Results 71 to 80 of about 6,884 (245)

The Cosmic Microwave Background Optical Depth Constrains the Duration of Reionization

The Astrophysical Journal Letters
Recently, it was pointed out that invoking a large value of the cosmic microwave background (CMB) optical depth, τ _CMB  = 0.09, could help resolve tensions between Dark Energy Survey Instrument DR2 baryon acoustic oscillation data and the CMB.
Christopher Cain, Alexander Van Engelen, Kevin S. Croker, Darby Kramer, Anson D’Aloisio, Garett Lopez   +5 more
doaj   +1 more source

Vision at high latitudes: High sensitivity without specific boreal adaptations in photoreception in reindeer (Rangifer tarandus L.)

Functional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract The light climate at high latitudes, in particular the extended twilight of winter and the reduced diel variation in light level in midsummer and midwinter, potentially constrains visual function and the synchronisation of temporal organisation in polar species. In this
Nicholas J. C. Tyler, Robert A. E. Fosbury, David Hazlerigg, Christopher Hogg   +3 more
wiley   +1 more source

Compression‐Expansion: Miniaturization, Modularity, and Logistics Beyond Earth

American Anthropologist, EarlyView.
ABSTRACT If the Cold War space race culminated in a return to Earth, at present we are experiencing a renewed interest in space. Drawing on fieldwork among people working in the space sector in Sweden, this article focuses on some of the imaginaries underpinning this resurgence and the contemporary commercialization of space. Specifically, I hone in on
Chakad Ojani
wiley   +1 more source

Weichselian–Holocene glacial history of the Sjuøyane archipelago, northern Svalbard

Boreas, EarlyView.
To reconstruct the glacial history of Sjuøyane, we describe coastal sedimentary sections in Quaternary sediments and constrain their chronology by radiocarbon and optically stimulated luminescence ages. The sedimentary sections largely consist of shallow (glacio‐)marine and/or littoral sediments deposited during high relative sea levels.
Anders Schomacker, Helena Alexanderson, Wesley R. Farnsworth, Mark F. A. Furze, Sofia E. Kjellman, Nina Kirchner, Elias Strandell Erstorp, Riko Noormets, Vincent Jomelli, Ólafur Ingólfsson   +9 more
wiley   +1 more source

A somatic multiple myeloma mutation unravels a mechanism of oligomerization‐mediated product inhibition in GGPPS

The FEBS Journal, EarlyView.
Geranylgeranyl diphosphate synthase (GGPPS) plays a key role in multiple myeloma biology. Using crystallography, mass spectrometry, and fluorescence spectroscopy, this study shows that a somatic multiple myeloma cell line mutation destabilizes inter‐dimer interactions, resulting in increased GGPPS activity by facilitating product releas.
Ruba Yehia, Jasmína Mária Portašiková, Rut Mor Yosef, Benny Da'adoosh, Alan Kádek, Petr Man, Moshe Giladi, Yoni Haitin   +7 more
wiley   +1 more source

Transforming DIY Geiger Counter Kits into Muon Detectors for Education and Scientific Exploration

Particles
Any Geiger counter can be used as an effective cosmic ray detector on its own. In fact, it is known that even in the absence of a radioactive source, the instrument detects what is known as background radiation, which consists of various types of ...
Marco Arcani, Domenico Liguori, Andrea Frassà, Altea Renata Maria Nemolato, Omar Del Monte, Cesare Guaita   +5 more
doaj   +1 more source

Nuclear Physics Meets the Sources of the Ultra-High Energy Cosmic Rays

Scientific Reports, 2017
The determination of the injection composition of cosmic ray nuclei within astrophysical sources requires sufficiently accurate descriptions of the source physics and the propagation – apart from controlling astrophysical uncertainties.
Denise Boncioli, Anatoli Fedynitch, Walter Winter   +2 more
doaj   +1 more source

Microtextures and structures in metal–sulfide grains in NWA 869 meteorite and their relation to thermal history of L‐chondrite parent body

Meteoritics &Planetary Science, Volume 60, Issue 3, Page 616-631, March 2025.
Abstract Results of microanalysis study of NWA 869 meteorite, an ordinary chondrite, where silicates, Fe‐Ni alloys, and troilite are major constituents, are reported. The presented study of microtextures in metallic and sulfide grains provides information on processes occurring from the asteroid's accretion, through the impacts until cooling.
Paulina Skirak, Gabriela Opiła, Adam Piestrzyński, Gabriela Kozub‐Budzyń, Czesław Kapusta   +4 more
wiley   +1 more source

Prayer, Participation, and Perfection in Dante's Commedia

Modern Theology, EarlyView.
Abstract This article stands at the intersection of two theological moments: one recognizing the theological authority of Dante Alighieri, especially in his Commedia, the other examining the relation of the doctrine of prayer to the doctrine of God. It argues that Dante can inform modern theological reflection on this relation in a profound way.
Stephen C. Pepper
wiley   +1 more source

On observations of the cosmic radiation background

The Astrophysical Journal, 1980
Extant models to explain the observed anisotropies in the microwave and x-radiation background have been of the clump type: the earth is falling toward a density enhancement of large scale in an otherwise homogeneous cosmology. We present here alternate models in which the anisotropies are true relics of the very early history of the universe, and in ...
openaire   +2 more sources