• The Journal of the Korea Contents Association
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• v.17 no.11
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• pp.554-566
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• 2017

Through the Broadcasting Act, Republic of Korea regulates the broadcasting system to remain neutral regarding particular party or candidate. However, as MBC and JTBC reports the issue of President Park's impeachment in bisected way - conservative and progressive - the controversy aroused. This research paper comparatively analyzed each broadcasting company's evening news by focusing on quantity aspect, reporting tendency regarding trend of public opinion and mass rally and the news frame. Our research showed that both JTBC and MBC had partially reported; JTBC on pro-impeachment rally's side which was called candlelight rally, and MBC on anti-impeachment rally's side, called Korean National Flag rally. Regarding the way how they reported the impeachment, JTBC reported much more in depth than MBC, and MBC reported the process emotionally, standing for President Park.

• Journal of Digital Convergence
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• v.11 no.6
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• pp.73-90
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• 2013

Our basic objective in this paper is to identify a relationship among services, technology level, and service innovation activities using service science approach. The empirical tests are two-fold: first, to find out a difference in the level of service innovations, depending on the service levels and vice versa; second, to investigate the relationship between technology level and service activities and between technology level and service innovation activities. The results of the study are as followed: (1) Service innovation activities are different depending on service activities. (2) Service activities are different depending on service innovation activities. (3) Differences between technology level and service activities and between technology level and service innovation activities do not exist. These findings have implications for both research and practice.

• The Journal of the Korea Contents Association
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• v.10 no.3
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• pp.141-148
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• 2010

The aim of this paper is to propose a communication middleware which makes it possible to easily and efficiently develop the networking support for multi-user applications. Even though existing middleware and development tools provides lots of functionalities to realize distributed applications, they are purely low-level services passing the most development efforts to developers, or too specialized for a specific application. It brings a challenging issue of how the middleware supports general and efficient high-level mechanisms. To meet different networking and interaction requirements of multi-user applications, we propose various schemes to provide the communication architecture, the user membership management, the content transmission mechanism and the event management. Our middleware provides developers with application-level APIs and configuration files so that the different interaction requirements of a multi-user application can be easily handled in the developers' point of view.

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.29 no.4
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• pp.48-54
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• 2000

자성재료에 자기장을 걸어주변 가열되고 자기장을 제거하면 냉각되는 성질이 있는데, 이를 자기열량효과(magnetocaloric effect)라고 하며, 이것을 이용해서 저온을 생성시키는 방법을 자기냉동(magnetic refrigeration)이라고 한다. 큐리 온도(Curie temperature) 부근의 강자성체에 자 기장이 가해지면 전자례도내에서 쌍을 이루지 않은 전자들의 자기모벤트들이 자기장에 평행 하게 배열되는데, 이로 인해 열역학적 무질서의 척도인 엔트로피는 낮아지고 이러한 손실을 보상하기 위해 재료의 온도가 올라가게 된다.반대로 자기장이 제거되면 자기모벤트가 본래의 무질서한 상태로 돌아오며, 엔트로피가 증가하 고 재료의 온도는 떨어지게 되는 것이다. 역사적으로 보면 1881년에 Warburg가 큐리온도 부근의 철에서 자기열량효과를 처음 발견하였으며. 1926년과 1927년에 Debye와 Giauque가 각각 단열소자볍 (adiabatic demagnetization)을 제안함으로써 실용화되기 시작하여 주로 극저온을 얻는 방법으로 이용되어 왔다. 1950년도 이전의 연구는 절대온도 영도(OK)에 도달하고 자 하는 순수과학적인 노력으로서 개방사이클(open cycle)을 이용한 단열냉각 방식을 추구하 였으나, 1950년 이후부터는 공학적인 응용을 목적으로 밀폐사이클(closed cycle)을 형성하는 자기냉동기에 관한 연구가 진행되었다. 1976년에 Brown은 희토류(rare earth) 금속인 가돌리늄(Gd)을 사용하여 유체(물 80%와 에틸 알코올 20%)를 재생시킴으로써 상온에서 작동 하는 자기냉동기를 보고한 바 있다. 그는 7 T의 큰 자장을 이용하였으며, 고온부와 저온부의 온도는 각각 $46^{\circ}C와\;-1^{\circ}C로서\;47^{\circ}C$의 온도간격을 얻었다. 자기냉동에 있어서의 또 하나의 중요한 진전은 1978년과 1982년에 Steyert와 Barclay에 의해서 능동자기재생기(active magnetic r regenerator)의 개념이 소개되고 개발된 것으로, 이는 자성재료가 냉매로서 뿐만 아니라 열전달 유체의 재생기로도 사용되는 방식이다. 이상과 같은 자기냉동기술의 발달에 이어서 1997년에 미국의 Astronautics사(Wisconsin주 Madison시 소재)와 Ames 연구소(Iowa주 Ames 시 소재)의 공동연구팀이 발표한 두 가지의 새로운 진전으로 인해 공기조화 및 냉동분야에 적용할 수 있는 자기냉동기의 실용화 가능성이 한층 높아졌다. 이들의 연구결과는 (1) 자기냉동이 실온에서도 실현 가능한 기술이며 증기압 축식 냉동에 필적할 만하다는 것을 보인 것과 (2) 이미 알려져 있던 자기냉동재료보다 자기 열량효과가 훨씬 큰 새로운 재료를 발견한 것이다. 이로써 자기냉동에 대한 관심과 기대가 한결 커지고 있다. 본 원고에서는 자기냉동의 원리가 되는 자기열량효과와 이를 이용한 자기냉동의 방법 그리고 최근에 이루어진 새로운 진전에 대해 소개하고 공기조화 및 냉동분야에의 적용 가능성을 전망해 보고자 한다.

• Membrane Journal
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• v.26 no.3
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• pp.212-219
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• 2016

The alumina hollow fiber membranes were prepared by spinning and sintering a polymer solution containing suspended alumina powders. For determine pore structure of hollow fiber membranes formed by different solvent-nonsolvent interaction rate, dimethylsulfoxide (DMSO), dimethylacetamide (DMAc), triethylphosphite (TEP) were prepared in dope solution by solvent, polyethersulfone (PESf) and polyvinylpyrrolidone (PVP) were used as a polymer binder and additive. The pore structure of hollow fiber membranes was characterized using scanning electron microscope (SEM). The alumina hollow fiber membranes prepared by DMSO, DMAc were had the asymmetric structure mixed sponge-like and finger-like morphology, while TEP solvent were had single sponge-like structure. The prepared hollow fiber membranes were analyzed gas permeation and mechanical strength experiment also. The hollow fiber membrane having single sponge-like structure was had high gas permeation performance. On the contrary to this, more finger-like morphology was less gas permeation performance.

• Korean journal of communication and information
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• v.22
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• pp.249-272
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• 2003

This study discusses on the historical origin of audience's boycott movement to the Korean press. Two historical cases of audience's boycott movement in the early 1920s were analyzed in this study. The first boycott was resolved by the counterforce to the public funeral of Yunsik Kim in February of 1922. This case can be estimated as the historical origin of audience's boycott movement in the Korean media history. The second case was carried out by the National Convention of the Youth Parties in March of 1923. The target of these two cases were The Dong-A Ilbo. And these boycott movement were caused by the conflict and competition between nationalists and socialists in the national independence movement. These two parties were incompatible in the ideology and method of national independence struggle. In the course of their conflict and competition for the initiative socialist party resolved and carried out the boycott movement to The Dong-A Ilbo, because it was regarded as the advocate of the nationalist party.

• Journal of the HCI Society of Korea
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• v.13 no.3
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• pp.65-73
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• 2018

Game balance settings are crucial to game design. Game balancing must take into account a large amount of numerical values, configuration data, and the relationship between elements. Once released and served, a game - even for a balanced game - often requires calibration according to the game player's preference. To achieve sustainability, game balance needs adjustment while allowing for small changes. In fact, from the producers' standpoint, game balance issue is a critical success factor in game production. Therefore, they often invest much time and capital in game design. However, if such a costly game cannot provide players with an appropriate level of difficulty, the game is more likely to fail. On the contrary, if the game successfully identifies the game players' propensity and performs self-balancing to provide appropriate difficulty levels, this will significantly reduce the likelihood of game failure, while at the same time increasing the lifecycle of the game. Accordingly, if a novel technology for game balancing is developed using artificial intelligence (AI) that offers personalized, intelligent, and customized service to individual game players, it would bring significant changes to the game production system.

• Journal of the Korean association of regional geographers
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• v.14 no.2
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• pp.126-140
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• 2008

The purpose of this study was to compare the motivation factors between two groups: Chinese and Japanese tourists in Jeju-do. Also, this study offered an integrated approach to attempts to extend the theoretical and empirical research evidence on causal relationships of each group among motivation factors, perceived value, satisfaction, and intention to revisit and finally, the result of path analysis was compared. The results indicated that Chinese tourists' perceived value was positively affected by tourists' convenience(i.e. reservation system and tour guide) and their cultural experience had an influence on tourists' satisfaction significantly. On the other hand, Japanese tourists' satisfaction was positively affected by tourists' convenience and their perceived value significantly influenced on tourists' intention to revisit. The findings of this study can be used as a marketing strategy for each tourist group.

• Polymer(Korea)
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• v.24 no.3
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• pp.342-349
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• 2000

Hollow fiber membranes were prepared via thermally-induced phase separation process followed by stretching process from isotactic polypropylene and soybean oil system. Various operating parameters were examined in terms of their effects on the structure variation and performances of the membrane, and were optimized. Melt viscosity of the melt sample had influence on the formation of the microfibrils, and addition of nucleating agent increased the nucleation density to enhance the interspherulitic pore formation by stretching. Annealing the membrane at its stretched state relaxed the stress induced by stretching and helped the membrane maintain the stretched structure without shrinking. Solid-liquid Phase separation is more prevalent when the nucleating agent was added, and coagulation bath temperature determined the nucleation density, which affected the pore formation by stretching. In the absence of nucleating agent, nucleation was not effective and liquid-liquid phase separation governed the structure formation, which showed the opposite trend to that of the case with nucleating agent.

• Membrane Journal
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• v.22 no.1
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• pp.54-61
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• 2012

To separate and recover of VOCs, supporting membranes using PEI were prepared by phase separation method and it was coated with PDMS to prepare PEI-PDMS hollow composite membrane. To investigate characteristic of prepared membrane, pure gas permeability was measured using oxygen and nitrogen, the stage cut and permeance property with feed concentration were evaluated using xylene, ethyl benzene, toluene and cyclohexane. Also, to check solvent resistance on VOCs, stress-strain property of membrane with immersion time in solvent were measured by DMA. The permeance value of $O_2$ and $N_2$ showed 63 GPU and 30 GPU respectively. Permeated VOCs concentration was decreased with increasing stage cut. But, conversely, recovery efficiency that was increased with increasing stage cut. As a result of DMA test, the stress and strain were 11.93 MPa and 13.52%, respectively.