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미세먼지의 di(2-ethylhexyl) phthalate가 유도한 피부상피세포 사멸 신호전달기전 연구
박정배,김지윤,성정희,김용웅,이세중,Park, Jeong-Bae,Kim, Ji-Yun,Sung, Junghee,Kim, Yong-ung,Lee, Sei-Jung 한국환경과학회 2020 한국환경과학회지 Vol.29 No.3
Particulate matter with an aerodynamic diameter of less than 2.5 μM (PM<sub>2.5</sub>) is one of the major environmental pollutants. Di(2-ethylhexyl) phthalate (DEHP), an endocrine disrupting chemical in PM<sub>2.5</sub>, has been utilized for the manufacturing of polyvinyl chloride to increase the flexibility of final products. In the present study, we investigated the ecotoxicological effect of DEHP on the viability of skin keratinocytes (HaCaT). DEHP induced apoptotic cell death mediated by phosphorylation of extracellular signal-regulated kinase through the production of intracellular Reactive Oxygen Species (ROS). Interestingly, we found that DEHP induces the phosphorylation of the nuclear factor-kappa B responsible for the expression of cleaved caspase-3 as an executional cell death protease in HaCaT cells. On the basis of these results, we suggest that DEHP in PM<sub>2.5</sub> induces the apoptotic death of human keratinocytes via ROS-mediated signaling events.
방사선사진과 임상검사에서 하악 대구치 치근의 형태학적 구조 및 치조골 수준에 관한 비교연구
박정배,정진형,Park, Jung-Bae,Chung, Chin-Hyung 대한치주과학회 2004 Journal of Periodontal & Implant Science Vol.34 No.2
Periodontal defects of the furcation are characterized by several inherent anatomic factors that can make successful periodontal therapy difficult and results unpredictable. The severity and rate of occurrence of periodontal disease are directly related to the location of the furcation relative to the cementa-enamel junction and anatomical form of the root by limiting the accessibility and effectiveness of the periodontal instrumentation. This study investigated the reliability and accuracy of panoramic radiograph diagnoses of the periodontal state of mandibular molars, particularly regarding the diagnosis of furcation area periodontal defects, treatment planning, and prognosis prediction. This study examined a total of 110 teeth belonging to 33 subjects (19 male, 14 female) presenting with incipient to moderate periodontitis 4-7mmpocket depth. The alveolar bone level, length and width of the root trunk, and root separation angle were measured using the panoramic radiograph and compared to the results taken directly by retracting a full-thickness flap. The results of the study are as follows: 1. Data regarding the alveolar bone level of the mandibular first molar showed that the directly taken surgical measurements resulted in $5.1{\pm}0.9mm$ that was slightly deeper than the corresponding panoramic measurement resulted in $4.8{\pm}0.8mm$, but these differences were statistically insignificant (p>0.05). 2. The data of the directly taken surgical measurement of the mandibular second molar $(5.1{\pm}1.1mm)$ was slightly deeper than the corresponding panoramic measurement $(4.7{\pm}1.2mm)$, but these differences were statistically insignificant (p>0.05). 3. The measured values of the length and width of the mandibular first molar root trunks were determined to be $4.1{\pm}0.6mm$ and $7.3{\pm}0.9mm$, respectively, while the values of the mandibular second molar root trunks were determined to be $4.6{\pm}1.3mm$ and $7.6{\pm}0.9mm$ respectively. The differences between these values were found to be statistically significant (p<0.01). 4. The measured values of the root separation angle showed that the mandibular first molars averaged $34.5{\pm}4.4^{\circ}$, while the mandibular second molars averaged $23.0{\pm}10.0^{\circ}$. The differences between these values were found to be statistically significant (p<0.01).
박정배 ( Jeong Bae Park ),서영일 ( Young Il Seo ),정석순 ( Seok Soon Jung ) 한국이벤트컨벤션학회 2005 이벤트 컨벤션 연구 Vol.1 No.-
This research is to seek to provide an effective way of approach for the performing arts managers under the current circumstances of incongruities and inequalities in achieving the sponsorship. The arts managers in the performing arts sector should provide a cost-effective yet quality oriented production procedure by investing human resources for the organization along with providing the sponsorship manuals especially for the performing arts sector. It is also required to achieve the systemized sponsorship process and develop enhanced return services that are appropriate for the objective of the targeted corporate. As the researchers were unavoidably faced with the lacks of preceded research materials, constant and detailed research/studies are necessary to develop more concrete direction and to define the roles of the arts managers in the performing arts sector.
청소년 축구동아리 학생들이 지각하는 스포츠용품 브랜드 구매결정요인이 브랜드자산에 미치는 영향
박정배(Park, Jung-Bae),이태용(Lee, Tae-Yong) 한국사회체육학회 2015 한국사회체육학회지 Vol.0 No.61
The purpose of this study is to seek out the relations between concepts through establishes the relation between the brand equity and the purchase decision factors of sports goods by youth football club students based on theoretical backgrounds and also, to provide basic data that is needed to study on the sports goods consumers. This study represents a population of 373 persons who are selected as the subject for the final analysis of this study, by the convenient sampling method, from football club students in 20 high schools located in B Metropolitan city, U Metropolitan city, or K Prefecture. For processing data, Window SPSS 15.0 statistics package is used as follows, and the significance level of all data analysis is a=.05. Factor analysis, reliability analysis, co-relation analysis, frequency analysis, and multiple regression analysis have been done, and the results of these analyses are as follows: First, among sports goods purchase decision factors, advertisement has a positive effect on the brand loyalty. Second, such factors as quality, brand, and purchase place among sports goods purchase decision factors have a positive effect on the brand image. Third, such factors as quality, brand, and purchase place among sports goods purchase decision factors have a positive effect on the brand awareness.
브러시리스 직류 전동기용 새로운 센서리스 드라이브 개발에 관한 연구
박정배(Jung-Bae Park),장항제(Hang- Jea Chang),이용순(Yong-Soon Lee),유지윤(Ji-Yoon Yoo),이광운(Kwang-Woon Lee),여형기(Hyeong-Gee Yeo) 전력전자학회 2000 전력전자학술대회 논문집 Vol.2000 No.11
In this paper, we proposed a new sensorless drive system for the trapezoidal type brushless DC motor, which does not use any mechanical position or speed sensor and applicable to the systems requiring a constant speed and torque such as Fan.<br/> For this, a novel indirect rotor position sensing technique based on a detailed analysis of the terminal voltage characteristics is proposed in this paper. And a sensorless drive system for the brushless DC motor is implemented using a 87c196mc for the main microprocessor, and a power FET for the inverter.<br/> The experimental results will show the validity of the proposed indirect sensing method and the practical use of the sensorless drive.
고속 전철용 단상 PWM 컨버터의 고조파 저감에 관한 연구
박정배(Jung-Bae Park),임훈규(Hoon-Kyu Lim),이광운(Kwang-Woon Lee),여형기(Hyeong-Gee Yeo),유지윤(Ji-Yoon Yoo) 전력전자학회 1998 전력전자학술대회 논문집 Vol.- No.-
In the high speed rail system, the distortion of the voltage and the current waveform of the input power line, increases the power loss and make a several electro-magnetic problems such as EMI or the interference of the communication line.<br/> In this paper, the control scheme of the PWM converter to make a good power factor and to regulate the output voltage as well as to reduce the harmonic component of the input current is proposed. Also a control schem of the PWM converter in the parallel operation to reduce the harmonics of the input current is proposed<br/>
Grafting 방법을 이용한 직접메탄올연료전지 애노드 촉매의 성능향상에 관한 연구
박정배(Park, Jung-Bae),한국일(Han, Kook-Il),김하석(Kim, Ha-Suck) 한국신재생에너지학회 2006 한국신재생에너지학회 학술대회논문집 Vol.2006 No.11
PtRu catalyst is most widely used as anode catalyst for a direct methanol fuel cell(DMFC). To promote the efficiency of the catalysts, it Is important to increase the triple phase boundary. In this study, we have tried to increase the triple phase boundaries in preparing electrocatalysts of the fuel cells, based on the process of grafting a proton-conducting agent onto the catalyst This grafted proton-conducting agent can act as an ionomer like Nafion, currently widely used ionomer. First, we have prepared the 80wt% PtRu/Ketjen Black electrocatalyst by an improved colloidal method. And, we have grafted methylsulfonate groups (-CH₂SO₃H) into the catalyst as proton-conducting agents. As results of cyclic voltammety and single cell test of the membrane electrode assembly (MEA), we can conclude that the activity of the grafted electrocatalysts is superior to that of conventional ones, in performance of DMFCs. For our further study, we will investigate the optimum ratio of catalyst/grafted proton conduct Ing agent with maximum performance of a DMFC.
박정배(Jeong-Bae Park),정성민(Sungmin Jung),이승일(?Seungil Lee),김영신(Young Shin Kim),전필선(Pil Sun Jun) 한국추진공학회 2014 한국추진공학회 학술대회논문집 Vol.2014 No.12
항공기 또는 발사체, 유도무기와 같은 고속비행체의 가압식 연료탱크에는 비행 종단부에서 가속도의 급격한 변화에 따른 연료이송단절 방지와 엔진으로의 기체유입을 차단할 수 있는 특별한 장치가 필요하다. 이러한 측면에서 유체의 표면장력을 이용하여 기체유입을 차단하는 Surface tension screen과 가속도 변화에 영향을 감소시키는 Collector tank가 고안되었다. 본 논문에서는 장치의 성능을 예측하고 영향을 미치는 주요 인자들을 규명한다. 또한 장치에 이용되는 mesh screen의 성능을 예측하고 실험을 통해 결과를 확인 하였다. A special device is required to prevent the disconnection of fuel transfer as rapidly change of acceleration and the inflow of gas to the engine in a pressurized fuel tank. To meet this requirement, the tube using surface tension and Tank for decreasing influence of acceleration was developed. This article predict to the device’s performance and to determine significant factor affecting device’s performance. Analytical study of Mesh screens performance and expreiment of screens performance were conducted.