Fourier analysis | Statistical signal processing
SigSpec (acronym of SIGnificance SPECtrum) is a statistical technique to provide the reliability of periodicities in a measured (noisy and not necessarily equidistant) time series. It relies on the amplitude spectrum obtained by the Discrete Fourier transform (DFT) and assigns a quantity called the spectral significance (frequently abbreviated by “sig”) to each amplitude. This quantity is a logarithmic measure of the probability that the given amplitude level would be seen in white noise, in the sense of a type I error. It represents the answer to the question, “What would be the chance to obtain an amplitude like the measured one or higher, if the analysed time series were random?” SigSpec may be considered a formal extension to the Lomb-Scargle periodogram, appropriately incorporating a time series to be averaged to zero before applying the DFT, which is done in many practical applications. When a zero-mean corrected dataset has to be statistically compared to a random sample, the sample mean (rather than the population mean only) has to be zero. (Wikipedia).
Everything Matters | Silicon | Ron Hipschman | Exploratorium
Thrown from supernovae, silicon is the eighth most abundant element in the universe and second only to oxygen in the Earth’s crust, which is primarily comprised of silicate compounds, including silica (SiO2), or quartz, commonly found in sand. Silica is absorbed by plants and transformed i
From playlist Tales from the Periodic Table
Arrowhead Sierpinski Triangle construction.
This is a recreation of a short clip from a long form video showing six different ways to construct the Sierpinski triangle: https://youtu.be/IZHiBJGcrqI In this short, we create the Sierpinski triangle using the arrowhead construction. Can you explain why this works? #math #manim #fract
From playlist Fractals
Citrix : Web Interface website for the Citrix Access Gateway
More videos like this online at http://www.theurbanpenguin.com Here we take a look at creating a Citrix Web Interface web site to support the Citrix Access Gateway. In doing so we will also look at the importance of backing up the webinterface.conf and using that as a template fro new site
From playlist Citrix
Citrix : Web Interface enabling HTTPS
More videos like this online at http://www.theurbanpenguin.com In this video we take a look at enabling HTTPS access with SSL to the WebInterface Server. With the later Citrix Receivers HTTPS is becoming the Protocol of choice and certainly when used with the Citrix Access Gateway we shoul
From playlist Citrix
More videos like this online at http://www.theurbanpenguin.com In this video we look at installing SSL certificates to the Apache HTTPD server so that we can have secure connections with HTTPS
From playlist LPIC-2
An intro to the core protocols of the Internet, including IPv4, TCP, UDP, and HTTP. Part of a larger series teaching programming. See codeschool.org
From playlist The Internet
Spontaneous Combustion: Silane Gas
This is a short exert of my synthesis video: How to make Magnesium Silicide and Explosive Silane Gas.
From playlist Spontaneous Combustions
LPIC-3 303 SELinux contexts explained
More videos like this online at http://www.theurbanpenguin.com In this vdeo we look at explaining the conecepts and makeup of a SELinux context. SELinux will try to match the context of the process to the context of the resource being accessed; the SELinux policy in effect will specify wha
From playlist LPIC-3
Types of Silicates Part 2: Inosilicates, Phyllosilicates, and Tectosilicates
In the previous tutorial we learned about some types of silicates, so now let's learn about the rest. That will be inosilicates, phyllosilicates, and tectosilicates. These can get pretty complicated so let's take a closer look! Script by Jared Matteucci and Bryne Hadnott Watch the whole
From playlist Geology