The counting board is the precursor of the abacus, and the earliest known form of a counting device (excluding fingers and other very simple methods). Counting boards were made of stone or wood, and the counting was done on the board with beads, or pebbles etc. Not many boards survive because of the perishable materials used in their construction. The oldest known counting board, the Salamis Tablet (c. 300 BC) was discovered on the Greek island of Salamis in 1899. It is thought to have been used by the Babylonians in about 300 BC and is more of a gaming board than a calculating device. It is marble, about 150 x 75 x 4.5 cm, and is in the Epigraphical Museum in Athens. It has carved Greek letters and parallel grooves. The German mathematician Adam Ries described the use of counting boards in Rechenbuch auf Linien und Ziphren in allerlei Handthierung / geschäfften und Kaufmanschafft. In the novel Wolf Hall, Hilary Mantel refers to Thomas Cromwell using a counting board in 16th-century England. (Wikipedia).
Statistics Lecture 4.7 Part 1: Principles of Counting. Permutations and Combinations
From playlist Statistics Playlist 1
Statistics Lecture 4.7 Part 2: Principles of Counting. Permutations and Combinations
From playlist Statistics Playlist 1
Statistics Lecture 4.7 Part 4: Principles of Counting. Permutations and Combinations
From playlist Statistics Playlist 1
Statistics Lecture 4.7 Part 6: Principles of Counting. Permutations and Combinations
From playlist Statistics Playlist 1
Fundamental Principle of Counting Example 2
Please Subscribe here, thank you!!! https://goo.gl/JQ8Nys Short video on how to use the fundamental rule of counting, also called the rule of product or simply the multiplication rule.
From playlist Probability and Counting
Statistics Lecture 4.7: Fundamental Counting Rule, Permutations and Combinations
https://www.patreon.com/ProfessorLeonard Statistics Lecture 4.7: Fundamental Counting Rule, Permutations and Combinations
From playlist Statistics (Full Length Videos)
Java Coding - Free Response Question
This is a step by step guide for writing the Java code to complete a Free Response Question to a Java Programming Exam. Topics include integer array, class constructor, writing class methods, and using modulus to traverse an array.
From playlist Java Programming
Develop an AI to play Connect Four - Python Tutorial
Learn how to create an expert level artificial intelligence to play Connect Four using Python. We start out with a very simple implementation of just dropping a piece randomly and then progress to choosing a column based on score and then finally implementing the minimax algorithm with alp
From playlist Machine Learning
Connect Four Python Game Tutorial with pygame
Learn how to program Connect Four in Python 3 and pygame. First, see how to store the board state, and build a simple command line interface for dropping pieces. Then see how to write a function to check for wins. Finally, learn to build graphics for your game. 💻Code: https://github.com/
From playlist Python Tutorials
Inca counting boards and the table yupana
The table yupana artifacts from the Inca empire. These are often thought to be sophisticated counting boards, but there really isn't any evidence of that. Thanks to Cinzia Florio for helping to answer some of my questions. This is episode 67 of my video series about old calculating devi
From playlist Calculating Devices Review / HowTos
Code - Seminar 11 - Historical boards
Livestreaming the construction of metauni. This week we do some work on the new historical places, where past versions of boards are stored forever. The webpage for this seminar is https://metauni.org/code/ You can join this seminar from anywhere, on any device, at https://www.metauni.or
From playlist Code seminar
Tiling problems [2/2] | Dynamic Programming
A generalization of how to solve tiling problems using dynamic programming Previous video: https://youtu.be/gQszF5qdZ-0 Tiling problems: https://projecteuler.net/problem=114 https://projecteuler.net/problem=115 https://projecteuler.net/problem=116 https://projecteuler.net/problem=117 Al
From playlist Dynamic Programming
#SoME2 A (hopefully) approachable and widely usable approach to solve the tile based solitaire game Minesweeper. 0:00 - Introduction 0:16 - Basic Strategy 1:38 - Abstraction 2:20 - Sets 4:05 - Smarter Strategy 6:10 - Generalising our Strategy 8:05 - Including the Flags 9:11 - Summary 10:
From playlist Summer of Math Exposition 2 videos
HP 5327B Nixie Universal Counter / DVM repair
We rescue a Hewlett-Packard 5327B Universal Counter / DVM Nixie beauty. Our sponsors - PCBWay: fast turn PCBs, https://www.pcbway.com - Electro-Rent: https://www.electrorent.com - Keysight: test instruments: https://www.keysight.com - Samtec: connectors: https://www.samtec.com - R&D Micro
From playlist HP Vintage Test Equipment
How to count to 1000 on two hands
Typically when we think of counting on two hands, we count up to 10, but fingers can contain much more information than that! This video shows how to think about counting in binary.
From playlist Shorter videos
Counting To Infinity And Beyond On A Chessboard
The numbers "infinity plus 1" and "infinity squared" sound like they are made up, but mathematicians do use such numbers in set theory. They are called transfinite ordinals and they arise in combinatorial game theory. This video demonstrates an example of a transfinite value from a special
From playlist Math Puzzles, Riddles And Brain Teasers
You will move around the clock face at random, and I will still be able to read your mind to tell you the number on which you have landed. It's simple to work out.
From playlist My Maths Videos
EEVblog #1138 - Systron Donner Counter Teardown
Teardown Tuesday An early 1970's Australian made Systron Donner Nixie tube display counter/timer. Forum: http://www.eevblog.com/forum/blog/eevblog-1138-systron-donner-counter-teardown/ EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2
From playlist Teardown Tuesday