LIS 2670 week 9 digital preservation muddiest point

I do not have muddiest point this week.

LIS 2670 week 9 digital preservation reading notes

Olga Rieger. Preservatiaon in the age of large-scale digitization.
Washington, DC: Council on Library and Information REsources, 2008.
http://www.clir.org/pubs/abstract/pub141abst.html

Margaret Hedstrom “Research Challenges in Digital Archiving and Long-term Preservation” http://www.sis.pitt.edu/~dlwkshop/paper_hedstrom.pdf

Brian F. Lavoie, The Open Archival Information System Reference Model: Introductory Guide. http://www.dpconline.org/docs/lavoie_OAIS.pdf

Jones, Maggie, and Neil Beagrie. Preservation Management of Digital Materials: A Handbook. 2001. http://www.dpconline.org/graphics/handbook/index.html introduction and digital preservation sections.

Justin Littman. Actualized Preservation Threats: Practical Lessons from Chronicling America. D-Lib Magazine July/August 2007. http://www.dlib.org/dlib/july07/littman/07littman.html

1, preservation in the age of large-scale digitization
A white paper
The paper describes four large-scale projects, Google Book Search, Microsoft Live Search Books, Open Content Alliance, and the Million Book Project, and their digitization strategies. Then it discusses a range of issues affecting the stewardship of the digital collections they create: selection, quality in content creation, technical infrastructure, and organizational infrastructure. The paper also attempts to foresee the likely impacts of large-scale digitization on book collections.
It is comprehensive that includes nearly all the content of the class.


2, Research challenges in digital archiving and long-term preservation
challenges:
(1)Digital collections are vast, heterogeneous and growing at a rate that outpaces the ability to manage and preserve them.
(2) Digital archiving requirement reflect concern for the long term.
(3) The challenges of maintaining digital archives over long periods of time are as much economic, social and institutional as technological.
(4)Affordable and reliable digital preservation requires new tools and technologies.
(5)Affordable and reliable digital preservation requires infrastructure.


3. The open archival information system reference model

4,The handbook provides an internationally authoritative and practical guide to the subject of managing digital resources over time and the issues in sustaining access to them. It will be of interest to all those involved in the creation and management of digital materials.
I want to talk about the digital preservation section.
This section contains large amount of information on digital preservation.
Explains why build digital preservation, how are digital materials different, how much cost.etc., and introduces preservation issues such as technological issues, organisational issues and legal issues.
Digital preservation is an action that covers social, economic and technological issues.

5, Actualized preservation threats.

LIS 2670 week8 Access in digital libraries part 2 muddist point

I found that the precision and recall rate of the multimedia information is not high when I research. I think the metadata of multimedia is hard to describe. How to improve the multimedia information retrieval' relevance? I am curious.

LIS 2670 week8 Access in digital libraries part 2 reading notes

Chapter 1. Definition and Origins of OAI-PMH.oai-pmh-ch1.pdf

Todd Miller, Federated Searching: Put It in Its Place . April 15, 2004. http://www.libraryjournal.com/article/CA406012.html&

The Truth About Federated Searching. October 2003. http://www.infotoday.com/it/oct03/hane1.shtml

Lynch, Clifford A. (1997). The Z39.50 Information Retrieval Standard, Part 1: A Strategic View of its Past, Present, and Future. D-Lib Magazine, April 1997. http://www.dlib.org/dlib/april97/04lynch.html

Norbert Lossau, “Search Engine Technology and Digital Libraries: Libraries Need to Discover the Academic Internet” D-Lib Magazine, June 2004, Volume 10 Number 6. http://www.dlib.org/dlib/june04/lossau/06lossau.html

1, OAI-PMH
The open archives initiative protocol for metadata harvesting is designed for reach interoperability between digital libraries and facilitate efficient dissemination of information.
This paper introduces the basic definition and purpose of OAI-PMH. I think the most important thing is to understand the meaning of OAI-PMH in digital libraries.


2, Todd Miller proposes a new relationship between federated search engines and the library catalog
It is true that catalogs are rigid in digital age, since information are not limited to physical pattern that can find in one place. And most of content that required by users are not cataloged by libraries. When I use ebay, I find that the information retrieval system is very useful and ebay can provide high relevant results to me, describe content that I need for the commodities.


3, the truth about federated searching
This article talks several demerits and problems about federates search engines. I agree with the author's opinions, however, it is common that new things have existed some demerits and I believe scientists will work out these problems in the near future.


4, the Z39.50 information retrieval standard
the paper's focus is on how and why Z39.50 developed the way it did, and the conceptual debates that have influenced its evolution and use.


5, search engine technology and digital libraries
academically relevant content is very interesting to me.

LIS 2670 week7 Access in digital libraries part 1 muddist point

1, what does the sentence "ignore documents that try to 'spam' the text " mean in ppt 54?
2. Could you explain the image in ppt55 again? I do not understand it.

LIS 2670 week7 Access in digital libraries part 1 reading notes

LESK chapter 4.

David Hawking , Web Search Engines: Part 1 and Part 2 IEEE Computer, June 2006. http://www.computer.org/portal/site/computer/menuitem.5d61c1d591162e4b0ef1bd108bcd45f3/index.jsp?&pName=computer_level1_article&TheCat=1055&path=computer/homepage/0606&file=thingswork.xml&xsl=article.xsl&;

M. Henzinger et al. challenges in Web Search Engines. ACM SIGIR 2002. http://portal.acm.org/citation.cfm?coll=GUIDE&dl=GUIDE&id=792553

I do not find the readings of the first and the second one. I will put my reading notes when I find the articles. I have searched the second article in IEEE database, but I do not find this paper.

Challenges in web search engines:
In this paper, the author points out several challenges that faced by current web search engines. I do think spam is anywhere in today's search engines. And the precision rate is not very high. When we do some searches in search engine, only top -ranked results can meet my needs. The other results are more like trash. Now, we are in a sea of information and advertisement. Relevance is very important in current search engines.

LIS 2670 week 6 XML and Markup Languages muddist point

1, what dose the sentence " 80% of SGML' s power at 20% of its complexity." mean?

2, What is the difference between the URI in an XML namespace and the URL?

3, Which is more popular, DTD or XML schema? Speaking of digital objects, which of two do we use?

4, Why the defaults of minOccures and maxOccurres are both 1 in PPt45? I thought the default of minOccures is 0.