77 research outputs found
Stock Market and Economic Development in Bangladesh: A Case Study of Chittagong Stock Exchange
No full textThe stock market plays an important role in economic development of Bangladesh. It transfers the fund from surplus units to deficit units for investment. The main purpose of the study is to examine the significance of stock market in economic development of Bangladesh. The study has used only secondary data. The secondary data are collected only relevant to study such as market capitalization, stock turnover, number of listed securities and companies, stock index, GDP for measuring economic development during the period of 2003- 2013. The main reason to consider the certain period is the availability of data. The study has used some statistical measures of means, growth rate, and Ratio of total market capital to GDP method. This study revealed that stock markets have made substantial contribution in economic development of Bangladesh. The study seems to carry an enormous academic value since a few studies have been undertaken in this area. It may be helpful to the owners of CSE, Management, SEC, Academic researchers and national policy makers who have been making endeavor to the development of stock market development as well as Bangladesh Economy as a whole
Modelling and Simulation of Particle-particle Interaction in a Magnetophoretic Bio-Separation Chip
No full textA Lagrangian particle trajectory model is developed to predict the interaction between cell-bead complexes and to track the positions and angles of the particles in a magnetophoretic bio-separation chip. Magnetic flux gradients are simulated in OpenFOAM CFD software and imported to MATLAB to obtain the particle trajectories. A connector vector is introduced to calculate the interaction force between two cell-bead particle complexes as they flow through a microfluidic device. The interaction force calculations are performed for cases where the connector vector is parallel, perpendicular, and at an angle of 45 degrees with the applied magnetic field. The trajectories of the particles are simulated by solving a system of eight ordinary differential equations using the fourth order Runge-Kutta method. The model is then used to study the effects of geometric positions and angles of the connector vector between the particles as well as the bead size, cell size, number of beads per cell, and flow rate on the interaction force and trajectories of the particles
Contribution Based Author Categorization to Calculate Author Performance Index
No full textDespite the widely used author contribution criteria, unethical authorship practices such as guest, ghost, and honorary authorship remains largely unsolved. We have identified six major reasons by analyzing 78 published papers addressing unethical authorship practice. Those are lack of: (i) awareness about and (ii) compliance with authorship criteria, (iii) universal definition and scope for determining authorship, (iv) common mechanisms for positioning an author in the list, (v) quantitative measures of intellectual contribution; and (vi) pressure to publish. As a possible measure to control unethical practice, we have evaluated the possibility to adopt an author categorization scheme – proposed according to the common understanding of how first-, co-, principal-, or corresponding- author is perceived. Based on an online opinion survey, the proposed scheme was supported by ~80% of the respondents (n=370). The impact of the proposed categorization was then evaluated using a novel mathematical tool to measure “Author Performance Index (API)” that can be higher for those who might have authored more papers as primary and/or principal authors than those as coauthors. Hence, if adopted, the proposed author categorization scheme together with the API would provide a better way to evaluate the credit of an individual as a primary and principal author
Impact of Contact Constraints on the Dynamics of Idealized Intracranial Saccular Aneurysms
No full textThe rupture potential of intracranial aneurysms is an important medical question for physicians. While most intracranial (brain) aneurysms are asymptomatic, the quantification of rupture potential of both symptomatic and asymptomatic lesions is an active area of research. Furthermore, an intracranial aneurysm constrained by an optic nerve tissue might be a scenario for a physician to deal with during the treatment process. In this work, we developed a computational model of an idealized intracranial saccular aneurysm constrained by a rigid nerve tissue to investigate the impact of constrained nerve tissues on the dynamics of aneurysms. A comparative parametric study for constraints of varying length on aneurysm surface was considered. Our computational results demonstrated the impact of contact constraints on the level of stress near the fundus and provided insight on when these constraints can be protective and when they can be destructive. The results show that lesions with long contact constraints generated higher stress (0.116 MPa), whereas lesions without constraints generated less stress (0.1 MPa) at the fundus, which indicated that lesions with nerve constraints can be protective and less likely to rupture than the lesions without constraints. Moreover, lesions with point load on the fundus generated the highest stress (18.15 MPa) and, hence, they can be destructive
Dipole-Dipole Interaction Between Particle Complexes in a Magnetophoretic Bioseparation Chip
No full textCombined data mining and numerical modelling for hydro-morphological analysis : appliction to Bhola island in Bangladesh
No full textEFFECT OF DIFFERENT RATES OF NITROGEN AND PHOSPHOROUS APPLICATION ON THE GROWTH AND YIELD OF KARl TOMATO-2 (RATAN) (Lycoperskon esculentum. Mill)
No full textA Thesis
Submitted to the Department of Soil Science
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE
IN
SOIL SCIENCE
SEMESTER: JULY-DECEMBER, 2009The experiment was conducted at the Research Farm of Sher-e-l3angla
Agricultural University, Dhaka-1207. during November 2008 to March 2009 to
evaluate the effect of nitrogen (N) and phosphorous (P) on the growth and yield
component of BAR! tomato-2 (Ratan), is one of the high yielding varieties of
indeterminate type. The experiment was laid out in a Randomized Complete Block
Design (RCBD) with three replications of each fertilizers treatment combination.
The treatments used were: four levels of nitrogen as No: 0 kg N/ha, N
100: 100 kg
t
N/ha. N150
: 150 kg N/ha and N
200
: 200 kg N/ha and four levels of phosphorous as
P0: 0 kg P
205/ha, P50: 50 kg P
205Tha, P
100: lOU kg P
205!ha and p150: 150 kg P
205
/ha with 16 treatment combinations. Yield and yield contributing characters, N and
P concentration in plant and post harvest soil were recorded. Plant height at 60
days after transplanting, number of branches per plant, number of flowers per
plant, number of fruits of plant and fruit weight per plant increased significantly
with increasing N level up to 150 kg N/ha, whereas fruit yield increased
significantly up to 200 kg N/ha. All these parameters also increased significantly
with increasing the level of P up to 150 kg P/ha. However, the treatment
showed the maximum plant height at harvest (93.62 cm). On
the other hand, the treatment combination N20oPI00 produced the maximum
combination N
200?
ISO
number of flowers per plant (49.86), number of fruits per cluster (3.99), number of
fruits per plant (38.30) fruit weight (2.5
kg/plant) and fruit yield (89.93 tlha). N
and P concentrations in shoot and fruit were the highest in N
200P150 treatment. The
treatment had no significant effect on pH of post harvest soil. However increasing
the application of nitrogen increased soil total N and P content up to N
150
treatment. Application of P had not significant effect on total nitrogen but P
150
produced the highest P content in soil. N
200?150
combination had the highest N
(0.119%) and P (44.77 ppm) concentration in plant
Modeling and Simulation of Particle-Particle Interaction in a Magnetophoretic Bio-Separation Chip
No full textA Lagrangian particle trajectory model is developed to predict the interaction between cell-bead particle complexes and to track their trajectories in a magnetophoretic bio-separation chip. Magnetic flux gradients are simulated in OpenFOAM CFD software and imported into MATLAB to obtain the trapping lengths and trajectories of the particles. A connector vector is introduced to calculate the interaction force between cell-bead complexes as they flow through a microfluidic device. The interaction force calculations are performed for cases where the connector vector is parallel, perpendicular, and at an angle of 45 degrees with the applied magnetic field. The trajectories of the particles are simulated by solving a system of eight ordinary differential equations using a fourth order Runge-Kutta method. The model is then used to study the effects of geometric positions and angles of the connector vector between the particles as well as the cell size, number of beads per cell, and flow rate on the interaction force and trajectories of the particles. The results show that the interaction forces may be attractive or repulsive, depending on the orientation of the connector vector distance between the particle complexes and the applied magnetic field. When the interaction force is attractive, the particles are observed to merge and trap sooner than a single particle whereas a repulsive interaction force has little or no effect on the trapping length
Length–length and length-weight relationships and condition factor of nine freshwater fish species of Nageshwari, Bangladesh
No full textThe research carried out the length-length relationships (LLR), length-weight relationship (LWR) and condition factor of nine freshwater small indigenous species viz. G. giuris, E. Danricus, M. pancalus, L. guntea, C. fasciatus, P. sophore, H. Fossilis, C. punctatus and M. cavasius from the waterbodies of Nageshwari, Bangladesh. Relationships among different body lenght parameters of each species were found highly significant with all “r” values being >0.900. LWRs were obtained on the form of TW = aTLb. The “b” values range from 2.65-3.03. The parameter “b” of the length-weight relationship equation showed higher value (>3) only for G. giuris and C. fasciatus. Rest of the specimens showed lower value (9.00. The Fulton’s condition factors showed positive growth tendency for five specimens viz. G. giuris, C. fasciatus, P. sophore, C. punctatus, M. cavasius; and negative tendency for four specimens viz. E. danricus, M. pancalus, L. guntea, and H. Fossilis
Morphometric characters and condition factors of five freshwater fishes from Pagla river of Bangladesh
No full textThe research was aimed to carry out the length-length relationships, length-weight relationship and condition factor of five freshwater small indigenous fish species i.e. Amblypharyngodon mola, Puntius ticto, Cirrhinus reba, Chanda nama and Aspidoparia morar from the Pagla river Bangladesh. The relationships equations among different body length parameters of each species were found highly significant. The length-weight relationship equation were found as TW=0.0351 TL2.86 for A. mola, TW = 0.0104 TL3.10 for P. ticto, TW = 0.0261 TL2.96 for C. reba, TW = 0.0175 TL2.845 for C. nama TW= 0.0101 TL3.05 for A. morar. The “b” values ranged from 2.845-3.10 which remained on the expected range of optimum growth
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