chapter 6
· Contrast types of computer graphics programs
-Painting: paints pixel on the screen with pointing device moves translated into lines and patterns on the screen
-Image Processing: manipulate photographs/other high resolution images
- Drawing: stores a picture as a collection of lines and shape
- CAD: create design on screen for products ranging from computer chips to public buildings
· Computers changing way professionals and amateurs works with video, animation, audio and music because these programs makes people work in simply way
· Relationship between hypermedia and multimedia is hypermedia refers to information linked in non-sequential ways not only combines text & numbers, but also all kinds of multimedia, like graphics, video, animation, etc
· Present applications for multimedia technology is just like all the programs above. Otherwise for the future, there are Virtual Reality, Tele-immersion & Augmented Reality
chapter 7
· Database is collection of information stored on computer disks. consists of database program
· Problems that can be solved with database software like storing large quantities of information, retrieving information with quickly & flexible, organize-reorganize information database printing output in variety ways
· Kinds of database software, simple file manager à complex relational database are batch processing, real-time computing and interactive processing
· Database operations are: storing (entering records); sorting (rearrange records); updating (renewing record’s field); querying (find records that match specific criteria); and summarizing information (the conclusion we get from the record’s field)
· Easily accessible databases makes lives safer/more convenient because there are many kinds of database software & we just have to choose what would likely we need. Then, database systems, can we use to save our personal information that we might forget if we don’t write it down somewhere
· Ways databases threaten our privacy because database load personal information, which might be great value for someone. This information could be privacy that can maintain our dignity and freedom
chapter 8
· Basic types of technology that make telecommunication possible is Geostationary Communications Satellites that match the Earth’s rotation, so they can hang in stationary position relative to the spinning planet below, relaying wireless transmissions between locations on the planet
· Local Area Networks (LAN) computers are physically close to each other, usually in the same building or cluster of buildings. Each computer & peripheral is an individual node on the network. This node connected by cable
· Uses of :
–E-mail: send and receive messages to others on network(with HTML)
-Mailing List: participate in e-mail discussion groups on special-interest topics
-Newsgroup: public discussion on a particular object
-Computer Telephony: messaging system that can store, organize and forward messages
· How wireless network technology transforming ways people work and communicate because it provides practical solutions. A lightning-fast network connection to desktop is of little use, when bandwidth is less important than mobility and portability
· Current trends in telecommunications and networking like video rentals, cable TV, newspapers, and magazines will be transformed or replaced by digital high-bandwidth interactive delivery systems of the future
chapter 9
· Internet was created with the build of ARPANet (Advanced Research Projects Agency Network) in 1969 by team of visionary computer sciences developing request of the Department of Defense, because the world needs something that making connection or network easier and simple
· Technology that is at heart at internet is Transmission Control Protocol/Internet Protocol (TCP/IP) that allows cross network communication
· Technology that makes web work as a multimedia mass medium are some utility’s software that can connect to programs that we are working on it
· Tools to build website is HTML (HyperText Markup Language)
· Important social and political issues raised by the growth of the internet: filtering software to combat inappropriate content, digital cash to make online transactions easier and safer, encryption software to prevent credit card theft, digital signature to prevent e-mail forgery, access & censorship, and digital divide
chapter 10
· Types computer crime, possible crime prevention are theft by computer, software piracy, software sabotage, and hacking and electronic trespassing. How to prevent this crime: make all online purchases using (separated) credit card, make sure a secure web is managing the transaction, don’t disclose personal information over the phone & shred sensitive information
· Security issues facing computer users, system administrators, law enforcement are security measures prevent crime, but can also post threats to personal privacy, and system administrators play a key role in security and back-up
· Computer security relates to personal privacy issues with active badges, it can simultaneously improve security and threaten privacy
· Security and computer reliability related because computer security involves more than protection from trespassing, sabotage & other crimes. Then, software errors and hardware glitches account for some of the most important security issues
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