Results 51 to 60 of about 4,811,554 (282)

Self-organising satellite constellation in geostationary Earth orbit [PDF]

, 2015
This paper presents a novel solution to the problem of autonomous task allocation for a self-organizing satellite constellation in Earth orbit. The method allows satellites to cluster themselves above targets on the Earth’s surface.
Colombo, Camilla, Mingotti, Giorgio, McInnes, Colin, Mushet, Garrie   +3 more
core   +2 more sources

A Single-Pass Multistatic SAR Satellites Formation Design Method for TomoSAR Data Acquisition

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Synthetic aperture radar tomography (TomoSAR) enables 3-D SAR imaging. However, most spaceborne TomoSAR data are currently acquired through repeated passes of a single satellite, during which the atmospheric and deformation phases complicate processing ...
Sisi Dong, Weidong Yu, Jili Wang, Yulun Wu, Qiang Lin, Chunle Wang, Xiaoxue Jia   +6 more
doaj   +1 more source

Adaptive Backstepping Control for Satellite Formation Flying with Mass Uncertainty [PDF]

Journal of Astronomy and Space Sciences, 2006
Satellite formation flying has become a critical issue in the aerospace engineering because it is considered as an enabling technology for many space missions.
Hyung-Chul Lim, Hyochoong Bang, Sangjong Lee   +2 more
doaj   +1 more source

Recent insights into the molecular mechanism of ubiquinol oxidation by cytochrome bc1

FEBS Open Bio, EarlyView.
The review reflects on the mechanism of the catalytic reaction in cytochrome bc1: the electron bifurcation that involves the separation of two electrons derived from the quinol oxidation to opposite sides of the enzyme across the membrane. This review summarizes the long‐standing effort to understand the mechanism of quinol oxidation catalyzed by ...
Anna Wójcik‐Augustyn, Artur Osyczka, Marcin Sarewicz   +2 more
wiley   +1 more source

Formation Flight in Low-Earth-Orbit at 150m Distance; AOCS In-Orbit Experience [PDF]

, 2012
AOCS operations for two satellites flying at ~514 km altitude with unprecedented small separation of 150 m upwards pose various new challenges and require creative solutions.
Schulze, Daniel, Herman, Jacobus, Löw, Sebastian, Daniel Schulze   +3 more
core   +1 more source

Satellite Formation Flying for Space Advertising: From Technically Feasible to Economically Viable

Aerospace, 2022
The paper presents a feasibility study of satellite formation-flying missions for space advertising. To estimate a space advertising mission viability, the global population coverage model is designed and the demonstration schedule with a focus on larger
Shamil Biktimirov, Gleb Belyj, Dmitry Pritykin   +2 more
doaj   +1 more source

Integrating Time‐Adjusted Imaging Instability Into Functional Outcome Prediction After Intracerebral Hemorrhage: Development and Validation of the HAGIV Score

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Early risk stratification may support clinical decision‐making in spontaneous intracerebral hemorrhage (ICH). We aimed to develop and internally validate HAGIV, a score integrating frequency of imaging markers (FIM), a time‐adjusted non‐contrast computed tomography (CT) metric of hematoma expansion, with established predictors for 90‐
Lei Song, Ren Ke, Anqi Chen, Yufei Fu, Hang Zhou, Rujia Wang, Liwei Zou, Yongqiang Yu, Ming Yuan, Xiaoming Qiu, Mengzhou Xue   +10 more
wiley   +1 more source

Flight Dynamics Operations of the TanDEM-X Formation [PDF]

, 2012
Since end of 2010 the German TerraSAR-X and TanDEM-X satellites are routinely operated as the first configurable single-pass Synthetic Aperture Radar interferometer in space. The two 1340 kg satellites fly in a 514 km sun-synchronous orbit.
Aida, Saika, Schlepp, Benjamin, Kirschner, Michael, Kahle, Ralph, Wermuth, Martin   +4 more
core   +1 more source

The regulatory mechanisms of satellite cell migration in skeletal muscle

Journal of Physical Fitness and Sports Medicine, 2012
Adult mammalian skeletal muscles possess a stem cell population, called muscle satellite cells. Satellite cells mainly contribute to restoring damaged or diseased muscles.
Minenori Ishido
doaj   +1 more source

Characterizing Cutaneous α‐Synuclein Deposition and Seeding Activity in Parkinson's Disease Subtypes

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Cutaneous phosphorylated α‐synuclein (p‐syn) and α‐synuclein seeding activity are promising biomarkers for Parkinson's disease (PD), but their clinical value remains uncertain due to disease heterogeneity. This study evaluates these two biomarkers in PD patients to inform phenotype‐specific diagnosis and disease severity assessment ...
Yuting Jin, Tianyuan Yang, Minglei Liu, Haiyang Luo, Jing Yuan, Ke Zhang, Xinsheng Han, Jing Yang, Yuming Xu   +8 more
wiley   +1 more source