William C. Bruce Associate Dean and Professor College of Education and Psychology Phone: (903) 566-7048 e-mail: wbruce@uttyler.edu http://www.hometreemedia.org Fax: (903) 566-7036 Go back to main Concept Attainment Lesson Home Tree Media DISCLAIMERS Brief History of PDF Adapted from The Library of Congress and PDF Reference, Third Edition: The origins of PDF and the Adobe Acrobat product family date to early 1990. At that time, the PostScript page description language was rapidly becoming the worldwide standard for the production of the printed page. PDF builds on the PostScript page description language by layering a document structure and interactive navigation features on PostScript's underlying imaging model providing a convenient, efficient mechanism enabling documents to be reliably viewed and printed anywhere. Have you ever wondered how some of your word processing files end up with errors and inconsistencies when you change them to PDF files? How do your words and sentences get transposed and new editing degenerates, at times, back to the older versions of your word processing? The digital world is wonderful. However, inaccuracies occur and reoccur with the changing of word processing files and PDF files. The following is our interpretation from The Library of Congress and Adobe: File integrations, conversions, structural tagging, binary formatting, encryption corruption, and configuration changes of one operating system to a different operating system, and communication network changes can cause fragment identifier breakdowns in document decryption. Due to the necessary file integrations and conversions from scanned facsimiles, HTML recognition, extensive active hyperlink changes, extreme magnification, or translations from other formats (including PDF-encoded characters), you may find inaccuracies after editing documents and files. Additionally, some editing changes of PDF to CD-ROM files happen after conversion of data from smaller files to larger files. Larger files, commonly, provoke more digital problems. Certain discrepant event inquiry lessons on the Home Tree Media web site came from PDF and CD-ROM lessons in books authored by Professor William C. Bruce and Jean K. Bruce, such as Mindtronics! Inquiry Alive! After each books’ new edition, editing often digitally strays and truncates depending partly on an operating system’s rendering and embedded fonts including the possible conditions interpreted in the above paragraphs. Editing errors and inconsistencies that were corrected in a word processing manuscript sometimes emerge after PDF publication. Updated file revisions renew potential for fresh errors from strayed root and revised electronic exchanges. Errors in the emittance values are due to the discrepancy existing between the calculated optics stored in the database and the actual machine optics. 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For instance: Dr. Bruce, and his wife Jean, first authored a discrepant event book entitled: Learning Social Studies Through Discrepant Event Inquiry. Go to the following URL addresses to learn more about William C. Bruce and Jean K. Bruce through their blogs, too: University of Texas at Tyler, EPP University of Texas at Tyler, CPDT http://www.uttyler.edu/c_i/bruce.htm Free discrepant event lesson, 9-11 Blog: Pay Teachers More Blog: Test Scores Did you miss these pages? Home Tree Media Links: Discrepant Event: The Samurai Crab Quick Discrepant Event: Guns, Germs, and Steel Discrepant Event: Life on Earth and Mars Discrepant Event: The Titanic Fishing Boats Discrepant Event about oil prices: Crude Pulse Discrepant Event about oil prices/Extra links: Crude Pulse Discrepant Event: Mad Cow Discrepant Event Extra Links: Mad Cow Discrepant Event: Immigration Discrepant Event: Immigration/Extra Links Website Links Relating to the U.S. Presidency: Review President Lincoln's Emancipation Proclamation: National Freedom Day, The Gettysburg Address, and Rosa Parks The US Constitution Check Out Our Teacher Books Table of Contents for Mindtronics! and Inquiry Alive! Teacher Links #1 Teacher Links #2 Links to Women in Science Technology Home Tree Media Site Map Email Us Go back to main Concept Attainment Lesson