Data: information in a form that can be read, used, and manipulated by a computer
information
Processing: an activity that manipulates and organizes information in ways that add value.
Hard disk: a rigid magnetically sensitive dik that spins rapidly and continuously inside computer chassis; used as a storage device
Disk drive: device used to retrieve information from a disk and in some cases to transfer data to it
Storage: long-term repository for data, disks and tapes are examples
-Primary: A computer's main memory
-Secondary: The category of computer storage found in peripherals such as tape and disk drives
-optical disk drive: a disk drive that uses laser beams to read and write bits of information on the surface of an optical disc
USB: (universal serial bus) a data path standard that theoritically allows up to 126 devices to be chained together from a single port, allowing for data transmission that is much faster and more flexible than through traditional serial and parallel ports
compatibility, interface standards, random access
RFID: Radio frequency identification
OCR: optical character recognition; locating and identifying printed characters embedded in an image, allowing the text to be stored as an editable document
OMR: optical mark reader; a reading device that uses reflected light to determine the location of pencil marks on standardized test answer sheets and similar forms.
Bar code: code consisting of a series of vertical bars of variable width that are scanned by a laser; an optical-machine readable representation of data
MFP: multifunction printer, an all-in-one output device that usually combines a scanner, a laser, or inkjet printer and a fax modem.
Sound card: a circuit board that allows the PC to accept microphone input, play music and other sound through speakers and headphones, and process sound in a variety of ways.
CRT: Cathode-ray tube; a computer display made from large electronic vacuum tube, similar to the classic television display
LCD: flat-panel displays, once primarily used for portable computers but now replacing bulkier CRT monitors for desktops
Resolution: Density of pixels, measured by the number of dots per inch dpi: dots per inch
Pixel: a picture element (d0t) on a computer screen or printout. Groups of pixels compuse the images on the monitor and the output of a printout
Baud: a speed of data transmission
Sensors: a device that enables digital machines to monitor a physical quantity of the analog world, such as temperature, humidity, or pressure, to provide data used in robotics, environmental climate control, and other applications.
Voice input: use of a microphone to speak commands and text data to a computer, which uses speech-recognition software to interpret the input
Speech recognition: the identification of spoken words and sentences by a computer, making it possible for voice input to be converted into text files.
Ergonomics: the science of designing work environments that enable people and things to interact efficiently and safely.
Repetitive-stress injuries: conditions that result from repeating the same movements over long periods, such as keyboarding-induced carpal tunnel syndrome, a painful affliction of the wrist and hand
Digitize: converting information into a digital form that can be stored in the computer's memory
Scanners: an input device that makes a digital representation of any printed image.
Digital cameras: a camera that captures images and stores them as bit patterns on disks or other digital storage media instead of using film
Vector graphics: the storag3e of pictures as collections of lines, shapes and other objects
MP3: a method of compression that can squeeze a music file to a fraction of its original CD file size with only a slight loss of quality MIDI: (Musical Instrument Digital Interface) a standard interface that allows electronic instruments and computers to communicate with each other and work together
Fire wire: industry standard for relatively new, extremely fast serial communications protocol, especially well suited for mulitmedia applications such as digital video
Thursday, December 24, 2009
Review Questions p. 97
5- What are the advantages of CRT monitors over LCD monitors?
CRT monitors would be harder to steal than an LCD monitor because they are heavier. Also, they were inexpensive and produce high-quality images at a variety of resolutions.
6- Name at least two hardware devices that use LCDs because using a CRT would be impractical.
Video projectors and laptop computers use LCD monitors because they are less bulky and can project computer screen images to large audiences.
CRT monitors would be harder to steal than an LCD monitor because they are heavier. Also, they were inexpensive and produce high-quality images at a variety of resolutions.
6- Name at least two hardware devices that use LCDs because using a CRT would be impractical.
Video projectors and laptop computers use LCD monitors because they are less bulky and can project computer screen images to large audiences.
Wednesday, December 23, 2009
HW
Article on peripherals:
http://http://news.yahoo.com/s/ap/20091223/ap_on_hi_te/us_tec_digital_life_tech_test_gaming_pcs_accessories;_ylt=AjMfGP6AQQWq2XS6z2KhAH4jtBAF;_ylu=X3oDMTNsamlrZHFpBGFzc2V0A2FwLzIwMDkxMjIzL3VzX3RlY19kaWdpdGFsX2xpZmVfdGVjaF90ZXN0X2dhbWluZ19wY3NfYWNjZXNzb3JpZXMEY3BvcwMzBHBvcwM5BHNlYwN5bl90b3Bfc3RvcnkEc2xrA3Jldmlld3NsaWNrYQ--
Questions:
Social Issues:
2- This new keyboard was invented by a man who was annoyed by the traditional QWERTY keyboard, and felt that a different keyboard would be easier to type with.
3- The stakeholders are the inventor, John Parkinson, any companies that choose to support/endorse his product, and the general public, who will need to be convinced that his keyboard is better than the standard one.
6- This new keyboard may not have that much impact on human life in general. This product may fail to interest the public and crash and burn as a project, losing the inventor time and money. While the style of the keyboard may be more healthy for the hands, if no one is interested in learning a new style of typing, there will be no point, especially when ergonomically designed QWERTY keyboards can be had.
7- The invention of this keyboard shows creativity on the part of the inventor, who had a problem and came up with a solution. The keyboard may gain some users locally, but it is doubtful that it will greatly affect the global community.
Ethical Issues:
1- An issue brought up with this new keyboard is reliability. Will this keyboard work as well as the QWERTY one? People have grown so used to this keyboard, that it will be very hard to change to a new style of typing.
2,3- John Parkinson is both responsible and accountable for making sure his new keyboard works properly, and gains market among the public.
4- I do not think that any policies, rules or laws apply to this situation.
http://http://news.yahoo.com/s/ap/20091223/ap_on_hi_te/us_tec_digital_life_tech_test_gaming_pcs_accessories;_ylt=AjMfGP6AQQWq2XS6z2KhAH4jtBAF;_ylu=X3oDMTNsamlrZHFpBGFzc2V0A2FwLzIwMDkxMjIzL3VzX3RlY19kaWdpdGFsX2xpZmVfdGVjaF90ZXN0X2dhbWluZ19wY3NfYWNjZXNzb3JpZXMEY3BvcwMzBHBvcwM5BHNlYwN5bl90b3Bfc3RvcnkEc2xrA3Jldmlld3NsaWNrYQ--
Questions:
Social Issues:
2- This new keyboard was invented by a man who was annoyed by the traditional QWERTY keyboard, and felt that a different keyboard would be easier to type with.
3- The stakeholders are the inventor, John Parkinson, any companies that choose to support/endorse his product, and the general public, who will need to be convinced that his keyboard is better than the standard one.
6- This new keyboard may not have that much impact on human life in general. This product may fail to interest the public and crash and burn as a project, losing the inventor time and money. While the style of the keyboard may be more healthy for the hands, if no one is interested in learning a new style of typing, there will be no point, especially when ergonomically designed QWERTY keyboards can be had.
7- The invention of this keyboard shows creativity on the part of the inventor, who had a problem and came up with a solution. The keyboard may gain some users locally, but it is doubtful that it will greatly affect the global community.
Ethical Issues:
1- An issue brought up with this new keyboard is reliability. Will this keyboard work as well as the QWERTY one? People have grown so used to this keyboard, that it will be very hard to change to a new style of typing.
2,3- John Parkinson is both responsible and accountable for making sure his new keyboard works properly, and gains market among the public.
4- I do not think that any policies, rules or laws apply to this situation.
Reading Review
1- List five input devices and three output devices that might be attached to a PC. Describe a typical use for each.
INPUT
Keyboard-sends signals to computer through cables, enters text and numeric data
Mouse-used to point at specific characters and objects
Optical Mark Reader- use reflected light to determine location of pencil marks on standardized tests
Bar Code Readers- use light to read UPCs, inventory codes and other codes created from patterns of variable width bars.
Touch Screen- responds when user points to or touches different regions on screen
OUTPUT
Monitor- displays information in computer on a screen for user to view and interact with
Projector-shows information from monitor onto a large board or other surface to make it easier for large audiences to view
Printer- transfers the information to paper
2-Name and describe three special-purpose input devices people commonly use in public places, such as stores, banks, and libraries.
People use touch screens in grocery stores when using the self-checkout. Also used are bar code readers to scan the goods being purchased and Radio frequency identification readers use radio waves to communicate with RFID tags. THey are used to identify cars at toll booths, library books at checkout counters, and are in the antitheft cards attached to clothes in department stores.
3- Many people find that the mouse is impractical for use as a pointing device on a laptop computer. Describe at least three alternatives that are more appropriate.
Three alternatives to a mouse on a laptop are touchpads, pointing sticks and trackballs. Touchpad is a small flat panel sensitive to light pressure. To use it, the user moves their finger across this pad. Pointing stick is a small handle in the centoer of the keyboard that responds to finger presser by moving pointer in the direction it is pushed. The trackball is like an upside-down mouse. It is stationary while user moves a large ball to control cursor on screen.
INPUT
Keyboard-sends signals to computer through cables, enters text and numeric data
Mouse-used to point at specific characters and objects
Optical Mark Reader- use reflected light to determine location of pencil marks on standardized tests
Bar Code Readers- use light to read UPCs, inventory codes and other codes created from patterns of variable width bars.
Touch Screen- responds when user points to or touches different regions on screen
OUTPUT
Monitor- displays information in computer on a screen for user to view and interact with
Projector-shows information from monitor onto a large board or other surface to make it easier for large audiences to view
Printer- transfers the information to paper
2-Name and describe three special-purpose input devices people commonly use in public places, such as stores, banks, and libraries.
People use touch screens in grocery stores when using the self-checkout. Also used are bar code readers to scan the goods being purchased and Radio frequency identification readers use radio waves to communicate with RFID tags. THey are used to identify cars at toll booths, library books at checkout counters, and are in the antitheft cards attached to clothes in department stores.
3- Many people find that the mouse is impractical for use as a pointing device on a laptop computer. Describe at least three alternatives that are more appropriate.
Three alternatives to a mouse on a laptop are touchpads, pointing sticks and trackballs. Touchpad is a small flat panel sensitive to light pressure. To use it, the user moves their finger across this pad. Pointing stick is a small handle in the centoer of the keyboard that responds to finger presser by moving pointer in the direction it is pushed. The trackball is like an upside-down mouse. It is stationary while user moves a large ball to control cursor on screen.
Monday, December 21, 2009
Criterion G & H: ITGS Project
Criterion G:
As Muslim females, we should dress modestly. However, it is very hard to find clothes that are both modest and stylish. Enter Nawal Hassouneh, a designer of fashionable modest clothing. Nawal designs clothes that fit the Islamic requirements for modest clothing, yet are appealing to those who wish to dress in fashion. These clothes, however, are only available to those who closely know Nawal, and know that she designs clothes. These designs are not available to the global female Muslim community. If her designs are published somewhere, they will be more accessible to people.
Criterion H:
Two possible IT solutions to this problem are a website or a brochure of her designs. The advantages of a website are that the website can be easily updated, it will be accessible to a global population, clear pictures with different views of the designs can be shown, the cost for making a website would be minimal. Some disadvantages include the fact that only people with computers and internet access will be able to view the site. Also, it might become troublesome to keep up with updating the website, and it may become outdated. Advantages of making a brochure are that it is easy to read, the pictures are clear, it can be read anywhere and distributed to local business willing to advertise. A disadvantage is that it would not reach as big a community as possible. Also, the printing costs for the brochures, especially if given away for free, could be quite expensive. Once the brochure is made, it is harder to update it or correct any mistakes. As a result, I have chosen to produce a website to display the designs. It can reach a larger amount of people, and is less expensive to produce.
As Muslim females, we should dress modestly. However, it is very hard to find clothes that are both modest and stylish. Enter Nawal Hassouneh, a designer of fashionable modest clothing. Nawal designs clothes that fit the Islamic requirements for modest clothing, yet are appealing to those who wish to dress in fashion. These clothes, however, are only available to those who closely know Nawal, and know that she designs clothes. These designs are not available to the global female Muslim community. If her designs are published somewhere, they will be more accessible to people.
Criterion H:
Two possible IT solutions to this problem are a website or a brochure of her designs. The advantages of a website are that the website can be easily updated, it will be accessible to a global population, clear pictures with different views of the designs can be shown, the cost for making a website would be minimal. Some disadvantages include the fact that only people with computers and internet access will be able to view the site. Also, it might become troublesome to keep up with updating the website, and it may become outdated. Advantages of making a brochure are that it is easy to read, the pictures are clear, it can be read anywhere and distributed to local business willing to advertise. A disadvantage is that it would not reach as big a community as possible. Also, the printing costs for the brochures, especially if given away for free, could be quite expensive. Once the brochure is made, it is harder to update it or correct any mistakes. As a result, I have chosen to produce a website to display the designs. It can reach a larger amount of people, and is less expensive to produce.
Sunday, December 13, 2009
CrossCurrents: Get Ready for the Real Bionic Man
1- Yes, there is a difference, but not an especially significant one. Both help with vision or with walking. The difference is that they are more technologically advanced than glasses or an artificial hip.
2-Benefits include making life easier for those who have disabilites. A risk is that these devices malfunction and harm the person using them, or stop working at a critical time. Also, we may come to rely on them too much, and not be able to function with out them.
3- Yes, I think the development of advanced bionic devices is inevitable, and no doubt, decades or millineums from now, they will be as mainstream as laptops and cell phones are today.
2-Benefits include making life easier for those who have disabilites. A risk is that these devices malfunction and harm the person using them, or stop working at a critical time. Also, we may come to rely on them too much, and not be able to function with out them.
3- Yes, I think the development of advanced bionic devices is inevitable, and no doubt, decades or millineums from now, they will be as mainstream as laptops and cell phones are today.
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