Bipartite Preference aware Robust Recommendation System

온라인 시스템이 활성화 되고 접근 가능한 정보의 양이 늘어나면서 추천 시스템의 영향력 또한 커지고 있다. 하지만일부 악의적인 유저들의 공격으로 인해 시스템에 대한 신뢰도를 저하시키고 조작하려는 시도가 늘고 있다. 본 연구팀은해당 리뷰에 대한 공감, 비공감 비율을 분석하고 이를 추천 시스템에 적용함으로써 추천 시스템의 성능을 향상시키고강건한 시스템을 유지할 수 있는 방법을 제안한다. 실제 영화 데이터를 수집하여 적용해 본 결과 기존의 추천 시스템보다 향상된 성능을 보였다. Due to the prevalent use of online systems and the increasing amount of accessible information, the influence of recommender systems is growing bigger than ever. However, there are several attempts by malicious users who try to compromise or manipulate the reliability of recommender systems with cyber-attacks. By analyzing the ratio of 'sympathy' against 'apathy' responses about a concerned review and reflecting the results in a recommendation system, we could present a way to improve the performance of a recommender system and maintain a robust system. After collecting and applying actual movie review data, we found that our proposed recommender system showed an improved performance compared to the existing recommendation systems.N

Contestable Public Service Broadcasting Fund:Development and Implications

This paper aims to explore the contestable public service broadcasting funding system by which public monies for the provision of public interest broadcasting are distributed not to one or two public service broadcasters but to any applicant in open competition. It traces, to this end, debates on the issue of funding public service broadcasting on the contestable basis and attempts to classify this funding system into several types. In addition, the possibility of introducing the contestable funding system into South Korea is examined. Arguments for funding public service broadcasting through open competition are based on the notion that competition will improve both the competitiveness and the accountability of public service broadcasters. Contestants for the fund have to demonstrate their suitability to discharge the public interest functions in question against rival potential suppliers. A similar approach in Western Europe has already become the norm for the distribution of public funds in fields other than broadcasting such as public transportation, electricity supply and health care. According to a policy report of UK Conservative Party, the contestable funding system is to provide not only a means of guaranteeing diversity of voice, but also a way of ensuring high creative standards. The authors divide this contestable funding system into five models: 'Funding Producers for Program Making', 'Funding Broadcasters for Program Making', 'Funding Broadcasters for Broadcasting Operation', 'Franchising Public Broadcasting Service', and 'Broadcaster's Program Commissioning'. First, 'Funding Producers for Program Making' is a competition model by which public fund is distributed through a government agency or an independent organization to producers for each program making. Second, under 'Funding Broadcasters for Program Making' model, broadcasters receive public fund for their total cost for public interest program making. Third, 'Funding Broadcasters for Broadcasting Operation' is a model by which broadcasters receive public fund for their operation cost in addition to total cost for public interest program making. Fourth, under 'Franchising Public Broadcasting Service' model, broadcasters would compete to run PSB channels. Fifth, 'Broadcaster's Program Commissioning' model would turn a public service broadcaster into a commissioner without any production, instead filling its broadcast schedule with programs made by independent producers. Objectors to the use of contestable funding such as BBC have argued that it would not be an efficient or effective use of public funding, since it would both spread limited resources more thinly, and could increasingly substitute for other sources of investment. Nevertheless, it might be expected that competition for public funding will introduce a quality driver comparable to the pressure under this current 'battle-for-ratings' system. If a society would introduce this competition model of public funding for broadcasting, it should guarantee beforehand two preconditions: the one is the distribution body's independence from political pressures and its capability of exercising adequate creative judgment and the other is to increase the volume of current PSB fund

A Case of Treatment of Methanol Poisoning by Hemodialysis

Methanol poisoning has been reported as a cause of death and blindness. But recently cases of successful treatment of methanol poisoning have been reported since advent of dialysis. Here we describe a case of treatment of methanol poisoning with severe metabolic acidosis without complications using ethanol, sodium bicarbonate and hemodialysis