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일부 치과위생사의 주관적 근무환경과 부위별 통증 자각증상
김한슬,곽정숙,홍진석 대한치과위생학회 2016 대한치과위생학회지 Vol.18 No.3
The purpose of this study is to understand relations between dental hygienists’ subjective work environment and subjective pain symptoms in different regions and improve the environment of their treatment room and help them reduce pain in different areas. The subjects of this study are 250 dental hygienists. Data were collected from March until April, 2015 through a survey with self-administered questionnaire sheets, and the results of analysis are as written below. 1. Concerning the subjects’ general characteristics, 98.4% were females. About their age, 64.0% were ‘from 20 to 29’, and about years of service, ‘many years of service (over 6 years)’ formed 4.08%. About types of hospitals they worked for, ‘dental clinic’ formed the most as 7.08%, and about the department they worked for, ‘operative and prosthetic dentistry’ formed the biggest part as 30.4%. 2. About the subjects’ subjective health conditions, ‘I am healthy’ formed the biggest part as 39.6%, and about the areas of subjective pain, pain was felt the most in their neck as 19.4%, shoulders as 19.0%, waist as 17.5%, and legs as 16.3% in order. About ways to prevent or cure pain, ‘resting’ formed 33.2% and ‘no experience of being treated’ formed 21.6%, and about the degree of resting while working, ‘I rest sometimes’ formed 62.0%. 3. Regarding their subjective work environment, ‘physical environment’ received a low point as 2.89±0.51. About detailed items, they regarded their physical environment to be not very favorable giving low points to ‘There is little noise.’, ‘The treatment room is quite well equipped with ventilation facilities (windows or ventilators).’, and ‘An extra chair is equipped to each of the chair on the treatment room.’ in order. 4. Concerning their subjective pain symptoms in different regions, muscle symptoms received the lowest point as 2.40±0.78. About detailed items, ‘My shoulders are painful or uncomfortable.’ gained 2.20±0.92 points, and ‘My lower limbs (legs, knees, or feet) are painful or uncomfortable.’ received 2.37±1.00 points, and ‘My lumbar region (waist or back) is painful or uncomfortable.’ gained a low point as 2.38±0.97. 5. Regarding their subjective work environment and subjective pain symptoms in relation to general characteristics, there was no significant difference by years of service. About types of hospitals they worked for, dental clinics gained low points in ‘physical environment’, ‘the job system and environment’, and ‘muscle symptoms’, which indicated significant difference (p<0.05). About the degree of resting while working, ‘I hardly rest.’ was found to be low in ‘job environment and duties’, ‘skin symptoms’, ‘muscle symptoms’, and ‘psychological symptoms’, which indicated significant difference (p<0.05).
산소 환원 반응을 위한 탄소기반 Pt-Cu 합금의 높은 전기적 촉매 활성
김한슬,류수착,이영욱,신태호 한국수소및신에너지학회 2019 한국수소 및 신에너지학회논문집 Vol.30 No.6
Electrocatalysis of oxygen reduction reaction (ORR) using Pt nanoparticles or bimetal on carabon was studied. Currently, the best catalyst is platinum, which is a limited resource and expensive to commercialize. In this paper, we investigated the cheaper and more active electrocatalysts by making Pt nanoparticles and adding 3D transition metal such as copper. Electrocatalysts were obtained by chemical reduction based on ethylene glycol solutions. Elemental analysis and particle size were confirmed by XRD and TEM. The electrochemical surface area (ECSA) and activity of the catalyst were determined by electrochemical techniques such as cyclic voltammetry and linear sweep voltammetry method. The commercialized Pt support on carbon (Pt/C, JM), synthesis Pt/C and synthesis Pt3Cu1 alloy nanoparticles supported on carbon were compared. We confirmed that the synthesized Pt3-Cu1/C has high electrochemical performance than commercial Pt/C. It is expected to develop an electrocatalyst with high activity at low price by increasing the oxygen reduction reaction rate of the fuel cell.
이미지 평가 기법을 활용한 철재 시편의 디지털 방사선 영상시스템(Computed Radiography) 이미지 해석 연구
김한슬,김다솔,송정일 한국문화재보존과학회 2022 보존과학회지 Vol.38 No.5
In the non-destructive radiographic testing methods used for specimens with cultural heritage, analog film radiography is being replaced with digital radiography by the introduction of an imaging plate computed radiography system. Adoption of the computed radiography system has helped standardize digital image quality. This study analyzed the X-ray transmission characteristics and evaluated image quality according to image developing time for iron, the most important metal in cultural heritage. Computed radiography images were acquired. The transmittance of the images was determined based on Gray Scale and Duplex-wire Image Quality Indicator data. In addition, the change in images with the image developing time was compared and analyzed using the Structural Similarity Index Measure, mean square error, and peak signal-to-noise ratio.
임파워링 리더십이 대기업 근로자의 재직 의도에 미치는 영향: 잡 크래프팅의 매개효과와 지각된 과잉자격의 조절된 매개효과
김한슬,이윤수 한국기업교육학회 2023 기업교육과인재연구 Vol.25 No.2
본 연구는 임파워링 리더십과 조직 구성원의 재직 의도의 관계에서 잡 크래프팅(과업 크래프팅, 인지 크래프팅, 관계 크래프팅)의 매개효과와 지각된 과잉자격의 조절된 매개효과를 분석하는 데 목적이 있다. 이를 위해 국내 대기업 재직자를 대상으로 설문조사를 실시하였으며, 총 325개의 자료를 분석하였다. 연구 결과는 다음과 같다. 첫째, 임파워링 리더십은 조직 구성원의 재직 의도와 정(+)적 관계가 있었다. 둘째, 인지 크래프팅은 임파워링 리더십과 재직 의도의 관계를 매개하였다. 셋째, 지각된 과잉자격은 임파워링 리더십과 재직 의도 간의 관계를 조절하였다. 넷째, 임파워링 리더십과 재직 의도의 관계에서 과업 크래프팅과 관계 크래프팅의 매개효과는 지각된 과잉자격에 의해 조절되었다. 연구 결과를 바탕으로 조직 구성원의 재직 의도를 향상시켜 줄 수 있는 조직 내 방안 및 정책에 관한 시사점을 제시하였고, 후속 연구를 위한 제언을 논의하였다