원전 방사성 콘크리트 기계적 절단의 방사성 에어로졸에 대한 작업자 내부피폭선량 평가

박지혜,양원석,채낙규,이민호,최성열,Park, Jihye,Yang, Wonseok,Chae, Nakkyu,Lee, Minho,Choi, Sungyeol 한국방사성폐기물학회 2020 방사성폐기물학회지 Vol.18 No.2

원전 해체 공정 중 다량의 콘크리트 방사성 폐기물의 절단 과정에서 불가피하게 방사성 에어로졸이 생성된다. 방사성 에어로졸은 인체 호흡기 흡착에 의한 내부피폭을 유발하기 때문에 작업자의 방사선 방호를 위한 내부피폭평가가 필수적으로 시행되어야 한다. 그러나 실제 작업환경의 에어로졸 특성값을 사용하기에는 선행 연구가 미비하며 콘크리트에 포함된 방사성 핵종의 수가 많기 때문에 정확한 작업자 내부피폭평가를 위해서는 상당한 시간과 인력이 필요하다. 따라서, 본 연구에서는 사전 연구된 콘크리트 에어로졸 특성값을 활용하여 원전 해체 전 절단 작업자의 내부 피폭량을 빠르게 예측할 수 있는 새로운 방법론을 제시하고자 한다. 본 연구팀은 콘크리트 절단 시 발생하는 사전 연구에서 발표된 에어로졸의 수농도 크기 분포데이터를 뉴턴-랩슨법을 이용하여 피폭평가 계산에 필요한 방사능중앙 공기중역학직경(Activity Median Aerodynamic Diameter)값으로 변환하였다. 또한 원전 정지 10년 후 비방사능 값을 ORIGEN code로 계산하였으며, 최종적으로 핵종별 예탁유효선량을 IMBA 프로그램을 이용하여 계산하였다. 핵종별 예탁유효선량값을 비교한 결과 152Eu에 의한 최대 예탁유효선량은 전체 선량값의 83.09%를 차지하고, ¹⁵²Eu를 포함한 상위 5개 원소(¹⁵²Eu, ¹⁵⁴Eu, ⁶⁰Co, ²³⁹Pu, ⁵⁵Fe)의 경우 최대 99.63%를 차지함을 확인하였다. 따라서 원전 해체 전 콘크리트의 구성 원소 중 상위 5개 주요 원소 측정을 먼저 시행한다면 더 빠르고 원활한 방사능 피폭관리 및 해체 작업 안전성 평가가 가능할 것으로 판단된다.

실리콘 전하선택접합 태양전지 적용을 위한 원자층 증착법으로 증착된 VO_x 박막의 특성

박지혜,장효식,Park, Jihye,Chang, Hyo Sik 한국재료학회 2020 한국재료학회지 Vol.30 No.12

Silicon heterojunction solar cells can achieve high conversion efficiency with a simple structure. In this study, we investigate the passivation characteristics of VOx thin films as a hole-selective contact layer using ALD (atomic layer deposition). Passivation characteristics improve with iVoc (implied open-circuit voltage) of 662 mV and minority carrier lifetime of 73.9 µs after post-deposition annealing (PDA) at 100 ℃. The improved values are mainly attributed to a decrease in carbon during the VOx thin film process after PDA. However, once it is annealed at temperatures above 250 ℃ the properties are rapidly degraded. X-ray photoelectron spectroscopy is used to analyze the chemical states of the VOx thin film. As the annealing temperature increases, it shows more formation of SiOx at the interface increases. The ratio of V5+ to V4+, which is the oxidation states of vanadium oxide thin films, are 6:4 for both as-deposition and annealing at 100 ℃, and 5:5 for annealing at 300 ℃. The lower the carbon content of the ALD VOx film and the higher the V5+ ratio, the better the passivation characteristics.

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.

Trastuzumab으로 장기 생존한 진행성 위암 증례 1예

박지혜,이상길,Jihye Park,Sang Kil Lee 대한소화기암연구학회 2015 Journal of digestive cancer reports Vol.3 No.1

We report a case of long term survival on trastuzumab based treatment. A 51-year-old man with dyspepsia received esophagogastroduodenoscopy on another hospital and was transferred for further evaluation under the impression of advanced gastric cancer, Borrmann type III, antrum, lesser curvature. After further studies in our hospital, the patient was diagnosed with advanced gastric cancer, adenocarcinoma, moderately differentiated with pancreas invasion and lymph node metastasis. Though he was recommended with chemotherapy, he refused and left for oriental herbal medicine. After 4 months, the patient was admitted through emergency room for hematemesis. Diagnosed with gastric outlet obstruction due to gastric cancer in the antrum, he underwent the placement of pyloric metal stent insertion. Immunohistochemical staining showed HER2-positive finding, and he was treated with palliative chemotherapy of trastuzumab, capecitabine, and cisplatin, 16 times during 11 months. The patient showed neutropenia after the therapy, so cisplatin was left out, and he received combination chemotherapy of trastuzumab and capecitabine, 34 times during 25 months. Response evaluation showed no remarkable change in extent of primary stomach cancer, lymph node metastasis, and regression of metastasis site, and the patient is continuing chemotherapy.

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.

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.

제품 경험 기간에 대해 지각된 시간적 거리가 소비자 번들 구성 선택에 미치는 영향

박지혜(Jihye Park) 한국경영학회 2014 經營學硏究 Vol.43 No.6

평생교육 프로그램 개발에 대한 2010년 이후 국내 연구 동향: 상호작용모형의 적용을 중심으로

박지혜(Jihye Park),김재연(Jaeyeon Kim) 한국방송통신대학교 미래원격교육연구원 2022 평생학습사회 Vol.18 No.4

우리나라 청소년의 건강행태와 구강질환증상의 관련성

박지혜 ( Jihye Park ),김창숙 ( Changsuk Kim ) 한국치위생학회 2015 한국치위생학회지 Vol.15 No.5

Objectives: The purpose of the study was to investigate the relationship between health behavior and oral symptoms in Korean adolescents. Methods: The subjects were 72,060 adolescents who were selected from the web-based survey of the 10th (2014) Korean Youth Risk Behavior of Korean Center for Disease Control. Data were analyzed by PASW statistics 18.0. A web-based self-reported questionnaire was completed by 74,167 middle and high school students. The subjects consisted of 36,470 boy students (52.2%) and 35,590 girl students (47.8%) from 400 middle schools and 400 high schools. Results: Multiple logistic regression analysis revealed that experience of oral symptoms were related with sex, age, academic achievement, economic status, alcohol drinking, moderate physical activity, muscular strength exercises, walking, fruit consumption, milk consumption, fast food consumption, snack consumption, daily tooth brushing frequency, use of fluoride toothpaste, school based oral health education, dental sealant and dental scaling. Conclusions: There were close relationship between heath behavior, oral health behavior, and experience of oral symptoms. To improve the health promotion for the adolescents, oral health program development and primary prevention strategy must be established.

협업 촉진전략 CPS를 활용한 백화점 VMD에 관한 연구

박지혜 ( Jihye Park ),이정교 ( Jung Kyo Lee ) 한국공간디자인학회 2016 한국공간디자인학회논문집 Vol.11 No.6

In terms of department store design management strategies, promotions assist consumers in making choices about purchasing the products that the department store has set as the main sales target. Consumers fall into various and distinctive consumption patterns as time passes. Series of department store VMDs, which take place according to the season, may overlap each other in terms of concept and direction method, so there is a limit in appealing to the identity of each department store. Therefore, in order to distinguish oneself from other stores in the eyes of consumers, a strategic promotion and a VMD plan that is closely related to such promotion need to be established. Therefore, this study suggests a collaborative VMD among brands as an alternative model for differentiated design plans among department stores. It analyzes the existing successful cases in Korea and abroad to evaluate and study the utilization of collaboration as a visual marketing strategy. (Method)This study analyzes the concept and definition of department VMD and collaborative promotion marketing through references. Furthermore, it researches previous studies about collaboration and department VMD as well as actual cases where it is applied. Actual cases are limited to those with collaboration between department stores and a single brand, and they are analyzed by an expert group through a survey. The analysis is based on the basic concepts of VMD, which are merchandising, space design, and display, which is further broken down into aesthetic, experience, directing, and symbolic aspects. The evaluation and analysis results from cases are digitized for a quantitative evaluation. (Results)This study shows through the analysis of previous cases that a collaboration strategy arouses consumer interest by making a visual exposure of seasonal VMD, and it contributes to brand promotion. It also presented cases that proceeded with seasonal directing without problems. In addition, it showed through these cases that new sales can be expected through promotional products that can come from such collaboration. (Conclusions)A strategy of collaboration can lead to a complementary effect between brand and brand as well as between brand and retail. Moreover, it can avoid overlap in seasonal VMD plans with other competitors. From spatial directing to MD and production directing, it can be directed in unison as a single concept that generates a proper function in assisting brand promotion and sales. Therefore, it should be suggested as an alternative VMD plan in Korea department stores.