Angle 氏 Ⅲ級 不正交合의 治驗一例

成在鉉(Jae-Hyun Sung),權五源(Oh-Won Kwon) 대한치과교정학회 1981 대한치과교정학회지 Vol.11 No.1

A girl aged 18 years and 1 month, had a Angle`s Class Iff malocclusion, characterized by anterior crossbite, anterior crowding, and constriction from right lower 2nd p emolar to right lower 2nd molar This ~i5 5s patient underwent scaling and 84148 extraction, and multibanded system was placed. After 14 months, anterior crossbite and crowding was corrected, andbothdental arches were improved. After 6 months from debanding, band space disappeared,, and any relapse was not detected.

영화 공간 사운드 제작연구

성재현(Sung, Jae-Hyun),이민아(Lee, Min-Ah) 한국영화학회 2014 영화연구 Vol.0 No.61

Space in the film is expressed by a variety of different forms of meaning and furthermore space could be the reason in the presence of a work. space in the film plays a important roll of tasks in making up the area of the screen image and sound over the visual space through sound consists of auditory space. sound has its own screen composition techniques that generate an idea of adding space in space, as well as in the surrounded existing through amalgamate a foe space to a visual image. In production’s aspect, it is very important in sound configuration that an ambience of stems in term of expressing film sound, makes people to concentrate in storytelling. sound, the configuration of ambience is to relocate the two-dimensional space into the three dimensional space. this reproduces the overall expression of images and realistic nature. there are many kinds of sound system, however none of these are excludable. people may think all of these difference stem’s components are recognized through psycho-acoustic system. although an ambience gives understanding of psycho-acoustic system, people can be disturbed if a main idea of configuration is different from the image. Many scenes in the film make the decisions by using the continuity of sound. discontinuity of scenes often happens in low budget featured films, or student films due to the different size of pictures and disharmony of ambience. In order to have the power of persuasion in spatial sound in the film, it is important to acquire the audience’s perception by efficient operation system, arrangement and design. this study was designed to discuss the ambience in sound system. This paper is written to describe the sound system by stems. it will analyze theories specifically for ambience and detail relationship between visual and sound in the film 〈Gravity〉.despite to other movies,〈Gravity〉 has been praised for using whole new different realistic visual and sound effect that people have never experienced in the field of cinematic spacious and it received sound award and sound editing award in Academy Award 2013. 〈Gravity〉has contributed a lot in the field of ambience analysis and this paper will talk about the technical and artistic parts of the research and discussions in the special sound.

성장기아동의 반대교합치료에 관한 임상적 고찰

성재현(Jae-Hyun Sung) 대한치과교정학회 1982 대한치과교정학회지 Vol.12 No.2

The author evaluated the effect of chin cap for the growing patient with cross-bite. The date were obtainde from superimposition of per and post-treatment lateral cephaograms. The results might be as follows; 1. increase ANB angle, Y-axis angle, SN-MP angle. 2. made anterior facial hright more greater than posterior facial hright. 3. as a results, rotate mandible backward.

O. M. A (後頭頣部 定裝置)의 治療 効果에 對한 考察

成在鉉(Jae-Hyun Sung) 대한치과교정학회 1984 대한치과교정학회지 Vol.14 No.1

兩顎齒性前突症의 矯正治驗例

成在鉉(Jae Hyun Sung) 대한치과의사협회 1978 대한치과의사협회지 Vol.16 No.5

甚한 Angle氏 III級 不正咬合의 治驗例

成在鉉(Jae Hyun Sung) 대한치과의사협회 1978 대한치과의사협회지 Vol.16 No.4

韓國人學童의 初期混合齒列期에서 頭蓋顔面의 成長變化에 關한 累年的 硏究

成在鉉(Jae hyun Sung) 대한치과의사협회 1975 대한치과의사협회지 Vol.13 No.3

재구성가능 연산증폭기를 사용한 저전력 4차 델타-시그마 변조기 설계

성재현(Jae-Hyeon Sung),이동현(Dong-Hyun Lee),윤광섭(Kwang Sub Yoon) 대한전자공학회 2017 전자공학회논문지 Vol.54 No.5

본 논문에서는 생체 신호 처리를 위한 12비트 이상의 고 해상도를 갖는 저 전력 CMOS 4차 델타-시그마 변조기를 설계하였다. 제안하는 4차 델타-시그마 변조기는 시간 분할 기법을 이용하여 회로를 시간에 따라 재구성해 4개의 연산증폭기가 필요한 회로를 1개의 연산증폭기만으로 구동 시켰다. 이를 통하여 일반적인 구조보다 전력소모를 75% 감소시킬 수 있다. 또한 kT/C 잡음과 칩 면적을 고려하여 변조기의 입력단과 출력 단의 커패시터들을 안정적으로 구동하기 위하여 적분기내 가변되는 증폭기를 설계하였다. 첫 번째와 두 번째 클럭 위상에서는 2단 연산 증폭기가 동작하고, 세 번째와 네 번째 위상에서는 1단 연산 증폭기가 동작한다. 이로 인하여 두 가지 위상 조건에서 연산증폭기의 위상여유가 60~90도 이내에 존재하게 하므로서 변조기의 안정성을 크게 향상시켰다. 제안한 변조기는 0.18μm CMOS N-well 1 poly 6 metal 공정을 이용하여 제작되었으며, 1.8V의 공급전압에서 354μW의 전력소모가 측정되었다. 256kHz의 동작주파수, 128배의 오버샘플링 비율 조건에서 250Hz의 입력 신호를 인가하였을 때, 최대 SNDR은 72.8dB, ENOB은 11.8 비트로 측정되었다. 또한 종합 성능 평가지수인 FOM(Walden)은 49.6pJ/step, FOM(Schreier)는 154.5dB로 측정되었다. In this paper, a low power 4th order delta-sigma modulator was designed with a high resolution of 12 bits or more for the biological signal processing. Using time-interleaving technique, 4th order delta-sigma modulator was designed with one operational amplifier. So power consumption can be reduced to 1/4 than a conventional structure. To operate stably in the big difference between the two capacitor for kT/C noise and chip size, the variable-stage amplifier was designed. In the first phase and second phase, the operational amplifier is operating in a 2-stage. In the third and fourth phase, the operational amplifier is operating in a 1-stage. This was significantly improved the stability of the modulator because the phase margin exists within 60~90deg. The proposed delta-sigma modulator is designed in a standard 0.18μm CMOS n-well 1 poly 6 Metal technology and dissipates the power of 354μW with supply voltage of 1.8V. The ENOB of 11.8bit and SNDR of 72.8dB at 250Hz input frequency and 256kHz sampling frequency. From measurement results FOM1 is calculated to 49.6pJ/step and FOM2 is calculated to 154.5dB.

송수설비 운영 분석을 통한 에너지효율 향상 방안 고찰

성재현(Jaehyun Sung),안재후(Jaehoo An),이재흥(Jaeheung Lee) 대한전기학회 2020 대한전기학회 학술대회 논문집 Vol.2020 No.7

기계적 자극이 MC3T3-E1 세포의 Alkaline Phosphatase Activitry에 미치는 영향

배성민(Sung-Min Bae),경희문(Hee-Moon Kyung),성재현(Jae-Hvun Sung) 대한치과교정학회 1996 대한치과교정학회지 Vol.26 No.3

교정력은 치아이동과 악골성장을 조절하는 기계적 자극이며, 이러한 기계적 자극에 골세포가 반응하므로써 치조골과 악골의 개조가 일어난다. 이러한 기계적 자극은 크게 압축력과 인장력으로 대별된다. 따라서 본 연구는 인장력 및 압축력의 서로다른 기계적자극이 세포활성에 미치는 차이를 알아보기 위하여 조골세포주 MC3T3-E1세포를 24well 배양접시에 well당 2×10⁴개의 세포를 넣어 배양한 후, 밀생상태가 되었을때 Diaphragm pump을 사용하여, 25g/cm^² 및 300g/cm^²의 압축력과 -25g/cm^² 및 -300g/cm^²의 인장력을 지속적으로 가하였다. 배양한 후 각각 4일, 6일, 10일, 14일, 18일, 20일째에 ALP활성을 측정한 결과 같은 크기의 압력에서는 인장력에 비해 압축력을 가한 경우에서 ALP활성도가 증가되었으나, 세포는 기계적 자극의 양상 즉 압축력과 인장력을 구별하여 다르게 반응을 하지는 않는 것 같았다. 인장력과 압축력 모두에서 ALP활성도는 시간이 지남에 따라 대조군 수준으로 돌아왔다. 이는 기계적 자극은 세포의 증식과 분화가 왕성한 시기에 세포활성도에 더 크게 영향을 미치는 것으로 생각되며, 압축력과 인장력에 관계없이 기계적 자극의 양이 클수록 ALP활성도의 최고치 도달시간이 지연되어, 기계적 자극의 세기는 세포활성도에 영향을 미칠 것으로 사료된다. Orthodontic force is a mechanical stress controlling both of tooth movement and skeletal growth. The mechanical stress stimulate bone cells that may exert some influence on bone remodeling. The purpose of this study was to evaluate the difference in cellular activity depending on mechanical stresses such as compressive and tensile force by determining the alkaline phosphatase(ALP) activity. A clonal osteogenic cell line MC3T3-E1 was seeded into a 24-well plate(2 x 10⁴/well). At the confluent phase, a continuous compressive hydrostatic pressure(25g/cm^², 300g/cm^²) and continuous tensile hydrostatic pressure( -25g/cm^², -300g/cm^²) were applied for 4, 6, 10, 14, 18, 20 days respectively by a diaphgragm pump. At the end of the stimulation period, cell layers were prepared for ALP activity assay. The ALP activity of the compressive group increased more than that of the tensile group at same force magnitude, whereas the cells responded to a similar pattern regardless of the type of mechanical stress. The ALP activity of the compressive and tensile group turned into the level of the control group as the length of time increased. These results indicated that a mechanical stress may be more effective on cellular activity during active cellular proliferation and differentiation periods. The time to achieve maximum ALP activity was delayed as the mechanical stress increased in both the compressive and the tensile group. Accordingly, the magnitude of the stress rather than the type of mechanical stress may have more influence on cellular activity.