오염이 도재의 내부구조에 미치는 영향에 관한 주사전자현미경적 연구

박현배,동진근,진태호 원광대학교 치의학연구소 1991 圓光齒醫學 Vol.1 No.2

This study was performed to investigate the effect of contamination on the internal structure of porcelain. The gold-platinum, silver- palladium and nickel-chromium alloy and Ceramco porcelain powder were used in this study and specimens were contaminated with finger and silicone point. The observation of internal structure was performed with Scanning Electron Microanalyzer(Hitachi X-650, Japan). The obtained results were as follows 1. In contaminated alloys, the internal porosities were observed largely around the metal-porcelain interface in opaque porcelain layer. 2. The rates of porosity in porcelain with contaminated gold-platinum and nickel-chromium alloy were increased. 3. The rate of porosity was not influenced by finger contamination in silver-palladium alloy.

치아교모에 영향을 미치는 요인에 관한 연구

박현배,진태호 원광대학교 치의학연구소 1998 圓光齒醫學 Vol.8 No.3

This study was performed to investigate the factors related to tooth wear. For this study, 78 patients with temporomandibular disorders and 76 dental students without any signs and symptoms of temporomandibular disorders were selected as the patients group and as the normal group, respectively. Preferred chewing side, Angle's classification, lateral guidance pattern, head and shoulder posture were observed clinically. Electromyographic activity of anterior temporalis and masseter muscle were recorded with BioEMG^ and occlusal status were recorded with T-Scan^ . Wear facet area of each tooth was measured from working model of upper arch corresponding to the occlusal status from T-Scan. Wear facet area were measured with planimeter in ㎜^2. Total area were divided into incisal, canine, posterior tooth area. Anterior wearfacet area was incisor area plus canine area, and unilateral area was anterior area plus posterior area. The data collected were analyzed by SAS statistical program and the results of this study were as follows: 1. There was no significant difference between the two groups in total werafacet area, and male subjects showed tendency to have larger area in the normal group but female subjects showed tendency vice versa. 2. There was no significant difference related to preferred chewing side and Angle's classification, however, some difference was observed by lateral guidance pattern. Anterior wear facet area in subjects of canine guidance was the largest in the three subgroups. 3. Subjects with head tilting to right side had larger posterior and total area, and subjects with higher shoulder in right side had larger canine and anterior area than any other subgrous. 4. Electromyographic activity of masseter muscle was more correlated with wear facet area than anterior temporalis muscle, and tooth contact number and force were significantly correlated with wear facet area, but the most important factor affecting tooth attrition was age.

V2X 자율주행 서비스 기능 평가를 위한 가상환경구축 연구

박현배,전재석,송문형,김문식,곽수진 한국ITS학회 2017 한국ITS학회 학술대회 Vol.2017 No.04

CAN 메시지 조작 방법 분석 및 대응방안

박현배,김용은,전재석,문희석,우사무엘 보안공학연구지원센터 2018 보안공학연구논문지 Vol.16 No.4

Recently, the security for communication of automotive is become an issue due to hacking.In case of CAN communication used as a control signal of a vehicle, a single twisted wire is used for communication, which makes it easy to access for hacking. Also, because of using the 'recessive' and 'dominant' logic, it is possible to attack the bus using these CAN communication characteristics. Recently, a method to manipulate a specific control field to cause a bus off Error has been reported in the paper. In this paper, we describe how fully manipulated data can be received at Receiver(ECU) and we propose a method to prevent manipulation by changing the end of frame filed. 최근 차량의 해킹으로 인해 자동차보안은 이슈가 되고 있으며 차량의 제어신호로 사용되는 CAN 통신의 경우 하나의 꼬임선을 이용하여 통신을 하기 때문에 데이터 정보를 바꾸기 용이하다. CAN 통신에서는 우성 및 열성 비트가 도선에서 만나면 우성이 이기는 방식으로 중재를 수행한다. 이를 이용하여 최근에 특정 필드을 조작하여 Error를 유발시키는 방법이 발표되었다. 기존방식은 Error를 발생해서 통신을 중단시키는 방법에 대해서 제안했으나 본 논문에서는 CRC 및 데이터 필드를 동시에 변조하여 수신 ECU 측에서 Error를 유발시키지 않고 완벽하게 데이터를 조작하는 방법에 대해 제안하고 이를 막기 위한 대처방안을 제안하였다.

IEEE 1609.X 표준 적합성 시험을 위한 CVCOC 시험 환경 구축 및 분석

박현배 한국ITS학회 2018 한국ITS학회 학술대회 Vol.2018 No.04

전기이륜차용 ICT융합 E-smart 클러스터

박현배,김용은,전재석,김재은,곽수진,문희석 한국ITS학회 2015 한국ITS학회 학술대회 Vol.2015 No.04

식스시그마 기법을 활용한 수업품질향상에 관한 연구: 육사 경영학수업 강의평가결과를 중심으로

박현배,한찬옥,강원석 이화여자대학교 경영연구소 2016 신산업경영저널 Vol.34 No.2

Recently, the fitness for use which means product and quality of service that meets the expectations and needs of consumers is being magnified. However, there are only few studies that find out importance of quality in education part. This research aims to improve the quality of KMA national defense business administration lecture by using six sigma. Most of daily life of cadet is assigned to studying. So it is very important that cadets were satisfied with their classes. In this regard, six sigma can be used for improving the quality of lecture. The DMAIC method is used for this research. The DMAIC method consists of five steps: Define, Measure, Analysis, Improve and Control. Using this method, we find out the CTQ of national defense business administration lecture. Based on the CTQ, the lecture is reorganized and we observe that the sigma level related to lecture evaluation is improved from 2.19 to 3.72. The results obtained in this paper can be applied to improving the quality of the lectures other than national defense business administration lecture. 식스시그마는 고객의 소리를 통해 불량률을 줄이고 고객이 만족할 수 있도록 하는 방법으로써 사용품질을 향상시킬 수 있는 좋은 기법이다. 제조업이나 생산업에는 이 식스시그마 기법이 활발하게 사용되고 있지만 교육의 질을 높이기 위해 식스시그마 기법을 활용한 예는 별로 없는 것이 현실이다. 이에 본 연구는 식스시그마 기법을 통해 피교육자의 목소리를 듣고 수업의 질을 향상시킬 수 있는지 연구하기 위해 육군사관학교에서 실시한 경영학 수업 강의평가 결과를 식스시그마 기법을 활용하여 분석하였다. DMAIC 방법의 절차를 통해 강의평가 결과를 분석하고 수업을 개선한 결과, 강의평가관리 점수의 평균이 0.96점 높아졌고 시그마 수준이 2.19에서 3.72로 1.53만큼 증가하였다. 또한, 정의와 측정 단계를 거치면서 수업에 영향을 미칠 수 있는 요소들 중 컨텐츠 요인이 가장 핵심적이라는 것과 분석 및 개선 단계를 거쳐 시그마 수준이 1.53만큼 증가했음을 확인하였다. 즉, 본 연구를 통해 교육 분야에도 식스시그마 기법을 활용하여 시그마 수준 향상이 가능하며 수업의 질을 높여 피교육자들의 수업에 대한 만족도 또한 향상시킬 수 있음을 시사한다.

치아교모에 영향을 미치는 요인에 관한 연구

박현배,한경수,진태호,Park, Hyun-Bae,Han, Kyung-Soo,Jin, Tai-Ho 대한치과보철학회 1999 대한치과보철학회지 Vol.37 No.3

This study was performed to investigate the factors related to tooth wear. For this study, 78 patients with temporomandibular disorders and 76 dental students without any signs and symptoms of temporomandibular disorders were selected as the patients group and as the normal group, respectively. Preferred chewing side, Angle's classification, lateral guidance pattern, head and shoulder posture were observed clinically. Electromyographic activity of anterior temporalis and masseter muscle were recorded with $BioEMG^{(R)}$ and occlusal status were recorded with $T-Scan^{(R)}$. Wear facet area of each tooth was measured from working model of upper arch corresponding to the occlusal status from T-Scan. Wear facet area were measured with planimeter in $mm^2$. Total area were divided into incisal, canine, posterior tooth area. Anterior wearfacet area was incisor area plus canine area, and unilateral area was anterior area plus posterior area. The data collected were analyzed by SAS statistical program and the results of this study were as follows: 1. There was no significant difference between the two groups in total werafacet area, and male subjects showed tendency to have larger area in the normal group but female subjects showed tendency vice versa. 2. There was no significant difference related to preferred chewing side and Angle's classification, however some difference was observed by lateral guidance pattern. Anterior wear facet area in subjects of canine guidance was the largest in the three subgroups. 3. Subjects with head tilting to right side had larger posterior and total area, and subjects with higher shoulder in right side had larger canine and anterior area than any other subgrous. 4. Electromyographic activity of masseter muscle was more correlated with wear facet area than anterior temporalis muscle, and tooth contact number and force were significantly correlated with wear facet area, but the most important factor affecting tooth attrition was age.

스코폴라민 유도 기억력 손상 모델에서 새싹산양삼과 이를 포함한 경옥고 가미방의 기억력 개선 효과

박현배,김소연,박세진 강원대학교 농업생명과학연구원 2019 강원 농업생명환경연구 Vol.31 No.3

As the world population ages, the number of patients with dementia is expected to increase dramatically in the future. Ginseng (Panax ginseng C.A. Meyer) has many effects such as control of nerve function, control of body fluids and metabolic function, anti-diuretic, sexual enhancement, resistance to stress, improvement of digestion and absorption, and immune boosting effects. Kyung-Ok-Ko is widely used in traditional Korean medicine. The aim of this study is to investigate memory-enhancing properties of 70% ethanolic extracts of ginseng sprouts and modified Kyung-Ok-Ko. Alzheimer’s disease was induced by scopolamine treatment (1 mg/kg, i.p.) in mice. Passive avoidance and Y-maze tasks were performed by the mice to determine the effects of ginseng sprout extract and modified Kyung-Ok-Ko on memory. Ginseng sprout extract and modified Kyung-Ok-Ko significantly enhanced cognitive function and reduced scopolamineinduced cognitive impairment in mice. Compared to Kyung-Ok-Ko, modified Kyung-Ok-Ko had a significant memory-enhancing effect at a lower dose. Our findings suggest that ginseng sprout extract and modified Kyung-Ok-Ko attenuate cognitive impairment in mice.

자여자 유도발전기용 전압제어기 구현

박현배(Hyun Bae Park),김용은(Yongeun Kim),조현종(Hyun-Jong Cho),문희석(Hee Seok Moon) 한국자동차공학회 2016 한국자동차공학회 부문종합 학술대회 Vol.2016 No.5

Induction generator requires an excitation current to generate a rotating magnetic field by magnetize the iron core. Self-Excited generator is consist of inductor and capacitor. It is cheaper and maintenance is easier, so it has been applied to wind power. Self-Excited generator utilizes the principles of mutual resonance inductor and the capacitor so it generates a high voltage and greater the heat in the rotor. Therefore Power of Self-Excited generator should be controled by voltage control. In this paper, We implemented Controller of Resonant voltage and we verified the controller operating performance by motor dynamo.