scholarly journals Patched Local Lunar Gravity Solutions using GRAIL Data

2021 ◽  
Author(s):  
Sander Goossens ◽  
Álvaro Fernández Mora ◽  
Eduard Heijkoop ◽  
Terence J. Sabaka
Keyword(s):  
Lunar Gravity

scholarly journals Additive Manufacturing Under Lunar Gravity and Microgravity

2021 ◽  
Vol 33 (2) ◽  
Author(s):  
B. Reitz ◽  
C. Lotz ◽  
N. Gerdes ◽  
S. Linke ◽  
E. Olsen ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Spare Parts ◽  
Manufacturing Processes ◽  
Complex Structures ◽  
Lunar Gravity ◽  
Limited Extent ◽  
Test Environment ◽  
Manufacturing Tests ◽  
Laser Experiments ◽  
Materials Used

AbstractMankind is setting to colonize space, for which the manufacturing of habitats, tools, spare parts and other infrastructure is required. Commercial manufacturing processes are already well engineered under standard conditions on Earth, which means under Earth’s gravity and atmosphere. Based on the literature review, additive manufacturing under lunar and other space gravitational conditions have only been researched to a very limited extent. Especially, additive manufacturing offers many advantages, as it can produce complex structures while saving resources. The materials used do not have to be taken along on the mission, they can even be mined and processed on-site. The Einstein-Elevator offers a unique test environment for experiments under different gravitational conditions. Laser experiments on selectively melting regolith simulant are successfully conducted under lunar gravity and microgravity. The created samples are characterized in terms of their geometry, mass and porosity. These experiments are the first additive manufacturing tests under lunar gravity worldwide.

Trajectory Design in the Sun-Earth-Moon System Using Lunar Gravity Assists

1998 ◽  
Vol 35 (2) ◽  
pp. 191-198 ◽  
Author(s):  
Roby S. Wilson ◽  
Kathleen C. Howell
Keyword(s):  
Trajectory Design ◽  
The Sun ◽  
Lunar Gravity ◽  
Moon System ◽  
Gravity Assists

A method to determine regional lunar gravity fields from earth-based satellite tracking data

2005 ◽  
Vol 53 (13) ◽  
pp. 1331-1340 ◽  
Author(s):  
S. Goossens ◽  
P.N.A.M. Visser ◽  
B.A.C. Ambrosius
Keyword(s):  
Satellite Tracking ◽  
Tracking Data ◽  
Lunar Gravity ◽  
Gravity Fields

Work in Reduced-Gravity Environments

1969 ◽  
Vol 11 (5) ◽  
pp. 433-439 ◽  
Author(s):  
E. C. Wortz
Keyword(s):  
Human Performance ◽  
Research Data ◽  
Lunar Gravity ◽  
Reduced Gravity

Research data on human performance in weightless and lunar-gravity environment are considered on a single continuum of reduced traction. Apparent contradictions in the effects of reduced gravity on tasks requiring the use of the upper torso and those requiring locomotion are resolved. It is concluded that reduced traction systematically reduces the efficiency of work in all reduced-gravity conditions.

Cardiopulmonary Resuscitation in Hypogravity Simulation

2021 ◽  
Vol 92 (2) ◽  
pp. 106-112
Author(s):  
Sindujen Sriharan ◽  
Gemma Kay ◽  
Jimmy C.Y. Lee ◽  
Ross D. Pollock ◽  
Thais Russomano
Keyword(s):  
Cardiopulmonary Resuscitation ◽  
Lunar Gravity ◽  
The Moon ◽  
Chest Compressions ◽  
Resuscitation Guidelines ◽  
Cpr Quality ◽  
Gender Space ◽  
External Chest Compressions ◽  
Mixed Gender ◽  
Interplanetary Travel

BACKGROUND: Limited research exists into extraterrestrial CPR, despite the drive for interplanetary travel. This study investigated whether the terrestrial CPR method can provide quality external chest compressions (ECCs) in line with the 2015 UK resuscitation guidelines during ground-based hypogravity simulation. It also explored whether gender, weight, and fatigue influence CPR quality.METHODS: There were 21 subjects who performed continuous ECCs for 5 min during ground-based hypogravity simulations of Mars (0.38 G) and the Moon (0.16 G), with Earths gravity (1 G) as the control. Subjects were unloaded using a body suspension device (BSD). ECC depth and rate, heart rate (HR), ventilation (VE), oxygen uptake (Vo2), and Borg scores were measured.RESULTS: ECC depth was lower in 0.38 G (42.9 9 mm) and 0.16 G (40.8 9 mm) compared to 1 G and did not meet current resuscitation guidelines. ECC rate was adequate in all gravity conditions. There were no differences in ECC depth and rate when comparing gender or weight. ECC depth trend showed a decrease by min 5 in 0.38 G and by min 2 in 0.16 G. Increases in HR, VE, and Vo2 were observed from CPR min 1 to min 5.DISCUSSION: The terrestrial method of CPR provides a consistent ECC rate but does not provide adequate ECC depths in simulated hypogravities. The results suggest that a mixed-gender space crew of varying bodyweights may not influence ECC quality. Extraterrestrial-specific CPR guidelines are warranted. With a move to increasing ECC rate, permitting lower ECC depths and substituting rescuers after 1 min in lunar gravity and 4 min in Martian gravity is recommended.Sriharan S, Kay G, Lee JCY, Pollock RD, Russomano T. Cardiopulmonary resuscitation in hypogravity simulation. Aerosp Med Hum Perform. 2021; 92(2):106112.

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