Results 61 to 70 of about 2,815 (307)

Autonomous Optimal Absolute Orbit Keeping through Formation Flying Techniques

Aerospace, 2023
In this paper, the problem of autonomous optimal absolute orbit keeping for a satellite mission in Low Earth Orbit using electric propulsion is considered.
Ahmed Mahfouz, Gabriella Gaias, D. M. K. K. Venkateswara Rao, Holger Voos   +3 more
doaj   +1 more source

Oxygen‐Tunnel Indium Tin Oxide Vertical Channel Transistors with Enhanced Current Density and Reliability for Monolithic 3D Compute‐In‐Memory Systems

Advanced Functional Materials, EarlyView.
Oxygen‐tunnel (OT) indium tin oxide (ITO) vertical channel transistors (VCTs) enable reliable, high‐density gain‐cell memory for monolithic 3D integration. A sandwiched SiN/SiO2/SiN OT stack selectively regulates oxygen transport, suppressing parasitic electrode oxidation while stabilizing channel oxygen vacancies, thereby suppressing carrier injection
Hyeonho Gu, Haksoon Jung, Yongwoo Lee, Hoichang Jeong, Yanfeng Zhao, Heesoo Yang, Minho Park, Hyeonjin Lee, Seunghun Baek, Minju Song, Junghwan Kim, Youngmin Jo, Hyunjin Park, Munhyeon Kim, Jae‐Joon Kim, Kyuho Jason Lee, Byungjo Kim, Jimin Kwon   +17 more
wiley   +1 more source

Dual Satellite Operations in Close Formation Flight [PDF]

, 2012
TerraSAR-X (TSX) and TanDEM-X (TDX) are two satellites flying in low-earth orbit. Both satellites are equipped with a synthetic aperture radar (SAR) payload for Earth observation. TSX has been launched in 2007 and TDX in 2010.
Mrowka, Falk, Zimmermann, Steffen, Maurer, Edith, Hofmann, Harald   +3 more
core   +1 more source

Chiral Phase Change Nanomaterials

Advanced Functional Materials, EarlyView.
This work demonstrates reversible, non‐volatile phase transitions in chiral Ge2${\rm Ge}_2$Sb2${\rm Sb}_2$Te5${\rm Te}_5$ (GST) nanohelices for high‐speed optical modulation of chirality and dynamic control of the state of polarization (SOP). The chiral nanostructures are fabricated using a highly directional, wafer‐scale physical vapor deposition ...
Joshua A. Burrow, Md Shah Alam, Riad Yahiaoui, Evan M. Smith, Ryan Laing, Jules Gardener, Thomas A. Searles, Piyush J. Shah, Shivashankar Vangala, Joshua R. Hendrickson, Andrew M. Sarangan, Imad Agha   +11 more
wiley   +1 more source

PRISMA - Formation Flying Project Close to Launnch [PDF]

, 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  

Microfluidic Nano‐Assembly of Red‐Blood‐Cell (RBC) Lipids and Components for Engineering Extracellular Vesicles

Advanced Healthcare Materials, EarlyView.
Engineered red blood cell‐derived extracellular vesicles (eRBCEVs) are synthesized via controlled microfluidic assembly from native RBC lipids, enabling tunable encapsulation of proteins, nucleic acids, nanoparticles, and viral vectors. The platform demonstrates reproducible nanoscale architecture, preserved membrane composition, and functional cargo ...
Chiranth K. Nagaraj, Xilal Y. Rima, Kim T. Nguyen, Courtney Culkins, Nana Boateng, Jacob Doon‐Ralls, Alejandro Bresolin, Xin Huang, Hong Li, Vahedi Amid, Ajeet Pal Singh, Dharti Shantaram, Anastasiia Amari, Mangesh D. Hade, Nicholas R. Merriam, Zachary D. Schultz, Scott Q. Harper, Nizar Y. Saad, Setty M. Magaña, Willa A. Hsueh, Rachel E. Kopec, Blaise R. Kimmel, Andre F. Palmer, Eduardo Reátegui   +23 more
wiley   +1 more source

Spacecraft formation flying using bifurcating potential fields [PDF]

, 2008
The distributed control of spacecraft flying in formation has been shown to have advantages over conventional single spacecraft systems. These include scalability, flexibility and robustness to failures.
Bennet, Derek, Bennet, Derek J., McInnes, Colin R., McInnes, C.R.   +3 more
core  

Fuel-Optimal In-Track Satellite Formation Trajectory with J₂ Perturbation Using Pontryagin Neural Networks

Aerospace
Satellite formation flying faces significant challenges in maintaining its desired configurations due to various orbital perturbations, particularly in low-Earth-orbit environments.
Morgan Choi, Seonho Lee
doaj   +1 more source

Mimetic Core‐Sheath Silk Sutures with Superior‐Strength for Pain Management, Anti‐Infection and Wound Healing

Advanced Healthcare Materials, EarlyView.
ABSTRACT Sutures are crucial for tissue approximation and wound healing. Besides their strength limits requirement, they often fail to effectively address complications like infection and pain. Inspired by natural silk's “core‐sheath” structure, our suture features a wet‐spun core of n zinc‐fortified silk fibroin fibers (RSF‐Zn2+) after drawing with ...
Yi Peng, Kai Ma, Xiaoxiao Li, Xiaozhuo Wu, Yuezhou Zhang, Ying Luo, Chenxing Zhang, Wen Zhong, Chunjing Yu, Lin Lu, Malcolm Xing, Guozhong Lyu   +11 more
wiley   +1 more source

TanDEM-X Scientific Results and Future Formation Flying SAR Missions [PDF]

, 2011
TanDEM-X (TerraSAR-X add-on for Digital Elevation Measurements) is an innovative spaceborne radar interferometer mission that was launched on June 21, 2010. This paper gives an overview of scientific experiments that have been conducted during the TanDEM-
Lopez Dekker, Paco, De Zan, Francesco, Hajnsek, Irena, Rodriguez Cassola, Marc, Zink, Manfred, Moreira, Alberto, Prats, Pau, Baumgartner, Stefan, Papathanassiou, Konstantinos, Krieger, Gerhard   +9 more
core