1. Important skills for Computer Based Researching
Peter Szluka, Attila Skulteti

2. Network Communication
Network: A group of computers connected through a communication channel. (Internet)
Two types of computers: server and client
Client-Server connection
Dedicated computer,answers the requests: server
For example: Web servers, database servers etc..
The one that makes the requests: client
Typically home, or end-user computers

3. Network Communication How computers find each other?
IP address: ID of the computers connected to the internet. Format: x.x.x.x, x={0-255}
Domain name: Like IP address, but easy to memorize. Translation: DNS servers eg.:

4. Network Communication
Limitations of IP address: (IPv4)
around unique address (232)
IP exhaustion soon
Solution: Network Address Translation
Real Solution : IPv6 (Internet Protocol version 6)
128 bit adresses – much much more possible address and better structure

5. Network Communication
Client No. 1
Computer (DSL, Dialup)
Server
IP:
Domain:
NAT
Proxy server 1 (eg. DSL Router)
Computer 1:
Local (inner) IP:
Real (outer) IP: (Authentication)
Client
Computer 1
Client Computer 2
NAT: Network address translation

6. Network Communication Database ‘login’ types, authentication
IP identification
Automatic method, no Username or Password needed.
Only for fixed IP-s
Password authentication
From any IP (You can use it at home)
Not automated (Number of problems increased by number of databases, forgotten, stolen password)
Combined (IP and Password)
Rarely used. Data acquisition, login statistics (eg. EISZ)

7. URL format Format: protocol://servername.domain.country
Hyper Text Transfer Protocol
For HTML pages, Default value of the browsers
FTP:// File Trasfer Protocol
Downloading files
Server name: In most cases WWW (World Wide Web) Can be different: WWW is NOT need in every URL!
Domain: Usually shows the structure of the institute Eg.: lib.sote.hu (.hu: Hungary, .sote:Semmelweis University, .lib:Library)

8. Word processors Microsoft Word (2003, 2007, 2010 etc..) Open Office
Part of MS Office, widespread
Open Office
Free, similar to MS Office, compatibility problems.
WordPad
You can use it in the library. „Word lite”
Notepad (Plain text)

9. Document formats DOC and DOCX (MS Word) Rich Text (.rtf)
Compatibility problems
Rich Text (.rtf)
Recommended to use with Wordpad
Plain Text (.txt)
Just characters, formatting is not available (Bold fonts, font type, etc.)

10. E-journals, Article formats PDF Full-text
PDF (Portable Document Format, Adobe)
Reprint format (Like photocopies)
File size can be large (depending format and page number)
Easy to save (if it is not copy protected)
Not easy to „reuse” the article (small Pictures)
Adobe Reader must be installed to view articles
Reading on small displays is problematic.

11. E-journals, Article formats HTML Full-text
HTML (Hyper Text Markup Language)
Showed by your Internet Browser
Easy to read
Problems with printing
Problems with saving
Good for „Reusing” pictures, tables, etc.

12. Link Resolver systems
Automated searches with the bibliographic data of the results, when you search in a database (like Medline)
Full text link appears in every record in the result list. (If there is a full text available)
Fault possibility: Dynamic full-text databases. (If you really need the article and full-text link does not appears, in some cases you can find it in the e-journals database at

13. Base Logic operators – Set theory
Boole Algebra
Union OR
Section
AND
Complement
NOT

14. Using the clipboard
A storage tool, wich allows to save, and reuse data temporarily (text, images, etc.)
Always stores the last saved data. (some programs, like Office can store more data at once)

15. Using the clipboard Copy-Paste: Printscreen
Ctrl-C: puts the selected data into the clipboard
Ctrl-V: copy the data from the clipboard
Printscreen
PrtScr: the picture of the whole desktop appears on the clipboard as an image
Alt+PrtScr: Only the selected window’s image

16. Thank you for your attention!