T H E PROBLEM of supplying man with his oxygen requirement and uncontaminated air during prolonged confinement is receiving considerable research attention. In particular, the recovery of oxygen using biological specimens as the mechanism for converting carbon dioxide into oxygen plus other materials has been the subject of many papers recently. There can be no doubt concerning the need for a r...

T HE POTENTIAL medical hazards of man's venture into space will span a number of disciplines in regard to the pathology and deranged physiology to which the human body may be subject in travel beyond the earth's atmosphere. Not the least hazard is that having to do with the effects of radiation to be encountered in free space. This problem is one which is receiving considerable attention from a...

This paper proposes a new concurrent data structure, called parallel hash table, for synchronizing the access of multiple threads to resources stored in a shared buffer. We prove theoretically the complexity of the operations and the upper limit on the thread conflict probability of the parallel hash table. To empirically evaluate the proposed concurrent data structure, we compare the performan...

Many military concepts for future employment of unmanned systems will require coordinated action by teams of unmanned vehicles and often manned/unmanned teams. The effectiveness of these heterogeneous military teams will rely on their ability to perform in dynamic, stressful situations as well as pure human teams do today. Current solutions for teaming of manned and unmanned assets rely on cont...

A multi-user integrated suite of instruments designed to optimize the search for evidence of life on Mars is described. The package includes: -Surface inspection and surface environment analysis to identify the potential Mars landing sites, to inspect the surface geology and mineralogy, to search for visible surficial microbial macrofossils, to study the surface radiation budget and surface oxi...

In today’s global and volatile market, manufacturing enterprises are subjected to intense competition, increasingly shortened product lifecycles increased customization tailoring while being pressured maintain a high degree of cost-efficiency. As consequence, production organizations required introduce more new models variants into existing setups, leading frequent ramp-up ramp-down scenarios w...

AMACOIA (for Approche Multi-Agents pour la COnception d’Installations d’Assemblage) is a tool for designing flexible assembly lines. Its objective is to determine the functional specifications of the constituting equipments (manipulators, fixtures, grippers, conveyors, ...) and the organisational structure (cells, workstations) for the least expensive assembly line able to assemble a product (o...

This paper describes an approach based on reachability calculations for ensuring robust operation guarantees in flight maneuver sequences performed by unmanned aerial vehicles (UAVs) under supervision of human operators, with applications to safety-critical scenarios. Using a hybrid system formalism to model the maneuver sequence, the paper devises systematic procedures for designing switching ...

Abstract For visual quality, the traditional focus on illuminance for paper-based tasks and brightness contrast acuity is becoming less relevant in modern offices with backlit computer screens sporadic use of paper. This research aims to investigate critical correlations between user satisfaction, workstation lighting conditions, physical attributes work area. The statistical analyses were cond...

When the European Research Ministers on November 9, 1987 determined on the "European Long TermSpace Plan 19872000" 1, they opted for a big technology only comparable to nuclear technology or large scale military technologies such as e.g. SDI. The new dimensions European space flight now is aiming at, can be characterized by different aspects: i) The financial resources required to build up the ...