• Journal of the Korea Society of Computer and Information
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• v.15 no.10
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• pp.71-78
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• 2010

Even though various types of image segmentation methods have been extensively introduced, robustly segmenting images to environmental conditions such as illumination changes, shading, highlight, etc, has been known to be a very difficult task. To resolve the problem in some degree, we propose in this paper an environment-adaptive image segmentation approach using color invariants. The suggested method first introduces several color invariants like W, C, U, N, and H, and automatically measures environmental conditions in which images are captured. It then chooses the most adequate color invariant to environmental factors, and effectively extracts edges using the selected invariant. Experimental results show that the proposed method can robustly perform edge-based segmentation rather than existing methods. We expect that our method will be useful in many real applications which require edge-based image segmentation.

• The Journal of Korean society of community based occupational therapy
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• v.10 no.1
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• pp.1-15
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• 2020

Objective : The purpose of this study is to investigate the factors affecting occupational therapist's job stress through meta-analysis. Methods : In order to achieve the purpose of the study, 15 studies that examined job stress of occupational therapists were selected for analysis. The general characteristics of individual papers and the magnitude of the effect of related variables on job stress were calculated. The effect size of related variables on job stress and sub-factors (Fisher z) were calculated. Results : The results were found that the effect size on job stress was not significant in the variables of education level, salary and age. The largest effect size was found to be turnover intention (ES=1.161). There was no significant effect size in sub-factors of interpersonal conflict, organization system and insufficient job control. There was a significant effects in physical environment, lack of reward, job insecurity, job demand and occupational climate. Conclusion : The results of this study were suggested that an approach depending on sub-factors is needed to reduce job stress of occupational therapists. Satisfaction, burnout, and self-efficacy, which are psychological factors, are considered to be needed a program for psychological empowerment in order to reduce the job stress of the occupational therapist with a medium effect size according to individual sub-factors.

• Water for future
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• v.37 no.2
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• pp.82-89
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• 2004

과학적인 유역관리를 위한 모형개발 환경의 구현은 구체적인 방법론의 제시와 더불어 중요한 연구과제이다. 모형개발자들은 개발과정이나 표현과정, 모형의 보정 혹은 구동과정에서 빈번히 반복적이고 시간 소모적인 소프트웨어의 작업을 수행해왔다. 이 과정에서 상당한 시간과 자원의 낭비가 발생되었고, 많은 경우 개발된 모형이 일반화되는데 상당한 장애요인이 되었다. 또한 개발자들 상호간의 상이한 개발환경은 모형의 통합이나 상호검증에 긍정적으로 작용하지 못했다.(중략)

• Journal of the Korean Applied Science and Technology
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• v.41 no.3
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• pp.599-612
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• 2024

The purpose of this study is to impact of the physical risk factors of beauty workers on job burnout, presenteeism, and mental health and further verify the mediating effect of job burnout. Data were collected using questionnaires from 308 beauty workers in Seoul and Gyeonggi. The collected data were subjected to descriptive statistics, normality tests, confirmatory factor analyses, correlation, and structural equation model analyses, and mediation effect analyses were conducted using bootstrapping. The conclusions drawn through a series of research procedures are as follows. First, The physical risk factors of beauty workers were found to have a statistically significant effect on job burnout, presenteeism, and mental health. Second, job burnout was found to have a partial mediating effect in the relationship between the physical risk factors and the presnteeism of beauty workers. The results of this study can be used as basic data to raise awareness of the seriousness of the physical risk factors of beauty industry workers and further improve the quality of life of beauty industry workers.

• Journal of the Society of Disaster Information
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• v.18 no.2
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• pp.395-404
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• 2022

Purpose: Small-scale construction sites have insufficient systematic safety management activities, and due to the characteristics of the construction site, the production structure is complex due to external environmental factors, and the risk of construction equipment is very high. We would like to propose a checklist method among practical risk assessment techniques that can derive risk factors for disaster prevention at small construction sites and reduce disasters. Method: Risk factors were derived by analyzing literature research and disaster cases, and detailed work for a checklist of risk assessment suitable for small-scale construction sites was classified based on risk factor items. Result: Hazard factors were divided into 6 major categories, and 29 detailed types of work were classified based on actual work types, and 80 detailed works were classified accordingly. Conclusion: By arranging risk factors suitable for small-scale construction sites according to the classification system, the lack of expertise in the construction site can be supplemented, and risk factors can be derived more easily and disaster reduction can be expected through establishment of safety measures.

• 산업보건소식
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• no.43
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• pp.24-27
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• 1987

여성근로자들이 작업장에서 당면하게 되는 건강문제들은 주로 화학적환경, 물리적환경, 육체적인 근력을 필요로 하는 작업 등으로 구분되어 다루어지고 있다. 이들 중에서도 특히 연(lead) 과 유기용제 그리고 고열등은 이들에 대한 남성과 여성의 감수성이 다르다는 일반적인 견해들로 인하여 대표적으로 다루어지는 작업장 유해인자 들이다. 동시에 해부학적인 체격의 차이로 인하여 발생되는 근력 및 심폐기능과 관련된 지수들의 차이 역시 특히 물건을 다루는 작업(manual ha­ndling job)들에서는 문제시될 수 있으며 월경 및 임신도 작업수행능력에 영향을 줄 수 있으리라는 것이 일반적인 생각이다. 이들 요인들이 실제로 어느정도 남녀에 대하여 다른 영향을 즐길 수 있는지를 개략적으로 살펴 보면 다음과 같다.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1993.10a
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• pp.165-173
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• 1993

생산일정계획 수립 시스템을 통하여 수립된 생산계획을 현장에서 실천하고자 할 때, 일반적으로 계획수립 후 얼마 지나지 않아 계획수립시 고려할 수 없었던 기계고장 또는 자재조달 지연, 작업 지체, 주문 취소 등과 같은 요인으로 생산일정을 계획대로 실천할 수 없는 경우가 발생한다. 이런 상황에서는 기존의 생산계획을 계속 실행할 수 없으므로 손쉽게 대처할 수 있는 방안이 필요하다. 본 연구에서는 일정계획편집기를 이러한 문제점을 해결할 수 있는 대안으로 제시한다. 일정계획편집기를 GUI, 객체지향적 설계를 통해 구현하므로서 이상상황과 일정변동에 효과적으로 대처할 수 있다. GUI환경을 통해, 수립된 생산일정과 이상상황, 작업진척, 수행도 등을 화면에 Gantt 도표로 표시해 주어 현장 파악을 용이하게 하고 작업추가, 삭제, 작업시간 변경, 대체공정으로의 이동 등의 편집을 mouse와 icon을 이용, 편리하게 수행할 수 있다. 편집작업시 자동으로 생산일정의 타당성을 만족시켜 줄 수 있는 지능화를 위한 기초 단계로서 객체지향설계를 이용한 규칙기반 일정계획 편집기를 설계한다.

• Journal of the Korean Society of Marine Environment & Safety
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• v.15 no.3
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• pp.217-222
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• 2009

Safe navigation is closely related to the fatigue of marine officers. Also, the fatigue of duty officer can cause serious marine accidents. In this study, the documentary survey about the marine officers' working environments, fatigue factors and symptoms was conducted. And the questionnaire survey which is related to the fatigue analysis factors such as sleepiness, mental physical workload and alcohol for apprentice officers was carried out, and the results of questionnaire survey were analyzed. Lastly, on the basis of this study, the fatigue analysis model was suggested in order to assess the marine officers' performance in the future.

• Proceedings of the Korea Information Processing Society Conference
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• 2019.10a
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• pp.538-539
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• 2019

타워크레인은 조선, 건설 등 산업 현장에서 중량물 운반 운전을 위한 도구로 사람이 수동 작업으로 대부분 수행된다. 이러한 타워크레인 운전 훈련 과정은 훈련 실습자에게 장시간 교육하기에 비효율적 뿐 아니라 위험한 작업이므로 최근에는 가상 훈련 시뮬레이션을 통해 이루어 지고 있다. 이러한 가상 타워크레인 시뮬레이션을 구현하기 위해서는 기후환경, 중량물, 줄걸이와 같은 외부적 요인도 중요하지만 타워크레인의 운반 중량물과 직접적으로 연결이되는 로프를 정밀하게 표현하는 것이 중요하다. 하지만, 현재 개발된 대다수의 로프는 단면이 원통형을 띄고 있어 물리적인 요인이 작용하였을 때, 회전축이나 물리적인 형태를 가늠하기가 어렵다. 그러므로, 가상의 타워크레인 시뮬레이션 로프를 실제 타워크레인 슬링벨트와 유사한 면의 형태를 가지고 구축하여 실 환경과 유사한 환경에서 숙련된 타워크레인 시뮬레이션을 훈련하기 위한 로프 시뮬레이션이 필요하다. 따라서, 본 논문에서는 로프 시뮬레이션이 실제와 동일한 형태의 슬링벨트를 제공할 뿐만 아니라 로프의 면 형태 구현하고, 물리시뮬레이션을 통해 로프의 사실적인 움직임을 나타낼 수 있는 가상현실(VR) 기반 훈련 로프 시뮬레이션을 제시한다.

• The Journal of Korean society of community based occupational therapy
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• v.8 no.1
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• pp.11-21
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• 2018

Objective : Migration can be a stressful process to people because they have to adjust a lot of things including habits, routine and cultural behavior. Also, Migrant can negatively impact on participation in daily meaningful occupations. Thus, the purpose of this research is to investigate whether participation in meaningful occupations after immigration and environmental factors impact the QOL in migrant women. Method : Migrant females who live in Australia were invited to participate in the study (n= 9). In this study, participation, environmental factors and QOL were measured using the questionnaire, which was developed by researchers. Purposive sampling was used to select the participants who were then asked to fill out a survey. Both quantitative data and qualitative data were collected. The SPSS program was used to process the quantitative data that was transcribed and coded. Result : Spearman's rank correlation coefficient shows that the total scale of QOL and the total scale of occupational engagement were significantly correlated at the 0.05 level. Conclusion : There was a significant relationship between quality of life and occupational engagements. Migrant women tend to have a lack of participation in meaning occupations thus, it seems to impact on their quality of life.