• Archives of design research
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• v.13 no.3
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• pp.7-16
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• 2000

Aesthetics undertakes important roll in design as a competitive factor. The importance of aesthetics can be found in experimental aesthetics, Gestalt psychology and design related literatures. These literatures suggest that, besides the importance of aesthetics, many other aesthetic factors would affect consumer reaction(recognition, emotional reaction, meaning), but the study is still in insufficient condition. Hense, this study tries to give a guideline -'how to design symbols'based on the apprehension of what kind of design is well recognized(correct recognition), gives positive emotional reaction(affect) to customers, and moreover, what sort of aesthetic factors affect these reactions by analyzing existing symbol designs.

• Korean Journal of Environmental Agriculture
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• v.13 no.2
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• pp.191-198
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• 1994

2-Thiophenyltriisopropoxytitanium was prepared in situ by trans-metallization of 2-thiophenyllithium and chlorotitaniumtriisopropoxide. It could be isolated at room temperature and preserved at $-10{\circ}C$ for weeks. The reactivity of 2-thiophenyltriisopropoxytitanium to carbonyl compounds proved to be high. Complete aldehyde-selectivity was observed in competition reactions of 2-thiophenyl-triiso-propoxytitanium with a 1 : 1 mixture of aldehyde and ketone. In the competitive reaction of 2-thiophenyl-triisopropoxytitanium to ketone-ester function, ketone adduct was perfectly obtained.

• Journal of the Korean Chemical Society
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• v.26 no.6
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• pp.407-413
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• 1982

The rate constants of the nucleophilic addition of cysteine to 3,4-methylenedioxyphenylmethylene malononitrile were determined by UV Spectrophotometry and a rate equation which can be applied over wide pH range was obtained. On the basis of rate equation, it may be concluded that the rate constants were dependent upon only the concentration of hydroxide ion above pH 9.0, however, below pH 6.0, the reaction were initiated by the addition of neutral cysteine molecule to carbon-carbon double bond and at pH 7.0~9.0, the addition of a neutral cysteine molecule and it's anion occurred competitively.

• Journal of the Korean Chemical Society
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• v.44 no.5
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• pp.429-434
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• 2000

The rate constants for the hydrolysis of styryldiphossphine oxide(SDPO) were deter-mined by ultraviolet visible spectrophotometric method and rate equation which can be applied over wide pH ranges was obtained. On the basis of pH-rate profile, hydrolysis product analysis, general base catalysis and substituent effect, a plausible hydrolysis mechanism is proposed : Below pH 4.5, the hydrolysis reaction is pro-ceeded by the attack of water to carbocation after protonaticentration of hydroxide ion.

• Journal of Digital Convergence
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• v.19 no.1
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• pp.327-333
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• 2021

The purpose of this study is to explore what elements and measures are necessary to grasp the content influence and competitiveness of each OTT platform, which is difficult to measure only with the existing TV broadcast ratings indicator, on the same basis. In this study, based on the RACOI, the daily Top 10 list provided by Netflix was scored to determine the correlation with the viewers' reaction to TV dramas, and a meaningful comparison criterion index was derived. Based on this, the study tried to analyze the share of content provided by the top 3 OTT platforms in Korea. Spearman's correlation analysis was performed for each indicator of RACOI and the Netflix popularity score. It was confirmed that the Netflix popularity score was correlated with the digital video views indicator of RACOI. As a result of analyzing the platforms, it was found that the popularity of the content provided by Netflix and Tving was relatively high. This study did not secure the company's sales data, and there is a limitation in that long-term tracking analysis could not be performed. However, the study extracted the viewer response indicators of TV that are correlated with popularity within Netflix. It is valuable as a basic study of an extended study that compares and confirms the long-term impact of content provided by each OTT platform in the future.

• Proceedings of the Korean Society for Quality Management Conference
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• 2004.04a
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• pp.588-594
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• 2004

최근 통신서비스 시장 전반적인 성장정체와 경쟁 심화의 영향으로 주요 통신서비스 사업자들은 '고객만족'을 경영의 핵심요소로 설정하고, 다양한 노력을 하고 있다. 이는 신규가입 자 유치가 쉽지 않은 상태에서 고객만족도가 하락할 경우, 결과적으로 가입자 이탈로 이어져 단순한 기업 이미지 하락차원을 벗어나 사업자의 수익에도 직접적인 영향을 미치는 것을 반영하고 있다 이와 관련, 과거의 요금이나 마케팅 차원에서의 가입자 기반 강화 노력에서 탈피해서 서비스 품질에 대한 근본적인 개선과 가입자의 욕구를 미리 파악, 서비스를 제공함으로써 가입자 불만을 최소화하려는 움직임이 증가하고 있다. 특히, 2002년 9월 정보통신부 주도로 초고속인터넷 서비스를 중심으로 서비스수준협약(SLA: Service Level Agreement) 제도가 도입된 이후 아직까지는 제도, 정책, 환경 등의 측면에서 초보적인 수준을 벗어나지는 못 하고 있지만, 통신사업자 입장에서는 점차 증가하는 가입자의 불만에 대응책과 경쟁 사업자 대비 차별화 방안 모색의 필요성 증가로 인해 그 활용도가 증가하고 있다. 이에 본 논문에서는 통신서비스에 대한 SLA 제도 도입과 관련해서 SLA 제도에 대한 사용자의 반응을 파악, 향후 품질보장형 네트워크의 구축, 사용자의 고품질 서비스에 대한 요구 증대, 사용자 보호정책 강화 푸진 등에 따른 통신사업자 입장에서 참고할 만한 사항을 제시 하고자 한다.

• Journal of the Korean Chemical Society
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• v.22 no.3
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• pp.150-157
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• 1978

The rate constants for the hydrolysis of the derivatives of N-(p-nitrophenyl)-benzohydrazonyl azide (p-$CH_3,\;p-CH_3O,\;p-NO_2$, p-Cl, p-Br) have been determined by UV spectrophotometry in 50% dioxane-water at $25^{\cicr}C$ and a rate equation which can be applied over wide pH range was obtained. Below pH 5, the rate of hydrolysis of hydrazonyl azides is accelerated by electron-donating group ($\rho$ = -0.47), whereas at the pH values greater than 7, the $\rho$-value is 0.68. The effect of salt, solvent, substituent and azide ion on the rate of hydrolysis are rationalized in terms of $S_N1$ and $S_N2$ mechanism; below pH 5, the hydrolysis proceed through $S_N1$, however, above pH 7, the hydrolysis is started by the attack of hydroxide ion and in the range of pH 5∼7, these two reactions occur competitively.

• Applied Chemistry for Engineering
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• v.20 no.2
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• pp.186-190
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• 2009

This study is purposed to analyze thermodynamic properties on the hydrogen production by dimethyl ether steam reforming. Various reaction conditions of temperatures (300~1500 K), feed compositions (steam/carbon = 1~7), and pressures (1, 5, 10 atm) were applied to investigate the effects of the reaction conditions on the thermodynamic properties of dimethyl ether steam reforming. An endothermic steam reforming competed with an exothermic water gas shift reaction and an exothermic methanation within the applied reaction condition. Hydrogen production was initiated at the temperature of 400 K and the production rate was promoted at temperatures exceeding 550 K. An increase of steam to carbon ratio (S/C) in feed mixture over 1.5 resulted in the increase of the water gas shift reaction, which lowered the formation of carbon monoxide. The maximum hydrogen yield with minimizing loss of thermodynamic conversion efficiency was achieved at the reaction conditions of a temperature of 900 K and a steam to carbon ratio of 3.0.

• Science of Emotion and Sensibility
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• v.21 no.3
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• pp.73-82
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• 2018

Attempts have been made to recognize social emotion, including competition-cooperation, while designing interaction in work places. This study aimed to determine the cardiac response associated with classifying competition-cooperation of social emotion. Sixty students from Sangmyung University participated in the study and were asked to play a pattern game to experience the social emotion associated with competition and cooperation. Electrocardiograms were measured during the task and were analyzed to obtain time domain indicators, such as RRI, SDNN, and pNN50, and frequency domain indicators, such as VLF, LF, HF, VLF/HF, LF/HF, lnVLF, lnLF, lnHF, and lnVLF/lnHF. The significance of classifying social emotions was assessed using an independent t-test. The rule-base for the classification was determined using significant parameters of 30 participants and verified from data obtained from another 30 participants. As a result, 91.67% participants were correctly classified. This study proposes a new method of classifying social emotions of competition and cooperation and provides objective data for designing social interaction.

• Journal of the Korean Geosynthetics Society
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• v.11 no.1
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• pp.1-9
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• 2012

This paper describes the batch test results for application of CFW(Carbonized Foods Waste), which was produced by the process of recycling waste, in PRB system. It analyzed characteristics for individual adsorption and competitive adsorption of Cu and Zn in heavy metals. In individual adsorption, the Langmuir and Freundlich models are used to predict adsorption equilibrium. The adsorption equilibrium corresponded to the Langmuir's and the maximum adsorption amount of Cu was greater than Zn's. The removal of heavy metal is predicted that Zn was faster than Cu. The reaction rate of Zn based on Pseudo-first-order and Pseudo-second-order was faster than Cu's, and the result of competitive adsorption test confirmed that the adsorption amount of Zn is reduced under similar condition for competitive adsorption rate of Cu and Zn. When Zn solution is mixed in Cu, Cu is adsorbed 86% on CFW. However, the adsorption of Zn is 19% on the contrary condition. Therefore, the removal characteristics of separate heavy metal should be considered for efficient treatment of contaminated ground based on complex heavy metal.