• Journal of Power Electronics
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• 제14권4호
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• pp.621-631
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• 2014

To invigorate the tapped-inductor boost (TIB) topology in emerging high step-up applications for off-grid products, a lossless snubber consisting of two capacitors and three diodes is proposed. Since the switch voltage stress is minimized in the proposed circuit, it is allowed to use a device with a lower cost, higher efficiency, and higher availability. Moreover, since the leakage inductance is fully utilized, no effort to minimize it is required. This allows for a highly productive and cost-effective design of the tapped-inductor. The proposed circuit also shows a high step-up ratio and provides relaxation of the switching loss and diode reverse-recovery. In this paper, the operation is analyzed in detail, the steady-state equation is derived, and the design considerations are discussed. Some experimental results are provided to confirm the validity of the proposed circuit.

• 경영과정보연구
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• 제39권2호
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• pp.1-15
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• 2020

많은 기업들은 정보통신기술(ICT)을 이용하여 생산성을 향상시키고 있다. 이러한 정보통신기술의 사용은 자원기반 관점에서 주장하는 불확실한 환경에 대응한 기업의 경쟁우위를 창출하기 위한 하나의 과정으로 이해된다. 그러나 새로운 정보통신기술의 도입이 항상 업무 효율과 생산성 향상을 만들어내 것은 아니라, 오히려 새로운 정보통신기술의 도입이 기업 성과를 저해하는 요인으로 작용하는 경우도 있다. 테크노스트레스는 새로운 기술환경에 사용자가 적응하지 못할 때 사용자가 받게 되는 부작용을 의미한다. 즉, 새로운 정보통신기술의 이용에서 나타나는 부적 영향이 테크노스트레스라 할 수 있다. 이에 본 연구는 기업의 조직 구성원의 테크노스트레스가 반생산성에 미치는 영향을 규명하였다. 본 연구는 기존의 연구와는 달리, 대구지역 기업의 종사자들을 대상으로 연구를 수행하였으며, 혁신저항과 반생산적 과업행동을 종속변수로 활용하였다. 실증분석의 결과는 테크노스트레스가 반생산적 과업행동과 혁신저항을 증가시키고 있음을 나타내었다. 따라서 테크노스트레스가 생산성에 부정적으로 작용될 수 있기 때문에, 장기적이며 지속적인 경쟁력을 확보하기 위하여 새로운 정보통신기술의 도입을 준비하는 단계에서부터 조직 구성원들에 대한 체계적인 관리가 요구된다고 할 수 있겠다.

• 한국산학기술학회논문지
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• 제18권1호
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• pp.523-529
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• 2017

본 연구는 종합병원으로 운영되고 있는 지방공사의료원들과 민간 비영리법인 종합병원들 간의 자본과 인력의 활용도와 경영성과를 비교하여, 지방의료원들이 재정자립을 위한 효율적이고 합리적인 생산성 제고방안을 모색하고자 하는데 목적이 있다. 분석자료는 2011년부터 2014년까지의 지방공사의료원과 민간 비영리법인 종합병원의 투자효율 산출을 위한 세부계정과목이 구분된 결산자료로, 투자효율 및 경영성과 지표는 총자본 투자효율, 생산활동에 투자된 유형고정자산 투자효율, 인건비 투자효율, 부가가치생산성, 사업수익 이익률을 비교 분석하였다. 분석 결과, 투자효율인 총자본 투자효율, 생산활동에 투자된 유형고정자산 투자효율, 인건비 투자효율은 민간 비영리법인 종합병원이 지방공사의료원보다 유의하게 높았는데 특히 생산활동에 투자된 유형고정자산 투자효율의 차이가 매우 컸다. 그리고 경영성과에서는 지방공사의료원이 민간 비영리법인 종합병원에 비해 사업수익 부가가치율은 높은 반면에 사업수익 이익률은 유의하게 낮았다. 또한 투자효율과 부가가치생산성이 사업수익 이익률에 미치는 영향을 살펴본 결과, 지방공사의료원은 생산활동 유형고정자산 투자효율과 인건비 투자효율, 민간 비영리법인 종합병원은 인건비 투자효율이 유의하게 영향을 미쳤으며, 인건비 투자효율의 영향이 가장 컸다. 따라서 지방공사의료원들이 자립경영을 위한 생산성 제고방안으로 수익발생과 관련된 자산의 활용도, 그리고 인건비와 관련하여 인력의 활용도와 적정성에 대한 검토의 필요성이 제기된다.

• 산업경영시스템학회지
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• 제43권3호
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• pp.204-215
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• 2020

Efforts on the continued increase of local government's fiscal spending related to improving the residential environment are desirable to counter the declining phenomenon of urban decline. At the same time, however, it is also important to know how to operate limited finances more efficiently to improve the residential environment. This study aims to contribute to the rational allocation of fiscal expenditure and the creation of productive results for the improvement of the settlement environment. To this end, this study analyzed the efficiency of financial expenditure related to the improvement of the residential environment in 225 local governments nationwide. The relationship between financial expenditure and residential environmental performance was also measured and the CCR, BCC and SBM models were used to measure efficiency. The analysis showed that most local governments need to scale back their fiscal spending related to improving the government environment. In addition, it was required to prepare feasible spending plans by bench-marking the processes of residential environment improvement projects in areas such as Haman-gun, Jongno-gu, Seoul, and Seocho-gu, which are considered to be under efficient operation.

• The Journal of Asian Finance, Economics and Business
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• 제6권1호
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• pp.241-248
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• 2019

The purpose of this study is to investigate empirical evidences of productivity of life insurance institutions in Malaysia. Therefore, this study attempts to explore the productivity of the life insurance institutions in Malaysia. The overall findings show that the total factor productivity (TFP) has progressed by 2.5% per year during the study period from 2012 to 2016 in the Malaysian insurance industry. However, TFP change has declined from 2012 to 2015 and observed a negative growth in 2015-16 (3.3%). The highest productivity progress was documented during 2012-13 at a rate of 11.7% while the minimum productivity progress was during 2014-15 (only 0.2%). The results also indicate that the decomposition of TFP found that overall progress could mainly be attributed to technological change (TC). However, technical efficiency change (TEC) and pure technical efficiency change (PTE) have negative impact on TFP. The findings also show that most of the insurance companies have a steady growth. Therefore, this study will contribute new insights for the policy makers and insurance institutions to take appropriate steps in developing relevant policies for increasing productivity of insurance institutions in Malaysia.

• The Journal of Asian Finance, Economics and Business
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• 제8권4호
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• pp.673-685
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• 2021

This study aims to determine theoretically the best workers layoff/training strategy that entrepreneurs should apply to manage the COVID-19 crisis successfully. It also examines the impacts of the Saudi government's emergency measures on firm performance. The paper develops a theoretical framework in which the optimal control technics is applied to model the entrepreneur's hiring, layoff, and training behaviors. The results show that, during the current COVID-19 pandemic, the entrepreneur should first lay off the less productive workers to reduce labor costs. As more and more inefficient workers quit and profit increases, the entrepreneur starts expanding his activity and training workers. In the long run, only the training activity allows the firm efficiency to grow at a constant rate. This finding suggests that the key to long-run economic recovery in Saudi Arabia will rely on training, innovation, and adaptability to the new digital environment. The paper also shows that the Saudi government initiative of covering 60% of salaries for the small- and medium-sized entrepreneurs during the COVID-19 pandemic will enhance training activities in small- and medium-sized enterprises and improve their efficiency in both the short and long run. This policy will also prevent Saudi entrepreneurs from laying off half of their staff.

• The Journal of Asian Finance, Economics and Business
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• 제9권2호
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• pp.185-191
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• 2022

The purpose of this research is to see if liquidity, non-performing assets, sensitivity, and efficiency have an impact on the profitability and capital of Indonesian state-owned banks. A random sample of public banks was used in this study. The data was collected from the first quarter of 2014 to the fourth quarter of 2019. Purposive sampling was used as the sampling technique. According to the findings of this study, liquidity (LDR) had a significant positive effect on capital but had no significant effect on profitability. Productive asset quality as proxied by the ACA and NPL ratios did not affect profitability or capital. As for the sensitivity ratio, which was proxied by the ratio of NOP and IRR, there were differences in behavior. Sensitivity had no significant impact on profitability or capital, while NOP had a significant positive impact on capital but not on profitability. In terms of efficiency, both OER and FBIR had a significant effect on profitability and capital, although in different directions. OER has a significant negative impact on both profitability and capital. Fee-based income (FBIR) had a significant positive impact on capital, but it had the opposite effect on profitability.

• Current Photovoltaic Research
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• 제12권1호
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• pp.6-16
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• 2024

The efficiency of silicon solar cells is approaching a theoretical limit referred to as 'the state of the art'. Consequently, maintaining efficiency is more productive than pursuing improvements the last room for limiting efficiency. One of the primary considerations in silicon module conservation is the occurrence of failures and degradation. Degradation can be mitigated during the cell manufacturing stage, unlike physical and spontaneous failure. It is mostly because the chemical reaction is triggered by the carrier generation of thermal and light injection, an inherent aspect of the solar cell environment. Therefore, numerous researchers and cell manufacturers are engaged in implementing mitigation strategies based on the physical degradation mechanism.

• 한국산학기술학회논문지
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• 제11권6호
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• pp.2129-2137
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• 2010

본 연구는 경상남도 20개 보건소의 효율성을 평가하고, 비효율 보건소의 개선 목표치를 제시함으로써 효율성 제고에 실질적인 도움을 주고자 하였다. 효율성 평가방법으로는 자료포락분석(Data Envelopment Analysis: DEA)의 CCR, BCC 모형을 이용하여 보건소의 전체적 효율성과 사업 영역별 효율성을 평가하였다. 이를 위하여 투입변수로는 인력(의료직, 간호직, 보건직, 사무직)을 선정하였고 산출변수로는 보건소 사업(진료, 보건교육, 구강보건, 예방접종, 노인보건, 모자보건)을 선정하였다. 본 연구 결과는 기술효율성(TE) 평균은 0.868이었으며, 12개(60%) 보건소가 효율적으로 나타났다. 순수기술효율성(PTE)의 평균은 0.924이었으며, 14개(70%) 보건소가 효율적인 것으로 나타났다. 그리고 규모의 효율성(SE)의 평균은 0.933이었으며, 12개(60%)가 효율적인 것으로 나타났다. 위 연구결과를 토대로 보건사업의 체계적인 기획, 수행 및 평가를 통해 보건소가 효율적으로 운영되고 지역민에게는 최상의 의료서비스를 제공하기 위한 노력이 필요하다.

• 수산해양기술연구
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• 제53권4호
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• pp.357-362
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• 2017

The purpose of this study is to analyze the efficiency of distant-water longline fishing vessels in the Pacific Ocean and the gap in efficiencies among individual vessels. In order to estimate the efficiency, the dependent variable is set as an amount of catch and independent variables include number of crew, number of hooks, number of vessel size, and vessels engine power associated with fishing activities of distant water longline fisheries. Analytical result was shown as follows: first, the average efficiency of distant-water longline fishing vessels in the Pacific Ocean was found to be 94%. Second, the number of hooks were found to be statistically significant in each input variable and the appropriate control of the number of hooks would be expected to have a positive effect on the efficiency. Third, the relationship between the age of a vessel and the efficiency was not found statistically.