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How To: Make a Powerful PVC Air Cannon with Coaxial Piston Valve

The video featured in this article demonstrates the function and design of a powerful form of air cannon that operates using a purpose made valve that opens very rapidly. This allows for a massive amount of pressurized air to be released at once to throw a projectile many hundreds of yards. The design of the cannon also allows the barrel and the air chamber to occupy the same space, and so it is very compact and manageable which makes for an enjoyable shooting experience.

How To: Search for Photos on Your Computer by Exact Dimensions

As a technology writer, phone screenshots can pile up on your computer in no time. Testing out different apps, showing buggy software, and doing step-by-steps can lead to a plethora of mobile screenshots piling up on your computer's desktop. The problem with my screenshots is that they save as photo.png or photo.jpeg, as do many of my other photos. If I haven't finished a project or article, I tend to move them to different folders to save them for later. After a while, the screenshots begin ...

How To: Control the Music on Your Computer with Hand Gestures Using Flutter

Thanks to Flutter, it's now possible to control the music on your computer simply by making a few hand gestures. The app is available for both Windows and Mac and uses your computer's webcam to monitor your hand movements. Through the use of a few simple hand movements, you can play, pause, forward or replay your music. Flutter works with iTunes, Spotify, Quicktime, MPlayerX and a few other programs.

How To: Get Faster Download Speeds on Your Steam Games

Steam is an online platform that lets you download and play over 2,000 video games, from first-person shooters to RPGs, as well as a pretty long list of indie games. You can play on your PC, Mac, mobile device, or even your television, and it has a community of over 40 million gamers. Prices are different depending on the type of game and how new/popular it is, but they're generally about the same as what you'd pay for an Xbox or PlayStation version. They also have a decent list of free games...

How To: There's Metal Hiding in Your Pepto-Bismol and Here's How You Extract It

Got an upset stomach or a little heartburn? America's favorite pink pill will cure it right up. But did you know that there's actually metal hiding in those chewable Pepto-Bismol tablets? Yes, metal. Technically, it's a poor metal, but metal's metal, right? Well, we do tend to eat a lot of iron in our diets, because it carries oxygen throughout our bodies, so consuming metallic minerals isn't anything abnormal. But you'd never think that Pepto-Bismol is actually made up of metal.

News: This Jet-Powered, RC Dragon Can Fly Over 100mph—And It Actually Breathes Fire!

WonderHowTo has seen its fair share of dragon-related projects, from dragon wings, to dragon kites, to less-complicated origami dragons, but we've yet to see anything quite like this. Radio-control plane builder Richard Hamel built this incredible seven-foot-long, fire-breathing dragon using a JetCat P80 turbine and a 50,000 volt stun gun, with a 2.4-gigahertz touchscreen radio controller to fly it.

News: Freaking DIY Magma! Syracuse University Creates Recyclable Red-Hot Lava Flows

Believe it or not, it's possible to make your very own lava—if you have a furnace capable of heating up to 1,200 degrees Celsius, that is. Bob Wysocki and Jeff Karson started the Syracuse University Lava Project to study basaltic lava and give students a hands-on way (hypothetically, of course) to learn about it. Oh, and they also want to use it for art projects. Sign me up for that class! It all starts with 1.1 billion-year-old basalt gravel, which apparently anyone can buy. They put the gra...

How To: Treat alopecia or hair loss

Alopecia is also known as hair loss. he most common form of alopecia or hair loss that we see is alopecia areata. It usually shows itself as round patches of hair loss on the scalp, however, it can affect the facial hair and body hair. Learn some tips on how to slow and treat the loss of hair in this medical how-to video.

How To: Prevent hair loss with Rogaine

Rogaine is a popularly used produce for hair loss and regrowing hair. Rogaine is a topical form of minoxidil and its use on the scalp to help thicken the hair. Minoxidil was initially use for blood pressure medication and has discovered the patients that took minoxidil had hair growth on their bodies. Learn more about Rogaine and hair loss in this how-to video on beautification treatments.

How To: Choose and buy healthy desserts

Yes, you can have your cake and eat it too. There are a lot of light or nutritional alternatives to a lot of the desserts that we commonly use or eat. Saving room for dessert is a must for adding any treat to the end of a healthy meal. Learn some tips for buying dessert foods in this nutrition how-to video.

How To: Use Google Search Operators to Find Elusive Information

Google is an incredibly useful database of indexed websites, but querying Google doesn't search for what you type literally. The algorithms behind Google's searches can lead to a lot of irrelevant results. Still, with the right operators, we can be more exact while searching for information that's time-sensitive or difficult to find.

News: Monthly Injection Has Potential to Replace Daily Handfuls of HIV Drugs

People infected with HIV take many different types of pills every day to decrease the amount of virus in their body, live a longer and healthier life, and to help prevent them from infecting others. That could all be in the past as new clinical trials testing the safety and effectiveness of a new type of treatment — injections given every four or eight weeks — look to be equally effective at keeping the virus at bay.

News: Microsoft Sets Developers Up for Success with the Windows Mixed Reality Academy Deep Dive

At Build 2017, the annual developer's conference, Microsoft featured a Windows Mixed Reality Academy. This class was designed to get a developer started creating Mixed Reality experiences quickly. For those of us already developing for the Microsoft HoloLens, while the class — which is now available on the Microsoft website — did offer our first real chance to work with the new Acer HMD, there was not much depth.

How To: Install OpenVAS for Broad Vulnerability Assessment

OpenVAS is a powerful vulnerability assessment tool. Forked from Nessus after Nessus became a proprietary product, OpenVAS stepped in to fill the niche. OpenVAS really shines for information gathering in large networks where manual scanning to establish a foothold can be time-consuming. OpenVAS is also helpful for administrators who need to identify potential security issues on a network.

How To: Embed a Metasploit Payload in an Original .Apk File

UPDATE: This post is outdated, the latest version with the correct links and updated instructions can be found UPDATE: This post is outdated, the latest version with the correct links and updated instructions can be found at my blog, here - at my blog, here - https://techkernel.org/2015/12/11/embed-metasploit-payload-in-apk-easily/