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합성데크 플레이트 바닥구조의 단면환산 단순화를 통한 고유진동수 예측식의 보정에 관한 연구
임지훈,박진영,홍원기,김희철,Im, Ji Hoon,Park, Jin Young,Hong, Won Kee,Kim, Hee Cheul 한국강구조학회 2002 韓國鋼構造學會 論文集 Vol.10 No.4
The natural frequency of a system is commonly used in evaluating the serviceability condition of a floor. However. the current equations recommended in many building codes do not consider the various material types of a slab system; thus. different results are observed. Likewise. the transformation of a slab section required to predict the natural frequency of a composite deck plate is complicated. due to the varying shapes of the deck plates. Therefore. a new and simplified method of transforming a composite slab into an equivalent concrete slab is proposed. he modified vibration prediction equation was proposed based on the current vibration prediction equation recommended by LRFD. Compared to other equations. it is the closest to those obtained from experiments. The modified equation provides about 14.3% more accurate results than that recommended by LRFD. Likewise. the applicability of the proposed equation to other types of composite deck plate floor system was validated. 바닥구조의 진동을 평가하는데 있어 기존의 고유진동수 예측식에 의한 방법이 사용되어지고 있다. 그러나, 이러한 예측식들은 재료에 따른 구분이 없기 때문에 실제와느나 다른 결과를 보이게 된다. 또한, 합성데크 플레이트 슬래브의 경우, 고유진동수를 예측하기 위해 슬래브의 단면을 환산해야 하는데, 각 데크 플레이트의 특성상 그 형태가 상이함으로 인하여 많은 어려움을 느끼게 된다. 따라서, 본 논문에서는 슬래브의 단면을 환산하기 위한 새로운 단순화된 방법을 제시하였다. 그리고, 실제 측정값과 가장 오차율이 적은 "LRFD"에 제안된 고유진동수 산출식을 보정하여 기존 예측시에 비해 약 14.3%의 오차율을 개선하는 새로운 예측보정식을 제안하고, 이에 대한 일반적인 적용가능성을 검증하였다.
임지훈,이칠기,이영중,Im Ji-Hoon,Lee Chil-Gee,Lee Young-Joong 한국시뮬레이션학회 2005 한국시뮬레이션학회 논문지 Vol.14 No.4
Due to explosive expansion in R & D efforts for advancement of technological predominance by Enterprises, the volume of technical information rapidly increases and emphasize on the valuation of this information has grown ever increasingly important. Therefore the requirement for systematic management and safeguard and accumulation of these intellectual properties of the Enterprise is in very high demand. A lot of effort and research has been carried out and many on going studies in progress to try to derive the optimum solution on how to manage information retention policy, processes, execution method, and hardware to execute the information with and etc. The intent of this thesis is to recommend a way for the Enterprise on how to evaluate the valuation of the data and to suggest the method on how to manage these intellectual properties by way of using Information Lifecycle Management theory which manages data according to the business valuation of the data. The decision on valuation of data and retention cycle is based on analytic method of a nonparametric regression, experimentation was carried out by applying to Enterprise Document Management System to present the suitable retention cycle according to the valuation and variety of attribute of data.
임지훈,오민지,오연이,김민식,이윤상,Im, Ji-Hoon,Oh, Minji,Oh, Youn-Lee,Kim, Minseek,Lee, Yun-Sang 한국버섯학회 2021 한국버섯학회지 Vol.19 No.4
팽이(Flammulina velutipes)는 주름버섯목(Agaricales), 뽕나무버섯과(Physalacriaceae)에 속하는 담자균류로서, 국내 생산량은 연간 31,818톤('19)으로 전체 생산량의 약 18%이며 버섯 전체 수출액의 약 36%를 차지할 정도로 대표적인 식용버섯이다. 그러나 국내 재배되고 있는 팽이 국산품종의 비중이 31.6%(20')로 매우 낮으므로 국제 경쟁력이 우수한 국내육성 품종확보가 필요하며 수출 버섯으로서 보다 품질이 우수한 품종 육성이 필요하다. 이에 본 연구는 농진청에서 육성한 '백승'과 '우리1호'의 단핵균주를 확보하여 mon-mon교잡을 통해 '설한' 품종을 육성하였다. 균사배양 특성은 25℃에서 균사생장이 가장 좋았으며 20, 25℃에서 대조품종보다 균사 생장속도가 빨랐다. 병재배 시 배양 최적온도는 15~17℃로 배지온도가 20℃이상 되지 않게 관리해야하며 생육온도는 7~8℃로 대조품종에 비해 다소 높다. 또한 자실체 수량은 병당(850 mL) 226.5±8.0 g으로 대조품종에 비해 18.4% 증수하였으며 초발이일수가 2일 빨라 전체적인 생육기간이 단축되었다. 또한 설한의 외형은 대조품종보다 갓이 작고 대는 굵었으며 갓 색이 더 밝았다. 대치배양과 유전적 다형성 검정 결과, 설한이 다른 흰색 품종들과 유전적으로 구별되는 것을 확인하였다. Flammulina velutipes is the representative edible mushroom in Korea. It makes up around 18% of the total mushroom production and accounts for about 36% of the total mushroom export. Despite being one of the most industrially important mushroom in Korea, the distribution rate of domestic cultivar was low (~31.6%) in 2020. Therefore, we need a new domestic cultivar with high quality as the main export mushroom. We developed a new white domestic cultivar, 'Seolhan', bred by mating two monokaryotic strains isolated from Baekseung and Woori-1ho. The optimum mycelial growth temperature was 25℃ and Seolhan had higher mycelial growth than the control at 20 and 25℃. In bottle cultivation, the optimum temperature of incubation was from 15℃ to 17℃ and the growth temperature of Seolhan was 7-8℃, which was slightly higher than that of the control. The yield of Seolan was 226.5±8.0 g, an increase of 18.4% compared to the control. The period of primodia formation also was a couple of days ahead. In morphological traits, the pileus of Seolhan was smaller than that of the control, the stipe was thicker, and the color brighter. As the results of replacement culture and genetic diversity test, it was confirmed that Seolhan was genetically different from other white varieties.
간략화된 풍력발전기 모델링과 계통연계 조건에 따른 PCC 전압 변동량 계산
임지훈(Ji-Hoon Im),송승호(Seung-Ho Song) 대한전기학회 2009 전기학회논문지 Vol.58 No.12
This paper proposed a simple and helpful analysis model of voltage variation in order to predict the voltage variation at PCC (Point of Common Coupling), when a wind turbine is connected in an isolated grid. The PCC voltage flucuates when the wind turbine outputs active power to an isolated grid. This voltage variation is proportional to the product of the line impedance from the ideal generator to the PCC and the wind turbine output current. And It is different according as where wind turbine is connected. To solve the problem of voltage variation, this paper proposed the reactive power control. To verify the proposed analysis model, this paper utilized PSCAD/EMTDC Simulation and the field measurement data of the voltage variation during the wind power generation.
임지훈(Im. Jee-Hun),이명식(Lee. Myung-Sik) 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1
The purpose of this research is to make an analysis of the design tendencies of the restructuring in the contemporary architecture by dint of linking the methodology of new digital design and the characteristics of digital architecture different from the traditional buildings in a society of paradigm shift and information to an ontological turnover and to present basic orientation for generating the paradigm of digital construction.<br/> The research shows that architectural thinking by digital information is characterized by network structure and that each factor mixes with other factors due to changes in social structure and architectural changes. The researcher came to determine the following three design tendencies of contemporary architecture based in three concept: manufacturing information, intention of process, and flexibility.<br/> First, contemporary architecture is characterized by transformed tendencies with complex system, the features of fractal forms, and the embodiment of loci. Second, the tendencies of hybridization is characterized by multiple spacial cycle, successive mixtures, interaction, and hyperlink. Third, flexibility is characterized by complex non -systematic tendencies which interact with multiple network and their surroundings and network tendencies with ramified and flexible horizontal features.<br/> <br/>