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Some web apps offer free PDF editing and annotation tools. The Free Software Foundation was "developing a free, high-quality and fully functional set of libraries and programs that implement the PDF file format and associated technologies to the ISO 32000 standard", as one of its high priority projects.
Concrete (Beton, 1982) is a novel by Austrian writer Thomas Bernhard. [ 1 ] Like many of Bernhard’s books, Concrete is written in the form of a monologue —essentially a rant lasting for 150 pages with no chapter breaks or even separate paragraphs—by Rudolf, a Viennese amateur musicologist and convalescent.
Whole language is a philosophy of reading and a discredited [8] educational method originally developed for teaching literacy in English to young children. The method became a major model for education in the United States, Canada, New Zealand, and the UK in the 1980s and 1990s, [7] despite there being no scientific support for the method's effectiveness. [9]
Concrete Mathematics: A Foundation for Computer Science, by Ronald Graham, Donald Knuth, and Oren Patashnik, first published in 1989, is a textbook that is widely used in computer-science departments as a substantive but light-hearted treatment of the analysis of algorithms.
Concrete is a composite material composed of aggregate bonded together with a fluid cement that cures to a solid over time. Concrete is the second-most-used substance in the world after water, [1] and is the most widely used building material. [2] Its usage worldwide, ton for ton, is twice that of steel, wood, plastics, and aluminium combined. [3]
Concrete has a very low coefficient of thermal expansion, and as it matures concrete shrinks. All concrete structures will crack to some extent, due to shrinkage and tension. Concrete which is subjected to long-duration forces is prone to creep. The density of concrete varies, but is around 2,400 kilograms per cubic metre (150 lb/cu ft). [1]
Yes! You can take your email on the go with an iOS & Android app.
In philosophy and the arts, a fundamental distinction exists between abstract and concrete entities. While there is no universally accepted definition, common examples illustrate the difference: numbers , sets , and ideas are typically classified as abstract objects, whereas plants , dogs , and planets are considered concrete objects.