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Showing posts from 2018

HP Probook 450 G4 - Win 10 - solution for black screen when idle

Even better reads: Data Consistency in Distributed System - CAP, PACELC My Secular Philosophy - Life, God, Knowledge, Morality, Ethics * * * Update 2022: Even after a fresh Win10 reinstall and upgrade to latest Bios the problem is still there. A way to avoid laptop blocking when idle is to disable both Sleep and Screen turn off - on "Power and Sleep" menu. Just set them all to Never, for battery and plugged in. You can set the power button and lid close to do Hibernate when you stop working, so you can save some power and heat and resume your work fast enough even without the Sleep function. You just hit the power button briefly before leaving. You might want to disable “Require sign-in” after sleep. If you still want some automatic power saving, you can enable Hibernate after like 30minutes from the Advanced power options . In order to have Hibernate available you must disable the "Hybrid sleep" in the same Sleep sub-menu. Note to self: I will not buy or recomm...

Why Kolmogorov complexity is not computable - root cause

Please check my informal introduction to "Kolmogorov complexity" if you are not familiar with the subject. In this article I will approach some less discussed ramifications of it and hopefully some new ideas: an example of a Kolmogorov compression that would require an arbitrary high amount of working memory before shrinking to the compressed string (conjecture). 1. Root cause why "Kolmogorov complexity" is uncomputable Kolmogororov complexity is uncomputable because Turing machines have a halting problem :) Let's start with the observation the the Halting problem of a Turing machine having a limited band is actually decidable, unlike the infinite band one. A "finite band Turing machine" is actually a finite state machine that will either stop without going through the same state, or will cycle infinitely. Having a limited number of possible states, it cannot run too much without repeating a previous state. As soon as the machine returns to...

Kolmogorov complexity - short, informal introduction

I want to give you an intuition about  Kolmogorov complexity , without being very formal. Basically, Kolmogorov complexity defines a measure of how small can you compress a certain string of characters. You can think about it like measuring how small can you make a file (string of characters) by compressing it with ZIP or similar. A file storing a very redundant information (like "aaaaaaaaaaaaaaaa....") can be compressed in a much smaller size compared with a random one. For calculating the "Kolmogorov complexity", the "compressed" form is considered to be something like a self-extract archive: the shortest program that can output the initial string of characters (the "file/string to be compressed"). The Kolmogorov complexity is more general and includes classical compressing algorithms. For example a Huffman code is not very powerful in compressing a string like "123456789101112131415161718192021222324..." (concatenated consecut...

Win10 adware: Microsoft Edge is safer than Google Chrome

P.S. To disable the"notifications" telling " Microsoft Edge is safer than Google Chrome" you should (it seems): Click on the Win10 icon (down-left) Write and choose: "Settings" System Notifications Turn "Off" the right notification switches. Not sure what switches are sufficient and what you might miss if put them all to "Off". Just read and try on your own judgement, no warranties. * * * This really got me angry. I was reading Facebook on my Chrome browser... laughing a bit on a joke telling that "If you ever feel useless, just remember that someone had to port Microsoft Edge on Android". Scroll a bit below, give some likes...

Electronics review

Reviews for gadgets I own Data Consistency in Distributed System - CAP, PACELC Morality series - a heptalogy Devices list: WD My Passport Portable Hard Drive 4TB, blue - WDBYFT0040BBL - 0A RASPBERRY PI MODEL B 3 Starter Kit with 32GB SD Card Case and 5 V 2.5 A Power Supply - Glob Mall Abox SUPERIOR BLAC Rii Mini I28 Wireless (QWERTZ) – Mini Keyboard Samsung Memory Card microSDHC Class High Speed Class 10 with SD Adapter, (2017 Model) - Evo Plus u3 SD Card UHS-II Lexar 1800x (32GB) (2019-06) SD Card Sandisk 200GB UHS-I that advertises 100MB/s SD Card Reader SanDisk USB 3.0 UHS-I - SanDisk SDDR-B531-GN6NN MobileMate (2019) SD Card Samsung EVO Plus, 128GB, UHS-I, advertised Read=100 MB/s, Write=90|MB/s