Now Showing in San Diego
This article is a roundup of three major infrastructure projects in the San Diego area. Each of these projects will be features in the technical tours portion of the ASCE conference in...
Tracking a Serial Filter
The Humboldt Bay Municipal Water District in northern California conducted pilot testing of extreme/high-rate serial filtration (EHRSF) to see if the process could meet water treatment...
Removing Metals From Soil
Metals-contaminated soils have been among the most intractable hazardous-waste remediation problems. Conventional mitigation methods of capping, stabilization and landfilling all have...
Rest in Peace
Engineers working on a subway connection project in the nation's capital successfully employed chemical grouting techniques--some never tried before--to protect a historically...
Odor Control in Wastewater Treatment Plants
This manual should be of primary assistance to wastewater treatment plant (WWTP) operators and management, engineers, wastewater agency management personnel, laboratory staff, and collection...
Generic Data Acquisition System for Robotic Waste Characterization
This paper describes a generic data acquisition system for robotic characterization of DOE production facilities and waste sites. While the specific suite of characterization sensors on...
Automation Concepts for In-Situ Waste Containment
The isolation of chemical and radioactive contaminants from groundwater supplies is a topic of increasing concern and urgency. In-situ containment of hazardous wastes is preferable if...
Overview of Space Environmental Effects
The natural environment for low Earth orbit subjects satellites to various forms of damage, ranging from particulate impacts, ultraviolet light, atomic oxygen erosion and charged particle...
A Comparison of Propulsion Systems for Space Exploration
There are three promising propulsion systems that might be used for space missions: chemical, direct nuclear, and nuclear electric. Selecting the best system for a mission involves comparing...
Reduction, Reuse, and Recycling on a Future Lunar Base
The paper addresses the waste management problems on Earth as they relate to a future lunar base and suggests measures to prevent these problems from occurring in the base. Offensive action...
JSC-1: A New Lunar Soil Simulant
A new lunar soil simulant, JSC-1, has been developed and characterized under the auspices of the NASA Johnson Space Center. This simulant was produced in large quantities to satisfy the...
Mineral Liberation and Beneficiation of Lunar High-Ti Mare Basalt, 71055: Digital-Imaging Analyses
Knowledge of the abundance of various lunar minerals and the ability to effectively beneficiate thee minerals are important requirements for effective utilization of lunar resources. SEM/EMP...
Effects of Dust and Thermal Cycling on Telescope Mirror Performance
In this study, 1 cm ? 1 cm square optical-grade aluminized glass mirrors were measured for maximum light reflectance and then the loss of reflectance due to the presence of different specific...
Kinetic Interpretations of First Reactivity Experiments on Lunar Basalt Samples
For the first time, water/oxygen production from Apollo program lunar samples has been experimentally demonstrated. The experiments gave extremely encouraging results as all ilmenite was...
Lunar Oxygen Production in a Hydrogen Cold Plasma
This paper examines the concept of oxygen production from unbeneficiated lunar regolith using a non-equilibrium or 'cold' hydrogen plasma. An experimental investigation has indicated that...
Feasibility of Treating Synthetic Greywater by Culturing Waldmann's Dark Green Lettuce in a Hydroponic System
The objective of the research was to treat synthetic greywater in a hydroponic system culturing Waldmanns dark green lettuce (Lactuca Stavia L Var. Crispa L). The process is designed as...
Fiber Optic Chemical Sensors on Mars
A fiber optic chemical sensing instrument is described that will measure the reactivity of the martian soil and atmosphere. The self-contained instrument monitors reflectivity changes...
Transfer Vehicle Sizing for Missions to Mars
The purpose of this study is to analyze the interactions between mission and vehicle design parameters, and determine how the selection of a particular trajectory and transit time affects...
Safety Assessment of a Chemical Reactor Vessel
The potential explosion loadings on a chemical reactor vessel is described in this paper. The potential loads presented provide a basis for designing spherical storage vessels which will...
Evaluation of Corroded Steel Chimneys
The paper is focused on the analysis of corroded steel chimneys. Cylindrical steel plates are exposed to thermal and chemical effects. The study is based on the results of extensive measurements...
Return to search