Past Projects
March 13th, 2010
Prototyping a distributed soil moisture monitoring and irrigation control system:
Current solutions to correctly monitor soil moisture include expensive and bulky sensory equipment which are restricted to just one location due to their design. A distributed monitoring solution shall introduce a capability for autonomous systems in some cases, supersede then need for manual surveying. An example application: local councils neighbouring industrial belts would be interested in monitoring liquid toxic waste disposal using buried wireless devices under the soil.
A low cost and low power solution is sought for deployment in the field; an existing solution is Xbee devices which communicate using ZigBee Protocol. Experiments were conducted to investigate essential communication parameters of deploying a wireless device under soil which includes operational range, depth, attenuation sources, electrical characteristics, sampling frequency, antenna orientation, configuration and protocol. Valuable insight into the suitability of the ZigBee protocol based devices (Xbee) was gained by testing these devices for the above parameters, using spectrum analysers, network analysers and antenna scanners. Xbee devices allow several configuration options, for the project 4 classes of configurations where created: Coordinator, Router, End nodes and Pumps. The hardware setup includes coordinator serially connected to a computer and all other devices wirelessly connected within a valid range of the coordinator. A light sensitive Diode was used to simulate moisture levels which were connected on the end nodes.
An application was developed (using C# on .net framework 3.5) which allows monitoring of Xbee devices (one sample per 5 seconds) and controlling simulated pumps. Features like saving logs to a Database, seeking latest sensor reads and controlling pumps (automatically/manually) were prototyped. A sample web application was created using PHP to exhibit remote network monitoring (http://askohli.net/sensorNet). Final Report
Real Time Operating Systems:
The purpose of this project was to develop two programs which multiply two user defined matrices together using multiple threads. The programming languages which were used to develop these programs were Java and C. Different parts of the matrices were assigned to different threads to multiply simultaneously. The execution times of these programs were calculated as the number of threads and size of the matrices were increased. By analysing the execution times a decision was made on the number of threads which takes the least amount of time to calculate matrix multiplications. Final Report
Software Architecture Engineering:
The purpose of the Emergency Response System (ERS) was to enhance the response time of emergency service providers and manage the presentity of emergency service units. The system will be designed so that it can suggest candidate response units to the service provider based on their location and status. A routing component which can generate a route between two endpoints has been implemented and it to be used within the project. Final Report
ICT- Analysis:
This document contains a comprehensive set of system requirement specifications for the Smart Hospital System (SHS) and provides an outline of the plans associated with the development of the system itself.The document includes a study conducted specifically into the performance needs of the SHS, based on existing systems used within other similar types of hospitals. The most critical aspects of the SHS are also detailed for further consideration. The Preliminary Build Plan provides an initial map of the processes to be undertaken for the implementation and deployment of the SHS itself, based on the analysed requirements found in this document.
Lane Cove Gardening Website:
Voluntary web development for the Lane cove Community aid’s Gardening Service. Link