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We present the design and testing of a 16-bit frequency to digital converter, based on AT89C51 micro-controller, for use in sensing applications. The system generates digital equivalents of frequencies by counting negative transitions of transistor transistor logic signal applied to a designated input of the microcontroller's on-chip counter. The system(More)
Web service is accepted by all communities of services due to its interoperability, flexibility of design and architecture. Improving performance is the key research point for developers and researchers. We propose to design, develop and implement a prototype research electronic automated teller machine web service to study the loads, performance and(More)
– An innovative data-acquisition circuit for temperature monitoring and control is designed and interfaced to printer port of a web server computer. Further, an interactive web application program has been developed and kept running in the server computer for controlling the operation of the data-acquisition circuit. Authenticated clients can access the web(More)
An interactive .NET web application is designed for use in remote monitoring of sensor response within a Local Area Network zone. Key performance metrics of the web application such as response times, throughput, processor and disk utilization are measured by employing a standard testing tool. The impact of concurrent users' activities on the performance(More)
We investigate the effects of antenna parameters on the radiation characteristics of a compact size Rectangular Microstrip Antenna suitable for mobile application. In the calculations of antenna parameters, resonant frequency is set at 3 GHz. In our investigations three low cost substrate materials, namely: (a) irradiated poly-guide with relative dielectric(More)