January 2013
Influence of cross section shape of the coil turns on the induction heating process
Different common shapes of the RF-coil turns in induction heating systems were considered and corresponding results of electromagnetic fields, eddy currents and volumetric heat generation have been computed using a 2D finite element method. For calculations, rectangular (symmetric, asymmetric and shielded), circular, D-shape and -shape have been considered for the cross section of the coil turns. The obtained...
January 2013
Contact-free measurement of cardiopulmonary signatures via a microwave Doppler radar using adaptive filter
It has been proven that the respiration and heartbeat signals can be contact-free detected via a microwave Doppler radar. However, the heartbeat signal cannot be identified from the body-movement signal when the human subject breathes freely. To resolve the problem, the adaptive filter is used to simultaneously measure the heartbeat and the respiration signal. Firstly, the respiration and the body-movement signal are...
January 2013
Photosynthetic pigments, nitrogen status, and flower behavior in eggplant exposed to different sources and levels of potassium
The aim of this study was to investigate (i) the influence of different sources and levels of potassium on photosynthetic pigments, (ii) measure nitrogen status in leaf, (iii) evaluate flower behavior in eggplant (Solanum melongena L.), and (iv) to identify a better potassium source to cultivation of this species. The experiment design used was in factorial scheme with randomized blocks, being composed by 2...
January 2013
Physico-chemical quality of some commonly consumed stimulants and spices in Nigeria
Commonly consumed parts of Tetracarpidium conophorium, Garcinia kola, Cola acuminata, Cola nitida and Afromomum melengueta were investigated for their trace metals, pH, conductivity and total dissolved solid values. Trace metal levels ranged between 42.24 ± 6.23 to 541.51 ± 189.37 µg/g Co and 36500.23 ± 367.01 to 115280.25 ± 397.33 µg/g K....
January 2013
Fuzzy logic based control of mobile robot navigation: A case study on iRobot Roomba Platform
This work addresses the issue of mobile robot navigation system. In this study, the proposed navigation system is introduced. It combines a deliberative planning and a reactive/behaviour based control, based upon the motor schema technique into hybrid control architecture. Behaviour based robots have successfully demonstrated their performance in reacting to different working environments. However, it is difficult...
January 2013
Microcirculation of thyroid gland in the Lyle’s flying fox (Pteropus lylei)
Lyle’s flying fox (Pteropus lylei), a bat, normally hangs upside down on a tree, and needs high metabolism to change the position abruptly. Thyroid gland involves in body metabolic control with high blood supply. Therefore, the cellular structures and microcirculation of thyroid glands in the male animals were investigated to examine suitable structural adjustments for their behaviors by using light microscopy...
January 2013
Effects of Bonny light crude oil contamination on the germination, shoot growth and rhizobacterial flora of Vigna unguiculata and Arachis hypogea grown in sandy loam soil
This study was carried out to evaluate the effects of different levels of Bonny light crude oil contamination on the germination, shoot growth and rhizobacterial flora ofVigna unguiculata (cowpea) and Arachis hypogea (groundnut) grown in potted sandy loam soil samples in Nsukka, Nigeria. Crude oil at a level of 2.5% increased germination time in cowpea by 24 h but at higher doses (5 to 20%) germination of...
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