Results 61 to 70 of about 875,218 (283)
Investigating the suitability of Analytical and Semi-analytical Satellite theories for Space Object Catalogue maintenance in Geosynchronous regime [PDF]
, 2013 Currently, the number of space debris particles is about 33,500, out of which approximately 1100 are in geosynchronous orbits, which are tracked and whose orbital data are provided from US Space surveillance network, with instances of colliding and ...
Setty, Srinivas +3 more
core
Variations of the Local Time of Ascending Node for the Initial Inclinations of the KOMPSAT [PDF]
Journal of Astronomy and Space Sciences, 1999 The optimal initial inclination for minimizing the variation of the Local Time of Ascending Node(LTAN) during the three year mission of the KOMPSAT is investigated.
Byoung-Sun Lee
doaj
Optimizing photoexcitation conditions for time‐resolved X‐ray solution scattering experiments
FEBS Open Bio, EarlyView.Time‐resolved X‐ray solution scattering (TR‐XSS) is a powerful technique to visualize how proteins change their structure in real time after light activation. Selecting the right laser photoexcitation conditions—fluence, excitation geometry, and sample refresh rate—is critical to maximize the experimental signal while avoiding unwanted side effects ...
Matteo Levantino
wiley +1 more source
Assessment of numerical differentiation methods for kinematic orbit solution of the GRACE mission [PDF]
, 2013 textThe historical method of precise orbit determination is a dynamic approach. However, with the improvement of GPS tracking data and associated tracking networks, two newer methods have been developed: reduced-dynamic and kinematic.
Krishnan, Sandeep Kalyanapuram
core
AerospaceIt is well known that mean elements obtained by canonical perturbation theory only agree partially with the average dynamics of the osculating orbit. While this fact does not necessarily compromise the accuracy of corresponding perturbation solutions ...
Martin Lara
doaj +1 more source
Dual native G‐quadruplex folding is associated with chromatin looping at the MYC locus
FEBS Open Bio, EarlyView.BG4‐detectable G‐quadruplex (G4) in HaCaT and NHEK keratinocytes identified folded and unfolded G4s enriched at promoters/TSSs and active enhancers, whereas unfolded G4s also overlapped weak/poised enhancers. At MYC–PVT1, 3C‐qPCR detected enhancer–promoter looping only when G4s were simultaneously folded at both regulatory elements under native ...
Dieila Giomo de Lima +7 more
wiley +1 more source
First In-orbit Experience of TerraSAR-X Flight Dynamics Operations [PDF]
, 2007 TerraSAR-X is an advanced synthetic aperture radar satellite system for scientific and commercial applications that is realized in a public-private partnership between the German Aerospace Center (DLR) and the Astrium GmbH.
Kiehling, Reinhard +11 more
core
Modeling Earth’s Magnetic Field for PolyITAN-12U Attitude Determination and Control
Mìkrosistemi, Elektronìka ta AkustikaThis paper presents a simulation workflow that couples a Keplerian orbit propagator and the World Magnetic Model to generate along-track magnetic-field predictions for typical CubeSat LEO missions.
Dmytro V. Serhieiev +1 more
doaj +1 more source
Coherent propagation of spin-orbit excitons in a correlated metal
npj Quantum Materials, 2023 Collective excitations such as plasmons and paramagnons are fingerprints of atomic-scale Coulomb and exchange interactions between conduction electrons in metals.
Valentin Zimmermann +11 more
doaj +1 more source
FEBS Open Bio, EarlyView.Glioblastoma cells express calcitonin receptor variants (CT receptor isoforms) that may help them survive stress. Using qPCR, transcript‐specific long‐read nanopore sequencing, immunofluorescence co‐localisation and comparative sequence analysis, this study identifies a novel alternatively spliced CALCR transcript that encodes the CTb receptor isoform ...
Pragya Gupta +7 more
wiley +1 more source