Need to calculate the domain and range of a function in algebra? Learn how with this free video lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, ...more
Your childhood "social networking" may have been to go outdoors to the neighbor's — and outdoors is a great place for kids to be. But these days, the terms educational, digital media, entertainment, and toddlers don't have to be mutually exclusive. Like most things in life, it ...more
Welcome back, my rookie hackers! For some time now, I have been contemplating this issue, can we hack back the hackers? As someone who plays on both sides of the cyber security ping pong match, I've wondered whether I can use my hacking skills in self-defense of my clients. A ...more
See how to find the domain and range of a function implied by a word problem with this free video math lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the In ...more
It was brought up a while back in a Community Call to Arms that *math* is handy for encryption (and let's face it, everything) so let us go over things you just have to know. "In its simplest meaning in mathematics and logic, an operation is an action or procedure which produc ...more
The developer community has already made some incredibly quick progress on implementing assemblers, interpreters, and emulators for the proposed virtual computer in 0x10c, Notch's latest game. But the truth is that the majority of programmers out there couldn't be bothered wit ...more
Warnings i cant be held responsible for any illegal act done by anyone but myself and there are copyrights so notise that taken the trademarks or copyrights are strigtly prohibeted by law and will be punshied by law and i or my partners cant be held responsible for sudo camma ...more
To create an elegant WordPress blog or website from scratch without being noticed that you're a complete beginner, you need that drive and pairs of eyes and ears. It may seem difficult at first but it can truly be fun and exciting. In order for you to have a long lasting blog ...more
If you're a teacher in any type of school, whether it's high school, college, or middle school, it's imperative that you keep an attendance sheet. The paper and pen route can get pretty messy, and very disorganized, and that's where Microsoft Excel comes in. With this software ...more
In the first part of this series, we took a factual and technical look at the history of the Internet. I explained how all of these wires and servers got here in the first place. Obviously, a firm did not just create and build the Internet around 1995! Now that we know how the ...more
In 2013, Offensive Security released Kali Linux, a rebuild of BackTrack Linux derived from Debian. Since then, Kali has gone on to become somewhat of a standard for penetration testing. It comes preconfigured with a collection of tools accessible by a menu system, tied togethe ...more
When it comes to attacking devices on a network, you can't hit what you can't see. Nmap gives you the ability to explore any devices connected to a network, finding information like the operating system a device is running and which applications are listening on open ports. Th ...more
If we were to assign a theme for the 2019 edition of the Next Reality 30 (NR30), it might be something along the lines of, "What have you done for me lately?" Many of the top names in the industry from the 2018 edition remain the same, but their positions have shuffled. The p ...more
Using a strong password is critical to the security of your online accounts. However, according to Dashlane, US users hold an average of 130 different accounts. Memorizing strong passwords for that many accounts is impractical. Fortunately, password managers solve the problem. ...more
NetBIOS is a service that allows for communication over a network and is often used to join a domain and legacy applications. It is an older technology but still used in some environments today. Since it is an unsecured protocol, it can often be a good starting point when atta ...more
All fields of study have their own language. For people interested in learning about microbes, the language can sometimes be downright difficult — but it doesn't need to be. From antibiotics to xerophiles, we have you covered in an easy-to-understand glossary. Terms are liste ...more
Why did I write this when they're tons of scanning tools available. Let's start with a real world situation. I sometimes visit clients sites that I need to obtain a usable IP address for a server or whatever. Believe it or not, they are networks that are configured with class ...more
NOTICE: Ciuffy will be answering questions related to my articles on my behalf as I am very busy. Hope You Have Fun !!! Hello Guys, Welcome to my tutorial and in this tutorial, We are basically going to create a python script that serves as a proxy server ( Without External ...more
NOTICE: Ciuffy will be answering questions related to my articles on my behalf as I am very busy. Hope You Have Fun !!! Hello Guys, Welcome to my first tutorial and in this tutorial we are basically going to create a port scanner in python ( I guess without external librarie ...more
Want to find the domain of a function without graphing it? Learn how with this free video lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's ...more
Looking for a primer on how to find and sketch the domain of a function z = f(x, y) in calculus? Learn how with this free video calc lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to auto ...more
Looking for a primer on how to find the domain of a function in precalculus? Learn how with this free video precalc lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, tha ...more
Need to calculate the domain and range of a graphed piecewise function? Learn how with this free video lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the In ...more
New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 678th installment in their series of digital spreadsheet magic tricks, you'll learn how to SUM onl ...more
Take a look at this instructional video and learn how to use simple formulas in Microsoft Office Excel 2007 to add, subtract, multiply, and divide. For example, you can use a prewritten formula called the SUM function to find totals, such as your total monthly expenses. Excel ...more
ExcelIsFun will show you how to use indirect text and substitute in Excel. Select any date and product and create an intersession. Use Vlookup to look up your columns. Use the match function to find the value range. To do the same thing with dates, highlight the dates and name ...more
In this tutorial, we learn how to determine if you have a function. You will start off with two functions and their points. The 'x' values make up the domain of the function and the 'y' values make up the range. The input values are the domain and the output are the range. If ...more
If you use Microsoft Excel on a regular basis, odds are you work with numbers. Put those numbers to work. Statistical analysis allows you to find patterns, trends and probabilities within your data. In this MS Excel tutorial from everyone's favorite Excel guru, YouTube's Excel ...more
In this video the teacher shows us how to use a TI-84 plus graphing calculator to graph a function, adjust the view window, and determine the values of several types of critical points on the graph such as x-intercept, y-intercept, local maximums, and local minimums. After ent ...more
Mirror, mirror on the wall, who is the fairest of them all? Besides being one of the most notorious misquotes of all time (the line is "Magic Mirror on the wall, who is the fairest of them all"), it's a question that men and women probably have asked themselves more than once. ...more
Welcome back, my hacker noviates! In a recent post, I introduced you to Shodan, the world's most dangerous search engine. Shodan crawls the globe from IP to IP address, attempting to pull the banners of each web-enabled device and server it finds. These banners are what the ...more
Getting used to your new Firefox 4 web browser? If so, you might have seen some improvements in the Location Bar. The updated features make browsing the web a cinch, so it's no wonder why more and more Internet junkies are calling it the Awesome Bar. It's faster and easier to ...more
New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 664th installment in their series of digital spreadsheet magic tricks, you'll learn how about how ...more
If you use Microsoft Excel on a regular basis, odds are you work with numbers. Put those numbers to work. Statistical analysis allows you to find patterns, trends and probabilities within your data. In this MS Excel tutorial from everyone's favorite Excel guru, YouTube's Excel ...more
There is a new function in MS Excel 2010 called ‘Sparkline’ which helps you quickly find trends associated with a set of data. To create Sparkline, you can go to ‘Insert’ tab and then select ‘Sparkline’ section and then select the graph type. After you enter the data range and ...more
So, you scratched up your $500 Adobe CD and now it's unreadable. You could go buy a new one, but you already purchased it! Searching The Pirate Bay and downloading some Adobe software can usually be easy enough, but what should you watch out for? And what about your movies? W ...more
Wireless networks. Nowadays, everyone uses 'em, but most don't secure 'em. On average, I can drive up and down any block in my city and find at least one or two open or semi-open networks on any given day. With some changed MAC addresses for good measure, an attacker can use y ...more
You've probably seen those deep-web images floating around on the Internet. Usually, it goes something like this: There is a towering iceberg and the deeper the underwater portion extends, the more “hidden” and “exotic” the content is described to be. Sometimes these images ar ...more
Welcome to Microwave Energy—the next part of my Making Electromagnetic Weapons series. For the Electromagnetic Pulse Generator, check out the last three articles (One, Two and Three). I'm sure almost all of you have used a microwave at some point in your lives. As a child, I ...more
Bash (Shell) Scripting for Beginners Intro I am an occasional Linux user currently playing around in CrunchBang and loving it. Prior to this, I used to dual-boot Windows and xfce-buntu (or xubuntu) at work, and due to some unforeseen circumstances, my screen always went fuzz ...more
Use the Excel Vlookup function in Microsoft Excel 2007 to look up data in a table. This tutorial looks up the level and value of a product from a stock list using the Vlookup function in Excel. To use the Vlookup function in Excel 2007: 1. Click on the Formulas tab on the ri ...more
Color Correction: Put Your Best Foot Forward via Hurlbut Visuals My first experience with the 5D DI color correction was for the Terminator Webisodes produced by the Bandito Brothers through Wonderland Sound and Vision. McG asked me to be the Director/Cameraman for these al ...more
The idea of finding the area under a curve is an important fundamental concept in calculus. Consider a function y = f(x). Now the area under the curve is to be calculated. The area under a curve problem is stated as 'Let f(x) be non negative on [a, b]. Find the area of the reg ...more
In this video, Mr. Maisonet provides a quick and easy method for calculating the area of a trapezoid. In the first step, The lengths of the two bases (the two sides of a trapezoid that are parallel to one another) are averaged. The lengths of the bases are first added together ...more
This video shows the method to write a logarithm as a sum or difference of logarithms. The square root of the term given is taken out as half according to the rule. Then the numerator and denominator is divided into product of factors. This is broken into the difference of num ...more
Professor ElvisZap teaches you how to stretch shift and reflect the graph of a square root. A square root function is the opposite of a squared function. You start with y=square root of (x-1) it becomes 0<=x-1. then 1 <=x. You use the graph and solve it as you would for any fu ...more
This video shows how to find the formula of a piecewise function when given a graph. The first step is to write a definition for the graph, which is done by identifying the different domains shown in the graph. The second step is writing formulas for each domain specified by t ...more
This video shows the method to find the variance and standard deviation using Excel. The variance shows the variability of the data points from the median. We find the difference of the median and the mean. We write the formula using '=' sign. The median and data points are pu ...more
In this educational video the instructor shows how to find the slant asymptotes of rational functions. Slant or oblique asymptotes occur when the degree of the numerator is exactly one greater than the degree of the denominator of the rational function. The way to find the equ ...more
1. The following instruction describes how to generate sub totals in Microsoft Excel Sheet. 2. Take Region as a Primary column and Sales Rep as a Secondary Column. 3. First method to sort: Select a cell in Region and goto Data select A to Z. 4. Second method to sort: Select a ...more
With the Kodak Zi8, the power to capture razor-sharp, full 1080p HD video fits in the palm of your hand. Its easy, one-touch operation and incredible versatility make it the perfect camera for beginners, experts, and everyone in between. Step 1: Get started Get started in a s ...more
It doesn’t matter how long ago your last geometry class was, you can still impress your friends by finding a geometric mean. The geometric mean can be used to find the average of numbers with out unusually high or low results effecting the result. The geometric mean of two nu ...more
On your iCloud Mail account, you can easily use subaddressing to create hundreds of new iCloud email addresses to give to companies and other parties, all of which go straight to your primary iCloud email address's inbox. The problem with these types of alternative email addre ...more
When you encounter a mysterious laundry care symbol or alarming vehicle indicator light, you might just ignore it rather than ask somebody, search online, or open a user manual for the answer. If you have an iPhone, there's an easier way to decipher the meanings behind perplex ...more
Safari isn't the only web browser on your iPhone or iPad that will let you add icons to your Home Screen for progressive web apps and website bookmarks. Apple gave developers the key to its "Add to Home Screen" feature, and your favorite iOS or iPadOS web browser may already s ...more
When you want a helpful task manager on your iPhone or iPad, any of the nine apps in this guide should be at the top of your list. But we'll review each app's features to help you determine which one might be best for your workflow. Using a task manager on your iPhone or iPad ...more
Apple AirTags are super helpful for keeping track of your keys, backpack, and other frequently misplaced items, but there are some pretty clever things you can do with them beyond finding your stuff. Apple's $29 Bluetooth beacons definitely drew some inspiration from Tile's l ...more
There are many things Apple doesn't tell you about its products, and that's definitely the case when it comes to its Messages app. Hidden features lurk in your SMS and iMessage conversations just waiting to be found, and we've unearthed some of the most secret ones. Instead o ...more
When setting up your home office or giving it a makeover, the desk is the key to making the room a functional workspace. And if you're in there all day, it also has a significant impact on your health. Standing desks can help offset some of the adverse health risks associated ...more
Apple's new iOS 16 software update is finally here, and there are over 350 new features and changes for you to enjoy on your iPhone. There are major lock screen and home screen improvements, a pleasant surprise for the Contacts app, and tons of new upgrades to Safari, Mail, Me ...more