C/C++ 언어 기반 PLC를 이용한 신재생에너지 기반 계통 제어

김성현(Seonghyeon Kim),김병하(Byeongha Kim),김재한(Jaehan Kim),김환진(Hwanjin Kim),박성구(Seonggu Pak),김법수(Beopsoo Kim),홍영표(Youngpyo Hong),김도형(Dohyung Kim),김인수(Insu Kim) 대한전기학회 2023 대한전기학회 학술대회 논문집 Vol.2023 No.7

C/C++ 언어 기반 PLC를 이용한 신재생에너지 기반 계통 제어

김성현(Seonghyeon Kim),김병하(Byeongha Kim),김재한(Jaehan Kim),김환진(Hwanjin Kim),박성구(Seonggu Pak),김법수(Beopsoo Kim),홍영표(Youngpyo Hong),김도형(Dohyung Kim),김인수(Insu Kim) 대한전기학회 2023 대한전기학회 학술대회 논문집 Vol.2023 No.7

A Study on Optimizing Underground Cable Maintenance and Replacement Cycles

Kim Kwonchul,Kim Youngjae,Kim Beopsoo,Kim Insu 대한전기학회 2022 Journal of Electrical Engineering & Technology Vol.17 No.4

Entering the era of the 4th Industrial Revolution, there is a growing perception that high-quality power supply to IT devices is the starting point for a new era. It is necessary to minimize power outages because they adversely inconveniently aff ect the entire industry in an individual’s daily life. Underground cable failure is one of the leading causes of power outages. Recently, the length of underground cables has been increasing to improve the aesthetics of urban areas and secure the safety of residents, so measures are needed to prevent underground cable accidents. There is a method of collectively replacing old cables without considering the condition of individual cables. Recently, the deterioration state of cables is diagnosed through methods such as Very Low Frequency (VLF) diagnosis, and costs are reduced by selectively replacing cables. Despite the development of these diagnostic methods, no systematic management method has been proposed that considers the cost of the life cycle due to maintenance and repair of cables. Therefore, this study conducted a study to fi nd the optimized maintenance and replacement cycle of underground cables with added economic perspective. This study seeks to fi nd optimized maintenance and replacement cycles of underground cables that minimize power outages and increase the power supply reliability. The proposed study initially examined the actual failure rates of the underground cables, the costs of maintenance and repair of cables, and the costs caused by their failures. It then formulated an equation to fi nd the optimal maintenance schedules. Finally, the proposed study presents three scenarios with diff erent maintenance cycles, including the proposed optimal schedule, frequent periodic maintenance schedule, and a scenario of not performing maintenance and repairs. This study tried to calculate the maintenance and repair costs and verifi ed the optimal cable maintenance cycle via Monte Carlo simulations

[PA-0001] Metabolomic and transcriptomic analysis of mungbean (Vigna radiata) sprout under salinity stress

Insu Lim(Insu Lim),Minseo Kang(Minseo Kang),Byeong Cheol Kim(Byeong Cheol Kim),Jungmin Ha(Jungmin Ha) 한국육종학회 2022 한국육종학회 공동학술발표집 Vol.2022 No.-

A study on dose conversion from a material to human body using mesh phantom for retrospective dosimetry

Kim, Min Chae,Kim, Hyoungtaek,Han, Haegin,Lee, Jungil,Lee, Seung Kyu,Chang, Insu,Kim, Jang-Lyul,Kim, Chan Hyeong Elsevier 2019 Radiation measurements Vol.126 No.-

<P><B>Abstract</B></P> <P>In case of a radiation emergency, thermoluminescence (TL) and optically stimulated luminescence (OSL) measurements from materials in a mobile phone have been developed to enable classification of exposed individuals within a short period of time. A reconstructed dose from a mobile phone does not, however, correspond directly to a human body dose. Therefore, several studies were tried to convert a phone dose to a human body dose. Because of the difficulty in obtaining conversion factors experimentally, Monte Carlo simulations have been carried out using human phantoms for various accident situations. In recent years phantoms made of mesh have been developed to solve some problems in traditional voxel phantoms such as limited posture. In the present study, simulations using the GEANT4 computer code were performed to obtain conversion factors using mesh phantoms. The geometry of a mobile phone was designed, reflecting latest structures, and a display glass was selected as a dosimetric material due to its wide detection area with a high radiation sensitivity. Four different positions (chest, hip, thigh, and hand) of a mobile phone on the phantom were considered. In addition, six exposure conditions of anterior-posterior (AP), posterior-anterior (PA), left-lateral (LLAT), right-lateral (RLAT), isotropic (ISO), and rotational (ROT) exposure geometries and three different postures of standing, kneeling, and squatting were selected to reflect actual working situations. Three commonly used radiation sources (Iridium-192, Cesium-137, and Cobalt-60) were applied.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Simulation was conducted to convert a phone dose to human body dose using the mesh phantoms for various postures. </LI> <LI> The evaluated doses of a mobile phone were differently affected by body shielding effects. </LI> <LI> Four different positions (chest, hip, thigh, and hand) of a mobile phone on the phantom were considered. </LI> </UL> </P>

Complete Genome Sequencing and Comparative Genomic Analysis of Streptococcus thermophilus CKDB027, a Promising Probiotic Bacterial Strain

Kim Myung-Soo,Min Bonggyu,Kim Insu,Kwon Yoo Jin,Park Sung Yurb,Kim Byung-Yong,Kim Byoung Kook,박성선 건강기능식품미래포럼 2021 건강기능식품미래포럼 학술지 Vol.1 No.3

Streptococcus thermophilus is a bacterial species widely used in the food industry for producing dairy fermented foods as well as probiotics. In this study, the whole genome of the S. thermophilus CKDB027 strain used in probiotic products was sequenced, and the genetic features related to its safety and functionality were determined. The CKDB027 strain has a single circular chromosome of approximately 1.88 Mb with 39.0% GC content. The genome study has shown the absence of antibiotic resistance and virulence related genes. To identify the unique genetic features of CKDB027, genomic comparisons with other 18 S. thermophilus used in probiotic industry were conducted. The results showed that the CKDB027 strain shared a common ancestor with several strains isolated from milk or yogurt. The CKDB027 strain possesses genes related to lactose catabolism, proteolysis, stress resistance, defense system, and adherence that are major function of probiotics. In addition, a gene cluster producing exopolysaccharides was detected. These findings indicate that the S. thermophilus CKDB027 strain is genetically safe and has beneficial genetic features for human health when it is used in dairy industry as a health functional food.

Genome analysis of <i>Hibiscus syriacus</i> provides insights of polyploidization and indeterminate flowering in woody plants

Kim, Yong-Min,Kim, Seungill,Koo, Namjin,Shin, Ah-Young,Yeom, Seon-In,Seo, Eunyoung,Park, Seong-Jin,Kang, Won-Hee,Kim, Myung-Shin,Park, Jieun,Jang, Insu,Kim, Pan-Gyu,Byeon, Iksu,Kim, Min-Seo,Choi, JinH Oxford University Press 2017 DNA research Vol.24 No.1

<P><B>Abstract</B></P><P><I>Hibiscus syriacus</I> (L.) (rose of Sharon) is one of the most widespread garden shrubs in the world. We report a draft of the <I>H. syriacus</I> genome comprised of a 1.75 Gb assembly that covers 92% of the genome with only 1.7% (33 Mb) gap sequences. Predicted gene modeling detected 87,603 genes, mostly supported by deep RNA sequencing data. To define gene family distribution among relatives of <I>H. syriacus</I>, orthologous gene sets containing 164,660 genes in 21,472 clusters were identified by OrthoMCL analysis of five plant species, including <I>H. syriacus</I>, <I>Arabidopsis thaliana, Gossypium raimondii, Theobroma cacao</I> and <I>Amborella trichopoda.</I> We inferred their evolutionary relationships based on divergence times among Malvaceae plant genes and found that gene families involved in flowering regulation and disease resistance were more highly divergent and expanded in <I>H. syriacus</I> than in its close relatives, <I>G. raimondii</I> (DD) and <I>T. cacao</I>. Clustered gene families and gene collinearity analysis revealed that two recent rounds of whole-genome duplication were followed by diploidization of the <I>H. syriacus</I> genome after speciation. Copy number variation and phylogenetic divergence indicates that WGDs and subsequent diploidization led to unequal duplication and deletion of flowering-related genes in <I>H. syriacus</I> and may affect its unique floral morphology.</P>

중형 풍력터빈의 출력 및 타워 하중저감 제어기 설계

김관수(Kim Kwansu),백인수(Paek Insu),김철진(Kim Cheol-Jin),김현규(Kim Hyun-Gyu),김형길(Kim Hyoung-Gil) 한국태양에너지학회 2016 한국태양에너지학회 논문집 Vol.36 No.6

A control algorithm for a 100 kW wind turbine is designed in this study. The wind turbine is operating as a variable speed variable pitch (VSVP) status. Also, this wind turbine is a permanent magnet synchronous generator (PMSG) Type. For the medium capacity wind turbine considered in this study, it was found that the optimum tip speed ratios to achieve the maximum power coefficients varied with wind speeds. Therefore a commercial blade element momentum theory and multi-body dynamics based program was implemented to consider the variation of aerodynamic coefficients with respect to Reynolds numbers and to find out the power and thrust coefficients with respect tip speed ratio and blade pitch angles. In the end a basic power controller was designed for below rated, transition and above rated regions, and a load reduction algorithm was designed to reduce tower vibration by the nacelle motion. As a result, damage equivalent Load (DEL) of tower fore-aft has been reduced by 32%. From dynamic simulations in the commercial program, the controller was found to work properly as designed. Experimental validation of the control algorithm will be done in the future.

EVA 개질 Hybrid 콘크리트의 강도 및 수밀 특성

김인수 ( Insu Kim ),성찬용 ( Chanyong Sung ),김영익 ( Youngik Kim ),김경태 ( Kyungtae Kim ) 한국농공학회 2012 한국농공학회 학술대회초록집 Vol.2012 No.-

농업용 수리구조물, 지하구조물, 지중매설물, 해양구조물 등은 대부분 열화의 매개체인 물과 상시 접하여 있거나 오염토양, 동결융해에 노출 등 콘크리트의 성능저하에 매우 열악한 환경에 설치되므로, 이러한 구조물은 설계목표내구연한동안 그 사용성능을 최대한 발휘하기 위해서는 강도뿐만 아니라 내구성능이 뛰어난 콘크리트의 제작 및 설치가 필요하다. 따라서, 본 연구는 기존의 시멘트 등 무기재료에 고분자유기화합물인 EVA 재유화형 분말수지를 콘크리트용 혼화재로 사용하여 EVA 분말수지의 우수한 방수성, 부착성, 인성과 시멘트로 대표되는 무기재료의 강도, 내열성 등 각각의 물성을 상호 보완한 hybrid 콘크리트를 개발하였으며, EVA 분말수지의 혼입률에 따른 강도 및 수밀특성 등 기초 자료를 제공하고자 한다. EVA 재유화형 분말수지는 독일 W사에서 생산되는 제품을 사용하였으며, 보통 시멘트 콘크리트의 기본배합에 시멘트 중량비로 각각 2%, 4%, 6%, 8%를 사용하였으며, EVA 혼입 시 발생하는 과잉 공기를 제거하기 위해 폴리에테르계 분말소포제를 EVA 혼입량의 0.5%를 사용하였다. EVA 개질 hybrid 콘크리트의 압축강도는 EVA 혼입률 4%까지는 증가하다가 6%∼8%에서는 기본배합 강도인 26.9MPa와 비슷하거나 약간 상회하였으며, 압축강도 측면에서의 EVA 적정 혼입률은 4%인 것으로 나타났다. 휨강도는 압축강도와 달리 EVA 혼입율이 증가할수록 증가하였으며, 혼입률 8%에서 7.3MPa로 기본배합보다 약 15%의 강도증진이 나타났다. 한편, EVA 개질 hybrid 콘크리트의 염소이온투과저항성, 흡수율 및 내산성 시험결과 EVA 혼입율이 증가할수록 수밀성능이 우수한 것으로 나타났다. EVA 개질 hybrid 콘크리트는 동일조건의 보통 시멘트 콘크리트에 비하여 강도 및 수밀성능이 우수하여 열악한 사용환경에 노출되거나 수밀성이 요구되는 구조물 등에 적용할 경우, 콘크리트의 열화발생 요인을 저감시킬 수 있으므로 구조물의 내구성 향상을 위해 매우 유용하게 사용될 수 있을 것으로 판단된다.

Activity of Green Tea Polyphenol Epigallocatechin-3-gallate Against Ovarian Carcinoma Cell Lines

Yong Wook Kim,Su Mi Bae,Sung Eun Namkoong,Sei Jun Han,Sang Hee Kim,Yong-Wan Kim,Joon Mo Lee,Byoung Rai Lee,Young Joo Lee,Woong Shick Ahn,Insu P. Lee,Chong Kook Kim 대한암학회 2004 Cancer Research and Treatment Vol.36 No.5

Purpose: A constituent of green tea, (-)-epigallocatechin-3-gallate (EGCG), is known to possess anti-cancer properties. In this study, the time-course of the anticancer effects of EGCG on human ovarian cancer cells were investigated to provide insights into the molecular-level understanding of the growth suppression mechanism involved in EGCG-mediated apoptosis and cell cycle arrest. Materials and Methods: Three human ovarian cancer cell lines (p53 negative, SKOV-3 cells; mutant type p53, OVCAR-3 cells; and wild type p53, PA-1 cells) were used. The effect of EGCG treatment was studied via a cell count assay, cell cycle analysis, FACS, Western blot and macroarray assay. Results: EGCG exerts a significant role in suppressing ovarian cancer cell growth, showed dose dependent growth inhibitory effects in each cell line and induced apoptosis and cell cycle arrest. The cell cycle was arrested at the G1 phase by EGCG in SKOV-3 and OVCAR-3 cells.In contrast, the cell cycle was arrested in the G1/S phase in PA-1 cells. EGCG differentially regulated the expression of genes and proteins (Bax, p21, Retinoblastoma, cyclin D1, CDK4 and Bcl-XL) more than 2 fold, showing a possible gene regulatory role for EGCG. The continual expression in p21WAF1 suggests that EGCG acts in the same way with p53 proteins to facilitate apoptosis after EGCG treatment. Bax, PCNA and Bcl-X are also important in EGCG-mediated apoptosis. In contrast, CDK4 and Rb are not important in ovarian cancer cell growth inhibition. Conclusion: EGCG can inhibit ovarian cancer cell growth through the induction of apoptosis and cell cycle arrest, as well as in the regulation of cell cycle related proteins. Therefore, EGCG-mediated apoptosis could be applied to an advanced strategy in the development of a potential drug against ovarian cancer. (Cancer Res Treat. 2004;36:315-323)