University of Liberal Arts Bangladesh
Dhaka, Bangladesh

University of Liberal Arts Bangladesh is a Private liberal arts-based University in Dhanmondi, Dhaka, Bangladesh. Founded in February 2002, permission to open was received from the University Grants Commission of Bangladesh in November 2003, pursuant to the Private University Act 1992. ULAB incorporates the values of Liberal Arts and Sustainability into its curricula, through its General Education Department and its Center for sustainable development . ULAB is a research-intensive University, with multiple research opportunities for its faculty members and students. Wikipedia.

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Ali M.S.,University of Liberal Arts Bangladesh | Ali K.,University of Liberal Arts Bangladesh
IWCI 2016 - 2016 International Workshop on Computational Intelligence | Year: 2016

A flexible planar textile antenna suitable for wearable applications has been designed at 2.4GHz. The effects of the dielectric substrates of the micro strip antenna have been investigated. Such materials are: fleece, denim and Velcro. Both edge mounted and vertical mounted excitation configurations are considered. It is observed that for edge mount, micro strip line feeding, antenna with fleece provides highest gain (7.59dBi). However the impedance bandwidth with the same feeding is higher for the antennas with denim substrate (25%). Moreover the impedance bandwidth can be enhanced (36%) by using vertical feed. The numerical study has been performed using CST microwave studio. © 2016 IEEE.

Chowdhury S.R.,University of Liberal Arts Bangladesh | Ali K.,University of Liberal Arts Bangladesh
19th International Conference on Computer and Information Technology, ICCIT 2016 | Year: 2016

A quantitative study has been performed in order to investigate the effects of human body on antenna performance. The analysis has been carried out at 900, 1800 and 2400 MHz using a half-wave dipole antenna. The antenna is positioned perpendicularly to the body. At each frequency, the antenna has been moved towards the human body from a distance of onewavelength to zero. A mathematical equation has been proposed relating the antenna gain with the distance from the body. A reasonable match has been obtained between the simulated and calculated gain. For simplification, a flat slab of muscle has been used to represent the human torso. Results show that, the gain of antennas varies exponentially from one-fourth of a wavelength to one-wavelength. Coefficients of the equations at the concerned frequencies are also presented. CST microwave studio and MATLAB are used for the numerical analysis. © 2016 IEEE.

Shopon M.,The University of Asia Pacific | Mohammed N.,University of Liberal Arts Bangladesh | Abedin M.A.,University of Liberal Arts Bangladesh
2017 IEEE International Conference on Imaging, Vision and Pattern Recognition, icIVPR 2017 | Year: 2017

Deep Convolutional Neural Networks - also known as DCNN - are powerful models for different visual pattern classification problems. Many works in this field use image augmentation at the training phase to achieve better accuracy. This paper presents blocky artifact as an augmentation technique to increase the accuracy of DCNN for handwritten digit recognition, both English and Bangla digits, i.e., 0-9. This paper conducts a number of experiments on three different datasets: MNIST Dataset, CMATERDB 3.1.1 Dataset and Indian Statistical Institute (ISI) Dataset. For each dataset, DCNNs with the proposed augmentation technique give better results than those without such augmentation. Unsupervised pre-training with the blocky artifact achieves 99.56%, 99.83% and 99.35% accuracy respectively on MNIST, CMATERDDB and ISI datasets producing, in the process, so far the best accuracy rate for CMATERDB and ISI datasets. © 2017 IEEE.

Roberts A.,University of Bristol | Conte D.,University of Bristol | Hull M.,University of Bristol | Hull M.,University of Edinburgh | And 6 more authors.
Journal of Neuroscience | Year: 2014

How do the pioneer networks in the axial core of the vertebrate nervous system first develop? Fundamental to understanding any full-scale neuronal network is knowledge of the constituent neurons, their properties, synaptic interconnections, and normal activity. Our novel strategy uses basic developmental rules to generate model networks that retain individual neuron and synapse resolution and are capable of reproducing correct, whole animal responses. We apply our developmental strategy to young Xenopus tadpoles, whose brainstem and spinal cord share a core vertebrate plan, but at a tractable complexity. Following detailed anatomical and physiological measurements to complete a descriptive library of each type of spinal neuron, we build models of their axon growth controlled by simple chemical gradients and physical barriers. By adding dendrites and allowing probabilistic formation of synaptic connections, we reconstruct network connectivity among up to 2000 neurons. When the resulting "network" is populated by model neurons and synapses, with properties based on physiology, it can respond to sensory stimulation by mimicking tadpole swimming behavior. This functioning model represents the most complete reconstruction of a vertebrate neuronal network that can reproduce the complex, rhythmic behavior of a whole animal. The findings validate our novel developmental strategy for generating realistic networks with individual neuron- and synapse-level resolution. We use it to demonstrate how early functional neuronal connectivity and behavior may in life result from simple developmental "rules," which lay out a scaffold for the vertebrate CNS without specific neuron-to-neuron recognition. © 2014 the authors.

Islam M.S.,University of Liberal Arts Bangladesh | Nasreen M.,University of Dhaka | Huq H.,United International University Dhanmondi
Indian Journal of Traditional Knowledge | Year: 2017

Local knowledge and practices can help people in drought prediction and extreme weather management. The study was carried out to elicit and document local knowledge use in drought prediction and weather extremes management. Focus group discussions were used for this study. The appearance of certain insects, birds, animals and indication of weather are all seen as important signals of change with respect to timing and seasonality of natural phenomena that are well understood in traditional knowledge systems. The lying of pigeon on the ground by spreading its feathers is considered as the sign of drought. The sound of wild cat with dhul was also indicates the notice of drought. If the west sky appeared with bright red colour during sunset, that also warn the drought. Termites den and mound in dry soil was thought as the hint of immense drought and termites den and mound in wet soil was looked as the indication of immediate rainfall. People from Hindu families organized frog’s marriage to end drought. They find that local knowledge and practices are very much useful in drought prediction and management. © 2017, National Institute of Science Communication and Information Resources (NISCAIR). All rights reserved.

Fouzder T.,University of Liberal Arts Bangladesh | Gain A.K.,University of New South Wales | Chan D.K.,Chartermate Electronics Ltd
Journal of Materials Science: Materials in Electronics | Year: 2017

This paper investigates the growth behavior, morphology of intermetallic compound (IMC) layer and hardness of low melting temperature Sn–35Bi–1Ag (wt%) solders on different surface-finished Cu substrates i.e., immersion Ag (ImAg)-plated Cu and Ag/Ni-plated Cu substrates. From SEM observation, a scallop-shaped Cu6Sn5 IMC layer was found to adhere at initial reaction stage on Sn–Bi–Ag solders/ImAg-plated Cu substrate system. However, a very thin Cu3Sn IMC layer was clearly also observed between the Cu6Sn5 IMC layer and substrate after a lengthy reaction. On the other hand, in Sn–Bi–Ag solder and Ag/Ni-plated Cu substrate system, a scallop-shaped Ni3Sn4 IMC layer was observed at the interface without any Cu3Sn IMC layer formation. These IMC layers thicknesses were increased with increasing the reaction time and temperature. However, the growth behavior of Ni3Sn4 IMC layer was slower than that of Cu6Sn5 and Cu3Sn IMC layers. In solder ball regions, bright contrast Bi and needle-shaped Ag3Sn phases were clearly observed in the dark contrast β-Sn matrix in both type of solder systems. Furthermore, bright contrast Bi phase size was increased with the reaction time. However, in the Sn–35Bi–1Ag solder and Ag/Ni-plated Cu substrate system, the Bi phase appeared with fine microstructure as compared with the Sn–35Bi–1Ag solder/ImAg-plated Cu substrate system because the Ag layer dissolved into the molten solder and changed the diffusivity and chemical affinity. The hardness values of Sn–Bi–Ag solder joints on ImAg-plated Cu and Ag/Ni-plated Cu substrates after 5 min reaction at 230 °C were about 23.0 and 24.1 HV, respectively—and about 18.9 and 20.4 HV after 30 min reaction at 230 °C, respectively. © 2017 Springer Science+Business Media, LLC

Korpal R.,University of Pune | Bose S.,University of Liberal Arts Bangladesh
ACM International Conference Proceeding Series | Year: 2016

The internet has increased the copy-paste scenarios amongst students as well as amongst researchers leading to different levels of plagiarized documents. For this reason, much of research is focused on for detecting plagiarism automatically. In this paper, an initiative is discussed where Natural Language Processing (NLP) techniques, as well as supervised machine learning algorithms have been combined to detect plagiarized texts. Here, the major emphasis is on to construct a framework which detects external plagiarism from monolingual texts successfully. For successfully detecting the plagiarism, n-gram frequency comparison approach has been implemented to construct the model framework. The framework is based on 120 characteristics which have been extracted during pre-processing the documents using NLP approach. Afterwards, filter metrics has been applied to select most relevant characteristics and then supervised classification learning algorithm has been used to classify the documents in four levels of plagiarism. Confusion matrix was built to estimate the false positives and false negatives. Our plagiarism framework achieved a very high accuracy score of 89% with low false positive and false negative rate. © 2016 ACM.

Monir S.,University of Liberal Arts Bangladesh | Rubya S.,Bangladesh University of Engineering and Technology | Ferdous H.S.,Bangladesh University of Engineering and Technology
International Conference on Intelligent Systems Design and Applications, ISDA | Year: 2012

Human posture identification for motion controlling applications is becoming more of a challenge. We present a posture classification system using skeletal-tracking feature of Microsoft Kinect sensor. Posture recovery is carried out by detecting the human body joints, its position, and orientation at the same time. Angular representation of the skeleton data makes the system very robust and avoids problems related to human body occlusions and motion ambiguities. The implemented system is tested on a class of relatively common postures comprising hundreds of human pose instances by different people, where our classifier shows an average accuracy of 94.9%, 96.7% and 96.9% for linear, exponential and priority based matching systems respectively. © 2012 IEEE.

Momen S.,University of Liberal Arts Bangladesh
Procedia Computer Science | Year: 2013

This paper presents a hybrid task allocation strategy for decentralized groups of mobile agents. The work is strongly inspired by the biological behavior of social insects. Agent based modeling approach has been used to model the behavior of agents. Environment of the model comprises of set of tasks and heterogeneous groups of mobile agents. Each group of agents follows respective local rules to communicate with neighboring agents and with the environment in their vicinity. The agents can not only carry out their own tasks but can also switch tasks to meet colonial demands. This paper presents an extension of a series of models presented earlier. In earlier models, agents reacted only to stimulus. Although evidence exists of task preferences among castes (bias) in many ant species, little work has been done in investigating the benefits for the colony of such preferences. This paper addresses the role of bias in the colony performance under different environmental circumstances. Experiment results indicate that the model presented in this paper is highly efficient, accurate and consistent with biological equivalents. The model with bias within a group is novel and has not been done before to the best of my knowledge. © 2013 The Authors. Published by Elsevier B.V.

Das D.,University of Liberal Arts Bangladesh
Journal of Theoretical and Applied Information Technology | Year: 2010

Bangladesh is a developing country. In developing countries, there is a digital divide between rural and urban areas. We need to provide locally relevant ICT services to overcome these divisions. Traditional software development methods are not suitable for developing the software of rural areas because they cannot serve the unique needs and complexities of such areas. I have tried to find the most appropriate way to engineer suitable software applications for rural communities of Bangladesh. I have developed a methodological framework for creating software applications for rural community. Socially structured computing framework to create software applications using the principle of action research and participative Design Guide as the best practices that helped me address all the problems that affect the success of the application. On the validity of the framework, I show that by using it to create Telemedicine Communicator (TC). TC is a prototype system for remote consultations in health for rural communities. It allows for communication between a small hospital in a village and a bigger hospital in neighboring village. It uses Voice over Internet Protocol (VoIP) combined with a store and forward approach to communications. TC can be tested over a Wireless Fidelity (wireless) network as well. Within social consciousness, it is suitable for the local development of relevant applications for rural areas of Bangladesh. I found that TC is an improvement of the solution of telemedicine in the community of destiny. Using this approach also led to a lot of knowledge about best practices for ICT development projects. I am also proposing that VoIP and Wi-Fi technology is relevant to rural areas and that the liberalization of telecommunications in Bangladesh is still needed to promote technological development in rural and underserviced areas. © 2005-2010 JATIT.

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