Bangladesh Institute of Technology

Chittagong, Bangladesh

Bangladesh Institute of Technology

Chittagong, Bangladesh
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Rahman M.M.,Bangladesh Institute of Technology
1st International Conference on Medical Engineering, Health Informatics and Technology, MediTec 2016 | Year: 2016

Several segmentation methods have been presented for breast ultrasound (BUS) images. Unfortunately most of them are supervised and semi-automatic in nature. In this paper, a complete unsupervised algorithm for BUS image segmentation algorithm using local intensity and texture histograms features has been proposed. The texture and intensity features are combined in the clustering process. Initially the image is filtered using a texture preserving de-noising filter. A new texture feature is extracted from the filtered image. Using these features, employing a non-parametric Bayesian clustering method, image is segmented. This clustering is completely unsupervised in nature as no seeding or learning is required for this algorithm. Qualitative and quantitative segmentation results of images from BUS image databases prove the competitiveness of the proposed algorithm. © 2016 IEEE.

Hoq M.E.,Bangladesh Institute of Technology
Malaysian Forester | Year: 2016

The Sundarbans mangrove forest of Bangladesh, a World Heritage site, is unique for its productivity and significance in balancing the local ecosystem. However, its biodiversity continues to be threatened by a growing human population that not only places pressure on its biological resources, but also impacts on the freshwater inflows from upstream areas. The suitable area of the two dominant tree species- Heritiera fomes and Excoecaria agallocha will decrease significantly by the year 2050 due to sea level rise as compared to the year 2001. On the other hand, fisheries production has reduced by 56% in last four decades and the trend is slightly higher in the east (59%) compared to the west (56%). Considering the high biodiversity value of the Sundarbans, some parts of the forest zone have been declared as protected areas. With rising sea levels and the increasing salinity in the water and soil has severely threatened the health of mangrove forests and the quality of soil and crops. Additionally, there have been serious disturbances to hydrological parameters and change in fishing patterns, resulting in disastrous consequences for fishermen. Although historically, the management approach for the Sundarbans focused principally on the revenue generation from the forest through systematic management, new paradigm of management should look forward considering the potential impacts of climate change, ecological integrity, sustainable harvesting and ensuring continuity of the ecosystem services of the Sundarbans for next generations of human as well as the ecosystem itself.

Muktadir M.S.,Bangladesh Institute of Technology
2016 3rd International Conference on Electrical Engineering and Information and Communication Technology, iCEEiCT 2016 | Year: 2017

Spray pyrolysis technique confers a spontaneous way to deposit thin film on flexible substrates with minimum consumption of desired material simply by adding it with the spray solution. The constituent units of the simplified spray pyrolysis technique are spray-dry chamber, a temperature controlling unit, a spray-dry controlling unit and an exhaust gas emission unit. The aim of this work is to simplify the fabrication method of the system and minimize the cost. On this regard, a handmade wooden chamber, an electrical heater with temperature controller and exhaust fans are used in this system which are available in local market. A servo motor interfaced with a microcontroller and a LCD display is used for the spray-dry unit where the time is set by using a matrix keyboard. Eventually, Zinc Oxide thin film is obtained on a glass substrate by using this system and its optical property is observed in a Spectrophotometer after completing the fabrication of the system. An easy fabrication process with the user friendly equipment make this system simple, easy to handle and maintain with less mechanical hazards. © 2016 IEEE.

Amin M.T.,Bangladesh Institute of Technology
2016 3rd International Conference on Electrical Engineering and Information and Communication Technology, iCEEiCT 2016 | Year: 2017

This paper describes the LC tank design for low phase noise LC VCO on the selection of passive elements. LC tank based VCO is commonly used for the low phase noise performance in most RF applications. Since quality factor of the LC tank is mainly dominated by the quality factor of the passive elements (inductor & capacitor) selection, this work presents the passive elements optimization based on the inductor and varactor optimization. Simulated in 65 nm process, higher Q is obtained for large width and minimum number of turns for the inductor and for the varactor design; the PMOS varactor operating in the depletion and accumulation regions allows large tuning range and less parasitic resistance. © 2016 IEEE.

Fakruddin M.,Bangladesh Institute of Technology | Hossain Z.,Bangladesh Institute of Technology | Afroz H.,Primeasia University
Journal of Nanobiotechnology | Year: 2012

Background: Nanobiotechnology is the application of nanotechnology in biological fields. Nanotechnology is a multidisciplinary field that currently recruits approach, technology and facility available in conventional as well as advanced avenues of engineering, physics, chemistry and biology.Method: A comprehensive review of the literature on the principles, limitations, challenges, improvements and applications of nanotechnology in medical science was performed.Results: Nanobiotechnology has multitude of potentials for advancing medical science thereby improving health care practices around the world. Many novel nanoparticles and nanodevices are expected to be used, with an enormous positive impact on human health. While true clinical applications of nanotechnology are still practically inexistent, a significant number of promising medical projects are in an advanced experimental stage. Implementation of nanotechnology in medicine and physiology means that mechanisms and devices are so technically designed that they can interact with sub-cellular (i.e. molecular) levels of the body with a high degree of specificity. Thus therapeutic efficacy can be achieved to maximum with minimal side effects by means of the targeted cell or tissue-specific clinical intervention.Conclusion: More detailed research and careful clinical trials are still required to introduce diverse components of nanobiotechnology in random clinical applications with success. Ethical and moral concerns also need to be addressed in parallel with the new developments. © 2012 Fakruddin et al.; licensee BioMed Central Ltd.

Khan M.A.,Bangladesh Institute of Technology | Hossain M.U.,Mawlana Bhashani Science and Technology University | Rakib-Uz-Zaman S.M.,Shahjalal University of Science and Technology | Morshed M.N.,Bangladesh Institute of Technology
Scandinavian Journal of Immunology | Year: 2015

Ebola viruses (EBOVs) have been identified as an emerging threat in recent year as it causes severe haemorrhagic fever in human. Epitope-based vaccine design for EBOVs remains a top priority because a mere progress has been made in this regard. Another reason is the lack of antiviral drug and licensed vaccine although there is a severe outbreak in Central Africa. In this study, we aimed to design an epitope-based vaccine that can trigger a significant immune response as well as to prognosticate inhibitor that can bind with potential drug target sites using various immunoinformatics and docking simulation tools. The capacity to induce both humoral and cell-mediated immunity by T cell and B cell was checked for the selected protein. The peptide region spanning 9 amino acids from 42 to 50 and the sequence TLASIGTAF were found as the most potential B and T cell epitopes, respectively. This peptide could interact with 12 HLAs and showed high population coverage up to 80.99%. Using molecular docking, the epitope was further appraised for binding against HLA molecules to verify the binding cleft interaction. In addition with this, the allergenicity of the epitopes was also evaluated. In the post-therapeutic strategy, docking study of predicted 3D structure identified suitable therapeutic inhibitor against targeted protein. However, this computational epitope-based peptide vaccine designing and target site prediction against EBOVs open up a new horizon which may be the prospective way in Ebola viruses research; the results require validation by in vitro and in vivo experiments. © 2015 John Wiley & Sons Ltd.

Ahiduzzaman M.,Bangladesh Institute of Technology | Islam A.K.M.S.,Islamic University of Technology
Renewable and Sustainable Energy Reviews | Year: 2011

Bangladesh is an energy starving country. The country will be on one of the fast growing power markets with its population and growing energy demand per person, its fast growing urbanization, and its socio-economic development. At present the potential demand of power is 5569 MW and the supply is below 4000 MW. The country is dependent on the imported petroleum that is big burden on the economy. The per capita emission is only 0.2667 tonne per person still much below the world leading countries (19.8 tonne per person for USA). However, Bangladesh is one of the most vulnerable to climate change effect in the world. In this regard, renewable energy resources appear to be the one of the most efficient and effective solution for clean and sustainable energy development in Bangladesh. Biomass is the dominating source of energy in Bangladesh. Biomass energy is used in a very traditional way. Biomass conversion to energy in the form of liquid, gaseous and solid pellet or briquette could be a viable option to reduce the pressure on the conventional fossil fuel. The geographical location of Bangladesh has several advantages for extensive use of grid connected solar electricity and stand alone solar PV system. This article presents a review of the potential and utilization of the renewable energy sources in Bangladesh. © 2011 Elsevier Ltd. All rights reserved.

Sanjidah S.,Bangladesh Institute of Technology
2nd International Conference on Electrical Engineering and Information and Communication Technology, iCEEiCT 2015 | Year: 2015

A framework for analyzing the effect of a non uniform source/drain (S/D) doping profile on triangular tri-gate FinFET considering the compact modeling is presented. This paper demonstrates a fully physical model for triangular tri-gate leakage distribution due to variation of S/D doping. Fixed S/D doping can remarkably suppress short channel effect which is responsible for sub-threshold conduction. The proposed model predicts that the non uniform doping increases short channel effect as well as sub-threshold conduction and due to which a large increase in leakage current is obtained. We also investigated the impact of S/D doping on geometrical parameters such as fin height and fin width. Using Monte Carlo simulation a random variation of leakage current associated with parameter variation can be found that also predicts the dependency of leakage current on threshold voltage. © 2015 IEEE.

Fakruddin M.,Bangladesh Institute of Technology | Chowdhury A.,Bangladesh Institute of Technology
American Journal of Biochemistry and Biotechnology | Year: 2012

Problem statement: Pyrosequencing has the potential to rapidly and reliably sequence DNA taking advantages over traditional Sanger di-deoxy sequencing approach. Approach: A comprehensive review of the literature on the principles, applications, challenges and prospects of pyrosequencing was performed. Results: Pyrosequencing is a DNA sequencing technology based on the sequencing-by-synthesis principle. It employs a series of four enzymes to accurately detect nucleic acid sequences during the synthesis. Pyrosequencing has the potential advantages of accuracy, flexibility, parallel processing and can be easily automated. Furthermore, the technique dispenses with the need for labeled primers, labeled nucleotides and gel-electrophoresis. Pyrosequencing has opened up new possibilities for performing sequence-based DNA analysis. The method has been proven highly suitable for single nucleotide polymorphism analysis and sequencing of short stretches of DNA. Pyrosequencing has been successful for both confirmatory sequencing and de novo sequencing. By increasing the read length to higher scores and by shortening the sequence reaction time per base calling, pyrosequencing may take over many broad areas of DNA sequencing applications as the trend is directed to analysis of fewer amounts of specimens and large-scale settings, with higher throughput and lower cost. Conclusion/Recommendations: The Competitiveness of pyrosequencing with other sequencing methods will be improved in future. © 2012 Science Publications.

Islam M.N.,Bangladesh Institute of Technology
2015 18th International Conference on Computer and Information Technology, ICCIT 2015 | Year: 2015

Web interface signs such as navigation links, command buttons, thumbnails, small images, and icons are crucial elements of web user interfaces, which act as a communication artifact between the computer and the human (user). In other words, users interact with a web interface via interface signs. Designing intuitive interface sign become essential to make an effective human-computer interaction (HCI). But, a very limited HCI research has been focused on interface sign to design them intuitive for end users. In this paper, an extensive empirical user study was carried out through semi-structured interviews. The study found a set of underlying features for HCI practitioners to design intuitive interface signs in order to construct web interfaces intuitive for end users. © 2015 IEEE.

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