The Metaphor of Networks in Learning: Communities, Collaboration and Practice
This paper explores the use of the network metaphor and the way in which it relates to Computer Supported Collaborative Learning (CSCL) and Communities of Practice. The idea of networked learning stresses the interactopn of learners, tutors and their resources through networks. The arguments put in this article are firstly that learning technology needs to take account of the wider debate about networks and secondly that research in this field needs to address the theoretical and practical issue
Author(s): Jones Chris,Esnault Liliane

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Re-engineering of collaborative e-learning systems: evaluation of system, collaboration and acquired
This paper relates an experimentation of a collaborative e-learning system. In this kind of system, tracks arising from communication tools allow to build useful indicators for all system actors. We show how tracks are analyzed and how this analysis is useful for reengineering purposes.
Author(s): Barré Vincent,El-Kechaï Hassina,Choquet Christop

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Methods of presetting material
Presetting involves bending the ends of material before it is formed into a cylindrical or conical shape. Presetting is important because it ensures the product will be uniform in shape and will have a smooth transition at the seams. When a cylinder is made using pyramid rolls, the ends remain flat. This is because when the material passes through the rollers, it doesn't start to bend until after it gets to the last roller on the machine. The extra material is cut off to ensure a smooth join.
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FOAMCARP closed cell aluminium foam
Additions such as SiC are made to molten aluminium or aluminium alloy to modify the melt viscosity and make it suitable for foaming. Calcium carbonate is then added to the melt which is solidified to form a precursor which can be foamed in a controlled manner by a subsequent heat treatment. The resulting foam has a fine and relatively uniform cell structure.
Author(s): D C Curran, Department of Materials Science and Me

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FORMGRIP closed cell aluminium foam
Additions such as SiC are made to molten aluminium or aluminium alloy to modify the melt viscosity and make it suitable for foaming. 1 to 3 wt% of pre-oxidised titanium hydride is then added to the melt which is solidified to form a precursor which can be foamed in a controlled manner by a subsequent heat treatment. The resulting foam has a relatively fine and uniform cell structure.
Author(s): Dr V Gergely, Department of Materials Science and

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Austenitic stainless steel
This is a transmission electron micrograph taken at 200 kV, from a thin foil sample of "302AA" austenitic stainless steel. The sample was cold-deformed by rolling and then annealed at 704 °C for one hour. The image shows recrystallised grains which which show uniform contrast because they are relatively free of dislocations, surrounded by a deformed matrix which has a high dislocation density. The recrystallised grain contains annealing twins (parallel bands with different contrast. The steps a
Author(s): Prof H K D H Bhadeshia, Department of Materials Sc

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Uniform Estimate Experiment
This resource consists of a Java applet and expository text. The applet simulates a random sample from the uniform distribution on the interval [0,a], and computes standard point estimates of a. The bias and mean square error are also computed.
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Advances in nanotechnology
In this podcast, Professor Moriarty discusses nanotechnology, and how it has led to a convergence of the traditional sciences. He talks about the commercial applications of nanotechnology such as hard disk technology in laptops, stain free materials and fabrics, self-cleaning windows and advanced water filtration. He also touches on some of the myths about nanotechnology as well as some of the real dangers of Nanotechnology and the steps governments are taking to regulate it. Professor Moriarty
Author(s): Moriarty Philip Professor

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Coarse open celled aluminium foam produced by infiltration of sintered salt (FOAM-U-LIKE)
FOAM-U-LIKE (Foaming of aluminium metal using lightly interconnected kevelled elements) is a very inexpensive route for the production of coarse open celled foams. It allows a reasonable degree of control over cell size and shape, and results in relatively uniform morphology. The interconnectivity of pores can be controlled by varying the degree of sintering of the precursor. In this case, grains of 1-4mm diameter have been sintered at 600 degrees C for just 10 minutes, giving rise to lightly in
Author(s): J A Curran, Department of Materials Science and Me

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Birefringence in a film of polyethylene
The colours in the image are the result of birefringence and relate to the residual stress in the film. The colour is generally uniform (with some contrast where an additional thickness of film exists or where wrinkling has resulted in a different apparent thickness). This is indicative of both a uniform film thickness and of the uniformity of the drawing process used to make the film. In the region of the tear, however, the colours indicate strain-induced orientation: because the material is ab
Author(s): J A Curran, Department of Materials Science and Me

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Bivariate Uniform Experiment
This resource consists of a Java applet and expository text. The Java applet illustrates the bivariate uniform distribution on three types of regions: a square, a circle, and a triangle. Simulated points from the distribution are shown as dots in a scatterplot.
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Voter Experiment
This resource consists of a Java applet and expository text. The applet is a simulation of the voter experiment, an interacting partile system that consists of a rectangular array of sites. At each discrete time unit, a site is chosen at random, a neighboring site is chosen, and the color of the first site is changed to that of the neighbor. The applet illustrates clustering of the colors and convergence to consensus.
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Uniform Estimate Experiment
This resource consists of a Java applet and expository text. The applet simulates a random sample from the uniform distribution on the interval [0,a], and computes standard point estimates of a. The bias and mean square error are also computed.
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Shinzo Abe and the Three Magic Arrows
Shinzo Abe’s so-called “three arrows” of monetary stimulus, fiscal stimulus, and structural reform, have crippled the Japanese economy, writes Andy Sirkis. This audio Mises Daily is narrated by Keith Hocker.

Digital Libraries and Archives, Winter 2009
This course focuses on the current state of "digital libraries" from a multidisciplinary perspective. Its point of departure is the possibilities and prospects for convergence of professions and cultures around the notion of digital media and content. The course covers the history of the idea of the digital library and the digital archive, especially its manifestation as projects and programs in academic, nonprofit, and research settings, and the suite of policy issues that influence the develop
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American Revolution: The World Turned Upside Down
(Episode 5 of the series Liberty, by PBS) When the war in the North was fought to a stalemate, Sir Henry
Clinton thought his troops could defeat the rebellion in the American
South.  Perhaps, with people still loyal to the British Crown, the long
and costly war could finally end in Britain's favor.
After the fall of South Carolina, Clinton's strategy seemed to be
working very well.  He sent Lord Cornwallis to complete the job.  But

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Pomona College campus
View of Pomona College buildings with mountains behind; taken from Third Street [now Bonita Avenue] near the corner with Harvard Avenue. Pearsons Hall is on the far left. Holmes Hall is left of center in the distance. The backside of the Pomona College president's house on College Avenue can be seen right of center in the foreground. Sumner Hall is to the right (partially obscured).
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For more information on copyright or permissions for this image, please contact Honnold Mudd Library Special Collections at http://libraries.claremont.edu/sc

Jeremy Siegel: Interest Rates Look Stable, but Beware the China Bubble
The U.S. economy may be getting stronger, but that doesn't mean interest rates will go up when the Federal Reserve meets next week on January 31. According to Wharton finance professor Jeremy Siegel, interest rates should hold firm at their current level for quite a while, and "the big question for the market is whether there will be any drops at all this year." He believes there is "a balance in the economy between strength and moderate inflation," and the Fed is unlikely to move interest rates
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22 - Paradise XXVII, XXVIII, XXIX
This lecture focuses on Paradiso 27-29. St Peter's invective against the papacy from the heaven of the fixed stars is juxtaposed with Dante's portrayal of its contemporary incumbent, Boniface VIII, in the corresponding canto of Inferno. Recalls of infernal characters proliferate as the pilgrim ascends with Beatrice into the Primum Mobile. Bid to look back on the world below, Dante perceives the mad track of his uneasy archetype, Ulysses. Dante's remembrance of this tragic shipwreck at the ve
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Alternative Models Of Differential Pricing For Medicines
Each speaker on this panel proposes a unique approach to the problem of making medicines universally affordable. Dr. David Meeker works in the area of rare diseases. Genzyme’s hormone replacement therapy for Gaucher disease, which affects roughly 30 thousand globally, costs $150k to $200k per year. For patients in natio
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