• Journal of the Korean GEO-environmental Society
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• v.5 no.2
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• pp.41-49
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• 2004

In this study, a newly modified soil nailing technology named as the SPN (Spiral Pipe Nailing) system, is developed to self drilling method can apply to ground which is hard to keep shape of bore hole. And limit equilibrium analysis with simplified trial wedge method while length ratio and bond ratio being altered was performed to evaluate slope stability considered of tensile strength and bending stiffness. Also, using $FLAC^{2D}$ program, superiority of the SPN system was compared to the GSN (General Soil Nailing) system about an example section. And effects of various factors related to the design of the SPN system, such as the type of drilling method and the bit, are examined throughout a series of the displacement-controlled field pull-out tests. As a result, the SPN system is better than the GSN system in slope stability because of having larger bending stiffness, tensile strength and unit skin friction. And results of simplified trial wedge method are similar to results of TALREN 97 program, commercial limit equilibrium analysis computer software, about an example section. Consequently, it will find out of that the SPN system reduce displacements and settlements in down excavation process as well as to increase the global stability.

• Transactions of the Korean hydrogen and new energy society
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• v.34 no.5
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• pp.505-513
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• 2023

Hydrogen infrastructure is expanding. High-capacity hydrogen refueling stations offer advantages because they can refuel a variety of light and heavy-duty vehicles, and multi-port refueling technology is developing to reduce charging time for heavy-duty vehicles. In this study, we suggest directions to lower the risk by analyzing the risk factors for each process involved in the installation of a high-capacity multi-port hydrogen refueling station in Changwon city. We conducted both qualitative and quantitative risk assessments of the equipment to evaluate the station. A hazard and operability study was performed for qualitative risk assessment, and PHAST/SAFETI were used for quantitative risk assessment. Quantitative risk assessment was used to calculate the consequence analysis of the facility to ensure secure design prior to station development and to predict individual and societal risks in various scenarios. As a result, the station's risk level was determined to be as low as reasonably practicable.

• The KIPS Transactions:PartB
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• v.14B no.6
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• pp.407-412
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• 2007

The performance of ultrasonic testing systems for industrial or medical purpose largely depends on the performance of ultrasonic transducers. Generally, the information about an ultrasonic transducer performance characteristics are expressed by the ultrasonic R/F signal back from a reflector and its frequency characteristics in the data sheet provided by manufacturers. In case of focused ultrasonic transducers, the two pieces of information can, however, hardly assure that the focused ultrasonic transducer would produce well-focused C-scan images. Therefore, we propose the measured size of focal spot and the reconstructed shape of effective focal zone in the focused sound field as novel measures for the performance evaluation of the focused ultrasonic transducers. The process of getting the both measures of the transducers is conducted by the implemented software including sound field scanning and virtual 3D reconstruction functions which requires the echo of a point reflector. The proposed method could, otherwise impossible in the existing method, effectively and simply distinguish superior ones among many transducers made in the same specification and be also used to detect the performance degradation due to the aging of the transducers. Eventually, the quality of performance of the ultrasonic testing systems for industrial or medical purpose is secured.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.1
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• pp.628-633
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• 2020

This paper presents an analysis of the shelf-life management program of the long-term storage one-shot system. The one-shot system is mainly maintained with long-term storage or non-operating status and is operated once at execution of the mission. The function corresponding to one-shot is mainly operated through a shelf-life item such as an explosive. The performance and characteristics of shelf-life item are subject to change as the storage period passes. Therefore, shelf-life management for maintaining good condition is very important during long-term storage, and criteria for management is necessary. We present a method for optimizing shelf-life extension by comparing criteria for management with current reliability. Next, the shelf-life evaluation schedule was decided by utilizing the reliability function of exponential distribution and Weibull distribution. Continuously accumulated test data from the shelf-life evaluation were analyzed, and the parameter of distribution was updated. The extension or expiration of shelf-life was selected by monitoring changes in reliability. In addition, we confirmed the applicability of the presented shelf-life management program by applying ASRP test data of the one-shot system K000 fuse.

• Proceedings of the Korea Water Resources Association Conference
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• 2006.05a
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• pp.259-263
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• 2006

정부주도의 연구개발 프로그램에 있어서 체계적인 평가가 필요하다는 점에 대해서는 그간 정부 및 민간에서 지속적으로 제기되어왔다. 이는 기술에 대한 중요성을 인식하면서 연구개발에 대한 민관의 절대적 자원투입은 급격하게 증가하여 온 반면, 질적인 효율성 측면에서 새로운 단계로의 도약이 필요하다는 광범위한 문제인식에 근거한 것이다. 하지만, 그간의 국내 기술평가는 크게 연구비 배정 등 경영-행정적인 목적을 가지고 행하여 온 평가와 연구개발진을 중심으로 연구대상 기술의 특성을 반영한 연구로 양분되어왔다. 즉, 평가의 항목이나 가중치 등의 선정에 있어서 기술개발 당사자와 경영자 및 평가전문가 간의 기술가치평가에 대한 격차가 크게 존재하여왔다. 1990년 이후 우리나라에서도 체계적인 기술가치평가의 필요성이 증대되면서 이에 대한 다양한 연구가 진행되었지만, 기존의 두 측면간의 격차는 크게 좁혀지지 못하고 있는 실정이다. 이는 기술가치 평가가 주로 투자용으로 치우침에 따라 경영적 측면이 강조되는 반면 기술개발자들이 중시하는 R&D 측면에서의 가치가 충분히 반영되지 못한 결과라고 할 수 있다. 따라서 많은 연구들이 본연의 가치를 충분히 입증받지 못하고, 단지 경영적인 측면에서 바라본 단편적인 이유로 사장되는 일이 발생하고 있다. 이를 막기 위해 기술적 측면과 경영적 측면이 함께 하는 학제간(interdisciplinary), 또는 기술-경제(Engineering-Economy) 가치평가 연구가 필요하다고 할 수 있다. 본 연구에서는 과학기술부의 21C 프론티어 사업 중 하나인 수자원의 지속적 확보기술개발사업단에서 개발 중인 수자원의 지속적 확보기술을 대상으로 기술가치평가 모형을 구축하였다. 수자원의 지속적 확보기술의 가치를 평가하기 위해서는 위에서 언급한 기존 기술가치 평가방법의 문제점을 해결해야 할 뿐만 아니라 추가로 공공재 및 필수재의 성격을 갖는 수자원의 특성을 반영할 수 있는 기술가치평가 모형의 구축이 요구된다. 이에 본 연구에서는 효율적인 R&D 투자 정책 수립과 정부정책수립에 기여하고자 AHP(Analytic Hierarchy Process, 계층 분석 과정)기법을 이용, 수자원의 지속적 확보기술의 특성에 따른 4개의 평가기준과 26개의 평가속성으로 이루어진 2단계 기술가치평가 모형을 구축하였으며 2개의 개별기술에 대한 시범적용을 실행하였다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.8
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• pp.2126-2133
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• 2009

As expected that a robot-industry will grow up rapidly toward a huge market, many countries try to develop the official policies to support a robot-industry. Following this trend, many robot researches are proceeded in the various technical areas by the government-initiated R&D strategies in Korea. These R&D programs are archived by academic-industrial collaboration and furthermore, include the disseminated linkage of academic-industrial collaboration and the human resource development program which pursues the problem solving and technical training for companies suffered by several technical difficulties. This paper shows the several analyses and considerations of provisional results of these collaboration programs. First, each program of specialized plan for next generation is reviewed and the accomplishment of human resource development for robot research is evaluated. Finally, several considerations are represented for continuous and desirable expansion of these programs.

• Journal of Technology Innovation
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• v.20 no.3
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• pp.229-253
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• 2012

There has been various government SME R&D programs and the increase of budget which amount to 15.8% CAGR over the last 10 years, in order to support the research and development of SMEs which accounts for over 99% of our nation's total number of companies. To investigate the factors which affect the ROI of the Government R&D project for SMEs, we conducted Tobit and Logistic regression analysis on the 1237 projects of 'Technology Innovation Program for SME' which is one of the major programs of the Korea Small and Medium Business Administration. The empirical results of this study are as follows. Application or registration of patent or certification while performing the project, positively affect the financial performance of the government R&D project. And we can also find that, according to the technology field, patent and certification have a markedly different effect on ROI of the project. The results of this study suggest that planning, evaluation, and managing of government SME R&D project should be performed with the consideration of the effect of patent and certification on the economic performance, according to the technology field of the project.

• Journal of the Korean Institute of Gas
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• v.25 no.6
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• pp.45-52
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• 2021

The government is converting the fuel for trucks, one of the causes of PM in Korea, form diesel to LNG. Mobile LNG station are being developed to solve the problems of insufficient charging infrastructure and facilitate the spread of LNG fuel. In this study, QRA was used th calculate the CA of the facility for a secure design prior to the development of the mobile LNG station and to predict the individual/societal risk the scenario. As a result, the danger of mobile LNG station was in ALARP.

• Journal of Korea Technology Innovation Society
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• v.15 no.1
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• pp.185-202
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• 2012

This study analyzed the achievement characteristics of 21st Century Frontier R&D Program depending on the subject of study, type, period in order to provide necessary data required during planning and execution of the large scale R&D projects. 21st Century Frontier R&D Program is a representative national R&D project that has been supported for a decade. The research achievements were analyzed for researchers who participated in each four projects completed in 2010 and 2011 among 16 R&D projects of 21st Century Frontier R&D Program promoted by Ministry of Education, Science and Technology. The research is summarized as follows. First, the achievements varied depending on the main agent such as universities, R&D institutions, and industries. The achievement of universities includes significantly larger publications than those of R&D institutions and industries. Second, the rate of overseas patent application and registration were higher in industries significantly than those in other research agents. Third, the achievements differed depending on research type such as basic, applied, and development researches, and the development researches exhibited significantly higher achievements in domestic patent application and registration, overseas patent application, and technology transfer. Fourth, in terms of the research period, long-term projects show significantly larger number of domestic patent applications than those from short-term projects. Fifth, when achievements like the publication and overseas patent application were classified in such fields as bio, nano, and energy environment R&D, bio and nano fields showed higher achievement than the energy environment field. This research could empirically confirm that the achievement characteristics of large scale and long-term government support R&D projects vary for each research properties.

• Journal of The Korean Association For Science Education
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• v.30 no.5
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• pp.647-667
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• 2010

The purpose of this study was to develop a brain-based analysis framework for evaluating teachinglearning program in science. To develop the framework, this study categorized educational constructs of the teachinglearning programs into one of three teaching-learning factors: cognition, motive, and emotion, using previous studies on science program. Ninety-three articles on the brain functions associated with science program were analyzed to extract brain activation regions related to the three educational constructs. After delineating the brain activation regions, we designed the brain function map, "the CORE Brain Map." Based on this brain map, we developed a brain-based analysis framework for evaluating science teaching-learning program using R & D processes. This framework consists of the brain regions, the bilateral dorsolateral prefrontal cortex, the bilateral ventrolateral prefrontal cortex, the bilateral orbitofrontal cortex, the anterior cingulate gyrus, the bilateral parietal cortex, the bilateral temporal cortex, the bilateral occipital cortex, the bilateral hippocampus, the bilateral amygdala, the bilateral nucleus accumbens, the bilateral striatum and the midbrain regions. These brain regions are associated with the aforementioned three educational factors; cognition, motivation, and emotion. The framework could be applied to the analysis and diagnosis of various teaching and learning programs in science.