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1 Computer-network interest groups Introduction. 2 Computer-network interest groups: summary The following gives an overview of systems to communicate.

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Presentation on theme: "1 Computer-network interest groups Introduction. 2 Computer-network interest groups: summary The following gives an overview of systems to communicate."— Presentation transcript:

1 1 Computer-network interest groups Introduction

2 2 Computer-network interest groups: summary The following gives an overview of systems to communicate in a group by using computer networks. These systems can be seen as sources of information, besides many others.

3 3 Computer-network interest groups: prerequisites Before using systems to communicate in groups through computer networks, you should ideally have some knowledge and skills related to computer hardware computer software the Internet the WWW electronic mail

4 4 Computer network interest group system Computer-network interest groups: the basic scheme ? Question ? ! Answer !

5 5 Computer-network interest groups as information resources Computer-network-based interest groups are a means for information exchange between people with a common interest or concern. They enable their members to keep abreast of new developments, and to tap into the expertise of the community represented by the group.

6 6 Computer-network interest groups: various existing systems Conferences on computer-services like AOL, CompuServe, Dialog, Data-Star, many Bulletin Board Systems, lists ! Usenet News ! Furthermore, since the 1990s, the WWW has become a gateway to these and a basis for similar systems.

7 7 Computer-network interest groups: aims and applications Searching and finding (up to date) information ! Developing your network of professional contacts Developing your network of personal contacts Telling others about your experience Expanding your customer base Bargain hunting Finding a job Voicing your opinion...

8 8 Computer-network interest groups: passive and active participation Subscribers can participate passively ( = only read incoming messages) actively ( = read incoming messages + reply to incoming messages + create and send new messages)

9 9 Computer-network interest groups: various types Worldwide versus limited (local or regional) groups. Open (public access), versus closed groups.

10 10 Computer-network interest groups: number of interest groups More than interest groups have been listed in directories (in 1998).

11 11 Computer-network interest groups: searchable archives Past messages to many interest groups are kept in online archives. These may be browsed and searched. They provide a useful source of up-to-date information in various subject areas.

12 12 Computer-network interest groups - based interest groups

13 13 - based interest groups: synonyms (based) conferences Computer (based)(discussion) lists Network (based)discussion groups forums interest groups Listservs Reflectors Aliases

14 14 - based interest groups: description When you are an user, you can correspond not only with individuals, but also with groups of people who share your interests. The electronic mailing list is tailor- made for doing just this. The basis of the electronic mailing list is the distribution of a message to many people simultaneously. In this case, the many people are the subscribers to the list, who have joined because they have an interest in the subject of the list. They can all contribute messages to the list, and they all receive every message sent to the list.

15 15 !? Question !? Task !? Problem !? A group of people can communicate simply by , using a list of each others addresses. Why is this not ideal? Why do we want a more efficient system? How would that work? A group of people can communicate simply by , using a list of each others addresses. Why is this not ideal? Why do we want a more efficient system? How would that work?

16 16 - based interest groups: computers and addresses involved One central server computer for the group/list Two electronic mail addresses for each group/list: »One for subscribing, unsubscribing, etc… »One for posting your messages Often an electronic archive available at the same or at another server computer

17 17 - based interest groups: role of the server computer system The list server computer system takes care of »membership »distribution of messages »record-keeping »...

18 18 - based interest groups: How to subscribe? By sending an message, in many cases: to Subject: DO NOT FILL IN in body: sub[scribe] listname Your_first_name Name Through a gateway system on WWW

19 19 !? Question !? Task !? Problem !? Can you give an example of an - based interest group?

20 20 - based interest groups: examples (for subscribing, …) (for posting) devoted to the retrieval software package CDS/ISIS (for subscribing, …) sunsite.berkeley.edu (for posting) devoted to World Wide Web applications in libraries Example

21 21 !? Question !? Task !? Problem !? Why are there 2 addresses associated with each interest group?

22 22 - based interest groups with one or more moderators

23 23 - based journals: moderator >>> editor

24 24 Electronic mail - based journals and newsletters Equivalent to a paper journal, but online. They range from the purely lightweight and possibly not very reliable, through to serious refereed academic journals. As with paper journals, they may be subscribed to, and in some cases, subscriptions are charged for.

25 25 - based interest groups: How to find relevant groups? You can (use printed directories of interest groups) use subject-oriented indexes and directories to search for Internet-based sources in general search directory files concerning interest groups online! Examples: »http://groups.yahoo.com/http://groups.yahoo.com/ »http://www.forumone.com/http://www.forumone.com »http://www.liszt.com/http://www.liszt.com/

26 26 !? Question !? Task !? Problem !? Identify an - based interest group which is interesting for you.

27 27 !? Question !? Task !? Problem !? Subscribe to an - based interest group.

28 28 - based interest groups: filters in the client program Advanced client programs allow filtering of messages based on rules specified by the user. This simplifies reading and managing . Filters allow the transfer of the messages concerning different interest groups from the general in-box to corresponding mailboxes.

29 29 Computer-network interest groups Usenet News

30 30 Usenet News: what it is Usenet is a worldwide computer-network conferencing system. Usenet is the set of people who exchange articles tagged with one or more universally recognized labels, called newsgroups (or groups for short). Usenet Usenet server computers Usenet clients

31 31 Usenet News: what it is NOT Usenet is NOT a network for universities only. Usenet is NOT a UUCP network. Usenet is NOT a network of UNIX computers. Usenet is NOT the Internet. Usenet is NOT software.

32 32 Usenet News and Internet Network server computers receiving a Usenet newsfeed Network server computers in the Internet

33 33 Usenet News: some quantitative data More than newsgroups exist (in 1997). The authors/senders generate/send/post about 500 MB of information per day (in 1997).

34 34 Usenet newsgroups form a hierarchical structure Newsgroups are organized by subject area into a multi-layered hierarchy ( = tree-structure). This helps the users to find the right newsgroups.

35 35 Usenet newsgroups form a hierarchical structure: an example... alt comp recscisoctalk binaries infosystems lang os gopher kiosks wais misc providers users... Example

36 36 Usenet: examples of newsgroups related to libraries fr.doc.biblio comp.internet.libraries soc.talk.libraries Examples bit.listserv.cdromlan bit.listserv.asis-l bit.listserv.libref-l bit.listserv.libres bit.listserv.medlib-l bit.listserv.pacs-l bit.listserv.web4lib

37 37 Usenet: examples of newsgroups related to fisheries Sci.bio.net Examples

38 38 !? Question !? Task !? Problem !? Can you give an example of a Usenet newsgroup that is interesting for you?

39 39 Usenet News: advice for new users The best source of information for new Usenet users is the newsgroup news.announce.newusers This newsgroup contains messages such as »What is Usenet? »Rules for posting to Usenet »Answers to Frequently Asked Questions »Descriptions of available newsgroups

40 40 Usenet News: reading newsgroups To read the messages on Usenet, subscribers use a suitable client program, a newsreader. Most newsreaders keep track of what articles subscribers have seen and which they have not. Newsreaders allow users to be selective about which newsgroups to look at regularly. Newsreaders are available for Unix, VMS, VM/CMS, DOS, various Windows, Macintosh, and other platforms.

41 41 Usenet News client programs for Windows You can read and/or post News messages using a News client program (newsreader) on your microcomputer running with »DOS, »Microsoft Windows up to 3.11, Windows 95, 98,... »Microsoft Windows NT 4 Workstation, Windows 2000,... »...

42 42 Examples Usenet News client programs for Windows: examples (Newsreaders in network software packages) Shareware newsreaders: WINQVT, WinVN, Wintrumpet, NewsXpress, (Free) Agent,… Commercial specialised newsreaders: Agent, Gravity,... WWW browsers including a news reader: »Netscape »Microsoft Internet Explorer with Outlook Express,...

43 43 Usenet client programs for Windows: Agent Example

44 44 Archive of Usenet newsgroups searchable online A partial archive of Usenet News is available through the WWW. Searchable online. Usage is free of charge.

45 45 Archive of Usenet newsgroups searchable online: Google Since 2001, the archive that was started by Deja is available with a different user interface through

46 46 !? Question !? Task !? Problem !? Try to find relevant information, using a searchable Usenet archive database.

47 47 Computer-network interest groups groups and Usenet News considered together

48 48 Computer-network interest groups: How to find relevant groups? You can (use printed directories of interest groups) use subject-oriented indexes and directories to search for Internet-based sources in general search directory files concerning interest groups online search Usenet archives and identify those newsgroups from which relevant messages are retrieved ! (subscribe to a Usenet current awareness service, and identify those newsgroups which yield relevant messages)

49 49 Computer-network interest groups: online searchable directories (1) About groups »http://groups.yahoo.com/http://groups.yahoo.com/ »http://www.forumone.com/http://www.forumone.com/ About groups based on listserv server software: CataList: »http://www.lsoft.com/lists/listref.htmlhttp://www.lsoft.com/lists/listref.html Examples

50 50 Computer-network interest groups: online searchable directories (2) About both groups and Usenet newsgroups »http://paml.alastra.com/http://paml.alastra.com/ »http://tile.net/http://tile.net/ »http://www.liszt.com/http://www.liszt.com/ »http://www.mailbase.ac.uk/kovacs/http://www.mailbase.ac.uk/kovacs/ »http://www.meta-list.net/http://www.meta-list.net/ Examples

51 51 !? Question !? Task !? Problem !? Find one or more newsgroups which may be relevant for you.

52 52 Interest groups in the networks: problems for the user (Part 1) Yet another type of information source and medium to study and to use: »takes some time to learn »costs time to use Variations in the methods to use the systems: »Great differences in method between - based groups and Usenet News, in spite of the same aims »Subtle differences in method between various - based groups due to variations in the server software

53 53 Interest groups in the networks: problems for the user (Part 2) Low precision: low ratio of relevant items to noise, due to »Low quality of subject descriptions »Low quality of message contents »... It is difficult to identify relevant Usenet groups in a systematic way, and even more so in the case of - based groups.

54 54 Interest groups in the networks form good information resources Complementary to other information sources A lot of information offered in the groups Not only text information, but also other data types Growing amount of information offered in this way Relatively cheap type of information source Extra hardware not required to use the resource en Usenet client programs available free of charge Relatively easy to use Refreshing, dynamic, developing systems

55 55 Future trends in computer-network interest groups: usage Increasing number of interest groups Increasing number of readers / users


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