234 research outputs found
Challenges of procurement of works through international open tendering method: a case study on moghbazar-mouchak flyover project
No full textThis dissertation is submitted in partial fulfillment of the requirements for the degree of Masters in Procurement and Supply Management, 2015.Cataloged from PDF version of thesis report.Includes bibliographical references (page 47).On the basis of a number of arguments by procurement experts and from findings of some
international organizations on International Open Tendering Method (IOTM) procurement
procedures, this study has sought to investigate the extent of its practices and major
challenges at the procurement for projects implemented in Bangladesh by the Local
Government Engineering Department (LGED).
This study has started with reviewing different aspects of IOTM through literature review. It
has found that there exist differences in IOTM procurement procedures followed by different
donor agencies like World Bank, ADB, IDB, DFID, USAID etc. It has found that IOTM as an
essential system in implementing major and complicated public works in Bangladesh
particularly by the LGED. Openness and transparency in IOTM is a must. There is no scope
of corruption in decision making process of tender evaluation stage.
This study also finds that procurement guideline of World Bank and ADB is very strong and
play dominant roles in the procurement policy process. It works in a well structured
framework. There exist strong internal control and accountability mechanisms making
decision making process unique.
In-depth investigation depicts that procurement official have the willingness and proper
attitude to serve the people. This study also reveals structural, managerial as well as efficiency
problems in the IOTM procurement. World Bank and ADB’s procurement guideline is still
flexible and decentralized. Official jobs for procurement, authority and responsibilities are
clearly specified. Both the World Bank and the ADB emphasized in favor of delegating
financial power to the procurement officials. They felt that there is scope for improving the
information disclosure system. Concepts like responsibility, transparency and good
governance exist in procurement guidelines of the World Bank and the ADB. If structural
deficiencies can be eliminated, level of ensuring efficiency of using IOTM procurement will
be enhanced.This study concludes that the total time required for invitation of tender, evaluation and
contracting is less than that of PPR 2008 of Bangladesh in the International Procurement of
works. According to the ADB Procurement guidelines 6 to 8 weeks are needed from
advertising to Evaluation and Contracting for the procurement of works internationally and
according to the WB Procurement guidelines, 6 to 13 weeks are needed from advertising to
Evaluation and Contracting for the procurement of works internationally.
On the other hand, according to PPR 2008 Procurement guidelines, 6 to 12 months are needed
from advertising to evaluation and contracting for the procurement of works internationally
which is too much. But the time required from invitation of tender to evaluation and
contracting depends on donors. The World Bank, ADB and JICA (Japan) takes less time
compared to others. SFD and IDB take more time for concurrence and approval.
So, for smooth implementation of projects having major and complicated works in public
sector of Bangladesh in general and for LGED in particular the existing time frame in the PPR
2008 for procurement through IOTM procedure should be reviewed.Kazi Abdus SamadM. Procurement and Supply Managemen
COMPARATIVE STUDY OF AGROGEOPHYSICAL METHODS FOR IDENTIFYING SOIL PIPES
No full textSoil erosion is considered the greatest challenge for soil management and agri-food production threatening human habitat and livelihood. Although soil erosion due to surficial processes has been well studied, the role of the subsurface process such as internal soil pipes has often been overlooked. Internal soil pipes directly contribute to total soil loss in agricultural fields that severely threaten agricultural sustainability. Locating, measuring, and mapping internal soil pipes and their networks are vital to assess the total soil loss in agricultural fields. Internal soil pipes are not commonly visible at the surface, and their subsurface networks rarely follow the surface topography. The hidden and uncorrelated nature of occurrences narrows down the applicability of manual and remote sensing-based techniques. Non-invasive agrogeophysical methods can overcome these limitations by providing detailed subsurface pictures with high spatial resolution. In this research, the applicability of four agrogeophysical methods i.e., seismic refraction, electrical resistivity (ER), ground-penetrating radar (GPR), and acoustics for precise detection of internal soil pipes is presented. The measurements are taken from an experimental field site with established internal soil pipes. Agrogeophysical signatures are later verified with the results of the cone penetrologger (CPL) invasive method. These verified agrogeophysical signatures provide significant insights into the spatial position and distribution of internal soil pipes. Signatures of agrogeophysical methods are presented in cross-sections and 2D Plan view maps. Cross-sections show the spatial location of soil pipes, whereas 2D plan view maps predicted the distribution of internal soil pipes networks and their path
EFFECT OF STEM PRUNING ON YIELD AND YIELD CONTRIBUTING CHARACTERS OF CHERRY TOMATO IN SOILLESS CULTURE
No full textA Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka,
In Partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE
IN
HORTICULTUREA pot experiment was conducted in the semi-greenhouse at the Horticulture Farm of Sher-e- Bangla
Agricultural University, Dhaka 1207, Bangladesh, during October 2019 to March 2020 to investigate
the effect of stem pruning on yield and yield contributing characters of cherry tomato in soilless
culture
. The experiment consisted of three level of pruning viz. P
ii
0
= No pruning; P
= One stem
pruning and P
2
= Two stem pruning and four different cherry tomato varieties viz. V
= BARI
Tomato-11; V
2
= BARI Tomato-20; V
3
= Red Star and V
= SAU Tomato-2. There were 12
treatment
combinations and experiment were setup in Completely Randomized Design (CRD) with three
replications. In case of pruning, the highest plant height, maximum branch number per plant,
maximum chlorophyll content, minimum days required for first flowering and first fruiting,
maximum flower cluster per plant, maximum fruit number per plant, highest single fruit weight (9.31
4
g), highest amount of TSS (9.46 degrees Brix) and yield per plant (2.37
kg) were obtained from P
treatment at 60 DAT. Similarly, in case of varieties, the highest plant height
, maximum branch
number per plant, maximum chlorophyll content, minimum days required for first flowering and first
fruiting, maximum flower cluster per plant, maximum fruit number per plant, highest single fruit
weight (8.50 g), highest amount of TSS (8.92 degrees Brix) and yield
per plant (2.63 kg) were
obtained from V
treatment at 60 DAT. In combined effect, the highest plant height
, maximum
branch number per plant, maximum chlorophyll content, minimum days required for first flowering
and first fruiting, maximum flower cluster per plant, maximum fruit number per plant, highest single
2
fruit weight (12.42 g), highest amount of TSS (10.53 degrees Brix
) and yield per plant (2.98 kg) were
obtained from V
2
P
2
treatment. Among the treatment combination, V
2
P
(BARI Tomato-20 variety
with two stem pruning) treatment seemed to be
more promising for obtaining the maximum yield of
cherry tomato
Development of a canopy stress method for large eddy simulation over complex terrain
No full textHigh-fidelity Large-Eddy Simulation (LES) of fluid flow over complex terrain has long
been a challenging computational problem. Complex terrain leads to increased velocity
gradients, turbulence production, and complex turbulent wakes. Body-fitted grids need a
high resolution to deal with additional effects of highly skewed cells that follow a terrain
of steep slope. Immersed boundary methods need special techniques like wall models to
numerically resolve the associated drag force. In flow over complex terrain, the characteristic
scale decreases locally which makes it a challenging endeavour for LES to mimic
the turbulent energy cascade, particularly when steep terrain produce vortices and streaky
structures that sustain turbulence away from the surface.
This thesis presents the canopy stress method in which the terrain is immersed into the
fluid, cutting the cells of a Cartesian grid, where the effects of terrain are treated by the
form drag and the skin friction drag. Heat transfer analysis of flow in pipes and porous
media is considered to study the sensitivity of canopy drag coefficients. A scale-adaptive
methodology is proposed to model the subgrid-scale terrain effects. The analysis of wind
tunnel measurements over mountains and forests shows that the scale-adaptive model dynamically
adjusts the dissipation rate by the scale of energetic eddies near complex terrain.
In regions without terrain effects, where subgrid turbulence is locally isotropic, the model
also provides accurate dissipation rate. These results suggest that combining the rotation
tensor and the vortex stretching vector with the strain tensor through the second-invariant
of the square of the velocity gradient tensor is a novel approach to improve the fidelity of
LES over complex terrain in which the dissipation becomes scale-aware; i.e. the rate of
turbulence dissipation is adjusted with the changes in the characteristic scales. The numerical
analysis of four distinct flow regimes (e.g., Chapters 3-6) illustrates the accuracy,
simplicity, and cost-effectiveness of the proposed LES methodology.Includes bibliographical references (pages 103-115)
EFFECT OF NITROBENZENE ON GROWTH AND YIELD OF BOTTLE GOURD (Lagenaria siceraria L.)
No full textA Thesis
Submitted to The Department of Horticulture,
Faculty of Agriculture
Sher-e-Bangla Agricultural University, Dhaka
In partial fulfillment of the requirements
for the degree of
MASTERS OF SCIENCE (MS)
IN
HORTICULTUREThe experiment was conducted in the Horticultural Farm of Sher-e-Bangla
Agricultural University, Dhaka, Bangladesh. The experiment consisted of two factors.
Factor A: Different concentrations of nitrobenzene as C
II
0
= Control (Water only), C
=
Nitrobenzene @ 2 ml/L, C
2
= Nitrobenzene @ 3 ml/L and Factor B: N
= One spray,
N
2
= Two spray, N
= Three spray in the growing period. The experiment was laid out
in a Randomized Complete Block Design with three replications. In case of different
concentrations of nitrobenzene the maximum number of flower (male 51.06 and
female 40.18), the highest number of fruit harvested per plant (10.95) and the highest
yield (55.69 t/ha) were found from C
3
1
1
treatment, whereas the lowest from C
treatment. For number of spray the highest number of flower (male 49.02 and female
38.05), the maximum number of fruit per plant (10.32) and the highest yield (52.94
t/ha) were recorded from N
3
treatment, while the minimum were from N
treatment.
Due to combined effect, the maximum number of flower (male 57.78 and female
47.12), the maximum number of fruit harvested per plant (12.55), the highest yield
(63.38 t/ha) with net income (Tk. 587384.7) and BCR (2.23) were observed from
C
1
N
3
treatment combination, while the lowest were from C
So, economic analysis revealed that the C
1
N
3
0
N
1
1
treatment combination.
treatment combination appeared to be
the best for achieving the higher growth, yield and economic benefit of bottle gourd
Development of an experimental setup for analyzing the influence of Magnus effect on the performance of airfoil
No full textCorrelation between brain's adjoin and diverse hemisphere for motor imagery task relating to central and peripheral nervous system
No full textMolecular dynamics simulations of the binding stability of selected terpenes towards NS5B RNA polymerase from hepatitis C virus.
No full text These MD simulations are described in " Tomasz M. Karpinski, Marcin Ozarowski, Pedro J. Silva , Mark Stasiewicz, Rahat Alam and Abdus Samad (2023) Discovery of terpenes as novel HCV NS5B polymerase inhibitors via molecular docking Pathogens, 12:842 "
xxx.zip contains PDB files of every complex throughout the molecular dynamics simulations, taken at 2.5 ns intervals (simulation time). Filenames follow the format xxxx_nnn.pdb , where xxx is the ligand name and nnn is equal to simulation_time (in ns) divided by 0.25.
RMSD.zip contains the tables with the RMSD values of protein and ligand upon comparing each complex snapshot with:
A) its initial structure (xxx_RMSD_vs_0.tab)
B) its structure after 25 ns simulation time (xxx_RMSD_vs_100.tab)
C) its structure after 75 ns simulation time (xxx_RMSD_vs_300.tab)
D) its structure after 150 ns simulation time (xxx_RMSD_vs_600.tab)
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