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T 11/1/011
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HW due: Read pp. 143-154 in
the blue textbook. Reading notes are required, as always.
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W 11/2/011
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HW due: Read pp. 161-173 (reading
notes required, as always); then write up the following problems.
1. Who is depicted in this image?
2. Does your answer to #1 change if you view the image from a distance of
about 12 feet from the computer screen?
3. Explain your answers to #1 and #2 by using ideas from today’s reading.
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Th
11/3/011
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HW due: Read pp. 186-194;
write #7 on p. 195.
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F 11/4/011
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No school (faculty meetings).
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M 11/7/011
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No class.
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T 11/8/011
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HW due:
1. Write a 1-paragraph project proposal in which you describe (in general
terms) a topic you would like to explore in depth. A written report will be
due on Monday, 12/19/2011, and you will give a presentation to the class
(with at least one visual aid required) during the week of Jan. 3-6. In your
paragraph, briefly mention or describe (a) the topic itself, (b) what sorts
of books/media/on-line references you intend to use to research your topic,
and (c) a prediction of what type(s) of visual aid you will use in January.
Examples of visual aids include a PowerPoint slide show, a video, a piece of hardware for show-and-tell, a musical
performance, or a flip-chart show. (If you wish to use flip charts, ask Mr.
Hansen for a tablet and an easel to borrow.)
IMPORTANT: Please choose a topic that you find to be really
interesting! You can change your topic later if you wish, with permission
from Mr. Hansen. However, since only you know what is interesting to
you, the choice of topic is something that you should take seriously. Digital
data is an extremely broad area that touches on nearly everything in our
modern world: sports, entertainment, business, etc. There is definitely a
topic out there that you will enjoy.
For now, do not worry about specifying an outline of your paper. We will work
together to come up with an outline in the days ahead. Simply try to find a
topic that interests you.
2. Read pp. 196-211 in the blue textbook. Reading notes are required, as
always.
3. Write #4, 5, 6, and 7 on p. 212. For #7, notice that matrix A on p. 197 is given in decimal (base
10), so you should also give your answer in decimal.
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W 11/9/011
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HW due:
1. Read pp. 213-228 (middle). Reading notes are required, as always.
2. Write #1 on p. 223.
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Th
11/10/011
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HW due:
1. Read pp. 238-244.
2. Write #1 and #2 on p. 244.
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F 11/11/011
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HW due:
1. Read pp. 253-265.
2. Write #17, 18, 19, 20, and 26 on pp. 266-267.
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M 11/14/011
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No class.
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T 11/15/011
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HW due:
1. Read p. 276, plus pp. 281-289.
2. On pp. 278-280, write #1, 2, 4, 5, 6, 43, 44, 45, 47.
3. On pp. 290-291, write #12, 14, 15. (Give answers
in dBV.)
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W 11/16/011
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HW due:
1. Read pp. 297-311.
2. On pp. 304-305, write #4, 9, 11, 12. For #12, ignore
personalized plates and specialty plates. The standard DC format is LL NNNN,
the standard Virginia format is LLL NNNN, and Maryland has a number of
formats that are not particularly easy to categorize. (Choose one if you live
in Maryland.)
3. On p. 312, write #6, 9.
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Th
11/17/011
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HW due: Read pp. 313-323. This is fairly technical,
so read it slowly. Reading notes are required, as always, but there is no
additional written work.
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F 11/18/011
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Oops! Today’s assignment was supposed to be posted
by 3 p.m. Thursday, but because of a house furnace failure (thermostat,
actually), your Fearless Teacher was distracted and forgot to post it in
time. Thus there is no additional HW due today.
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M 11/21/011
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No class.
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T 11/22/011
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HW due:
1. Read pp. 325-331. Reading notes are required, as always.
2. On p. 331, write #1, 2, 5.
3. The information we covered last Friday is available in this
Wikipedia article. Use the method demonstrated last Friday in class
and/or the Wikipedia article to determine (a) the model year and (b) the
correct check digit for the following Vehicle Identification Number:
1GYS4AEF0BR283942
(c) Was the VIN recorded properly? How can you tell?
(d) Transpose the 8 and the 3 in the serial number portion of the VIN and try
again.
In class today: Our guest speaker, Mr. Joe Morris (STA ’62), an information
technology expert at MITRE Corporation, will show us ancient computer
artifacts and will bring Moore’s Law to life!
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W 11/23/011
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No school (Thanksgiving break).
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M 11/28/011
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School resumes. There is no required class today, but
if you would like to come in during D period for study help, please feel
free!
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T 11/29/011
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Test (100
pts.) on all recent material.
Terms you should know
dB (decibels)
dBV
Nyquist’s
Theorem (a.k.a. Shannon-Nyquist Theorem)
entropy
data compression
compression ratio
lossy compression
lossless compression
commonality of compression, encryption, and error correcting
codes = encoding
ASCII (single-byte character code)
Unicode (double-byte character code)
amplitude
frequency
wavelength
envelope
octave
range of human hearing: approx. 20 Hz to 20 KHz
sampling (A/D conversion)
bit depth = # of bits per sample
pixel
resolution
quantization noise
clipping
thresholding
masking
S/N ratio (a.k.a. SNR)
false contouring (posterization)
palette
colormap
edge detection
change detection
morphing
chromakey
bandwidth
Moiré patterns
lowpass (antialiasing)
filter
error detection
binary point (radix point)
Ohm’s Law (voltage in volts divided by resistance in ohms =
current in amperes)
Skills you should have
compute dB, given any power ratio
compute power ratio, given any number of dB
calculate S/N ratio (SNR) in dBV
calculate storage space for digital audio, still images, or video
with sound
calculate storage space when compression is involved
calculate time needed for transmission using a certain bandwidth
(Kbps, Mbps)
matrix operations (add, multiply, scalar multiply)
masking (chromakey) procedure on p. 243
(not to memorize, but understand step by step)
compute Nyquist rate
detect errors in VINs (Vehicle Identification Numbers) if given
the value and weight tables
compute voltage, resistance, or current in a simple circuit,
given any 2 of the 3
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W 11/30/011
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HW due: Read pp. 331-340. Reading notes are
required, as always.
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