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: Computer science & Renewable energy. 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.

A Lightweight Deep Convolutional Neural Network Model for Real-Time Age and Gender Prediction

Abstract: Recognition of age and gender has become a significant part of the biometric system, protection, and treatment It is widely used for people to access age-related content It is used by social media in the distribution of layered advertising and promotions to expand its scope Application of face detection has grown to a great extent that we should upgrade it using various methods to achieve more accurate results In this paper, we have developed a lightweight deep Convolution neural network model for real-time age and gender prediction For making the training dataset more diverse, Wiki, UTKFace, and Adience datasets have been merged into one containing 18728 images Using this vast mixed dataset, we have achieved accuracy of 4859% and 8076% for age and gender respectively Further, the model is tested in real-time Different experimental investigations on the prepared dataset show that with most recent approaches, our model provides competitive prediction accuracy

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.

Viscometric Studies of Molecular Interactions in Binary Liquid Mixtures of Isomeric Xylenes with Methanol

Abstract: Dynamic viscosities (ηexp) for the binary mixtures of methanol with isomeric (o-, m-, and p-derivatives) xylenes were measured at T = (303.15, 308.15, 313.15, 318.15, and 323.15) K and atmospheric pressure (p = 101 kPa). The viscosity deviation (Δη) that has been derived from the ηexp was correlated using a Redlich–Kister-type equation. The ηexp values were compared with the calculated viscosities (ηcal) obtained using generalized correlation models, such as Bingham, Arrhenius, Kendall–Monroe, Grunberg–Nissan, and Andrade/DIPPR. The changes in the ηexp of solvent mixtures rather than in the pure fluids, or deviations from ηcal, have been discussed in terms of the molecular interactions and structural effects due to the component molecules. Furthermore, the quantum chemical density-functional theory calculations were used to predict the optimized geometry and total energies of the pure fluids and their binary mixtures.

Impact of Urban Development and Vegetation on Land Surface Temperature of Dhaka City

Abstract: This paper addresses both quantitative and qualitative assessment of the relationship between the land surface temperatures (LST) and land cover (LC) changes in Dhaka Metro Area (DMA) using Landsat TM/ETM+ data over the period from 1989 to 2010. The LC map was prepared using supervised classification methods. On the other hand, using the calibration of spectral radiance and emissivity correction LST has been derived from the thermal band of Landsat TM/ETM+. To establish the relationship between LST and LC, GIS based spatial simulation has been conducted. The changing of LST is found to be directly correlated with LC transition. LST has shown to increase in areas with growing urban developments. In contrary, the amount of Vegetation (NDVI) is negatively correlated with LST. The trend of LST and LC transitions indicates that LST will be abruptly increased in near future. The urban LST maps, the analyses of thermal-land cover relationships and the spatial simulated results thus obtained could be used as strategies for quality improvement of urban environment and a smart solution to the reduction of Urban Heat Island (UHI) effect.

Performance Analysis of a Microstrip Patch Antenna for Biomedical Applications

Abstract: A microstrip patch antenna's design and performance analysis for biomedical applications which operating at 2.45 GHz frequency range in ISM Band (2.4 GHz to 2.5 GHz) is represented in this paper. The antenna's good-looking feature is the proper thickness and suitable dimension. The special feature of this antenna is to make it perfect for On-body matched biomedical applications. FR4 material is used as the substrate to design the antenna. Individual properties of the Phantom model are perfectly maintained to get proper software simulated result. All the simulations, calculations and parameter results are fit for on-body matched conditions. To design the antenna CST Microwave Studio is used. Impressive S 11 of more than −50 dB for off-body and on-body as well as Specific absorption rate (SAR) of 0.0005 W/kg in on-body make the antenna compatible for biomedical application.