Posts from web.mit.edu
Designing an Authentication System: a Dialogue in Four ScenesEuripides:You've got rings under your eyes this morning. Athena:Well, you know. Another one of those long nights. Euripides:Have you solved the replay problem? Athena:I think so. Euripides:Have a seat. She does. Athena:As usual, I feel compelled to restate the problem. Tickets are reusable within a limited timespan, say eight hours. If someone steals your tickets and ...1
Update from President L. Rafael Reif to the MIT Community | COVID-19 (coronavirus) UpdateMarch 10, 2020 Subject: A significant new step in response to COVID-19 To the members of the MIT community, When I wrote last week, we understood that our approach to campus life would need to change, broadly and in many details. As COVID-19 continues to spread, and as public health leaders have offered more definitive guidance, we have come to see that our community has a significant role...1
Rare Metals BackgroundRare Metals and Metalloids (RMs) are physically and chemically dissimilar to rare earth elements. However the RMs are diverse and share few overarching similarities. The critical rare metals (RMs) and metalloids discussed in this section are niobium, tantalum, cobalt, indium, zirconium, gallium, and lithium.