Results 81 to 90 of about 615,181 (292)
High-Precision Attitude Post-Processing and Initial Verification for the ZY-3 Satellite
Remote Sensing, 2014 Attitude data, which is the important data strongly correlated with the geometric accuracy of optical remote sensing satellite images, are generally obtained using a real-time Extended Kalman Filter (EKF) with star-tracker and gyro data for current high ...
Xinming Tang +3 more
doaj +1 more source
, 2003 Talk from 2003 Computing in High Energy and Nuclear Physics (CHEP03), La Jolla, Ca, USA, March 2003. PSN THLT 004.
openaire +2 more sources
Synergistic perspectives—How single‐molecule biophysics complement biochemical understanding
FEBS Letters, EarlyView.In this review, we discuss how ensemble biochemistry and single‐molecule approaches are complementary, outline commonly used single‐molecule techniques, and illustrate their relevance through two representative case studies: chromatin organization by SMC complexes and pathway choice during DNA double‐strand break repair.
Sara De Bragança +2 more
wiley +1 more source
FEBS Letters, EarlyView.How do genomes gain new functional parts? In eukaryotes, which tend to evolve under weak selection, much of the genome is junk. Palazzo and Qiu borrow the logic of Markov chains to show how non‐functional DNA becomes functional through the appearance of intermediate states, which arise due to epistasis, buffering, and biochemical messiness, allowing ...
Alexander F. Palazzo, Yi Qiu
wiley +1 more source
Multi-functional star tracker — future perspectives
Acta Polytechnica, 2011 This paper focuses on the idea of a multi-functional wide-field star tracker (WFST) and provides a description of the current state-of-the-art in this field. The idea comes from a proposal handed in to ESA at the beginning of 2011.
J. Roháč, M. Řeřábek, R. Hudec
doaj
Debris Detection Using Star Tracker Concept Verification [PDF]
This paper demonstrates the concept of space debris detection using star trackers. Arcsec’s Sagitta star tracker is an optical sensor designed to determine spacecraft attitude based on captured star images. The Sagitta star tracker processes these images
Vandoren, Bram +4 more
core +1 more source
FEBS Letters, EarlyView.Synechocystis strains deficient in succinate dehydrogenase (SDH) secrete more succinate than the WT under dark anaerobic conditions, supporting that SDH then primarily acts as SDH, not as a fumarate reductase. L‐aspartate oxidase (Laspo) from Synechocystis is functional under anaerobic conditions, reducing fumarate to succinate.
Kateryna Kukil +3 more
wiley +1 more source
Focal Adjustment for Star Tracker
Defence Science Journal, 2010 Technique of measuring intensity distribution and size of spot image developed has been discussed, which is especially suitable for defocus adjustment in ground test of star tracker. A novel approach for choosing a proper defocusing position has been proposed based on collimator, Gaussian surface fitting method, and other ordinary instruments.
Liu Hai-bo +6 more
openaire +1 more source
A Star Tracker based Attitude Determination System
, 2021 The development of an Attitude Determination System (ADS) based on a Star Tracker is described. The ability to achieve the performance required to enable optical alignment from Low Earth Orbit (LEO) to ground station is investigated.
Papotti, Gabor
core
Molecular Oncology, EarlyView.Dormant cancer cells can hide in distant organs for years, evading treatment and the immune system. This review highlights how signals from the surrounding tissue and immune environment keep these cells inactive or trigger their reawakening. Understanding these mechanisms may help develop therapies to eliminate or control dormant cells and prevent ...
Kanishka Tiwary +1 more
wiley +1 more source