다공질 장석으로 제조한 축열층의 열전도 특성

김성욱,고대홍,최은경,김성환,김태형,이규환,조진우,Kim, Sung-Wook,Go, Daehong,Choi, Eun-Kyeong,Kim, Sung-Hwan,Kim, Tae-Hyoung,Lee, Kyu-Hwan,Cho, Jinwoo 대한자원환경지질학회 2017 자원환경지질 Vol.50 No.2

다공성 구조의 장석과 주택 시방기준으로 제작된 바닥 축열층 모르타르의 열적 특성과 소비전력을 비교하였다. 실험을 위해 온수관이 설치된 2개의 실대형 모형을 제작하였다. 자외선 열화상 온도와 온도센서를 이용하여 가열과 냉각과정에서 축열층의 온도변화를 모니터링하였다. 시험동의 축열층은 $20-30^{\circ}C$ 구간의 온도 범위의 가열조건에서 $2-3.5^{\circ}C$ 높은 온도를 보였고 목표 온도에 도달하는 시간이 단축되었다. 온수관에서 멀어질수록 $4-4.8^{\circ}C$ 이상의 차이를 보였고 이는 장석 기반의 모르타르 축열층이 열적 평형에 빨리 도달하는 것을 지시한다. 가열 온도 $30^{\circ}C$를 기준으로 산정한 소비전력은 2.2배 차이를 보였고 단계별 온도 상승에서 소비전력은 66% 절감되었다. 냉각에서 시험동의 표면온도는 지속해서 $2^{\circ}C$ 이상 높았고 축열로 인해 보일러의 재가동 시간이 연장되는 것을 고려하면 에너지 효율은 더 증가할 것이다.

요추부 수술후 발생한 요실금(尿失禁) 환자의 증례

김성욱,김태희,정성엽,조윤철,김철수,임세영,Kim, Sung-Wook,Kim, Tae-Hui,Jung, Sung-Yub,Cho, Yoon-Chul,Kim, Chul-Soo,Lim, Se-Young 대한약침학회 2003 Journal of pharmacopuncture Vol.6 No.2

Objective : The purpose of this study is to show that there was a significant result in prescribing Herb remedy and Korean-Bee-Venom acupuncture and acupuncture & moxibustion therapy to Urinary incontinence patients due to Neurologic Bladder caused by Cauda equina syndrome after having an vertebrae lumbale operation. Method : The methods used in this study was observe the patient's subjective improvement, valuation of the bladder function and the change of the sensibility drop when Herb remedy and Korean-Bee-Venom acupuncture and acupuncture was applied. Results : When acupuncture and Korean-Bee-Venom acupuncture was both applied the function of Bladder changed from score 10 to 0 and the Grade of Urinary Incontinence changed from Grade III to 0 also with the sensibility drop. Conclusion : The results show that when using Umnungchon(SP9), Yangnungchon (GB34), Taedon(LR1), Kokkol(CV2) there was an effect to some degree to the Urinary incontinence patients but when Korean-Bee-Venom was acupunctured to Kwanwon(CV4) and Kihae(CV6) the effect increased. Further studies and examples for evidence are required.

기계적 합금화된 Ni-36at.%Al 합금의 상변태에 미치는 결정립 크기 및 냉각속도의 영향

김성욱,김대건,김지순,안인섭,김영도,Kim, Seong-Uk,Kim, Dae-Geon,Kim, Ji-Sun,An, In-Seop,Kim, Yeong-Do 한국재료학회 2000 한국재료학회지 Vol.10 No.9

Nanocrystalline NiAl alloy containing 36at.%Al was synthesized by mechanical alloying (MA). Synthesized powder was sintered by a pulse electric current sintering (PECS) facility. Effecting parameters on the phase transformation were discussed in terms of cooling rate and time spent on heat treatment. The behavior of phase transformation for sintered parts was examined by differential scanning calorimetry (DSC) and X-ray diffraction (XRD) method. Microstructure was observed by scanning electron microscopy (SEM). Martensitic lattice parameter and volume fraction was calculated by direct comparison method in X-ray diffraction analysis.

고해상 지형정보와 토양수분을 활용한 다짐도 평가

김성욱,고대홍,이영재,최은경,김진영,김지선,조진우,Kim, Sung-Wook,Go, Daehong,Lee, Yeong-Jae,Choi, Eun-Kyeong,Kim, Jin-Young,Kim, Ji-Sun,Cho, Jin-Woo 한국환경과학회 2022 한국환경과학회지 Vol.31 No.10

In this study, a field study was conducted to investigate the relationship between high-resolution remote images and the volumetric moisture, and the number of compaction. Changes in the shape of the surface and soil moisture content were observed and correlated with the number of compactions using roller equipment. As the compaction is repeated, the surface is flattened and the terrain curvature decreases and converges to zero. In particular, the tangential curvature changes as the number of compactions increase. Due to soil compaction, the vegetation index changed from a positive to a negative value, and most of the test site area was homogenized with a negative index. This suggests a decrease in porosity and an increase in volumetric water content associated with increasing soil compaction. Soil moisture, measured using a frequency domain reflectometry(FDR) sensor, tends to increase proportionately with the number of vibration compactions, but the correlation between the number of compactions and soil moisture is unclear. This study suggests that while it is necessary to consider the reproducibility of the experiments performed, the compaction quality of the soil can be evaluated using high-resolution terrain factors and soil moisture.

국방형상관리정보체계의 상호운용성 수준에 관한 연구

김성욱,김용진,왕영진,김석곤,이인현,이기서,Kim, Sung-Ouk,Kim, Yong-Jin,Wang, Young-Jin,Kim, Seok-Gon,Lee, In-Hyun,Lee, Key-Seo 한국전자통신학회 2011 한국전자통신학회 논문지 Vol.6 No.2

The level of information system interoperability of DPMS(Defense Procurement Management System) and DCMIS(defense weapon system configuration management information system) was measured. Two information systems interoperability is analyzed using measured results and the level of interoperability were estimated. The results was directed to the future improvement project of information system.

알루미늄 합금의 전자빔용접에서 용입 깊이에 미치는 합금원소의 영향

김성욱,김숙환,Kim, Sung-Wook,Kim, Sook-Hwan 대한용접접합학회 2008 대한용접·접합학회지 Vol.26 No.5

대상포진 치험 증례 임상보고

김성욱,Kim, Seong-Wook 대한약침학회 2001 Journal of pharmacopuncture Vol.4 No.2

Objective : These case study were made to evaluate and observe the treatment for the Herpes-Zoster through the korean oriental medicine. Method : Clinical observation and analysis about 4 cases of Herpes-zoster including the Ramsay's-hunt syndrome had been done the patients of the Sang-Ji Oriental Medicine Hospital. These cases were mainly treated with oriental medicine using the Herb medication, Korean Bee-Venom therapy, Acupuncture and Electro-acupuncture therapy. Acupuncture technic was mainly used Sa-Am acupuncture(Four needle technique). Result : After treatment, all of cases were completely cured without any complication. Conclusion : Based on the clinical results, Korean Oriental Medicine is believed to be effective for treating Herpes-zoster, and further studies should be conducted to provide more valuable information.

층류박리 후향계단 유동의 이중주파수 가진

김성욱,최해천,유정열,Kim, Sung-Wook,Choi, Hae-Cheon,Yoo, Jung-Yul 대한기계학회 2003 大韓機械學會論文集B Vol.27 No.8

The effect of local forcing on the separated flow over a backward-facing step is investigated through hot-wire measurements and flow visualization with multi-smoke wires. The boundary layer upstream of the separation point is laminar and the Reynolds number based on the free stream velocity and the step height is 13800. The local forcing is given from a slit located at the step edge and the forcing signal is always defined when the wind tunnel is in operation. In case of single frequency forcing, the streamwise velocity and the reattachment length are measured under forcing with various forcing frequencies. For the range of 0.010〈S $t_{\theta}$〈0.013, the forcing frequency component of the streamwise velocity fluctuation grows exponentially and is saturated at x/h = 0.75 , while its subharmonic component grows following the fundamental and is saturated at x/h = 2.0. However, the saturated value of the subharmonic is much lower than that of the fundamental. It is observed that the vortex formation is inhibited by the forcing at S $t_{\theta}$ = 0.019 . For double frequency forcing, natural instability frequency is adopted as a fundamental frequency and its subharmonic is superposed on it. The fundamental frequency component of the streamwise velocity grows exponentially and is saturated at 0.5 < x/h < 0.75, while its subharmonic component grows following the fundamental and is saturated at x/h= 1.5 . Furthermore, the saturated value of the subharmonic component is much higher than that for the single frequency forcing and is nearly the same or higher than that of the fundamental. It is observed that the subharmonic component does not grow for the narrow range of the initial phase difference. This means that there is a range of the initial phase difference where the vortex parring cannot be enhanced or amplified by double frequency forcing. In addition, this effect of the initial phase difference on the development of the shear layer and the distribution of the reattachment length shows a similar trend. From these observations, it can be inferred that the development of the shear layer and the reattachment length are closely related to the vortex paring.

TiN Anode for Electrolytic Reduction of UO₂ in Pyroprocessing

김성욱,최은영,박우신,임현숙,허진목,Kim, Sung-Wook,Choi, Eun-Young,Park, Wooshin,Im, Hun Suk,Hur, Jin-Mok The Korean Radioactive Waste Society 2015 방사성폐기물학회지 Vol.13 No.3

파이로프로세싱 전해환원 공정에서 현재 사용 중인 Pt 양극을 대체하기 위한 소재 개발은 매우 중요하다. 이 연구에서는 전기화학 반응시 산소를 발생시키는 전도성 세라믹 양극으로서 TiN의 전기화학적 거동을 알아보았다. UO₂의 전해환원이 일어나는 동안 TiN 양극의 적합성과 안정성에 대한 평가를 진행하였다. LiCl-Li₂O 용융염에서 TiN 양극을 이용하여 UO₂를 전기화학적으로 금속 U로 변환시킬 수 있었다. 반응 도중 TiN의 산화 반응은 관찰되지 않았다. 하지만 TiN 내부에서 공공이 생기는 것을 확인하였으며, 이에 따라 소재 수명에 제한이 있을 것으로 판단된다.

황련 황금 황백이 백서의 GASTRIN 및 UROPEPSIN 분비에 미치는 영향

김성욱,김병우,Kim, Sung-Wook,Kim, Byoung-Woo 대한한방내과학회 2001 대한한방내과학회지 Vol.22 No.4

Each decoction of Coptidis Rhizoma, Scutellariae Radix and Phellodendri Cortex was orally administrated to the rates. And the effects on the Gastrin and Uropepsin secretions were observed. The results were as follows: 1. The effects on the secretio of Gastrin in the experimental groups administrered each with Coptidis Rhizoma and Scutellariae Radix comparing with the normal group, showed signficant values P<0.05, P<0.02, P<0.01 and P<0.001 separately. However the group medicated with Phellodendri Cortex showed significant values only 30 minutes after the administration. 2. Uropepsion level in the experimental group administered each with Coptidis Rhizoma and Phellodendri Cortex, comparing with the normal group, showed highly significant statistic values (P<0.001). Another experimental group medicated with Scutellariae Radix showed significantly statistical values (P<0.001) 240 minutes after the administration. 3. According to the above mentioned results it was onculuded tat the secretion of Gastrin in plasma and Uropepsin content of urine in albino rats treated with Coptiodis Rhizoma decoction were remarkaby increased as comparing with Scutellariae Radix and Phellodendri Cortex decoction.