Results 31 to 40 of about 207,397 (293)

Anomalous post-Newtonian terms and the secular increase of the astronomical unit [PDF]

Advances in Space Research, 2013
In the last decade a major debate has emerged on the astrophysics community concerning the anomalous behaviour of the astronomical unit, the fundamental scale of distances in the Solar system. Several independent studies have combined radar ranging and optical data from the last four decades to come to the conclusion that the astronomical unit is ...
openaire   +3 more sources

Mortality during Transport of Pigs Subjected to Long Journeys: A Study in a Large European Abattoir

Veterinary Sciences, 2022
To date, especially in Europe, few studies have analysed the implications of long journeys on pig welfare and economic losses, expressed in terms of transport mortality.
Eleonora Marti, Eleonora Nannoni, Giulio Visentin, Luca Sardi, Giovanna Martelli, Simona Belperio, Gaetano Liuzzo   +6 more
doaj   +1 more source

Long-term Monitoring of Solar Activity by Amateur Astronomers [PDF]

International Astronomical Union Colloquium, 1988
Professional solar astronomy concentrates on the study of the atmosphere and interior of the Sun. Little attention is given to “classical” programmes, mainly statistical investigations of solar activity. Although the main properties of phenomena associated with the solar cycle seem to be understood there are still enough details to be explained, making
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Astronomijos ir meteorologijos jungtys Arato Reiškiniuose. The Connections Between Astronomy and Meteorology in Aratus’ Phaenomena [PDF]

Literatūra (Vilnius), 2010
The author of the article focuses on the connections between astronomy and meteorology in the Phaenome­na of Aratus of Soli (fl. 276 BC). Firstly, the attention is drawn to such connections that are apparent in the structure of the poem which has two ...
Naglis Kardelis
doaj  

LONG-TERM CALIBRATION STABILITY OF A RADIO ASTRONOMICAL PHASED ARRAY FEED

The Astronomical Journal, 2012
There are many challenges associated with the implementation of a phased array feed for radio astronomy applications. Among these is the need to have an adequate set of calibration measurements so that reliable beamformers can be computed. Changes in the operating environment and temporal gain drift in the electronics contribute to calibration drift ...
Michael Elmer, Brian D. Jeffs, Karl F. Warnick   +2 more
openaire   +1 more source

On the long-range gravity in warped backgrounds

, 2005
In this paper the Randall-Sundrum model with brane-localized curvature terms is considered. Within some range of parameters a compact extra dimension in this model can be astronomically large. In this case the model predicts small deviation from Newton's
Antoniadis, Arkani-Hamed, Boos, Davoudiasl, Dubovsky, Dvali, Dvali, Korn, Luty, Mikhail N. Smolyakov, Padilla, Porrati, Randall, Rubakov, Smolyakov, Volobuev   +15 more
core   +3 more sources

SPGCam: A specifically tailored camera for solar observations

Frontiers in Astronomy and Space Sciences, 2023
Designing a new astronomical instrument typically challenges the available cameras on the market. In many cases, no camera can fulfill the requirements of the instrument in terms of photon budget, speed, and even interfaces with the rest of the ...
David Orozco Suárez, David Orozco Suárez, Daniel Álvarez García, Daniel Álvarez García, Antonio C. López Jiménez, Antonio C. López Jiménez, María Balaguer Jiménez, María Balaguer Jiménez, David Hernández Expósito, David Hernández Expósito, Pierre Labrousse, Pierre Labrousse, Francisco J. Bailén, Francisco J. Bailén, Isabel Bustamante Díaz, Isabel Bustamante Díaz, Eduardo Bailón Martínez, Eduardo Bailón Martínez, Beatriz Aparicio del Moral, Beatriz Aparicio del Moral, José M. Morales Fernández, José M. Morales Fernández, Antonio Sánchez Gómez, Antonio Sánchez Gómez, Ángel Tobaruela Abarca, Ángel Tobaruela Abarca, Antonio J. Moreno Mantas, Antonio J. Moreno Mantas, José L. Ramos Más, José L. Ramos Más, Isabel Pérez Grande, Isabel Pérez Grande, Javier Piqueras Carreño, Javier Piqueras Carreño, Yukio Katsukawa, Masahito Kubo, Yusuke Kawabata, Takayoshi Oba, Manuel Rodríguez Valido, Eduardo Magdaleno Castelló, Jose Carlos Del Toro Iniesta, Jose Carlos Del Toro Iniesta   +41 more
doaj   +1 more source

On the massive young stellar object AFGL4176: High-spatial-resolution multi-wavelength observations and modeling [PDF]

, 2012
Deeply embedded and at distances of several kiloparsecs, massive young stellar objects (MYSOs) present numerous challenges for observation and study. In this work, we present spatially-resolved observations of one MYSO, AFGL 4176, together with survey ...
Boley, Paul, Bouwman, Jeroen, Henning, Thomas, Linz, Hendrik, Sobolev, Andrey, van Boekel, Roy   +5 more
core   +1 more source

Pyramidal Structures on Yttria‐Stabilized Zirconia after High Temperature Exposure at 1500°C: New Features on an Old Material

Advanced Engineering Materials, EarlyView.
New features on yttria‐stabilized zirconia after exposure at 1500°C: Newly discovered pyramidal structures on an old material. After exposure at 1550°C on the cross section of YSZ new features, namely pyramidal structures are discovered. These structures grow with time, increase in numbers, appear as singularities, are often arranged in strings, and ...
Doris Sebold, Dylan Jennings, Robert Vaßen   +2 more
wiley   +1 more source

Recovering Long-term Aerosol Optical Depth Series (1976–2012) from an Astronomical Potassium-based Resonance Scattering Spectrometer [PDF]

Atmospheric Measurement Techniques, 2014
Abstract. A 37 year long-term series of monochromatic Aerosol Optical Depth (AOD) has been recovered from solar irradiance measurements performed with the solar spectrometer Mark-I, deployed at Izaña mountain since 1976. The instrument operation is based on the method of resonant scattering, which presents a long-term stability and high precision in ...
A. Barreto, E. Cuevas, P. Pallé, P. M. Romero, F. Almansa, C. Wehrli   +5 more
openaire   +5 more sources