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The basic design of how graphics are represented in PDF is very similar to that of PostScript, except for the use of transparency, which was added in PDF 1.4. PDF graphics use a device-independent Cartesian coordinate system to describe the surface of a page. A PDF page description can use a matrix to scale, rotate, or skew graphical
You may want to use archives if you want to: 1) do research that goes beyond published material on certain histories, or 2) verify published content through original sources. For general reading or research based on published sources, books and articles may be a better first step. They are often easier to access and tend to provide more ...
A material is a substance or mixture of substances that constitutes an object. Materials can be pure or impure, living or non-living matter. Materials can be classified on the basis of their physical and chemical properties, or on their geological origin or biological function.
National, State & Local Newspaper Archives - Collection of free newspaper archives in the United States, from the XooxleAnswers professional online research service. The History Guide - Material for high school (particularly AP European History) and undergraduate students. Includes lectures on Ancient and Medieval European History, Early Modern ...
Some professional organizations have encouraged use of open access: in 2001, the International Mathematical Union communicated to its members that "Open access to the mathematical literature is an important goal" and encouraged them to "[make] available electronically as much of our own work as feasible" to "[enlarge] the reservoir of freely ...
A metamaterial (from the Greek word μετά meta, meaning "beyond" or "after", and the Latin word materia, meaning "matter" or "material") is a type of material engineered to have a property, typically rarely observed in naturally occurring materials, that is derived not from the properties of the base materials but from their newly designed ...
Research data archiving is the long-term storage of scholarly research data, including the natural sciences, social sciences, and life sciences.The various academic journals have differing policies regarding how much of their data and methods researchers are required to store in a public archive, and what is actually archived varies widely between different disciplines.
One of the lesser known, but extremely useful, techniques for researching with Wikipedia is the effective use of the "What links here" link which (for most current skins) appears on the right side of the screen, as the first item in the box marked "General". This will give you a complete list of other Wikipedia articles which link to the ...