Unnatural working postures usually cause musculoskeletal problems for workers in work field, especially in traditional industry. Many analysis and survey methodologies…
Unnatural working postures usually cause musculoskeletal problems for workers in work field, especially in traditional industry. Many analysis and survey methodologies have been developed to identify unnatural postures and disorder risks in workplaces. The Ovako Working Posture Analyzing System (OWAS) and Nordic Musculoskeletal Questionnaire (NMQ) are the representative methods and applied widely. This study applied the both tools to investigate the work field of a manufacturing factory of the water heater’s case. We divided the manufacturing process into nine workshops, took the pictures of working motions by DV camera and analyzed the postures on OWAS. From the OWAS results, we could identify the risks level of musculoskeletal symptoms as four Action Categories (AC). And from the comparison of OWAS and NMQ results, we could provide the suggestions to improve the working methods and environment. From the results of OWAS, we found that the operators) head/neck and back were above AC3 in some workshops. If the situation continued in long period, the operators might have the risk to get musculoskeletal symptoms. From the investigation of NMQ, we also found that the percentage of aches on neck, shoulders and lower back were higher than other parts of body. The correlation between aches and jobs was more than 75 per cent. So we provided some suggestions to improve: work rotation and adjustment of work surface/height to fit in with Ergonomics. Then the risks of musculoskeletal symptoms would be reduced.
The purpose of this study was to analyze the prevalence of self‐reported musculoskeletal symptoms among the three Taiwan’s traditional industries as lathe, electronics and…
The purpose of this study was to analyze the prevalence of self‐reported musculoskeletal symptoms among the three Taiwan’s traditional industries as lathe, electronics and food by the Nordic Musculoskeletal Questionnaire (NMQ). Moreover, the study was also to make a comparision among the aforesaid industries for revealing their differences. The result of the questionnaire indicated that the symptoms appeared on the three industries were all originated from four parts as neck, shoulders, elbows, and wrists/hands. More than 68 per cent of the interviewers’s thought that their symptoms might be related to their work. However, the rate of harmful influence resulted from life or job was over 50 per cent. As to the respect of the interviewers’ attitude in treating their symptoms, more than 80 per cent of them neglected or just treated the symptoms by massaging or cold/hot compressing and resting. From the questionnaire, the proportion of symptoms discussed in each item inicated that the distribution, in perceiving symptom, of interviewers were not quite identical; however the Chi‐square test discovered majority did not reach 0.05 levels, hence the difference among industries were not significant.
Research has exposed a gap in satisfaction and expectation between management, employees, suppliers, customers and society. To bridge the gap, total quality management…
Research has exposed a gap in satisfaction and expectation between management, employees, suppliers, customers and society. To bridge the gap, total quality management experts suggested various techniques. The author suggested closing the gap between needs and expectations of employees and those of their leaders. To survive in a dynamic environment, leaders must learn to meet the needs and expectations of their employees who can, in turn, meet customers’ needs. This research aims to provide organizations with a technique known as “motivation audit.” It is an approach to uncover and learn to understand the underlying significant needs and expectations of employees. In order to direct the whole organization toward continuous product and process improvement, the leaders must be aware of the underlying factors that motivate their employees. Otherwise, tangible benefits may take a considerable time to surface in spite of the commitment of management to train essential management and staff.
In the literature of family business, certain management activities, styles and characteristics have been most frequently examined. Yet no prior research focusing on the…
In the literature of family business, certain management activities, styles and characteristics have been most frequently examined. Yet no prior research focusing on the relationship between these family businesses variables has been found. This is a survey‐research correlation study of 149 family businesses. Of the twelve variables studied, twenty of the sixty‐six correlations were found to be significant. Major findings are the consistent use of professional management activities, styles and characteristics in family businesses, and that using non‐family members within top management does not significantly increase the professionalism of management of such businesses.
Discusses the 27 papers in ISEF 1999 Proceedings on the subject of electromagnetisms. States the groups of papers cover such subjects within the discipline as: induction machines; reluctance motors; PM motors; transformers and reactors; and special problems and applications. Debates all of these in great detail and itemizes each with greater in‐depth discussion of the various technical applications and areas. Concludes that the recommendations made should be adhered to.
This paper aims to develop a new quasi-three dimensional (3D) analytical model devoted to the study of nonlinear transient magneto-thermal coupled problems in permanent…
This paper aims to develop a new quasi-three dimensional (3D) analytical model devoted to the study of nonlinear transient magneto-thermal coupled problems in permanent magnet (PM) transverse flux induction heating device (TFIHD).
The presented work is based on analytical development of strongly coupled problem, including electromagnetic and thermal boundary problems. The electromagnetic problem is first solved by using the separation variables method to evaluate the induced currents in the nonmagnetic plate and the resulting power density loss distribution. The plate temperature profile is then obtained thanks to strong involvement of this magnetic model in a new analytical thermal model combining the separation of variables method and the Green’s functions transient regime analysis method. The coupled model is then used in a simulation procedure of the magneto-thermal process allowing taking into account the workpiece electrothermal nonlinear properties. The developed coupled model is validated by computing the performances of the studied PM TFIHD and comparing them to those obtained by finite element simulations.
An efficient transient quasi-3D magneto-thermal analytical model is developed allowing rapid analysis of PM induction heating for core heating of parallelepiped parts. The developed model also allows fast and accurate simulations of nonlinear and transient three dimensional (3D) magneto-thermal phenomena for planar induction heaters.
Research limitations implications
The developed quasi-3D magneto-thermal analytical model is limited to design induction heating devices of planar structure with PM inductors.
A new transient quasi-3D magneto-thermal analytical model accounts for non-linearity and edge effect and helps to fast study and fast design of linear permanent magnet induction heating device.