악성 흑색종 치료를 위한 피판술의 임상적 결과

전우주,강종우,김일환,손길수,박종웅,Jeon, Woo-Joo,Kang, Jong-Woo,Kim, Il-Hwan,Son, Gil-Soo,Park, Jong-Woong 대한미세수술학회 2010 Archives of reconstructive microsurgery Vol.19 No.2

In surgical treatment of the malignant melanoma, radical resection and a sentinel lymph node biopsy are essential procedures to eradicate the tumor and to minimize the risk of local recurrence. For the reconstruction of skin defect after tumor resection, a skin graft has been generally performed procedure. However, if tendon or bone is exposed after tumor resection, simple skin graft is not enough for the coverage of the defect and additional procedure is mandatory. In this study, we reviewed the clinical results of 16 patients, who had been diagnosed with malignant melanoma of the limb and underwent surgical resection and reconstruction of the defect with various methods. The sentinel lymph node dissection was performed in all patients combined with radical excision of the tumor. In 11 cases of positive sentinel lymph nodes, further elective lymph node dissections were performed. The mean tumor invasion depth was 4.54 mm (2~10 mm), and AJCC stage II was most common (9 cases). The pedicled flaps were performed in 10 cases for the reconstruction of defects. All flaps were successfully survived without significant complications until the last follow up. In conclusion, a pedicled flap coverage is very useful reconstruction strategy for the soft tissue defects after radical resection of malignant melanoma.

한국인과 중국인 한국어 중급 학습자의 감사 부담감과 전략 사용 차이 비교 연구 -여성 화자를 중심으로-

전우주,동준루 이중언어학회 2022 이중언어학 Vol.89 No.-

This study aims to contrast the realization and strategy patterns of thanking speech acts between Korean Native speakers and Chinese Korean learners. (1) Is there a difference in the perceptions of Korean and Chinese learners thanking speech acts based on the situation? (2) Is there a difference in the use of thanking strategies by situation by Korean and Chinese learners? DCT was conducted to collect data from two groups consisting of 30 native Korean speakers and 30 Chinese Korean learners. For research question 1, we conducted an independent sample-test and a paired sample-test on the burden of thanking among the two groups. For research question 2, a chi-square test was conducted on whether the two groups used indirect strategies, and the thanking strategies used in each situation were analyzed. While Koreans do not feel pressured to thank their intimate counterparts, they were conventionally using various indirect and direct strategies to save face for the people who benefited them. The Chinese learners were burdened with almost all of the thanking situations, but preferred direct strategies according to cultural customs that made relationships awkward if they talked burdensomely with close friends. Furthermore, both groups felt burdened by situations in which the interlocutor voluntarily gave them grace, but their preferred strategies differed. Since Koreans used various thanking and compensation strategies to return what they received, their gratitude expressions tended to be longer. However, Chinese learners ended the conversation with only a direct thank-you because they feared that if they said too much to express their gratitude, their relationship with the other party would become distant. This contrasts with the utterance of Koreans who used additional expressions to avoid the sudden end of the conversation when only direct thanking strategies were used. The results of the study showed that the strategies used in each situation differed, but both groups were appropriately using strategies to avoid damaging the interlocutor’s face according to their respective cultural norms. However, this study confirmed that while Koreans used various indirect strategies to avoid awkward relationships with their counterparts in certain situations, Chinese learners tended to prefer direct thank-you expressions in the same situations. These differences caused by socio-cultural characteristics can make it difficult to maintain smooth human relationships along with pragmatic failures. Therefore, in the field of Korean language education, it is necessary to teach various expressions and strategies that are customarily preferred and used in actual thanking speech acts. 본 연구의 목적은 한국인 모어 화자와 중국인 한국어 학습자 간의 감사 화행에 대한 인식과 감사 전략 사용 차이를 비교하는 것이다. 연구 문제는 다음과 같다. (1) 한국인과 중국인 학습자의 상황별 감사 화행 인식에 차이가 있는가? (2) 한국인과 중국인 학습자의 상황별 감사 전략 사용에 차이가 있는가? 실험 참여자는 한국어 원어민 30명과 중국인 한국어 학습자 30명이고 두 그룹의 데이터를 수집하기 위해 DCT를 진행하였다. 연구 문제 1에서 두 집단의 감사 인사에 대한 부담감에 대해 독립표본 t검정과 대응표본 t검정을 실시하였다. 연구 문제 2에서는 두 집단의 간접 전략 사용 여부에 대해 카이제곱 검정을 실시하였고, 각 상황에서 사용된 감사 전략을 분석하였다. 연구 결과, 한국인들은 친밀한 상대에게 감사 인사를 하는 것에는 부담감을 느끼지 않지만, 자신에게 이익을 준 상대방의 체면을 세우기 위해 관습적으로 직접 전략과 더불어 다양한 간접 전략을 사용하고 있었다. 중국인들은 거의 모든 감사 상황에 대해 부담스러워하고 있었지만, 친한 사이에 부담스럽게 이야기하면 관계가 어색해지는 문화적 관습에 따라 직접적인 전략을 더 선호하고 있었다. 또한 두 집단 모두 상대방이 자발적으로 나에게 큰 은혜를 베푼 상황을 부담스럽게 느끼고 있었지만, 선호하는 전략이 달랐다. 한국인들은 받은 것을 돌려주겠다는 보상 전략과 더불어 다양한 감사 전략을 사용하였기 때문에 발화가 길어지는 경향이 나타났다. 그러나 중국인 학습자들은 감사하는 마음을 표현하기 위해 너무 많은 말을 할 경우 상대와의 관계가 멀어질 것을 염려하여 직접적인 감사 인사만으로 대화를 끝내고 있었다. 이는 직접적인 감사 전략만을 사용했을 때 갑자기 대화가 끝나는 상황을 피하고자 부가적인 표현을 사용한 한국인들의 발화와 대비된다. 정리해 보면, 각 상황에서 사용한 전략은 차이가 나타나지만 두 집단 모두 각각의 문화적 규범에 따라 상대방의 체면을 손상시키지 않기 위해 적절하게 전략을 사용하고 있었다. 그러나 본 연구는 한국인들이 상대와의 관계가 서먹해지는 상황을 피하고자 간접 전략을 다양하게 사용하는 상황에서 학습자들은 직접적인 감사 표현을 더 선호하는 경향이 있는 것을 확인하였다. 사회문화적 특성으로 인해 유발된 이러한 차이는 화용적 실패와 더불어 원만한 인간관계 유지를 어렵게 만들 수 있다. 따라서 한국어 교육 분야에서는 실제 감사 화행에서 관습적으로 선호되고 사용되는 다양한 표현과 전략들을 가르칠 필요가 있다.

¹²5Te 붕괴시 K각 이중이온화에 관한 연구

朱寬植,崔惠珍,全禹柱 명지대학교 자연과학연구소 1990 자연과학논문집 Vol.8 No.-

Double ionization of the K-shell accompaning K-shell internal conversion of the 0.035 MeV transition of ???Te has been studied by recording coincidences between Kα hyper satellite x-rays and Kα satellite x-rays emitted when double vacancies are filled. The ???I source material was used for this study. The recorded coincidence spectrum, using two Ge(Li) detectors and TAC, was analyzed. And then we obtained the measured coincidence unmber N(Kα?? Kα??) and the total number N(Kα) of K x-rays. Using these values, the probability per K-shell internal conversion that a double vacancy is formed, Pkk(IC), was found to be 0.51×10??. We recognized that this value is almost the same as the result from fitting thend of experimental values for various elements by computer. However there is some difference between our result and the corresponding theoretical value.

그루브 위치가 리니어 압축기용 피스톤과 실린더의 윤활특성에 미치는 영향

전우주(W. J. Jeon),손상익(S. I. Son),이혁(H. Lee),김정우(J. W. Kim),김경웅(K. W. Kim) 한국트라이볼로지학회 2016 한국트라이볼로지학회지 (Tribol. Lubr.) Vol.32 No.1

In this paper hydrodynamic lubrication analysis is carried out to investigate the effects of groove location on the lubrication performance of a piston and cylinder system in a linear compressor. The rectangle shaped grooves having a constant groove depth and width are applied on the lubrication area of the piston. The Universal Reynolds equation is used to calculate the oil film pressure, and the Elrod algorithm with the finite different method is used to solve the governing equation. The JFO boundary condition is applied to predict cavitation regions. Transient analysis for different locations of the grooves on the piston is carried out using the typical operating condition of the linear compressor in order to estimate the variations of frictional power losses and minimum film thicknesses. When the grooves are applied on the lubrication area, both the frictional power loss and the minimum film thickness decrease. The frictional power loss can be reduced effectively, while maintaining a minimum film thickness to enable the piston operation without direct contact with the cylinder surface, by means of choosing a proper location of the grooves. The optimum location of the grooves to improve a lubrication performance depends on the operation condition or the system requirements specification.

그루브의 꺾임각과 폭이 헤링본 그루브 저널베어링의 윤활특성에 미치는 영향

전우주(J. W. Jeon),김경웅(K. W. Kim) 한국트라이볼로지학회 2012 한국트라이볼로지학회 학술대회 Vol.2012 No.10

정렬불량이 로터리 압축기용 저널베어링의 윤활성능에 미치는 영향

전우주(J. W. Jeon),손상익(S. I. Son),김경웅(K. W. Kim) 한국트라이볼로지학회 2011 한국트라이볼로지학회 학술대회 Vol.2011 No.10

베어링의 길이와 틈새가 저널베어링의 성능에 미치는 영향

전우주(J. W. Jeon),김경웅(K. W. Kim) 한국트라이볼로지학회 2012 한국트라이볼로지학회 학술대회 Vol.2012 No.4

Batch ALD 공정에서 Multi-Hole Nozzle 의 Brokage 방지를 위한 구조 최적화

전우주(W. J. Jeon),박환욱(H. W. Park),김영완(Y. W. Kim) 한국정밀공학회 2014 한국정밀공학회 학술발표대회 논문집 Vol.2014 No.5월

홈의 원주방향 적용 범위가 피스톤의 윤활특성에 미치는 영향

전우주(W. J. Jeon),손상익(S.I. Son),김경웅(K. W. Kim) 한국트라이볼로지학회 2015 한국트라이볼로지학회 학술대회 Vol.2015 No.4

포트 마스킹과 흡기 밸브 타이밍이 실린더 내부의 싸이클별 HC와 NOx 생성에 미치는 영향

전우주(Wooju Jeon),최관희(Kwanhee Choi),명차리(Cha-Lee Myung),박심수(Simsoo Park),이경환(Kyung-Hwan Lee) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11

This paper investigated the behaviors of combustion characteristics at part load condition with various intake charge motions induced by the port masking schemes in the CVVT (Continuously Variable valve Timing) engine. Time resolved in-cylinder and exhaust emissions were measured by the fast response HC and NOx analyzers to examine their formation mechanisms and behavior characteristics. As a result, in-cylinder HC decreased with the advanced intake valve timings but HC at the exhaust port increased due to the worse combustion stabilities. However HC reduction could be achieved by the application of the port maskings with a enhancement of the engine stability. NOx also decreased with early intake timings by internal EGR but increased with the charge motion controls which enhance the combustion behavior.