Linking objective and subjective modeling in engineering design through arc-elastic dominance

Engineering design in mechanics is a complex activity taking into account both objective modeling processes derived from physical analysis and designers’ subjective reasoning. This paper introduces arc-elastic dominance as a suitable concept for ranking design solutions according to a combination of objective and subjective models. Objective models lead to the aggregation of information derived from physics, economics or eco-environmental analysis into a performance indicator. Subjective models result in a confidence indicator for the solutions’ feasibility. Arc-elastic dominant design solutions achieve an optimal compromise between gain in performance and degradation in confidence. Due to the definition of arc-elasticity, this compromise value is expressive and easy for designers to interpret despite the difference in the nature of the objective and subjective models. From the investigation of arc-elasticity mathematical properties, a filtering algorithm of Pareto-efficient solutions is proposed and illustrated through a design knowledge modeling framework. This framework notably takes into account Harrington’s desirability functions and Derringer’s aggregation method. It is carried out through the re-design of a geothermal air conditioning system

Accessibility Design and Operational Considerations in the Development of Urban Aerial Mobility Vehicles and Networks

Urban aerial mobility vehicles and networks have recently gained considerable interest in the aviation community. These small, short-range vehicles with all-electric or hybrid-electric propulsion systems, tailored to metropolitan aerial transportation needs, promise to radically change passenger mobility and cargo distribution in cities. Accessibility issues have not been a major consideration in UAM vehicle and network discussions to date. This paper seeks to help change that

Design and testing of an aerospace dew point hygrometer final report

Small sensor hygrometer for measuring dew point in manned spacecraf

Design and testing of an aerospace dew point hygrometer Final report

Thermoelectrically cooled miniature dew point hygrometer system for spacecraft instrumentation system

PUSH Buffalo\u27s Community Housing Co-operative: A Case Study in Green Building Rehabilitation

Between March 2006 and March 2007, a group of community organizers at People United for Sustainable Housing (PUSH) used green building methods to create affordable, safe, and sustainable housing by rehabilitating a formerly abandoned four unit building on Buffalo’s West Side. Organizations and agencies involved in affordable housing can learn from PUSH’s example and should replicate or support similar projects because greener and more affordable housing will benefit the community, the residents, the environment, as well as Buffalo as a whole

Apollo experience report: Development flight instrumentation

Development flight instrumentation was delivered for 25 Apollo vehicles as Government-furnished equipment. The problems and philosophies of an activity that was concerned with supplying telemetry equipment to a space-flight test program are discussed. Equipment delivery dates, system-design details, and flight-performance information for each mission also are included