computers and society ist 2710 section 006 class #4: 1/30/08

Computers and SocietyIST 2710

Section 006

Class #4: 1/30/08http://www.is.wayne.edu/drbowen/casw08

1/30/08 Computers and Society, Class 4 22

Topics

• If you fall behind in homework and/or labs• Converting numbers with Calculator• File path, seeing your files• Lab period


Starting Off #1

• No attendance sheet this week – if you hand in a Quiz, I will take it for granted that you were here.

• Pick up copies ofo Lab and Assignment

1/30/08 Computers and Society, Class 4 41/30/08 4

Quiz 1

• Quiz 1: Some people missed it, so there will be a makeup.

• Once there is a makeup, anyone who wants to retake the Quiz (a different version) can do so, if they let me know, so that I will have a copy.

• Probably 5 – 6 PM in two weeks (2/13).


If You Fall Behind

• Starting next week, if you are two or more weeks behind on the homework or the labs, you must stay for the full class to get full attendance credit for that class.o Being able to leave early is to work on the

labs somewhere elseo If you are behind and leave, you will get 50%

attendance credit for that class

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Converting Binary ↔ Decimal #1

• Calculator does it!o Start > Programs > Accessories > Calculatoro Make sure that View is Scientific, not Normal

• dec = decimal, bin = binaryo Put Calculator in “from” mode, type number,

click “to” mode• Examples:

o Convert 1101 binary to decimalo Convert 57 decimal to binary

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Converting Binary ↔ Decimal #2

• Do binary addition 111 + 10• Convert 111 and 10 and answer to

decimal, check value• Binary addition, also multiplication, give

same answer as decimal• Do binary multiplication 111 x 11• Convert 111 and 11 and answer to

decimal, check value

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Managing Your Files

• File path – how to find your fileo File path example:

c:\My Documents\Computers\Lab1.docxo What do the parts mean? From broad to

particular• All the way on the left, drive• All the way on the right – dot separates extension

on right of dot from name on the left of the dot• Everything else is folders

folder, sub-folder, sub-sub-folder, etc.

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Tools for Seeing Your Files

• My Computer – desktop icon or Starto Click Folders button, click on a folder to see

its contentso Folder can hold folders and fileso Folders do not have information, only files do

• Windows Explorer – Start > Programs > Accessories > Windows Explorer

• “Keep your file safe tonightWalk the path from left to right”

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Internet

• “IP Address” – identifies every computer connected to the Interneto Example: 141.217.90.91o Information travels over the Internet in

“packets”• Head – what is in it• Tail – the information itself

o All packets are sent from one IP address to another


Internet

• One type of computer on the Internet – a server, or source of information – has, in addition, a domain nameo Domain - .com. .gov, .edu, .mil, .neto Domain Name – a name that ends with a

Domain• Example: www.is.wayne.edu, server for the

website for this course


Internet

• URL: Universal Resource (file) Locatoro Identifies the file you are asking foro Example:

http://www.is.wayne.edu/drbowen/casw08/topics_quiz_1.docx

o Parts:• http:// - the method, how to deliver the file

(HyperText Transport Protocol)• Domain Name of server (source), up to first slash• After that, the path on the server to that file (the

drive is set by the Server Administrator)


World Wide Web & Email

• World Wide Web and Email are Internet Applications that use the Internet for transporting information

• Internet started around 1945, WWW 1993

Internet Application

Internet ApplicationYou


World Wide Web

Four ways to get to a web page:

1. Type in the URL

2. Click on a link

3. History List

4. Favorite (Internet Explorer) or Bookmark (all others, such as Firefox, Mozilla, Netscape, etc. – there are ~ 50)


World Wide Web

• Many ways to use the web:o Researcho Travelo Shoppingo Emailo Social Networkingo Job Hunting (watch for job site web page)o Online education


World Wide Web

• Online Courseso Website for handoutso Upload and download assignments (works

like email attachments)o Generally reading is from a textbooko Online discussion – the star of the show

• Not a chat, where everyone has to be logged in at the same time

• You log in, see what others posted, respond• Next persons sees your postings also


World Wide Web

• Online communications styleo More informalo Can overreacto Netiquette rules listed in booko Abbreviations – in book

• Example: POS


Now, Lab 4