Results 91 to 100 of about 47,819,563 (268)

Precise Orbit Determination of BDS MEO Satellites Based on Satellite TT&C Stations

International Journal of Aerospace Engineering, 2016
A novel method, which is based on the triple-frequency combination and Space-Based Telemetry, Tracking, and Command (STT&C) stations, is proposed in this paper.
Kezhao Li, Zhiwei Li, Lin Chai, An-min Ding, Jin-ben Wei, Long Li   +5 more
doaj   +1 more source

Septin 9 PB domains coordinate centrosome positioning and microtubule acetylation to control epithelial polarity

FEBS Letters, EarlyView.
Septin 9 polybasic domains couple phosphoinositide‐rich membrane binding to centrosome positioning, Golgi organization, and microtubule acetylation to control epithelial polarity. Their loss disrupts this axis, causing centrosome mispositioning, Golgi fragmentation, reduced microtubule acetylation, and polarity inversion via upregulation of the ...
Ting ting Cai, Mohyeddine Omrane, Nassima Benzoubir, Didier Samuel, Ama Gassama‐Diagne   +4 more
wiley   +1 more source

An optimal gains matrix for time-delay feedback control [PDF]

, 2009
In this paper we propose an optimal time-delayed feedback control (TDFC) for tracking unstable periodic orbits (UPOs). It is shown that TDFC will drive a trajectory onto a periodic orbit while minimising an integral of a cost function of the error in ...
Biggs, James, Biggs, J.D., BIGGS, JAMES DOUGLAS, James Biggs, Colin R.McInnes, McInnes, Colin R., McInnes, C.R.   +6 more
core   +1 more source

Robust Onboard Orbit Determination Through Error Kalman Filtering

Aerospace
Accurate and robust on-board orbit determination is essential for enabling autonomous spacecraft operations, particularly in scenarios where ground control is limited or unavailable.
Michele Ceresoli, Andrea Colagrossi, Stefano Silvestrini, Michèle Lavagna   +3 more
doaj   +1 more source

Rab14 regulates the transport of human papillomavirus to the trans‐Golgi network for infectious cell entry

FEBS Letters, EarlyView.
This study reveals that the small GTPase Rab14 is necessary for human papillomavirus (HPV) infection and plays an essential role in the transport of virions to the trans‐Golgi network (TGN). HPV in the early endosome (EE), which harbors GTP‐bound Rab14, is transported to the TGN through the switch of Rab14 from its GTP‐bound to GDP‐bound form.
Yoshiyuki Ishii, Iwao Kukimoto
wiley   +1 more source

Strategies for in-orbit calibration of drag-free control systems

, 2008
Drag-Free Satellites (DFS) are a class of scientific satellite missions designed for research on fundamental physics as well as geodesy. They consist, basically, of a small inner satellite (test mass) located in a cavity inside a larger satellite, the ...
Leite Filho, Waldemar Castro, Theil, Stephan, Guilherme, Michel Silas   +2 more
core   +1 more source

Orbit/CLASP is required for germline cyst formation through its developmental control of fusomes and ring canals in Drosophila males.

PLoS ONE, 2013
Orbit, a Drosophila ortholog of microtubule plus-end enriched protein CLASP, plays an important role in many developmental processes involved in microtubule dynamics.
Chie Miyauchi, Daishi Kitazawa, Itaru Ando, Daisuke Hayashi, Yoshihiro H Inoue   +4 more
doaj   +1 more source

Degradation mechanism of the von Willebrand factor A2 domain by nattokinase

FEBS Letters, EarlyView.
Nattokinase, a natto‐derived protease, exhibits potent antithrombotic effects. This study demonstrates that nattokinase directly cleaves the von Willebrand factor (vWF) A2 domain in vitro. Unlike the native regulator ADAMTS13, nattokinase degrades folded vWF independently of shear stress.
Ryuichi Hyakumoto, Masatomo So, Ayako Furukawa, Kenji Sugase   +3 more
wiley   +1 more source

Precise Orbit Determination for the TerraSAR-X Mission

, 2006
The TerraSAR-X synthetic aperture radar mission relies exclusively on GPS tracking for a precise post-facto orbit reconstruction. Besides a redundant MosaicGNSS single-frequency receiver, the satellite carries the Integrated GPS Occultation Receiver ...
Gill, Eberhard, Garcia-Fernandez, Miquel, Montenbruck, Oliver, Yoon, Yoke   +3 more
core  

An aerostable drag-sail device for the deorbit and disposal of sub-tonne, low earth orbit spacecraft [PDF]

, 2006
There is an increasing amount of debris in low Earth orbit arising from the disintegration and collision of old spacecraft which have not been removed from orbit. A ‘bolt-on’ deorbit device to be attached to new spacecraft is therefore proposed, which
Harkness, Patrick George
core