Showing papers by "International Islamic University, Chittagong published in 2014"
TL;DR: In this article, the Shari'ah compliance status of the Islamic banks in Bangladesh is evaluated based on both primary and secondary data collected from Qur'an, Hadiths, different circulars/letters, manuals, research books and journals, annual reports, Web sites of the sample banks.
Abstract: Purpose – The purpose of this paper is to evaluate the Shari’ah compliance status of the Islamic banks in Bangladesh. Design/methodology/approach – The research was based on both primary and secondary materials. The primary data were gathered through sample questionnaire survey and personal interviews by the researcher; the secondary data were obtained from Qur’an, Hadiths, different circulars/letters, manuals, research books and journals, annual reports, Web sites of the sample banks. Statistical tools and techniques like weighted average, percentage, SD, variance and correlation between Shari’ah violation score and bank-specific attributes were used applying statistical software Statistical Package for Social Science (version 17.0). Findings – Shari’ah compliance status of the Islamic banks in Bangladesh is in a vulnerable condition, Shari’ah compliance status highly varies among the Islamic banks, and Shari’ah violation is high in investing activities because of lack of knowledge, lack of sincerity in ...
69 citations
TL;DR: In this paper, theoretical Vickers hardness, thermodynamic and optical properties of four zirconium metal-based MAX phases Zr2AC (A = Al, Si, P and S) for the first time in addition to revisiting the structural, elastic and electronic properties.
Abstract: We have investigated theoretical Vickers hardness, thermodynamic and optical properties of four zirconium metal-based MAX phases Zr2AC (A = Al, Si, P and S) for the first time in addition to revisiting the structural, elastic and electronic properties. First-principles calculations are employed based on density functional theory (DFT) by means of the plane-wave pseudopotential method. The theoretical Vickers hardness has been estimated via the calculation of Mulliken bond populations and electronic density of states. The thermodynamic properties such as the temperature and pressure dependent bulk modulus, Debye temperature, specific heats and volume thermal expansion coefficient of all the compounds are derived from the quasi-harmonic Debye model. Further, the optical properties, e.g., dielectric functions, indices of refraction, absorption, energy loss function, reflectivity and optical conductivity of the nanolaminates have been calculated. The results are compared with available experiments and their various implications are discussed in detail. We have also shed light on the effect of different properties of Zr2AC as the A-group atom moves from Al to S across the periodic table.
55 citations
TL;DR: In this article, the authors developed traits and model of entrepreneurship development from Islamic point of view, which are used for developing entrepreneurship from Islamic perspective by performing various types of activities relating to the phases of preparatory and awareness development, support and motivation and feedback.
Abstract: Purpose – The purpose of this paper is to develop traits and model of entrepreneurship development from Islamic point of view. Design/methodology/approach – The study is descriptive, in so far as its goal is to describe a method, and the nature of the paper is conceptual. The study draws on secondary materials through library research. Findings – In this paper both the traits as well as model of entrepreneurship are developed from Islamic perspective. The salient traits are knowledge, initiative, risk taking, customer orientation, employee involvement, strategic thinking, fear of Allah, hard working, innovativeness, excellence, honesty and truthfulness, morality, vision, optimism, patience, social welfare, Halal earnings and economical. The model would be used for developing entrepreneurship from Islamic perspective by performing various types of activities relating to the phases of preparatory and awareness development, support and motivation and feedback. Research limitations/implications – The paper ha...
54 citations
TL;DR: In this article, the structural, elastic, electronic, optical and thermodynamics properties of sulvanite compounds were investigated using a different calculation code than that used by other workers and the results are compared.
Abstract: We present a systematic first-principles study of the structural, elastic, electronic, optical and thermodynamics properties of the sulvanite compounds Cu3TMS4 (TM = V, Nb and Ta). The structural, elastic and electronic properties are in fact revisited using a different calculation code than that used by other workers and the results are compared. The band gaps are found to be 1.041, 1.667 and 1.815 eV for Cu3VS4, Cu3NbS4 and Cu3TaS4, respectively which are comparable to other available calculated results. The optical properties such as dielectric function, refractive index, photoconductivity, absorption coefficients, reflectivity and loss function have been calculated for the first time. The calculated results are compared with the limited measured data on energy dependent refractive index and reflectivity coefficient available only for Cu3TaS4. All the materials are dielectric, transparent in the visible range. The values of plasma frequencies are found to be 15.36, 15.58 and 15.64 eV for Cu3VS4, Cu3NbS4 and Cu3TaS4, respectively. Furthermore, following the quasi-harmonic Debye model, the temperature effect on the bulk modulus, heat capacity, and Debye temperature is calculated reflecting the anharmonic phonon effects and these are compared with both experimental and other theoretical data where available.
39 citations
TL;DR: The Methanolic extracts of Gardenia coronaria leaves possessed a broad spectrum antibacterial activity against a variety of both Gram-negative and Gram-positive organisms like Streptococcus agalactiae, Escherichia coli, Pseudomonas aeruginosa, Bacillus cereus, Shigella sonnei, ShIGella boydii, and Proteus mirabilis.
Abstract: This work is carried out with Gardenia coronaria leaves that belong to the family Rubiaceae, which is a small-to-medium-sized but tall, deciduous tree, 7.6–9 m high on an average. Leaves are used for the treatment of rheumatic pain and bronchitis. The leaf of the plant consists of coronalolide, coronalolic acid, coronalolide methyl ester, ethyl coronalolate acetate triterpenes (secocycloartanes), and so forth. Methanol extract from the leaves of Gardenia coronaria was completely screened for membrane stability and antibacterial activity. The lower concentrations of Methanolic leaf extract of Gardenia coronaria gave good antimicrobial and anti-inflammatory activity, but higher concentrations gave relatively more projecting antibacterial activity in vitro as compared with Kanamycin. The crude drug’s anti-inflammatory effects were compared with those of Aspirin as positive control. The Methanolic extracts of Gardenia coronaria leaves possessed a broad spectrum antibacterial activity against a variety of both Gram-negative and Gram-positive organisms like Streptococcus agalactiae, Escherichia coli, Pseudomonas aeruginosa, Bacillus cereus, Shigella sonnei, Shigella boydii, and Proteus mirabilis, with a zone of inhibition from 10 to 16 mm. The extract also showed good membrane stability to be considered as having significant anti-inflammatory action.
37 citations
TL;DR: The study suggests that G. sylvestre has significant antioxidant activity and the antioxidant compound of this plant might be a therapeutic candidate against oxidative stress related diseases.
Abstract: Background: Averrhoa bilimbi, Gymnema sylvestre and Capsicum frutescens are medicinal plants commonly used as traditional medicine for the treatment of various diseases The present study was designed to investigate the antioxidant activities of Ethanolic extract of A bilimbi, G sylvestre and C frutescens Materials and Methods: The antioxidant activity of the extracts were evaluated using total phenolic and flavonoid contents, ferric reducing power and the free radical scavenging activity against 1,1-diphenyl-2-picrylhydrazyl (DPPH) Results: Total phenolic and flavonoid contents were higher in G sylvestre (5363636 0454545 mg/g gallic acid equivalent) and C frutescens (2666667 2081666 mg/g quercetin equivalent) respectively Reducing power of the crude ethanol extracts increased with the concentrations of the extracts and all the extracts showed moderate free radical scavenging activity against DPPH The plant extract displayed moderate phenolic and flavonoid contents compared to gallic acid and quercetin equivalent respectively, whereas also exhibited significant scavenging of DPPH radical and reducing power compared with ascorbic acid as standard Conclusion: Our study suggests that G sylvestre has significant antioxidant activity The antioxidant compound of this plant might be a therapeutic candidate against oxidative stress related diseases Different sub-fraction of A bilimbi and C frutescens should be studied further to assess the effect Further study is necessary for isolation and characterization of the active antioxidant agents for better treatment
27 citations
TL;DR: In this paper, the authors developed a comprehensive cross-sectional intervention to examine whether the income of those who participated in the training programmes of non-governmental organizations was related to that participation.
Abstract: Although microcredit is considered the main vehicle for increasing the income of the poor and alleviating poverty in Bangladesh, it is now well recognised that more than this is needed to reach the ultra poor in rural areas. Consequently, almost half of the Bangladesh population is in some way linked to non-governmental organizations' development programmes, at the centre of which is poverty alleviation. The study reported here developed a comprehensive cross-sectional intervention to examine whether the income of those who participated in the training programmes of non-governmental organizations was related to that participation. The study was carried out in three leading organizations in three districts of Bangladesh using a quantitative associational research design. Three hundred responses were analysed using multiple regression analysis to elicit information from ultra poor clients who had received training. The results suggest that the post-training income level of the trainees was negatively rather than positively related to the fact of their participation in training, the opposite of what human capital theory would lead us to expect.
24 citations
TL;DR: In this article, a new superconductor (Na 0.25 K 0.45 )Ba 3 Bi 4 O 12, having an A-site-ordered double perovskite structure, with a maximum T c ǫ −27 K has been discovered through hydrothermal synthesis at 593 K. The structural, elastic, electronic, and thermal properties of the new synthesized compound have been investigated theoretically.
Abstract: A new superconductor (Na 0.25 K 0.45 )Ba 3 Bi 4 O 12 , having an A -site-ordered double perovskite structure, with a maximum T c ∼ 27 K has very recently been discovered through hydrothermal synthesis at 593 K. The structural, elastic, electronic, and thermal properties of the new synthesized compound have been investigated theoretically. Here we have employed the pseudo-potential plane-wave (PP-PW) approach based on the density functional (DFT) theory, within the generalized gradient approximation (GGA). The elastic constants ( C ij ), Pugh‘s ratio, Cauchy‘s pressure and other elastic parameters are derived first time. We have discussed the bonding nature in the light of the electronic valence charge density. Both electron and hole-like Fermi surfaces are present in the compound under study which indicate the multiple-band nature of (Na 0.25 K 0.45 )Ba 3 Bi 4 O 12 . The compound is indicated to be a strongly coupled superconductor which is based on the estimated e-ph coupling constant. The thermodynamic properties at elevated temperature and pressure are calculated and analyzed for the first time by using quasi-harmonic model which includes vibrational term.
21 citations
18 Dec 2014
TL;DR: In this article, the authors presented modeling, analysis and simulation of a Dynamic Voltage Restorer (DVR) test systems using MATLAB Simulink for minimizing voltage sag by two promising controlling strategies: control using PI controller and control based on Park's Transformation.
Abstract: Modern electronics based on power electronic devices such as Programmable Logic Controllers (PLC), Distributed Control System (DCS) are used frequently in industrials plants to improve efficient production. These systems are extremely sensitive to power quality problem like voltage sag. Voltage sag is considered to be one of the most severe problems that cause failure, overheating and finally a total shutdown of industrial plants. It has been observed that, Dynamic Voltage Restorer (DVR) is the most efficient and effective modern custom power device exercised in power distribution networks to minimize voltage sags. The efficiency of the DVR depends on the performance of the control technique, which involved in switching the inverters. This paper presents modeling, analysis and simulation of a Dynamic Voltage Restorer (DVR) test systems using MATLAB Simulink for minimizing voltage sag by two promising controlling strategies: control using PI controller and control based on Park's Transformation. Simulation results of DVR controlling found by MATLAB Simulink here which demonstrates the well-organized plant applications. Moreover, this work shows that, control based on Park's Transformation provides better sag improvement than PI Control.
18 citations
TL;DR: The present study supports the use of V. tessellata in different inflammatory disorders by evaluating the antinociceptive and cytotoxic effect of methanol and aqueous extracts of the leaf extract.
Abstract: Vanda tessellata (Orchidaceae) has been used in different sorts of ailments such as inflammations, rheumatism, dysentery, bronchitis, dyspepsia and fever in folk medicine. In this study we evaluated the antinociceptive and cytotoxic effect of methanol and aqueous extracts of V. tessellata leaf. Oral administration of V. tessellata aqueous (VTA) and methanol (VTM) leaf extracts at 200 and 400 mg/kg body weight (bw) doses were assessed for antinociceptive activity in acetic acid-induced writhing test, hot plate test, and tail immersion test in mice. In this study we also screened for cytotoxicity of the extracts by the brine shrimp (Artemia salina) lethality assay. The extracts, at both doses, exhibited a significant (p < 0.05 - < 0.01) dose-dependent antinociceptive activity in hot plate and tail immersion test. The reaction time was increased to the thermal stimuli at 200 and 400 mg/kg doses up to 90 min. In acetic acid-induced writhing test, oral administration of VTA and VTM (200 and 400 mg/kg) also decreased the writhing significantly while compared to control. The dose 400 mg/kg showed maximum percentage of pain inhibition 42.37% and 45.08% for VTA and VTM respectively. Diclofenac sodium (10 mg/kg) and nalbuphine (10 mg/kg) were used as reference antinociceptive drugs. Very low cytotoxicity was observed on brine shrimps lethality assay. The leaf extract has potential antinociceptive activity with minimum cytotoxicity. The present study supports the use of V. tessellata in different inflammatory disorders.
18 citations
TL;DR: This study demonstrates that the treated extract of Alpinia nigra has significant central nervous system depressant effect and further studies on active constituent of the extract can provide approaches for therapeutic intervention.
Abstract: Objective
To analyze in vivo neuro-pharmacological effects of Alpinia nigra as anxiety is a particular form of behavioral inhibition that occurs in response to novel environmental events.
10 Apr 2014
TL;DR: A `fault current' (due to asymmetric faults) analysis and comparisons between HVAC and HVDC transmission system are presented and a comparison of the simulation output-lower fault current, less fault effect, better performance & higher reliability is demonstrated for HVDD transmission system.
Abstract: `Fault current' is the flow of abnormal current through an improper path due to electric faults which causes enormous damages. In HVAC transmission system, Fault current due to electric faults is too large which affects the overall power system including-Receiving & Sending end bus, Transmission system, Load and even also the Power Generation Unit. HVDC transmission system dramatically reduces these effects, as the fault current due to electric faults is much lower, and only affects the individual faulty section of the overall transmission system. In favor of HVDC system, this paper presents a `fault current' (due to asymmetric faults) analysis and comparisons between HVAC and HVDC transmission system. MATLAB (Simulink) simulation software is used to simulate both HVAC & HVDC power transmission system topologies. From the comparison of the simulation output-lower fault current, less fault effect, better performance & higher reliability is demonstrated for HVDC transmission system.
TL;DR: This article was published in Asian Pacific Journal of Reproduction [© 2014 Elsevier (Singapore) Pte Ltd] and the definite version is available at: http://ac.els-cdn.com/S2305050014600154/1-s2.0-S230 5050014 600154-main.pdf.
18 Dec 2014
TL;DR: A comprehensive study is done on meter reading infrastructure, and the network payload of AMI Distributed Area Network (DAN) is analyzed from customer data collector node to control centre or vice versa.
Abstract: Advanced Metering Infrastructure (AMI) is an enormous part of smart grid technology which enables two way communications between the smart meter of customer and control centre. Similar to other parts of the smart grid, choosing suitable communication technology is one of the most challenging parts of AMI. For effective communications, the reliability of flow of applications data is very crucial with the selection of communication technology. Besides that, proper estimation of network load in worst condition of the network is also important for evaluating the performance of network. Little research has been conducted on analyzing and simulating the Distributed Area Network (DAN) by considering both uplink and downlink applications of AMI. In this paper, a comprehensive study is done on meter reading infrastructure, and the network payload of AMI Distributed Area Network (DAN) is analyzed from customer data collector node to control centre or vice versa. Network is designed using WiMAX technology. Performance analysis of the network is carried out in terms of end to end delay and application wise time delay by varying number of nodes in the network to demonstrate AMI in an efficient manner.
TL;DR: In this article, the authors investigated the effect of the aspect ratio of the cavity for average fluid temperature at exit port, average Nusselt number, maximum temperature of the fluid in the domain, drag coefficient, isotherms and streamlines on behalf of different Hartmann numbers and Rayleigh numbers.
Abstract: This study investigated the effects of the aspect ratio of the cavity for average fluid temperature at exit port, average Nusselt number, maximum temperature of the fluid in the domain, drag coefficient, isotherms and streamlines on behalf of different Hartmann numbers and Rayleigh numbers. Solution of governing equations of momentum and energy has been made by finite element technique. Above mentioned parameters such as an aspect ratio which is cavity height to cavity length change from Ar = 0.5 to 2 for different Rayleigh numbers and Hartmann numbers which change from Ra = 10 3 to 10 5 and Ha = 0 to 50 respectively. Prandtl number Pr = 7 and Reynolds number Re = 100 is fixed in this simulation . It is found that variation of the aspect ratio makes an important effect for higher values of Rayleigh numbers. Heat transfer enhances with increasing of aspect ratio. Increasing of Hartmann number decreases the heat transfer inside the cavity. Keywords: Temperature boundary conditions; Open cavity; Aspect ratio; Finite element methods. © 2014 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved. doi: http://dx.doi.org/10.3329/jsr.v6i2.14505 J. Sci. Res. 6 (2), 243-256 (2014) Normal 0 false false false EN-US X-NONE X-NONE
TL;DR: In this article, the authors present various perspectives on Islamization of education including the crisis of the Muslim mind, the major findings of the Makkah World Conference, the neutrality of modern knowledge, the process of Islamization and teacher education.
Abstract: Islamic educationists and thinkers put forward that the concepts of education should be anchored in the strengths of akidah (faith). They prescribe that faith and knowledge should be integrated to ensure that the individuals can be guided to be the khalifatullah (Allah’s vicegerent). Knowledge should be relied to permanent sources and not to relative ones to ensure that its existence is in line with the ultimate and permanent faith and beliefs. Men’s intellectual abilities are closely linked to the Creator. Educational system which is not aqidah -oriented will produce imbalanced and less harmonious societies. The holding of the First World Conference on Muslim Education in 1977 was significant event that in fact boost up the resurgence of education in Muslim societies. The fundamental purpose of the conference was to bring back into the Muslim education the Islamic vision. At the background of the historic event, there was a realization among Muslim scholars of the crisis that had beset their education over time. Examining the relevant literature, this paper attempts to present various perspectives on Islamization of Education including the crisis of the Muslim mind, the major findings of the Makkah World Conference, the neutrality of modern knowledge, the process of Islamization and teacher education. Normal 0 false false false EN-US X-NONE AR-SA /* Style Definitions */
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01 Dec 2014
TL;DR: In this paper, a genetic algorithm based optimal design of Static VAR Compensator (SVC) controller is proposed to improve the transient performance of power system by tuning the parameters of the damping controller by optimal selection of damping ratio of the critical eigenvalue employing genetic algorithm.
Abstract: With the increase of loading of long transmission line, transient stability of power system on the occurrence of a fault become one of the major concern for power engineers. Instability problem of power system on occurrence of the fault can be solved with the use of Static VAR Compensator (SVC) controller. Assessing the transient stability of a large inter connected power network very much nonlinear and tremendously complicated. To mitigate this complication and nonlinearity, a substantial research with SVC controller has been done in the power industry. To improve the system stability for dynamic and transient disturbances SVC plays a very important role, which is a shunt connected FACTS devices. In this work, genetic algorithm based optimal design of SVC controller to improve the transient performance of power system is proposed. The parameters of the damping controller by optimal selection of damping ratio of the critical eigenvalue employing genetic algorithm are tuned. The effectiveness of the developed optimal controller is investigated by simulating different abnormal conditions of a single machine infinite bus (SMIB) system using MATLAB based PST.
TL;DR: In this article, a study aimed at understanding the volatility of the DSE has been made by using the Generalized Autoregressive Conditional Heteroskedasticity (GARCH) models to estimate the presence of volatility.
Abstract: This study aimed at understanding the volatility of Dhaka Stock Exchange (DSE). The daily and monthly average DSE General Index (DGEN), from the period January 1, 2002 to July 31, 2013 has been used. The study has been made by using the Generalized Autoregressive Conditional Heteroskedasticity (GARCH) models to estimate the presence of volatility. Though volatility is a common phenomenon in the capital market, the study recommends careful monitoring of volatility by the concerned authority if necessary. It is also recommended that activities of corporate insiders should be properly checked and information should become available for all of the interested investors and to ensure adequate supply of stock through active participation of the government and giant national and multinational companies and so forth.
TL;DR: In this article, high purity nanocrystalline α-alumina powder was mixed with 20 wt% ZrO2 by slurry method sintered at temperature (Ts) 1450°C, 1500°C and 1600°C for 2 hours.
Abstract: High purity nanocrystalline α-alumina powder was mixed with 20 wt% ZrO2 by slurry method sintered at temperature (Ts) 1450°C, 1500°C, 1550°C and 1600°C for 2 hour. The density, porosity, structural properties and mechanical properties of Al2O3-ZrO2 composites with respect to sintering temperature have been explored in the present work. The XRD spectra indicate that α-Al2O3, t and m-ZrO2 are the crystalline phases present in 20 wt% ZTA composites for all sintering temperature. It is observed that with higher sintering temperature the intensity of m-ZrO2 phases increases and the t-ZrO2 phases decreases. However, t-ZrO2 retention becomes much easier to trigger the transformation to monoclinic. Higher density of 20 wt% ZTA has been achieved at 1600oC, whereas the highest porosity was obtained for sintering temperature 1450°C.The microstructures of the samples was studied by using SEM which represents highly homogeneous and finer structure at 1600oC. The effect of sintering temperature on hardness, elastic modulus and flexural strength were investigated and has been found to increase with the increase of sintering temperature. Maximum
01 Jan 2014
TL;DR: Green businesses are enterprises which consider environmental protection as an essential component for their long-term business objectives, both by promoting eco-efficient production activities and by marketing sustainable products and services as discussed by the authors.
Abstract: Green businesses are enterprises which consider environmental protection as an essential component for their long-term business objectives, both by promoting eco-efficient production activities and by marketing sustainable products and services (Barnes, n.d.). Green products may be defined as products or services that have a lesser or reduced bad effect on human health and the environment when compared with competing products or services that serve the same purpose (Website). The purposed of green business are (i) to promote more socially inclusive development (ii) to reduce environmental degradation (iii) to mitigate the effects of climate change (iv) to deal with pressures of population growth (v) to manage, issues of increased scarcity and volatile prices of raw materials effectively. Examples of green product are compact fluorescent lamps (CFLs), which use 75% less energy than ordinary incandescent ones, organic foods, which are grown and processed without antibiotics, pesticides, or synthetic fertilizers, hybrid electric vehicles such as the Toyota Prius, which achieves a fuel economy of 48 city-mpg and 45 highway-mpg (Website)., and green hotels, which are trying to conserve water, energy, and materials usage (Sharkey, 2008). Green business in practically existent everywhere around us. Company such as Wal-mart and General Electric transforming their business practices into green ones (YeganehaGlavas, 2008). In a study conducted by MeKinsey of 4,238 business executives in 116 countries, 84% believed that business should contribute to the public good; however, only 3% believe that their companies are currently doing a good job (McKinsey, 2006). Thus, green business is an enterprise that has no negative impact on the (i) environment (ii) economy (iii) society (iv) community. Further, it meets the requirement of the triple bottom line such as financial benefits of the company, natural world betterment and social advantages for employees and members of the local community. The triple bottom line gives importance on initial value instead of the after effects.
Journal Article•
TL;DR: In this article, the effect of 3 mol% yttria-stabilized zirconia (3YSZ) addition on microstructure and mechanical properties of 3YSZ-40 wt% Al2O3 composite was investigated.
Abstract: The effect of Al2O3 addition on microstructure and mechanical properties of high purity 3 mol% yttria-stabilized zirconia (3YSZ) was investigated. The monoclinic zirconia (m-ZrO2) phase has completely been transformed into tetragonal zirconia (t-ZrO2) phase for Al2O3 content. The presence of 3YSZ particles on the grain boundaries effectively limits a rapid grain growth of the Al2O3 grains. The maximum flexural strength of 340 MPa and Vickers hardness value of 14.31 GPa in the 3YSZ-40 wt% Al2O3 composite were attributed to the microstructure with ZrO2 grains as inter- and intragranular particles in the Al2O3 matrix grains, which makes it suitable for specific dental applications.
01 Dec 2014
TL;DR: An effective algorithm to detect defects automatically and effectively in industrial pipes based on image processing and shows that the accuracy of identification rate is about 96% at hole detection and 93% at crack detection.
Abstract: This paper proposes an effective algorithm for detecting and distinguishing defects in industrial pipes. In many of the industries, conventional defects detection methods are performed by experienced human inspectors who sketch defect patterns manually. However, such detection methods are much expensive and time consuming. To overcome these problems, a method has been introduced to detect defects automatically and effectively in industrial pipes based on image processing. Although, most of the image-based approaches focus on the accuracy of fault detection, the computation time is also important for practical applications. The proposed algorithm comprises of three steps. At the first step, it converts the RGB image of the pipe into a grayscale image and extracts the edges using Sobel gradient method, after which it eliminates the undesired objects based on their size. Secondly, it extracts the dimensions of the pipe. And finally this algorithm detects and identifies the defects i.e., holes and cracks on the pipe based on their characteristics. Tests on various kinds of pipes have been carried out using the algorithm, and the results show that the accuracy of identification rate is about 96% at hole detection and 93% at crack detection.
TL;DR: In this article, a computational solution has been made to obtain flow and temperature field inside a channel with a cavity under magnetic field and joule effect, where the left side of the cavity is shorter than right side.
23 May 2014
TL;DR: The design and implementation of a multi-directional solar tracking system dedicated to use with PV panels that ensures the maximization of the conversion of solar energy into electricity by properly orienting the PV panel in accordance with the real position of the sun.
Abstract: A solar tracking system is designed for the orientation of different solar energy receivers, photovoltaic arrays or thermal receivers to maximize the operation of solar energy conversion This paper deals with the design and implementation of a multi-directional solar tracking system dedicated to use with PV panels The proposed solar tracking device ensures the maximization of the conversion of solar energy into electricity by properly orienting the PV panel in accordance with the real position of the sun The dual axis solar tracker moves only in vertical direction with Y and Z-axis movement It cannot move in horizontal direction with X-axis movement Our proposed model can move in vertical position with Y-axis movement and in horizontal position with X-axis movement and also move at a point in Z-axis making combination of X and Y-axis movement The gain of output power with the Multi-directional tracking system is higher when compared with a dual axis tracker The performance of the proposed solar tracker was experimentally analyzed
Journal Article•
TL;DR: In this paper, the authors conducted a study on 300 regular and part-time employees of Bangladesh to find out the most motivating factors of both regular and regular employees of both organizations and found that good salary, job security, good working condition and interesting work are the most important motivating factors for the regular employees.
Abstract: Nowadays both part-time as well as regular employees are working in many organizations of Bangladesh. Though many studies have been conducted to know the motivation status of regular employees but no study is found that addressed motivations status of both regular and part-time employees of Bangladesh. Thus, this study is conducted on 300 regular and part-time employees of Bangladesh to know the most motivating factors of both regular and part-time employees. Respondents were asked to identify and rank ten motivation factors in the order of their magnitude. The findings reveal that good salary, job security, good working condition and interesting work are the most important motivating factors for the regular employees, whereas; flexibility of work, interesting work, good salary and good work environment are the most important motivating factor for part-time employees, because most of the part-time employees working in different organizations are either students or regular employees of other organizations. The findings of the study can be useful for managers and human resource (HR) professionals for motivating regular employees as well as part-time employees and thereby achieving the goals of organization more effectively and efficiently.
01 Dec 2014
TL;DR: A digital learning display has been designed especially for the children in rural areas from which they can learn Bengali and English alphabet and numbers and an 8-bit PIC microcontroller is used for generating different character patterns.
Abstract: In this paper a digital learning display has designed especially for the children in rural areas from which they can learn Bengali and English alphabet and numbers. The display is formed cascading twelve 8×8 dot matrix displays so that the designed character patterns are attractive to the children. It can be controlled by an IR remote. Only a 12V DC battery is enough to drive the display. The power consumption of the display is very low. So, schools at remote area where electricity is not available can easily use this display to make the learning more enjoyable to the children. An 8-bit PIC microcontroller is used to control the display and generating different character patterns. This is our first attempt to make the learning interesting for the children. In future, we can add some additional features with this display such as games, music, animation etc.
01 Jan 2014
TL;DR: In this paper, the authors used judgment sampling to identify customer satisfaction through e-service quality of Islami Bank Bangladesh Limited (IBBL) and found that customers faced ATM service disorder, problems in using using using sms banking services, prompt service from the bank.
Abstract: The purpose of the study is to identify customer satisfaction through e-service quality of Islami Bank Bangladesh Limited (IBBL). Buckley (2003:455) defines e- Service as the electronic provision of a service to customers whilst Santos (2003:234) describes e-service as the provision of consumers with a superior experience with respect to the interactive flow of information. The researchers used judgment sampling. Customers faced ATM service disorder, problems in using using sms banking services, prompt service from the bank. User-friendly, responsive online service experiences, educating customer how to use online service, training of employees will increase the e-service quality of IBBL in future.
01 Dec 2014
TL;DR: How to design a clinical knowledge base and inference process of a CDSS by using belief rule-based system with an evidential reasoning approach is described.
Abstract: taking into account, the need for handling clinical information under uncertainty from clinical domain knowledge and clinical data in clinical decision making, we proposed a new Belief Rule Based (BRB) Architectural Framework to design a clinical decision support system (CDSS). It can handle uncertain information to support the clinical decision making process. This paper describes how to design a clinical knowledge base and inference process of a CDSS by using belief rule-based system with an evidential reasoning approach. A case study demonstrates to employ this BRB Architectural Framework in developing CDSS is a reliable novel approach.
TL;DR: Design of Static Synchronous Series Compensator (SSSC) based damping controller is proposed to enhance the stability of a Single Machine Infinite Bus (SMIB) system by means of Invasive Weed Optimization (IWO) technique.
Abstract: This paper proposes designing of Static Synchronous Series Compensator (SSSC) based damping controller to enhance the stability of a Single Machine Infinite Bus (SMIB) system by means of Invasive Weed Optimization (IWO) technique. Conventional PI controller is used as the SSSC damping controller which takes rotor speed deviation as the input. The damping controller parameters are tuned based on time integral of absolute error based cost function using IWO. Performance of IWO based controller is compared to that of Particle Swarm Optimization (PSO) based controller. Time domain based simulation results are presented and performance of the controllers under different loading conditions and fault scenarios is studied in order to illustrate the effectiveness of the IWO based design approach.
TL;DR: In this article, the authors conducted a personal interview with mushroom farmers in Bangladesh to depict the cost and profitability of mushroom cultivation and found that one can earn nearly TK 4-5 thousands a month by investing only TK 10-15 thousands.
Abstract: Mushroom is the most popular delicious, nutritious and medicinal vegetable in the world. Now it is considered as the most promising concept for crop diversification. It has been regarded as an effective means for poverty alleviation in less developed countries due to its potential for a quick, high return of profit on a small investment. Bangladesh is one of the most suitable countries in the world for Mushroom cultivation due to its favorable climate, cheap raw materials and labor cost and high market price. It is such an income generating concept that can alleviate poverty and eradicate malnutrition. It can also create employment opportunities for landless beggar, educated and uneducated youth, person with disabilities and adolescent men and women respectively. The primary objective of the study is to alleviate poverty, unemployment and malnutrition through cultivating and selling mushroom. The study is analytical and theoretical in nature and based on the secondary data. However, personal interview has been conducted to the mushroom farmers to depict the cost and profitability of Mushroom cultivation. The study finds that Mushroom cultivation can open a new opportunity for landless and unemployed people as it does not require any cultivable land and can be grown in a room by racking vertically. One can earn nearly TK 4-5 thousands a month by investing only TK 10-15 thousands. So, it is possible to make a handsome profit by investing a small amount of capital and labor in Mushroom cultivation.