본 연구는 호주-중국 무역분쟁을 국제정치의 상호역학관계 관점에서 분 석하였다. 연구목적을 달성하기 위해 시스템사고 이론에 기반하여 인과지 도분석을 실시하였다. 연구를 통해 얻어진 결과는 다음과 같다. 첫째, 경제 적 영역에서 시작된 무역분쟁은 다양한 영역으로 확산되면서 복잡한 국제 정치시스템으로 진화하는 것으로 나타났다. 둘째, 다양한 변수들이 작동하 는 국제관계 현실에서 절대적 가치만을 선호하는 중국의 보호된 가치(중화 사상, 하나의 중국, 중국식 인권주의)는 정책결과의 확증편향을 유발하면서 국제관계에서 다양한 변수들의 동태적 변화를 인식하지 못하게 하는 원인 으로 작용하는 것으로 나타났다. 셋째, 한국과 호주는 중국과의 외교관계에 서 상당히 유사한 조건을 가지고 있다는 점에서 호주-중국의 무역분쟁에서 호주가 사용한 전략은 한국의 정책결정에 교훈을 주고 있다는 점을 발견할 수 있었다.

Ppuri or Root technology primarily includes technologies such as casting, mold, plastic working, welding, heat treatment and surface treatment. It is regarded as an essential element for improving the competitiveness of the quality of final products. This study investigates the current status of smart factory implementation for Ppuri companies and analyzes the influencing relationships among various company factors. The factors affecting smart factory implementation for Ppuri companies are sales, exports, number of technical employees, and holding corporate research institutes. In addition, this research shows that even if smart factory implementation is pursued for data collection, data utilization is not implemented properly. Thus, it is suggested that the implementation of smart factories requires not only the availability of facilities and systems but also proper data utilization.

The domestic catch of squid is decreasing every year. Import volume is increasing to replace these domestic products. Import volume is expected to increase in the future, so it is necessary to study import substitution. Therefore, in this study, after selecting frozen squid, which accounts for the majority of imported squid, as the target fish species, China, Chile and Peru, which account for the majority of frozen squid imports, will be selected as the target countries for analysis. Then, the demand function of squid is estimated using the Rotterdam model, the inverse Rotterdam model, AIDS and inverse AIDS, which are the simultaneous equation demand types, and then elasticity is derived. After that, these models are compared in terms of significance, theoretical fit and practical fit.

목적 : 본 연구는 작업치료과 대학생들의 전공선택동기와 전공만족도, 대학생활적응 간에 어떠한 관계가 있는지 알아보고, 전공만족도가 전공선택동기와 대학생활적응의 관계에서 매개효과를 갖는지를 검증하는 것이다. 연구방법 : 수도권 소재 전문대학의 작업치료과 재학생 262명을 대상으로 설문조사를 진행하였다. 자료분 석은 변수들 간의 상관성을 알아보기 위하여 피어슨 상관분석을 실시하였으며, 다음으로는 전공선택동기 가 대학생활적응에 미치는 영향에서 전공만족도의 매개효과를 알아보기 위해 위계적 회귀분석을 실시하 였다. 결과 : 작업치료과 대학생들의 전공선택동기, 전공만족도, 대학생활적응도의 평균은 각각 3.20점, 3.56점, 3.28점이었으며 전공선택동기와 전공만족도, 대학생활적응도 간의 상관관계는 유의미한 정적 상관성이 있는 것으로 나타났다. 그리고 전공선택동기가 대학생활적응에 미치는 영향에서 전공만족도의 부분매개 효과가 나타났다(β = .334, β = .371). 결론 : 따라서 작업치료과 대학생들에게 전공선택동기는 대학생활적응에 직접적인 영향을 주고 있을 뿐 아 니라 전공만족도를 통해서도 대학생활적응에 간접적인 영향을 주고 있음을 시사한다. 본 연구결과는 전 공만족도는 대학생활적응을 높이는 요인임을 확인하였으며, 대학생활적응을 높이기 위해서는 전공만족도 의 역할이 중요하다.

PURPOSES : In a previous study, an error was detected in data pertaining to the direction and velocity of a roller. Hence, in this study, the correlation between these two variables and acceleration data is analyzed. Relevant algorithms are developed by adding variables to existing algorithms. METHODS : A tachometer and GPS are used to acquire the velocity, compaction direction of rollers, and number of compactions. Subsequently, data input to an accelerometer are compared and analyzed. RESULTS : Based on FFT analysis, it is discovered that the data are inaccurate when a forward reverse is performed. Using the GPS, the velocity of the roller is differentiated based on the number of pledges, and then added as a variable to the algorithm. Subsequently, it is evaluated and analyzed only with data during forward movement based on changes in the latitude and longitude. CONCLUSIONS : It is discovered that the acceleration data values from both the left and right rollers differ owing to their weight difference, as indicated by the asphalt gradient. Data changes based on asphalt gradients are analyzed using gyro sensors. If the correlation between the two sets of data is high, then the algorithm is advanced by introducing a cross spectrum after calibrating the acceleration value based on the gradient.

목적: 안경사 직무를 분석하여 국가시험 교과목과의 연계성을 확인하고 대학의 시험과목 비율과 교육과정 개발에 기초자료를 제공한다. 방법 : 안경사 872명과 안경광학과 교수 99명을 대상으로 5개의 직무영역과 18개의 일로 구성된 설문을 조사하여 분석하였다. 결과 : 안경사 직무분석에서 작업의 중요도와 필요도가 모두 높은 영역에서 필요능력인 지식과 기술을 도출하여 안경조제가공(39.1%), 시력검사(27.5%) 및 콘택트렌즈(14.8%), 기타(18.6%)의 비중을 통해 안경사 1차 직무 분석(2000년)과 비교해 검안안경사 분야로 안경사의 직무가 이동된 것으로 나타났다. 결론: 안경사 직무에서의 변화는 안경사 국가시험과 대학의 교육과정에 적절히 반영되어야 할 것으로 생각된다.

목적: 본 연구에서는 근시도에 따라 나누어 동공크기에 의한 굴절이상도의 차이에 영향을 미치는 요인을 알아보고자 하였다. 방법 : 안경원을 방문하여 i.profilerplus(Zeiss, Berlin, Germany) 검사를 시행 받은 18~56세의 성인 73명 (73안)을 대상으로 하였다. 대상자를 경도 근시, 중등도 근시, 그리고 고도 근시로 분류하였다. 각 근시 그룹에서 동공크기(5, 3 mm)에 따른 구면렌즈 대응치의 차이를 비교하였다. Multiple regression analysis를 시행하여 각 근시 그룹에서 동공크기에 따른 평균 구면렌즈 대응치의 차이에 영향을 미치는 인자를 평가하였다. 결과 : 평균 구면렌즈 대응치는 5 mm에 비해 3 mm일 때 경도 근시(–1.99±0.76 D와 -1.68±0.72 D), 중등도 근시(–4.24±0.97 D와 -4.04±0.90 D), 그리고 고도 근시(-8.06±1.51 D와 -7.95±1.40 D) 모두 유의하게 낮았다. 경도와 고도 근시에서는 구면수차와 수직코마수차가 동공크기에 따른 평균 구면렌즈 대응치의 차이에 영향을 미쳤으며, 중등도 근시에서는 구면수차가 동공크기에 따른 평균 구면렌즈 대응치의 차이에 영향을 미치는 것으로 나타났다. 결론 : 근시도에 따라 동공크기가 변화할 경우 고위수차가 영향을 미치는 것으로 나타났으며, 안경사는 근시안의 경우 야간시에서 흐린 이미지로 인한 불편함의 가능성이 있음을 이해하고 안경처방을 해야 할 것으로 생각한다.

Seismic fragility analysis of a structure is generally performed for the expected critical component of a structure. The seismic fragility analysis assumes that all the components behave independently in a structural system. A bridge system consists of many inter-connected components. Thus, for an accurate evaluation of the seismic fragility of a bridge, the seismic fragility analysis requires the composition of probabilities considering the correlation between structural components. This study presented a procedure to obtain the seismic fragility curve of a bridge system, considering the correlation between bridge components. Seismic fragility analysis was performed on a PSC bridge that is considered as the central infrastructure. The analysis results showed that the probability of the seismic fragility curve of the bridge system was higher than that of each bridge component.

본 연구의 목적은 청소년의 주관적 행복감에 영향을 미치는 청소년활동 만족도, 청소년활동 참여정도, 자아존중감 및 공동체의식 간의 구조적 관계를 규명하는데 있다. 이를 위해 한국청소년정책연구원에서 실시한 ‘청소년활동 참여 실태조사’의 2018년도 자료 중 고등학생 3,410명을 대상으로 경로분석을 실시하였으며, 주요 결과를 요약하면 다음과 같다. 첫째, 청소년활동 만족도, 청소년활동 참여정도, 자아존중감, 공동체의식 및 청소년의 주관적 행복감 간의 정적 상관관계가 있었다. 둘째, 청소년의 주관적 행복감에 자아 존중감과 공동체의식은 직접적인 영향을 미쳐 청소년의 자아존중감과 공동체의식 수준이 높을수록 주관적 행복감이 높았고, 청소년의 자아존중감과 공동체의식은 청소년활동 만족도와 참여정도에 영향을 받아 청소년활동 만족도가 높고 청소년활동 참여정도가 많을수록 자아존중감이 높고 공동체의식 수준이 높게 나타났으며, 자아존중감이 높을수록 공동체의식이 높게 나타나청소년활동 만족도 및 참여정도는 청소년 주관적 행복감에 간접적인 영향을 미쳤다. 본 연구결과가 청소년의 주관적 행복감 증진을 위한 기초자료나 관련 정책의 참고자료로 활용되기를 기대한다.

This study was conducted to help manage total floating bacteria and fungi in the indoor air by studying the characteristics of total floating bacteria and fungi according to the indoor CO2 concentration of daycare centers. The sampling and analysis of samples was based on the indoor air quality process test method, and the result analysis was conducted using the SPSS statistical program to perform correlation and regression analysis. Correlation and regression results show that CO2 and total airborne bacteria showed positive relationships, but airborne mold did not show relevance. In addition, in order to identify factors affecting airborne mold, correlation analysis and regression analysis were performed regarding total airborne bacteria, PM10, PM2.5, HCHO, outdoor mold, I/O ratio, indoor temperature/ humidity, area per classroom and volume. The results showed that the factors affecting airborne mold were I/O ratio, outdoor airborne mold, and total airborne bacteria. Research results show that CO2 and total airborne bacteria can be reduced and controlled by natural ventilation, and in the case of airborne mold, mechanical forced ventilation such as hoods will be necessary due to the introduction of outdoor airborne mold. In addition, it is necessary to consider I/O ratio criteria in order to confirm effective indoor mold contamination, taking into account the effect of outdoor mold inflow.

There is an increasing need for complex and large projects to be carried out quickly. As the duration, size, and cost of the project increase, concerns about project failure are also rising. Finding factors that hinder the performance of an effective project and eliminating them in advance or controlling and managing them more effectively can be a more direct way to secure the success of the project. Previous studies have identified compositional dimensions that are classified according to attributes, covering the various obstacles that affect the success of the project through existing literature. It is a follow-up to previous research. Using DEMATEL techniques, we would like to propose to explore the appropriate measures that an entity and organization can take by identifying the causality between factors through cross-impact analysis of project disabilities and even presenting factors that may arise when they are identified. As a result of the analysis, according to the indicators to evaluate the importance, 8 factors were found to be relatively important factors, excluding the factors that Failure of project feasibility analysis and Technical environment change. In addition, 5 factors were found to be causative factors; Technical environment change, Unclarity project plan, Strategic consistency error, Inaccuracy of requirement definition, and Failure of project feasibility analysis. In contrast, the remaining 5 factors were found to be the result factors; Lack of benefits realization, Negative attitude of top management, Stakeholder conflict, Difficulty of process management, and Disturbance of communication.

Recently, the importance of project management has increased due to the scale and complexity of the construction projects. Therefore, this study conducted a survey on construction companies and related public institutions to verify the relationship between the role of the Project Management Office(PMO) and PM leadership for project performance. Based on this, the effect of the PMO role on the project performance was identified and the moderating effect of PM leadership was analyzed. As a result, first, the role of the PMO was found to have an influential on the project performance. Second, the PM leadership was verified to has a moderating effect in the relationship between the PMO role and the project performance. The purpose of this study is to analyze the influential of the role of PMO on project performance in the construction industry to suggest the necessity of PMO in the construction industry and the need to adopt PMO in large-scale construction projects and analyze the moderating effect of PM leadership on project performance.

The ILI, developed by the IWA (International Water Association), has been used in many countries as an indicator of water leakage. In Korea, the revenue water has been used as a performance indicator for waterworks although there is an opinion to replace it with the ILI. Hence, it has been necessary to investigate whether the ILI can replace the revenue water in Korea. The four main operating indicators (i.e., water service population, profit-loss ratio, fiscal self-reliance, and aged pipe rate) of 162 Korean waterworks were compared with the ILI with the linear regression method. Local water authorities with more than 1 million water service population, with more than 60% profit-loss ratio, more than 40% and less than 60% fiscal self-reliance, and more than 20% aged pipe rate showed meaningful correlation between the four parameters and the ILI. In the remaining cases, their correlations were little or weak. This means that using the ILI may not be an efficient method to represent the performance of the water supply system in Korea because of the lack of UARL (Unavoidable Annual Real Losses) data accuracy. To use the ILI in Korea, it will be required to carry out an additional research to accumulate reliable CARL (Current Annual Real Losses) and UARL data in the future.