Zobrazeno 1 - 10
of 26
pro vyhledávání: '"P S Spoor"'
Autor:
F. Abdullah, J. Myers, D. Basu, G. Tintinger, V. Ueckermann, M. Mathebula, R. Ramlall, S. Spoor, T. de Villiers, Z. Van der Walt, J. Cloete, P. Soma-Pillay, P. Rheeder, F. Paruk, A. Engelbrecht, V. Lalloo, M. Myburg, J. Kistan, W. van Hougenhouck-Tulleken, M.T. Boswell, G. Gray, R. Welch, L. Blumberg, W. Jassat
Publikováno v:
International Journal of Infectious Diseases, Vol 116, Iss , Pp 38-42 (2022)
ABSTRACT: INTRODUCTION: The coronavirus disease 2019 (COVID-19) first reported in Wuhan, China in December 2019 is a global pandemic that is threatening the health and wellbeing of people worldwide. To date there have been more than 274 million repor
Externí odkaz:
https://doaj.org/article/8e1bebc5712e4887acff8e7f56ec33eb
Publikováno v:
Cryogenics. 88:1-9
Some Stirling-type pulse tube cryocoolers (PTCs) exhibit sensitivity to gravitational orientation and often exhibit significant cooling performance losses unless situated with the cold end pointing downward. Prior investigations have indicated that s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5c3171364b8cca8f9ce7a219252fffc8
https://doi.org/10.1016/j.cryogenics.2017.09.003
https://doi.org/10.1016/j.cryogenics.2017.09.003
Publikováno v:
IOP Conference Series: Materials Science and Engineering. 278:012172
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a73aba55f97cd2d765d77884b57cdfa
https://doi.org/10.1088/1757-899x/278/1/012172
https://doi.org/10.1088/1757-899x/278/1/012172
Publikováno v:
IOP Conference Series: Materials Science and Engineering. 278:012140
Minor geometric features and imperfections are commonly introduced into the basic design of multi-component systems to simplify or reduce the manufacturing expense. In this work, the cooling performance of a Stirling type cryocooler was tested in dif
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a712cf4c82bc76fa94e59aecedfc578d
https://doi.org/10.1088/1757-899x/278/1/012140
https://doi.org/10.1088/1757-899x/278/1/012140
Autor:
P. S. Spoor
Publikováno v:
AIP Conference Proceedings.
A large acoustic-Stirling (‘pulse tube’) coldfinger designed for approximately 1000 W cooling power at 80 K has shown a distinct decline in efficiency as input power is increased, especially at lower temperatures. Anomalies in the temperature pro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6697dfafc8821c7ec730669f072986da
https://doi.org/10.1063/1.4860871
https://doi.org/10.1063/1.4860871
Publikováno v:
The Journal of the Acoustical Society of America. 99:2593-2603
At a previous meeting (June 1995) a report was given on anomalous behavior of the Rayleigh–Ritz method for calculating the normal mode frequencies of elastic solids (the method that forms the basis for most resonant ultrasound work), when those sol
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2093eddf975e617002a4d40c932d0351
https://doi.org/10.1121/1.415272
https://doi.org/10.1121/1.415272
Publikováno v:
Physical Review Letters. 75:3462-3465
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8948f29c6798ac5ffc2488ab0839d81c
https://doi.org/10.1103/physrevlett.75.3462
https://doi.org/10.1103/physrevlett.75.3462
Publikováno v:
AIP Conference Proceedings.
Large (>100 W cooling capacity at 80 K) ‘pulse‐tube’ coolers are ideal candidates for emerging applications such as HTS transmission lines, transformers, and motor windings, meso‐scale oxygen liquefaction on‐demand, cryopumping, and cryogen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b86aec6177bcc2d0fa30d3ee63401580
https://doi.org/10.1063/1.3422425
https://doi.org/10.1063/1.3422425
Publikováno v:
Journal of Low Temperature Physics. 89:689-692
Investigations of many quantum and solid-state systems of interest require measurements on samples that are either very fragile, as in the aerogel- 4 He system, very small, such as samples of high-Tc materials, or both small and fragile, such as a si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9913a1eb5f916fd34f747698cf36021a
https://doi.org/10.1007/bf00694118
https://doi.org/10.1007/bf00694118
Autor:
P S Spoor
Publikováno v:
IOP Conference Series: Materials Science and Engineering. 101:012061
An oxygen liquefier using a large 'pulse-tube' or acoustic-Stirling cryocooler is described, which has a liquefaction rate in excess of 60 gallons per day (227 liters per day) as measured by the increase in weight of a storage dewar, from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e465b4c66ce2d9e69b4e548a4837da39
https://doi.org/10.1088/1757-899x/101/1/012061
https://doi.org/10.1088/1757-899x/101/1/012061