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Viewing articles in PROLAHelp is available on the following topics: There are several different deliverable versions of the articles in PROLA. Each has its advantages and disadvantages. Page ImagesThe heart of PROLA is its archive of scanned page images. There are over 1,000,000 pages that have been scanned and stored as TIFF's. Material in the 1985-1995 volumes for Phys. Rev. were scanned at 300 dpi, while pre-1984 Phys. Rev. and all Rev. Mod. Phys. material have been done at 600 dpi. Over the next year, we will be redoing all of the 300 dpi material at 600 dpi. High resolution TIFF's aren't always well-suited for online viewing, so the images are converted to 100 dpi GIF's for this purpose. Small 10 dpi "thumbnail" images are used to help guide you to a page of interest, i.e., a page with a figure or table that you are interested in. The "Page images" links go to a page of thumbnails for the article. Clicking on a thumbnail downloads the corresponding GIF for the page. The GIF's average about 90 kB in size and should be directly viewable in your browser. Printing out a GIF will result in a poor quality image because their 100 dpi resolution is well below that of the standard printer. Use the page images if you just want to page through an article on your screen. The TIFF's are also converted directly into Adobe's Portable Document Format, PDF. Because the PDF is produced from scanned images, you won't be able to search the PDF for words as you may be accustomed to doing with our other electronic offerings. The PDF deliverable is best for printing. Articles more recent than July, 1996 are available as PDF's produced directly from the PostScript used in our print production. These PDF's are considerably smaller than if they had been scanned and are searchable. If you can't find the answer to your question in the help, please send e-mail to prola@aps.org. |
