Mg 첨가에 따른 수성가스전이반응용 Cu/ZnO/Al₂O₃ 촉매의 활성 연구

박지혜,백정훈,황라현,이광복,Park, Ji Hye,Baek, Jeong Hun,Hwang, Ra Hyun,Yi, Kwang Bok 한국청정기술학회 2017 청정기술 Vol.23 No.4

저온 수성가스전이반응에서 $Cu/ZnO/MgO/Al_2O_3$ (CZMA) 촉매의 마그네슘의 영향을 조사하기 위하여 Cu/Zn/Mg/Al의 비율을 45/45/5/5 mol%로 공침법을 사용하여 제조하였다. 제조된 촉매들은 BET, $N_2O$ 화학흡착, XRD, $H_2-TPR$ and $NH_3-TPD$를 사용하여 분석되었다. 촉매 활성 테스트는 GHSV $28,000h^{-1}$와 온도 범위 $200{\sim}320^{\circ}C$에서 수행되었다. 동일한 조건에서 마그네슘이 첨가된 촉매(CZMA 400)는 가장 낮은 환원 온도를 나타내며 활성종인 $Cu^+$가 안정적으로 존재하고 또한 많은 약산점을 보유하였다. 또한 마그네슘이 첨가된 촉매(CZMA)는 마그네슘이 첨가되지 않은 촉매(CZA)와 비교하였을 때 240 이상의 높은 온도에서 촉매 활성이 증가하였다. CZMA 400 촉매는 최적의 촉매로서 $240^{\circ}C$, GHSV $28,000h^{-1}$에서 75 h 동안 활성의 저하없이 평균 CO 전환율 77.59%를 나타내었다. To investigate the effect of magnesium oxide addition, $Cu/ZnO/MgO/Al_2O_3$ (CZMA) catalysts were prepared using co-precipitation method with fixed molar ratio of Cu/Zn/Mg/Al as 45/45/5/5 mol% for low-temperature water gas shift reaction. Synthesized catalysts were characterized by using BET, $N_2O$ chemisorption, XRD, $H_2-TPR$ and $NH_3-TPD$ analysis. The catalytic activity tests were carried out at a GHSV of $28,000h^{-1}$ and a temperature range of $200{\sim}320^{\circ}C$. At the same condition, magnesium oxide added catalyst (CZMA 400) showed that the lowest reduction temperature and stable presence of $Cu^+$, that is active species and abundant weak acid site. Also magnesium oxide added catalysts (CZMA) showed higher catalytic activity at temperature range above $240^{\circ}C$ than the catalyst without magnesium oxide (CZA). Consequently, CZMA 400 catalyst is considered to be excellent catalyst showing CO conversion of 77.59% without deactivation for about 75 hours at $240^{\circ}C$, GHSV $28,000h^{-1}$.

대화체와 낭독체의 운율에 관한 연구

박지혜,Park Jihye 대한음성학회 2002 말소리 Vol.43 No.-

In this paper, speech style is divided into two - read speech and dialogue. In the experiment, read speech and dialogue use the same sentence to control discrepancy from different sentence. While the number of AP in read speech is less than in dialogue, the number of IP in read speech is more than in dialogue. The number of syllables which consist of AP is more various in dialogue. Intonational patterns of the first AP in IP make a difference. In dialogue, there is a pattern which has many high tones - LHH. The FO range in dialogue is wider than in read speech.

폴리카보실란계 바인더를 이용한 다공성 SiC 세라믹스의 제조

박지혜,김영희,정미원,Park, Jihye,Kim, Younghee,Jung, Miewon 한국세라믹학회 2012 한국세라믹학회지 Vol.49 No.5

Porous SiC ceramics were prepared by using recycled SiC sludge, which is an industrial waste generated from solar cell industry. Polycarbosilane derivatives, such as polycarbosilane (PCS), polyphenylcarbosilane (PPCS) and hydridopolycarbosilane (HPCS) were used as binding agents for the fabrication of porous SiC ceramics at $1800^{\circ}C$ under Ar atmosphere. The effects of the various binding agents having different C/Si ratios were discussed on the sintering and porosity of the SiC ceramics. The prepared porous SiC ceramics were characterized by X-ray Diffraction (XRD) and Field-Emission Scanning Electron Microscope (FE-SEM). Thermal conductivity and porosity of SiC ceramics were measured at room temperature, and they were 56.7W/mK and 29.8%, respectively.

희귀난치성질환자들의 징검다리 '여울돌'

박지혜,Park, Ji-Hye 한국사회복지사협회 2005 Social workers Vol.6 No.-

항암제 유발 말초신경병증 변증평가도구의 신뢰도 및 타당도 평가

박지혜,정인철,이서현,이석훈,최석철,유화승,Park, Ji-hye,Jung, In-chul,Lee, Seo-hyun,Lee, Suk-hoon,Choi, Seok-cheol,Yoo, Hwa-seung 대한한방내과학회 2016 大韓韓方內科學會誌 Vol.37 No.4

Objectives: The purpose of this study was to evaluate the reliability and validity of an instrument for pattern identification and evaluation in chemotherapy-induced peripheral neuropathy (CIPN).Methods: The study consisted of 66 patients with CIPN (visual analog scale ≥30 mm, Eastern Cooperative Oncology Group ≤2). The test-retest reliability of the instrument for pattern identification and evaluation in CIPN was tested twice with the same patients in one week.Results: Pearson’s coefficient test-retest reliability of the instrument was 0.601-0.777. The internal reliability of each part was 0.619-0.811. To confirm the validity of the instrument for pattern identification and evaluation for CIPN, the correlation between the score for each identification pattern and that of other CIPN instruments was analyzed. The results revealed a positive correlation between the Functional Assessment of Cancer Therapy-General and CIPN-20.Conclusion: The reliability of the instrument for pattern identification and evaluation in CIPN was moderate, and the validity analysis revealed a positive correlation.

현장속으로-청소년 문화의 집 방과 후 아카데미 최경숙 사회복지사

박지혜,Park, Ji-Hye 한국사회복지사협회 2007 Social workers Vol.1 No.-

연질현미의 이화학적 및 취반 특성

박지혜,신말식,Park, Jihye,Shin, Malshick 한국식품조리과학회 2016 한국식품조리과학회지 Vol.32 No.5

Purpose: To improve the cooking quality of brown rice, newly inbred soft rice cultivars were investigated. Methods: The physicochemical properties of brown rice flour and water absorption patterns and cooking characteristics of brown rice grain were compared to Ilmi white and brown rice. Results: General composition and total dietary fiber contents of five rices were significantly different with higher ash, protein, and total dietary fiber contents in soft brown rice than white rice. The hardness of raw rice grain was higher in Ilmi brown rice than in soft brown rice. The water absorption increased rapidly in 30 min of white rice and in 4-6 h of brown rices. The apparent amylose content of soft brown rice was lower than that of Ilmi rice. The initial pasting temperature and all viscosities were significantly different, but the trend was not similar. The textural properties of hardness and roughness were higher, but adhesiveness, cohesiveness, and stickiness were lower in Ilmi brown rice than white and soft brown rices. In sensory preference test, not only textural properties, hardness, adhesiveness, cohesiveness, stickiness, and roughness, but also color, glossiness, and roasted flavor were higher in soft brown rices. Especially soft brown rice B showed the best cooking quality among all rices. Conclusion: The results of the study suggested that soft brown rice is developed for cooking with high nutritional and functional quality.

교원능력개발평가 사서교사 평가지표와 문항의 중요도 및 수행도에 대한 사서교사들의 인식

박지혜,최희준,Park, Ji-Hye,Choi, Hee-Jun 한국도서관정보학회 2009 한국도서관정보학회지 Vol.40 No.4

이 연구는 2009년에 개발되어 현재 선도학교를 통해 활용되고 있는 교원능력개발평가 사서교사 평가지표 및 문항에 대한 설문조사를 통해 그 개선점을 제안하였다. 연구결과 현행 평가지표 및 문항의 중요도에 대한 사서교사의 인식이 대체로 긍정적인 것으로 나타났고, 각 문항의 중요도와 수행도에 대한 사서교사의 인식에는 통계적으로 유의미한 차이가 있었다. 평가지표 및 문항에서 개선해야 할 점으로는 현재의 평가문항에 다양한 독서교육활동 실시여부에 대한 항목 추가, 자료조직 및 관리 관련 평가문항 수정의 필요성, 학생지도 평가영역 명칭에 대한 제고 등이 제기되었다. 이러한 연구결과는 현재 활용되고 있는 사서교사 평가지표와 문항이 대체로 타당하기는 하지만 일부분에서 수정 보완이 필요함을 제시하였다. This study aimed to analyze teacher librarians' perceptions of the importance and performance frequency of their roles inherent in the indicators and items for teacher evaluation and to determine their appropriateness. The results revealed that most indicators and items are appropriate for evaluating teacher librarians' job performance, but some items need to be revised to properly reflect teacher librarians' job tasks. Specific recommendations for their improvement were discussed.

악안면부 충격시 치아와 악골의 응력 분포에 대한 구강보호장치의 역할에 관한 유한요소분석 - 상악 중절치에 가해진 충격에 대하여

박지혜,이성복,권긍록,최대균,Park, Ji-Hye,Lee, Sung-Bok,Kwon, Kung-Rock,Choi, Dae-Gyun 대한치과보철학회 2006 대한치과보철학회지 Vol.44 No.5

Statement of problem : The use of mouthguard is important as the leisure life is popular today. Purpose: The purpose of this study is to investigate the effect of a mouthguard on stress distribution in teeth, maxilla and mandible for maxilla impact. Material and methods: The 3-dimensional finite element model was based on a CT scan film of an average korean adult when the subject is using a customized mouthguard which was made with the Signature Mouthguard system of Dreve. The load was applied to the upper central incisor cervical area parellel impact force for 0.1sec(L1). The Von-mises stress analysis with a mouthguard and without a mouthguard was compared. Results: The results of this study were as follows: 1. Without the mouthguard, stress was concentrated on teeth and alveolar bone in all load conditions. 2. With the mouthguard. maximum stress value was decreased and stress was dispersed in all load conditions. 3. Stress extinction with the mouthguard was faster than without the mouthguard in all load conditions. Conclusion: We acknowledged that the mouthguard has a stress buffer effect as the maximum stress value was decreased and stress was dispersed when impact force was applied.

사회복지기관 인증제, 고객만족 제도의 시작

박지혜,Park, Ji-Hye 한국사회복지사협회 2006 Social workers Vol.8 No.-