I am very pleased to have this new book in the Aho/Ullman series Principles of Computer Science. I see this book as a major step toward making computer science theory accessible to the wide range of students who need to know the subject. It covers a good segment of the classical material on data structures and algorithms, but it does so in a...

Almost without realizing it, we have shifted toward an all-digital culture. Future heirlooms like family photos, home movies, and personal letters now exist only in digital form, and in many cases they are stored using popular services like Flickr, YouTube, and Gmail. These digital possessions form a rich collection that chronicles our lives...

Natural Language Processing is used everywhere - in search engines, spell checkers, mobile phones, computer games - even your washing machine. Python's Natural Language Toolkit (NTLK) suite of libraries has rapidly emerged as one of the most efficient tools for Natural Language Processing. You want to employ nothing less than the best...

On November 4, 2009, Alberto and I had dinner with many other Analysis Services experts from all around the world, including many people from the Microsoft development team. We were in Seattle for the PASS Summit 2009, a conference for SQL Server professionals, and because Redmond, Washington is very near to Seattle, events like this often...

Google Voice is a service that lets you manage all your phone numbers through a single, Internet-connected phone number. Google Voice is free, although you still have to pay for your regular phone services. Users select a free phone number and then use that number to manage all their phones. Sams Teach Yourself Google...

Now that you’ve come up with a great idea for a game, what do you do? We hope that this book will help you answer that question. Game design is a challenging task because it requires the understanding of art, programming, audio/sound, and business.And, even with all those bases covered, you need to be able to put it all down on paper in...

Computer simulation was first pioneered as a scientific tool in meteorology and nuclear physics in the period following World War II, but it has grown rapidly to become indispensible in a wide variety of scientific disciplines, including astrophysics, high-energy physics, climate science, engineering, ecology, and economics. Digital computer...

As a beginning graduate student, I recall being frustrated by a general lack of accessible sources from which I could learn about (theoretical) cryptography. I remember wondering: why aren’t there more books presenting the basics of cryptography at an introductory level? Jumping ahead almost a decade later, as a faculty member my...

We make images to communicate. The ultimate measure of the quality of our images is how well they communicate information and ideas from the creator’s mind to the perceiver’s mind. The efficiency of this communication, and the quality of our image, depends on both what we want to say and to whom we intend to say it. I believe that...

Pro PHP Application Performance will help you understand all the technologies and components which play a role in how well your applications run. When seconds can mean the difference between retaining a user and losing a user, it's important for all of us to have optimization as part of our project roadmap. But what components within your...