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Yeong-Rok Kang,Guinyun Kim,Toshiro Ohsaki,Hyun Kim,Masayuki Igashira,이삼열,Tae-Ik Ro,Won-Chumg Chung 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.50 No.I
The neutron capture cross-sections of $^{165}$Ho were measured in the energy region from 10 to 90 keV. Pulsed keV-neutrons were produced via the $^{7}$Li(p,n)$^{7}$Be reaction by bombarding the lithium target with a 1.5-ns bunched proton beam from the 3-MV Pelletron accelerator of the Tokyo Institute of Technology. The neutron energy, having a continuous spectrum, was measured by using a time-of-flight method and a $^{6}$Li-glass scintillation detector. The gamma-rays emitted from the reaction were detected by using an anti-Compton NaI(Tl) spectrometer. A pulse-height weighting technique was applied to observe the capture gamma-ray pulse-height spectra to derive the capture yields. The neutron capture cross-sections were determined relative to the standard capture cross-sections of $^{197}$Au. The present results were compared with previous measurements and with the evaluated values of ENDF/B-VII-b2 and JEF-3.1
Kang, Hee-Woong,Jo, Yeong-Rok,Kang, Duk-Yong,Jeong, Gyeong-Suk,Jo, Hyun-Su The Korean Society of Developmental Biology 2013 발생과 생식 Vol.17 No.3
The gonadsomatic index (GSI) of mottled skate was the highest in April, GSI and HSI showed a reverse phase for its reproductive cycle. The fish had one pair of egg capsules, having 1 to 7 fertilized eggs, and spawned all the year round. When surveying the reproductive characteristics of females over 63 cm in disc width, we found the spawning peak was between April to June, and the appearance ratio of egg capsules was the highest in May (32.1%). The eggs were hatched at $8^{\circ}C$, $13^{\circ}C$, $18^{\circ}C$, water temperature (12.8 to $24.2^{\circ}C$), and the best hatching temperature was $18^{\circ}C$. The number of fish hatched was 4 to 5 fish/egg capsules, and the hatching rate was 100%. The sex ratios of hatching larvae were 45.5% female and 54.5% male. Therefore this study will provide fundamental data and information for artificial reproduction of the mottled skate.
김영준 ( Yeong Jun Kim ),이강현 ( Kang Hyun Lee ),차경철 ( Kyoung Chul Cha ),김현 ( Hyun Kim ),황성오 ( Sung Oh Hwang ),오진록 ( Jin Rok Oh ) 대한외상학회 2009 大韓外傷學會誌 Vol.22 No.1
Purpose: The purpose of this study was to analyze the characteristics and severity of wrist injuries in snowboarding. Methods: December 2005 to February 2008, Snowboarders who experienced wrist injures were included in this study. On the basis of the medical records and radiographic evaluation, the severity of distal radius fracture was classified according to the Arbeitsgemeinschaft fur Osteosynthesefragen/Association for the Study of Internal Fixation (AO/ASIF) classification. Results: Most of the injured snowboarders were a either of the beginner (35 cases, 46.1%) or the intermediate (27 cases, 35.5%) level. The most common cause of injury in snowboarding was a slip down (60 cases, 78.9%). Comminuted and articular fractures classified as AO types A3, B, and C, which required surgical reduction, made up 42.3% of the distal radial fractures in snowboarders. When we analyzed the differences in severity between the educated and the non-educated groups, an A2 type injury in the AO classification was the most common type of injury in the educated group (20 cases, 38.5%), it means less severe fractures ocurred in the educated group (p=0.045). The most frequent injury mechanism of fractures was slip down (48 cases, 63.2%), and a slip down backwards was the dominant type of slip down (36 cases, 75.0%) (p=0.031). Conclusion: Among the snowboarders in this study who suffered self-down injury to the wrist, more fractures were associated with a backwards slip down than with a forward slip down due to over extension. For educated snowboarders the severity of fracture was lower than it was for uneducated snowboarders. (J Korean Soc Traumatol 2009;22:29-36)
Hee-Woong Kang,Yeong-Rok Jo,강덕영,Gyeong-Suk Jeong,조현수 한국발생생물학회 2013 발생과 생식 Vol.17 No.3
The gonadsomatic index (GSI) of mottled skate was the highest in April, GSI and HSI showed a reverse phase for its reproductive cycle. The fish had one pair of egg capsules, having 1 to 7 fertilized eggs, and spawned all the year round. When surveying the reproductive characteristics of females over 63 ㎝ in disc width, we found the spawning peak was between April to June, and the appearance ratio of egg capsules was the highest in May (32.1%). The eggs were hatched at 8℃, 13℃, 18℃, water temperature (12.8 to 24.2℃), and the best hatching temperature was 18℃. The number of fish hatched was 4 to 5 fish/egg capsules, and the hatching rate was 100%. The sex ratios of hatching larvae were 45.5% female and 54.5% male. Therefore this study will provide fundamental data and information for artificial reproduction of the mottled skate.
임대영(Dae-Yeong Im),차현록(Hyun Rok Cha),강창석(Chang-Seog Kang) 한국지능시스템학회 2010 한국지능시스템학회 학술발표 논문집 Vol.20 No.1
본 논문은 실내환경감시를 위한 지능형센서의 개발을 제안한다. 개발된 실내환경측정용 지능형센서는 실내의 온도, 습도, 압력을 계측하여 각 가전제품이 동작 할 수 있도록 2.4㎓ 무선통신을 이용하여 가전제품을 동작할 수 있도록 하였다. 또한 센서를 설계하고 하드웨어와 소프트웨어를 개발 하였으며, 실험을 통해 실용성을 입증한 하였다.
임대영(Dae-Yeong Im),차현록(Hyun-Rok Cha),오익현(Ik-Hyun Oh),강창석(Chang Seog Kang) 한국지능시스템학회 2009 한국지능시스템학회 학술발표 논문집 Vol.19 No.2
본 논문에서는 무선통신을 이용한 밸브제어기의 개발을 제안한다. 솔레노이드밸브제어기를 위해 제어기를 설계하고, ZigBee통신을 이용하여 제어할 수 있도록 하였다. 또한 솔레노이드 밸브제어를 위해 소프트웨어를 제작하였으며 이를 기반으로 실제 하드웨어를 구성하고 제작하여 실험하였다. 실험결과 솔레노이드밸브의 제어가(ON/OFF) 원활이 수행됨을 확인하였다.
몬테칼로 시뮬레이션을 이용한 소아 핵의학검사 시 인체내부 장기선량 평가
이동연(Dong-yeon Lee),강영록(Yeong-rok Kang) 대한방사선과학회(구 대한방사선기술학회) 2021 방사선기술과학 Vol.44 No.2
In this study, a physical evaluation of internal radiation exposure in children was conducted using nuclear medicine test(Renal DTPA Dynamic Study) to simulate the distribution and effects of the radiation throughout the tracer kinetics over time. Monte Carlo simulations were performed to determine the internal medical radiation exposure during the tests and to provide basic data for medical radiation exposure management. Specifically, dose variability based on changes in the tracer kinetic was simulated over time. The internal exposure to the target organ (kidney) and other surrounding organs was then quantitatively evaluated and presented. When kidney function was normal, the dose to the target organ(kidney) was approximately 0.433 mGy/mCi, and the dose to the surrounding organs was approximately 0.138–0.266 mGy/mCi. When kidney function was abnormal, the dose to the surrounding organs was 0.228–0.419 mGy/mCi. This study achieved detailed radiation dose measurements in highly sensitive pediatric patients and enabled the prediction of radiation doses according to kidney function values. The proposed method can provide useful insights for medical radiation exposure management, which is particularly important and necessary for pediatric patients.
Kim, HyoJin,Noh, Sung Jin,Kang, Yeong-Rok,Lee, Manwoo,Jeong, Dong Hyeok,Kim, Jung Ki,Yang, Kwangmo,Ro, Tae-Ik,Shin, Sung Gyun,Kye, Yong Uk,Cho, Moo-Hyun,Kim, Guinyun Elsevier 2015 Nuclear instruments & methods in physics research. Vol.349 No.-
<P><B>Abstract</B></P> <P>The isomeric yield ratios of <SUP>133m,g</SUP>Ce and <SUP>137m,g</SUP>Ce produced from the <SUP>nat</SUP>Ce(γ,xn) reactions were determined by using the activation and the off-line γ-ray spectrometric technique with the end-point bremsstrahlung energies of 55-, 60-, and 65-MeV at 100-MeV electron linac of the Pohang accelerator laboratory. The induced activities in the irradiated foils were measured by using an energy- and efficiency-calibrated HPGe detector coupled to a PC based multi-channel analyzer. The necessary corrections were made to improve the accuracy of the experimental results. The experimental results at bremsstrahlung energies of 55-, 60-, and 65-MeV were 0.324±0.089, 0.331±0.086, and 0.403±0.089 for the <SUP>133m,g</SUP>Ce, and 0.210±0.062, 0.221±0.061, and 0.262±0.061 for the <SUP>137m,g</SUP>Ce, respectively. The present results for <SUP>nat</SUP>Ce(γ,xn)<SUP>133m,g;137m,g</SUP>Ce in this energy region were obtained for the first time which has no comparable literature data. The obtained isomeric yield ratios are compared with the calculated values based on the statistical model code TALYS 1.6.</P>