• 한국환경과학회지
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• 제26권9호
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• pp.1087-1099
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• 2017

Emergy methodology was used to analyze the biophysical basis of Korean agriculture and assess its sustainablility. Total yearly emergy input into Korean agriculture was $7.72{\times}10^{22}sej/yr$ in 2013. Purchased inputs were the dominant emergy source, accounting for 90.1% ($6.95{\times}10^{22}sej/yr$) of the annual input. This clearly indicates that the Korean agriculture is a modern, industrialized system that depends mostly on market goods and services derived from nonrenewable resources. The monetary equivalent of the total emergy input was 18.9 trillion \/yr, 1.5 times greater than the total production cost from farm expense surveys. Emergy return on investment of Korean agriculture was low, with an emergy yield ratio of 1.11. Korean agriculture appears to exert pressure on the environment as revealed by the high environmental loading ratio of 9.30. With very low emergy input from renewable sources (9.7%) and high environmental pressure, Korean agriculture is not sustainable, with an emergy sustainability index of 0.12. This study suggests that higher use efficiency of and lower dependence on nonrenewable purchased inputs need to be prioritized in an effort to enhance the sustainability of Korean agriculture.

• 동아시아경상학회지
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• 제7권4호
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• pp.41-49
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• 2019

Purpose - This paper empirically investigates what factors contribute to corporate investments under financial constraint condition in the Korean stock market. In the paper, tangible assets' growth rate and fixed assets' growth rate were employed as investment performance and total assets were also used for comparison purpose. Research design and methodology - Samples are constructed by manufacturing firms listed on the stock market of Korea as well as those who settle accounts in December from 2001 to 2018. Financial institutions are excluded from the sample as their accounting procedures, governance and regulations differ. This study adopted a fixed panel regression model to assess the sample construction including yearly and cross-sectional data. Results - This results support the literatures that major shareholders showed positive significance to investment in financially unconstrained firms and no significance to investment in financially constrained firms. ROA showed positive significance to investment in financially unconstrained and constrained firms, whereas firm size showed negative significance to investment in financially unconstrained and constrained firms. Debt showed no positive significance to investment in financially unconstrained firms and negative significance to investment in financially constrained firms. Conclusions - This paper documented evidence that ROA and firm size are important factors to investment irrespective of firms' financial constraints. And this paper also supports that major shareholders give positive impact to investments in financially unconstrained firms. This means that financial constraints itself rule corporate' investment decision in financially constrained firms.

• KDI Journal of Economic Policy
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• 제26권2호
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• pp.143-178
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• 2004

엄밀한 성장요인 분석을 위해서는 취업자수 및 인적 물적 자본스톡 뿐 아니라 취업자의 평균 취업시간 및 취업시간 변화에 따른 노동능률의 변화를 동시에 고려하여야 한다. 본 연구에서는 구간별로 발표되고 있는 주당 취업시간별 취업자수 통계에 최우추정법을 적용하여 총취업자의 단위 기간당 취업시간의 분포를 추정하고, 임금통계를 이용하여 단위 기간당 취업시간 변화에 따른 노동의 능률변화패턴을 추정한 후, 이를 결합하여 1963~2003년 기간중 총취업자의 주당 취업시간과 노동능률지표를 추정하였다. 추정결과에 따르면 주당 취업시간이 40시간일 때에 노동의 능률이 최대화되며, 1963~2003년 기간중 노동능률지표의 연평균 증가율은 0.14%로 계산되었다.

• The Journal of Asian Finance, Economics and Business
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• 제7권9호
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• pp.105-115
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• 2020

The study empirically examines the effects of loan portfolio diversification on bank risk and return in the nascent banking market of Vietnam. Loan portfolio diversification is captured through the Hirschman-Herfindahl index and the Shannon Entropy with sectoral exposures. We access each bank's financial reports to collect the required data, especially the breakdown of sectoral loan portfolios, thus constituting a unique dataset. To compute bank return, we use the traditional accounting indicators, including return-on-assets, return-on-equity, and net-interest margin. For bank risk, we utilize the loan-loss provisions and non-performing loans relative to gross customer loans. Using a sample of 30 commercial banks over the period from 2008 to 2019 and the system generalized method of moments estimator for the dynamic panel, we indicate the downsides of portfolio diversification. Concretely, we observe that all diversification measures exhibit significantly negative signs in all regressions across different bank return proxies. At the same time, the estimates display the significant and positive impact of diversification on the non-performing loan ratio. Hence, sectoral loan portfolio diversification significantly hampers bank performance in both aspects of lower return and higher credit risk. The results are robust across a rich set of bank performance and portfolio diversification measures.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2011년도 학술발표회
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• pp.285-285
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• 2011

우리나라의 하천 상류지역의 유역들은 신뢰할 수 있는 수문자료의 미비로 인하여, 관행적으로 모형의 변수를 산정하여 강우유출모형을 적용하고 있다. 그러나 상류지역의 빈번한 홍수 피해 및 수자원관리의 문제발생 등으로 인하여 이러한 상류지역의 중소유역의 신뢰할 수 있는 홍수량산정 방법이 요구되고 있다. 이는 영국의 국가 홍수량 산정 표준방법(Flood Estimation Handbook)과같이 강우유출모형의 지역화를 통하여 해결 할 수 있다. 지역화를 위한 강우유출모형의 선정을 위하여 9개의 개념적 강우유출모형을 충청북도 미호천 상류 7개의 소유역에 적용하여 모형의 성능을 평가하였다. 이는 유효우량 산정을 위한 3개의 개념적 토양저류함수 모형(Soil Moisture Accounting: Modified Penman Type Model(MP), Catchment Wetness Index Model(CWI), Probability Distribution Model(PDM))과 3개의 유역유출을 위한 3개의 개념적 유출모형(Routing: 2-Conceptual Reservoir Model(2PAR), 3-Conceptual Reservoir Model(3PAR), Marcropore Model(2PMP))의 조합으로 총 9개의 모형을 검토하였다. 이를 검정기간(2004.01.01-2007.12.31) 과 검증기간(2008.01.01-2009.12.31)의 장단기 유출성능을 Nash Sutcliffe Efficiency 로 평가한 결과, 시간 단위의 단기모의에서는 CWI-2PMP와 PDM-2PMP모형이, 일 단위의 장기모의에서는 CWI-3PAR와 PDM-2PMP가 우수한 성능을 보이고 있다. 향후 금강 상류유역의 기본 강우유출모형으로 PDM-2PMP모형을 선정한다.

• The Journal of Asian Finance, Economics and Business
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• 제7권11호
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• pp.699-705
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• 2020

This study aims to examine the antecedent factors of debt policy on the influence of firm growth on firm value. There was a total of 19 companies involved accounting for 95 observational data from a population of 169 companies listed on the Kompas 100 Index of the Indonesia Stock Exchange from 2014 to 2018. The data were analyzed through descriptive statistics, classic assumption tests, multiple regression, and hypothesis testing. The results prove that the firm growth, proxied by asset growth or sales growth, did not have a significant influence on the debt policy. Further, there was no significant influence of debt policy on firm value when using debt ratio and also dividend policy as a control variable. In contrast, there was a positive and significant influence on the firm value when using debt to equity ratio proxy, both with or without using the control variable. Therefore, the debt policy was not proven as an antecedent on the influence of firm growth on firm value. This finding implies that there was a tendency for the company management to adopt the policy, which would increase the debt ratio to increase the investors' confidence in the stock market and investors neglect the company's dividend policy.

• 근관절건강학회지
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• 제23권1호
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• pp.39-48
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• 2016

Purpose: This study was conducted to determine factors that influence overactive bladder (OAB) symptom severity in community residents. Methods: The participants of the study were 115 adults who participated in the health lectures for patients with OAB between March 1 and June 30, 2013. The overactive bladder-questionnaire (OAB-q) was used to assess the OAB symptom severity. Results: The mean score of OAB symptom severity was 35.48 out of 100. Participants showed the highest score of urgency among OAB symptoms. The significant predictors were the monthly income, operation history of urogynecology, and body mass index accounting for 23% of the variance of OAB symptom severity. The OAB symptom severity was higher in subjects who had lower monthly income, urogynecology operation history and higher BMI (>$25kg/m^2$). Conclusion: The findings of this study demonstrate that it should be considered to recommend weight loss as a component of nursing intervention for alleviating OAB symptom severity in overweight OAB patients.

• Earthquakes and Structures
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• 제7권3호
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• pp.349-365
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• 2014

The dynamic response of structures under extremely short duration dynamic loads is of great concern nowadays. This paper investigates structures' response as well as the associated structural damage to explosive loads considering and ignoring the supporting soil flexibility effect. In the analysis, buildings are modeled by two alternate approaches namely, (1) building with fixed supports, (2) building with supports accounting for soil-flexibility. A lumped parameter model with spring-dashpot elements is incorporated at the base of the building model to simulate the horizontal and rotational movements of supporting soil. The soil flexibility for various shear wave velocities has been considered in the investigation. In addition, the influence of variation of lateral natural periods of building models on the obtained response and peak response time-histories besides damage indices has also been investigated under blast loads with different peak over static pressures. The Dynamic response is obtained by solving the governing equations of motion of the considered building model using a developed Matlab code based on the finite element toolbox CALFEM. The predicted results expressed in time-domain by the building model incorporating SSI effect are compared with the corresponding model results ignoring soil flexibility effect. The results show that the effect of surrounding soil medium leads to significant changes in the obtained dynamic response of the considered systems and hence cannot be simply ignored in damage assessment and response time-histories of structures where it increases response and amplifies damage of structures subjected to blast loads. Moreover, the numerical results provide an understanding of level of damage of structure through the computed damage indices.

• Journal of Contemporary Eastern Asia
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• 제20권2호
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• pp.63-84
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• 2021

The present study was conducted to understand the turmoil effects of COVID-19 pandemic on the Malaysian stock market during the different periods of the Movement Control Order (MCO). The present study was based on the secondary data extracted from the DataStream and Bloomberg from 2nd January 2020 to 29th May 2020 to evaluate the effects of COVID-19 pandemic on the Malaysian stock market. The findings suggested that during the different periods of the Movement Control Order (MCO) from the 1st January to 29th May 2020, the COVID-19 pandemic adversely affected the performance of KLCI index and all sectoral indices. The weakest performance indices were energy, property, and finance while the least affected indices were healthcare, technology, telecommunications, and media. This paper provides a review of the impacts of COVID-19 pandemic on the Malaysian stock market throughout the different periods of MCO.

• The Journal of Asian Finance, Economics and Business
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• 제8권2호
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• pp.643-655
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• 2021

This study investigated the effect of the Amanah Ikhtiar Malaysia (AIM) microfinancing on the economic, social, and household empowerment of women borrowers in Malaysia. The study used a quantitative approach based on primary data. For this study, the participants comprised 384 AIM borrowers from Terengganu, Kelantan, and Pahang in the east coast region of Malaysia. Purposive stratified random sampling was used as well as the Krejcie and Morgan method to count the number of samples. Descriptive statistics and the Women Empowerment Index (WEI) were used in the analysis. The study findings reveal that AIM microfinancing affects the economic, social, and household empowerment of women borrowers in Malaysia. However, in comparing the three categories, women enjoyed more freedom in social and household decision-making than in economic decision-making. The present study recommends policies for the successful and effective operation of microfinance programs by providing the necessary guidelines for the control of AIM loan for women borrowers; increasing income-generating activities, sufficient access of credit, and proper education for the borrowers; and giving economic freedom of choice with necessary skill training policymaking options for the government and NGOs with the aim to improve the total household income and empowerment of the microcredit borrowers in Malaysia.