Results 101 to 110 of about 46,627 (302)

Small Satellites for Smart Operations. The Case for Polish Autonomous Space Capabilities [PDF]

Biuletyn Wojskowej Akademii Technicznej
Small satellites, here referred to as SmallSats, are revolutionizing how we approach space missions by providing cost-effective,flexible and innovative solutions to conduct space operations.
Adam Sowa
doaj   +1 more source

Memristor‐Driven Active‐Matrix Organic Light‐Emitting Diode for Energy Efficient and High‐Resolution Displays

Advanced Functional Materials, EarlyView.
This study demonstrates that memristors can replace conventional 2T–1C driving circuits with simplified 1T–1 m architectures by exploiting resistance switching. With ultra‐low switching voltages (< ±0.2 V) and multi‐level resistance states, the memristors precisely control the current injected into organic light‐emitting diodes (OLEDs).
Dong Hyun Kim, Nahyun Kim, Seok Hee Hong, Ho Jin Lee, Jin Suk Oh, Jae Seong Park, Tae Geun Kim   +6 more
wiley   +1 more source

A Predictive Algorithm For Attitude Stabilization And Spin Control Of Small Satellites

, 1999
This paper presents a new algorithm for attitude stabilization and spin control of small satellites using only electromagnetic actuation. The approach takes advantage of the time-varying nature of the problem (the geomagnetic field changes through the ...
P. Tavares, P. Alves, P. Lima, P. Tabuada, Geomagnetic Field Interaction, Keywords Leo Satellites   +5 more
core  

Polymer Interface Enables Reversible Quasi‐Solid Sulfur Conversion in Sodium‐Sulfur Batteries

Advanced Functional Materials, EarlyView.
The polymer interface enables a stable quasi‐solid sulfur conversion pathway in room‐temperature Na─S batteries. The coating regulates Na+ transport, stabilizes the cathode–electrolyte interphase, and accommodates mechanical stress, suppressing electrolyte decomposition and sulfur migration, thereby improving reaction uniformity, reducing polarization,
Reza Andaveh, Ying Zhao, Enzhong Jin, Zixin Zhang, Vinicius Martins, Parham Pirayesh, Yi Gan, Yi Yuan, Yijia Wang, Frederick Benjamin Holness, Changhong Cao, Jun Song, Yang Zhao   +12 more
wiley   +1 more source

Orbit Precision Analysis of Small Man-Made Space Objects in LEO Based on Radar Tracking Measurements

, 2012
The German Space Operations Center (GSOC) performs collision avoidance for 11 LEO and 2 GEO satellites. Risk detection and maneuver decisions strongly depend on the computed probability of collision that is driven by the anticipated orbit precision of ...
Letsch, Klemens, Leushacke, Ludgar, Weigel, Martin, Kirschner, Michael, Kahr, Erin, Kahle, Ralph, Choi, Paul   +6 more
core  

Rationally Designed Bilayer Passivation Strategy for High‐Performance Vacuum‐Processed Perovskite Solar Cells

Advanced Functional Materials, EarlyView.
A bilayer “Anchor‐and‐Seal” passivation strategy using EDAI2 and 4MeO‐PEAI effectively mitigates surface defects in vacuum‐processed perovskite films through synergistic hydrogen bonding and Lewis base coordination. This approach optimizes interfacial energy alignment and suppresses non‐radiative recombination, enabling vacuum‐deposited p‐i‐n ...
Mohammadhossein Kohan, Sang‐Heon Lee, Jaswinder Singh, Sung‐Nam Kwon, Seok‐In Na   +4 more
wiley   +1 more source

Optimized separation system for small satellites missions

, 2011
The launch phase is a critical step in a spacecraft operative life and it is therefore mandatory to provide for a robust and reliable interface between the launch vehicle and the spacecraft, focusing the attention at the same time on both the mechanical ...
A. Corbelli, D. Bruzzi, TORTORA, PAOLO
core  

Fault Tolerant Attitude Estimation for Small Satellites

, 2021
Small satellites use commercial off-the-shelf sensors and actuators for attitude determination and control (ADC) to reduce the cost. These sensors and actuators are usually not as robust as the available, more expensive, space-proven equipment.
Hacızade, Cengiz, Söken, Halil Ersin
core  

Machine Learning‐Assisted Inverse Design of Soft and Multifunctional Hybrid Liquid Metal Composites

Advanced Functional Materials, EarlyView.
A machine learning framework is presented for inverse design of synthesizable multifunctional composites containing both liquid metal and solid inclusions. By integrating physics‐based modeling, data‐driven prediction, and Bayesian optimization, the approach enables intelligent design of experiments to identify optimal compositions and realize these ...
Lijun Zhou, Yunsik Ohm, Ren‐Mian Chin, Olivia Kerr, Krithika Manohar, Mohammad H. Malakooti   +5 more
wiley   +1 more source

Orbital Geometry‐Governed Response of Pressure‐Tunable Quantum Defects in hBN

Advanced Functional Materials, EarlyView.
Defects in hBN act as ultrasensitive quantum manometers when the energy of the intradefect optical transitions is modified by lattice compression. The orbital geometry of the electron wave functions governs how electron hopping and Coulomb interactions react uniquely to the reduction of the van der Waals gap and in‐plane compression, leading to robust ...
Magdalena Grzeszczyk, Danis I. Badrtdinov, Kenji Watanabe, Takashi Taniguchi, Cyrus E. Dreyer, Malte Rösner, Maciej Koperski   +6 more
wiley   +1 more source