• Journal of KIBIM
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• v.5 no.4
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• pp.11-22
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• 2015

Government efforts for green growth policy initiatives demand low-carbon technologies in the road construction industry. The purpose of this paper is to develop an algorithm of a road alignment design solution for establishing the multi-dimensional information, and to calculate carbon emission quantity due to the geometric design elements in the planning phase of road alignment. The paper developed a calculation method for carbon emission quantity by drawing a speed profile reflected in the operating speed, acceleration and deceleration, which are majors factor of carbon emissions while driving and by applying a carbon emission factor. From this effort, it enabled alignment planning to reduce carbon emission. Object-based parametric design methods of the cross-sections were proposed for alignment planning, and the paper demonstrated a BIM-based road alignment planning solution. The proposed solutions can provide multi-dimensional information on carbon emission quantity and cross section elements through driving simulation. It is expected to allow construction of eco-friendly roads by deriving optimal road alignment to minimize environmental costs.

• Journal of the Korean Solar Energy Society
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• v.40 no.3
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• pp.1-20
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• 2020

In accordance with the Government's policy, renewable power generation is expanding very largely. This leads to increasing uncertainty in the power market and power system owing to the intermittent and fluctuating output characteristics of renewable power generators. Data on the acquisition of renewable power generators can be largely classified according to the operation of the power market and power system. Data on the settlement for the payment for the power amount are acquired in the power market, and real-time data for monitoring the status and output of the generators are acquired in the power system. However, renewable power generators operating in the power market have different acquisition cycles depending on the method of communication of the power meter. They acquire data only for settlement purposes and have no real-time data, which requires improvement. In this paper, the acquisition status is reviewed by classifying the data of renewable power generators into settlement and real-time data. In addition, measures and acquisition criteria for real-time data of renewable power generators for improving the acquisition method are proposed.

• Journal of Soil and Groundwater Environment
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• v.22 no.4
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• pp.49-59
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• 2017

This study estimated the nitrogen budget, including gaseous nitrogen oxides ($NO_x$), of South Korea in 2012~2014. The nitrogen budget was classified into three categories: agricultural and livestock, forest, and city. To estimate the nitrogen budget, several input and output parameters were investigated, including deposition, fixation, irrigation, chemical fertilizer use, compost, fuel, denitrification, volatilization, runoff, crop uptake, leaching, and $NO_x$ emissions. The annual nitrogen inputs from 2012 to 2014 were 6,202,828, 6,137,708, and 6,022,379 ton/yr, respectively. The corresponding annual nitrogen outputs were 1,393,763, 1,380,406, and 1,360,819 ton/yr, respectively, signifying a slight decrease from 2012 to 2014. $NO_x$ was the parameter contributing to the nitrogen budget to the greatest extent. The annual ratios of $NO_x$ emissions by vehicles, power plants, and businesses were 0.31, 0.31, and 0.30 in 2012, 2013, and 2014, respectively. A change in government policy that prohibited the disposal of livestock manure and sewage sludge in the ocean from 2012 affected nitrogen budget profile. As a result, the ocean disposal ratio completely diminished, which differs from previous studies.

• Journal of Integrative Natural Science
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• v.14 no.3
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• pp.107-115
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• 2021

The demand for traceability of meat and livestock supply chains is growing due to the high-profile incidents of hormonal contamination. E. coli, dioxin, BSE, and antibiotics have been recorded. In this paper, we present blockchain-based poultry information management system design and implementation using Hyperledger Fabric. The proposed system offers accurate, decentralized, immutable and consensus process that promote trust and transparency between stakeholders. The main tasks of the system include the recording of the information associated with poultry rearing (from a hatchery to a farm), status report of the farm activities on a monthly basis. The system can track movement of docks through the supply chain until delivery to the final consumer through the retail outlet. The ability to trace the source of livestock product through all the stages of rearing/production, processing and distribution is essential for ensuring food safety as recall of contaminated product can easily be done thereby increasing consumer confidence.

• The Mathematical Education
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• v.57 no.4
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• pp.393-412
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• 2018

Teacher quality is a key factor that determines quality of education. Being aware of this, the Korean government and teachers have been striving to improve teachers' professionalism. Research about the impacts of efforts to enhance teacher professionalism on students' academic achievement and course satisfaction, however, is extremely limited. This study sought to advance our understanding of the relationship between these factors by analyzing what teacher characteristics impact students' achievement and satisfaction. To this end, the study drew on the middle and high school data from 3rd to 6th year survey of the Seoul Educational Longitudinal Study. Structural equational modeling were used as the main approach. Latent profile analysis, a kind of mixture modeling analysis, were used as needed. This study found that teachers' participation in instruction enhancement activity and professional development impact students' attitude toward mathematics lessons and their perception on class atmosphere, and ultimately impact their academic achievement as well as their overall satisfaction in the course. In addition, teachers' use of EBS textbooks and videos impact 3rd grade high schoolers' academic achievement. These findings suggest that effort to improve teacher professionalism positively impact students' academic achievement and course satisfaction, although there is a difference according to the year grade. This study provides implications for education policy makers and teacher educators.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.16 no.3
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• pp.65-76
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• 2006

This paper deals with an effective algerian aimed at improving the port scan detection in an intrusion detection system (IDS). In particular, a detection correlation algerian is proposed to maximize the detection capability in the network-based IDS whereby the 'misuse' is flagged for analysis to establish intrusion profile in relation to the overall port scan detection process. In addition, we establish an appropriate system maintenance policy for port scan detection as preprocessor for improved port scan in IDS, thereby achieving minimum false positive in the misuse detection engine while enhancing the system performance.

• The Journal of Industrial Distribution & Business
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• v.14 no.1
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• pp.39-47
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• 2023

Purpose: This research aims at determining institutional commitment impact and how it influences job satisfaction. It aims at bridging the gap in research on the study topic. Its major focus is on work content and institutional commitment as the main variables and how they impact companies and employees. Research design, data and methodology: The current research has chosen the literature content approach and it is a reporting guideline for methodical assessments. It offers a consistent approach for conducting and reporting these types of studies, which can help to improve the quality and transparency. Results: The finding of the current research has showed that workers in social companies need jobs with higher values and responsibilities, company policy, among other factors. Workers' organization commitment towards social enterprise for improving workers' job satisfaction factors will include affective commitment, continuous commitment, normative commitment, and the commitment profile of the organization. Conclusions: This research finally insists that the findings of the current research would aid in enhancing employee knowledge and understanding of work satisfaction, as well as the essence of institutional commitment. Most employees lack adequate knowledge of the implications of job satisfaction not forgetting their personal needs as indicated in the individual need model.

• Journal of Digital Convergence
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• v.12 no.9
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• pp.225-235
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• 2014

The purpose of this study is to examine the association between regular exercise habit, self-rated health status, health practice index, and health promotion lifestyle profile among 241 college male students from Gyeonggi-do. Subjects were divided into two groups: students majoring in physical education(PE) and students who are not majoring in PE. The average BMI were $22.77{\pm}2.74$ among PE majors and $21.57{\pm}4.30$ among the other group. PE majors showed higher results in all of physiological, subjective and social health conditions. Both groups showed low scores in health practice index, which were $2.86{\pm}1.10$ among PE majors and $2.97{\pm}1.46$ among non-PE majors, showing no difference in statistical significance. Index for health promoting lifestyle practices were somewhat higher among PE majors; however, there were no statistical significance with the results of $123.38{\pm}19.93$ among PE majors and $119.98{\pm}22.04$ among non-PE majors. The analysis on the index for health promoting lifestyle practices in sub-categories showed that PE majors showed significantly higher scores compared with non-PE majors in physical activities area and vice versa in nutrition area.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.16 no.2
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• pp.81-89
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• 2002

The Battery Energy Storage System (BESS) has lots of advantages such as load leveling, quick response emergency power (spinning reserve), frequency and voltage control, improvement of reliability, and deferred generation and transmission construction. However, it is very critical that economic feasibility requires justification from the customer side of meter to promoting the dissemination of BESS in nation widely. In this paper, we proposed the economic assessment model of customer owned BESS which is complemented and improved the existing model. The proposed model is applied to the typical customer types, i.e. light industrial, commercial, and residential, which are taken from the statistical analysis on the load profile survey of Korea Electric Power COmpany (KEPCO). The economic viability performed for each customer load type to justifying their economic feasibility of BESS installation from the economic measures such as payback period, Net Present Worth (NPW), Rate Of Return (ROR). The results show that the BESS has economic benefits to the specific customer type, i.e. residential customer. Therefore, the government and the energy agency should be committing the support program, such as tax incentive, financial support, to disseminate the BESS nation widely. The results of this paper are useful to the customer investment decision-making and the national energy policy & strategy in Korea.

• Korean Journal of Biological Psychiatry
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• v.15 no.1
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• pp.23-28
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• 2008

Objectives : The treatment of alcohol dependence requires maintaining abstinence. However, some previous studies have suggested that the abstinence may increase the cardiovascular risk in patients with alcohol dependence. The aim of the present study was to examine the effect of alcohol abstinence on lipid profile in Korean male patients with alcohol dependence. Methods : Twenty-eight male patients with alcohol dependence were recruited from a psychiatric unit located at Gangneung Dongin Hospital. Lipid profiles of the patients were compared before and after a month of alcohol abstinence. Results : After abstinence of 1 month, high-density lipoprotein(HDL) cholesterol and triglyceride(TG) level was significantly decreased(p=0.000; p=0.0086, respectively). Low-density lipoprotein(LDL) cholesterol level showed a tendency to increase(p=0.066). Total cholesterol level also showed a tendency to decrease(p=0.074). Conclusions : These results show that acute abstinence of alcohol might paradoxically aggravate dyslipidemia in patients with alcohol dependence. Thus, this study shows that more concern associated with cardiovascular risk is needed during short-term abstinence period.