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.

Design of an x-band microstrip array antenna for circular polarization

Abstract: In this paper, the design of a circularly polarized array antenna with 956 dBi of gain at 10 GHz frequency is presented The proposed antenna consists of a 2×2 array antenna with feed network where all microstrip patches are linearly polarized “Both-Sided MIC Technology” is used to design the proposed array antenna The simulated return loss of the proposed array antenna is less than −35dB The 3 dB axial ratio bandwidth of 221% is obtained The unequal feed line is used in order to realize 90° phase difference between the linearly polarized patches Therefore, the circular polarization is realized by the combination of linearly polarized patches and unequal feed line The structure and the basic behavior along with the simulation results of the proposed linearly polarized array antenna are demonstrated in this paper

Indoor heat stress and cooling energy comparison between green roof (GR) and non-green roof (n-GR) by simulations for labor intensive factories in the tropics

Abstract: This study is based on labor intensive factory, located in Dhaka, Bangladesh which was adversely impacted due to extreme hot conditions The analysis started with the implementation of green roof (GR) as one of the passive design strategies to reduce indoor heat stress Impact of indoor heat stress indicated by wet bulb globe temperature (WBGT) and prediction of heat strain (PHS) model for green roof have been evaluated through numerical studies and indoor environmental data of local factory was measured by portable weather station A factory energy model (by Energyplus and Open Studio) based on one of the surveyed factory’s production space including different activity zones and lab test material’s properties was developed and different roof variables were evaluated The result indicated that GR has significant contributions on indoor heat stress reduction and substrate indoor temperature decreases (25–35 °C) with increasing vegetal coverage It has been also examined the ratio of indoor temperature fluctuation and relatively higher standard deviation (SD) observed for non-green roof (n-GR) condition For summer, it was also quantified that indoor WBGT and PHS criteria for the workers became 2–25 times lower from the high risk level due to the effectiveness of GR

Efficient Smart Water Management System Using IoT Technology

Abstract: Water is the most precious and important chemical substance since it is a basic necessity of all human beings; nevertheless, the water supply department is currently experiencing a difficulty in real-time operation owing to a lack of water in resources due to decreased rainfall. Because water has become a critical concern that impacts water distribution, interrupted water supply, water conservation, water consumption, and water quality, urban residential areas have grown in size as the population has grown. So, in order to solve water supply problems and make the system more efficient, a robust monitoring and control system is required. In addition, with the ever-increasing demand for water and the developing dispute over diverse uses of water over the decades, water resource management has become a critical requirement in Bangladesh. This suggested approach on the IoT platform focuses on continuous and real-time monitoring of water supply. Water supply with continuous monitoring ensures appropriate distribution, allowing for a record of available water in tanks, flow rate, and distribution line anomalies. The Internet of Things is a network of physical items that are equipped with electronics, sensors, software, and network connectivity. As a central office, monitoring may be done from anywhere. Using Adafruit as a free server, data is continually uploaded to the cloud, allowing data to be seen and tracked in real time. Via several sensors, a controller, and a Raspberry Pi as a minicomputer, data can be monitored and operations may be controlled from the cloud using efficient client-server communication.

An integrated algorithm for local sequence alignment

Abstract: Local sequence alignment (LSA) is an essential part of DNA sequencing LSA helps to identify the facts in biological identity, criminal investigations, disease identification, drug design and research Large volume of biological data makes difficulties to the performance of efficient analysis and proper management of data in small space has become a serious issue We have subdivided the data sets into various segments to reduce the data sets as well as for efficient memory use The integration of dynamic programming (DP) and Chapman–Kolmogorov equations (CKE) makes the analysis faster The subdivision process is named data reducing process (DRP) DRP is imposed before DP and CKE This approach needs less space compared with other methods and the time requirement is also improved

Dense prediction of label noise for learning building extraction from aerial drone imagery

Abstract: Label noise is a commonly encountered problem in learning building extraction tasks; its presence can reduce performance and increase learning complexity. This is especially true for cases where hi...