Pressure Suit Requirements for Moon and Mars EVA's
In this paper, we examine the influence of pressure suit and backpack designs on astronaut productivity and on the frequency with which EVA's can be conducted during lunar base operations...
Medical Care on the Moon
Eventually, people will return to the Moon to stay for prolonged periods of time. When they do, they will be exposed to a wide range of threats to their health including, decompression...
Regenerative Life Support Technology Challenges for the Space Exploration Initiative
Regenerative life support systems have been identified as one of the critical enabling technologies for future human exploration of space. This discipline encompasses processes and subsystems...
An Integrated Human/Plant Metabolic Mass Balance Model
The design and development of Controlled Ecological Life Support Systems (CELSS) in support of future Lunar and Martian bases requires analytical models for evaluating human and biological...
Space Habitat Environmental Health: A Systems Issue
Internal Pressure in a Lunar Inflatable Structure
Design and construction of a structure on the Moon requires addressing a host of issues not encountered on Earth. A critical design factor is the internal atmospheric pressure necessary...
Minneapolis/St. Paul International (MSP) Part 150 Implementation Design Overview
In February 1991, Matropolitan Airports Commission (MAC) selected the consulting team of Aviation Planning Inc., Wyle LAboratories Inc. and the Center for Energy and the Urban Environment...
The Dialogue of Players on the Development Stage
To examine the factors which affect the quality of communications during the traffic impact study process, an opinion survey was administered to individuals representing three groups of...
Site Traffic Impact Analysis Process: The Developer's Perspective
Site traffic impact analyses are often conducted for private developers by traffic engineering consultants to be reviewed by the local engineering or planning departments of Cities and...
Geosynthetic Strength—Ultimate and Serviceability Limit State Design
Serviceability Analysis of Wood Beams with Creep
The effect of creep deformations on the serviceability reliability of single, dimension lumber wood beams is examined. A viscoelastic stress-strain relationship is used to model the time-dependent...
A Stochastic Model for Crack Initiation and Fatigue Life
A stochastic theory of high cycle fatigue life is based on a combination of the theory of diffusion in the presence of a stress field with activated state theory. The result is expressed...
Fatigue Life Variability and Reliability Analysis of a Wind Turbine Blade
Wind turbines must withstand harsh environments that induce many stress cycles into their components. A numerical analysis package is used to illustrate the sobering variability in predicted...
Fatigue Strength of Welded Joints Under Broadband Loadings
Twelve welded high strength steel cruciform specimens were tested under stochastic loadings to determine the influence on fatigue life of the bandwidth of the loading process. Constant...
Structural System Design under Uncertainty Via Pareto Optimization
Structural systems are generally designed under safety, serviceability and economy requirements. The single objective optimal design problem of both deterministic and nondeterministic...
Technology Transfer for Projects in South America
Engineering services were provided for three projects in South America. One project was located in the Pampa Region of Argentina and two others in northern Brazil. The projects were: 1)...
Results from a Long-Term Winter Cloud Seeding Program in Utah
An operational wintertime cloud seeding program has been conducted in portions of Utah since 1974. North American Weather Consultants (NAWC) has conducted this program for a consortium...
Container Terminal Gates Flexible Design for a Dynamic Environment
A paper entitled 'Container Terminal Gate Efficiency Hinges on Flexibility' was presented at ASCE Ports '89 by Larry Nye of Cash & Associates Engineers. The paper summarized the...
Traffic Impact Studies—Current Practices from Cities' Perspective
The results of a nationwide survey conducted among a sample of city traffic engineers are described. Information and opinions about current practices in traffic impact studies were obtained....
LIAC: A Closed Ecosystem Research Facility
A preliminary design for a closed research facility capable of supporting multispecies and ecosystem level experiments is presented. This project will support NASA's Controlled Ecological...
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