http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
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
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)
블록모델을 이용한 4절 기구의 함수생성 및 강체유도를 고려한 통합 기구합성
김범석(Bum Seok Kim),유홍희(Hong Hee Yoo) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
Several synthesis methods, graphical, analytical and computer-aided technique, have been proposed for selecting and scaling mechanical devices. The objective is to guide a rigid body through a specified position, or to force a point on a linkage to trace out the desired trajectory curve, or to perform a specific input/output relationship. This paper is based on the function generation and rigid body guidance, although the proposed method can be applied to any of them. Extensive research has been given to the synthesis of mechanisms for the purpose of function generation based on candidate mechanism layout. However, in the initial design stage, the designer has to synthesize a combination of linkage topology and type of joints which may be best suited for a particular task. This problem may be solved by means of experience, intuition of designers. So, the systematic determination of the optimal topology and dimension of mechanisms is very important in the mechanism design process. In this paper, unified mechanism synthesis which covered the problem of type and dimensional synthesis of planar mechanisms with respect to the functional requirement of output motion is proposed. To perform the unified synthesis for function generation, a planar linkage is modeled as a set of size-variable three rigid blocks connected by zero-length translational springs with variable stiffness. The values of spring stiffness and size of rigid blocks yielding a desired functional requirement related to input motion are found by using an optimization method.