머신러닝 기반 상권정보를 활용한 신규점포 매출 예측

하승인,김범석 한국인터넷전자상거래학회 2024 인터넷전자상거래연구 Vol.24 No.1

This study opening a new super store involves selecting an economically feasible location through screening candidate locations and estimating expected sales. Individuals or corprate businesses may have less access to sensitive information than large distribution companies, making it difficult to select an effective location. Accordingly, this study proposed a model that can predict sales of new super stores using easily accessible commercial district information. At this time, the model applied the broken-line regression method to dived the analysis object into two areas before/after the break-point, and separately estimated sales by fitting ridge regression to each area. Through this, it is expected that it will be possible to identify various relationships between sales and influencing factors. As a result of the analysis, a clear difference in relationship between the two areas appeared starting from the break-point, and the sales prediction accuracy through the regression model was also found to be at a good level.

내시경적 역행성 담관조영술 중에 발생한 식도천공에 의한 기흉 1예

하승인,김신,김유리,박찬복,이지현,윤병철,한병훈,이상욱,신동훈 고신대학교 의학부 2004 高神大學校 醫學部 論文集 Vol.19 No.1

Esophageal perforation is an extremely lethal injury that requires careful management for survival. Currently, the most common cause of the perforation is iatrogenic injury, and the incidence of esophageal perforation has increased as the use of endoscopic procedure has become more frequent. Perforation during endoscopic retrograde cholangiogram (ERC) are rare. Bile duct or duodenal perforation caused by therapeutic procedures such as endoscopic sphincterotomy, guide-wire, and biliary stent were frequently reported. However, the case of esophageal perforation developed during diagnostic ERC was very rare and there has not report in Korea yet. A 61-year-old man was admitted for the evaluation of upper abdominal pain. He suspected bile duct dilatation and common bile duct stone by ultrasongraphy. During the diagnostic ERC, endoscopy showed structure of pleural cavity. We suspected esophageal perforation, and then checked esophagogram, neck and chest CT. The CT showed right side pneumothorax and left parapharyngeal and retropharyngeal air shadow. We diagnosed esophageal perforation accompanied with pneumothorax. He was successfully treated with medical treatment for 10 days.

Effects of Indirect Financial Policy for Sustainability of Small and Medium-sized Enterprises in Korea in Business Fluctuation Cycle

하승인,김현옥,이명주 한국경영컨설팅학회 2023 경영컨설팅연구 Vol.23 No.6

Financial policy in Korea is designed to support the sustainable growth and stability of small and medium-sized enterprises (SMEs). Many studies have investigated the effectiveness of this financial support policy; however, previous studies only focused on the effects of policy financial support and did not consider sample bias of evaluating the program. Therefore, these studies do not have a consistent conclusion. The reason why many studies do not have consistent research results is that distortion effects by sample selection bias occur when analyzing the effect of policy financial support. Main reasons for this lack of clarity include distortions caused by sample selection bias, particularly when analyzing the impact of loan policy. The first effect is sample selection bias regarding companies with and without indirect financial support. While it is necessary to compare the performances of companies that receive indirect financial support with those that do not, hidden counterfactual conditions can impact the results of policy effects depending on which companies are evaluated. The second effect is due to natural business cycles because small and medium-sized enterprises (SMEs) are more affected by business fluctuations than larger companies. If policy effects are evaluated without considering economic fluctuation, such effects will be diluted by cycle consequences. We avoided these pitfalls by selecting sample companies using a propensity score matching (PSM) methodology to minimize distortion caused by sample selection bias. We use a difference-in-difference (DID) method to analyze policy effects for each stage of the business cycle between 1998 and 2013, all of which were verified in advance by KOSTAT. This study minimized sample selection bias to evaluating support policy and determine its effectiveness in accordance with normal economic fluctuations. Results demonstrated that SMEs receiving indirect financial support showed better financial performance than those that did not. Evidence of a business cycle responsiveness effect was also uncovered, as we found that policy effects are stronger when the business cycle is in a contraction period.

Squalene 복용 후 발생한 지방성 폐렴 1례

하승인,이시원,김주훈,양성우,옥철호,장태원,정만홍 대한결핵 및 호흡기학회 2003 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.97 No.0

내시경적 역행성 담관조영술 중에 발생한 식도천공에 의한 기흉 1예

하승인,김신,김유리,박찬복,이지현,윤병철,한병훈,이상욱,신동훈 고신대학교(의대) 고신대학교 의과대학 학술지 2004 고신대학교 의과대학 학술지 Vol.19 No.1

Esophageal perforation is an extremely lethal injury that requires careful management for survival. Currently, the most common cause of the perforation is iatrogenic injury, and the incidence of esophageal perforation has increased as the use of endoscopic procedure has become more frequent. Perforation during endoscopic retrograde cholangiogram (ERC) are rare. Bile duct or duodenal perforation caused by therapeutic procedures such as endoscopic sphincterotomy, guide-wire, and biliary stent were frequently reported. However, the case of esophageal perforation developed during diagnostic ERC was very rare and there has not report in Korea yet. A 61-year-old man was admitted for the evaluation of upper abdominal pain. He suspected bile duct dilatation and common bile duct stone by ultrasonography. During the diagnostic ERC, endoscopy showed structure of pleural cavity. We suspected esophageal perforation, and then checked retropharyngeal air shadow. We diagnosed esophageal perforation accompanied with pneumothorax. He was successfully treated with medical treatment for 10 days.

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.

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.

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.

자동 크로마키 시스템을 위한 효과적 사용자 인터페이스 구현

최승인,황지순,하진영 강원대학교 정보통신연구소 2010 정보통신논문지 Vol.14 No.-

Chroma-key systems, which separate object from background image and compose new image with separated object over new background image, are widely used in remote education, presentation, and weather forecasting on TV. However chroma-key systems usually require studios with high-end cameras, perfect illumination, and blue screen. We cannot get high quality chroma-key video without such equipments. In this research, we implemented a low cost chroma-key system using PC with webcam, common illumination, and chief bluescreen. Any JPEG images can be used as background image in our system. After detecting monochrome background image, shadows are eliminated, then a target object is segmented from background images. Finally the extracted object is composed over user selected background images. We can set order and time of background images in a text file. Furthermore we can change background images forward and backward using image recognition without keyboard or mouse. Our system can be used as an education system, since human computer interaction is powered by scan color detection to get user hand position.

고성과작업시스템(HPWS)이 기업성과에 미치는 영향: 조직문화 강도의 매개효과를 중심으로

김현옥,하승인,이명주 조선대학교 지식경영연구원 2024 기업과 혁신연구 Vol.47 No.1

본 연구는 HPWS(고성과작업시스템, 이하 HPWS)과 기업성과간의 관계를 HRM 프로세스적 접근법을 기반으로 조직문화 강도의 매개효과를 살펴보고 있다. HPWS이 조직문화 강도에 미치는 영향을 HR권위의 정당성이 조절하는 것을 보여주고 있다. 마지막으로 기업성과를 주주와 종업원 관점을 적용하여 HPWS가 조직몰입과 재무성과에 미치는 영향을 모두 살펴보고 있다. 구조방정식 모형을 이용하여 HPWS와 기업성과의 관계에 대한 조직문화강도의 매개효과와 HR권위 정당성의 조절효과를 검증한 결과, HPWS는 조직문화 강도를 매개로 조직문화와 재무성과에 유의한 정적인 관계를 가지는 것으로 나타났고, HR권위의 정당성은 HPWS와 조직문화강도의 관계를 조절하는 것을 보여주었다. 즉, HR권위의 정당성이 높을 때 HPWS가 조직문화강도에 미치는 정적인 영향이 더 강화되는 것으로 나타났다. 이러한 연구결과는 잘 설계된 HPWS가 조직문화의 강도에 영향을 미치고, 이러한 조직문화 강도가 기업성과에 영향을 미치므로 조직에서는 HPWS의 제도 설계와 함께 제도의 실행 과정을 고려해야 한다는 시사점을 제공한다. 그리고 HPWS가 잘 실행되기 위해서는 HR권위의 정당성이 필요하며, 이를 높이기 위한 노력이 필요하다. HR부서가 경영자의 전략적 파트너이자 변화주체로서 역할을 한다는 것을 종업원들에게 지각시킬 필요가 있을 것이다. Based on the process approach to HRM, this study examines the mediating effect of organizational culture strength on the relationship between high performance work systems (HPWS) and firm performance. Second, we investigate whether the legitimacy of HR authority moderates the effect of HPWS on organizational culture strength. Finally, we evaluate the effect of HPWS on both organizational commitment and firm financial performance from the perspective of shareholders and stakeholders. A structural equation model is used to test the mediating effect of organizational culture strength and the moderating effect of HR authority legitimacy on the relationship between HPWS and firm performance. Findings indicate that HPWS is positively related to firm financial performance through organizational culture strength. HR authority legitimacy moderates the relationship between HPWS and organizational culture strength. In other words, the positive effect of HPWS on organizational culture strength is enhanced when HR authority legitimacy is high. These findings suggest that a well-designed HPWS affects organizational performance through the strength of organizational culture, so that organizations should consider not only the design of HPWS but also its implementation. In addition, the legitimacy of HR authority is necessary for HPWS to be well implemented, and efforts should be made to increase it. Employees need to be made aware of HR's role as a strategic partner and change agent for management.