Results 31 to 40 of about 1,412 (268)

Multi-station fireball observations combining all-sky spectroscopy and optical trajectory measurements

open access: yesEarth and Planetary Physics
Optical monitoring of fireballs can provide reconstructions of luminous trajectories and the derivation of heliocentric orbits, whereas spectral observations are able to supply information from an entirely different perspective, with composition and ...
ZhiJian Xu   +3 more
doaj   +1 more source

Historical Bolide Infrasound Dataset (1960–1972)

open access: yesData
We present the first fully curated, publicly accessible archive of infrasonic records from ten large bolide events documented by the U.S. Air Force Technical Applications Center’s global microbarometer network between 1960 and 1972.
Elizabeth A. Silber, Rodney W. Whitaker
doaj   +1 more source

Autonomous spectrographic system to analyse the main elements of fireballs and meteors

open access: yesEarth, Planets and Space, 2018
We present a meteor observation system based on imaging CCD cameras, wide-field optics and a diffraction grating. This system is composed of two independent spectrographs with different configurations, which allows us to capture images of fireballs and ...
Francisco Ángel Espartero   +4 more
doaj   +1 more source

A Curated Dataset of Regional Meteor Events with Simultaneous Optical and Infrasound Observations (2006–2011)

open access: yesData
We present a curated, openly accessible dataset of 71 regional meteor events simultaneously recorded by optical and infrasound instrumentation between 2006 and 2011. These events were captured during an observational campaign using the all-sky cameras of
Elizabeth A. Silber   +3 more
doaj   +1 more source

Hydrodynamics from free-streaming to thermalization and back again

open access: yesPhysics Letters B, 2020
We study the evolution of the Knudsen and Reynolds numbers in (0+1)-dimensionally expanding fluids with Bjorken symmetry for systems whose microscopic mean free path rises more quickly with time than usually assumed.
Chandrodoy Chattopadhyay, Ulrich Heinz
doaj   +1 more source

Fireballs and the physical theory of meteors [PDF]

open access: yes, 1969
Fireballs and physical theory of ...
Mc Crosky, R. E., Ceplecha, Z.
core  

An Avalanche Effect Nanomodulator Triggers Cascade Ferroptosis/Cuproptosis for Immunosuppressive Microenvironment Remodeling

open access: yesAdvanced Science, EarlyView.
A nanomodulator called L‐Arginine/lificiguat@Copper‐hollow Prussian blue@Calcium phosphate nanoparticles is constructed to launch a self‐amplifying “avalanche effect” in tumor cells. The ensuing cascade, triggered by the acidic tumor microenvironment and near‐infrared light, induces calcium overload, generates a reactive oxygen species and reactive ...
Hongmei Zhou   +9 more
wiley   +1 more source

Thermalization, viscosity and the averaged null energy condition

open access: yesJournal of High Energy Physics, 2018
We explore the implications of the averaged null energy condition for thermal states of relativistic quantum field theories. A key property of such thermal states is the thermalization length.
Luca V. Delacrétaz   +3 more
doaj   +1 more source

DreamFold: A World Model to efficiently generate protein folding pathways in the latent space. [PDF]

open access: yesProtein Sci
Abstract While there is an abundance of static data for the structure of biological macromolecules, the data regarding their folding mechanisms and dynamics is scarce, posing a challenge to the training of AI models. The World Model approach, which has been very successful in robotics, can come in handy in this regard. From limited data, it can build a
Ianeselli A   +3 more
europepmc   +2 more sources

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