• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.11
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• pp.208-217
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• 2017

This study was conducted to identify the influence of awareness regarding marriage and childbirth on pre-parent's role of the nursing students. The subject were 202 nursing students in B city. Data were collected from May 11 to 15, 2015 and analyzed by t-test, ANOVA, Scheffe's test, Pearson correlation coefficients and stepwise multiple regression. Significant differences were found in pre-parent's role based on economic status, ideal number of children, and desired number of children. Pre-parent's role was negatively correlated with romantic views regarding marriage and passive views on marriage. In addition, there was a positive correlation between pre-parent's role and the attitudes towards childbirth support by the nation and corporations. Meaningful variables that influenced pre-parent's role were ideal number of children, economic status and passive views on marriage. Total explanation power was 26.9% and attitudes towards childbirth as well as toward support by the nation and corporations was the most influential factor. To enhance pre-parent's role of nursing students, it is necessary to provide childbirth support by the nation and corporations in the form of financial assistance and childcare facilities, as well as to develop educational programs describing the pre-parent's role.

• Journal of the Economic Geographical Society of Korea
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• v.13 no.3
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• pp.335-353
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• 2010

Following the emergence of a knowledge-based economy, the triple helix model has been recognized as a new - regional and national - innovation model. This model seeks to understand the innovation process that is centered upon the university-industry-government interactions. The governance of the triple helix innovation system can be divided into three models according to the structure and depth of university-industry-government interactions. In the context of evolution, the triple helix can be established through the following three processes of development; i) internal transformation of each helix, ii) impacts of one helix on another helix, and iii) horizontal interactions among three helices. In theory, the triple helix model can be covered as part of the innovation system perspective. Compared to the innovation system perspective, the triple helix model tends to pay, however, more attention to the incompleteness of innovation system and the role of university in the process of knowledge creation. In view of regional innovation, the triple helix can be sustained when the triple helix spaces, including knowledge space, consensus space and innovation space, are created and the three triple helix spaces interact with one another. The existing literature on the triple helix model tends to make selectively use of only a single method between the qualitative method and the quantitative method, although both have shortcomings to reveal the dynamic characteristics of university-industry-government relations. Therefore, research on the triple helix is required to reconcile with two research methods, which are distinct but complementary in nature.

• The Journal of the Korea Contents Association
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• v.11 no.1
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• pp.329-339
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• 2011

This study aims at investigating how English proficiency affects economic development of a country by analyzing the relationships among English proficiency, economic activities (amount of trade, R&D investment, etc), and the rate of economic growth, focusing on twenty-one non-English-speaking OECD countries. Ordinary Least Square (OLS) and Seemingly Unrelated Regression Estimation (SURE) were used for the data analysis in the study. The findings reveals that there existed little statistical significance to support the fact that English proficiency was directly related to the economic development in a positive way in many countries except Mexico, the Czech Republic, Finland, and Poland. However, English proficiency indirectly influenced the economic development in the way of increasing the amount of trade. These results can lead to the conclusion that English proficiency is not a sufficient element but a necessary one. Furthermore, it is expected that English proficiency can positively affect the economic development when it plays a part as sufficient complementary goods which make up for physical capital, technology accumulation, political stability, and worthy government.

• Journal of Korea Water Resources Association
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• v.42 no.7
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• pp.525-535
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• 2009

In this paper a heuristic method for identifying individual pipes in water pipe networks to determine specific sections of the pipes that need to be replaced due to deterioration. An appropriate minimum pipe length is determined by selecting the pipe length that has the greatest variance of the average cumulative break number slopes among the various pipe lengths used. As a result, the minimum pipe length for the case study water network is determined as 4 m and a total of 39 individual pipe IDs are obtained. The economically optimal replacement times of the individual pipe IDs are estimated by using the threshold break rate of an individual pipe ID and the pipe break trends models for which the General Pipe Break Prediction Model(Park and Loganathan, 2002) that can incorporate the linear, exponential, and in-between of the linear and exponetial failure trends and the ROCOFs based on the modified time scale(Park et al., 2007) are used. The maximum log-likelihoods of the log-linear ROCOF and Weibull ROCOF estimated for the break data of a pipe are compared and the ROCOF that has a greater likelihood is selected for the pipe of interest. The effects of the social costs of a pipe break on the optimal replacement time are also discussed.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.37 no.1
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• pp.73-82
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• 2017

In Korea, previous certification of water supply infrastructure was mainly focused on economical and physical aspects. Recently, hygienic safety of water supply service has become a sensitive and important issue to our people for evaluating the water quality with growth of economy and education system. According on water quality in 497 Korean water supply facilities, pH values in the supplied water have ranged between 5.8-8.5. However, little is known about metal leachability at the pH conditions observed in the real water supply systems because a fixed pH condition (pH 7.0) has been used in the current standard method, 'Hygienic Safety Testing Method', in water supply. In this work, we examined the effects on heavy metal leachability with pH differences in the water supply pipes which are typically used in Korea. As a result, the amounts of metal leachability were tended to increase when pH levels were decreased. Especially at pH 5.8, Cu leachability from Cu pipes was found to exceed the public health standard level even after applying a normalization factor (NF) given by the current Korea standard method. The Cr and Cu leached from stainless steel pipes, Cd, Pb, Cu, and Zn from Cu-based pipe fittings, and Zn from Zn-based pipe fittings were exceeded the Korean hygienic safety standards while, after applying the NF, concentrations of the leached metals were satisfied with the current Korean standard. The findings from this work provide implications on the needs of reforming the current hygienic safety standard methodology.

• Journal of Korea Water Resources Association
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• v.42 no.6
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• pp.457-464
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• 2009

This paper proposes methodologies for analyzing the accuracy of the proportional hazards model in predicting consecutive break times of water mains and estimating the time interval for economical water main replacement. By using the survival functions that are based on the proportional hazards models a criterion for the prediction of the consecutive pipe breaks is determined so that the prediction errors are minimized. The criterion to predict pipe break times are determined as the survival probability of 0.70 and only the models for the third through the seventh break are analyzed to be reliable for predicting break times for the case study pipes. Subsequently, the criterion and the estimated lower and upper bound survival functions of consecutive breaks are used in predicting the lower and upper bounds of the 95% confidence interval of future break times of an example water main. Two General Pipe Break Prediction Models(GPBMs) are estimated for an example pipe using the two series of recorded and predicted lower and upper bound break times. The threshold break rate is coupled with the two GPBMs and solved for time to obtain the economical replacement time interval.

• (The)Study of the Eastern Classic
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• no.32
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• pp.279-310
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• 2008

In this research, the writer investigated the thought in realism and view on education appeared in the text, GUANZI("管子") roughly. The thoughts and contemplation in GUANZI mostly contain practical issues of politics, law and economy, as well as military policy and also get involved in the education pursuing an organic relationship therewith. In GUANZI, the rule of law and morality were applied to the politics in a harmonious fashion. Although the text upheld agrarian-oriented policy in connection with nation's economy, it, however, succeeded to secure the national wealth by having implemented the polices concerned with industry and commerce in an appropriate manner. In addition, he established strong military organization through political stability and by securing economic strength. In short, this is the policy in order to pursue 'a rich nation with a strong military.' Under such situation, education made a positive contribution to meet the realistic needs in order for reinforcement of politics, economy, and military. In the level of moral education that will set right the decorum and proprieties of the people, and their loyalty and integrity, vocational training that enabled the four divisions of society, that is, the official class, farmers, artisans and merchants, to carry out their given jobs successfully was highly valued in GUANZI. These are substantial efforts in order to establish the order of community by means of putting emphasis on people's morality and loyalty, and also to create the public weal through reinforcement of producing activities of each class of society. After all, the realistic thought and view on education appeared in GUANZI can be understood as an expression of strong will to accomplish national prosperity and military strength in order to overcome disturbing situations in the society in those days.

• Proceedings of the Korea Water Resources Association Conference
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• 2009.05a
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• pp.282-286
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• 2009

1979년 준공된 수도권 광역상수도 1단계 시설은 상당한 노후화가 진행되었을 것으로 예상되며, 또한 향후 한강하류권 용수공급계획이 예정되어 있어 내부부식 및 관로손상부 개량의 시급성이 제기되었다. 이에 따라 직경 2,800${\sim}$800mm의 초대구경 도수관 53.9km의 개량을 위한 사업이 추진되었으며 시공성, 환경성, 경제성 등의 여러 항목에 대한 검토 결과 신개념 녹색공법인 비굴착식 건식일체형 공법이 최종 선정되었다. 그동안 기존관 개량공사에서 주로 사용되었던 굴착공법이 굴착에 따른 공기지연, 소음 분진 악취 등의 환경오염, 전구간 굴착에 따른 공사비 증가 등 많은 문제점을 안고 있는 것에 반해, 동사업에서 채택된 비굴착공법은 관로내에서 작업이 이루어지므로 공기단축, 환경오염 최소화에 따른 민원발생 최소화, 작업구만 굴착함에서 오는 공사비 절감 등 상대적으로 훨씬 우수한 것으로 평가된다. 동공법에 따르면 관내부 갱생공사는 '배수 및 잔류토사 제거'${\to}$'관내건조'${\to}$'표면처리'${\to}$'프라이머도장'${\to}$'본도장'의 순으로 진행된다. 일체형 장비에 의한 이와 같은 초대형관의 자동화시공은 세계에서 처음 적용되는 것이다.

• Proceedings of the Korean Vacuum Society Conference
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• 2012.02a
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• pp.223-223
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• 2012

최근 선진국의 산업구조는 반도체, 디스플레이, IT 제품 등 고부가가치 산업으로 재편되고 있으며, 이에 따라 핵심 공정장비인 고진공펌프의 수요가 급격히 증대하고 있다. 고용량/대면적/초정밀 제품을 지향하는 개발추세에 따라 핵심 공정 장비로서 크라이오펌프의 활용도가 크게 증가하며 LCD 분야 등과 같이 수소 분자와 물 분자 등의 배기가 중요한 응용분야에 크라이오펌프의 수요가 대부분을 차지하고 있다. 또한 도래하는 한미FTA 체결에 따라 반도체, IT, 디스플레이 제조 장비용 고진공펌프의 수입이 급증할 것으로 예상되어 국내 진공업체에서도 크라이오 펌프의 개발이 진행되고 있다. 국내에서는 크라이오펌프 뿐만 아니라 핵심부품인 극저온 냉동기에 대한 기반 기술이 낙후되어 있는 실정이다. 본 연구에서는 지식경제부 지원 사업인 제조기반산업원천기술개발사업에 참여기관으로 수행하여 한국기계연구원과 급속 재생형 저진동 크라이오펌프의 기술 개발을 통해 전량 수입하는 고진공 펌프인 크라이오펌프를 국산화를 도모하고자 한다. 또한, 맥동관 냉동기는 기계적 구동부가 없어 구조가 간단하여 운전이나 보수가 용이하고, 장시간 운전에 신뢰성이 높으며 제조비용이 저렴하다. 이에 (유)우성진공에서는 연구 개발을 통해 상용화 단계에 있는 맥동관 냉동기 크라이오펌프를 소개하고자 한다.

• Proceedings of the Korean Vacuum Society Conference
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• 2012.02a
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• pp.112-112
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• 2012

최근 선진국의 산업구조는 반도체, 디스플레이, IT 제품 등 고부가가치 산업으로 재편되고 있으며, 이에 따라 핵심 공정장비인 고진공펌프의 수요가 급격히 증대하고 있다. 고용량/대면적/초정밀 제품을 지향하는 개발추세에 따라 핵심 공정 장비로서 크라이오펌프의 활용도가 크게 증가하며 LCD 분야 등과 같이 수소분자와 물 분자 등의 배기가 중요한 응용분야에 크라이오펌프의 수요가 대부분을 차지하고 있다. 또한 도래하는 한미FTA 체결에 따라 반도체, IT, 디스플레이 제조 장비용 고진공펌프의 수입이 급증할 것으로 예상되어 국내 진공업체에서도 크라이오펌프의 개발이 진행되고 있다. 국내에서는 크라이오펌프 뿐만 아니라 핵심부품인 극저온 냉동기에 대한 기반 기술이 낙후되어 있는 실정이다. 본 연구에서는 지식경제부 지원 사업인 제조기반산업원천기술개발사업에 참여기관으로 수행하여 한국기계연구원과 급속 재생형 저진동 크라이오펌프의 기술개발을 통해 전량 수입하는 고진공 펌프인 크라이오펌프를 국산화를 도모 하고자 한다. 또한, 맥동관 냉동기는 기계적 구동부가 없어 구조가 간단하여 운전이나 보수가 용이하고, 장시간 운전에 신뢰성이 높으며 제조비용이 저렴하다. 이에 (유)우성진공에서는 연구 개발을 통해 상용화 단계에 있는 맥동관 냉동기 크라이오펌프를 소개하고자 한다.