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.

Detection of Glaucoma using ORB (Oriented FAST and Rotated BRIEF) Feature Extraction

Abstract: This research was utilized to identify glaucoma, a type of eye illness. This endeavor necessitates the use of pictures from the fundus camera for image processing. This study reflects the effort done to detect glaucoma-affected eyes utilizing image feature extraction using Oriented FAST and Rotated BRIEF (ORB). ORB is a binary descriptor approach that is based on BRIEF and is highly fast. This technique is insensitive to picture noise and is invariant to any rotation. ORB is two orders of magnitude faster than SURF and performs similarly to SIFT. It is more efficient than other texture analysis methods. It is less computationally difficult than other approaches in the literature. This technique extracts features and detects texture by inspecting each pixel of the retina picture. It was trained on 160 fundus pictures of normal and glaucoma-affected retinas. After that, any healthy or glaucoma-affected eye may be easily recognized by obtaining an accurate eye picture. The results reveal that this technique has a precision and accuracy of more than 90%.

PB/MC-CDMA : A nobel modulation technique and multiple access scheme for broadband wireless communication

Abstract: In the presence of frequency-selective multi path fading channels, Multi Carrier Code Division Multiple Access (MC-CDMA) suffers from multi-user interference (MUI) and inter-symbol interference (ISI). In this paper, the Partial Block MC-CDMA system was proposed and Performance of the system was analyzed. In the conventional MC-CDMA system, users are affected by MUI (multi-user experience) because all users use whole bandwidth. By the MUI, performance is degraded as the number of user increases. Furthermore, number of maximum user is limited to the length of spreading code. However, proposed system can increase the system performance by limiting MUI through assigning the users to the block-unit sub-carrier. And user capacity of the proposed system is much better than conventional system because spreading code can be reused in each block. And the proposed system can get frequency diversity gain so that performance becomes better. Performance is analyzed, and simulations are carried out to illustrate the merits of PB/MC-CDMA relative to existing alternatives given in this document.

Recently synthesized (Ti1-xMox)2AlC (0 < x < 0.20) solids solutions: Deciphering the structural, electronic, mechanical and thermodynamic properties via ab initio simulations

Abstract: The structural, electronic, mechanical and thermodynamic properties of (Ti1-xMox)2AlC (0 < x < 0.20) were explored via density functional theory. The obtained lattice constants agree well with the experimental values. The electronic band structure confirms the metallic nature. Strengthening of covalent bonds due to Mo substitution is confirmed from the study of band structure, electronic density of states and charge density mapping. The elastic constants satisfy the mechanical stability criteria. Strengthening of covalent bonds leads to enhanced mechanical properties. (Ti1-xMox)2AlC compounds are found to exhibit brittle behavior. The anisotropic nature of (Ti1-xMox)2AlC is revealed from the direction dependent Young's modulus, compressibility, shear modulus and Poisson's ratio as well as the shear anisotropic constants and the universal anisotropic factor. The Debye temperature, minimum thermal conductivity, Gruneisen parameter and melting temperature of (Ti1-xMox)2AlC have been calculated for different Mo contents. Our calculated values are compared with reported values, where available.

An Evolutionary Population Census Application Through Mobile Crowdsourcing

Abstract: Mobile Crowdsourcing System (MCS) has emerged as an effective method for data collection and processing In this paper, a brief discussion of the concept of Mobile Crowdsourcing system has been given where the main criteria of MCS is followed The government or the census bureau performs the role of end user, the internet provider and some monitoring supervisor performs the role of service provider and the smart phone users can perform the role of worker The whole country has been divided into some regions for counting the population, each region has been divided into several sub-regions There will be a supervisor in each sub-region with a number of selected workers who will be checked on their own reliability and authentication on the basis of verification of personal information An authenticated worker can collect information from a sub-region and the supervisor is able to determine the location of the worker After collecting information, redundancy is checked using National Identity or birth registration number and stored after completing the verification process and used to make statistics including total population, population density, rate of birth, rate of death, rate of literacy etc Population and household census process is a more important issue for the country So, a census system or model has been proposed and designed for performing the whole census process with more authentication that reduce cost and time and make a faster calculation

NH 4 Cl thin film fabrication by close spaced sublimation

Abstract: Thin-film technology is a low cost technology for electronic semiconductor devices and optical devices. Thin films are emerging technology for low cost PV applications. Thin film solar cells can be fabricated on glass substrate by close spaced sublimation (CSS) process for very low cost approach. In this work it has been designed and implemented a prototype CSS chamber for fabricating thin films by CSS on glass substrate at different source temperatures with constant chamber pressure. In this work it has been observed that the color of deposited NH4Cl thin films changes from white to brown with increased source temperature. A NH4Cl thin film has been fabricated in the Renewable Energy Lab of Chittagong University of Engineering & Technology (CUET) successfully by CSS process. It is anticipated that more thin film and complete devices will be fabricated in the lab soon.