A series of one-dimensional studies is presented to reveal basic aspects of momentum and energy transfer to plates in air blasts. Intense air waves are initiated as either an isolated propagating wave or by the sudden release of a highly compressed air layer. Wave momentum is determined in terms of the energy characterizing the compressed layer. The interaction of intense waves with freestandin...

This study investigated the enhancement of solar disinfection using custom-made batch reactors with reflective (foil-backed) or absorptive (black-backed) rear surfaces, under a range of weather conditions in India. Plate counts of Escherichia coli ATCC11775 were made under aerobic conditions and under conditions where reactive oxygen species (ROS) were neutralised, i.e. in growth medium supplem...

Proof of concept of a cavity backed slot antenna based on inverted microstrip gap ‎waveguide (IMGW) technology is presented. Since the antenna is operating based on the ‎first resonating mode of the cavity, it is more compact compared to the ordinary cavity ‎backed slot antennas in which the second cavity mode is used for radiation. Furthermore, ‎the proposed antenna element introduces lower lo...

Noise reduction inside waveguide systems has gained momentum owing to a great interest in it. To attenuate the sound broad frequency range, this study aims compare effects of two acoustic liners, perforated plate backed by an air cavity (PP-Air cavity), or porous material (PP-PM), on behaviour lined ducts using numerical model compute multimodal scattering matrix. From matrix, reflection and tr...

Dynamic foot pressure measurement is necessary particularly for diabetic patients to prevent ulcers, eventually leading to gangrene and amputation. The present work reports a low cost optical sensing system for the above, suitable for the Third World. It uses a horizontally placed transparent Acrylic plate with a webcam placed below facing upwards. A white paper, backed by a black adhesive plas...

Commercial mortgage backed securities (CMBS) are complex asset backed securities trading in markets that do not currently use derivatives pricing technology. This lack of usage is due to the complexity of the modeling exercise, and only the recent and costly availability of historical data. As such, CMBS markets provide a natural environment for the testing of market efficiency with respect to ...

Isothermal thin-layer chromatography in a non-thermostatted horizontal chamber has been investigated at sub-ambient and elevated temperatures. The rate of temperature equilibration was determined for the commercially available Chromdes DS-L horizontal TLC chamber placed in a circulating-air incubator. The time required for temperature equilibration was also studied for commonly used glass and a...