Results 231 to 240 of about 2,545,324 (298)

Troctolite 76535: A sample of the Moon's South Pole-Aitken basin?

, 2020
Lunar samples returned by the Apollo program have provided insights into numerous solar system processes. However, no samples were returned from the lunar farside, where one of the Moon's most geologically important features resides: the 2500-km-diameter
I. Garrick‐Bethell, K. Miljković, H. Hiesinger, C. H. Bogert, Matthieu Laneuville, D. Shuster, D. Korycansky   +6 more
semanticscholar   +1 more source

Analytical Analysis of Cogging Torque in Permanent Magnet Machines With Unequal North and South Poles, With Particular Reference to Consequent Pole Machines

IEEE transactions on energy conversion, 2023
In this paper, a general analytical model is developed to analyze the cogging torque accounting for unequal north and south poles as well as pole shifting, which can be applied to consequent pole permanent magnet (CPPM) machines and other rotor PM ...
J. Qi, Z. Zhu, Luocheng Yan, G. Jewell, C. Gan, Yuan Ren, S. Brockway, C. Hilton   +7 more
semanticscholar   +1 more source

South Pole Telescope optics

Applied Optics, 2008
The South Pole Telescope is a 10 m diameter, wide-field, offset Gregorian telescope with a 966-pixel, millimeter-wave, bolometer array receiver. The telescope has an unusual optical system with a cold stop around the secondary. The design emphasizes low scattering and low background loading.
S, Padin, Z, Staniszewski, R, Keisler, M, Joy, A A, Stark, P A R, Ade, K A, Aird, B A, Benson, L E, Bleem, J E, Carlstrom, C L, Chang, T M, Crawford, A T, Crites, M A, Dobbs, N W, Halverson, S, Heimsath, R E, Hills, W L, Holzapfel, C, Lawrie, A T, Lee, E M, Leitch, J, Leong, W, Lu, M, Lueker, J J, McMahon, S S, Meyer, J J, Mohr, T E, Montroy, T, Plagge, C, Pryke, J E, Ruhl, K K, Schaffer, E, Shirokoff, H G, Spieler, J D, Vieira   +34 more
openaire   +2 more sources

Lunar south pole boulders and boulder tracks: Implications for crew and rover traverses

, 2020
Knowledge about the geomechanical properties of the southern circumpolar regolith and its spatial variability is essential for effective and diligent planning of future crew and rover traverses.
V. T. Bickel, D. Kring
semanticscholar   +1 more source

South Pole expedition

Photovoltaics in Cold Climates, 2019
openaire   +2 more sources

Deep Structure of the Lunar South Pole‐Aitken Basin

Geophysical Research Letters, 2019
The South Pole‐Aitken basin is a gigantic impact structure on the far side of the Moon, with an inner rim extending approximately 2,000 km in the long axis dimension. The structure and history of this basin are illuminated by gravity and topography data,
P. James, David E. Smith, P. Byrne, J. Kendall, H. Melosh, M. Zuber   +5 more
semanticscholar   +1 more source

North pole, south pole, wormhole

New Scientist, 2015
In earlier work, Alvaro Sanchez at the Autonomous University of Barcelona, Spain, and his colleagues transferred a magnetic field across space with a superconducting hose. The team nested the hose inside a sphere of superconducting strips to deflect incoming fields.
openaire   +1 more source

Gravity Increase at the South Pole

Science, 1967
Measurements made between December 1957 and January 1966 of the gravity difference between the McMurdo Sound pendulum station, which is on bedrock, and the South Pole station, which is on the Antarctic ice sheet, show a gravity increase at the South Pole of 0.11 milligals per year.
openaire   +2 more sources

The South Pole

2014
On 14 December 1911, Roald Amundsen (1872–1928) and his Norwegian team became the first humans to reach the South Pole, a month before their ill-fated British rivals under the leadership of Robert Falcon Scott. Reissued here is the 1912 English translation of Amundsen's two-volume account of how this extraordinary and perilous feat was achieved ...
openaire   +1 more source

Lunar compositional asymmetry explained by mantle overturn following the South Pole–Aitken impact

Nature Geoscience, 2022
Nan Zhang, M. Ding, Menghua Zhu, Huacheng Li, Haoyuan Li, Z. Yue   +5 more
semanticscholar   +1 more source