Results 191 to 200 of about 602,455 (339)

Precise satellite orbit determination with particular application to ERS-1 [PDF]

, 1993
The motivation behind this study is twofold. First to assess the accuracy of ERS-1 long arc ephemerides using state of the art models. Second, to develop improved methods for determining precise ERS-1 orbits using either short or long arc techniques. The
Fernandes, Maria Joana Afonso Pereira
core  

Hydrophobicity causes anomalous migration of cystine/glutamate antiporter SLC7A11 in SDS‐PAGE with low acrylamide concentration

FEBS Open Bio, EarlyView.
SLC7A11 frequently migrates faster in SDS‐PAGE. The present study found that the high hydrophobicity of SLC7A11 causes its anomalous migration in SDS‐PAGE with a low concentration of acrylamide gel. Replacing isoleucine with asparagine reduced hydrophobicity and restored its normal migration at 55 kDa, revealing the role of hydrophobicity and gel ...
Nsengiyumva Emmanuel, Qian He, Yixin Kang, Dianbao Zhang, Min Gao, Minglin Wang, Kexin Fan, Jingwen Xiong, Shaobo Wu, Botao Fa, Zhengtao Xiao, Yingfang Niu, Jun Yao, Yilei Zhang   +13 more
wiley   +1 more source

The Geoscience Laser Altimetry/Ranging System (GLARS) [PDF]

The Geoscience Laser Altimetry Ranging System (GLARS) is a highly precise distance measurement system to be used for making extremely accurate geodetic observations from a space platform.
Abshire, J. B., Bufton, J. L., Cohen, S. C., Degnan, J. J., Garvin, J. B.   +4 more
core   +1 more source

Geophysical Exploration of Vesta [PDF]

, 2012
Dawn’s year-long stay at Vesta allows comprehensive mapping of the shape, topography, geology, mineralogy, elemental abundances, and gravity field using it’s three instruments and highprecision spacecraft navigation.
Asmar, S.W., Jaumannn, R., Konopliv, A.S., Park, R.S., Preusker, Frank, Raymond, C. A., Russell, C.T., Smith, D.E., Toplis, M. J., Zuber, M.T.   +9 more
core  

The spectroscopic orbit of Capella revisited

, 2011
Context. Capella is among the few binary stars with two evolved giant components. The hotter component is a chromospherically active star within the Hertzsprung gap, while the cooler star is possibly helium-core burning. Aims.
Barlow, Böhm-Vitense, Danby, Gray, Griffin, Hummel, K. G. Strassmeier, Katsova, Lindegren, M. Weber, Pickles, Scarfe, Strassmeier, Strassmeier, Strassmeier, Strassmeier, Struve, Torres, Weber   +18 more
core   +1 more source

Possible role of human ribonuclease dicer in the regulation of R loops

FEBS Open Bio, EarlyView.
R loops play an important role in regulating key cellular processes such as replication, transcription, centromere stabilization, or control of telomere length. However, the unscheduled accumulation of R loops can cause many diseases, including cancer, and neurodegenerative or inflammatory disorders. Interestingly, accumulating data indicate a possible
Klaudia Wojcik, Paulina Krzeminska, Anna Kurzynska‐Kokorniak   +2 more
wiley   +1 more source

Precise orbit determination for NASA's earth observing system using GPS (Global Positioning System) [PDF]

An application of a precision orbit determination technique for NASA's Earth Observing System (EOS) using the Global Positioning System (GPS) is described.
Williams, B. G.
core   +1 more source

Precise orbit determination for GPS satellites [PDF]

, 1990
The NAVSTAR Global Positioning System (GPS) has been under development by the US Department of Defense since 1973. Although GPS was developed for precise instantaneous position and velocity determination, it can be used for high precision relative ...
Whalley, Stephen
core  

Soman induces endoplasmic reticulum stress and apoptosis of cerebral organoids via the GRP78‐ATF6‐CHOP signaling pathway

FEBS Open Bio, EarlyView.
Cerebral organoids were employed as a novel model to explore the neurotoxicity of soman. Soman inhibited acetylcholinesterase activity, increased cell apoptosis and upregulated endoplasmic reticulum (ER) stress markers glucose‐regulated protein 78 (GRP78), activating transcription factor 6 (ATF6) and C/EBP homologous protein (CHOP).
Yue Wei, Zhanbiao Liu, Jingjing Shi, Qian Jin, Wenqian Chen, Xuejun Chen, Liqin Li, Hui Chen   +7 more
wiley   +1 more source

Non-Cooperative LEO Satellite Orbit Determination Using Single Station for Space-Based Opportunistic Positioning

Remote Sensing
Space-based opportunistic positioning is a crucial component of resilient positioning, navigation, and timing (PNT) systems, and it requires the acquisition of orbit information for non-cooperative low Earth orbit (LEO) satellites.
Ruofan Deng, Honglei Qin, Yu Zhang
doaj   +1 more source