Advanced semiconductor devices are a new source of energy for the 21st century, delivering electricity directly from sunlight. Suitable semiconductor materials, device physics, and fabrication technologies for solar cells are presented in this course. The guidelines for design of a complete solar cell system for household application are explained. Cost aspects, market development, and the application areas of solar cells are presented.
Roberge 6.302 Lecture 05
Description not set
Happy New Year and Welcome to 2012
Dear faculty, staff and students, alumni and friends, You can be proud of the impact you have made in 2011. Click above to see why. Thank you for your hard work and your inspiration. Very best wishes for a successful 2012! France Córdova
Basics of the Coordinate Plane
This selection provides an introduction to the basics of the coordinate plane. An interactive board is used to show the x and y axis, quadrants, and an ordered pair. A tip is also provided to help students learn the number of each quadrant. ( 1:46)
Michael Garlinghouse - Driven to Discover Video Contest
12th Place Michael Garlinghouse, a Nutrition student at the University of Minnesota, shares his passion for rollerblading. This video is part of the Driven to Discover video contest where students were asked to explain what they were driven to discover at the University of Minnesota.
Tissue engineering and stem cell technology
A lecture, "Tissue engineering and stem cell technology" given by Prof ZhanFeng Cui, University of Oxford, at the 10th OIBC Spring Symposium, held jointly with the Department for Continuing Education, at St Edward's School, Oxford, on 4 March 2009. Visit http://media.conted.ox.ac.uk/oibc2 to view the full presentation from Prof ZhanFeng Cui, including his slides.
Kuehne Nagel: Moving Freight and Managing Risks
The Kuehne family started shipping goods throughout Germany more than 125 years ago. Today, Kuehne and Nagel is one of the world’s largest logistics firms, a key element in the global economy. They did it by focusing on staff development.
Fe, C 1.0 (wt%), hypereutectoid alloy
This secondary electron SEM image shows the cementite delineating prior austenite grain boundaries with a thin layer. The amount of proeutectoid phase is very low, with the majority of the area being taken by the pearlite eutectoid. Again each pearlite cell has a different orientation with the ferrite phase being selectively etched.
The gun is part of America's creation story. Gunsmith George Suiter describes the technology of this potent tool.
20.440 Analysis of Biological Networks (BE.440) (MIT)
This class analyzes complex biological processes from the molecular, cellular, extracellular, and organ levels of hierarchy. Emphasis is placed on the basic biochemical and biophysical principles that govern these processes. Examples of processes to be studied include chemotaxis, the fixation of nitrogen into organic biological molecules, growth factor and hormone mediated signaling cascades, and signaling cascades leading to cell death in response to DNA damage. In each case, the availability o
Comparing Fractions With Unlike Denominators
This video teaches students to compare fractions with unlike denominators. A student demonstrates finding a common denominator in order to compare fractions. The problem is worked on a white board. ( 1:21)
California Academy of Sciences: AntWeb
AntWeb, an excellent service of the California Academy of Sciences, provides users with "tools for exploring the diversity and identification of ants (Hymenoptera: Formicidae). These tools have been developed to facilitate the use of ants in inventory and monitoring programs and provide ant taxonomists with images and types." At present, AntWeb offers information on all ant genera worldwide as well as highlighting ants of Madagascar and California in particular. The site provides a search engine
This series of three interactive, multimedia activities introduce and demonstrate the properties of six simple machines. Specifically, the lessons show how levers, pulleys, inclined planes, screws, wheels and axles, and wedges can reduce the amount of work done by humans. After learning about the characteristics of each classification, users can try to find the simple machines that make up a lawn mower. By inspecting the mower from different angles, several simple machines are revealed and must
Tutorial on Optimization Theory and Difference and Differential Equations
This online tutorial is intended for college students taking an early course in mathematical optimization or linear differential equations. Although it is written by a professor of economics, little economic theory is presented. This keeps the material centered on the mathematical aspects of optimization and differential equations, which have a wide range of scientific applications. The text is very well organized and is accompanied by illustrative figures. No prerequisites to the tutorial are l
Students learn that wind and storms can form at the boundaries of interacting high and low pressure air masses. They learn the distinguishing features of the four main types of weather fronts (warm fronts, cold fronts, stationary fronts and occluded fronts) and how these fronts are depicted on a surface weather analysis, or weather map. Students also learn several different ways that engineers help with storm prediction, analysis and protection.
Engineering for the Earth
Young students are introduced to the complex systems of the Earth through numerous lessons on the Earth’s natural resources, processes, weather, climate and landforms. Key earth science topics include rocks, soils and minerals, water and natural resources, weather patterns and climatic regions, wind, erosion, landforms, and the harvesting of fossil fuels — all presented from an engineering point-of-view. (See the Unit Overview section for a list of topics by lesson.) Through many hands-on ac
What is Energy?
With an introduction to the ideas of energy, students discuss specific types of energy and the practical sources of energy. Hands-on activities help them identify types of energy in their surroundings and enhance their understanding of energy.
Online rekenlessen Op www.rekenlessen.nl kun je je rekenvaardigheid oefenen zoveel je wilt. Alle onderdelen van het rekenen komen hier aan bod. De website wordt regelmatig uitgebreid. Je kiest zelf welke oefeningen je …
Op www.rekenlessen.nl kun je je rekenvaardigheid oefenen zoveel je wilt. Alle onderdelen van het rekenen komen hier aan bod. De website wordt regelmatig uitgebreid. Je kiest zelf welke oefeningen je …
Eddie and the Hagfish
Hagfish are amazing ocean fishes! They are found nearly worldwide mostly in deeper ocean environments, and are some of the most primitive fishes in existence...
Reading Rainbow: Watch the Stars Come Out
Videotaped at Ellis Island in 1985, this 28 minute video shows immigrants landing at Ellis Island. It shows the variety of immigrants and they company that they came from that landed in this point of entry. The video is an overview of immigration, but does not offer statistical data and tends to be a general overview.