• Cartoon and Animation Studies
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• s.19
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• pp.113-126
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• 2010

The digital cartoons market is looking for a new growth momentum as the radical increases of the demands and markets about the mobile contents with portable instrument popularization. The conventional digital cartoons markets which are based on web-toon, page viewer cartoons and e-paper cartoons have been studied various fields to overcome some limitations such as the traditional cartoons had. The mobile cartoons which have been changed more and more, have some canvas limitations due to the mobile screen size. These limitations lead to the communication problems between the cartoonists and the subscribers and resulting some obstacles of mobile cartoons activations. In this paper, we developed a authoring tool applied the Screen Flow method to overcome inefficiency of conventional authoring methods. This proposed method can reflect the cartoonists' during the process of authoring mobile cartoons, thereafter we studied about the authoring method of mobile cartoons and its effects. For the convenience of users creating and distributing content in a way has been studied.

• Journal of The Korean Association For Science Education
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• v.43 no.1
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• pp.17-28
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• 2023

In line with the entry into the digital-based intelligent information society, the science curriculum emphasizes the cultivation of scientific competencies, and computer-based test (CBT) is drawing attention for assessment of competencies. CBT has advantages to develop items that have high fidelity, and to establish a feedback system by accumulating results into the database. However, it is necessary to solve the problems of improving validity of assessment results, lowering measurement efficiency, and increasing management factors. To examine students' responses to the introduction of the new assessment tools in the process of transitioning from paper-based test (PBT) to CBT, in this study, we analyzed the results of the PBT and the CBT conducted in 2021 National Assessment of Educational Achievement (NAEA). In particular, we sought to find the effects on student achievement when only the mode of assessment was changed without change of items, and the effect on student achievement when the items were composed including technology enhanced features that take advantage of CBT. This study is derived through the analysis of the results of 7,137 third-grade middle school students taking one among the three kinds of assessments, which were the PBT or two kinds of CBT. After the assessment, the percentage of correct answers and the item discriminations were collected for each group, and expert opinions on characteristics of response were collected through the expert council involving 8 science teachers with experience in NAEA. According to the results, there was no significant difference between students' achievement results in the PBT and the CBT-M, which means simple mode conversion type of CBT, so it could be explained that the mode effect did not appear. However, it was confirmed that the percentage of correct answers for the construct response items was somewhat high in the CBT, and this result was analyzed to be related to the convenience of the response. On the other hand, there were the items with a difference of more than 10%p from the correct answer rate of similar items, among the items to which technology enhanced functions were applied following the introduction of CBT. According to the analysis of response rate of options, these results could be explained that the students' level of understanding could be more closely grasped through the innovative items developed through the technology enhanced function. Based on the results, we discussed some guidance to be considered when introducing CBT and developing items through CBT, and presented implications.

• The Journal of the Korea Contents Association
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• v.10 no.2
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• pp.165-175
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• 2010

This paper claims the argument that the taste of own is not the intrinsic value but is determined by the environment or habitus, based on Bourdieu's theory. This concept of taste leads up to a natural stream of imitation and alignment. We conclude that the stream is the fashion which be justified by the major agreement. But the nature of fashion exists in hegemony and determines a sense of kinship or a point of difference. In this regard, popular cultures as a window circulated fashion have a negative consequence that can be method of discriminating the minority and justifying vested rights. Accordingly, we have to become wary of the strategy of control using fashion and popular cultures, and need to recognize the prior paradigm about fashion. In the process, we can expect that fandom or counter cultures based on digital high technology constitute subjectivity and dynamics of popular by interaction between the objects.

• Journal of the Korean Institute of Telematics and Electronics
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• v.20 no.1
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• pp.63-71
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• 1983

A dye-edge tracking algorithm was used to determine the corresponding points in the two images(anterior-posterior and lateral) of the digital subtraction biplane angiography. This correspondence was used to reconstruct three dimensional images of cerebral artery in a dog experiment. The method was tested by comparing the measured image of oblique view with the computed reconstructed image. For the present study, we have developed three new algorithms. The first algorithm is to determine the corresponding dye-edge points using the fact the dye density at the moving edge avows the same changing pattern in the two projection views. This moving pattern of dye-edge density is computed using a matching method of cross-correlation for the two sequential frames' dye density. The second algorithm is for simplified perspective transformation, and the third one is to identify the specific corresponding points on the small vessels. The present method can be applied to compute the blood velocity using the dye-edge displacement and the three- dimensional distance data.

• 한국HCI학회:학술대회논문집
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• 2006.02b
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• pp.803-809
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• 2006

이 연구는 인터넷 소설을 읽을 때 사용자의 참여도에 따라 그 내용의 이해도가 어떻게 영향을 받는지 알아 보고자 한다. 현재 인터넷 소설은 소설의 양식이 인쇄매체에서 인터넷 매체로 옮겨졌음에도 불구하고 인터넷이라는 매체의 특성을 활용하지 못하고 있다. 인터넷 매체의 여러 특징들 가운데 상호작용성은 인쇄매체에서 인터넷 매체로의 전환을 이룬 다른 장르에서 주요 특징으로 고려되고 있다. 이것은 디지털 스토리텔링에서 사용자의 활동(action)에 관한 부분으로 활동적인(active) 사용자의 참여를 말한다(이 연구에서는 상호작용성을 사용자가 매체에 활동을 통한 개입, 사용자 참여도로 조작적 정의를 내린다). 또한 모니터를 통한 글 읽기는 인쇄매체에 비해 가독성이 떨어지고 훑어보는 글읽기(scanning)가 이루어지기 때문에 내용을 이해하는 데 어려움이 따른다. 인터넷 매체의 특성을 살리면서 글에 대한 이해도를 높이기 위해 사용자의 참여도를 독립변인으로 글의 이해에 미치는 영향을 알아보고자 했다. 실험 1에서는 기존의 단편 추리 소설을 이용해 사용자의 글읽기 과정에서 범인추측의 정도에 차이를 주어 참여도에 변화를 주었다. 그 결과 사용자의 참여도에 따라 이해의 정도가 유의미함을 보였다. 이는 사용자의 참여도가 이해에 영향을 미친다는 기존 연구를 뒷받침하며 인터넷 소설에서 인터넷 매체의 특성을 살린 글의 기재가 글의 이해에 도움이 된다는 것을 말해준다. 실험 2에서는 실험 1과 같은 추리 소설을 이용하되 사용자의 참여도에 따라 소설 내용의 변화를 주었다. 실험 2의 결과 내용 변화에 따른 이해도의 차이는 나타나지 않았으나 자신이 선택하지 않은 경로로의 이야기 내용에 궁금증을 보고하며 글의 전체 내용에 관한 관심을 보였다. 이는 사용자의 참여가 글의 이해뿐만 아니라 흥미유발에도 영향을 미친다는 가능성을 보여주므로 상호작용적인 글읽기와 흥미유발에 관한 추후연구가 필요함을 시사한다. 이 연구는 또한 기존의 인터렉티브 스토리텔링 연구가 현 상황에 대한 보고와 구현된 시스템의 사용성 평가에 국한된 것에 반해 실험 연구로의 변화를 꾀하였다는 것에 의의를 둘 수 있다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.18 no.2
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• pp.202-206
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• 1993

To secure the 64 kbps clear channel capability in the ISDN, it was decided to convert its North American digital transmission system into the European system especially in DS1 level. But their different companding law became an issue in the process of R&D in the existing time division digital switch such as TDX-1 to incorporate it into the ISDN. TDX-1 has been installed with North American ${\mu}$ companding law and its ISDN capability is under development now. Thus, because of the ${\mu}$ law/A law conversion for the interworking of two different transmission system, it is difficult to maintain the ISDN B channel transparency between TDX-1 and new European system with A companding law. Among some solutions for it, European frame format with ${\mu}$ law companding is recommended. Those problems and solutions are presented in this paper.

• 한국신재생에너지학회:학술대회논문집
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• 2011.11a
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• pp.129.1-129.1
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• 2011

최근 급격한 경제성장과 고도 산업사회로의 전환에 따라 에너지 수요가 크게 증가하고 있다. 이에 따라 석유, 가스 등 화석에너지의 소비량과 온실가스 배출량이 급격히 늘어나고 있는 실정이다. 따라서 화석에너지의 소비와 온실가스 배출을 저감시키기 위해 친환경적인 에너지를 이용하기 위한 많은 연구가 이루어지고 있다. 이와 같은 노력 중 하나가 바로 태양열에너지를 이용하는 방법이다. 태양열에너지는 자원 고갈의 우려가 없고, 에너지의 이용 과정에서 공해 물질을 배출하지 않아 대체 에너지원으로 각광을 받고 있다. 하지만 에너지 밀도가 낮고 에너지의 공급이 기상조건에 따라 큰 영향을 받으므로 태양열에너지를 이용하기 위해서는 효율적인 집열시스템이 필요하다. 따라서 본 연구에서는 우수한 열적특성을 가진 탄소나노유체를 히트파이프 작동유체에 적용하여, 태양열 집열기의 효율을 향상시키기 위해 탄소나노유체의 열전도도 및 점도특성을 비교분석하였다. 나노유체는 에탄올에 산화 다중벽 탄소나노튜브(Oxidized Multi-walled Carbon Nanotubes, OMWCNTs)를 혼합하고, 초음파 분산하여 제조하였다. 에탄올-산화탄소나노유체의 열전도도와 점도는 저온($10^{\circ}C$), 상온($25^{\circ}C$), 고온($70^{\circ}C$)에서 측정하여 비교분석하였으며, 열전도도는 전기 전도성 유체의 비정상 열선법(Transient Hot-wire Method)을 이용하여 측정하였고, 점도는 회전형 디지털 점도계를 이용하였다. 실험 결과 0.1 vol%의 에탄올-산화탄소나노유체의 열전도도는 기본 유체 대비 33.72%($10^{\circ}C$), 33.14%($25^{\circ}C$), 32.26%($70^{\circ}C$)가 향상되었으며, 점도 또한 기본유체보다 크게 증가하지 않아 히트파이프 작동유체로서 우수한 효과를 나타낼 수 있음을 확인하였다. 본 연구의 결과는 태양열 집열기 히트파이프의 효율 향상을 위한 기초자료로써 유용한 정보를 제공할 것이라 판단된다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.10 no.3
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• pp.61-68
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• 2010

Korea has made a plan to allocate CH 14~CH 51 (470 MHz~698 MHz) for DTV transition. Therefore, It is a necessary to take account compatibility between DTV service and other potential services. This paper assumes that DTV service operates on CH 51(692 MHz~698 MHz) and IMT service operates on CH 52(698 MHz~704 MHz), and then analyzes compatibility between DTV service and IMT service with Spectrum Engineering Advanced Monte Carlo Analysis Tool(SEAMCAT). The interference probability from IMT service to DTV service and capacity loss of IMT service due to interference from DTV service is studied, respectively. For the simulation, four interference cases in four different scenarios are considered. With considering the depolarization factor, a guard band of 8 MHz is required in the case of between IMT service downlink(DL) and DTV service, in the case of between IMT service uplink(UL) and DTV service, a guard band of 6 MHz is needed for the worst case of urban scenario on consideration of more then 15 dB increase of IMT system base station(BS) receiver blocking level.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.38B no.10
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• pp.851-860
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• 2013

To overcome a scarcity of radio resources to mobile broadband service, the usage of TV white space gains much attraction around the world. This paper carries out an interference analysis either by performing realistic experiments or by executing statistical Monte-Carlo simulation to exploit interference probability. The results obtained from experiments are compared to those from simulations in order to clarify the coexistence of utilization of TV band devices (TVBD) in indoor circumstances. Along the execution of our experiment in the presence of DTV receiver, we apply to a variety of transmission parameters proposed in FCC for TVBD. According to experimental and simulation works, the allowable transmission powers of TVBD systems are exploited for the plausible which are coexist on the first as well as the second adjacent frequency bands. Throughout results, it can conclude that TVBD systems can be coexisted via achieving proper transmission powers depending on the locations of themselves without showing harmful interference to DTV reception.

• Journal of Biomedical Engineering Research
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• v.21 no.4
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• pp.339-344
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• 2000

The mucociliary system is one of the most important airway defense mechanisms in human body and impairment of ciliary movement results in various diseases in respiratory tract. In this study, we have developed a system that can measure ciliary movement in vivo and quantified ciliary beat frequency (CBF) through autoregressive (AR) power spectrum. To measure the frequency in vivo, we applied a photoelectric method that was composed of a laser light and a fiber optic probe. Scattered signals are transferred to a PC in which they are displayed on the monitor and its CBF is determined by the AR method in were acquired. For 8 normal subjects, the analyzed CBFs ranged from 5 to 10Hz and its mean was 7.3${\pm}$1.1Hz. This result showed similar aspects to the reported results of CBFs to data. We expect that this result will be applied in various clinical studies such as analysis of CBF changes by drugs or by diseaes.