European Journal of Advances in Engineering and Technology

1-4

Authors: A Jafarimoghaddam and S Aberoumand

This study deals with predicting a correlation for power law parameter for Non- Newtonian behavior of silver/ heat transfer oil nanofluid by using the acquired data of the previous work by Aberoumand et al. In this work the data of figures related to apparent viscosity versus shear rate were used to derive a formulation to predict power law parameter as a rheological parameter for silver/ heat transfer oil nanofluid. Based on this correlation, power law parameter depends on volume fraction and bulk temperature variables.

12-19

Authors: Amber Batwara

The aim of this study is to numerically simulate to turning process in real time environment with FEM explicit software. Three input factors (depth of cut, cutting speed and rack angle) and two responses (stress and strain) are selected for simulation work. DOE technique (Taguchi) is used for making relationship among factors and responses. Surface response methodology is used for this study using MINITAB software to identify most or less significant input factors after that apply regression modeling to develop relationship between input parameters and output results in form of linear model equations based on regression modeling. Signal to noise analysis is performed to predict the effect of changing of factors according to their levels to find effect on product quality. On the basis of simulation work stress is dependent on Depth of cut and rack angle.

28-32

Authors: Dakuri Arjun, Lolla Renuka Tejaswini, J Hayavadana and Susheel

Denim is a most popular dress material that has acclaimed most popularity in the past three decades from special wear to regular wear; denim has barged into acceptance of kid, women and men and has become a most preferred dress irrespective of age in India and world. The present day trend indicates that consumer is interested to wear denim and feels more comfortable. An insight into the literature reveals that work on improving the comfort using KMnO4 is sparse and this paper examines the role of Potassium permanganate finish to improve comfort properties. Denim fabric was treated with different levels of potassium permanganate finish using pad -dry -cure method. Finished product was characterized for comfort, aesthetic properties and tear strength. Results were significant at 95 % of confidence level and showed that fabrics treated with 12 gpl offered highest flexural rigidity, crease recovery angle and abrasion resistance but offering lower tear strength values on comparison with other fabric samples.

44-49

Authors: Subrata Talapatra and Md. Habibur Rahman

Though the economy of Bangladesh stands on the garments sector and the largest profit earning sector by exporting the products of the garment industry, the manpower of that sector are most deprived from their minimum rights even they are paralyzed by physically and mentally gradually. Millions of workers in more than 5000 garments industries are suffering from numerous problems. Habitation system, imbalance diet and tight economy condition make them compel to lead a hazardous life even to the way of death. The causes of the health hazards including the industrials production, dyeing, washing and others sectors that involved the effect of cotton dust, chemical reagents, poor ergonomic design and others are integrated in this paper. This paper also shows the severity of cotton dust on the human body and a survey on the worker’s health hazards in percentage of the different problems and diseases. Finally, this paper concludes by highlighting some remedial ways to take attention of the management of the garments industry and their self-awareness that will be the catalyst to take prevention against their health hazards.

55-61

Authors: Md. Sanowar Hossain, Nur-E-Zannat, UmmeAftahaune Mohana and Md. Mosharraf Hossain

This paper determines a procurement strategy where demand over a finite planning horizon is uncertain. Demand variations make forecasting and inventory management more difficult and tend to increase inventory levels which emphasis on proper procurement strategy. Here procurement strategy is developed by considering limited approved suppliers and multiple products. It is assumed that the suppliers are approved for the case with limited capacity but not free from imperfect quality. Defective items from supplier are sold at a discounted lower price. Some critical parameters for determining optimal procurement strategies like maximum storage space for the buyer, standard deviation of lead time demand and the corresponding product dependent compensation cost for imperfect quality are also considered here where an order is placed on a supplier depend on transaction cost for each period. Here shortage or backordering is not allowed. To make such problems realistic, the triangular possibility distribution of fuzzy numbers and the concept of minimum accepted level method are employed to formulate the problem. The whole mathematical model is structured and represented as linear programming model and was solved by an efficient meta-heuristic algorithm (Genetic Algorithm). Some computational studies were also carried on to prove its acceptance in the real world.

67-70

Authors: Dibin Mary George, VA Libimol, S Sreenath,P S Sreekala and C K Aanandan

Radiation Characteristics of a circular sector micro strip antenna (CSMA) designed for the 60 GHz millimeter-wave bandan application is presented in this paper. The proposedantenna consists of a circular patch with sector slot excited by micro stripfeeding technique.Substrate material chosen here is the Kapton which is a polyimide used in high performance flexible printed circuit and thermal blankets on satellites, and various space instruments.Parametric studies have beenperformed for optimizing the different parameters such as slot angle, Feed point etc. for the best possibleresults. The proposed antenna configuration resulted in abandwidth of 1.47 GHz covering the frequency rangefrom 59.26 to 60.73 GHz, with a gain of 8.0334 dB at the60 GHz resonance frequency.The CSMAproposed is characterized by its ease of manufacture, itsminiature dimensions and its simple design. The presence of slot makes impedance variations along the circumference so that the antenna can be fed using a micro strip line.

78-80

Authors: GK Solanki, YA Patel and MK Agarwal

Single crystals of p-type WS2 and WS1.9 have been grown by a Physical Vapour Transport (PVT) technique. DC electrical resistivity measurements have been made along the c-axis in both these crystals. Electron microscopic examinations revealed the presence of large concentration of defects in these crystals. The observations described in this paper clearly indicate how far two dimensional these layered crystals can be considered.