A selection of Khan academy Maths videos have been translate into Xhosa supported by the Maths depar
Chordates - CrashCourse Biology #24
Hank introduces us to ourselves by taking us on a journey through the fascinatingly diverse phyla known as chordata. And the next time someone asks you who you are, you can give them the facts: you're a mammalian amniotic tetrapodal sarcopterygian osteichthyen gnathostomal vertebrate cranial chordate. (12:10)
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
Sneller klaar bundel : Allerlei opdrachten
Kinderen van het eerste leerjaar die sneller klaar zijn, kunnen zelfstandig in deze bundel werken. Er komen heel wat rekenoefeningen aan bod zoals optellen, splitsen, aftrekken, de tafel van 2 en deze van 10. Dit afgewisseld met …
Fall 2012 Capstone Presentation - Introduction
On December 13th, students from the Fall Capstone class presented their projects. Taught this semester by Prof. Gavin Shatkin, the Capstone is a required course that all Master's students in the LPP and MURP programs take in their final semester. This semester's students worked with Street-Works and the City of Quincy on a plan for the redevelopment of the Quincy Center MBTA Station.
7 Some philosophical issues
In this unit we have considered global issues that have implications for our health and the health of future generations. This places our own lives in a different context and also indicates the uncertainties that surround the future. Whilst some environmental changes have very direct health consequences, we should not forget the indirect benefits that accrue from a healthy planet. The principle that ‘we should hand on to the next generation an environment no less rich than the one we
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/
Sing, Sing, Sing
Performed by the University of Richmond Jazz Ensemble at the 2012 Cuban Spectacular. Featuring dancers Myra Daleng and Michael Whitten, Emma Phillips, '13, on drums, and Nick Yeutter, '15 on clarinet. Directed by Dr. Mike Davison.
4.3 Gamete production in men
A sexually mature man is producing sperm all the time at a rate of around 300–600 per gram of testis per second. This provides the 500 million or so which are released at each ejaculation. But the formation of an individual sperm takes about nine weeks (64 days). Sperm are produced in the testes, and production is most efficient at a temperature several degrees lower than the normal body temperature of 371°C. For this reason the testes (plural of testis) are suspended outside the body cavi
The rate at which water infiltrates into the ground depends on the permeability of the rocks and the state of the ground surface. Below the ground surface there is an unsaturated zone which has air in the pore spaces, and a saturated zone which has all the pores filled with water. The water table is the boundary between the unsaturated zone and the saturated zone, and is the level at which water stands in wells. Water below the water table is called groundwa
It is important to distinguish clearly between porosity and permeability. Porosity is a measure of how much water can be stored in a rock, whereas permeability is a measure of the properties of a rock which determine how easily water and other fluids can flow through it (see Section 4). Permeability depends on the exte
1 Wave energy
The energy carried by ocean waves derives from a proportion of the wind energy transferred to the ocean surface by frictional drag. So, ultimately it stems from the proportion of incoming solar energy that drives air movement. Just how much energy is carried by a single wave depends on the wind speed and the area of ocean surface that it crosses; wave height, wavelength, and therefore wave energy, are functions of the distance or fetch over which the wind blows. Not surprisingly the ma
Waterlogged organic matter accumulates in deltaic, coastal barrier or raised mires to form peat. Coal forms by the compaction and decomposition of peat. Chemical changes imposed by increasing temperature and pressure over time determine the coal rank.
Coalfields can be classified as either exposed or concealed, depending on whether or not the coal-bearing rocks are hidden by younger strata. In most coalfields, mining commenced in the shallower
Eukaryotic cells contain numerous distinct types of membrane-bound compartment. Transport vesicles move proteins and other molecules between the compartments.
Proteins contain signalling sequences or patches that specify their destination compartment.
Proteins destined for lysosomes, secretion or the plasma membrane are synthesised in the ER, transported to the cis Golgi, modified in the Golgi apparatus, and sorted and pa
1.7 Localization of signalling proteins
Since signalling proteins cannot diffuse as rapidly as small second messengers, they need be close to their downstream target in order to be able to function. Where they are located with respect to both their subcellular position and their immediate neighbours is therefore vitally important. The plasma membrane is usually the initial location, and proteins can be attached to the plasma membrane in various ways (Author(s):
By the end of this unit you should be able to:
recognise the terminology which is used to describe the properties and behaviour of active galactic nuclei (AGN);
manipulate numbers, algebraic symbols and mathematical functions in equations.
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