Search Engine

3.4 Search Engine -

3.4.1 Introduction

we can use a search engines for finding web address. it is a big storage of datas in internet, selecting and presenting data by a robot.

3.4.2. types of search engines

mainly there are four types of search engines selecting method of data is the main defference.

1. Free text search engine

1. google
1. Index based search engine
1. yahoo

3. Meta search engine
1. http://43marks.com/

2. dogpile.com

4. Natural Language Search Engine
1. ask.com

this address can use for find various types of search engines by category.

3.3 List of Search engine

http://www.internet4classrooms.com/search.htm

eg:

http://www.wotbox.com/

https://www.ixquick.com/

http://www.zuula.com/

Clustering Search Engines

http://search.carrot2.org/stable/search

http://www.yippy.com/

Kid Safe Search Engines

http://cybersleuth-kids.com/

http://www.kidrex.org/

Same result of search engines

Type	Example	Result
Free-text	Google	2,970,000 results
index based	Yahoo	6,420,000 results
Meta	Dogpile

Natural Language Search Engine

Ask

start

http://start.csail.mit.edu/index.php

how to use google effectively

1. Traditional way
1. type the word or phrase in box and click search
2. Effective Way
1. Use .lk >>> .com
2. google apps
1. forms of information (තොරතුරු රූපාකාරය)

Web Search - Search billions of web pages
Google Chrome - A browser built for speed, simplicity and security
Bookmarks - Access your bookmarks and starred items

Mobile
Mobile - Get Google products on your mobile phone
Maps for mobile - View maps, your location and get directions on your phone

Search for mobile - Search Google wherever you are
Business
Google Apps for Work - Get email, docs, storage and more, customized for your business
AdSense - Create online revenue today
AdMob - Make money from your apps

Media
Books - Search the full text of books
Image Search - Search for images on the web
News - Search thousands of news stories
Video Search - Search for videos on the web

Geo
Maps - View maps and directions
Earth - Explore the world from your computer

Specialized Search
Custom Search - Create a customized search experience for your community
Scholar - Search scholarly papers
Trends - Explore past and present search trends

Home & Office
Gmail - Fast, searchable email with less spam
Drive - Create, share and keep all your stuff in one place
Docs - Open, edit, and create documents
Sheets - Open, edit, and create spreadsheets
Slides - Open, edit, and create presentations
Forms - Build free surveys
Drawings - Create diagrams and flowcharts
Sites - Create websites and secure group wikis
Calendar - Organize your schedule and share events with friends
Translate - Instantly translate text, web pages, and files between over 50 languages

Social

Google+ : Real-life sharing, rethought for the web

Blogger : Share your life online with a blog - it's quick, easy and free

Groups : Create mailing lists and discussion groups

Hangouts : Conversations that come to life. Anytime, anywhere, for free

Innovation

Code - Developer tools, APIs and resources

1. Images
2. Youtube
3. ppt search
1. slideshare
2. pppst.com
4. pdf
5. I’m feeling lucky

3. Subject Gateways

3.1 surface and deep web

3.2. surface web

The Surface Web

Web Pages with static or persistent URLs that can be detected by a search engine crawler.

Once detected, the URL is added to that search engine's database and can become a result in a query or search of that search engine.

3.3. deep web

How big is the Deep Webs?

550 billion documents & 500 times the content of the surface Web

Google has identified 1.2 billion documents

An Internet search typically searches .03% (1/3000) of available content.

The Deep Web contains 7,500 terabytes of information, compared to 19 terabytes of information in the Surface Web.

(figure : 3.1 : Deep web and surface web  http://cathryno.global2.vic.edu.au/files/2010/05/Invisible-Web.gif)

(figure: 3.2 : How is web : http://blog.gostorm.net/wp-content/uploads/2012/10/Brainstorm_DeepWeb.png)

3.4. subject gateways (subject experts)

• definition

subject gateways are catalogs of websites collected, organized, and maintained by humans, not robots or spiders.

3.4.1. types of subject gateways

examples

www.vlib.org

(figure: 3.3. :The WWW Virtual Library : http://vlib.org/)

www.lii.org

http://bubl.ac.uk

www.deweybrowse.org

http://www.ipl.org/

(figure : 5.1 : screenshot the Home Page of ipl2 : http://www.ipl.org/)

Darknet (tor browser)

3.5 Cyber bullying

hate people by using electr onic medias like phone calls, websites, e-mails, chat room, sms

The Internet

2.1 Introduction

the internet is the physical network of computers on which information travels.

තොරතරු ගමන් කිරීම සදහා සදා තිබෙන භෙතික පරිගණක දැල

virtual resources

cloud computing

2.2 components of the internet. (අන්තර්ජාලයේ සංරචක).

1. world wide web ලෝක ව්‍යාප්ත ජාලය. වි්ස්ව විසිර වියමන.
2. e-mail
3. news group / discussion groups
4. Listserv
5. File Transfer Protocol
6. Conferencing / chat
7. Telnet
8. Multi User Dimension (MUD)

2.3 Evolution of the Web

introduced by - tim berners lee  

(picture : tim berners lee .)

versions of web

(Figure: 2.0 : versions of web :https://chamnanvanakit.files.wordpress.com/2013/08/web3_3.jpg)

how many people used

(Figure 2.1 : the Changing interweb : https://it-pr-saja.wikispaces.com/file/view/web1to31.jpg/523157648/708x494/web1to31.jpg)

(figure  2.2 : Information to Knowledge

2.4.0 Method of Finding information on the WEB / searching information on the web

4.1  Access  - ප්‍රවේශ වීම.

that need a web browser there are so many browsers

(figure 2.3 : different web browsers :  http://hautesecure.com/wp-content/uploads/2012/11/browsers-icons.png)

4.2. using an internet address

we should remember an internet address . we can access web sites using address. that address should type in address bar.

eg. www.nie.lk , www.e-thaksalawa.moe.gov.lk , www.vidumanpetha.com,  www.ixl.com ,

4.2.1 Anatomy of URL

(figure 2.4 : anatomy of URL http://www.people.vcu.edu/~gasaunde/201001INFO202URLAnatomy.pdf )

Internet address of URL

4.2.2. Domain Names

the text is in before second / mark after protocol.

.edu  - education

.com - Commercial

4.2.3. Domain names(country of origin)

.ch = switzerland

.de = Germany

.my = Malayasiya

.lk = Lanka

(figere : 2.5 : Country Codes : http://thumbs.dreamstime.com/z/country-code-top-level-domain-world-map-13023859.jpg )

reffer - https://en.wikipedia.org/wiki/List_of_Internet_top-level_domains

4.2.4 Private Web Address

after / before domain if there is a symbol like ~, % , Name is private web address

Tilde mark   ~

Percentage Mark  %

Name  Mike

referring address

https://en.wikipedia.org/wiki/Pistachio

down arrow mark that end of the sentence

cache - place of information

similar - සමාන වෙනත් ලිපි.

4.3 Website Evaluation

there are some models to evaluate a site

AAOCC model

finding the author of article by Truncate

URL should truncate for home page. there should have author details.

Eg: www.sundaytimes.lk/.../pistachios-can-protect-the-hearts-of-diabetics-11…

find Publiser by using www.easywhois.com