Ruby has set the world on fire, proving itself a serious challenger to Perl and Python in all spheres. In particular, more and more people are discovering that Ruby’s flexibility, superb feature set, and gentle learning curve make it a natural choice for system administration tasks, from the humblest server to the largest enterprise deployment.

Within the pages of Practical Ruby for System Administration, you’ll learn the Ruby way to construct files, tap into clouds of data, build domain-specific languages, perform network traffic analysis, and more.

Based on author André Ben Hamou’s own experiences working as a system administrator, this book will help you pick up practical tips on Ruby coding style, learn how to analyze and improve script performance, and make use of no-nonsense advice on scripting workflow, including testing and documentation.

Above all, you’ll come to appreciate the sheer power of Ruby and the hundreds of benefits it offers for system administration.
This book places equal emphasis on fundamental Ruby concepts as well as practical how-tos.
It uses examples from other languages to ease the transition to Ruby.
The book is concise, entertaining, and informative–unlike many books aimed at system administrators, which can be overly long and stodgy.

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Practical Rails Social Networking Sites shows you the complete development cycle of a social networking community web site. The project develops first as a simple content management system, after which author Alan Bradburne progressively adds features in order to build a full Web 2.0–enabled community-based social networking site using Ruby on Rails.

You will learn how to make the best use of the Ruby on Rails framework within a large project and how to implement and adapt features specific to a community. The book offers practical advice and tips for developing and testing, along with guidance on how to take your site live, as well as optimize and maintain it.

The book also explores how to integrate with other community sites such as Flickr and Google Maps, and how to make good use of Rails’ Ajax features. You will also learn how to optimize and adapt your site to work well on mobile browsers.

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‘Elements of Quantum Information’ introduces the reader to the fascinating field of quantum information processing, which lives on the interface between computer science, physics, mathematics, and engineering. This interdisciplinary branch of science thrives on the use of quantum mechanics as a resource for high potential modern applications. With its wide coverage of experiments, applications, and specialized topics - all written by renowned experts - ‘Elements of Quantum Information’ provides an indispensable up-to-date account of the state of the art of this rapidly advancing field and takes the reader straight up to the frontiers of current research. The articles have first appeared as a special issue of the journal ‘Fortschritte der Physik/Progress of Physics’. Since then, they have been carefully updated. The book will be an inspiring source of information and insight for anyone researching and specializing in experiments and theory of quantum information.

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This new and completely updated edition features not only an accompanying CD-ROM, but also a new applications section, reflecting the many breakthroughs in the field over the last few years. It provides a complete set of computational models that describe the physical phenomena associated with scanning tunneling microscopy, atomic force microscopy, and related technologies.

The result is both a solid professional reference and an advanced-level text, beginning with the basics and moving on to the latest techniques, experiments, and theory. In the section devoted to atomic force microscopy, the author describes the mechanical properties of cantilevers, atomic force microscope tip-sample interactions, and cantilever vibration characteristics. This is followed by an in-depth treatment of theoretical and practical aspects of tunneling phenomena, including metal-insulator-metal tunneling and Fowler-Nordheim field emission. The final section features applications, dealing with, among others, Kelvin and Raman probe microscopy.

The self-contained presentation spares researchers valuable time spent hunting through the technical literature for the theoretical results required to understand the models presented. The Mathematica code for all the examples is included in the CD-ROM, affording the freedom to change the values and parameters of specific problems as desired, or even modify the programs themselves to suit various modeling needs.

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High dynamic range imaging produces images with a much greater range of light and color than conventional imaging. The effect is stunning, as great as the difference between black-and-white and color television. High Dynamic Range Imaging is the first book to describe this exciting new field that is transforming the media and entertainment industries. Written by the foremost researchers in HDRI, it will explain and define this new technology for anyone who works with images, whether it is for computer graphics, film, video, photography, or lighting design.

* Written by the leading researchers in HDRI
* Covers all the areas of high dynamic range imaging including capture devices, display devices, file formats, dynamic range reduction, and image-based lighting
* Includes a DVD with over 4 GB of HDR images as well as source code and binaries for numerous tone reproduction operators for Windows, Linux, and Mac OS X

Audience
Researchers and developers in computer graphics and the entertainment industry; technical directors in film and photography; anyone who works with images.

Contents

Foreword Preface
1 Introduction
2 Light And Color
2.1 Radiometry 2.2 Photometry 2.3 Colorimetry 2.4 Color Spaces 2.5 White Point and Illuminants 2.6 Color Correction 2.7 Color Opponent Spaces 2.8 Color Appearance 2.9 Display Gamma 2.10 Brightness Encoding 2.11 Standard RGB Color Spaces
3 HDR Image Encodings
3.1 LDR versus HDR Encodings 3.2 Applications of HDR Images 3.3 HDR Image Formats 3.4 HDR Encoding Comparison 3.5 Conclusions
4 HDR Image Capture
4.1 Photography and Light Measurement 4.2 HDR Image Capture from Multiple Exposures 4.3 Film Scanning 4.4 Image Registration and Alignment 4.5 The Mean Threshold Bitmap Alignment Technique 4.6 Deriving the Camera Response Function 4.7 Ghost Removal 4.8 Lens Flare Removal 4.9 Direct Capture of HDR Imagery 4.10 Conclusions
5 Display Devices
5.1 Hardcopy Devices 5.2 Softcopy Devices
6 The Human Visual System and HDR Tone Mapping
6.1 Tone-mapping Problem 6.2 Human Visual Adaptation 6.3 Visual Adaptation Models for HDR Tone Mapping 6.4 Background Intensity in Complex Images 6.5 Dynamics of Visual Adaptation 6.6 Summary
7 Spatial Tone Reproduction
7.1 Preliminaries 7.2 Global Operators 7.3 Local Operators 7.4 Summary
8 Frequency Domain And Gradient Domain Tone Reproduction
8.1 Frequency Domain Operators 8.2 Gradient Domain Operators 8.3 Performance 8.4 Discussion
9 Image-Based Lighting
9.1 Introduction 9.2 Basic Image-based Lighting 9.3 Capturing Light Probe Images 9.4 Omnidirectional Image Mappings 9.5 How a Global Illumination Renderer Computes IBL Images 9.6 Sampling Incident Illumination Efficiently 9.7 Simulating Shadows and Scene-Object Interreflection 9.8 Useful IBL Approximations 9.9 Image-based Lighting for Real Objects and People 9.10 Conclusions
List of Symbols References Index

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This bestselling book is now the standard guide to building phone systems with Asterisk, the open source IP PBX that has traditional telephony providers running scared! Revised for the 1.4 release of the software, the new edition of Asterisk: The Future of Telephony reveals how you can save money on equipment and support, and finally be in control of your telephone system.

If you’ve worked with telephony in the past, you’re familiar with the problem: expensive and inflexible systems that are tuned to the vendor’s needs, not yours. Asterisk isn’t just a candle in the darkness, it’s a whole fireworks show. Because Asterisk is so powerful, configuring it can seem tricky and difficult. This book steps you through the process of installing, configuring, and integrating Asterisk with your existing phone system.

You’ll learn how to write dialplans, set up applications including speech synthesis and voice recognition, how to script Asterisk, and much more � everything you need to design a simple but complete system with little or no Asterisk experience, and no more than rudimentary telecommunications knowledge. The book includes:
A new chapter on managing/administering your Asterisk system
A new chapter on using Asterisk with databases
Coverage of features in Asterisk 1.4
A new appendix on dialplan functions
A simplified installation chapter
New simplified SIP configuration, including examples for several popular SIP clients (soft phones and IP telephones)
Revised chapters and appendicies reviewed and updated for the latest in features, applications, trends and best-practices

Asterisk is revolutionizing the telecom industry, due in large part to the way it gets along with other network applications. While other PBXs are fighting their inevitable absorption into the network, Asterisk embraces it. If you need to take control of your telephony systems, move to Asterisk and see what the future of telecommunications

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In Home and Small Office Networking, you’ll learn everything you need to assemble your network, as well as what you can do once it’s up and running. Jeff Van West and Garrick Chow begin the tutorial by explaining what a network is and why you might want to create one. Then they take you through the step-by-step process of installing hardware, plugging in cables, and configuring software. This tutorial covers both Windows and Macintosh networking issues, as well as how to get the two platforms to communicate with each other.

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This revised edition of the classic Core Java™, Volume I–Fundamentals, is the definitive guide to Java for serious programmers who want to put Java to work on real projects.

Fully updated for the new Java SE 6 platform, this no-nonsense tutorial and reliable reference illuminates the most important language and library features with thoroughly tested real-world examples. The example programs have been carefully crafted to be easy to understand as well as useful in practice, so you can rely on them as an outstanding starting point for your own code.

Volume I is designed to quickly bring you up to speed on what’s new in Java SE 6 and to help you make the transition as efficiently as possible, whether you’re upgrading from an earlier version of Java or migrating from another language. The authors concentrate on the fundamental concepts of the Java language, along with the basics of user-interface programming. You’ll find detailed, insightful coverage of
Java fundamentals
Object-oriented programming
Interfaces and inner classes
Reflection and proxies
The event listener model
GUI programming with Swing
Packaging applications
Exception handling
Logging and debugging
Generic programming
The collections framework
Concurrency

For detailed coverage of XML processing, networking, databases, internationalization, security, advanced AWT/Swing, and other advanced features, look for the forthcoming eighth edition of Core Java™, Volume II�Advanced Features (ISBN: 978-0-13-235479-0).

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The World’s Bestselling AutoCAD Resource Fully Updated for 2008
There’s a reason why Mastering AutoCAD is so popular year after year. Loaded with concise explanations, step-by-step instructions, and hands-on projects, this comprehensive reference and tutorial from award-winning author George Omura has everything you need to become an AutoCAD expert.

If you’re new to AutoCAD, the tutorials will help you build your skills right away. If you’re an AutoCAD veteran, Omura’s in-depth explanations of the latest and most advanced features, including the exciting annotation, notes, and layer properties features, will turn you into an AutoCAD pro. Whatever your experience level and however you use AutoCAD, you’ll refer to this indispensable reference again and again.

Coverage includes:

* Creating and developing AutoCAD drawings
*

Drawing curves and applying solid fills
*

Effectively using hatches, fields, and tables
*

Manipulating dynamic blocks and attributes
*

Linking drawings to databases and spreadsheets
*

Rendering realistic interior views with natural lighting
*

Giving a hand-drawn look to 3D views
*

Presenting 3D models with cutaway and x-ray views
*

Making spiral forms with the Helix and Sweep tools
*

Exploring your model in real time with the Walk and Fly tools
*

Adding hyperlinks to drawings
*

Converting multiple layer settings and other layer translator options

Master the New Text and Table Features

Explore the Layer Manager Enhancements

Annotate, Secure, and Authenticate Files

Track Your Projects with the Sheet Set Manager

Publish Drawings over the Internet and eTransmit Your Files

Customize the New Dashboard and Control Panel

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The art, craft, discipline, logic, practice and science of developing large-scale software products needs a professional base. The textbooks in this three-volume set combine informal, engineeringly sound approaches with the rigor of formal, mathematics-based approaches.

This volume covers the basic principles and techniques of specifying systems and languages. It deals with modelling the semiotics (pragmatics, semantics and syntax of systems and languages), modelling spatial and simple temporal phenomena, and such specialized topics as modularity (incl. UML class diagrams), Petri nets, live sequence charts, statecharts, and temporal logics, including the duration calculus. Finally, the book presents techniques for interpreter and compiler development of functional, imperative, modular and parallel programming languages.

This book is targeted at late undergraduate to early graduate university students, and researchers of programming methodologies. Vol. 1 of this series is a prerequisite text.

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A guide to attracting, recruiting, interviewing, and hiring the best technical talent.
A comprehensive system for hiring top-notch technical employees
Packed with useful information and specific advice written in a breezy, humorous style
Learn how to find great people–and get them to work for you–in an afternoon!

The top software developers are ten times as productive as average developers. Ten times. You can’t afford not to hire them. But if you haven’t been reading Joel Spolsky’s books or blog, you probably don’t know how to find them and make them want to work for you.

In this brief book, Joel reveals all his secrets–from his years at Microsoft, and as the co-founder of Fog Creek Software–for recruiting the best developers in the world. You’ll learn:
How to create a pipeline of excellent developers using internships–and why this is not optional
How to build a workplace where the best programmers want to work
The secrets to reading resumes, interviewing technical people, and deciding when to make an offer

If you’ve ever wondered what you should be looking for in a resume, if you’ve ever struggled to decide whether to hire someone at the end of an interview, or if you’re wondering why you can’t find great programmers, stop everything and read this book.

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Our world and our society are shaped and increasingly governed by software. Since software is so ubiquitous and embedded in nearly everything we are doing, we need to stay in control. We have to make sure that the systems and their software are running as we intend - or better. Software measurement is the discipline that assures that we stay in control.

In this volume, Ebert and Dumke provide a comprehensive introduction to software measurement. They detail knowledge and experiences about software measurement in an easily understood, hands-on presentation. Brief references are embedded from world-renown experts such as Alain Abran, Luigi Buglione, Manfred Bundschuh, David N. Card, Ton Dekkers, Robert L. Glass, David A. Gustafson, Marek Leszak, Peter Liggesmeyer, Andreas Schmietendorf, Harry Sneed, Charles Symons, Ruediger Zarnekow and Horst Zuse. Many examples and case studies are provided from Global 100 companies such as Alcatel-Lucent, Atos Origin, Axa, Bosch, Deloitte, Deutsche Telekom, Shell, Siemens and Vector Consulting.

This combination of methodologies and applications makes the book ideally suited for both professionals in the software industry and for scientists looking for benchmarks and experiences. Besides the many practical hints and checklists readers will also appreciate the large reference list, which includes links to metrics communities where project experiences are shared. Further information, continuously updated, can also be found on the Web site related to this book: http://metrics.cs.uni-magdeburg.de/

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