• 한국정보통신학회논문지
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• 제16권9호
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• pp.1977-1982
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• 2012

컴퓨터나 스마트폰 사용자들은 최근에 다양한 소셜 네트워크 서비스가 제공되어 매우 편리하다. 소셜 네트워크 서비스는 사이버 공간에서 사용자가 원하는 멀티미디어 자료들을 저장해 두고 편리하게 이용할 수 있어서 좋다. 하지만, 서비스 사용자가 증가하면서 클라우드 저장소의 공간이 급격하게 증가하고, 서비스 사용자가 사망한 경우에는 빅-테이블이나 상속 문제가 발생하게 된다. 대표적으로 사망자가 남긴 디지털 자산들에 대한 게시, 유포, 보관, 그리고 상속에 관한 문제가 발생할 수 있다. 현재는 디지털 자산을 상속자가 서비스 제공자에게 사망자와 가족관계임을 밝히고, 사실 여부를 확인 받은 후에 디지털 자산에 대한 부분적인 사용, 저장, 그리고 백업만이 가능하다. 그러므로, 우리는 본 논문에서 상속자가 사망자가 남긴 디지털 자산을 쉽고 편리하게, 그리고 안전하게 상속할 수 있도록 하는 ADAM을 제안하고자 한다. ADAM을 사용하면 상속자는 정당한 상속절차를 거쳐서 일반적인 재산과 마찬가지로 디지털 자산에 대해서 자유롭고 편리하게 상속 받을 수 있다.

• 한국정보통신학회논문지
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• 제15권10호
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• pp.2209-2216
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• 2011

본 논문에서는 Magnachip $0.18{\mu}m$ 공정을 이용하여 PMIC용 32bit eFuse OTP IP를 설계하였다. eFuse 링크 아래에 N-Well을 두어 프로그램시 eFuse 링크와 p-기판의 VSS가 단락되는 문제점을 해결하였다. 그리고 디코딩된 WERP (WL Enable for Read or Program) 신호가 eFuse OTP 메모리로 바로 입력되는 경우 듀얼 포트 eFuse OTP 메모리 셀의 RWL (Read Word-Line)과 WWL (Write Word-Line)을 선택적으로 활성화해 주는 WL 구동회로를 제안하였다. 또한 BL 프리차징 회로에서 delay chain을 제거하여 제어회로의 레이아웃 면적을 줄였다. 메모리 테스트 장비를 이용하여 제작된 94개의 샘플 die를 측정한 결과 5.5V의 프로그램 전압에서 100%의 수율을 얻었다.

• 한국금형공학회:학술대회논문집
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• 한국금형공학회 2008년도 하계 학술대회
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• pp.197-202
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• 2008

With the growth of electrical power needs, demand of the knife-type switches in the distribution boards is increasing. We have developed a knife-type switch which is not currently produced in Korea. The switch was desinged and a comprehensive tooling for it was also accomplished. A total of two sets of injection molds and three sets of press dies were designed and manufactured. The parts for knife switches were produced using the tools. Finally, the parts were assembled together and the switch is now under the test phase.

• Design & Manufacturing
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• 제10권1호
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• pp.51-54
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• 2016

Metal sheet forming has been commonly used as the core technology in manufacturing parts of automobiles. It guarantees the highest production rate due to the process of mass production employing the press die. For precision of the product, the accuracy of the molds and its mechanic structures are considered as essential factors. One of these is fine blanking, which is utilized for the production of the metal sheet spring, with which clear sheer surfaces can be achieved in one operation from the materials. However, the current designs of press dies perform the forming analysis with the molds of rigid body, so they are focused on weight lightening by a rule of thumb. Therefore, this paper practice structural analysis about developing the semi fine-fine blanking technology. The semi fine-blanking can be run through the combination of the hydraulic cylinders and normal presses, so this paper analyze the amount of deformation according to the oil pressure. In addition, based on the plasticity of 50CrV4, the materials of the mold parts, the structural analysis and life analysis are proceeded, so they are expected to be useful as data for manufacturing the mold.

• 한국게임학회 논문지
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• 제10권1호
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• pp.15-23
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• 2010

슈팅 게임이나 플랫폼 게임과 같은 액션 게임에서는 플레이어 캐릭터가 적 캐릭터와 충돌하면 플레이어 캐릭터가 죽거나 에너지가 감소하게 되므로 적 캐릭터를 회피하는 요소가 중요하다. 본 논문에서는 적 캐릭터를 회피하는 요소가 중요한 게임에서 셀리언시(saliency)가 높은 물체가 있을 경우 게임의 난이도에 어떠한 영향을 미치는가에 대하여 고찰하였다. 플레이어는 셀리언시가 높은 물체의 움직임을 주목하게 되므로 이로 인해 셀리언시가 낮은 다른 많은 물체들의 움직임을 간과할 수 있다. 그 결과로 물체의 회피에 실패할 확률이 높아질 것이다. 본 연구에서는 셀리언시가 높은 물체의 존재여부가 게임 난이도에 미치는 영향을 검증하기 위해 사용자 실험을 수행하였으며, 셀리언시가 높은 물체가 없는 게임을 수행한 그룹이 셀리언시가 높은 물체가 있는 게임을 수행한 그룹보다 더 높은 점수를 획득하는 결과를 얻었다. 본 연구는 인간의 지각적인 측면에서 게임의 난이도에 영향을 끼칠 수 있는 요소를 살펴보고 이를 실험을 통해 검증하였고 이는 게임 제작 및 기획 단계에서 난이도 예측에 도움이 되는 요소가 될 수 있을 것이다.

• 대한치과보철학회지
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• 제43권1호
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• pp.30-40
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• 2005

Purpose. The purpose of this study was to compare the fracture strength of the IPS Empress ceramic crown according to the incisal reduction (2.0mm, 2.5mm, 3.0mm) and axial inclination ($4^{\circ}$, $8^{\circ}$, $12^{\circ}$) of the upper canine. Material and methods. After 10 metal dies were made for each group, the IPS Empress ceramic crowns were fabricated and each crown was cemented on each metal die with resin cement. The cemented crowns mounted on the testing jig were inclined 30 degrees and the universal testing machine was used to measure the fracture strength. Results. 1. The fracture strength of the ceramic crown with 3.0mm depth and $12^{\circ}$ inclination was the highest (839N) Crowns of 2.0mm depth and $12^{\circ}$ inclination had the lowest strength (559N). 2. There was no significant difference in the fracture strength by axial inclination in the same incisal reduction group. 3. The fracture mode of the crowns was similar. Most of fracture lines began at the loading area and extended through proximal surface perpendicular to the margin irrespective of incisal reduction.

• 대한치과보철학회지
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• 제43권5호
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• pp.622-632
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• 2005

Statement of problem: Silicone Index Tooth Tray impression system which does not use gingicord has a shortcoming. It takes time to remove internal wall of Silicone Index Tooth Tray for space of wash impression material. Purpose: This study was to evaluate whether providing certain space to impression body can prevent from doing complicated laboratory work. Material and methods: After mounting metal dies with shoulder and chamfer margins arbiturarily, SITT was produced using $Blu-mousse^(R)$. In one experimental group, wash impression was taken using $Fit-tester^(R)$ without removing interior surface of SITT and in the other group, wash impression was taken using $Fit-tester^(R)$ providing 0.5mm space in the SITT and then compared the differences in two groups. Results: 1. There was no significant difference between a group which did not allow space and a group which granted equal 0.5mm space. 2. There was no significant difference between gingival diameter, occlusal diameter of metal die that has shoulder margin and gingival diameter, occlusal diameter of metal die that has chamfer margin. 3. There was no significant difference between a group which did not take pick-up impression and a group which took pick-up impression through relining method using SITT 4. There was no significant difference between a group that poured immediately after taking primary impression and a group that poured after removing poured stone die. Conclusions: When taking an impression of an abutment using SITT impression system, it is considered to obtain clinically identical results between a group that did not grant a 0.5mm space within SITT for wash impression and a group which invest a space. Furthermore, it is considered possible to produce an individual die through secondary pouring.

• 대한치과보철학회지
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• 제34권4호
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• pp.850-868
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• 1996

The accuracy and dimensional stability of impression materials are one of the most important factors for successful prosthodontic treatment. The purpose of this study was to evaluate the accuracy of several dental elastomeric impression materials used widely and clinically : Impregum-$F^{(R)},\;Permlastic^{(R)},\;Silascon^{(R)},\;Perfect^{(R)},\;Xantopren^{(R)}$. There have been many studies to evaluate the accuracy of impression materials. But it has not been decided yet, which method was most suitable for the evaluation of the accuracy. In this study, two resin teeth, #15 & 25, were prepared with rounded shoulder margin and 90 degree cavosurface angle. For the polysulfide rubber and polyether, the custom tray was made at least 24 hours prior to impression taking. For the silicone rubber materials, putty/wash impression technique was applied in taking impressions. Marginal openings of the castings on the master dies and prepared resin teeth were measured under stereomicroscope. The results were statistically analyzed and compared between tested impression materials. The results were as follows ; 1. In the overall accuracy of impression materials, polyether was the most accurate one, followed by polysulfide, additional silicone and condensation silicone. 2. On the first model pouring, condensation silicone had the largest discrepancies and there was significant difference compared to the other impression materials. 3. Polysulfide had the least discrepancies in the first model pouring, but showed larger discrepancies in the immediate second pouring than the first pouring. 4. On the immediate second pouring, the discrepancy of polyether was shown to be the smallest, while the largest one was additional silicone. 5. Polyether and polysulfide rubber using custom impression trays showed superior accuracy to silicone rubber, putty/wash impression technique.

• The Journal of Advanced Prosthodontics
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• 제4권1호
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• pp.30-36
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• 2012

PURPOSE. The aim of this in-vitro investigation was to describe the effect of reinforcement with different fibers on impact strength of heat polymerized poly-methyl methacrylate (PMMA) denture base resin and to analyze the effect of surface treatment of the fibers on the impact strength. MATERIALS AND METHODS. The specimens were fabricated from the dies formed as per standard ASTM D4812. 2% by weight of glass, polyethylene and polypropylene fibers were incorporated in the PMMA resin. The Izod impact testing was performed on the unnotched specimens and the values obtained were analyzed using appropriate one way ANOVA, followed by unpaired t-test. Fractured ends of the samples were subjected to the SEM analysis. RESULTS. The polypropylene fibers with plasma treatment showed the highest impact strength ($9.229{\times}10^2$ J/m) followed by the plasma treated polyethylene fibers ($9.096{\times}10^2$ J/m), untreated polypropylene fibers ($8.697{\times}10^2$ J/m), untreated polyethylene fibers ($7.580{\times}10^2$ J/m), silane treated glass fibers ($6.448{\times}10^2$ J/m) and untreated glass fibers ($5.764{\times}10^2$ J/m). Also the surface treatment of all the fibers has shown the significant improvement in impact strength. Findings of the SEM analysis justified the improvement in impact strength after surface treatment. CONCLUSION. Reinforcement with the fiber is an effective method to increase the impact strength of PMMA denture base resin. The surface treatment of fibers further increases the impact strength significantly.

• 한국독어학회지:독어학
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• 제7집
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• pp.193-213
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• 2003

In dieser Arbeit wird der Versuch unternommen, die Rede Hitlers vom 10.12.1940 zu analysieren. Diese Rede $geh\"{o}rt$ zur politischen Rede. In dieser Rede gibt es verschiedene Funktionen. Sie dient der Erzeugung und Zusammenfassung von Massen im Vereinigungsakt, weiterhin der Verschleierung der realen $Verh\"{a}ltnisse$. Die dritte Funktion kann man in der Legitimation von Herrschaft sehen. Im ersten Abschnitt wird die inszenatorische Ebene der Rede beschrieben. Die Halle ist durch einige Hakenkreuzfahnen nur wenig $geschm\"{u}ckt$. Dies wirkt eine $N\"{u}chternheit$, die das Publikurn seine gewohnte Umgebung neu erheben $l\"{a}sst$. Die stiliserte Glorie ist geeignet innere Haltung zu provozieren, die Opfer der $verst\"{a}rkten$ Arbeitsbelastungen ertragen lassen sollen. Im Abschnitt zwei wird die Rede nach rhetotischen Kriterien analysiert. Hier handelt es sich um die $f\"{u}nf$ Bearbeitungsphasen der Rede, und zwar, inventio, dispositio, e1ocutio, memoria und pronuntiatio. Die dispositio ist der Gegenstand dieser Arbeit. Nomalerweise gliedert sich dispositio in vier Elemente, $n\"{a}mlich$ Einleitung, Schilderung des Sachverhalts, $Begr\"{u}ndung$ und $Schlu\ss$. Mit dem rhetorischen Aufbau wird eine summarische Darstellung der politischen Absichten und Ziele des Redners gegeben. Die Rede selbst hat deutlichen Appellcharakter. Die $Entr\"{u}ckung$ durch den Appell ist eine der hier $gew\"{a}hlten$ rhetorischen Methode, um die erwiinschte Wirkung bei den Zuhoren zu erzielen. Hitler versuchte, die durch die Aktivierung zwischen ihm und Publikum vorhanden, $unbewu\ss$ten psychischen Potentiale, die durch den Akt der Rede aktiviert werden, zu realisieren.