Results 51 to 60 of about 228,178 (278)

Raman Microscopy at the Organic–Inorganic Interfaces in Human Calcified Aortic Valves Shows the Co‐Existence of Whitlockite Crystals and Carbonated Hydroxyapatite‐Mineralized Collagen Fibrils

Advanced Functional Materials, EarlyView.
This study advances our understanding of aortic valve stenosis by capturing spatially resolved chemical and structural changes at the nanoscale. The findings highlight the potential of combined Raman and electron microscopy for understanding calcification mechanisms across diverse tissue types.
Robin H. M. Van der Meijden, Carolien T. A Kuster, Amber van Broekhoven, Raphaela Allgayer, Luco Rutten, Rona Roverts, Marta Cerruti, Elena Macías‐Sánchez, Jan Hein Cornel, Salloua el Messaoudi, Anat Akiva, Nico Sommerdijk   +11 more
wiley   +1 more source

Quantitative Constraint on the Contribution of Resolved Gamma-Ray Sources to the Sub-PeV Galactic Diffuse Gamma-Ray Flux Measured by the Tibet ASγ Experiment

The Astrophysical Journal Letters
Motivated by the difference between the fluxes of sub-PeV Galactic diffuse gamma-ray emission (GDE) measured by the Tibet AS γ experiment and the LHAASO collaboration, our study constrains the contribution to the GDE flux measured by Tibet AS γ from the ...
S. Kato, M. Anzorena, D. Chen, K. Fujita, R. Garcia, J. Huang, G. Imaizumi, T. Kawashima, K. Kawata, A. Mizuno, M. Ohnishi, T. Sako, T. K. Sako, F. Sugimoto, M. Takita, Y. Yokoe   +15 more
doaj   +1 more source

Diffuse Galactic Gamma Rays from Shock-Accelerated Cosmic Rays

, 2012
A shock-accelerated particle flux \propto p^-s, where p is the particle momentum, follows from simple theoretical considerations of cosmic-ray acceleration at nonrelativistic shocks followed by rigidity-dependent escape into the Galactic halo.
A. R. Bell, A. R. Bell, C. D. Dermer, Charles D. Dermer, F. W. Stecker, G. F. Krymskii, J. G. Kirk, R. Ramaty, S. Hayakawa, V. L. Ginzburg, V. S. Berezinskii   +10 more
core   +1 more source

Excess GeV radiation and cosmic ray origin [PDF]

, 2001
Recent EGRET observations of the diffuse Galactic gamma-ray emission reveal a spectrum which is incompatible with the assumption that the cosmic ray spectra measured locally hold throughout the Galaxy: the spectrum above 1 GeV, where the emission is ...
Aharonian, Aharonian, Allen, Asakimori, Atoyan, Baring, Blandford, Borkowski, Brecher, Buckley, Clark, Dermer, Engel, Erlykin, Erlykin, Erlykin, Erlykin, Esposito, Ferrari, Ferrari, Hartman, Hunter, I. Büsching, Kamei, Koyama, Koyama, LeBohec, M. Pohl, Mannheim, Milne, Moffett, Mori, Muraishi, Möhring, Möhring, Pohl, R. Schlickeiser, Ranft, Reynolds, Roesler, Slane, Sreekumar, Stecker, Thanh Vân, Thanh Vân, Webber   +45 more
core   +2 more sources

COSMIC RAY ANTIPROTONS [PDF]

Particles, Strings and Cosmology (PASCOS 99), 2000
Cosmic ray antiprotons have been detected for over 20 years and are now measured reliably. Standard particle and astrophysics predict a conventional spectrum and abundance of secondary antiprotons consistent with all current measurements. These measurements place limits on exotic Galactic antiproton sources and non-standard antiproton properties ...
openaire   +2 more sources

Hierarchical Structure and Fabrication of Functionally Graded Biointerfaces in the Mussel Byssus

Advanced Materials Interfaces, EarlyView.
The byssus is a fibrous protein‐based holdfast consisting of mechanically distinct interfaces, which mussels use to anchor their soft living tissue to hard seashore surfaces. Here, multiscale methodologies were used to elucidate the compositional and structural features underlying these functionally graded interfaces and how they are fabricated through
Lucia Youssef, Jenaes Sivasundarampillai, Sydney Mikulin, Franziska Jehle, Matthew J. Harrington   +4 more
wiley   +1 more source

An Assessment of the GLE Alert++ Warning System

Atmosphere
Over the last years the Athens Cosmic Ray Group of the National & Kapodistrian University of Athens has implemented a warning tool called GLE Alert, which is a highly credible application that issues alerts when a ground level enhancement (GLE) starts ...
Helen Mavromichalaki, Pavlos Paschalis, Maria Gerontidou, Anastasia Tezari, Maria-Christina Papailiou, Dimitra Lingri, Maria Livada, Argyris Stassinakis, Norma Crosby, Mark Dierckxsens   +9 more
doaj   +1 more source

Connecting blazars with ultra high energy cosmic rays and astrophysical neutrinos [PDF]

, 2017
We present a strong hint of a connection between high energy $\gamma$-ray emitting blazars, very high energy neutrinos, and ultra high energy cosmic rays.
Caccianiga, Lorenzo, Coenders, Stefan, Giommi, Paolo, Padovani, Paolo, Resconi, Elisa   +4 more
core   +2 more sources

Passivation‐Induced Species Dynamics and Microstructural Evolution in Solid‐State Lithium–Sulfur Cathodes

Advanced Science, EarlyView.
The formation of insulating Li2S during discharge in solid‐state lithium–sulfur batteries passivate reaction sites and limits sulfur utilization. In this work, a microstructure‐resolved modeling framework coupling transport and reaction kinetics is developed to predict charge–discharge behavior and reveal particle‐scale species evolution and incomplete
Arpan K. Sharma, Bairav S. Vishnugopi, Elif Pınar Alsaç, Matthew T. McDowell, Partha P. Mukherjee   +4 more
wiley   +1 more source

Constraints on the origin of the ultra-high energy cosmic-rays using cosmic diffuse neutrino flux limits: An analytical approach

, 2012
Astrophysical neutrinos are expected to be produced in the interactions of ultra-high energy cosmic-rays with surrounding photons. The fluxes of the astrophysical neutrinos are highly dependent on the characteristics of the cosmic-ray sources, such as ...
A. Ishihara, Aya Ishihara, G. T. Zatsepin, G. T. Zatsepin, S. Yoshida, Shigeru Yoshida, T. K. Gaisser   +6 more
core   +1 more source