PURPOSES : As evaluation methods for road paving materials become increasingly complex, there is a need for a method that combines computational science and informatics for new material development. This study aimed to develop a rational methodology for applying molecular dynamics and AI-based material development techniques to the development of additives for asphalt mixtures. METHODS : This study reviewed relevant literature to analyze various molecular models, evaluation methods, and metrics for asphalt binders. It examined the molecular structures and conditions required for calculations using molecular dynamics and evaluated methods for assessing the interactions between additives and asphalt binders, as well as properties such as the density, viscosity, and glass transition temperature. Key evaluation indicators included the concept and application of interaction energy, work of adhesion, cohesive energy density, solubility parameters, radial distribution function, energy barriers, elastic modulus, viscosity, and stress-strain curves. RESULTS : The study identified key factors and conditions for effectively evaluating the physical properties of asphalt binders and additives. It proposed selective application methods and ranges for the layer structure, temperature conditions, and evaluation metrics, considering the actual conditions in which asphalt binders were used. Additional elements and conditions considered in the literature may be further explored, considering the computational demands. CONCLUSIONS : This study devised a methodology for evaluating the physical properties of asphalt binders considering temperature and aging. It reviewed and selected useful indicators for assessing the interaction between asphalt binders, additives, and modified asphalt binders and aggregates under various environmental conditions. By applying the proposed methods and linking the results with informatics, the interaction between asphalt binders and additives could be efficiently evaluated, serving as a reliable method for new material development.
본 연구는 국가 연구개발(R&D) 과제 데이터를 기반으로 국내 화장품 산업의 연구개발 동향을 분석하여 중소기업의 경쟁력 강화 방안을 제시하고자 하였다. 2019년부터 2023년까지의 화장품 관련 국가 R&D 과제 데이터를 활용하여 연도별, 주요 수행 주체, 지역적 특성, 주요 부처, 주요 기능 및 효능별 R&D 현황을 종합적으로 분석하고 고찰함으로써, 중소기업 R&D의 방향성 및 전략을 도출하였다. 분석 결 과, 화장품 산업은 중소기업을 중심으로 다양한 기능성 제품 개발에 주력하고 있으며, 최근에는 특히 친환 경적이고 지속 가능한 소재 개발에 큰 비중을 두고 있는 것으로 나타났다. 지역적으로는 경기도와 충청북 도에서 R&D 활동이 가장 활발하며, 이는 지역 산업의 R&D 역량이 높음을 반영한다. 본 연구는 국가 R&D 과제 데이터 기반의 체계적인 R&D 종합 분석을 통해 화장품 산업의 최근 동향을 파악하고, 중소기 업의 시장 경쟁력 강화 및 지속 가능한 성장 전략 수립에 필요한 근거를 제공하였다. 이러한 연구 결과는 중소기업 뿐만 아니라 정책 입안자에게도 유용한 정보와 통찰을 제공하여, 화장품 산업의 발전을 위한 정 책 수립 및 실행에 중요한 기초자료로 활용될 수 있을 것이다.
The sustainable development of livelihood is of great significance to improve the livelihood of farmers. It‘s necessary to broaden farmers’ livelihood strategy choices. Intangible cultural heritage tourism diversifies livelihoods and improves stability of farmers‘ lives. Taking Yangjiabu Folk Art Park and Red Sorghum Movie City as research objects, this study uses sustainable livelihood analysis framework, in-depth interviews, and participatory observation methods to explore the impact of intangible cultural heritage tourism on sustainable livelihoods, providing reference for rural development in need of enriching livelihood strategies. The research finds that different paths of intangible cultural heritage tourism lead to different accumulation of livelihood capital. Therefore, when planning and developing intangible cultural heritage tourism, rural areas should solve the shortage of livelihood capital brought by different types of development paths, promoting sustainable development of intangible cultural heritage tourism and farmers’ livelihoods. Secondly, in the process of rural development of intangible cultural heritage tourism, there is a mutual transformation and substitution, mutual influence and restriction relationship between different livelihood capital. Rural development of intangible cultural heritage tourism needs to consider the relationship between various livelihood capital, ensuring they can promote each other and coordinate development.
산림치유는 다양한 자연의 요소를 활용하여 인체에 면역력을 높이는 건강증진 활동이다. 산림치유는 스트레스 해소, 삶의 질 향상, 심폐기능 향상, 혈액순환 등 심리적·생리적으로 긍정적 영향을 주는 것으 로 밝혀졌다. 그러나 산림치유 연구는 대부분이 프로그램 효과검증 위주의 연구로 산림치유자원 효과 에 대한 검증은 미비한 실정이다. 본 연구는 산림치유자원의 효과검증을 위해 숲 방문 이용객이 느끼는 산림치유자원인 피톤치드, 음이온 등을 측정하는 척도개발과 이에 따른 치유효과를 검증하는데 목적 이 있다. 효과검증을 위한 척도개발을 위해 선행연구 분석 후 산림치유자원과 치유효과를 선정하고 척 도를 구성하였다. 명품숲 방문객 대상으로 설문을 실시하여 531부의 데이터를 수집하였다. 데이터 분 석결과 문항신뢰도는 Cronbach's alpha값 산림치유자원 항목 0.928, 치유효과 항목 0.908로 신뢰할만한 내적일치도로 나타났다. 선정된 14종의 치유효과는 신체·생리, 심리, 사회요인으로 구성되어 내용의 타당도를 확인하였다. 본 연구는 구조방정식 모델을 검증하여 적합성을 확인하고 산림이용객이 느끼 는 산림치유자원의 효과 검증과 인식정도를 측정할 수 있는 첫 척도를 개발한 것에 의의가 있다. 본 연구 에서 개발된 척도를 사용해 데이터를 축척하고 분석한다면 산림치유자원과 치유효과 구명의 기준 자 료가 될 것이다. 또한, 실제 산림에서 측정한 자원 값과의 비교연구를 통하여 척도의 신뢰도 타당도를 더 높인 척도로 보완할 것을 제언한다.
콘크리트 포장의 조기 파손을 초래하는 콘크리트 혼합물의 품질 저하는 최근 종종 발생되고 있다. 이로 인한 유지보수 비용 또한 증 가하는 추세이다. 본 연구는 이러한 문제를 해결하고자 콘크리트 배합 시 효과적으로 유변학적 특성을 측정하여 콘크리트 품질을 예 측할 수 있는 시제품 개발을 연구 중이다. 현재 상용화되어 사용되고 있는 ICAR Plus Rheometer 장비의 이론을 변경 적용하여, 본 시제품 Twin Shaft Rheometer mixer를 개발하였다. 동시에 레오미터 장비를 활용해 유변학적 특성을 확인하고 측정하였다. 콘크리트 의 변형과 움직임을 분석하기 위해 수직, 수평 거동의 비교분석을 진행하였고, 흐름 저항성과 토크 점성을 이용하여 유변학적 특성을 기존 장비와 비교 분석하였다. 그 결과 절댓값의 차이는 존재하나 선형적 유사성을 가지는 것을 알 수 있었다. 높은 정확성을 위해 추 가연구는 진행하고 있다. 추가로 슬럼프 측정 센서 또한 개발 진행 중이며, 이 장비는 마이크로파를 통해 매질의 변화를 측정하여 슬 럼프를 유추하는 센서로 더욱 정밀한 결과값을 위해 추가연구 진행하고 있다.
This article presents the crucial role played by the French underground research laboratory (URL) in initiating the deep geological repository project Cigéo. In January 2023, Andra finalized the license application for the initial construction of Cigéo. Depending on Government’s decision, the construction of Cigéo may be authorized around 2027. Cigéo is the result of a National program, launched in 1991, aiming to safely manage high-level and intermediate level long-lived radioactive wastes. This National program is based on four principles: 1) excellent science and technical knowledge, 2) safety and security as primary goals for waste management, 3) high requirements for environment protection, 4) transparent and openpublic exchanges preceding the democratic decisions and orientations by the Parliament. The research and development (R&D) activities carried out in the URL supported the design and the safety demonstration of the Cigéo project. Moreover, running the URL has provided an opportunity to gain practical experience with regard to the security of underground operations, assessment of environmental impacts, and involvement of the public in the preparation of decisions. The practices implemented have helped gradually build confidence in the Cigéo project.
In this study, project information of government-funded research institute in the food field was collected and analyzed to systematically identify the factors affecting the process of transferring technological achievements of public research institute to the private sector. This study hypothesized that human resources, financial resources, and technological characteristics as input factors of R&D projects affect output factors, such as research papers or patents produced by R&D projects. Moreover, these outputs would serve as drivers of the technology transfer as one of the R&D outcomes. Linear Regression Analysis and Poisson Regression Analysis were conducted to empirically and sequentially investigate the relationship between input factors and output and outcome of R&D projects and the results are as follows: First, the principle investigator's career and participating researcher's size as human resource factors have an influence on both the number of SCI (science citation index) papers and patent registration. Second, the research duration and research expenses for the current year have an influence on the number of SCI papers and patent registrations, which are the main outputs of R&D projects. Third, the technology life cycle affects the number of SCI papers and patent registrations. Lastly, the higher the number of SCI papers and patent registrations, the more it affected the number of technology transfers and the amount of technology transfer contract.
This study deeply discusses the development status of e-learning in basic music education in China, and summarizes the characteristics and development of music education course content, resources, evaluation and certification in the three countries through comparative analysis with e-learning platforms in South Korea and the United States, revealing the development trends and differences of global online music teaching. In the strategic analysis part, it is pointed out that, firstly, the development of basic music online teaching needs to be combined with online and offline hybrid teaching to promote the development of music education. Secondly, while learning from the advanced experience of e-learning in other countries, we should pay attention to innovative education methods、 expand the subject content. Finally, we should pay attention to the cultivation of students' learning ability to facilitate the establishment of an efficient learning model. The innovation of this paper lies in the comprehensive and in-depth research and comparison of the characteristics and case analysis of e-learning in music education in China, and at the same time, combined with the experience of South Korea and the United States, the implementation conditions and strategies for the situation in China are proposed, which provides strong theoretical support and practical guidance for the development of e-learning in music education in China based on the practical experience of different countries, and provides specific suggestions for further optimizing the practice of online music teaching.
In order to respond to environmental pollution, developed countries, including Korea, have begun to conduct research to utilize hydrogen energy. For mass transfer of hydrogen energy, storage as liquid hydrogen is advantageous, and in this case, the volume can be reduced to 1/800. As such, the transportation technology of liquefied hydrogen for ships is expected to be needed in the near future, but there is no commercialized method yet. This study is a study on the technology to test the performance of the components constituting the membrane type storage container in a cryogenic environment as a preparation for the above. It is a study to find a way to respond by analyzing in advance the problems that may occur during the shear test of adhesives. Through this study, the limitations of ISO4587 were analyzed, and in order to cope with this, the specimen was supplemented so that fracture occurred in the adhesive, not the adhesive gripper, by using stainless steel, a low-temperature steel, to reinforce the thickness. Based on this, shear evaluation was performed under conditions lowered to minus 243℃, and it was confirmed that the breaking strength was higher at cryogenic temperatures.
Kori-1 and Wolseong-1 nuclear power plants were permanently shut down in June 2017 and December 2019, and are currently in the preparation stage for decommissioning. In this regard, it is necessary to secure nuclear power plant decommissioning capacity in preparation for the domestic decommissioning marketplace. To address this, the Korea Research Institute of Decommissioning (KRID) was established to build a framework for the development of integrated nuclear decommissioning technology to support the nuclear decommissioning industry. The institute is currently under construction in the Busan-Ulsan border area, and a branch is planned to be established in the Gyeongju area. Recently, R&D projects have been launched to develop equipment for the demonstration and support verification of decommissioning technology. As part of the R&D project titled “Development and demonstration of the system for radioactivity measurement at the decommissioning site of a nuclear power plant”, we introduce the plan to develop a radioactivity measurement system at the decommissioning site and establish a demonstration system. The tasks include (1) measurement of soil radioactive contamination and classification system, (2) visualization system for massive dismantling of nuclear facilities, (3) automatic remote measurement equipment for surface contamination, and (4) bulk clearance verification equipment. The final goal is to develop a real-time measurement and classification system for contaminated soil at the decommissioning site, and to establish a demonstration system for nuclear power plant decommissioning. The KRID aims to contribute and support the technological independence and commercialization for domestic decommissioning sites remediation of nuclear power plant decommissioning site by establishing a field applicability evaluation system for the environmental remediation technology and equipment demonstration.
The origin and evolution of Chinese characters (hanzi, 漢字), the reasons for its stability and longevity, and its future are some core issues in the study of Chinese characters. We have proposed three research models to tackle these problems: (1). Taking advantage of the logographic nature of Chinese characters, we have used a mathematical model to show that the Chinese writing should have already existed no later than 2100 BCE. (2). We have adopted the “funnel model” of protein folding in biochemistry to illustrate the landscape at the beginning of Chinese writing and how it evolved into a stable writing system. (3). We have proposed an ecological model for studying the past and future of Chinese characters. Based on these models, together with systematic archaeological study of pottery inscriptions and DNA analysis of human skeletons unearthed from various neolithic cultural sites, this article discuss specific issues related to the genesis, the longevity and the future growth of Chinese characters in the context of ecological model of Chinese characters. Particularly, how Chinese characters can be prepared to respond to future challeneges in a world of globalization and dataism.