Results 61 to 70 of about 269,792 (251)

Non-LTE treatment of molecules in the photospheres of cool stars [PDF]

, 2000
We present a technique to treat systems with very many levels, like molecules, in non-LTE. This method is based on a superlevel formalism coupled with rate operator splitting.
Andreas Schweitzer, Dreizler S., E. Baron, Peter H. Hauschildt, Rybicki G. B.   +4 more
core   +2 more sources

Assessment of Soil Erosion Over Six Decades in a Long‐Term Experiment Using Fallout 137Cs and RUSLE: A South American Case Study

Land Degradation &Development, EarlyView.
ABSTRACT Soil erosion remains a major global concern affecting agricultural productivity and land sustainability. This study investigates the magnitude and variability of soil erosion in a long‐term experiment (LTE) established in 1963 in Colonia, Uruguay, aiming to compare the performance of the 137Cs tracer technique and the RUSLE model across ...
Marcos Tassano, Mirel Cabrera, Joan Gonzalez, Mario Perez‐Bidegain, Olivier Evrard, Kathrin Grahmann, J. Andrés Quincke   +6 more
wiley   +1 more source

Basics of the NLTE physics

, 2014
Basic assumptions of the NLTE approximation in stellar atmospheres are summarized. The assumptions of thermodynamic equilibrium, local thermodynamic equilibrium (LTE), and non-LTE (NLTE) are compared.
Kubát, Jiří
core   +1 more source

Evaluating the sustainability of mineral water consumption using multi‐scale hydrogeophysics in Caxambu, Brazil

Near Surface Geophysics, EarlyView.
Abstract A better understanding of the near‐surface aquifer system of the Caxambu Water Park, located in the Minas Gerais State, Brazil, has been achieved. The study aimed to identify groundwater reservoirs and flow patterns and contribute to the hydrogeological conceptual model using a multi‐scale geophysical approach.
Emanuele F. La Terra, Miguel Tupinambá, Liliane P. Panetto, José Antonio N. Pereira, Tainã P. Oliveira, Antonio Carlos Pedrosa‐Soares   +5 more
wiley   +1 more source

Origin of Phobos and Deimos: Orbital Evolution Shortly after Formation from a Potential Dislocation

The Planetary Science Journal
This paper deals with the formation and evolution of Mars’ moons, Phobos and Deimos, assuming the dislocation of a larger progenitor as the origin of these moons. The study by R. Hyodo et al.
Ryan Dahoumane, Kévin Baillié, Valéry Lainey   +2 more
doaj   +1 more source

Non-LTE line formation for heavy elements in four very metal-poor stars

, 2007
Stellar parameters and abundances of Na, Mg, Al, K, Ca, Sr, Ba, and Eu are determined for four very metal-poor stars (-2.66 < [Fe/H] < -2.15) based on non-LTE line formation and analysis of high-resolution (R ~60000 and 90000) high signal-to-noise (S/N >
Aldenius, Ali, Alonso, Alonso, Anders, Andrievsky, Anstee, Aoki, Aoki, Asplund, Asplund, Asplund, Auer, Bagnulo, Barbuy, Barklem, Barklem, Barklem, Barklem, Barklem, Baumüller, Baumüller, Baumüller, Belyakova, Carretta, Cayrel, Christlieb, Christlieb, Cohen, Cowan, Cowan, Drawin, Frebel, Fuhrmann, Fuhrmann, Fuhrmann, Fuhrmeister, Fulbright, Fulbright, G. Zhao, Gehren, Gehren, Goswami, Gratton, Grupp, H. W. Zhang, Hill, Honda, Idiart, Ivans, J. R. Shi, Johnson, Johnson, K. Noguchi, Korn, Kratz, Kupka, L. Mashonkina, Lambert, Landstreet, Lawler, M. Bergemann, M. Takada-Hidai, Mashonkina, Mashonkina, Mashonkina, Mashonkina, Mashonkina, Mashonkina, Mashonkina, McWilliam, McWilliam, Meléndez, Meléndez, Mishenina, Moity, Noguchi, Nörtershäuser, Perryman, Przybilla, Przybilla, Raassen, Rybicki, Rybicki, Sakhibullin, Seaton, Shi, Shimanskaya, Shimansky, Short, Simmerer, Smith, Smith, Smith, Sneden, Sneden, Spergel, Spite, Spite, Steenbock, T. Gehren, Takeda, Theodosiou, Thevenin, Travaglio, Truran, VandenBerg, Vidal, Vidal, W. Aoki, Weaver, Zhang, Zhang, Zhao, Zhao   +114 more
core   +1 more source

Matching habitat choice could be brightness‐based instead of hue‐based in green‐brown polymorphic grasshoppers

Oikos, EarlyView.
Some prey species have evolved background matching, that is they resemble their surrounding environment in terms of colour and/or brightness. When prey populations inhabit patchy environments, they may even have evolved specialised phenotypes: each phenotype matching a specific subset of patches.
Lilian Cabon, Holger Schielzeth
wiley   +1 more source

LTE Spectrum Sharing Research Testbed: Integrated Hardware, Software, Network and Data

, 2017
This paper presents Virginia Tech's wireless testbed supporting research on long-term evolution (LTE) signaling and radio frequency (RF) spectrum coexistence. LTE is continuously refined and new features released.
Marojevic, Vuk, Nealy, Randall, Reed, Jeffrey H.   +2 more
core   +2 more sources

String‐Stable Platooning Control of Connected Automated Vehicles Under Non‐Uniform Stochastic Communication Delays

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT This paper is concerned with the platooning control problem of connected automated vehicles (CAVs) under non‐uniform stochastic vehicle‐to‐vehicle (V2V) communication delays. Most existing relevant studies assume uniform or deterministic or slowly varying delays, or design platoon controllers based on worst‐case delay bounds, resulting in ...
Dengfeng Pan, Xiaohua Ge, Derui Ding, Xian‐Ming Zhang   +3 more
wiley   +1 more source

Hydrometeor classification from polarimetric radar measurements: a clustering approach [PDF]

Atmospheric Measurement Techniques, 2015
A data-driven approach to the classification of hydrometeors from measurements collected with polarimetric weather radars is proposed. In a first step, the optimal number of hydrometeor classes (nopt) that can be reliably identified from a large ...
J. Grazioli, D. Tuia, A. Berne
doaj   +1 more source