• Title, Summary, Keyword: TPB

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Luminescent and electrical properties of MEH-PPV and 1,1,4,4-Tetraphenyl-1,3-butadiene Double Layer films (MEH-PPV와 TPB 다층박막의 광발광 및 전기적 특성)

  • 이명호;김영관;신동명;최종선;김정수
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.163-166
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    • 1997
  • Electroluminescent(EL) dcvice based on organic thin layers have attracted lots of interests because of thier possible application as large-area light-emitting displays. It was known that MEH-PPV and 1, 1, 4, 4, -Tetraphenyl-1, 3-butadiene(TPB) has red and blue emission peak at 580nm and 480nm, respectively. In this study, MEH-PPV films and TPB films were prepared by spin coating and vacuum deposition method, respectively. Films of MEH-PPV and TPB double layer were also prepared by the same method. Photoluminescent(PL) characteristics of these single and doubler layers were investigated, where a cell structure of glass substrate/ITO/MEH-PPV and/or TPB/Al was employed. It was found that the photoluminescent efficiency of TPB film was higher than that of MEH-PPV film with a single layer and also with a double structure. These films have also different I-V characteristics.

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An Empirical Study of the Piracy Behavior on Digital Content (디지털콘텐츠 불법복제 행동에 관한 연구)

  • Zhang, Xiang-Lan;Shim, Min-Woo;Gim, Gwang-Yong
    • Journal of Information Technology Services
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    • v.9 no.4
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    • pp.37-55
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    • 2010
  • Digital content piracy has been shown to be an emerging societal problem, However, Studies on digital content piracy are very limited. In this paper, we try to find whether Theory of Planned Behavior(TPB) can explain the online digital content piracy in China. In addition to the finding of TPB's usefulness, We also examine the cross-cultural differences between Korea and China in behavior towards online digital content piracy. we argue that cultural factors moderate the strength of the relationships in the TPB model in online digital content piracy. we use a theoretical model of behavior based on the framework of the TPB( Theory of Planned Behavior) and Hofstede's national cultural dimensions. Our results indicate that the general TPB(Theory of Planned Behavior) model of software piracy is broadly applicable to digital content piracy in China. Our findings also show that most of the hypothesized moderating effects of national cultural factors were found to be significant.

The effects of Personality Trait and Social Cognitive Factors on Knowledge Sharing Behavior of the Hospital Nurses (성격적 특성과 사회인지적 요인이 병원 근무 간호사의 지식공유행동에 미치는 영향)

  • Youn, Kyung-Il;Lee, Won-Jae
    • Korea Journal of Hospital Management
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    • v.11 no.4
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    • pp.37-62
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    • 2006
  • This study investigates the antecedents of knowledge sharing behavior focusing on the individual level factors in an assumption that the behavior is initiated from the individual level decisions. A hypothesis that the relation between personality trait and behavior is mediated by the social-cognitive constructs contained in the Theory of Planned Behavior(TPB) is tested. For the study, we suggest a TPB extended model that extends original TPB model by including conscientiousness facet of FFM(Five Factor Model). This study uses a cross-sectional design. Data were collected from a self-reported survey on 197 nurses in a tertiary hospital. The results showes a significant positive relationship between the conscientiousness facet of FFM and knowledge sharing behavior. In the TPB extended model, the conscientiousness facet has significant direct effects on all the constructs of original TPB model. Of the TPB exogenous constructs, the social norm construct alone has a significant effect on intention and the perceived behavioral has a direct significant effect on the knowledge sharing behavior. These results confirm the importance of conscientiousness in predicting knowledge sharing behavior and clarify the characteristics of knowledge sharing behavior as a contextual, job oriented behavior in a workplace. We conclude that personality trait as conceptualized in the FFM needs to be integrated into TPB model in explaining the knowledge sharing behavior. Based on these results theoretical and practical implications are discussed.

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Structural Characterization of the Eight-Coordinated Dodecahedral Y(tpb)3(H2O)2 (8배위 12면체 Y(tpb)3(H2O)2착물의 합성과 구조)

  • Yu, Chong-Nam;Kang, Seong-Joo
    • Journal of the Korean Chemical Society
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    • v.51 no.3
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    • pp.240-243
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    • 2007
  • The eight coordinated yttrium(III) complex Y(tpb)3(H2O)2 (Htpb=4,4,4-Trifluoro-1-phenyl-1,3-butanedione) has been synthesized and structurally characterized by X-ray diffraction method. The coordination polyhedron of Y(tpb)3(H2O)2 has a dodecahedron. The angle between two trapezia, Y-O2-O1-O5-O6 and Y-O4-O3-O8-O7, is 89.59°. The O1-O5 and O3-O8 distances are 2.965 and 2.995 A whereas the O2-O6 and O4-O7 distances are 4.256 and 4.403 A.

Precipitation behaviors of Cs and Re(/Tc) by NaTPB and TPPCl from a simulated fission products-$(Na_2CO_3-NaHCO_3)-H_2O_2$ solution (모의 FP-$(Na_2CO_3-NaHCO_3)-H_2O_2$ 용액으로부터 NaTPB 및 TPPCl에 의한 Cs 및 Re(/Tc)의 침전 거동)

  • Lee, Eil-Hee;Lim, Jae-Gwan;Chung, Dong-Yong;Yang, Han-Beum;Kim, Kwang-Wook
    • Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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    • v.8 no.2
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    • pp.115-122
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    • 2010
  • In this study, the removal of Cs and Tc from a simulated fission products (FP) solution which were co-dissolved with U during the oxidative-dissolution of spent fuel in a mixed carbonate solution of $(Na_2CO_3-NaHCO_3)-H_2O_2$ was investigated by using a selective precipitation method. As Cs and Tc might cause an unstable behavior due to the high decay heat emission of Cs as well as the fast migration of Tc when disposed of underground, it is one of the important issues to removal them in views of the increase of disposal safety. The precipitation of Cs and Re (as a surrogate for Tc) was examined by introducing sodium tetraphenylborate (NaTPB) and tetraphenylphosponium chloride (TPPCl), respectively. Precipitation of Cs by NaTPB and that of Re by TPPCl were completed within 5 minutes. Their precipitation rates were not influenced so much by the temperature and stirring speed even if they were increased by up to $50^{\circ}C$ and 1,000 rpm. However, the pH of the solution was found to have a great influence on the precipitation with NaTPB and TPPCl. Since Mo tends to co-precipitate with Re at a lower pH, especially, it was effective that a selective precipitation of Re by TPPCl was carried out at pH of above 9 without co-precipitation of Mo and Re. Over 99% of Cs was precipitated when the ratio of [NaTPB]/[Cs]>1 and more than 99% of Re, likewise, was precipitated when the ratio of [TPPCl]/[Re]>1.

A Study on Theory of Planned Behavior of Accounting Information Classes in the Digital Convergence Era (디지털 융복합 시대에 회계정보수업의 TPB에 관한 연구)

  • Lee, Shin-Nam
    • Journal of Digital Convergence
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    • v.13 no.9
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    • pp.169-175
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    • 2015
  • The significant changes of convergence study in the 21st century is the shift from theoretical-based instruction to computer-based instruction. This study investigated the student's cognitive engagement in TPB(Theory of Planned Behavior) of accounting information classes in the Digital Convergence Era. Hypothesis test was conducted from 99 accounting information learners from four year course university in the Gyeonggi-do. A questionnaire was given and analyzed. The results showed. First, the TPB variables han a positive effect on intrinsic curiosity of students. Second, the subjective norm of TPB variables could develop student's enjoyment. Subject norm could have a positive effect on enjoyment. The results of this study may contribute to propose desirable ways of improving the psychological states in the relationship between TPB and cognitive engagement. In the future, variables of cognitive engagement will be compliment to analyze.

Comparison on Predictive Model of Intention to Use Smartphones through iPhone User: Centered on TAM, TPB & Integrated Model (아이폰 이용자를 통해 본 스마트폰의 이용의도 예측모형 비교: 기술수용모형(TAM), 계획된 행동이론(TPB) 및 통합모형을 중심으로)

  • Joo, Jihyuk
    • Journal of Digital Convergence
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    • v.11 no.1
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    • pp.89-97
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    • 2013
  • After introducing iPhone in Korea, the craze for iPhone was perceived to be extraordinaire phenomenon and the mobile businesses and researchers paid attention to it. This research purposes to explore more predictive model that explain to adopt the smartphones in Korea. This research show that all of models, TPB, TAM and the integrated model, are significant to explain intention to use the smartphones. TPB explains the higher than TAM, and the integrated model explains the slightly higher than TPB. These results suggest that researcher explore and build the more predictive model that comprise social influences and personal attributes than TAM that is employed broad to study new information communication systems and devices.

An Empirical Study of the Piracy Behavior of Online Digital Content: A Cross-Culture Comparison of China and Korea (온라인디지털콘텐츠 불법복제 행동에 관한연구 : 중국 및 한국 비교를 중심으로)

  • Zhang, Xiang-Lan;Gim, Gwang-Yong
    • 한국IT서비스학회:학술대회논문집
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    • pp.602-605
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    • 2009
  • Digital content piracy has been shown to be an emerging societal problem, However, Studies on digital content piracy are very limited. In this paper, we try to find whether Theory of Planned Behavior(TPB) can explain the online digital content piracy in China. In addition to the finding of TPB's usefulness, We also examine the cross-cultural differences between Korea and China in behavior towards online digital content piracy. we argue that cultural factors moderate the strength of the relationships in the TPB model in online digital content piracy. we use a theoretical model of behavior based on the framework of the TPB(Theory of Planned Behavior) and Hofstede's national cultural dimensions. Our results indicate that the general TPB(Theory of Planned Behavior) model of software piracy is broadly applicable to digital content piracy in China. Our findings also show that most of the hypothesized moderating effects of national cultural factors were found to be significant.

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Spectroscopic Characterization on the Aggregation Behavior of Pyronin G with Tetraphenylborate anion (Tetraphenylborate 음이온과 Pyronin G의 회합에 관한 분광학적 특성)

  • Lee, Beom-Gyu;Kim, Kang-Jin
    • Analytical Science and Technology
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    • v.8 no.1
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    • pp.47-53
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    • 1995
  • The aggregation of Pyronin G($PG^+$) with tetraphenylborate($TPB^-$) anion has been investigated in aqueous solution by absorption and fluorescence spectrophotometries. The addition of 1,4-dioxane in aqueous solution of $PG^+$ and $TPB^-$ dissociates the aggregates of PG-TPB due to the increased hydrophobicity of the mixed solvent as compared to pure water, and yields higher $PG^+$ momomer concentration than aqueous $PG^+$ solution. The aggregation is not observed in any organic solvents except in water. The absorption maxima of $PG^+$ are correlated relatively well with ${\pi}^*$ scale and $(n^2-1)/(2n^2+1)$ funtion. But better linear relationship was obtained with ${\pi}^*$ scale for alcohols.

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A Study for Pedestrian's Safety: Relating to TPB (무단횡단을 하는 보행자의 안전을 위한 연구: TPB를 중심으로)

  • Chang, Kyung
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.16 no.1
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    • pp.180-194
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    • 2015
  • On roads vehicles are the bossy, while pedestrians are the frangible. The current paper has a purpose for contributing to pedestrian's safety. First, it studies the association between demographic parameters and TPB(Theory of Planned Behavior)'s variables(pedestrian's attitude toward crossing behavior in roads, personal norm, etc.) and his/her crossing intention, perceived risk while crossing, and the experience of past traffic accidents. Its sample comes from a specific population(college students). Further, the present study endeavors to explain the portion of human cognitive failure/error, impulsiveness, time perspective, and probabilistic/math-logical judgment ability in pedestrian's riky crossings on roads. Research results found that TPB variables and such a few human characteristics have some significant association with the risky crossing intention on the road. Considering the human psychological portion in pedestrian accidents would help us prevent the accidents and reduce unhappiness of the accidents and, further, economic loss and insurance expenditure related with the accidents.