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McCain's and Obama's Websites: a Website Accessibility and Optimization Case Study

Regardless of the topic, it is important to keep websites accessible to as many people as possible. This especially applies to websites of those running for political offices, as they are the best places to get details on the candidates' platforms. Unfortunately, both Barack Obama's and John McCain's websites are anything but accessible. In this case study, I'll examine a few areas where their web designers went wrong. This article was originally written before the end of the election, but I am keeping it on the site even though the election is now over.

Preventing Malicious User Input in PHP

Although there are many things a security conscious developer must know when writing web applications, there are a few things that are especially important to keep in mind when developing a website which serves dynamic content. In this tutorial, I will show you several of the important security considerations which should be put in place when developing dynamic websites in PHP, though it is by no means all inclusive.

Big-O Notation and Asymptotic Bounds — the Whole Story

You may have learned about big-O notation in your high school or college computer science course, but chances are you weren't told a good deal about asymptotic bounds in general. You see, big-O is just one kind of bound and there are several other kinds which may apply to a function. Also, I have noticed that a further understanding of asymptotic bounds is useful when thinking about limits involving infinity in the study of calculus. In this lesson, I'll discuss the four other types of asymptotic bounds (as well as review big-O).

Cryptographic Functions: a General Overview

Cryptography is in use just about everywhere protecting your online transactions to validating your identity. If you are looking for detailed information on the implementation of popular encryption algorithms such as AES or Serpent, this is the wrong overview, but if you want some general information about the types of cryptographic functions and how they can be combined to do many useful things, this is for you.

Copyright © 2008-2010 John Peebles—Copyright claimed on all content, stylesheets, images, scripts, videos, sound, source code, copyrightable portions of derivative works, and computer programs available on this website, unless otherwise stated. Copyright not claimed on the original, unmodified public domain NASA images. All rights reserved. This site is intended purely for general academic inquiries, and specifics of a situation may render the information presented on it void, or even cause the information to be harmful. There is a good faith attempt to provide accurate information, but I am only one person and am only a college freshman. As I am not familiar with the specifics of whatever your case is and the information is not designed to be applied to specific cases and the information may not be fully accurate, there is no warranty either expressed or implied on the information presented here, so if you decide to actually use the information on this website for something, I assume no liability for any harms which may arise from such use. Links to other websites do not constitute endorsements of the sites, their authors, nor their content, and constitute information for which I assume no liability under the previous part of this disclaimer.