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Contents

  1. 1 Page 221
    1. 1.1 Q1. Name four dynamic display devices.
    2. 1.2 Q2. Name three static display devices.
    3. 1.3 Q3. What is DVI and what does it do?
    4. 1.4 Q4. Why do colour display devices require cells or display units organised in groups of three?
    5. 1.5 Q5. Why is a plotter generally not considered to be a printing device?
    6. 1.6 Q6. How could a static display be more useful than a dynamic display?
    7. 1.7 Q7. Summarise the effect paper quality has on the quality of inkjet printing.
  2. 2 Page 230
    1. 2.1 Q1. What is a display user interface?
    2. 2.2 Q2. What is a mail merge?
    3. 2.3 Q3. What is a dynamic link?
    4. 2.4 Q4. What are the advantages and disadvantages of charts as a method of displaying information?
    5. 2.5 Q5. Is the Web an example of presentation technology? Explain.
    6. 2.6 Q6. How could information technology be used to present information graphically without the use of presentation software?
  3. 3 Page 234
    1. 3.1 Q1. What is a storyboard?
    2. 3.2 Q2. What is assistive technology?
    3. 3.3 Q3. How have computer-based systems changed the way animations are created?
    4. 3.4 Q4. Why are standards for the display of information important?
    5. 3.5 Q5. Give an example of a display medium that is older than recorderd history.
    6. 3.6 Q6.In what ways is computer-based animation the same as traditionally drawn animation.
    7. 3.7 Q7. Outline some of the problems that visually impaired web users could have when visiting a web site.
    8. 3.8 Q8. Report on the display standards for young children.
  4. 4 Page 235
  5. 5 Page 236
    1. 5.1 Questions 11-21
    2. 5.2 22. Evaluate the claim that users see display as the most important of the seven information processes.
    3. 5.3 23. Outline how static and dynamic displays could be used to collect data.
    4. 5.4 24. Evaluate the current range of VDU devices on their suitability for home computer systems.
    5. 5.5 25. Discuss the effects that the computer technology have had on the participants involved in creating information displays.
    6. 5.6 26. Explain how the level of experience of a page designer can affect the display of information.


Page 221

Q1. Name four dynamic display devices.

Cathode Ray Tube (CRT), Liquid Crystal Display (LCD), Plasma and Organic Light Emitting Diode (OLED) are four dynamic display devices.

Q2. Name three static display devices.

Inkjet Printers, Laser Printers and Plotters are three static display devices.

Q3. What is DVI and what does it do?

DVI is Digital Video Interface. It sends digital video signals to a video display device instead of anologue signals which suffer more interference.

Q4. Why do colour display devices require cells or display units organised in groups of three?

In order for display devices to show colour it is necessary for display units to be composed of a constant number of different colours. By using the three colours-red, blue and green-a wide amount of colours in the spectrum can be shown.

Q5. Why is a plotter generally not considered to be a printing device?

Printers are mainly used for printing text and it can be done by just sending the file to the printer. A pen plotter requires more sprecific instructions such as 'lift the pen' or 'place the pen on paper'. It is far more intelligent than a printer, as it 'plots' instead of 'printing'. It is required to place the information in the correct places and create the drawing.
 

Q6. How could a static display be more useful than a dynamic display?

Static displays are permanent as they are 'hard copies'. This proves helpful when one doesn't want any of their information of data altered by outside sources. The final copy of an assignment would usually be a hard copy, as it is easier for the teacher to mark and for constructive criticism to occur without modification of the original data. A dynamic display is also known as a 'soft copy' and allows the reader to alter the data or information available on the file. This is better when further editing is involved.
 

Q7. Summarise the effect paper quality has on the quality of inkjet printing.

When photocopy paper is used in inkjet printing, the ink is absorbed into the paper, creating a slightly unclear look to the character. This happens because inkjet printing relies on the ink drop staying on the paper surface. The best quality paper allows no absorption of ink, giving an image almost identical to the one on the VDU.
 
The ordinary paper used for inkject printing has a rough texture and an uneven surface, causing light to be reflected in awkward directions. Glossy paper allows light to be reflected straight back to the viewer, providing a very bright and clear image. The paper quality is such that it also reduces ink absorption.
 

Page 230

Q1. What is a display user interface?

A display user interface is a software that allows you to interact with the piece of hardware that you would like set up and instruct it what to do. ie set up the way that you want your graphics card to display things on your screen or how your printer should print the document.

Q2. What is a mail merge?

A mail merge combines data from a database with a form letter from a word processor to create multiple copies of a document, but each containing customised information.

Q3. What is a dynamic link?

A dynamic data link stores the name of the source document in the destination document and the location and format of the shared data. The data are not copied between the documents until the destination document is loaded into the computer.

Q4. What are the advantages and disadvantages of charts as a method of displaying information?

Charts can be very useful as display tools. Their main advantage is that a single chart can replace a large and possibly confusing table of numerical data, presenting it in a way that allows the end user to easily view and understand relationships, trends, and comparisons at a glance. However, a significant disadvantage of charts is that it can be difficult and time-consuming to select the display format which is the most effective for showing specific relationships, trends, and comparisons.

Q5. Is the Web an example of presentation technology? Explain.

Yes, the Web is an example of presentation technology. Webpages within a website can contain a multitude of design and presentation elements, ranging from text to graphics (including charts) to audio to video - these are the same main elements used in any presentation, whether computer-based (e.g. a PowerPoint presentation) or not. The Internet, similarly to computer-based presentation software applications, can provide all the technology required by a presenter within an interactive environment to present their message in a way that is clear, interesting, and above all informative. However, inexperienced designers using the Web as a presentation medium are also vulnerable to making the same design mistakes that can occur within other presentation technologies, losing the original message. The Web also has the advantage of being able to use hyperlinks to link between different data and information within a presentation. Finally, presentations created with other technology and software can often be shared between computers over the Internet.

Q6. How could information technology be used to present information graphically without the use of presentation software?

Presentation software applications were developed to speed up the preparation of data for presentations, but unfortunately they can also have the opposite effect if not used correctly. As an alternative to presentation software, a wide range of information technology can be used to graphically present data. Word processing applications, along with spreadsheet software, allow for the creation of effective presentation media (including graphics and charts) utilising many different design elements - the end product can also be printed out (another example of information technology) and presented on paper. Other information technology such as the Internet can also be used to create and transfer multimedia-rich presentations, possibly incorporating additional elements such as audio and video.
 
Q7. Outline some of the problems that visually impaired web users could have when visiting a site?
Visually impaired web users have many problems visiting websites. These include difficulty reading text on screen (solved by braille readers or screen readers), difficulty seeing small images (solved by screen magnifiers), distinguishiong colours and viewing images.
 
Q8. Report on the display standards for young children.
 
Display for young children must be  very simple and easy to navigate around. There must be easy to understand words and material, swear words or inappropriate material are not allowed in standardised display.
 

Page 234

 

Q1. What is a storyboard?

 
A storyboard is a visual plan (usually on paper) of a video, movie or animation project. It shows the story as a sequence of scenes. It is used to assist animators, designers and others to plan their work. They are also used in plannnig and designing computer multimedia.
 

Q2. What is assistive technology?

Assistive technology is a combination of software and hardware that allows disabled people to use computer display services. This includes devices such as braille readers, screen magnifiers, and screen readers.
 

Q3. How have computer-based systems changed the way animations are created?

 
They can automatically perform tasks such as tweening and colour fill operations. This allows the animator to reduce the amount of work necessary to animate the animation.
 

Q4. Why are standards for the display of information important?

Standards for the display of information are important because they make sure that everyone can access the information without any problems.  Users with disabilities such as colour blindness for example, would not be able to use a colour-coded website.
 

Q5. Give an example of a display medium that is older than recorderd history.

An example of display that has been used before recorded history is images.
 

Q6.In what ways is computer-based animation the same as traditionally drawn animation.

Computer-based animation is still quite similar as traditional animation as it uses a storyboard to be the plan.  Each scene is then individually drawn as black line drawings.  Traditionally, these images would then have ‘tweening’ and ‘fill’ done manually by different people.  But now with computer-based animation, the computer does the ‘tweening’ and ‘fill’ operations automatically, with little need of human intervention.
 

Q7. Outline some of the problems that visually impaired web users could have when visiting a web site.

Visually impaired users may encounter the following problems when visiting a website:

·         Braille readers can only translate text so images and video would not be able to be accessed.

·         Screen magnifiers may lower graphics quality so users would still suffer the same visual impairment.

·         Screen readers may not be able to read certain texts and visual effects and images wouldn’t be available.

·         Websites with too many graphics and many images wouldn’t be available to people with slow connections to the internet and so they would become “visually impaired”.

Q8. Report on the display standards for young children.

Young children’s eyes are still developing and so screen resolution should be as large as possible to prevent sight damage. 640x480 pixels which is commonly available on normal computers is a suitable resolution for young children. However, accessing the internet may be a problem because websites are generally not designed for smaller children as they are cluttered with text and images which would be of no sense to the child. Nowadays computers specifically for younger children are being created.  Though, overall displays are not designed for young children unless specifically built.

Page 235

1. Presenting information to users is:
(c) the displaying process


2. The resolution of audio data could be described by:
(c) the number of sound samples taken every second


3. An advantage of a CRT display is:
(a) its brightness

4. Assistive technology is used to:
(d) allow more people to access information displays

5. A static display:
(c) creates a permanent output


6. Typeface is:
(d) a design for a set of text characters

7. The quality of the information displayed will depend on:
(d) all of the above (i.e. resolution of display hardware, accuracy of data, experience of presentation designer)

8. White space in a printed document:
(b) can reduce crowding of the text

9. An advantage of a digital data display system over an analogue one is:
(b) less signal interference

10. A dynamic data link:
(a) requires a dynamic data display



Page 236

Questions 11-21

11. Displaying presents the output from an information system to users.

12. The quality of a display is measured by its resolution .

13. A distinctive design for a set of characters is known as a typeface.

14. Output that, once created, cannot be alrered is often called a static display.

15. LCD produce a visual display by passing light through electronically controlled crystals.

16. One way to eliminate the loss of signal qualty caused by interference is to use a DVI.

17. A storyboard is a paper-based plan of a movie, animation or video.

18. Mail merge combines data from two different source documents to create individualised printed documents.

19. A dynamic data link allows data shared between documents to be automatically updated.

20. A font is a complete collection of printable characters, all with a consistent design, size and style.

21. Static Display- Once created cannot be altered - H

Sampling Rate- Measures the resolution of audio data - I

Storyboard- Plan for a visual display presentation - G

Point Size- Measures the height of a font - E

Displaying- Presenting information for a purpose - D

Object Link- Allows shared data to be updated in the destination document - C

dpi- Measures the resolution of a printed page - B

Dynamic Display- Can be updated by applications and user interactions - J

CRT- Uses a glass tube and beams of electrons - F

DVI- Eliminates most of the interference in a video display - A



22. Evaluate the claim that users see display as the most important of the seven information processes.

End users are very likely to see displaying as the most important of the seven information processes. This is because the role of the end user involves only the output of the system - the end user is not concerned with how the system functions - and displaying is the process that presents to output from an information system to users.
 
 

23. Outline how static and dynamic displays could be used to collect data.

Both means of displaying data allow a user to access information or data that is somehow useful to them, static display is a method which does not allow the alteration of its data, being a seperate mean from the computer system and being on sources that normally do not rely on electricity and the computer, such as a piece of paper. On the other hand, dynamic displays are thoroughly dependent on the computer and its applications, being able to be changed and processed whenever required. The convenience of both methods to collect data depends on you requirements and available sources, printed documents and books provide reliable information that is not likely to be easily destroyed and become biased yet dynamic displays are quicker to acquire and update to the present for more accuracy.
 
 

24. Evaluate the current range of VDU devices on their suitability for home computer systems.

As the devices have been developing, an expected trend seems to continue – these devices are becoming more compact and efficient.

 

The CRT (cathode ray tube) is the oldest VDU, and its clarity is demoted with a noticeable and annoying ‘flicker’ produced by the ‘scan line’ refresh technology. The user of the home computer would be constantly irritated as well as being troubled by its very nature being bulky and heavy. However, the user would be benefited in the way that it is cheap, bright, clear and viewable from a wide range of angles.

 

An LCD (liquid crystal display) may have been invented for the sole purpose of opposing the CRT. It is thin, light and uses far less power. Another mentionable advantage is that it produces less electromagnetic radiation. However, unlike CRT, it limits the angles that it could be viewed from, and also the displays are not as bright. For a user sitting right in front of the PC, LCD is an option offering higher clarity, disregarding the reduced brightness.

 

Plasma is a method which combines the advantages of both the CRT and the LCD. It is bright, as it produces its own light, and viewable from a wide range of angles. Because plasma displays do not use scan lines, the users will not have to face a constantly flickering screen. There is a faster response time involved, making it better for full-motion videos, and have greater durability, making them less prone to physical damage. Plasma has a significantly higher price which will however drop – production methods will continue to improve.

 

Video projectors can be either LCD or DLP (digital light processor). LCD projectors operate the same way as an LCD screen, except for the fact that it uses a strong light source as a back-light. The image is then focused through a single projector lens. The latter uses light reflection to create the brightest and clearest images out of all of the projection devices. However, it is the most expensive. Video projectors are relatively advanced and higher priced, hence not so suitable for a home computer system.

 
 

25. Discuss the effects that the computer technology have had on the participants involved in creating information displays.

The introduction and improvement of computer technology has had a huge impact on the participants that have been involved in creating information displays. Participants creating information displays have to consider a wide range of issues with the main one being compatibility. Participants have to make information displays so that end users havy easy and quick access with minimal problems. Furthermore, to use computer technology to create information displays includes participants sitting in front of computers for a long time. This could result in various health issues such as repetitive strain injury (RSI), poor eyesight as well as other related issues. This has resulted in the introduction of ergonomical measures to help participants in the process of creating information displays.
 

26. Explain how the level of experience of a page designer can affect the display of information.

Evidently, the more experience a page designer has, the more skills they have mastered. Compared to a designer with a lower level of experience, the designer with more experience will most likely be more competent at various programs, putting together websites, graphics and aesthetics in general. Their higher level of experience may ensure a more professional look to the site, more logical navigation, interesting effects such as animations and a more aesthetically appealing site in general. They will most likely have more knowledge of what works and what doesn’t for the visitors of the site. However, despite the fact a page designer with more experience has more knowledge at hand to utilise, there is a possibility they may overdo a website such as complicated navigation (which although may require a lot of skill to create, may not be simple enough to use with ease) or using too much clashing graphics (no matter how professional they look) making the website unbalanced. Page designers with less experience may be able to easily avoid such complications by keeping a webpage very simple but effective and easy on the eyes which are essential components to user-friendly displaying of information.

 
 
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