Results 61 to 70 of about 164,599 (350)

Singularities in mass-loaded MHD flow: The cometary bow shock [PDF]

open access: yes, 1991
We present a one-dimensional model of the mass-loading of the solar wind by cometary ions which predicts a singularity in the mass-loaded flow at M = 2. Further, a subshock occurs when the flow speed reaches M almost-equal-to 1.15.
A. J. Coates   +5 more
core   +1 more source

Comet: An internet based platform for education in measurement [PDF]

open access: yes, 2005
The project COMET provides a multimedia training package for metrology and measurement. The package is developed by a consortium of 10 institutes from 7 European countries.
Regtien, Paulus P.L.   +4 more
core   +3 more sources

Effect of terahertz irradiation on DNA damage repair in living cells

open access: yesFEBS Open Bio, EarlyView.
We investigated the effect of terahertz (THz) wave irradiation on DNA double‐strand break (DSB) repair in living cells. We found that THz irradiation enhanced DSB repair at specific frequencies, whereas heat treatment inhibited it, indicating that this effect is nonthermal and frequency‐specific.
Yuya Ueno   +3 more
wiley   +1 more source

Predictions of the solar wind interaction with Comet Grigg-Skjellerup [PDF]

open access: yes, 1992
The planned encounter of the Giotto spacecraft with comet Grigg-Skjellerup on 10th July 1992 promises to extend our knowledge of the solar wind interaction with comets substantially.
Johnstone, AD   +2 more
core  

Detection of a Water Tracer in Interstellar Comet 2I/Borisov [PDF]

open access: yesAstrophysical Journal, 2019
We present high spectral resolution optical spectra obtained with the ARCES instrument at Apache Point Observatory showing detection of the [O i] 6300 Å line in interstellar comet 2I/Borisov.
A. McKay   +3 more
semanticscholar   +1 more source

A Novel Approach to Estimate the Transition Temperature via Dynamic Nanoindentation

open access: yesAdvanced Engineering Materials, EarlyView.
A new dynamic nanoindentation‐based method was developed that uses the stiffness ratio as an indicator of the elastic–plastic deformation contributions at different temperatures. The approach successfully identified transition temperatures in ferritic steel and distinguished them from continuously ductile austenitic steel.
Stefan Zeiler   +4 more
wiley   +1 more source

An InSAR‐GNSS Velocity Field for Iran

open access: yesGeophysical Research Letters
We present average ground‐surface velocities and strain rates for the 1.7 million km2 area of Iran, from the joint inversion of InSAR‐derived displacements and GNSS data.
Andrew R. Watson   +5 more
doaj   +1 more source

Observation of Comets [PDF]

open access: yesNature, 1922
Dr. Crommelin in his valuable “Comet Notes,” B.A.A. Journal, March 1922, p. 198, speaking of Reid's comet (1922 a), says “the comet must have been quite well placed for Northern observers last October and November, being of the 9th magnitude.” It seems that Mr. Reid discovered the comet only a short time before it passed out of sight.
openaire   +2 more sources

Laser‐Induced Graphene from Waste Almond Shells

open access: yesAdvanced Functional Materials, EarlyView.
Almond shells, an abundant agricultural by‐product, are repurposed to create a fully bioderived almond shell/chitosan composite (ASC) degradable in soil. ASC is converted into laser‐induced graphene (LIG) by laser scribing and proposed as a substrate for transient electronics.
Yulia Steksova   +9 more
wiley   +1 more source

Magmatic Processes in the East African Rift System: Insights From a 2015–2020 Sentinel‐1 InSAR Survey

open access: yesGeochemistry, Geophysics, Geosystems, 2021
The East African Rift System (EARS) is composed of around 78 Holocene volcanoes, but relatively little is known about their past and present activity.
F. Albino, J. Biggs
doaj   +1 more source

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