• Journal of the Korean Wood Science and Technology
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• 제32권6호
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• pp.50-56
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• 2004

This study was conducted to investigate the performance of sound absorption type-noise barriers manufactured with a combination of wood particles used for particleboard, recycled waste newspaper, and cement. An average density of wood-combined cement board was in the range from 0.83 to 0.96 g/cm³, showing relatively low-density board. Regardless of types of cement bonded board or wooden board, the board with concave holes(凹)-formed surfaces showed greater sound absorption coefficient compared to those of flat surface boards. The board density was not related with those coefficients. Accordingly, it was concluded that concave or deep corrugated surface structure has played an important role in sound absorption for the application of sound absorption type-noise barrier.

• 한국구조물진단유지관리공학회 논문집
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• 제9권1호
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• pp.119-126
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• 2005

본 연구는 H형 및 Channel형 복공판의 정적 하중에 대한 성능을 규명하는데 그 목적이 있다. 보다 향상된 복공판의 성능이 요구되어짐에 따라 보강의 가능성 및 효율성을 파악하였고, 정적재하시험 및 구조해석을 통해 시험체의 개선효과를 비교 검토하였다. 정적재하시험을 통하여 응력과 처짐을 측정하였고, 이를 FEM 해석결과와 비교하였을 때 극한 하중 및 변위, 지간 중앙부와 상 하 플랜지의 휨응력 등에서 H형 복공판은 Channel형 복공판에 비해 약 3배 이상의 높은 강성을 보유하고 있는 것으로 나타났다.

• The Journal of Asian Finance, Economics and Business
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• 제7권1호
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• pp.167-181
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• 2020

The relationship between corporate board attributes and dividend payout is already established yet mediating role of leverage in not been examined in Malaysian market. Therefore, this study aims to examine the mediating effect of financial leverage on the relationship between corporate board attributes and the dividend pay-out policy. A sample of 203 non-financial firms listed on the BURSA Malaysia between 2005 and 2018 were analysed using SmartPLS 3.0. The findings show that there is a partial mediating effect of financial leverage on the relationship between board members age, board diversity and dividend pay-out policy. Financial leverage also mediates the relationship between number of women on board, CEO-duality and dividend pay-out policy. However, financial leverage doesn't mediate the relationship between board size and dividend pay-out policy. This study offers insights to policy-makers to develop a better corporate governance as well as a guidance to firms in the construction and implementation of their corporate governance policies in relation to financial leverage. This study also shed light on the influence of efficient corporate board attributes on dividend pay-out policy and financial leverage for firm growth. This study concludes that corporate board attributes impact capital structure and thus, firms may change its payout policy.

• The Journal of Asian Finance, Economics and Business
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• 제7권4호
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• pp.81-95
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• 2020

The main objective of this research is to investigate the impact of board size and board composition on financial performance of banks. The sample of this study consists on two countries listed bank sector Pakistan and China. The annul data is used from 2009-2018 to find the objective of this study. The Panel regression model is used to check the relationship between dependent and independent variables. Return on Asset and Return on Equity is used as performance checker dependent variables. The results of this study confirm board size coefficient value positive for ROA and negative for ROE but shows insignificant behavior for Pakistani banking sector while in Chinese banking sector the coefficient value of board size positively for ROA and ROE at 10% level. The board composition coefficient shows the negatively significant with ROA but insignificantly related to ROE for Pakistani banking sector. However, in Chinese banking sector the coefficient value of board composition is insignificant for both ROA and ROE. This study is helpful for banks, management of banks, policy makers, researcher as well as Government.

• The Journal of Asian Finance, Economics and Business
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• 제7권11호
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• pp.231-239
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• 2020

The aim of this paper is to review the role of board size as part of the corporate governance system. This paper discusses one aspect of corporate governance, namely, boards, in the Indonesian context. Using the literature review method, this paper explores factors that need to be considered to determine the optimal number of boards, especially in Indonesia. We explore some determinants of board size, such as complexity and leverage, ownership structure, and financial ratio support. The results reveal that an understanding of the differences found in the two-tier board model helps us understand that the different functions of the board of commissioners and the board of directors require different test treatments from countries that adhere to one-tier systems. A review of the relationship between board size and company performance is expected to provide the corporate governance literature with insights into optimizing the sizes of boards that can improve company performance, both in terms of boards of commissioners and boards of directors. This paper proposes the simultaneous testing of board size's relationship with company performance. The results of this study are expected to make a more real contribution about the effect of board size on company performance.

• Journal of Biosystems Engineering
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• 제28권2호
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• pp.127-136
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• 2003

The top-to-bottom compression strength of corrugated board box is the most important mode of loading during it's no, and it depends largely on the edgewise compression strength of the corrugated board in the cross-machine direction and to a considerable extent on the flexural stiffness in both principal directions (CD; cross-machine direction, MD; machine direction) of the corrugated board. Corrugated board is a sandwich structure with an orthotropic property. The purpose of this study was to elucidate the principal design parameters for board combination of corrugated board from the viewpoint of bending strength through the finite element analysis [FEA] fur the various corrugated board. In general, the flexural stiffness [FS] in the MD was 2-3 times larger than that in the CD, and the effect of liner for the FS of corrugated board was much bigger than that of corrugating medium. The flexural stiffness index [FSI] was high when the stiffness of liner was in the order of inner, outer, and middle liner in double-wall corrugated board [DW], and the effect of the stiffness arrangement or itself reinforcement of corrugating medium on the FSI was not high. In single-wall corrugated board [SW] with DW. the variation of FSI with itself stiffness reinforcement of liner was much bigger than that with stiffness arrangement of liner. The highest FSI was at the ratio of about 2:1:2 for basis weight distribution of outer, middle, and inner liner if the stiffness of liner and total basis weight of corrugated board were equal in DW Secondarily. basis weight was in the order of inner, outer, and middle liner. However, the variation of FSI with basis weight distribution between liner and corrugating medium was much bigger than that with itself basis weight distribution ratio of liner and corrugating medium respectively in both DW and SW. md the FSI was high as more total basis weight was divided into liner. These phenomena fur board combination of corrugated board based on the FEA were well verified by experimental investigation.

• 디지털산업정보학회논문지
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• 제8권4호
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• pp.135-142
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• 2012

DSRC system is a communication system that consists of road side equipment and on board equipment to provide services of communication technology for intelligent transportation systems. In this paper, we carry out a short-range dedicated high-speed wireless communications via DSRC system based on board equipment that is installed in the vehicle and road side equipment through wireless channels of communication. on board equipment is system that have a memory which initialization information is stored, it loads physical layer and MAC layer, LLC layer, L7 layer in turn. In the upper, it should analyze the various commands that are sent from roadside base stations, and carry out the operation which is in accordance with the command. and also it designs the structure of protocol stack which is TRM Layer loaded that is to initialize on L7 layer and MAC layer and efficiently designs operation between on board equipment and the road side equipment.

• 한국위성정보통신학회논문지
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• 제9권4호
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• pp.42-46
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• 2014

본 논문에서는 1.55GHz에서 1.81GHz 대역을 사용하는 GNSS(Global-Navigation Satellite Service)시스템에, 단말기의 전원안정화를 위해서 PCB(Printed Circuit Board) 내층에 삽입될 코일 구조의 EBG(Electromagnetic Band Gap) 구조체를 제안 및 제작한다. 제작한 EBG 구조체의 테스트 결과, 사용 주파수 대역에서 삽입손실(S21)이 약 -50dB 이하로 측정되었다. 본 연구결과는 향후, PCB 회로 설계의 PDN(Power Delivery Network)구조의 안정화 향상 및 EMI(Electro Magnetic Interference) 대책에 효과적일 것으로 기대된다.

• 한국결정성장학회지
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• 제21권1호
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• pp.27-33
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• 2011

Carbon Board는 전자파 차폐 신소재로서 Design을 접목하여 Art Wall로 개발될 수 있으며, 친환경 건축 소재를 벽체 시공재로 이용할 경우, 마감재로도 사용될 수 있음이 파악되었다. Carbon Board의 필요성이 증가하고 있는 경향에 따라서, Module 구조를 가진 Tile, Panel 형태의 목판에 요구되는 그림, (성형)조각, 및 Graphic Design, Motif의 재구성 또는 결합으로 전체를 접착하거나, Point 부분만 장식하여 다양한 Style과 새로운 표현을 만들어 낼 수 있다. 본 논문은 인테리어산업에서 기대되는 목판화 기법의 Pattern Design을 MDF(Medium Density Fiber) Board와 Carbon Board에 적용하여, 내구력의 유용성에 관련하는 구조적, 물리적 특성을 비교하였다. (1) 정형(조립) (2) 표면(개량) (3) 세공(&조형)의 Detail Pattern과 Trimming Technique은 주로, 재질의 경도와 관련 밀도에 따라 Design의 변화를 나타내는 분석에서, Carbon Board도 MDF Board와 접합, 연결하여 Living system의 가치를 창조하고, 휴머니즘을 나타낼 수 있는 고급 내장재로서의 적용 가능성을 확인하였다.

• 한국소음진동공학회논문집
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• 제26권4호
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• pp.365-374
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• 2016

The underwater radiated noise can be reduced by decreasing the structure borne noise of the on-board equipment. Therefore, the structure borne noise of the onborad installed equipment is strongly restricted by ROK navy with MIL-Std 740-2. Usually, the vibration transmissibility from the equipment to the hull of the ship is dependent on its mount characteristics. Even though the double mount structure is proper to apply for ship board application rather than single mount, it is not widely applied due to the weight and volume resriction of the ship. Therefore, in this research, the base using sandwitch panel which can act as double mount structure is suggested and its noise reduction capacity is verified with analytic calculation as well as experiment.