• Title/Summary/Keyword: CFP

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Shear Experiments on Concrete Filled PHC Pile with Composite Shear Connectors with Rebar Holes (보강 철근 정착 홀을 갖는 합성 전단연결재를 적용한 콘크리트 충전 PHC말뚝의 전단성능 평가)

  • Kim, Jeong-Hoi;Park, Young-Shik;Min, Chang-Shik
    • Journal of the Korea Concrete Institute
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    • v.29 no.3
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    • pp.259-266
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    • 2017
  • The purpose of this study was to contribute to the field application cost effectively and reasonably by developing the functional piles that reinforces shear force. CFP pile (Concrete Filled Pretensioned Spun High Strength Concrete Pile with Ring type Composite shear connectors) developed in this study increases the shear stress by placing composite shear connector and filling the concrete into hollow part of the pile. By placing the reinforcement (H13-8ea) and the reinforcement (H19-8ea) into hollow section inside of PHC piles, it also improves the shear strength due to increasing steel ratio. It reinforces shear strength effectively by dowel force that is generated by putting reinforcement (H13-8) into the holes of composite shear connectors for the composite behavior of filled concrete and PHC pile. The study was reviewed and compared the calculated result of the shear strength by limit state design method highway bridge design standards (2012) and experiment result of the shear strength by KS F 4306. We can design the shear strength reasonably as the safety ratio of 2.20, 2.15, 2.05 is shown comparing to design shear strength, according to design shear strength on each cross sections and the experiment results of the CFP pile.

Finite Element Analysis on Reinforced Concrete Filled PHC Pile with Ring Type Composite Shear Connectors (링형 합성 전단연결재를 적용한 철근 콘크리트 충전 PHC말뚝의 유한요소해석)

  • Kim, Jeong-Hoi;Lee, Doo-Sung;Park, Young-Shik;Min, Chang-Shik
    • Journal of the Korea Concrete Institute
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    • v.29 no.3
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    • pp.249-257
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    • 2017
  • The purpose of this study was to contribute to the field application cost effectively and reasonably by developing the functional piles that make up for the defects of PHC piles. CFP (Concrete Filled Pretensioned Spun High Strength Concrete Pile with Ring type Composite shear connectors) piles developed in this study increases the compressive stress through enlarged cross section by rearranging composite shear connectors and filling the hollow part of PHC pile with concrete. And it improved shear and bending performance placing the rebar (H13-8ea) within the PHC pile and the hollow part of PHC pile of rebar (H19-8ea). In addition, the composite shear connectors were placed for the composite behavior between PHC pile and filled concrete. Placing Rebars (H13-8ea) of PHC pile into composite shear connector holes are sleeve-type mechanical coupling method that filling the concrete to the gap of the two members. Nonlinear finite element analyzes were performed to verify the performance of shear and bending moments and it deduced the spacing of the composite shear connectors. Through a various interpretation of CFP piles, it's proved that the CFP pile can increase the shear and bending stiffness of the PHC pile effectively. Therefore, this can be utilized usefully on the construction sites.

Comparison of the Mercury Intrusion Porosimerty, Capillary Flow Porometry and Gas Permeability of Eleven Species of Korean Wood

  • Jang, Eun-Suk;Kang, Chun-Won;Jang, Sang-Sik
    • Journal of the Korean Wood Science and Technology
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    • v.46 no.6
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    • pp.681-691
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    • 2018
  • The typical methods of mercury intrusion porosimetry (MIP) and capillary flow porometry (CFP) were used to evaluate the pore size of cross-section of wood and the effect of the pore structure on the permeability of wood was analyzed in this study. The results of this study were as followings: The pore size of wood measured by CFP was larger than that measured by MIP except for Lime tree, Korean red pine and Paulownia. Among the three pore types of porous materials defined by IUPAC (through pores, blind pores, and closed pores), only through pores are related to permit fluid flow. MIP measures the pore size of both through pores and blind pores, while CFP measures the pore size of only constricted through pores. Therefore, pore size measured by MIP was not related to gas permeability, however pore size measured by CFP had a proportional relationship with gas permeability.

Two-Phase Hidden Markov Models for Call-for-Paper Information Extraction (논문 모집 공고에서의 정보 추출을 위한 2단계 은닉 마코프 모델)

  • Kim, Jeong-Hyun;Park, Seong-Bae;Lee, Sang-Jo
    • Annual Conference on Human and Language Technology
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    • 2005.10a
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    • pp.7-12
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    • 2005
  • 본 논문은 은닉 마코프 모델(hidden Markov Model: HMM)을 2 단계로 적용하여 논문 모집공고(Call-for-Paper: CFP)에서 필요한 정보를 추출하는 방법을 제안한다. HMM은 순차적인 흐름의 정보를 담고 있는 데이터를 잘 설명할 수 있으며 CFP가 담고 있는 정보에는 순서가 있기 때문에, CFP를 HMM으로 설명할 수 있다. 하지만, 문서를 전체적으로(global) 파악하는 HMM만으로는 정보의 정확한 경계를 파악할 수 없다. 따라서 첫 번째 단계로 CFP문서에서 구(phrase) 단위를 구성하는 단어의 열에 대한 HMMs을 통해 국부적으로(local) 정보의 경계와 대강의 종류를 파악한다. 그리고 두 번째 단계에서 전체적인 문서의 내용 흐름에 근거하여 구축된 HMM을 이용하여 그 정보가 세부적으로 어떤 종류의 정보인지 정한다. PASCAL challenge에서 제공받은 Cff 말뭉치에 대한 첫 번째 단계의 실험 결과, 0.60의 재현률과 0.61의 정확률을 보였으며, 정확률과 재현률을 바탕으로 F-measure를 측정한 결과 0.60이었다.

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The Effect of Corporate Social Responsibility on Religiosity, Individual Social Responsibility, and Corporate Financial Performance in South Korea

  • JANG, Sumi
    • The Journal of Asian Finance, Economics and Business
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    • v.8 no.8
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    • pp.525-532
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    • 2021
  • The study investigates the mediating effect of Korean firms' corporate social responsibility (CSR) in the relationship between Korean executives' religiosity, their individual social responsibility (ISR), and corporate financial performance (CFP). As executives lead the firms' strategies and policies, their religiosity or ISR may have a significant influence in attaining the firm's CSR and influencing CFP. The upper echelon theory, agency theory, and stakeholder theory are used to explain the link between individual-level drivers of CSR, a firm's CSR, and CFP. The upper echelon theory, agency theory, and stakeholder theory are integrated into the conceptual model, which explains the relationships between proposed constructs in this study. This study employs survey data of 421 Korean companies. The confirmatory factor analysis (CFA) technique was used to test the proposed hypotheses. The main result shows that Korean executives' religiosity and their ISR positively influence CFP when mediated by CSR. The findings of this study suggest that Korean executives' personal values such as their religiosity and ISR can impact the firm's CSR activities or financial performance. Overall, this paper responds to the recent calls in the CSR literature to examine the individual-level drivers from non-western contexts by shedding more light on the Korean context.

Globalization, Corporate Social Responsibility and Corporate Financial Performance: Evidence from Korea (글로벌화, CSR 그리고 기업의 재무적 성과: 한국기업을 중심으로)

  • Byun, Sun-Young;Nam, Hyun-Jung
    • Management & Information Systems Review
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    • v.36 no.1
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    • pp.161-180
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    • 2017
  • This article studies the theory of corporate social responsibility; CSR. By examining the flow of CSR in the Korean market and empirical testing, investigates the relationship between CSR and corporation financial performance (CFP) in Korean enterprises. This paper places emphasis on the change in CSR as a result of globalization and explores the influence of CSR on CFP by using data from 2008 to 2014 of 528 Korean Firms, 1583 time series observations. We found that globalization had a positive influence on Korean CFP and that CSR activities derived from globalization exert a positive influence on CFP. Our findings show that CSR can strengthen the positive influence of globalization on CFP, and the Korean corporations' changing perception of CSR.

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DF(Dynamic and Flexible)-MAC : A Flexible MAC Protocol for WBAN (DF(Dynamic and Flexible)-MAC : WBAN을 위한 유연한 MAC 프로토콜)

  • Seo, Young-Sun;Kim, Dae-Young;Kim, Beom-Seok;Cho, Jin-Sung
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.36 no.8A
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    • pp.712-722
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    • 2011
  • Wireless body area network(WBAN) provide communication service in the vicinity of the body. Since WBANs utilize both MICS frequency band for implant medical applications and ISM frequency band for medical and consumer electronics(CE) applications. Therefore, MAC protocols in WBAN should be designed considering flexibility between medical and CE applications. In this paper, we identify the requirements of WBAN MAC protocols and propose a WBAN MAC protocol which satisfies the requirements. In other to provide transmission flexibility for various applications. we present the dynamic CFP allocation and opportunity period. Extensive simulation result show that the proposed protocol achieves improved throughput and latency in WEAN environment cimpared with IEEE 802.15.4.

Study for the Production of Immunodeficiency Animal for Xenotransplantation

  • D. I. Jin;Lee, S. H;J. H. An;Y. G. Ko;Kim, H. J.;Lee, S. H.;Park, C. S.
    • Korean Journal of Animal Reproduction
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    • v.26 no.4
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    • pp.347-351
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    • 2002
  • Transgenes in HSY-TK gene driven by the lck promoter was tested for the expression in immune cells (Jurkat cells) to apply xenotransplantation of human cells into transgenic animals for the potential use of the proliferation or differentiation of human stem cells in the large animal such as an pig. Also, lck-CFP gene was used for transfection experiment into Jurkat cell to confirm the proper regulation of lck promoter for transgene expression in the T cells. Transfection of lck-GFP gene into Jurkat ceils induced CFP expression in transfected cells. The expression of Ick-TK and Ick-CFP genes was confirmed by RT-PCR using RNAs extracted from Jurkat cells, When Jurkat cells transfected with TK and CFP genes were selected against G418 or gancyclovir treatments, Jurkat cells transfected with TK gene were not proliferated in G4i8 and gancyclovir medium while intact cells or cells transfected with CFP gene could grow in gancyclovir medium. However, Jurkat cells transfected with TK or GFP gene were proliferated in G418 medium probably due to Neo$^{r}$ gene in the vector. Gancyclovir treatment destroyed Jurkat cells expressing TK gene indicating that T-cells expressing TK gene can be selectively eliminated by TK gene expression driven by lck promoter.

A Study on Financial Planning Services in the U. S. (미국의 재무 설계 서비스에 대한 고찰)

  • YUh Yoon Kyung;Bae Mi Kyeong
    • Journal of Family Resource Management and Policy Review
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    • v.8 no.1
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    • pp.15-28
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    • 2004
  • Financial planning in the United States has evolved since 1980 from a field comprised of specialists, such as insurance agents, bankers, accountants, and stock brokers, offering particular services to clients, to the situation today, where most professionals offering financial services to households market themselves as comprehensive financial planners. The breadth of knowledge required for financial planning can be seen in the 106 topics covered by the Certified Financial Planner(CFP) Exam. This study reviews the actual conditions of financial planning in the U.S. including suppliers of financial services to household, the philosophy of financial planning, and the financial planning process as described by the CFP Board. Also, this study discusses related research about problems and challenges faced by households in financial planning in the U.S.

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A STRESS ANALYSIS FOR A COATED FUEL PARTICLE OF A HTGR USING A FINITE ELEMENT METHOD

  • Kim, Young-Min;Cho, Moon-Sung
    • Nuclear Engineering and Technology
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    • v.41 no.8
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    • pp.1087-1100
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    • 2009
  • A finite element method utilizing the Galerkin form of the weighted residuals procedure was developed to estimate the mechanical behavior for a coated fuel particle (CFP) of a high temperature gas-cooled reactor (HTGR). Through a weak formulation, finite element equations for multiple layers were set up to calculate the displacements and stresses in a CFP. The finite element method was applied to the stress analyses for three coating layers of a tri-isotropic coated fuel particle (TRISO) of a HTGR. The stresses calculated by the finite element method were in good agreement with those from a previously developed computer code and depicted the typical stress behavior of the coating layers very well. The newly developed finite element method performs a stress analysis for multiple bonded layers in a CFP by changing the material properties at any position in the layers during irradiation.