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5.1 Arithmetic operations
This unit will help you to understand the forms of data that are handled by software and look at the various processes that can be applied to the data. These ideas are demonstrated through the use of a supermarket till and illustrate how simple data sets can be manipulated.
Author(s): The Open University

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Except for third party materials and otherwise stated (see http://www.open.ac.uk/conditions terms and conditions), this content is made available under a http://creativecommons.org/licenses/by-nc-sa/2

Christians and the Holocaust: Get involved today
Yad Vashem is so much more than a Holocaust Memorial. It is an educational institute that seeks to educate about the Holocaust and anti-Semitism and related themes. Holocaust was the murder of 6 million Jews by Nazis and their collaborators. Many factors contributed to the mass murder including centuries of Christian anti-Semitism in Europe. Today Yad Vashem reaches out to Christians worldwide through educational programs and invites them to join the Christian Friends of Yad Vashem. http://www.
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Sea of Steps, Wells Cathedral AA66_00136

WELLS CATHEDRAL, Wells, Somerset. Interior view. The 'Sea of Steps'. Photographed by Herbert Felton in 1948.


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L'eau dans le monde - Johnny Douvinet (audio)

Une conférence de l'UTLS au Lycée

L'eau dans le monde par Johnny Douvinet (géographe et géomorphologue)

CFA BTP (13 Aix les Milles)


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Earth Day Network
Every spring, get ready for Earth Day with a visit to the official Web site of the Earth Day Network Web site, "an alliance of 5,000 groups in 184 countries working to promote a healthy environment and a peaceful, just, sustainable world." The Web site contains a wealth of information and resources designed to increase public awareness of important environmental issues and provide opportunities for individuals and communities to get involved. Visitors may read about current Earth Day Network cam
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Marine Invertebrate Larvae: A Study in Morphological Diversity
In this Web site, courtesy of Dr. Thurston Lacalli of the University of Saskatchewan, visitors will find an excellent collection of marine invertebrate larvae images. Consisting mainly of transmission electron micrographs, the image gallery may be accessed through a graphical or text-only menu. The phylogenetic tree layout of the graphical menu helps familiarize visitors with invertebrate classification. Lacalli also provides a brief tutorial intended for students new to the topic, which address
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Women in Science and Mathematics
Recent comments by Harvard University President Lawrence H. Summers, regarding women and mathematics have spurred numerous articles and responses. The first article from Yahoo News (1) gives an overview of the event, his comments, and some reactions. The comment most at issue is whether or not innate sex differences might leave women less capable of succeeding at the most advanced mathematics. The second website (2) offers Summers’ apology and clarifies his comments. The third article (3), alth
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Prime Curios!
The University of Tennessee at Martin has one of the most expansive sites devoted to prime numbers and their significance. This page "is an exciting collection of curiosities, wonders and trivia related to prime numbers." As of December 2002, there are nearly 2,000 numbers with at least one curio. Some of the smallest numbers are interesting to peruse; however, reading every curio or researching other numbers to submit to the database is probably left to the mathematicians. One thing is certain,
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Mammoth Extinction
Science Netlinks offers this Web-based lesson plan for grades 9-12. The lesson invites students to explore various hypotheses regarding the extinction of the woolly mammoth, with a particular focus on infectious disease. Students use provided worksheets to conduct online research on the topic, focusing on a 1998 American Museum of Natural History expedition to the Arctic circle to hunt for mammoth fossils. In addition to learning about the woolly mammoth and other large mammals that became extin
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Fear of Physics
The Fear of Physics Web site contains more than twenty interactive physics related activities. Everything from things that spin, sound, atoms, collisions, and the Doppler effect are included. The Speed and Acceleration link teaches about movement by allowing users to choose two vehicles and change their position, speed, and acceleration. After pressing the GO button, the program runs, and students get to see how the chosen variables affect the vehicles' movements. A great collection of online le
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Semiactive Damping of Cables with Sag
Vibrations in support cables can be caused by wind, rain, or other forces acting on the attached structure. This can result in premature failure of the cable or its connections, thereby reducing the cable's useful lifetime. This research paper, from the University of Southern California civil engineering department, extends the previous work of the authors on smart vibration damping techniques. Through accurate modeling of the cable and including the properties of "sag, inclination, and axial fl
Author(s): Christenson, R.E.,Johnson, E.A.,Spencer, B.F.

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MIT Media Lab: Software Agents [pdf, Microsoft Word, QuickTime, Macromedia Flash Player,
The Software Agents Group of the MIT Media Laboratory "investigates computer systems to which one can delegate tasks." Software agents are different from conventional software because they are "long-lived, semi-autonomous, proactive, and adaptive." Software Agents Group focuses on creating software that "acts as an assistant to the user rather than a tool, learning from interaction and proactively anticipating the user's needs." The website describes their various projects that use "commonsense
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Astronomical Society of Victoria
The Astronomical Society of Victoria website promotes its efforts to act as a forum for a wide variety of people interested in astronomy. Users can find learn about the monthly meetings open to the public. The website introduces the Society's many sections including Computing, Cosmology and Astrophysics, Current Phenomena, and Radio Astronomy. The Newcomers link furnishes helpful lists of astronomy books, magazines, and computer software. Everyone will enjoy the fantastic images of the Great Ori
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The Right-To-Know Network
The Right-To-Know Network (RTK NET) "provides free access to numerous databases, text files, and conferences on the environment." The databases of interest to those involved in the physical sciences include the Toxic Release Inventory (TRI); Biennial Reporting System (BRS); Comprehensive Environmental Response, Compensation, and Liability Information System (CERCLIS); and the Accident Release Information Program (ARIP). Users can find factsheets and links about the databases as well as related s
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Chaos Lab: An Orderly Pursuit of Disorder
Chaos Lab is a great piece of software that teaches users about fractals and chaos theory. The menu-driven interface is extremely easy to use; however, a significant drawback of the software is its poor documentation. This can make experimenting with the settings more fun, but it would be helpful to have better explanations of the more obscure functions. What Chaos Lab lacks in documentation, it makes up for in the remarkable visual representations of famous fractals. The Mandelbrot and Julia se
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BSA: Global Software Piracy Study
The Business Software Alliance published its eighth annual Global Software Piracy Study in June 2003, which reflects the spread of illegal copyrighted software distribution in many countries around the world. The study's homepage features regional highlights that summarize piracy rate trends, while the study itself can be viewed by following the easily overlooked link on the right side of the page. In addition to providing statistics for over 90 countries in 2002, the document also includes hist
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21st International Conference on Yeast Genetics and Molecular Biology
This Web site presents abstracts submitted for the plenary and poster sessions of the International Conference on Yeast Genetics and Molecular Biology in Göteborg, Sweden (July 7-12th, 2003). These abstracts are available though the _Saccharomyces_ Genome Database (SGD) at the Department of Genetics at the School of Medicine, Stanford University. Users may easily browse or search the material, or follow links to find out more about SGD and the upcoming conference.
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Beat the Heat at Arizona Science Center
TryScience.com offers an unique energy learning activity called Beat the Heat. This fun and interactive lesson lets users design a house in a particular location and test it in various seasons to best utilize the heat of the sun for energy efficiency. You can choose various types of roofs, windows, solar panels, skylights, and plants, as well as the direction your house faces, to see how each of these variables effects your home's efficiency. This in-depth and intriguing exercise teaches some ve
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National Geographic: Forces of Nature
This National Geographic offers entertaining Macromedia Flash Player enhanced tutorials about natural disasters. Students can make their own earthquake, discover why a volcano erupts, build a tropical cyclone, find out the characteristics of a tornado, and more. The website offers facts on historically large events as well as key information about earthquakes, volcanoes, tornados, and hurricanes. The simple glossary helps users understand the scientific terms presented throughout the modules. Ed
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