• The Korean Journal of Applied Statistics
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• v.17 no.2
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• pp.239-252
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• 2004

It is known that the domestic and the U.S. stock prices tend to move together as those markets are closely interrelated. In this study, cointegration and causal relationships among the four stock price indexes of KOSPI, KOSDAQ, DOWJONES and NASDAQ are carefully investigated for the period of declining stock prices in the long run. When all indexes move in a similar fashion, cointegration does not exist and the causal linkages between the domestic and the U.S. stock prices appear relatively complex. On the other hand, when the domestic and the V.S. stock prices move in a different manner, cointegration exists and the causal relationships appear relatively simple. NASDAQ is apparently found to lead the domestic stock market in both periods, which is consistent with the actual market situation when the If industry is under recession.

• Proceedings of the Korean Information Science Society Conference
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• 2000.04a
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• pp.148-150
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• 2000

자원 예약을 보장하지 못하는 네트워크 상에서 실시간 멀티미디어 응용의 만족스러운 서비스를 위해서는 효과적인 종단 시스템의 운영이 필요하다. 이러한 운영 기술 중 버퍼를 이용한 응용 프로그램 수준의 대역폭 평활화 기술과 태스크 스케줄링 기법은 핵심적인 부분을 차지한다. 기존에 제안된 온라인 대역폭 평활화 기법은 동적 슬라이딩 윈도우와 공적 버퍼를 이용하여 네트워크에 적응할 뿐만 아니라 요구 대역폭 평활화를 통해 지터를 흡수, 완충시킴으로써 더 나은 서비스 품질을 보장한다. 그러나 응용 프로그램 수준에서 동작하기 때문에 프로그램의 수행 품질보장을 위한 시간 대역을 보장하지 못할 뿐만 아니라 지터의 발생 가능성이 높다. 본 연구에서는 효과적인 버퍼 관리를 통해 서비스 품질의 손실을 최소화하는 적응성 있는 온라인 대역폭 평활화 기법이 안정적으로 동작하기 위한 최적화된 태스크 스케줄링 기법을 제안한다. 먼저 태스크 스케줄링 기법은 멀티미디어 데이터의 생산과 소비를 적시에 보장할 수 있도록 하여 지터의 발생을 최소화하고, 만일 네트워크 지터가 발생하더라도 응용 프로그램 수준의 버퍼 관리를 통해 완충시킴으로서 서비스 품질의 손실을 최소화한다. 모의 실험에서는 제안된 기법이 온라인 대역폭 평활화 기법을 효과적으로 지원함을 보인다.

• The Korean Journal of Applied Statistics
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• v.35 no.1
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• pp.93-104
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• 2022

In forecasting realized volatility of the major US stock price indexes (S&P 500, Russell 2000, DJIA, Nasdaq 100), internet search volume reflecting investor's interests and implied volatility are used to improve forecast via a deep learning method of the LSTM. The LSTM method combined with search volume index produces better forecasts than existing standard methods of the vector autoregressive (VAR) and the vector error correction (VEC) models. It also beats the recently proposed vector error correction heterogeneous autoregressive (VECHAR) model which takes advantage of the cointegration relation between realized volatility and implied volatility.

• The Journal of the Korea Contents Association
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• v.20 no.6
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• pp.220-229
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• 2020

With the recent development of digital technology, the research paradigm is evolving towards data-driven. National management and utilization of research data is a key element not only to enhance research transparency and efficiency, but also to prepare for a data-driven society. Policies and infrastructure for sharing and utilization of research data from publicly-funded research are being actively promoted worldwide. In Korea, related regulations were recently revised to mandate to submit a data management plan (DMP) when proposing a national R&D project. In order to effectively implement the sustainable DMP system, researchers need various support. In addition, guidelines and implementation procedures are essential for management and utilization of research data at the national or institutional level. In this paper, we provide an overview of the data management plan, examine the current status and issues in Korea, and suggest a template and checklists of data management plan, and an implementation procedure at research institutes.

• 한국벤처창업학회:학술대회논문집
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• 2017.08a
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• pp.15-35
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• 2017

The purpose of this research is to investigate the factors which effect the intention to reemploy after the retirement and the mediation effect of the social capitalism for retired and prospective retired baby boomers. Starting from 2010, baby boomers have been retiring at a large scale. However retirement at a large scale without securing provision for fiancial wise in later life can lead to many issues regarding social and fiancial wise such as instability of labour market and increase of spending in society welfare cost and such on. Change of individual's self prospective and institutional support to help prepare find new career for next 3decade after the retirement needs to be concretized. Also, while in the work force, potential retiring baby boomer workers should be systematically supported with education, training and reemployment program based on individual's career orientation and allowing them to stay for a longer period in the labour market can be the implication to the solution for the economic stability and increasing social cost such as public pensions.

• Proceedings of the Korean Society of Community Living Science Conference
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• 2009.09a
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• pp.105-105
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• 2009

농촌 주민의 삶의 질 향상을 위한 범정부적 투자가 이루어져 왔지만 농촌지역의 사회서비스 기준을 도시와 비교해 보면 아직도 부족한 부분이 많이 있다. 농촌 인구가 감소되고 있는 상황에서 지속적인 하드웨어 중심적 투자에 대한 의문제기와 함께 농촌주민들이 최소한의 공적 서비스를 활용할 수 있는 기반이 되어야한다는 의견이 대립되고 있는 가운데 그 해결책을 찾기 위하여 '농촌 서비스 기준'을 설정하자는 논의가 추진되고 있다. 이에 본 연구에서는 도농복합권역으로 370가구 1,650명이 거주하고 있으며 농가는 약 70호, 비농가는 300호이었고 대부분 주민들이 상업에 종사하고 있는 경남 밀양시 하남읍 수산리를 대상으로 농촌 정주지원 서비스 현황 및 요구에 대한 사례분석을 실시하였다. 수산리는 낙동강 나루와 수산장의 역사로 이루어진 마을이다. 70~80년대에는 마을 전체가 시장일 정도로 장이 활성화 되었으나 현재는 전통시장이 붕괴한 상황이었다. 지난 3년간 이주한 가구는 40호, 이주해온 가구는 20호 정도로 매년 인구가 줄고 있는 상황이다. 도로/교통 현황은 밀양시와, 대구, 부산으로 나가는 버스가 시간마다 한 대씩 배차되어 있고, 종합병원, 보건소, 한의원, 약국 등의 의료시설이 갖춰져 있으며, 과거에는 낙동강 범람으로 인한 피해사례가 많았으나 현재는 제방을 쌓아 홍수 피해를 없앴으며, 공기와 식수가 좋고 치안 걱정은 없었으나 전화를 통한 사기가 극성이라고 하였다. 문화/여가생활면에서는 읍사무소에서 일부 프로그램을 진행하고 있으나 참여율이 저조한 것으로 나타났다. 유치원/초등학교/중고등학교 및 사설학원도 있어 교육환경은 비교적 좋은 편이라고 할 수 있었다. 수산리는 마을의 중심에 있는 대규모 장을 둘러싸고 상권이 형성되어 대부분 상업에 종사하고 있었으나 수산장이 쇠퇴하고 상권이 죽어 생활경제면에 어려움이 있다고 하였다. 향후 '4대강 살리기' 정책과 '신공항 입지' 선정에 따른 땅값 상승과 경제 재생 등에 대하여 마을 주민들의 관심이 높았고 복지회관이 생겨 다양한 복지프로그램과 서비스를 받고 싶다고 하였다.

• Journal of the Korean Home Economics Association
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• v.48 no.6
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• pp.103-118
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• 2010

This study used qualitative data to examine how low-income families confront the child care needs of their children in the midst of changes in public policy. The data were drawn from in-home interviews conducted every 6 months with 22 mothers who were welfare-dependent at the start of the research. This research depicted several life stories of the circumstances of poor children that have not had much previous attention in the literature: the general flows and the special conditions of child care among the low-income families with or without a disabled child were reported. The results in this study suggested that enabling families, through both social support and public funding, find affordable and quality child care would be one pathway to foster self-sufficiency in these families.

• Journal of Labour Economics
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• v.30 no.1
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• pp.55-83
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• 2007

This paper examines the welfare aspects of loan-based self-insurance against unemployment, and discusses the scope of government intervention in its provision. This paper deals with these issues in a model where the individuals may experience unemployment shocks frequently to leave little savings for retirement, so that the government may have to provide them with unemployment and retirement insurance benefits during their unemployment and retirement, respectively. We identify the two interesting features in the model: the externality that the self-insurance exerts, upon other social insurances, and the incentive of private sector to provide loans that exerts the externality upon other social insurances. In particular, this paper shows that, although the inefficiency associated with private loan warrants the government provision of loans to unemployed workers, the over-incentive of the private sector to offer loans may reduce the scope of the government intervention. This paper also shows that, unless the inefficiency associated with private loans is high, the private incentive for loans would reduce welfare because of the externality generated by private loans.

• Korea Trade Review
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• v.41 no.1
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• pp.117-138
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• 2016

ODA is an effort and action of international community to keep human rights by eradicating poverty. UN declared MDGs (Millennium Development Goals) during 2001 and 2015. As a follow-up action, UN sets up SDGs (Sustainable Development Goals) during 2016 and 2030. SDGs expands the concept of ODA. SDGs includes cooperation development over the scope of ODA by mobilizing various financial resources from public sectors and private sectors. It will overcome the limitation of traditional ODA and be 'AID and beyond'. Catalytic aid is appropriate for the concept of SDGs. Cooperation development by catalytic aid focuses on building economic infrastructure and production facilities rather than humanitarian aid, which will establish a sustainable development basis for recipient countries. This study suggests to make a PPP business by linking KSP(Knowledge Sharing Program), to objectify criteria of priority recipient selection and aid allocation, to adapt grant and concessional loan complexly according to the business, to support realization of CSV(Creating Shared Value) by establishing SPC(Special Purpose Company) and to construct a PCSD(Policy Coherence for Sustainable Development) system to fulfill the fore-mentioned strategies.

• Korean Association of Arts Management
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• no.54
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• pp.5-31
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• 2020

This study has started from the political process of local community power structure to elaborate the reason why both a majority of cultural artists and cultural artist organizations want to be against establishing the local Foundation for Arts and Culture. The cultural artists and cultural artist organizations believe that the establishment of the local Foundation for Arts and Culture might threaten not only their monopolistic status or their livelihood in the local market relying on public supports, but also make them being marginalized from the potential supports. Therefore many of them have somewhat unfavourable opinions about its establishment. Drawing from the Jellabuk-do case, their concern of being isolated from the monopoly by the local Foundation for Arts and Culture are reduced to publicized discourses such as powerization, the lack of expertise, the loss of independence, and the fall of business. When constructing the Foundation for Arts and Culture, the major values are 'Pluralism' and 'Fairness'. On one hand, the terms of Fairness means that it should be fair in operations, support and executive composition. On the other hand, Pluralism means that policy-making rights should be distributed to various groups, not owned by some specific groups. Some plans for building Foundation for Arts and Culture are needed to make diverse classes and groups to expect the pluralistic interests emerged eventually.