• Title/Summary/Keyword: 우연

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Incidental Benign Parotid Lesions on FDG-PET: Prevalence and Clinico-pathologic Findings (FDG-PET 검사시 우연히 발견한 양성 이하선 병변: 유병율과 임상 및 병리 소견)

  • Lim, Il-Han;Lee, Won-Woo;Chung, Jin-Haeng;Park, So-Yeon;Kim, Sang-Hee;Kim, Yu-Kyeong;Kim, Sang-Eun
    • Nuclear Medicine and Molecular Imaging
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    • v.41 no.5
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    • pp.359-363
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    • 2007
  • Purpose: Incidental parotid lesions on F-18 FDG-PET can mimic distant metastasis of underlying malignancy. The prevalence and the clinico-pathologic findings of PET positive parotid lesions have not been known. We investigated how often incidental parotid lesions are found on clinical FDG-PET studies and what the clinico-pathologic characteristics of those parotid lesions are in the present study. Materials and Methods: We retrospectively reviewed 3,344 cases of FDG-PET which had been obtained in our hospital from May 2003 to Dec 2006. The indications of FDG-PET were: evaluation of known/suspected cancer (n= 3,212) or screening of cancer in healthy subjects (n=132). Incidental parotid lesion on FDG-PET was defined as an un-expected FDG uptake in one of parotid glands which was not primary target lesion of current FDG-PET. FDG uptake was represented by maximum standardized uptake value (maxSUV). Final diagnosis was made by pathologic analysis or clinical follow-up assessment. Results: Fifteen (0.45% = 15/3,344) incidental parotid lesions were found and they were all benign lesions. The maxSUV ranged from 1.7 to 8.6 (mean${\pm}$s.d. = $3.7{\pm}1.9$). Final diagnoses of the incidental parotid lesions were; Warthin's tumor (n=2), pleomorphic adenoma (n=1), other un-specified benign lesion (n=1), and benign lesions under bases of imaging studies (n=3) and of clinical follow-up (n=8). Conclusion: All of incidentally found parotid lesions in clinical FDG-PET studies were confirmed as benign lesions with prevalence of 0.45%. Close follow up using PET or CT might be a reasonable approach for determining the nature of incidentally found parotid lesions.

Analysis of Relative Importance on Evaluation Elements of Library Discovery (도서관 디스커버리의 평가요소에 대한 상대적 중요도 분석)

  • Kim, Seonghee
    • Journal of the Korean Society for Library and Information Science
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    • v.54 no.2
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    • pp.399-417
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    • 2020
  • In this study, we tried to analyze the relative importance of features for various functions provided by Discovery. We identified a total of 36 assessment items in five categories including contents, search function, serendipity, interactivity, and ease of use based on literature review. In order to objectively evaluate the relative importance of each evaluation element, an AHP technique was adopted. As a result, 'Easy of use' received the highest weighted value among the five categories, followed by 'contents', 'search function', 'interactivity', and 'serendipity'. In addition, among all the 36 assessment items, 'Quality of data for central index' had higher weighted value. These findings can be used as basic data to adopt a discovery tool for libraries.

A Study on the Business Opportunity Source and Search According to the Characteristic of Entrepreneur (창업자 특성과 사업기회의 상황 간에 관한 연구)

  • Seol, Byung Moon;Hong, Hyo Seog
    • Asia-Pacific Journal of Business Venturing and Entrepreneurship
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    • v.8 no.1
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    • pp.19-28
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    • 2013
  • This study emphasize the importance of founder having knowledge on detecting entrepreneurship opportunities and analyzed how the founder detects such opportunity using what process. I used people who have found and established a company on own as a survey sample. The result is like the following. First, it's found that most founders had business motivation before the establishment and used skills and knowhow from related area of business for their business establishment that led to the comparably safe business. Second, founders were highly motivated in advance of business establishment and it is found that their chance of establishment was not from the coincidence. Third, it is also found that people had pre-education on business establishment was very on purpose and those who had not had any education had a high chance of coincidence in the establishment. Fourth, it is found that higher the desire for the business achievement, more likely that the founder's business establishment was a plan. Fifth, it is found that higher the awareness of business opportunity and vision, more likely that the founder's business establishment was on plan.

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Incidental Breast Lesions on Chest CT: Clinical Significance and Differential Features Requiring Referral (흉부 전산화단층촬영에서 우연히 발견된 유방 병변: 임상적 중요성 및 진료 의뢰가 필요한 특징적 영상 소견)

  • Choi, Yun Jung;Kim, Tae Hoon;Cha, Yoon Jin;Son, Eun Ju;Gweon, Hye Mi;Park, Chul Hwan
    • Journal of the Korean Society of Radiology
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    • v.79 no.6
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    • pp.303-310
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    • 2018
  • Purpose: To evaluate the CT features of incidental breast lesions on chest CT and to suggest useful criteria for referral to a specialized breast unit. Materials and Methods: Between May 2009 and April 2014, enhanced chest CT examination reports containing the key word 'breast' were reviewed retrospectively. Patients who had incidental breast lesion and were referred to a specialized breast unit and then underwent pathological confirmation or follow-up over a 1-year period were included. Finally, 86 patients (all female, mean age, $48.9{\pm}12.6years$) were enrolled. Two radiologists evaluated lesion characteristics, including size, shape, margins, and enhancement. The correlations between the CT features and pathologies were evaluated, and the diagnostic accuracy of CT features in various combinations was assessed. Results: Among the CT features, irregular shape, non-circumscribed margin, and high contrast enhancement were different between malignant and benign lesions (p < 0.05). The combination of non-circumscribed margin and high contrast enhancement had the highest accuracy (97.7%). Conclusion: Reliable CT features for incidental malignant breast masses are irregular shape, non-circumscribed margin, and high contrast enhancement. The combination of non-circumscribed margin and high contrast enhancement could help distinguish incidental malignant breast lesions and indicate referral to a specialized breast unit.

Meditating effect of Planned Happenstance Skills between the Belief in Good luck and Entrepreneurial Opportunity (행운에 대한 신념과 창업 기회 역량과의 관계에서 우연기술의 매개효과에 관한 연구)

  • Hwangbo, Yun;Kim, YoungJun;Kim, Hong-Tae
    • Asia-Pacific Journal of Business Venturing and Entrepreneurship
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    • v.14 no.5
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    • pp.79-92
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    • 2019
  • When asked about the success factors of successful entrepreneurs and celebrities, he says he was lucky. The remarkable fact is that the attitude about luck is different. However, despite the fact that the belief that we believe is lucky is actually a dominant concept, there has not been much scientific verification of luck. In this study, we saw good luck not being determined randomly by the external environment, but by being able to control luck through the internal attributes of individuals. This study is significant that we have empirically elucidated what kind of efforts have gained good luck, whereas previous research has largely ended in vague logic where luck ends up with an internal locus of control among internal entrepreneurial qualities and efforts can make a successful entrepreneur. We introduced the concept of good luck belief to avoid confirmation bias, which is, to interpret my experience in a direction that matches what I want to believe, and used a good luck belief questionnaire in previous studies and tried to verify that those who have a good belief can increase entrepreneurial opportunity capability through planned happenstance skills. The reason for choosing the entrepreneurial opportunity capacity as a dependent variable was based on the conventional research, that is, the process of recognizing and exploiting the entrepreneurial opportunity is an important part of the entrepreneurship research For empirical research, we conducted a questionnaire survey of a total of 332 people, and the results of the analysis turned out that the belief of good luck has all the positive impacts of planned happenstance skills' sub-factors: curiosity, patience, flexibility, optimism and risk tolerance. Second, we have shown that only the perseverance, optimism, and risk tolerance of planned happenstance skills' sub-factors have a positive impact on this opportunity capability. Thirdly, it was possible to judge that the sub-factors of planned happenstance skills, patience, optimism, and risk tolerance, had a meditating effect between belief in luck and entrepreneurial opportunity capability. This study is highly significant in logically elucidating that people in charge of business incubation and education can get the specific direction when planning a training program for successful entrepreneur to further enhance the entrepreneurial opportunity ability, which is an important ability for the entrepreneur's success.