Results 21 to 30 of about 1,915,147 (242)

Novel pole-sitter mission concepts for continuous polar remote sensing [PDF]

, 2012
The pole-sitter concept is a solution to the poor temporal resolution of polar observations from highly inclined, low Earth orbits and the poor high latitude coverage from geostationary orbit.
Jeannette Heiligers, Colin R. McInnes, Heiligers, Jeannette, McInnes, Colin, Ceriotti, Matteo, Ceriotti, M., Heiligers, J., Matteo Ceriotti, McInnes, C.R.   +8 more
core   +4 more sources

Mission analysis and systems design of a near-term and far-term pole-sitter mission [PDF]

, 2014
This paper provides a detailed mission analysis and systems design of a near-term and far-term polesitter mission. The pole-sitter concept was previously introduced as a solution to the poor temporal resolution of polar observations from highly inclined,
Biggs, James, Jeannette Heiligers, BIGGS, JAMES DOUGLAS, Heiligers, Jeannette, McInnes, Colin, Ceriotti, Matteo, Heiligers, J., Ceriotti, M., Mcinnes, Colin R., Biggs, J.D., Colin R. Mcinnes, Matteo Ceriotti, James D. Biggs, McInnes, C.R.   +13 more
core   +4 more sources

ANALISIS TEKSTUR ZIRCALOY-4 MENGGUNAKAN METODE WILLIAM–IMHOF–MATTHIES-VINEL (WIMV)

Urania, 2015
ANALISIS TEKSTUR ZIRCALOY-4 MENGGUNAKAN METODE WILLIAM–IMHOF–MATTHIES-VINEL (WIMV). Zircaloy-4 sebagai kelongsong bahan bakar nuklir telah banyak diteliti secara makroskopik maupun secara mikroskopik, namun penelitian menggunakan teknik difraksi neutron,
Tri Hardi Priyanto, Mei Juan Li
doaj   +1 more source

Design of optimal Earth pole-sitter transfers using low thrust propulsion [PDF]

, 2011
Recent studies have shown the feasibility of an Earth pole-sitter mission using low-thrust propulsion. This mission concept involves a spacecraft following the Earth's polar axis to have a continuous, hemispherical view of one of the Earth's poles.
Biggs, James, Biggs, J.D., BIGGS, JAMES DOUGLAS, Heiligers, Jeannette, McInnes, Colin, Ceriotti, Matteo, Heiligers, J., Ceriotti, M., Mcinnes, Colin R., McInnes, C.R.   +9 more
core   +4 more sources

Effects of the Al Content on the Evolution of Quadruple Basal Textures in Mg-xAl-1Zn-0.1Mn-0.1Ca-0.2Y Alloy Sheets Processed via Cold Rolling and Annealing

Metals, 2022
The effects of the Al content on the texture evolution of Mg-xAl-1Zn-0.1Ca-0.2Y alloy sheets fabricated via hot rolling, cold rolling, and subsequent annealing were systematically investigated.
Lichao Li, Yohan Go, Joung Sik Suh, Byeong-Chan Suh, Young Min Kim   +4 more
doaj   +1 more source

Crystallographic Texture Analysis of As-Built and Heat-Treated Ti6Al4V (ELI) Produced by Direct Metal Laser Sintering

Crystals, 2020
This paper reports on an investigation of crystallographic texture of as-built and heat-treated Ti6Al4V (ELI) produced by direct metal laser sintering (DMLS). The texture analyses were conducted using electron backscatter diffraction (EBSD).
Amos Muiruri, Maina Maringa, Willie du Preez   +2 more
doaj   +1 more source

Mechanism of Secondary Deformation of Extruded AZ31 Magnesium Alloy by Viscoplastic Self-Consistent Model

Advances in Materials Science and Engineering, 2020
The viscoplastic self-consistent (VPSC) model is used to establish a combination of different deformation mechanisms. By using this model, axial tension and compression tests of extruded AZ31 magnesium alloy at room temperature are simulated.
Su Hui, Zhibing Chu, Huanzhu Wang, Yugui Li, Lifeng Ma, Chun Xue   +5 more
doaj   +1 more source

CMOS X‐band pole‐converging triple‐cascode LNA with low‐noise and wideband performance

IET Circuits, Devices and Systems, 2022
A pole‐converging X‐band low‐noise amplifier (LNA) using 130 nm CMOS technology is proposed. An on‐chip pole‐converging capacitor CPC is added between the gate and drain node of the common‐gate (CG) stage. The capacitor CPC combines with a noise‐reducing
Cheng Cao, Yubing Li, Zhe Wang, Zemeng Huang, Tao Tan, Deyang Chen, Xiuping Li   +6 more
doaj   +1 more source

Cardinal Reginald Pole: Questions of Self-Justification and of Faith

Royal Studies Journal, 2017
Cardinal Reginald Pole served as a papal legate for almost twenty years. He was a leading figure in the Catholic Reform movement, and a prominent political figure both in England and in Europe in his own right.
John Murphy
doaj   +1 more source

An Evolutionary Algorithm for the Texture Analysis of Cubic System Materials Derived by the Maximum Entropy Principle

Entropy, 2014
Based on the principle of maximum entropy method (MEM) for quantitative texture analysis, the differential evolution (DE) algorithm was effectively introduced.
Dapeng Wang, Dazhi Wang, Baolin Wu, Fu Wang, Zhide Liang   +4 more
doaj   +1 more source