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박선민,이동진,정은재,김진환,박일석,이민주,노영수 대한이비인후과학회 2013 Clinical and Experimental Otorhinolaryngology Vol.6 No.2
Objectives. To compare the therapeutic results between selective neck dissection (SND) and conversion modified radicalneck dissection (MRND) for the occult nodal metastasis cases in head and neck squamous cell carcinoma. Methods. Forty-four cases with occult nodal metastasis were enrolled in this observational cohort study. For twenty-ninecases, SNDs were done and for fifteen cases, as metastatic nodes were found in the operative field, conversion fromselective to MRNDs type II were done. Baseline data on primary site, T and N stage, extent of SND, extracapsularspread of occult metastatic node and type of postoperative adjuvant therapy were obtained. We compared locoregionalcontrol rate, overall survival rate and disease specific survival rate between two groups. Results. Among the 29 patients who underwent SND, only one patient had a nodal recurrence which occurred in the contralateralundissected neck. On the other hand, among the 15 patients who underwent conversion MRND, two patientshad nodal recurrences which occurred in previously undissected neck. According to the Kaplan Meier survivalcurve, there was no statistically significant difference for locoregional control rate, overall survival rate and diseasespecific survival rate between two groups (P=0.2719, P=0.7596, and P=0.2405, respectively). Conclusion. SND is enough to treat occult nodal metastasis in head and neck squamous cell carcinoma and it is not necessaryto convert from SND to comprehensive neck dissection.
박선민,김학균 한국문화융합학회 2017 문화와 융합 Vol.39 No.6
Early childhood is the time when physical, cognitive, social, and emotional development is radical. For them, it is necessary to approach various combined areas of integrated arts education through play. It helps improve creativity and multiple intelligence, develop the brain and has positive impacts on personal growth. This study examines the effects of integrated arts education on the creativity and multiple intelligence of Early childhood, and analyzed the examples of overseas integrated arts education programs. To investigate perceptions about integrated arts education during early childhood, a survey was conducted with 209 parents with preschool children, living in Seoul. As a result, parents realize the importance of integrated arts education, but they are lacking in understanding the importance of artistic creativity and multiple intelligence. This study chose Julia Gabriel’s EduDrama of Singapore and Very Young People’s Concert of the New York Philharmonic for integrated arts education program as case studies. This study analyzes success stories of international integrated arts education programs to develop a domestic adoption plan and attempts to contribute to the development of integrated arts areas during early childhood. By combining them, this paper examined the requirements of an ideal integrated arts education program and analyzed marketing methods. In addition, this research pursue to be a fundamental data of developing early childhood arts integrated educational programs in Korea and contribute to form consensus of parents as well as popularization of the programs.
객실 승무원의 업무재해관련 간접외상이 직무 스트레스와 안전행동에 미치는 영향: 직무 스트레스의 매개효과와 함께
박선민,현성협 한국마이스관광학회 2023 MICE관광연구 Vol.23 No.3
This study attempted to confirm that indirect trauma of flight attendants affects job stress and safety behavior. The trauma experience related to work accidents has been extended not only to direct trauma but also to indirect trauma. As a result of the analysis, indirect trauma had a positive effect on all sub-factors of job stress. In addition, role ambiguity and relationship with colleagues had a negative effect on safety behavior. These two variables also showed a mediating effect in the relationship between indirect trauma and safety behavior. Therefore, when flight attendants experience indirect trauma, he/she loses confidence and expectations in his/her role, his/her relationship with workers becomes unstable, and eventually shows problems with practical safety behavior. These results suggest that the organization should educate crew members on how to cope with stress and manage post-traumatic stress not only for direct outsiders but also for flight attendants who worked together or have close relationship.
La, Mn이 첨가된 PbTiO<sub>3</sub> 분말의 합성과 소결체 특성
박선민,김명섭,김호건,이철태 한국공업화학회 2001 한국공업화학회 연구논문 초록집 Vol.2001 No.-
산화물을 출발 물질로 하여 수열합성법에 의하여 PbTiO<sub>3</sub>에 La, Mn이 치환된 분말을 합성하고, 분말의 특성을 조사하였다. 또한 최적 조건에서 합성된 분말에 대하여 소결체를 제조하고, 이들의 전기적 특성을 조사하여 합성 분말과 소결체 및 전기적 특성과의 상관 관계에 대하여 고찰하였다. 0.99(Pb<sub>1-x</sub>La<sub>2x/3</sub>TiO<sub>3</sub>)+0.01MnO<sub>2</sub> 조성식으로부터 La의 치환량이 x=0.01인 조성에서 미반응물이 존재하지 않은 단일상의 분말이 합성되었으며, 최적의 수열 반응조건은 수열 용매; 8M-KOH, 반응온도; 27℃, 유지시간; 24h임을 알 수 있었다. 치환량이 x=0.01인 합성 분말은 평균 입경이 70nm로 구형의 입자가 비교적 균일하게 분포되어 있으며, 비표면적은 5.5m<sup>2</sup>/g를 나타났다. 격자 상수는 a=3.78Å, c=4.01Å와 cell volume 57.30Å<sup>3</sup>로 고용된 이온의 반경차에 의하여 PbTiO<sub>3</sub>보다 감소되었으나 정방 정축비(c/a)는 PbTiO<sub>3</sub>의 이론적 정방 정축비 c/a=1.06와 일치하였다. La가 치환된 합성 분말의 상전이 온도(Tc)는 400℃ 로 나타내었다. 소결체의 상대 밀도가 가장 높아지는 소결 온도와 시간은 각각 1180℃, 4시간이었으며, 이 소결 조건에서 소결체의 상대 밀도는 94%이었다. 유전 상수는 넓은 소결 온도와 소결 시간에서 비슷한 값을 나타내었다.