초음파 백내장쪼개기와 작은 백내장쪼개기에 의한 백내장 수술의 비교

김덕수,김명준,김재용,차흥원,Deok-Soo Kim,Myoung-Joon Kim,Jae-Yong Kim,Hung-Won Tchah 대한안과학회 2005 대한안과학회지 Vol.46 No.11

Purpose: To compare effective phacoemulsification time (EPT), the severity of corneal swelling and corneal endothelial cell density after cataract surgery between the phaco chop method and the mini chop method. Methods: Cataract surgery was performed by phaco chop (15 eyes) or by mini chop (13 eyes) method in 28 eyes of 27 patients. The nuclear opacity of cataract grade was more than 5 on LOCS (Lens opacities classification system) III. EPT and the amount of irrigated BSS solution were measured during the operation. Corneal thickness (preoperative, immediate postoperative, postoperative 1 day, 1 week, 1 month, and 3 months) and corneal endothelial cell density (preoperative, postoperative 1month and 3 months) were measured. Results: The EPT of phaco chop group was 5.2 sec and that of mini chop was 1.0 sec (p=0.000). The amount of irrigated BSS was 193.7 ml and 170.4 ml in the phaco chop group and the mini chop group, respectively. The increase in corneal thickness was 3.2% and 0.9% at immediately after surgery (p=0.128), 19.0% and 10.5% at postoperative 1 day (p=0.088), 5.7% and 1.5% at postoperative 1 week (p=0.080), 0% and -1.3% at postoperative 1 month (p=0.717), and -0.4% and -0.6% at postoperative 3 months (p=0.890) in the phaco chop group and the mini chop group, respectively. Corneal endothelial cell density decreased 23.0% in the phaco chop group and 9.4% in the mini chop group at postoperative 1 month (p=0.005) and 22.9%, 12.6%, at 3 months respectively (p=0.036). Conclusions: The mini chop technique reduced permanent endothelial cell damage in comparison with the phaco chop method and might be more effective in decreasing corneal swelling during the early postoperative period than the phaco chop method.

내관(PC-6) 및 위유(BL-21)의 자침 및 수침이 xylazine을 투여한 개에 미치는 구토 억제효과

김덕수,유건주,이정연,김명철,신상태,김덕환,Kim, Duck-Soo,Liu, Jianzhu,Lee, Jung-Yeon,Kim, Myung-Cheol,Shin, Sang-Tae,Kim, Duck-Hwan 대한수의학회 2005 大韓獸醫學會誌 Vol.45 No.3

This study was performed to elucidate the effect of acupuncture and aqua-acupuncture in dogs. Each group was divided into control (18 dogs), PC-6 (6 dogs) and BL-21 (6 dogs) group for the antiemetic effect of acupuncture, respectively. And, the animals were divided into control (18 dogs), PC-6 (18 dogs) and BL-21 (18 dogs) group for the antiemetic effect of aqua-acupuncture with metoclopramide, respectively. 2% xylazine was injected to the all dogs to induce the emesis, and acupuncture and aqua-acupuncture treatment (0.5% metoclopramide) were applied to animals for 20 min. before xylazine injection, respectively. Emetic rates in PC-6 (33.3%) and BL-21 (16.7%) were lower than that of control group (44.4%) in acupuncture groups, respectively. Emetic rates in PC-6 (16.7%) and BL-21 (0.0%) were lower than that of control group (38.9%) in aqua-acupuncture groups, respectively. Based on these findings, it was considered that the antiemetic effects of acupuncture and aqua-puncture at BL-21 were more effective than those of PC-6 groups, and aqua-acupuncture with metoclopramide at BL-21 was the most effective among them.

SESSION 3 . CAD ; Generalized Voronoi Diagram and Its Applications

김덕수,황일규 ( Deok Soo Kim,Il Kyu Hwang ) 대한산업공학회 1992 대한산업공학회 추계학술대회논문집 Vol.1992 No.-

해외동향분석-일본 기술력의 근원과 일본 기술의 특성

김덕수,Kim, Deok-Su 과학기술정책연구원 1995 과학기술정책 Vol.- No.78

황반부종 치료를 위한 유리체강내 트리암시놀론 주입의 효용성

김덕수,박혜련,윤영희,Deok-Soo Kim,Hye-Ryun Park,Young-Hee Yoon 대한안과학회 2005 대한안과학회지 Vol.46 No.10

Purpose: To investigate the effect of an intravitreal injection of triamcinolone acetonide (TA) for the treatment of macular edema due to several causes. Methods: One hundred eyes of 98 patients (DM, 58 eyes; branch retinal vein occlusion, 42 eyes) who received an intravitreal injection of 4mg (0.1cc) TA were included in this study. We performed preoperative and 1-, 3- and 6-month postoperative examinations that included stereoscopic biomicroscopy, fluorescein angiography (71 eyes) and optical coherence tomography (85 eyes). Pre- and postoperative visual acuity and IOP were measured. Results: After 1 month, visual improvement by 1 line or more was achieved in 62 eyes (62.0%). Sixty-five eyes (65.0%) and 49 eyes (57.6%) showed improved visual acuity after 3 and 6 months, respectively. Macular thickness decreased by 46.5% after 1 month, by 49.4% after 3 months, and by 50.8% after 6 months. There were no significant differences in visual improvement or thickness reduction between diabetic macular edema and edema secondary to branch retinal vein occlusion. There was no correlation between improvement of visual acuity and macular edema thickness decrease. Complications included a transient rise in intraocular pressure in 9 eyes and a secondary cataract in one eye. Conclusions: Intravitreal injection of triamcinolone acetonide 4 mg (0.1 cc) is an effective, simple and safe treatment for diabetic macular edema and macular edema secondary to branch retinal vein occlusion.

칼슘 및 탈륨 이온으로 치환된 제올라이트 A, $Ca_xTl_{12-2x}-A$ (x = 1.4 및 5.6)를 탈수한 결정구조

김덕수,송승환,김양,Kim Duk Soo,Song Seong Hwan,Kim, Yang Korean Chemical Society 1993 대한화학회지 Vol.37 No.1

Two crystal structures of fully dehydrated Ca(II) and Tl(I) exchanged zeolite A, $Ca_{5.6}Tl_{0.8}-A (a = 12.242(2){\AA})\;and\;Ca_{1.4}Tl_{9.2}-A (a = 12.191(1){\AA})$, have been determined by single-crystal X-ray diffraction methods in the cubic space group Pm3m at 21(1)$^{\circ}C$. All crystals were ion exchanged in flowing streams of mixed $Ca(NO_3)_2\;and\;TINO_3$ aqueous solution with total concentration of 0.05M. All crystals were dehydrated at 360$^{\circ}C$ under $2{\times}10^{-6}\;torr$ for two days. The structures of the dehydrated $Ca_{5.6}Tl_{0.8}-A$ and $Ca_{1.4}Tl_{9.2}-A$ were refined to the final error indicies, $R_1$ = 0.072 and $R_2$ = 0.076 with 179 reflections for I > 3$\sigma$(I), and $R_1$ = 0.048 and $R_2$ = 0.043 with 226 reflections for I > 3$\sigma$(I), respectively. In each structure, Ca(II) ions are located on threefold axes associated with three 6-ring oxygens. $Ca^{2+}$ ions prefer to 6-ring sites and $Tl^+$ ions prefer to 8-ring sites when total number of exchanged cations per unit cell is more than 8. Ca(II) 와 Tl(I)으로 교환되고 완전히 진공 탈수된 2개의 제올라이트 A 결정 즉, $Ca_{5.6}Tl_{0.8}-A (a = 12.242(2){\AA})\;와\;Ca_{1.4}Tl_{9.2}-A (a = 12.191(1){\AA})$의 구조를 21(1)$^{\circ}C$에서 입방공간군 Pm3m을 사용하여 X-선 단결정 회절법으로 해석하였다. 이들 두 결정은 총농도를 0.05M로 한 $Ca(NO_3)_2$ 와 $$TINO_3$ 혼합용액을 사용하여 흐름법으로 이온교환하여 만들었고 탈수는 360$^{\circ}C$ 및 $2{\times}10^{-6}\;torr$에서 2일간 행하였다. $Ca_{5.6}Tl_{0.8}-A$ 구조에서는 I > 3$\sigma$(I)인 회절점 179개를 사용하여 $R_1$ = 0.072 와 $R_2$ = 0.076까지, $Ca_{1.4}Tl_{9.2}-A$구조에서는 I > 3$\sigma$(I)인 회절점 226개를 사용하여 $R_1$ = 0.048 and $R_2$ = 0.043까지 정밀화시켰다. 두 구조에서 Ca(II) 이온은 3개의 6-링 산소와 결합하면서 3회 회전축 상에 위치하였다. 단위세포당 교한된 양이온의 총수가 8개 이상이면 $Ca^{2+}$ 이온은 6-링 자리에, $Tl^+$ 이온은 8-링 자리에 우선적으로 위치한다.

Voronoi diagram as an analysis tool for spatial properties for ceramics

김덕수,정용재,JayJ.Kim,김동욱,윤광석 한양대학교 세라믹연구소 2002 Journal of Ceramic Processing Research Vol.3 No.3

While research in ceramics has focused on physical experiments, the need for computational aids is increasing more and more. Among several computer simulation tools for the design and analysis of various aspects of ceramics, the Voronoi diagram is introduced in this paper. The Voronoi diagram is a powerful tool in computational geometry which provides all spatial information among geometric objects in a system with an efficient data structure. In this paper, we present the properties of Voronoi diagrams and introduce various applications appropriate for research in ceramics.

EMBR을 이용한 연주공정에서의 난류유동 및 응고에 대한 연구

김덕수,김우승,Kim, Deok-Soo,Kim, Woo-Seung 대한기계학회 1999 大韓機械學會論文集B Vol.23 No.3

Two-dimensional turbulent fluid flow and solidification were investigated in a continuous casting process of a steel slab with electromagnetic field. The electromagnetic field was described by the Maxwell equations. The enthalpy-porosity relation was employed to suppress the velocity within a mushy region. A revised low-Reynolds number $k-{\varepsilon}$ turbulence model was used to consider the turbulent effects. It is shown that the temperature gradient in the casting direction in the case with EMBR becomes very weak compared to that of the case without EMBR. The results also show that the velocity profiles of the case with solidification are quite different from those of the case without solidification.

주한 미군 EC 프로젝트의 현황과 시공관리 주체의 변화에 대한 기초연구

김덕수,Kim, Duk-Su 한국건설관리학회 2006 건설관리 : 한국건설관리학회 학회지 Vol.7 No.3

주한 미군의 EC(Engineering/Construction) 시장에서 최근 나타나는 경향은: (1) MATOC(Multiple Award Task Order Contract)의 도입: (2)프로젝트의 대형화: 그리고 (3)대형 미국 EC회사들의 주한 미군 시장 진입으로 요약된다. 이러한 새로운 경향에 대한 이해를 바탕으로, 본 연구는 주한 미군 EC 시장의 변화를 시공관리 주체의 변화에 초점을 맞추어 분석한다. 구체적으로 살펴보면, 주한 미군 EC 프로젝트들은 FED에 의해 관리되어 왔다. 그러나 최근에는 대형 미국 민간 EC 회사들이 한국에 진입하여 FED의 시공관리 역할을 대체하고 있다. 이러한 현상은 향 후 10여 년 간의 LPP(Land Partnership Plan: 한미연합 토지 관리계획)에 의한 한국에서의 비즈니스 기회와 시공관리 주체의 민영화를 통해 군 관련 공사비를 절약하려는 미 정부의 의도에 따라 가속화 되고 있다. 이러한 시장의 변화는 미국 대형 EC 회사들과의 JV(Joint Venture)를 통해 외국 시장에 관한 정보를 획득하고 선진 시공 관리 기술을 배울 수 있는 기회가 되기 때문에, 주한 미군 한국 EC 시장에 진입하는 미국의 대형 EC 회사들은 주한 미군 공사를 수주해 온 국내 EC 회사들에게는 위협임과 동시에 기회일 수 있다. Emerging trends regarding USFK(United States Forces, Korea)'s EC(Engineering/Construction) market include: (1) introduction of MATOC(Multiple Award Task Order Contract); (2) increase of DB(Design-Build) contract; and (3) encroachment of large US-origin private EC firms upon Korea. This study analyzes the change of USFK's EC market with focus on the change of construction management actors for USFK's EC projects. Specifically, USFK's EC projects have been managed by FED(Far East District). Recently, however, the large US private EC companies substitute the role previously taken by FED. This phenomenon is accelerated by the business chances in Korea due to LPP(Land Partnership Plan) and intentions of US Government to save military construction costs by means of utilizing US private EC companies. The large US EC firms entering into Korea are business opportunities as well as challenges to Korean EC firms, which are contracting USFK's EC projects. This study concludes that, through teaming joint venture with the large US EC firms, the market changes can be opportunities to acquire foreign market information and learn advanced construction management skill from them.

전자기 브레이크를 적용한 연속주조공정에서의 난류유동 및 응고의 3차원 해석

김덕수,김우승,Kim, Deok-Soo,Kim, Woo-Seung 대한기계학회 1999 大韓機械學會論文集B Vol.23 No.10

A three-dimensional coupled turbulent fluid flow and solidification process were analyzed in a continuous casting process of a steel slab with Electromagnetic Brake(EMBR). A revised low-Reynolds number $k-{\varepsilon}$ turbulence model was used to consider the turbulent effects. The enthalpy-porosity relation was employed to suppress the velocity within a mushy region. The electromagnetic field was described by Maxwell equations. Tile application of EMBR to the mold region results in the decrease of the transfer of superheat to the narrow face, the increase of temperature in free surface region and most liquid of submold region, and the higher temperature gradient near the solidifying shell. The increasing magnetic flux density effects mainly to the surface temperature of the solidifying shell of narrow face, hardly to the one of wide face. It is seen that in the presence of EMBR a thicker solidifying shell is obtained at the narrow face of the slab.