What Floats Your Boat?
Students use modeling clay, a material that is denser than water and thus ordinarily sinks in water, to discover the principle of buoyancy. They begin by designing and building boats out of clay that will float in water, and then refine their designs so that their boats will carry as great a load (metal washers) as possible. Building a clay boat to hold as much weight as possible is an engineering design problem. Next, they compare amount of water displaced by a lump of clay that sinks to the am
Urban Growth: Washington, District of Columbia
Starting with a view of the Washington, D.C., metropolitan area, the D.C. border and the Beltway fade in. The view then pushes in, indicating urban growth with red dots. Data sets for 1973, 1980, 1985, 1990, and 1996 are presented chronologically.
Seasonal NDVI for North America. 1981-2000 averaged with month notation.
Seasonal NDVI for North America. 1981-2000 averaged with month notation. 15 frames-month
3.2 Behavioural approaches Behavioural therapies are based on principles of classical conditioning and operant conditioning (the latter being more properly referred to as behaviour modification therapy). Operant conditioning is about the presentation of a reinforcement being dependent (contingent) on the appearance of a given behaviour. Based on this idea, Skinner (1953) suggested that sometimes ‘abnormal’ behaviour is the result of bad contingency management, where inappropriate behaviours have
1.5.1 Definition by exclusion A person is ‘dyslexic’ if no alternative explanation can be offered for their reading and writing difficulties. In the UK, interest in children who showed a specific lack of ability in literacy grew as all children became entitled to a basic education. For the first time there was an expectation that all adults should be literate. Initially, it was proposed that specific difficulties in
1.4.1 What is dyslexia? Dyslexia involves difficulties in learning to read and write. However, this is not the only form of difficulty that people with dyslexia experience. They usually have particular difficulties with coding: learning and retrieving associations between verbal and visual information. The most obvious example is when we have to learn what sounds the letters of the alphabet make, but this difficulty can also affect the speed with which dyslexic people are able to learn and recall the names fo
3.3.1 A conflict of interest One of the difficulties of the involvement of drug companies in the mental health field is that it produces a conflict of interest. To put it crudely, drug companies rely on a continuing supply of patients to keep them in business. This is not always congruent with people's best interests, as you will see below. Although mental health services are intended to help people experiencing mental distress, they also have other driving forces. The market economy model of provision has encouraged the
Up Close 5 Minute Highlights: Xavier Rolet, CEO London Stock Exchange Space science and Climate change Lisa Schulte, Iowa State University Landscape Ecologist TEDx McMaster U - Cybernetic Orchestra Sea otter A letter to a voluntary organization Northeastern University Street Smarts: Apocalypse Edition Income Differences Expedition 27: Spiders in Space 04.05.2011 – Langsam gesprochene Nachrichten Octopus and clam 3.22 Extract 3 References Interviews with Pardy and students at the Lewenberg School
5 minute highlights of the speech given by Xavier Rolet, CEO of the London Stock Exchange, at London Business School's Up Close speaker event on 10th February 2010.
As part of Mt Stromlo’s centenary celebrations for 2011, this lecture series provides an opportunity to hear from experts in space science technology. In order to understand fully the causes of climate change we must understand the complex interactions that control our environment on a global scale. Space assets provide the most effective way of studying the conditions, composition and changes of our atmosphere/biosphere on a planet-wide scale. This talk will first explore what is 'known'
Research News from Iowa State University's College of Agriculture and Life Sciences. Lisa Schulte, Iowa State University Landscape Ecologist, discusses her latest publication Homogenization of northern U.S. Great Lakes forests due to land use.
Directed by Dr. David Ogborn
Sea otters are mammals because they have fur covering their bodies and whiskers near their noses.
After this chapter you will be able to write a business letter. whilst carrying out this task you apply the typographical conventions and BIN standards and you also structure the information appropriately.
Our Street Smarts reporter asked Huskies how they would spend their last day if the world was ending tomorrow.
Income differences can be measured narrowly or broadly. A narrow definition might include only work for which pay is received, what economists call earnings, which can range from an hour to a year to a lifetime. A less narrow definition of income could add to earnings "unearned" income, which includes sources such as transfer payments, interest and dividends, or capital gains.
Two golden orb spiders are delivered by the STS-134 crew to the International Space Station so researchers can observe the arachnids' habits in microgravity.
Trainieren Sie Ihr Hörverstehen mit authentischen Materialien. Nutzen Sie die Nachrichten der Deutschen Welle von Mittwoch – als Text und als verständlich gesprochene Audio-Datei. Die US-Regierung hat ihre Darstellung der Tötung des Al-Kaida-Chefs Osama bin Laden teilweise revidiert. Der Sprecher von Präsident Barack Obama, Jay Carney, sagte, Bin Laden sei während der Kommandoaktion unbewaffnet gewesen. Dagegen seien andere Männer in dem Gebäude bewaffnet gewesen und hätten Widerstand
One reason why both the octopus and the clam are considered to be mollusks is because they lack body segmentation. Although the octopus and the clam look very different from each other, they are both mollusks.
Why are so many people now turning to complementary and alternative medicine and why do approaches to complementary and alternative medicine (CAM) raise such controversy? This unit explores the following three key areas: ‘Why people use complementary and alternative medicine’, ‘Critical issues in the therapeutic relationship’ and ‘Ethics in complementary and alternative medicine’.
Footage of racially integrated music and math classes at the Solomon Lewenberg Middle School. Pam Bullard interviews two Lewenberg School students, Xerxes Hammond and Alfred Tiberi, about the school. Both students praise the school and its teachers. Bullard interviews Jim Pardy (Assistant Headmaster, Lewenberg School) about the opening of school, school integration, and how budget cuts have affected the Lewenberg School. Pardy says that the school had a strong academic record for the previous ye
