• Journal of Digital Convergence
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• v.11 no.4
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• pp.443-448
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• 2013

The purpose of this study is to enhance the competitiveness of the city through utilize of cultural content in region. To achieve the purpose, the study empirically analyzed the regional comic governance. The analysis is assessed through survey measurements of the level of cognition of citizens (n=493) in Bucheon city. According to the conceptual framework, the study measures value of comics, comic city policy, cartoonists activity, and utilize effect of the comic & support. Also, we analyzed the significant differences of cognition by respondent characteristics. Lastly, this study used structural equation modeling (SEM) to test the relationships between value of comics and utilize effect of the comic & support.

• 한국벤처창업학회:학술대회논문집
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• 2018.04a
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• pp.123-125
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• 2018

본 연구는 우리나라 대학의 창업교육센터(Entrepreneurship Education Center)에 대한 조사를 수행하여 선행 조사DB와 비교 분석하였다. 창업교육센터 실태조사를 바탕으로 대학별 정량적 정성적 지표를 측정하여 상위그룹과 하위그룹의 구분하고 두 집단의 차이점과 성공운영 요인을 분석하였다. 창업교육센터의 일반 현황과 특성, 교직원(교수자수, 교원창업자수), 교과목(과목, 수강인 원수), 학내외 프로그램(창업동아리, 창업경진대회, 창업캠프), 재정운영(예산, 전담인력) 등의 계량 지표는 대학정보공시(대학 알리미)와 중앙일보 대학평가 DB를 기초하여 조사하였다. 그리고 운영상의 문제점, 센터의 성과측정 항목 등 정성지표는 창업교육센터장을 대상으로 설문 조사하였다. 또한, 국내 창업교육센터의 표본특성을 살펴본 후 상위그룹과 하위그룹의 차이를 규명하여 상위그룹이 보유하고 있는 인적 물적 역량과 프로그램의 분석하여 창업교육센터의 활성화 방안을 제시하였다. 본 연구는 교육부의 "산학협력 선도대학(LINC) 육성사업 (2012년~2106년)"에서 창업교육을 총괄 지원하기 위해 2012년 대학에 설치된 전담조직인 61개 창업교육센터의 성과를 분석하고 대학평가에서 상위 순위에 있는 대학 그룹들의 차이점을 도출하는데 의미가 있다. 또한 2017년에 새롭게 지정된 LINC+ 사업 ('17년~) 창업교육 분야의 정책적 시사점을 제시한다. 본 연구의 목적을 달성하기 위해 문헌연구와 창업교육센터 운영에 대한 구조적 설문지를 개발하여 실태를 분석하였다. 이 결과는 창업교육센터의 효율적 운영을 위해 대학교직원 연구자 공무원 학생 및 창업교육센터를 포함한 창업지원 기관의 이해 관계자에게 향후의 발전을 위한 자료로써 의미가 있을 것이다.

• Proceeding of EDISON Challenge
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• 2017.03a
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• pp.643-649
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• 2017

심장 이온통로의 변화는 활동전압의 모양과 길이에 영향을 주어 심부정맥을 유발한다. 산화적 스트레스의 증가로 인해 생체에 침착이 증가하는 지질산화물 (4-HNE, 4-ONE)는 여러 단백질 및 이온통로에 영향을 주는 독성이차전달자로 알려져 있다. 본 연구자는 선행 연구를 통해 4-HNE와 4-ONE의 단기간 노출이 심실근세포에 발현되는 3종류의 이온통로 ($I_{Kr}$, $I_{Ks}$, $I_{Ca,L}$)의 전류감소와 kinetics변화를 일으키고, 심실근세포의 활동전압길이가 증가하는 것을 확인하였다. 두 물질이 이온통로들에 준 영향은 유사하였으나, 활동전압길이의 증가 정도가 4-ONE에서 더 크게 나타났다. 활동전압의 연장에 차이가 나는 원인과, 두 지질산화물이 또 다른 이온통로에 미치는 영향 유무를 예측하기 위해서 Grandi and Bers human ventricular model[1]을 적용한 Integrated human ventricular myocyte model 프로그램 (developed by prof. Youm)을 활용하였다. 시뮬레이션으로 재현한 4-HNE와 4-ONE에 의한 활동전압은 실험으로 기록된 것보다 연장 정도가 작았다. 시뮬레이션 모델의 background $Na^+$ 전류의 크기를 크게 하였을 경우, 실험에서 기록된 활동전압 길이에 상응하는 연장을 가져왔다. 그러므로, 4-HNE와 4-ONE는 실험으로 확인한 $I_{Kr}$, $I_{Ks}$, $I_{Ca,L}$ 이외에 심장세포에 존재하는 내향전류 (Late $Na^+$ current)의 크기를 증가하는 효과가 있음을 예측할 수 있으며, 실험적 검증이 요구된다.

• Journal of the Korean Chemical Society
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• v.36 no.2
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• pp.180-184
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• 1992

Kinetic studies for the reaction of pyridine with substituted benzoyl chlorides were conducted under various pressures (1-1000 bar) in acetonitrile. From rate constants, the activation parameters (${\Delta}V^{\neq}$, ${\Delta}{\beta}^{\neq}$,${\Delta}H^{\neq}$, ${\Delta}S^{\neq}$ and ${\Delta}G^{\neq}$) were evaluated. Rates of these reaction increased with an increase in the pressure. The activation volume, the activation compressibility coefficient and the activation entropy were negative. From substituents effect and these results, it was found that these reactions proceed through $S_N2$ mechanism, but the structure of transition state was slightly changed with substituents and pressure.

• The KIPS Transactions:PartC
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• v.9C no.6
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• pp.799-808
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• 2002

According to the wide-spread of information transmission system over network, the use of cryptographic system to provide the integrity of transmitted message over network is increasing and the importance of that is emphasized. Because the security of the cryptographic system totally relies on the key, key management is a essential part of cryptographic system. A number of key agreement protocols have been proposed to far, but their rigorous security analysis is still open. In this paper, we analyze the features of Diffie-Hellman based standard key agreement protocols and provide the security analysis of those protocols against several kinds of active attacks.

• Journal of The Korean Association of Information Education
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• v.20 no.6
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• pp.655-672
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• 2016

The purpose of this study was to investigate the effects of prior-knowledge level and supportive information types in web-based learning using 4C/ID model(Four-Components Instructional Design model) on cognitive load and schema acquisition. To achieve the purpose, this study applied a web based learning. 166 university students participated in web-based learning for 4 weeks. After web-based learning, they checked self report for cognitive load and made concept map for schema acquisition and the datum from them were used for 2 ways ANOVA. According to the findings, groups in prior-knowledge level invested significantly differences on cognitive load and a question group in case of supportive information types didn't invested significant differences on cognitive load with statement group. Second, groups in prior-knowledge level invested significantly differences on schema acquisition and a question group in case of supportive information types invested significantly higher schema acquisition than a statement group. Furthermore, it happened interaction effect between supportive information types and prior-knowledge level on schema acquisition. This research has several implications with regard to suggesting the guidelines and conditions for the authentic task of the novice.

• Journal of Venture Innovation
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• v.6 no.2
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• pp.101-121
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• 2023

The purpose of this study was to investigate the impact of issue leadership by sales managers on sales team performance, while examining the mediating role of team adaptive sales behavior and the moderating effect of team-member exchange (TMX). Data was collected from 125 sales teams, and both independent and dependent variables were measured with a time difference of two months using responses from sales managers and team members. The empirical analysis revealed several important findings. Firstly, the study found that issue leadership had a significant positive effect on sales team performance. Secondly, team adaptive sales behavior was found to partially mediate the relationship between issue leadership and sales team performance. Lastly, the study revealed that TMX moderated the relationship between issue leadership and sales team performance. These findings have significant academic and practical implications. Firstly, the study demonstrates the effectiveness of issue leadership as a sales leadership style in the B2C industry. Secondly, it highlights the importance of team adaptive sales behavior as a mechanism that mediates the relationship between issue leadership and sales team performance. Lastly, it underscores the significance of TMX as a situational factor that moderates the relationship between issue leadership and sales team performance. In practice, the results suggest that organizations should focus on developing issue leaders, fostering creative sales behavior at the team level, and activating social exchange within sales teams to enhance sales team performance.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.34 no.12
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• pp.1793-1803
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• 2010

The weighting method and goal programming require weighting factors or target values to obtain a Pareto optimal solution. However, it is difficult to define these parameters, and a Pareto solution is not guaranteed when the choice of the parameters is incorrect. Recently, the Mahalanobis Taguchi System (MTS) has been introduced to minimize the Mahalanobis distance (MD). However, the MTS method cannot obtain a Pareto optimal solution. We propose a function called the skewed Mahalanobis distance (SMD) to obtain a Pareto optimal solution while retaining the advantages of the MD. The SMD is a new distance scale that multiplies the skewed value of a design point by the MD. The weighting factors are automatically reflected when the SMD is calculated. The SMD always gives a unique Pareto optimal solution. To verify the efficiency of the SMD, we present two numerical examples and show that the SMD can obtain a unique Pareto optimal solution without any additional information.

• 지역과문화
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• v.6 no.1
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• pp.81-99
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• 2019

Despite the recent social interest, academic discussions about life culture festival in Korea are still not actively discussed. Therefore, on this study we intends to conduct an empirical analysis on the satisfaction, loyalty, and effects of life culture festival by using structural equation model. Before the analysis, we reviewed conceptual definitions about life culture and its previous studies for set up detailed factors to be used for. This study is based on the survey which distributed in 2016 Bucheon City life culture festival "DaRak". With collected survey, we analyzed data by using structural equation model. As a results, festival loyalty shows significant impact on festival effects(0.92). Both program factor(0.59) and operation-information factor(0.29) also shows significant result about festival effects as lower factor of festival satisfaction, but its only when they mediated by festival loyalty factor.

• Polymer(Korea)
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• v.33 no.1
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• pp.39-44
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• 2009

Polymer substrates were fabricated by using poly (phenylene ether) as a base resin, N,N'-m-phenylenedimaleimide (PDMI) as a crosslinking agent and decabromodiphenylethane as a flame retardant. The effects of crosslinking agent and flame retardant on physical properties such as dielectric property of the substrate were investigated. Thermal curing feature of PDMI with or without an initiator was analyzed by DSC, and then, PPE-PDMI test compositions were designed based on this result. Composite sheets were cast by film coater, laminated under vacuum and pressure, and then, the changes of dielectric constant, dielectric loss, peel strength, solder heat resistance and inflammability according to increasing amount of PDMI and flame retardant were evaluated, Dielectric constant and dielectric loss showed increasing trend with increasing amount of PDMI and flame retardant, but solder heat resistance and inflammability were improved. Peel strength was obtained higher than 1 kN/m when PDMI above 10 wt% was added, but slightly decreased as the amount of flame retardant increased. From the measured gel contents, the reaction mechanism of PPE-PDMI system was deduced to the formation of network structure by crosslinking PDMI with PPE rather than the formation of semi-IPN structure. In conclusion, the polymer composite substrate materials with dielectric constant of 2.52$\sim$2.65 and dielectric loss below 0.002 at 1 GHz were obtained and they will be proper for high frequency applications.