Results 121 to 130 of about 46,627 (302)

Preliminary outline of a distributed radar based on very large baselines for parasitic remote sensing

, 2017
The concept of a sparse radar for parasitic remote sensing is presented. The receiving antenna is distributed on a formation of small satellites and exploits the backscattered echoes of existing low Earth orbit transmitters.
Sarno, Salvatore, D'Errico, Marco, FASANO, GIANCARMINE   +2 more
core  

3D Printing Innovations in Polymeric Porous and Patterned Architecture

Advanced Functional Materials, EarlyView.
Polymeric foams occupy a unique structural space between dense solids and open networks, where engineered void fraction governs mechanical compliance, thermal resistance, and mass transport. Additive manufacturing now enables precise spatial control over cellular architecture, unlocking designer foam structures across applications spanning crash ...
Dhanush Patil, Sri Vaishnavi Thummalapalli, Clarissa Westover, Arunachalam Ramanathan, M. Taylor Sobzcak, Roumika Patil, Qixuan Xiang, Tiantian Li, Sui Yang, Timothy E. Long, Hongyue Sun, Xianqiao Wang, Yang Liu, Kenan Song   +13 more
wiley   +1 more source

PRISMA - Formation Flying Project Close to Launnch

, 2010
The PRISMA project is a technical demonstration mission for formation flying and rendezvous in space. The mission can be considered as an in-obit test-bed where different experiments involving Guidance, Navigation and Control (GNC) algorithms, sensors ...
Persson, S., Jörgensen, John, Harr, J., Joergensen, J., Harr, Jon, D'Amico, Simone, D'Amico, S., Persson, Staffan   +7 more
core  

Low bandwidth, image transmission amateur microsatellites [PDF]

, 1993
Some recent amateur packet satellites carry open access digital store- and-forward transponders which implement common communication protocols known as PACSAT PROTOCOL SUITE.
Mwambela, A.J.
core  

In Situ Crystalline‐Amorphous Composite Oxide Structure Suppressing Thermal Wear Instability for Refractory Multi‐Principal Element Alloy

Advanced Functional Materials, EarlyView.
An effective strategy is developed to overcome the medium temperatures wear resistance degradation in refractory multi‐principal element alloys. By utilizing chemical short‐range ordering to trigger oxygen‐induced amorphization, a composite oxide structure is formed, which combines high hardness with robust stiffness.
Xuhui Pei, Jianbao Zhang, Hanming Wang, Yin Du, Tao Yang, Ji‐Jung Kai, Benyebka Bou‐Saïd, Haifeng Wang   +7 more
wiley   +1 more source

The shapes of small satellites

Icarus, 1989
Limb coordinates from spacecraft images have been used to measure the shapes of the small satellites of Mars, Jupiter, Saturn, and Uranus, with a view to the quantitative testing of those shapes' physical significance. A comparison of eight small satellites' ellipsoidal models with equilibrium ellipsoids indicates that the shapes of even moderately ...
openaire   +1 more source

Self‐Adaptive Anhydrous Passivation Mitigates Open‐Circuit Voltage Loss in Pb‐Sn Mixed Perovskite Solar Cells

Advanced Functional Materials, EarlyView.
In this report, a self‐adaptive anhydrous passivation strategy is introduced by incorporating trimellitic anhydride (TMAH) into the perovskite precursor. In situ hydrolysis of TMAH yields trimellitic acid (TMA); ‐C═O/‐COO− groups of TMAH/TMA form a chelate with undercoordinated Pb2+/Sn2+, regulate nucleation, promote (100) orientation, passivate ...
Md. Ataur Rahman, Md. Abdul Karim, Md. Emrul Kayesh, Siliang Cao, Shamim Ahmmed, Kiyoto Matsuishi, Ashraful Islam   +6 more
wiley   +1 more source

Remote sensing of aerosols with small satellites in formation flight. [PDF]

Atmos Meas Tech, 2018
Knobelspiesse K, Nag S.
europepmc   +1 more source

MAC - NEXT GENERATION IMAGING SYSTEM FOR SMALL SATELLITES

, 2002
Hlm.
Hafizah Mohd Nasir, Abdul Aziz Abdul Rasheed, Asma Hani Abdul Hai, Mohd. Rushdan   +3 more
core  

Resolving the Cu(bdc) Conundrum: Identifying Non‐Porous Packing of Prototypical Coordination‐Network Thin Films Combining Advanced Diffraction Techniques and Computational Modelling

Advanced Functional Materials, EarlyView.
Solution‐processed Cu(bdc) forms prototypical MOF thin films for which a multitude of not fully satisfactory structural models have been suggested. Combining rotating grazing‐incidence diffraction and X‐ray reflectivity on two complementary samples with density‐functional theory, we first discard the previously suggested models and then identify a non ...
Narges Taghizade, Mario Fratschko, Robbin Steentjes, Mercedes Linares‐Moreau, Paolo Falcaro, Christof Wöll, Roland Resel, Egbert Zojer   +7 more
wiley   +1 more source