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Now showing items 41-50 of 56
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 ...
Investigating the role of microglia in myelin development
(Massachusetts Institute of Technology, 2021)
We investigate the role of microglia in myelin development. Myelination is an essential process in early development that consists of the ensheathment of axons by myelin, which ensures rapid conduction of action potentials. ...
An exercise in selecting low-cost air quality sensor placements within an urban environment
(Massachusetts Institute of Technology, 2021)
Air pollution poses the most important environmental health risk to citizens of major cities all over the world. The high cost of current monitoring programs means that enforcement of current regulation, such as the United ...
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 ...
The impact of distributed energy resources (DERs) in integrated gas-electricity energy systems
(Massachusetts Institute of Technology, 2017)
Our gas and power energy systems are interconnected, which makes the decision to provide energy a non-trivial one for consumers and the system as a whole. The focus of this thesis is on the long-term planning of integrated ...
The economics of cryptographic trust : understanding certificate authorities
(Massachusetts Institute of Technology, 2016)
Certificate Authorities (CAs) play a crucial role in HTTPS, the mechanism that secures all of the web's most important communication; if it has a log-in page, it must use HTTPS. However, recent history is littered with ...
Hydrophobicity of rare-earth oxide ceramics and their application in promoting sustained drop-wise condensation
(Massachusetts Institute of Technology, 2016)
Hydrophobic surfaces that are robust can have widespread applications in various industries including energy, hydropower, and transportation. In particular, hydrophobic materials promote dropwise condensation, which results ...
Encryption to implement mechanism design solutions
(Massachusetts Institute of Technology, 2021)
Encryption - the process of encoding information - mitigates the damage that comes from obstacles to exchange: private information, limited communication, and limited commitment. Here I would emphasize specifically that ...