Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Alec T. Stevenson"'
Autor:
Thomas G. Smith, Ross D. Pollock, Joseph K. Britton, Nicholas D. C. Green, Peter D. Hodkinson, Stuart J. Mitchell, Alec T. Stevenson
Publikováno v:
Aerospace Medicine and Human Performance. 93:830-839
BACKGROUND: High-G acceleration experienced during launch and re-entry of suborbital spaceflights may present challenges for older or medically susceptible participants. A detailed understanding of the associated physiological responses would support
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe2a0959295b7b9f8aea188b75333115
https://doi.org/10.3357/amhp.6153.2022
https://doi.org/10.3357/amhp.6153.2022
Publikováno v:
Aerospace medicine and human performance. 92(10)
BACKGROUND: A growing number of symptom reports suggestive of acceleration atelectasis in fast jet aircrew have raised the question as to whether traditional guidelines on inspired gas composition remain valid. The aim of this study was to assess the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::55cc48a673251b13c6426550a82050bb
https://pubmed.ncbi.nlm.nih.gov/34641998
https://pubmed.ncbi.nlm.nih.gov/34641998
Autor:
John Couper, Peter A. Robbins, Nadia Abid, Luis Estrada-Petrocelli, Graham Richmond, Henry D. Tank, Mitchell J. Segal, Snapper Magor-Elliott, Caroline J. Jolley, Thomas G. Smith, Tobias Menden, Ross D. Pollock, Grant A. D. Ritchie, Alec T. Stevenson, Steffen Leonhardt, Peter D. Hodkinson, Gerrard F. Rafferty
Publikováno v:
Aerospace medicine and human performance. 92(8)
BACKGROUND: Members of the public will soon be taking commercial suborbital spaceflights with significant Gx (chest-to-back) acceleration potentially reaching up to 6 Gx. Pulmonary physiology is gravity-dependent and is likely to be affected, which m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c5c40109641dd090714995fa56e9e6e5
https://pubmed.ncbi.nlm.nih.gov/34642013
https://pubmed.ncbi.nlm.nih.gov/34642013
Autor:
Nicholas D C Green, Dianne Newham, Ellen Slungaard, Stephen D. R. Harridge, Alec T. Stevenson, Ross D. Pollock
Publikováno v:
AEROSPACE MEDICINE AND HUMAN PERFORMANCE
INTRODUCTION: Physical conditioning may improve aircrew performance during exposure to high +Gz acceleration, although few studies have directly assessed this. The present study investigated the effects of a 12-wk Aircrew Conditioning Programme (ACP)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f40d79a2cad024fde8fa0a45d51d40c
https://doi.org/10.3357/amhp.5318.2019
https://doi.org/10.3357/amhp.5318.2019
Publikováno v:
Experimental physiologyREFERENCES. 106(1)
New findings What is the central question of the study? The aim was to determine the effects of duration of acceleration in the cranial-caudal direction (+Gz) on acceleration atelectasis and identify measurement techniques that can be used to assess
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e4e957c4d982dccb427b170f8dd434fc
https://pubmed.ncbi.nlm.nih.gov/32281162
https://pubmed.ncbi.nlm.nih.gov/32281162
Autor:
Ilias Tachtsidis, Gemma Bale, Frédéric Lange, Ross D. Pollock, Pardis Kaynezhad, Alec T. Stevenson
Publikováno v:
Advances in Experimental Medicine and Biology ISBN: 9783030344597
We used a miniature broadband NIRS system to monitor concentration changes in brain oxygenation (oxy- and deoxy- haemoglobin [HbO2], [HHb]) and oxidised cytochrome-c-oxidase ([oxCCO]) during a high +Gz acceleration, induced by a human centrifuge, on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::92a834328b9e3fe7a4077ba39a22dfd9
https://doi.org/10.1007/978-3-030-34461-0_43
https://doi.org/10.1007/978-3-030-34461-0_43
Autor:
Gema B Alcaín, Tobias Menden, Peter D. Hodkinson, Steffen Leonhardt, Henry D. Tank, Ross D. Pollock, Alec T. Stevenson, Marian Walter, Thomas G. Smith, Caroline J. Jolley
Publikováno v:
Physiological Measurement. 42:094001
Objective. During launch and atmospheric re-entry in suborbital space flights, astronauts are exposed to high G-acceleration. These acceleration levels influence gas exchange inside the lung and can potentially lead to hypoxaemia. The distribution of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::28c5511f2f870cae67a1a23033d1a622
https://doi.org/10.1088/1361-6579/ac1c63
https://doi.org/10.1088/1361-6579/ac1c63
Autor:
Katherine Phillips, Jessica A. Storey, Desmond M. Connolly, Ross D. Pollock, Rachel Firth, Alec T. Stevenson, Nicholas D C Green
Publikováno v:
Pollock, R D, Firth, R, Storey, J, Phillips, K, Connolly, D, Green, N D C & Stevenson, A T 2019, ' Hemodynamic responses and G Protection Afforded by Three Different Anti-G Systems ', Aerospace medicine and human performance, vol. 90, no. 11, pp. 925-933 . https://doi.org/10.3357/AMHP.4927.2019
BACKGROUND: UK Royal Air Force fast jet aircrew use three different anti-G systems, however, little objective comparison of the G protection they provide exists. The G-protection afforded by each system and associated hemodynamic responses were inves
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::258f46cee9817ee6a3f7099c5f835d1d
https://pubmed.ncbi.nlm.nih.gov/31666153
https://pubmed.ncbi.nlm.nih.gov/31666153
Autor:
Michael Bagshaw, Jonathan P. R. Scott, Scott T Chiesa, Stephen D. R. Harridge, Debbie Sin, Alec T. Stevenson, Gabriella Coates
Publikováno v:
Aviation, Space, and Environmental Medicine. 85:536-542
BACKGROUND Cardiovascular reflexes that regulate blood pressure (BP) adapt during repeated exposure to +Gz acceleration separated by short (< 20 s) breaks, but whether this effect is preserved with longer intervals remains unknown. METHODS There were
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eb77c65b4fb5bb920f8ac4be35167b02
https://doi.org/10.3357/asem.3816.2014
https://doi.org/10.3357/asem.3816.2014
Publikováno v:
Aviation, Space, and Environmental Medicine. 85:426-432
Background Fast jet aircrew are heavily reliant on anti-G trousers (AGT) and failure of the garment or its pressure supply would expose them to high levels of +Gz acceleration without protection. A previous study demonstrated the severity of this eve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c7da29f8137d53ddf670fa6fc16a865f
https://doi.org/10.3357/asem.3773.2014
https://doi.org/10.3357/asem.3773.2014