Clunky, the robot

Clunky, the robot
Clunky is my first animated robot. It is modeled and animated using a combination of Sketchup and Blender. Click on the image to see the barely moving robot

Graph Layout – Part 1

Graph Layout - Part 1
Many applications, especially those that require visualizing complex information, rely on manipulating and presenting data as graphs composed of nodes and links. A graph, in the mathematical context, is a set of objects represented as vertices, or nodes, and a set of links connecting some pairs of objects. The graph may be used in social ...

Graph Animation

Graph Animation
This is another example of using Processing to create animations. The GraphAnimation program demonstrates packet forwarding by flooding. A packet sent by node A is replicated by every node (router) it reaches and sent in all connected links until it reaches the destination node N. Knowing the shortest route, node N replies with a unicast ...

Network Availability: the quest for the five nines

Network Availability: the quest for the five nines
Any organization that relies on data networks for its core operations needs to ensure the continued availability of its network infrastructure, which includes LAN devices (switches, routers, firewalls, etc.), WAN links, Internet and cloud connections, and the support facilities (power, air conditioning, etc.). The network operator may achieve the desired level of LAN availability using ...

Vehicles communication and the mysterious traffic jams

Vehicles communication and the mysterious traffic jams
Have you been stuck in traffic driving a car at the speed of a few meters per hour only to emerge from the traffic jam a while later not certain what caused it in the first place? Traffic experts are likely to attribute the cause to a road construction, a vehicle collision, or any other ...

Connectivity with Dark Fibre and Carrier Ethernet Services

Connectivity with Dark Fibre and Carrier Ethernet Services
Network service providers (a.k.a communication carriers) are offering multiple services suitable for MAN (metropolitan area network) and WAN (wide area network) connectivity. This article introduces two of these services that offer unique benefits to organizations seeking this type of network connectivity. Dark Fibre Service Dark fibre refers to optical fibre cables that have been installed ...

What is SDN?

What is SDN?
Software Defined Networks (SDN) is a new technology with a lot of potential and a healthy dose of hype. The main premise of SDN is moving the intelligence of the network from distributed network nodes to a centralized location to enable programmability and flexibility of configuration through software applications. Each router in today’s communication networks ...

Multi-homed Internet Connectivity using BGP

Connectivity to the Internet through more than one upstream ISP (Internet Service Provider) is referred to as multi-homing (or dual-homing in case of two ISPs). Multi-homing is generally required to increase the reliability of the Internet connection by reducing the reliance on a single provider and eliminating single-point-of –failure in the IP network. Dual- or ...

Arduino robot kit – Line Following

Arduino robot kit – Line Following
<first published on Dec 26, 2012> The Robot kit I’m building comes with three IR line tracking sensor modules. As with the other components, documentation is only available on the web. I have not found a source of information about how to use the sensors but it doesn’t seem to be that complicated. — UPDATE ...

Arduino IR Receiver Module

Arduino IR Receiver Module
This post describes how to use the Keyes IR Receiver Module in a practical application.  The setup used in this experiment is shown in the picture to the right and it includes Arduino UNO card (hidden under an Ethernet shield), a display module JY-LKM1638, a Keyes IR Receiver module and a remote controller. The last two items ...