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Fast Array Operations with NumPy

by Gabriele Lanaro | December 2013 | Open Source

NumPy is the de facto standard for scientific computing in Python. It extends Python with a flexible multidimensional array that allows fast mathematical calculations.

NumPy works as a framework that allows coding complex operations using a concise syntax. The multidimensional array (numpy.ndarray) is internally based on C arrays: in this way the developer can easily interface NumPy with existing C and FORTRAN code. NumPy constitutes a bridge between Python and the legacy code written using those languages.

In this article, by Gabriele Lanaro, author of Python High Performance Programming, we will learn how to create and access NumPy arrays.

In the last few years a number of packages were developed to further increase the speed of NumPy. We will explore one of these packages, numexpr, that optimizes array expressions and takes advantage of multi-core architectures.

Read Fast Array Operations with NumPy in full

Going Isometric

by Juwal Bose | December 2013 | Games Open Source

This article by Juwal Bose, author of the book Starling Game Development Essentials, helps you to understand the isometric projection and details the relationship between the Cartesian and isometric coordinates.

The topics covered in this article are as follows:

  • Cartesian to isometric equations
  • An isometric view via a matrix transformation
  • Implementing the isometric view via isometric art
  • Level data structure
  • Altering registration points
  • Depth sorting
  • Understanding isometric movement
  • Detecting isometric collision
Read Going Isometric in full

Platform as a Service and CloudBees

by Nicolas De loof | December 2013 | Open Source

In this article by Nicolas De loof, author of Cloud Development and Deployment with CloudBees, introduces the concept of Platform as a Service (PaaS) and why this is the best place for a developer to start using Cloud services. We will also introduce CloudBees high-level vision of PaaS.

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Applied Modeling

by Paul te Braak | December 2013 | Cookbooks Enterprise Articles

This article written by Paul te Braak, the author of the book Microsoft Tabular Modeling Cookbook, focuses on the complex modeling concepts such as:

  • Grouping by binning and sorting with ranks
  • Defining many-to-many relationships
  • Using the last non-empty function for stock data
Read Applied Modeling in full

Hello OpenCL

by Koushik Bhattacharyya Ravishankar Somasundaram | December 2013 | Open Source

In this article by Ravishekhar Banger and Koushik Bhattacharyya, authors of the book OpenCL Programming by Example, we will learn the basic concepts of OpenCL. Parallel Computing has been extensively researched over the past few decades and had been the key research interest at many universities. Parallel Computing uses multiple processors or computers working together on a common algorithm or task. Due to the constraints in the available memory, performance of a single computing unit, and also the need to complete a task quickly, various parallel computing frameworks have been defined. All computers are parallel these days, even your handheld mobiles are multicore platforms and each of these parallel computers uses a parallel computing framework of their choice. Let's define Parallel Computing.

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Settings goals

by Bhanu Birani | December 2013 | Enterprise Articles

This article by Bhanu Birani, author of Getting Started with Flurry Analytics, covers tracking an application and its specific sections as goals to generate detailed reports using Flurry. As your goals will vary depending on your requirements for the data you want to gather from your application. So Flurry provides you with a way to track all your events using your event ID.

Read Settings goals in full

Code Editing

by Dan Peleg | December 2013 | Open Source

In this Article by Dan Peleg, the author of the book Mastering Sublime Text, explains Sublime's basic features to the most advanced features and techniques that need to be used while editing code.

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Working with AMQP

by Gabriele Santomaggio Sigismondo Boschi | December 2013 | Cookbooks Open Source

The article by Sigismondo Boschi and Gabriele Santomaggio, the authors of RabbitMQ Cookbook, introduces the basic concepts of AMQP, the Advanced Message Queuing Protocol, on which RabbitMQ is based. It shows how the fire-and-forget messaging model works and how to use it from clients.

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Enabling your new theme in Magento

by Richard Carter | December 2013 | e-Commerce Open Source Web Development

This article by Richard Carter, the author of Magento Responsive Theme Design, has discussed how to enable a responsive Magento theme for your store. Magento is an open source e-commerce solution. It comes with a variety of tools that are necessary for building a successful online shop.

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Understanding View storage-related features

by Jason Ventresco | December 2013 | Architecture & Analysis Enterprise Articles

In this article by Jason Ventresco, the author of the book VMware Horizon View 5.3 Design Patterns and Best Practices, has explained the storage-related features of View.

View includes two specific features that influence storage design and View infrastructure. One is View Storage Accelerator and the other is tiered storage for View linked clone desktops. This article will go into further detail about each of these features.

Read Understanding View storage-related features in full

Getting Started with Apache Nutch

by Abdulbasit Shaikh Dale Cruse Dr. Zakir Laliwala | December 2013 | Open Source Web Development

In this article by Abdulbasit Shaikh and Zakir Laliwala, the authors of Web Crawling and Data Mining with Apache Nutch, we will cover:

  • Introduction of Apache Nutch
  • Apache Solr Installation
  • Apache Hadoop
  • Use of Apache Gora
  • Integration of Apache Nutch with Apache Accumulo
  • Integration of Apache Nutch with MySQL
Read Getting Started with Apache Nutch in full

UDP/TCP Analysis

by Yoram Orzach | December 2013 | Architecture & Analysis Cookbooks Networking & Telephony Open Source

In this article by Yoram Orzach, the author of Network Analysis Using Wireshark Cookbook, covers the following recipes:

  • Configuring TCP and UDP preferences for troubleshooting
  • TCP connection problems
  • TCP retransmissions – where they come from and why
Read UDP/TCP Analysis in full

Component-based approach of Unity

by Sergey Mohov | December 2013 | Open Source

Unity works using a popular and common approach for game development, which is called the component-based architecture. This approach is widely used in software development to make things more reusable and easier to manage.

Let us talk about the way things are organized in Unity in this article by Sergey Mohov, the author of Practical Game Design with Unity and Playmaker.

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Saying Hello to Unity and Android

by Thomas Finnegan | December 2013 | Games

Welcome to the wonderful world of mobile game development. Whether you are still looking for the right development kit or have already chosen one, this article will be most important. In this article, by Thomas Finnegan, author of the book Unity Android Game Development by Example Beginner's Guide, we explore the various features that come with choosing Unity as your development environment and Android as the target platform. Through comparison with major competitors, it is discovered why Unity and Android stand on the top of the pile. Following that, we examine how Unity and Android work together. Finally, the development environment is set up and we create a simple Hello World application to test that everything is set up correctly. It is assumed you are working in a Windows-based environment.

In this article, we will cover the following topics:

  • Major Unity features
  • Major Android features
  • Unity licensing options
  • Installing the JDK
  • Installing the Android SDK
  • Installing Unity 3D
  • Installing Unity Remote
Read Saying Hello to Unity and Android in full

Managing Alerts

by Andrea Dalle Vacche Stefano Kewan Lee | December 2013 | Open Source

Checking conditions and alarms are the most characteristic functions of any monitoring system, and Zabbix is no exception. What really sets Zabbix apart is that every alarm condition, or triggers—as they are known in this system—can be tied, not only to a single measurement but also to an arbitrary complex calculation, based on all of the data available to the Zabbix server. Furthermore, just as triggers are independent from items, the actions that the server can take based on trigger status are independent from the single trigger, as you will see in the subsequent sections.

In this article written by Andrea Dalle Vacche and Stefano Kewan Lee, authors of the book Mastering Zabbix, you will learn the following things about triggers and actions:

  • How to create complex, intelligent triggers
  • How to minimize the possibility of false positives
  • How to set up Zabbix to take automatic actions based on the trigger status
  • How to rely on escalating actions
Read Managing Alerts in full
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