scispace - formally typeset
Search or ask a question
Institution

Chittagong University of Engineering & Technology

EducationChittagong, Bangladesh
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.


Papers
More filters
Journal ArticleDOI
TL;DR: In this paper, an alternative fuel, biodiesel generation, has been proposed in order to minimize the investment in imported high speed diesel (HSD) as well as environmental pollution, which consequences a negative impact on the cash flow of the overall economy.
Abstract: During this industrialized era, consumption of high-speed diesel (HSD) is increasing rapidly in the power, transportation, agriculture, and other commercial sectors of Bangladesh, albeit a significant amount of HSD is imported from foreign countries. The fuel mono-dependency on imported HSD demands huge economic investment of any country that consequences a negative impact on the cash flow of the overall economy. This study emphasized the contribution of HSD from petroleum products in significant fields and provided the current scenario of diesel import. Besides fuel issues, the other major environmental concern of Bangladesh is tremendous carbon emission caused by the overuse of diesel that consequences severe environmental pollution. To minimize the investment in imported HSD as well as environmental pollution, an alternative fuel, biodiesel generation, has been proposed in this study. This study also projected the total approximate biodiesel production from chicken skin collected from the whole of Bangladesh. Besides, this study also predicted the possible amount of can be replaced by biodiesel from chicken skin and aimed at the cost reduction due to the replacement of diesel by biodiesel.

30 citations

Journal ArticleDOI
01 Jul 2019
TL;DR: Three new distinct and effective features with some existing features related to shape, size and color properties of dermoscopy images based on ABCD rule for melanoma detection are proposed, indicating that the proposed system is able to assist the dermatologists in early detection of melanoma.
Abstract: Melanoma is the deadliest type of skin cancer. It has been rising exponentially for the last few decades. If it is diagnosed and treated at its early stage, the survival rate is very high. To prevent the invasive biopsy technique, automated diagnosis of melanoma from dermoscopy images has become a hot research area for the last few decades. This paper proposes three new distinct and effective features with some existing features related to shape, size and color properties of dermoscopy images based on ABCD rule for melanoma detection. ABCD stands for Asymmetry, Border, Color, and Diameter of the skin lesion. A two-stage segmentation approach including Otsu algorithm and Chan–Vese algorithm for lesion segmentation is implemented in this paper. Dull-Razor algorithm removes the black and dark hair from the input images and artificial neural network classifier classifies the malignant and benign images based on the extracted features. Implementation result of the proposed approach achieves 98.2% overall classification accuracy with 98% sensitivity and 98.2% specificity. These promising results indicate that the proposed system is able to assist the dermatologists in early detection of melanoma.

29 citations

Journal ArticleDOI
01 May 2020-Energy
TL;DR: In this article, the authors reported the thermoelectric performance of graphene-zinc oxide hybrid cement composites for the first time and achieved the maximum figure of merit (ZT) of 0.01.

29 citations

Journal ArticleDOI
TL;DR: In this article, the effect of sintering temperature on the physical properties (bulk density, porosity and permeability) of Y-substituted Mg0.5Zn 0.5YxFe2−xO4 (0.
Abstract: Optimum sintering temperature (Ts) plays an important role in controlling densification and growth of grains which greatly affect the magnetic and electrical properties of polycrystalline materials. Y-substituted Mg-Zn [Mg0.5Zn0.5YxFe2−xO4 (0 ≤ x ≤ 0.05)] ferrites have been prepared by using conventional standard ceramic technique and were sintered between 1100 and 1300 °C in the steps of 50 °C. Characterizations of the samples have been done by X-ray diffraction (XRD) technique, field emission scanning electron microscopy (FESEM), dielectric and permeability measurements to find the suitable Ts. XRD data have been analyzed and the results confirmed the same information regarding phase analysis at different Ts. Further characterization of the samples, sintered at 1100 and 1150 °C, were not continued due to their low density and high porosity. FESEM images indicate the change in microstructure with Ts. The decrease (increase) of ac electrical resistivity with Ts (Y content) has been observed while the dielectric constant behaves in opposite manner. Impedance spectroscopy also exhibited similar trend as ac electrical resistivity. The initial permeability revealed the wide stability zone of frequency and different optimum Ts for different compositions. The ac resistivity values for the compositions have been found higher at 1200 °C, but the compositions have highest value of bulk density and permeability at other Ts. The effect of Ts on the physical properties (bulk density, porosity and permeability) of Y-substituted Mg0.5Zn0.5YxFe2−xO4 (0 ≤ x ≤ 0.05) ferrites elucidate that the optimum Ts should be of 1250 °C for x = 0.01, 0.02 and 0.03 while the Ts should be of 1300 °C for x = 0.04 and 0.05.

29 citations

Journal ArticleDOI
TL;DR: In this article, a nanocomposite WO3/TiO2 working under visible-light (λ ≥ 420 nm) has been prepared employing cis-butenedioic acid to associate component semiconductors of WO 3 and TiO 2 nanoparticle.
Abstract: Global environmental pollution is thought to be the principal source of emission of industrial untreated effluent. Photocatalysis is the versatile process to eliminate these pollutants which is utilizing semiconductor metal oxides. A nanocomposite WO3/TiO2 working under visible-light (λ ≥ 420 nm) has been prepared employing cis-butenedioic acid to associate component semiconductors of WO3 and TiO2 nanoparticle. The composite was optimized to 5 mol% WO3/TiO2 in terms of photocatalytic activity to decompose phenol and methylene blue dye in aqueous under visible-light. Afterwards, Au nanoparticle was deposited on to the surface of optimized WO3/TiO2. Au loaded WO3/TiO2 were characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), energy-dispersive X-ray spectroscope (EDX) mapping and UV–vis absorption spectra. Photocatalytic efficiency of Au-WO3/TiO2 has been measured to degrade above organic pollutants in aqueous phase under visible-light. Au-WO3/TiO2 demonstrated extraordinarily high photocatalytic efficiency in decomposing the pollutants compare to 5 mol% WO3/TiO2 nanocomposite. After 120 min of visible irradiation, 63 % decomposition of phenol and 52 % degradation of methylene blue dye was observed under the identical condition. The outstanding improvement of photocatalytic efficiency of Au-WO3/TiO2 nanocomposite ascribed due to the perfect matching of energy band positions of WO3 and TiO2 which inhibit photo-excited (e‾)–hole (h+) recombination as well as favor inter particle transfer between WO3 and TiO2. Au nanoparticles enhances transfer of electron (e‾) from CB of WO3. Thus, possible recombination of photo-excited electron (e‾)–hole (h+) pair was retarded and photocatalytic efficiency was greatly improved.

29 citations


Authors

Showing all 1219 results

Network Information
Related Institutions (5)
Bangladesh University of Engineering and Technology
7.6K papers, 83.9K citations

89% related

University of Dhaka
9.8K papers, 136.4K citations

83% related

Tomsk Polytechnic University
13.2K papers, 103.7K citations

79% related

Universiti Malaysia Pahang
9.5K papers, 104.4K citations

78% related

University of Engineering and Technology, Lahore
7.9K papers, 82.3K citations

77% related

Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20234
202240
2021243
2020241
2019228
2018119