Browsing by Author "Akter, S."

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A STUDY ON GROUND WATER LEVEL FLUCTUATION IN SELECTED AREA O F CHITTAGONG CITY
(Dept. of CE, CUET, 19-Dec-2018) Akter, S.; Hossen, M. A.; Das, S.
Southern part of Bangladesh is now facing water scarcity problems in both agriculture and secured livelihood. Ground water forms the major portion of earth’s fresh water source and it is almost safe to drink. Depletion of ground water table due to continuous pumping is causing scarcity of water in the city area of Bangladesh. So, information about ground water table is required for future recommendation of ground water supply to general people. For the investigation purpose, depth of water table has been determined in one season with respect to mean sea level. 41 wards of Chittagong City Corporation along north-south direction of 91˚47´ longitude and east-west direction of 22˚20´ latitude have been selected for this purpose where depth of water table has been measured from the shallow and deep tube well. The present investigation includes field investigation with the aim of measuring water level from ground surface. From this investigation, it has been established that, water table with respect to mean sea level is different at different wards. During field investigation, 82 shallow tube wells and 82 deep tube wells in 41 wards were found. The overall view shows that, in almost every ward, deep tube well is must to find fresh water as shallow tube well can’t frequently pump water. From the investigation, it is also clear that ground water table is lowering day by day. At the beginning of rainy season when it started to rain the water table comes up. Ground water through shallow tube well is not sufficient to fulfill the required demand for the general people as it is becoming out of reach through shallow well day by day. Depth of water table with respect to mean sea level is quite lower in ward 37& depth of water table with respect to mean sea level is quite higher in ward 13. The study was also carried out to assess groundwater table of Chittagong city. From this analysis, it is found that the GW level is lowering in almost all the region of the study. So, alternative water source should be ensured to mitigate the problem.
Anthropological approach to improve moderately malnourished children within BINP communities [abstract]
(2001-08) Roy, S.K.; Fuchs, G.J.; Mahmood, Z.; Akter, S.
Deep Neural Network-Based Approach to Identify the Paddy Leaf Disease using ResNet50-V2
(Elsevier, 2023-10-21) Islam, M.A.; Rahman, M.M.; Shohan, A.A.; Pulok, R.A.; Akter, S.; Ahmed, M.T.
South Asian countries especially Bangladesh, India, and Srilanka are very involved in paddy cultivation. In Bangladesh and India, one of the key producing crops is paddy. Worldwide more than 40 percent of the world's population derives most of its calories from rice and traditionally farmers are directly involved production of rice. But every year lot of farmers have to face a tremendous amount of loss due to paddy leaf disease. Major of the farmers do not know how to identify perfectly in the primary stage that's why they are facing loss. Due to the increase in population, it is very important to make paddy cultivation scientific and produce more. There are more than 30 types of paddy leaf disease and from there in Bangladesh, approximately 10 types of disease are quite similar. If it is possible to ensure the leaf disease in the very primary stage within a very short time, then every farmer can reduce their loss. Nowadays many researchers are interested in identifying paddy leaf disease using modern science. In this paper, we worked on paddy leaf disease detection and it has worked on 4 types of disease and 1 healthy and without any disease leaf class of paddy. This paper through an automated detection approach using deep learning techniques achieved the highest accuracy instead of the previous applicable working model and traditional manual disease detection process. In this paper, we have analyzed it using 4 different types of models. ResNet50-V2, Inception-V3, MobileNet-V2, and DensNet-201 algorithm models have been applied here and the finding of the research is, that all the models achieved more than 95% accuracy from these ResNet50-V2 has achieved the best accuracy and it is 99.06%. We hope that these deep learning models and techniques will detect the disease with high accuracy in the very beginning time and it will help reduce damage and loss of paddy cultivation. © 2023 IEEE.
Development of an Advanced DNA Biosensor for Pathogenic Vibrio Cholerae Detection in Real Sample
(Biosensors and Bioelectronics, Elsevier, 2021) Ali, M. R.; Bacchu, M.S.; Setu, M.A.A.; Akter, S.; Hasan, M. N.; Chowdhury, F.T.; Rahman, M.M.; Ahommed, M.S.; Khan, M.Z.H.
Due to the epidemics of emerging microbial diseases worldwide, the accurate and rapid quantification of pathogenic bacteria is extremely critical. In this work, a highly sensitive DNA-based electrochemical biosensor has been developed to detect Vibrio cholerae using gold nanocube and 3-aminopropyltriethoxysilane (APTES) modified glassy carbon electrode (GCE) with DNA carrier matrix. Electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) experiments were performed to interrogate the proposed sensor at each stage of preparation. The biosensor has demonstrated high sensitivity with a wide linear response range to target DNA from 10−8 to 10−14 (R2 = 0.992) and 10−14 to 10−27 molL−1 (R2 = 0.993) with a limit of detection (LOD) value of 7.41 × 10−30 molL−1 (S/N = 5). The biosensor also exhibits a selective detection behavior in bacterial cultures that belong to the same and distant genera. Moreover, the proposed sensor can be used for six consecutive DNA assays with a repeatability relative standard deviations (RSD) value of 5% (n = 5). Besides, the DNA biosensor shows excellent recovery for detecting V. cholerae in poultry feces, indicating that the designed biosensor could become a powerful tool for pathogenic microorganisms screening in clinical diagnostics, food safety, and environmental monitoring.
Development of an Advanced DNA Biosensor for Pathogenic Vibrio Cholerae Detection in Real Sample
(Biosensors and Bioelectronics, Elsevier, 2021-09-15) Ali, M.R.; Bacchu, M.S.; Setu, M.A.A.; Akter, S.; Hasan, M.N.; Chowdhury, F.T.; Rahman, M.M.; Ahommed, M.S.; Khan, M.Z.H.
Due to the epidemics of emerging microbial diseases worldwide, the accurate and rapid quantification of pathogenic bacteria is extremely critical. In this work, a highly sensitive DNA-based electrochemical biosensor has been developed to detect Vibrio cholerae using gold nanocube and 3-aminopropyltriethoxysilane (APTES) modified glassy carbon electrode (GCE) with DNA carrier matrix. Electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) experiments were performed to interrogate the proposed sensor at each stage of preparation. The biosensor has demonstrated high sensitivity with a wide linear response range to target DNA from 10−8 to 10−14 (R2 = 0.992) and 10−14 to 10−27 molL−1 (R2 = 0.993) with a limit of detection (LOD) value of 7.41 × 10−30 molL−1 (S/N = 5). The biosensor also exhibits a selective detection behavior in bacterial cultures that belong to the same and distant genera. Moreover, the proposed sensor can be used for six consecutive DNA assays with a repeatability relative standard deviations (RSD) value of 5% (n = 5). Besides, the DNA biosensor shows excellent recovery for detecting V. cholerae in poultry feces, indicating that the designed biosensor could become a powerful tool for pathogenic microorganisms screening in clinical diagnostics, food safety, and environmental monitoring.
Development of an Advanced DNA Biosensor for Pathogenic Vibrio Cholerae Detection in Real Sample
(Biosensors and Bioelectronics, Elsevier, 2021) Ali, M.R.; Bacchu, M.S.; Akter, S.; Hasan, M.N.; Chowdhury, F.T.; Rahman, M.M.; Ahommed, M.S.
Due to the epidemics of emerging microbial diseases worldwide, the accurate and rapid quantification of pathogenic bacteria is extremely critical. In this work, a highly sensitive DNA-based electrochemical biosensor has been developed to detect Vibrio cholerae using gold nanocube and 3-aminopropyltriethoxysilane (APTES) modified glassy carbon electrode (GCE) with DNA carrier matrix. Electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) experiments were performed to interrogate the proposed sensor at each stage of preparation. The biosensor has demonstrated high sensitivity with a wide linear response range to target DNA from 10−8 to 10−14 (R2 = 0.992) and 10−14 to 10−27 molL−1 (R2 = 0.993) with a limit of detection (LOD) value of 7.41 × 10−30 molL−1 (S/N = 5). The biosensor also exhibits a selective detection behavior in bacterial cultures that belong to the same and distant genera. Moreover, the proposed sensor can be used for six consecutive DNA assays with a repeatability relative standard deviations (RSD) value of 5% (n = 5). Besides, the DNA biosensor shows excellent recovery for detecting V. cholerae in poultry feces, indicating that the designed biosensor could become a powerful tool for pathogenic microorganisms screening in clinical diagnostics, food safety, and environmental monitoring.
Dose distribution over the radiation fields and organs of the body during raditherapy procedures [abstract]
(2001-08) Roy, S.; Ambia, A.S.M.; Akter, S.; Banu, H.; Begum, M.
EFFECTS OF LEACHING ON THE PROPERTIES OF MORTAR
(Dept. of CE, CUET, 19-Dec-2018) Kuri, J.C.; Akter, S.; Choudhury, A.
Leaching of calcium and other ions from hydrates increases the porosity of cement based materials which has a negative effect on strength and durability. This study investigated the effects of leaching on the properties of mortar. Compressive strength and weight of the mortar and pH of leached water at different leaching periods were evaluated. The mortar specimens were subjected to tank leaching test where samples were exposed to demineralized water for 15, 30 and 90 days. The experimental results demonstrate that after leaching, the alkalinity of leached water increased due to the dissolution of calcium and other ions from mortar samples. Generally, for the first 30 days leaching there was no significant negative effect on the properties of mortar, rather leachant act as a curing medium. Due to the dissolution of hydration products, after 90 days leaching period, weight of the mortar specimen was decreased by 0.75% compared to without leaching sample. On the other hand, after 90 days leaching compressive strength of mortar increased by 72.60% compared to without leaching sample. In addition, after 90 days leaching period, compressive strength and weight decreased by 23.48% and 1.48% respectively compared to 30 days leached specimens.
Studies on Synthesis, Characterization, and Monitoring of Ag NPs for Power Production Using Tomato
(Springer Science and Business Media Deutschland GmbH, 2023-06-27) Islam, F.; Khan, K.A.; Hossain, M.S.; Rasel, S.R.; Akter, S.
In this research paper, tomato extract has been synthesized and characterized for Ag NPs. This synthesized Ag NPs have been used for power production. This produced Ag NPs using tomato extract are very useful and eco-friendly. Different characterizations have been conducted UV-visible spectroscopy, FTIR, XRD, and FESEM. It is found that the absorption peak at around 428 nm for UV-visible spectrum. It is also found that the biomolecule compounds were responsible for the reduction and capping material of silver nanoparticles using FTIR spectra. It is also found that the particles to be crystalline in nature by XRD study, with a face-centered cubic (FCC) structure. The power production activity of Ag NPs was assessed to find their potential use in electrochemical cell. It is found that the open circuit voltage (Voc), short circuit current (Isc), and maximum power (Pmax) were better for using Ag NPs from the tomato extract of a single electrochemical cell.
Studies on Synthesis, Characterization, and Monitoring of Ag NPs for Power Production Using Tomato
(Springer Science and Business Media Deutschland GmbH, 2023-06-27) Islam, F.,; Khan, K.A.,; Hossain, M.S.; Rasel, S.R.; Akter, S.
In this research paper, tomato extract has been synthesized and characterized for Ag NPs. This synthesized Ag NPs have been used for power production. This produced Ag NPs using tomato extract are very useful and eco-friendly. Different characterizations have been conducted UV-visible spectroscopy, FTIR, XRD, and FESEM. It is found that the absorption peak at around 428 nm for UV-visible spectrum. It is also found that the biomolecule compounds were responsible for the reduction and capping material of silver nanoparticles using FTIR spectra. It is also found that the particles to be crystalline in nature by XRD study, with a face-centered cubic (FCC) structure. The power production activity of Ag NPs was assessed to find their potential use in electrochemical cell. It is found that the open circuit voltage (Voc), short circuit current (Isc), and maximum power (Pmax) were better for using Ag NPs from the tomato extract of a single electrochemical cell.