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Search Results: 1 - 10 of 782909 matches for " A.B.M. Sultan "
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A Framework of Genetic Algorithm Improvement for Optimal Block Division in Lining Layout Planning
I.M. Badarudin,A.B.M. Sultan,M.N. Sulaiman,A. Mamat
Journal of Artificial Intelligence , 2012,
Abstract: This study focuses on the Genetic Algorithm (GA) as solution strategy for block division in Lining Layout Planning (LLP). Block division is optimal when the combined shapes in an area promote no empty space. This problem requires huge number of possible solutions to be analyzed and it is considered as a set of space allocation problems. Classical Genetic Algorithm (CGA) with basic operators was applied to find optimal solution. Despite CGA is able to promote the optimal result however it has opportunity to improve time efficiency. Therefore, a framework of GA improvement (IGA) for block division was introduced by looking into the genes of chromosome for problem representation and prior to the processes of crossover and mutation. The IGA involves three strategies which are; (1) specific random value for chromosome representation, (2) deterministic crossover is to avoid from the same result of crossover process and (3) deterministic mutation is to protect overlapping shapes. This paper reported the theoretical analysis of possible improvements and then generates results from the various coordinates of areas to evaluate the performance of the CGA and IGA. The overall result presents that IGA promoted fewer number of repetitions than CGA and as a result IGA expedites processing time to obtain optimal result.
Diversity of Fishes of Mahananda River at Chapai Nawabgonj District
A.B.M. Mohsin,Emdadul Haque
Research Journal of Biological Sciences , 2012,
Abstract: The diversity of fish fauna of the Mahananda river at Chapai Nawabganj Sadar upazilla has been studied from the period of October, 2006 to November, 2007. The aim of the study was to find out the open water fish diversity in Mohananda River of Chapai Nawabgonj. About 56 fish species were found and identified during the investigation under 9 orders, 20 families and 42 genera. Among 56 species, 20 species were found under the order Cypriniformes, 17 species were found under the order Siluriformes, 10 species were found under the order perciformes, 3 species were found under the order Clupeiformes, 2 species were found under the order Channiformes and a single species was found under the order Synbranchiformes, Tetraodontiformes, Beloniformes and Cyprinodontiformes each. During the entire period of the study, only 19 endangered fish species were found from the study point. Among exotic carps, only Hypophthalmichthys molitrix was found during the study period in the river Mohananda.
Effect of Constraints on Carp Production at Rajshahi District, Bangladesh
A.B.M. Mohsin,Emdadul Haque
Journal of Fisheries International , 2012,
Abstract: This study was conducted for 1 year from January to December, 2007 under the department of fisheries, Rajshahi University, Bangladesh with and aim to find out the constraints of carp production. It deserved from the study that among many problems financial crisis is the prime issue to the carp farmers. About 34% farmers consider it as a main problem of carp culture, which is quite normal as most of the fisher-folk of Bangladesh are very poor. Then, seed problem, feed problem, fish poaching, lack of sufficient water in ponds, disease problems, pond poisoning problems are facing by the 25, 14, 11, 6, 4, 4 and 2% farmers, respectively. Somewhere, ownership problems are also present. Besides, another important issue is technological adoption of the carp farmers. No one is present who follow all the recommended technological facts completely for carp culture. From the study, it is found that dyke repair, removal of weed fish, liming, manuring, maintain proper stocking density, health monitoring, pH test, DO test, turbidity test, supplementary feeding etc. are done by the 56, 83, 70, 66, 31, 5, 2, 2, 35 and 80% farmers, respectively. So the water quality and environment is not maintained to grow the fish properly. Moreover fishes do not get proper nutrient rich feed. Illiteracy is one of the serious problems of carp farmers. A clear deviation is found in carp production from educated farmer (5670 kg ha-1) and illiterate farmer (3250 kg ha-1). All the above mentioned factors all together are hindering the carp culture of Rajshahi.
Carp Culture: Cost-return and Profit Analysis of Rajshahi District, Bangladesh
Nazrul Islam,Emdadul Haque,A.B.M. Mohsin
Journal of Fisheries International , 2012,
Abstract: Carps are being cultured in Rajshahi District in several forms like, in nursery pond, in rearing pond, in grow-out pond and recently in Beels. A research was designed on the polycutlure of both native and exotic major carps concerning the total cost involved and total return obtained with an objective to find out the profit status of carp culture in Rajshahi region. In this study, a clear relation is found between the total investment cost and total return. Maximum cost was found to be involved in nursery pond and minimum cost in Beel Mail as 223,052.00 and 3417.00 taka ha 1, respectively. Similarly, total return was also come from nursery pond culture system and minimum return from Beel Mail as 475,500.00 and 4030.00 taka ha 1, respectively. But the rate of profit in contrast of investment was found maximum in case of grow-out pond and minimum in Beel Mail as, 154 and 17%, respectively. However, the profit percentage of different pond culture system is more or less similar but significantly different from in Beel culture system.
Ultrasound Beam Focusing Considering the Cutaneous Fat Layer Effects
A.B.M. Aowlad Hossain,Laehoon H. Kang
International Journal Bioautomation , 2012,
Abstract: Commercial medical ultrasound scanners assume average sound velocity of 1540 m/s while sound speed varies at different tissues. This assumption limits focusing quality and degrades contrast and resolution, particularly for patients with fatty abdominal wall. This paper presents a simple two layer model to demonstrate the effect of ultrasound beam focusing quality in inhomogeneous medium based on Huygens's principle. A time delay function for ultrasonic phase array has been derived using in vivo information of fat layer and considering refraction in the interface of two layers. Simulated beam pattern and corresponding beam profiles at the focal depth using conventional delay time and that for proposed two layer model are compared. An experimental setup was designed to assess the image quality using a commercial ultrasound scanner and a phantom of two layers with different sound velocity. Simulated and experimental results indicate that obtained images using time delays for two layer model show better contrast resolution.
四倍体小麦中黑麦B组染色体的细胞特性与遗传效应
A.B.M.Mamun,Hossain,杨健
麦类作物学报 , 1993, DOI: 10.7606/j.issn.1009-1041.1993.01.005
Abstract: 本文对携带有黑麦B组染色体的四倍体小麦(TriticumdurumDesf)的细胞遗传效应进行了研究,并与六倍体小麦(T.aestivum)相同数量的同源B组染色体进行了比较。携带有黑麦B组染色体的四倍体小麦在A组染色体减数分裂过程中产生严重的畸形。它们通过减少环状二价染色体和增加棒状二价、单价染色体的频率而使细胞中交叉染色体的频率显著降低。在细胞分裂中期Ⅰ,单价染色体频率的提高还导致细胞分裂后期Ⅰ和二分体与四分体微核形成的滞后现象。携带有单一B染色体的植株的授粉和结实性明显降低,对籽粒性状也有显著的负效应。B组染色体对植株营养体发育的大多数形态性状具有强烈的正效应。B组染色体在四倍体小麦中较在六倍体小麦中表现出更为明显的细胞遗传特性,可能与前者缺乏D组染色体有关。
Comparative Studies on the Effect of Sowing Dates and Spacing on the Growth and Yield of Okra in Different Years
A.B.M. Sharif Hossain A. Wahab,Justus M. Onguso
Journal of Biological Sciences , 2003,
Abstract: Field studies were carried out to evaluate the effect of sowing time and spacing on the growth and fruit yield of okra in 1999 and 2000 in the farmer = s field, Lakshmipur, Bangladesh. The highest plant height was recorded 87.5 cm when okra was sown on 5 March, 2000 at the spacing of 45 x 45 cm and the lowest height was 73.3 cm when okra was sown on 20 May, 1999 at the spacing of 35 x 40 cm. The maximum number of leaves per plant was observed when it was sown on 5 March 2000 and the minimum was when sown on 20 May, 1999. Moreover, the fruit yield, number of fruit picking per plant, fruit length and weight per fruit were higher when okra was sown on 5 March, 5 April and 5 May, 2000 spaced at 45 x 45 cm than when okra was sown on 20 March, 20 April and 20 May, 1999 spaced at 35 x 40 cm. The highest number of percent mosaic infected plant was counted when okra was sown on 20 May, 1999 at the spacing of 35 x 40 cm and the lowest was when okra was sown on 5 March, 2000 at the spacing of 45 x 45 cm. In addition to that the highest number of vector of okra mosaic disease was counted when okra was sown on 20 May, 1999 at the spacing of 35 x 40 cm and the lowest was when okra was sown on 5 March, 2000 at the spacing of 45 x 45 cm. Percent mosaic infected plants was highest in 1999 and the lowest was in 2000 when it was sown on 20 May and 5 March due to the presence of the number of vectors of okra mosaic disease.
Effect of Selection for Growth on Production Performance in Black Bengal Goats
F. Akhtar,A.B.M.M. Islam,M.R. Amin
Pakistan Journal of Biological Sciences , 2006,
Abstract: Selection for growth at 6 months of age in Black Bengal goats was practiced to improve the growth and production performance. Selection was done for three generations. Two groups were maintained simultaneously, selected group and control group. The birth weight of selected group (0.98 kg) was significantly (p<0.01) higher than the control group (0.85 kg). Body weights in selected group at 3, 6, 9, 12 months were 4.85, 8.11, 10.68 and 15.49 kg and that of control group were 4.36, 6.86, 9.76 and 13.52 kg, respectively having significant differences (p<0.05). The reproductive performance and survivability were also studied to predict the extent of correlated response on them as a result of selection for growth. Age at first service was 281 days in selected line and that of random bred was 265 days. The weight at first service were 10.96 and 9.32 kg, respectively in selected and control lines. The number of service per conception of two groups were 1.17 and 1.19, respectively in selected and control does. Litter size of goats was 2.10 and 1.93 in selected and control lines, respectively. The kidding interval in selected does was lower (233.47 days) than that of random bred (274.60 days). The litter weight in selected and control kids were 1.62 and 1.42 kg, respectively. The pre-weaning kid survivability (%) of selected and control lines upto 60 days were 87.4 and 89.3, respectively. From the results, it was concluded that selection for growth at 6 months in Black Bengal goats substantially improved growth efficiency and production performance without affecting fertility and fitness.
Effect of harvesting and storage conditions on the post harvest quality of tomato (Lycopersicon esculentum Mill) cv. Roma VF
K.M. Moneruzzaman,A.B.M S. Hossain,W. Sani,M. Saifuddin
Australian Journal of Crop Science , 2009,
Abstract: The study was conducted to undertake the effect of harvesting stage and storage conditions on the post harvest quality of tomato cv. Roma VF (Lycopersicon esculentum Mill) during the process of ripening in storage. Fruit of three maturity stages such as mature green (mature but green in color), half ripen (breaker stage when fruit turns to yellow) and full ripen (yellow and soft, edible stage) were kept under three different conditions; open condition (control), covering with white polythene and finally treatment by CaC2+ polythene. High and significant variation was observed in quality characteristics under different harvesting stages, storage conditions and their combinations. The highest value for rotting and total sugar content was distinguished in full ripens tomato. The highest weight loss and shelf life was measured in mature green. The half ripen tomato showed the highest value of vitamin C and titrable acidity. The percentage of decay (rotting) and weight loss, pH, titrable acidity and total sugar were increased with gradual increasing of storage time, irrespective to maturity stages while the percentage of vitamin C was decreased with progressing time of storage. The highest value of weight loss, shelf life and titrable acidity was recorded in control treatment. The high decay (rotting percent) and total sugar content was recorded under CaC2+ polythene covering treatment while the highest vitamin C content and pH was measured in simple polythene covering treatment at the final observation day (15th day). The values of all parameters except for vitamin C were increased gradually with the exceeding of storage time irrespective to storage condition. Tomato plants placed under CaC2+ treatment, covered with polythene have shown the highest decay, titrable acidity and total sugar content at the final observation day.
Sequential Pathological and Immunohistochemical Study of Pullorum Disease in Experimentally Infected Chicks
A.B.M. Shahinuzzaman,A.K. Saha,A.C. Mazumder,S. Das
International Journal of Poultry Science , 2011,
Abstract: The research work was conducted to study the sequential pathological changes of Pullorum Disease (PD) and immunohistochemical detection of its causal agent (Salmonella pullorum) in various tissues of experimentally infected chicks. Total 40 day old (D0) chicks were divided into experimental and control groups. The chicks were infected at day 15 (D15) of age by oral route with 1 ml of 2 x 108 CFU of S. pullorum. Chicks were sacrificed at day 1 (D1), day 3 (D3), day 5 (D5), day 7 (D7) and day 9 (D9) of Post Infection (PI) and observed the remarkable gross lesions in liver, lung, heart and cecum. Grossly, liver found fragile (40%) at D7 and D9. Cheesy materials in cecum (20%) showed at D9. The highest reisolation of S. pullorum demonstrated in cecum (68%). Histopathologically, nodular lesion in liver developed at D7 (20%) and D9 (40%). Hepatitis from D1 (20%) and continued upto D9 (60%). Pneumonia and bronchopneumonia along with inflammatory cells in lung were observed at D1 (20%) that continued upto D9 (80%). Spleen showed depletion of lymphocytes at D7 (40%) and D9 (60%). Typhlitis in cecum noticed at D5 (20%) and remained up to at D9 (40%). Congestion and hemorrhage was common in organs at early times and gradually reduced both in grossly and histopathologically thereafter. Immunohistochemistry revealed S. pullorum bacteria in the cytoplasm of hepatocytes of liver, in the cytoplasm of epithelia of cecum (D3, D7) and in the cytoplasm of epithelia of crop (D3).
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