Cost Function Search Results

How To: Create a Tangent Line with Excel

Given a function, you can easily find the slope of a tangent line using Microsoft Excel to do the dirty work. That is to say, you can input your x-value, create a couple of formulas, and have Excel calculate the secant value of the tangent slope. This is a fantastic tool for Stewart Calculus sections 2.1 and 2.2.

How To: Throw a cheap block party for the neighborhood

Throwing a block party is a great way to meet your neighbours! Block parties are perfect for hot summer nights when no one wants to be stuck indoors. These parties are fun and easy to throw, even on a budget. Check out this video for information on how to throw a rockin' party for your neighborhood without spending much money.

SQL Injection 101: Advanced Techniques for Maximum Exploitation

For SQL injection, the next step after performing reconnaissance and gathering information about a database is launching an attack. But something seems off .. in the real world, it's usually not quite as simple as passing in a few fragments of SQL code to an input field and seeing all that glorious data displayed right in the browser. This is when more advanced techniques are needed.

News: The Best Black Friday 2017 Deals on Portable Chargers for Your Smartphone

With the holidays fast approaching, our smartphones are more important than ever — keeping in constant contact with family, organizing trips and gatherings, and online shopping is only a taste of what we put our smartphones through. All of that means a big strain on your smartphone's battery. That's why portable chargers are so necessary, and what better time to pick one up than on Black Friday.

News: Microsoft Introduced Acer's New Windows Mixed Reality Development Edition Headset

This morning, in an early morning session at GDC 2017, Brandon Bray, a senior program manager lead at Microsoft, revealed a mixed reality headset made in collaboration with Acer—a different headset than the one we saw from Acer at CES 2017 earlier this year. Also at the event, the name for Microsoft's holographic system seems to have changed from Windows Holographic to Windows Mixed Reality.

News: Will the HoloLens Forget About Gaming?

Microsoft's HoloLens has many applications in the business world, both large and small, but what about gaming? Initial demos gave the impression that we could expect amazing first person shooters, platformers, and even Minecraft. Yet, as Newsweek noticed, the HoloLens was nowhere to be found at E3 this year.

How To: Build a Directory Brute Forcing Tool in Python

While attempting to hack a web app, there may come a point where the attacker may have to escape the default directory in order to access unauthorized files. This is known as a directory traversal attack. Much as the name implies, this attack involved traversing the servers directories. But in order to move to an unauthorized directory, we need to know where those directories are. Today we'll be building a tool to brute force these directory locations based on HTTP response codes. Before we g...

DIY Elsa Costumes: Icy Halloween Looks for Frozen's Snow Queen

When I was young, I wanted nothing more but to be able to freeze things just like one of my favorite X-Men characters, Iceman. Now, Disney's most successful animated film to date, Frozen, brought another icy childhood favorite to the scene—The Snow Queen. And with Halloween right around the corner, all of the princesses out there can get their chance at being ice royalty. While Princess Anna and Olaf the Snowman were the biggest characters in Frozen, Elsa is one of the movie's most memorable ...

Be Maleficent for Halloween: DIY Horns, Dress & Makeup for Cheap

Casting Angelina Jolie as Maleficent was a no-brainer on Disney's part. No one else could project beauty, elegance, and fear simultaneously just like the animated villain in Sleeping Beauty did. But what sets the character apart from other evil witches, or any other Disney character for that matter, is the sinister, yet gorgeous-looking horns and headdress. And with news that a Maleficent sequel is currently in the works, this will surely be a great Halloween costume this year.

How To: Replace Your Galaxy S5 Screen

The Samsung Galaxy S5 display can be replaced by most do-it-yourselfers with some basic mechanical skills and a few inexpensive tools. The good news is that once you replace your display assembly your screen will be good as new with no bubbles or dust on the inside. The replacement part is a bit pricey but that is a good percentage of the cost involved with manufacturing this device. Below is a video showing the entire process from start to finish. It's best to turn on your volume for the nar...