• Journal of the Society of Naval Architects of Korea
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• v.47 no.4
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• pp.589-597
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• 2010

The indoor noise of the naval vessel is very important considering hearing protection, improvement of working environment and easily communication between crews. When the environment of the naval vessel suffering from the noise is considered, it is very important to be quiet in the living area where the crews have a rest sufficiently. In addition, the noise of the working area should be reduced in order to increase working efficiency. Therefore, in this research, the satisfactions about the indoor noise are survey for crews working in a naval vessel. Through this survey, the relationship between the indoor noise and crew's satisfaction about it can be found. As a result, the limit of sound pressure level which almost all crew can be satisfied with the indoor noise about their living and working area is suggested base on the survey in this research.

• Proceedings of the KSME Conference
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• 2003.11a
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• pp.1303-1309
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• 2003

This paper presents the static and dynamic measurements for the strength and motion characteristics as well as the improved procedures to assess strength of wheel loaders. Two scenarios for static measurement were decided by which cylinder was actuating. The dynamic measurement was performed for two types of motion, that is, simple reciprocation of the working devices and actual working motion including traveling, digging and dumping. The measured items were stresses, cylinder pressures and strokes. Stress induced by bucket working showed higher level than that by boom working. The measured cylinder speeds were relatively superior to the design speeds. Working stress histories were thought to be closer to static rather than dynamic. A fully assembled FE model was prepared for structural analysis. In this paper, a more simple method was suggested to avoid nonlinearity caused by heave of rear frame under digging forces. Also how brake affected on structural behavior and digging force was examined closely in relation with tire pressure. It was confirmed that the overall stress level of wheel loader during turning traveling with loaded bucket was far lower than the yield stress of material.

• Toxicological Research
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• v.28 no.3
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• pp.187-193
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• 2012

In order to evaluate the physical and psychological health effects of air pollutants from new building materials, 100 employees who worked in new buildings were given a general health questionnaire, and the prevalence of their subjective complaints was measured. The collected data were classified according to age, gender, smoking status, profession, working time, sleep time, life style, and length of employment. The results obtained were summarized as follows: The THI lie scale scores were significantly higher among the older respondents. Compared to males, females showed a significantly higher level in the depression itemas well asa tendency toward high ratios of physical and psychological complaints. The smoking group showed higher scores regarding health complaints related to most physical and psychological items. Smokers showed significantly increased respiratory organ complaints compared to nonsmokers. Those with a profession showed significantly higher level of nervousness. The group of those working 7 to 10 hours group showed higher rates of complaints in the multiple subjective symptoms and mouth/anus items than the group working less than 2 hours. Those living an irregular life showed a tendency toward higher rates of complaints for most physical and psychological subjective factors. Those who were satisfied with their environments showed significantly lower scores in the mouth/anus, impulsiveness, mental irritability, depression, and nervousness items. In summary, this study shows that the health complaint scores regarding physical and psychological symptoms tended to be higher among the unsatisfied group, the irregular life group, the group who worked long hours, the elderly, smokers, and females. These results can be used to improve the psychosomatic health status and working environments of employees working in new buildings.

• Journal of Family Resource Management and Policy Review
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• v.13 no.1
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• pp.61-81
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• 2009

The purpose of this study was to investigate the policy demands of the family sector for work-family balance, with a focus on the child care and household labor provisions. For empirical analysis, data were collected from 197 dual-income families with at least one young child under age 10 in the metropolitan area via self-administered questionnaires. The major findings of this study were as follows. First, child care provisions for working mothers and fathers were insufficient and unfair, and the ratio of child care provisions offered by familial child care network was high. The characteristics of child care provisions for working parents were associated with family structure, working conditions, and demographic variables. Second, household labor provisions for working mothers and fathers were also insufficient and unfair, and the ratio of socialization was high. Third, the level of family satisfaction varied by the level of child care and household labor provisions, respectively, controlling family structure, working conditions, and demographic variables. The empirical results of the study provided policy implications for work-family balance.

• Environmental Analysis Health and Toxicology
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• v.31
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• pp.11.1-11.6
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• 2016

Objectives A hazard assessment of di(2-ethylhexyl) phthalate (DEHP), a commonly used workplace chemical, was conducted in order to protect the occupational health of workers. A literature review, consisting of both domestic and international references, examined the chemical management system, working environment, level of exposure, and possible associated risks. This information may be utilized in the future to determine appropriate exposure levels in working environments. Methods Hazard assessment was performed using chemical hazard information obtained from international agencies, such as Organization for Economic Cooperation and Development-generated Screening Information Data Set and International Program on Chemical Safety. Information was obtained from surveys conducted by the Minister of Employment and Labor ("Survey on the work environment") and by the Ministry of Environment ("Survey on the circulation amount of chemicals"). Risk was determined according to exposure in workplaces and chemical hazard. Results In 229 workplaces over the country, 831 tons of DEHP have been used as plasticizers, insecticides, and ink solvent. Calculated 50% lethal dose values ranged from 14.2 to 50 g/kg, as determined via acute toxicity testing in rodents. Chronic carcinogenicity tests revealed cases of lung and liver degeneration, shrinkage of the testes, and liver cancer. The no-observed-adverse-effect level and the lowest-observed-adverse-effect level were determined to be 28.9 g/kg and 146.6 g/kg, respectively. The working environment assessment revealed the maximum exposure level to be $0.990mg/m^3$, as compared to the threshold exposure level of $5mg/m^3$. The relative risk of chronic toxicity and reproductive toxicity were 0.264 and 0.330, respectively, while the risk of carcinogenicity was 1.3, which is higher than the accepted safety value of one. Conclusions DEHP was identified as a carcinogen, and may be dangerous even at concentrations lower than the occupational exposure limit. Therefore, we suggest management of working environments, with exposure levels below $5mg/m^3$ and all workers utilizing local exhaust ventilation and respiratory protection when handling DEHP.

• Journal of Korean society of Dental Hygiene
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• v.17 no.3
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• pp.515-526
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• 2017

Objectives: This study was carried out for the purpose of examining the levels of vocational awareness and the professional ethics recognition in the clinical dental hygienists. Methods: A survey was conducted targeting 500 members who participated in the supplementary education program for dental hygienists in the first half of 2017. Total 328 subjects' materials were analyzed. Results: A reason for working in terms of the occupational identity was very high with 81.4% in 'aiming to earn money'. A goal of working was the highest with 41.5% in 'financial independence'. The professional ethics approach level was indicated to be the highest with 3.33 points in the domain of human relation. It was shown to be in order of the job satisfaction level with 3.21 points, followed by the lifelong working with 3.17 points, the vocational ethics observance with 2.95 points, the workplace satisfaction level with 2.82 points, and the job anxiety level with 2.65 points. The domain in the job anxiety level according to general characteristics was indicated to be significantly high in the higher age and work career in case of the married and in case of Seoul as a workplace. The domain in the professional ethics observance was shown to be significantly high in the higher work career in case of the married and in case of Gyeonggi Province as a workplace. The domain in the lifelong working was indicated to be significantly high in case of the married. Conclusions: For the establishment of the right professional ethics as a dental hygienist and for the securement of its practice starting from the education for the dental hygiene department, the development of educational program will be needed aiming at the approach to the professional ethics and the reinforcement in the vocational ethics recognition.

• Korean Journal of Occupational Health Nursing
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• v.8 no.2
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• pp.212-220
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• 1999

This study was designed to determine anxiety factors and levels of anxiety of foreign industrial workers. One hundred and seventy five workers were researched who were working in Guro Working Complex, Ansan City and Sungnam City Working Complex asking 60 questionnaires from Feb. 25, 1996 to April 12, 1996. The results were as follows ; 1. The 30.3% of foreign workers were from Nepal. 17.7% from Bangladesh 10.9% from Srilanka, 14.9% from Philippines, 1.1% from Ghana. 80% of foreign workers were male, 77.7% were single and most of then were in the age from 25 to 34. 37.1% of foreign workers had not lived in Korea less than 12 months, 58.8% graduated from college, 33.7% from highschool, and more than half lived in a dormitory. 2. On the anxiety level related to subject workers' general characteristics, the workers level from Nepal recorded the highest point 2.70 statistically showing a significant difference(P=0.0003). On the physical anxiety level, the workers from Nepal recorded a significantly low point comparing with Jamaica, Burma, Vietnam and Nigeria(P=0.01). 3. Emotional anxiety level marked the highest on the workers living as a tenant comparing with the workers in dormitory. 4. On anxiety factors, the emotional anxiety recoded the highest, the social anxiety and the somatic anxiety. 5. On the relation between the anxiety factor, the somatic anxiety factor had a relation with emotional, environmental, and occupational factors and on the other relation between the anxiety factor and emotional factor had a relation with environmental, social, cultural factors. Moreover, the environmental factor had a relation with the cultural factor, social factor had a relation with the cultural factor, and cultural factor was related to the occupational factor.

• Korean Security Journal
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• no.27
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• pp.31-49
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• 2011

The subjects consisted of 60 healthy men who absence of cardiopulmonary diseases, orthopedic diseases, and metabolic diseases. The difference of physical fitness, body composition, cardiovascular risk factors, and psychological characteristics for security guards' working type were examined using one-way ANOVA through SPSS 12.0 version and was treated for the post hoc test when the difference appeared significantly. According to the result, first, there were higher level for the physical fitness according to the security guards' position and it increases body composition and cardiovascular risk factors from higher position. Second, physical fitness level is higher, body composition and cardiovascular risk factors is lower in the security guards for the field service than the security guards on inside duty according to the security guards' working type. Third, it decreases body composition and cardiovascular risk level when the physical fitness level is getting increase for the security guards. In conclusion, it needs to have a physical activity with aerobic system for the security guards of leading members and inside service to decrease the overweight or obesity and cardiovascular risk level.

• The Korean Journal of Health Service Management
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• v.9 no.3
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• pp.107-114
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• 2015

Objectives : The purpose of this study was to understand how work environment and conflict level of dental hygienists affect turnover for the efficive manpower management of dental hygienists. Methods : Dental hygienists in dental (hospital)clinics near Daegu were randomly selected as the subjects of this study, and the followings analysis results are from 249 questionnaires: which were collected from March 2 to March 31 2011. Results : Among the 249 dental hygienists surveyed, 33.7% experienced turnover and 59.0% had turnover intention. From the analysis of the demographic, working environment and levels of conflict, dental hygienists had significantly higher turnover experiences based on following factors: older age, employment at a dental clinic rather than a dental hospital, longer working hours, longer total career as a dental hygienist, and longer of length of time at their current job. Furthermore, dental hygienists had significantly higher turnover intentions based on the following factors: younger age, more ignorant and higher level of discomfort due to conflict levels. Conclusions : Therefore, the working environment of dental hygienists has to be improved to inspire motivation, and conflict management has to be taughht within an organization to allow free communication and active participation in decision-making.

• Research in Community and Public Health Nursing
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• v.4 no.1
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• pp.45-57
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• 1993

The study was conducted with 27 health mangers working in manufacturing industries. The purpose of this study was to analyze the health manager's employment status, health examination, and it's follow. up health management level(about the industrial type). The results are as follows: 1. Characteristics of Manufacturing Industries: The ratio of nurse to employees is 1 : 552.6 and the percentage of physician employed was 51.9% All of the physicians were part time except one. 2. Health Examination and Follow Up ; 1) Periodic screening examinations were provided to 92.39% of the employees. Of these 11.56% required a detailed examination. Follow up on routine cases were done for 51.69%. Follow up on intensive cases were done 13.97%. 2) 62% of all employees working in hazardous conditions(noise, artificial light 74.1%) are required to receive a special health examination bi annually. Of these 96.66% were examined. 11.24% of these employees required a detailed follow up examination. 3. Relevancy between health management level, industrial type, and health manager's status 1) Health clinic operated separately except one case. Nursing activity level :. health diagnosis(0.27) Occupational condition (0.97) Health education(0.81) Health assessment(0.74) Health education level is higher at the industries working in environmental technician(P=0.017). The other's significance is not shown by any type of the staff.