• 천문학회지
• /
• 제41권2호
• /
• pp.23-37
• /
• 2008

The high-resolution optical region spectroscopic data of the symbiotic nova AG Peg secured with the Hamilton Echelle Spectrograph at the Lick Observatory, have been analyzed along with the International Ultraviolet Explorer UV archive data. We measure about 700 line intensities in the wavelengths of 3859 to $9230{\AA}$ and identify about 300 lines. We construct pure photoionization models that represent the observed lines and the physical condition for this symbiotic nova. The spectral energy distribution of the ionizing radiation is adopted from stellar model atmospheres. Based on photoionization models, we derive the elemental abundances; C & N appear to be similar to be smaller than the Galactic planetary nebular value while O is enhanced. Our result is compared with the Contini (1997, 2003) who analyzed the UV region spectral data with the shock + ionization model. The Fe abundance appears to be enhanced than that of normal planetary nebulae, which suggests that AG Peg may have formed in the Galactic disk. The models indicate that the temperature of the central star which excite the shell gas may have fluctuated to an unexpected extent during the years 1998 - 2002.

• 정보교육학회논문지
• /
• 제23권6호
• /
• pp.521-528
• /
• 2019

본 연구의 목적은 초등정보교육에서 컴퓨팅 사고를 신장시키기 위한 SW교육 콘텐츠를 설계하고 개발하는 것이다. SW교육 프로그램은 지식, 기능, 태도의 세 개 영역으로 나누었고, 컴퓨팅사고의 추상화, 자동화, 가치화로 연계하여 교육 프로그램을 개발하였다. 콘텐츠는 3개의 레벨로 나누고, 각각 16차시로 구성 하였다. 개발한 교육 프로그램에 대해 전문가 19인을 대상으로 내용 타당도를 실시한 결과 타당성이 높게 나타났다. 본 연구가 SW교육을 실시하는데 있어 컴퓨팅 사고를 신장하는데 도움이 되기를 바란다.

• 한국농촌건축학회논문집
• /
• 제14권2호
• /
• pp.43-50
• /
• 2012

According to the aging acceleration phenomenon of the population, Korean society is progressing toward the insecurity society on the 'blessing' or 'disaster'. The purpose of this paper is to establish direction of planning about the dwelling form of collective housing for the senior citizen who lives alone in rural and fishing villages. This focus of study is closely related to the health of the elderly and dwelling form preference. The results of research are as follows. First, the dwelling type of collective housing should be developed for elderly living alone, that must be secured by community life and private life at the same time. Second, it should be supported by such a level of application with Universal Design and Barrier Free Design. Third, collective housing served to the design that the elderly care, as one of the domiciliary care is value in having fact to psychological, physical intention. Fourth, it should be developed visit care or call care for welfare system service and community service manpower on the various types.

• 한국지하수토양환경학회지:지하수토양환경
• /
• 제23권3호
• /
• pp.10-26
• /
• 2018

This paper reviews the soil conservation policies (SCP) in the global community and suggests the improved options in SCP in Korea. Soil Environment Conservation Act in Korea states soil is a valuable natural resource and it's value should be enhanced to provide the benefits that soil ecosystem can offer to people. However, SCP in Korea limits its application to not only the scope of soil environment but also the issues on soil pollution. The SCPs in the advanced countries have shifted their scopes from soil environment to soil ecosystem, put emphasis on the conservation of soil health rather than soil quality, and set the goals to optimize the soil ecosystem services to people while minimizing the soil threats. In this context, the soil security initiative was recently proposed to accomplish this goal while employing the nexus concept to bridge the soil ecosystem services with water, atmosphere, climate and biodiversity. Therefore, the key policies in soil conservation in Korea should expand the scope from soil environment to soil ecosystem, focus on soil health management, and develop the holistic governance among diverse stakeholder to maximize the soil ecosystem services. Soil ecosystem should be secured by national soil policies for human health.

• 수산경영론집
• /
• 제50권3호
• /
• pp.73-86
• /
• 2019

The purpose of this study is to provide logical and policy justification for the feasibility and sustainability of the project through analysis of economic ripple effects of the fishing village new deal 300 project. To do this, we applied the industry-related analysis, which is mainly used to analyze the economic ripple effects, to the fishing village new deal 300 project. The industry association analysis classifies the detailed project of the preliminary plan for the selection of the business into the software business such as the hardware business and the capacity enhancement in the construction field and analyzes the economic ripple effect through the inter-industry association. As a result, it is expected that the fishing village new deal 300 project will have a positive economic impact. When the total investment of 3 trillion won is invested in the project, it is estimated that the production inducement effect and the value added effect are 5,545.3 billion won and 2,102.7 billion won, respectively. In addition, 62,005 get job inducements, where 10,952 employment inducements were associated with job creation. The analysis of the above impacts seems to have secured the logical justification for the implementation of the fishing village new deal 300 project.

• 가족자원경영과 정책
• /
• 제23권1호
• /
• pp.83-97
• /
• 2019

This study aims to analyze the elements to enhance and activate the quality of life by establishment of family-friendly environment through face-to-face interviews in family-friendly certified firms in UIsan. As a result, its activation is possible when each party of companies- employees-government tries to change, and its main elements and outcomes are as follows. First, 'management philosophy of the company representative' showed to directly affect development of flat organization culture and system activation, with respect to the companies. Second for employees, 'value changes to prioritize work-life balance' demonstrated to affect the utilizations and establishment of family-friendly systems within the organization as the critical element. Lastly, it is considered for government to be able to activate this if 'delivery system with professionality' is secured to help 'legalization of policy,' company productivity, and work-life balance of employees. On the other hand, further studies on the elements to be able to activate family-friendly certifications and analysis on its justification are required by expanding the number of companied in Ulsan.

• 대한방사선기술학회지:방사선기술과학
• /
• 제44권4호
• /
• pp.351-358
• /
• 2021

This research project is a program promoted to seek diversification of domestic radioactive waste analysis institutions, and seeks public development, win-win cooperation, and cooperation between the entrusted institution and the entrusted institution. Accordingly, the entrusted institution established a standard analysis procedure for establishing a quality control system for radioactivity analysis, establishing a radiation control zone, obtaining KOLAS accreditation, and performing proficiency tests, which are the performance ranges requested by the entrusted institution, and intersecting the radioactive isotope waste generated at the actual site. Verification was performed to confirm the analysis quality. In addition, facilities and equipment for radioactivity analysis were supplemented and expanded, and the basic technology foundation and technical skills were secured through securing professional technicians and education/training. It is judged that the entrusted institution will contribute to securing radiation safety through the smooth execution of treatment, disposal, and transportation through value creation and analysis of radioactive waste generated by radioactive isotope-using institutions (research institutes, hospitals, industries, etc.) by succeeding in this research project do.

• Tribology and Lubricants
• /
• 제38권4호
• /
• pp.128-135
• /
• 2022

In the product development process, the reliability of the product can be secured through durability tests. However, since the durability test method is expensive and time consuming, a method to save time and money by utilizing virtual product development (VPD) is required. However, research on the accuracy of the results of virtual product development is required. In this paper, an accelerated durability test was designed and conducted using a planetary gear decelerator. And an analysis model under the same conditions was created and simulated. To correlate the results of the experiment with the results of the analytical model, created a model that can discriminate the wear region using one of the data mining methods, the k-means algorithm method and HSV (Hue, Saturation, Value). The wear area is compared by counting the number of pixels defined as wear through a discrimination model. A similar ratio was calculated by comparing the pixel ratio of the area determined as wear in the entire area. It showed a similar ratio of about 70%, and it is necessary to improve the discrimination method.

• International Journal of Internet, Broadcasting and Communication
• /
• 제14권3호
• /
• pp.91-100
• /
• 2022

Major developed countries are seriously considering smart factories to increase their manufacturing competitiveness. Smart factory is a customized factory that incorporates ICT in the entire process from product planning to design, distribution and sales. This can reduce production costs and respond flexibly to the consumer market. The smart factory converts physical signals into digital signals, connects machines, parts, factories, manufacturing processes, people, and supply chain partners in the factory to each other, and uses the collected data to enable the smart factory platform to operate intelligently. Enhancing personalized value is the key. Therefore, it can be said that the success or failure of a smart factory depends on whether big data is secured and utilized. Standardized communication and collaboration are required to smoothly acquire big data inside and outside the factory in the smart factory, and the use of big data can be maximized through big data analysis. This study examines big data analysis and standardization in smart factory. Manufacturing innovation by country, smart factory construction framework, smart factory implementation key elements, big data analysis and visualization, etc. will be reviewed first. Through this, we propose services such as big data infrastructure construction process, big data platform components, big data modeling, big data quality management components, big data standardization, and big data implementation consulting that can be suggested when building big data infrastructure in smart factories. It is expected that this proposal can be a guide for building big data infrastructure for companies that want to introduce a smart factory.

• 해양환경안전학회지
• /
• 제29권3호
• /
• pp.288-295
• /
• 2023

The purpose of this study is to evaluate the feasibility of the new marine leisure ships. In order to achieve the research purpose, the cost and income were calculated based on the operating of other marine leisure ships, and the feasibility of the project was empirically analyzed. This study established a research model that applies the values derived by empirically analyzing ships with similar specifications, to the new marine leisure ships. We then calculated the cost-benefit analysis, net present value, and internal return, and evaluated the feasibility of the project based on this. As a result of the business feasibility analysis of investing in marine leisure ship, it was found that economic feasibility exists with a B/C of 1.042 and 1.049 for new and secondhand ships, respectively; however, considering the stability of the ship and the publicity and continuity of the business operation, it is recommended to invest in new ships compared to secondhand ships. The total benefit over the 10-year operating period using a social discount rate of 4.5% was evaluated to be about KRW 292.0 billion, which is higher than the total cost of KRW 256.6 billion. In conclusion, the profitability analysis showed that the B/C was 1.042, the NPV was KRW 193 billion, and the IRR was 2.1%, which indicates that profitability is weakly secured.