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

Ni-36at.%Al을 함유하는 나도 결정립의 NiAl 합금이 기계적 합금화법에 의해 제조되었다. 제조된 분말은 방전 플라즈마 소결법에 의해 만들어졌다. 상변테에 영향을 주는 인자는 냉각속도와 열처리 시간의 조건으로 논의되었다. 소결체의 상변태 거동은 시차 열분석(DSC)과 X-선 회절(XRD) 분석법에 의해 조사되었다. 미세구조는 주사전자현미경(SEM)으로 관찰되었다. 마르텐사이트 격사상수와 체적 분율은 X-선 회절분석법 중 직접비교법에 의해 계산되었다. 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.

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. 국방분야 무기체계 형상관리를 위한 자료관리 정보체계인 국방조달관리체계와 국방형상관리정보체계에 대하여 상호운용성수준을 측정하고, 측정된 결과를 분석하여 두 정보체계간의 상호운용성 수준을 판단하여, 장차 정보체계 성능개선사업시 반영하기 위한 방향을 제시하였다.

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. The temporal and spatial temperature distribution of the heat storage mortar made of porous feldspar was measured and the thermal properties and electricity consumption were analyzed. For the experiment, two real size chambers (control model and test model) with hot water pipes were constructed. Two large scale models with hot water pipes were constructed. The surface temperature change of the heat storage layer was remotely monitored during the heating and cooling process using infrared thermal imaging camera and temperature sensor. The temperature increased from $20^{\circ}C$ to $30^{\circ}C$ under the heating condition. The temperature of the heat storage layer of the test model was $2.0-3.5^{\circ}C$ higher than the control model and the time to reach the target temperature was shortened. As the distance from the hot water pipe increased, the temperature gap increased from $4.0^{\circ}C$ to $4.8^{\circ}C$. The power consumed until the surface temperature of the heat storage layer reached $30^{\circ}C$ was 2.2 times that of the control model. From the heating experiment, the stepwise temperature and electricity consumption were calculated, and the electricity consumption of the heat storage layer of the test model was reduced by 66%. In the cooling experiment, the surface temperature of the heat storage layer of the test model was maintained $2^{\circ}C$ higher than that of the control model. The heat storage effect of the porous feldspar mortar was confirmed by the temperature experiment. With considering that the time to reheat the heat storage layer is extended, the energy efficiency will be increased.

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.

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.

지진 안전 극대화를 위한 R&D 연계 방안

김성욱,Kim, Seong-Uk 한국방재협회 2017 방재저널 Vol.19 No.1

세계속의 아름다운 콘크리트 사장교

김성욱,Kim, Seong-Uk 한국시멘트협회 2008 시멘트 Vol.179 No.-

옥천대에 대한 고자기 연구 : 태백지역에서의 대자율 비등방성과 지구조적 응력장

김성욱,최은경,정연규,김인수,Kim, Sung-Wook,Choi, Eun-Kyeong,Jung, Yeon-Kyu,Kim, In-Soo 대한자원환경지질학회 1997 자원환경지질 Vol.30 No.6

A study of anisotropy of magnetic susceptibility (AMS) was conducted on the Ordovician-Eocene strata in the Taebaek area. The study area is a northeastern part of the Okchon belt, sometimes called as Paegunsan Synclinal Area. A total of 600 independently oriented samples were collected from 60 sites covering the whole area. With a few exception of late Cretaceous-Eocene volcanic rocks, all the sampled strata are nonmetamorphosed sedimentary rocks, mainly sandstones. Among the 60 sites, 5 sites showed flow lineation lying on the bedding plane, 11 sites showed load foliation parallel to the bedding plane, and 21 sites showed tectonic foliation unrelated to the bedding plane. The tectonic foliations are defined by $k_1-k_2$ ($k_{max}-k_{int}$) anisotropy plane, and are considered as a result of tectonic forces acted perpendicularly to the foliation plane in the geologic past. Regardless of sample-site locations, tectonic force directions defined by $k_3$ ($k_{min}$) axis perpendicular to the tectonic foliation are consistent among the strata of the same geologic age. In the course of geologic time, however, the tectonic force directions showed a clockwise rotation: approximately E-W in the Ordovician sites, NW-SE in the Permian sites, N-S in the Triassic sites, and lastly NE-SW in the late Cretaceous-Eocene sites. The pre-Permian directions showed better clustering in the in-situ (geographic) coordinates, while the younger directions become better clustered after the bedding-tilt correction. It is interpreted that the major tectonic structures of the Taebaek area were controlled by the above-mentioned tectonic forces: The Paegunsan Syncline and the Hambaeksan Fault must have been generated by the NW-SE force of late Permian-early Triassic time. It was then reactivated in the reverse (dextral) sense by the N-S force of Triassic time. The Osipchon Fault in the eastern part of the study area was either generated or reactivated by the NE-SW force of late Cretaceous-Eocene time. The Permo-Triassic NW-SE force should be an expression of the Songnim Disturbance in the Korean peninsula, which is in turn related with the SCB/NCB collision in China.

토피라메이트에 의해 발생한 급성 근시 2예

김성욱,서성관,허준,안기수,최봉준.Seong Wook Kim. M.D.. Seong Gwan Seo. M.D.. Jun Her. M.D.. Ki Soo Ahn. M.D.. Bong Jun Choi. M.D. 대한안과학회 2008 대한안과학회지 Vol.49 No.6

Purpose: We describe 2 cases of bilateral acute myopia associated with topiramate, a drug that has recently been prescribed for epilepsy or weight reduction. Case summary: A 24-year-old woman and a 25-year-old woman, both previously devoid of ocular problems, visited our hospital with blurry vision after taking topiramate for weight reduction. A thorough medical history review and ocular examinations, including a slit lamp examination, were performed. Conclusions: Slit-lamp examinations revealed forward displacement of the lens-iris diaphragm, which resulted in myopia and anterior chamber shallowing. Discontinuation of topiramate and the administration of cycloplegic agents successfully resolved the symptoms. J Korean Ophthalmol Soc 49(6):1033-1040, 2008

홍화약침(紅花藥針)이 국소뇌혈류량(局所腦血流量) 및 평균혈압(平均血壓)에 미치는 실험적(實驗的) 영향(影響)

김성욱,정현우,위통순,조명래,윤여충,Kim, Sung-wook,Jeong, Hyun-woo,Wei, Tung-shuen,Cho, Myeng-rae,Yun, Yeo-choong 대한침구의학회 2004 대한침구의학회지 Vol.21 No.2

Objective : Carthami Flos has been used as a herb to promote blood circulation to remove blood stasis in oriental medicine for many centuries. To investigate treatment of cerebral vascular disease(CVA) by promoting blood circulation and removing blood stasis(活血化瘀法), we observed the experimental Effects of Aqua-Acupuncture of Carthami Flos on the Regional Cerebral Blood Flow and Mean Arterial Blood Pressure in Rats. Method : When aqua-acupuncture of Carthami Flos(ACF) was injected into LI4, Liv3, B23, B62, GV16, experimental effects of ACF on the regional cerebral blood flow(rCBF) and mean arterial blood pressure(MABP) is not known. Therefor, this study was designed to investigate the effects of ACF on the change of cerebral hemodynamics. The changes of rCBF and MABP were tested by Laser Doppler Flowmetry(LDF). Results : When ACF was injected into LI4, change of rCBF and MABP were decreased in a injected time-dependent manner. When ACF was injected into Liv3, change of rCBF and MABP were decreased in a injected time-dependent manner. When ACF was injected into B23, change of rCBF was significantly increased in a injected time-dependent manner, MABP did not change. When ACF was injected into B62, change of rCBF was increased in a injected time-dependent manner, change of MABP was significantly decreased after injection 60min. When ACF was injected into GV16, change of rCBF and MABP were similar to the change of normal. Conclusions : In conclusion, I suggested that ACF(LI4, Liv3) has an effect that depress the blood pressure & cerebral hemodynamic acceleration and ACF(B23, B62) has an anti-ischemic effect through the improvement of crebral hemodynamics.