합성데크 플레이트 바닥구조의 단면환산 단순화를 통한 고유진동수 예측식의 보정에 관한 연구

임지훈,홍원기,김희철,박진영 한국강구조학회 2002 韓國鋼構造學會 論文集 Vol.14 No.4

natural frequency of a system is commonly used in evaluating the 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. The 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 aplicability of the proposed equation to other types of composite deck plate floor system was validated. 바닥구조의 진동을 평가하는데 있어 기존의 고유진동수 예측식에 의한 방법이 많이 사용되어지고 있다 . 그러나, 이러한 예측식들은 재료에 따른 구분이 없기 때문에 실제와는 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 예측식에 비해 약 14.3%의 오차율을 개선하는 새로운 예측보정식을 제안하고 , 이에 대한 일반적인 적용가능성을 검증하였다.

Myopericytoma of the Finger: A Case Report and Literature Review

임지훈,권순효,심우영,유박린 대한피부과학회 2022 Annals of Dermatology Vol.34 No.6

. 영문 초록 없음

클라우드 컴퓨팅 기반의 전자기록관리시스템 구축방안에 관한 연구

임지훈,김은총,방기영,이유진,김용 한국기록관리학회 2014 한국기록관리학회지 Vol.14 No.3

After making amendments to archive-related legislations in 2006, the Electronic Records Management Systems (ERMS) were introduced into public institutions. With this, most institutions constructed digital repositories in their records center. In this system, there are several weaknesses that wasted costs and manpower for its introduction and maintenance. The extensibility of a repository is debased, and securing the interoperability is difficult. The study proposed a cloud computing-based model to solve such problems that the previous system had. In particular, this study expected effects through the proposed model. The expected effects are low-cost, highly efficient, extensible, and interoperable in embracing various systems. Thus, the appropriateness of introducing cloud computing into ERMS was analyzed in this study. 2006년 법령이 개정된 후 공공기관에 전자기록관리시스템이 도입되어 대부분의 기관이 기록관에 디지털 저장소를 구축했다. 이 시스템은 도입과 유지에 많은 비용과 인력이 소요되고, 저장소의 확장성이 떨어지며, 상호운용성의 확보가 어려운 단점이 있다. 이에 본 연구에서는 클라우드 컴퓨팅 기술을 전자기록관리시스템에 도입하여 기존 시스템이 지닌 문제를 개선해 더 나은 시스템을 구축할 모델을 제시하였다. 특히 클라우드 컴퓨팅의 장점인 저비용·고효율, 빠른 확장성, 다양한 시스템을 하나로 포용할 수 있는 상호운용성이 공공기관의 전자기록관리시스템 운용에 적용될 때 얻게 될 기대효과를 제시해 향후 클라우드 기술의 도입의 당위성을 제기한다.

큰느타리 액체종균 생산성 향상을 위한 적정배지 선발 연구

임지훈,오민지,오연이,Raman Jegadeesh,장갑열 한국버섯학회 2020 버섯 Vol.24 No.1

팽이 육종을 위한 유전자원 특성평가 및 RAPD 마커 기반 계통분석

임지훈,오민지,오연이,Raman Jegadeesh,장갑열 한국버섯학회 2020 버섯 Vol.24 No.1

팽이 신품종 ‘백이’ 육성

임지훈,장갑열,오연이,오민지,이슬기,Jegadeesh Raman,공원식 한국버섯학회 2018 한국버섯학회지 Vol.16 No.4

Flammulina velutipes, which is a white rot fungus, is a commercially important edible mushroom and is produced in large quantities with the help of an automated and mechanized cultivation system in Korea. F. velutipes has the lowest distribution rate among domestic cultivars, estimated at about 20 percent. As most white cultivars of F. velutipes produced and exported to Korea were introduced from Japan, farmers pay large amounts of royalties. Therefore, we have developed a new, purely domestic cultivar, “Baeke,” to substitute for Japanese cultivars, which has improved storage characteristics for export. Baeke was bred by mating two monokaryotic strains isolated from ASI 4216-18 (Hansol) and ASI 4217-26 (Baekjung). Baeke showed faster mycelial growth and higher mycelial density upon incubation for seven days at 25°C on PDA media than the control variety. The mycelial growth of Baeke was even maintained at 30°C unlike the control. The lengths of pilei and stipes in Baeke harvested in the optimal stage were 11.2±0.5 mm and 125±5.4 mm, respectively, and they were 11±0.5 mm and 141.9±5.7 mm, respectively, in the control harvested in the optimal stage. The yields of Baeke (257.4±13.5 g) and control (270.7±17.8 g) per 1,100ml in bottle cultivation showed no significant difference. Overall, our results showed that Baeke was at par with foreign varieties of Flammulina velutipes in terms of quality and yield and had a uniformly shaped fruitbody, which added to its commercial value.

우리라는 말

임지훈 계간 서정시학 2020 서정시학 Vol.30 No.3

Discrete-Time Preview-Feedback H∞ Control for Selective Catalytic Reduction Systems

임지훈,Kirchen Patrick,한영덕,Nagamune Ryozo 한국자동차공학회 2021 International journal of automotive technology Vol.22 No.3

This paper proposes a discrete-time preview-feedback controller capable of reducing nitrogen oxide () emissions with affordably low ammonia () slip downstream of a catalyst for selective catalytic reduction (SCR) systems. Because of the high reduction rate, SCR systems are increasingly adopted in diesel engines. However, slow dynamics of the SCR system along with a time delay in the sensor result in a challenging control problem. To overcome the control challenges, the preview-feedback controller is proposed under the assumption that the disturbance is previewed. To design the preview-feedback controller, a discrete-time generalized plant is derived by combining the linearized model of SCR system, the model for previewing disturbance signal, and the weighting function. Based on experimentally obtained data, the simulations show that the proposed controller can effectively reduce 34 % of emissions and 6 % of slip more, compared to a non-preview controller. The robustness is then demonstrated using the uncertainties ranging from 10 to 40 %. This result shows that uncertainties of up to 30 % do not negatively affect the performance. Additionally, the result for the computational requirement shows that the proposed controller yields better performance with lower computation time than a model predictive controller does.

글로벌 비전통가스 개발 추이와 영향

임지훈,Im, Ji-Hun 대한전기협회 2013 전기저널 Vol.- No.434

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.