ORGANISING
organising is the process of arranging, reporeseting and formating data for use of other information systems.
data must be organised in such a way that benefits users
organising text and audio data for disabilities
organising image data which expands the image.
Some people can view the website without a style sheet so they can view without the colours.
used for colour blindness, blind and also used for people who are blind altogether
Benefits
Allow susers to stay informed by retrieving the current information fromt heir chosen sites.
saves time not going to every website each time.
STORING AND RETRIEVING
is a 2 step process that refers to moving datra to and from storage devices.
and impornat point is that data stored must be absolutely identical to the data retrieved otherwise the information is considered unreliable.
security of stored data - cloud computing
infomration must be stored securelt to prevent loss or misuse. dependant on whether or not it is designed to protect against both accidental and malicious attempts to aboid security policies. data can also be lost or drestroed by the administrator.
unauthorised retrieval of data
ipp 5-7 concerning access and amendment refers to afencies being require to record the types of information that they hold and who theyu give it to.
admin can have rightes to data and its storace and acess. a hacker could exploit the data via phishing and fraud may choose to read or steal the data to eavesdrop on activities, view transactions or manipluate data for /financial data.
advances and uses
data is stored online and can be easily acessed online. can eliminate the ened for USBs and other forms of portable storage devices.
ID Cards.
confirmation of who you are you can make copies of them.
Monday, March 29, 2010
Sunday, March 28, 2010
Impact of Information
- Processing
- Processing is when data is updated, altered in any way shape, or form to give it meaning. (change the original data)
- the ownership of processed data is a debatable topic as it can be the obligation of software developers or the responsibility of the individual processing the data.
- examples include; photo shopping, spell checks, currency converters, thesaurus (Microsoft word does the work for you, so they become reliant on this technology, although it still educates you)
- Who takes the liability if they processed information is wrong? for example, on Microsoft Word, if you type in gaol and it comes up with jail which is American.
- Bias in process, for example My School Website. You can view the level of education, although not the extra curriculum activities.
- Displaying
- the process by which output from an information system is produced in hard or soft copy according to the needs of the user.
- it depends on the purpose of the information system and the type of data that the system stores.
- OLED - organic led lighting
- 3D glasses - from any screen.
used to display data: printers, plotters ect.
surface computing: untrained workers - easy to use therefore its able for anyone to use.
Displaying data requires some measure of responsibility from those who create the display, whether an electronic display or one using traditional methods.
Several options to enhance display for visually impared. e.g. zoooooom.
e.g.2. screen reader sortware reads aloud writing on the screen for visually impared.
- Processing is when data is updated, altered in any way shape, or form to give it meaning. (change the original data)
- the ownership of processed data is a debatable topic as it can be the obligation of software developers or the responsibility of the individual processing the data.
- examples include; photo shopping, spell checks, currency converters, thesaurus (Microsoft word does the work for you, so they become reliant on this technology, although it still educates you)
- Who takes the liability if they processed information is wrong? for example, on Microsoft Word, if you type in gaol and it comes up with jail which is American.
- Bias in process, for example My School Website. You can view the level of education, although not the extra curriculum activities.
- Displaying
- the process by which output from an information system is produced in hard or soft copy according to the needs of the user.
- it depends on the purpose of the information system and the type of data that the system stores.
- OLED - organic led lighting
- 3D glasses - from any screen.
used to display data: printers, plotters ect.
surface computing: untrained workers - easy to use therefore its able for anyone to use.
Displaying data requires some measure of responsibility from those who create the display, whether an electronic display or one using traditional methods.
Several options to enhance display for visually impared. e.g. zoooooom.
e.g.2. screen reader sortware reads aloud writing on the screen for visually impared.
Sunday, March 14, 2010
http://www.privacy.gov.au/law/act
The above site is a resource for Australian laws governing the collection and use of data and information. Visit the site then make brief notes on;
1. The name of the act or law that governs the collection and use of data in
2. The Information Privacy Principles (see IPP plain English summary). link below!
People Centred Systems: systems that are designed so that the system fits the users' needs.
A systems analyst is involved in the design of an information system. Cheifly what their role is they are the go between person between the technical designers and the users / participants of the system. Example: A band wants a web designed. You would have a web designer, the band and a system analyst in between them who discusses the flow of ease and purpose of use. they ask why.
Page 309 Questions:
Name 6 ethical issues a systems analyst should consider:
safety, security, privacy, theft/plagiarism, reliability of data, equity, copyright.
Name 4 social issues a systems analyst should consider:
ergonomics, work practices, changing nature of work, relationships between participants, psychological factors, design, increased ease of communication and access to knowledge.
State the characteristics of people-centred systems:
focus is on the problem, not the tool. easily understood, provide templates and assistants, work reliably, user-friendly, safe, look appealing, efficient.
In what ways are people like machines and in what ways are they different:
Machines can do repetitive tasks well and quickly, humans can't. Computers are single minded and humans are innovative. We can think of solutions and computers cant, they only do what they are told.
List the major advances in the desktop computer since the earliest time:
Tuesday, February 23, 2010
UNIT 8
Today we went over the diagrams from last lessons. We looked at a few peoples diagrams on their blog. We then looked at Serial and Parallel data transmission. the difference is: Serial - sending one row of bits in a line, individually. Example: USB. Internet. Parallel - sending 8 rows of bits in a line, all together. Example: Computer to Printer. Parallel is faster, but it gets problems and is out of sync.
Signal Directions:
Examples are: Simplex (type of communication that runs one way e.g. Radio), Half Duplex (type of communication that can run one way AT A TIME. for example, Walkie Talkie, as you cannot give a message while getting a message), Full Duplex (type of communication that runs both ways at the same time for example web-cam on msn, you can view both cameras communicating at the same time.
A) Simplex.
B) Half Duplex.
C) Full Duplex.
Synchronous Communication: Communication that is synchronized. Such as knowing that someone is about to send data and about to receive it. Example: Video call.
Asynchronous Communication: Has no set time for the data to be sent or received (page 186). Meaning the data will be sent at any time. for example; Sms, email.
Bandwidth: amount of data moving through a communication channel at the given time.
Broadband: has a high bandwidth.
Baud: is the number of distinct signal events or timing intervals in a second.
Signal Directions:
Examples are: Simplex (type of communication that runs one way e.g. Radio), Half Duplex (type of communication that can run one way AT A TIME. for example, Walkie Talkie, as you cannot give a message while getting a message), Full Duplex (type of communication that runs both ways at the same time for example web-cam on msn, you can view both cameras communicating at the same time.
A) Simplex.
B) Half Duplex.
C) Full Duplex.
Synchronous Communication: Communication that is synchronized. Such as knowing that someone is about to send data and about to receive it. Example: Video call.
Asynchronous Communication: Has no set time for the data to be sent or received (page 186). Meaning the data will be sent at any time. for example; Sms, email.
Bandwidth: amount of data moving through a communication channel at the given time.
Broadband: has a high bandwidth.
Baud: is the number of distinct signal events or timing intervals in a second.
Monday, February 22, 2010
T 1 - L e s s o n S e v e n - 2 3 . 0 2 . 1 0
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Today we made the following diagram. We made one individually and this one was with the class:
I think my diagram was fairly close to this, but i was confused with what the arrows required with description.
Towards the end, when sir went through it, i understood.
We then looked at context diagrams although the bell stopped us before anything efficient was done. What i caught on to though was that it is a process for ONE system. I will write more for next lesson :)
Image uploaded from last lesson. Source: Melanie's Blog:Edit http://doublebackwards.blogspot.com/
Today we made the following diagram. We made one individually and this one was with the class:
I think my diagram was fairly close to this, but i was confused with what the arrows required with description.
Towards the end, when sir went through it, i understood.
We then looked at context diagrams although the bell stopped us before anything efficient was done. What i caught on to though was that it is a process for ONE system. I will write more for next lesson :)
Image uploaded from last lesson. Source: Melanie's Blog:Edit http://doublebackwards.blogspot.com/
Mastery Test (Homework)
A system is: (c) A collection of parts that work together.
An information system: (a) turns data into information.
A person who contributes data to an information system but is not involved in its operation and does not use any information or data it produces can be described as : (c) in the system environment.
The environment of an information system: ()
Which of the following lists contains all the categories that would be needed to adequately describe the role an information system: (c)
The participants in an information system: (a) are responsible for its operations.
A system is a collection of parts that work together to achieve a particular purpose or result.
All systems have inputs, processes and outputs.
An information system accepts data as an input and produces information or processed data as an output.
Every system has a purpose that describes why it is needed and a(n) environment where it is used.
Information technology is the equipment (hardware) used by an information system and the instructions (software) that controls the equipment.
A participant is anyone who is involved in the operation or running of an information system.
An end user is the person who receives the information produced by an information system.
The environment is where an information system is used.
A group information system is used by many different participants.
23 - Explain how new developments in technology have influenced information system.
Netbook - provides mobility and compact ability.
iPhone - provides on-the-go music download ect.
Social and Ethical Issues :
Privacy and Security - Privacy is information you have on a system, and security is how you keep that information safe and private.
Access and Control - those who have access to technology have more control over their life including online banking and educational reasons.
Employment and the changing nature of work - Modern day work is working from home (aka telecommuting), this causes isolation and distraction.
Data Flow Diagrams:
< equiv="Content-Type" content="text/html; charset=utf-8">< name="ProgId" content="Word.Document">< name="Generator" content="Microsoft Word 11">< name="Originator" content="Microsoft Word 11">< rel="File-List" href="file:///C:%5CDOCUME%7E1%5C06rshaw%5CLOCALS%7E1%5CTemp%5Cmsohtml1%5C01%5Cclip_filelist.xml">Data flow diagrams represent an information system as a number of processes that together form the single system. This single system can be represented more simply using a context diagram (see below). Data flow diagrams therefore show a further level of detail not seen in the context diagram. Data flow diagrams identify the source of data, its flow between processes and its destination along with data generated by the system.
Entity: thing or person that is the source of a data.
Data Flow and Context Diagrams - On the student website.
A system is: (c) A collection of parts that work together.
An information system: (a) turns data into information.
A person who contributes data to an information system but is not involved in its operation and does not use any information or data it produces can be described as : (c) in the system environment.
The environment of an information system: ()
Which of the following lists contains all the categories that would be needed to adequately describe the role an information system: (c)
The participants in an information system: (a) are responsible for its operations.
A system is a collection of parts that work together to achieve a particular purpose or result.
All systems have inputs, processes and outputs.
An information system accepts data as an input and produces information or processed data as an output.
Every system has a purpose that describes why it is needed and a(n) environment where it is used.
Information technology is the equipment (hardware) used by an information system and the instructions (software) that controls the equipment.
A participant is anyone who is involved in the operation or running of an information system.
An end user is the person who receives the information produced by an information system.
The environment is where an information system is used.
A group information system is used by many different participants.
23 - Explain how new developments in technology have influenced information system.
Netbook - provides mobility and compact ability.
iPhone - provides on-the-go music download ect.
Social and Ethical Issues :
Privacy and Security - Privacy is information you have on a system, and security is how you keep that information safe and private.
Access and Control - those who have access to technology have more control over their life including online banking and educational reasons.
Employment and the changing nature of work - Modern day work is working from home (aka telecommuting), this causes isolation and distraction.
Data Flow Diagrams:
< equiv="Content-Type" content="text/html; charset=utf-8">< name="ProgId" content="Word.Document">< name="Generator" content="Microsoft Word 11">< name="Originator" content="Microsoft Word 11">< rel="File-List" href="file:///C:%5CDOCUME%7E1%5C06rshaw%5CLOCALS%7E1%5CTemp%5Cmsohtml1%5C01%5Cclip_filelist.xml">Data flow diagrams represent an information system as a number of processes that together form the single system. This single system can be represented more simply using a context diagram (see below). Data flow diagrams therefore show a further level of detail not seen in the context diagram. Data flow diagrams identify the source of data, its flow between processes and its destination along with data generated by the system.
Entity: thing or person that is the source of a data.
Data Flow and Context Diagrams - On the student website.
Sunday, February 14, 2010
Data Information
TEXT ASCII - American standard code for information interchange. 7 digits per letter. ♥ - alt 3 ☺ - alt 1 ☻ - alt 2
DATA
Means groups of information that represent the quality or quantitative attributes of a variable. Data is typically the results of measure meets and can be the basis oaf diagrams images or observation of a set of images.
A bit - is the basic unit of information in computer and telecommunications.
Byte is a unit of digital information in computing and telecommunications.
1024 Bytes - 1KB (kilobyte)
1024 Kilobytes - 1MB (megabytes)
1024 Megabytes - 1GB (gigabytes)
A BIT IS A PART OF A BYTE (i took a little bit from my bite)
Data compression -
Also called source coding is the process of encoding information using few than an unencoded representation would use. e.g. Zipping files.
Helps save space on hard drives. Downside - compressed data must be decompressed before anything can be done to it.
AUDIO DATA
Sampling rate - the number of samples per second measured during the recording process + to digitize a certain so
und. Measured in Hertz. Common sampling rate for stereo audio is 44,100 per second.The higher your sampling rates, the better your results.
Sample Size - The size of the audio being streamed e.g. Imb.
Digitizing - conversion of analog signals which are continuous electri
cal signals to digital signals which are non continuous to converting it to a stream of numbers to get audio onto a computer. Nearly all recorded music has been digitized.
Bit Rate - amount of information that is transferred per second (bits per second)
The higher bits taken per second the smoother the sound.
(Bit rate image)
Video Data
Refers to electronically capturing, recording, precessing storing, transmitting and displaying a sequence of still images that recorded many times a second to produce scenes in motion.
It is in a format that can be presented on television (or on any video supporting device for that matter)
A video mainly consists of:
- Still images (image frames)
- Audio
Sample rate is the number of measurements taken every second.
in terms of video + audio, the more accurate "digitized" sound or video, the higher the sampling rate and thereby more data measurements to be collected.
Measured by frequency (Hz).
Sample size refers to the capacity of a video data.
It is representation of units to be sampled that holds the statistical information of video data.
Frame rate - the rate at which an imaging device produces unique consecutive images called frames.
In short, frame rate are the number of frames which are shown in a second.
Video data consists of the amin componsesnts of framwork - images being recoreded into still frames and the recording of audio through a microphone in the camer. Video data is a representation of images that move or change. This also includes the various forms of animation.
Procedure to make a video!
COLOUR DEPTH!
DATA
Means groups of information that represent the quality or quantitative attributes of a variable. Data is typically the results of measure meets and can be the basis oaf diagrams images or observation of a set of images.
A bit - is the basic unit of information in computer and telecommunications.
Byte is a unit of digital information in computing and telecommunications.
1024 Bytes - 1KB (kilobyte)
1024 Kilobytes - 1MB (megabytes)
1024 Megabytes - 1GB (gigabytes)
A BIT IS A PART OF A BYTE (i took a little bit from my bite)
Data compression -
Also called source coding is the process of encoding information using few than an unencoded representation would use. e.g. Zipping files.
Helps save space on hard drives. Downside - compressed data must be decompressed before anything can be done to it.
AUDIO DATA
Sampling rate - the number of samples per second measured during the recording process + to digitize a certain so
und. Measured in Hertz. Common sampling rate for stereo audio is 44,100 per second.The higher your sampling rates, the better your results.Sample Size - The size of the audio being streamed e.g. Imb.
Digitizing - conversion of analog signals which are continuous electri
cal signals to digital signals which are non continuous to converting it to a stream of numbers to get audio onto a computer. Nearly all recorded music has been digitized.Bit Rate - amount of information that is transferred per second (bits per second)
The higher bits taken per second the smoother the sound.
(Bit rate image)
Video Data
Refers to electronically capturing, recording, precessing storing, transmitting and displaying a sequence of still images that recorded many times a second to produce scenes in motion.
It is in a format that can be presented on television (or on any video supporting device for that matter)
A video mainly consists of:
- Still images (image frames)
- Audio
Sample rate is the number of measurements taken every second.
in terms of video + audio, the more accurate "digitized" sound or video, the higher the sampling rate and thereby more data measurements to be collected.
Measured by frequency (Hz).
Sample size refers to the capacity of a video data.
It is representation of units to be sampled that holds the statistical information of video data.
Frame rate - the rate at which an imaging device produces unique consecutive images called frames.
In short, frame rate are the number of frames which are shown in a second.
- i stands for interlaced fields, so 50i = 25 frames. (does half a television refresh each turn)
- p stands for non interlaced fields so 52p = 50 frames. (does whole television each time, in half the time)
Video data consists of the amin componsesnts of framwork - images being recoreded into still frames and the recording of audio through a microphone in the camer. Video data is a representation of images that move or change. This also includes the various forms of animation.
Procedure to make a video!
- Hardware
- Scenery / still images
- Audio
- Edit audio
- Pixels
- Brightness/colours
- Editing video
- Final check
- Upload.
COLOUR DEPTH!
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