given knowledge of ambient ground meterological conditions.
Fionn Murtagh, Marc Sarazin
exaly   +4 more sources

THE POSSIBILITY OF COMPENSATING ASTRONOMICAL SEEING

Publications of the Astronomical Society of the Pacific, 1953
The severe limitations imposed upon nearly all astronomical observations by "seeing" the effects resulting from passage of light rays through the turbulent atmosphere of the earth are familiar to every observer. With a small instrument the effect may appear largely as a continual shifting and scintillation of the image of a star, but with a large ...
exaly   +2 more sources

Fundamental and Applied Aspects of Astronomical “Seeing”

Annual Review of Astronomy and Astrophysics, 1985
1. PREFACE Despite recent advances in the use of spacecraft as observatory platforms, much astronomy is still conducted from the surface of the Earth, as the existence of an IAU Commission on Site Identification and Protection testifies. The literature on astronomical seeing and observatory site selection is widely scattered throughout journals and ...
C E Coulman
exaly   +2 more sources

Attempt to assess astronomical “seeing” using a model

Astrophysics and Space Science, 1996
The degradation of astronomic images by optical inhomogeneities in the earth's atmosphere is generally called “seeing”. It represents the angular diameter of the stellar images as seen through a turbulent medium. Several techniques can be used to determine this parameter.
Zouhair Benkhaldoun, J Vernin
exaly   +2 more sources

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