• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2010년도 추계 학술발표회
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• pp.303-314
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• 2010

This study, as basic research which was intended to develope the surface reinforcement method using reinforcement material which is applicable to very soft ground in Korea, was aimed at proposing the design parameter for the surface ground improvement method. To that end, a wide width tensile test using geotextile, geogrid and steel bar (substitute for bamboo) and 49 kinds of the laboratory model tests were conducted. And the result the study suggested $\beta_s$, the stiffness coefficient to evaluate the stiffness effect of reinforcement materials. Then, it was also found that the stiffness coefficient, $\beta_s$ as the testing constant would be appropriate as high as 1.0, 1.1 and 1.5 for geotextile, geogrid and steel bar, respectively. And It was evaluated that the stiffness effect affecting reinforcement improvement effect would be reduced as the thickness of embeded depth increases and that RFe, the stiffness effect reduction coefficient would have positive correlation with H/B. Finally, it was confirmed that the bearing capacity gained from the method to calculate bearing capacity, which was suggested in the study, would almost correctly estimate the capacity, demonstrating the appropriateness of the proposed bearing capacity calculation method.

• 신재생에너지
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• 제7권2호
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• pp.18-27
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• 2011

Management flexibility to adapt its future actions in response to altered future market conditions can expand the value of an investment opportunity by improving its upside potential without the change in the downside losses. Module manufacturers in solar industry continuously have to decide how much and when its production capacity should be expanded with regards to the demand in the global markets. Either over- or under-investment can cause sunk and/or opportunity costs to the module manufacturers. Option of exercising the additional investments only on favorable opportunities can increase total value of the investment. This paper analyzes the case which shows that the expansion of production capacity with more expandibility can have more value than the rigid plan of capacity expansion. The expansion option value is equivalent to KRW 38.286 billion, thus switching the negative NPV of the initial investment opportunity into the positive value. High volatility and the high growth in the cashflows as the major business features of the renewable energy provide condition where real options can play the crucial role in increasing the investment value as well as in determining the size and timing of capacity expansion in the course of capital budgeting process.

• Clinical and Experimental Reproductive Medicine
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• 제25권1호
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• pp.1-8
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• 1998

항정자항체의 종류 및 존재부위가 정액성상 및 수정능력에 미치는 영향을 조사하였다. 항정자항체의 종류 및 존재부위는 immunobead binding test에 의하여 시행하였으며, 정자와 수정능력은 투명대제거 햄스터 난자 침입법에 의하여 시행하였다. 항정자항체는 정자수, 운동성 및 운동지수에 악영향을 끼쳤으며, 수정능력에도 악영향을 끼쳤다. 항정자항체의 존재부위에 따른 차이는 보이지 않았다. 항정자항체 IgG가 정자두부 혹은 정자미부에 존재할 경우 및 항정자항체 IgA가 정자미부에 존재할 경우 수정능력을 크게 감소시켰다.

• Journal of Information Technology Applications and Management
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• 제18권1호
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• pp.101-123
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• 2011

Considering how an organization is timely competitive for survival in the rapidly changing environment of today, it is more important to get new information and knowledge continuously by teams. However team system provides organization with opportunities and, at the same time, is provoked into conflict by the diversity of team members. This study examines the effect of team diversity on knowledge creation and investigates the influence of absorptive capacity and conflict as mediators. The sample population consisted of officials who work in teams at two business corporations that have successfully achieved knowledge creation. The result presents team diversity serves as an effective factor for absorptive capacity and absorptive capacity also serves as an effective factor for knowledge creation. In contrast, team diversity brings team members into conflict and conflict has a negative effect on knowledge creation. Another significant finding of this research is the fact that a positive effect of absorptive capacity on knowledge creation is greater than a negative effect of conflict on it. It clearly demonstrates that team diversity can be an important determinant of knowledge creation if an organization tries to reduce team member's conflict.

• 한국콘텐츠학회논문지
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• 제19권10호
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• pp.407-420
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• 2019

본 연구는 '기업의 환경요인을 통한 기술혁신이 Smart Factory 구축에 미치는 영향'에 대한 실증연구이다. 연구 목적은 Smart Factory를 구축할 때 내부환경이나 중점적으로 추진할 요인을 고려하고 구축하여 Smart Factory의 활용도와 효과를 높이는 것이다. 연구방법은 Smart Factory를 구축한 기업의 관련 인원들에게 설문을 조사하여 SMART PLS로 통계분석 하였다. 연구결과는, 기업 내부 조직 요인과 자기효능감은 기술혁신에 긍정적인 영향을 미치고, 기술혁신은 Smart Factory 구축의 핵심요인에 긍정적인 영향을 미쳤다. 그리고 조절변수인 흡수역량은 기술혁신요인과 상호작용으로 Smart Factory 구축의 핵심요인에 부분적으로 긍정적인 영향을 미쳤다. 본 연구는 Smart Factory를 구축하려는 기업이 활용할 수 있으며, 실증분석을 통한 Smart Factory 구축연구에 이론적 토대를 마련한 의의가 있다.

• Steel and Composite Structures
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• 제49권4호
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• pp.381-392
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• 2023

This study experimentally investigates the flexural behavior of steel-UHPC composite slabs composed of an innovative negative Poisson's ratio (NPR) steel plate and Ultra High Performance Concrete (UHPC) slab connected via demountable high-strength bolt shear connectors. Eight demountable composite slab specimens were fabricated and tested under traditional four-point bending method. The effects of loading histories (positive and negative bending moment), types of steel plate (NPR steel plate and Q355 steel plate) and spacings of high-strength bolts (150 mm, 200 mm and 250 mm) on the flexural behavior of demountable composite slab, including failure mode, load-deflection curve, interface relative slip, crack width and sectional strain distribution, were evaluated. The results revealed that under positive bending moment, the failure mode of composite slabs employing NPR steel plate was distinct from that with Q355 steel plate, which exhibited that part of high-strength bolts was cut off, part of pre-embedded padded extension nuts was pulled out, and UHPC collapsed due to instantaneous instability and etc. Besides, under the same spacing of high-strength bolts, NPR steel plate availably delayed and restrained the relative slip between steel plate and UHPC plate, thus significantly enhanced the cooperative deformation capacity, flexural stiffness and load capacity for composite slabs further. While under negative bending moment, NPR steel plate effectively improved the flexural capacity and deformation characteristics of composite slabs, but it has no obvious effect on the initial flexural stiffness of composite slabs. Meanwhile, the excellent crack-width control ability for UHPC endowed composite members with better durability. Furthermore, according to the sectional strain distribution analysis, due to the negative Poisson's ratio effect and high yield strength of NPR steel plate, the tensile strain between NPR steel plate and UHPC layer held strain compatibility during the whole loading process, and the magnitude of upward movement for sectional plastic neutral axis could be ignored with the increase of positive bending moment.

• 한국콘텐츠학회논문지
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• 제18권3호
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• pp.499-508
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• 2018

이 연구는 경찰공무원을 대상으로 우리나라에서 최초로 회복탄력성을 측정하고, 조직몰입에 미치는 영향을 검증하여 경찰조직을 대상으로 한 실증적 연구의 방향성을 제시하는데 목적이 있다. 회복탄력성에 대한 선행연구의 분석을 통해서 회복탄력성의 발전과정과 하위 개념들을 정리하고, 경찰공무원의 회복탄력성이 조직몰입과 어떤 관계가 있는지를 분석하고자 하였다. 따라서 회복탄력성의 하위 개념을 자기조절능력(감정조절력, 원인분석력, 충동통제력), 대인관계능력(자아확장력, 소통능력, 공감능력), 긍정성(감사하기, 생활만족, 낙관성)으로 나누어 독립변수로, 조직몰입(감정몰입, 지속몰입, 규범몰입)을 종속변수로 사용하여 분석모형을 설정하였다. 분석결과 회복탄력성이 조직몰입에 미치는 영향을 생활만족>원인분석력>소통능력>공감능력>감사하기>충동통제력 순으로 모두 감정몰입에 정(+)적인 영향을 미치고, 생활만족>낙관성>감정조절력>소통능력>원인분석력 순으로 지속몰입에 정(+)적인 영향을 미치며, 자아확장력>공감능력>낙관성>생활만족>충동통제력>원인분석력 순으로 모두 규범몰입에 정(+)적인 영향을 미치는 것으로 나타났다.

• 유통과학연구
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• 제13권1호
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• pp.7-18
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• 2015

Purpose - This study integrates a corporate competition system with a bird predation system to examine how organizational strategic adjustment capacity influences firm performance. By proving the prominent effects on performance, a financial vector is constructed to represent corporate strategic adjustment results, and an operation capacity vector is constructed, which can be categorized as a parameter for locating birds. All these works help us to propose a new method of investment, the portfolio decision model based on the strategic adjustment capacity. Research design, data, and methodology - Strategic adjustment capacity can be decomposed into three aspects: the organizational learning capacity from the top firms, the extent to which firms maintainor rely on the best operational capacity vector in history, and the ability to eliminate the disadvantages or retain the advantages of the operation capacity vector from the previous year. The method of solving cyclic equations is designed to evaluate strategic adjustment. Firms manufacturing specialized equipment are chosen to test the effects of the strategic adjustment capacity on three aspects of firm performance. Results - There is a positive correlation between the capacity to learn from the best firms and performance improvement. The relationship between the dependence or maintenance of a firm's advantages and performance improvement is a U-shape curve, and there is no significant effect of inertial control on performance improvement. Conclusions - A firm's competition system is a sophisticated adaptation, and competitive advantage and performance can be investigated based on the principles of competition in nature.

• 대한기계학회논문집A
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• 제26권8호
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• pp.1709-1718
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• 2002

It is well recognized that improving capacity of positive grid in battery is one of key factors for controlling the expected long lift-time of Battery Energy Storage System(B.E.S.S). Thus it is really important to characterized material properties of positive grid which are mainly affected by fabrication process. In this study, two kinds of positive grids, which were fabricated by gravity casting and die-casting technique were used. Micro-structural observation and tensile test were conducted to investigate the effect of fabrication process of positive grid. Ultrasonic measurement based on pulse-echo method and ultrasonic C-scan technique also performed to correlate ultrasonic velocity with porosity ratio in positive grid. It was found that the porosity ratio of grid fabricated by gravity casting technique increased significantly compared to the grid fabricated by die-casting technique. It was also shown that ulrasonic technique is effective to evaluate the porosity ratio in positive grid.

• 경영과정보연구
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• 제36권5호
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• pp.175-193
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• 2017

본 연구는 BtoB 기업 간 거래에서 형성된 사회적 자본(social capital)이 기업성과에 미치는 영향을 지식흡수역량의 매개적 조절효과를 중심으로 연구모형을 검증하였다. 즉, 사회적 자본의 각각의 차원이 기업성과에 어떠한 영향을 미치는지를 검증하였다. 기존선행연구에서 제시하지 않은 사회적 자본의 각 차원간의 관계를 검증함으로써 사회적 자본 중 어떠한 요소가 기업성과에 영향을 미치는지를 확인하였다. 또한 지식흡수능력에 따라 기업성과에 미치는 영향에 대해 다양한 방법으로 분석하여 제시하였다. 연구결과를 요약하면 다음과 같다. 첫 번째, 사회적 자본을 3가지 차원으로 구분하였다. 즉, 구조적 차원, 관계적 차원 그리고 인지적 차원으로 구분하여 각 구성요소간의 관계를 검증하였다. 먼저 구조적 차원이 관계적 차원에 영향을 미쳤으며, 관계적 차원이 인지적 차원에 긍정적인 영향을 미치는 것으로 나타났으며 마지막으로 구조적 차원 또한 인지적 차원에 영향을 미치는 것으로 나타났다. 이는 선행연구에서 한계점으로 지적되었던 것을 검증했다는 것에 의미가 있다. 두 번째, 사회적 자본의 각각의 구성요소들이 지식흡수역량에 긍정적인 영향을 미치는 것으로 나타났다. 마지막으로 지식흡수역량이 기업성과에 긍정적인 영향을 미치는 것으로 나타났으며 지식흡수역량의 중요성을 확인한 결과 사회적 자본과 기업성과 사이에서의 매개된 조절 효과도 있음을 확인하였다. BtoB 거래에서 축적된 사회적 자본을 어느 정도 흡수하는가에 따라 두 기업의 성과는 분명 다를 수 있음을 의미한다.