European Journal of Advances in Engineering and Technology

9-15

Authors: Mutegi AM, Kihato PK, Muriithi CM and Saulo MJ

Voltage stability challenge in power systems remains one of the major concerns in system planning and operation. The ability of a power system to maintain acceptable voltage levels at all buses in the system under normal operating conditions and during contingencies pose a major headache for power system researchers and practitioners. As power systems become more complex, coupled with environmental concerns, land scarcity and huge capital requirements in doing of new power lines and substations, voltage instability becomes an increasingly serious challenge that requires out of the box solutions. FACTS devices is a group of highly flexible and versatile controllers that regulate active and reactive power flows in real time to enhance system controllability and increase the power transfer capability. The UPFC is one of the most complex and versatile FACTS devices that shall be used in the research. Proper knowledge of how close the actual system’s operating voltages are from the voltage stability limits is crucial for the optimal placement of FACTS devices. This research uses static methods, namely the Voltage Stability indices for optimal placement of the FACTS devices for security-constrained voltage stability improvement. The research shall be done by the use of Power System Analysis Toolbox (PSAT) software that runs on MATLAB’s environment on the IEEE 39-Bus 10-Generator test system.

24-27

Authors: Baban Parisa Dathwade

This paper describes the Decision-making is the most important job of management and we can say that good decision-making ability is the key to a successful career in management. Management without decisions is like a man without a backbone. A case study is conducted in Bahubali College of Engineering, Shravanabelagola, Hassan, Karnataka, India to know the decision-making the ability of the staff (male and female) and the students (male and female). Consider 5% of the college population for the study i.e. out of 800 students and staff. In this case, the study considered 40 as the sample size. As there are four groups of staff male, staff female, student male and student female for the uniformity we have selected 10 respondents from each group. The responses of 40 respondents from four groups are then and analyzed using a rating scale.

34-37

Authors: Rahmatullah Ibrahim Nuruddeen and Aminu M Nass

In this study, a recent added member of the integral transform family the ‘Aboodh transform’ is coupled with the Adomian decomposition method to solve linear and nonlinear heat conduction equations in what we called the Aboodh decomposition method. The Aboodh decomposition method works perfectly for both the linear and nonlinear heat conduction problems considered, and the results obtained are in full covenant with what is obtained in the literature.

43-46

Authors: Daha S Aliyu, Yusuf Abdulfatah Abdu and Danjuma A Yusuf

This paper discussed the general, problem of ground vibrations generated by road construction, operation methods generated due to road traffic and rail on the soil surface caused by different operations. Vibrations are one of many environmental factors that act on a building and potentially reduce their lifetime. Traffic induced vibrations, which are transferred through the ground, may interfere with the proper operation of vibration sensitive equipments. Vibrations are most frequently blamed for deterioration of historical buildings, there number of common vibration sources like road and rail traffic, earthquake.

53-57

Authors: Ahmad Mukhtar, Umar Shafiq, Kanwal Shafique and Masooma Qizilbash

This scientific research presents a study of Fluidization and De-Fluidization of different packing materials which are classified according to the Geldart’s Classification in a fluidized bed reactor in order to estimate the minimum Fluidization and De-Fluidization velocities and pressure drop of different materials like sand, wheat, flour and milk powder. For this purpose experiment is carried out in a fluidized bed reactor and on the different flow rates from minimum to maximum flow rates the height of bed and pressure drop is noted for Fluidization process and from maximum to minimum flow rates height of bed and pressure drop is noted for De-Fluidization for each packing materials. To analyze our experimental data graphical method is used and the results show that the minimum Fluidization and De-Fluidization for Milk Powder is 25.2 and 25, for Sand 25.1 and 25, for Flour 20.3 and 20, and for Wheat 29 and 29.1 liter per minute respectively. The results also show that the minimum fluidization velocity and de-fluidization velocities are increases as the particle diameter and density increases. The trend of increase in velocities is given by Wheat > Milk Powder > Sand > Flour. The pressure drop also increases as the flow rate increases but after a certain limit of flow rate it becomes constant for all four groups of particles.

71-77

Authors: Mainak Ghosal and Arun Kr Chakraborty

Cement reacts with water and derives its strength by its hydrated products. This hydration is a complex process; it takes usually 20-25 days for 90% of the hydration to get completed. But the long term complete hydration, generally takes a long time to complete. In this paper, an attempt has been made to study both the short term and long term effects of optimized Nanomaterial additions in ordinary cement mortar of cement: sand =1:3 ratios with water added as per the standard consistency as stipulated in IS 4031(Part 6):1988.Nanomaterials viz. Nanosilica (nS), Carbon Nanotubes (CNT) and Nano Titanium Dioxide (n-TiO2) were added in various dosages which is expressed as % with respect to the weight of cement added and were casted in 70.7mm cubes and tested for its cube strength in the laboratory, at various ages of cement mortar like 7 days,28days,90days,180days and 365days respectively. Optimizations were obtained out after studying the test results; for nS the optimization was found to be 0.75%, CNT optimization was found to be 0.02% and n-TiO2 optimization was found to be 1% w.r.to cement wt at 28 days i.e. these specific dosages got the maximum compressive strength in the cube testing machine. However the long term results showed different results except for n-TiO2.

85-89

Authors: Anuj Kumar Shrivastava, Mahesh Shahapure and Santosh Dalvi

The company Knorr-Bremse is a leader in braking systems in both rail and commercial vehicles. The concern always faced by company is survival of competition with various costing strategies. Voss connectors are one of the major components of assembly in products of the valves manufactured here and each product has a separate Voss assembly station. With the help of this project, the internal costs have been controlled and efficiency of the plant is considered. The main focus is on setting of common assembly station and then sending the valves to the assembly line for further operations. With the present work company could save on cost of assembly stations, operators, inventory, cost on maintaining spares for maintenance and the floor space consumed. The research work helped to save approximately 42 lakhs by just modifying the existing facility with no investments. Thus it contributes in the fight for the market share without modifying the product or compromising the quality.