• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2007년도 정기 학술대회 논문집
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• pp.346-351
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• 2007

As the construction technology is rapidly advancing internationally, the necessity of virtual construction technology development is drastically demanded in the construction industry together with a fusion technology with information technology(IT). The construction technology will be changed as the paradigm of construction technology in the future. The establishment of building structural system in the virtual construction basis is necessary for the integration of construction process, and it will be expected to produce the effect of reduction of construction period and quality improvement through the environment of integration. This study is to present the analysis of the existing process of structural design, the content of research & development as per the building structural system on virtual construction basis and the direction of research.

• Structural Monitoring and Maintenance
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• 제4권4호
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• pp.351-364
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• 2017

In this study effects of various parameters like a number of bays, the stiffness of the structure along with the height of the structure was examined. The fundamental period of vibration T of the building is an important parameter for evaluation of seismic base shear. Empirical equations which are given in the Indian seismic code for the calculation of the fundamental period of a framed structure, primarily as a function of height, and do not consider the effect of number of bays and stiffness of the structure. Building periods predicted by these expressions are widely used in practice, although it has been observed that there is scope for further improvement in these equations since the height alone is inadequate to explain the period variability. The aim of this study is to find the effects of a number of bays in both the directions, the stiffness of the structure and propose a new period equation which incorporates a number of bays, plan area, stiffness along with the height of the structure.

• 로봇학회논문지
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• 제18권4호
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• pp.472-480
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• 2023

This paper describes the development of a test-equipment for the pre-verification of navigation performance in cluster-based AUVs (Autonomous Underwater Vehicle). In the development of an AUV, conducting hardware and software development sequentially is not efficient due to the limited research and development period. Therefore, in order to reduce the overall development time and achieve successful development results, it is essential to pre-validate the navigation system and navigation algorithms. Accordingly, this paper explains the test-equipment for pre-verification of navigation performance, and ultimately confirms the stability of the navigation system and the performance of the navigation algorithms through the analysis of five types of navigation sensor data stored during real-sea experiments. The results demonstrate that through the development and verification of the test-equipment, it is possible to shorten the overall development period and improvement of product quality in the process of developing multiple AUVs.

• 한국식품과학회지
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• 제24권2호
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• pp.142-148
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• 1992

95종의 식용 혹은 약용식물로부터 에탄올과 물을 용매로 하여 얻은 126종의 추출물을 괌유, 돈지 및 대두유에 첨가하여 Rancimat으로 항산화 효과를 비교하였다. 항산화 효과가 인정되면서 추출 수율이 높은 민들레, 질경이, 붉나무, 택란엽, 황기, 포공영 등 6종을 1차 선발하여 각 추출물을 농도별로 실험한 결과 붉나무 추출물이 팜유 및 돈지의 유도기간을 연장시키는데 우수한 효과를 보였다. 붉나무 추출물을 팜유에 600ppm 첨가시 AI(Antioxidant index, 각 항산화제 첨가구의 유도기간을 무첨가구의 유도기간으로 나눈 값)는 1.35였고, 돈지에서는 AI가 3.03으로 돈지에 효과가 우수하였다.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 1999년도 추계학술대회 논문집 - 한국공작기계학회
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• pp.81-86
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• 1999

Nowadays, as the development period of new products becomes shorter and consumer's requirement is more various, the importance of Rapid Protytyping Technology has been rapidly increased. Rapid Protytyping makes protytypes or functional parts directly using the 3D CAD data. But RP machines can make protytype in limit size. But RP machines can make protytype in limit size. For making large size protytype, we slice solid, which is made of STL file, and then glue sliced solid. This paper is concerned with slicing solid on STL file.

• KDI Journal of Economic Policy
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• 제37권3호
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• pp.75-106
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• 2015

The primary goal of this paper is to explore the microeconomic foundation of Korean firms' adoption of foreign technologies. The paper also reviews the overall trend of international technology transfers to Korea. The period covered in this paper is Korea's high growth era, from the 1960s to the 1990s. The works of this paper center on the two questions of what characterizes foreign technologies which had been imported through licensing contracts, and which driving forces expedite technology adoption by firms. The Korean experience provides the context of success in the catch-up growth. The co-movement of technology imports with capital goods imports manifests Korea's effort to improve the technical efficiency toward the world frontier. Underlying this trend are firms' decisions to adopt new technologies. The paper shows that firms respond proactively to wage increases by adopting newer technologies and thus, in turn, increasing employment, which implies the existence of a virtuous interactive mechanism among these factors.

• 대한원격탐사학회지
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• 제2권1호
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• pp.35-47
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• 1986

The progress in computer technology has significantly improved the capabilities of the microcomputer image processing systems and brought down their hardware costs. This on-going trend of technological development seems to bring further substantive improvements in microcomputer image processing and decreasing hardware costs. The technical development in microcomputer image processing system including VLSI technology, semiconductor memory, disk and tape storage, and image display subsystems have been reviewed and their future trend have been projected. The impact of this technology to the development of image processing has been assessed in the time period of immediate future (2-3 years) and near future (5 years).

• 한국기술혁신학회:학술대회논문집
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• 한국기술혁신학회 2005년도 춘계학술대회
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• pp.217-233
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• 2005

As the Kyoto Protocol will come into effect starting February 2005, 55 member countries of the Conference of Parties of the Framework Convention on Climate Change (FCCC) will be under obligation to reduce the emissions of Carbon Dioxide $(CO_2)$ by 5.2 Percent from the 1990 levels before the year 2012. Hence the development of technology to prepare for this has been accelerated in Korea. The effect of technology varies with market size of technology, and it is necessary to control technology development period, according to the size and trend of technology market. Moreover it is essential that market analysis be finished before technology development, because market on the $(CO_2)$ Reduction and Sequestration Technology expands internationally. For that reason, it is needed to analyze domestic market and to consider technology development strategy according to analysis results. In this paper, we analyzed the domestic industry and forecasted the market size, both related to the Reduction and Sequestration Technology on $(CO_2)$ emission, which is the major component of global Green House Gas(GHG).

• Animal Bioscience
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• 제36권6호
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• pp.891-898
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• 2023

Objective: This study aimed to determine the effect of crude oligosaccharide extract from coconut milk meal (CMM) and spent tea leaves (ST) on the performance and gut development of broiler chickens. Methods: A total of 240 one-day-old unsexed broiler chicks (ROSS 308) were raised on litter-floored pens and had ad libitum access to water for 42 days. The experiment was conducted on chicks fed with basal diet (CON), commercial mannan-oligosaccharides (MOS), crude oligosaccharide extract from CMM, and crude oligosaccharide extract from ST. The experimental diets were supplemented with 2 and 1 g/kg oligosaccharides during the starter and grower periods, respectively. Results: The body weight gain (BWG) of birds in the MOS group was higher than that of birds in the other groups (p<0.05) in the starter period. However, during the grower period, ST significantly improved the BWG compared to the MOS (p<0.05). MOS, CMM, and ST showed no influence on the carcass and visceral organ weight and the weight and length of intestine (p>0.05). The digestibility of gross energy was greater (p<0.05) in the CMM group than in the CON group during the grower period. Morphological changes were absent in the dietary treatments (p>0.05). Conclusion: The improvements in the growth performance were partly driven by nutrient digestibility of such oligosaccharides having prebiotic properties. This result can indicate that supplementing broiler diets with crude oligosaccharides from CMM and ST had no negative effect on the growth performance and gut development of broilers.

• 원예과학기술지
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• 제31권6호
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• pp.687-699
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• 2013

This study was conducted to examine the effect of grafted peppers (Capsicum annuum) on different rootstocks on fruit quality. Three pepper cultivars, 'Nokkwang', 'Saengsaeng Matkkwari', and 'Shinhong' were grafted onto five commercial rootstocks that are known to be resistant to Phytophtora blight. Non-grafted or auto-grafted peppers were used as controls. Grafted plants were grown during two consecutive harvest periods by semi-forcing culture (April to August) and retarding culture (September to March the subsequent year). Full size green fruits were harvested and weighed weekly from June to August (Semi-forcing culture) and from December to March of the subsequent year (Retarding culture). The fruit size, weight, flesh thickness, and firmness were measured every month. Total marketable yield was not significantly influenced by either auto-graft of 'Nokkwang', 'Saengsaeng Matkkwari', and 'Shinhong' of pepper or grafted with the five commercial rootsctocks. By contrast, grafting influenced the apparent fruit quality of peppers. Fruit characteristics differed depending on the rootstock cultivars. However, the fruit characteristics of rootstock did not affect the fruit characteristics of scion grafted onto that rootstock. Fruit characteristics in each treatment differed among harvest time (first, second, and third harvest). Fruit quality parameters were also different as affected by the harvest period. In conclusion, apparent quality and textural property of pepper fruits were influenced by not only grafting with different rootstocks but also by the harvest period and harvest time. Accordingly, rootstock/scion combination, the scion variety and the harvest period must be carefully chosen to get the desired optimal fruit quality.