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김범석(Kim, Bum-Seok),김진한(Kim, Jinhan) 한국서비스경영학회 2020 서비스경영학회지 Vol.21 No.3
This study empirically analyzes how some features of customer-to-customer network influence the traditional relationship of customer satisfaction-loyalty. Specifically, we conduct mediating effect analysis, considering the features of customer network such as network size, strength and openness as mediating variable. The results show that network scale and openness do not mediate between customer satisfaction and loyalty, but network strength partially mediates the relationship. The results seem to imply that it is more effective for customer loyalty to share knowledge based on close interaction among customers, rather than gain access to broad information and new opportunities. This study provides meaningful insights for the role of customer network features on customer behavior and attitude and further takes on importance of extending the scope of customer participation into customer-to-customer network.
도로의 속도표지판 인식을 위한 YOLOv3 학습 데이터 수집 방법에 관한 연구
김범석(Bum-seok Kim),김종영(Jong-young Kim) 한국통신학회 2019 한국통신학회 학술대회논문집 Vol.2019 No.11
본 논문은 영상 객체 인식 모델인 YOLOv3를 이용한 도로 속도 표지판 인식 수행 시 인식률을 높이기 위한 학습 데이터 수집 방법을 제시한다. 실제 속도 표지판 인식용 학습 데이터 수집 시 인공 속도 표지판의 이용 가능 여부를 확인하고, 다양한 배경 패턴에서의 학습 데이터가 속도 표지판 인식에 영향을 미치는 요소를 파악하여, 인공 속도 표지판을 이용한 학습데이터 수집의 효용성을 확인한다.
김범석 ( Bum Suk Kim ),구민석 ( Min Seok Koo ),임필재 ( Pil Jae Lim ),김상호 ( Sang Ho Kim ),이명애 ( Myung Ae Lee ),곽호성 ( Ho Sung Kwak ) 대한마취과학회 2006 Korean Journal of Anesthesiology Vol.51 No.4
The temporomandibular joint can be dislocated during anesthesia as a result of excessive oral opening and direct laryngoscope handling. Occasionally, yawning can be observed during the induction of anesthesia with propofol. The forceful and voluntary yawning after a propofol injection can lead to a dislocation of the temporomandibular joint. We report a case of an anterior dislocation of the temporomandibular joint upon induction with propofol, which caused difficulties in mask ventilation and endotracheal intubation. Although intubation had been carried out successfully in this case, an unanticipated difficult airway can be confronted at anytime. Therefore, anesthesiologists should be aware of the management of a difficult airway and practice various methods according to a difficult airway algorithm. (Korean J Anesthesiol 2006; 51: 483~5)
철강 공급 네트워크에서 구조적 공백과 네트워크 폐쇄의 기업 운영성과에 대한 영향
김범석(Bum Seok Kim),김진한(Jin-Han Kim) 한국경영과학회 2020 經營 科學 Vol.37 No.4
In this study, we extends the debate surrounding contrasting views on network closure and structural hole, one of the main issues of social network theory, to supply chain network. In particular, we empirically unveil the relationship between operational performances of individual firms and two views based on structural positions(closure and hole) of the firms through the lens of supply chain network. To do so, based on physical flow data of a representative steel company of Korea, network density and constraints indices derived from social network analysis are used as proxy for network closure and structural hole respectively. Moreover, super efficiency as measured by data envelopment analysis with multiple inputs and outputs is adopted to represent each firm’s overall operational performance. Finally, main and interaction effects are tested by using generalized linear model, considering basic data characteristics and distributions. The results show that network closure has a negative effect and structural hole has a positive effect on operational performance. And also there is an interaction effect between two structural position indices.
원청-하청 기업 간 거래 건전성 평가를 위한 동반성장지수의 개발
김범석(Bum Seok Kim),강맹수(Maeng Soo Kang),민재형(Jae Hyung Min) 한국경영학회 2013 Korea Business Review Vol.17 No.1
본 연구에서는 현재 정성적으로 평가가 이루어지고 있는 동반성장지수를 보완할 수 있는 계량적 동반성장지수를 개발하였다. 동반성장위원회의 동반성장 추진대책의 주요 이슈인 납품단가문제, 하도급계약, 기술탈취 등을 평가할 수 있는 적절한 회계비율을 선정하고, 각 문제를 진단하는 지수를 산출한 후, 이들을 통합하여 최종지수를 제안하였다. 그리고 이를 실증하기 위하여, 규모별로 세분화된 기업의 표본을 재표본방법(Bootstrapping)을 통해 선정하고 이에 대한 전반적인 분포를 확인하였다. 또한 산출된 동반성장지수가 거래 건전성을 평가하는 지표임을 확인하기 위해 지수에 따른 하청기업의 채무불이행 행태를 통계적으로 검증하였다. 실험결과, 납품단가, 거래조건, 상생협력 중에서는 거래조건에서, 업종 측면에서는 건설업에서 불공정한 거래가 많이 이루어짐을 확인할 수 있었다. 또한 1차-2차 협력사 간의 지수는 대기업-1차 협력사 간의 지수에 비해 개선되어야 할 기업의 비율이 높게 나타나, 1차-2차 협력사 간의 동반성장지수의 산출 역시 필요함을 시사하였다. 또 제안한 동반성장지수에 따른 채무불이행 여부가 통계적으로 단조 증가한다는 사실을 통해 계량적 동반성장지수는 기업의 거래 건전성을 나타내는 지표로 활용 가능하며, 동시에 신속하고 객관적으로 산출가능하기 때문에 설문조사로 이루어지는 현행 동반성장지수의 한계점을 보완할 수 있는 대안지표로서의 가능성도 확인할 수 있었다. The major portion of South Korea`s economy can be characterized by MNC(Multi-National Corporation)-oriented export policy. Most SMEs(Small and Medium Enterprises) have been constantly striving to survive as subcontractors for large enterprises, which causes SMEs to be highly dependent on large ones. As a result, unfair business transaction has intensified polarization between large enterprises and SMEs. Such unfair business deals become common, and result in cost reduction and higher profits for large enterprises. On the contrary, SMEs are exposed to various financial risks including insolvency and default. However, numerous previous literature emphasize that if large enterprises and SMEs are mutually cooperated as SCM(Supply Chain Management) partners for win-win growth, the synergy effect would be immense. As SCM and win-win growth are getting more important these days, many enterprises put their focus on taking good care of their subcontractors. Realizing the seriousness of polarization between large enterprises and SMEs, the Korea government has implemented various policies in order to solve the problem and to encourage win-win growth for a sustainable business environment. Particularly, the Commission on Shared Growth for Large and Small Companies was established and developed a win-win growth index to filter unfair transactions between large and small companies, where the main evaluation entries were designed to diagnose unfair unit price problem, delay in payment and technical extortions. To develop the win-win growth index, they mainly surveyed SMEs` subjective view regarding the above problems. Especially, they focused on cooperation attitude of large enterprises. After the index was published by FKILSC(The Federation of Korean Industries Center for Large and Small Business Cooperation), they conducted a survey to measure the satisfaction level of the index; however, the survey score did not meet their expectation. The major negative issues raised regarding the survey were that it was lack of objectivity, and it did not measure the soundness of the transactions between the first vendors and the second ones among others. In this study, we suggest a quantitative win-win growth index to overcome the limitation of the current index developed mainly by a survey method. The first step to develop the index is to select three financial ratios concerning major conflicts disrupting fair business transactions between large enterprises and SMEs, which are rate of cost of goods sold, payable turnover period and debt ratio. Next, we calculate the values of these three respective indices to diagnose the problems by comparing the change rates of the above respective financial ratios of contractors and subcontractors. If the value of index is higher than 1.00, for example, it means that the contractor side is engaged in a unfair business transaction. Finally, we develop a quantitative win-win growth index by integrating these three indices. In this study, 32,405 firms` financial data and default data for the period of 3 years from 2007 to 2009 were used as a sample for the experiment. The data was segmented by industry and total asset size. We employ bootstrapping, a resampling method, to check overall distribution of the index. After creating the index, we subdivide its value on a scale of 4 grades; Superior (value below 1.00), Good (value between 1.00 and 1.50), Fair (value between 1.50 and 2.00), Poor (value over 2.00). In addition, in order to show the practical usefulness of the index such that it can precisely evaluate transaction soundness, we compare the index with SMEs` default ratios. The result of the experiment first shows that about 80% of the index values are under 1.50, which means most companies maintain a positive relationship between contractor and subcontractor. However, there still exist many unfair transactions such as delayed payment especially in construction industry. Secondly, the experiment shows that the ind