SPAD 센서/검출기를 위한 퀜칭 및 리차지 회로

박효성(Hyo-Sung Park),최우영(Woo-Young Choi),이명재(Myung-Jae Lee) 대한전자공학회 2021 대한전자공학회 학술대회 Vol.2021 No.6

Finite Control Set Model Predictive Control with Pulse Width Modulation for Torque Control of EV Induction Motors

Hyo-Sung Park(박효성),Byung-Kwon Koh(고병권),Young-il Lee(이영일) 대한전기학회 2016 전기학회논문지 Vol.65 No.12

This paper proposes a new finite control set-model predictive control (FCS-MPC) method for induction motors. In the method, the reference state that satisfies the given torque and rotor flux requirements is derived. Cost indices for the FCS-MPC are defined using the state tracking error, and a linear matrix inequality is formulated to obtain a proper weighting matrix for the state tracking error. The on-line procedure of the proposed FCS-MPC comprises of two steps: select the output voltage vector of the two level inverter minimizing the cost index and compute the optimal modulation factor of the minimizing output voltage vector in order to reduce the state tracking error and torque ripple. The steady state tracking error is removed by using an integrator to adjust the reference state. The simulation and experimental results demonstrated that the proposed FCS-MPC shows good torque, rotor flux control performances at different rotating speeds.

고속철도 열차 증속에 따른 접속부 거동특성 분석

박효성(Hyo-Sung Park),김낙석(Nak-Seok Kim),강윤석(Yun-Suk Kang) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10

As we see the continuation of the increase in the speed of the High Speed railroad worldwide there is a concern for a possible problem in the connecting transition zone in the railway infrastructure. Honam High Speed railroad's transition zone in the hub for the rotation structures and other supporting structures such as approach slab sub slab approach block etc. Due to its increase in speed of the design speed and its important role on the driving stability and credibility of the bearing ground performance we must seek and fine a prevention plan for a cause of differential settlement as well as the cause of the derailment. In this dissertation domestic as well as international design manuals and the applicability of the control standards are studied. Also through the study target Honam High Speed railroad zone 4-1 we evaluated the connecting componant of the Yeon-Jeong bridge through the eigenvalue and weight transfer of the train when operated at 300km/h 350km/h 400km/h 450km/h and were able to achieve detailed assessment by checking track behaviors looking at various components such as the rotation acceleration according to the inversion of the distance length displace length displacement and stress distribution. Through these studied possibility of operating at 400km/h was evaluated based on the condition of the current design basis.

호텔 종사원의 삶의 질이 직무만족에 미치는 영향 - 직업소명의식의 조절효과를 중심으로 -

박효성 ( Park Hyo Sung ),박희영 ( Park Heui Young ),차성민 ( Cha Sung Min ),손애화 ( Son Ai Hua ) 한국호텔리조트학회(구 한국호텔리조트카지노산학학회) 2016 호텔리조트연구 Vol.15 No.3

This study has the objective of providing basic data to contribute to the magnification of the corporate profit eventually by lowering the turnover rates of the corporation and inducing long service, by comprehending the effect relationship of the quality of life of the hotel employees on the professional vocation awareness and job satisfaction, improving quality of personal life of hoteliers and enhancing the job satisfaction. This study has investigated on the effect relationship between the quality of life of hoteliers and job satisfaction and if the professional vocation awareness shows regulation effect between the two variables based on the theoretical background about quality of life, professional vocation awareness and job satisfaction of the hotel employees and result of the precedent studies. The purpose of this study is to improve the quality of life of hotel employees and establish improvement directions for job satisfaction. A study model was deducted and the hypothesis was verified through a practical study. A total of 8 hypothesis were verified after reviewing the reliability and validity of the study model based on the 330 specimen procured to perform the practical study. And according to the result, it was shown that the sub-factors of quality of life, the quality of psychological life and quality of economical life affect positively the internal job satisfaction and external job satisfaction and that the professional vocation awareness has regulation effect between the two variables, life of psychological life and internal job satisfaction.

얼굴마비 환자의 의·한의 협진 의료이용 연구: 건강보험심사평가원 환자표본 데이터를 이용

박효성,엄태웅,김남권,Park, Hyo Sung,Uhm, Tae Woong,Kim, Nam Kwen 한국데이터정보과학회 2017 한국데이터정보과학회지 Vol.28 No.1

The facial palsy is one of the most common illness in Western-Korean collaborative treatment (hereinafter "collaborative treatment"). The purpose of this study is to analyze facial palsy patients'collaborative treatment use patterns. By analysing the 2014 National Health Insurance Review and Assessment Patient Sample Data (NPS 2014) with the episode of care unit, we have found the following results. First, the collaborative treatment is preferred by patients over 50 years old and female. Second, western medicine mainly focuses on diagnosis and medical examination while korean medicine and collaborative treatment focus more on treatment activity. Third, western medicine showed the shortest treatment period, followed by korean medicine and collaborative treatment. However, the cost of medical treatment per day is highest in western medicine. The analysis of the use patterns of collaborative treatment shown in the study is expected to provide a direction for the development of clinical practice guidelines and the establishment of medical policies in the future. 본 연구는 의 한의 협진 진료의 발생 빈도가 높은 질환인 얼굴마비에 대하여, 2014년도 건강보험심사평가원 환자표본 자료 (HIRA-NPS, 2014)를 이용해서 진료 에피소드 단위의 분석을 시행하였다. 건강보험 급여 청구현황에 근거한 진료 에피소드 단위 분석결과, 의 한의 협진 빈도는 남성보다 여성에서 높은 것으로 나타났으며, 연령대는 50세 이상이 높은 것으로 나타났다. 얼굴마비 환자들에서 확인된 의료이용 패턴은 의과 단독 진료 군의 경우 진단 및 검사가 다 빈도로 확인되었으며, 한의과 단독 진료와 의 한의 협진 진료 군의 경우는 치료 항목들이 다 빈도로 나타났다. 치료 행태별 요양일수는 의 한의 협진, 한의과 단독 진료, 의과 단독진료 등의 순으로 다 빈도가 확인되었으며, 내원일당 요양급여 비용은 의과 단독 진료, 의 한의 협진, 한의과 단독 진료 등의 순으로 높게 나타났다. 본 연구에서 추정된 의 한의 협진 의료이용 행태는 향후 본 질환의 임상진료지침 개발과 의료 정책의 수립에 방향성을 제시할 수 있을 것으로 사료된다.

해양도시내 분산전원의 최적 설치점 선정

성효성(Hyo-Seong Seong),장낙원(Nakwon Jang),박정도(Jeong-Do Park),이성환(Sung-Hwan Lee),도근영(Geun-Young Doe),이정재(Jurng-jae Yee) 한국항해항만학회 2009 한국항해항만학회 학술대회논문집 Vol.2009 No.공동학술

분산발전원의 위치 변경에 따른 전력조류 및 송전전력 손실 평가를 통하여 도시차원에 적합한 발전원 설치점 선정 기법의 개발이 시급하다. 본 연구에서는 전력손실을 고려하여, 분산전원이 주변의 모선 및 선로에 미치는 영향을 최소화 할 수 있도록, 분산전원의 설치지점을 선정하는 방안을 제안한다. In this paper we developed positioning algorithm considering distributed energy resource of ocean side by load flow calculation using Newton-Rhapson method.

책임감리가 건설사업관리(CM)로 전환시 도입된 역량지수(ICEC)에 대한 도로건설기술자들의 인식 분석(I) - 역량지수 등급 체계를 중심으로 -

박효성,김낙석,Park, Hyo-Sung,Kim, Nak-Seok 대한토목학회 2015 대한토목학회논문집 Vol.35 No.5

The result of responsibility supervision system which has been enforced for the last twenty (20) years since January, 1994 is evaluated, and keeps an eye out the process of unification and absorption of the system into the construction management (CM). As a baseline data for this study, the grade framework of construction engineer's ICEC introduced with CM is summarized. In this manuscript, the questionaire survey for CM and ICEC was conducted toward the target group of road field construction engineers and analyzed the outcome of the respondents' answers. 50% of the respondents have answered positively for the question about converting responsibility supervision to CM. 48% of the respondents from construction works field have answered positively for converting responsibility supervision system to CM while 38% of the respondents from engineers of supervision field have answered positively, less positive than the answers from works field engineers. 46% of overall respondents have answered, however, to maintain the present system of 40%, 40% and 20% on the survey to the question asking the opinion on the ways of calculating ICEC to use the rates : 40% of career, 40% of qualification and 20% of academic achievements. However, it appeared that engineers who have comparative advantages with academic achievements and career, and engineers with lower grade qualification demanded higher rate for career. 1994.1월 도입된 책임감리제도의 20년 시행 결과를 평가하고, 이 제도가 건설사업관리(CM)에 흡수 통합된 과정을 살펴보았다. 본 연구의 기초자료로서 건설사업관리와 함께 도입된 건설기술자 역량지수(ICEC) 등급 체계를 요약했다. 본 연구에는 도로분야 건설기술자들을 대상으로 건설사업관리와 역량지수에 대한 설문조사를 실시하고 그 응답자의 반응을 분석한 결과를 수록했다. "책임감리가 건설사업관리로 전환된 점에 대한 의견"을 묻는 설문에 응답자의 50%가 CM으로 전환되어야 한다고 답했다. CM으로 전환되어야 한다고 응답한 시공분야 기술자는 48%인 반면, 감리분야 기술자는 38%로 낮았다. "역량지수를 경력 40%, 자격 40%, 학력 20% 비율로 산정하는 방안에 대한 의견"을 묻는 질문에 '현행과 같은 40%, 40%, 20%가 적정하다'는 응답이 46%였다. 그러나 학 경력자와 등급이 낮은 자격의 기술자들이 경력 비율을 높이라고 요구한 것으로 나타났다.

책임감리가 건설사업관리(CM)로 전환시 도입된 역량지수(ICEC)에 대한 도로건설기술자들의 인식 분석(II) - CM 용어와 ICEC 조정을 중심으로 -

박효성,김낙석,Park, Hyo-Sung,Kim, Nak-Seok 대한토목학회 2015 대한토목학회논문집 Vol.35 No.6

본 연구(II)에서는 전 연구(I) 수행과정에 직무교육 훈련을 받고 있는 도로분야 건설기술자들이 질의했던 현안사항에 대하여 추가로 설문조사를 실시하고, 그 결과를 분석하여 미래지향적인 건설정책 대안을 도출하였다. "건설사업관리(CM) 용어가 2가지로 분리된 점에 대한 의견"을 묻는 질문에 응답자의 45%가 선진외국과 같이 '건설사업관리'로 단일화하자고 답했다. "CM전문가 육성 방안"에는 많은 응답자들이 민간교육기관에서 일정기간의 교육을 수료하면 CM전문가 자격을 얻을 수 있는 방안을 선호하였다. "설계 시공 및 품질관리 특급기술자의 역량지수(ICEC) 등급을 75점 이상에서 78점 이상으로 상향 조정(안)" 질문에는 '당초(안)처럼 75점 이상으로 하자'가 52%였다. "CM제도의 적용이 아직도 활성화되지 못하고 있는 이유"에는 응답자의 62%가 공공건설사업 발주기관 담당자들의 CM도입 의지가 부족하기 때문이라고 답했다. 건설사업의 아웃소싱을 기반으로 하는 CM제도의 활성화를 위해서는 국토교통부 본부의 조직 개편 방안이 선행되어야 한다. This study (II) aims to draw up the future-oriented construction policy recommendations based on the outcomes as a result of a broad research and conducting questionnaire surveys on the arguable issues raised by construction engineers for roads and bridges in the course of previous study (I) implementation. As for the question of "The term 'Construction Management (CM)' which currently is defined in two (2) ways", 45% of respondents have answered that two (2) different types of CM should be unified into one (1) CM type as is the case in most advanced countries. About the question of "The ways to educate the CM professionals", many respondents have preferred to acquire CM professional certificate after receiving education for a certain period of time from private CM training institutions. As for the question of The revised draft that the ICEC grade of special engineers for design, construction and quality control areas shall be "more than 78 points from a more than 75 points by the original draft." 52% of respondents preferred to maintain the original draft. About the question of "The reason why the CM system has not been working well yet." 62% of respondents have answered that the staff members who are in charge of handling public project procurements are concerned about the fact that their roles (or activities) might be deprived as a result of CM adoption. In order for the CM system to be activated, based on the notion that the construction projects must be out soured, the reshuffle of the headquarter organization of Ministry of Land, Infrastructure and Transportation (MLIT) should be preceded.

호텔조리사의 HACCP제품사용, 직무만족, 조직몰입 및 조직성과의 관계 -국내 특1급 호텔을 중심으로-

이준혁 ( Lee Jun Hyuk ),박효성 ( Park Hyo-sung ),박헌진 ( Park Heon Jin ) 경남대학교 산업경영연구소 2015 지역산업연구 Vol.38 No.3

본 연구는 특1급 호텔조리사들의 HACCP제품사용이 직무만족, 조직몰입 및 조직성과에 미치는 영향과 각 구성요인들 간의 관계를 파악하고자 하였다. 유의한 204부의 설문지를 통해 실증분석을 시도하였으며, 탐색적요인분석과 신뢰도분석을 통해 특1급호텔 조리사들의 HACCP제품사용, 직무만족, 조직몰입, 및 조직성과의 요인이 도출되었다. HACCP제품사용에 관한 속성들은 가금류, 해산물, 야채류, 양념류, 레토르트제품, 고기류, 육가공제품, 유가공제품 등으로 분류하였다. 분석결과 특1급호텔 조리사들의 HACCP제품사용은 직무만족, 조직몰입 및 조직성과에 부분적으로 유의한 영향을 미치는 것으로 나타났다. 또한 직무만족은 조직몰입에 유의한 영향을 미치는 것으로 나타났다. 그러나 조직몰입은 조직성과에 영향을 미치지 않으며, 직무만족은 조직성과에 유의한 영향을 미치는 것으로 나타났다. 특히 양념류의 HACCP제품들은 직무만족, 조직몰입, 및 조직성과에 부(-)의 영향을 미치고 있는 것으로 나타났는데 이것은 인터뷰조사결과 특1급호텔 조리사들이 기존 양념류의 사용에 익숙해 있기 때문인 것으로 밝혀졌다. 그러므로 특1급호텔 조리부서의 관리자들은 조리사들의 직무만족, 조직몰입 및 조직성과 향상을 위해 HACCP제품에 대한 사용을 제고해 나가야 할 것이다. 마지막으로 본 연구의 시사점 및 한계점에 대하여 논하였다. This study was aimed for the identification of relationship of deluxe hotel cooks' HACCP product use, job satisfaction, organizational commitment, and organizational performance. Based on valid 204 questionnaires, empirical analyses were conducted by SPSS 18.0. Through the exploratory factor analysis and reliability analysis, deluxe hotel cooks' HACCP product use, job satisfaction, organizational commitment, and organizational performance factors were identified. The HACCP product use attributes were classified with poultry, sea food, vegetable, condiment, retort, meat, processed meat products, processed milk products according to HACCP product usage. The results show that hotel cooks' HACCP product use has a significant effect on job satisfaction, organizational commitment, and organizational performance partially. Also, deluxe hotel cooks' job satisfaction has an influence on organizational commitment. However, organizational commitment did not have an effect on organizational performance. Deluxe hotel cooks' job satisfaction also influenced on the organizational performance. Especially, condiment HACCP product use has a negative relationship with job satisfaction, organizational commitment and organizational performance. Through the interview with cooks in deluxe hotel, the reason was that the cooks were accustomed to old condiment usage not using HACCP. Therefore the management of deluxe hotel should reinforce the use of HACCP product for the satisfaction of cooks, organizational commitment and organizational performance. Finally, the study closes with a discussion of our contributions and implications for theory and practice, limitations, and suggestions for future research.

Aster tataricus 물 추출물의 mitogen-activated protein kinase 신호 전달 경로를 통한 면역 조절 효과

이채연(Chea Yeon Lee),박효성(Hyo Sung Park),공덕훈(Deok-Hoon Kong),김영관(Young Kwan Kim),조화정(Whajung Cho) 한국영양학회 2020 Journal of Nutrition and Health Vol.53 No.5

본 연구는 AT의 뿌리를 제외한 전체 AT의 에탄올 및 물 추출물의 면역 조절 효과를 비교하고 THP-1의 cytokine 분비를 조절하는 분자 메커니즘을 조사하였다. AT의 물 추출물 및 에탄올 추출물은 THP-1 세포에 독성이 없으며 세포 증식을 증가키는 것을 확인하였다. 에탄올 추출물은 영향이 없는데 반해, 물 추출물은 THP-1의 IL-1β의 분비를 증가시켰으며 COX-2 및 iNOS 단백질의 발현을 증가시켰다. 또한, MAPK 및 Akt의 인산화와 IkBα의 분해를 유도하는 것을 확인하였다. AT에 의한 IL-1β 분비는 ERK 및 JNK 억제제에 의해 감소되었으며, TNF-α의 분비는 ERK, p38 MAPK 및 JNK 억제제에 의해 감소되었다. 흥미롭게도, p38 MAPK 억제제는 AT에 의한 IL-1β의 생성을 추가로 증가시켰다. 이 결과는 AT 지상부의 물 추출물에 MAPK 신호 전달 경로를 통해 면역 세포를 자극하여 cytokine의 생산을 유도하는 생리활성물질이 존재한다는 것을 의미한다. 따라서, AT 지상부는 면역력 강화제의 천연 소재로써 이용될 수 있을 것으로 사료된다. Purpose: Aster tataricus (AT) is one of the Asteraceae perennial herbs used in traditional Chinese medicine. The herb contains various bioactive substances, such as flavonoids, isoflavonoids, and phenolic compounds in the roots, and exhibits a range of effects including anti-bacterial, anti-oxidant, and anti-inflammatory activities. This study compared the immunomodulatory effects of ethanol and water extracts of whole AT, except the roots, and analyzed the molecular mechanisms for the regulatory effects on cytokine secretion from THP-1 cells. Methods: The effects of AT extract on the cell viability and proliferation of THP-1 cells were analyzed using the Cell Counting Kit-8 method. The concentrations of interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF-α) in the cell culture supernatant of the AT-treated THP-1 cells were measured using an enzyme-linked immunosorbent assay. The protein levels of cyclooxygenase-2 (COX-2), inducible nitric oxide synthase (iNOS), inhibitor of nuclear factor kappa B (IκBα), and mitogen-activated protein kinase (MAPK) phosphorylation in the cell lysates were determined by western blotting. Results: The water extract and the ethanol extract of AT did not affect the cell viability, and increased the proliferation of THP-1 cells significantly compared to the vehicle. The water extract increased the secretion of IL-1β from THP-1 cells in a dose-dependent manner, but the ethanol extract had no effect. The expression of COX-2 and iNOS protein and the phosphorylation of MAPK and Akt were induced in AT-treated cells. In addition, IκBα was degraded by AT in a concentration-dependent manner. IL-1β secretion by AT was reduced by extracellular-signal-regulated kinase (ERK) and c-Jun N-terminal kinase (JNK) inhibitors, while TNF-α secretion was decreased by inhibitors of ERK, p38 MAPK, and JNK. Interestingly, the p38 MAPK inhibitor increased the production of IL-1β by AT further. Conclusion: The water extract of the above-ground parts of AT contains immunomodulatory bioactive substances that stimulate immune cells through the MAPK signaling pathway.