Classwork 3-10-11

1. Define the term resolution- the number of distinct pixels in each dimension that can be displayed
2. Two interactive services that could be provided with digital TV are video-on-demand (Comcast on demand)and DVR. Users are able to control the content of what they are viewing when they use these services because that is why they are there. The users are able to pause, fast forward, and rewind what they are viewing because of the digital TV and it's interactions. The interactive services provide the user with more convenience and more time on their hands.
3. Two ways a domestic installation such as a digital TV can communicate with the digital provider is through the cable/box. All of the interactions that are made on the TV whether it is buying a movie, or watching certain shows on pay-per-view, the digital provider has to have access to these transactions in order to charge the owner of the digital TV for what they have purchased. The digital providers have access to the cable/box and all that is purchased through the cable box. Another way is the binary digits and satellite communication the TV has. The digital providers are able to identify what the TV user is watching and purchasing through the satellite communication. Each digital TV needs binary digits as well as satellite communication in order to function and work correctly because there is no other way of solid communication.
4. The growth of video clips on the Internet is increasingly taking over the need of digital Tv. When viewers watch movies, shows, and documentaries on the Internet, they are most always free of charge, unlike a digital TV that is a hefty price. Video clips are becoming much more popular because not only are they very cheap, they are very convenient and their is no subscription or money transactions needed to view the clips, if their is an internet connection, video clips can be viewed. They are slowly but surely taking over digital TV because they make more sense financially as well as logically. On Video clip sites like Hulu, you are able to watch many free shows and episodes that are seen on digital TV, as a result many people wait till they come out on the website to watch them because if they have a laptop they can be viewed from anywhere. The disadvantages of video clips taking over digital TV is that it is a possibility that in time there will be no digital TV and Internet clips will be the only form of viewing television, however an advantage would be that people would not have to pay for shows or movies that they wanted to see anymore because they could just be seen for free on the internet. The affect of this is that it shows how the Internet is taking over the world and everything that is digitized because it is so much easier and better to use than perhaps digital TV.

4. A key field is a field or set of fields of a database table which together form a unique identifier for a database record.
B. The process used to create a query which would produce an alphabetical list of all citizens who were born after 1990 and have suffered from diabetes that do not smoke would consist of making a query using the query wizard, and identify the key fields that contain names, diabetes, smoke, and when the people were born. For the criteria of the query you would enter 'yes' for diabetes and 'no' for smoking, and then followed by the birthday using the < symbol.
C. Data matching is the task of finding entries that indicate the same entity in two or more files. Record linkage is a good and common technique when you have to join data sets that do not have a unique database key in common. Data mining is the process of taking out patterns from huge data sets by combining methods from stats and artificial intelligence with database management. With reference to the Icelandic database, the data is made anonymous by replacing the persons name with an ID number, which is used as a key field in the database. Citizens are required to give their personal information.
D. The advantages of medical research outweigh the concerns of the Icelandic citizens about storage of their genetic data to a very large extent because the medical research is saving their lives. The medical research is what is keeping the Icelandic people alive so there is no reason for them to be concerned about how their data is being stored. Without the medical research, the Icelandic people would not have any medical records at all, and would be in jeopardy of death or disease. The advantages of the medical research is that it allows Icelandic people to have treatment as well as identify any of their diseases, and the advantages of it being saved is that if there are any problems in the person further in their life they can be assessed by the medical records that have been saved.m The disadvantages of the medical research is that it takes away some of the freedom for the Icelandic people and exposes their enclosed culture, and a disadvantage of their medical records being saved in a query through an ID number is that their privacy is being somewhat violated and not taken into consideration. The affect of this is that the Icelandic people feel as if they are not being treated as fairly as they should, however the medical research outweighs their concerns because it helps the people. The advanced medical research is a lot more important than the simple concerns of the Icelandic people. Medical research and life saving is more important than privacy.