Northern University of Bangladesh

www.nub.ac.bd
Dhaka, Bangladesh
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Sabab S.A.,Northern University of Bangladesh | Ashmafee Md.H.,Bangladesh University of Business and Technology
19th International Conference on Computer and Information Technology, ICCIT 2016 | Year: 2016

In the real world, books and documents are the sources of knowledge. But this knowledge is only bounded to people with clear vision. Our society includes a group of people who does not have a clear vision or people who are blind. For this group, world is like a black illusion. The shape and structure's information of an object is unavailable to them let alone reading a document. For blind acquiring knowledge by reading documents is cumbersome. Braille is one of the methods which is used to read a book or document. In this method, any document has to be converted to braille format to become understandable to a blind. The problem arises due to the fact that, this is an expensive procedure and many times not available. The solution is rather simple, introduce a smart device with a multimodal system that can convert any document to the interpreted form to a blind. A blind can read document only by tapping words which is then audibly presented through text to speech engine. "Blind Reader" - developed for touch devices which is user friendly and effective interactive system for visionless or low vision people. © 2016 IEEE.


Al Nayeem A.,Khulna University | Khatun A.,Manarat International University | Rahman M.S.,Khulna University | Rahman M.,Northern University of Bangladesh
Journal of Pharmacognosy and Phytotherapy | Year: 2011

The ethanol extract of the dried leaves of Mikania cordata (Family-Asteraceae) was investigated for its possible bioactive chemical groups and antinociceptive, cytotoxic and antibacterial activities in animal models. The extract produced significant writhing inhibition in acetic acid-induced writhing in mice at the oral dose of 125 and 250 mg/kg body weight (p<0.001) comparable to the standard drug diclofenac sodium at the dose of 25 mg/kg of body weight. The crude extract produced the moderate cytotoxic activity against brine shrimp Artemia salina (LC50=90 and LC90=166 μg/ml). The extract showed antibacterial activity against some types of microorganisms upon which the extract was employed. The obtained results provide a support for the use of this plant in traditional medicine and its further investigation. © 2011 Academic Journals.


Rahman A.,Northern University of Bangladesh | Arnob S.I.C.,WASO Engineers and Consultants BD Ltd.
2016 3rd International Conference on Electrical Engineering and Information and Communication Technology, iCEEiCT 2016 | Year: 2017

Due to ever growing population, the electricity demand is continuously increasing in Dhaka city. Electricity demand is influenced by a number of factors such as number of customers, customer behavior, working hours, weather, weekday-weekend, holidays etc. In order to reduce future energy consumption by city-dwellers, understanding the patterns of present electricity consumption is necessary. By taking the reading of individual load consumption in real time for 24 hours, the load curve can be generated. However, due to wide diversity of customers, a statistical methodology needs to be followed for the preparation of aggregated load curves. By doing a survey on number of domestic users filling out a questionnaire, a prediction of domestic load curve has been obtained. Analysis of these load curves provides an understanding about the behavior of residential users in different time and day. Results have been verified with feeder data of corresponding substation. © 2016 IEEE.


Akter S.,Northern University of Bangladesh | Aziz M.T.,Software Engineer
2016 3rd International Conference on Electrical Engineering and Information and Communication Technology, iCEEiCT 2016 | Year: 2017

Internet is one of the primary sources of Big Data. Rise of the social networking platforms are creating enormous amount of data in every second where human emotions are constantly expressed in real-time. The sentiment behind each post, comments, likes can be found using opinion mining. It is possible to determine business values from these objects and events if sentiment analysis is done on the huge amount of data. Here, we have chosen FOODBANK which is a very popular Facebook group in Bangladesh; to analyze sentiment of the data to find out their market values. © 2016 IEEE.


Mahbuba D.,Northern University of Bangladesh | Mahbuba D.,University of Antwerp | Rousseau R.,University of Antwerp | Rousseau R.,Catholic University of Leuven
Scientometrics | Year: 2013

We propose new variations of the standard and the real-valued (or interpolated) h-index. More precisely, we propose two different types. For the first type, sources are years, and items are either publications, or citations received or citations per publication. The second type makes use of the speed by which citations are received: it is a diffusion speed index. © 2012 Akadémiai Kiadó, Budapest, Hungary.


Ul Masood M.R.,Northern University of Bangladesh
16th Int'l Conf. Computer and Information Technology, ICCIT 2013 | Year: 2014

The requirement of Bangla character recognition has become one of the prime attentions among the current researchers due to the increase of automated systems and usage of hand held devices. This paper presents a novel approach to recognize handwritten bangla numerals and addresses a robust feature extraction scheme that spawns 23-dimensional features based on the numeral's structure and topology. The recognition scheme is organized with a proposed decision tree that has been justified using entropy calculation. Considering inconsistency in individuals' writing style and the presence of significant curves and loops, the proposed feature extraction method restricts to less dimensional features of each numeral from 14600 data samples. The recognition time of this scheme is much lower than the existing procedures, since the preprocessing tasks have been performed during down sampling operation. The quick response time 13.04 ms and the higher accuracy (96.82%) explore a new era for the proposed scheme of being implemented in Bangla numeral LeadPad toys. © 2014 IEEE.


Sadeque S.,Simon Fraser University | Ahmed I.,Northern University of Bangladesh | Vaughan R.,Simon Fraser University
Canadian Conference on Electrical and Computer Engineering | Year: 2011

This paper deals with the sub-carrier and bit allocations for multi-user orthogonal frequency division multiplexing (OFDM) systems by a modified particle swarm optimization (MPSO) method for a specific bit error rate (BER). The resources (subcarriers and the number of bits per symbol per subcarrier) are allocated according to the instantaneous channel state information (CSI) which is assumed to be perfect and available with no latency and at no cost. To allocate the resources, we optimize total transmit power and throughput simultaneously with MPSO for a multi-user OFDM system. Simulation results show that for a large number of users, the MPSO performs better than existing algorithms, and that joint optimization (margin adaptive and rate adaptive) converges quickly. © 2011 IEEE.


Ahmed I.,Northern University of Bangladesh | Sadeque S.,Simon Fraser University | Pervin S.,University of Dhaka
CONIELECOMP 2011 - 21st International Conference on Electronics Communications and Computers, Proceedings | Year: 2011

Like many wireless systems, Orthogonal Frequency Division Multiplexing (OFDM) needs proper allocation of limited resources such as total transmit power and available frequency bandwidth among the users to meet their service requirements. In this paper, different versions of two evolutionary approaches, Differential Evolution (DE) and Particle Swarm Optimization (PSO) have been applied for adaptive sub-carrier and bit allocations to minimize the overall transmit power of a multiuser OFDM system. Each user will be assigned a number of sub-carriers with at least one minimum sub-carrier even at the worst case. Then the number of bits and the transmit power level for each user are calculated to obtain the optimum requirements. Simulation results show that both the approaches outperform the conventional static and many other dynamic resource allocation schemes in multi-user scenario. The results also reveal that the employed two different schemes of DE show better performances than the original and modified versions of PSO. © 2011 IEEE.


Khatun A.,Manarat International University | Rahman M.,Northern University of Bangladesh | Jahan S.,Manarat International University
Oriental Pharmacy and Experimental Medicine | Year: 2014

The methanol extract of leaves of traditionally used medicinal plant Murraya exotica Linn. (Family: Rutaceae) was evaluated for possible cytotoxic, thrombolytic and antioxidant activities in this study. The extract was tested for phytochemical group test by standard method using chromogenic reagents, in vivo brine shrimp lethality assay using Artemia salina, thrombolytic effect by using the standard streptokinase and antioxidant activity by using 2,2-diphenyl-1-picryl-hydrazyl (DPPH). The study revealed the presence of reducing sugars, tannins, saponins and alkaloids. The extract showed statistically significant (p < 0.01) potent cytotoxic effect in brine shrimp lethality bioassay where the value of LC50 and LC90 were 1.27 μg/ml and 5.09 μg/ml respectively compared with the standard vincristine sulphate with the value of LC50 and LC90 0.09 μg/ml and 4.83 μg/ml respectively after 24 h. The study gave a significant indication to the use of the plant extract as a potential source for cytotoxic compounds. The extract showed mild thrombolytic effect of 15.78 % thrombolytic activity whereas the standard streptokinase showed 76.50 ± 0.82 %. In the antioxidant activity study, the extract showed free radical scavenging activity where IC50 = 1.25 μg/ml and IC90 = 4.4 μg/ml, compared with the standard ascorbic acid showing IC50 = 0.01 μg/ml and IC90 = 3.58 μg/ml. Based on the findings of phytochemical, toxicological and anti-oxidative activity, it is evident that the plant may contain some novel compounds that possess potent anti-mutagenic and anti-oxidative activities. The obtained results support the use of this plant in traditional medicine. © 2014 Institute of Korean Medicine, Kyung Hee University.


Parvin A.,Northern University of Bangladesh
Journal of Internet Banking and Commerce | Year: 2013

Banks are playing very vital role for the economic development of a country. In this paper the picture of existing operation of mobile banking service as well as the future of this has been depicted. This is almost a descriptive study that has used both primary and secondary data. The result is showing that almost all the banks are trying to adopt mobile banking to make their customers satisfied and be advance in their world where the common services are account opening, account balance query, fund transfer and PIN related service. All the operators of mobile phone in Bangladesh have started to be involved at a greater extent in this regard. And from the viewpoint of the customers the study has inferred they are satisfied with the very few services that new banking system is giving and as a consequence the future of banking business will be brighter day by day. This paper will contribute a lot to the banks of Bangladesh for better service giving and make customers more concern to avail mobile banking service. © Afroza Parvin, 2013.

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