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Analysis of trends on patents for unmanned technology used in agriculture
이충한,김완수,최창현,노현석,홍순중 충남대학교 농업과학연구소 2018 Korean Journal of Agricultural Science Vol.45 No.1
This study analyzed the trends of patents for unmanned technology used in agriculture. The target countries for this survey of patent data were Korea, the USA and Japan as well as the countries in Europe. The indices used in this study to analyze the patents were the CPP (Cites Per Patent), PII (Patent Impact Index), and PFS (Patent Family Size). The total effective patents for unmanned technology used in agriculture were 1,080 cases. The number of patents in the USA, Japan, Europe, and Korea were 541, 326, 128 and 85 cases, respectively. Among the total effective patents, the evaluation scores for selected important patents were calculated by applying commonly used weights to each index, and the top 10 patents were selected as important patents. The results showed that all the top ten patents are owned by the United States and that the United States is an advanced country in the field of unmanned technology used in agriculture. The evaluation score of the important patents using the existing method was biased toward the PII index among the three patent evaluation standards, and the effects of the number of claims and the PFS were relatively small. Therefore, a reliable patent analysis in the field of unmanned technology used in agriculture needs to reflect the overall evaluation factors taking into consideration the scope of the evaluation factors.
유방엽상종의 국소재발과 관련된 임상적 병리학적 위험인자
이충한 한국유방암학회 2007 Journal of breast cancer Vol.10 No.1
Purpose: Phyllodes tumors of the breast are biphasic neoplasms. They are composed of epithelium and a spindle cell stroma. However, there is some controversy over its clinical behavior, pathologic characteristics, and local recurrence rates. Therefore we analyzed the clinicopathological characteristics of phyllodes tumor and the risk factor that influence a local recurrence after surgery were analyzed. Methods: We retrospectively analyzed the medical records of 73 patients with a phyllodes tumor and who had undergone surgery at the Department of Surgery, Kosin University, from 1994 to 2005. The median follow up period was 73 months (range: 5-250 months). The microscopic slides were re-examined and the pathologic criteria we analyzed were cellular atypia, stromal cellularity, pleomorphism, necrosis, differentiation, the tumor margin, and the number of mitosis. The malignancy was reclassifed using the histological criteria reported by Pietruszka et at. (benign was 0-4 mitoses/10 highpower folds, borderline 5-9 mitoses, and malignant was more than 10 mitoses), The clinical features we evaluated included age, the preoperative diagnosis, the tumor size, surgical methods, and local recurrence. Results: The mean age was 38.2 yr (range: 15-60 yr) and the mean tumor size was 4.3 cm (range: 1.6-18 cm), The most commonly performed surgical procedures were local or wide excision (60 cases, 82.2%), mastectomy in 10 cases (13.7%) and MRM in 3 cases (4.1%). Out of the 73 cases we reviewed, 49 (67.1%) were confirmed as being a benign, 3 (4.1%) were borderline, and 21 (28.7%) were malignant phyllodes tumor. Cellular atypia was minimal in 55 cases (75.3%) and it was prominent in 18 cases (24.6%). The stromal cellularity was minimal in 49 cases (67.1%) and it was prominent in 24 cases (32.8%). The tumor margin was infiltrating in 27 cases (36.9%) and pushing in 46 cases (63.0%). A local recurrence developed in 12 cases (16.4%). There were no dependable histopathological features to predict a local recurrence except for stromal cellularity, and an infiltrating margin. Conclusion: From the above results, the strong prognostic factors that can be used to predict a local recurrence appear to be stromal cellularity, and an infiltrating tumor margin.
李忠漢,李承道,徐在寬,朴瑛勳,장희경,허방,허만하 고신대학교 의학부 1988 高神大學校 醫學部 論文集 Vol.4 No.1
We have experienced three cases of male breast cancer in our series, 586 cases of all surgically treated breast cancer from 1970 to 1987. Pathological diagnosis covered infiltrating ductal carcinoma, intraductal carcinoma, and papillary carcinoma. One case was treated on partial mastectomy and two cases on simple mastectomy with axillary dissection. In view of academic and clinical interacts, we report three cases of male breast carcinoma along with literature review.
이충한,이성도,서재관,박영훈,장희경,허방,허만하 고신대학교(의대) 고신대학교 의과대학 학술지 1988 고신대학교 의과대학 학술지 Vol.4 No.1
We have experienced three cases of male breast cancer in our series, 586 cases of all surgically treated breast cancer from 1970 to 1987. Pathological diagnosis covered infiltrating ductal carcinoma, intraductal carcinoma, and papillary carcinoma. One case was treated on partial mastectomy and two cases on simple mastectomy with axillary dissecction. In view of academic and clinical interacts, we report three cases of male breast carcinoma among with literature review.
이충한,이승도,서재관 고신대학교 의학부 1985 高神大學校 醫學部 論文集 Vol.1 No.1
We experienced 5 cases of rare diseases involving spleen. They showed remarkable splenomegaly with mild or severe hematologic abnormalities and characteristic pathologic features. Clinical improvement followed splenectomy in all cases. They were Gaucher's disease, hairy cell leukemia, cavernous hemangioma of spleen, splenic cyst, histiocytic medullary reticulosis. A brief review of literature was made.
이충한,이승도,서재관 고신대학교(의대) 고신대학교 의과대학 학술지 1985 고신대학교 의과대학 학술지 Vol.1 No.1
We experienced 5 cases of rare diseases involving spleen. They showed remarkable splenomegaly with mild or severe hematologic abnormalities and characteristic pathologic features. Clinical improvement followed splenectomy in all cases. They were Gaucher's disease, hairy cell leukemia, cavernous hemangioma of spleen, splenic cyst, histiocytic medullary reticulosis. A brief review of literature was made.