IPL: Photosystem II: how plants use sunlight to give us oxygen, food and fuel

Professor Julian Eaton-Rye's Inaugural Professorial Lecture. Tuesday, 10 December 2013.

Pumpkin Seeds

A grade 1-2 class, working in groups, develops their sense of larger

numbers by estimating and counting the number of seeds in pumpkins. NCTM standards: number sense and numeration, estimation, communication, reasoning.

How to Draw Flames

Drawing flames in a cartoon form is easy-start with the base and work your way up in zig zag lines. Step-by-step narration by artist Danny Page. English captions. (2:57)

Freedom of Expression and Hate Speech: What International Human Rights Law Says [Audio]

Speaker(s): Navi Pillay | In recent years, the world has witnessed a number of incidents involving hate speech at times with wide-ranging and global repercussions. Many governments have put in place measures which not always are in consonance with international human rights law. This lecture recalls the relevant provisions of the International Covenant on Civil and Political Rights and the International Convention on the Elimination of Racial Discrimination and showcases the jurisprudence of the

Defrag Tools #99 - Writing a Debugger Extension Part 4 | Defrag Tools

In this episode of **Defrag Tools**, Andrew Richards and Chad Beeder continue a series on writing a Debugger Extension for the Debugging Tools for Windows. The series is based on a 3 part MSDN Magazine series that Andrew wrote back in early 2011.

**Resources:**Writing a Debugging Tools for Windows Extension - Part 1 - March 2011

Author(s):

Multiplying Rationals

Multiplying rational expressions is basically two simplifying problems put together. This video clip explains how to multiply rationals by factoring both numerators and denominators and identifying equivalents of one to cancel. Dividing rational expressions is the same as multiplying with one additional step—we take the reciprocal of the second fraction and change the division to multiplication. (1:41)

Central Angles

This video explains how a central angle is an angle where the vertex is on the center of the circle and the endpoints are on the circle. The endpoints on the circle are also the endpoints for the angle's intercepted arc. The angle measure of the central angle is congruent to the measure of the intercepted arc which is an important fact when finding missing arcs or central angles. (2:12)

Inscribed Angles

This video describes how inscribed angles are angles whose vertices are on a circle and that intersect an arc on the circle. The measure of an inscribed angle is half of the measure of the intercepted arc and half the measure of the central angle intersecting the same arc. Inscribed angles that intercept the same arc are congruent. (1:44)

Angles in Semicircles

If an angle is inscribed in a semicircle, it will be half the measure of a semicircle (180 degrees), therefore measuring 90 degrees. This video describes how angles in a semicircle can be used to find missing missing angles and lengths. Pythagorean's theorem can be used to find missing lengths (remember that the diameter is the hypotenuse). Also, the measure of an angle formed by a chord to a tangent is half the intercepted arc. (2:08)

Pi Mathematical Pi Song (Full Version)

This Is The Full Version Of The Pi Pi Mathematical Pi Song! Written by Antoni Chan and Ken Ferrier. Note, this is not mine.

PI Song (Each and Every Time)

Video is a song about pi.Â It talks about who discovered it and what it measures.

Lose Yourself in the Digits - Song

This music video is to the tune of Eminem's "Lose Yourself" and teaches about the concept of Pi. Lyrics are not included on the screen but can be found at www.teachpi.org. The lyrics in the chorus are, "You better lose yourself in the digits of pi. It's a high but you got a thousand more to go. The numbers do not stop or drop into pattern, no. To memorize it would take most of a lifetime." (04:26)

How to Understand Pi

How to Understand Pi - This tutorial will help the viewer understand the concept of Pi. (02:52)

Congruent Figures

A teacher narrates a slide show explaining what makes two figures congruent.

Redefining the Wall: Architecture, Materials and Macroelectronics

As a principle element of architecture, technology has allowed for the wall to become an increasingly dynamic component of the built environment. The traditional connotations and objectives related to the wall are being redefined: static becomes fluid, opaque becomes transparent, barrier becomes filter and boundary becomes borderless. Combining smart materials, intelligent systems, engineering, and art can create a component that does not just support and define but significantly enhances the ar

Summer 2012 Graduation

Graduating from university is a special experience - students, parents and staff talk about their feelings at The University of Nottingham's summer 2012 Graduation.

Electrodialysis is an electrochemical process in which ion transfer separates salt from water. It is effective only for substances that can be ionized: for example, salt (NaCl) becomes, in solution, a mixture of Na^{+} and Cl^{âˆ’} ions. (Silica, on the other hand, does not ionize and hence is not removed by electrodialysis. It could, however, be removed by reverse osmosis.) When electrodes, connected to a suitable direct current supply, are immersed in a salt solution, curren

10 Managing the BSE/vCJD episode from March 1996

In March 1996, SEAC announced that the CJD Surveillance Unit had identified vCJD as a new human disease, the first death from which occurred in May 1995. SEAC concluded that, although there was no direct evidence of a link, the most likely explanation for vCJD was exposure to BSE before the SBO ban was introduced in 1989. At the time, the strongest evidence for the link was that vCJD was a *new* TSE in humans (the symptoms of which differed from previously known human TSEs) that had aris

Martin Luther Sparks a Revolution

This three minute video explains the German monk's questioning of Catholic dogma that leads to the Protestant Reformation though his questioning of the values of the Catholic Church and its sale of indulgent behavior. A good biography.