Saturday, October 24, 2009
Friday, October 23, 2009
HTML Cheatsheet -
This site, by Webmonkey, has been around for awhile-at least 10 years. It is similar to the W3 site, featuring HTML tags, but is a more compact, less extensive guide.
W3 School Cascading Style Sheet Tutorial:
Another W3 page-this one features a tutorial on CSS.
Goans, D., Leach, G., & Vogel, T. M. (2006). Beyond HTML: Developing and re-imagining library web guides in a content management system.
This paper evaluates the use of CSS and tagging in content management systems, describing problems and solutions to technological and communications problems with software and library staff.
Friday, October 16, 2009
Thursday, October 15, 2009
"How Internet Infrastructure Works"
The article discussed computer network hierarchy and how the different levels of the hierarchy enabled accessed to the web.
"When you use the Web or send an e-mail message, you use a domain name to do it. For example, the Uniform Resource Locator (URL) "http://www.howstuffworks.com" contains the domain name howstuffworks.com. So does this e-mail address: email@example.com. Every time you use a domain name, you use the Internet's DNS servers to translate the human-readable domain name into the machine-readable IP address."
"Dismantling Integrated Library Systems"
The article highlights problems vendors and libraries have over adapting existing Integrated Library Systems to reflect the growing use of internet resources by patrons. The author that interoperabilty-vendors and librarians joining forces to provide products that maximize access for users-is the only way to go. Difficulty integrating (and possibly prohibitive cost) standalone models is discussed. Also makes the argument that working Open Source System wouldn't decrease cost, just move the money to maintaining the software and system.
See: XML, OHI-PMH
"Sergey Brin and Larry Page: Inside the Google machine"
Google founders Sergey Brin and Larry Page discuss how Google works. What was interesting about the lecture was the map that showed which countries used Google for queries the most. The lack of usage in Africa highlights the need to provide access and resources to enable communications and networking on the continent.
Tuesday, October 13, 2009
LT Create Account
LT Add Books
LT Create a Collection
LT How to Catalog and Search Your Books
Friday, October 2, 2009
LANs differ from WANs due to their high data transfer rate, local area of operation, do not need to lease telecommunication lines.
Ex. Ethernet, WiFi
TCP/IP protocol used.
Fiber optic cable used for high bandwidth.
LANs use spanning tree protocol to avoid loops and use VLANs to segregate traffic.
VLAN-a group of hosts with common requirements that communicate like they were attached to a broadcast domain-does not depend on location.
Group of interconnected computers
The Advanced Research Projects Agency (ARPA) funded the design of the "Advanced Research Projects Agency Network" (ARPANET) for the United States Department of Defense-first network of computers.
Networks are classified by the software that connects them (ex LAN).
Wireless LANs use infrared signals or radio waves to transmit.
Types of wired technologies:
Twisted-Pair Wire - used medium telecommunication.
Coaxial Cable – used for cable television systems, office buildings, and other worksites for local area networks.
Fiber Optics – These cables consist of one or more thin filaments of glass fiber wrapped in a protective layer. It transmits light which can travel over long distance and higher bandwidths.
Terrestrial Microwave – Terrestrial microwaves use Earth-based transmitter and receiver. The equipment look similar to satellite dishes. Terrestrial microwaves use low-gigahertz range, which limits all communications to line-of-sight. Path between relay stations spaced approx. 30 miles apart. Microwave antennas are usually placed on top of buildings, towers, hills, and mountain peaks.
Cellular and PCS Systems
Bluetooth – A short range wireless technology. Operate at approx. 1Mbps with range from 10 to 100 meters. Bluetooth is an open wireless protocol for data exchange over short distances.
The Wireless Web – The wireless ex. cellular phones, pagers,PDAs.
Vary in size (LAN, SAN, WAN, VPN)
Internetwork-two or more networks linked.
Intranet-set of networks that use Internet Protocol
Extranet-limited to one network.
Network card, repeater,hubs,bridge.
*"A network bridge connects multiple network segments at the data link layer (layer 2) of the OSI model. Bridges do not promiscuously copy traffic to all ports, as hubs do, but learn which MAC addresses are reachable through specific ports. Once the bridge associates a port and an address, it will send traffic for that address only to that port. Bridges do send broadcasts to all ports except the one on which the broadcast was received."
Local ,remote, and wireless bridges.
"Management of RFID in Libraries"
The article covers the growing use of radio frequency identifiers in libraries. There are two types of RFID with several uses; the one used most by libraries is a short frequency version. RFIDs enable quick checkout-on the negative side, the frequency can easily be interfered with and librarians are wary about privacy concerns and staff "obsolescence."