KKostya’s gists

KKostya / data

Last active August 29, 2015 13:58

{ "metadata": { "name": "Legge_per_parabola" }, "nbformat": 3, "nbformat_minor": 0, "worksheets": [ { "cells": [ { "cell_type": "markdown", "metadata": {}, "source": [ "La lungezza della curva $y(x)$ pu\u00f2 essere calcolata come\n", "\n", "$$ \\ell = \\int_{x_a}^{x_b}\\sqrt{1+\\left(\\frac{dy}{dx}\\right)^2}dx$$\n", "\n", "per la nostra parabola $y(x) = \\frac{x^2}{2b}$, $\\frac{dy}{dx} = \\frac{x}{b}$" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "L'intergale indefinito \u00e8 ([Vedi qui][1]):\n", "\n", "$$ \\int\\sqrt{1+\\frac{x^2}{b^2}}dx = \\frac{x}{2}\\sqrt{1+\\frac{x^2}{b^2}} + \\frac{b}{2} arcsinh\\frac{x}{b} + C$$\n", "\n", "\n", "[1]: http://www.wolframalpha.com/input/?i=intergrate+sqrt%281%2B%28x*x%29%2F%28b*b%29%29+dx" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "Modulo della velocita $v$ \u00e8 sempre costante. \n", "Quindi $\\ell(t) = v\\cdot t$" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "Sciegliamo condtizioni iniziali cosi: \n", "\n", "$$x(0) =

KKostya / index.html

Last active August 29, 2015 14:01

index.html

	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>

	.link {
	fill: none;
	stroke: #666;
	stroke-width: 1.5px;
	}

KKostya / GLSL collecion

Last active September 13, 2022 15:05

	http://glslsandbox.com/e#32520.0

	#### Voronoi:
	http://glslsandbox.com/e#526.0
	http://glslsandbox.com/e#552.1
	http://glslsandbox.com/e#31987.0

	#### Simple 3D
	http://glslsandbox.com/e#55.0
	http://glslsandbox.com/e#125.0

KKostya / iptables.h

Created October 15, 2014 12:43

	# Flush
	iptables -F

	# Accept ssh
	iptables -A INPUT -p tcp -m tcp --dport 22 -j ACCEPT
	# Accept outgoing connections
	iptables -I INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
	# Accept lo interface
	iptables -A INPUT -i lo -j ACCEPT

KKostya / index.html

Last active August 29, 2015 14:11

	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>
	.node circle { fill: #fff; stroke: steelblue; stroke-width: 1.5px; }
	.link { fill: none; stroke: #ccc; stroke-width: 1.5px; }
	</style>
	<body>
	<input id="toparse" type='text' style="width:500px" value="42 * (111+10) / (7+4)"/>
	<script src="http://d3js.org/d3.v3.min.js"></script>

KKostya / index.html

Last active June 1, 2017 21:27

Shunting yard AST building

	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>
	.node circle { fill: #fff; stroke: steelblue; stroke-width: 1.5px; }
	.link { fill: none; stroke: #ccc; stroke-width: 1.5px; }
	</style>
	<body>
	<input id="toparse" type='text' style="width:500px" value="42 * (111+10) / (7+4)"/>
	<script src="http://d3js.org/d3.v3.min.js"></script>

KKostya / index.html

Last active August 29, 2015 14:12

Token stream visual

	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>
	.link { stroke: #999; }
	</style>
	<body>
	<script src="http://d3js.org/d3.v3.min.js"></script>
	<script>

	function formatNode()

KKostya / setup.sh

Last active August 29, 2015 14:15

OpenStack VM setup

	# Instance Boot Source : SLC6 Server
	# don't forget to create and select a key pair

	################## First we'll create a partition on the ephemeral storage
	ssh root@name-of-instance

	fdisk /dev/vda
	u # switch to other untis
	n # new partition
	p # primary

KKostya / CERN_OpenStack.py

Last active August 29, 2015 14:15

Fabric everywhere

	import StringIO
	from fabric.api import *

	env.hosts = [""]

	krbconf = StringIO.StringIO("""
	[libdefaults]
	default_realm = CERN.CH
	ticket_lifetime = 24h
	renew_lifetime = 7d

KKostya / install.sh

Created May 10, 2015 20:48

rabbitmq script

	wget http://www.erlang.org/download/otp_src_17.5.tar.gz
	wget https://www.rabbitmq.com/releases/rabbitmq-server/v3.5.1/rabbitmq-server-generic-unix-3.5.1.tar.gz

	tar xvvf otp_src_17.5.tar.gz


	cd otp_src_17.5
	./configure --prefix=$PWD/../erlang
	make && make install
	cd -

Kostya KKostya