• Proceedings of the KIPE Conference
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• 2015.07a
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• pp.469-470
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• 2015

본 논문에서는 PFC(Power Factor Correction) 컨버터의 초기 구동시 발생하는 돌입전류 문제 및 스위치의 고장을 진단하는 방법에 대해 기술한다. PFC 컨버터는 초기 구동시 출력단의 대용량 커패시터에 의해 높은 돌입전류가 발생하여 시스템 손상 및 전력 계통의 품질과 고조파를 발생하는 문제점을 갖고 있다. 따라서 본 논문에서는 저항과 스위치를 이용한 PFC 컨버터의 초기 돌입 전류 제한 및 안정적인 동작을 위한 스위치 고장진단 방법을 제안하고, 시뮬레이션을 통해 타당성을 입증하였다.

• Proceedings of the KIPE Conference
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• 2015.07a
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• pp.471-472
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• 2015

본 논문에서는 PFC(Power Factor Correction) 컨버터가 초기 구동시 발생하는 돌입전류를 제어하기 위한 새로운 PFC 컨버터를 제안한다. 기존 Boost 구조를 갖는 PFC 컨버터는 안정적인 출력 전압을 생성하기 위해 출력단에 큰 커패시터가 필수적이지만 방전된 커패시터에 AC 전압이 인가되면 단락 상태가 되어 큰 돌입전류가 발생하게 된다. 이를 해결하기 위해 본 논문에서는 시뮬레이션을 통해 기존 PFC 컨버터의 돌입전류 문제점을 파악하고 제안된 PFC 컨버터로 돌입전류를 제어함으로써 안정적인 동작 상태와 효율적인 PFC 컨버터의 타당성을 검증하였다.

• Proceedings of the KAIS Fall Conference
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• 2011.12a
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• pp.54-57
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• 2011

본 논문은 가상현실과 증강현실에서 다양한 정보와 촉감을 통한 인지심리학 적인 측면의 햅틱이 사용된 영상에 관하여 알아보고자 한다. 미래를 그리는 공상과학영화에서 햅틱의 사용은 근간에 많이 이루어지고 있는 것 같지만 영상에서 표현되는 부분은 극히 드문 실정이다. 이에 헵틱의 기술의 발전과 영상에서 표현되고 있는 햅틱의 기술에 대해 알아보고, 현재 어떤 제품들이 사용되고 있는지 살펴보고자 한다. 본 논문은 먼저 연구동향을 통해 햅틱의 역사와 기술에 대하여 알아보고, 이를 통해 햅틱 기술의 전망을 조사하였다. 영상에서의 햅틱 구현은 어떤 모습을 통해 구현이 되었는지 조사하였으며, 이를 통해 현재 상용화 되고 있는 기술에 대하여 알아보았다. 또한 이를 통해 가상의 세계를 표현한 영상에서 햅틱의 기술이 어디까지 구현이 되고 있으며, 햅틱의 현재기술은 어디까지 전개되고 있는지에 대한 경향을 알아보고자 하였다. 이러한 연구를 바탕으로 햅틱 기술이 사용될 수 있는 부분은 어디까지 인지 예측하여 보았다.

• Journal of Arbitration Studies
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• v.28 no.4
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• pp.193-208
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• 2018

"중재제도를 보완하고 중재의 공신력을 향상하며" 국제상사중재의 현대화 및 국제화를 강화하는 것은 새로운 시기에서 중국 중재사업의 발전방향이자 ""일대일로" 국제상사분쟁 해결시스템 및 기관의 설립에 관한 의견"의 필연적 요구이다. 다원적 분쟁해결시스템의 중요한 구성부분으로서, 국제상사중재는 독보적인 편의성, 종국성, 전문성 및 결과집행의 용이성 등 여러 장점으로 인해 상사거래에서 이를 선택하는 상사주체들이 점점 많아지고 있다. 유효한 중재합의는 중재절차 개시의 전제이지만 국제상사중재안건 중에서 서로 다른 국가 또는 지역의 분쟁주체들은 종종 각기 다른 국적으로 인하여 중재안건의 법률적용이 다르게 됨에 따라 법률효과가 크게 달라지는 경우를 직면하게 된다. 이런 경우, 중재분쟁의 효과적인 해결은 보증하기 어렵다. 본 논고는 중재합의의 효력문제를 연구대상으로 하고 중국 국제상사중재합의의 법률적용문제에서 출발하여 중국 국제상사중재합의와 관련한 법률규정과 사법실무를 결합하여 지금 중국 국제상사중재합의의 효력에 대한 인정에서 존재하고 있는 문제점들을 분석하고 상응한 건의를 제기함으로서 중국 중재법의 개정과 보완에 합리적이고 가능한 방향을 제시하고자 한다.

• Journal of English Language & Literature
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• v.54 no.4
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• pp.461-482
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• 2008

The science fiction was established as a typical genre of the American popular culture by the monumental releases of two series: Star Wars and Star Trek. Based on the popular science discourse, these two series have functioned as an ideological apparatus for re-appropriating Frontierism which reflects the essential values of American myth. Arguably, the SF genre owes its success mainly to the increasing popularity of science during the 1960s and 1970s, which was well represented in the space project of NASA. This power of popular science, however, tended to weaken in the 1990s as the public interest in NASA's project gradually decreased. "Deep Space Homer," an episode of The Simpson's fifth season, reflects the changing attitude of the American audience toward the new American hero created in the SF series of popular science in the previous popular culture.

• Cross-Cultural Studies
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• v.42
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• pp.505-524
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• 2016

This study examines the ways District 9, a film released in 2009, reworks the sci-fi genre to explore the human encounter with "other" alien populations. Like Avatar, released in the same year, District 9 addresses the tropes of conflict over land and human-alien hybridity and introduces non-humans and aliens, not as invaders, but as objects of human oppression and cruelty. Unlike many other science fiction films where the encounter between humans and non-humans occurs in an unidentifiable future time and location, District 9 crosses genre barriers to engage with urban realism, producing a social critique of contemporary urban population problems. The arrival of aliens in District 9 occurs as part of the recorded human past and the film's action is carried out in the present time in the specifically identified city of Johannesburg. A distinctly anti-Hollywood film that locates the action at the street level, District 9 plays out human anxieties about contact with others by referencing the divisions and conflicts historically attached to South Africa's sprawling metropolis and its current problems of urban poverty and illegal immigrants. Focusing on how this particular urban setting frames the film, the study investigates the ways Blomkamp's sci-fi film about extra-terrestrials presents a curious postcolonial mix of aliens and immigrants surviving in abject conditions in an urban slum and forces a realistic examination of the contemporary social problems faced by South Africa's largest city and by extension other major global cities. The paper also examines the film's representation of the human-alien hybrid and its potential as a force to resist human exploitation of the other. It also claims that though the setting is highly local, District 9 speaks to a wider global audience by making obvious the exploitative practices of profit-seeking multinationals. A sci-fi film that is keen on making a social commentary on urban population conflicts, District 9 resonates with the wider sense of insecurity and fear of others that form the horizon of the uncertain and potentially violent contemporary human world.

• Archives of design research
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• v.11 no.2
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• pp.5-14
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• 1998

The hopes for making vivid images of mankind made 'film' that reflects easy communications. Film have made satisfactions to imagination of man by varied experimental expressions from the beginning. Many of directors and producers were eager to make film to be with relevant views. At last film has making to do with the digital tool, so called 'Computer Graphics' . Making images through computers have changed more better with the developing skills of softwares. NASA has developed Aero-Simulations first, it have called computer graphics for the first time in history. The computer graphics can make images with very varieties that had not exprerienced before and we won't expect the upcomming skills of it. Special Effects(SFX) through the films began the genre of Science Fiction in the era of ideology and space competetions and producer George Lucas made the firm named ILMOndustrial Light & Magic) to making picture of SFX. At last 'Abyss', 'Terminator II', 'Toy Story' and 'Forrest Gump' have made to us with many splendid arangements by the computers. Especially, we can concluded that the relevant expressions as in 'Forrest Gump' is the unexpected charming and human images with wonder. In Korean films are less varied, relevant and reasonable than that of American films, in this study I hope to develope more natural Korean computer graphic in near future.

• Proceedings of the KSME Conference
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• 2007.05b
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• pp.2148-2153
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• 2007

The electricity conversion-efficiency of solar cell for commercial application is about 6-15%. More than 85% of the incoming solar energy is either reflected or absorbed as heat energy. Consequently, the working temperature of the photovoltaic cells increases considerably after prolonged operations and the cell's efficiency drops significantly. PV/T refers to the integration of a PV module and a solar thermal collector in a single piece of equipment. By cooling the PV module with a fluid steam like air or water, the electricity yield can be improved. At the same time, the heat pick-up by the fluid can be to support space heating or service hot-water systems. In this study, a pulsating heat pipe solar heat collector was combined with single-crystal silicon photovoltaic cell in hybrid energy-generating unit that simultaneously produced low temperature heat and heat and electricity. This experiment was investigating thermal and electrical efficiency for evaluation of a PV/T system.

• The Journal of the Korea Contents Association
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• v.20 no.11
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• pp.49-57
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• 2020

In this paper, the causal relationships in Onward are compared and contrasted with the ones in Up. The characters in Up purposefully move to action for the given cause. The residents there accept the surreal beings as normal. Thus, the viewers understand such surreal beings in the scene as part of the fantasy world of Up. The protagonists in Onward also have purpose for the actions they take. For achieving their goal, they choose problem solving method from the magical world. However, there is no causal relationship between reality and their world. Thus, it fails to persuade its viewers.

• Journal of Haehwa Medicine
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• v.16 no.1
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• pp.107-114
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• 2007

1. So-gal IS also called as so-jung, So-dan, Pe-so, Jung-so. Gyuk-so. 2. Cause of So-gal is impairment of Jin-Aek. induced by mal intake. stress, overstrain, intoxication, aging. The process is done by Cho-yeol. 3. Symptoms of So-gal is classified m to three categories Sang-So stands for polydipsia, Jung-So stands for polyphagia and weight loss, and Ha-So stands for polyuria. 4. In treating of So-gal, Chung-Hwa Bo-eum Bo-yang is the main principle. The fundamental basis of treating So-gal is Chi-shin. 5. It is not easy to perfectly classify symptoms of So-gal into three categories Therefore further inquiry is required on classification methods of So-gal.