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Full Biography: Erwin Rommel
Erwin Rommel was a highly decorated officer in World War I and was awarded the Pour le Mérite for his exploits on the Italian front. Rommel soon caught the eye of Hitler and was promoted to field marshal. In World War II, he further distinguished himself as the commander of the 7th Panzer Division during the 1940 invasion of France. However, it was his leadership of German and Italian forces in the North African campaign that established the legend of the Desert Fox. He is considered to h
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Voorblad kerstcontract
kersttakje.jpg

Dit document bevat een voorblad voor een contractwerk rond het thema Kerstmis. Je kan de opgesomde opdrachten vervangen door je eigen taken.


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18.335J Introduction to Numerical Methods (MIT)
This course offers an advanced introduction to numerical linear algebra. Topics include direct and iterative methods for linear systems, eigenvalue decompositions and QR/SVD factorizations, stability and accuracy of numerical algorithms, the IEEE floating point standard, sparse and structured matrices, preconditioning, linear algebra software. Problem sets require some knowledge of MATLAB®.

Farming on Mars & the Moon
The question of how to grow edible and useable crops on the moon and Mars is being explored by a University of Mississippi administrator directing a cutting-edge research project aboard the International Space Station. Video by Mary Stanton.
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World Science Festival 2008: Science Fun Fact #1
A piece of paper cannot be folded in half more than seven times. The first of the World Science Festival's Science Fun Facts.  (00:43)
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Nelson Mandela - First Interview (1961)

In this interview from May 1961, a 42 year-old Nelson Mandela gives his views on a multi-racial South Africa with equal opportunities and rights for all South Africans.

read more


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Cinemagraphs: The new animated GIF?

I thought this might be a fun and creative task to try with your kids.

Animated GIFs, that are a sequence of images on top of each other, as a miniature movie are always fun to watch. Be it a small portion of a movie, a cartoon or… err, anything, they’ve always been heavily popular.

But Jamie Beck, a fashion photographer has introduced a new form: Cinemagraph.

Author(s): Kevin Cummins

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外媒有偏见 新疆7.5事件被移花接木
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Carolling at Memorial Church
Each year in December, Harvard's Memorial Church presents members of the University community and beyond with the gift of song. For more than a century, the church's Harvard University Choir has performed two Christmas carol services that include readings by the clergy, and a mix of traditional and contemporary carols and hymns sung by both the choir and congregation. Read more in the Harvard Gazette: http://news.harvard.edu/gazette/story/2012/12/a-musical-gift/
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Visual Studio 2012 Update 1 | Visual Studio Toolbox

Starting with Visual Studio 2012, Microsoft has moved to providing update to Visual Studio on a regular cadence of shorter intervals. The first such update, Visual Studio 2012 Update 1, is now available. In addition to bug fixes, Update 1 contains new features in four areas: Windows development, SharePoint development, agile teams, and continuous quality. In this episode, Brian Keller shows us some of his fa
Author(s): Robert Green

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2.8.1 Adipose tissue

In this unit, there have been several references to adipose tissue. You probably have a sense of a rather inert (and, perhaps, hard to shift!) tissue acting as a long-term energy store, but this is only a small part of the story.

Adipose tissue consists of individual fat cells (adipocytes (Figure 12)) togeth
Author(s): The Open University

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2.4 Obesity – an evolutionary perspective

If you were now to take a broader biological approach to the data discussed in the previous section you might still be puzzled. Excess body weight leads to a variety of diseases, including diabetes, osteoarthritis and so on – surely this must reduce overall biological fitness.

SAQ 21

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2.3 Experimental studies of energy balance

The energy that a human takes in, primarily in food or nutritive fluids, has to be balanced by the energy lost in various ways. Some energy is used to maintain basic metabolic processes, some in physical activity while the remainder is lost as heat, or in the faeces or urine. If energy input and output do not balance, then the residue must either result in a loss or a gain in body weight.

One way of estimating these energy fluxes is to use the technique of whole room indirect calorim
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1.7.1 Unit summary

1. A coordinate system provides a systematic means of specifying the position of a particle. A system in one dimension involves choosing an origin and a positive direction in which values of the position coordinate increase. Values of the position coordinate are positive or negative numbers multiplied by an appropriate unit of length, usually the SI unit of length, the metre (m).

2. The movement of a particle along a line can be described graphically by plotting values of the particle's
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1.6.4 Drop-towers revisited

In Section 1 we described how research into near weightless conditions can be carried out on Earth by using a drop-tower or a drop-shaft (Figure 41). We are now in a position to examine drop-shafts in more detail (Example 3).

Figure 41
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1.6.3 The acceleration due to gravity

In the absence of air resistance, an object falling freely under the influence of the Earth's gravity, close to the surface of the Earth, experiences an acceleration of about 9.81 m s−2 in the downward direction. The precise value of the magnitude is indicated by the symbol g and varies slightly from place to place due to variations in surface altitude, the effect of the Earth's rotation and variations in the internal composition of the Earth. Some typical values f
Author(s): The Open University

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1.6.2 The equations of uniformly accelerated motion

Equations 22, 23 and 24 provide a complete description of uniformly accelerated motion. By combining them appropriately, it is possible to solve a wide class of problems concerning the kinematics of uniformly accelerated motion. Nonetheless, those particular equations are not always the best starting point for the most common problems. For example, it is often the case that we want to know the displacement from the initial position after some specified period of constant acceleration, rather
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1.5.3 A note on functions and derivatives

This subsection introduces two crucially important mathematical ideas, functions and derivatives, both of which are used throughout physics.


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1.5.2 Instantaneous acceleration

The procedure of Question 15 for determining the instantaneous velocity of the car can be carried out for a whole set of different times and the resulting values of vx can be plotted against t to form a graph. This has been done in Figure 28, which shows how the velocity varies with time. At time t = 0 s, the car has zero velocity because it starts from rest. At later times, the velocity is positive because the car moves in the direction of in
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1.5.1 Instantaneous velocity

Uniform motion is simple to describe, but is rarely achieved in practice. Most objects do not move at a precisely constant velocity. If you drop an apple it will fall downwards, but it will pick up speed as it does so (Figure 24), and if you drive along a straight road you are likely to encounter some traffic that will force you to vary your speed from time to time. For the most part, real motions are non-uniform motions.

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