Browsing by Author "Arifur Rahman, Md."

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A Cost Effective Regression Testing Approach for Web Application
(Department of Computer Science and Engineering, Military Institute of Science and Technology, 2012-12) Nahar Jesy, Sumsun; Raihan Majumder, Md.; Arifur Rahman, Md.
Regression testing is an expensive testing procedure utilized to validate modiﬁed software. Duringregressiontesting,amodiﬁedsystemisretestedusingtheexistingtestsuite. Because the size of the test suite may be very large, testers are interested in detecting faults in the systemasearlyaspossibleduringtheretestingprocess. Regressiontestselectiontechniques attempt to reduce the cost of regression testing by selecting a subset of a program’s existing testsuite. Inthispaperwehavebrieﬂydiscussedtwooftheselectiontechniquesandchoose the safe algorithm technique. The previous researches indicate that safe regression test selectioncanbecost-effective,butthatitscostsandbeneﬁtsvarywidelybasedonanumberof factors. Inordertocarrythroughtheregressiontestingquicklyandeffectively,wehaveproposed a regression testing approach from a large test suite using hybrid technique based on safeselectionalgorithmandprioritizationbasedoncostcriterion. Weexaminedsomeprioritizationstrategiesanddevelopourproposedalgorithmtoimprovetherateoffaultdetection for web applications. We propose a new hybrid regression testing approach that select less test cases and then prioritize them according to their cost, so that the regression testing for web application become more time effective and less expensive.
An Internship Report on Merchandising and Operation Process of Knit Concern Ltd.
(Daffodil International University, 2020-01-12) Arifur Rahman, Md.
The internship program is a pre-requisite for a postgraduate degree in MBA. A homeroom exchange alone cannot be a secret sacred in taking care of real business situations; In this way, it is an open door for Undertreat to collect data about the specialist's work area through this program. A report for college and association prerequisites must work. The main topic of the report is "Marketing and Operation Process of Knit Concern Limited." Case Concern Limited The initial inspiration for this report regarding Apparel and Fashions Limited has been very clear in the report. Knit Concern Limited is one of the premier gatherings of the Bangladesh Garments industry. With an enormous Processing Plant Here in this era Bangladesh is rich in the RMG region, where the department has great promise that the annual rental payments of the garment division are driven from two sources: one is a piece of clothing and the other is a piece of clothing. The company makes Gents shirts, pants, shirts, pants, and others Sea, like and for European countries. Clothing items to create a quality article using the cutting edge of the instruments. They additionally add new hardware to expand its generation line. An important aspect of them is to benefit from expansion. The clothing industry article maintains a decent relationship with the buyer. Their policy approach to dedication and duty support. The Merchandiser Group is quite productive and well-versed in their operations. Knit Concern Limited has another initiative, such as KNIT Concern Limited Washing, and has a sister concern named Cutting Edge Industries Limited and Cutting Edge Stream Saw LLC. The report is set up on "Merchandising and operation process." Enterprises at BD "where my focus is on customer satisfaction level, item quality, and RMG.
Environmental Impact Assessment of Semi-Intensive Shrimp Farms in the Coastal Regions of Bangladesh
(Chattogram Veterinary and Animal Sciences University Chattogram-4225, Bangladesh, 2020-06) Arifur Rahman, Md.
The study was performed to assess the environmental impact of shrimp farming on local ecosystem and adjacent community in relation to the country. It is assumed that shrimp farming has some negative consequences on the animal welfare, environment sustainability, people’s livelihood pattern and living conditions in coastal, rural and urban areas. At the same time shrimp industry not only brings economic velocity in national economy but also generates economic solvency to millions of people in country. However, the country cannot compete profitably in international market because of low productivity, poor farm management, proper land utilization and lack of hygiene practice throughout the production. This paper attempts to identify environmental changes due to shrimp farming activities on three selective shrimp farms of Shymanagar and Tekaf Upazila and their adjacent communities and areas. It was conducted based on several focus group discussion, multiple interviews, community meetings and laboratory analysis of soil for electrical conductivity measurement.
Finite difference scheme for mixed boundary values of two dimensional elastic problems with internal hole
(Department of Mechanical Engineering, 2005-10) Arifur Rahman, Md.; Md. Abdus Salam Akanda, Dr.
For abstract please see full text
Study on effectiveness of coastal BIO-SHILD for reduction of the energy of high frequency surges
(Department of Water Resources Engineering, 2014-03) Arifur Rahman, Md.; Mostafa Ali, Dr. Md.
Storm surges generated by cyclones can cause devastating damage of property and loss of life in coastal areas of Bangladesh. Bio-shield in wetlands can reduce the energy of storm surges and cyclones. In this study, historical storm surges are analyzed and existing bio-shield protection is evaluated along the coastal belt of Bangladesh. Moreover, a laboratory experiment has been carried out and the result of a numerical model has been used to study the effectiveness of coastal bio-shield in reducing the energy of high frequency surges. In this study, wind speed of 25 cyclones that hit the country from 1960 to 2007 has been analyzed and found that the wind speed of cyclonic storm surges increases by 0.83 km/h each year. But the human death toll caused by storm surges shows a decreasing rate of 500 people per year because of the present growing successful institutional arrangement for disaster management. It is also found that there are only 60 km or 6% of forest belts of the 957 km total length of embankment of 49 sea-facing polders, much of which is already degraded. To study the effectiveness of coastal bio-shield in reducing the energy of high frequency surges, a laboratory experiment is carried out in a 22 m long, 0.75 m wide and 0.75 m deep wave flume in the Hydraulics and River Engineering Laboratory of Bangladesh University of Engineering and Technology. Bio-shields are represented by cylindrical bamboo sticks as rigid bio-shield and polyethylene (Polyethylene is 75 times more flexible than bamboo sticks) as flexible bio-shield whose diameter is 6 mm. The densities of bio-shield are 780 and 390 sticks per square meter and the porosities are 0.9779 and 0.9889 for spacing 25 mm c/c and 50 mm c/c of bio-shields, respectively. It is found for emerged conditions of bio-shield that the maximum wave height reduction is 71 % for bio-shield spacing of 50 mm c/c and that for submerged condition of bio-shield is 52 % for spacing of 50 mm c/c. These reductions of wave heights occur when bio-shield of2 m width (1 m Rigid + 1 m Flexible) are placed at 4 m distance from the embankment for wave period of2.0 sec. Moreover, a two-dimensional numerical model named Bay of Bengal model developed by Institute of Water Modeling is used to simulate the effect of coastal bio-shield in reducing the energy of storm surge SIDR along the Kuakata beach of Bangladesh. In this modeling, four simulations are performed for four different conditions including 74 cm of SLR. Surge levels and current speeds are measured at three specific locations on the Kuakata beach (polder-48). The model results demonstrate that up to 2 cm of surge height and 0.48 mls or 62 % of current speed are reduced by 200 m width of bio-shield when SLR is not considered. Again, the surge height and current speed are reduced by 3 cm and 0.46 mls or 59 % respectively by 200 m width of bio-shield when 74 cm of SLR is considered for the year 2100 according to 5th IPCC report. It is anticipated that these results will find broad application in coastal management and planning for areas with existing coastal bio-shield as well as for bio-shield restoration and establishment efforts.