진공증착법으로 제조된 PVDF 유기박막의 압전 센서 응답 특성에 관한 연구

박수홍,Park, Soo-Hong 한국진공학회 2008 Applied Science and Convergence Technology Vol.17 No.5

본 논문의 목적은 진공증착법을 이용한 $\beta$-PVDF($\beta$-Polyvinylidene fluoride) 유기 박막의 제조와 제조된 유기 박막의 압전 특성을 연구하는데 있다. 진공 증착은 증발원 온도 $270^{\circ}C$, 인가 전계 142.4kV/cm, 진공도 $2.0{\times}10^{-5}Torr$에서 실시하였다. 기판 온도의 증가에 따라서 $\beta$형태의 PVDF 함유량은 72%에서 95.5%로 증가함을 알 수 있었다. 힘 모우멘트를 $1.372{\times}10^{-5}N{\cdot}m$에서 $39.2{\times}10^{-5}N{\cdot}m$로 변화시킨 응답특성의 경우, 출력전압은 1.39V에서 7.04V로 증가하였다. The purpose of this paper is to discuss the fabrication of $\beta$-PVDF($\beta$-Polyvinylidene fluoride, ${\beta}-PVF_2$) organic thin films through the vapor deposition method and to investigate the piezoelectric properties of the organic thin films produced. Vapor deposition was performed under the following conditions : the temperature of evaporator, the applied electric field and the pressure of reaction chamber were $270^{\circ}C$, 142.4 kV/cm and $2.0{\times}10^{-5}Torr$, respectively. The results showed that the amount of $\beta$-form PVDF increased from 72 % to 95.5 % with an increase in the substrate temperature. In the case of a sensor response characteristic by varying the force moment from $1.372{\times}10^{-5}N{\cdot}m$ to $39.2{\times}10^{-5}N{\cdot}m$, the output voltage increased from 1.39V to 7.04V.

통신위성에 작용하는 섭동력의 영향평가와 궤도결정

박수홍,Park, Soo-Hong 한국정밀공학회 1992 한국정밀공학회지 Vol. No.

This study concerns about the orbit prediction and orbit determination of Korean future communication satellite, called 'Moogunghwa", which will be motioned in the geo-stationary orbit. Perturbation effect on the satellite orbit due to nonspherical gravitation of the earth, gravitation of the sun and moon, radiation of sun, drag of the atmosphere was investigated. Cowell's method is used for orbit prediction. Orbit determination was performed by using Extended Kalman Filter which is suitable for real-time orbit determination. The result shows that the chacteristics of the satellite orbit has east-west and south-north drift. So the periodic control time and control value in the view of the periodic of error can be provided. The orbit determination demonstrated the effectiveness since the convergence performance on the positon and velocity error, and state error standard deviation is reasonable.able.

진공증착법으로 제조된 PVDF 유기박막의 초음파 응답 특성에 관한 연구

박수홍,Park, Soo-Hong 한국진공학회 2009 Applied Science and Convergence Technology Vol.18 No.3

본 논문의 목적은 진공증착법을 이용한 $\beta$-PVDF($\beta$-Polyvinylidene fluoride) 유기 박막의 제조와 제조된 유기 박막의 초음파 응답 특성을 연구하는데 있다. 진공 증착은 증발원 온도 $270^{\circ}C$, 인가 전계 142.4kV/cm, 진공도 $2.0{\times}10^{-5}Torr$에서 실시하였다. 기판온도의 증가에 따라서 결정화도는 47%에서 67.8%로 증가함을 알 수 있었다. 초음파 응답특성에서 거리를 1cm에서 100cm로 변화시켰을 경우, 출력전압은 0.615V에서 0.4V로 감소하였다. The purpose of this paper is to discuss the fabrication of $\beta$-PVDF($\beta$-Polyvinylidene fluoride, $\beta$-PVF2) organic thin films through the vapor deposition method and to investigate the ultrasonic response properties of the organic thin films produced. Vapor deposition was performed under the following conditions : the temperature of evaporator, the applied electric field and the pressure of reaction chamber were $270^{\circ}C$, 142.4 kV/cm and $2.0{\times}10^{-5}\;Torr$, respectively. The results showed that the degree of crystallinity increased from 47% to 67.8% with an increase in the substrate temperature. In the case of a sensor response characteristic by varying the distance from 1cm to 100cm, the output voltage decreased from 0.615V to 0.4V.

전산유체역학(CFD) 분석법을 이용한 High Wind Velocity/High Drying Time 헤어드라이어의 개발

박수홍(Soo-Hong Park),박종찬(Jong-Chan Park) 대한전기학회 2016 전기학회논문지 P Vol.65 No.4

This paper describes a design of a hair drier to improve its performance. the performance of the hair drier can be improved by increasing the wind velocity of its discharge port. the design of the hair drier is accomplished by using the CFD. the validity of design results were verified by comparison with the dry change of the hair drier. In this paper, the initial condition of the applied hair drier is as follows, the number of the blade is 9, the diameter of the suction port is 40[mm], the tip clearance is 12.5[mm], the con angle is 28.5° and the fan angle is 27.5R. From design results, the enhanced condition of the hair drier can be obtained as follows, the number of the blade is 3, the diameter of the suction port is 50[mm], the tip clearance is 10.5[mm], the con angle is 21.5° and the fan angle is 75R. At the enhanced condition of the hair drier, the wind velocity of the hair drier is 29[%] increase, and the dry time is 40[%] increase compare to the initial condition of the hair drier.

Filtered-x LMS 알고리즘을 이용한 유연한 외팔보의 능동진동제어

박수홍(Soo Hong Park),홍진석(Jin-Seok Hong),김흥섭(Heung Seob Kim),오재응(Jae-Eung Oh) Korean Society for Precision Engineering 1997 한국정밀공학회지 Vol.14 No.3

의류 유통경로별 판매지수에 대한 시계열 분석

박수홍 ( Soo Hong Park ),선일석 ( Il Seok Sun ) 한국유통경영학회(구 한국유통정보학회) 2016 유통정보학회지 Vol.19 No.3

Purpose: With the environmental changes in clothing distribution, the domestic clothing distribution path has changed dramatically. To respond to it, an in-depth study is required to conduct the clothing distribution paths. Therefore, this study attempts to draw suggestions on overall clothing distribution paths by employing the time-series predictive analysis. Research design, data, and methodology: The main purpose of this study was to analyze and predict the relations of distribution paths by categorizing four clothing distribution paths, such as a department store, a large mart, a retail shop, and a non-store retailing. In order to examine the predictive analysis, the ARIMA model was used. In addition, the VAR model of Granger Causality Test was employed to investigate the causal relations regarding distribution paths. Results: After confirming the data stabilty by the ADF, each distribution path model was established by the Autocorrelation Coefficient and the Partial Autocorrelation Coefficient. The study results predicted the ARIMA model such as a department store ARIMA(1,0,0)(0,1,0)12, a large mart ARIMA(0,1,1)(0,1,0)12, a retail shop ARIMA(0,1,2)(0,1,0)12, and a non-store retailing ARIMA(1,1,0) (1,1,0)12, respectively. Conclusions: In conclusion, according to the predictive analysis, the overall sale index of four clothing distribution paths were influenced by the seasons. More specific, this study results indicated that a large mart and a non-store retailing increased the overall sale index; however, a retail shop showed a decreased sale index. Additionally, the total sale index of the department store was consistent, but fluctuated by the seasons. Additionally, the study results provided that most distribution paths were influenced by the seasons and impacted the total sale index each other, except a department store and a retail shop.

글로벌 환경 변화에 따른 내부마케팅 실증사례 연구

박수홍(Soo-Hong Park) 한국무역연구원 2010 무역연구 Vol.6 No.2

In resent years, though many areas have turned capital-intensive or technology-intensive, the service area has traditionally been labor-intensive. Since service cannot be separated from production and consumption, its quality is determined at the service encounter where clerks and customers encounter. Therefore, the attitudes, learning, and skills of clerks have a crucial influence on customers perceptions on the quality of service as well as on the creation of quality service. At this point, the roles of the members of an organization become crucial in creating values for customers. In this context, this research aims to prepare opportunities for new changes on the part of corporations in the marketing culture intended for internal customers. This research will focus on examining the existing definitions, functions, and purposes of internal marketing, extending the range of it, and finding out elements that affect internal marketing and the interactions between them. The model of the analysis is the Sung-Nam branch of S company. This analysis used questionnaires, which were answered by three hundreds of employees who work for the departments of management marketing and sales.

판토그라프 구조설계를 위한 기구해석 기법 개발

박수홍(Park Soo-Hong),김휘준(Kim Hwi-Jun),정경렬(Chung Kyung-Ryul),배정찬(Bae Jung-Chan) 한국철도학회 1999 한국철도학회 학술발표대회논문집 Vol.- No.-

Pantograph, which collects current from cartenary system, is one of important parts of high-speed train. Kinematic analysis is basic component of pantograph design. But kinematic analysis is very complex and time-consuming. Therefore numerical calculation of pantograph kinematics is necessary. In this study, pantograph kinematic analysis software was developed and relationship between kinematic parameters and pantograph performance was investigated. The software and relationship between kinematic parameters and pantograph performance are helpful to pantograph designers.

유아에서 발생한 선상 IgA 수포성 피부병

박수홍 ( Soo Hong Park ),정문철 ( Moon Cheol Jeong ),김계정 ( Kea Jeung Kim ),강형재 ( Hyung Jai Kang ) 대한피부과학회 1998 대한피부과학회지 Vol.36 No.2

Linear IgA bullous dermatoses(LABD) occurring in childhood is considered to be a childhood counterpart of LABD,rather than chronic bullous dermatosis of childhood. This disease characteristically involves the perioral area,lower trunk,pelvic region and the lower extremities. Immunopathologically,it is characterized by the linear deposits of IgA at the dermoepidermal junction of the perilesional skin. A 20-month-old female infant presented with multiple pruritic tense bullae on the face, lower trunk, both extremities and pelvic region of 2 weeks duration. She had no oral lesions or any specific signs or symptoms referable to the disease of the gastrointestinal tract. A skin biopsy revealed subepidermal blisters infiltrated with many neutrophils and a few eosinophils. Direct immunofluorescence demonstrated linear deposition of IgA at the dermoepidermal junction. An indirect immunofluorescence study using NaC1-split skin as the substrate revealed fluorescence for IgA in a linear pattern on the roof of the split at a titer of 1:40. The clinical diagnosis of LABD of childhood was confirmed and we started with a combined remedy of dapsone and corticosteroids; 10 weeks later almost all of the lesions had disappeared. (Korean J Dermatol 1998;36(2): 304-307)

공간다기준의사결정을 이용한 공시지가 비교표준지 자동선정

박수홍(Park soo hong),홍성언(Hong sung eon),김현석(Kim hyun suk),김정엽(Kim jung yeop) 대한공간정보학회 2003 한국지형공간정보학회 학술대회 Vol.2003 No.4