Results 71 to 80 of about 15,357 (267)
Tailoring Model‐Based Systems Engineering for Sub‐100 g PlanarSats: A Power‐First View Stack
Systems Engineering, EarlyView.ABSTRACT This paper addresses how to apply model‐based systems engineering (MBSE) to ultrasmall planar satellites under severe power and resource constraints. PlanarSats are sub‐100‐gram spacecraft built as single printed‐circuit boards where the same surface must host both electronics and solar cells, so power generation, geometry, and component ...
Mehmet Şevket Uludaǧ +1 more
wiley +1 more source
Design of drive control for digital transmission relay antenna based on FPGA miniaturization
Dianzi Jishu Yingyong, 2019 In order to meet the requirements of spacecraft miniaturization design, a single chip anti-fuse FPGA is used as main control chip for driving relay antenna.
Hou Chao +3 more
doaj +1 more source
CAAI Transactions on Intelligence Technology, EarlyView.ABSTRACT In recent years, the widespread application of deep reinforcement learning (DRL) in autonomous systems has highlighted the importance of achieving high sample efficiency under sparse reward conditions. To improve sample efficiency in sparse reward environments, this paper proposes a reinforcement learning framework built upon the Soft Actor ...
Jingyi Huang +5 more
wiley +1 more source
Performance Prediction of Hatch Cover Drive Assembly in Space Environment
IEEE Access, 2019 The performance of the Hatch Cover Drive Assembly operated in space is quite important for aircrafts. However, it is hard to experimental studies in space.
Pan Bo +6 more
doaj +1 more source
New Challenges for European Space Industrial Policy
Global Policy, EarlyView.ABSTRACT The European space industry is globally competitive but faces challenges due to fragmented governance, reliance on commercial markets, and increased international competition. The European Union (EU) has become a major stakeholder in this sector, with a ‘fragmented institutional market’ shaped by policies, initiatives and programmes at ...
Sara Dalledonne +2 more
wiley +1 more source
Global Policy, EarlyView.ABSTRACT The European Union's proposed Space Law aims to establish a unified approach for sustainable space activities across the EU. While the EU's satellite constellations contribute to sustainability efforts, they can also have negative environmental impacts.
Elena Cirkovic, Vitali Braun
wiley +1 more source
Global Policy, EarlyView.ABSTRACT On‐orbit rendezvous and docking constitute one of the most technically challenging activities in the history of space activities. As space endeavours mature to crewed missions, space rendezous and docking technologies (RDT) emerge as an area of technological innovation critical to advances in future crewed space exploration.
Nikita Chiu, Markus Kornprobst
wiley +1 more source
Global Policy, EarlyView.ABSTRACT This article examines what is known at this stage, before the envisaged publication of the legislative proposal by the European Commission in March/April 2025, about the European Union's Space Act, focusing on its potential application to non‐EU operators.
Ingo Baumann, Katharina Prall
wiley +1 more source
Numerical Calculation of Gas–Liquid Two-Phase Flow in Tesla Valve
AerospaceIn this paper, the gas–liquid two-phase flow within a Tesla valve under zero-gravity conditions is numerically studied. Based on the VOF model and the inlet two-phase separation method, the forward and reverse flow patterns and pressure drop changes in a
Jie Gong +3 more
doaj +1 more source
The Great Cosmic Silence: What Does the Fermi Paradox Tell About the Future of Humanity?
Global Policy, EarlyView.ABSTRACT This article examines how institutional time horizons shape the long‐term survival prospects of human technological civilisation. While research on global catastrophic and existential risks has expanded, the temporal structures of political‐economic institutions remain underexamined.
Heikki Patomäki
wiley +1 more source