Results 41 to 50 of about 4,057,878 (286)
Reference Scenario and Target Identification for Autonomous Active Space Debris Removal Methods [PDF]
, 2013 To alleviate the threat of space debris, a combination of debris mitigation measures and debris environment re- mediation techniques with regard to long-term environ- ment stability is required.
Förstner, Roger +3 more
core
FEBS Letters, EarlyView.Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav +2 more
wiley +1 more source
Bayesian Adaptive Extended Kalman-Based Orbit Determination for Optical Observation Satellites
SensorsAs the number of satellites and amount of space debris in Low-Earth orbit (LEO) increase, high-precision orbit determination is crucial for ensuring the safe operation of spacecraft and maintaining space situational awareness.
Yang Guo +6 more
doaj +1 more source
Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment
Molecular Oncology, EarlyView.This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley +1 more source
An axiomatic system engineering design method based on NSGA-II algorithm applied to complex systems
Scientific ReportsThis study proposes an integrated framework that combines Axiomatic Design with Model-Based Systems Engineering, incorporating NSGA-II as an intelligent optimization engine. The framework constructs a multi-level traceability matrix linking requirements,
Xiaoqian Zhang +7 more
doaj +1 more source
STar-DETR: A Lightweight Real-Time Detection Transformer for Space Targets in Optical Sensor Systems
SensorsOptical sensor systems are essential for space target detection. However, previous studies have prioritized detection accuracy over model efficiency, limiting their deployment on resource-constrained sensors.
Yao Xiao +5 more
doaj +1 more source
Molecular Oncology, EarlyView.We established the avian chorioallantoic membrane (CAM) assay as a scalable in vivo model for studying circulating tumor cells (CTCs). Human gastrointestinal tumors spontaneously released genetically validated CTCs that were detected across multiple platforms, demonstrating that the CAM model provides an accessible tool for investigating early cancer ...
Dennis Roth +17 more
wiley +1 more source
Ground-based optical position measurements of space debris in low earth orbits [PDF]
, 2013 The increasing amount of space debris requires the satellite operators to handle a growing number of collision risk assessments in order to eventually perform collision avoidance manoeuvrers.
Hampf, Daniel +4 more
core
FEBS Open Bio, EarlyView.Time‐resolved X‐ray solution scattering captures how proteins change shape in real time under near‐native conditions. This article presents a practical workflow for light‐triggered TR‐XSS experiments, from data collection to structural refinement. Using a calcium‐transporting membrane protein as an example, the approach can be broadly applied to study ...
Fatemeh Sabzian‐Molaei +3 more
wiley +1 more source
Preliminary concept of a space-based radar for detecting mm-size space debris
, 2022 Paper 691, 12 S.Presently, there exists very little knowledge about the density and distribution of space debris of the size of a few millimeters. The reason is that ground-based systems are not sensitive enough to detect such small objects.
Rosebrock, Jens +4 more
core +1 more source