Low magnification SEM image of open cell polyurethane foam
If a gas is injected into a liquid it forms a cellular foam structure. When a thermoset prepolymer of low viscosity is foamed, the polymer can drain from the cell walls (driven by surface tension) before it sets at the cell edges, leaving an open-celled foam. The cell edges have three concave sides, giving rise to the tri-cuspid cross section visible at the bottom of this image. The average co-ordination number for the nodes (where struts meet) is four, giving tetrahedral junctions.
Author(s): DoITPoMS, University of Cambridge,Dr J A Elliott,

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Alporas' closed cell aluminium foam
Additions are made to molten aluminium or aluminium alloy to modify the melt viscosity and make it suitable for foaming. 1 to 3 wt% titanium hydride is then added to the melt, and this foams the melt by releasing hydrogen. The foamed melt solidifies to yield a closed cellular structure with an average cell size of 4.5 mm
Author(s): DoITPoMS, University of Cambridge,Dr V Gergely, De

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Cory Doctorow on Why it's a Bad Idea to Regulate Computers
Big Ideas presents Cory Doctorow on Why it's a Bad Idea to Regulate Computers the Way We Regulate Radios, Guns, Uranium and Other Special-Purpose Tools
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Bianca Goes Where the Wind Blows
In this segment from Cyberchase, Bianca gives her niece Mikaela a kite for her birthday. Bianca is determined to find the best place to fly it. To help with their search, Bianca creates a wind gauge that measures how hard the wind blows. After taking wind gauge readings in different spots around the park, they are able to find a spot where the kite soars beautifully. (03:31)
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Economic Update: There Are Alternatives
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Wine Rules: Tiny bubbles in the New Year
Dec. 27 - In this New Year's episode of Wine Rules, Food and Wine's Executive Wine Editor, Ray Isle, counts down with three stand-out sparkling wines.
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πού είναι ο άρης (1)π,α,πα, σελ10

http://taksiasterati.blogspot.gr/

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{Suresh 310} हिंदी शब्द – (Hindi shabd)-  Hindi words परिक्रमा ( parikrama) circle लबादा ( labaada) cloak पेचीदा ( pecheeda) complex नियोग ( niyog ) mission शर्मीली  ( sharmeelee) shy... Related posts:

  1. {Suresh 216} : Vocabula
    Author(s): podcast@ISpeakHindi.com (ISpeakHindi.com)

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Simple Subtraction From 4 Song "Elmo Has 4 Ducks" - Sesame Street
In this video snippet from "Sesame Street", Elmo sings about his 4 ducks. During each verse of the song, one duck at a time leaves, allowing the viewer to tell how many ducks are left. This would be a great song for introducing subtraction to very young children. (2:04)
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Chinese Grammar-Complement 结果补语.
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"Eden Rock" by Charley Causley (poetry reading)
A projection of the afterlife, drawn from idyllic memories of childhood. He pictures his parents as they used to be when he was a child. Most parents take photographs and videos of their children to provide lasting memories to treasure in later years. But very few take pictures of themselves - and it is pictures of the parents that the children will want to see: that is what THEY saw at the time. Women grow conscious of the toll taken by passing years and become more and more reluctant
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1.2 The origins of coal

If you examine a piece of coal, at first sight it appears black and rather homogenous. However, closer inspection generally shows a series of parallel bands up to a few millimetres thick. Most obvious are shiny bands that break into angular pieces if struck. Between them are layers of dull, relatively hard coal and thin weak layers of charcoal-like carbon. Coal splits easily along these weak layers, which crumble to give coal its characteristic dusty black coating.

Microscopic examinati
Author(s): The Open University

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2.3.4 Geophysical methods — borehole logging

If a core is not recovered from a borehole, another way to assess the types of rock that it penetrates is to measure their physical properties. Mounting a string of electronic instruments behind the drill bit most conveniently does this: it allows the properties of the rock to be monitored as the borehole is drilled. An alternative is to lower instruments down the completed borehole by cable; hence the name wireline logging.

Such logging measures several physical properties of th
Author(s): The Open University

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Experimentación en Química Orgánica Avanzada (2008)
Con esta asignatura se pretende completar la formación práctica en Química Orgánica iniciada en la asignatura de tercer curso de la Licenciatura de Química; por ello se incluyen procedimientos de reacción más complejos que los utilizados en aquel curso, técnicas espectroscópicas para la determinación de estructuras, síntesis estereoselectivas, reacciones de Química verde y mediante el uso de microondas, y obtención de materiales poliméricos. El objetivo es que el alumno aprenda t
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Quantitative Reasoning and Statistical Method for Planning I, Spring 2006
This course develops logical, empirically based arguments using statistical techniques and analytic methods. It covers elementary statistics, probability, and other types of quantitative reasoning useful for description, estimation, comparison, and explanation. Emphasis is placed on the use and limitations of analytical techniques in planning practice. This course is required for and restricted to first-year M.C.P. students.
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Words In Action: FRENCH - Four poems by 19th and 20th century poets
Words In Action: FRENCH Four poems by 19th and 20th century poets Conte de fées by Robert Desnos Performed by Sasha Helton Il pleure dans mon coeur by Paul Verlaine Performed by Trevor Jackson Sensation by Arthur Rimbaud Performed by Clara Mathews Le Cancre by Jacques Prévert Performed by Marisa Palucis Words In Action - A MULTILINGUAL STUDENT PERFORMANCE CELEBRATING LINGUISTIC DIVERSITY AT UC BERKELEY Chevron Auditorium -- International House Wednesday, April 25, 2012 Words In Action is g
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"Ausleihdaten aus Bibliotheken als Linked Open Data publizieren und nutzen" Magnus Pfeffer (Hochschu
By: SWIB In einem laufenden Projekt untersuche ich gemeinsam mit Kai Eckert von der UB Mannheim und Studierenden an der Hochschule der Medien mögliche Anwendungsfälle für Ausleihdaten aus Bibliothekssystemen als Linked Data. Das erste Szenario ist der statistische Vergleich von (Teil-)Bibliotheken. Hierbei muss die Beschreibung der Bibliotheken, ihres Bestanded und der Ausleihbedingungen als Vokabular modelliert werden. Dieses Vokabular und seine Semantik muss sich an den vorhandenen Standar
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When teaching a child with dyslexia to spell, it's important to understand that these children view words differently from others. Learn about breaking down words into components to help teach spelling with help from a state-certified teacher in this video on teaching spelling to dyslexic children. (01:32)

Expert: Ileana Padilla-Boyd
Contact: www.brightstartstutoring.com
Bio: Ileana Padilla-Boyd is the director of Bright Starts, an education service in south Florida.

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Purple Color Song - Jessica Ferrell
This song and slide show focuses on the color purple. The song is to the tune of "Camptown Races" and shows the word purple and items that are purple. (00:36)
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Word Family Song -op - Sesame Street
This word family song focuses on rhyming words ending in -op and is sung by two Muppets. Muppets demonstrate how to blend the initial consonant with the ending -op to create words. Classic Sesame Street. (2:17)
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