Cryptography

Stencil Subtractor

The Stencil Subtractor frame was a ciphered text recyphering tool that was invented by British Army Intelligence Officer and cryptographer John Tiltman and was ready for trial by April 1941 but was not adopted officially by the British Forces until March 1942, and not brought into service until June 1943. It was used together with , placed on top of the table and the numerical values visible in the gaps of the SS Frame were used to encipher the underlying numerical code (such as the War Office Cipher, RAF cipher or Naval cipher etc.). (Wikipedia).

Video thumbnail

Evaluating Expressions Involving Inverse Cosecant, Inverse Secant, and Inverse Cotangent

Evaluate inverse trigonometric expression. http://mathispower4u.wordpress.com/

From playlist Inverse Trigonometric Functions

Video thumbnail

1.2.7

OpenStax Calculus Volume 1

From playlist OpenStax Calculus Volume 1 (By Objectives)

Video thumbnail

Find all the solutions of trig equation with cotangent

πŸ‘‰ Learn how to solve trigonometric equations. There are various methods that can be used to evaluate trigonometric equations, they include by factoring out the GCF and simplifying the factored equation. Another method is to use a trigonometric identity to reduce and then simplify the given

From playlist Solve Trigonometric Equations

Video thumbnail

Solving a trigonometric equation with cosine equal to negative one

πŸ‘‰ Learn how to solve trigonometric equations. There are various methods that can be used to evaluate trigonometric identities, they include by factoring out the GCF and simplifying the factored equation. Another method is to use a trigonometric identity to reduce and then simplify the give

From playlist Solve Trigonometric Equations

Video thumbnail

Introduction to Inverse Cosecant, Inverse Secant, and Inverse Cotangent

Introduction to the inverse functions of cosecant, secant, and cotangent http://mathispower4u.wordpress.com/

From playlist Inverse Trigonometric Functions

Video thumbnail

Solving a trigonometric equation with applying pythagorean identity

πŸ‘‰ Learn how to solve trigonometric equations. There are various methods that can be used to evaluate trigonometric equations, they include factoring out the GCF and simplifying the factored equation. Another method is to use a trigonometric identity to reduce and then simplify the given eq

From playlist Solve Trigonometric Equations by Factoring

Video thumbnail

Support Vector Machines - Part 1: Introduction

This video is about Support Vector Machines - Part 1: Introduction Abstract: This is a series of videos about Support Vector Machines (SVMs), which will walk through the introduction, the working principle and theory covering a linearly separable case, non-separable case, nonlinear SVM an

From playlist Machine Learning

Video thumbnail

How to solve an equation with cosine

πŸ‘‰ Learn how to solve trigonometric equations. There are various methods that can be used to evaluate trigonometric identities, they include by factoring out the GCF and simplifying the factored equation. Another method is to use a trigonometric identity to reduce and then simplify the give

From playlist Solve Trigonometric Equations

Video thumbnail

Totient Function - Applied Cryptography

This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.

From playlist Applied Cryptography

Video thumbnail

OpenGL - depth and stencil buffers

Code samples derived from work by Joey de Vries, @joeydevries, author of https://learnopengl.com/ All code samples, unless explicitly stated otherwise, are licensed under the terms of the CC BY-NC 4.0 license as published by Creative Commons, either version 4 of the License, or (at your o

From playlist OpenGL

Video thumbnail

Lehmer Factor Stencils: A paper factoring machine before computers

In 1929, Derrick N. Lehmer published a set of paper stencils used to factor large numbers by hand before the advent of computers. We explain the math behind the stencils, which includes modular arithmetic, quadratic residues, and continued fractions, including my favourite mathematical vi

From playlist Joy of Mathematics

Video thumbnail

Factor Stencils Review / HowTo

Factor stencils based on a design from the 1920s by D. N. Lehmer. His will factor any number up to 3,000,000,000,000. Mine are smaller, so only factor up to 200,000. This is episode 37 of my video series about calculating devices. Visit my site for PDFs and SVGs to download and make your

From playlist Calculating Devices Review / HowTos

Video thumbnail

Vacuum Tube Computer P.01 – Architecture and the MC14500B

In this episode, we take our first step towards building a vacuum tube computer! There’s a lot of different architectures out there, so we take a look at one that will hopefully work well for us. This is going to be a long road with lots of speedbumps and testing along the way. It should b

From playlist Vacuum Tube Computer

Video thumbnail

Totient - Applied Cryptography

This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.

From playlist Applied Cryptography

Video thumbnail

Office Automation & Business Machines 1947 (IBM Chinese Character Typewriter, China, full video)

A Pre-Computer Look at Office Automation & Business Machines of 1947. This Vintage film describes many high-end business machines found in offices of the 1940’s, including the IBM Chinese Character Typewriter, and various machines for filming, stenciling, folding, lithographing, micofiche

From playlist Word Processing, Office Automation, Electronic Office Tools

Video thumbnail

EEVblog #415 - SMD Stencil Reflow Soldering Tutorial

Dave shows you how easy it is to do surface mount SMD reflow soldering with a solder paste stencil and a hot air gun: http://astore.amazon.com/eevblogstore-20 Hints and tips for quick and easy component placement, solder paste application, and reflow soldering using cheap easy to get tool

From playlist Soldering

Video thumbnail

Legend of Zelda Coding Tutorial - CS50's Intro to Game Development

Learn game development by creating a Legend of Zelda clone game using Lua and LΓ–VE2D. The principles you learn can apply to any programming language. This beginner's course teaches the foundations of game development. This video is lecture 5 of CS50's Intro to Game Development from Harvar

From playlist CS50's Introduction to Game Development

Video thumbnail

Adam Savage's One Day Builds: Painting Iron Man Armor!

What is Adam's favorite part of making? The paint, of course! Wanting a beaten-up, shiny metal finish for his Iron Man Mark I suit, Adam applies a gloss black undercoat, adds liquid chrome, then seals it all with a clear coat. But the job's only half done; Adam needs to wait a week for the

From playlist Adam Savage's One Day Builds

Video thumbnail

How to evaluate the composition of tangent inverse and cotangent

πŸ‘‰ Learn how to evaluate an expression with the composition of a function and a function inverse. Just like every other mathematical operation, when given a composition of a trigonometric function and an inverse trigonometric function, you first evaluate the one inside the parenthesis. We

From playlist Evaluate a Composition of Inverse Trigonometric Functions

Video thumbnail

Legend of Zelda - Lecture 5 - CS50's Introduction to Game Development 2018

00:00:00 - Introduction 00:06:04 - Legend of Zelda Demo 00:08:24 - Zelda Sprites 00:15:48 - Top-Down Perspective 00:17:52 - Dungeon Generation 00:24:08 - World Classes 00:32:18 - Infinite Dungeon Algorithm 00:38:30 - Room 00:44:48 - Entities and Game Objects as Data 00:56:03 - Stenciling 0

From playlist CS50's Introduction to Game Development 2018

Related pages

Ciphertext | Cryptography