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백지영(Ji Young Baek),최성원(Sung Won Choi),이의웅(Eui Woong Lee),최은창(Eun Chang Choi),차인호(In Ho Cha) 대한구강악안면외과학회 2000 대한구강악안면외과학회지 Vol.26 No.4
Malignant tumors of the maxilla represent about 3-4% of head and neck malignant neoplasm and the origins are maxillary gingiva, hard palate and maxillary sinus. We are to investigate clinical features and results according to various treatment modalities of maxillary malignant tumor to get information for better treatment results. Sixty patients with malignant maxillary tumors treated at Yonsei medical center from 1992 to 1997 were studied retrospectively. They are evaluated according to clinical signs & symptoms, stages at first diagnosis, primary site, histopathologic features, treatment method, recurrence and survival rate with clinical records, biopsy results and CT radiograph. The most common primary site was maxillary sinus and most common histopathology was squamous cell carcinoma. The local recurrence rate was 18% at 5 years, neck failure was 3% and distant metastasis was 18%. Overall survival rate was 78% at 2 years and 69% at 5 years. Failure at primary site is the main problem in the curative treatment. So, to improve survival in these patients efforts should be directed toward improvement of local control.
영유아교사의 교수효능감과 영유아와의 상호작용 관계에서 교사전문성의 매개효과
백지영(Baek, ji young),백영숙(Paik, Young Suk),오현숙(Oh, Hyun Suk) 학습자중심교과교육학회 2021 학습자중심교과교육연구 Vol.21 No.14
목적 본 연구는 영유아교사의 교수효능감이 교사-영유아 상호작용과의 상관은 어떠하며, 교사전문성를 매개로 그 효과를 살펴보는데 목적을 두고 있다. 방법 이를 위하여 K시의 영유아교사 386명을 대상으로 영유아교사의 교수효능감, 교사-영유아 상호작용, 교사전문성관련 변인을 측정하기위한 검사를 실시하였다. 수집된 자료는 PASW 24.0을 활용하여 분석하였으며, 매개효과 검증은 Baron과 Kenny(1986)의 매개효과 검증절차에 따라 교사전문성의 매개효과를 분석하였다. 결과 연구결과는 첫째, 영유아교사의 교수효능감, 교사-영유아 상호작용, 교사전문성 변인 간에 모두 의미 있는 정적상관이 있는 것으로 나타났다. 둘째, 영유아교사의 교수효능감과 영유아 상호작용과의 관계에서 교사전문성의 매개효과를 살펴보기 위해 교수효능감과 교사전문성을 순차적으로 투입한 결과, 영유아교사의 교수효능감은 교사-영유아 상호작용에 더하여 교사전문성을 추가한 연구결과는 통계적으로 의미가 있는 것으로 확인되었다. 결론 따라서 영유아교육현장에서 교수효능감과 전문성을 증진시켜 교사-영유아 상호작용의 질 향상 뿐 아니라 교수효능감과 교사전문성을 증진시킬 수 있는 교사교육이 필요함을 시사한다. Objectives The purpose of this study is to examine the relationship between the teacher s teaching efficacy and the teacher-child interaction, and the effect of teacher expertise as a medium. Methods To this end, a test was conducted to measure the variables related to the teaching efficacy of early childhood teachers, teacher-child interaction, and teacher expertise, targeting 386 early childhood teachers in K city. the collected data was analyzed using PASW 24.0, and the parameters verification were analyzed the mediating effect of teacher expertise in accordance with the verification procedure of Baron and Kenny(1986). Results In the research results, first, it was found that there were significant positive correlations between early childhood teachers teaching efficacy, teacher-child interaction, and teacher expertise. Second, in order to examine the mediating effect of teacher expertise in the relationship between early childhood teachers teaching efficacy and teacher-child interaction, teaching efficacy and teacher expertise were sequentially introduced. In addition, the research results that added teacher expertise were found to be statistically significant. Conclusions Therefore, this suggests that teacher education is needed to improve teaching efficacy and teacher expertise as well as improving the quality of teacher-child interaction by enhancing teaching efficacy and their expertise in the early childhood education sites.
Testifying LTE Assumption for Heat Transport in GWHP Systems
Ji-Young Baek(백지영),Byeong-Hak Park(박병학),Kang-Kun Lee(이강근) 한국신재생에너지학회 2021 한국신재생에너지학회 학술대회논문집 Vol.2021 No.7
Accurate prediction of thermal plume propagation is very important in the design stage of groundwater heat pump (GWHP) systems. Generally, a single differential transport equation has been applied to interpret the propagation of thermal plume by assuming local thermal equilibrium (LTE), immediate thermal equilibrium between the solid and neighboring fluid. With the increase of flow velocity, however, the thermal equilibrium cannot be reached immediately. Despite this possibility, there is a lack of studies that enable to verification of the LTE assumption for the hydrogeological systems. In this study, laboratory experiments were performed using both heat and solute as tracers at various background flow velocities (Reynolds number, Re 〈0.37) to testify the LTE assumption. Observed responses to the tracer injection were analyzed by mathematical models and derived velocities and dispersion coefficients of solute and heat were compared using retardation factors. Consequently, it was experimentally confirmed that the LTE assumption can be violated in Darcy range (Re 〈3). Thermal dispersion coefficients derived by the heat tracer were larger than those estimated by the solute tracer due to violation of the LTE. This result suggests that the LTE assumption needs to be verified for the design of the GWHP system.
백지영 ( Ji Young Baek ),박창서 ( Chang Seo Park ),주성홍 ( Sung Hong Joo ) 대한산부인과학회 2007 Obstetrics & Gynecology Science Vol.50 No.6
지방육종은 전체 암의 1% 정도를 차지할 정도로 성인에 발생하는 연조직육종 중 가장 흔하지만 회음부에서 발생하는 지방육종은 드문 질환으로 술 전 진단이 용이하지 않아서 대부분 수술 후 병리조직학적 검사로 확진된다. 저자는 약 4달전부터 서서히 커지기 시작한 양측 회음부의 무통성 종물을 주소로 내원한 33세 여자의 회음부 지방육종에 대해 완전한 수술적 절제 후 보조 방사선 치료 하지 않고 수술로 완전 절제가 이루어져 국소재발 없이 치료에 성공한 사례를 보고하는 바이다. Liposarcoma is one of the most common soft tissue sarcoma of adults and accounts for 1% in all malignant neoplasm. A liposarcoma of perineal origin is excessively rare, and preoperative diagnosis is difficult. Perineal liposarcoma was diagnosed in a 38-year-old woman. She presented with a large soft lump in the both perineal region of 4 months duration. We report a case of a liposarcoma on perineum which was treated with complete surgical resection without adjuvant radiation therapy. The patient has survived 2 years with no evidence of a recurrence.