1. a) define operating system:
The software that supports a computer's basic functions, such as scheduling tasks, executing applications, and controlling peripherals
b)Describe two utilities provided by an operating system that would be helpful in enabling the author to use his computer effectively despite his injury.
two utilities provided by an operating system that would be help enabling the author to use his computer effectively dispite his injury are voice recognition software, that allows him to speak the rest of his article and the computer will type put the words into the word document.
4.
a) computer systems able to perform tasks that normally require human intelligence, such as visual perception, speech recognition, decision-making, and translation between languages
b) clippy tells the user how to right a letter by recalling information previously programed into his program which is recalled through the user typing in keywords that would lead to the recalled information; keywords such as "letter" or "how to write a letter"
2. a) two technical reasons why the quality of videos viewed from web sites can be limited are resolution, becuae the low it is the lower the quality of the video and the amount of bandwidth being filled, for if the bandwidth is filled with other information it will pause the video because it needs to buffer
b) Two reason why some web based videos do not play at all on a home computer is because the video is too long. Another reason is because the video is not produced enough so the video can not play.
c) There may be a great amount of audiences for opera, ballet, and plays because the web is does not have the same web-based materials as the real picture does in real life. A person can listen to plays and operas online but it is hard to get the real experience out of them. There may be a result of the availability of web-based materials because there are so many people at the art galleries, operas, ballets, and plays because there are no seats and they are expensive.
3. a) is a kind of computer file that is structured as a sequence of lines. A text file exists within a computer file system.
b) A OCR can convert handwriting to a text file through the computer file. The OCR can convert the handwriting and plates to text files which then can be edited as if they had been typed. The software can sort numbers which then can be read. The information needs to be scanned in order to get onto the computer.
c) The conversion process may not be accurate using OCR techniques because when being converted the files may be confused due to inacurate information, for example if there are scratches or discoloration. The conversion process may be inaccurate using OCR as well if there is a lower case l, L, and a 1, one.
Thursday, April 14, 2011
Tuesday, April 12, 2011
1. a) Two tasks performed by a network server apart from the storage of users' files is gives information to all of the other computers in the company. Also, a network server can send and receive emails.
b) One advantage of schools providing their students with USB drives is that they know the students have the right amount of storage. A disadvantage is that if a student loses the usb the school will have to replace them.
c) Two precautions that a student should take when using USB drives for saving important work would be that they need to make sure that they do not take out the USB drive to quickly because the information won't save. Also, they should make sure not to break the USB.
4. a) i) The software that has provided this wizard is database
ii) one other task that may be performed by this wizard is query’s
b) Two other IT methods that can help them to use the application software successfully are going onto the internet and looking up a tutorial to help them understand. Also, databases.
c) It is the responsibility of the company, rather than the employee, to pay for the training because the company is the one who wants these people to train and the employees are only told what to do making it so that the company is the one in charge to pay for the training. If, for an instance, employees want to learn additional skills to improve their work and potentially earn a raise the company should not pay for this. The company shouldn't pay for this because this is their own personal training for more money that they want/need which is not up to the company. The employee should pay for their own training if they want a raise because it is the money they are raising for themselves not the company.
5. a) i) terabyte- A terabyte is a multiple of the unit byte for digital information.
ii) GPS, which stands for Global Positioning System, is a radio navigation system that allows land, sea, and airborne users to determine their exact location, velocity, and time 24 hours a day, in all weather conditions, anywhere in the world
b) The steps involved in capturing and storing the satellite image data that will be used to create the maps in google earth are that the camera needs to be involved in order to take the picture. Then all of the pictures must be uploaded to the software and then shared.
c) GPS technology and mapping software work together to allow the operator to find the way to a destination, by working together like on a mobile phone by have the information installed into the phone. The phone will need internet service of course but the satellite can pick up the phone signal and that is how they work together.
d) To a great extent is this decision to alter the maps at users' requests acceptable because people may feel uncomfortable with their houses on the internet and on other peoples phones. This is an issue of security for them because viewing houses is acceptable. If the decision to alter the maps at users requests becomes acceptable this would allow more people to use google maps because they will feel comfortable. Also, this may be a disadvantage because people will see blurred out thing and not know the actual directions.
b) One advantage of schools providing their students with USB drives is that they know the students have the right amount of storage. A disadvantage is that if a student loses the usb the school will have to replace them.
c) Two precautions that a student should take when using USB drives for saving important work would be that they need to make sure that they do not take out the USB drive to quickly because the information won't save. Also, they should make sure not to break the USB.
4. a) i) The software that has provided this wizard is database
ii) one other task that may be performed by this wizard is query’s
b) Two other IT methods that can help them to use the application software successfully are going onto the internet and looking up a tutorial to help them understand. Also, databases.
c) It is the responsibility of the company, rather than the employee, to pay for the training because the company is the one who wants these people to train and the employees are only told what to do making it so that the company is the one in charge to pay for the training. If, for an instance, employees want to learn additional skills to improve their work and potentially earn a raise the company should not pay for this. The company shouldn't pay for this because this is their own personal training for more money that they want/need which is not up to the company. The employee should pay for their own training if they want a raise because it is the money they are raising for themselves not the company.
5. a) i) terabyte- A terabyte is a multiple of the unit byte for digital information.
ii) GPS, which stands for Global Positioning System, is a radio navigation system that allows land, sea, and airborne users to determine their exact location, velocity, and time 24 hours a day, in all weather conditions, anywhere in the world
b) The steps involved in capturing and storing the satellite image data that will be used to create the maps in google earth are that the camera needs to be involved in order to take the picture. Then all of the pictures must be uploaded to the software and then shared.
c) GPS technology and mapping software work together to allow the operator to find the way to a destination, by working together like on a mobile phone by have the information installed into the phone. The phone will need internet service of course but the satellite can pick up the phone signal and that is how they work together.
d) To a great extent is this decision to alter the maps at users' requests acceptable because people may feel uncomfortable with their houses on the internet and on other peoples phones. This is an issue of security for them because viewing houses is acceptable. If the decision to alter the maps at users requests becomes acceptable this would allow more people to use google maps because they will feel comfortable. Also, this may be a disadvantage because people will see blurred out thing and not know the actual directions.
Monday, April 4, 2011
Bike rentals
a) Identify two IT features of a smart card.
Two features of a smart card would be that it has the information of the person for example, credit card number and contact information. The second feature of a smart card would be there is a specific PIN to access this smart card so that the information on the smart card would not be accessed.
b) Describe the process to authenticate the cyclist when collecting a bike.
The process to authenticate the cyclist when collecting a bike would be to get all of the information of the person onto a database. Some information would be credit card number, license, contact information to make sure that this person is in possession of the bike that they are renting. When they give all of the information they are then given a PIN number to secure that the bike they had rented was theres and not another person.
c) When a bike is rented, information about the bike and cyclist are sent to the central database, With reference to the diagram below, explain the benefits of using a relational database instead of a flate-file database.
The benefits of using a relational database is to stay more organized, which would allow you to place information into every catagory, i.e. bikes, rentals and cyclists, and to make records easy to access, meaning that oone can view the database at anytime with comprehensibly categories.
d) Discuss the privacy and security concerns that could arise through the use of a database to record bike rentals.
The privacy and security concerns that could arise through the use of a database to record bike rentals through alot of possibilities. Some possibilities for security concerns are loss of pin card, theft of the card, and if the customer were to show up with out their card. Some privacy concerns are the fact if the thieve were to claim the identity of the actual customer. When listing the concerns of both security and privacy, security seems to put weigh privacy, because the possibilities to loose the card and in turn the customer's entire access to their account at the business. The biggest privacy concerns were pin card theft because the pin card has all of the customers information on it that is vital to their security.
Two features of a smart card would be that it has the information of the person for example, credit card number and contact information. The second feature of a smart card would be there is a specific PIN to access this smart card so that the information on the smart card would not be accessed.
b) Describe the process to authenticate the cyclist when collecting a bike.
The process to authenticate the cyclist when collecting a bike would be to get all of the information of the person onto a database. Some information would be credit card number, license, contact information to make sure that this person is in possession of the bike that they are renting. When they give all of the information they are then given a PIN number to secure that the bike they had rented was theres and not another person.
c) When a bike is rented, information about the bike and cyclist are sent to the central database, With reference to the diagram below, explain the benefits of using a relational database instead of a flate-file database.
The benefits of using a relational database is to stay more organized, which would allow you to place information into every catagory, i.e. bikes, rentals and cyclists, and to make records easy to access, meaning that oone can view the database at anytime with comprehensibly categories.
d) Discuss the privacy and security concerns that could arise through the use of a database to record bike rentals.
The privacy and security concerns that could arise through the use of a database to record bike rentals through alot of possibilities. Some possibilities for security concerns are loss of pin card, theft of the card, and if the customer were to show up with out their card. Some privacy concerns are the fact if the thieve were to claim the identity of the actual customer. When listing the concerns of both security and privacy, security seems to put weigh privacy, because the possibilities to loose the card and in turn the customer's entire access to their account at the business. The biggest privacy concerns were pin card theft because the pin card has all of the customers information on it that is vital to their security.
Friday, April 1, 2011
Politics and government
a) intellectual property is when someone claims ownership to and idea or theory that they invented.
b) Two services that an ISP provides the service of lease server space for smaller businesses and host other people servers, which allows then a separate server for custom uses, and to provide cable and internet to a house hold, i.e. version fios
C) Two ways a home computer network could be adversely affected by the use of file sharing services is that the network is not secure. This means that the home computer network does not have a safe password. Another way which home computer network could be adversely affected by the use of file sharing services is that the website that the file sharing is going on in, example sending emails, posting on social networking sites, are not secure and this information could easily be broken into because it is not secured. There are viruses as well and the quality is not as great.
D) If the government starts to regulate the use of P2P sites for file sharing this would have a great effect on the music industry. For one, jobs in the music industry could decrease because the government would have control on file sharing because music would not be bought. Another possible implication would be that some people would start to download music for free instead of file sharing, which is illegal, but they have no other options. If the government starts to regulate P2P file sharing that would mean that people would not be able to download music meaning that the music industry would get more money. If the government regulates the use of P2P files being shares this would help the music industry get more money.
b) Two services that an ISP provides the service of lease server space for smaller businesses and host other people servers, which allows then a separate server for custom uses, and to provide cable and internet to a house hold, i.e. version fios
C) Two ways a home computer network could be adversely affected by the use of file sharing services is that the network is not secure. This means that the home computer network does not have a safe password. Another way which home computer network could be adversely affected by the use of file sharing services is that the website that the file sharing is going on in, example sending emails, posting on social networking sites, are not secure and this information could easily be broken into because it is not secured. There are viruses as well and the quality is not as great.
D) If the government starts to regulate the use of P2P sites for file sharing this would have a great effect on the music industry. For one, jobs in the music industry could decrease because the government would have control on file sharing because music would not be bought. Another possible implication would be that some people would start to download music for free instead of file sharing, which is illegal, but they have no other options. If the government starts to regulate P2P file sharing that would mean that people would not be able to download music meaning that the music industry would get more money. If the government regulates the use of P2P files being shares this would help the music industry get more money.
Wednesday, March 30, 2011
Area of Impact: Science and the Environment
5. A) two possible ways to detect a vehicle are motion sensors and speed guns
B) two ways in which the active traffic management system could help decrease journey time is the diffusion of traffic, meaning that cars would instead take alternate routes in order to get to their destination, and in decreasing jams, meaning if the drivers are alerted ahead of time of what lanes are closed, there will be no last minute chaos to merge into the non-closed lanes.
C) The images from the digital speed cameras can be used to send penalty notices to speeding drivers automatically by using databases and cameras. The camera would get a picture of the car, with the license plate, and go through the database and send a penalty notice to the information that was found. Since the camera is higher then the car, the person driving would be able to be seen, the license plate, and it would show how fast that the person was going compared to the speed limit.
D) The active traffic management system could be abused by the authorities because they could see the person driving, how fast they were going, and if they have been speeding before. Also, the authorities could keep these people that get tickets a lot in mind and use this to their advantage for the future. Seeing the person driving would be helpful towards the authorities because they would be able to recognize this person when the ticket is being sent. How fast they are going could be used to their advantage because they would easily be able to tell if they were speeding or not and whether or not they need a ticket. The authorities would be able to look back in the databases and see if this person has had previous tickets. All of these possibilities could be bad for the authorities because they could easily take advantage of these possibilities and use the data and information that they got against this person. Since they have all of this persons information on the database this could be potentially abused because all of the information on the person speeding would be able to be seen. I believe that looking through the database and seeing if this person has had other incidents of speeding isn't as bad as looking at the person driving and getting all of their information. Using thee traffic management systems are not sufficient and are invasive unlike when people are regularly pulled over for speeding in front of an actual cop. Using these systems on the highway is very invasive and a great amount of people speed on the highway and they are being caught on camera and not by an actual police which is wrong.
B) two ways in which the active traffic management system could help decrease journey time is the diffusion of traffic, meaning that cars would instead take alternate routes in order to get to their destination, and in decreasing jams, meaning if the drivers are alerted ahead of time of what lanes are closed, there will be no last minute chaos to merge into the non-closed lanes.
C) The images from the digital speed cameras can be used to send penalty notices to speeding drivers automatically by using databases and cameras. The camera would get a picture of the car, with the license plate, and go through the database and send a penalty notice to the information that was found. Since the camera is higher then the car, the person driving would be able to be seen, the license plate, and it would show how fast that the person was going compared to the speed limit.
D) The active traffic management system could be abused by the authorities because they could see the person driving, how fast they were going, and if they have been speeding before. Also, the authorities could keep these people that get tickets a lot in mind and use this to their advantage for the future. Seeing the person driving would be helpful towards the authorities because they would be able to recognize this person when the ticket is being sent. How fast they are going could be used to their advantage because they would easily be able to tell if they were speeding or not and whether or not they need a ticket. The authorities would be able to look back in the databases and see if this person has had previous tickets. All of these possibilities could be bad for the authorities because they could easily take advantage of these possibilities and use the data and information that they got against this person. Since they have all of this persons information on the database this could be potentially abused because all of the information on the person speeding would be able to be seen. I believe that looking through the database and seeing if this person has had other incidents of speeding isn't as bad as looking at the person driving and getting all of their information. Using thee traffic management systems are not sufficient and are invasive unlike when people are regularly pulled over for speeding in front of an actual cop. Using these systems on the highway is very invasive and a great amount of people speed on the highway and they are being caught on camera and not by an actual police which is wrong.
expert system
Expert System- An expert system is software that uses a knowledge base of human expertise for problem solving, or clarify uncertainties where normally one or more human experts would need to be consulted.
Examples:
1. http://classic.mapquest.com/
2. http://www.webmd.com/
3. http://ask.com/
Artificial Intelligence- Artificial intelligence (AI) is the intelligence of machines and the branch of computer science that aims to create it.
Examples:
1. http://en.wikipedia.org/wiki/File:TOPIO_3.0.jpg
2. http://en.wikipedia.org/wiki/Baseball_robot
3. WII
4. KINECT
Examples:
1. http://classic.mapquest.com/
2. http://www.webmd.com/
3. http://ask.com/
Artificial Intelligence- Artificial intelligence (AI) is the intelligence of machines and the branch of computer science that aims to create it.
Examples:
1. http://en.wikipedia.org/wiki/File:TOPIO_3.0.jpg
2. http://en.wikipedia.org/wiki/Baseball_robot
3. WII
4. KINECT
Monday, March 28, 2011
tutorials
2. a) multimedia- multimedia is the integration of multiple forms of media. This includes text, graphics, audio, video, etc.
b) Two methods that can be used to reduce the amount of disk space occupied by a multimedia training package would be having the CD-ROM have more space so that more information could be stored. Another would be putting the information onto a press file, or compress the training package, into a zipped folder. To do this you would create the compressed folder and then cut and paste the information.
c) Some organizations prefer to train their staff using a multimedia training package instead of providing face to face training with a human instructor because the online multimedia training package would let the trainee learn on their own time. Face to face training might also be harder to have an appointment to actually train. having the multimedia training package online would be easier because there would be no need for an appointment because the internet is free all the time. Also, the trainee wouldn't have to use a car in order to meet face to face to train and neither would the trainer.
b) Two methods that can be used to reduce the amount of disk space occupied by a multimedia training package would be having the CD-ROM have more space so that more information could be stored. Another would be putting the information onto a press file, or compress the training package, into a zipped folder. To do this you would create the compressed folder and then cut and paste the information.
c) Some organizations prefer to train their staff using a multimedia training package instead of providing face to face training with a human instructor because the online multimedia training package would let the trainee learn on their own time. Face to face training might also be harder to have an appointment to actually train. having the multimedia training package online would be easier because there would be no need for an appointment because the internet is free all the time. Also, the trainee wouldn't have to use a car in order to meet face to face to train and neither would the trainer.
Thursday, March 24, 2011
Wii Console
A) Identify two limitations of the Wii as a simulation- Two limitations of the Wii as a simulation are the simulations that it offers are meant for the sole purpose of entertainment and the simulations could not be to scale, with exaggerations. The real world is complex while the wii simulation is very simplistic. The wii is 2D not 3D like the real world.
B) Describe two other potential uses of the technology incorporated within the Wii video game console- Two other potential uses of the technology incorporated within the Wii video game console are the ability to play DVDs or blue rays, which can be done through inserting the disc into the CD port, also it has the ability to go onto the internet to go to video sites such as YouTube, this is done through, selecting the internet button on the menu.
C) Explain how two devices that are not physically connected can communicate with each other- Two devices that are not physically connected but can communicate it through wireless connection. Since modern wireless devises use speed there are wireless networks that the two devices can connect with. For example, the Wii controller connects to the Wii console. They both have the same network communication so both devices know where they are going which makes them able to be wireless without having to be physically connected. Inferred, radio frequencies, blue tooth, micro waves,
D) Evaluate the role of video game consoles in the healthcare of the elderly- Video consoles in the healthcare of the elderly are being used across nursing homes in North American, Europe, and Australia. The role of video game consoles in the healthcare of the elderly could be used for mental health, physical health, and fun. The video games could be used for mental health because the video game would get the elderly person away, mentally, in their life and forget about losing their families etc. Physical health would be a benefit from the game console because they would be getting exercise because the Wii is a physical game and uses motion sensors. Fun is also another benefit from the game console because being in a nursing home all day is very depressing when people do not come to visit you. So, using the game console would help the elderly people have fun without leaving as well. A negative about the game console would be that mentally, the elderly person might get very frustrated and they might not want to play the game anymore or get mad at other people in the nursing home. The game is very physical so if the elderly person is playing wii sports they will need to be in pretty good shape in order to play for a while and if they don't play for a moderate time they might get sick or fall. Fun and physical activity in the game outweighs mental because in a nursing home the elderly people need to be able to have fun without leaving. Mental wouldn't be as strong as fun and physical activity because the elderly need to stay fit and physical because sitting around all day in a nursing home without exercise is not healthy.
B) Describe two other potential uses of the technology incorporated within the Wii video game console- Two other potential uses of the technology incorporated within the Wii video game console are the ability to play DVDs or blue rays, which can be done through inserting the disc into the CD port, also it has the ability to go onto the internet to go to video sites such as YouTube, this is done through, selecting the internet button on the menu.
C) Explain how two devices that are not physically connected can communicate with each other- Two devices that are not physically connected but can communicate it through wireless connection. Since modern wireless devises use speed there are wireless networks that the two devices can connect with. For example, the Wii controller connects to the Wii console. They both have the same network communication so both devices know where they are going which makes them able to be wireless without having to be physically connected. Inferred, radio frequencies, blue tooth, micro waves,
D) Evaluate the role of video game consoles in the healthcare of the elderly- Video consoles in the healthcare of the elderly are being used across nursing homes in North American, Europe, and Australia. The role of video game consoles in the healthcare of the elderly could be used for mental health, physical health, and fun. The video games could be used for mental health because the video game would get the elderly person away, mentally, in their life and forget about losing their families etc. Physical health would be a benefit from the game console because they would be getting exercise because the Wii is a physical game and uses motion sensors. Fun is also another benefit from the game console because being in a nursing home all day is very depressing when people do not come to visit you. So, using the game console would help the elderly people have fun without leaving as well. A negative about the game console would be that mentally, the elderly person might get very frustrated and they might not want to play the game anymore or get mad at other people in the nursing home. The game is very physical so if the elderly person is playing wii sports they will need to be in pretty good shape in order to play for a while and if they don't play for a moderate time they might get sick or fall. Fun and physical activity in the game outweighs mental because in a nursing home the elderly people need to be able to have fun without leaving. Mental wouldn't be as strong as fun and physical activity because the elderly need to stay fit and physical because sitting around all day in a nursing home without exercise is not healthy.
Thursday, March 10, 2011
two IB questions
3. Soon, many television stations will change from broadcasting on analogue airwaves to begin broadcasting only in digital. Digital broadcasting will allow stations to offer high resolution pictures and better sound quality as well as additional channels.
With digital TV, sounds and pictures from the broadcaster are converted into binary digits (bits) and sent though an aerial, satellite, telephone lone or cable. This digital signal is then turned back into sounds and pictures by a digital box or a digital TV set.
Some digital boxes have special access features such as subtitles, signing and audio description from people with hearing or sigh problems
However, recent improvements in Internet bandwidth and the increased availability of video through web sites such as youtube, have led to questions being raised about the need for additional digital channels.
a) Define the term resolutions- the degree of sharpness on a computer generator image as measured by the number of dots per linear inch in a hard – copy print out or the number of pixels across and down on a display screen.
b) Digital TV broadcasters are able to provide interactive serves. Describe two interactive services that could be provided with digital TV. -Two interactive services that could be provided with digital TV is that the person controlling the TV can pause and rewind live TV.
c)Explain two ways in which a domestic installation such as a digital TV can communicate with the digital provider- Two ways in which a domestic installation such as a digital TV can communicate with the digital provider is one, if you have commcast, for example, you could -purchase netflix over your digital TV. Another would be that ordering movies over your TV, not netflix, like what is provided for your digital TV company.
d) To what extent is the growth of video clips on the internet overtaking the need for digital TV.
To a great extent the growth of video clips on the internet is overtaking the need for digital TV. People no longer feel the need to have digital TV's if they can easily access a movie, for free, on their laptop or their computer at home. Sine laptops are brought everywhere by some people they could easily watch a movie by doing other work and not use a television. Since televisions cost money each month and wifi does not people have a greater chance of watching video clips on the internet then on digital tv.
4. A biotechnology company has been commissioned to develop a database to store genetic data on all citizens in Iceland for the purpose of medical research. The country was chosen because of its isolation and small population resulting in a small gene pool.
Citizens are required to give a blood sample which is processed to provide a genetic profile. The profile can then be matched with details such as age, weight, and medical history to predict potential future health issues that may be linked to the genetic backgrounds of individuals.
Data is made anonymous by replacing personal details with an ID number. This is used as a key field in the database. Some citizen have expressed concern about the collection of this data and have challenged its legality in court.
a) Define the term key field- Key field is a field in a record that holds unique data which identifies that record from all the other records in the file or database. Account number, product code and customer name are typical key fields. As an identifier, each key value must be unique in each record.
b) Describe the process used to create a query which would produce an alphabetical list of all the citizens who have suffered from diabetes, were born after 1990 and do not smoke. - The process use to create a query which would produce an alphabetical list of all the citizens who have suffered from diabetes, were born after 1990 and do not smoke would be that there would need to be a database. There would need to be a collection of all names, and how old they are, and if they do not smoke. All of this information would go into a database. If there needed to be a query of all the people who suffer from diabetes, were born after 1990 and do not smoke the person making the query would need to put this information into the database and then the query would spit out this information.
c)Explain the difference between data matching and data mining with reference to the icelandic database- Data mining- The process using sophisticated data search capability’s and statistical antilogarithms to discover patters and correlations in large, pre existing, databases while data matching.
Data matching- is comparing records in two different databases to find matches that answer a specif question.
These two have differences because while data ming processes sophisticated data matching compares records in two different databases.
d)To what extent do the advantages to medical research outweigh the concerns of some icelandic citizens about storage of their genetic data.
To a great extent does the advantages to medical research outweigh the concerns of some icelandic citizens about storage of their data because the database will have so much information of the icelandic citizens about their genetic data. This outweighs their concerns because they will know that they are safe and have all of their information stored onto a database and that if the government has any questions they will be able to pull up the database and answer those questions.
With digital TV, sounds and pictures from the broadcaster are converted into binary digits (bits) and sent though an aerial, satellite, telephone lone or cable. This digital signal is then turned back into sounds and pictures by a digital box or a digital TV set.
Some digital boxes have special access features such as subtitles, signing and audio description from people with hearing or sigh problems
However, recent improvements in Internet bandwidth and the increased availability of video through web sites such as youtube, have led to questions being raised about the need for additional digital channels.
a) Define the term resolutions- the degree of sharpness on a computer generator image as measured by the number of dots per linear inch in a hard – copy print out or the number of pixels across and down on a display screen.
b) Digital TV broadcasters are able to provide interactive serves. Describe two interactive services that could be provided with digital TV. -Two interactive services that could be provided with digital TV is that the person controlling the TV can pause and rewind live TV.
c)Explain two ways in which a domestic installation such as a digital TV can communicate with the digital provider- Two ways in which a domestic installation such as a digital TV can communicate with the digital provider is one, if you have commcast, for example, you could -purchase netflix over your digital TV. Another would be that ordering movies over your TV, not netflix, like what is provided for your digital TV company.
d) To what extent is the growth of video clips on the internet overtaking the need for digital TV.
To a great extent the growth of video clips on the internet is overtaking the need for digital TV. People no longer feel the need to have digital TV's if they can easily access a movie, for free, on their laptop or their computer at home. Sine laptops are brought everywhere by some people they could easily watch a movie by doing other work and not use a television. Since televisions cost money each month and wifi does not people have a greater chance of watching video clips on the internet then on digital tv.
4. A biotechnology company has been commissioned to develop a database to store genetic data on all citizens in Iceland for the purpose of medical research. The country was chosen because of its isolation and small population resulting in a small gene pool.
Citizens are required to give a blood sample which is processed to provide a genetic profile. The profile can then be matched with details such as age, weight, and medical history to predict potential future health issues that may be linked to the genetic backgrounds of individuals.
Data is made anonymous by replacing personal details with an ID number. This is used as a key field in the database. Some citizen have expressed concern about the collection of this data and have challenged its legality in court.
a) Define the term key field- Key field is a field in a record that holds unique data which identifies that record from all the other records in the file or database. Account number, product code and customer name are typical key fields. As an identifier, each key value must be unique in each record.
b) Describe the process used to create a query which would produce an alphabetical list of all the citizens who have suffered from diabetes, were born after 1990 and do not smoke. - The process use to create a query which would produce an alphabetical list of all the citizens who have suffered from diabetes, were born after 1990 and do not smoke would be that there would need to be a database. There would need to be a collection of all names, and how old they are, and if they do not smoke. All of this information would go into a database. If there needed to be a query of all the people who suffer from diabetes, were born after 1990 and do not smoke the person making the query would need to put this information into the database and then the query would spit out this information.
c)Explain the difference between data matching and data mining with reference to the icelandic database- Data mining- The process using sophisticated data search capability’s and statistical antilogarithms to discover patters and correlations in large, pre existing, databases while data matching.
Data matching- is comparing records in two different databases to find matches that answer a specif question.
These two have differences because while data ming processes sophisticated data matching compares records in two different databases.
d)To what extent do the advantages to medical research outweigh the concerns of some icelandic citizens about storage of their genetic data.
To a great extent does the advantages to medical research outweigh the concerns of some icelandic citizens about storage of their data because the database will have so much information of the icelandic citizens about their genetic data. This outweighs their concerns because they will know that they are safe and have all of their information stored onto a database and that if the government has any questions they will be able to pull up the database and answer those questions.
Wednesday, March 9, 2011
simulation- greenhouse
5. With potential increases in the cost of energy, many farmers in North America are concerned about the efficiency of their greenhouse. One possible solution is to use a greenhouse simulator to experiment with the different designs and materials in the construction of their greenhouses.
In simulation, users can vary inputs and when the simulation is run the results are displayed.
By using the results from a simulator to plan the building of greenhouses, farmers can reduce crops more efficiently and reduce their energy bills..
Many teachers find it useful to use simulations such as these in agricultural science classes.
A) From the simulation shown in the Diagram on the previous pages
I) identify one input- season
II) Identify one output- air temperature
B) Describe two tasks which must be performed in the development of simulation software like that used in the diagram on the previous page.
Two tasks which must be performed in the development of simulation software like that used in the diagram are data collection and collection of equations to make sure that the development of simulation can run.
C) Explain two advantages of using simulation to design products such as greenhouses.
One advantage of using simulation to design product such as greenhouses is that the way that plans grow in different climates would be able to be found. Another advantage of using simulation to design products such as greenhouses would be that if there is different water heights in a certain area using the greenhouses would be able to find how the weather changes.
D)To what extent are simulations such as this useful in enhancing the teaching and learning of a science subject?
To a great extent simulations such as this are useful in enhancing the teaching and learning of a science subject because the teachers would be able to explain to the children what happens to weather, plants, and air in different climates and different areas of the world. The teachers would be able to go to the greenhouses very easily because there are a lot and they are open. The teachers would be able to actually show the children what happens to the temperature if air goes up, or down, etc. The teachers would be able to explain to the children and have them actually see and feel the experiment without having to assume. The children will benefit from the greenhouses because the teachers will be able to enhance their teaching skills because it would be a physical test. The greenhouses will save time for the teachers as well because they will then be able to go and do a science subject in the greenhouse so that the children understand. The teacher's will also be able to gather data in the greenhouses, if the children aren't going to the greenhouse, and give the data to the children and that will also enhance teaching.
In simulation, users can vary inputs and when the simulation is run the results are displayed.
By using the results from a simulator to plan the building of greenhouses, farmers can reduce crops more efficiently and reduce their energy bills..
Many teachers find it useful to use simulations such as these in agricultural science classes.
A) From the simulation shown in the Diagram on the previous pages
I) identify one input- season
II) Identify one output- air temperature
B) Describe two tasks which must be performed in the development of simulation software like that used in the diagram on the previous page.
Two tasks which must be performed in the development of simulation software like that used in the diagram are data collection and collection of equations to make sure that the development of simulation can run.
C) Explain two advantages of using simulation to design products such as greenhouses.
One advantage of using simulation to design product such as greenhouses is that the way that plans grow in different climates would be able to be found. Another advantage of using simulation to design products such as greenhouses would be that if there is different water heights in a certain area using the greenhouses would be able to find how the weather changes.
D)To what extent are simulations such as this useful in enhancing the teaching and learning of a science subject?
To a great extent simulations such as this are useful in enhancing the teaching and learning of a science subject because the teachers would be able to explain to the children what happens to weather, plants, and air in different climates and different areas of the world. The teachers would be able to go to the greenhouses very easily because there are a lot and they are open. The teachers would be able to actually show the children what happens to the temperature if air goes up, or down, etc. The teachers would be able to explain to the children and have them actually see and feel the experiment without having to assume. The children will benefit from the greenhouses because the teachers will be able to enhance their teaching skills because it would be a physical test. The greenhouses will save time for the teachers as well because they will then be able to go and do a science subject in the greenhouse so that the children understand. The teacher's will also be able to gather data in the greenhouses, if the children aren't going to the greenhouse, and give the data to the children and that will also enhance teaching.
Tuesday, March 8, 2011
Questions of a new model
http://www.infectioncontroltoday.com/news/2011/03/program-provides-predictive-surveillance-models-for-infectious-disease-outbreak-scenarios.aspx
1. How well do the modelers understand the underlying science or theory (be it physics, chemistry, economics, or whatever) of the system being studied? How well understood are the relevant properties of the materials involved? How accurate and complete are the data?
The modelers understand the underlying science or theory of the system being studied because they are scientists and doctors. The people that are studying the system are researches. It is necessary that the modelers understand the relevant properties of the materials involved because in order to have the model work they are required to be able to work the model and understand what is happening. The model is not very accurate because the researchers write, "No single component can provide sufficient information for accurate predictions. Just because we detect an El Niño event, does not mean that a disease outbreak will occur. Similarly, if a vector is present in a locality, it does not mean that the pathogen is present or that disease will be transmitted to humans. Human activities may permit, exacerbate, or prevent human exposure to the risk of disease transmission." This shows that the model is not as accurate as they want it to be but it is still accurate once the model is exposed.
2. Models necessarily involve assumptions and simplifications of reality. What are the assumptions and simplifications in the model?
Models necessarily involve assumptions and simplifications of reality in the model. Assumptions of the models are that the model would not work to full capacity or correctly because of the researchers say that the model is not accurate all of the time. A simplifications of this model is that disease is a disease and this model just tells when there is going to be a disease which will help people figure out how to cure it, even though doctors do the same thing. "The program will continue to advocate for focused, pre-emptive public health action to prevent or mitigate human morbidity and mortality, as well as the destabilizing effects of infectious disease outbreaks." This shows that the program will help diseases and when they are coming which is usually what a doctor does so this could be used as a simplification.
3. How closely do the results or predictions of the model correspond with results from physical experiments or real experience?
The results of the model correspond with results from physical experiments because the model will continue to advocate for focused, pre-emptice public health action to prevent or mitigate human morbidity and mortality. This model with stop the outbreaks of disease. The results are very close even though the model is not 100% accurate. "The researchers add that success of predictive surveillance will depend on the recognition that it is founded on a meta-system of different surveillance activities, linked by communications, coordination and collaboration between multiple, diverse disciplines, and producing advisories and alerts, which have progressively more certainty over the course of an outbreak’s emergence. " The results of the model correspond with physical experiments and even though physical experiments would probably be used in a better manner then the model the model can still detect once there is a disease.
1. How well do the modelers understand the underlying science or theory (be it physics, chemistry, economics, or whatever) of the system being studied? How well understood are the relevant properties of the materials involved? How accurate and complete are the data?
The modelers understand the underlying science or theory of the system being studied because they are scientists and doctors. The people that are studying the system are researches. It is necessary that the modelers understand the relevant properties of the materials involved because in order to have the model work they are required to be able to work the model and understand what is happening. The model is not very accurate because the researchers write, "No single component can provide sufficient information for accurate predictions. Just because we detect an El Niño event, does not mean that a disease outbreak will occur. Similarly, if a vector is present in a locality, it does not mean that the pathogen is present or that disease will be transmitted to humans. Human activities may permit, exacerbate, or prevent human exposure to the risk of disease transmission." This shows that the model is not as accurate as they want it to be but it is still accurate once the model is exposed.
2. Models necessarily involve assumptions and simplifications of reality. What are the assumptions and simplifications in the model?
Models necessarily involve assumptions and simplifications of reality in the model. Assumptions of the models are that the model would not work to full capacity or correctly because of the researchers say that the model is not accurate all of the time. A simplifications of this model is that disease is a disease and this model just tells when there is going to be a disease which will help people figure out how to cure it, even though doctors do the same thing. "The program will continue to advocate for focused, pre-emptive public health action to prevent or mitigate human morbidity and mortality, as well as the destabilizing effects of infectious disease outbreaks." This shows that the program will help diseases and when they are coming which is usually what a doctor does so this could be used as a simplification.
3. How closely do the results or predictions of the model correspond with results from physical experiments or real experience?
The results of the model correspond with results from physical experiments because the model will continue to advocate for focused, pre-emptice public health action to prevent or mitigate human morbidity and mortality. This model with stop the outbreaks of disease. The results are very close even though the model is not 100% accurate. "The researchers add that success of predictive surveillance will depend on the recognition that it is founded on a meta-system of different surveillance activities, linked by communications, coordination and collaboration between multiple, diverse disciplines, and producing advisories and alerts, which have progressively more certainty over the course of an outbreak’s emergence. " The results of the model correspond with physical experiments and even though physical experiments would probably be used in a better manner then the model the model can still detect once there is a disease.
Friday, March 4, 2011
p. 171-181 Gift of Fire
Questions:
4.5-1. How well do the modelers understand the underlying science or theory (physics, chemistry, economics, or whatever) of the system being studied? How well understood are the relevant properties of the materials involved? How accurate and complete are the data?
2. Models necessarily involve assumptions and simplifications of reality. What are the assumptions and simplifications in the model?
3. How closely do the results or predictions of the model correspond with results from physical experiments or real experience?
4.6-One simplification in the car crash models is a grid. This grig circles the earth, rises through the atmosphere, and goes into the ocean. The program solves equations for each grid point and element for specified time intervals. The simplification in the climate models is greenhouses. These make global warming predictions and they use computer models to distinguish climate.
4.25-An argument in his defense would be that he has been working for 25 years and that he knows what he is doing. He wouldn't make a decision that would put anything or anyone in harm and has good judgment on the weather because he has been working as a fire control burner for 25 years. An argument in support of his boss would be that they spent money on the computer models to tell the fire department exactly when it was a good time to burn the bush. The man could have easily mistaken the wind and used bad judgment while the computer model would not.
4.26-A) Yes, my decision about awarding money to the plaintiff would be affected by the company's policy about testing because if sometimes computers can mess up and if the testing is done with a computer and not physically the company would not know for sure but if it was done physically it would be alot easier to be able to know if anything could go wrong with the product.
B) Yes, my decision would be affected because if there were injuries whether the product was tested physically or through computer there were still injuries. This shows me that the product is not 100% safe if it is done with a computer or physically.
4.28-I believe that models that can predict the effect of an income tax change on government revenue would be very accurate with results because this is a very serious matter and governments might want to use this.
I believe that models that predict the position of the moon in relation to the earth, 30 years from now, would be accurate because if the testing is done everyday and was measured it would be easily done to do mathematically.
I believe that models that predict how much optical fiber will be needed in a major city from 30 years from now would not be accurate because population changes.
I believe that models that predict how much CO2 will be emitted worldwide by burning fossil fuel for energy 50 years from now will not be accurate because fossils are very old and can not be completely trusted.
I believe that models that can predict the speed of a new racing boat hull design under specific wind conditions would have correct accuracy because if tests are done with the boat in every type of windspeed it would be accurate.
4.5-1. How well do the modelers understand the underlying science or theory (physics, chemistry, economics, or whatever) of the system being studied? How well understood are the relevant properties of the materials involved? How accurate and complete are the data?
2. Models necessarily involve assumptions and simplifications of reality. What are the assumptions and simplifications in the model?
3. How closely do the results or predictions of the model correspond with results from physical experiments or real experience?
4.6-One simplification in the car crash models is a grid. This grig circles the earth, rises through the atmosphere, and goes into the ocean. The program solves equations for each grid point and element for specified time intervals. The simplification in the climate models is greenhouses. These make global warming predictions and they use computer models to distinguish climate.
4.25-An argument in his defense would be that he has been working for 25 years and that he knows what he is doing. He wouldn't make a decision that would put anything or anyone in harm and has good judgment on the weather because he has been working as a fire control burner for 25 years. An argument in support of his boss would be that they spent money on the computer models to tell the fire department exactly when it was a good time to burn the bush. The man could have easily mistaken the wind and used bad judgment while the computer model would not.
4.26-A) Yes, my decision about awarding money to the plaintiff would be affected by the company's policy about testing because if sometimes computers can mess up and if the testing is done with a computer and not physically the company would not know for sure but if it was done physically it would be alot easier to be able to know if anything could go wrong with the product.
B) Yes, my decision would be affected because if there were injuries whether the product was tested physically or through computer there were still injuries. This shows me that the product is not 100% safe if it is done with a computer or physically.
4.28-I believe that models that can predict the effect of an income tax change on government revenue would be very accurate with results because this is a very serious matter and governments might want to use this.
I believe that models that predict the position of the moon in relation to the earth, 30 years from now, would be accurate because if the testing is done everyday and was measured it would be easily done to do mathematically.
I believe that models that predict how much optical fiber will be needed in a major city from 30 years from now would not be accurate because population changes.
I believe that models that predict how much CO2 will be emitted worldwide by burning fossil fuel for energy 50 years from now will not be accurate because fossils are very old and can not be completely trusted.
I believe that models that can predict the speed of a new racing boat hull design under specific wind conditions would have correct accuracy because if tests are done with the boat in every type of windspeed it would be accurate.
Wednesday, February 9, 2011
Class work 2/9/11
^This article is about the cameras that are being invented and put in at more places in D.C. The cameras are being put in at cross walks, lights, stop signs, to make sure that people are following the rules of the road.
1. How did the IT development emerge?
The IT development emerged from people in DC not listening to the rules of the road. The police want more people to be aware and are having cameras put into stop signs, lights, yield signs, and even cross walks to make sure people are following the rules of the road.
2. Who are the stakeholders—individuals, institutions, societies who initiate and control the IT developments and are affected by them?
Everyone is affected by this IT development, the cameras. Individuals driving will be affected if they do not pay attention to the rules of the road. The DC government and the police are the people who have control of the IT development.
3. What are the advantages and disadvantages for the stakeholders?
Some advantages of the stakeholders are that they will be able to see that if they are speeding how they are a threat to the road. The stakeholders will be able to see in their neighborhood and see if there is crime and become safe if there is. Some disadvantages for the stakeholders are that they are being watched and this makes them feel uncomfortable. They are being seen on the road and how they drive and could get later tickets because of the rules that they have broken. This is a privacy violation to them because the camera can see where they are going and it isn't that safe because of this.
4. What feasible solutions can be applied to overcome problems?
The feasible solutions that can be applied to overcome the problems are that the cameras could only get the license plate number. They should be in highly populated areas to decrease the number of accidents because if they are in a highly populated area more lives could be saved because the cameras prevent accidents. Another problem that could be fixed is not doing them in areas which aren't as important like a street because people get upset.
5. What is the social impact of the IT development on human life? This may include some or all of the following areas: economic, political, cultural, legal, environmental, ergonomic, health and psychological.
psychological impact is that the people always feel like they are being watched which is very uncomfortable. A legal impact is hat the people of DC might start lawsuits because of unlawful calls such as not yielding for a person on a cross walk. The lawsuits might cause great problems because it would not be a good name for the government for even putting in all of these cameras. Environmental issue is that if these cameras are on all of the time they are taking a lot of energy which some people might find defensive and not like.
Monday, February 7, 2011
photoshop
I think it is ok to use photoshop technology on pictures such as for magazines. Yes, this might make the person behind the camera uncomfortable but the photoshop is being used to make the person look better. I do not think that it is ok to use photoshop technology on pictures such as on Facebook or other social networking sights. The people on Facebook are "real" for the most part and when friends are trying to find them they are supposed to look like what they look like because they are not celebrities. But on the other hand, I feel like photoshop shouldn't be used at all because it is disrespectful to those behind the camera. Photoshop makes people look completely different and changes everything about them.
Wednesday, February 2, 2011
Chapter 6
6.6-Describe two technical means of protecting copyright of intellectual property on the web.
- one technical mean of protecting copy right of intellectual property on the web is the nature of a new program, or a new kind of program. A second would be the practical consequences of each choice in terms of encouraging innovation of production of new products.
6.8-Describe two things the entertainment industry has done to protect its copyrights. For each, tell whether you think it is justified. Give reason.
-One thing that the entertainment industry has done to protect its copyrights is they gave gone to court. Congress passed the Digital Millennium Copyright Act and this law prohibits the making, distributing, or using of tools (devices, software, or services) to circumvent technological copyright protection systems used by copyright holders. Another thing that the entertainment industry has done to protect its copyright is the software is hard to download.
6.22- Compare the following statements. Are they equally valid? Why or why not? Is home burglary a good analogy for disabling copy protection? Why or why not?
-No the statements below are not equally valid. A lock on your door is just the same as what you have produced. You wouldn't put a weak lock on your door knowing that somebody could break in and take what you have. A burglary is a good analogy for disabling copy protections because a burglar goes into your house where you keep things that need to be protected and when someone hacks and the copy right is avoided they are taking your ideas.
6.24-Thomas Jefferson and several modern writers used fire as an analogy for copying intellectual property: We can light many candles from one without diminishing the light of heat obtained fro the first candle. Suppose a group of people go camping in the wilderness using primitive methods. One person gets a fire started. Other want to start their fire from hers. Can you think of any ethical practical reasons why they should be expected to trade something, perhaps some wild fruit they found, for the use of the fire?
-Yes it would be an ethical decision to trade something because that would be the right thing to do because then they had their shelter. This would be the same as copying intellectual property because they used the same things which would make it so they need to share because that's the right thing to do.
- one technical mean of protecting copy right of intellectual property on the web is the nature of a new program, or a new kind of program. A second would be the practical consequences of each choice in terms of encouraging innovation of production of new products.
6.8-Describe two things the entertainment industry has done to protect its copyrights. For each, tell whether you think it is justified. Give reason.
-One thing that the entertainment industry has done to protect its copyrights is they gave gone to court. Congress passed the Digital Millennium Copyright Act and this law prohibits the making, distributing, or using of tools (devices, software, or services) to circumvent technological copyright protection systems used by copyright holders. Another thing that the entertainment industry has done to protect its copyright is the software is hard to download.
6.22- Compare the following statements. Are they equally valid? Why or why not? Is home burglary a good analogy for disabling copy protection? Why or why not?
-No the statements below are not equally valid. A lock on your door is just the same as what you have produced. You wouldn't put a weak lock on your door knowing that somebody could break in and take what you have. A burglary is a good analogy for disabling copy protections because a burglar goes into your house where you keep things that need to be protected and when someone hacks and the copy right is avoided they are taking your ideas.
6.24-Thomas Jefferson and several modern writers used fire as an analogy for copying intellectual property: We can light many candles from one without diminishing the light of heat obtained fro the first candle. Suppose a group of people go camping in the wilderness using primitive methods. One person gets a fire started. Other want to start their fire from hers. Can you think of any ethical practical reasons why they should be expected to trade something, perhaps some wild fruit they found, for the use of the fire?
-Yes it would be an ethical decision to trade something because that would be the right thing to do because then they had their shelter. This would be the same as copying intellectual property because they used the same things which would make it so they need to share because that's the right thing to do.
Art, ent, leis practice
2. An author writes IT text books at home using his PC. He illustrates his work with many screen
shots and images obtained from web sites, showing readers how to carry out various actions.
He sends the images as bitmapped files. He sends his work to a publisher using his broadband
internet connections.
A) Define the term bandwidth: Bandwidth is the transmission capacity of an electronic communications device. Bandwidth is the speed of data transfer.
[2 marks]
B) Describe one advantage and one disadvantage of sending the images as bitmapped files instead of vector graphic files.
-One advantage of sending the images as bitmapped files instead of vector graphic files would be that it can contain width, height, and resolution, both monochrome and color, in various color depths, and optionally with data compression, alpha channels, and color profiles in the image.
-One disadvantage of sending the images as bitmapped files instead of vector graphic files would be that vectors magnify more clean while Bitmapped images get very pixy and un-clear.
[4 marks]
C) With reference to one benefit and one problem, explain why there may be advantages and disadvantages for an author when working from home instead of in the publisher's office.
One advantage for an author when working from home instead of in the publisher's office would be that he would feel comfortable in his own home. One disadvantage for an author when working from home instead of in the publisher's office would be that he could get very distracted because there are distractions in one's house.
[4 marks]
4. Digital audio players such as iRiver and iPod, shown below, have given individuals access to huge
amounts of data storage, which is both affordable and portable. Using these digital audio players,
people are able to download MP3 files from the internet. These files are generally encoded at a bit
rate of 128 Kbit/s- which is regarded as "good enough". Digital jukebox software, such as Itunes,
then allows users to manage their files on these storage devices.
A) Define the term MP3: The Term MP3 is the file extension for MPEG Audio Layer-3, a set of standards for compressing and downloading audio files from the internet.
[2 marks]
B) Describe two tasks a user can perform with digital jukebox software.
- One task a user can perform with digital jukebox software is that the user would be able to listen to the music that they like.
- Another task a user can perform with digital jukebox software is that the user can burn the songs onto a CD and share from itunes and also organize the songs.
[4 marks]
C) Explain the implication of bit rate when downloading music.
The implication of a bite rate when downloading music is that the song won't download all the way and it will take a long time to download. Also the download blocks out the bandwidth and slows down.
[4 marks]
D) Evaluate the impact digital audio players have had on the music industry.
The impact of digital audio players on the music industry is great. The musicians use CD's to get their songs out but now that they can be downloaded the musician doesn't get as much credit. There are people who get the CD and then download the CD to their Itunes and then pass on the CD for another person. This impacts the music industry because the CD is getting passed on and not enough people are buying the CD's. There are also free downloads that people use. This has a impact on the music industry because the musician isn't getting enough money or credit.
[10 mark]
shots and images obtained from web sites, showing readers how to carry out various actions.
He sends the images as bitmapped files. He sends his work to a publisher using his broadband
internet connections.
A) Define the term bandwidth: Bandwidth is the transmission capacity of an electronic communications device. Bandwidth is the speed of data transfer.
[2 marks]
B) Describe one advantage and one disadvantage of sending the images as bitmapped files instead of vector graphic files.
-One advantage of sending the images as bitmapped files instead of vector graphic files would be that it can contain width, height, and resolution, both monochrome and color, in various color depths, and optionally with data compression, alpha channels, and color profiles in the image.
-One disadvantage of sending the images as bitmapped files instead of vector graphic files would be that vectors magnify more clean while Bitmapped images get very pixy and un-clear.
[4 marks]
C) With reference to one benefit and one problem, explain why there may be advantages and disadvantages for an author when working from home instead of in the publisher's office.
One advantage for an author when working from home instead of in the publisher's office would be that he would feel comfortable in his own home. One disadvantage for an author when working from home instead of in the publisher's office would be that he could get very distracted because there are distractions in one's house.
[4 marks]
4. Digital audio players such as iRiver and iPod, shown below, have given individuals access to huge
amounts of data storage, which is both affordable and portable. Using these digital audio players,
people are able to download MP3 files from the internet. These files are generally encoded at a bit
rate of 128 Kbit/s- which is regarded as "good enough". Digital jukebox software, such as Itunes,
then allows users to manage their files on these storage devices.
A) Define the term MP3: The Term MP3 is the file extension for MPEG Audio Layer-3, a set of standards for compressing and downloading audio files from the internet.
[2 marks]
B) Describe two tasks a user can perform with digital jukebox software.
- One task a user can perform with digital jukebox software is that the user would be able to listen to the music that they like.
- Another task a user can perform with digital jukebox software is that the user can burn the songs onto a CD and share from itunes and also organize the songs.
[4 marks]
C) Explain the implication of bit rate when downloading music.
The implication of a bite rate when downloading music is that the song won't download all the way and it will take a long time to download. Also the download blocks out the bandwidth and slows down.
[4 marks]
D) Evaluate the impact digital audio players have had on the music industry.
The impact of digital audio players on the music industry is great. The musicians use CD's to get their songs out but now that they can be downloaded the musician doesn't get as much credit. There are people who get the CD and then download the CD to their Itunes and then pass on the CD for another person. This impacts the music industry because the CD is getting passed on and not enough people are buying the CD's. There are also free downloads that people use. This has a impact on the music industry because the musician isn't getting enough money or credit.
[10 mark]
Thursday, January 6, 2011
(a) Pixel: the pixel is the smallest addressable screen element; it is the smallest unit of picture that can be controlled. Each pixel has its own address. The address of a pixel corresponds to its coordinates. Pixels are normally arranged in a two-dimensional grid, and are often represented using dots or squares.
Megabyte: the megabyte stores digital information or transmission with two different values depending on context
(b)One way that tourists on holidays can share digital photos with their family at home is that they can upload their photos onto a social networking site and then their family will be able to look at them. Another way that tourists on holidays can share digital photos with their family is they can upload the photos to the computer and then send them through email.
(c) One benefit in saving digital photos in jpg form is that jpg comprehends the photos and will wont lose much image quality. Another benefit is that jpg is very rare for losing digital images.
(d) Unlike traditional photos, digital photos are easily stores and distributed. Concerns mught arise from these developments because now pictures don't need to be sent through mail instead email and social networking. This might raise some concerns because people on social networking sites are allowed to see your pictures and it is unsafe for families. Some people don't need an account to see certain peoples profiles which is dangerous if your house is on the pictures or family and kids.
Megabyte: the megabyte stores digital information or transmission with two different values depending on context
(b)One way that tourists on holidays can share digital photos with their family at home is that they can upload their photos onto a social networking site and then their family will be able to look at them. Another way that tourists on holidays can share digital photos with their family is they can upload the photos to the computer and then send them through email.
(c) One benefit in saving digital photos in jpg form is that jpg comprehends the photos and will wont lose much image quality. Another benefit is that jpg is very rare for losing digital images.
(d) Unlike traditional photos, digital photos are easily stores and distributed. Concerns mught arise from these developments because now pictures don't need to be sent through mail instead email and social networking. This might raise some concerns because people on social networking sites are allowed to see your pictures and it is unsafe for families. Some people don't need an account to see certain peoples profiles which is dangerous if your house is on the pictures or family and kids.
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