Micropacked column for a chromatographic system

Micropacked column for rapid chromatographic analysis using low gas flow rate

Subminiaturized gas chromatograph gives fast, efficient analysis

Space oriented, lightweight, subminiaturized gas chromatograph analyzes gas samples in a few seconds with a carrier gas flow of one milliliter per second. In extraterrestrial exploration, the system could be used with a mass spectrometer for detection of life-supporting compounds

Pre-passage questions: the influence of structural importance

Bibliography: leaves 23-26Supported in part by the National Institute of Education under contract no. 400-76-011

Analysis of separation of the space shuttle orbiter from a large transport airplane

The feasibility of safely separating the space shuttle orbiter (140A/B) from the top of a large carrier vehicle (the C-5 airplane) at subsonic speeds was investigated. The longitudinal equations of motion for both vehicles were numerically integrated using a digital computer program which incorporates experimentally derived interference aerodynamic data to analyze the separation maneuver for various initial conditions. Separation of the space shuttle orbiter from a carrier vehicle was feasible for a range of dynamic-pressure and flight-path-angle conditions. By using an autopilot, the vehicle attitudes were held constant which ensured separation. Carrier-vehicle engine thrust, landing gear, and spoilers provide some flexibility in the separation maneuver

The Aerospace Vehicle Interactive Design system

The aerospace vehicle interactive design (AVID) is a computer aided design that was developed for the conceptual and preliminary design of aerospace vehicles. The AVID system evolved from the application of several design approaches in an advanced concepts environment in which both mission requirements and vehicle configurations are continually changing. The basic AVID software facilitates the integration of independent analysis programs into a design system where the programs can be executed individually for analysis or executed in groups for design iterations and parametric studies. Programs integrated into an AVID system for launch vehicle design include geometry, aerodynamics, propulsion, flight performance, mass properties, and economics

False investigators and coercive citation are widespread in academic research

A recent study has revealed widespread unethical behaviour in academic research. Allen Wilhite focuses on two activities in particular; the addition to funding proposals of investigators not expected to contribute to the research, and editors who coerce authors to add citations to manuscripts even though those citations were not part of the scholars' reference material. Research institutions, funders, rankings bodies, and scholars themselves can and should do more to address such behaviours