Chittagong University of Engineering & Technology

About: Chittagong University of Engineering & Technology is a education organization based out in Chittagong, Bangladesh. It is known for research contribution in the topics: Renewable energy & Dielectric. The organization has 1200 authors who have published 1444 publications receiving 10418 citations. The organization is also known as: Engineering College, Chittagong & Bangladesh Institute of Technology, Chittagong.

Load Flow Analysis of a Six Bus System for a Bulk Scale Replacement of Conventional Lighting Loads in a Distributed Network

Abstract: For any distribution system, optimal power flow is a basic requirement to get an efficient output from the system. Optimal power flow supports to optimize the system to get a minimum value of the objective function which serves adequately maximum benefit to both the end-user and participating power entities. Demand Side Management is the standard technique to reduce power consumption during the pick load hour by offering some intensives to the end-users. There is a common interest in power industries to find out the comprehensive network performance of the power system network for different load conditions for the change occurred by demand-side management. This paper compiles an analytical study on an optimal power flow convergence of a network for load clipping during pick load demand hours by a possible energy-efficient load replacement furthermore the result indicates there is a sufficient cost reduction by the load management in the network.

IoT and Computer Vision Based Driver Safety Monitoring System with Risk Prediction

Abstract: A system to monitor driver safety was developed to alarm the driver when he becomes drowsy and also to centrally update driver condition in a database. To measure the concentration level of the driver we averaged few factors such as drowsiness, his face in frame. As most of the methods lack accuracy we used robust facial landmark detectors to detect face in frame and to also detect eyes. By few algorithms, driver drowsiness and drivers face position in frame was detected to alarm the driver locally. At the same time data was uploaded to a database for further inspection. We averaged the data to measure their concentration level and finally made a prediction by using their previous data. This system can be used to notify the driver and take proper actions to prevent the accident before happening

Density, excess molar volume and some of their derived properties of the binary systems of methyl acetate with methyl derivatives of monoethanolamine between 293.15 and 313.15 K

Abstract: Densities at five temperatures in the range 293.15–313.15 K were reported for the systems of methyl acetate + N-methylethanolamine and + N, N-dimethylethanolamine. Excess molar volumes, apparent molar volumes, partial molar volumes and partial volumes at infinite dilution were calculated from the measured density data. Excess molar volumes were calculated from the measurement results and correlated as a function of composition using the Redlich–Kister relation. The densities plotted with respect to mole fraction of alkanolamine were found to be formed maxima at equimolar position for methyl acetate + N-methylethanolamine and were observed linear decrement of density with increasing concentration of alkanolamine for methyl acetate + N, N-dimethylethanolamine system. The excess molar volume represented as a function of mole fraction of alkanolamines showed different behavior for methyl acetate + N-methylethanolamine and methyl acetate + N, N-dimethylethanolamine. The excess molar volumes changed sign from large positive over a wide range of composition to very small negative within a short compositional range for methyl acetate + N, N-dimethylethanolamine system. In contrary, the methyl acetate + N-methylethanolamine system at all temperatures showed the complete negative excess molar volumes over the entire range of composition with minima at equimolar position.

Nonmotorized Commuting Behavior of Middle-Income Working Adults in a Developing Country

Abstract: Although nonmotorized transport (NMT) offers economic, environmental, and health benefits to individuals and communities, understanding nonmotorized travel behavior is a challenging task d...

Impact of V substitution on the physical properties of Ni–Zn–Co ferrites: structural, magnetic, dielectric and electrical properties

Abstract: We have investigated the Vanadium- (V) substituted Ni–Zn–Co ferrites where the samples are prepared using the solid-state reaction technique. The impact of V5+ substitution on the structural, magnetic, dielectric and electrical properties of Ni–Zn–Co ferrites has been studied. The XRD analysis confirms the formation of a single-phase cubic spinel structure. The lattice constants have been calculated both theoretically and experimentally along with other structural parameters such as bulk density, x-ray density and porosity. The FESEM images are studied for analyzing the surface morphology. FTIR measurement confirms spinel structure formation. The saturation magnetization (M s), coercive field (H c) and Bohr magnet on (μ B) are calculated from the obtained M-H loops. The temperature-dependent permeability is studied to obtain the Curie temperature. The frequency and the composition dependence of permeability are also analyzed. Frequency dependent dielectric behavior and ac resistivity are also investigated. An inverse relationship is observed between the composition dependent dielectric constant and ac resistivity. The obtained results such as the electrical resistivity, dielectric constants and magnetic properties suggest the appropriateness of the studied ferrites in microwave device applications.