Results 161 to 170 of about 5,655 (211)

Medical Aspects of Extravehicular Activity

2019
Extravehicular activity (EVA), commonly referred to as spacewalks, is an exciting and necessary capability of human space flight. EVA is defined as work performed outside of the pressurized habitable environment of the space vehicle. EVA requires a self-contained living environment provided by a complex pressurized spacesuit.
Joseph Dervay, Robert W. Sanders, Moriah S. Thompson, Tracy Jo Snow   +3 more
openaire   +1 more source

Evaluation of Cardiac Rhythm Disturbances During Extravehicular Activity

The American Journal of Cardiology, 1997
This study represents the first systematic evaluation of dysrhythmias before, during, and after spaceflight including extravehicular activity (EVA). The data, based on 7 Shuttle crew members, revealed a nonsignificant decrease in ventricular and supraventricular ectopy during EVA, suggesting that the incidence of dysrhythmias is no greater during EVA ...
A C, Rossum, M L, Wood, S L, Bishop, H, Deblock, J B, Charles   +4 more
openaire   +2 more sources

A new preoxygenation procedure for extravehicular activity (EVA)

Acta Astronautica, 1998
A 10.2 psi staged-decompression schedule or a 4-hour preoxygenation at 14.7 psi is required prior to extravehicular activity (EVA) to reduce decompression sickness (DCS) risk. Results of recent research at the Air Force Research Laboratory (AFRL) showed that a 1-hour resting preoxygenation followed by a 4-hour, 4.3 psi exposure resulted in 77% DCS risk
J T, Webb, A A, Pilmanis
openaire   +2 more sources

Medical support of cosmonauts’ extravehicular activity

Herald of the Russian Academy of Sciences, 2015
March 18, 2015, was the 50th anniversary of the world’s first spacewalk. The man who performed this spacewalk was the Soviet cosmonaut A.A. Leonov, a participant in the Voskhod 2 space mission. In June of the same year, the American astronaut E. White, the pilot of the Gemini 4 vehicle, accomplished a spacewalk.
Anatolii Ivanovich Grigor’ev, Yurii Yur’evich Osipov, Georgii Ivanovich Samarin   +2 more
openaire   +1 more source

Human Systems Monitoring during Extravehicular Activity

SAE Technical Paper Series, 2006
<div class="htmlview paragraph">Introduction: With NASA's Vision for Space Exploration human explorers are expected to undertake lengthy missions beyond the limits of evacuation or earth based medical response. Such exploration missions will consequently require capabilities for semi-autonomous medical practice. The monitoring system used in this
Azhar Rafiq, Xiaoming Zhao, Cosmin Boanca, Esther Hughes, Ronald Merrell   +4 more
openaire   +1 more source

Tactile Sensing Gloves for Extravehicular Activity

SAE Technical Paper Series, 2009
<div class="htmlview paragraph">Gloves are a critical element of the space suit used for extra-vehicular activity (EVA) since most work is done with the hands. The stiffness of the pressurized space suit limits the dexterity and flexibility of the astronauts' fingers, considerably depriving the fingertips of tactile sense of objects external to ...
Ji Son, Richard Fan, Christopher Wottawa, Warren Grundfest, Erik Dutson, Martin Culjat   +5 more
openaire   +1 more source

Modeling the Extravehicular Mobility Unit (EMU) Space Suit: Physiological Implications for Extravehicular Activity (EVA)

SAE Technical Paper Series, 2000
<div class="section abstract"><div class="htmlview paragraph">Extravehicular activity (EVA) is investigated through experiments testing an actual extravehicular mobility unit (EMU) performing several EVA tasks in the laboratory, and a dynamic model of the EMU space suit is developed.
D. J. Newman, P. B. Schmidt, D. B. Rahn
openaire   +1 more source

Extravehicular Activity: Performing EVA Safely

2006
Abstract In his historic first extravehicular activity (EVA), Alexi Leonov faced almost every medical risk an EVA can present. Leonov left his Voskhod 2 capsule in March 1965 to begin the first spacewalk ever performed. All went well until he tried to get back into the capsule.
openaire   +1 more source

Cooling Effects of Wearer-Controlled Vaporization for Extravehicular Activity

Aerospace Medicine and Human Performance, 2017
INTRODUCTION: The extravehicular activity suit currently used by the United States in space includes a liquid cooling and ventilation garment (LCVG) that controls thermal conditions. Previously, we demonstrated that self-perspiration for evaporative cooling (SPEC) garment effectively lowers skin temperature without raising humidity in the garment ...
Kunihiko, Tanaka, Daiki, Nagao, Kosuke, Okada, Koji, Nakamura   +3 more
openaire   +2 more sources

Automated tether management system for extravehicular activities

Journal of Field Robotics, 2007
AbstractSafe extravehicular activity (EVA) requires astronauts to employ tethers to ensure proximity to their spacecraft. This research strives to improve EVA efficiency by allowing crew members to remotely release and retract their safety tether from extended distances using a tether management system consisting of a remotely releasable robotic ...
Mark A. Minor, Christopher R. Hirschi
openaire   +1 more source