• Journal of Technology Innovation
• /
• v.25 no.1
• /
• pp.1-34
• /
• 2017

It is almost impossible for firms to possess all of resources and capabilities needed to create technological innovations in modern competitive environment. This situation forces firms to conduct R&D collaboration. Therefore, this paper analyzes an effect of appropriability protecting knowledge exclusively on R&D collaboration and product innovation performance. In addition, we investigate how the governmental R&D support moderates and influences those relationships through empirical analysis. The results of moderated mediation show that the impact of appropriability on product innovation performance appears to be a common pattern in each conditional indirect effect of appropriability regardless of financial, direct, indirect R&D support of the government. The more governmental R&D supports increase over a certain level, the more conditional indirect effects of appropriability on product innovation performance increase through the vertical R&D collaboration. However, conditional indirect effects of appropriability through horizontal R&D collaboration are not significant in all levels of government R&D supports. If we utilize an analysis of moderated mediation by applying governmental R&D supports as a moderator, it is possible to analyze a significant strength of innovation policies and their performance. Therefore, this paper would make a contribution to an evolution of governmental R&D support and an effective formulation of innovation policy.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.14 no.5
• /
• pp.2415-2421
• /
• 2013

Widespread personal data utilization has led personal data protection to its importance at core, and serious data spill has increased constantly as a result. Though various types of protection systems for data spill have been suggested, all these met failures in detection of personal data when printed out or preventing fatal data exposure without any protections when data spill happens. I propose API-Hook method which detects and controls personal data within printouts, and prevents data leakage through masking on the printed-out data. Also, it is verified if security is guaranteed on the documents containing personal data when implementing. In order to obtain security, it is essential to put more weights on the balance with availability than confidentiality.

• Proceedings of the KIEE Conference
• /
• 2007.07a
• /
• pp.652-654
• /
• 2007

본 논문에서는 국가의 기간 에너지원인 전력망을 구성하는 구조물인 송전철탑의 설계하중에 가장 큰 요인으로 작용하는 기준풍속 산정을 위한 연구내용을 고찰하고자 한다. 현행의 송전용 지지물 설계 기준은 전기설비기술기준에 고시된 가공전선로 지지물에 관한 기준을 토대로 전력사의 실무적인 설계를 위하여 보다 구체화하여 작성된 한국전력공사 송전설계기준에 근거하고 있다. 이러한 기존 설계기준은 1985년 이전의 기상자료를 토대로 제정되어 본 논문에서는 1980년대 후반부터 약 20년간의 기상청의 풍향, 풍속자료를 추가로 확보하고 이를 분석하여 재현기간을 반영한 지역별 설계기준 풍속 Map을 제시하였다. 이러한 흐름으로 최근의 기상자료를 포함하여 보다 정확한 분석을 도모하고, 사회 환경의 급변함에 따라 우려되는 기상이변 등을 고려한 안전성과 경제성이 향상된 기준풍속 산정과정을 고찰하고, IEC 등 해외 주요국의 풍하중 설계기준에서 반영하고 있는 국부지형을 고려한 설계방법에 대한 국내 기준 적용성 평가를 위한 비교분석 결과를 소개하였다.

• Proceedings of the Korean Information Science Society Conference
• /
• 2007.10b
• /
• pp.50-54
• /
• 2007

소프트웨어 개발을 위한 모델링 방법 중 대표적인 것으로 UML을 이용한 방법이 있으며, 제품계열공학에서 소프트웨어의 재사용을 위한 모델링 방법으로 feature 모델링에 관한 연구가 진행 되고 있다. feature 모델링 방법은 잘 정의된 개발 기법을 제공하여 활용되고 있으나 다소 범용 적이지 않다. 또한 그 구조물이 UML과 상이하여 UML사용자가 feature 모델을 재사용하는 데는 어려움을 가지고 있고, feature 모델에서 class모델로의 변환을 제시한 기존연구는 도메인 전문가에 의해 경험적으로 모델링을 하기 때문에 모호성과 이해의 오류, 그리고 잘못된 해석 등의 문제가 발생 된다. 그리고, feature 모델과 class모델의 모든 요소를 매핑하여 변환하지 않는다는 점에서 완전하지 못하다. 따라서 본 논문에서는 Ontology를 이용하여 의미 기반의 명확한 명세를 통한 feature모델의 class 모델로의 변환기법을 제시하고, 이를 위해 feature 모델과 class 모델의 구조물의 요소를 정의하고 이를 기반으로 feature 모델과 OWL, 그리고 class 모델 속성간의 매핑 규칙을 제시하고, 본 논문에서 제시한 변환 프로세스를 이용하여 사례연구를 하였다.

• Transactions of the Korean Society of Mechanical Engineers B
• /
• v.39 no.4
• /
• pp.335-341
• /
• 2015

In this study, we analyzed a two-dimensional Stokes flow through a microchannel containing projections with constant spacing attached to each wall. The projections on the top and bottom walls were semi-circular in shape, with in-phase locations. By considering the periodicity and symmetry of the flow, the eigenfunction expansion and least squared error method were applied to determine the stream function and pressure distribution. For some typical radius and spacing values, the streamline patterns and pressure distributions in the flow field are shown, and the shear stress distributions on the boundary walls are plotted. In addition, the average pressure gradients in the microchannel are also calculated and shown with the radius and spacing of the projections. In particular, the results for the case of extremely small gaps between the projections on the top and bottom walls are in good agreement with the lubrication results.

• Journal of the Korea institute for structural maintenance and inspection
• /
• v.20 no.1
• /
• pp.118-125
• /
• 2016

This paper proposes the appropriate waterproofing methods for underground structures after applying different types of waterproofing materials on the concrete test specimens and selecting the best results out of humidity testing in winter conditions. Results of the testing showed that the underground structures absolutely require relevant waterproofing application based on the environmental conditions; when applied with interior waterproofing, the results showed that the concrete maintained high level of humidity and reinforcing steel within the concrete layer corroded. However, when applied with exterior waterproofing, it was shown that the waterproofing layer prevent direct contact with water and concrete, thereby protecting the concrete structure and improving overall durability. It follows that during underground structure construction, exterior waterproofing methods are have shown by an effective method for improving the durability as well as providing a comfortable interior environment for users.

• Land and Housing Review
• /
• v.2 no.4
• /
• pp.569-575
• /
• 2011

In domestic mechanical demolition work against RC building, unsuitable selection and loading of heavy equipment have led to occasional accidents such as collapse of structural members during the work. Therefore, proper analysis technique to easily decide allowable equipment load on the structure is needed at the planning stage of mechanical demolition work. In this paper, performing loading test and elastic analysis against 4-story building at full scale, we confirm appropriateness for allowable load of equipment on RC structures, which was suggested in previous study, and suggest structural analysis method that can evaluate safety of RC building during the mechanical demolition. The suggested method can be effectively utilized to improve work efficiency through safety of mechanical demolition work against RC building and proper management of equipments.

• The Journal of the Korea Contents Association
• /
• v.19 no.7
• /
• pp.291-303
• /
• 2019

For cities with ancient buildings at core areas, night lighting is an effective means to demonstrate their history and culture. In this regard, night scenes of these ancient buildings are evaluated from multiple aspects, such as color rendition, brightness ratio affected by ambient light and technological realization of lighting facilities. This study builds a visual evaluation system for night scenes of ancient buildings based on three dimensions, namely ancient architecture carrier performance, visual perception and technological realization, and explains specific evaluation sub-criteria one by one. In addition, this study adopts Analytic Hierarchy Process (AHP) to analyze the impact of each sub-criteria item on the weight of the whole evaluation system, and conducts a consistency test to show that the evaluation system meets the reasonable requirements of hierarchy setting. Moreover, relative importance of each sub-criteria item may be determined based on their corresponding weights.

• Journal of the Korean GEO-environmental Society
• /
• v.22 no.4
• /
• pp.5-13
• /
• 2021

The transition is the zone where support stiffness suddenly increases in the railway industry. If the support stiffness increases, differential settlement will occur at the transition due to difference of stiffness, and the differential settlement causes problems for the train running safety and the roadbed that supports the track. In particular, a study on differential settlement at bridge-earthwork transition was only conducted to considering railway load in most cases. However, these studies have not taken account of earthquake despite earthquake has been occurred frequently in the recent, and it is necessary to consider earthquake. Therefore, in this study numerical analysis has been performed by changing the inclination of approach block, which determines the shape of the transition, and earthwork in order to verify the effect of the shape of the transition on the dynamic behavior at the bridge-earthwork transition. The result shows that the dynamic behavior at the bridge-earthwork transition was affected by the shape of transition.

• Journal of the Korean Society of Radiology
• /
• v.17 no.2
• /
• pp.185-190
• /
• 2023

This study designed and produced stimuli in the form of canned images of fun humor, character, quirky, and sexy humor, and measured the signal values (SI) of the hippocampus associated with memory through fMRI analysis. The results of 20 participants showed that there were differences in SI values according to gender and age, and the fun humor image stimuli had the highest SI values. Men showed higher SI values for fun humor image stimuli, while women showed higher SI values for character humor image stimuli. In addition, those in their 20s showed higher SI values for fun humor image stimuli, while those in their 30s showed higher SI values for quirky humor image stimuli. Considering these findings, it is expected that more effective results can be obtained by utilizing fun humor images and characters in package design.