• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.5
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• pp.3276-3283
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• 2015

The purpose of this study was to ascertain whether some socio-economic characteristics affect the service users' perception on the change of social condition in healthcare services. The research target for this study was fixed on the sample members in national sample design and the data of this study was used 37,648 effective samples collecting using Probability Proportional to Size. The results of this study using the causal relationships model are as follows: The variables including type of female, age, years of schooling show positive signs on the service users' perception on the social condition change of healthcare. And the variables including household income, temporary worker, casual worker, urban residents show negative signs on the service users' perception on the social condition change of healthcare. In conclusion, the socio-economic characteristics affect the service users' perception on the social condition change of healthcare. And the service user's perception on the social condition change of healthcare was affected positively on the beneficiary side.

• Journal of muscle and joint health
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• v.25 no.1
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• pp.50-59
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• 2018

Purpose: The purpose of this study was to investigate the relationships among health behavior, wellness condition, and stage of change in health behavior by risk of cardiocerebrovascular diseases (CVD) in male office workers. Methods: A total of 205 male office workers participated in the 2017 National Health Examination at a manufacturing/ R&D business in Seongnam and completed self-reported questionnaires. Results: There were significant differences in health behavior scores by risk of CVD (F=4.78, p=.009) and statistically significant differences in no smoking (F=5.86, p=.003), exercise (F=5.49, p=.005), and health checkup (F=4.39, p=.014). There were statistically significant differences in health behavior (t=-4.14, p<.001) and wellness condition (t=-2.61, p=.010) by the stage of change in health behavior. Health behavior had a weak positive correlation with wellness condition (r=.36, p<.001). Logistic regression analysis showed that, when adjusted for age and employment period, the probability of becoming attention or risk group was 11% lower for quitting smoking (OR 0.89, 95% CI 0.81~0.97, p=.006) and 18% lower for regular exercise (OR 0.82, 95% CI 0.70~0.95, p=.009). Conclusion: The direction of health management at the workplace should be changed to promote the wellness of all workers, not the management of the disease, and a health promotion program should be continued to emphasize health behaviors such as smoking cessation and regular exercise.

• Journal of IKEEE
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• v.7 no.1 s.12
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• pp.97-106
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• 2003

In ARQ based error control, imperfect error detection leaves error remains on a packet. Aiming for a reduction of error remains in multicopy transmission ARQ system, we propose a rule of requesting a retransmission and deciding a correct copy, (identified as $(m, \;{\sigma})$rule). While the probability of error remains is reduced by the employment of the $(m, \;{\sigma})$ rule at multicopy transmission ARQ, delay and throughput performance may be degraded in comparison with those of conventional single copy transmission ARQ. Thus, we develop an analytical method to evaluate the performance trade-off in multicopy transmission ARQ following the $(m, \;{\sigma})$ rule. From the numerical results obtained by the analytical method, we investigate the effect of channel characteristics on the performance of error remains, packet loss, throughput, and packet delay, and confirm that the adaptability of the $(m, \;{\sigma})$ rule to conform to various QoS requirements with ease.

• Architectural research
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• v.15 no.3
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• pp.151-158
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• 2013

Offshore oil and gas process plants are exposed to hazardous accidents such as explosion and fire, so that the structural components should resist such accidental loads. Given the possibilities of thousands of different scenarios for the occurrence of an accidental hazard, the best way to predict a reasonable size of a specific accidental load would be the employment of a probabilistic approach. Having the fact that a specific procedure for probabilistic accidental hazard analysis has not yet been established especially for explosion and fire hazards, it is widely accepted that engineers usually take simple and conservative figures in assuming uncertainties inherent in the procedure, resulting either in underestimation or more likely in overestimation in the topside structural design for offshore plants. The variation in the results of a probabilistic approach is determined by the assumptions accepted in the procedures of explosion probability computation, explosion analysis, and structural analysis. A design overpressure load for a sample offshore plant is determined according to the proposed probabilistic approach in this study. CFD analysis results using a Flame Acceleration Simulator, FLACS_v9.1, are utilized to create an overpressure hazard curve. Moreover, the negative impulse and frequency contents of a blast wave are considerably influencing structural responses, but those are completely ignored in a widely used triangular form of blast wave. An idealistic blast wave profile deploying both negative and positive pulses is proposed in this study. A topside process module and piperack with blast wall are 3D FE modeled for structural analysis using LS-DYNA. Three different types of blast wave profiles are applied, two of typical triangular forms having different impulse and the proposed load profile. In conclusion, it is found that a typical triangular blast load leads to overestimation in structural design.

• Korean Journal of Occupational Health Nursing
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• v.30 no.4
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• pp.206-215
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• 2021

Purpose: This study aimed to investigate the factors affecting cardiovascular disease in middle-aged male workers. Methods: The participants were 137 male office workers over 40 years old and under 60 years old working in small- and medium-sized workplaces from three southern provinces of Korea. Data were collected through self-reported questionnaires and health screening reports from the 2014 National Health Examination. The influencing factors included general characteristics of participants, anger expression style, and occupational stress. Data were analyzed using t-test, ANOVA, and regression analysis with SPSS 22.0. Results: The mean score of risk of cardiovascular disease was 6.73±4.69 and there were significant differences in exercise (t=2.13, p=.035) working time (t=-2.15, p=.034). Logistic regression analysis showed that, when adjusted for exercise and working time, the probability of becoming under a cardiovascular disease risk was 21% higher for those who anger-in (OR=1.21, 95% CI=1.02~1.44, p=.027) and 12% higher for those perceived occupational stress (OR=1.12, 95% CI=1.01~1.24, p=.030). Conclusion: The results suggest developing the strategies for middle-aged male workers to encourage exercise and to decrease occupational stress, as well as an appropriate anger expression style to improve holistic aspect of health considering their demographic characteristics.

• Journal of Korean Society of Disaster and Security
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• v.14 no.3
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• pp.39-49
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• 2021

According to the recent "Status of Industrial Accidents at the End of December 2020" released by the Ministry of Employment and Labor, each industry is subject to industrial accidents. The number of accident deaths by construction industry, accident deaths by accident type fell, and accident deaths by workplace size were 5 to 49, indicating that most accident deaths occurred due to falling accidents at small construction sites. Therefore, urban living houses are small construction sites, and the probability of falling accidents is very high. Fall simulation training for disaster occurrence is conducted mainly by large construction ordering organizations in the public sector, and it is the first case in Korea that a housing construction company has conducted at a small construction site. This study analyzed and presented the definition, construction characteristics, and safety management status of urban living houses, and developed and spread an emergency relief procedure manual in the event of a fall accident to minimize deaths.

• Journal of the Korea Society of Computer and Information
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• v.20 no.3
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• pp.47-56
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• 2015

Automated detection of interesting web pages could be used in many different application domains. Determining a user's interesting web pages can be performed implicitly by observing the user's behavior. The task of distinguishing interesting web pages belongs to a classification problem, and we choose white box learning methods (fixed effect logit regression and support vector machine) to test empirically. The result indicated that (1) fixed effect logit regression, fixed effect SVMs with both polynomial and radial basis kernels showed higher performance than the linear kernel model, (2) a personalization is a critical issue for improving the performance of a model, (3) when asking a user explicit grading of web pages, the scale could be as simple as yes/no answer, (4) every second the duration in a web page increases, the ratio of the probability to be interesting increased 1.004 times, but the number of scrollbar clicks (p=0.56) and the number of mouse clicks (p=0.36) did not have statistically significant relations with the interest.

• Journal of Society of Preventive Korean Medicine
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• v.4 no.1
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• pp.32-50
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• 2000

On the process of research in the plan on oriental medical participation in the industrial health sponsored by BK21 project, we carried out the oriental medical health examination program for workers during former half-year We reached the conclusion as follows, 1. The oriental medical health examination program is contents and formalities that should be determined by present industrial health system, based on the oriental medical system and scholastic character, and included probability of the western and oriental medical cooperation. 2. The oriental medical health examination program can promote capability of individual health management and productive power of workers, and it is capable to manage on the self-conscious symptoms and macroschophically approach to their environment 3. The oriental medical health examination program that we have developed, is flow as questionare, understanding of working environment, information of result and later management. It is composed of three fields as follow , first, use of pulse diagnostic apparatus, understanding of the health promotion life style, and diagnosis of the oriental medical doctor, second, analysis of constitution, third, photographing for understanding of the musculoskeletal disorders, questionare for musculoskeletal self-conscious symptoms, and diagnosis of oriental medical doctor. 4. The oriental medical health examination program that we have developed, progressive from the view point of health, makes the oriental medical doctor's roll more important. It is the first trial at the western and oriental medical cooperation and characterized by excellence about musouloskeletal disorders. But it need to be improved in aspects of time and specialist on the health examination, diagnostic apparatus, control of examinant and later management. So we think that it needs research on the employment of health examination specialist, establishment of later management system, development of significantly diagnosable standard and assessable form on the health examination, and contents of health examination on the western and oriental medical cooperation.

• Journal of Korean Society of Occupational and Environmental Hygiene
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• v.11 no.2
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• pp.161-168
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• 2001

The types of exposure data needed in an industry-based study depend on the diseases of interest and the study design to be used. The best situation occurs when we have quantified personal exposure estimates for the agents of interest, the least informative case occurs when we have only knowledge of the fact of employment in a plant, industry, or trade where exposure probability is high. Exposure information for most industry-based studies falls somewhere between these tow extremes. Job exposure matrices(JEM) are designed to link information on occupation with information on exposure to specific workplace hazards. Some forms of systematic error of bias may be less likely to occur in studies that utilize job-exposure matrices to indirectly infer exposures from job titles than in studies that assess exposures by asking subjects about their past exposure. JEM can be used effectively in industry-based studies for historic cohort studies, case-control study to assist with the retrospective assessment of occupational exposures among workers whose individual exposure histories are unavailable. JEM generally consist of a computerized database that links information about job categories and likely exposures. These two major axes may be stratified by calendar time. This article reviews the design of JEM in support of industry-based studies. Specific matrices may find broader applicability along with the increasing availability of detailed hygienic data.

• Journal of Labour Economics
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• v.26 no.2
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• pp.97-127
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• 2003

The purpose of this paper is to analyze the expected earnings differentials by major of university graduates. Usually the achievement in labor market has been measured by the earnings of those being with job. But such simple comparisons of earnings might fail to bring out correct evaluation once if the probabilities of getting a job are quite different across the major of university graduates. So it is necessary to compare the expected lifetime eatings which can be computed using the earnings of those with job and the probabilities of taking a job. In this paper, we showed that the expected earings of university graduates are quite different by major and not only the difference of earnings but also the difference of job-taking probabilities are considerably contributing such differentials. Especially the expected earnings of medicine and education are considerably higher than those of other majors. These results are maintained almost identically with the change of estimation methods. But despite of these findings. it should be admitted that it was not possible to exactly measure the magnitude of differentials by major.