Critical Situations Search Results

How To: Parallel Programming with OpenMP: A Quick Introduction

As many of you know, processor's clock frequency improvement got stuck in about 2003, causing the origin of multicore CPU (and other technologies). In this article I'll introduce you on how to run code simultaneously in various processors (I suppose that all of you have a multicore CPU). When you write code without any parallel directive, it only executes in one CPU at the same time (see it below). OpenMP make simple to work with various cores (if not with all of them) , without so much heada...

Hack Like a Pro: How to Find the Exact Location of Any IP Address

Welcome back, my tenderfoot hackers! Have you ever wondered where the physical location of an IP address is? Maybe you want to know if that proxy server you are using is actually out of your local legal jurisdiction. Or, maybe you have the IP address of someone you are corresponding with and want to make certain they are where they say they are. Or, maybe you are a forensic investigator tracking down a suspect who wrote a threatening email or hacked someone's company.

Hack Like a Pro: How to Spy on Anyone, Part 2 (Finding & Downloading Confidential Documents)

Welcome back, my tenderfoot hackers! A short while ago, I started a new series called "How to Spy on Anyone." The idea behind this series is that computer hacking is increasingly being used in espionage and cyber warfare, as well as by private detectives and law enforcement to solve cases. I am trying to demonstrate, in this series, ways that hacking is being used in these professions. For those of you who are training for those careers, I dedicate this series.

How To: Lock the Dialer to Prevent Snooping When Letting Others Borrow Your Android

Lending someone your phone to make a call is always an awkward situation, as you closely monitor them to make sure they stick to a phone call rather than wandering off into private applications like your photo or messaging apps. You don't necessarily want to eavesdrop on their conversation, but trusting people with your phone is difficult, especially if you have some risqué or embarrassing pictures stored on it.

Hack Like a Pro: Abusing DNS for Reconnaissance

Welcome back, my tenderfoot hackers! As you know, DNS, or Domain Name System, is critical to the operation of the Internet. It provides us with the ability to type in domain names such as www.wonderhowto.com rather than the IP address. This simple service saves us from having to memorize thousands of our favorite website IP addresses. Instead, we simply type in a domain name to retrieve the website.

How To: Use a Light Bulb and the Sun to Make a Fire

Don't throw away your dead light bulbs, they may come in handy one day. This video will show you how to start a fire using a dead lightbulb. And no electricity. The tricky part is emptying out the insides, but this can be done with sticks and stones, assuming you're in a survival situation and just happen to have a light bulb with you for whatever reason.

How To: Disable Automatic Maintenance Windows 8

In this Windows 8 Tutorial you will learn how to disable automatic maintenance. Their are really two situations I can think of when you would want to disable automatic maintenance in Windows 8. The first being if your Windows 8 computer came with a Solid State Disk then you will probably want to disable automatic maintenance. The reason being is that a solid state disk does no benefit from defrags and the automatic maintenance automatically defrags your hard drive and this will take away from...

How To: Need a Remote for Your MacBook? Use Your Android Device

As most everyone knows, Android and Apple don't get along so well. Even the users don't get along well, with Android and iPhone users constantly berating and insulting each other online—any chance they get. I should know, since I was one of them, but I'm now rare breed who's learned to appreciate both. People just need to realize that they have their own unique strengths—Android with its customization and Apple with its simplicity.

How To: Lose Your Connection? This Add-On for Chrome and Firefox Helps You Recover Missing Text and Erased Forms

We've all had that awful, sinking feeling when something you've been typing away at is suddenly gone. Maybe you accidentally hit the Back button, lost your internet connection, or your computer crashed, but whatever the reason, losing your work totally sucks. A lot of word processing programs have a built-in auto-save feature to prevent you from losing everything, but most websites and blogs haven't gotten there yet. An extension for Chrome and Firefox called Lazarus: Form Recovery can help y...

How To: Unlock a Bathroom Door

How to unlock a bathroom / bedroom door that has a privacy door handle set installed. Have you ever been in that situation where you have accidently locked yourself out of your bathroom or bedroom, or your toddler has accidently locked themselves in the bathroom / bedroom and you can't get them out! The first thing to do is not panic! Don't call the locksmith and don't reach for the closest sledge hammer and commence smashing the door in. it really is easy to open the door when you know how.I...

How To: Shut Down Your PC and Send Other Commands Remotely Through Twitter Using TweetMyPC

Ever been halfway to work or school and suddenly remembered you forgot to log off your computer? A lot of people are constantly logged in to email and social media accounts, so if you have a mischievous roommate or sibling, this situation could be disastrous. That's where TweetMyPC comes in—it's a free Windows application that lets you send commands to your computer just by tweeting. Image by Twittermania

How To: Turn Your Smartphone Pics into Extra Cash with These Android and iPhone Apps

Everything is documented these days, thanks to the Internet and mobile devices. Most people who own a smartphone use it to take lots of pictures. If you're one of those people, an app called Scoopshot can help you turn some of those photos into extra cash. Scoopshots lets you post your pics so that news organizations can pay you to use them. Companies can also post tasks, so if someone is looking for a particular photo in your area, you can accept the task, go take the photo, and earn money f...

How To: Light a Fire with Your Pee!

This isn't looking good at all. What was supposed to be an easy day hike is quickly turning into a life-threatening situation. Your highest priority is to get a fire going before nightfall. But you can't use your water bottle because all of your clean water is gone. This is a challenge that's going to require a little more creativity... You're going to have to light this fire... with your pee! Can you use your PEE to START A FIRE? You'll know after you see this! If you like survival and fire-...

How To: Build a barrel rocket stove

A rocket stove is a "rocket" combustion approach to preparing meals, which provides high combustion efficiency and efficient heat transfer to the cooking pot. Research suggests (through practical experience) that by using a rocket stove, you could save at least 50% of fuelwood, which is a significant savings for anyone's financial situation.

How To: Teach a dog to play tug of war

Some trainers argue that playing tug of war is not healthy for a dog. It can be a battle of strength between a dog and owner, that the dog might think they control. However, tug of war can be a great way to train a dog a release command that can be useful in day to day situations. Learn how to play tug of war with a dog the right way by watching this video training tutorial.