간 수술의 병력이 없는 환자에서 발생한 담관 원주 증후군

하승인 ( Seung In Ha ),최정식 ( Jung Sik Choi ),김영훈 ( Young Hoon Kim ),전현수 ( Hyun Soo Jun ),조용건 ( Yong Gun Jo ),이원현 ( Won Hyun Lee ),박성길 ( Seong Gill Park ),이상헌 ( Sang Heon Lee ) 대한소화기학회 2012 대한소화기학회지 Vol.60 No.6

Biliary cast describes the presence of casts within the biliary tree. It is resultant sequel of cholangitis and hepatocyte damage secondary to bile stasis and bile duct injury. Biliary cast syndrome was first reported in patient undergone liver transplantation. The pathogenesis of biliary cast is not clearly identified, but proposed etiologic factors include post-transplant bile duct damage, ischemia, biliary infection, or post-operative biliary drainage tube, Although biliary casts are uncommon, most of biliary cast syndrome are reported in the liver transplant or hepatic surgery patients. A few reports have been published about non-transplant or non-liver surgery biliary cast. We report two cases of biliary cast syndrome in non-liver surgery patients.

기계 학습에 기초한 추천시스템 알고리즘에 대한 연구

하승인(Ha, SeungYin),유영범(Yoo, Yiung Bum),정예숙(Jung, Ye Suk) 한국서비스경영학회 2017 한국서비스경영학회 학술대회 Vol.2017 No.11

Online content service providers are using recommendation systems as part of their efforts to increase sales. The recommendation system identifies and recommends the customer "s preferred content, and it helps the customer to increase the satisfaction and the loyalty of the service by using the content suitable for the user" s taste without searching the content. In this study, we propose an algorithm for selecting recommendation contents for individual customers by using the Movie Lens data. The algorithms used in the existing recommendation systems have the disadvantage that they can not utilize contents that do not exist in the data since the important words are selected from the given data and the contents are selected based thereon. On the other hand, the Latent Dirichlet Allocation algorithm is that can utilize potential keywords that are not in the data.

일반화 가법 모형을 이용한 정책금융 수혜규모가 중소기 업 경영성과에 미치는 효과성 연구

하승인 ( Seungyin Ha ),장명균 ( Myoung Gyun Jang ),이군희 ( Gunhee Lee ) 한국중소기업학회 2017 기업가정신과 벤처연구 Vol.20 No.2

본 연구는 기업의 재무상태 및 지원규모에 따른 정책금융지원의 효과를 파악하기 위하여 일반화가법모형을 적용하여 실증분석 하였다. 이를 위해 이자보상배율과 총자산 대비 신규보증금액 비율을 이용하여 업종별로 분석대상을 구분하였으며, 수익성, 성장성지표를 사용하여 경영성과를 측정하였다. 또한 분석기간에 여러 번의 정책금융을 지원받은 기업의 경우 표본선택편의로 인한 결과의 왜곡이 발생할 수 있으므로 중복지원 효과를 최소화하기 위해 지원연도를 기준으로 이전 3년 동안 보증잔액 및 신규보증이 없으며, 이후 2년동안 신규보증이 없는 기업을 선정하였다. 분석 결과, 보증시점의 이자보상배율이 1 미만이라 하더라도 지원규모에 따라 성과는 차별화되는 것을 확인할 수 있었다. 또한 한계기업의 기준으로 사용되는 이자보상배율이 0에 근사한 기업이더라도 경영성과는 향상될 수 있음을 확인할 수 있다. 결국 본 연구에서는 정책금융 지원정도에 따른 차별적인 경영성과를 확인함으로써 기술력이나 성장 잠재력을 고려한 평가가 요구되며 이를 통해 정책금융을 지원하는 담보가 부족한 중소기업의 자금조달 문제를 완화할 수 있는 유인책으로서의 작용할 수 있음을 시사하고 있다. The aims of this study is to analyze the effectiveness of firms financial status quo and the scale of financial support on SMEs overall performance. We have gathered the financial guarantee data from 1998 to 2013, provided by Korea Credit Guarantee Fund (KODIT), to analyze the effectiveness of Financial policy. To classify both financial status quo and scale of financial support, we utilized the following variables; Interest Coverage Ratio (ICR) and newly guaranteed amount ratio. To take the measurement of the overall performance, we employed profitability, growth ratio and activity index. To minimize the effect of repeated financial support (redundancy benefits), firms were selected based on the following criteria: firms that receive no financial support prior to implementing such policy over the last 3 years and no new financial support over the last 2 years. Results suggest that firms with higher ICR and large newly guaranteed amount influence on financial performance in terms of profitability index. Firms with lower ICR and large scale financial support showed a better performance compare to firms with small-scale financial support. Firms with large-scale financial support, irrespective of ICR inclined to have better performance to those of small-scale financial support in terms of growth index. For activity index, however, firms with large scale support led to higher performance in the short term. In turn, our analysis presents objective perspective with respect to the effectiveness of financial policy through credit guarantee on overall performance of SMEs. This study, therefore, implies that well-balanced SMEs supporting policy may lead to better directions.

기업의 지속가능경영 활동이 기업의 장단기적 가치에 미치는 영향

민재형(Jae Hyung Min),하승인(Seung Yin Ha),김범석(Bum Seok Kim) 한국경영학회 2014 한국경영학회 통합학술발표논문집 Vol.2014 No.8

본 연구에서는 지속가능경영을 위한 기업의 사회공헌활동이 장단기적 가치에 미치는 영향을 분석하였다. 기업의 사회공헌활동을 측정하기 위한 변수로는 재무제표 상의 기부금 항목과 GRI(Global Reporting Initiative) 가이드라인에 따른 제3자 인증 지속가능보고서 발간여부를 이용하였고, 기업의 단기적 가치는 로그주식수익률로, 장기적 가치는 토빈큐(Tobin``s Q)로 측정하였다. 지속가능보고서의 경우, 재무제표와 달리 명확한 공시 기준이 없어 유엔 산하기관인 GRI 가이드라인을 준수하는 제3자 검증 보고서로 국한하였고, 2008년부터 2013년까지 6개년 간 금융업을 제외한 상장기업을 대상으로 분석을 수행하였다. 분석결과, 장기적 가치를 나타내는 토빈큐의 경우 기부금지출뿐만 아니라 지속가능보고서도 함께 발간하는 기업이 기부금만 지출하는 기업보다 높은 성과를 보임을 확인하였고, 기부금지출 및 지속가능보고서 발간 모두를 수행하지 않는 기업은 기부금만 지출하는 기업보다 낮은 성과를 나타냄을 확인하였다. 단기적 가치를 나타내는 로그주식수익률의 경우, 기부금지출과 지속가능보고서 발간을 함께 하는 기업은 기부금지출만 하는 기업과 통계적으로 의미 있는 성과 차이를 보이지 않았으나, 기부금지출과 지속가능보고서 발간 모두를 행하지 않는 기업은 기부금만 지출하는 기업보다 성과가 낮음을 확인할 수 있었다. 아울러 사회공헌활동의 지속성이 기업의 장기적 가치에 미치는 영향을 확인한 결과, 연구대상 기간 동안 경기침체로 인해 많은 기업들의 가치가 하락했음에도 불구하고, 사회공헌활동을 지속적으로 행한 기업의 가치는 점차 향상되는 것을 확인할 수 있었다. 이는 기업의 지속적인 사회공헌활동이 건전한 기업 생태계를 조성함으로써 개별 기업도 장기적으로 지속 가능한 성장을 이룰 수 있음을 함의한다.

원저 : 폐암 환자에서 촉진되지 않는 경부 림프절에 대한 초음파 유도 하 세침흡인 세포검사의 유용성

김희규 ( Hee Kyoo Kim ),하승인 ( Seung In Ha ),김유리 ( Yu Ri Kim ),박찬복 ( Chan Bog Park ),옥철호 ( Chul Ho Oak ),장태원 ( Tae Won Jang ),정만홍 ( Maan Hong Jung ),오경승 ( Kyung Seung Oh ),천봉권 ( Bong Kwon Chun ),이민기 ( Min 대한결핵 및 호흡기학회 2004 Tuberculosis and Respiratory Diseases Vol.56 No.5

비모수 방법을 이용한 SCM 현금화주기와 동반성장과의 관계

김범석 ( Bum Seok Kim ),하승인 ( Seung Yin Ha ),민재형 ( Jae Hyung Min ) 한국로지스틱스학회 2013 로지스틱스연구 Vol.21 No.1

본 연구에서는 기업의 SCM 성과가 동반성장과 어떠한 관계에 있는지를 비모수 방법을 통해 확인한다. 2011년 동반성장위원회에서 발표한 56개 대기업의 동반성장지수 등급과 회계계정을 통해 산출 가능한 SCM의 운영효율성 지표인 현금화주기와의 관계를 비모수 검정을 이용하여 규명한다. 아울러 현금화주기와 기업의 재무성과, 동반성장지수와 기업의 재무성과의 관계도 각각 실증한다. 연구결과, 현금화주기와 동반성장지수 간에는 일반적인 통념과는 달리 통계적으로 유의한 상관관계가 없었다. 또한 분석 대상인 매출규모가 큰 대기업의 경우, 선행연구와는 달리 현금화주기와 재무성과는 인과관계가 없었으며, 오히려 동반성장지수가 좋을수록 재무성과가 향상된다는 결과를 얻을 수 있었다. 본 연구는 그동안 중소기업 중심으로 이루어져왔던 동반성장에 대한 연구를 대기업 중심으로 진행하였다는 점에서 의의를 가지며, 대기업의 경우 단순히 비용절감을 위한 수단으로서가 아니라 SCM의 본질적 취지인 동반성장을 위한 노력을 기울일 때 재무적인 성과도 가져올 수 있음을 알 수 있었다. This study aims to identify the relationship between SCM (Supply Chain Management) performance and win-win growth, and to show the effect of SCM performance and that of win-win growth on the financial performance of large firms respectively. In particular, for the empirical test, we used financial data of the 56 companies as of year 2011. We employed Kruskal-Wallis test to figure out the statistical relationship between cash-to-cash cycle time, a SCM performance index for operational efficiency, and win-win growth index. In addition, we conducted additional analyses to show the impact of cash-to-cash cycle time and that of win-win growth index on the financial performance measured by ROA (return on asset) and ROS (return on sales). The result of the study shows that there is no significant statistical relationship between cash-to-cash cycle time and win-win growth index, which implies the Korean large firms realize SCM as a method largely for improving operational efficiency. Also, the result shows that unlike the claims of previous literature, cash-to-cash cycle time turns out to give no signifiant impact on the firms’financial performance. On the contrary, there exist significant differences in both terms of ROA and ROS according to win-win growth index. Moreover, we found out the empirical trend that the higher the win-win growth index is, the better the financial performance is. From the result, we claim that the large firms in particular, should recognize the original intention of SCM and focus their effort more on win-win growth for mutual prosperity to become sustainable ones.

기업의 지속가능경영 활동이 기업의 장단기적 가치에 미치는 영향

민재형(Jae H. Min),하승인(SeungYin Ha),김범석(Bumseok Kim) 한국경영학회 2015 經營學硏究 Vol.44 No.3

In recent years, the paradigm of business is changing from maximization of shareholders wealth to sustainability management that creates a shared value for all stakeholders. According to the paradigm shift, business societys interest in CSR (corporate social responsibility) has increased. Firms and other organizations have started measuring their environmental, social, and governance performance, which can be observed through the publishing of sustainability reports that inform various stakeholders of the firms’ successes in sustainable management practices. To examine how CSR impacts a firm’s short-term and long-term values, this study attempts to confirm whether there are statistically significant differences in the long-term and short-term corporate values between companies that have and have not implemented social contribution activities, employing variables such as corporation donations and third-party verified sustainability reports based on GRI guidelines. The target companies have been maintained in the Korea securities market for a six year period from 2008 to 2013. For empirical analysis, the dummy variable of donations expenditure, issuing third-party verified sustainability reports, and the other control variables are used as independent variables. For the dependent variable, we employ stock log return as the proxy of each firm’s short-term value, and Tobins Q ratio as that of its long-term value. Also, two-factor ANCOVA was performed with repeated measurements on one-factor analysis to check the impact of continuity of social contribution activities on the long-term value of the firms. The results show that Tobins Q ratio of firms making donation contributions as well as issuing sustainability reports is significantly higher than that of those companies that are only making the donation expenditures. Furthermore, companies that do not issue any sustainability reports and do not make donation contributions had statistically lower Tobins Q ratios than the companies with donation expenditure. In the case of the stock log returns, there was no statistically significant difference between the companies with donation expenditure and the companies that both issue sustainability reports and have donation expenditure. However, it is shown that the companies without those two activities at all has significantly lower performance than the companies with donation expenditure. These results imply that the donation expenditure alone would be enough to enhance the corporate image for investors recognition, leading to preferable investment decisions while the sustainability reports serve as medium of effective communication among stakeholders inducing the enhancement of corporate long-term values. Also, the analysis regarding long-term effects of the persistency of social contribution activities on the corporate value shows that the pure effect of social contribution activities has increased gradually, even though the market environment was not in good condition during the six year period from 2008 through 2013. This result implies the companies would be able to enhance their long-term values through social contribution activities for a variety of stakeholders including employees, customers, suppliers and local communities, which clashes with the conventional business activities that consider only the interests of shareholders. In addition, the continued issuance of third-party verified sustainability reports makes the companies present the outcomes of their social contribution activities to investors, which may lead to friendly investment decisions. Moreover, this result would motivate the companies that do not currently participate in social contribution activities to engage in those activities in the form of direct investment and donation expenditures.

열악한 조명 환경을 위한 자동 크로마키 시스템 구현

황지순(Ji-Sun Hwang),최승인(Seung-In Choi),하진영(Jin-Young Ha) 한국정보과학회 2009 한국정보과학회 학술발표논문집 Vol.36 No.2B

객체와 단색배경을 분리하여 새로운 영상을 합성시키는 크로마키 기법은 배경 조명에 따른 제약이 많다. 또한, 배경과 피사체 사이의 거리가 가까울 경우 그림자가 생기는 상황을 고려해야 한다. 본 연구에서는 이를 그래픽에 반영하여 실사와 합성하는 실시간 시스템을 구축하고 실험으로 우수한 성능을 확인하였다. 배경영상이 정해놓은 시간에 따라 순차적으로 바뀌게 하고 PC 마우스나 키보드 대신에 영상을 통하여 간단한 제어를 할 수 있게 하였다. 단색 배경 영상의 검출과 그림자를 제거 후 객체를 추출하고 사용자가 선택한 영상과 합성한다. 또한 손 인식 시스템으로 사용자와 컴퓨터 간의 상호작용이 가능하여 교육시스템 등에 유용하게 쓰일 수가 있다.

지속가능경영을 위한 기업의 환경적, 사회적, 지배구조적 요인이 주가수익률 및 기업 가치에 미치는 영향

민재형(Jae H. Min),김범석(Bumseok Kim),하승인(Seungyin Ha) 한국경영과학회 2014 한국경영과학회지 Vol.39 No.4

This study empirically examines the impact of firms’ environmental (E), social (S), and governancial (G) factors on their short-term and long-term values. To measure firms’ non-financial performance, we use ESG performance grades published by KCGS (Korea Corporate Governance Service). We employ stock log return as the proxy of each firm’s short-term value, and Tobin"s Q ratio as that of its long-term value. From a series of regression analyses, we find each of the ESG factors generally has a negative impact on stock return while it has a positive impact on the Tobin"s Q ratio. These results imply that firms’ effort for enhancing their non-financial performance may adversely affect their financial performance in a short term; but in the long-term point of view, firms’ values increase through their good images engraved by their respective social, environmental and governancial efforts. In addition, we compare the relative strength of impact among E, S, G, the three non-financial factors on the firms’ value measured in Tobin’s Q ratio, and find that S (social factor) and G (governancial factor) give statistically significant impact on the firms’ value respectively. This result tells us it would be advised to strategically embed CSV (creating shared value) pursuing both of profits and social responsibility in the firms’ future agenda. While E (environmental factor) is shown to be an insignificant factor for the firms’ value, it should be emphasized as a major concern by all the stakeholders in order to form a sound business ecosystem.

기업의 환경, 사회, 지배구조 요인과 재무성과의 관계

민재형(Jae H. Min),김범석(Bumseok Kim),하승인(Seungyin Ha) 한국경영과학회 2015 經營 科學 Vol.32 No.1

We examine the relationship between firms" environmental (E), social (S), and governance (G) factors, with their financial performance in order to provide an empirical rationale for CSV (creating shared value) pursuing both of firms’ profitability and CSR (corporate social responsibility). The financial performance is classified into four aspects such as profitability, stability, efficiency, and cash-flow, and each of these aspects is measured by two financial ratios respectively. To measure the firms’ ESG performance, we employ the published performance grades by the Korea Corporate Governance Service for a three year span, from 2011 to 2013. Total of eight regression analyses are performed. The results show that firms" non-financial performance in general has statistically significant positive relationships with return on assets, return on net sales, and cash-flow from operating activities ratio, while it has negative relationships with net working capital ratio, asset turnover ratio, and cash-flow from investing activities ratio. It has no significant relationships with debt ratio and equity turnover ratio. The results imply that firms" non-financial performance may have a negative impact on some financial performance such as liquidity and efficiency in a short term, but it would eventually improve the firms’ profitability and cash-generating ability, which provides an empirical evidence for the concept of CSV, and motivates the firms to participate in social contribution activities without sacrificing their profitability for their respective sustainablity management.