Results 21 to 30 of about 1,063,912 (284)

Sky coverage modeling for the whole sky for laser guide star multiconjugate adaptive optics [PDF]

open access: yes, 2012
The scientific productivity of laser guide star adaptive optics systems strongly depends on the sky coverage, which describes the probability of finding natural guide stars for the tip/tilt wavefront sensor(s) to achieve a certain performance.
Andersen, David   +2 more
core   +1 more source

The cosmic microwave background Cold Spot anomaly: the impact of sky masking and the expected contribution from the Integrated Sachs-Wolfe effect [PDF]

open access: yes, 2017
We re-analyse the cosmic microwave background (CMB) Cold Spot (CS) anomaly with particular focus on understanding the bias a mask (contaminated by Galactic and point sources) may introduce.
Benoit-Lévy, Aurélien   +2 more
core   +3 more sources

Notas para una cartografía oral del cielo entre los tobas del oeste formoseño

open access: yesBulletin de l'Institut Français d'Études Andines, 2017
The purpose of this article is to study the Toba vision of the sky: celestial objects, asterisms, and those phenomena that, from a native perspective, are significantly related to the sky.
Cecilia Paula Gómez
doaj   +1 more source

Predicting the subclinical carotid atherosclerosis in overweight and obese patients using a machine learning model

open access: yesРоссийский кардиологический журнал, 2022
Aim. To develop a model for predicting the subclinical carotid atherosclerosis (SCA) in order to refine cardiovascular risk (CVR) using machine learning methods in overweight and obese patients without hypertension, diabetes and/or cardiovascular disease
D. V. Gavrilov   +4 more
doaj   +1 more source

Projective Cross-Ratio on Hypercomplex Numbers

open access: yes, 2012
The paper presents a new cross-ratio of hypercomplex numbers based on projective geometry. We discuss the essential properties of the projective cross-ratio, notably its invariance under Mobius transformations.
Brewer, Sky
core   +1 more source

Traditions of nature and ecology themes in ancient Mongolian literature

open access: yesNomadic Civilization: Historical Research
In this article, the author presents a classification of Mongolian folklore and modern poetic works on the themes of nature conservation and ecology, based on specific examples of epics, blessings, praise, and poems. The teachings of the Mongolian people,
. Wurigamala
doaj   +1 more source

Estimation of the sky radiance [PDF]

open access: yesScientific Technical Review, 2019
For the infrared prefilter model there was a need for testing the sky radiation and defining its fluctuations within the zone of neighborhood area for the current frame and tests of repeatability.
Knežević Dragan   +3 more
doaj  

Comparative Analysis of Binhu and Cosmic-2 Radio Occultation Data

open access: yesRemote Sensing, 2022
Global Navigation Satellite System (GNSS) radio occultation (RO) technology has been widely used in Earth atmospheric detection and has a significant impact on numerical weather prediction (NWP), climate detection, and other fields. Cosmic-2 LEO-1 (C2E1)
Hongjie Zhang   +7 more
doaj   +1 more source

Kaluza-Klein Masses and Couplings: Radiative Corrections to Tree-Level Relations

open access: yes, 2011
The most direct experimental signature of a compactified extra dimension is the appearance of towers of Kaluza-Klein particles obeying specific mass and coupling relations. However, such masses and couplings are subject to radiative corrections.
Bauman, Sky, Dienes, Keith R.
core   +1 more source

Mosaicking with cosmic microwave background interferometers [PDF]

open access: yes, 2006
Measurements of cosmic microwave background (CMB) anisotropies by interferometers offer several advantages over single-dish observations. The formalism for analyzing interferometer CMB data is well developed in the flat-sky approximation, valid for small
Cornwell T. J.   +8 more
core   +3 more sources

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