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...systems. My PhD, as part of the International Development research in the Astrobiology department of The Open University, involves investigating the potentials and challenges of using innovations in space technologies for sustainable development. Currently, in my first year, what I love most about this research topic is how it combines science, technology, engineering and...

...systems. Introduction to the calculus of variations consists of material from MS327 Unit 5, Introduction to the calculus of variations, and has five sections in total. You should set aside about three to four hours to study each of the sections; the whole extract should take about 16 hours to study. The extract is a small part (around 8%) of a large course that is studied...

...thinking is exactly the way that we today distinguish useful treatments from useless or positively harmful ones. [MUSIC PLAYING] INTERVIEWER The world’s first controlled clinical trial demonstrated that one of the treatments had won hands down. Within a week, the sailors who had eaten the oranges and the lemons were fit for duty and were nursing the others back to...