The way to change the world…
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Educate-Inspire-Change
Empty Suit
Definition: An amateur who's been given the power to set the goals & objectives for professionals to follow, and thinks of himself as a strong leader.Ethics
"Veritas vos liberabit"
"It's better to build something 100 people love, than something that 1M people kind-of-like" -- Brian Chesky
"Rättvisa handlar inte om lika utfall, utan om lika spelregler" -- Alice Teodorescu
“The mediocre teacher tells. The good teacher explains. The superior teacher demonstrates. The great teacher inspires.” ― William Arthur Ward
When the facts change, I change my mind. What do you do, sir?" -- John Maynard Keynes
""Don't attribute to stupidity what can be adequately explained by a contract." -- Anonymous
"Without deviations from the norm, progress is not possible" -- Frank Zappa
"I must study politics and war that my sons may have liberty to study mathematics and philosophy and they in turn must study those subjects so that their children can study painting, poetry, music, architecture, statuary, tapestry, and porcelain." -- John Adams, Americas II president
"In a time of universal deceit - telling the truth is a revolutionary act." -- George Orwell
"The only thing necessary for the triumph of evil is for good men to do nothing." -- Edmund Burke
"Being normal is being merely average" -- Shawn Achor
“It is difficult to get a man to understand something, when his salary depends on his not understanding it.” -- Upton Sinclair
"I do not agree with what you have to say, but I'll defend to the death your right to say it." -- VoltaireSystems view
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Tag Archives: Simulation
Demographics simulation
There’s some interesting reading about demographics and Global birthrates: as you might have learned from the news, the birthrates in meny advanced (mostly western) countries are declining, in some places to such low levels that should the trend continue, those populations … Continue reading
Posted in Culture, Organization, Politik, Simulation, Society
Tagged Culture, Demographics, environment, organization, Politics, Simulation, Society
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Radar Plotting & Trial Manouver on iPad/iPhone
Posted in development, Maritime Technology, Nautical Information Systems, Technology
Tagged Numpy, Python, Radar, Simulation, Technology
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Algorithm analysis – Big O notation
Continuing from my previous post on performance analysis of algoritms, I decided to plot the CPU-time over the size of the problem, that is, the number of cells. The two graphs above, both plotted ‘log-log’, demonstrate a straight line. A straight … Continue reading
Single simulation run consuming 230 h (!) of cpu-time – root cause analysis of performance
I think I’ve broken some kind of record of CPU-time consumption for a single simulation run… for a fairly trivial application… As my frequent readers know, I’ve been playing lately with a simulation of Shelling’s segration model (see previous posts … Continue reading
Posted in Big Data, development, software
Tagged HPC, Optimization, programming, Python, Simulation
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Animation of Thomas Shelling’s Segregation model
Programmed in Python, NumPy, SciPy and Prof. John Zelle’s Graphics Library
Graphics programming with Python
For reasons unknown to me, probably psychological, I’ve always hated graphics programming…. Never touched it, if I could avoid it… Over the past 40 years that I’ve been programming,professionally as well as privately, most of the time making ‘the pedal … Continue reading
Schelling’s segration model: evolution
The image above shows the evolution, per iteration, for a run of the Schelling simulation. The upper left grid shows the initial condition, which is a randomly arranged state. The seven remaining grids show the state of the board after … Continue reading
There’s a bug in my program: The enormous difference between < and <=
I’ve found a bug in my program! A bug, in my program…! And I’m a pro hacker, how shameful…! 🙂 Scary, isn’t it… a simple bug, a single character among the thousands of characters in my program… that single character … Continue reading
Segregation – technical details
Just a few details to the more technically inclined readers of this blog: The image below has three sections: the leftmost showing the results in terms of where the agents prefer to be, the middle image showing a heatmap over … Continue reading
Segration demo by computational agent simulation
For the fun of it, (and to learn more about Numpy’s multidimensional arrays) I decided to repeat Thomas Shelling’s famous experiment which demonstrates that segregation based on any real or imagined divider, such as gender, income, language,age, ethnicity, race, social status, … Continue reading
