1,721,029 research outputs found
Advancement in remote sensing of wind energy
No full textAzad, M ORCiD: 0000-0001-8258-6057In modern applications, wind turbines are gaining in height and becoming larger in size, as well as being installed in complex, mountainous, and hilly terrain to produce large amounts of energy for neighboring populations and industries. However, one must keep in mind that the efficiency of a wind farm is greatly affected by inaccurate wind resource assessment. Therefore, it is necessary to investigate wind resource potential to estimate how much energy is available at the site and how much power the wind turbine can produce, because the power output of a wind turbine scales cubically with the available wind speed. In this case, to achieve the highest possible efficiency from a wind farm and to install modern machines of even larger heights, it becomes necessary to study and precisely estimate wind resource potential and its economic feasibility. The investigation of wind resource at larger heights and at complex wind farms requires a more physical volume-based measurement. Ground-based remote-sensing techniques such as light detection and ranging and sound detection and ranging are becoming increasingly useful and popular in the wind energy sector for resource assessment as they help in reducing complexity, uncertainty, and technicality in modern wind farm development, because they provide volume measurement and measure the entire rotor field from top to bottom at each height, particularly at higher hub height, which is difficult to do using conventional techniques, traditional techniques, or meteorological mast techniques. The meteorological mast consists of a cup anemometer and other measuring instruments to measure wind speed and wind direction. Using meteorological mast is not a representative idea as it gives point and fixed measurements, and empirical equations such as power law and log law are used to convert wind speed measured at 10 m or 30 m to larger heights of 100 m, 120 m, or more. This chapter is focused on increasing confidence in the result of remote-sensing measurement. Most importantly, there is economic merit in determining the total amount of cash flowing on wind resource assessment using advance different techniques
Metabolic and oxidative stress chareteristics of broiler chicken skeletal muscle under chronic heat stress conditions and their possible regulation by electrolyzed-reduced water
Full text link博士学位論文の要旨及び審査結果の要旨 (Summary of Thesis(DR))othe
Steady MHD Free Convection and Mass Transfer Flow with Thermal Diffusion, Hall and Ion Slip Currents and Large Suction
No full textThis thesis is submitted to the Department of Mathematics, Khulna University of Engineering & Technology in partial fulfillment of the requirements for the degree of Master of Philosophy in Mathematics, April 2006.Cataloged from PDF Version of Thesis.Includes bibliographical references (pages 55-56).The present study is concerned with the study of steady MHD free convection and mass transfer flow past an impulsively started infinite vertical porous plate with thermal diffusion when a strong magnetic field of uniform strength is applied transversely to the direction of flow. The Hall and ion slip currents are taken into account. The effects of rotation on the flow are also considered. Similarity transformations are used to transform the governing partial differential equations into a system of ordinary differential equations. The ordinary differential equations are then solved by perturbation technique based on large suction. The velocity and temperature profiles are shown graphically and results are discussed in terms of Hall parameter f3, ion slip parameter Di and other established parameters.Md. Abul Kalam AzadMaster of Philosophy in Mathematic
Factors influencing adult gonad production and larval growth and survival of the purple sea urchin (Strongylocentrotus purpuratus)
No full textThe continued demand for sea-urchin gonads and overexploitation of natural stocks in many countries have stimulated interest in the aquaculture of various sea-urchin species. The overall aim of this thesis was to develop rearing protocols for larval and adult purple sea urchins (Strongylocentrotus purpuratus). The specific objectives of this thesis were to determine: (1) the effect of temperature and diet on adult gonad production and (2) the effect of temperature, microalgal diet, ration, and stocking density on embryonic/larval growth and survival. To test these objectives I measured ingestion rate, gravimetric absorption, assimilation efficiency, and various gonad attributes (i.e. wet weight, water content, gonad index, texture, firmness, colour, flavour, and maturity stage) in the experiments using adult sea urchins and developmental progression from egg to prism stage, embryo length, larval length, larval mid-line body length, larval body width, larval post-oral arm length, time to reach metamorphic competency, and survival rate in the embryo/larval experiments. Adult purple sea urchins produced the highest quality gonads at 12°C when fed a prepared diet developed specifically for urchin gonad production by the Norwegian Institute of Fisheries and Aquaculture. Embryos and larvae showed more normal development and had significantly higher percent survival when reared at 11 and 14°C than at 8 and 17°C with best growth and survival occurring at stocking densities ≤100 ind ml⁻¹ of eggs/embryos and ≤1.0 ind ml⁻¹ of larvae. The single-species algal diet of Dunaliella tertiolecta and the bi-species diet of D. tertiolecta and Isochrysis sp. supported the highest larval growth and percent survival of all phytoplankton diets evaluated. Larvae fed an increasing diet ration (i.e. 2,500–10,000 cells ml⁻¹, according to developmental stage) of a mixed-species algal diet (D. tertiolecta and Isochrysis sp.) generally had significantly better growth and survival than any fixed rations (i.e. same ration throughout development) evaluated. Overall, the results from this study suggest that S. purpuratus could be an excellent potential candidate species for aquaculture development.Land and Food Systems, Faculty ofGraduat
Metabolic and oxidative stress chareteristics of broiler chicken skeletal muscle under chronic heat stress conditions and their possible regulation by electrolyzed-reduced water
No full textVALUE CHAIN ANALYSIS OF POTATO IN SELECTED AREAS OF MUNSHIGANJ DISTRICT
Full text linkA Thesis
Submitted to the Faculty of Agribusiness Management,
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE
IN
AGRIBUSINESS & MARKETINGA series of value-generating activities associated with product marketing
from farm level to the ultimate consumer referred to as the value chain. In
Bangladesh potato value chain starting from producer then there may
have many intermediary channels like potato producer, Faria, Bepari,
Wholesaler, Retailer, and Consumer etc. . The study was conducted at
sirajdikhan upazila under Munshiganj distric
to identify the actors involved in value chain and their function in potato
marketing, to estimate the value addition of potato by the actors in potato
market, to estimate the seasonal price fluctuation of potato in the study
area, to identify the constraints of potato marketing and suggest measure
for the improvement of potato marketing in the selected area. The
selected samples included 6
Tourism to Pilgrimage Sites in Bangladesh: A Sustainability Framework
No full textUsing three Mazar (Sufi tomb) sites in Bangladesh – of Lalon Fakir, Khan Jahan Ali and Shah Jalal, the study examines pilgrimage tourism. Adopting a mixed-methods approach with a survey and interviews, the analysis reveals that pilgrims are drawn to the sites in search of spirituality and interconnectedness with nature which also puts aside materialism and consumerism. The study also explains the significance of pilgrimage tourism as supporting local communities and cultures and contributing to their sustainability
Absenteeism amongst Bangladeshi pupils in Westminster
No full textEThOS - Electronic Theses Online ServiceGBUnited Kingdo
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