Rayleigh-Taylor Instabilities in Supernovae Explosions: Density
The following calculation shows the development and evolution of Rayleigh-Taylor instabilities which develop behind the supernova blast wave on a time scale of a few hours. The initial model was chosen to provide a good representation for the progenitor star for Supernova 1987A. The calculation was performed using the Piecewise-Parabolic Method for hydrodynamics on a two-dimensional spherical grid with rotational symmetry about the vertical axis and equatorial symmetry about the horizontal axis.
Texas Wildfires Views from Station
External cameras mounted on the International Space Station as well as handheld cameras captured these dramatic views Tuesday of wildfires burning around Bastrop, Texas.
Ronald DePinho, M.D., on employee expectations
On Thursday, Sept. 1, 2011, Ronald DePinho, M.D., began his presidency of MD Anderson Cancer Center. Here he shares his expectations of MD Anderson employees.
DePinho is internationally recognized for basic and translational research in cancer, aging and age-associated degenerative disorders. He's the fourth full-time president of MD Anderson.
DePinho succeeds John Mendelsohn, M.D., who remains on MD Anderson faculty, returning to clinical and translational research as co-director of a new In
Open Classroom - 09/07/2011 #2 Dukakis
The Role of Government in the 21st Century
This week: 21st Century Challenges to the Conception of Government with Robert Kuttner as Guest Speaker
Exponents -- Introduction
A introduction to the teacher's guide on exponents.
Absolute Beginner #18 - Loving and Hating in Japanese
Learn Japanese with JapanesePod101.com! Even though you are staying with your close friend in Japan, you feel like you have to be on your best behavior. You’re making your bed every day, helping around the house, and doing whatever chores you can find to assist your Japanese buddy. When she suggests sushi for dinner, you [...]
"Probability and Random Variables, Spring 2009"
" This course introduces students to probability and random variables. Topics include distribution functions, binomial, geometric, hypergeometric, and Poisson distributions. The other topics covered are uniform, exponential, normal, gamma and beta distributions; conditional probability; Bayes theorem; joint distributions; Chebyshev inequality; law of large numbers; and central limit theorem."
Introduction to Rhythmic Studies
Introduction to rhythmic studies employed for musicianship courses at Towson University.
CBS Show Time Spanish – Lesson 22
In this week’s lesson, Mark and Alba talk about music. Their discussion includes talk of playing musical instruments and how listening to music is changing because of technology. In the intermedio, José provides a couple of interesting phrases which can be used to say that you find something difficult. Language points covered incl
Oefensite Nederlands : Spelling, woordleer, zinsleer & NT2 Op deze site vind je theorie en oefeningen Nederlands:
Expert source on FEMA funding freeze available to media
Vanderbilt University researcher James Fraser has done extensive research on FEMA, buyouts and flood mitigation policies and is available to talk to media about the recent freeze on FEMA funding.
Leesoefening: Working to work
Na dit hoofdstuk kan je in officiële teksten over werken in het buitenland de gedachtegang volgen en specifieke informatie selecteren.
School House Rocks
Enseignement primaire et TICE
Sept spécialistes internationaux de l'Unesco en matière d'enseignement primaire avec les nouvelles technologies s'expriment sur les principaux changements qu'elles apportent, s'appuyant sur un ou deux exemples de bonne pratique, sur des expériences réussies dans leur pays.
Enlisted soldier delivers on personal promise to get college degree.
Christine is a proud veteran of the U.S. Army. Married, with three children, Christine had always intended on getting a college degree, but as she says "life got in the way." While stationed at Penn State she got connected with Penn State Adult Learner Programs who not only helped with getting her acclimated to college life but encouraged her to think about studying abroad. Watch and see where Christine's journey takes her. Produced by: Adult Learner Programs
Factors Affecting Friction
Based on what they have already learned about friction, students formulate hypotheses concerning the effects of weight and contact area on the amount of friction between two surfaces. In the Associated Activities (Does Weight Matter? and Does Area Matter?), students design and conduct simple experiments to test their hypotheses, using procedures similar to those used in the previous lesson (Discovering Friction). An analysis of their data will reveal the importance of weight to normal friction (
U.S. airports react to 9/11 'threat'
Sept. 10 - Some U.S. airports further beef up security after intelligence about a plot linked to the 9/11 anniversary targeting Washington D.C and New York City. Paul Chapman reports.
Chavez condemns Syrian sanctions
Sept.10 - Venezuela's Hugo Chavez speaks out against sanctions imposed on Syria on behalf of leftist bloc of Latin American nations. Jessica Gray reports.
Reading Comprehension Exercise: How to Make an Inference
This selection demonstrates how to make a detail-based inference. A passage and question are shown , and the instructor gives specific directions for using information from the passage to make an inference and answer the question. ( 1:33)
How the Ancient Egyptians Did Multiplication
The method used by ancient Egyptians to solve multiplication problems is demonstrated in this student-created video. The process is explained step-by-step as the student's work is shown on a piece of paper. ( 1:07)
