|
How Do Search Engines Work? Search engines search a database of web pages that it has harvested and cached. Search engine databases are selected and built by computer robot programs called spiders that "crawl" the web, finding pages for potential inclusion by following the links in the pages they already have in their database. Once they find pages, they pass them on to another computer program for "indexing." This program identifies the text, links, and other content in the page and stores it in the search engine database's files so that the database can be searched by keyword and whatever more advanced approaches are offered, and the page will be found if your search matches its content. "Recommended Search Engines." Finding Information on the Internet: A Tutorial. 2009. 04-18-2009. <http://www.lib.berkeley.edu/TeachingLib/Guides/Internet/SearchEngines.html>. Search Tips: Click Here!
|
|||
|
SEARCH ENGINES
Google Search Engine
Intute:
A free online service
providing you with a database of
hand selected Web resources for
education and research. Academic Index: The Academic Index is a true meta-search tool that includes results from mega-information databases that index only research-quality reference and information sources selected by professional librarians, educators, and educational and library consortia.
AcademicInfo: A
gateway to quality informational
sources. Awsome Library: Carefully reviewed resources, including the top 5 percent in education. BBC: Our search service isn't here to make any money, so our results are the ones that best match your search words - not the ones want you to see." Climate Change: Customized search and news feed of reviewed, authoritative content. Biology Crawler: Delivering easy and relevant results about Biology! Chemistry Crawler: Leading chemistry search engine and business directory online. Cyber Sleuth Kids: In Internet Search Guide for K-12 kids. Dewey Browse: Web sites classified by the Dewey Decimal Classification System for grades K-12. Dictionary Crawler: Information about dictionaries. Economic Crawler: The Leading Economics Search Engine and Business Directory Online. Education World: A place where educators go to learn. Fields of Knowledge: Eighty-nine percentof the subject specialists who provide contnt to this database are college professors who provide superlative information. Google Scholar Google Scholar Provides a search of scholarly literature across many disciplines and sources, including theses, books, abstracts and articles. Infomine: Browse annotated research and educational sites enhanced by second-tier "robot-selected" results Insectclopedia: Insect Research Portal. iSeek: A targeted search engine for students, teachers, administrators, and caregivers.
Ixquick Metasearch: Ixquick's unique capabilities include a Universal Power Search, a global search and power refinement. Librarians' Internet Index: Websites you can trust. Kartoo:
refseek: Aiming to make academic information easily accessible to everyone! The Environmental Directory: A large environmental search engine. Translator: Translate up to 150 words. VADLO: Caters to all branches of life sciences. VADLO allows users to search within five categories: Protocols, Online Tools, Seminars, Databases and Software. Virtual Learning Resource: Thousands of the best academic information websites, selected by teachers and library professionals worldwide, in order to provide to students and teachers current, valid information for school and university academic projects!
IncyWincy The
Invisible Web Search Engine METASEARCH
ENGINES
Dogpile Metasearcher
A metasearcher that searches the indexed databases of other search engines and subject directories. Dogpile makes searching the Web easy, because it has all the best search engines piled into one. Go Fetch!
MSN Search Engine: Currently recognized as one of
the major search engines on the Web;
strong search features.
Ask Search Engine: Offers a new approach to
displaying search results by
putting them into subject
categories or sub-divisions
called Web communities.
Vivisimo Metasearcher: A metasearcher that presents its results in subject groupings by sub-categories. Vivisimo doesn't search Google, but it does search MSN. Yahoo! Search Engine: A major player in the search engine game, Yahoo! has purchased other older engines (e.g., AlltheWeb and Alta Vista) and substituted its new search technology for theirs. |
SUBJECT DIRECTORIES
Subject Directories are much
smaller than search engines.
They are compiled by human
editors who select pages for
inclusion on the basis of
pre-determined criteria. Subject
directories are organized and
searched by subject category.
Yahoo! Directory
A subject directory that can
be browsed by category or
searched directly. Heavy
commercial emphasis but good for
popular and general searches.
Librarians' Internet Index: A specialized subject
directory, with annotations,
that points to recommended web
sites across the board that have
been previously evaluated before
inclusion.
Virtual Reference Shelf
A database of freely available basic reference resources, compiled by the Library of Congress. IMAGES JISC Digital Media: Digital Media reviews image search engines. NEWS Scoop: Monitors worldwide news sources in near-real-time http://www.ftc.gov/bcp/edu/microsites/idtheft/law-enforcement/law-enforcement-resources.html
|
||
|
| |
|
