Results 61 to 70 of about 305,238 (305)

Wideband Cooperative Localization Through Generalized Cross-Correlation

IEEE Access
This work proposes a novel algorithm for robust cooperative localization using wideband time difference of arrival (TDoA) measurements and information coupling between nodes.
Andreas Fuchs, Lukas Wielandner, Klaus Witrisal   +2 more
doaj   +1 more source

A Study on an Object oriented Modeling for the Satelite Control System Development reusing Structured Analysis and Design Approach [PDF]

Journal of Astronomy and Space Sciences, 1998
The object-oriented approach is a difficult method for engineers who are accustomed to other software development methods although it is an excellent software development approach.
Jaehoon Kim, Wonchan Jung, Sangbum Lee
doaj  

Flexible and High‐Performance Perovskite‐Polymer Composites for Dual X‐Ray and Proton Direct Detection

Advanced Optical Materials, EarlyView.
A polymer–perovskite composite obtained by mechanochemical synthesis enables thick, tunable active layers for efficient absorption of highly penetrating ionizing radiation. Vertical‐electrode detectors achieve low X‐ray detection limits and high sensitivity direct 5 MeV proton sensing.
Camilla Bordoni, Bas A. H. Huisman, Joost W. C. Reinders, Ilaria Fratelli, Massimo Chiari, Laura Basiricò, Henk J. Bolink, Andrea Ciavatti, Michele Sessolo, Beatrice Fraboni   +9 more
wiley   +1 more source

Iterative Signal Processing for Blind Code Phase Acquisition of CDMA 1x Signals for Radio Spectrum Monitoring

Journal of Electrical and Computer Engineering, 2010
This paper addresses the problem of recovering the code phase of the composite spreading sequence for a CDMA 1x signal transmitted from a handset, without the benefit of a priori information from the system.
Ron Kerr, John Lodge
doaj   +1 more source

Metal‐Metal‐π Interaction: A Pathway to Construct Organic–Inorganic Excited‐State and Supramolecular Assembly

Advanced Optical Materials, EarlyView.
An organic–inorganic mixed excited state is designed and demonstrated by combining the metal–metal and π–π interactions within a supramolecular Pt2–pyrene assembly. Directional orbital overlap between the Pt and carbon atoms gives rise to a long‐lived triplet emission, strong emission polarization, exciton–exciton annihilation, and efficient exciton ...
Ying Luo, Yangbo Zhang, Ning Zhou, Xiong Wang, Ying‐Fan Tan, Wenjie Zou, Wei Lu, Qingyun Wan   +7 more
wiley   +1 more source

Structural Modulation of Charge Transfer in Donor–Acceptor Systems: Effects of Donor Type and Connectivity

Advanced Optical Materials, EarlyView.
A coherent phthalimide acceptor platform with planar (Cz—carbazole) and spiro‐type (SAF—spiroacridine fluorene) donors enables systematic tuning of donor geometry and coupling, driving the evolution of excited‐state topology from classical CT‐TADF and fluorescence/RTP to CT‐driven and LE‐assisted TADF with OLED efficiencies ≈ 36%.
Christopher Anton Wallerius, Robert Herzhoff, Soyoung Boo, Andreas Mischok, Dirk Hertel, Jörg‐Martin Neudörfl, Daniele Fazzi, Malte C. Gather, Klaus Meerholz   +8 more
wiley   +1 more source

OSIRIS4CubeSat—The World’s Smallest Commercially Available Laser Communication Terminal

Aerospace
The New Space movement led to an exponential increase in the number of the smallest satellites in orbit in the last two decades. The number of required communication channels increased with that as well and revealed the limitations of classical radio ...
Benjamin Rödiger, Christian Roubal, Fabian Rein, René Rüddenklau, Anil Morab Vishwanath, Christopher Schmidt   +5 more
doaj   +1 more source

Exciton Radiative Lifetimes in Hexagonal Diamond Ge and SixGe1–x Alloys

Advanced Optical Materials, EarlyView.
Strong room‐temperature photoluminescence reported in hexagonal Ge conflicts with theory predicting a nearly dark band edge. First‐principles calculations of excitonic radiative lifetimes fill a key gap in this debate, showing that pristine hexagonal Ge remains intrinsically weakly emissive, while Si alloying only modestly shortens the lifetime and ...
Michele Re Fiorentin, Michele Amato, Maurizia Palummo   +2 more
wiley   +1 more source

Intramolecular FRET Cascades Enable Small Efficiency Roll‐Off in Solution‐Processed OLEDs

Advanced Optical Materials, EarlyView.
This work highlights how an intramolecular FRET design strategy in solution‐processable MR‐TADF emitters enables narrowband emission, high PLQY, and efficient exciton harvesting. The resulting hyperfluorescent solution‐processed OLEDs reach up to 20.7% EQEmax with minimal efficiency roll‐off even at 10 000 cd m−2, demonstrating strong potential for ...
Mahni Fatahi, Debasish Barman, Youichi Tsuchiya, Chihaya Adachi, Eli Zysman‐Colman   +4 more
wiley   +1 more source

Station-Keeping Maneuver Simulation for the Koreasat Spacecraft Using Mission Analysis Software [PDF]

Journal of Astronomy and Space Sciences, 1995
A series of east/west and north/south station-keeping maneuvers were simulated for the KOREASAT spacecraft which has to be maintained within ±0°.05 at the nominal longitude of 116°E. Weekly and biweekly based station-keeping maneuver plannings were used,
Byoung-Sun Lee, Jong Won Eun
doaj