The Versatile Test Reactor (VTR) is a new fast spectrum test reactor being developed in the United States under direction of US Department Energy, Office Nuclear Energy. VTR mission to enable accelerated testing advanced fuels and materials required for technologies. This includes neutron irradiation capabilities which would support alternate coolants including molten salt, lead/lead-bismuth eu...

work engagement literature has been dominated by quantitative research methods. this article aims to study work engagement antecedents using mixed-method sequential explanatory design. this design starts with the collection and analysis of quantitative data followed by the subsequent collection and analysis of qualitative data. the qualitative phase of the study was designed to incorporate the ...

With progress of space technology and increase of space mission demand, requirements for robustness and reliability of space systems are ever-increasing. For the whole space mission life cycle, the most important decisions are made in the conceptual design phase, so it is very crucial to take uncertainties into consideration in this initial phase to assure a feasible, reliable and robust concep...

this paper focuses upon the development of an efficient method for conceptual design optimization of a satellite. there are many option for a satellite subsystems that could be choice, as acceptable solution to implement of a space system mission. every option should be assessment based on the different criteria such as cost, mass, reliability and technology contraint (complexity). in this rese...