User talk:Ksaareme: Difference between revisions

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== Decimal <--> Hexadecimal ==
== Statistics I604 ==
 
  Hexadecimal Decimal
  Primary Study Materials:
    0           0
  '''Course Homepage:'''  http://www.cs.ioc.ee/ITKStat
    1           1
  '''e-Book:'''           http://onlinestatbook.com/Online_Statistics_Education.pdf
    2           2
    3           3
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    5           5
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    9           9
    A           10
    B           11
    C           12
    D           13
    E           14
    F           15
 
 
Radio station is streaming MP3 audio at 192kbps. How many 500GB harddisks are required in order to archive 8 years of shows?
 
 
192 kbps = 192 000 bps
1 536 000 Bps
 
1500 Kb/s
1.46484375 MB/s
 
 
8 years = 2920 days = 70080 hours = 4204800 minutes = 252288000 seconds
 
 
172 228608 MB
16 8192 GB
336.384 500GB harddrives
 
== Audio and Images ==
 
  '''Audio'''
  In digital audio, 44,100 Hz (alternately represented as 44.1 kHz) is a common sampling frequency.  
Analog audio is recorded by sampling it 44,100 times per second, and then these samples are used
to reconstruct the audio signal when playing it back.
 
  '''Images'''
'''PNG''' supports palette-based images (with palettes of 24-bit RGB or 32-bit RGBA colors), grayscale images (with or without alpha channel),
and full-color non-palette-based RGB[A] images (with or without alpha channel). PNG was designed for transferring images on the Internet,
not for professional-quality print graphics, and therefore does not support non-RGB color spaces such as CMYK.
 
'''JPEG'''/JFIF supports a maximum image size of 65,535×65,535 pixels, hence up to 4 gigapixels (for an aspect ratio of 1:1).
JPEG is a commonly used method of lossy compression for digital images, particularly for those images
produced by digital photography. The degree of  compression can be adjusted, allowing a selectable tradeoff between storage size
and image quality. JPEG typically achieves 10:1 compression with little perceptible loss in image quality.
 
----
 
'''Compact Disc'''
Capacity Typically up to 700 MiB (up to 80 minutes audio)
Read mechanism 780 nm wavelength (infrared and red edge) semiconductor laser, 1200 Kibit/s (1×)
Write mechanism 1200 Kibit/s (1×)
 
Sampling 4 bit audio (2^4) gives us only 16 values, a far cry from 16-bit audio's 65,536! sample rate.  
'''Sample rate''' refers to the number of samples or measurements taken each  second from a recording.
The typical CD sample rate is 44.1kHz, or 44,100 samples per second.


  The '''bit rate''' is quantified using the bits per second unit bit/s, often in conjunction with an SI prefix such as "kilo"
  Primary Software:
(1 kbit/s = 1000 bit/s), "mega" (1 Mbit/s = 1000 kbit/s), "giga" (1 Gbit/s = 1000 Mbit/s) or "tera" (1 Tbit/s = 1000 Gbit/s).
The non-standard abbreviation "bps" is often used to replace the standard symbol "bit/s", so that, for example, "1 Mbps" is
used to mean one million bits per second.
One byte per second (1 B/s) corresponds to 8 bit/s.
 
The '''RGB565 color format''' is the same as the RGB555 color format, except that 6 bits are used for
the green value instead of 5. Therefore, all 16 bits are in use. The  organization of the pixels
in the image buffer is from left to right and bottom up.
'''RGB888''' --> 24-bit RGB (888)
 
== Statistics Lecture One, 02.01.16 ==
'''Primary Material:'''
'''Course Homepage:''' http://www.cs.ioc.ee/ITKStat
'''e-Book:'''          http://onlinestatbook.com/Online_Statistics_Education.pdf
'''
'''Primary Software'''
  '''R:''' https://www.r-project.org/
  '''R:''' https://www.r-project.org/


'''Introduction to Statistics'''
== Python I703 ==
'''Descriptive''' statistics are used for presenting, organizing and summarizing data.
'''Inferential''' statistics are about drawing conclusions about a population based on data observed in a sample.


'''Data Analysis Process'''
'''Data collection and preparation:''' Collect Data, prepare codebook, set up structure of data, enter data, screen data for errors
'''Exploration of data:''' Descriptive statistics, graphs
'''Analysis:''' Explore relationship between variables, compare groups


== Python Lecture and Practicum Notes ==
    Get an idea what to do by next week. Ideas:
 
    '''1. Pyglet,pygame or kivy for a game or simulation:'''
'''Lecture 1'''
---------------
 
Get an idea what to do by next week. Ideas:
// '''1. Pyglet,pygame or kivy for a game or simulation:'''
     1.1. MP beat em' up
     1.1. MP beat em' up
     1.2. Survival space sim, use webcam for dynamic view
     1.2. Survival space sim, use webcam for dynamic view
Line 108: Line 21:
     http://learnpythonthehardway.org/
     http://learnpythonthehardway.org/


// '''2. WebApp'''
    '''2. WebApp'''
     2.1. Budget Management with a GUI
     2.1. Budget Management with a GUI


// '''Notes:'''  
    '''Notes:'''  
     * Set up RPi web-server
     * Set up RPi web-server
     * Use '''XMind''' to map the idea first
     * Use '''XMind''' to map the idea first
Line 119: Line 32:
     * Check out Notepad++
     * Check out Notepad++


== Web App Programming Lecture and Practicum Notes ==
== Web Application Programming I702 ==
  database: MySQL -- hosts data, indexed
   
  php: Generates html, server side language
  '''node.js'''
  Apache: reads php files and over excecution to PHP interpreter
  '''ngix'''
  html: Structure and contents of the web page, (dom-tree)
  '''nchan'''
  css: styling information
 
javascript: client side programming, interacts with html
  '''Useful links:'''
ubuntu: hosts the programs ( packetization, tcp segmentation )
  http://enos.itcollege.ee/phpmyadmin/
  http://enos.itcollege.ee/~ksaareme


  HTTP requests
  '''W3C validation:''' https://validator.w3.org/
'''node.js -- php'''
 
'''ngix -- apache'''
== Node.js ==
'''nchan'''
 
Stuff about node.js.
 
== Operating Systems ==
 
Command line:


http sockets, streaming push module
    '''Options modify the behavior of commands:'''
WAMP for Windows
        ls -a lists all contents of a directory, including hidden files and directories
        ls -l lists all contents in long format
        ls -t orders files and directories by the time they were last modified
        Multiple options can be used together, like ls -alt
    '''From the command line, you can also copy, move, and remove files and directories:'''
        cp copies files
        mv moves and renames files
        rm removes files
        rm -r removes directories
    '''Wildcards are useful for selecting groups of files and directories'''


http://enos.itcollege.ee/phpmyadmin/
PHP and APACHE is there


http://enos.itcollege.ee/~ksaareme to see changes


'''W3C validation''' https://validator.w3.org/
    '''Redirection reroutes standard input, standard output, and standard error.'''


== Node.js ==
    '''The common redirection commands are:'''
        > redirects standard output of a command to a file, overwriting previous content.
        >> redirects standard output of a command to a file, appending new content to old content.
        < redirects standard input to a command.
        | redirects standard output of a command to another command.


Stuff about node.js.
    '''A number of other commands are powerful when combined with redirection commands:'''
        sort: sorts lines of text alphabetically.
        uniq: filters duplicate, adjacent lines of text.
        grep: searches for a text pattern and outputs it.
        sed : searches for a text pattern, modifies it, and outputs it.

Latest revision as of 14:57, 6 February 2016

Statistics I604

Primary Study Materials:
Course Homepage:  http://www.cs.ioc.ee/ITKStat
e-Book:           http://onlinestatbook.com/Online_Statistics_Education.pdf

Primary Software:
R: https://www.r-project.org/

Python I703

    Get an idea what to do by next week. Ideas:
    1. Pyglet,pygame or kivy for a game or simulation:
    1.1. MP beat em' up
    1.2. Survival space sim, use webcam for dynamic view
    1.3. Planet rotation simulation
    Check out 
    http://nehe.gamedev.net/
    http://learnpythonthehardway.org/

    2. WebApp
    2.1. Budget Management with a GUI

   Notes: 
   * Set up RPi web-server
   * Use XMind to map the idea first
   * Run basic website and deploy webapp to it. 
   * Check out RPi components and sensors. 
   * Buy a breadboard.
   * Check out Notepad++

Web Application Programming I702

node.js
ngix
nchan

Useful links:
  http://enos.itcollege.ee/phpmyadmin/
  http://enos.itcollege.ee/~ksaareme

W3C validation: https://validator.w3.org/

Node.js

Stuff about node.js.

Operating Systems

Command line: 

   Options modify the behavior of commands:
       ls -a lists all contents of a directory, including hidden files and directories
       ls -l lists all contents in long format
       ls -t orders files and directories by the time they were last modified
       Multiple options can be used together, like ls -alt
   From the command line, you can also copy, move, and remove files and directories:
       cp copies files
       mv moves and renames files
       rm removes files
       rm -r removes directories
   Wildcards are useful for selecting groups of files and directories



   Redirection reroutes standard input, standard output, and standard error.

   The common redirection commands are:
       > redirects standard output of a command to a file, overwriting previous content.
       >> redirects standard output of a command to a file, appending new content to old content.
       < redirects standard input to a command.
       | redirects standard output of a command to another command.

   A number of other commands are powerful when combined with redirection commands:
       sort: sorts lines of text alphabetically.
       uniq: filters duplicate, adjacent lines of text.
       grep: searches for a text pattern and outputs it.
       sed : searches for a text pattern, modifies it, and outputs it.
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