http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/1603 2026-04-05T17:28:31Z 2026-04-05T17:28:31Z Das, Bimal Chandra http://dspace.daffodilvarsity.edu.bd:8080/handle/20.500.11948/952 2024-09-10T05:56:52Z 2012-07-01T00:00:00Z

Effect of Transportation Problem in Business and Economic Sector Das, Bimal Chandra . Transportation Problem Transportation problem is one of the sub-class of Linear Programming (L.P) problems in which the objective is to transport various amount of a homogeneous commodity, that are initially stored at various origins, to different destinations in such a way that the total transportation cost is minimum. _Its major application yin solving problems involving several product sources and several destinations of products, this type of problem is frequently called the Transportation Problem (T.P).

2012-07-01T00:00:00Z zaman, M. S Uddin, M. S. Masud, M.A. http://dspace.daffodilvarsity.edu.bd:8080/handle/20.500.11948/951 2019-05-29T05:07:39Z 2012-07-01T00:00:00Z

AN ANALYSIS OF THE EXISTING TECHNOLOGY AND COMPARE WITH CELLULAR NETWORKS: WIMAX zaman, M. S; Uddin, M. S.; Masud, M.A. Broadband access technology has significant influences in the telecommunication industry. Worldwide Interoperability for Microwave Access (WiMAX) is a broadband wireless technology which brings broadband experience to a wireless context. There are two different types of broadband wireless services. One is fixed wireless broadband which is similar to the traditional fixed line broadband access technology like DSL or cable modem but using wireless as a medium of transmission. Another type is broadband wireless known as mobile broadband which has additional functionality of portability, mobility and nomad city. The IEEE 802.16 family WiMAX is designed to accommodate both fixed and mobile broadband application. WiMAX promises "to solve the last mile problem which refers to the expense and time needed to connect individual homes and oflices to trunk route for communications. WiMAX also offer higher peak data rates and greater flexibility than 3G networks and Wi-Fi. This thesis is provides the analysis of the broadband wireless access (BWA) technology with a focus on WiMAX and compare it with the other wireless technology like Wireless Fidelity (Wi-Fi) and third-generation (3G).

2012-07-01T00:00:00Z Lawrence, P. Mathewsz, P. Koshy Deepanraj, B. http://dspace.daffodilvarsity.edu.bd:8080/handle/20.500.11948/950 2019-05-29T05:07:38Z 2012-07-01T00:00:00Z

EXPERIMENTAL INVESTIGATION 0N PERFORMANCE AND EMISSION CHARACTERISTICS OF Low HEAT REJECTION DIESEL ENGINE WITH ETHANOL As FUEL Lawrence, P.; Mathewsz, P. Koshy; Deepanraj, B. Depleting petroleum reserves on the earth and increasing concerns about the environment leads to the question for fuels which are eco-friendly safer for human beings. The objective of present work was to investigate the eflect of coating on piston, cylinder head, and valves on the performance of the engine and emission characteristics of exhaust gases using wet ethanol (5% water) as a fitel. A comparative study was carried out with the base engine for finding out ejfect of coating on engine components. The emission of NOX, HC and CO are recorded for constant speed mode and compared to that of base engine reading. The exhaust temperature is also recorded by using thermocouple. Because of the zirconia low thermal conductivity, high temperature resistance, chemical inertness, high resistance to erosion, corrosion and high strength, it is selected as a coating material for the engine components. For comparing the performance of the engine with coated components with the base engine, readings were taken before and afier coating. To make the diesel engine to work with ethanol a modification was done. The ethanol was sprayed in the inlet manifold and spark plug was erected on the engine head to facilitate the ignition. The engine ’s performance was studied for both wet ethanol and diesel with and without Zirconia coating. Also the emissions values are recorded to study the engine's behavior on emissions

2012-07-01T00:00:00Z Deepanrajl, B. Sankaranarayanan, G. Lawrencez, P. http://dspace.daffodilvarsity.edu.bd:8080/handle/20.500.11948/949 2019-05-29T05:07:41Z 2012-07-01T00:00:00Z

PERFORMANCE AND EMISSION CHARACTERISTICS OF A DIESEL ENGINE FUELED WITH RICE BRAN OIL METHYL ESTER BLENDS Deepanrajl, B.; Sankaranarayanan, G.; Lawrencez, P. The backbone of the economy of a nation is dependant of surface transport. Thus diesel engines play a vital role as prime movers. The recent energy trend offers a challenge as well as an opportunity to look for substitutes of fossil fuels for both economic and environmental benefits. Investigation and development of bio-fiiels as an alternative and renewable source of energy for transportation has become a major target in the effort towards energy self-reliance. Bio-fuel commands crucial advantages such as technical feasibility of blending, superiority from the environment and emission reduction angle, its capacity to provide energy security to remote and rural areas and employment generation. Moreover, Bio fuel will also provide rich bio mass and nutrients to the soil. This paper presents the results of performance and emission analyses carried out in an unmodified diesel engine fueled with rice bran oil methyl ester (biodiesel) blends with diesel. Engine tests have been conducted to get the comparative measures of brake thermal efficiency, specific fitel consumption and emissions such as CO, HC, NOx to evaluate the behavior of biodiesel and diesel in varying proportions. The results reveal that blends of rice bran methyl ester with diesel up to 20% by volume (ZOBD) provide better engine performance and improved emission characteristics.

2012-07-01T00:00:00Z