jchook

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Math ∩ Programming

Tai-Danae Bradley is one of the hosts of PBS Infinite Series, a delightful series of vignettes into fun parts of math. The video below is about the …

Mathematics

The Dying Art of Mental Math Tricks

Without using a calculator, can you tell how much 752 is? If you are reading my blog, with high probability you know that it is 5625. The last two …

Mathematics

Category Theory and Declarative Programming

This is part 11 of Categories for Programmers. Previously: Natural Transformations. See the Table of Contents. Introduction to Part II In the first …

Programming

New Erdős Paper Solves Egyptian Fraction Problem

Ancient Egyptians were thought to have used different parts of the Eye of Horus to represent unit fractions, up to the first six powers of 2. Credit: …

Mathematics

Class of 1984: Lisa Randall | News | The Harvard Crimson

As a college freshman, Lisa J. Randall '84 stood out for many reasons. In her first semester, she enrolled in Math 55 and Physics 55, the most …

Cost of a Ding of Whats App

TL;DR I am thrilled to see how brain activity changes based on various activities, It takes 10 seconds to recover cellphone message notification …

New Derivation of Pi Links Quantum Physics and Pure Math | American Institute of Physics

WASHINGTON, D.C., November 10, 2015 <i>–</i> In 1655 the English mathematician John Wallis published a book in which he derived a formula for pi as the …

Quantum Mechanics

Beautiful circuits: The dawn of the cyborg rose

Scientists have wound electronic circuits into plants' vascular tissues for the first time, paving the way for potential energy …

Nanotech

Gasp! A Breathing Puzzle

We want to talk to you about breathing — something you do all the time (if you don’t, we have no idea how you’re reading this.) Breathing, of course, …

Insects

CIA Email Hackers Return With Major Law Enforcement Breach

Hackers who broke into the personal email account of CIA Director John Brennan have struck again.<p>This time the group, which goes by the name Crackas …

Ancillary Copyright 2.0: The European Commission is preparing a frontal attack on the hyperlink

<b>The European Commission is preparing a frontal attack on the hyperlink, the basic building block of the Internet as we know it.</b> This is based on an …

Europe

The Superconductor That Works at Earth Temperature - MIT Technology Review

The world of superconductivity is in uproar. Last year, Mikhail Eremets and a couple of pals from the Max Planck Institute for Chemistry in Mainz, …

Physics

There are no rules in math - Comfortably Numbered

We tell them that all these hammers will be useful in <i>careers</i>.<p>And that’s true. Economists use math-hammers all the time. So do physicists and chemists …

When the Earth Had Two Moons - Issue 13: Symmetry

For more than half a century, the moon had been mocking the best minds in science, and for Erik Asphaug enough was enough.<p>The taunting began three …

Astronomy

Wordpress Brute Force Attacks Using Multiple Passwords Per Login Via XML-RPC

An anonymous reader writes: <i>Online security firm Sicuri note a vertical rise in brute force attacks against WordPress websites using Brute Force</i> …

Kilogram conflict resolved at last

After a fraught few years, experiments to redefine the unit have reached agreement.<p>For decades, metrologists have strived to retire ‘Le Grand K’ — …

Physics

Laser razor kicked off Kickstarter

<b>A crowdfunding campaign for a razor blade which its US creators claimed could remove facial hair with a laser beam has been suspended by Kickstarter.</b><p>The device had attracted more than $4m (£2.6m) in funding - but reportedly did not have a working model.<p>Backers received an email from Kickstarter …

Crowd Funding

Laser surveys light up open data - Creating a better place

For the last 17 years the Environment Agency has used lasers to map and scan the English landscape from above to help us carry out work such as flood …

Amazon’s $23,698,655.93 book about flies

A few weeks ago a postdoc in my lab logged on to Amazon to buy the lab an extra copy of Peter Lawrence’s <i>The Making of a Fly</i> – a classic work in …

Shopping

First light-based memory chip puts SSDs on notice

Researchers have created the first optical-only chip that can permanently store data, a discovery that could lead to storage devices that leave SSDs in the dust. Non-volatile flash memory currently relies on electronic chips, which are speed-limited by the heat and resistance generated by colliding …

Nanotech

ES6 Tail Call Optimization Explained

19 Jul 2015<p>From Wikipedia: “A tail call is a subroutine call performed as the final action of a procedure.”<p>A tail call optimization may occur when …

PizzaHack

This repository typically contains an interactive SQL Injection tutorial. Due to a content licensing and distribution issue - this repositoriy is not …

A Tricky Path to Quantum-Safe Encryption

In the drive to safeguard data from future quantum computers, cryptographers have stumbled upon a thin red line between security and efficiency.<p>On …

Mathematics

Data Structure Visualization

Basics<p>Stack: Array Implementation<br>• Stack: Linked List Implementation<br>• Queues: Array Implementation<br>• Queues: Linked List Implementation<br>• Lists: Array …

HTTP Client Testing Service

httpbin(1): HTTP Request & Response Service<p>BONUSPOINTS<p>now.httpbin.org The current time, in a variety of formats.<p>ENDPOINTS<p>/ This page.<br>• /ip Returns …

Web Development