• 경영과학
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• 제24권2호
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• pp.95-114
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• 2007

The main attractant of portable multimedia player(PMP), is often their versatility : being able to load and play different formats of video, audio, digital images, and interactive media. In this paper, we investigate the factors influencing the usage the PMP, based on the extended version of the Technology Acceptance Model. Using the data collected from online survey, we show that perceived usefulness, perceived ease of use, and perceived enjoyment are the major determinants for using PMP. Factors, including ubiquitousness, community, and image are shown to directly or indirectly determine the level of perceived usefulness and ease of uses. In addition, we classify PMP users into two groups, users seeking hedonic value and utilitarian value, and examine the differences in path coefficients. Properties of the causal paths, including standardized path coefficients, the significance of difference, in the hypothesized model, are also presented, so that we can investigate the relative influences of different dominants, demonstrating how two groups differ in their decision-making processes regarding the PMP usage.

• Journal of information and communication convergence engineering
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• 제9권1호
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• pp.1-5
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• 2011

Everyday, technology is evolved in many different disciplines. Computer and smart devices revolution take part of the evolved technology that continuously promising new features. Moreover, social networks services recently become widely popular, which most people in the world become a social-network-fond. In addition to the revolution of the evolved technology and social networks services, ubiquitousness is taking significant part in our daily lives. Although, there are many e-learning systems already existed, which use Internet technology along with a Web technology to provide education in various ways, in despite of that, there is no such existing system exploits the usefulness of smart devices along with the legacy of the online social networks besides the power of the ubiquitous computing technology. Therefore, we propose a smart device application, which fills the gap that has been missing in the recent contemporary era. It is an application that runs on smart devices particularly Smartphone devices; we call our system “Smart Device based Social E-learning System(SDES)”. We have preliminary implemented our system on Android OS. In this paper, we intentionally propose the system in order to ease the way people learn, to provide interactive accessibility in our system, and to utilize the advanced technology more wisely.

• 천문학회보
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• 제46권2호
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• pp.56.4-57
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• 2021

The low surface brightness (LSB) universe has been largely unexplored. The LSB structures are extremely difficult to image due to systematic errors of sky subtraction and scattered light in he atmosphere and in the telescope. Among the systematic errors of sky subtraction, the widespread presence of Galactic cirrus clouds is one of the major obstacles in studying the LSB features of extragalactic sources. Interstellar dust clouds are also fundamental to understand many issues in the Milky Way. Therefore, understanding the Galactic cirri is a crucial topic in the LSB studies. We present the ubiquitousness and current understanding of the Galactic cirri. We also discuss what is necessary to study the LSB features with K-DRIFT and what we can learn from the K-DRIFT observations.

• Journal of Korean Biological Nursing Science
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• 제15권1호
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• pp.1-7
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• 2013

Purpose: The research was to investigate the effect of line dance programs on oxygen saturation level and happiness of elderlies. Methods: Researchers had conducted a series of test to measure peripheral blood vessel oxygen saturation level, pulse and happiness level of 47 elderlies from the D district of G city. Collected data were analyzed with ${\chi}^2$-test and independent t-test, equipped with SPSS WIN 17.0. Results: As a result of serial tests, Pre-test and Post-test of line dance performance showed that oxygen saturation of the Experimental group had significant increase following the program and happiness of the Experimental group also had significant increase following the program. Conclusion: In conclusion, with many advantages such as its easiness to access and emulate as well as its ubiquitousness as an aerobic exercise, line dance cannot only be very beneficial to cardiovascular function and relation of elderlies, but also to emotional and psychological effect, considered as a great breakthrough to improve comprehensive well-being in both physical and mental aspects.

• 정보처리학회논문지A
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• 제16A권5호
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• pp.307-318
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• 2009

컴퓨터 그래픽스에서 구름과 같은 대기 현상을 모델링하고 렌더링하는 것은 그 복잡성과 규모, 편재성 등으로 인해 상당히 까다로운 연구과제들 중의 하나이다. 본 논문은 컴퓨터 게임이나 항공 시뮬레이션 분야에서 요구되는, 실시간에 처리될 수 있는 구름 모델링과 렌더링 방법을 제안한다. 제안하는 방법은 사용자가 직관적이고 대화형 편집 과정을 거쳐 권운, 층운, 적운 등의 다양한 형태를 생성할 수 있다. 또한, 메타볼과 계층적 구형 파티클을 사용하여, 세부 묘사를 자동으로 추가할 수 있다. 생성된 파티클들은 다중 순방향 산란과 이방성 산란을 고려하여 빌보드 방식으로 출력함으로써 실시간 처리가 가능하다.

• 한국콘텐츠학회논문지
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• 제19권5호
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• pp.426-442
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• 2019

본 연구는 밀침-당김-계류 모델을 기반으로 신용카드 등의 기존 결제방식에서 간편 결제로의 전환 행동 과정에서 영향 가능 요인들을 선행 연구를 통해 살펴본다. 또한 이들 요인들이 간편 결제로의 전환 의도에 어떻게 영향력을 미치는 지를 실증적으로 검증해 본다. 특히, 영향 가능 요인으로 정책 기대의 조절 효과도 검증해 본다. 연구의 결과, 밀침 요인으로서 기존 시스템에 대한 불만족, 당김 요인들로서 인지된 간편성 및 서비스 신뢰, 그리고 계류 요인들로서 감성적 인지적 관성 및 비호의적 주관적 규범이 간편 결제로의 전환 의도에 영향을 미치는 것으로 나타났다. 정책 기대는 인지된 편재성과 전환 의도 사이에서 조절 효과를 보이는 것으로 확인되었다.