• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.21 no.6
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• pp.163-171
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• 2021

In this paper, the energy transaction system was optimized by applying a resource allocation algorithm and deep reinforcement learning in the distributed power system. The power demand and supply environment were predicted by deep reinforcement learning. We propose a system that pursues common interests in power trading and increases the efficiency of long-term power transactions in the paradigm shift from conventional centralized to distributed power systems in the power trading system. For a realistic energy simulation model and environment, we construct the energy market by learning weather and monthly patterns adding Gaussian noise. In simulation results, we confirm that the proposed power trading systems are cooperative with each other, seek common interests, and increase profits in the prolonged energy transaction.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.9 no.5
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• pp.1479-1486
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• 2008

Recently, the number of applicants for the engineering college is gradually decreased all over the nation. Additionally, the concerns of fall of freshman mathematical ability are raised due to the incomplete high school education. Therefore, the local universities endeavor in order to improve the quality of mathematics education, and study the countermeasure against the crisis. As part of these efforts, Sang-Myung University founds the innovation center for engineering education. The center derives several ideas in order to enhance the mathematics education quality. In this paper, the enhancement plans for the mathematics education in Sang-Myung University are proposed. Results in this paper will be helpful for other university to enhance the mathematics education as reference materials.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.37 no.5A
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• pp.388-394
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• 2012

In this paper, the influence analysis of food on human body organs is proposed by applying speech signal processing techniques. Until these days, most of researches regarding the influence of food on body organs are such that "A" ingredient of food may produce a good effect on "B" organ. However, the numerical and quantified researches regarding these effects hardly have been performed. This paper therefore proposes a method to quantify the effects by using numerical data, so as to retrieve new facts and informations. Especially, this paper investigates the effect of tomatoes on human heart function. The experiment collects samples of voice signals, before and after 5 minutes, 30 minutes and 1 hour, from 15 males in their 20s who have not abnormal heart function; the voice signal components are applied to measure changes of heart conditions to digitize and quantify the effects of tomatoes on cardiac function.

• The Journal of the Korea Contents Association
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• v.19 no.1
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• pp.587-597
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• 2019

With the rapid aging of the nation's population and the increasing number of elderly people with difficulties in daily life, the elderly care system was implemented for social solidarity. Structural problems in the long-term care system that emerged after the introduction of the system are demanded, and the problem of functional readjustment between nursing hospitals and facilities is raised due to the lack of continuity of care for the elderly by institutional and salary types. In this study, we set up research problems related to personnel, staff, and services to address the problem and conducted FGI. Research has shown that the number of elderly and recognized people in the region, the number of elderly and elderly patients, needs to be reflected in long-term care demand, the direction of appropriate institutional and manpower supply policies, and the establishment of local government goals and plans to strengthen the long-care institutions. It was revealed that non-medical accident arbitration bodies are needed to apply the cost of food insurance, provide programs through links with relevant institutions, and manage the admission smoothly.

• The Journal of the Korea Contents Association
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• v.22 no.2
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• pp.270-280
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• 2022

There has been a stream of literature studying moderators of the relationship between organizational ambidexterity and firm performance, but there remains a lack of research on moderators with a strategic perspective. We examined the effect of organizational ambidexterity on a firm's long-term performance and the moderating effect of a firm's relative exploration and exploitation based on a sample of 8,916 firms. We found a positive relationship between organizational ambidexterity and long-term performance measured by Tobin's q. The results also suggest that a firm's relative exploration positively moderates the relationship between organizational ambidexterity and long-term performance, whereas exploitation negatively moderates this relationship. We contribute to the current ambidexterity literature by integrating it with strategy literature. We found that the positive relationship between organizational ambidexterity and long-term performance is enlarged and long-lasting when a firm is a differentiator. In contrast, this positive relationship is lessened and short-lasting when a firm is a cost-leader.

• Sleep Medicine and Psychophysiology
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• v.7 no.1
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• pp.10-17
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• 2000

To investigate the neurobiological bases of learning and memory is one of the ambitious goals of modern neuroscience. The progress in this field of recent years has not only brought us closer to understanding the molecular mechanism underlying long-lasting changes in synaptic strength, but it has also provided further evidence that these mechanisms are required for memory formation. Since twenty years ago, several studies for the tests of the hypothesis that NMDA-dependent hippocampal long-term potentiation(LTP) underlies learning have been reported. Also, in the recent year, data from mutant mice showed that a potential role for NMDA-dependent LTP in hippocampal CA1 and spatial learning. Although the current evidence for the role of NMDA receptor in learning and memory is not still obvious, NMDA receptor seems to act as a critical switch for activation of a cascade of events that underlie synaptic plasticity.

• Journal of Digital Convergence
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• v.11 no.10
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• pp.287-294
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• 2013

This study were proposed for the promotion policy on public confidence in nuclear power recovery schemes. To this end, the existing survey and secondary data review and public distrust of nuclear power plant safety issues were raised. In addition, the meta-analysis data were analyzed by using. Promote public confidence in nuclear power plants recovered three major policy presented. First, the nuclear power plant for the economical / safety communication strategy, short term / long term in terms proposed. Second, strengthen the nuclear power plant reliability and short-term communication strategy / long term in terms proposed. Finally, Korea Hydro & Nuclear Power's long-term image building measures proposed. The results of this study Korea's nuclear power plants to increase confidence in the effect is expected to be presented.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.9
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• pp.584-595
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• 2020

This study relates to the effect from enforcement of regulations in 2014 against controlling shareholder expropriation in Korean corporations. The relationship change between related party transactions (RPTs) and the corporate values of listed Korean corporations is analyzed for the five-year period before and after enforcement of the regulations (2009-2013 and 2014-2018). Three types of RPTs regarding long-term supply contracts, loans, and credit were adopted for analysis. Following are the results of a regression analysis with panel data that consist of 6,534 firm-year observations. First shown is that the enforcement of regulations affects the relationship between RPTs and corporate value. Specifically, for all corporations, the result implies that the purpose of expropriation is weakened, and the efficiency and transparency of transactions in corporations are enhanced due to enforcement of the regulations. Secondly, the extent to which the regulations exert influence on designated and non-designated corporations differs. Regulation enforcement seems to be more influential on non-designated corporations than on designated ones for the efficiency and transparency of transactions in the long-term contract type of RPT.

• 한국노년학
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• v.32 no.2
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• pp.593-609
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• 2012

The study was performed to identify the functional status change of beneficiaries of Long-Term Care Insurance and its related factors. We conducted the logistic regression with 17,652 beneficiaries during August and September in 2008. As a result, activities of daily living(ADL), behavioral changes, rehab, instrumental activities of daily living(IADL) and cognitive function, followed by nursing care area were improved in a greater degree. For the institutional service, level-1 beneficiaries was significantly improved in rehab area and level-2 beneficiaries was improved in ADL. For the home-visit care service of in-home services, level-1 beneficiaries was improved in ADL, level-2 beneficiaries was improved in ADL and rehab area, level-3 beneficiaries was improved in ADL, cognitive function and behavioral changes. For the day-and-night care service, level-1 beneficiaries was improved in ADL, IADL, behavioral changes and rehab area, level-2 beneficiaries was improved in behavioral changes, level-3 beneficiaries was improved in cognitive function and behavioral changes. For the short-stay service, level-3 beneficiaries was improved in behavioral changes. By the above results, there was a difference in a functional improvement by level and used services. Therefore, government need to provide the personalized service system based on the objective and comprehensive understanding for health and functional status of beneficiaries.

• 한국노년학
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• v.31 no.1
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• pp.97-109
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• 2011

The purpose of this work is to examine how work stressors are related to the burnout among staff in long-term care facilities for the elderly. This study offers some responses to a growing stress and burnout for the long-term care workers. The demand for long-term care workers is set to rise in light of an increasing share of older people and dependent elderly. Long-term care workers provide long-term care services to persons with a reduced degree of functional, physical or cognitive capacity. Cross-sectional survey data were collected from 216 staff in long-term care facilities. The standardised Maslach Burnout Inventory(MBI) was used to assess levels of burnout in long-term care workers. The MBI consists of 22 items using a 5-point Likert scale, measuring three sub-scales of burnout; Emotional exhaustion, Depersonalization, and Personal accomplishment. Data were analyzed using regression. This study is empirically tested the degree of association between burnout and its antecedents. The majority of differences in burnout could be explained by work stressors such as client relationship, job overload, job role conflict, and conflicts with clients' family. The study also identified workers' perceptions of their image in society and emotional support as predictors of burnout. Therefore long-term care facilities are encouraged to review their practices so that workers well-being is supported. The study findings suggest attention for organizational oriented initiatives to cope with burnout.