• 한국정보통신학회논문지
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• 제18권7호
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• pp.1734-1739
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• 2014

현재, 디지털 시대의 급속 발전과 함께 멀티미디어 관련 영상 장치들이 대중화 되고 있다. 그러나 영상 데이터를 처리하는 과정에서 임펄스 잡음에 의해 영상이 훼손되어 영상 인식이 어렵게 되며, 이러한 영상을 복원하기 위해 활발한 연구가 진행되고 있다. 본 논문에서는 임펄스 잡음환경에서 훼손된 영상을 복원하기 위해 훼손된 화소를 중심으로 방향성과 화소 사이의 공간적 거리에 따라 가중치를 적용하는 영상복원 필터 알고리즘을 제안하였다. 그리고 개선 효과의 객관적 판단 기준으로 PSNR(peak signal to noise ratio)을 사용하여 기존의 방법들과 비교하였다.

• 경영과정보연구
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• 제25권
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• pp.387-405
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• 2008

Vietnam is gaining much attention as an attractive emerging market that can replace BRICs for the corporations who are destined to always look for a new market in order to secure competitive powers in the global market. The reason for Vietnam's becoming an attractive place for production is that much uncertainty has been found in China, which has been the traditional country that absorbed the most amount of capital investment. Also, the favorable conditions of Vietnam market itself and the environmental changes such as the open-door policy of Vietnam government attract the investment of Korean companies, and Korea currently holds the most amount of cumulative investments in Vietnam. However, it is necessary to remember that Vietnam is still a socialist nation, and many required components for corporate activities are not sufficiently provided in Vietnam market. Also, many unstable environmental factors exist such as the lack of infrastructure, the lack of many required institutions, the prevalent corruption, the excessive processing time and cost for adjusting the investment, the lack of advanced work force, and the underdevelopment of part and material industry. Therefore, those companies who are planning to invest in Vietnam should take a long-term perspective in planning the investment strategies, carry out a detailed market investigation and analysis in advance, diversify the investment areas and investment sectors, carefully make a joint venture and management, carefully determine the factory location, establish a local agency, make co-investments with the part suppliers, etc.

• Journal of Communications and Networks
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• 제14권1호
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• pp.104-110
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• 2012

Group key agreement protocols allow a group of users, communicating over a public network, to establish a shared secret key to achieve a cryptographic goal. Protocols based on certificateless public key cryptography (CL-PKC) are preferred since CL-PKC does not need certificates to guarantee the authenticity of public keys and does not suffer from key escrow of identity-based cryptography. Most previous certificateless group key agreement protocols deploy signature schemes to achieve authentication and do not have constant rounds. No security model has been presented for group key agreement protocols based on CL-PKC. This paper presents a security model for a certificateless group key agreement protocol and proposes a constant-round group key agreement protocol based on CL-PKC. The proposed protocol does not involve any signature scheme, which increases the efficiency of the protocol. It is formally proven that the proposed protocol provides strong AKE-security and tolerates up to $n$-2 malicious insiders for weak MA-security. The protocol also resists key control attack under a weak corruption model.

• Journal of Electrical Engineering and Technology
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• 제13권3호
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• pp.1383-1391
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• 2018

A new nonlinear filtering algorithm for effectively denoising images corrupted by the random-valued impulse noise, called dual sliding statistics switching median (DSSSM) filter is presented in this paper. The proposed DSSSM filter is made up of two subunits; i.e. Impulse noise detection and noise filtering. Initially, the impulse noise detection stage of DSSSM algorithm begins by processing the statistics of a localized detection window in sorted order and non-sorted order, simultaneously. Next, the median of absolute difference (MAD) obtained from both sorted statistics and non-sorted statistics will be further processed in order to classify any possible noise pixels. Subsequently, the filtering stage will replace the detected noise pixels with the estimated median value of the surrounding pixels. In addition, fuzzy based local information is used in the filtering stage to help the filter preserves the edges and details. Extensive simulations results conducted on gray scale images indicate that the DSSSM filter performs significantly better than a number of well-known impulse noise filters existing in literature in terms of noise suppression and detail preservation; with as much as 30% impulse noise corruption rate. Finally, this DSSSM filter is algorithmically simple and suitable to be implemented for electronic imaging products.

• 한국IT서비스학회지
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• 제14권4호
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• pp.45-60
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• 2015

Governments around the world invest in research and development (R&D) for different purposes : national economy, defence, environment, health, etc. as a means of national survival beyond the means of national competitiveness. These are usually programs with high social impact but low short-term economic impact or large scientific programs that are too expensive and risky for private sector investment alone. The Republic of Korea has also shown a very successful model of economic progress and social development through government R&D programs. However, there have been many corruption scandals behind it while selecting awardees for government R&D programs in Korea. So, the Republic of Korea focused on reforming appraisal system for government R&D and began preparation for "Clean Appraisal System" last year. In this study, first we analyzed the related appraisal tasks through the review of laws and administrative rules and typed appraisal tasks according to the flow of the actors and time. Thus securing the information infrastructure and finally we drew the conceptual model of the system according to an open appraisal tasks by introducing an element of the OECD on open government typed appraisal tasks.

• The Journal of Asian Finance, Economics and Business
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• 제8권5호
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• pp.795-806
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• 2021

This study analyzes and assesses the effect of good governance consisting of accountability, transparency, and participation on the financial performance of Pare-Pare City local government moderated by the basic values of Siri culture in the form of Lempu (honesty), Amaccangeng (intelligence), and Awaraningeng (courage). The population of this research is 200 local government employees (respondents). The results of data analysis showed that accountability and participation variables had no significant effect on the financial performance of the Pare-Pare City local government. However, the transparency variable has an influence on local government financial performance. It is hoped that all these 3 variables (accountability, transparency, and participation) will have a significant effect on local government financial performance. To achieve this, it is necessary to apply cultural values that exist in society so that cultural values can provide greater guidance in the management of regional finances. The results provide a better understanding of the importance of Siri's cultural value in the implementation of public services to the community. With Siri's cultural values in the form of Lempu, Amaccangeng, and Awaraningeng embedded in their behavior, government employees can improve performance and avoid deviant behavior or corruption. The novelty of this research is a form of analysis by using local cultural values (the basic values of Siri culture) as the moderating variable.

• 국제지역연구
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• 제22권1호
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• pp.61-78
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• 2018

해외직접투자에서 자회사 운영방식은 크게 수평적 자회사와 수직적 자회사로 구분할 수 있다. 이와 같은 자회사의 운영방식은 진출국의 제도에 따라 차이를 보인다. 본 연구는 제도이론관점에서 국내 전기전자 및 자동차산업의 해외직접투자 기업을 대상으로 진출국 공식적, 비공식적 제도가 해외 자회사 운영 방식선택에 미치는 영향을 실증 분석하였다. 실증분석결과, 진출국 정치적 위험정도가 낮을수록, 문화적 차이가 클수록 수직적 자회사를 선택하는 것으로 나타났다. 반면에 진출국 부패지수가 낮을수록, 경제자유도가 높을수록 수평적 자회사를 선택하는 것으로 나타났다.

• 융합경영연구
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• 제10권6호
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• pp.39-46
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• 2022

Purpose: The purpose of this study is to look at the current status and cases of ESG at home and abroad, and through this, seek ways to activate the ESG strategy of domestic SMEs and suggest a direction. Research design, data and methodology: This study examines the current status of ESG management at home and abroad and examples of companies through related literature on ESG management and performance. Through this, the strategic direction of ESG management of domestic SMEs was presented. Results: Compared to the government and major corporations, SMEs can be said to lack ESG management activities. ESG activities include environmental activities such as carbon neutrality, waste management, eco-friendly supply chain management, establishment of safety and health processes to improve workers' environment, expansion of governance to guarantee autonomy and profitability such as fair trade, protection of social and shareholder rights such as anti-corruption, etc. should be based on Therefore, there are difficulties in ESG activities of SMEs that lack funds and manpower. Conclusions: Compared to the government and major corporations, SMEs can be said to lack ESG management activities However, it will be possible to establish and implement ESG management strategies based on the strengths of SMEs and the characteristics of each company.

• The Journal of Asian Finance, Economics and Business
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• 제8권4호
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• pp.21-32
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• 2021

This paper aims to investigate the relationship between country-level institutional quality and public debt in the context of Pakistan. The hypotheses of this study were assessed by using the country-level institutional quality data for Pakistan throughout the years from 1996 to 2018. Data came from the World Databank, IMF and Worldwide Governance Indicators databases. For the analysis, ordinary least square, quantile regression and robust regression were employed to assess the factors influencing the public debt. The results of this study indicate that the factors of voice and accountability, regulatory quality, and control of corruption have a positive and significant relationship with public debt, while political stability, government effectiveness, and the rule of law have a negative and significant effect on public debt. Based on the findings, a weak country-level institutional quality poses a substantial market risk as it signals the existence of an unfavorable economic condition that raises public debt. It was also revealed that an improved performance of country-level institutional quality can lead to the improvement of financial market transparency, hence reduce public debt. In contrast to previous studies, the present study will be breaking ground in enhancing public insight regarding the impact of country-level institutional quality on Pakistan's public debt.

• 영어영문학
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• 제58권2호
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• pp.327-345
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• 2012

This paper explores how gender, sexuality, momism and national security are intertwined in the POW fictions of the Korean War, revealing the blurred demarcation line of the private and the public during the Cold War era. Works such as Night and Valley of Fire reveal the weakened manhood of the soldiers who were brainwashed or easily succumbed to the enemy during their imprisonment. The novels commonly attribute their weakness to materialism and spiritual corruption prevalent in the society, in addition to mass media including TV. Moreover, a social critic like Phillip Wily provokes the polemical idea of "Momism" which was ardently circulated among some male circles. In Manchurian Candidate, momism is integrated into incest and homosexuality, epitomized by Raymond and his mother. The novel illustrates how momism can be dangerous to national security and devastate the growth of manhood. Mrs. Iselin, a masculinized middle-aged woman, becomes a 'monster' whose overweening desire for power overrides any maternal concern for her son. Such 'monstrosity' exposes the danger of a woman who can castrate a man and manipulate a society. To a certain extent, the same tendency can be found in Turncoat and Night. Both novels reveal how the love of mother brings detrimental impact on boys who become prey to the communist's brainwashing in the POW camps. In short, the POW novels betray society's patriarchal concerns with women's emerging power threatening its ideology.