By Michael Lesk
This totally revised and up to date moment variation of figuring out electronic Libraries makes a speciality of the demanding situations confronted through either librarians and machine scientists in a box that has been dramatically altered by means of the expansion of the Web.At each flip, the target is functional: to teach you ways stuff you may need to do are already being performed, or how they are often performed. the 1st a part of the booklet is dedicated to expertise and examines concerns corresponding to various media requisites, indexing and category, networks and distribution, and presentation. the second one a part of the ebook is worried with the human contexts during which electronic libraries functionality. right here you can find particular and worthy details on usability, maintenance, clinical purposes, and thorny criminal and monetary questions. . worthy for electronic library tasks in all types of settings, together with advertisement and group ventures, museums, study associations, and schools.. Covers the total spectrum of media, together with textual content, every kind of pictures, audio, and video.. offers useful recommendation on reaching the simplest of what's attainable whereas fending off universal pitfalls.. packed with case experiences and references to useful outdoor assets.
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Additional resources for Understanding Digital Libraries, 2nd Edition (The Morgan Kaufmann Series in Multimedia and Information Systems)
Sample text
When thinking about digital libraries, many mundane questions arise, including how to convert material to digital form, how to deliver it to users, and how to pay for it. But some questions go to the key issues of libraries: What is their value to society? How can that value be preserved in digital form? What will the new organizations look like? and What services should they provide? ” Audience This book is practical. It addresses the problem of a librarian who wishes to digitize material and needs to understand what kinds of conversion technologies are available, or who wishes to purchase digital material and needs to know what can be done with it.
Some of its engineers moved to Remington Rand and there built the first successful commercial electronic computer, the Univac. Univac I filled a room; now, much more powerful machines fit on a chip. 7 indicates the progress in transistors per chip over the decades. For comparison, the ENIAC of 1947 had 18,000 vacuum tubes. Needless to say, there have been many significant advances since then, for example, in computer architecture (notably microprogramming) as well as in device design. The speed of processors has increased as well, although somewhat less dramatically than their complexity.
8 Changes in the price of memory. Were the relative price changes to break step, database systems would have to be redesigned. Relatively cheaper RAM would produce in-memory database systems and favor techniques like OODBMS (object-oriented database management systems); relatively cheaper disks, by contrast, would turn us back to batch-like database system designs. What is changing is that seek times on disks are not coming down as fast as either total capacity or data rate; this is changing disk usage algorithms to be more like tape algorithms.
