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Md Haque

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Tribhuvan University

Ferdinand Kiemeneij

Leiden University

muhammet kızmaz

Selcuk University (Selçuk Üniversitesi)

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Papers by Md Haque

Distal radial access for routine consideration in coronary angiography-safety and feasibility study

International Journal of Research in Medical Sciences

Background: Traditionally transfemoral and proximal radial access sites are chosen for percutaneo... more Background: Traditionally transfemoral and proximal radial access sites are chosen for percutaneous coronary intervention (PCI) but both these access sites have periprocedural complications with respect to bleeding and radial artery occlusion respectively. Distal radial arterial access has advantages over the two in terms of patient comfort and almost nil periprocedural complications including radial artery occlusion (as the access is distal to the palmar arch) and preservation of proximal radial artery for future procedures like chronic haemodialysis and bypass graft conduit. This study sought to determine the safety, feasibility and advantages of the distal radial artery as routine access site for percutaneous coronary interventions.Methods: Between March and August 2019 a total of 70 patients were taken up for distal radial intervention (33 only CAG (coronary angiography), 37 adhoc PCI) after obtaining written informed consent before procedure.Results: Of all the patients undergo...

Comparative Study on Nonradiative Recombination Centers in Proton Irradiated InAs/GaAs Quantum Dot Structure by Two Wavelength Excited Photoluminescence

2017 IEEE 44th Photovoltaic Specialist Conference (PVSC), 2017

Age Difference in Research Course Satisfaction in a Blended Ed.D. Program: A Moderated Mediation Model of the Effects of Internet Self-Efficacy and Statistics Anxiety

Online Journal of Distance Learning Administration, 2017

This study identified the moderated mediation relationship among age, Internet self-efficacy, and... more This study identified the moderated mediation relationship among age, Internet self-efficacy, and statistics anxiety on student satisfaction after controlling for demographics and technology experiences in research methods courses in a blended professional doctoral program. One hundred and thirty-one students in a three-year Ed.D. Program participated in the study. The results show that after controlling for gender, ethnicity, and technology experiences, age was negatively associated with Internet selfefficacy and Internet self-efficacy mediated the relationship between age and course satisfaction as well. Although the moderation effect of statistics anxiety between self-efficacy and student satisfaction was not supported, there was still partial evidence that the group with statistics anxiety behaved differently from the group without statistics anxiety in terms of the conditional indirect effect of age on course satisfaction. The authors call for future studies to focus on online or blended research courses in professional doctoral programs and test the proposed conceptual model.

Thermal Behaviour of Polymer/Cellulose Fibre Composites. Effect of Chemical Modification and Interfacial Interactions

Reproductive Behavior of Tomato Plant under Saline Condition with Exogenous Application of Calcium

Crosslinked polyvinyl acetate reinforced with cellulose nanocrystals – : Characterization of structure and mechanical properties

The structure of cellulose based nanocomposites influences their final mechanical properties sign... more

Phenotypic and genotypic screening of rice genotypes at reproductive stage for salt tolerance

SAARC Journal of Agriculture, 2018

Salinity screening of 24 rice genotypes was performed at the reproductive stage for evaluating th... more Salinity screening of 24 rice genotypes was performed at the reproductive stage for evaluating their salt tolerance level. On the basis of yield and yield components, genotypes were categorized as tolerant, susceptible and moderately tolerant. PBRC-30, Ashfal, Horkuch, STL-20 and Pokkali were found as tolerant while Binadhan-7, S-39 L-11, S-37 L- 27, S-37 L-36 and S-37 L-39 were found as susceptible. Selected three SSR markers viz. RM336, RM21 and RM510 were used to determine salinity tolerance. The genetic diversity was ranges from 0.8194 to 0.8854 with an average of 0.8530. The highest PCI value was 0.8742 and the lowest was 0.8004 from RM510 and RM21, respectively. The UPGMA clustering system generated six genetic clusters. The highest genetically dissimilarity of (Cluster 1) vs (Cluster 2 sub-cluster A) and the crossing would be helpful for salt tolerant rice development. Thus, selected SSR primers and genotypes would be useful in marker assisted breeding, quantitative trait loc...

Study of Nonradiative Recombination Centers in n-GaN Grown on LT-GaN and AlN Buffer Layer by Below-Gap Excitation

Advances in Materials Physics and Chemistry, 2018

Nonradiative recombination (NRR) centers in n-type GaN samples grown by MOCVD technique on a LT-G... more Nonradiative recombination (NRR) centers in n-type GaN samples grown by MOCVD technique on a LT-GaN buffer layer and aAlN buffer layer have been studied by two wavelength excited photoluminescence (TWEPL). The near band-edge photoluminescence (PL) intensity decreases due to the superposition of below-gap excitation (BGE) light of energies 0.93, 1.17 and 1.27 eV over above-gap excitation (AGE) light of energy 4.66 eV. The decrease in PL intensity due to the addition of the BGE has been explained by a two levels recombination model based on SRH statistics. It indicates the presence of a pair of NRR centers in both samples, which are activated by the BGE. The degree of quenching in PL intensity for the sample grown on LT-GaN buffer layer is stronger than the sample grown on AlN buffer layer for all BGE sources. This result implies that the use of the AlN buffer layer is more effective for reducing the NRR centers in n-GaN layers than the LT-GaN buffer layer. The dependence of PL quenching on the AGE density, the BGE density and temperature has been also investigated. The NRR parameters have been quantitatively determined by solving rate equations and fitting the simulated results with the experimental data.

$Research paper thumbnail of Testing efficiency of the generalised $$\left( {{{G}'}/G} \right) $$ G ′ / G -expansion method for solving nonlinear evolution equations$

Testing efficiency of the generalised $$\left( {{{G}'}/G} \right) $$ G ′ / G -expansion method for solving nonlinear evolution equations

Pramana, 2019

In this investigation, we employ the generalised (G /G)-expansion method to test its efficiency i... more In this investigation, we employ the generalised (G /G)-expansion method to test its efficiency in extracting travelling wave solutions of nonlinear evolution equations (NLEEs). As test cases, the modified Kuramoto-Sivashinsky (mK-S) and the modified Burgers-Korteweg-de Vries (mB-KdV) equations are considered because of their importance in soliton theory. The general solutions are obtained in hyperbolic, trigonometric and rational function forms for both the equations. Taking specific parametric values in the corresponding general solutions, some new exact travelling waves in trigonometric and hyperbolic forms and only in hyperbolic form are obtained for the mK-S and mB-KdV equations, respectively. The obtained results are checked to see whether the criticism made by Parkes (Comput. Fluids 42, 108 (2011)), that the so-called 'new' solutions derived by the (G /G)-expansion method are often erroneous and are merely disguised versions of previously known solutions, is justified also for the generalised (G /G)-expansion method. The solutions were checked with Maple by putting them back into their corresponding equations. With specific values of parameters, some of our obtained solutions satisfied directly and some solutions never satisfied the considered NLEEs. Among the satisfactory solutions, some are found to be in disguised versions of some results obtained in this study.

The role of patience as a decision-making heuristic in leadership

Qualitative Research in Organizations and Management: An International Journal, 2017

PurposeThe purpose of this paper is to address the gap in the literature by providing a precise c... more PurposeThe purpose of this paper is to address the gap in the literature by providing a precise conceptualization of the concept of patience in the context of leadership.Design/methodology/approachThe current study was conducted using a qualitative approach as it aimed to explore leaders’ perceptions and experiences with patience and eventually build a theoretical model in relation to the role of patience in leadership. Because the aim of the study was to obtain insight into the experiences of the participants in their own words, this study adopted a grounded theory research design.FindingsThe grounded theory study resulted in an emergent theoretical model for understanding the decision-making process of leaders who exhibit patience as a character strength and how those leaders promote organizational success. Through an inductive approach, this grounded theory study identified the behaviors that participating leaders viewed as patient, as well as the outcomes and the contextual cond...

Computed tomographic evaluation of pulmonary mass lesions in chest radiograph

Journal of the Korean Radiological Society, 1984

GGE bipot analysis of genotype x environment interaction in rice (oryza sativa l.) genotypes in Bangladesh

Scientia Agriculturae, 2015

The GGE genotype main effect (G) and genotype by environment interaction (GE) biplot graphical to... more The GGE genotype main effect (G) and genotype by environment interaction (GE) biplot graphical tool was applied to analyze multienvironment trials (MET) data. The first two principal components (IPC1 and IPC2) were used to create a two-dimensional GGE biplot that accounted percentages of 49.4% and 39.1% respectively of sums of squares of the GE interaction. The combined ANOVA analysis for grain yield data indicated that the differences among all sources of variation were highly significant (P<0.01). Environment (E), Genotype (G) and G x E interaction effects accounted for 23.60, 16.27 and 24.89% of the total sum of squares, respectively. The GGE biplot suggested the existence of two rice mega-environments with wining genotypes G2 and G4. According to the ideal-genotype biplot, genotype G4 was the better genotype demonstrating high mean yield and high stability of performance across test locations. The average tester coordinate view indicated that genotype G1 had the highest average yield, and genotype G4 recorded the best stability. Among the six environments, E6 and E4 were most discriminating (informative) and E1 and E3 were most representative. The G4 is adaptable for a wide range of environments of Bangladesh.

Effect of reactive functionalization on properties and degradability of poly(lactic acid)/poly(vinyl acetate) nanocomposites with cellulose nanocrystals

Reactive and Functional Polymers, 2017

Abstract Nanocomposites of poly(lactic acid) (PLA) containing cellulose nanocrystals (CNCs) were ... more Abstract Nanocomposites of poly(lactic acid) (PLA) containing cellulose nanocrystals (CNCs) were prepared by dispersion of CNCs in aqueous poly(vinyl acetate) (PVAc) emulsion followed by melt extrusion with PLA. Functionalization of PVAc by radical grafting of glycidyl methacrylate (PVAc-GMA) was carried out during PVAc polymerization by using ammonium cerium (IV) nitrate as the initiator. The morphology, phase interactions, thermal and mechanical properties and degradability in composting of blends (PLA/PVAc, PLA/PVAc-GMA) and nanocomposites (PLA/PVAc/CNC, PLA/PVAc-GMA/CNC) containing 3 wt% CNC were examined by FESEM, AFM, FT-IR, DSC and tensile tests. The study of degradability demonstrated that the disintegration rate of PLA/PVAc-GMA/CNC in soil was higher than that of PLA/PVAc/CNC, likely because the epoxy groups of GMA accelerated the biodegradation rate through the formation of radicals.

Crosslinked poly(vinyl acetate) (PVAc) reinforced with cellulose nanocrystals (CNC): Structure and mechanical properties

Composites Science and Technology, 2016

Abstract The structure of cellulose-based nanocomposites significantly influences their final mec... more Abstract The structure of cellulose-based nanocomposites significantly influences their final mechanical properties. However, obtaining a good dispersion of hydrophilic nanocellulose materials in a hydrophobic polymer matrix is challenging. In this study, two unique methods were developed to improve the dispersion of cellulose nanocrystals (CNC) in a poly(vinyl acetate) (PVAc) matrix. One method was the crosslinking of PVAc by sodium tetraborate (borax), which is expected to prevent agglomeration of CNCs during the drying process, and the other method was the in-situ polymerization of vinyl acetate in the presence of CNCs to generate good compatibility between CNC and PVAc. The results showed that the crosslinking degree of PVAc could be varied by tuning the pH. The atomic force microscopy images illustrate that after drying, the in-situ polymerized PVAc/CNC composite was much better dispersed than the composite produced using mechanical mixing. The mechanical and thermo-mechanical characterizations indicate that the in-situ nanocomposite with 10 wt% of CNC had a higher strength and storage modulus compared with the mixed composite with the same CNC concentration. Further investigations of the restriction effect caused by the crosslinker are required.

Growth and Yield of Tomato as Influenced by GA3 and Pruning

International Journal of Current Research

An experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University, D... more An experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh during the period from October 2012 to March 2013 to find out the effect of GA3 and pruning on the growth and yield of tomato. The experiment consisted of three doses of GA3 such as 80, 100 and 120 ppm with control; three different pruning levels such as 1, 2 and 3 stem pruning. The experiment was laid out in a RCBD with three replications. Both GA3 and pruning had significant influence on growth and yield contributing characters of tomato. At 75 DAT, the highest plant height (117.30 cm), maximum number of leaves/plant (75.30) and highest yield (29.03 t/ha) were recorded from GA3 spray at 120 ppm. At 75 DAT, the highest plant height (113.60 cm), maximum leaves per plant (67.00) and yield (28.11 t/ha) were recorded from 2 stem pruning. The combined effect of 120 ppm GA3 and 2 stem pruning performed the highest yield (31.89 t/ha) and lowest from G0P1. So, 120 ppm GA3 ...

Investigation of luminescent properties of red-emitting Ba(Gd,Eu)B9O16 phosphors and the effect of Ca and Sr on its luminescent properties

Journal of Materials Science: Materials in Electronics, 2015

Abstract Eu3+-doped red-emitting BaGdB9O16 phosphors were synthesized via a sol–gel process and t... more Abstract Eu3+-doped red-emitting BaGdB9O16 phosphors were synthesized via a sol–gel process and the conventional solid state method. No concentration quenching of Eu3+ was observed in this research work. The effect of Ca2+ and Sr2+ on the luminescence of BaEuB9O16 (BEB) phosphor was also investigated. The partial replacement of Ba2+ by Sr2+ could improve the luminescence intensity of BEB phosphor remarkably. The luminescent intensity of sol–gel derived is comparable with the solid state product and it is about 92 % of solid-state product prepared at 950 °C under 395 nm light excitation. The emission intensity of the sol–gel derived phosphor is about 10 times higher than that of Y1.95Eu0.05O2S at 395 nm light excitation. Compared with the molybdate based recently reported red-emitting phosphors, the emission intensity of our obtained novel phosphors synthesized by various methods are much stronger under 395 nm excitation. Due to high emission intensity and good excitation profile, these phosphors can be used as red-emitting phosphor in solid-state lighting to generate white light.

BER Performance Analysis of a Concatenated Low Density Parity Check Encoded OFDM System in AWGN and Fading Channels

Journal of Scientific Research, 2009

In this paper, we investigate the bit error rate (BER) performance of a concatenated low density ... more In this paper, we investigate the bit error rate (BER) performance of a concatenated low density parity check (LDPC) encoded orthogonal frequency-division multiplexing (OFDM) system on color image transmission. In FEC concatenated channel coding, the OFDM wireless communication system incorporates 1/2-rated convolution encoder under various digital modulations (QPSK, 8PSK, QAM, 8QAM, 16QAM and 32QAM) over an additative white gaussian noise (AWGN) and other fading (Raleigh and Rician) channels. Computer simulation results on BER demonstrate that the LDPC encoded OFDM system outperforms with QAM modulation technique as compared to other digital modulation scheme and the system is highly effective to combat inherent interferences under Rayleigh and Rician fading channels. The transmitted color image is found to have retrieved effectively under noisy and fading situations with implementation of sum-product algorithm, an effective iterative based LDPC decoding scheme. It has also been an...

Pathogenicity of Macrophomina phaseoli on Jute in the Presence of Meloidogyne incognita and Hoplolaimus indicus

Journal of nematology, 1979

Seedlings of Corchorus capsularis (cv. C4444) were inoculated with Meloidogyne incognita, Hoplola... more Seedlings of Corchorus capsularis (cv. C4444) were inoculated with Meloidogyne incognita, Hoplolaimus indicus, and a fungus pathogen of jute, Macrophomina phaseoli, separately and in all possible combinations. The significant damage of jute plants caused individually by the pathogens was aggravated when the fungus was associated with either of the nematode species. M. incognita alone caused greater damage than either H. indicus or Macrophomina phaseoli alone. Plants inoculated with M. incognita and Macrophomina phaseoli were more severely damaged than plants inoculated with H. indicus and the fungus. Plant growth was minimum and disease symptoms were maximum when all pathogens acted together. In the presence of the fungus, M. incognita produced fewer galls. The reproduction of H. indicus was not influenced by the other organisms.

A Telematics Application for Stolen Vehicle Recovery Using On-Device Position Fixing

ABSTRACT

Biological Screening of Some Ferrocene Derivative Metal Complexes

Pakistan Journal of Biological Sciences, 2005

The aim of the present study was to investigate the antimicrobial and cytotoxic activities of fiv... more The aim of the present study was to investigate the antimicrobial and cytotoxic activities of five newly synthesized ferrocene based complexes [Mn {Fcd (COO) 2 }, A], [Co {Fcd (COO) 2 }, B], [Ni {Fcd (COO) 2 }, C], [Cu {Fcd (COO) 2 }, D] and [Zn {Fcd (COO) 2 }, E]. The maximum antibacterial (at the concentration 100 μG/disc) and antifungal (at the concentration 200 μG disc-1) activities were shown by the manganese complex A followed by cobalt complex B. The minimum activities were shown by zinc complex E. The minimum inhibitory concentration of the complexes was determined against four pathogenic bacteria Bacillus subtilis, Staphylococcus aureus, Salmonella typhi and Shigella dysenteriae and the values of complex A were found between 16-32 μG mL-1. Brine shrimp bioassay lethality was carried out for cytotoxicity measurements of the complexes and the LC 50 values were calculated after probit transformation of the resulting mortality data. Among the five complexes manganese complex A was showed highest cytotoxic effect, which is indicative of its probable effect on cancer cell lines.

Distal radial access for routine consideration in coronary angiography-safety and feasibility study

International Journal of Research in Medical Sciences

Background: Traditionally transfemoral and proximal radial access sites are chosen for percutaneo... more Background: Traditionally transfemoral and proximal radial access sites are chosen for percutaneous coronary intervention (PCI) but both these access sites have periprocedural complications with respect to bleeding and radial artery occlusion respectively. Distal radial arterial access has advantages over the two in terms of patient comfort and almost nil periprocedural complications including radial artery occlusion (as the access is distal to the palmar arch) and preservation of proximal radial artery for future procedures like chronic haemodialysis and bypass graft conduit. This study sought to determine the safety, feasibility and advantages of the distal radial artery as routine access site for percutaneous coronary interventions.Methods: Between March and August 2019 a total of 70 patients were taken up for distal radial intervention (33 only CAG (coronary angiography), 37 adhoc PCI) after obtaining written informed consent before procedure.Results: Of all the patients undergo...

Comparative Study on Nonradiative Recombination Centers in Proton Irradiated InAs/GaAs Quantum Dot Structure by Two Wavelength Excited Photoluminescence

2017 IEEE 44th Photovoltaic Specialist Conference (PVSC), 2017

Age Difference in Research Course Satisfaction in a Blended Ed.D. Program: A Moderated Mediation Model of the Effects of Internet Self-Efficacy and Statistics Anxiety

Online Journal of Distance Learning Administration, 2017

This study identified the moderated mediation relationship among age, Internet self-efficacy, and... more This study identified the moderated mediation relationship among age, Internet self-efficacy, and statistics anxiety on student satisfaction after controlling for demographics and technology experiences in research methods courses in a blended professional doctoral program. One hundred and thirty-one students in a three-year Ed.D. Program participated in the study. The results show that after controlling for gender, ethnicity, and technology experiences, age was negatively associated with Internet selfefficacy and Internet self-efficacy mediated the relationship between age and course satisfaction as well. Although the moderation effect of statistics anxiety between self-efficacy and student satisfaction was not supported, there was still partial evidence that the group with statistics anxiety behaved differently from the group without statistics anxiety in terms of the conditional indirect effect of age on course satisfaction. The authors call for future studies to focus on online or blended research courses in professional doctoral programs and test the proposed conceptual model.

Thermal Behaviour of Polymer/Cellulose Fibre Composites. Effect of Chemical Modification and Interfacial Interactions

Reproductive Behavior of Tomato Plant under Saline Condition with Exogenous Application of Calcium

Crosslinked polyvinyl acetate reinforced with cellulose nanocrystals – : Characterization of structure and mechanical properties

The structure of cellulose based nanocomposites influences their final mechanical properties sign... more

Phenotypic and genotypic screening of rice genotypes at reproductive stage for salt tolerance

SAARC Journal of Agriculture, 2018

Salinity screening of 24 rice genotypes was performed at the reproductive stage for evaluating th... more Salinity screening of 24 rice genotypes was performed at the reproductive stage for evaluating their salt tolerance level. On the basis of yield and yield components, genotypes were categorized as tolerant, susceptible and moderately tolerant. PBRC-30, Ashfal, Horkuch, STL-20 and Pokkali were found as tolerant while Binadhan-7, S-39 L-11, S-37 L- 27, S-37 L-36 and S-37 L-39 were found as susceptible. Selected three SSR markers viz. RM336, RM21 and RM510 were used to determine salinity tolerance. The genetic diversity was ranges from 0.8194 to 0.8854 with an average of 0.8530. The highest PCI value was 0.8742 and the lowest was 0.8004 from RM510 and RM21, respectively. The UPGMA clustering system generated six genetic clusters. The highest genetically dissimilarity of (Cluster 1) vs (Cluster 2 sub-cluster A) and the crossing would be helpful for salt tolerant rice development. Thus, selected SSR primers and genotypes would be useful in marker assisted breeding, quantitative trait loc...

Study of Nonradiative Recombination Centers in n-GaN Grown on LT-GaN and AlN Buffer Layer by Below-Gap Excitation

Advances in Materials Physics and Chemistry, 2018

Nonradiative recombination (NRR) centers in n-type GaN samples grown by MOCVD technique on a LT-G... more Nonradiative recombination (NRR) centers in n-type GaN samples grown by MOCVD technique on a LT-GaN buffer layer and aAlN buffer layer have been studied by two wavelength excited photoluminescence (TWEPL). The near band-edge photoluminescence (PL) intensity decreases due to the superposition of below-gap excitation (BGE) light of energies 0.93, 1.17 and 1.27 eV over above-gap excitation (AGE) light of energy 4.66 eV. The decrease in PL intensity due to the addition of the BGE has been explained by a two levels recombination model based on SRH statistics. It indicates the presence of a pair of NRR centers in both samples, which are activated by the BGE. The degree of quenching in PL intensity for the sample grown on LT-GaN buffer layer is stronger than the sample grown on AlN buffer layer for all BGE sources. This result implies that the use of the AlN buffer layer is more effective for reducing the NRR centers in n-GaN layers than the LT-GaN buffer layer. The dependence of PL quenching on the AGE density, the BGE density and temperature has been also investigated. The NRR parameters have been quantitatively determined by solving rate equations and fitting the simulated results with the experimental data.

$Research paper thumbnail of Testing efficiency of the generalised $$\left( {{{G}'}/G} \right) $$ G ′ / G -expansion method for solving nonlinear evolution equations$

Testing efficiency of the generalised $$\left( {{{G}'}/G} \right) $$ G ′ / G -expansion method for solving nonlinear evolution equations

Pramana, 2019

In this investigation, we employ the generalised (G /G)-expansion method to test its efficiency i... more In this investigation, we employ the generalised (G /G)-expansion method to test its efficiency in extracting travelling wave solutions of nonlinear evolution equations (NLEEs). As test cases, the modified Kuramoto-Sivashinsky (mK-S) and the modified Burgers-Korteweg-de Vries (mB-KdV) equations are considered because of their importance in soliton theory. The general solutions are obtained in hyperbolic, trigonometric and rational function forms for both the equations. Taking specific parametric values in the corresponding general solutions, some new exact travelling waves in trigonometric and hyperbolic forms and only in hyperbolic form are obtained for the mK-S and mB-KdV equations, respectively. The obtained results are checked to see whether the criticism made by Parkes (Comput. Fluids 42, 108 (2011)), that the so-called 'new' solutions derived by the (G /G)-expansion method are often erroneous and are merely disguised versions of previously known solutions, is justified also for the generalised (G /G)-expansion method. The solutions were checked with Maple by putting them back into their corresponding equations. With specific values of parameters, some of our obtained solutions satisfied directly and some solutions never satisfied the considered NLEEs. Among the satisfactory solutions, some are found to be in disguised versions of some results obtained in this study.

The role of patience as a decision-making heuristic in leadership

Qualitative Research in Organizations and Management: An International Journal, 2017

PurposeThe purpose of this paper is to address the gap in the literature by providing a precise c... more PurposeThe purpose of this paper is to address the gap in the literature by providing a precise conceptualization of the concept of patience in the context of leadership.Design/methodology/approachThe current study was conducted using a qualitative approach as it aimed to explore leaders’ perceptions and experiences with patience and eventually build a theoretical model in relation to the role of patience in leadership. Because the aim of the study was to obtain insight into the experiences of the participants in their own words, this study adopted a grounded theory research design.FindingsThe grounded theory study resulted in an emergent theoretical model for understanding the decision-making process of leaders who exhibit patience as a character strength and how those leaders promote organizational success. Through an inductive approach, this grounded theory study identified the behaviors that participating leaders viewed as patient, as well as the outcomes and the contextual cond...

Computed tomographic evaluation of pulmonary mass lesions in chest radiograph

Journal of the Korean Radiological Society, 1984

GGE bipot analysis of genotype x environment interaction in rice (oryza sativa l.) genotypes in Bangladesh

Scientia Agriculturae, 2015

The GGE genotype main effect (G) and genotype by environment interaction (GE) biplot graphical to... more The GGE genotype main effect (G) and genotype by environment interaction (GE) biplot graphical tool was applied to analyze multienvironment trials (MET) data. The first two principal components (IPC1 and IPC2) were used to create a two-dimensional GGE biplot that accounted percentages of 49.4% and 39.1% respectively of sums of squares of the GE interaction. The combined ANOVA analysis for grain yield data indicated that the differences among all sources of variation were highly significant (P<0.01). Environment (E), Genotype (G) and G x E interaction effects accounted for 23.60, 16.27 and 24.89% of the total sum of squares, respectively. The GGE biplot suggested the existence of two rice mega-environments with wining genotypes G2 and G4. According to the ideal-genotype biplot, genotype G4 was the better genotype demonstrating high mean yield and high stability of performance across test locations. The average tester coordinate view indicated that genotype G1 had the highest average yield, and genotype G4 recorded the best stability. Among the six environments, E6 and E4 were most discriminating (informative) and E1 and E3 were most representative. The G4 is adaptable for a wide range of environments of Bangladesh.

Effect of reactive functionalization on properties and degradability of poly(lactic acid)/poly(vinyl acetate) nanocomposites with cellulose nanocrystals

Reactive and Functional Polymers, 2017

Abstract Nanocomposites of poly(lactic acid) (PLA) containing cellulose nanocrystals (CNCs) were ... more Abstract Nanocomposites of poly(lactic acid) (PLA) containing cellulose nanocrystals (CNCs) were prepared by dispersion of CNCs in aqueous poly(vinyl acetate) (PVAc) emulsion followed by melt extrusion with PLA. Functionalization of PVAc by radical grafting of glycidyl methacrylate (PVAc-GMA) was carried out during PVAc polymerization by using ammonium cerium (IV) nitrate as the initiator. The morphology, phase interactions, thermal and mechanical properties and degradability in composting of blends (PLA/PVAc, PLA/PVAc-GMA) and nanocomposites (PLA/PVAc/CNC, PLA/PVAc-GMA/CNC) containing 3 wt% CNC were examined by FESEM, AFM, FT-IR, DSC and tensile tests. The study of degradability demonstrated that the disintegration rate of PLA/PVAc-GMA/CNC in soil was higher than that of PLA/PVAc/CNC, likely because the epoxy groups of GMA accelerated the biodegradation rate through the formation of radicals.

Crosslinked poly(vinyl acetate) (PVAc) reinforced with cellulose nanocrystals (CNC): Structure and mechanical properties

Composites Science and Technology, 2016

Abstract The structure of cellulose-based nanocomposites significantly influences their final mec... more Abstract The structure of cellulose-based nanocomposites significantly influences their final mechanical properties. However, obtaining a good dispersion of hydrophilic nanocellulose materials in a hydrophobic polymer matrix is challenging. In this study, two unique methods were developed to improve the dispersion of cellulose nanocrystals (CNC) in a poly(vinyl acetate) (PVAc) matrix. One method was the crosslinking of PVAc by sodium tetraborate (borax), which is expected to prevent agglomeration of CNCs during the drying process, and the other method was the in-situ polymerization of vinyl acetate in the presence of CNCs to generate good compatibility between CNC and PVAc. The results showed that the crosslinking degree of PVAc could be varied by tuning the pH. The atomic force microscopy images illustrate that after drying, the in-situ polymerized PVAc/CNC composite was much better dispersed than the composite produced using mechanical mixing. The mechanical and thermo-mechanical characterizations indicate that the in-situ nanocomposite with 10 wt% of CNC had a higher strength and storage modulus compared with the mixed composite with the same CNC concentration. Further investigations of the restriction effect caused by the crosslinker are required.

Growth and Yield of Tomato as Influenced by GA3 and Pruning

International Journal of Current Research

An experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University, D... more An experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh during the period from October 2012 to March 2013 to find out the effect of GA3 and pruning on the growth and yield of tomato. The experiment consisted of three doses of GA3 such as 80, 100 and 120 ppm with control; three different pruning levels such as 1, 2 and 3 stem pruning. The experiment was laid out in a RCBD with three replications. Both GA3 and pruning had significant influence on growth and yield contributing characters of tomato. At 75 DAT, the highest plant height (117.30 cm), maximum number of leaves/plant (75.30) and highest yield (29.03 t/ha) were recorded from GA3 spray at 120 ppm. At 75 DAT, the highest plant height (113.60 cm), maximum leaves per plant (67.00) and yield (28.11 t/ha) were recorded from 2 stem pruning. The combined effect of 120 ppm GA3 and 2 stem pruning performed the highest yield (31.89 t/ha) and lowest from G0P1. So, 120 ppm GA3 ...

Investigation of luminescent properties of red-emitting Ba(Gd,Eu)B9O16 phosphors and the effect of Ca and Sr on its luminescent properties

Journal of Materials Science: Materials in Electronics, 2015

Abstract Eu3+-doped red-emitting BaGdB9O16 phosphors were synthesized via a sol–gel process and t... more Abstract Eu3+-doped red-emitting BaGdB9O16 phosphors were synthesized via a sol–gel process and the conventional solid state method. No concentration quenching of Eu3+ was observed in this research work. The effect of Ca2+ and Sr2+ on the luminescence of BaEuB9O16 (BEB) phosphor was also investigated. The partial replacement of Ba2+ by Sr2+ could improve the luminescence intensity of BEB phosphor remarkably. The luminescent intensity of sol–gel derived is comparable with the solid state product and it is about 92 % of solid-state product prepared at 950 °C under 395 nm light excitation. The emission intensity of the sol–gel derived phosphor is about 10 times higher than that of Y1.95Eu0.05O2S at 395 nm light excitation. Compared with the molybdate based recently reported red-emitting phosphors, the emission intensity of our obtained novel phosphors synthesized by various methods are much stronger under 395 nm excitation. Due to high emission intensity and good excitation profile, these phosphors can be used as red-emitting phosphor in solid-state lighting to generate white light.

BER Performance Analysis of a Concatenated Low Density Parity Check Encoded OFDM System in AWGN and Fading Channels

Journal of Scientific Research, 2009

In this paper, we investigate the bit error rate (BER) performance of a concatenated low density ... more In this paper, we investigate the bit error rate (BER) performance of a concatenated low density parity check (LDPC) encoded orthogonal frequency-division multiplexing (OFDM) system on color image transmission. In FEC concatenated channel coding, the OFDM wireless communication system incorporates 1/2-rated convolution encoder under various digital modulations (QPSK, 8PSK, QAM, 8QAM, 16QAM and 32QAM) over an additative white gaussian noise (AWGN) and other fading (Raleigh and Rician) channels. Computer simulation results on BER demonstrate that the LDPC encoded OFDM system outperforms with QAM modulation technique as compared to other digital modulation scheme and the system is highly effective to combat inherent interferences under Rayleigh and Rician fading channels. The transmitted color image is found to have retrieved effectively under noisy and fading situations with implementation of sum-product algorithm, an effective iterative based LDPC decoding scheme. It has also been an...

Pathogenicity of Macrophomina phaseoli on Jute in the Presence of Meloidogyne incognita and Hoplolaimus indicus

Journal of nematology, 1979

Seedlings of Corchorus capsularis (cv. C4444) were inoculated with Meloidogyne incognita, Hoplola... more Seedlings of Corchorus capsularis (cv. C4444) were inoculated with Meloidogyne incognita, Hoplolaimus indicus, and a fungus pathogen of jute, Macrophomina phaseoli, separately and in all possible combinations. The significant damage of jute plants caused individually by the pathogens was aggravated when the fungus was associated with either of the nematode species. M. incognita alone caused greater damage than either H. indicus or Macrophomina phaseoli alone. Plants inoculated with M. incognita and Macrophomina phaseoli were more severely damaged than plants inoculated with H. indicus and the fungus. Plant growth was minimum and disease symptoms were maximum when all pathogens acted together. In the presence of the fungus, M. incognita produced fewer galls. The reproduction of H. indicus was not influenced by the other organisms.

A Telematics Application for Stolen Vehicle Recovery Using On-Device Position Fixing

ABSTRACT

Biological Screening of Some Ferrocene Derivative Metal Complexes

Pakistan Journal of Biological Sciences, 2005

The aim of the present study was to investigate the antimicrobial and cytotoxic activities of fiv... more The aim of the present study was to investigate the antimicrobial and cytotoxic activities of five newly synthesized ferrocene based complexes [Mn {Fcd (COO) 2 }, A], [Co {Fcd (COO) 2 }, B], [Ni {Fcd (COO) 2 }, C], [Cu {Fcd (COO) 2 }, D] and [Zn {Fcd (COO) 2 }, E]. The maximum antibacterial (at the concentration 100 μG/disc) and antifungal (at the concentration 200 μG disc-1) activities were shown by the manganese complex A followed by cobalt complex B. The minimum activities were shown by zinc complex E. The minimum inhibitory concentration of the complexes was determined against four pathogenic bacteria Bacillus subtilis, Staphylococcus aureus, Salmonella typhi and Shigella dysenteriae and the values of complex A were found between 16-32 μG mL-1. Brine shrimp bioassay lethality was carried out for cytotoxicity measurements of the complexes and the LC 50 values were calculated after probit transformation of the resulting mortality data. Among the five complexes manganese complex A was showed highest cytotoxic effect, which is indicative of its probable effect on cancer cell lines.