Assessment of Extremely Low Frequency Magnetic Fields Associated with Industrial Sewing Machines

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International Journal of Research and Scientific Innovation (IJRSI) | Volume VII, Issue I, January 2020 | ISSN 2321–2705

Assessment of Extremely Low Frequency Magnetic Fields Associated with Industrial Sewing Machines

Ocheni A. U. U.1, Genesis J. E.2

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1,2Department of Physics, University of Maiduguri, P.M.B. 1069, Maiduguri, Borno State, Nigeria

Abstract – This study assess the level of extremely low frequency magnetic fields associated with industrial sewing machines using the Trifield Metre, and the exposure of tailors was assessed in accordance with the American Congress of Industrial Hygienists (ACGIH) and International Commission on Non-Ionizing Radiation Protection (ICNIRP).The formulation used in this survey is the current density which is an important factor to evaluate the biological effects associated with exposure to extremely low frequency magnetic fields. In this paper a standard of the human femur is considered. Data analyses were conducted and the maximum arithmetic mean of the magnetic fields from the survey was found to be 10µT and a value of 0.43µT was the minimum. In none of the situations does exposure of tailors to ELF-MF exceed the threshold limits recommended by ACGIH. While the maximum induced current density around the human femur bone from the survey was computed to be 64.3 nA/m2 and the value of 2.8 nA/m2 was the minimum current density. The maximum computed value for induced current density for the human femur bone was found to be far less than the recommended reference value of 10 mA/m2 set by ICNIRP.

Key words – Magnetic Fields, Extremely Low Frequency, Human Bone Marrow Stromal Cells/ Human Skeletal Stem Cells,Industrial Sewing Machines and Trifield TM100XE Metre.

I. INTRODUCTION

The wearing of clothing is exclusively a human characteristic and is a feature of most human societies. It is not known when human began wearing of clothes but anthropologists believe that animal skins and vegetation were adapted as protection from weather conditions. Clothing and textiles have been important in human history. They reflect the material available in different civilisation at different times. They also reflect upon the technologies that had been mastered in due course of time [6].Sewing (the craft of fastening or attaching objects using stitches made with a needle thread) for thousands of years have been done by hand, where the first needles were made from bones or animal horns and the threads made from animal sinew. The invention of sewing machines in the 19th century and the rise of computerisation in the 20th century led to mass production and export of industrial sewing machines across the globe [9].