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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 ...
Papercrete is a building material that consists of re-pulped paper fiber combined with Portland cement or clay, as well as other soils. First patented in 1928 by Eric Patterson and Mike McCain [ 1 ] (who originally named it "padobe" and "fibrous cement"), it was revived during the 1980s.
A paper conservator surveying a collection of materials in storage. Storage in a cool, dry, clean, and stable location can extend the life of an item. [51] Manuscripts and paper documents are often stored in protective archival-quality boxes and folders, made of acid-free and lignin-free materials. [52]
For example, a paper reviewing existing research, a review article, monograph, or textbook is often better than a primary research paper. When relying on primary sources, extreme caution is advised. Wikipedians should never interpret the content of primary sources for themselves (see Wikipedia:No original research and Wikipedia:Neutral point of ...
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 ...
Any material challenged or likely to be challenged must be supported by a reliable source. Material for which no reliable source can be found is considered original research. The only way you can show that your edit is not original research is to cite a reliable published source that contains the same material.
Citation of Wikipedia in research papers has been known to result in a failing grade. [2] [3] [4] This does not mean Wikipedia is not useful: Wikipedia articles contain many links to newspaper articles, books (often with ISBN numbers), radio programming, television shows, Web