Raghav Khandelwal

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Materials to Know: Acetal and Delrin

Delrin, Acetal, and its many trade names is a material properly known as Polyoxymethylene or POM. It is one of the strongest plastics and is a good …

11 Tips for Creating a Good Weld

There are a lot of different little things you have to account for when welding. <i>Make:</i> contributor Rusty Oliver recently wrote a great piece on an introduction to welding for the hobbyist in <i>Make:</i> Volume 50 (on newsstands March 22), but he surprised us with an even more detailed checklist on how to …

Nissan Leaf Batteries Upgrade Old Truck Conversion

[Jay]’s Chevy S-10 electric conversion needed new batteries. The conversion was originally done with a bank of lead acids underneath the truck bed. …

Marathon space flight just the start for Scott Kelly, walking science experiment

The Nasa astronaut and his twin brother, who remained on Earth, was the focus of a battery of tests to investigate the viability of sending a human to Mars<p>Scott Kelly returned to Earth this week slightly taller than when he left it, irradiated, and with his eyesight changed from almost a year spent …

It’s Time the Software People and Mechanical People Sat Down and Had a Talk.

With the advances in rapid prototyping, there’s been a huge influx of people in the physical realm of hacking. While my overall view of this …

Equations

Google had over 75 million takedown requests last month

Last month, Google processed over 75 million search takedown requests under the Digital Millennium Copyright Act (DMCA), or over 100,000 links per hour. That's more than double the number of links it processed during the same period last year, and over 300 times more requests than in 2012. So why …

North Korea Threatens U.S. With Nuclear Strike Over War Games

SEOUL, South Korea — North Korea issued another threat Monday, warning of an indiscriminate "pre-emptive nuclear strike of justice" on Washington and Seoul, this time in reaction to the start of huge U.S.-South Korean military drills.<p>Such threats have been a staple of young North Korean leader Kim …

North Korea

US appeals ruling on accessing data in New York iPhone case

Calling a New York judge's ruling "an unprecedented limitation" on judicial authority, the Justice Department asked a Brooklyn federal court on Monday to reverse a decision that said Apple Inc. wasn't required to pry open a locked iPhone.<p>The government's 45-page brief comes a week after U.S. …