• Journal of Family Resource Management and Policy Review
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• v.27 no.4
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• pp.1-17
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• 2023

This study examines the entrepreneurial experiences of unmarried mothers living in a community who have succeeded in starting a business. Attention was given to the maternal and labor rights of five single mothers in a community who gave birth, raised children, and engaged in vocational activities. Data were collected through one-on-one in-depth discussions with the participants and analyzed using Colaizzi's descriptive-phenomenological method. The data analysis revealed 53 themes and 10 clusters of themes. Based on these results, items such as overcoming pregnancy conflict, reasons for starting a business, and successful entrepreneurial experience were identified and described. The key themes of this study include "Pressure to live", "Hold oneself responsible for an unblessed life", "Stigma and deprivation of opportunity", "Maintaining basic life amid anxiety", "Starting from ground zero", "Work and parenting tug-of-war", "Let's rely on my ability rather than external support", "Securing credit capital", "Philosophy for shared growth" and "Infinite possibilities at the edge of a cliff". In the attempt to start a business using positive psychological capital for the well-being of themselves and their children's, the mothers uncovered social capital, which led to mutual growth. Based on the research results, the ethics and resilience of shared growth were discussed.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.1
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• pp.69-74
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• 2018

With the increasing development of industrial society and the availability of high quality electrical energy, the simplification of operation and maintenance procedures is required, in order to ensure the reliability and safety of electrical systems. In this paper, the dielectric breakdown characteristics of $N_2-O_2$ mixed gas solid insulation, which is used as an alternative to SF6 in various electric power facilities, are verified. When the gas mixture has a composition ratio similar to that of the atmosphere, the dielectric breakdown characteristics are relatively stabilized. It was confirmed that the breakdown voltage of the gas in the electrode near an equal electric field increased with increasing pressure according to Paschen's rule. The breakdown voltage of the surface increased linearly with increasing pressure, and the difference was caused by the mixing ratio of $O_2$ gas. This change in the surface insulation breakdown voltage was caused by the influence of the electrically negative $O_2$ gas and the intermolecular collision distance. In this study, the influence of the intermolecular impact distance was larger (than that in the absence of the electrically negative $O_2$ gas). The breakdown voltage relation applicable to Teflon according to the surface insulation characteristics was calculated. The characteristics of the surface insulation properties of Teflon, which is used as a solid insulation material, were derived as a function of pressure. It is thought that these results can be used as the basic data for the insulation design of electric power facilities.

• Journal of International Area Studies (JIAS)
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• v.22 no.2
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• pp.305-330
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• 2018

The purpose of this article is to examine whether Myanmar's experience in which dealing with the most exemplary change among rogue states or pariah state in the 21st century is feasible for North Korea's case. Recently, North Korea's willingness to dialogue, reform and open is similar to the precedent in which the Myanmar military junta dismantled its ruling system and turned over transition period through general elections in 2010 and 2015 each. The so-called 'Myanmar Model' refers to a country branded as a rogue state which has been under the international sanctions and pressure, and opening its political system and the market by choosing transformation. However, rapid changes in speed across the entire society after opening up are impossible because the political elite is only the leading role and implementation in the transition. In case of Myanmar, military culture has penetrated into society due to such a long-lasting military dictatorship, and even democratic bloc has become accustomed to authoritarian decision-making process. Furthermore, the "reserved area" of the old regime still exists in a deformed political structure that can not retrieve the interests of the military. Therefore there could not be achieved political development in term of qualification. North Korea also appears unlikely to achieve political and economic assessment in a short period of time, as civil society has not appeared due to its long dictatorship and very low economic development levels. Like Myanmar, North Korea is also likely to control the pace and direction of upcoming reforms and open, as the dictator or most powerful person chose to reform and open up. Therefore, if North Korea moves toward the 'Myanmar Model', there will be high expectations of new changes in the short term, but it could be delayed or stalled in the mid and long term.

• Korean Chemical Engineering Research
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• v.55 no.5
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• pp.629-637
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• 2017

Severe dust explosions occurred frequently in food processing industries and explosion damage increase by flame propagation in pipes or plants. However there are few fire explosion data available due to various powder characteristics. We investigated the characteristics of ignition and explosion on sugar, cornstarch and flour dust with high frequency accidents and high social demand. The measurements showed the median diameter of 27.56, 14.76, $138.5{\mu}m$ and ignition temperature has been investigated using by thermo-gravimetric analysis (TGA) and differential scanning calorimeter (DSC). The maximum explosion pressure ($P_m$) and dust explosion index ($K_{st}$) of sugar, cornstarch and flour are 7.6, 7.6, 6.1 bar and 153, 133, 61 [$m{\cdot}bar/s$], respectively. The flame propagation time in duct was calculated in order to evaluate the damage increase due to flame propagation during dust explosion. The explosion hazard increase due to flame propagation was higher in the order of sugar, flour and cornstarch dust.

• The Journal of the Korea Contents Association
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• v.5 no.3
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• pp.19-28
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• 2005

It is true that internet provides consumers with an efficient way to search information with minimal effort and cost, which facilitates better decision making. Especially, previous studies revealed that the online word-of-mouth marketing is widely used as a source of consumers' information seeking and purchase decision making. Even with this importance of the online word-of-mouth communication on internet few researches have systematically addressed the issue. This study investigates the effect of consumers' motives on perceived usefulness of word-of-mouth marketing in online shopping mall contents. The results are as follows: First, choice uncertainty, perceived sacrifice, and social pressure play an important role for perceived usefulness of word-of-mouth marketing. Second, perceived usefulness has directly affected consumers' quality perception. Thus, it is essential for internet companies to find ways to encourage their customers to engage in word-of-mouth communication on their websites.

• Proceedings of the Korean Vacuum Society Conference
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• 2010.02a
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• pp.227-227
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• 2010

동력 전달을 위한 구동 부품에 대한 내마모성 개선을 통한 에너지 효율 및 부품의 수명 향상에 대한 사회적 관심이 급증하고 있다. 특히, 최근에는 자동차용 구동부품에 저마찰 내마모 특성이 우수한 Mo-N-Cu 나노복합체 박막에 대한 연구가 활발하게 진행되고 있다. 본 연구에서는 Mo-N-Cu 나노복합체 박막을 마그네트론 스퍼터링 증착법을 활용하였고, 이때 Mo 및 Cu 타겟을 적용하여 동시에 증착하였다. 진공 챔버의 진공도는 $5{\times}10^{-6}\;Torr$ 이하의 초기 진공도를 확보한 이후, 알곤 및 질소 가스를 주입하여 공정 압력이 5 mTorr 수준이 되도록 하였다. 이때 N2/(Ar+N2) = 0.5를 유지하였다. Mo-N-Cu 박막내에 Cu 함량 변화를 위해 Mo 캐소드는 D.C. 1 kW로 고정하고 Cu 캐소드에 R.F. 파워를 0, 40, 60, 80 W로 변화하였다. 박막의 두께는 증착시간을 변화하면서 $1\;{\mu}m$ 이상이 되도록 하였다. Cu 캐소드에 인가된 파워의 변화에 따라 Mo-N-Cu 박막내 Cu 함유량은 10 at.%까지 변화되는 것을 EDX 분석을 통해 확인하였다. 또한 증착된 Mo-N-Cu 박막의 표면 및 단면에 대한 FE-SEM 분석을 통하여 전형적인 주상구조를 지닌 MoN 박막에서 Cu 함량이 증가할수록 Mo-N-Cu 박막의 결정성을 방해하는 것을 확인하였다. 또한 XRD 분석을 통하여 박막의 결정 구조 분석을 하였고, Nano Indentor를 통하여 30 GPa 수준의 고경도를 지닌 박막이 형성됨을 확인하였다. 박막의 내마모 특성 평가를 위해 ball-on-disk 트라이보미터를 활용하여 마찰계수 평가를 수행하였고, Cu 함유량의 변화에 따라 마찰계수가 MoN 박막의 경우 0.8에서 Cu 함량이 5 at.%에서 0.15로 급격하게 낮아짐을 확인하였다.

• Informatization Policy
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• v.25 no.2
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• pp.46-66
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• 2018

This research explores the factors affecting infusion of public administrative information systems(IS) and analyzes its impact on work performance. For this purpose, the factors affecting the infusion of IS are classified into voluntary and involuntary motivations based on the self-determination theory that explains individual motivations. As factors for voluntary motivation, performance expectancy, personal innovativeness, and organizational citizenship behavior are proposed, while government influence, competitor influence, and the top-level management influence are proposed as factors for involuntary motivation. The analysis shows the voluntary motivation factors-performance expectancy, personal innovativeness, and organizational citizenship behavior-do affect infusion of IS, whereas the involuntary motivation factors-government influence, competitor influence, and the top-level management influence-have no statistically significant impact on the infusion of IS. The relationship between infusion of IS and work performance is found significant. While individuals are unable to decide on the adoption of IS in an involuntary environment such as in the case of using the public administrative IS, the results show that the factors related to individual autonomy have an important role in extended, active usage of IS beyond the mandatory level.

• (The)Korea Educational Review
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• v.24 no.3
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• pp.137-166
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• 2018

The purpose of this study was to analyze and present the achievements and challenges of the 70th year of the Korean Federation of Teachers' Association (KFTA). The KFTA was founded in 1947 as the Chosun Education Association, and it was the 70th anniversary of its founding in 2017. Throughout its 70?year history, the KFTA, which has emphasized and promoted expertise and professionalism, has continued to improve the professionalism of the teaching profession through research, improve the socio?economic status of teachers, and expand the welfare system in order to improve the quality of teaching and teaching environment. In addition, the KFTA contributed to the development of national education by participating in educational policies to improve education system and educational environment, as well as activities as a professional organization, and has promoted international status through the promotion of international exchange. After analyzing the academic literature and KFTA related data diachronically, this research suggested achievements and challenges as three aspects: the status as teachers' professional organizations, the activities as interests and pressure groups, and the activities as professional organizations.

• The Korean Society of Law and Medicine
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• v.18 no.1
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• pp.171-197
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• 2017

This research aims for suggesting the significance and approaching method of historical study in health law in light of its historical progress and fundamental understanding of jurisprudential method. Historical research method of health law primarily targets to investigate the changes of the law in historical circumstances. In a further practical view point, however, the purpose of the study is to understand the 'current' system of health law appropriately. In addition, historical study enables us to recognize the fact that many systems related to health law are connected and interactive. The study can even function as an important reference when designing future health law system. Therefore, health law researchers have to investigate ideological, philosophical, political, economic, or social reasons of why such rules were legislated beyond a mere confirmation of past forms of the health law system. In other words, it is not only important to understand the provisions of past health law but also to examine how the regulations have formed, how they established the regulatory power in reality. Identifying how the rule of law had been executed in the reality of law is also a crucial part of historical study.

• Journal of Korea Water Resources Association
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• v.55 no.spc1
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• pp.1295-1303
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• 2022

As the role of water distribution networks (WDNs) becomes more important, identifying abnormal events (e.g., pipe burst) rapidly and accurately is required. Since existing approaches such as field equipment-based detection methods have several limitations, model-based methods (e.g., machine learning based detection model) that identify abnormal events using hydraulic simulation models have been developed. However, no previous work has examined the impact of data uncertainties on the results. Thus, this study compares the effects of measurement error-induced pressure data uncertainty in WDNs. An artificial neural network (ANN) is used to predict nodal pressures and measurement errors are generated by using cumulative density function inverse sampling method that follows Gaussian distribution. Total of nine conditions (3 input datasets × 3 output datasets) are considered in the ANN model to investigate the impact of measurement error size on the prediction results. The results have shown that higher data uncertainty decreased ANN model's prediction accuracy. Also, the measurement error of output data had more impact on the model performance than input data that for a same measurement error size on the input and output data, the prediction accuracy was 72.25% and 38.61%, respectively. Thus, to increase ANN models prediction performance, reducing the magnitude of measurement errors of the output pressure node is considered to be more important than input node.