• 생물정신의학
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• 제13권2호
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• pp.82-94
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• 2006

Objectives : In order to explore effects of board-game therapy for cognitive rehabilitation in patients with schizophrenia, we investigated the change of executive cognitive function over a 2-month period of board-game therapy in patients with schizophrenia. Methods : Two groups of chronic schizophrenic inpatients were participated in this study. One group(n=21) were treated with board-game therapy for 2 months and the other control group(n=19) were not treated. For the evaluation of the executive cognitive function, a Wisconsin Card Sorting Test(WCST) was administered before and after the introduction of the board-game therapy. PANSS score change was also evaluated. Result : At the beginning of this study, there was no significant difference in performance of cognitive function tests, demographical data or clinical severity between both patient groups. After 2 months of treatment with the board-game therapy, the board-game therapy group showed significant improvements of executive cognitive function without any significant change of their schizophrenic symptoms. On the contrary, there was no change in control group. Conclusion : This study showed that a board-game therapy is effective for the enhancement of executive cognitive function in patients with chronic schizophrenia. A board-game therapy could be introduced with ease into psychiatric fields, such as inpatients' or outpatients' clinic wards and day hospital. Our result indicates that the board-game therapy is a promising tool for the enhancement of cognitive function, especially executive cognitive function and helpful for cognitive rehabilitation for schizophrenic patients.

• The Journal of Asian Finance, Economics and Business
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• 제5권2호
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• pp.53-61
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• 2018

Corporate governance has received massive attention in academic research nowadays due to several recent corporate failures. Inefficiency of corporate governance mechanisms have driven the minds of the researchers and the policy makers to look with more insights into this area. Board composition, as part of corporate governance mechanism, plays a significant role to achieve company's goals or objectives and ensure transparency and accountability. The objective of this study is to find out the efficiency of board composition through board size, independent directors and female directors on firm performance in the listed manufacturing firms of Bangladesh. In this study, a sample of 162 firm years are considered as the sample during the period of 2011 to 2016. This study finds that large board is the significant explanatory variable in improving firm performance. This study also shows that board independence and female directors have no significant association with firm performance which implies that instrument of corporate governance mechanism particularly board composition is very weak. This study recommends that code of corporate governance, specially the role of independent directors and female directors, should be reformed in the light of cultural and institutional context along with the effective enforcement.

• 한국항공우주학회지
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• 제43권1호
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• pp.79-87
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• 2015

본 논문에서는 확장 칼만 필터(Extended Kalman Filter)를 이용하여 On-board상에 적용 가능한 궤도 결정 방안을 제시하고 GPS 수신기에 적용하여 그 결과를 분석하였다. 이때, On-board 상의 제한된 자원을 감안하여 본 연구에서는 $J_2$ 궤도 전파 모델과 GPS 항행해를 이용하여 궤도 결정을 수행하였으며 현재 운용 중인 두바이셋-2(DubaiSat-2) 인공위성에 적용한 결과를 분석하였다. 분석 결과 GPS 항행해에서 불규칙하게 발생하는 수 km의 큰 오차가 제거되었고 위치 오차는 70.26 m에서 26.25 m로 65% 감소하였으며 속도 오차는 3.6 m/s에서 0.044 m/s로 96% 감소하여 정밀도가 향상된 것을 확인할 수 있었다.

• International Journal of Railway
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• 제5권2호
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• pp.77-83
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• 2012

Railroad signaling systems are to control intervals and routes of trains. There are ATS, ATP, ATO and ATC system. Trains are operated in the section which is met on the signaling system because various signaling systems are used in Korea. Hence, trains are not operated in the section which is used in the other signaling system. To solve this problem, recently combined on-board system has been developed. The combined on-board system designed by doubling the ATS, ATP and ATC system to ensure the safety of system. The inductance of antenna is change and in return the resonance frequency of antenna is varied by the electromagnetic induction. Therefore, the information signal is not received exactly in the combined on-board system and in return accidents between trains occur. In this paper, electric model of the combined on-board system for considering the ATS and ATP antenna is presented. Moreover, the mutual inductance including the distance between the ATS and ATP antenna is calculated. As a result of the frequency response of the antennas, the mutual inductance met on operation range of resonance frequency is defined.

• The Journal of Asian Finance, Economics and Business
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• 제7권6호
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• pp.351-363
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• 2020

The objective of this paper is to explore how board gender diversity affects corporate sustainability performance. Therefore, this paper examines the direct association between board gender diversity with corporate sustainability performance and the mediation effect of enterprise risk management (ERM) on this association. The study employed a cross-sectional survey method. Data were collected from annual reports, websites, and through the questionnaires that were distributed to Chief Financial Officers (CFOs) of all the listed companies of Dhaka Stock Exchange, Bangladesh. The partial least square technique of Structural Equation Modelling (SEM) approach was employed for data analysis. The result did not find support for the direct association between board gender diversity and sustainability performance in Bangladesh context. This implies that contextual factors, such as, male-dominant board, appointment of female directors based on family ties, lack of education and expertise etc. may discount gender diversity direct influence on sustainability performance. However, the study finds strong support for the mediating role of ERM use within the corporate structure. Further analysis of indirect effect suggests that ERM use mediates the relationship of board gender diversity and sustainability performance in full. This implies that in the Bangladesh context effective use of ERM is highly recommended.

• The Journal of Asian Finance, Economics and Business
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• 제8권11호
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• pp.235-242
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• 2021

The paper aims to examine the relationship between the Board of Directors' characteristics and the timeliness of financial statements of listed firms in Vietnam. Accordingly, research data was collected from the FiinPro Platform database system, which included financial statements of 548 organizations listed on the Hochiminh Stock Exchange and the Hanoi Stock Exchange from 2013 to 2018. The paper employs the OLS regression method with a strong standard error method and FGLS to handle the problem of variable variance and autocorrelation. The research results show that the following three factors have significant impacts on the timeliness of financial statements: the duality of Chairman, the age of Chairman, and the change of members of the Board of Directors. The findings suggest that the duality of the Chairman of the Board of Directors will lead to a decrease in control effectiveness, adversely affecting the timeliness of the financial statements. In addition, the change of members in the Board of Directors will lead to a positive change in the timely provision of information. The age of the Chairman of the Board of Directors also positively impacts the timeliness of financial statements.

• The Journal of Asian Finance, Economics and Business
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• 제9권4호
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• pp.213-228
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• 2022

This paper investigates the association between key corporate governance characteristics and the performance of general insurance businesses listed on the Saudi stock exchange (TADAWUL). The methodology for the study is based on a pooled data collection for 11 Saudi general insurance companies from 2011 to 20. The linear regression model and the logarithm regression model are suggested to assess the relationship between performance and corporate governance characteristics. The dependent variable is firm performance measured using ROA, ROE, and Tobin's Q. The independent variables are corporate governance variables consisting of a complete set of board and audit committee characteristics. Insurer-specific control variables are introduced. The empirical results reveal that the characteristics of corporate governance influence the performance of insurance companies. In particular, the board size, board's tenure, the proportion of independent directors in the board, audit committee size, audit committee meeting frequency, and proportion of health insurance premiums have a positive impact. However, audit committee independence, size of the company, and proportion of reinsurance premiums have a negative impact on the performance of the Saudi general insurance companies. Finally, the empirical results indicated also that there is an unclear relationship between the performance and board meeting frequency, compensations of the Board, and the average age of the Board.

• 한국음향학회지
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• 제37권5호
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• pp.323-330
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• 2018

본 연구에서는 흡음 석고보드 천장재에 의한 바닥충격음 저감 효과를 조사하기 위해 잔향실에서의 흡음률 측정과 바닥충격음 성능평가 시험동에서의 바닥충격음 성능평가를 실시하였다. 먼저, 흡음률 측정은 흡음 석고보드, 흡음석고보드+글라스울, 흡음 석고보드 이중 천장재(흡음 석고보드+글라스울+흡음 석고보드)를 대상으로 실시하였다. 측정결과, 흡음 석고보드의 경우 200 Hz과 630 Hz 대역에서 약 0.1~0.5의 흡음률을 나타냈으며, 글라스울을 추가하였을 때 전체 측정 주파수대역(50 Hz ~ 630 Hz)에서 흡음률이 상승하였다. 흡음 석고보드를 추가 설치하였을 때 250 Hz 대역까지 흡음률이 크게 상승하였으나, 315 Hz 이상 대역에서는 흡음률이 감소하였다. 상기 3개의 흡음석고보드 및 일반 석고보드 천장재와 맨슬래브(천장 무) 대상으로 바닥충격음 차단 실험동에서 바닥충격음 차단성능 측정을 실시하였다. 측정결과, 흡음석고보드+글래스울과 흡음석고 보드 이중 천장재의 일반 석고보드 대비 중량충격음의 저감량은 단일평가지수 기준으로 3 dB ~ 4 dB인 것으로 나타났다. 맨슬래브 대비 중량충격음의 저감은 주로 125 Hz ~ 500 Hz 대역에서 발생하였으며 250 Hz 대역에서 최대의 저감량을 나타냈다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2010년도 추계학술대회 논문집
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• pp.387-388
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• 2010

• 디지털융복합연구
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• 제20권1호
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• pp.257-263
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• 2022

코로나 시대를 맞고 있는 현 시대에 '언택트화'가 가속화 되어 가면서 보드게임의 긍정적 가능성이 새롭게 부각되고 있다. 이러한 상황은 앞으로 보드게임을 이전보다 재미있고 질 높은 그리고 교육적으로 어떻게 개발을 하느냐에 따라 보드게임 산업 발전에 긍정적인 영향을 줄 수 있는 기회라고 볼 수 있을 것이다. 이를 위해 본 연구는 보드게임 개발자 및 전문가들의 더욱 발전적인 보드게임 개발을 위해 선행적 연구 및 방법론 중 보드게임 개발 시 중요한 요인들에 대한 상대적 중요도를 도출하는 방법론을 제시해 보고자 한다. 이는 보드게임 개발자, 전문가를 대상으로 보드게임 개발 시의 중요한 요인들을 델파이법을 통해 도출하고, 도출된 요인들의 상대적 중요도에 대한 순위를 위해 순위형식의 델파이법을 사용하였다. 본 연구에서는 보드게임 중 놀이카드 개발 모형에 초점을 맞추었다. 우선순위 분석결과, 개발 및 기획 구성, 선행연구 분석, 초안제작, 제작, 타당화, 적용 및 평가 순으로 그 중요도가 도출이 되었다. 본 연구의 결과는 기업에서 보드게임을 개발하고자 할 때 중요도에 따라 개발의 우선순위를 정하고 활용할 수 있는 실무적인 지침을 제공할 것으로 본다.