In test driven development, you first write an executable test of what your application code must do. Only then do you write the code itself and, with the test spurring you on, you improve your design. In acceptance test driven development (ATDD), you use the same technique to implement product features, benefiting from iterative development,...

• Centralize user accounts in openLDAP and understand how Directory can be at the back-end of many services
• Learning Puppet to centralize server configuration will...

Testing has always been a part of software development. For decades, comprehensive testing was defined by complex manual test procedures backed by big budgets; but something revolutionary happened in 1998. In his Guide to Better Smalltalk, Smalltalk guru Kent Beck introduced an automated test framework called SUnit. This triggered an...

This book discusses six major principles of relevance to environmental issues and uses them to evaluate a set of environmental policies. The principles chosen include three that are specific to environmental matters – ecological sustainability, the polluter pays principle and the precautionary principle – and three more that have...

Improving the performance of the power amplifier is the most pressing problem facing designers of modern radio-frequency (RF) transceivers. Linearity and power efficiency of the transmit path are of utmost importance, and the power amplifier has proven to be the bottleneck for both. High linearity enables transmission at the highest data...