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이완복,류대현,최태완 진주산업대학교 2004 論文集 Vol.43 No.-
Symmetric key cryptography algorithms are continuous repeating process of transpose and transposition, and have four modes of CBC, ECB, CFB, and OFB according to the operation methodology. Also, the algorithms have a number of computation because final cryptography sentences in the algorithm are internally accomplished by the various round of repeating computation. In this paper, we propose the pipelined design methodology to accelerate the cryptography operation in the ECB mode of block cryptography algorithm. In the proposed method, we implemented cryptography operation block of many rounds and can extremely improve overall operational speed because the method is continuously executed. As the results of estimation after designing the cryptography chip by pipelened structure, several tens of improved performance in the case of 3DES is possible, but we have known the generating of disadvantage that the chip size is increased.
비정질 금속 리본 Co66Fe4NiB14Si15 거대자기임피턴스 효과
이희복,조완식 公州大學校 基礎科學硏究所 1996 自然科學硏究 Vol.5 No.-
비정질 금속 ?? 거대자기임피턴스 효과를 측정하였다. 자기 임피턴스 효과는 강자성체 시료의 임피턴스가 시료에 걸어준 자기장에 따라서 달라지는 현상이다. MlR (Magnetoimpedance Ratios)는 ?? 정의되며 ? 시료방향으로 자기장을 가하여 임피턴스가 포화될 때의 자기장의 세기이다. 본 시료의 MIR 값은 적절한 자장중 열처리 후에 250 %이상 증가하였다. The giant magnetoimpedance (GMI) effect in amorphous ribbon ?? has been obtained. Magnetoimpedance (MI) effect is a high-frequency phenomenon, which describes the changes of impedance in any ferromagnetic sample, when a magnetic field is applied on it. MlR(Magnetoimpedance Ratios) is defined as ?? where ?? is the saturating field along the long side of the sample. The MIR of the sample has been reached as much as 250% after proper thermal treatments in a magnetic field.
TERUDERMIS를 이용한 골 혹은 건이 노출된 창상의 치료
최민호,이상복,황정욱,양완석,이강길 大韓成形外科學會 1999 Archives of Plastic Surgery Vol.26 No.3
Deep skin and soft tissue defects with exposed bone and tendon is difficult to treat, because skin graft rarely survives and flap surgery is sacrifice of donor site. Since "Stage I" membrane was developed by Yannas and Bruke in 1980, numerous kinds of artificial skin have been developed. The adaptability of "Terudermis", developed by the Terumo Co., as an artificial skin composed of sponge made of a fibrillar atelocollagen and a heat-denatured atelocollagen, was clinically evaluated on application to 13 cases presenting deep skin and soft tissue defect with exposed bones and tendons from October 1997 to march 1998. Terudermis has the advantage of allowing early incorporation of fibroblasts and capillaries into its collagen sponge due to very weak dehydrothermal cross-linking. Before Terudermis graft, several days of wet dressing and debridement were required to prepare healthy well- vascularized bed because Terudermis was weak on unsanitary wounds. After bed preparation, Terudermis was grafted like usual skin graft. Tie-over bolster dressing or compressive dressing was used case by case. The dressing was opened 2~3 days after Terudermis grafting. Wet dressing was done daily until the skin graft was done. Autologous skin graft was done 2∼3 weeks after Terudermis graft. Our clinical results indicated that Terudermis was beneficial in treating 77% of our patients. Through the use of this new method, treatment of severe skin and soft tissue defects that are usually treated by musculocutaneous or other conventional skin flaps can be replaced by Terudermis as an new artificial dermis.
이영필,이순실,박경호,신완균,손인자,이민화,이상복 한국병원약사회 1993 병원약사회지 Vol.10 No.4
Patient counseling and medication teaching was conducted on compliance and orientation to drug therapy for 278 headache patients from Apr. 1993 to Jul. 1993 by co-work of doctors and pharmacists. Counseling was conducted with medication teaching manual and drug sample and then it was recorded to currently medication history, adverse effects and counseling contents. In analysis of counseling contents, headache incidence was higher in female than male (71.6% : 28.4%) and highest on the fifties. The percentage of headache types of tension HA, migraine, mixed type HA was 76.1%, 13.5%, 10.8% respectively. 160 patients(66.1%) had been conducted compliance well. Adverse effects were appeared in the form drowsiness, GI trouble, dry mouth, weight gain, constipation.
Evaluation of internal fit of interim crown fabricated with CAD/CAM milling and 3D printing system
Wan-Sun Lee,Du-Hyeong Lee,Kyu-Bok Lee 대한치과보철학회 2017 The Journal of Advanced Prosthodontics Vol.9 No.4
PURPOSE. This study is to evaluate the internal fit of the crown manufactured by CAD/CAM milling method and 3D printing method. MATERIALS AND METHODS. The master model was fabricated with stainless steel by using CNC machine and the work model was created from the vinyl-polysiloxane impression. After scanning the working model, the design software is used to design the crown. The saved STL file is used on the CAD/CAM milling method and two types of 3D printing method to produce 10 interim crowns per group. Internal discrepancy measurement uses the silicon replica method and the measured data are analyzed with One-way ANOVA to verify the statistic significance. RESULTS. The discrepancy means (standard deviation) of the 3 groups are 171.6 (97.4) μm for the crown manufactured by the milling system and 149.1 (65.9) and 91.1 (36.4) μm, respectively, for the crowns manufactured with the two types of 3D printing system. There was a statistically significant difference and the 3D printing system group showed more outstanding value than the milling system group. CONCLUSION. The marginal and internal fit of the interim restoration has more outstanding 3D printing method than the CAD/CAM milling method. Therefore, the 3D printing method is considered as applicable for not only the interim restoration production, but also in the dental prosthesis production with a higher level of completion.
Electroluminescent Properties of Organic Light-emitting Diodes with Hole-injection Layer of CuPc
Lee, Jung-Bok,Lee, Won-Jae,Kim, Tae-Wan The Korean Institute of Electrical and Electronic 2014 Transactions on Electrical and Electronic Material Vol.15 No.1
Emission properties of the organic light-emitting diodes were investigated with the use of a hole-injection layer of copper(II)-phthalocyanine (CuPc). The manufactured device structure is indium-tin-oxide (ITO) (180 nm)/CuPc (0~50 nm)/N,N'-Bis(3-methylphenyl)-N,N'-diphenylbenzidine (TPD) (40 nm)/tris-(8-hydroxyquinoline) aluminum (III) ($Alq_3$) (60 nm)/Al(100 nm). We investigated the luminescence properties of $Alq_3$ which is affected by the CuPc hole-injection layer. Also, we studied the influence of light-emission properties in the structure of an ITO/CuPc/TPD/$Alq_3$/Al device depending on the several thicknesses of CuPc (0~50 nm) layer. As a result, it was found that the hole injection occurs smoothly in the device with 20 nm thick CuPc layer, and the properties become significantly worse in the device with a CuPc layer thickness higher than 40 nm. We studied the topography and external quantum efficiency depending on the layer thickness of CuPc. Also, we analyzed the electroluminescent characteristics in the low and high-voltage range.
DEVSIF Composer: A Synthesis Tool for Fast Interpretation of Simulation Models
Lee, Wan-Bok The Korea Institute of Information and Commucation 2008 Journal of information and communication convergen Vol.6 No.1
The methods or algorithms which can accelerate simulation speed became of great importance, as the modeling and simulation methodology for discrete event systems is used in many areas such as model validation/verification and performance evaluation. This paper proposes a tool named, DEVSIF composer. The tool is made of an automated compiled simulation technology and it builds a new composed model which can be executed much fast by composing the component models together. Models are described by our new specification language DEVSIF, which is compatible with object-oriented language and supports representation of a hierarchical model structure. Experimental results demonstrates that DEVSIF composer enhances the simulation speed of a transformed DEVS model 5 times faster than that of the original ones in average.