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Building robots that can walk

In this article, by Richard Grimmett , author of Mastering BeagleBone Robotics , you'll build a quadruped, that is, a robot with four legs. You'll be using 12 servos so that each leg has three points that can move, or three Degrees of Freedom ( DOF ). In this project, you'll control 12 servos at the same time, so it will make more sense to use an external servo controller that can supply the control signals and supply voltages for all the 12 servos.

Role Management

In this article by Gavin Henrick and Karen Holland , author of the book Moodle Administration Essentials , roles play a key part in the ability of the Moodle site. They are able to restrict the access of users to only the data they should have access to, and whether or not they are able to alter it or add to it. In each course, every user will have been assigned a role when they are enrolled, such as teacher, student, or customized role. In this article, we deal with the essential areas of role management that every administrator may have to deal with: Cloning a role Creating a new role Creating a course requester role Overriding a permission in a role in a course Testing a role Manually adding a role to a user in a course Enabling self-enrolment for a course

Introducing vSphere vMotion

In this article by Abhilash G B and Rebecca Fitzhugh author of the book Learning VMware vSphere , we are mostly going to be talking about howvSphere vMotion is a VMware technology used to migrate a running virtual machine from one host to another without altering its power-state. The beauty of the whole process is that it is transparent to the applications running inside the virtual machine. In this section we will understand the inner workings of vMotion and learn how to configure it. There are different types of vMotion, such as: Compute vMotion Storage vMotion Unified vMotion Enhanced vMotion (X-vMotion) Cross vSwitch vMotion Cross vCenter vMotion Long Distance vMotion

Sprites in Action

In this article by Milcho G. Milchev , author of the book SFML Essentials , we will see how we can use SFML to create a customized animation using a sequence of images. We will also see how SFML renders an animation. Animation exists in many forms. The traditional approach to animation is drawing a sequence of images which differ slightly from each other, and showing them on a screen one after the other. Even though this approach is still widely used, there are more elegant alternatives. For example, drawing (or modelling in 3D) only the limbs of a character and then animating how they move relative to time is a technique that saves a lot of time for artists. It also creates smoother results because not every frame of the animation has to be redrawn. In this book, we are going to explore only the traditional approach, since it is the simpler solution for programmers, and in many cases it is enough to bring life to any sprite.

Getting Started with Spring Security

In this article, we'll apply a minimal Spring Security configuration to start addressing the inadvertent privilege escalation due to lack of URL protection and general authentication. We will then build on the basic configuration to provide a customized experience for our users. This article by Robert Winch , author of Spring Security 3.1 , will get you up and running with Spring Security and will provide you with a foundation for any other security-related tasks you will need to perform. During the course of this article, we will: Implement a basic level of security on the JBCP Calendar application, using Spring Security's automatic configuration option Learn how to customize both the login and logout experience Configure Spring Security to restrict access differently, depending upon the URL Leverage Spring Security's expression-based access control Conditionally display basic information about the logged-in user using Spring Security's JSP library Determine the user's default location after login, based upon role

Fine Tune Your Web Application by Profiling and Automation

In this article by James Singleton , author of the book, ASP.NET Core 1.0 High Performance ,sheds some light on how to improve the performance of your web application by profiling and testing it. In this article, we will cover writing automated tests to monitor performance along with adding these to a  Continuous Integration ( CI ) and deployment system by constantly checking for regressions.

Getting Up and Running with Cassandra

As an application developer, you have almost certainly worked with databases extensively. You must have built products using relational databases like MySQL and PostgreSQL, and perhaps experimented with a document store like MongoDB or a key-value database like Redis. While each of these tools has its strengths, you will now consider whether a distributed database like Cassandra might be the best choice for the task at hand. In this article by Mat Brown , author of the book Learning Apache Cassandra , we'll talk about the major reasons to choose Cassandra from among the many database options available to you. Having established that Cassandra is a great choice, we'll go through the nuts and bolts of getting a local Cassandra installation up and running. By the end of this article, you'll know: When and why Cassandra is a good choice for your application How to install Cassandra on your development machine How to interact with Cassandra using cqlsh How to create a keyspace

Push your data to the Web

This article covers the following topics: An introduction to the Shiny app framework Creating your first Shiny app The connection between the server file and the user interface The concept of reactive programming Different types of interface layouts, widgets, and Shiny tags How to create a dynamic user interface Ways to share your Shiny applications with others How to deploy Shiny apps to the web

Data Tables and DataTables Plugin in jQuery 1.3 with PHP

The jQuery DataTables and Data tables plugin allows you to work with features like sorting, filtering, and pagination while working with PHP.

Overview of Process Management in Microsoft Visio 2013

This article by David J. Parker , the author of the book Microsoft Visio 2013 Business Process Diagramming and Validation , introduces Microsoft Visio and the features that support process management; further it explores the built-in templates with validation rules.

Building a Gallery Application

In this article by Michael Williams , author of the book Xamarin Blueprints , will walk you through native development with Xamarin by building an iOS and Android application that will read from your local gallery files and display them in a UITableView and ListView . 

Adding Charts to Dashboards

In this article by Vince Sesto , author of the book Learning Splunk Web Framework, we will study adding charts to dashboards. We have a development branch to work from and we are going to work further with the SimpleXMLDashboard dashboard. We should already be on our development server environment as we have just switched over to our new development branch. 

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