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지관용 파이프절단기에서 개선을 고려한 절단궤적 관한 연구
이욱진(Wookjin Lee),김화일(Hwail Kim),이준우(Junewoo Lee),임근호(Geunho Lim),노태정(Taejung Lho) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
The pipe coasters is applied to the shipbuilding equipment and heat exchanger that used in various fields. Faster than the existing methods and the process can be applied to following process, without postprocessing. Design equations of profiling shape and generates cutting path applicated 3-axises consists of a, X, and β-axis.
나정연(JeongYeon Na),권민지(Minji Kwon),김두영(DooYoung Kim),박영화(YoungHwa Park),서정은(JungEun Seo),신민철(MinCheol Shin),김희지(HeeJi Kim),김화일(HwaIl Kim),류향우(Hyangwoo Ryu),조만수(ManSu Cho) 한국환경보건학회 2017 한국환경보건학회지 Vol.43 No.5
Objectives: The rate at which the nationwide highway is outsourcing the duties of toll gate cashiers to the public is increasing. The aim of this study is to conduct research on job stress for the rate at which the fares are collected by national highway toll gate cashiers. Methods: The population selected was a statistically significant group making up 10% of the total number of people surveyed in 2015, with a population of approximately 5,495 persons. The sample size is intended to cover the maximum sample size of 550 samples and the maximum number of samples that should be obtained. After allocating the number of samples by quota allocation, the qualitative function of Quality Function Deployment (QFD) was applied by random sampling. Results: Job stress ranked at 46.6 ± 11.5 points was found to be under the stress of 50% reported in other occupations. Job stress items showed higher for “job instability” compared to other types of tasks. Also, it appeared lower in “conflict in relationships.” This is a result of the work characteristics of highway service operators. Conclusions: Time was found to have the highest influence on the workload (β = 0.80, p. 0.001), which calls for a reduction in time and workload. est influence on the workload (β = 0.80, p. 0.001), which requires a reduction in time and workload.