Results 1 to 10 of about 937 (131)

Clustering Supported Classification of ChemCam Data From Gale Crater, Mars

Earth and Space Science, 2021
The Chemistry and Camera (ChemCam) instrument on board the Mars Science Laboratory (MSL) rover Curiosity has collected a very large and unique data set of in‐situ spectra and images of Mars since landing in August 2012.
Kristin Rammelkamp, Olivier Gasnault, Olivier Forni, Candice C. Bedford, Erwin Dehouck, Agnès Cousin, Jeremie Lasue, Gaël David, Travis S. J. Gabriel, Sylvestre Maurice, Roger C. Wiens   +10 more
doaj   +1 more source

The new Algerian Digital Seismic Network (ADSN): towards an earthquake early-warning system [PDF]

Advances in Geosciences, 2013
Seismic monitoring in Algeria has seen great changes since the Boumerdes earthquake of 21 May 2003. Indeed, the installation of a new digital seismic network has resulted in a significant upgrade of the previous analog telemetry network. During the last
A. Yelles-Chaouche, T. Allili, A. Alili, W. Messemen, H. Beldjoudi, F. Semmane, A. Kherroubi, H. Djellit, Y. Larbes, S. Haned, A. Deramchi, A. Amrani, A. Chouiref, F. Chaoui, K. Khellaf, C. Nait Sidi Said   +15 more
doaj   +1 more source

Pseudo-Relativistic Hartree–Fock and Fully Relativistic Dirac–Hartree–Fock Calculations of Radiative Parameters in the Fifth Spectrum of Lutetium (Lu V)

Atoms, 2022
Using two independent theoretical methods based on the pseudo-relativistic Hartree–Fock (HFR) and the fully relativistic Multiconfigurational Dirac–Hartree–Fock (MCDHF) approaches, we computed the radiative parameters (transition probabilities and ...
Lucas Maison, Helena Carvajal Gallego, Pascal Quinet   +2 more
doaj   +1 more source

Stark broadening parameter tables for neutral calcium spectral lines, II [PDF]

Serbian Astronomical Journal, 2000
Electron-, proton-, and ionized helium-impact broadening parameter tables for neutral calcium spectral lines, have been presented as a function of the temperature and the perturber density.
Dimitrijević M.S., Sahal-Brechot S.
doaj   +1 more source

Liquefaction Potential and V_s30 Structure in the Middle-Chelif Basin, Northwestern Algeria, by Ambient Vibration Data Inversion

Applied Sciences, 2022
The Middle-Chelif basin, in northwestern Algeria, is located in a seismically active region. In its western part lies the El-Asnam fault, a thrust fault responsible for several strong earthquakes.
Abdelouahab Issaadi, Ahmed Saadi, Fethi Semmane, Abdelkrim Yelles-Chaouche, Juan José Galiana-Merino   +4 more
doaj   +1 more source

Evidence for Amorphous Sulfates as the Main Carrier of Soil Hydration in Gale Crater, Mars

Geophysical Research Letters, 2022
Understanding the genesis of Martian soils is important to constrain the hydrogeologic history of the planet. Soils have the potential to record paleoenvironmental conditions, through the nature of secondary minerals formed during weathering.
G. David, E. Dehouck, P.‐Y. Meslin, W. Rapin, A. Cousin, O. Forni, O. Gasnault, J. Lasue, N. Mangold, P. Beck, S. Maurice, R. C. Wiens, G. Berger, S. Fabre, P. Pinet, B. C. Clark, J. R. Smith, N. L. Lanza   +17 more
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Jules Janssen : un refusé à l'ombre du soleil

Cahiers François Viète, 2015
Born into a middle-class family where art plays a major role, Jules Janssen was a self-taught scientist and had to work in the bank and then as a tutor while collecting university degrees.
Stéphane Le Gars
doaj   +1 more source

Stark broadening parameter tables for In II [PDF]

Serbian Astronomical Journal, 2000
Electron-, proton-, and ionized helium-impact broadening parameter tables for In II spectral lines, are presented as a function of the temperature and the perturber density. Calculations have been performed within the semiclassical perturbation approach.
Dimitrijević M.S., Sahal-Brechot S.
doaj   +1 more source

Costa Lobo (1864-1945), the Coimbra Spectroheliograph and the Internationalisation of Portuguese Astronomy

Cahiers François Viète, 2017
At the beginning of the 20th century, Portuguese astronomy was still firmly anchored in the past. Only astronometric research was pursued and Portuguese professional as­tronomers seldom published their results.
Vitor Bonifácio
doaj   +1 more source

Image et mesure : deux cultures aux origines de l’astrophysique française

Cahiers François Viète, 2006
In the commission preparing the 1874 transit of Venus, debates about the choice of photographic techniques are illustrative of the stakes that would come to characterize the beginning of astronomy in France over the following decades.
Stéphane Le Gars
doaj   +1 more source