• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.8 no.3
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• pp.131-150
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• 1979

Recently only a few correlations between various factors due to the different grades of surface roughness for the nucleate pool boiling have been proposed. The main purpose of this work is to test the validity of these types of correlations between related factors to nucleate pool boiling phenomena. The boiling experiments using distilled water were carried out at the heat flux ranging from $7.4\times10^4\;to\;2.4\times10^5kcal/m^2h$ on the sintered porous metal surface with the cavity diameter of 10, n, 40, 70, $100{\mu}$, respectively, at the atmospheric pressure, To determine the bubble sizes, number of nucleation sites, delay and growth time, frequency of bubble emission and rising velocities of bubbles, the high speed motion picture technique was employed. In the correlation $f{\propto}D_b^n$, where f denotes frequency of bubble emission and $D_b$ departure diameter, n, the power factor of $D_b$, have been found to be from -2 to -10/3. The correlation C in the correlation between heat flux q and density of nucleation sites $\frac{N}{A}$, $q=C(\frac{N}{A})^n$, was appeared to be more crucial than the power factor n. The correlation of the heat flux q to the temperature difference ${\Delta}T$ and the density of nucleation sites$\frac{N}{A}$, was proposed to be $$q-460{\Delta}T^{\frac{5}{4}}=K{\Delta}T{\frac{5}{3}}(\frac{N}{A})^{\frac{2}{3}}$$. The values of heat transfer coefficient obtained in this experiments for the porous sintered metal surface appeared to be very high in comparison with the formerly obtained results for the other surfaces.

• The Journal of the Korea Contents Association
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• v.14 no.4
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• pp.135-147
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• 2014

The wages of migrant workers about the rational discrimination and equal treatment have been treated partially. Foreign workers are also discussed in terms of the productivity and rational discrimination, but it is very limited. The Business community has been persisting that the minimum wage system for foreign workers should be excluded. Unlike local workers, migrant workers are relatively in that position with limited work place, a limited period of time to provide labor for the purpose of wage, in that points, the gap of the reality and the laws surrounding wages can be identified. This is expressed the conflicts and distress between employers and workers. Meanwhile, wages and equal treatment on the part of the study have been discussed, but it is hard to be organized clearly. Be related to this study, it will have a limitation. In this paper, since the employment permit system was enforced, the status of wages and distress and the factor of conflicts between the employer and the foreign worker examine and suggest the improvement plan for the law regarding wage.

• Journal of Applied Reliability
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• v.12 no.1
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• pp.13-24
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• 2012

This paper applied the Blue Print and FMEA (Failure Mode and Effect Analysis) to education service in order to raise the education service satisfaction. First, the Blue Print is deployed to come up with strategies to overcome the fail possibility point and waiting point. Next, in order to analyze the fail factors and alternative strategies, the Blue Print of education service is applied to FMEA. The results are as follows; first, the ommission from information document by web-mail or e-mail, Second, thing that selected in spite of company uneducated, thing that omitted despite the company is target, and the unsatisfaction of attendee about training contents. Third, the delay of counsel at the telephone reply, erroneous list of course name and attendee at HRD (Human Resource Development), omission of check whether attends or not. Except for unsatisfaction of attendee, all appears at the process that service delivered. And the unsatisfaction of attendee is about education contents. Both is the factor which have influence on the education service quality. The strategies to remove the failure mode are training and manual development on service and work, a thorough management and check of information system like as ERP (Enterprise Resoure Planning), HRD, education institution list DB (Data Base), on-line application system, a development of education program to offer best education that reflect the user needs and continuously changing environment.

• Asian Journal for Public Opinion Research
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• v.10 no.3
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• pp.200-229
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• 2022

The purpose of this study is to analyze the effects of youth job policy measures, set forth in Korea's 2016-2020 Third Basic Plan for Low Fertility and Aging Society (December 2015), on marriage and fertility among young people. Based on the results, we provide theoretical explanations for the findings and suggest policy alternatives to overcome the low fertility phenomenon in Korea. Previous studies have shown that employment is an important factor for marriage among youth, and a job policy could increase marriage and fertility rates. To test this assumption, we performed an exact matching between Statistics Korea's Employee-Enterprise Linkage DB and the Newlyweds DB from 2011 to 2019, in order to identify all young people aged 15-34. Then, linear spline regression analysis was used to examine the impact of the youth job policy on marriage and fertility. Comparing the period before the implementation of the employment policy (2011-2015) and after (2016-2019), the fertility rate increased as the number of young people looking for work increased. In addition, it was found that these impacts were greater after the implementation of the measures (2016-2019) than before (2011-2015). It is interesting to note that job growth among young people did not lead to an increase in marriage. However, the number of births significantly increased when young people who occupy jobs got married, which seems to be related to the delay in marriage among young people who are employed. Survey results about the intentions to marry and views on fertility are utilized for the explanation of the study results.

• Korean Journal of Social Welfare
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• v.65 no.4
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• pp.61-88
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• 2013

The aim of this study was to explore the work experiences of hospital-based child protection team staffs who had intervened the child abuse cases resulting in death. In order to gather the relevant data, all 62 child protection teams registered nationwide were contacted and 5 teams which had actually experienced at least one child abuse deaths were found. The staffs (hospital social workers and doctors) who belonged to these teams were intensively interviewed, and the interviewed materials were thoroughly analyzed by qualitative research methodology. The result showed that treatment delay was the most important obstacle to prevent unnecessary deaths of the victims. Some abused victims were sent to the hospital only after their physical condition had so gravely deteriorated. In other cases, custodians' bland denial or refusal to treatment made impossible the timely intervention to save the child lives. Nevertheless, child protection team staffs' reasonable suspicion and active intervention could sometimes uncover the hidden truth that child abuse was the actual cause of death. These incidents were regarded as a team's meaningful accomplishments by team members. Meanwhile, lack of awareness and excessive burden about the role and responsibility of mandated reporter precluded medical staffs' active involvement. Also, substantiating the abuse suspicion by securing positive evidences was found to be a facilitatory factor for the rapid public intervention. On the basis of these results, several practice and policy implications were discussed to improve the early detection process, securing evidence and uncovering the actual cause of death in child abuse deaths.