Results 71 to 80 of about 59,420 (206)

Middle to Late Pleistocene landscape evolution and glacial dynamics in the Eastern Alps: the Gröbminger Mitterberg record, Austria

Boreas, EarlyView.
Glacial erosion during the Last Glacial Maximum (LGM) has removed much evidence of earlier glaciations and interglacials in the European Alps. At Gröbminger Mitterberg (GM), beneath a blanket of LGM till, a distinctive sediment archive preserves deposits predating the LGM.
Gerit E. U. Griesmeier, Daniel P. Le Heron, Christopher Lüthgens, Gustav Firla, Bernhard Salcher, Fabian Dremel, Jan‐Christoph Otto, Jürgen M. Reitner   +7 more
wiley   +1 more source

Interacting quintessence in light of generalized uncertainty principle: cosmological perturbations and dynamics

European Physical Journal C: Particles and Fields, 2021
We consider a cosmological scenario endowed with an interaction between the universe’s dark components – dark matter and dark energy. Specifically, we assume the dark matter component to be a pressure-less fluid, while the dark energy component is a ...
Andronikos Paliathanasis, Genly Leon, Wompherdeiki Khyllep, Jibitesh Dutta, Supriya Pan   +4 more
doaj   +1 more source

Cosmic ray exposure and gas retention ages of the shocked angrite Northwest Africa 7203: Implications for a collisional history of angrites' parent body

Meteoritics &Planetary Science, EarlyView.
Abstract Angrites and eucrites are among the oldest basaltic rocks in the solar system. However, the shock histories of these meteorite groups differ markedly, as most angrites show little to no evidence of shock metamorphism. While some angrites exhibit weak wavy extinction in olivine, indicative of low‐level shock, only two—Northwest Africa (NWA ...
Atsushi Takenouchi, Hirochika Sumino, Hideyuki Hayashi, Takashi Mikouchi, Martin Bizzarro   +4 more
wiley   +1 more source

Exactly solvable model for cosmological perturbations in dilatonic brane worlds

, 2003
We construct a model where cosmological perturbations are analytically solved based on dilatonic brane worlds. A bulk scalar field has an exponential potential in the bulk and an exponential coupling to the brane tension.
A. Lukas, C. van de Bruck, D. Langlois, D. Langlois, D. Langlois, D. Langlois, G. Uchida, H. Kodama, H. Ochiai, H.A. Bridgman, J. Yokoyama, K. Koyama, K. Koyama, K. Koyama, K. Koyama, K.-i. Maeda, Kazuya Koyama, Keitaro Takahashi, L. Randall, L. Randall, M. Cvetič, M. Minamitsuji, N. Sago, O. Seto, P. Hořava, P. Hořava, R. Maartens, S. Kobayashi, S. Kobayashi, S. Mukohyama, S. Nojiri, S. Nojiri, T. Tanaka, V. Bozza, Y. Himemoto, Y. Himemoto, Y. Himemoto   +36 more
core   +1 more source

Seismic reflection and topography insights into Ries crater diameter and megablock zone

Meteoritics &Planetary Science, EarlyView.
Abstract Most of the extensive crater‐wide geophysical studies at the Ries impact structure were made decades ago when the origin of the structure was still being debated. Although it is one of the most studied impact structures, its internal structure was not imaged in high resolution until recently.
Kaidi Karro, Argo Jõeleht, Naoma McCall, Sean P. S. Gulick, Jakob Wilk, Gisela Pösges   +5 more
wiley   +1 more source

The Qingzhen reaction, a fine‐grained mineral assemblage associated with djerfisherite in some EH3 chondrites: Alteration on the EH parent body

Meteoritics &Planetary Science, EarlyView.
Abstract Enstatite chondrites formed under extremely reducing conditions in the protoplanetary disk. They are derived from two or more parent bodies, EH and EL, and both EH and EL groups contain petrologic type 3–6 samples. The rare lithophile‐ and halogen‐bearing sulfide, djerfisherite, occurs in low abundance in enstatite chondrites, most frequently ...
Peter Mc Ardle, Rhian H. Jones, Luke Daly, Romain Tartèse, Patricia L. Clay, Brian O'Driscoll, Ray Burgess, William Smith, Colin How, Lewis Hughes   +9 more
wiley   +1 more source

Description and modeling of the Jiddat al Harasis 091 L5 strewn field

Meteoritics &Planetary Science, EarlyView.
Abstract With a size of 51.2 × 7.2 km, the 10.9 ± 1.7 ka old Jiddat al Harasis 091 L5 chondrite strewn field is the largest known in Oman. It consists of more than 700 meteorites with a total mass of >4.5 tons from which the largest six stones of >100 kg to 1.5 tons make up two thirds of the total mass.
Karl Wimmer, Edwin Gnos, Beda Hofmann, Sandro Boschetti, Jan Walbrecker, Hansruedi Maurer   +5 more
wiley   +1 more source

A cosmological Higgs collider

Journal of High Energy Physics, 2020
The quantum fluctuations of the Higgs field during inflation could be a source of primordial density perturbations through Higgs-dependent inflaton decay.
Shiyun Lu, Yi Wang, Zhong-Zhi Xianyu
doaj   +1 more source

THE FATHERS, COMPUTERS AND US

Modern Theology, EarlyView.
Abstract This essay, designed as a complement to opinions expressed by Rowan Williams and some speakers at the conference in his honour, explores features of early Christianity which suggest a positive evaluation of artificial intelligence. Noting that the fear of reducing humans to machines has been joined in the modern age by the fear that machines ...
Mark J. Edwards
wiley   +1 more source

Alfven modes driven non-linearly by metric perturbations in anisotropic magnetized cosmologies

, 2007
We consider anisotropic magnetized cosmologies filled with conductive plasma fluid and study the implications of metric perturbations that propagate parallel to the ambient magnetic field.
APOSTOLOS KUIROUKIDIS, DEMETRIOS B. PAPADOPOULOS, Kokkotas K. D., KOSTAS KLEIDIS, Moortgat J., Ruzmaikina T. V., Zel'dovich Ya B.   +6 more
core   +1 more source