CHAPTER 5. Assignment from Mr. Tri Djoko Wardjono.

True/False

1. True
2. True
3. False
4. True
5. True
6. False
7. False
8. False
9. False
10. True
11. True
12. True

Multiple Choice

1. C
2. A
3. B
4. C
5. D
6. C
7. C
8. C

Matching

1. B
2. G
3. D
4. J
5. E
6. A
7. F
8. H
9. I
10. C

Short Answer

1. What are three different types of mouse devices?The three different types of mouse devices are optical mouse, air mouse, and wireless mouse.What makes them different from each other?Most desktop computer users today have some type of optical mouse, which uses devices that emit and sense light to detect the mouse’s movement. Some use optical sensors, and others use a laser. The latter, often referred to as a laser mouse, usually is more expensive than the former. You can place an optical mouse on nearly all types of flat surfaces. Some newer models combine both optical sensors and laser, enabling users to place the mouse on rougher surfaces such as carpeting and park benches. Further, some mouse devices are more sensitive than others for users requiring more precision such as graphic artists, engineers, or game players.The mobile user who makes presentations may prefer a mouse that has additional buttons for running a slide show and controlling media, similar to a remote control. A newer type of mouse, called an air mouse, is a motion-sensing mouse that, in addition to the typical buttons, allows you to control objects, media players, and slide shows by moving the mouse in predetermined directions through the air. For example, raising the mouse up might increase the volume on your media player. A mouse connects to a computer in several ways. Many types connect with a cable that attaches to a USB port or a mouse port on the system unit. A wireless mouse, or cordless mouse, is a battery-powered device that transmits data using wireless technology, such as radio waves (Bluetooth) or infrared light waves (IrDA). Some users prefer a wireless mouse because it frees up desk space and eliminates the clutter of a cord.
2. Name at least five mouse operations.Some of the mouse operations are Point, Click, Right-click, Double-click, and Drag.Describe and give examples of each of the mouse operations that you chose.

   Operation	Mouse Action	Example
   Point	Move the mouse until the pointer on the desktop is positioned on the item of choice.	Position the pointer on the screen.
   Click	Press and release the primary mouse button, which usually is the left mouse button.	Select or deselect items on the screen or start a program or program feature.
   Right-click	Press and release the secondary mouse button, which usually is the right mouse button.	Display a shortcut menu.
   Double-click	Quickly press and release the left mouse button twice without moving the mouse.	Start a program or program feature.
   Drag	Point to an item, hold down the left mouse button, move the item to the desired location on the screen, and then release the left mouse button.	Move an object from one location to another or draw pictures.

3. What is OCR (optical character recognition)?Optical character recognition (OCR) is a technology that involves reading typewritten, computer printed, or hand-printed characters from ordinary documents and translating the images into a form that the computer can process. Most OCR devices include a small optical scanner for reading characters and sophisticated software to analyze what is read.What is OMR (optical mark recognition)?Optical mark recognition (OMR) is a technology that reads hand-drawn marks such as small circles or rectangles. A person places these marks on a form, such as a test, survey, or questionnaire answer sheet. With a test, the OMR device first scans the answer key sheet to record correct answers based on patterns of light. The OMR device then scans the remaining documents and matches their patterns of light against the answer key sheet.
4.  What is the most widely used biometric device today?The most widely used biometric device today is a fingerprint reader.Describe how the device works.A fingerprint reader, or scanner, captures curves and indentations of a fingerprint. The reader can be set up to perform different functions for different fingers; for example, one finger starts a program and another finger shuts down the computer. With the cost of fingerprint readers often less than $100, home and small business users in stall fingerprint readers to authenticate users before they can access a personal computer. External fingerprint readers usually plug into a USB port. To save on desk space, some newer keyboards and notebook computers have a fingerprint reader attached to them, which allows users to log on to programs and Web sites via their fingerprint instead of entering a user name and password.
5. What is the Americans with Disabilities Act (ADA)?The Americans with Disabilities Act (ADA) requires any company with 15 or more employees to make reasonable attempts to accommodate the needs of physically challenged workers.How might gesture recognition and computerized implant devices help physically challenged users in the future?With gesture recognition, the computer will detect human motions. Computers with gesture recognition capability have the potential to recognize sign language, read lips, track facial movements, or follow eye gazes. For paralyzed or speech impaired individuals, a doctor will implant a computerized device into the brain. This device will contain a transmitter. As the user thinks thoughts, the transmitter will send signals to the computer.