연구발표논문초록 ( 촉매 / 반응공학 (7) ) : 에탄올로부터 1 , 3 - butadiene 의 생성에 관한 Ta2O5 / SiO2 - Mgo 의 촉매특성

박진화 (학),서성규 (정),김재승 (정) ( Jin Hwa Park,Seong Gyu Seo,Jae Seung Kim ) 한국화학공학회 1989 추계학술발표회 Vol.- No.-

플라스틱 표면의 표면거칠기에 따른 손가락 마찰특성

박진화(J.H. Park),김승택(S.T. Kim),오창열(C.Y. Oh),우제용(J.Y. Woo),이영제(Y.Z. Lee) 한국트라이볼로지학회 2014 한국트라이볼로지학회 학술대회 Vol.2014 No.10

탄점소성 다결정 모델을 활용한 삼축성 예측 및 검증

박진화,정영웅 대한금속·재료학회 2022 대한금속·재료학회지 Vol.60 No.8

The ΔEVPSC numerical code based on the elasto-visco-plastic HEM (Homogeneous Effective Medium) provides a multiscale constitutive modeling framework that is suitable for describing a wide range of mechanical behaviors of polycrystalline metals. In this study, an AA6061-T6 aluminum sample was chosen to validate the predictive capability of the ΔEVPSC stand-alone (ΔEVPSC-SA) code on stress triaxiality and its evolution until fracture. The model parameters were calibrated by fitting the uniaxial flow stress-strain curve, and the initial crystallographic orientation distribution (COD) was obtained using X-ray diffraction and electron backscattered diffraction (EBSD) methods. The statistical representativeness of the COD was further examined by comparing the experimental R-values with model predictions based on a set of CODs obtained via the two mentioned diffraction methods. The results suggest that the X-ray scan does not represent the texture very well, and instead, an entire cross-sectional EBSD scan is required, even though the texture gradient along the through-thickness direction is not very significant. The model-calculated triaxiality based on the ΔEVPSC-SA code was verified by comparison with the experimental results from the uniaxial tension, the notched tension, and the plane strain tests. The results were in good agreement with the ΔEVPSC finite element (FE) simulation results and other similar experimental results reported in the literature.

Photocatalytic Synthesis of β-Sulfonated Cyclopentanones via Sulfonylation and Semipinacol-type Rearrangement Cascades of Vinyl Cyclobutanols

박진화,김대영 대한화학회 2019 Bulletin of the Korean Chemical Society Vol.40 No.12

Photocatalytic radical sulfonylation and semipinacol-type rearrangement of alkenyl alcohols.

독일여성의 연금수급권 변화 연구: 유족연금, 분할연금, 양육크레딧을 중심으로

박진화 인문사회 21 2019 인문사회 21 Vol.10 No.1

본 연구는 독일여성의 연금수급권 변화를 살펴보고 우리나라 여성의 연금수급권에 대한 시사점을 찾고자 하는 것을 목적으로 문헌연구를 하였다. 분석결과는 다음과 같다. 첫째, 독일의 유족연금 수급권에는 유족연금 외에 별도의 아동양육 가산점 제도가 도입되었다. 둘째, 분할연금 수급권에는 혼인기간에 대한 제한 규정이 없으며, 이혼한 경우 외에 결혼생활 중에도 부부의 연금가입 경력을 합산하여 균등하게 분할할 수 있도록 하였고, 또한 65세 이전에 배우자가 사망할 경우 유족연금 대신 연금분할을 신청할 수 있게 하였다. 셋째, 양육크레딧 수급권에는 한 자녀 당 3년의 인정기간 외에 모성휴가기간 동안의 14주도 크레딧으로 인정되었다. 이러한 분석결과는 우리나라 여성의 연금수급권 강화 방안에 대한 정책적 시사점을 준다. The purpose of this study was conducted to examine changes in the pension rights of German women and to find implications for Korean women's pension rights. The analysis results are as follows. First, in addition to the survivor's pension, there was a separate child care subsidy system in the survivor‘s pension in Germany. Second, there were no restrictions on the minimum age of marriage in the rights to a split pension, and in addition to divorce, it was allowed to divide the couple's pension subscription experience equally during marriage. In addition, there was a regulation that allows a spouse to apply for a pension division instead of a survivor's pension if a spouse dies before the age of 65. Third, in addition to the three- year recognition period for each child, 14 weeks of maternity leave were also recognized as childcare credits. The results of the analysis give a policy implications on how to strengthen the nation's women's pension rights.

Antioxidant and Antimicrobial Activities of Quinoa (Chenopodium quinoa Willd.) Seeds Cultivated in Korea

박진화,이윤진,김연호,윤기선 한국식품영양과학회 2017 Preventive Nutrition and Food Science Vol.22 No.3

The objective of this study was to investigate the antioxidant and antimicrobial properties of quinoa cultivated in Korea and to compare it with imported quinoa from the USA and Peru. The highest amount of total flavonoid contents (TFC) with 20.91 mg quercetin equivalents/100 g was measured in quinoa seed extract cultivated in Korea, while the total phenolic contents (TPC) were significantly higher in quinoa from the USA (16.28 mg gallic acid equivalents/100 g). In addition, quinoa extracts cultivated in Korea displayed a superior antioxidant ability in both, ferric reducing antioxidant power and 1,1-diphenyl-2-picrylhydrazyl values. There was a high correlation between TFC and antioxidant activity and a low correlation between TPC and antioxidant activity. The antimicrobial activity of the quinoa extracts was determined using a disc diffusion assay and optical density method. In both assays, the quinoa seed extracts did not have strong antimicrobial activity against foodborne bacteria, including Staphylococcus aureus, Listeria monocytogenes, Bacillus cereus, Escherichia coli, Salmonella Typhimurium, and Campylobacter jejuni.

종합병원 간호사의 업무몰입 관련요인

박진화(Jin-Hwa Park),이은경(Eun-Kyung Lee),김선희(Sun-Hee Kim) 한국산학기술학회 2018 한국산학기술학회논문지 Vol.19 No.12

본 연구는 종합병원 간호사의 업무몰입 관련 요인을 파악하고자 실시한 서술적 조사연구이다. 연구의 대상자는 D광 역시와 K지역에 위치한 3개의 종합병원에 재직하고 있는 114명의 간호사이다. 수집된 자료는 IBM SPSS Statistics 25 프로그램을 사용하여 descriptive statistics, t-test, one-way ANOVA, Pearson"s correlations, stepwise multiple regression으로 분석하였다. 본 연구에서 업무몰입의 평균평점은 3.08점이었으며, 감정노동 하부요인 중 전문직 감정조절 노력은 3.82점, 대상자 중심 감정 억제는 3.28점, 규범에 의한 감정 가장은 3.22점이었으며 간호근무환경은 2.59점이었다. 업무몰입은 감정노동 하부요인 중 전문직 감정조절 노력(r=.30, p=.001), 대상자 중심 감정 억제(r=.20, p=.030)와 유의한 양의 상관관계를 보였고, 간호근무환경과도 유의한 양의 상관관계(r=.21, p=.024)가 있는 것으로 나타났다. 업무몰입은 연령, 직위, 전문직 감정조절 노력과 관계가 있었으며 이들 세 변수는 업무몰입을 20%(F=10.37, p<.001)설명하였다. 따라서 업무몰입 향상을 위한 전략 수립 시 연령과 직위를 고려해야 하며, 감정노동이 발생할 수 있는 상황에서 전문직 감정조절 노력을 강화할 수 있는 전략을 찾는 노력이 이어져야 할 것이다. This descriptive survey was conducted to explore the effects of work engagement and its associated factors among general hospital nurses. Nurses working in general hospitals were recruited in D city and K region. Data were analyzed by descriptive statistics, t-test, one-way ANOVA, Pearson"s correlations, and stepwise multiple regression using IBM SPSS 25. The mean score of work engagement of the subjects was 3.08. The mean scores of emotional modulation effects in profession, patient focused emotional suppression, and emotional pretense by norms which are subgroups of emotional labor by norms were 3.82, 3.28, and 3.22, respectively, while that of the nursing work environment was 2.59. Work engagement was significantly positively correlated with emotional modulation effects in profession (r=0.30, p=0.001), patient-focused emotional suppression (r=0.20, p=0.030), and nursing work environment (r=0.21, p=0.024). The results showed that the factors that affect the work engagement were age, current position, and emotional modulation effects in profession, which explained 20% of the variance in work engagement (F=10.37, p<0.001). Therefore, to establish strategies for improving the level of work engagement, it is necessary to consider age and current positions of nurses and to develop a nursing intervention program to strengthen emotional modulation effects among general hospital nurses.

시비처리에 따른 소나무의 내건성 반응특성 연구

박진화,이도형 경상대학교 농업생명과학연구원 2020 농업생명과학연구 Vol.54 No.2

본 연구는 소나무 2-0 용기묘를 대상으로 시비처리에 따른 생장변화와 시비처리 후 단수처리에 따른 생리활성 측정을 통해 내건성 증진을 위한 적정시비 방안을 수립하여 건강한 묘목 생산을 위한 기초자료를 제공하고자 수행되었다. 시비처리에 따른 소나무 묘목은 중도(2.0g/ℓ)의 시비구에서 가장 높은 묘고 생장량(12.34±0.73㎝)을 나타냈으며 근원경 생장은 약도(1.0g/ℓ)의 시비구에서 가장 높은 생장량(5.77±0.20㎜)을 나타냈다. 묘목의 품질을 평가하는 종합적 지수인 묘목품질지수(SQI)는 약도(1.0g/ℓ)의 시비구에서 2.05±0.07로 가장 높게 나타났으며, 중도(2.0g/ ℓ)의 시비처리구에서는 1.90±0.09의 값을 보였다. 전체 엽록소 함량은 시비 농도가 높아짐에 따라 증가하는 경향을 보였고 강도(3.0g/ℓ)의 시비구에 서 22.50±0.28㎎/g으로 가장 높게 나타났다. 단수처리에 따른 시비구별 소나무 묘목의 아브시스산 함량은 엽 피해가 발생한 강도(3.0g/ℓ)의 시비구를 제외하면 중도(2.0g/ℓ)의 시비구에서 2,190.85ng/g로 가장 낮게 나타났고, 전체 엽록소 함량은 중도(2.0g/ℓ)의 시비구에서 건조스트레스에 따른 엽록소의 파괴가 거의 없이, 단수처리 기간 동안 꾸준히 가장 높은 엽록소 함량 값(21.20±0.20㎎/g)을 나타냈다. 공시 수종인 소나무는 중도(2.0g/ℓ) 의 시비구에서 건조스트레스에 따른 아브시스산의 함량이 가장 적고, 엽록소의 함량은 가장 높게 나타나 소나무의 내건성 증진을 위한 적정 시비수준 은 중도(2.0g/ℓ)라고 판단된다. The main aim of this study is first to measure changes in the growth of 2-year-old Pinus densiflora containerized seedlings as influenced by fertilizer treatments and water supply cut-off proxy of drought resistance, second to establish a proper fertilization plan for the promotion of drought resistance, and finally to provide basic data for healthy seeding production. For the fertilization treatments, the height growth of P. densiflora seedlings was 12.34±0.73cm at an intermediate (2.0g/ℓ) fertilizer treatment, while the diameter growth of root collar was 5.77±0.20mm at a weak (1.0g/ℓ) fertilizer treatment. The highest seedling quality index of 2.05±0.07 was shown at a weak (1.0g/ℓ) fertilizer treatment. The total chlorophyll content increased as the fertilizer concentration increased, and the highest total chlorophyll content of 22.50±0.28 ㎎/g was observed at a strong (3.0g/ℓ) fertilizer treatment and fallowed total chlorophyll content of 1.90±0.09 ㎎/g was found at an intermediate (2.0g/ℓ) fertilizer treatment. For the abscisic acid content of P. densiflora seedlings for each fertilizer treatment during water supply cut-off, the lowest abscisic acid content of 2,190.85ng/g was found at an intermediate (2.0g/ℓ) fertilizer treatment. Exceptionally, seedlings with strong (3.0g/ℓ) fertilizer treatment showed poor growth evident by damaged leaves. Besides, the highest total chlorophyll content of (21.20±0.20㎎/g) was found at an intermediate (2.0g/ℓ) fertilizer treatment constantly during the period of water supply cut-off without destruction of chlorophyll by the drought stress. In conclusion, P. densiflora seedlings showed the lowest abscisic acid content and the highest chlorophyll content during water cut-off or drought stress at the intermediate (2.0g/ℓ) fertilizer treatment. The results suggested that the appropriate fertilizer treatment for improving the drought resistance of P. densiflora seedlings is the intermediate (2.0g/ℓ) level.

4차 혁명 시대와 도시조명의 나아가야 할 방향

박진화 한국조명·전기설비학회 2018 조명.전기설비 Vol.32 No.1

간호대학생의 학업스트레스가 대학생활적응에 미치는 영향: 교수신뢰의 매개효과

박진화(Park, Jin-Hwa),이은경(Lee, Eun Kyung) 학습자중심교과교육학회 2016 학습자중심교과교육연구 Vol.16 No.7

The purpose of this study was to examine the effects of academic stress and professor trust on college adjustment in nursing female students and to identify the mediating effect of professor trust. A cross-sectional study was conducted using a structured questionnaires with 155 nursing students who completed an informed consent in K region and D city. Data were assessed by academic stress, professor trust and college adjustment scale. The data were analyzed through descriptive statistics, t-test, ANOVA, Pearson s correlation, Sobel test, Hierarchial Multiple Regression using SPSS IBM 19.0. The results of the study are as follows: A statistically significant negative correlation was found for college adjustment with academic stress. Professor trust was a statistically significant positive correlation with college adjustment and had partial mediating effect on the relationship between academic stress and college adjustment. The personal relationship, academic stress, and professor trust were significant to predict the level of college adjustment in nursing female students, accounting for 31% of the variability. The results imply that the program for encouraging a positive interaction between a professor and a student should be developed for increasing students college adjustment. 본 연구의 목적은 간호대학생의 학업스트레스와 대학생활적응과의 관계에서 교수 신뢰의 매개효과를 파악하는데 있다. 연구기간은 2016년 3월 7일부터 28일까지이며, K도 및 D시에 소재한 간호학과 재학중인 여대생 155명을 편의표집하였다. 자료분석은 SPSS IBM 19.0을 이용하여 서술통계, t-test, ANOVA, Pearson s correlation, Sobel test, Hierarchial Multiple Regression을 이용하였다. 연구대상자의 대학생활적응은 보통보다 약간 높은 수준이었으며, 각 영역별 점수에서 학업활동이 가장 높았다. 연구대상자의 일반적 특성에 따른 대학생활적응은 인간관계에 따라 통계적으로 유의한 차이를 보였으며, 위계적 다중회귀분석결과에서 간호대학생의 대학생활적응의 회귀모형은 통계적으로 유의하였으며, 좋은 인간관계, 학업스트레스, 교수신뢰가 유의한 영향요인이었으며, 대상자의 대학생활적응을 총 31%설명하는 것으로 나타났다. 또한 학업스트레스와 대학생활적응과의 관계에서 교수신뢰는 부분매개효과를 갖는 것으로 나타났다. 따라서 대학생활적응을 높이기 위해서는 교수자와 학습자간의 신뢰를 높일 수 있는 긍정적인 상호작용을 증진시킬 수 있는 프로그램 마련이 필요하다.