http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이업종 교류기업의 경영성과에 관한 연구 -기업가적 네트워킹 활동을 중심으로-
정대용 ( Dea Yong Chung ),유정환 ( Jung Hwan Yoo ),김춘광 ( Choon Kwang Kim ) 한국생산성학회 2011 生産性論集 Vol.25 No.3
This study pays attention to entrepreneurial networking, which is recently being emphasized by studies about entrepreneurship as an alternative to overcome inherent limitations and increase probability of success and survival of SMEs. In particular, SMEs hybrid business exchange accompanies networking which facilitates access to, and use of external resources and information that are crucial to survival of enterprises, which in turn makes it an effective alternative increasing the possibility of survival and success. Hereupon, this study considered the relationship between networking and performance of enterprises implementing hybrid business exchange. The result showed that first, networking of hybrid business exchange implementing enterprises affected their performance meaningfully and in strong direct proportion. Second, networking of hybrid business exchange implementing enterprises had more positive effects on performance of growing enterprises than on those of start-up enterprises. Third, weak ties were more important to performance of hybrid business exchange implementing enterprises than strong ties. Fourth, as of network scope, bigger scopes of network were more positive to performance than smaller scopes. Fifth, on frequency of contact, it was found that less frequent contacts were more positive to performance than high frequency of contacts. Lastly, trust on the network`s root was found to affect the performance meaningfully and in strong direct proportion. Since this study provides an empirical analysis of performance of hybrid business exchange implementing enterprises based on network theory, the result herein is significant in that it corresponds to the stream of times of fusion and complexity, analyzes networking of hybrid business exchange implementing enterprises by subdividing it into segments such as years of industry, nature of ties, scope, frequency and trust for the first time domestically, and in that it provides practical information about optimality of networking to entrepreneurs who seek ways and solutions through hybrid business exchange.
폐암의 진단 검사 중 기관지 세척액에서 ThinPrep검사법과 기존의 세포검사법의 유용성에 대한 비교
김상훈 ( Sang Hoon Kim ),김은경 ( Eun Kyung Kim ),시계동 ( Kyeh Dong Shi ),김정현 ( Jung Hyun Kim ),김경수 ( Kyung Soo Kim ),유정환 ( Jeong Hwan Yoo ),김주영 ( Joo Young Kim ),김광일 ( Gwang Il Kim ),안희정 ( Hee Jung An ),이지현 대한결핵 및 호흡기학회 2007 Tuberculosis and Respiratory Diseases Vol.62 No.6
연구배경: ThinPrep®검사는 원심분리를 통해 불필요한 혈액이나 점액들을 제거, 선택적으로 진단에 필요한 다량의 세포들만 모아 기존의 세포검사의 한계를 극복하여 진단율을 높일 수 있는 것으로 알려져 있으며, 현재 여러 분야에서 암의 조기 진단 방법으로 사용되고 있다. 본 연구는 기관지 세척액의 ThinPrep®검사와 기존의 세포검사의 진단율을 비교하여 ThinPrep®검사의 유용성에 대해 알아보고자 시행하였다. 방법: 2002년 1월부터 2006년 12월까지 기관지 내시경 검사를 시행한 1,116명의 환자 중 암세포에 대한 검사가 필요하다고 판단되었던 790명의 기관지 세척액 검체를 대상으로 세척액을 양분하여 기존의 세포검사와 ThinPrep® 검사를 시행하였다. 결과: 대상환자는 남자 446명, 여자 344명이었고 평균나이는 58.3(±16.7)세였으며, 이 중 197명이 기관지 내시경이나 경피적 폐생검 등의 표준진단방법을 통해 암을 진단 받았다. 암의 진단에 있어 ThinPrep®검사는 민감도 71.1%, 특이도 98.0%, 양성 예측도 92.1%, 음성 예측도 91.1%, 위음성률 8.9%였다. 기존의 세포검사의 경우에는 민감도 57.9%, 특이도 98.0%, 양성 예측도 90.5%, 음성 예측도 87.5%, 위음성률 12.5%였다. 중심형 병변인 경우 ThinPrep®의 민감도는 82.8%였고 세포검사의 민감도는 70.1%였다. 결론: 기관지 세척액 검체를 대상으로 한 폐암의 진단에 있어서 ThinPrep®검사는 기존 세포검사에 비해 민감도가 높았으며 낮은 위음성률을 보였다. 이와 같은 결과는 폐암의 조직학적 분류와 상관 없이 나타났고, 특히 중심형 병변일 경우의 민감도는 ThinPrep® 검사법에서 매우 높게 나타났다. 따라서 기관지 세척액 검사에서 ThinPrep® 을 활용할 경우 폐암의 진단율을 높이는데 기여할 수 있을 것으로 생각된다. Background: A ThinPrep® Processor was developed to overcome the limitations of conventional cytology and is widely used to diagnose various cancers. This study compared the diagnostic efficacy of conventional cytology for lung cancer with that of the ThinPrep® cytology using the bronchial washing fluid. Methods: The bronchial washing fluid of 790 patients from Jan. 2002 to Dec. 2006, who were suspected of gaving a lung malignancy, was evaluated. Both ThinPrep® and conventional cytology were performed for all specimens. Result: Four hundred forty-six men and 344 women were enrolled in this study, and 197 of them were diagnosed with cancer from either a bronchoscopic biopsy or a percutaneous needle aspiration biopsy. ThinPrep® cytology showed a sensitivity, specificity, positive predictive value, negative predictive value and false negative error rate of 71.1%, 98.0%, 92.1%, 91.1%, 8.9%, respectively. The conventional cytology showed sensitivity, specificity, positive predictive value, nagative predictive value and false negative error rate of 57.9%, 98.0%, 90.5%, 87.5%, 12.5%, respectively. For central lesions, the sensitivity of conventional cytology and ThinPrep® were 70.1% and 82.8%, respectively. Conclusion: ThinPrep® cytology showed a higher sensitivity and lower false negative error rate than conventional cytology. This result was unaffected by the histological classification of lung cancer. Therefore, ThinPrep® cytology appears to be a useful method for increasing the detection rate of lung cancer in bronchial washing cytology test. (Tuberc Respir Dis 2007; 62: 523-530)
유정환,전수일,김영구,최유진,정한길,문태기,한승경 대한피부과학회 2000 大韓皮膚科學會誌 Vol.38 No.8
Verruciform xanthoma is a rare benign lesion characterized by verrucous epidermal hyperplasia with aggregates of foam cells in dermal papillae. The pathogenesis is still unknown. Although most verruciform xanthoma tend to occur as isolated lesions, several have been associated with other conditions including squamous cell carcinoma and epidermal atypia. We describe a case of verruciform xanthoma associated with epidermal atypia.
유정환,전수일,심정연,박욱화,위성호,장성남 대한피부과학회 2000 大韓皮膚科學會誌 Vol.38 No.9
Aneurysmal fibrous histiocytoma(AFH) is a histologic variant of dermatofibroma. The importance of the recognition of AFH as a variant of dermatofibroma lies in the differential diagnosis because the histologic appearance of AFH is uery similar to dermatofibrosarcoma protuberans and other vascular malignancies, such as Kaposis sarcoma and angiosarcoma. A 32-year-old man was seen for a nodular mass on the right popliteal fossa of 4 years duration. The excisional biopsy specimen showed a relatively well circumscribed tumor mass in the detmis. In addition to compact storiform proliferation of spindle cells, there were multiple, irregular, blood-filled, aneurysmal tissue spaces that were devoid of lining of endothelial cells. Also, deposition of hemosiderin was prominent, particularly in the periphery of the aneurysrnal spaces. Immunohistochemical stain for CD34 were negative to most tumor cells. After excisional therapy, there was no evidence of recurrence during the period of ten months follaw-up.
경제의 민주화와 시장사회주의(Market Socialism) : the case of market socialism
유정환 청주대학교 사회과학연구소 2004 한국사회과학연구 Vol.26 No.1
민주주의 이론에 관한 담론들 중 민주주의의 경제적 한계에 대한 논쟁은 매우 중요하다. 본 연구는 이 문제에 대한 신자유주의적 입장을 파악하고 이를 사회주의자들 및 사회민주주의자들의 주장과 대비해 보고 뒤이어 20세기의 사회주의의 실패와 사회민주주의의 좌절이 경제의 민주화 담론에 대한 합의를 살펴보았다. 이어서 영국 좌파를 중심으로 논의되고 있는 시장사회주의가 신자유주의가 설정하고 있는 민주주의의 경제적 제한을 극복할 수 있는 대안이 되는지를 가늠해보았다. Within debates about democratic theory, questions concerning whether there are necessary economic limits to democracy are surely among the most important. This study seeks to set out the neo-liberal case for economic limits to democracy and counter poses this to the arguments of socialists and social democrats. After a brief analysis of the failures of socialist democracy, this study asks whether some form of market socialism might overcome the economic limits to democracy perceived in the neo-liberalism.
유정환,박욱화,진상현,한승경,위성호,장성남 대한피부과학회 2000 大韓皮膚科學會誌 Vol.38 No.9
We report a case of primary cutaneous adenoid cystie carcinoma in a 39-year-old male patient. It was a slightly erythematous hard nodule on left chin and composed of cribriform and tubular masses of basaloid cells. Lumina formed by neoplastic cells contained mucin and hyalin, and similar constituents were located between neoplastic cell masses and adjacent dermis. Immunohistochemically, the neoplastic cells stained only focally with S-100 protein and negative with carcinoembryonic antigen(CEA). Therapy should employ wide surgical excision that extends well beyond the clinical confines of the neoplasm.