Results 51 to 60 of about 6,561 (302)

Inverse Identification of Energy‐Dependent Laser Absorptivity in NiTi Laser Powder‐Bed Fusion via Calibrated Melt Pool Simulation

Advanced Engineering Materials, EarlyView.
A combined experimental–computational framework identifies energy‐dependent laser absorptivity for NiTi in laser powder‐bed fusion, applicable to conduction and transition modes. Single‐track experiments and thermofluid smoothed particle hydrodynamics simulations are coupled through inverse analysis of melt pool geometry.
Mohamadreza Afrasiabi, Hadi Moutablaleh, Ignatius A. Setiawan, Mehrshad Mehrpouya   +3 more
wiley   +1 more source

Implementation of Acyclic Matching in Aerospace Technology for Honeycomb-Designed Satellite Constellations

Mathematics
Operational satellites are critical to modern aerospace infrastructure, supporting essential services such as communication, navigation, and global surveillance.
Saffren Sundher, Angel Dharmakkan, Govindarajan Arunachalam, Vidhya Mohanakrishnan, Manigandan Sekar   +4 more
doaj   +1 more source

Positioning in the Arctic Region: State-of-the-Art and Future Perspectives

IEEE Access, 2021
The positioning systems’ high accuracy and reliability are crucial enablers for various future applications, including autonomous shipping worldwide. It is especially challenging for the Arctic region due to the lower number of visible satellites,
Anastasia Yastrebova, Marko Hoyhtya, Sandrine Boumard, Elena Simona Lohan, Aleksandr Ometov   +4 more
doaj   +1 more source

Composites of Shellac and Silver Nanowires as Flexible, Biobased, and Corrosion‐Resistant Transparent Conductive Electrodes

Advanced Functional Materials, EarlyView.
Shellac, a centuries‐old natural resin, is reimagined as a green material for flexible electronics. When combined with silver nanowires, shellac films deliver transparency, conductivity, and stability against humidity. These results position shellac as a sustainable alternative to synthetic polymers for transparent conductors in next‐generation ...
Rahaf Nafez Hussein, Tiago Carneiro Gomes, Eliza Ng, Simon Rondeau‐Gagné, Tricia Breen Carmichael   +4 more
wiley   +1 more source

Sustainability assessment of Low Earth Orbit satellite broadband mega-constellations

, 2023
The data provided here are necessary for reproducing the results in the "Sustainability assessment of Low Earth Orbit satellite broadband mega-constellations ...
Dr Akhil Rao, Dr Andrew Wilson, Bonface Ogutu Osoro, Dr Edward Oughton   +3 more
core   +1 more source

LEO Satellite Constellation for Internet of Things

IEEE Access, 2017
Internet of Things (IoT) is one of the evolutionary directions of the Internet. This paper focuses on the low earth orbit (LEO) satellite constellation-based IoT services for their irreplaceable functions. In many cases, IoT devices are distributed in remote areas (e.g., desert, ocean, and forest) in some special applications, they are placed in some ...
Zhicheng Qu, Gengxin Zhang, Haotong Cao, Jidong Xie   +3 more
openaire   +2 more sources

Counterion Dependent Side‐Chain Relaxation Stiffens a Chemically Doped Thienothiophene Copolymer

Advanced Functional Materials, EarlyView.
Oxidation of a thienothiophene copolymer, p(g3TT‐T2), via different doping strategies and dopant molecules resulted in materials with similar oxidation levels and a high electrical conductivity of ≈100 S cm−1. However, mechanical properties varied significantly, with sub‐glass transition temperatures and elastic moduli spanning from –44°C to –3°C and ...
Mariavittoria Craighero, Meghna Jha, Elsa Veronica Flores‐Vela, Joost Kimpel, Andreas Schaefer, Jiali Guo, Jesika Asatryan, Alberto Peinador Veiga, Shuichi Haraguchi, Per‐Anders Carlsson, Jaime Martín, Mariano Campoy‐Quiles, Christian Müller   +12 more
wiley   +1 more source

Fuel Consumption and Collision Avoidance Strategy in Multi-static Orbit Formations

, 2011
This paper analysesthe fuel consumption of interferometric rader missions employing small satellite formations like, e.g., Cross-track pendulum, Cartwheel, CarPe, or Trinodal Pendulum.
H. Fiedler, E.F. Jochim, Fiedler, Hauke, G. Krieger, Krieger, Gerhard, Jochim, Fritz   +5 more
core   +1 more source

Algorithms for a Satellite Constellation scheduling Problem

2016 IEEE International Conference on Automation Science and Engineering (CASE), 2016
Remote sensing systems such as a constellation of satellites periodically observe regions on the surface of the earth to collect visual imagery and other sensory data that is both spatial and temporal. Efficiently scheduling sensing activities on a constellation of satellites is a natural problem that arises while managing these systems. Given a set of
Kaarthik Sundar, Jianglei Qin, Sivakumar Rathinam, Lewis Ntaimo, Swaroop Darbha, Christopher G. Valicka   +5 more
openaire   +2 more sources

Ferroelectricity in Antiferromagnetic Wurtzite Nitrides

Advanced Functional Materials, EarlyView.
We establish MnSiN2${\rm MnSiN}_2$ and MnGeN2${\rm MnGeN}_2$ as aristotypes of a new multiferroic wurtzite family that simultaneously exhibits ferroelectricity and antiferromagnetism with altermagnetic spin splitting. By strategically substituting alkaline‐earth metals, we predict new materials with coexisting switchable polarization, spin texture, and
Steven M. Baksa, Lin‐Ding Yuan, Stephen D. Wilson, James M. Rondinelli   +3 more
wiley   +1 more source