CourseWiki - CS 448B. The world is awash with increasing amounts of data, and we must keep afloat with our relatively constant perceptual and cognitive abilities.
Visualization provides one means of combating information overload, as a well-designed visual encoding can supplant cognitive calculations with simpler perceptual inferences and improve comprehension, memory, and decision making. Furthermore, visual representations may help engage more diverse audiences in the process of analytic thinking. In this course we will study techniques and algorithms for creating effective visualizations based on principles from graphic design, visual art, perceptual psychology, and cognitive science.
The course is targeted both towards students interested in using visualization in their own work, as well as students interested in building better visualization tools and systems. There are no prerequisites for the class and the class is open to graduate students as well as advanced undergraduates. Schedule. Chart for Learning a Programming Langauge. Documentation : : Ffmpeg [] {[] -i ‘input_file’} ... {[] ‘output_file’} ... ffmpeg is a very fast video and audio converter that can also grab from a live audio/video source.
It can also convert between arbitrary sample rates and resize video on the fly with a high quality polyphase filter. ffmpeg reads from an arbitrary number of input "files" (which can be regular files, pipes, network streams, grabbing devices, etc.), specified by the -i option, and writes to an arbitrary number of output "files", which are specified by a plain output filename.
Anything found on the command line which cannot be interpreted as an option is considered to be an output filename. Each input or output file can, in principle, contain any number of streams of different types (video/audio/subtitle/attachment/data). To refer to input files in options, you must use their indices (0-based). As a general rule, options are applied to the next specified file. The format option may be needed for raw input files.
Video Listing. Systems Programming at Twitter. Facebook, October 30, 2012 Marius Eriksen Twitter Inc.
(Press space or enter to navigate to the next slide, left arrow to go backwards.) A history lesson Twitter evolves 2009: Pure Ruby-on-Rails app with MySQL; lots of memcache. This is the context of our work. Late 2012 architecture Many open source components. LinkedIn Signal: A Case Study for Scala, JRuby and Voldemort. How to Crack the Toughest Coding Interviews, by Gayle McDowell, ex-Google Engineer & hiring committee member.
[A guest blog post for Geeklist by Gayle Laakmann McDowell.
Gayle is the founder / CEO of CareerCup, and the author of Cracking the Coding Interview (Amazon.com’s #1 best-selling interview book) and The Google Resume. Gayle has worked a software engineer for Microsoft, Apple and Google, and served on Google’s hiring committee. You can follow her on Twitter, Facebook, Quora, or her blog.] / public - Snipt. Learning to write GOOD JavaScript. Easy, proactive monitoring of processes, programs, files, directories and filesystems on Linux/Unix.
How To Set Up Your Linode For Maximum Awesomeness » Feross.org. So, you followed the advice in my Linode Hosting Review and decided to host your website with Linode.
Excellent choice! But, if you’re new to the command line (perhaps you are familiar with CPanel or Plesk?) Faunus.
How do I run a Unix process in the background. In Unix, a background process executes independently of the shell, leaving the terminal free for other work.
To run a process in the background, include an & (an ampersand) at the end of the command you use to run the job. Following are some examples: To run the count program, which will display the process identification number of the job, enter: count &To check the status of your job, enter: psTo bring a background process to the foreground, enter: fgIf you have more than one job suspended in the background, enter: fg %# Replace # with the job number, as shown in the first column of the output of the jobs command.You can kill a background process by entering: kill PID Replace PID with the process ID of the job. Everything Sysadmin: 4 unix commands I abuse every day. 1. grep dot (view the contents of files prefixed by their filename) I want to view the contents of a few files but I want each line prepended with the the file's name.
My solution? $ grep . *.txt jack.txt:Once upon a time jack.txt:there was a fellow named Jack. lyingryan.txt:Now that "trickle down economics" has been lyingryan.txt:tested for 30 years and the data shows it lyingryan.txt:has been a total failure, candidates lyingryan.txt:still claim that cutting taxes for lyingryan.txt:billionaires will help the economy. market.txt:Jack went to market to sell the family market.txt:cow. market.txt:He came back with a handful of magic beans. $ grep is a search tool. Note that ". " matches lines with at least 1 character. Web Tutorials and Resources That Don't Suck.