• The Journal of the Acoustical Society of Korea
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• v.21 no.8
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• pp.708-718
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• 2002

In this paper, the problems in identifying the noise sources by using the sound intensity technique are dealt with for the general radiated near-field from vibro-acoustic sources. For this purpose, a three-dimensional model structure resembling the engine room of a car or heavy equipment is considered. Similar to the practical situations, the model contains many mutually coherent and incoherent noise sources distributed on the complicated surfaces. The sources are located on the narrow, connected, reflecting planes constructed with rigid boxes, of which a small clearance exists between the whole box structure and the reflecting bottom. The acoustic boundary element method is employed to calculate the acoustic intensity at the near-field surfaces and interior spaces. The effects of relative source phases, frequencies, and locations are investigated, from which the results are illustrated by the contour map, vector plot, and energy streamlines. It is clearly observed that the application of sound intensity technique to the reactive or reverberant field, e.g., scanning over the upper engine room as is usually practiced, can yield the detection of fake sources. For the precise result for such a field, the field reactivity should be checked a priori and the proper effort should be directed to reduce or improve the reactivity of sound field.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.16 no.6
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• pp.103-108
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• 2016

The size of urban areas is currently growing and the functions of cities are becoming increasingly complicated. Furthermore, more people are living in cities. The life of urban is getting closer and linked with neighboring people in many parts. In particular, people are making artificial noise, even though it might not consciously be noticed, in their daily live. Seoul is the most crowded place in Korea and the noise levels are 73dB or higher. People living in cities are exposed to noise pollution. In particular, loudspeakers used during demonstrations or to generate publicity, cause considerable noise, which in turn can be related to stress. Moreover, the noise restrictions defined by law are not adhered to. If enhanced noise regulations, no matter how residents are not forced to be a great stress field close to the noise and reduces the loudness -5dB do not feel well if the difference. Limiting the duration of noise rather than reducing the volume thus is a much more plausible way of reducing the damage caused by noise pollution. If the stress caused by the noise, you will see people or vehicles holding a megaphone at the roadside is not good for health if it may be a wise way to live that is getting rid of the noise pollution so quickly out of the area.

• 한국벤처창업학회:학술대회논문집
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• 2017.04a
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• pp.57-57
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• 2017

최근 들어 대학 내 창업교육은 정부 및 공공, 지방자치단체 등의 관심과 지원으로 급격히 확산되고 있다. 교양 및 전공분야의 다양한 창업교육 강좌 및 창업 친화적 학사제도 등 인프라 및 환경적 요인도 충분해졌다고 할 수 있다. 하지만, 그럼에도 불구하고 아직까지 양질의 창업교육 콘텐츠 및 교수법, 교수 역량 활성화, 지역 및 대학 간 편차 해소 등 질적인 부분에 있어서는 새로운 변화와 보완이 필요하다고 할 수 있겠다. 이에 본 연구는 대학 내 교수자, 교직원, 학생들이 손쉽게 접근하고 활용할 수 있는 온라인 창업교육 플랫폼 구축을 통해 대학 창업교육의 질적 고도화 방안을 제시하고자 한다. 아울러 본 연구를 통해 수도권과 지역 대학 간 발생하고 있는 창업교육의 편차를 해소하고 질 좋은 창업교육 운영 및 콘텐츠 지원을 위한 체계적인 온라인 창업교육 시스템 구성 체계 및 기능, 활용방안, 기대효과 등을 제언하고자 한다. 본 연구는 대학에서 운영하고 있는 창업 교육 관리시스템을 개발하기 위해서 시스템 개발의 기본 방향을 설정하고, 그에 따른 정보화교육 관리시스템에 대한 준수하여야 할 기본 설계 방향을 설정할 것이다. 구조적 개발 방법론을 적용하여 시스템의 기능적 요구사항을 도출하고, 시스템 요구를 만족시킬 수 있도록 설정한 시스템의 주요 기능에 대하여 기술할 것이며, 개발해야 할 된 시스템의 구성도 및 시스템 운영 시 필요한 하드웨어 소프트웨어 제반 운영환경에 대하여 논의하고자 한다. 온라인 창업교육플랫폼을 개발함에 있어 가장 우선 검토해야 할 요건은 창업교육과정을 원하는 학생들과 교강사가 플랫폼에 간단하게 접근할 수 있도록 하는 것이다. 또한 교 강사들이 언제든 플랫폼을 통하여 시스템에 접근하여 학생의 교육과정 내용과 진도사항, 창업 관련 자료에 대하여 제공 받을 수 있도록 하며, 학생들이 교강사에게 멘토링 받고 싶은 내용이 있다면 플랫폼을 통해 멘토링이 가능하여야 할 것이다. 본 연구를 통하여 개발하는 온라인 창업 교육 플랫폼은 관리자, 학생, 교강사 등 구성원들의 요구사항을 청취하고, 이들의 요구를 정확히 분석하여 구성원들의 불편함을 해소할 수 있도록 개발하고자 한다. 플랫폼의 구성요소는 첫째, 온라인 창업 교육 플랫폼은 온라인 기반으로 구성하여 교강사와 학생들이 교육의 효율성을 위하여 공동으로 사용할 수 있는 사이트 공간을 제공할 필요가 있다. 둘째, 온라인 창업 교육 플랫폼의 주된 이용자는 창업 교육을 받는 학생과 창업교육을 하는 교 강사도 이를 관리하기 위한 전체 및 지역별 운영관리자도 존재해야 할 것이다. 셋째, 창업교육에 참여하 학생 및 교강사들의 컴퓨터 활용도의 차이가 있을 수 있을 것이다. 플랫폼은 비주얼하게 개발하여 학생 및 교강사가 쉽고, 부담 없이 접근할 수 있는 이용자 인터페이스를 채택해야 하며, 아울러 이해하기 쉬운 메뉴와 간결하게 구현해서 제공할 필요가 있으며, 이것은 온라인 창업교육 플랫폼 사용의 효율성을 제공하는 것이다. 학생들에게는 플랫폼 통하여 자신들의 창업 능력을 배양하여 학습에 도움이 되어야 하며, 교강사에게는 언제든 실시간으로 최신의 정보를 제공함으로써 플랫폼에 대한 신뢰성이 확보 될 수 있도록 설계 되어야만 창업교육의 효과를 극대화 할 수 있으며, 대학 등에서는 보다 안정적인 학생 관리에 최선을 다 할 수 있을 것이다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.12
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• pp.8455-8461
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• 2015

In this paper, we propose new search algorithms using SVD(Singular Value Decomposition) for fast search of Raman spectrum. In the proposed algorithms, small number of the eigen vectors obtained by SVD are chosen in accordance with their respective significance to achieve computation reduction. By introducing pilot test, we exclude large number of data from search and then, we apply partial distance search(PDS) for further computation reduction. We prepared 14,032 kinds of chemical Raman spectrum as the library for comparisons. Experiments were carried out with 7 methods, that is Full Search, PDS, 1DMPS modified MPS for applying to 1-dimensional space data with PDS(1DMPS+PDS), 1DMPS with PDS by using descending sorted variance of data(1DMPS Sort with Variance+PDS), 250-dimensional components of the SVD with PDS(250SVD+PDS) and proposed algorithms, PSP and PSSP. For exact comparison of computations, we compared the number of multiplications and additions required for each method. According to the experiments, PSSP algorithm shows 64.8% computation reduction when compared with 250SVD+PDS while PSP shows 157% computation reduction.

• Investigative Magnetic Resonance Imaging
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• v.13 no.2
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• pp.137-145
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• 2009

Purpose : To compare 12 and 32-element surface coil arrays for highly accelerated coronary magnetic resonance angiography (MRA) using parallel imaging. Materials and Methods : Steady state free precession coronary MRA was performed in 5 healthy volunteers at 1.5 T whole body MR scanner using both 12 and 32-element surface coil arrays. Left anterior descending and right coronary artery data sets were acquired for each volunteer. Data sets were sub-sampled for parallel imaging using reduction factors from 1 to 6. Mean geometry factor (g-factor), maximum g-factor, and artifact level were calculated for each of the two coil arrays. Results : Over all reduction factors, the mean and maximum g-factors and artifact level were significantly reduced using the 32-element array compared to the 12element array (P << 0.1). The mean g-factor was sensitive to the imaging orientations of coronary arteries while the maximum g-factor and artifact level were independent of orientation. Conclusion : The 32-element surface coil array significantly improves artifact and noise suppression for highly accelerated coronary MRA using parallel imaging. The increased acceleration factors made feasible with the 32-element array offer the potential to enhance spatial resolution or increase volumetric coverage for 3D coronary MRA.

• Korean Journal of Veterinary Research
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• v.41 no.4
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• pp.477-484
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• 2001

The regional distribution and relative frequency of neurohormonal peptides-producing cells were demonstrated in the gut of the stomachless teleost, the Prussian carp, Carassius auratus Linnaeus, using 10 types of specific antisera raised against mammalian regulatory peptides. The gut of the Prussian carp was divided into five portions from proximal to distal (Segments I~V). Most of immunoreactive cells in the epithelial lining portion, between epithelial cells, were generally spherical or spindle shape having long cytoplasmic process that reached to the lumen (open typed cell) while cells showing round in shape (close typed cell) were found in the basal portions of epithelial lining occasionally. Somatostatin-, cholecystokinin (CCK)-8- and pancreatic polypeptide (PP)- immunoreactive cells were observed in this study. However, no serotonin-, glucagon-, chromogranin A-, secretin-, vasoactive intestinal peptide (VIP)-, substance P- and bombesin-immunoreactive cells were found. Somatostatin-immunoreactive cells were restricted to most proximal segments of the gut (Segment I) with rare frequency and CCK-8-immunoreactive cells were demonstrated in the proximal segments of the gut (Segments I and II) with a few to rare frequencies. In addition, pancreatic polypeptide-immunoreactive cells were demonstrated in the proximal to middle segments (Segments I~III) with moderated to rare frequencies. In conclusion, the distribution and relative frequency of these immunoreactive cells are well corresponded to the previous reports in stomachless teleost but somewhat peculiar patterns are also detected.

• Culinary science and hospitality research
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• v.17 no.3
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• pp.1-19
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• 2011

This study aims to analyze importance and performance factors on the quality of food service event attributes in participants and organizers, so that it could provide helpful information to build up a detailed marketing strategy and present considerations for revisit increase and more efficient business results as well. Importance on food service event attributes scored a higher level than performance on the whole. Notably, in regard to the attributes of food service event, it was found that respondents put higher stress on vessel(4.10 points), natural seasoning(4.06 points), reservation service(4.04 points), parking service(3.95 points), customer level(3.85 points), organizer's service (3.84 points), polished atmosphere (3.83 points) and taste of food (3.83 points) than anything else. In terms of IPA analysis on food service event attributes, it was important to continuously maintain 'vessel', 'reservation service', customer level', 'sauce taste', 'recency', price', 'chefs fame', etc. Some items such as 'parking service', 'natural seasoning', 'polished atmosphere', 'taste of food', 'see off service', 'cleanliness' are in need of intensive care and operation.

• Journal of Intelligence and Information Systems
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• v.15 no.1
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• pp.87-102
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• 2009

With the growth of Web 2.0, lots of services allow yours to post their personal information and useful knowledges on networked information spaces such as blogs and online communities etc. As the services are generalized, recent researches related to social network have gained momentum. However, most social network services do not support machine-processable semantic knowledge, so that the information cannot be shared and reused between different domains. Moreover, as explicit definitions of relationships between individual social entities do not be described, it is difficult to analyze social network for inferring unknown semantic relationships. To overcome these limitations, in this paper, we propose a social network analysis system with personal photographic data up-loaded by virtual community users. By using ontology, an informative connectivity between a face entity extracted from photo data and a person entity which already have social relationships was defined clearly and semantic social links were inferred with domain rules. Then the inferred links were provided to yours as a visualized graph. Based on the graph, more efficient social network analysis was achieved in online community.

• Cartoon and Animation Studies
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• s.23
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• pp.1-17
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• 2011

The paper analyzed the metaphoric expressions appeared in whose cinematic quality has been subjectively recognized on the global stage by winning the Oscar for Best Animated Short Film. Many contents and visual effects of the film were expressed with metaphor. Story and sequence were analyzed through the language system-based 'Conceptual Metaphor Analysis Framework'. In addition, characters have been analyzed through the 'Visual Metaphor Analysis Framework'. The framework is to analyze visual dimensions which are derived when concepts are structuredin animation. This paper has attempted to investigate and reveal patterns how animation self-organizes or how animation self-realizes through linguistic objectives. That is, it is to reveal how animation communicates with the audience from the metaphoric perspective among many conventional ones. In an animated film, metaphor is a fundamental means to connect fragmented images, produce a holistic view and therefore induce creative communication with the audience. The essential motive of metaphor which is expressed in various styles in is modern people's feeling of loss and sense of missing something. Train, bottle top, food, lost-and-found center, in-between space and lost items have significance across the movie. According to an analysis, metaphor offers simplicity and freshness as an aesthetic function. In addition, the metaphor expresses lengthy contents and various meanings implicitly, delivering an economic function. With a creative function, metaphor is a tool to generate new meanings. In other words, an animated film is a medium to inspire and move the general public as a means of communication and thinking, not just an entertainment for young generations. After all, metaphoric expressions have been used to deliver diverse and deep meanings in animated films.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.6
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• pp.3478-3489
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• 2014

Because the increased number of Internet users and the common use of IT technology via the expansion of domestic IT infrastructure have increased the web site use of companies, Internet users have begun to experience a range of online websites. In a digital environment, entrepreneurial companies who have limited resources will require effective management by analyzing the critical factors of the website quality assessment and focusing their resources to seize the market because the website quality built in the company directly affects the satisfaction and purchase activity of the customers. In this study, a total of 523 surveys from the customers visiting online websites of the entrepreneurial companies were collected to analyze the factors between the influencing factors and satisfaction and purchase intention using the ServQual method in the AMOS 18.0 program. This analysis showed that the customers visiting the website are satisfied with the factors of tangibility, reliability and responsiveness of visited websites, and the factor of community, which indicates that the level of customer activity in the web sites is related significantly to the customers' purchase intentions.