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박수용,송경주,정일두 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
In this study, PNIPAAm-grafted thermoresponsive hollow-polymeric-shell (HPS) particles with a connecting holes the outside were prepared from surface-modified colloidal silica (CS) with poly(ethylene glycol) methyl ether-3-(triethoxysilyl)propyl isocyanate (PEGME-IPTES) as templates. The PNIPAAm-grafted CS particles were prepared by modified silica with 3-(trimethoxysilyl) propyl methacrylate (MPS) and PEGME-IPTES by the polymerization of poly(N-isopropylacrylamide) (PNIPAAm), then the modified silica core with PEGME-IPTES on the surface were removed by etching with hydrofluoric acid. In order to confirm the LCST property of the HPS particles , the transition of transmittance and the change of particle diameter according to the temperature change were measured through UV-vis spectroscopy, DLS and microscope. In addition, the size and shape of the HPS particles were determined by TEM and SEM.
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박수용,윤석화,윤앤미선,송승현,황자경 대한마취통증의학회 2017 Korean Journal of Anesthesiology Vol.70 No.6
Background: Intraoperative hypothermia is common in patients undergoing general anesthesia during arthroscopic hip surgery. In the present study, we assessed the effect of heating and humidifying the airway with a heated wire humidification circuit (HHC) to attenuate the decrease of core temperature and prevent hypothermia in patients undergoing arthroscopic hip surgery under general anesthesia. Methods: Fifty-six patients scheduled for arthroscopic hip surgery were randomly assigned to either a control group using a breathing circuit connected with a heat and moisture exchanger (HME) (n = 28) or an HHC group using a heated wire humidification circuit (n = 28). The decrease in core temperature was measured from anesthetic induction and every 15 minutes thereafter using an esophageal stethoscope. Results: Decrease in core temperature from anesthetic induction to 120 minutes after induction was lower in the HHC group (−0.60 ± 0.27°C) compared to the control group (−0.86 ± 0.29°C) (P = 0.001). However, there was no statistically significant difference in the incidence of intraoperative hypothermia or the incidence of shivering in the postanesthetic care unit. Conclusions: The use of HHC may be considered as a method to attenuate intraoperative decrease in core temperature during arthroscopic hip surgery performed under general anesthesia and exceeding 2 hours in duration.
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중소기업의 학습조(CoP)활동이 조직성과에 미치는 영향
박수용,이동형 한국혁신산업학회 2024 혁신산업기술논문지 Vol.2 No.1
본 연구에서는 중소기업의 학습조 활동이 조직성과에 미치는 영향에 대해 학습조의 인적자원, 물적자원, 조직자원, 내부조직체계 등 4가지 요인을 회귀분석하였다. 분석 결과, 첫째, 학습조 활동은 조직성과에 유의미한 영향을 미치는 것으로 나타났다. 둘째, 인적자원 중 학습조 리더는 조직성과에 유의미한 영향을 미치는 것으로 나타났다. 셋째, 물적자원 중 학습조 활동에 대한 재정지원의 효과는 유의하지 않았으나, 학습시설과 운영지침은 유의미한 영향을 미쳤다. 넷째, 학습조 활동 조직지원의 효과는 전반적으로 유의미하였다. 특히, 조직 간 네트워킹은 조직성과에 매우 중요한 영향을 미치는 것으로 나타났다. 다섯째, 내부지원제도 중 회의제도가 중요한 것으로 나타났다. 결론적으로 중소기업에서 학습조 활동은 조직성과에 긍정적인 영향을 미쳐 기업을 성장시키는 중요한 요소의 하나이므로 활성화하여야 한다. 이를 위해서는 지원기관 및 해당 기업은 금전적 지원보다는 학습시설과 운영 지침을 마련하고, 조직 간 네트워킹의 기회를 제공하는 등 전략적 접근을 취해야 한다. 특히 기업의 학습동아리 운영 담당자는 조직의 규모에 맞는 HRD 역량 강화를 위한 체계구축 및 효율적 운영에 집중하여야 한다. In this study, we conducted a regression analysis of four factors, including the CoP(Community of Practice) human resources, material resources, organizational resources, and internal organizational system, on the impact of CoP activities in small and medium-sized enterprises on organizational performance. As a result of the analysis, first, CoP activities were found to have a significant impact on organizational performance. Second, among human resources, CoP leaders were found to have a significant impact on organizational performance. Third, among material resources, the effect of financial support on CoP group activities was not significant, but learning facilities and operating guidelines had a significant impact. Fourth, the overall effect of the CoP activity support organization was significant. In particular, inter-organizational networking was found to have a very important impact on organizational performance. Fifth, the meeting system was found to be important among the internal support systems. In conclusion, CoP activities in small and medium-sized enterprises should be activated as they have a positive impact on organizational performance and are one of the important factors in growing the company. To achieve this, support organizations and companies must take a strategic approach, such as providing learning facilities and operating guidelines and providing networking opportunities between organizations, rather than providing financial support. In particular, those in charge of running corporate CoP’s should focus on establishing a system and efficient operation to strengthen HRD capabilities appropriate for the size of the organization.
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박수용,최상현,김한샘,임재훈 대한건축학회지회연합회 2014 대한건축학회연합논문집 Vol.16 No.5
본 논문에서는 시간영역에서의 기울기 응답에 기반한 기존 손상탐지 방법의 적용성을 나타내었다. 제시한 방법은 시간영역에서의 구조물 응답을 직접 사용하기 때문에 모달 응답의 추출과정이 생략되며, 구조건전성 평가의 적용성을 개선시킬 수 있다. 손상탐지에 필요한 기울기 응답은 3축 가속도계로부터 얻을 수 있다. 가속도계는 선형가속도와 국부적인 중력장에 매우 민감하다. 본 논문에서는 3축 가속도계를 이용하여 기울기의 방향을 결정하는 식을 자세히 정리하였다. 손상부위를 탐지할 수 있는 손상지수는 손상이 없는 구조물과 손상이 있는 구조물의 기울기 응답으로부터 구한 변형에너지로 표현하였다. 구조물내의 손상가능 부위는 기존에 개발된 결정 룰을 이용한 손상 표시기에 의해 결정된다. 제시된 방법의 정확성과 실현 가능성은 수치해석과 실험에서 구한 데이터를 이용하여 입증하였다. This paper presents the applicability of the existing damage identification method based on slope responses to time-domain deflection shapes. Since the proposed method directly utilizes the time-domain responses of the structure, the extracting process for modal responses can be avoided, and the applicability of structural health evaluation can be enhanced. The slope responses to damage detection are extracted from the 3-axis accelerometer. Accelerometers are sensitive to both linear acceleration and the local gravitational field. This paper note documents the mathematics of orientation determination using a three-axis accelerometer. A damage index, utilized to identify possible location of damage, is expressed in terms of strain energy that can be obtained from the slope responses of the undamaged and the damaged structures. The possible damage locations in the structure are determined by the application of damage indicators according to previously developed decision rules. The accuracy and feasibility of the proposed method is demonstrated using numerical and experimental data.
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