1 What about Media and Computing? We are NOT We structure media - - PDF document

1 What is "Informatik"?

• Prof. Dr. Debora Weber-Wulff SS 2007
• During your studies you will not just use

computers, but learn how they work and how they are programmed.

• "Informatics" is not just programming, there is

much more involved.

• Informatics is a young discipline – the first

computer was built in 1941

• Informatics is a dynamic discipline
• What do you think Informatics or computing is

all about?

• Informatik is the science of the systematic

processing of information – not just using a computer – especially automatic computation. The automatic computation can involve analogue or digital computers.

• Informatik and Information Technology are the

basis of what is known as data processing.

Difference Informatik / DP?

• Informatik

Methodology, application of methods in different areas. Uses abstraction and modelling, technical realisations of existing computers, knowledge about application domains and applicable laws, is able to produce standard.

• DP

Applications themselves

What do we do in computing?

• Formulate abstractions or models:

structuring

• Implement systems
• Design (standard) solutions

2

What about Media and Computing?

• We structure media
• investigate properties of media
• formalize media
• learn about people and their interactions with

machines

• evaluate usability and design for usability

We are NOT

• Designers
• Film makers
• Journalists
• Application programmers
• Controllers
• .....
• but we know how to talk to people who are!

We

• use abstract symbols, objects and terms
• look at data structures, language structures,

system structures

• investigate possibilities of automatic

transformations

• know how to analyse, describe, and construct

systems in the media world

• are able to combine media

Information + Automatics

• French

"informatique"

• Dutch

"informatika"

• Italian

"informatica"

• Polish

"informatiyka"

• English

"computer science" "informatics"

• Icelandic

"tölvunarfræði"

• German

"Informatik"

• Comp. is the science of structures
• not mathematics
• not natural science
• not engineering
• not the arts
• not a handicraft

But a science of structures that uses methods and tools from all of the above

Computer Science

Core Computing

Theory

• Computation
• Algorithmics
• …

Technical

• Hardware
• Firmware
• Monitors
• Networks
• …

Practical

• Databases
• Compilers
• Operating Systems
• Interfaces
• …

3 Computer Science

Applied Computing

Science

• Physics
• Medicine
• …

Media

• Internet
• Film
• CD / DVD
• Broadcast
• …

Engineering

• Electrical
• Mechanical
• Civil
• Aerospace
• …

Others

• Arts
• Business
• Administration
• Society
• …
• Prof. Dr. Debora Weber-Wulff

What´s inside a computer?

Not exactly…

My First Computer

I / O Storage Memory ALU Hi!

• ther

stuff Program Counter

More like this

CPU

CPU = Central Processing Unit

ALU PC Registers „Brain“

Main memory Secondary memory External devices I O U N I T

ALU = Arithmetic Logical Unit IOU = Input / Output Unit PC = Program Counter

More like this

Ted Nelson´s Model

86045 17328 4815 340 45678 181 1 2 3 4 5 n

Where to next? PC Some cells are program, others are data, but all are just bits, binary digits Main Memory word

Compilers

Source code

• c
• c

Object code … … LINKER .EXE COMPILER

A B C

LOADER

4

Compilers

Animation "Compilers"

Compilers – From Code to Java

.java .class .class .class java … javac compiler fetch by need interpreter …

Compilers

Animation "Java VM"

Programming Paradigms

• applicative / functional
• LISP, MIRANDA, HASKELL, ML, …
• deductive / declarative
• Prolog, SQL, …
• imperative
• Pascal, C, Basic, COBOL, FORTRAN, …
• object-oriented
• Simula 67, Smalltalk, Eiffel, Ada 95, Java,

…