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- 저자 : Wonjoon Kim (검색결과 133 건)
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The effects of funding policy change on the scientific performance of government research institutes
Kim Wonjoon,Kim Wonjoon 기술경영경제학회 2020 ASIAN JOURNAL OF TECHNOLOGY INNOVATION Vol.28 No.2
Despite growing government financial support for scientific development, our understanding of the effect of funding practices on scientific performance is limited. This study investigates the effects of funding policy change on the scientific performance measured by research output of government research institutes (GRIs) in South Korea. This paper analyzes the balanced panel data to examine performance at Korean GRIs during 90's. Our findings indicate that the introduction of a new funding policy improved the journal impact factors of papers.
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The effect of patent protection on firms’ market value: The case of the renewable energy sector
Kim, Daehyun,Kim, Namil,Kim, Wonjoon Elsevier 2018 RENEWABLE & SUSTAINABLE ENERGY REVIEWS Vol.82 No.3
<P><B>Abstract</B></P> <P>In the renewable energy industry, technology development requires a large initial investment by firms and takes a long time. Thus, protecting patents in this industry has become an increasingly important issue in maintaining a company's value. In this study, we examine how patent protection affects firms’ market value by analyzing the listed companies in South Korea in the renewable energy sector over a 35-year period (from 1980 to 2014). We find that simple patent counts are not a strong measure for explaining a firm's financial success in this industry, whereas indices that represent a firm's ability to protect patents (backward citation and patent family) positively and significantly affect the firm's market value. This study suggests that patent protection is an important factor for companies in improving their economic value in the renewable energy sector.</P>
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Development of in-Vehicle Auditory Display using Sound Quality Metrics
Wonjoon Kim,Donggun Park,Jiwon Shin,Jinwoo Oh,Nakyung You,Myung Hwan Yun 대한인간공학회 2016 대한인간공학회 학술대회논문집 Vol.2016 No.11
Objective: This study aims to categorize various sounds from auditory display based on contexts and to identify sound quality parameters and their appropriate levels, which affect subjective evaluation according to the contexts. Background: Although there are many in-vehicle sounds with different types, previous researches are mostly focused on warning signals. It is important to investigate different types of sounds and their relationship with sound quality parameters. Method: Nine types of sound were selected from auditory display of 6 domestic and imported premium sedans and categorized into two types of context: warning and alarm. Through expert reviews, six variables of sound quality parameters were selected with 3 levels each. Sample sounds were designed based on the combination of the variable levels using orthogonal array. Twenty nine subjects evaluated the sounds based on three evaluation metrics: urgency, suitability, and annoyance. ANOVA and conjoint analysis were performed. Results: The urgency and suitability in the context of warning are significantly different with the levels of parameters whereas the suitability only does in the context of alarm. The suitability can be improved with harmonic type and attack time for warning sounds and with attack time and period for alarm sounds. Conclusion: This study revealed important parameters and appropriate levels for the contexts of warning and alarm. Application: It is expected to help and enhance designs of auditory device according to various contexts of the in-vehicle sound.
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Kim, Si-Won,Kim, Hyoungchul,Yoon, Kyung Joong,Lee, Jong-Ho,Kim, Byung-Kook,Choi, Wonjoon,Lee, Jong-Heun,Hong, Jongsup Elsevier 2015 Journal of Power Sources Vol.280 No.-
<P><B>Abstract</B></P> <P>High temperature co-electrolysis of steam/CO<SUB>2</SUB> mixtures using solid oxide cells has been proposed as a promising technology to mitigate climate change and power fluctuation of renewable energy. To make it viable, it is essential to control the complex reacting environment in their fuel electrode. In this study, dominant reaction pathway and species transport taking place in the fuel electrode and their effect on the cell performance are elucidated. Results show that steam is a primary reactant in electrolysis, and CO<SUB>2</SUB> contributes to the electrochemical performance subsequently in addition to the effect of steam. CO<SUB>2</SUB> reduction is predominantly governed by thermochemical reactions, whose influence to the electrochemical performance is evident near limiting currents. Chemical kinetics and mass transport play a significant role in co-electrolysis, given that the reduction reactions and diffusion of steam/CO<SUB>2</SUB> mixtures are slow. The characteristic time scales determined by the kinetics, diffusion and materials dictate the cell performance and product compositions. The fuel electrode design should account for microstructure and catalysts for steam electrolysis and thermochemical CO<SUB>2</SUB> reduction in order to optimize syngas production and store electrical energy effectively and efficiently. Syngas yield and selectivity are discussed, showing that they are substantially influenced by operating conditions, fuel electrode materials and its microstructure.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Steam is the primary reactant in co-electrolysis of steam/CO<SUB>2</SUB> mixtures. </LI> <LI> CO<SUB>2</SUB> contributes to the electrochemical performance near limiting currents. </LI> <LI> CO<SUB>2</SUB> reduction is predominantly governed by thermochemical reactions. </LI> <LI> Chemical kinetics and mass transport play a significant role in co-electrolysis. </LI> <LI> Syngas yield and selectivity are largely dependent on operating conditions. </LI> </UL> </P>
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Development of Affective Visual Quality for Vehicle Trunk using Affective Engineering
Wonjoon Kim(김원준),Taebeum Ryu(류태범),Yushin Lee(이유신),Donggun Park(박동건),Myung Hwan Yun(윤명환) 대한산업공학회 2015 대한산업공학회 춘계학술대회논문집 Vol.2015 No.4
Objective: The purpose of this study is to identify affective variables for visual quality of vehicle trunks and to explore the relationship between the affective variables and design variables of the trunks. By determining which design variables affect satisfaction of the trunk based on the relationship, design guideline can be suggested to improve the affective quality and the satisfaction of the trunks. Background: As the importance of user satisfaction has been increasing in the product-use, affective engineering has become a key method to design a product for improving the user satisfaction. Method: Ten vehicles and thirty participants were recruited for the affective evaluation. The affective visual quality for the vehicle trunks was rated by the participants using 7-Likert scales and 100 point scales. According to the results, we developed the affective model of visual quality for vehicle trunk using regression analysis based on the relationship between the affective variables and conjoint analysis based on the relationship between the design variables and satisfaction. Results: As the result of the conjoint analysis, Pad Color turned out to be the design variables that have positive impact on improving satisfaction of vehicle trunk. Different types of vehicle showed that the different design variables were used to describe the satisfaction of the trunk. Conclusion: By statistical analysis for the impact on the satisfaction of the trunk, the relationship between the affective variables and design variables is determined. An evaluation model of the satisfaction vehicle trunk is suggested based on the relationship. Also, the combinations of design variables are expected to be applied on forecasting the affective visual quality of the vehicle trunk developed later. Application: On the basis of this study, the evaluation model of satisfaction can be further applied to other moving parts of vehicle such as hood and sunroof.
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Developing an Affective Visual Quality Metric for Vehicle Door Trim
Wonjoon Kim,Soochan Jee,Taebeum Ryu,Myung Hwan Yun 대한인간공학회 2013 대한인간공학회 학술대회논문집 Vol.2013 No.10
Objective: The aim of this study is to determine the affective impressive that occurs when the driver see the door trim of the vehicle analyzing the relationship the design elements and affective quality perception. By examining the various impressive changes between when observing the vehicle door trim, a researcher can materialize the affective feeling and suggest design variable of door trim that can improve the affect goal. Background: Affective engineering is a method devised to measure and analyzes a person’s affectivity in diverse ways—which appears when using products. Method: The experiment was conducted with 7 vehicles, 30 subjects were collected in the process, and questionnaire composed of 7 and 100 point scales was prepared to perform evaluation on affectivity for luxuriousness of vehicle doors. Through performing regression analysis, the result of evaluation was utilized to create a model that can presume the luxuriousness of door appearance. Results: As a result of the regression analysis, harmonious, sophisticated turned out to be the affective adjectives that have impact on improving the luxuriousness of vehicle doors. It was possible to recognize that depending on the type of vehicles, different adjectives were used to describe luxuriousness. Moreover, door handle shape, seat adjust button were confirmed to be the design variables that influence the luxuriousness. Conclusion: Through quantitative and qualitative analysis on luxuriousness of vehicle doors, we expect that a luxuriousness model of vehicle doors can be developed based on design variable and affective adjective of vehicle doors—to further aid the designing procedure of vehicle doors for improving luxuriousness. Application: With the results of this study, designer of vehicle door trim is able to know how to make the design variables of door trim for the desired level of luxuriousness. And we’ll be able to expect that customers’ perception of luxuriousness for vehicle door trim can be conceptualized more clearly.
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Development of Affective Visual Quality for Vehicle Trunk using Affective Engineering
Wonjoon Kim(김원준),Taebeum Ryu(류태범),Yushin Lee(이유신),Donggun Park(박동건),Myung Hwan Yun(윤명환) 한국경영과학회 2015 한국경영과학회 학술대회논문집 Vol.2015 No.4
Objective: The purpose of this study is to identify affective variables for visual quality of vehicle trunks and to explore the relationship between the affective variables and design variables of the trunks. By determining which design variables affect satisfaction of the trunk based on the relationship, design guideline can be suggested to improve the affective quality and the satisfaction of the trunks. Background: As the importance of user satisfaction has been increasing in the product-use, affective engineering has become a key method to design a product for improving the user satisfaction. Method: Ten vehicles and thirty participants were recruited for the affective evaluation. The affective visual quality for the vehicle trunks was rated by the participants using 7-Likert scales and 100 point scales. According to the results, we developed the affective model of visual quality for vehicle trunk using regression analysis based on the relationship between the affective variables and conjoint analysis based on the relationship between the design variables and satisfaction. Results: As the result of the conjoint analysis, Pad Color turned out to be the design variables that have positive impact on improving satisfaction of vehicle trunk. Different types of vehicle showed that the different design variables were used to describe the satisfaction of the trunk. Conclusion: By statistical analysis for the impact on the satisfaction of the trunk, the relationship between the affective variables and design variables is determined. An evaluation model of the satisfaction vehicle trunk is suggested based on the relationship. Also, the combinations of design variables are expected to be applied on forecasting the affective visual quality of the vehicle trunk developed later. Application: On the basis of this study, the evaluation model of satisfaction can be further applied to other moving parts of vehicle such as hood and sunroof.
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