Description: In this lecture, the professor talked about the standard Big Bang, cosmic inflation, evidence for inflation, Cosmic Microwave Background (CMB), universe to multiverse, dark energy, etc. Instructor: Alan GuthLearn more: ...

Description: This lecture uncovers the basic science of semiconductor devices and solar cells, including p-n junction and photovoltaic effects. Also, it explains the phenomenon of Shockley-Queisser limit. Instructor: Prof. Gang Chen

Description: This lecture provides more details on the application of Snell's Law at one single interface; later, more discussion of the wave propagation in multi-layered structures, for instance thin films. It also gives out information about the first midterm exam. ...

Description: This lecture continues to explore the repulsive force between particles and surfaces in liquids and learn more on electrokinetics. It also investigates the size effect on phase transition. Instructor: Prof. Gang Chen

Description: This lecture explores drivers of movements, such as interest groups and changing preferences, and how they affect environmental movements as well as the formation of public policy, efforts, and parties. Instructor: Richard Schmalensee

Description: This lecture starts by using the comparison model to prove lower bounds for searching and sorting, and then discusses counting sort and radix sort, which run in linear time. Instructor: Erik Demaine

Description: Priority queues are introduced as a motivation for heaps. The lecture then covers heap operations and concludes with a discussion of heapsort. Instructor: Srini Devadas

Description: This lecture starts with dictionaries in Python, considers the problems with using a direct-access table, and introduces hashing. The lecture discusses hashing with chaining, which is one way of dealing with collisions. Instructor: Erik Demaine

Description: This lecture covers table resizing, amortized analysis, string matching with the Karp-Rabin algorithm, and rolling hashes. Instructor: Erik Demaine

Note: This video is from the Fall 2007 class. This lecture continues discussion of Charlie Chaplin, comparing his films to those of Buster Keaton. Outline: - Keaton vs. Chaplin - Three passages - Cops (1922) - The Gold Rush (1925) - City Lights (1931) - Modern Times ...

This lecture continues the discussion from lecture 12, and also includes material on how families make decisions about family planning. Instructor: Esther Duflo

In this lab, students connect several small PV panels together into a circuit. They then take their solar arrays outside and compare the output of each individual panel to that of the array as a whole, and measure the effect shading has on the array. Speaker: Amit ...

Four student teams (juice bag sealer, charcoal burn, solar charger for cell phones, rice dehusking) present initial designs, preliminary test results, and next steps, and get feedback from guest reviewers and mentors. Speaker: MIT Students

Three student teams give 20 minute presentations about their week-long visits to community partners, in which they test and refine various energy project designs. Speaker: MIT Students, Amy Banzaert

This lecture covers gender discrimination and uneven gender ratios in various countries, including India. Instructor: Abhijit Banerjee

Description: This lecture covers experiments conducted to understand savings and borrowing in Kenya and the Phillippines. Instructor: Abhijit Banerjee

In this pre-lab lecture, students learn about using organic matter to create biogas for cooking and when biodigesters are advantagous vs impractical. Finally, they go over a specific biodigester design in great detail, learning how each part works. Speaker: Amit Gandhi

This lecture discusses some of the most effective and cheapest ways to promote good health, such as bednets, immunization and breast feeding. Instructor: Esther Duflo

Lecture 1 provides an introduction to the study of global poverty. The class discusses the challenges of world poverty. Instructor: Abhijit Banerjee

Project Laboratory in Mathematics is a course designed to give students a sense of what it's like to do mathematical research.