• Journal of Information Technology Services
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• v.13 no.4
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• pp.275-287
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• 2014

Recently, the volume of unstructured text data generated by various social media has been increasing rapidly; consequently, the use of text mining to support decision-making has also been growing. In particular, academia and industry are paying significant attention to topic analysis in order to discover the main issues from a large volume of text documents. Topic analysis can be regarded as static analysis because it analyzes a snapshot of the distribution of various issues. In contrast, some recent studies have attempted to perform dynamic issue tracking, which analyzes and traces issue trends during a predefined period. However, most traditional issue tracking methods have a common limitation : when a new period is included, topic analysis must be repeated for all the documents of the entire period, rather than being conducted only on the new documents of the added period. Additionally, traditional issue tracking methods do not concentrate on the transition of individuals' interests from certain issues to others, although the methods can illustrate macro-level issue trends. In this paper, we propose an individual interests tracking methodology to overcome the two limitations of traditional issue tracking methods. Our main goal is not to track macro-level issue trends but to analyze trends of individual interests flow. Further, our methodology has extensible characteristics because it analyzes only newly added documents when the period of analysis is extended. In this paper, we also analyze the results of applying our methodology to news articles and their access logs.

• International Journal of Contents
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• v.17 no.4
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• pp.52-61
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• 2021

The 2020 US Presidential Election was a highly-anticipated moment for our global society. During the election period, the most intriguing issue was who would be the winner-Trump or Biden? Among the possible main themes of the 2020 election, from the COVID-19 pandemic to racism, this study focused on feminism ('women') as a main component of Biden's victory. To explore the character of Biden's supporters, this paper focused on internet spaces as a source of public opinion. To guide the data analysis, this study employed four indices from empirical studies on Big Data analytics: issue salience, attention diversity, emotional mentioning, and semantic cohesion. The main finding of this study was that the representative keyword 'women' appeared more prevalently within content related to Biden than Trump, and the keyword pairs indicated that female voters were the main reason for Trump's failure but the root cause of Biden's victory. The results of this study indicated the role of the internet as a forum for public opinion and a fountain of political knowledge, which requires more rigorous investigation by researchers.

• Proceedings of the Korean Nuclear Society Conference
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• 2005.10a
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• pp.416-417
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• 2005

• The Journal of Sustainable Design and Educational Environment Research
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• v.16 no.2
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• pp.1-9
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• 2017

Defect dispute in apartment building has become a debating social issue. The system of defect lawsuit and the conciliation process are applicable to solve defect problems in South Korea. Among various defects, painting work defect is a critical issue because it requires large area works and entails a lot of cost. Accordingly, disputes on work procedure and cost calculation are argued oftenly between residents and housing providers. This study reviewed detailed main issues of painting work and propose relevant systems and standards. In this analysis, the main issues are categorized into pre-works, main work, and others. The most recent cases are compared and analyzed for each issue. After the analysis, following conclusions are obtained, (1) In defect lawsuit system, even though surface treatment work in pre-work step is part of main work, it has been separated and regarded as a separate work. (2) Although the main painting work are not significantly different from two systems, it is still necessary to achieve a consensus to close the gap in the methodology of painting area calculation and determining whole painting or partial painting. (3) In addition, unlike the profit rate of general construction works, that of painting work remained the maximum rate and additional charge rate for works carried out in higher place are different among cases. Therefore, it is determined that establishing consistent standards is urgent.

• International Journal of Computer Science & Network Security
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• v.21 no.3
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• pp.48-54
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• 2021

Security is an important issue for wireless communications and poses many challenges. Most security schemes have been applied to the upper layers of communications networks. Since in a typical wireless communication, transmission of data is over the air, third party receiver(s) may have easy access to the transmitted data. This work examines a new security technique at the physical layer for the sake of enhancing the protection of wireless communications against eavesdroppers. We examine the issue of secret communication through Rayleigh fading channel in the presence of an eavesdropper in which the transmitter knows the channel state information of both the main and eavesdropper channel. Then, we analyze the capacity of the main channel and eavesdropper channel we also analyze for the symbol error rate of the main channel, and the outage probability is obtained for the main transmission. This work elucidate that the proposed security technique can safely complement other Security approaches implemented in the upper layers of the communication network. Lastly, we implement the results in Mat lab

• Journal of Korean Society of Industrial and Systems Engineering
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• v.4 no.4
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• pp.35-42
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• 1981

This paper grasped the labor productivity actual condition by the standard of per unit working hour and production about the main products of our country's industrial the main materials and could understand the average of our country's labor productivity as compared this with the labor productivity actual condition of Japan. As the point at issue of analitical result. 1. Low a matter of thinking about productivity. 2. Have a lot of difficult problem in an industrial part. 3. Have the point at issue on technical development and accumulation. 4. Have the point at issue on management. As a countermeasure about these. 1. must convert the way of use of industrial policy. 2. must make a housing development and special serialization of a small and medium enterprise. 3. must establish an organic technical development system. 4. must grope the policy of management rationalization.

• Health Policy and Management
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• v.28 no.3
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• pp.195-196
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• 2018

The Korean Academy of Health Policy and Management (KAHPM) has shown remarkable achievements in the field of health policy and management in Korea for the last 30 years. The KAHPM consists of experts in various fields of health policy and management, and has been the leading academic discussion forum for health policy agendas of interest to the public. Health Policy and Management (HPM), the official journal of the KAHPM, published the first issue of volume 1 in October, 1991 and is publishing the second issue of volume 28 as of 2018. Currently, it is one of Korea' main journals in the field of health policy and management. HPM has published a special issue in commemoration of the 30th anniversary of the KAHPM. The HPM invited authors, including former presidents of the KAHPM and current board members, to write about main issues in health policy and management. Although the HPM tried to set up an invited author on all subjects in the health policy and management field, 19 papers are published, that completed the peer review process by August, 2018. The authors of the special issue of the 30th anniversary of the KAHPM include six former presidents, a senior professor, and 12 board members. The subjects of this issue are reform of the healthcare delivery system, health insurance and medical policy, reform of health system governance, the role of National Health Insurance Service (NHIS), the Korea Institute for Health and Social Affairs (KIHASA) and the National Evidence-based healthcare Collaborating Agency (NECA), ethical aspects of health policy change, regional disparities of healthcare, healthcare accreditation, new healthcare technology evaluation system, globalization of the healthcare industry, the epidemiological investigator system, the quarantine system, safety and disaster, and official development assistance. There are some remaining topics to deal with for the KAHPM: aged society, anti-smoking, non-infectious disease, suicide, healthcare resources, emergency medical care, out-of-pocket money, medical fee payment system, medical aid system, long-term care insurance, industrial accident compensation insurance, community-centered health welfare system, and central government and local government of health. The HPM will continue to publish review articles on the main topics in health policy and management. This is because the KAHPM, which has been the leading academic society of Korea's health policy and management for the last 30 years, feels responsible for continuing its mission for the next 30 years.

• Journal of Environmental Science International
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• v.24 no.9
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• pp.1211-1220
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• 2015

Soil is the most important factor in natural environment for bio-diversity. Urbanization and development of city devastate urban soil by the fraternization of green network and run off pollution. In these facts, preservation of soil is the main issue in maintain of quality urban environment. In order to handle this issue, the gold network that link fragment soil patches is considered in maintain quality soil. This study researched the infiltration Treebox design technique based on the Low Impact Development. This technique suggest reduction of impervious area of the soil due to urbanization. The main concept of this study is encourage more permeable surfaces in urban area by using a infiltration planter. The function of the planter is hold run off as much as possible from intensive rainfall, and utilizes it in drought season. Also, this planter provides fertile soil for organism habitat by keeping appropriate moisture supplying.

• International journal of advanced smart convergence
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• v.9 no.2
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• pp.157-163
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• 2020

Recently the blockchain technology has been actively studied due to its great potentiality. The smart contract is a key mechanism of the blockchain system. Due to the short history of the smart contract, many issues have not been solved yet. One main issue is vulnerability and another main issue is cost optimization. While the vulnerability of smart contract has been actively studied, the cost optimization has been rarely studied. In this paper, we propose two cost optimization methods for smart contracts running on the blockchain system. Triggering a function in a smart contract program code may require costs and it is repeated continuously. So the minimization of costs required to trigger a function of smart contract while maintaining the performance equally is very important. The proposed two methods minimize the usage of expensive permanent variables deployed on the blockchain system. We apply the proposed two methods to three prevalent blockchain platforms: Ethereum, Klaytn and Tron. Evaluation experiments verify that the proposed scheme significantly reduces the costs of functions in the smart contract written with Solidity.

• Journal of Korea Trade
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• v.25 no.7
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• pp.108-121
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• 2021

Purpose - This paper studies whether the CISG is applicable to the arbitration agreement when the validity of the arbitration agreement becomes an issue. To make the study clear, it limits the cases assuming that the governing law of the main contract is the CISG and the arbitration agreement is inserted in the main contract as a clause. Also, this paper discusses only substantive and formal validity of the arbitration agreement because the CISG does not cover the questions of the parties' capacity and arbitrability of the dispute. Design/methodology - This paper is based on scholarly writings and cases focusing on the principle of party autonomy, formation of contract and the doctrine of separability to discuss characteristic of arbitration agreement. In analyzing the cases, it concentrates on the facts and reasonings that show how the relative regulations and rules are interpreted and applied. Findings - The findings of this paper are; regarding substantive validity of arbitration agreement, the courts and arbitral tribunals consider general principles of law for the contract and the governing law for the main contract. In relation to formal validity of arbitration agreement, the law at the seat of arbitration or the law of the enforcing country are considered as the governing law in preference to the CISG because of the recognition and enforcement issues. Originality/value - This paper attempts to find the correlation between the CISG and the arbitration agreement. It studies scholars' writing and cases which have meaningful implication on this issue. By doing so, it can provide contracting parties and practitioners with some practical guidelines about the governing law for the arbitration agreement. Furthermore, it can help them to reduce unpredictability that they may confront regarding this issue in the future.