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Now showing items 31-40 of 51
Deployment related mental health care seeking behaviors in the U.S. military and the use of telehealth to mitigate their impacts on access to care
(Massachusetts Institute of Technology, 2012)
Interviewees report that groups of service members returning from Iraq and Afghanistan often require substantial amounts of mental health care, causing surges in demand at military hospitals. These hospitals have difficulty ...
Quantifying technology infusion and policy impact on low earth orbit communication satellite constellations
(Massachusetts Institute of Technology, 2004)
Technology infusion and policy implementation bring impacts to the trade space of complex engineering systems. This work describes in detail the frameworks for quantitative analyses on these impacts, demonstrates their use ...
Unique abilities of hopper spacecraft to enable national objectives for solar system exploration
(Massachusetts Institute of Technology, 2011)
In comparison with conventional and other conceived approaches, hopper spacecraft offer unique advantages in exploring Solar System objects beyond Earth. The present work began with a survey - based on documents from the ...
What drives spacecraft innovation? : a quantitative analysis of communication satellite history
(Massachusetts Institute of Technology, 2009)
The overall goal of this research is to develop a better understanding of how innovation can, and should, happen in the space sector. Part A: Towards an Empirical Measure of Spacecraft Innovation, frames the discussion of ...
A methodology for identifying flexible design opportunities
(Massachusetts Institute of Technology, 2008)
Technical and operational uncertainties dynamically change environments for engineering systems. Flexibility allows systems to continue delivering value as the uncertainty unfolds. Uncertainty can better be managed by ...
An assessment of the health implications of aviation emissions regulations
(Massachusetts Institute of Technology, 2008)
An exploration of the health implications of aviation emissions regulations is made by assessing the results of a study of aviation's effects on United States air quality mandated by the Energy Policy Act of 2005. The ...
Design for affordability in defense and aerospace systems using tradespace-based methods
(Massachusetts Institute of Technology, 2014)
Program failures have plagued the defense and aerospace industry for decades, as unanticipated cost and schedule overruns have rendered the development of systems ineffective in terms of time and cost considerations. This ...
Modernizing systems engineering : cognitive systems and model-based approaches for spacecraft architecture development
(Massachusetts Institute of Technology, 2014)
Systems engineering exists as a discipline to enable organizations to control and manage the development of complex hardware and software. These methods are particularly essential in the development of space systems, which ...
Public health impacts of excess NOx̳ emissions from Volkswagen diesel passenger vehicles in Germany
(Massachusetts Institute of Technology, 2017)
In September 2015, the Volkswagen Group (VW) admitted the use of "defeat devices" designed to lower emissions measured during VW vehicle testing for regulatory purposes. Globally, 11 million cars sold between 2008 and 2015 ...
Emergence of second-generation low earth orbit satellite constellations : a prospective technical, economic, and policy analysis
(Massachusetts Institute of Technology, 2018)
Modern proposals for Low Earth Orbit (LEO) satellite constellations underscore the tremendous potential and versatility of distributed spacecraft missions (DSMs), but they have also begun to stress the limits of the existing ...