헛개나무 과병 다수확 우량개체 선발

정헌관 ( Hun Gwan Chung ),심세현 ( Sea Hyun Kim ),장용석 ( Yong Seok Jang ),박형순 ( Hyung Soon Park ) 한국산림과학회 2004 한국산림과학회지 Vol.93 No.3

The objectives of this study, an analysis of the variation for bunch and fruit morphological characteristics and investigation of the characteristics for flowering and fruiting among the selected clones of Hovenia dulcis var. koreana Nakai. could be used for the conservation of gene resources and could provide information to superior trees selection. The results obtained from this study can be summarized as follows; In the fruiting characteristic analysis, total means of the Diameter of fruiting lateral(DFL), Number of total flowering lateral(NTFL), Number of fructify lateral(NFL), Rate of fructify lateral(RFL), Number of average bunch per fructify lateral(NABFL), and Number of average bunch per fruiting lateral(NABPFL) were 1.57cm, 14.5, 12.5, 82.56%, 3.23 and 39.18, respectively. Especially, the range and coefficient of variation for the NTFL and NFL, NABFL and NABPFL characteristics were 3~60(CV=57.8%) and 1~60(CV= 69.0%), 1~28(CV=56.0%) and 7.3~91.6(CV=61.2%), respectively. In the bunch and fruit morphological characteristic analysis, means of the Bunch length(BL) and Width (BW), and Weight of bunch(WB) were 33.37mm, 44.05mm and 7.38g, respectively. And, the coefficient of variation and range for the these characteristics were 8.8~130.1mm(CV=41.1%), 11.0?100.6mm (CV=30.2%), and 0.2~40.6g(CV=75.1%), respectively. In the Number of fruit per bunch(NFB) and Number of fruit petiole per bunch(NFPB) characteristic analysis, means of the NFB and NFPB were 14.24 and 2.81, respectively. In the Length and Width of fruit(LF and WF) characteristic analysis, means, range and coefficient of variation for the LF and WF were 7.48tnm, 6.1~9.6mm, 6.8% and 6.89mm, 5.7~8.6mm, 6.0%, respectively. The selection level based on major fruiting characteristics, which are the NFL over 16, NABFL over 3.1, NABPFL over 58, and WFPI and Yl over 2.9kg and 6kg, were applied on 47 sample clones, and five clones were selected(priority of 10% rank). The selection effects from selected clones in NFL, NABFL, NABPFL, WFPI and YI were evaluated as 152%, 119%, 182%, 327% and 320% compared to the mean of those 47 sample clones, respectively. Especially, GW 3-3 showed excellent values that NABPFL, WFPI and YI were 91.68, 4.7kg, and 11.26kg, respectively, suggesting a promising new superior tree for high fruit petiole productivity.

Vision Inspection Methods for Uniformity Enhancement in Long-Length 2G HTS Wire Production

Jae-Hun Lee,Byoung-Jean Mean,Tae-Jin Kim,Young-Soon Kim,Kyekun Cheon,Taehoon Kim,Dae-Gwan Park,Dae-Won Song,Ho-Kyum Kim,Woosuk Chung,Hunju Lee,Seung-Hyun Moon Institute of Electrical and Electronics Engineers 2014 IEEE transactions on applied superconductivity Vol.24 No.5

<P>With much effort devoted by many research groups, the performance of 2nd generation (2G) superconducting wires, also called coated conductors (CC), was drastically improved, leading to many meaningful and impressive demonstrations of electric power devices. Now that the performances such as critical current, in-field characteristics, and mechanical strengths became sufficient to the application, the attention has moved to how we can produce long 2G wires with high uniformity. Many in-line inspection tools are tested and introduced to address these challenges. In this paper, we describe two methods that we adopted for in-line monitoring and feedback control of layer deposition. One is for texture control of ion beam assisted deposition (IBAD) of an MgO layer through reflection high-energy electron diffraction (RHEED) pattern monitoring and analysis. The other is for composition control of a superconducting layer through surface color observation and control of metal source evaporation rates. By applying the above two methods, we achieved in-plane texture of about 4.8 ° in the MgO layer, as measured by FWHM of phi-scan of (220) peak, and the critical current of 750 A/12 mm width in the GdBCO layer along the length of more than 650 m, with excellent uniformity.</P>

Chracteristics of Fine Copper Powder by Pulse Applied Electrodeposition

Ahn Jong-Gwan,Kim Dong-Jin,Hai Hoang T.,Lee Jae-Ryeong,Chung Hun-Saeng,Kim Joong-Oh 한국분말야금학회 2004 한국분말야금학회 학술대회논문집 Vol.2004 No.1

SAR를 이용한 토양수분 및 수문인자 산출 연구동향

정지훈 ( Jee-hun Chung ),이용관 ( Yong-gwan Lee ),김성준 ( Seong-joon Kim ) 한국지리정보학회 2020 한국지리정보학회지 Vol.23 No.3

영상레이더(Synthetic Aperture Radar, SAR)는 기상조건이나 주야, 일조에 상관없이 지표면을 촬영할 수 있고, 토양수분이나 지하수 등 수문인자의 탐색이 가능하여 수자원 분야에서 그 중요성이 점차 두드러지고 있다. SAR는 1970년대부터 인공위성에 탑재되기 시작하여 2020년 현재 15기 이상의 SAR 위성이 운용되고 있고 향후 5년 내에도 10기 내외의 위성이 발사될 예정이다. 최근에는 관측 폭 및 해상도 증진, 다중 편파 및 다중주파수, 관측 각도의 다양화 등 다양한 형태의 SAR 기술들이 개발 및 활용 중이다. 이에 본 고에서는 SAR 시스템의 간략한 역사와 더불어 토양수분 및 수문인자 산출과 관련된 연구동향을 조사하였다. 현재까지 SAR 위성을 활용하여 산출 가능한 수문인자는 토양수분, 해저지하수유출, 강수, 적설분포면적, 식생지수 등이 있으며, 그중 토양수분은 물리적 모델인 IEM(Integral Equation Model)과 인공지능 기반의 ANN(Artificial Neural Network)을 대표적으로 활용하여 우리나라를 포함한 북미, 유럽, 인도 등 총 17개국에서 연구가 진행되고 있다. 위성 탑재체는 RADARSAT-1, ENVISAT ASAR, 그리고 ERS-1/2가 가장 많이 사용되었으나 현재는 운영이 종료되었으며, 현재 운영 중인 RADARSAT-2, Sentinel-1, SMAP 등의 활용도 점차 늘어나고 있는 것으로 나타났다. 우리나라는 2025년 발사를 목표로 C-band SAR를 탑재한 수자원·수재해 중형위성을 개발 중이므로, SAR를 이용한 다양한 수문인자 산출 연구가 활성화될 것으로 예상된다. Synthetic Aperture Radar(SAR) is able to photograph the earth’s surface regardless of weather conditions, day and night. Because of its possibility to search for hydrological factors such as soil moisture and groundwater, and its importance is gradually increasing in the field of water resources. SAR began to be mounted on satellites in the 1970s, and about 15 or more satellites were launched as of 2020, which around 10 satellites will be launched within the next 5 years. Recently, various types of SAR technologies such as enhancement of observation width and resolution, multiple polarization and multiple frequencies, and diversification of observation angles were being developed and utilized. In this paper, a brief history of the SAR system, as well as studies for estimating soil moisture and hydrological components were investigated. Up to now hydrological components that can be estimated using SAR satellites include soil moisture, subsurface groundwater discharge, precipitation, snow cover area, leaf area index(LAI), and normalized difference vegetation index(NDVI) and among them, soil moisture is being studied in 17 countries in South Korea, North America, Europe, and India by using the physical model, the IEM(Integral Equation Model) and the artificial intelligence-based ANN(Artificial Neural Network). RADARSAT-1, ENVISAT, ASAR, and ERS-1/2 were the most widely used satellite, but the operation has ended, and utilization of RADARSAT-2, Sentinel-1, and SMAP, which are currently in operation, is gradually increasing. Since Korea is developing a medium-sized satellite for water resources and water disasters equipped with C-band SAR with the goal of launching in 2025, various hydrological components estimation researches using SAR are expected to be active.

증례보고 : 미숙아에서의 척추마취와 미추마취의 병행

정진헌 ( Jin Hun Chung ),김성훈 ( Sung Hoon Kim ),전대근 ( Dae Geun Jeon ),이관우 ( Gwan Woo Lee ) 대한마취과학회 2006 Korean Journal of Anesthesiology Vol.51 No.6

Spinal anesthesia in preterm infants offers a safe alternative to general anesthesia, especially if general anesthesia is not preferred because of coexisting diseases, such as bronchopulmonary dysplasia and recurring of apnea. But the single-shot technique of spinal anesthesia has some limitations because the duration of surgical anesthesia is approximately 60 min. Since some procedures may require more time, alternative regional techniques which provide more prolonged surgical anesthesia are needed. We present our experience with a combined spinal caudal anesthesia in a preterm infant. (Korean J Anesthesiol 2006; 51: 764~7)

Case Reports : A Case of Septic Shock and Disseminated Intravascular Coagulation Complicated by Acute Myocardial Infarction Following Amniocentesis

김계훈 Kye Hun Kim,Myung Ho Jeong,Ik Joo Chung,Jeong Gwan Cho,Tae Bok Song,Jong Chun Park,Jung Chaee Kang 대한내과학회 2005 The Korean Journal of Internal Medicine Vol.20 No.4

Maternal septic shock and disseminated intravascular coagulation (DIC) following amniocentesis is a relatively rare condition, and its incidence is only 0.03~0.19%. Acute myocardial infarction (AMI) associated with DIC is also rare. We report here on a 40

한국 여수에서 채집된 매가오리과 (Myliobatidae) 어류 첫기록종, Mobula thurstoni

명세훈 ( Se Hun Myoung ),송영선 ( Young Sun Song ),강충배 ( Chung-bae Kang ),최홍인 ( Hong-in Choi ),김종관 ( Jong-gwan Kim ),윤문근 ( Moongeun Yoon ),임재복 ( Jaebok Im ),한동진 ( Dong-jin Han ) 한국어류학회 2021 韓國魚類學會誌 Vol.33 No.2

매가오리목 매가오리과에 속하는 Mobula thurstoni 2개체 (1770~1850mm 체반폭)가 2018년 9월 전라 남도 여수시 연도 연안에서 정치망으로 채집되었다. 이 종은 가슴지느러미의 앞부분이 이중 굴곡이고, 등지느러미 바로 뒤 꼬리 시작부분에 가시가 없으며, 등지느러미 끝부분에는 흰색이고, 그리고 등쪽의 체색이 어두운 남색을 띤다. Mobula kuhlii와 가장 형태적으로 유사하였지만, 가슴지느러미 앞부분에 이중 굴곡을 가지고 있다는 점 (vs. 직선이거나 약간의 굴곡을 가진다)과 등쪽 체색이 어두운 남색을 띤다는 점 (vs. 회갈색)에서 잘 구분된다. 또한, 이종은 M. kuhlii와 미토콘드리아 16S rRNA 영역에서 유전적 거리 0.030~0.069의 차이를 보여 구분되었다. 이 종의 새로운 국명으로 ‘매끈꼬리쥐가오리’를 제안한다. Two specimens (1770~1850 mm disc width) of Mobula thurstoni, belonging to the family Myliobatidae, order Myliobatiformes, were first collected from the central coast of the Southern Sea of Korea in September 2018. This species is characterized by an anterior margin of disc with double curvature, a white-tipped dorsal fin, and the absence of a caudal spine. This species is morphologically similar to Mobula kuhlii, but has an anterior margin of pectoral fins with a double curvature and the dorsal coloration is bluish black rather than white. In addition, M. thurstoni was well distinguished from M. kuhlii as determined by mitochondrial DNA 16S rRNA sequences with genetic distances ranging from 0.030 to 0.069. The Korean name ‘Mae-kkeun-kko-li-jwi-ga-o-li’ is proposed for the species M. thurstoni.

Radiated Noise Prediction of Gearbox Housing for Electronic Forklift

( Woo-jin Chung ),( Gwan-hee Son ),( Young-jun Park ),( Ki-hun Lee ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1

As engine-driven forklifts that used in indoor production plants or logistics warehouses generate 90 dB(A) level of noise, the issue of noise becomes more important in the forklifts. In addition, due to the problem of exhaust gas of engine-driven forklifts, the demand for electronic forklifts is continuously increasing. An electric forklift is constituted of a hydraulic operation part for lifting and lowering a load, electric power source for moving a vehicle and carrying a load, and a driving part including a driving axle and a steering axle. Since the drive axle is the main noise source of the electronic forklift, development of a drive axle to which a noise reduction technique for improving user’s convenience is applied is required in recent. The main types of the counterbalance forklift’s drive axle are a single-motor-in-line type drive axle and a dual-motor type drive axle. The single-motor-in-line type drive axle is a structure capable of steering and splitting power by applying differential gears. The single-motor-in-line type drive axle has the motor shaft and the output shaft that are parallel. It is composed of a multi-stage cylindrical gear train and a planetary gear train in order to output a high torque required in the operation of the electric forklift. The drive axle is driven by gears, and the bearing is coupled to the housing to support the rotating bodies. This means that the mechanical component parts transmit power by friction and rolling motion. That is, the vibration generated in the gear is excited by the bearing and causes the vibration of the housing, so that the structure born noise is generated in the housing. In this study, we modeled a single-motor-in-line type drive axle using a commercial software. We simulated the developed model on the operating range of the drive axle to predict the radiation noise of housing. In the future research, it is aimed to reduce the housing radiation noise by improving the housing based on the radiated noise result of the housing predicted through the simulation.

A New High Productivity Rubus coreanus Miq. Cultivar, "Jung-Keum 1"

Sea Hyun Kim,Hun Gwan Chung,Jing Yu Han 한국육종학회 2007 한국육종학회지 Vol.39 No.2

A clone bank that contained highly productive and superior genotypes of R. coreanus Miq. was assembled in 1998. The clone bank was composed of a collection of 227 clones from 15 regions in Korea. From the clone bank, 198 clones that regularly completed flowering and fruiting were used as official materials for superior tree breeding. To evaluate the flowering and fruiting, the length of the fruiting lateral (LF), the number of flowers per fruiting lateral (NFL) and the number of fruit per fruiting lateral (NFFL) were investigated. Fruits were harvested when they fully ripen and the fruit length (FL), fruit width (FW), the weight of fruit (WF) and soluble solids were measured. In 2001, 17 of the original 227 clones were identified as being the most superior, and these selected genotypes were tested for regional adaptability in four different regions in 2002. Finally, these advanced selections including “Jung-Keum 1” were evaluated for flowering, fruiting and fruit production characteristics from 2002 to 2005. The new cultivar, “Jung-Keum 1” has dark red fruit color and larger fruit size than the contrast clone that was shown mean value for the most characteristics. Selection effect of the new cultivar were shown 130.8% (NFL), 128.3% (NFFL), 123.6% (WF) and 173.3% (yield/individual; YI) superior in comparison with the contrast clone, respectively.

유지 투석중인 만성 신부전환자에서 허혈성 심질환의진단 지표로서의 심장트로닌-I의 유용성

신병철,강대웅,정지용,류봉관,서영욱,김정인,김범윤,김현리,정종훈 朝鮮大學校 附設 醫學硏究所 2004 The Medical Journal of Chosun University Vol.29 No.1

Background : Coronary disease is highly prevalent in patient with end stage renal disease (ESRD) and account for much of their observed morbidity and mortality. Troponin-I consistently maintains a high sensitivity and specificity and is most sensitive marker for ischemic heart disease (IHD). Method : We examed 49 hernodialyzed patients (22 male, 27 female) without evidence of acute coronary syndrome (ACS) for 6 months. Biochemical markers were measured in serial predialysis blood samples. For analysis, we used two cardio-specific assays for troponin-T (cTnT) as well as for troponin-I (cTnI) and compared the results with CK-MB (reference value ≤ 4.0 ng/mL) concentration. Results : Myocardial ischemia was observed in 47% (23/49) of patients. cTnT level above 0.1 ng/mL. and cTnI level above 0.5 ng/mL, were observed in 22% (11/49) and 20% (10/49) of patients respectively. cTnI revealed significantly higher positive rate in patients with myocardial ischemia than the patients without myocardial ischemia (43 % vs 30%) (p<0.05). cTnT and CK-MB revealed no difference in positive rate between the patients with and without myocardial ischemia (cTnT : 30% vs 15% and CK-MB : 30% vs 19%). The sensitivity and specificity of cTnI to myocardial ischemia were higher than those of cTnT and CK-MB (sensitivity 43% vs 30% and 30%. specificity 100% vs 85% and 81%). Conclusion: Both cTnT and cTnI are useful in ruling out myocardial injury in chronic renal failure patients. But. cTnI is a more sensitivity and excellent specificity of ischemic heart disease than cTnT and CK-MB in hemodialyzed patients. In patients with ischemic heart disease, the presences of DM and advanced age were higher than those in patients without ischemic heart disease (p<0.05). Among the baseline characteristics old age, elevated LDH and diabeties were significant more frequent in the patients with elevation of cardiac troponin-I (p>0.5 ng/mL) than those with cardiac troponin-I (p<0.5 ng/mL), p=0.038, p=0.049, and p=0.045, respectively. Our results suggest that these cTnI is the potential diagnostic marker for the prediction of IHD in ESRD patients.