Informatics Publishing Limited

Vinitha Krishna ¹, K. Sunitha ¹

Affiliations
1 Department of Electrical Engineering, National Institute of Technology, Calicut – 673601, Kerela, IN

Abstract

Background/Objectives: Transients in the overhead power lines due to lightning events can be caused by both direct and indirect strokes. Both direct and indirect events can cause severe issues in the power system. Methods/Statistical Analysis: The frequency of the indirect lightning return strokes is more when we consider the lightning studies on the overhead lines considering the height of the present distribution and transmission lines. Lightning-induced voltages on the overhead transmission lines have been computed using the finite-difference time-domain method. A source of lightning surge wave on power transmission lines is modelled as a double exponential wave using Modified Transmission Line with Exponential current decay (MTLE) model. Computation of overvoltage caused by lightning waves is calculated for single conductor lines with and without considering the soil reflections taking into account the dynamic characteristics of soil under lightning conditions. Findings: Computations are carried out for the various configurations of multi-conductor transmission lines. The effectiveness of the protective devices such as shield wires is also studied here. The surge arrester modelling is carried out and the design parameters for these protective devices are finalised after optimization. MATLAB and PSCAD software are used for simulation. Triangular configuration gave a better response to lightning than the horizontal and vertical configuration. Applications/Improvements: A 3D approach on the problem with use of COMSOL will give a better insight on the field pattern.

Keywords

Kaizen, Manufacturing Organizations, Manufacturing Performance, Total Productive Maintenance (TPM), Total Quality Management (TQM)

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G. Madhan Mohan ¹, P. S. S. Prasad ², K. Sunitha ²

Affiliations
1 Dept. of Prod. Engg., PSG College of Technology, Peelamedu, Coimbatore, IN
2 Dept. of Mechanical Engg., PSG College of Technology, Peelamedu, Coimbatore, IN

Abstract

Manual work is still customary in many Indian foundries. They provide ample employment opportunities, nevertheless physically intensive. The study aims (a) to carry out a survey with an appropriately designed questionnaire amongst Indian foundry workers; and (b) to identify most risky activities using statistical analysis. This study also attempts to establish a logistic regression model to relate the probability of worker facing an accident with demographic data of the worker. Fifty-eight foundry workers were interviewed individually. The study revealed that there is a 92.9% risk in 'Discharging of liquefied metal from furnace to ladle', followed by 'Transfer of molten metal from one furnace to another' with an 88.9% risk. The study has brought forth the major hazardous work in a foundry, such that necessary focus can be directed to reduce occupational health issues amongst workers.

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T. Anitha Kumari ¹, K. Sunitha ², Azeem Unnisa ²

Affiliations
1 CSE, Hyderabad Institute of Technology and Management, Hyderabad, Telangana, IN
2 ECE, Hyderabad Institute of Technology and Management, Hyderabad, Telangana, IN

Abstract

The importance and effectiveness of faculty training programs to enhance and elevate faculty members' professional abilities in teaching are well documented in the literature knowledge based on a subject matter is not enough to claim competency in teaching. Besides subject matter, teaching professional competency requires additional "nonacademic" knowledge (i.e. social, administrative and technical). This analogy for faculty competency was supported in a report developed by Hendriks, M et.al. [4] [2010]. EPICS (Engineering Projects In Community Service).There is a need of skilled faculty, this paper describes about learning's of the epics faculty from a failure project. The method which followed is the epics design process and the result showed that a lot of learning's happening in the process of developing a project. Though the project has failed but we could gain immense experience through this project. The present paper gives an insight into our experience.

Keywords

EPICS, Learning’s, Faculty Training, Design Process, Experience.

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