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Regional Night: Asian Hip-Hop
Thunderbird students perform Dec. 8, 2012.
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C++ and Beyond 2012: Andrei Alexandrescu - Systematic Error Handling in C++ | Going Deep

Andrei Alexandrescu presents "Systematic Error Handling in C++". This was filmed at C++ and Beyond 2012

Abstract:

Writing code that is resilient upon errors (API failures, exceptions, invalid memory access, and more) has always been a pain poi
Author(s): Charles

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Site Libre Savoirs: L’agroécologie : une perspective pour nos recherches ?
Domaine: Sciences de la vie et ingénierie du vivant
Le regroupement d’équipes de recherche dans le cadre du plan campus à Saclay concerne un très grand nombre de disciplines qui couvrent un champ très vaste (dans le périmètre de SIVAAE : du changement climatique aux sciences sociales en passant par l’écologie théorique, l’agronomie et les sciences de l’environnement). Ce rassemblement est une opportunité pour constituer un collectif autour de programmes de recherche pluridisc

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11.12.2012 – Langsam gesprochene Nachrichten
Trainiere dein Hörverstehen mit den Nachrichten der Deutschen Welle von Dienstag – als Text und als verständlich gesprochene Audio-Datei. *** Im Syrien-Konflikt setzt die Europäische Union auf eine Stärkung des Oppositionsbündnisses Syrische Nationale Koalition. Die EU-Außenminister erkannten das Bündnis als "legitimen Vertreter" der syrischen Bevölkerung an. Diese Formulierung sei stärker als jene vom November, sagten Diplomaten. Damals hatten die Minister die Koalition als "legit
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Life in the Wilderness

A fascinating insight into life in the New Zealand bush, and what it is like to have lived there all your life - no cars, no schools, no TVs or computers, and sometimes without seeing anyone else for months.

read more


Author(s): EduTube

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Sarah Kruzan: Life in Prison Without Parole at Age 16

In the USA juveniles can be sentenced to life in prison. Sarah Kruzan's unfortunate childhood led her to commit murder - does she deserve a second chance at life?


Author(s): harvey

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McIntosh County Shouters: Gullah-Geechee Ring Shout from Georgia
The McIntosh County Shouters perform Gullah-Geechee Ring Shout at a concert at the Library. Speaker Biography: The McIntosh County Shouters is a ten-member Gullah-Geechee group that began performing professionally in 1980. They have educated and entertained audiences around the United States with the "ring shout," a compelling fusion of counterclockwise dance-like movement, call-and-response singing, and percussion consisting of hand claps and a stick beating the rhythm on a wooden floor. Afric
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Rekenzinnen tot honderdduizend : Vier op een rij
vier_op_een_rij.JPG

Via dit spel herhalen leerlingen de getallenkennis tot honderdduizend. Tijdens het spel moeten de leerlingen rekenzinnen aanvullen. Bijvoorbeeld: 89 799 komt net voor …

Hoe speel je het spel?
De spelers kiezen ieder een …


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Music Visualization using Independent Component Analysis
Rene Castro
Elec 301 Project on Music Visualization Using Independent Component Analysis
Some Rights Reserved

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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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Hello Panwapa Island!
A young curious monster named Azibo arrives on Panwapa Island, eager to make friends. But some of the animals that live on the island have never known a monster before-and they don't want to start now. If you would like to add more questions or share ideas about how you use Panwapa with your students, create or join a Panwapa group using Curriki's group tools. (Under the Member Community tab in the navigation bar on the left, click "browse groups" or "create a new group.") Run time 10:34.
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Keith Devlin on Leonardo and Steve: How Fibonacci Beat Apple
Keith Devlin, Executive Director of the H-STAR Institute at Stanford University, discusses Leonardo and Steve: How Fibonacci Beat Apple to Market by 800 Years
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Market Pulse: 12/12/12, a red letter day for Greek bonds
It's perhaps fitting that today Greek bond yields have a 12% handle for the first time since April last year. And is 88 years enough for progress on the "fiscal cliff" talks?
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Artists at Google: Mayday 五月天
Talks at Google welcomed Mayday to Google headquarter in Mountain View, California for an exclusive talk to discuss their work and how they're reaching fans across borders. Google+ Global Marketing Director Marvin Chow interviewed Mayday on November 28th, 2012. Mayday also held a concert, live streamed around the world, later that night for YouTube Presents. Watch their exciting performance here: http://www.youtube.com/watch?v=ZUXVS4ILYBY Mayday An influential rock band from Taiwan. With footp
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5 Summary

  1. Eutrophication is a process in which an ecosystem accumulates mineral nutrients. It can occur naturally, but is usually associated with human activity that releases nutrients into the environment.

  2. Anthropogenic eutrophication has caused a widespread loss of biodiversity in many systems. Recent attempts to reverse the process are proving difficult and expensive.

  3. Symptoms of eutrophication are most readily seen in aquatic sys
    Author(s): The Open University

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4.4 Reducing nutrient availability

Once nutrients are in an ecosystem, it is usually much harder and more expensive to remove them than tackle the eutrophication at source. The main methods available are:

  • precipitation (e.g. treatment with a solution of aluminium or ferrous salt to precipitate phosphates);

  • removal of nutrient-enriched sediments, for example by mud pumping; and

  • removal of biomass (e.g. harvesting of common reed) and using it for thatchi
    Author(s): The Open University

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4.3.5 Domestic campaigns

An important aspect of efforts to reduce nutrient inputs to water bodies is the modification of domestic behaviour. Public campaigns in Australia have encouraged people to:

  • wash vehicles on porous surfaces away from drains or gutters

  • reduce use of fertilizers on lawns and gardens

  • compost garden and food waste

  • use zero- or low-phosphorus detergents

  • wash only full loads in washing machi
    Author(s): The Open University

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4.3.4 Wetlands

Wetlands can be used in a similar way to buffer strips as a pollution control mechanism. They often present a relatively cost-effective and practical option for treatment, particularly in environmentally sensitive areas where large waste-water treatment plants are not acceptable. For example, Lake Manzala in Egypt has been suffering from severe pollution problems for several years. This lake is located on the northeastern edge of the Nile Delta, between Damietta and Port Said. Land reclamatio
Author(s): The Open University

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4.3 Reducing the nutrient source

Europe is the continent that has suffered most from eutrophication, and increasing efforts are being made to restore European water bodies damaged by nutrient enrichment. If the ultimate goal is to restore sites where nature conservation interest has been damaged by eutrophication, techniques are required for reducing external loadings of nutrients into ecosystems.

Although algal production requires both nitrogen and phosphorus supplies, it is usually sufficient to reduce only one major
Author(s): The Open University

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2.4.2 Saltmarshes

Marsh plant primary production is generally nitrogen limited, so saltmarsh vegetation responds readily to the artificial eutrophication that is now so common in nearshore waters. Eutrophication causes marked changes in plant communities in saltmarshes, just as it does in freshwater aquatic and terrestrial systems. Biomass production increases markedly as levels of eutrophication increase. Increases in the nitrogen content of plants cause dramatic changes in populations of marsh plant consumer
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