m150: data, computing and information 1. 1- introduction: assessments and cut-off-dates 8 credit...
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M150: Data, Computing and information
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1- Introduction: Assessments and cut-off-dates
8 credit course, two semesters 4 TMAs, 2 Quizzes, two finals.Course grade distribution and cut-off-date:
First semester:
TMA01: 08 %, 16 November 2008
TMA02: 10 %, 07 January 2009
Quiz one: 7%, the week of 15 December 2008
Final one: 25 %, during the month of January 2009
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1- Introduction: Assessments and cut-off-dates
Second semester:
TMA03: 10 %, 26 March 2009
TMA04: 7 %, 15 May 2009
Quiz two: 8 %, during the week of 20 April 2009
Final two: 25 %, during the month of June 2009
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1- Introduction: Before you startPower point presentation are not enough to study the
course: you must study the material’s units
TMA late submission will lead to grade deduction
penalties
One week: 25 % of the grade will be deducted
Between one week and two weeks: 50 %
After two weeks : 100%
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1- Introduction: Before you startPlagiarism:
The grade of any common part between two TMAs of different
students will not count on grade summation.
Resources of used documents content should be mentioned clearly
(internet, books, course material …), otherwise, the grade of the
corresponding part will not count.
Attendance:
6 unjustified absences will lead to course drop
Attending other than your tutorials session is not allowed unless you
hold a permission from the coordinator.
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1- Introduction: to succeed the courseLike any other course at AOU, to pass M150 you should:
1- Get at least 40/100 as average grade of TMAs and Quizzes
AND
2- Get at least 40/100 as average grade of final one and final
two
AND
3- Get at least 50/100 as average of both
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2- The course at a glanceThe course has three blocks:
Block one:Unit 1: Data and information
Unit 2: Representation
Unit 3: Crossing the boundary: analogue universe, digital worlds.
Unit 4: Integrating data
Unit 5 : Storing, getting and sending your dataBlock two:
Unit 6: The structure of hardware and software
Unit 7: An introduction to programming using JavaScript
Unit 8: Programs and data ( End of First Semester)
Unit 9: Software development
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2- The course at a glanceBlock Three:
Unit 11: Computing in the wild
Unit 12: Interacting with information
Unit 13: Sensational computing
Unit 14: Hiding data: an introduction to security
Unit 15 : Too many secrets
Unit 16: Realistic expectations
In the first semester we will cover the first 8 units.
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3- Unit One: Data and information
Introduction:Data, information and computers
Paperless, more data
Organizing and structuring data for easy access and use
Example of cards holding data you may need on daily basis:
Driving license
Credit cards
Sports club membership card
Transportation card
Your ID
Etc …
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This course is not about the history of computers (although that will be touched on); it’s about
1. data (such as a person’s name, or the number of a bus route);
2. computers and how they can be made to work with data (e.g. storing it, changing it, and displaying it);
3. information (which is generated by linking items of data to answer questions of interest).
The course is also about how the use of computers can affect you. Whether or not you realise it, you are not only surrounded by computers but you have a persona created by the data associated with you.
Some of the data you create yourself, consciously. Some is created when you open a bank account, enroll on a course, shop using a loyalty card, and so on. How much of this persona of yours is public, whether the data it contains is correct, and whether it should be held in the public domain, are all things you need to be aware of.
What sort of information would a doctor need in the course of his or her working day?
DiscussionHere is a list of the things a doctor needs to know:1. personal information about a patient which enables the doctor to visit that
patient;2. the patient’s medical records which show previous treatments, any adverse
reactions to treatments, and so on;3. information about the external bodies that deal with patients, such as the
location of the nearest pathology laboratory, and the name of the consultants at the local hospital who treat particular disorders;
4. information about the latest policies and procedures of the NHS (National Health Services );
5. recent research findings relevant to a patient’s condition.The above list shows how daunting information requirements can be. Adoctor needs everything from the simple and obvious (the patient’s nameand address) to the complex and possibly obscure (the latest researchfindings on a rare disease).
Imagine wandering around your local supermarket. Mentallyobserve the behavior of other shoppers and the staff at thesupermarket. Write down the information that these two groups need. Shoppers want information about a particular product, where it is,
what it costs and perhaps nutritional information associated with the product.
The store manager wants different information, such as: which items are being sold quickly so that shelves can be
replenished and stock reordered; what the daily turnover of the supermarket is so that new staff
can be hired when business increases. The staff who stack the shelves need to know what products to put
on shelves, and where the products can be found. Staff at the check-outs need to know what some products are (e.g.
different fruits, or how to distinguish pastry items) in order to enter the correct codes.
Data refers to discrete items, such as the price of an item on the shelf of a
supermarket, or the type of product listed on a sign over a supermarket
aisle.
In contrast, information involves linking together two or more items of data to provide
an item of knowledge. If someone suddenly said to you, ‘50p’, you’d be a bit puzzled.
However, being told, ‘The price of a liter of milk is 50p’, would convey information.
In other words, information can be thought of as the answer to a question such as:
‘What is the price of this product?’ So the words ‘50p’ said in connection with nothing
would mean little, but stated in answer to the above question would convey
information or knowledge.
3- Unit One: Data and informationSensing data and turning it into something usable
If you touch a surface, one of the things you will sense is its
temperature
We have developed words like ‘hot’, ‘cold’, ‘warm’, and ‘cool’
Such words allow us to link one sensation (touch) to another (vision)
Since science doesn’t deal with words, scientists have developed more objective
measures of hot and cold, such as the length of a column of mercury in a
thermometer.
Thermometers can then be used to compare temperatures by dividing the column
of mercury into gradations, called degrees Celsius (written °C).
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3- Unit One: Data and informationSensing data and turning it into something usableIf you touch What we perceive with our senses we call the most primitive form of data: perceptual data.Example 3.1, touching a surface
A surface, one of the things you will sense is its temperature
A sign or symbol is a way of representing data.
A sign (or symbol) can be defined as something that conveys some
information by means other than direct representation.
Beeping sound
Arrow traffic
Flags
Legends on maps
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3- Unit One: Data and informationData and information Human beings turn data into information through a process of:
creating signs to represent the data;
agreeing on what the signs symbolize;
linking these signs in a variety of ways to create information;
communicating that information to other people.
Example 3.2
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What has any of this to do with computers? Human beings invented computers because we have a
compelling interest in data. We seek to turn our perceptions of sensations into symbols, and then to store, analyse, process, and turn these symbols into something else: information. Modern computers, with their enormous storage capacity and incredible processing power, are an ideal tool for doing this. They allow us to acquire data, code it in terms of signs, store, retrieve, or combine it with other data. Sophisticated output devices allow us to present the results of all this processing (i.e. information) in ways that were hitherto impossible, too time consuming, or too expensive.
MRI (Magnetic Resonance Image) of human brain, shows different intensities for different parts . The image easily detect a tumor using different color.
3- Unit One: Data and informationComputers as tools for finding
Maps: - the underlying grid of latitude and longitude;
- contour lines showing altitude;
- features such as rivers, roads, buildings and boundaries;
- the names of towns, roads, hills, rivers and other notable features of the landscape.
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3- Unit One: Data and informationGeographical data
Stored in databasesLeave out some layers for a particular purpose
Global positioning system (GPS)NavigationSurveyingPlate tectonic studies
GPS devicesReceiversEmittersToolsBenefits (Examples)
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3- Unit One: Data and informationFinding information: the web
Search engines
Single box waiting the keyword
Serves a similar function to an index in a book
Example: Google, Yahoo, Lycos, …
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3- Unit One: Data and informationFinding information: the web
The process:
1. The keywords are transmitted over the internet to a web server that
contains an index to websites which is associated with a series of
keywords that can be found in the site’s title, address or contents. The
index keywords and the user’s requested keywords are compared by the
server.
2. The web server then retrieves references to those websites that contain
the right keywords and sends details of each reference back to the user’s
browser.
3. The browser then displays the references for the user.
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3- Unit One: Data and informationFinding information: the web
Efficient search: the gateways
Composed keywords
Research refinement
Tracking your search path
Example 4.1
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3- Unit One: Data and informationComputers as tools for working with data
DNA
A DNA strand, bases, nucleotides, genes, and a chromosome (a) A small section of a DNA strand as though it were untwisted. Each box represents a base (A, C, G or T). Each pair of bases forms one nucleotide. Several nucleotides make up a gene (shown by brackets) (b) How the strand of DNA in (a) is twisted into the famous double helix (c) A chromosome formed from one DNA strand
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3- Unit One: Data and informationComputers as tools for working with dataDNA:- It consists of pairs of chemical bases called adenine (A), cystosine (C),guanine (G) and thymine (T).-The bases (which in Figure 5.1 are colour coded) can only be paired according to the rules: A to C and G to T.- A ‘rung’ or pair of bases (e.g. A–C) is called a base pair.- A nucleotide is a base pair plus its attached ‘structural’ molecules (i.e.the sides of the ladder).- Sequences of base pairs constitute genes which are the sections of aDNA strand that form discrete units of heredity (such as eye colour).- A complete DNA strand constitutes a chromosome (a human being has46 of these combined into 23 pairs).- The four letters (A, C, G, and T) representing the DNA bases constitute‘signs’ symbolising the building blocks of DNA. You can think of a set ofsigns as a code.
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3- Unit One: Data and informationComputers as tools for working with data
The human genomeThe human chromosomes.
An X and Y chromosome is shown as the final
pair, meaning that the individual would
be a male (females have two X
chromosomes)
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3- Unit One: Data and informationComputers as tools for working with data
Genetic tests are used for several reasons including:
Prenatal diagnostic test
Alzheimer disease
Identity testing
Etc…
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3- Unit One: Data and informationArt and the computers
Photograph
Painting
Infinite color spectrum
Transforming the natural to the designed
Modifying, customizing and reviewing.
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3- Unit One: Data and informationControlling things
The user interface
Displaying the choices
Displaying indications
Choosing programs and parameters
Ensuring safety
Controlling the machine
Actuators
Sensors
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3- Unit One: Data and informationSelling on the web
Browse through the details of the goods for sale
Search for a particular product
Check the availability of goods
Read and review the comment of other purchasers
Register to receive newsletters
But product using credit or debit cards
See what items are most popular
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3- Unit One: Data and informationDistributed system
The web
The database
The database server
The network
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4- What’s nextUnit 2: Representation
Convention communication and representation
Property of representations
Picking representations
Sharing and formats
Computer based activity: a case study
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A computer system is the combination of: the computer (with its processor and storage); other equipment such as a scanner or printer; the software programs that make it all work.