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백종범,한정석,장은영,김용범,최자영,이수원,Baik, Jong-Bum,Han, Chung-Seok,Jang, Eun-Young,Kim, Yong-Bum,Choi, Ja-Young,Lee, Soo-Won 한국정보처리학회 2012 정보처리학회논문지B Vol.19 No.4
소비자 행동이론에 따르면 사람의 성향은 향상초점과 예방초점이라는 두 가지 조절초점 유형으로 나누어지며, 이 두 가지 성향은 다양한 영역에 있어서 소비자의 의사결정에 많은 영향을 미치는 것으로 알려져 있다. 본 연구에서는 개인화 추천에서 Cold Start 문제의 최소화 및 추천 알고리즘 성능 개선을 위하여 조절초점이론을 적용한다. 이를 위하여, 웹쇼핑 로그로부터 소비자 별 행동변수, 정보탐색활동성 지수를 추출하고 이를 활용한 소비자 조절초점성향 분류 방법을 제안한다. 본 연구는 사회과학/IT 융합 연구로서 소비자행동 이론의 시스템화 가능성을 입증하였다는 점에 있어서 의의를 지니며, 향후 다양한 분야의 이론들을 적용한 IT 서비스에 대한 연구로 확장하고자 한다. According to consumer behavior theory, human propensity can be divided into two regulatory focus types: promotion and prevention. These two types have much influence on the consumer's decision in many diverse areas. In this research, we apply regulatory focus theory to personalized recommendation to minimize the cold start problem and to improve the performance of recommendation algorithms. To achieve this goal, we extract the consumer behavior variables and information exploration activity index from web shopping logs. We then use them for classifying regulatory focus of the consumer. This research has the contribution to show the possibility of systematization of consumer behavior theory as an interdisciplinary research tool of social science and information technology. Based on this attempt, we will extend the research to IT services adapting theories on other areas.
Scalable production of heteroatom-doped graphene nanoplatelets
백종범 한국공업화학회 2014 한국공업화학회 연구논문 초록집 Vol.2014 No.1
Scalable production of two-dimensional (2D) layered crystals now becomes an important challenge for many applications including energy conversion and storage. In this work, an efficient approach for the largescale synthesis of 2D layered crystals and their applications for energy conversion and storage will be discussed. The method involves scalable synthesis of 2D crystals by mechanochemically driven reaction and/or polycondensation between Ax and By monomers (x>2, y≥2). The resultant 2D crystals are expected to display outstanding electrochemical performance. Our findings suggest that newly-developed 2D crystals can be simply designed, prepared and used as base materials for a wide range of applications from wet-chemistry to device applications.
갑상선 수술 환자에서 세침흡인 세포검사와 조직검사와의 연관성
백종범,김성철,배금석,강성준,Jong Beom Baek,M.D.,Sung Chul Kim,M.D.,Keum Seok Bae,M.D. and Seong Joon Kang,M.D. 대한갑상선-내분비외과학회 2009 The Koreran journal of Endocrine Surgery Vol.9 No.4
Purpose: Fine needle aspiration cytology (FNAC) has become a standard diagnostic tool for thyroid nodules. The purpose of this study is to analyze the correlation between FNAC and the final histology to improve the diagnostic value. Methods: We collected 792 patients who had undergone thyroidectomy, and we selected 549 patients who had undergone preoperative FNAC. The FNAC results were classified as non-diagnostic, malignancy, indeterminate and benign. The final pathologic reports were classified into two categories: malignant or benign. The individual histology was also identified. We retrospectively analyzed the pathologic result, the sensitivity, the specificity and the predictive value of the FNAC. Results: Among 549 patients, their FNACs showed 47 non diagnostic results, 189 malignancies,136 indeterminate results and 177 benign results. The false positive rate was 1.1% and the false negative rate was 12.9%. The final pathology reports were 262 malignancies and 287 benign lesions. There were 42 (30.9%) malignancies among the 136 indeterminate cases. Adenomatous hyperplasia was the most common benign lesion and papillary carcinoma (containing micropapillary carcinoma) was the most common benign lesion. Conclusion: FNAC is an easy and safe diagnostic tool, but it still has many limitations. It is necessary to reduce the number of non diagnostic results. Technical advances, classification of the advanced categories of cytology and other staining methods can provide more specific results, and this can reduce the rate of performing unnecessary surgery. (Korean J Endocrine Surg 2009;9:223-227)