Results 141 to 150 of about 1,644,024 (262)

Feminist Agroecology and Criollo Hens: Women's Everyday Resistance in Colombia

Journal of Agrarian Change, EarlyView.
ABSTRACT Industrial poultry technologies and processes are reshaping the knowledge, practice and agrobiodiversity of criollo (Gallus domesticus) or backyard hen keeping, as well as outcompeting this livelihood in formal markets. This transition undermines women's autonomy and socio‐economic resilience by engendering dependence on market inputs ...
Jaskiran Kaur Chohan, Arlex Angarita Leiton   +1 more
wiley   +1 more source

Resolution of the cosmological constant problem by unimodular gravity and signature reversal symmetry

Physics Letters B
The (old) cosmological constant problem consists of two different problems. The first is the huge discrepancy between the value of the cosmological constant deduced from observations and its value expected from cosmological constant-like theoretical ...
Recai Erdem
doaj   +1 more source

Xenoliths in meteorites: Insights into the dynamics of material exchange between asteroids

Meteoritics &Planetary Science, EarlyView.
Abstract A minor fraction of meteorites contains xenoliths, that is, clasts that were formed on a different parent body than that of the host lithology. The occurrence of xenoliths is direct evidence for the exchange of material between asteroids, including exchanges between asteroids from the carbonaceous (CC) and non‐carbonaceous (NC) reservoirs ...
J. Gattacceca, B. Devouard, L. Bonal, Y. Marrocchi, A. Greshake, R. Tartèse, M. Gounelle, D. AuYang, C. Sonzogni, M. Hutson, A. Irving, C. Agee, T. Shisseh, A. Love, V. Vidal, D. Borschneck, S. A. Eckley, A. Morbidelli   +17 more
wiley   +1 more source

Assessing the analytical capabilities of handheld laser‐induced breakdown spectroscopy (hLIBS) on corroded iron objects of possible meteoritic origin

Meteoritics &Planetary Science, EarlyView.
Abstract Despite meteorites having been recognized as the source of iron in some ancient iron artifacts, few archeological irons have been analyzed so far, as invasive methods are precluded. In this work, four iron knives and one axe collected near Guelmime and Imilchil (Morocco) were investigated by advanced analytical techniques, including handheld ...
Giorgio S. Senesi, Albert Jambon, Olga De Pascale, Lahcen Ouknine, Hassan Nachit, Fouad Khiri, Abderrahmane Ibhi   +6 more
wiley   +1 more source

Chondrule size averaging in two and three dimensions

Meteoritics &Planetary Science, EarlyView.
Abstract Chondrule sizes are an important discriminant of chondrite groups and chondrule formation theories. Yet most studies report 2‐D sizes without attempting the somewhat tedious corrections to 3‐D proposed in the past literature. I show here that 3‐D size averages can be simply calculated directly from 2‐D averages of appropriate powers of sizes ...
Emmanuel Jacquet
wiley   +1 more source

Charged wormholes in (anti-)de Sitter spacetime

Physics Letters B
We present a family of charged, traversable wormhole solutions in the presence of a cosmological constant. In de Sitter spacetime, two types of wormhole throats can exist–referred to as typical and cosmological throat–located at small and large radial ...
Hyeong-Chan Kim, Wonwoo Lee
doaj   +1 more source

Thermal history of an amoeboid olivine aggregate in the early solar nebula

Meteoritics &Planetary Science, EarlyView.
Abstract Carbonaceous chondrites commonly contain amoeboid olivine aggregates (AOAs). Here, we investigated an AOA in the CR chondrite Y‐793261. This AOA contains an unstable assemblage of forsterite and quartz. We found a rare occurrence of enstatite and quantitatively discuss its formation process.
M. Kimura, N. Imae, M. Komatsu, A. Yamaguchi   +3 more
wiley   +1 more source

Non-relativistic spacetimes with cosmological constant

, 1999
Recent data on supernovae favour high values of the cosmological constant. Spacetimes with a cosmological constant have non-relativistic kinematics quite different from Galilean kinematics.
Aldrovandi, R., Crispino, LCB, Pereira, J. G., Barbosa, A. L.   +3 more
core   +1 more source

Distribution and rare earth element abundances of apatite in Bennu samples determined by synchrotron X‐ray fluorescence spectroscopy

Meteoritics &Planetary Science, EarlyView.
Abstract Apatite is often the most rare earth element (REE)‐enriched mineral in chondritic meteorites. REE enrichment and fractionation levels in apatite grains can give insight into the aqueous fluids in which they formed and the conditions prevailing within the host body. In this study, we applied synchrotron X‐ray fluorescence (SXRF) spectroscopy to
B. J. Tkalcec, P. Tack, T. Baert, J. Herthogs, B. Vekemans, B. Bazi, E. De Pauw, M. Di Michiel, G. Falkenberg, J. Garrevoet, G. Libourel, M. Portail, V. Guigoz, C. Collin, H. C. Connolly Jr., D. S. Lauretta, L. Vincze, F. E. Brenker   +17 more
wiley   +1 more source

The Cosmological Constant in Brane Cosmology

, 2005
1 pages,PRD style, This paper has been withdrawn by the second author since he is suspected by the first author (the corresponding author) of commiting ...
Chen, Jia-Zhong, Jia, Duoje
openaire   +2 more sources