Volume 8, Number 1, June 2020 http://dspace.mist.ac.bd:8080/xmlui/handle/123456789/556 2026-04-26T00:20:36Z 2026-04-26T00:20:36Z Zaki, Tarannum Sultana, Zinia Rahman, S M Anisur Islam, Muhammad Nazrul http://dspace.mist.ac.bd:8080/xmlui/handle/123456789/561 2020-09-01T02:39:41Z 2020-06-01T00:00:00Z

Exploring and Comparing the Performance of Design Methods Used for Information Intensive Websites Zaki, Tarannum; Sultana, Zinia; Rahman, S M Anisur; Islam, Muhammad Nazrul At present, web applications are one of the most widely used software applications in different organizations. A website is a virtual representation of the structure of any organization. Good user experience of a website is highly dependent on the content organization or design of a website. Thus, the design is a very important factor to develop a high usability standard website. Different types of design techniques are used to develop different types of websites. It is a very challenging task to develop information-intensive websites using a suitable design technique so that the website can serve its intended purpose with enhanced usability and user experience. Therefore, the objective of this research is to compare the performance of two alternate design techniques fordeveloping an information-intensive website. To achieve this objective, the existing design techniques were explored; and selected the Card Sorting and Interactive Dialogue Model (IDM) techniques to design two websites for an orphanage system. Later, the developed orphanage web systemswereevaluated with ten participants through a user study;and found that the IDM design technique performsbetter than the Card Sorting technique in terms of the system’s usability and user experience.

2020-06-01T00:00:00Z Huq, Md. Habibul Rahman, Md. Mafizur http://dspace.mist.ac.bd:8080/xmlui/handle/123456789/560 2020-08-16T03:30:16Z 2020-06-01T00:00:00Z

Land-Use and Land-Cover Change in Dhaka Eastern Region and Its Impact on Surface Run-off Huq, Md. Habibul; Rahman, Md. Mafizur The aim of this study is to identifythe impending urbanization-led land-use and land-cover (LULC) change of Dhaka Eastern Region (DER) and assessing its impact on surface runoff. Remotely sensed image data and proposed land-use plans for DER isanalyzed and mapped in this study to detect the changes of LULC. A faster pace of land transformation was observed during2016-17from unpaved to the paved surface. Four post-developed LULC scenarios were predicted from the classified Landsat imagery of 2016-17with increasing imperviousness. Runoffwas estimated by SCS-CN method integrating RS and GIStools. LULC changes according to land cover classes were assimilated with the hydrologic soil groups and then runoff depths were estimated for annual rainfall events in DER. Like the slower trend of urbanization, area-weighted 퐶푁also increased slowly during2016-17but followed a moderate leap in RDP and scenario-1. However, 퐶푁dropped in scenario-2 mainly due to the change in land-cover by infilling of highly permeable hydrologic soils. Predicted scenario-3 and 4 resulted in higher 퐶푁respectively because of increasing imperviousness inLULC. Higher 퐶푁resulted in higher runoff and more drainage requirements. RDP scenario or the predicted scenario-1 with 퐶푁84is potentially a viable LULC option for DER by 2035 and beyond that may cause more than 30%to 50%runoff comparing tothe representative 2010 LULC condition.

2020-06-01T00:00:00Z Akhtaruzzaman, M. Sadakatul Bari, S. M. Hossain, Syed Akhter Rahman, Md. Mahbubur http://dspace.mist.ac.bd:8080/xmlui/handle/123456789/559 2020-08-16T03:24:45Z 2020-06-01T00:00:00Z

Link Budget Analysis in Designing a Web-application Tool for Military X-Band Satellite Communication Akhtaruzzaman, M.; Sadakatul Bari, S. M.; Hossain, Syed Akhter; Rahman, Md. Mahbubur In satellite communication, Link Budget analysis is the most important part todeterminegainsand lossesof signalsfrom the transmitter to the receiver. Most importantly, it investigates system performance and optimum power which must be received at the receiverchannel. In some cases, this information could be generated, saved for past data analysis, and share with peer users which are not found in existing web tools. Thus, it is obvious to design a newLink Budget calculator with users, database, and data retrieval support. This work focuses on designingaLink Budget web tool for X-band satellite communication through literaturestudy and comparative analysis. The X-Band calculatoris designed based on HTML, PHP, Javascript, and MySQLby ensuring several security issues, andcan be accessedthrough mobile devices.This paperalso focuseson the necessary equations of Link Budget forUplink (푇푥);Satellite;Downlink (푅푥); Azimuth, Elevation,Distance analysis; andRain attenuation. Though, comparative assessments among various web tools show some fluctuations, overall outputs show satisfactory results with small% of Errors (PoE) ensuringreliability and viability of the proposed X-Band tool for practical use.

2020-06-01T00:00:00Z Rahman, Hafizur Hoque, Nabila Sarker, Palash K. Safa, Ashrafus http://dspace.mist.ac.bd:8080/xmlui/handle/123456789/558 2020-08-16T03:18:37Z 2020-06-01T00:00:00Z

Assessment of Hexavalent Chromium Pollution in Buriganga and Dhaleshwari River Waterbodies Adjacent toTannery Estates in Bangladesh Rahman, Hafizur; Hoque, Nabila; Sarker, Palash K.; Safa, Ashrafus Recently, in Bangladesh, all tannery industries have beenrelocated to a new location exclusively established for leather processing industries with modern manufacturing facilities and effluent treatment plants with standard probations. Effluents generated from the tannery industries are now being disposed of into the surrounding river waterbodies. In this study, our goal was to investigate the presence of chemical contaminantslike hexavalent chromium (퐶푟6+) in the water bodies surrounding tannery industries and to understand the possible role played by the tannery effluents in contaminating the river waterbodies with 퐶푟6+. Result analysis revealed the presence of an amount of 퐶푟6+(ranging from 0.01푚푔/퐿to 3.54푚푔/퐿) in the surrounding water bodies, which was far above the maximum permissible limit of 퐶푟6+(0.05푚푔/퐿for surface water), set by the Environmental Protection Agency. It is, therefore, plausible to assume that effluents from the tanneries play an important role in hexavalentchromium contamination of water bodies surrounding tannery industries.

2020-06-01T00:00:00Z