Results 151 to 160 of about 869,960 (293)

Routing In Leo-Based Satellite Networks

open access: yes, 1999
Several strategies have been proposed for routing in a low earth orbit (LEO) satellite system. Some of them are based on the Internet Protocol (IP) and a few on asynchronous transfer mode (ATM) switching.
Hosame Abu-amara   +2 more
core  

Development of a relative motion model for satellite formation flying around L2 [PDF]

open access: yes, 2004
Paper given at Dynamics and Control of Systems and Structures in Space (DCSSS), 6th conference, Riomaggiore, Italy, July 2004A technique for satellite formation flying modelling in LEO is applied at L2.
Roberts, Jennifer A.
core  

Opposite Trap‐State Evolution Pathways Govern Endurance and Retention Failure in Amorphous Chalcogenide Memory

open access: yesAdvanced Science, EarlyView.
GeSbSe selector‐only memory devices are investigated through physical and electrical analyses to reveal opposite trap‐state evolution pathways governing reliability degradation. Endurance cycling drives Se migration, transitioning traps from deep to shallow states.
Byung Jun Lee   +3 more
wiley   +1 more source

LEO micro-satellite attitude determination using GPS

open access: yes, 2000
GPS attitude determination has received more and more attention in GPS research community. Nanyang Technological University will launch a Low Earth Orbit (LEO) micro-satellite, on which a GPS attitude determination experiment will be carried out.Master ...
Yu, Xiaodong.
core  

Unraveling the Effects of Depolarization in Ultrathin Barium Titanate

open access: yesAdvanced Science, EarlyView.
This article employs synchrotron‐based spectroscopy, time‐resolved electrical measurements, and phase‐field simulations to establish reverse‐domain formation as the mechanism of polarization loss in ultrathin BaTiO3${\rm BaTiO}_3$ films as a critical obstacle to low‐voltage ferroelectric devices.
Thomas Lee   +6 more
wiley   +1 more source

Determination of Gene‐Level Fitness Contributions Across the Mucin‐Utilization Network of Bacteroides thetaiotaomicron

open access: yesAdvanced Science, EarlyView.
Genome‐wide CRISPRi and RNA‐seq resolve how B. thetaiotaomicron converts host mucosal glycans into fitness. The study reveals a layered mucin‐utilization architecture in which capsular polysaccharides constrain surface access, extracellular CAZymes and peptidases show functional redundancy, and intracellular catabolic pathways create discrete metabolic
Kangsan Kim   +5 more
wiley   +1 more source

Security Performance Analysis of LEO Satellite Constellation Networks under DDoS Attack. [PDF]

open access: yesSensors (Basel), 2022
Zhang Y   +8 more
europepmc   +1 more source

Electron‐Rich Nickel Enabled by Charge Transfer in Multimetal Nanostructures for Efficient Ammonia‐to‐Hydrogen Conversion

open access: yesAdvanced Science, EarlyView.
A charge‐transfer‐engineered Ni catalyst derived from an atomically mixed layered precursor enables efficient ammonia‐to‐hydrogen conversion. Cr‐to‐Ni electron transfer creates electron‐rich Ni active sites that favor NH3 adsorption, modify the dehydrogenation energetics, and weaken N2 binding to facilitate product desorption. This electronically tuned
Donghyeok Kim   +9 more
wiley   +1 more source

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