Results 101 to 110 of about 107,756 (305)

Crew Transfer Options for Servicing of Geostationary Satellites [PDF]

, 2012
In 2011, NASA and DARPA undertook a study to examine capabilities and system architecture options which could be used to provide manned servicing of satellites in Geostationary Earth Orbit (GEO).
Cerro, Jeffrey A.
core   +1 more source

Security Attacks Against the Availability of Low Earth Orbit Satellite Networks [PDF]

, 2023
Seongho Yoon, Miyoung Kang, Jin‐Young Choi   +2 more
openalex   +1 more source

Infrared Nanocrystals for Space Application: Hardness to Irradiations

Advanced Functional Materials, EarlyView.
This article investigates infrared HgTe nanocrystals under X‐ray and ion irradiation, revealing remarkable radiation hardness. It uncovers distinct degradation mechanisms and shows that the nanomaterial outperforms integrated electronics. The results position colloidal nanocrystals as promising candidates for resilient space and harsh‐environment ...
Alexandre Neyret, Dario Mastrippolito, Bingbing Xia, Adrien Khalili, Maxime Lebreton, Giorgia Strobbia, Albin Colle, Marco Paye, Mariarosa Cavallo, Erwan Bossavit, Claire Abadie, Yoann Prado, Debora Pierucci, Victor Parahyba, Francois Coursaget, David Darson, Emrick Briand, Ian Vickridge, Stephane Demiguel, Sebastien Massenot, Jean‐Marc Belloir, Vincent Goiffon, Emmanuel Lhuillier   +22 more
wiley   +1 more source

Orbital maintenance of endoatmospheric low earth-orbiting satellites

, 1991
The optimization of spacecraft trajectories in vacuum has received extensive consideration since the inception of space flight, yet the effects of atmosphere have been largely neglected. The advent of low Earth-orbiting, large satellites and platforms necessitates that atmosphere be included in the optimization process.
openaire   +1 more source

Surface Diffusion in SnTe‐PbTe Monolayer Lateral Heterostructures

Advanced Functional Materials, EarlyView.
The lateral heterostructures between 2D materials often suffer from the interdiffusion at the interfaces. Here, a surface diffusion mechanism is found to be dominating at the interfaces between semiconducting SnTe and PbTe monolayers. Atomically sharp interfaces can be achieved by suppressing this diffusion process. ABSTRACT The construction of complex
Jing‐Rong Ji, Zi'Ang Gao, Shiva Prasad Poudel, Rui‐Qi Cao, Tianzhe Chen, Luxin Li, Chong Liu, Salvador Barraza‐Lopez, Stuart S. P. Parkin, Kai Chang   +9 more
wiley   +1 more source

Modeling Orbital Decay of Low-Earth Orbit Satellites due to Atmospheric Drag: A Simplified Analytical Approach [PDF]

S. Mahapatra
openalex   +1 more source

BLOOSTAR, The Enabler for More Efficient Satellites in Low Earth Orbit [PDF]

, 2018
José Mariano López Urdiales, Izan Peris Martí, Guillaume Girard   +2 more
openalex   +1 more source

All‐Aqueous Pullulan Fibers Enabling Visible‐to‐Near‐Infrared Waveguiding with Mechanical and Thermal Resilience

Advanced Functional Materials, EarlyView.
Pullulan, a biomass‐derived polysaccharide, is transformed into transparent optical fibers using a solvent‐free borax hydrogel‐spinning method. The fibers outperform PMMA with ≈200 MPa tensile strength and 200 °C stability, while uniquely guiding visible‐to‐NIR light and enabling additive‐free humidity sensing.
Yuya Fukata, Aayush Kumar Jaiswal, Ari Hokkanen, Hannes Orelma, Tadahisa Iwata   +4 more
wiley   +1 more source

WARC 92 and some thoughts as to its impact on the NASA propagation program [PDF]

The World Administrative Radio Conference of 1992 (WARC 92) was held in Torremolinos, Spain, 3 Feb. - 3 Mar. 1992. Major topics considered included shortwave broadcasting, mobile and mobile-satellite service, broadcasting satellite service (sound and ...
Flock, Warren L., Smith, Ernest K.
core   +1 more source

A Routing algorithm for low earth orbit satellite networks

, 1995
ÖZET YERE YAKIN YORUNGELI UYDU A?LARI İÇİN BİR YOL ATAMA ALGORİTMASI Cantekin Dinçerler Elektrik ve Elektronik Mühendisliği Bölümü Yüksek Lisans Tez yöneticisi: Doç. Dr. Erdal Arıkan Temmuz 1995 Bu çalışmada yere yakın yörûngeli uydu takımlarının geometrik özellikleri ele alınır ve önerilen bir yol atama algoritması için bir uydu ağının başarımı ince ...
openaire   +3 more sources