overview

# Overview - Easy(polynomial Recursive Iterated “Only Connect.” 2 height Log Size 2 How about the series 1 2 3 4 … n …… … n Functions x

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What is Technology? Language? Alphabets? Math? Science?

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Technology The extensions of man” -Marshall McLuhan Books are extensions of the tongue Bombs are extensions of the fist Computers are extensions of the brain Z
Electric Technology

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Electricity
Computer Science Physics (Discrete) Math, Logic Engineering Biology Bioinformatics Art Architecture Chemistry Economics Business

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Digital vs. Analog 1,0 A,C, T, G 5V, GND a,b,c. .. abacus particles fingers Electricity Sound Color Slide-rule Waves Lenses π e

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Digital Binary: 1, 0 computers Quaternary: A,C,T,G DNA Decimal: 0,1,2,3,4,5,6,7,8,9 hands 26-ary: a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v, w,x,y,z The alphabet
The Digital (binary) Abstraction High Voltage(3-5V) or Current (50 - 100 mili-amps) 1 Low Voltage(0 - 2V, GND) or Current (< 10 mili-amps) 0

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2 + 2 ≈ 4 decimal ≈ IV roman numerals ≈ cuatro spanish four english ≈ 100 binary + = Fingers are our first digits! Why base ten?
Tree Half of Square Hard (exponential)

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Unformatted text preview: Easy (polynomial) Recursive Iterated “Only Connect. ..” 2 height } Log Size 2 How about the series: 1 + 2 + 3 + 4 + … + n ? …… … n { Functions x f(x) f(x) = x^2 ? Algorithms Abu Abdullah Muhammad bin Musa al-Khwarizmi Unambiguous (terminating)? Set of instructions To perform a task ● Higher level Programming languages ● Low Level Programming Languages ● Assembly ● Machine Code ● Binary Code More Abstract Humans Less Abstract Computers Software Layers of Abstraction Abstraction ● Abstract Art ● Abstract Data Types ● Layers of abstraction in Networks, Software, and Hardware Abstraction is elegant simplification. This whole class can be summed up as: Pi is Irrational ~ 3.1415. .. i = ( 1), imaginary e is the natural exponent ~ 2.71828182. .. The Binary Numbers 1 and 0. The language of all digital computers....
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## This note was uploaded on 02/06/2011 for the course CSCI 271 taught by Professor Friedman during the Spring '11 term at CUNY Hunter.

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Overview - Easy(polynomial Recursive Iterated “Only Connect.” 2 height Log Size 2 How about the series 1 2 3 4 … n …… … n Functions x

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