NMIX 2020: Final Exams
36 Cards in this Set
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Analog/Mechanical
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analog: copy reflects properties of original, continuous variation, some central feature. mechanical: physical forces/modulation, acoustic vibrations
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phonautograph
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Leon Scott de Martinville. horn, membrane, smoke-blackened paper, rotating cylinder, no playback.
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Tin-Foil phonograph
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Thomas Edison, John Kruesi. mouthpiece, stylus, tinfoil, mary had a little lamb
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Graphophone
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Bell-tainter, wax cylinder, foot cranked regulated. MBus: recording/playback. Parlors: jukeboxes
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Gramophone
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Emile Berliner. 1893, zinc master
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Enrico Carus
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1902. $2m in records, jazz (no drums)
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Analog/Electric
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No horns. microphones, speakers. records had grooves and better audio. vibration into electricity.
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Digital/Electronic
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copy doesnt reflect original. digital takes different types of pictuer
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voltage snapshots
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value that represents electricity
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sampling rates
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more dots/inch = more samples/second
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lossless compression type
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can rebuild an exact copy. LZ adaptive dictionary-based algorithm. dictionary look-up simple version
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Lossy compression
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Lose data. cant rebuild an exact copy - just approximation. sacrifice for space.
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mp3 compression
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perceptual noise shaping. geared toward ear, drops unhearable frequency
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napster
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shawn fanning. search engine of just MP3s to trade files. no centralized storage. internet relay chat.
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pigeon project
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bf skinner. the pigeon guided missile
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norbert weiner
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father of cybernetics. automatic firing missile
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active sensor
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inject light to detect change. i.e. radar
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passive sensor
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absorb light i.e. the lens of a camera
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why are accelerometers used in phones
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pedometer apps, shake to undo, tilt to steer games
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nest
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monitor a/c from your phone. reduces bills/waste
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low power towers allow...
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frequency reuse and smaller batteries
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ESN
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electronic serial number. programmed at manufacturers
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MIN
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mobile ID number. 10 digits, have to register/program at activation
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SID
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System ID code. each service has one. have to register it/programmed at activation
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MTSO
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mobile telephone switching office. connected to each tower with land lines and to regular phone system. one/city for making/receiving calls
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process of making phone calls
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phone listens for SID, compares SID to one in phone, phone transmits request to MTSO, MTSO picks up frequency pair, communicates over control chanel, talk on 2 way radio, monitors channel strength
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BLUE 1:
Which of the following is NOT a behavior response in order to make the Athens lifestyle better?
a. Increase volunteering and participate in mentor programs
b. Shop at local businesses
c. Support and spend on Art
d. Hand money to homeless when asked downtown
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d. Hand money to homeless when asked downtown
Don’t give $$ directly to panhandler, put it in the meter
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RED 3:
True or False? Every 60 days, more content is uploaded onto YouTube than all content produced by broadcast networks over the last 60 years.
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True
Every 60 days, more content is uploaded onto YouTube than all content produced by broadcast networks over the last 60 years.
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RED 3:
What did the first telegraph message say?
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The first telegraph message was by Samuel Morse… “What hath god wrought?”
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RED 3:
What two values make up a bit?
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0 and 1
A bit is the basic unit of information in computing and telecommunication. The communication method used is a series of 0s and 1s.
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RED 3:
What machine inspired Gutenberg to make the printing press?
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A wine press
Gutenberg was inspired to make the printing press after observing a wine press.
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RED 3:
What value number value does a white pixel have?
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A white pixel has a value of 0
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RED 3:
Using different intensities of what three colors make all other colors?
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Red, Green, and Blue are the principle colors for the internet. All other colors derive from various intensities of those three colors.
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RED 3:
Why does a 1.0 version of Internet Explorer not exist?
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Because Netscape was already on 2.0 when Internet Explorer entered the market, so their first version was 2.0.
Internet Explorer 1.0 does not exist because by the time it was ready for launch, Netscape was already in 2.0, so Microsoft decided to release their browser as 2.0.
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RED 3:
Prior to 1964 computer networks were centralized, making them a dangerously easy target for attack. Who/what helped it become decentralized so it was no longer controlled by one main base?
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RAND Study
The RAND Study decentralized computer networks and created the internet as we know it. Prior to 1964, the networks were centralized, which made it very dangerous in case of an attack (by the Soviets).
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RED 3:
The Titanic played a large role in the development of media. This was because:
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A: The event led to the Radio Act of 1912.
The Radio Act of 1912 required all seafaring vessals to maintain 24-hour radio watch. This was created in response to the sinking of the Titanic
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NMIX 2020: Midterm