Businesses lose billions of dollars every year due to poorly tested software,
and the body of professional software testers is grossly underpopulated. Now,
Software Testing delivers a thorough treatment of everything a technology
professional needs to become a proficient software tester. The presentation
sequence builds from simple to complex examples, giving novice readers a
foundation for grasping the material. The use of real-world case studies further
enhances understanding, while diagrams, tables, and sample printouts help the
reader to visualize the processes being discussed. Read the rest of this entry »

Unique overview of classical wave theory. Acoustics, optics, electromagnetic
radiation, more. Ideal as classroom text or for self-study. Problems.

This unique one-volume overview of classical wave theory-ideal as a classroom
text or for individual study-covers wave phenomena of acoustics, optics,
electromagnetic radiations and more. Topics include fundamentals, Bessel
functions, waveguides, elasticity theory, hydrodynamic waves, and special
phenomenon of wave diffraction. With problems.

So waves are everywhere. But what makes a wave a wave? What characteristics, properties, or behaviors are shared by all the phenomenon which we typically characterize as being a wave? How can waves be described in a manner that allows us to understand their basic nature and qualities?

A wave can be described as a disturbance that travels through a medium from one location to another location. Consider a slinky wave as an example of a wave. When the slinky is stretched from end to end and is held at rest, it assumes a natural position known as the equilibrium or rest posistion. The coils of the slinky naturally assume this position, spaced equally far apart. To introduce a wave into the slinky, the first particle is displaced or moved from its equilibrium or rest position. The particle might be moved upwards or downwards, forwards or backwards; but once moved, it is returned to its original equilibrium or rest position. The act of moving the first coil of the slinky in a given direction and then returning it to its equilibrium position creates a disturbance in the slinky. We can then observe this disturbance moving through the slinky from one end to the other. If the first coil of the slinky is given a single back-and-forth vibration, then we call the observed motion of the disturbance through the slinky a slinky pulse. A pulse is a single disturbance moving through a medium from one location to another location. However, if the first coil of the slinky is continuously and periodically vibrated in a back-and-forth manner, we would observe a repeating disturbance moving within the slinky which endures over some prolonged period of time. The repeating and periodic disturbance which moves through a medium from one location to another is referred to as a wave.

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Murphy’s law states that anything that can go wrong will go wrong. In
relation to Information Systems and Technology this could mean an
incident that completely destroys data, slows down productivity or
causes any other major interruption of your operations or your business.
How bad can it get?—”Most large companies spend between 2% and 4% of
their IT budget on disaster recovery planning; this is intended to avoid
larger losses. Of companies that had a major loss of computerized data,
43% never reopen, 51% close within two years, and only 6% will survive
long-term.” —Jim Hoffer, Backing Up Business – Industry Trend or Event.

Active Directory (AD) is a great system but it is also very delicate. If
you get a problem, you will need to know how to recover from this
situation. You will need to know about Disaster Recovery and be prepared
with a business continuity plan. If Active Directory is a part of the
backbone of your network and infrastructure, the guide to bring it back
online in case of an incident needs to be as clear and concise as
possible. If all of this happens or if you want to avoid all of this
happening, this is the book for you.

Recovering Active Directory from any kind of disaster is trickier than
most people think. If you do not understand the processes associated
with recovery, you can cause more damage than you fix. This is why you
need this book.

This book has a unique approach—the first half focuses on planning and
shows you how to configure your AD to be resilient; the second half is
response focused and meant as a reference in which we discuss different
disaster scenarios. We follow a Symptom-Cause-Recovery approach—so all
you have to do is follow along and get back on track.

This book describes the most common scenarios and how to properly
recover your infrastructure from them. It contains commands and steps
for each process and contains information on how to plan for disaster
and how to leverage technologies in your favor in case of a disaster.

You will encounter these types of disaster and incident in the book, and
learn how to recover from them:

Deleted objects
Single domain controller hardware failure
Single domain controller AD corruption
Site AD corruption
Site hardware failure
Corporate AD corruption
Complete corporate hardware failure Read the rest of this entry »

Already the industry standard for Python users, Programming
Python from
O’Reilly just got even better. This third edition has been updated to
reflect current best practices and
the abundance of changes introduced by the latest version of the
language, Python 2.5.

Whether you’re a novice or an advanced
practitioner, you’ll find this
refreshed book more than lives up to its reputation. Programming
Python, Third Edition teaches you the right
way to code. It explains Python language syntax and programming
techniques in a clear and concise
manner, with numerous examples that illustrate both correct usage and
common idioms. By reading this
comprehensive guide, you’ll learn how to apply Python in real-world
problem domains such as:

GUI programming

Internet scripting

Parallel processing

Database management

Networked applications

Programming Python, Third Edition covers
each of these
target domains
gradually, beginning with in-depth discussions of core concepts and
then progressing toward complete
programs. Large examples do appear, but only after you’ve learned
enough to understand their techniques and
code.

Along the way, you’ll also learn how to use the Python language in
realistically scaled programs–concepts such as Object Oriented Programming (OOP) and code reuse
are recurring side themes throughout this
text. If you’re interested in Python programming, then this O’Reilly
classic needs to be within arm’s reach. The
wealth of practical advice, snippets of code and patterns of program
design can all be put into use on a
daily basis–making your life easier and more productive.

Reviews of the second edition:

“…about as comprehensive as any book can be.”
–Dr. Dobb’s Journal

“If the language had manuals, they would undoubtedly
be the texts from O’Reilly…’Learning Python’ and ‘Programming Python’
are definitive treatments.”
–SD Times

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Congratulations! The iPhone you just bought is one heck of a wireless telephone, complete with a capable 2-megapixel digital camera. But it’s way more than that: it’s also a gorgeous widescreen video iPod and the smallest, most powerful Internet communications device yet. So now that you’ve got it, what do you do with it? That’s where iPhone For Dummies comes in.

Apple’s iPhone, puts the world virtually in your pocket. But because it does so much, there’s a lot to know about using it! This full-color guide shows you how to find and play music and videos; use the full-featured keyboard; get driving directions and stock quotes; send e-mail; take, browse, and organize photos; work with contacts and appointments — and even talk on the phone. You’ll find out how to:

* Activate your own service
* Master the multitouch interface
* Turn on the speaker phone
* Use Visual Voicemail
* Get video, podcasts, and RSS feeds
* Surf the Web with your iPhone
* Browse your iTunes library and create playlists
* Send and receive text messages and notes
* Choose wallpaper and ringtones
* Troubleshoot problems
* Lock your iPhone and secure your stuff

iPhone For Dummies comes complete with tantalizing lists of awesome accessories, wonderful widgets, and fantastic things to wish for—once you finally stop gushing and drooling and playing with your sparkly, new iPhone long enough to wish for anything else!

From the Back Cover
Play podcasts, music, videos, and photo slideshows

Customize your iPhone, fill it with cool stuff, even use it to manage your life

With Apple’s iPhone, you have the world virtually in your pocket. But because it does so much, there’s much to know about using it! This full-color guide shows you how to keep on top of your appointments, check the local weather, get driving directions and stock quotes, send and receive e-mail and text messages, take photos — even talk on the phone.

* Activate your iPhone
* Sync your data, calendar, e-mail, and media
* Make and receive phone calls
* Find a person, place, or thing with Maps
* Take and organize photos
* Troubleshoot common problems

Read the rest of this entry »