• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.12 no.2
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• pp.165-175
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• 2001

In this paper, it is analyzed lumped element isolators analytically by the analysis program using scattering matrixes including ferrite saturation magnetization, external direct current magnetic field and strip line length and width, designed and experimented the small isolator of mobile phone. The simulation results show that the characteristics of the isolator are affected by external R, C, length and width of strip line and ferrite width and saturation magnetization sensitivity. We proposed the isolator specification applied cellular and PCS mobile phones, experimented the isolator for cellular mobile phones. From the experimented result, isolation and return loss are measured below 20 dB, insertion loss is below 0.7 dB, bandwidth is about 44 MHz at center frequency 836.5 KHz. The implemented isolator has better performances than the conventional one.

• Journal of Korea Game Society
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• v.9 no.6
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• pp.139-150
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• 2009

The abolition of WIPI installation duty makes domestic WIPI developers get a chance to enter into smartphone development environment. Specially, iPhone has a big possibility for a new game application market but traditional domestic WIPI developers have difficulties to get in because there are no standard game development methodology. Therefore, a method is necessary to develop iPhone game application effectively for traditional domestic WIPI developers. In this paper, we compare and analyze development methodology of WIPI and iPhone application and suggest a new methodology for iPhone application development with adaptation of WIPI architectures. Using this methodology, traditional domestic WIPI developers can develop iPhone game applications with ease.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2015.05a
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• pp.176-177
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• 2015

최근 자연계에 존재하는 광학 구조체를 모사하여 우수한 반사 방지 효과를 표면에 구현하고자 하는 연구가 이루어지고 있으며, 특히 우수한 무반사 특성을 가지고 있는 나방의 눈 구조를 모사하여 응용하고자 하는 연구가 활발히 진행되고 있다. 하지만, 주로 폴리머를 기판으로 하여 구현되는 모스아이 구조의 필름은 기계적 성질이 좋지 않아 문제가 되고 있다. 따라서, 본 연구에서는 모스아이 나노구조가 형성된 폴리머 기판에 비해 기계적 물성이 우수한 $Al_2O_3$ 물질을 적용하여, 모스아이 패턴의 기계적 특성을 향상 시키면서도, 모스아이 패턴이 가지는 고유의 우수한 광학적 성질을 유지시키기 위한 실험을 진행하였다. 모스아이 패턴의 광학적 성질을 유지하기 위해서는 나노구조 돌기상에 위치에 따른 두께 차이가 최소화된 균일한 코팅층을 형성하여 그 구조를 유지시킬 필요가 있으므로 이러한 구조물상에 단차피복성(Step Coverage)이 우수하고 sub-nm 단위의 정밀한 두께 조절이 용이한 원자층 증착법(Atomic layer deposition, ALD)을 이용하여 박막을 증착하였다.

• Journal of Korean Ophthalmic Optics Society
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• v.17 no.1
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• pp.83-89
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• 2012

Purpose: This article was to study the optical and surface properties of soft contact lenses (SCL) exposed to eye make-ups. Methods: Rates of the light transmission of etafilcon A (HEMA based hydrogel lens) and lotrafilcon B (silicone based hydrogel lens) exposed to four different cosmetics over time were investigated. After cleansed with multi-purpose solution (MPS), rates of the light transmission and surface change of lens that were exposed to the cosmetics for 7 consecutive days were analyzed. Results: Visible light transmissions of all lenses exposed to cosmetics decreased to 93.35% (HEMA based hydrogel lens) and 90% (silicone based hydrogel lens) compared with those of the fresh SCLs, such as 97.8% and 96.4%, respectively. It was found that cosmetic residues from powder eye shadow and mascara attached to the lenses were not removed completely when cleansed with MPS. Especially with silicone based hydrogel lens, we found a decrease in visible light transmission of the lens and noticeable particles on lens surface imaged by SEM. Conclusions: Depending on types of eye make-ups and contact lens materials, make-ups were not completely eliminated with current cleansing methods and that caused a decrease in optical property and a change in surface property of the lenses.

• Korean Journal of Culture and Social Issue
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• v.8 no.2
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• pp.51-76
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• 2002

Using open-ended questionnaires, two studies were conducted to explore social representations held by Korean undergraduates on children, adults and adolescents. Study 1 compared between children and adults with responses reported by 97 undergraduates(men: 28, women: 69). According to the results, characteristics of children distinctive from adults were basically personality-related and in particular, typical children were marked by high extroversion, low agreeableness, conscientiousness and culture. Further, happiness for both children and adults was determined mainly by interpersonal relationships, physical health and socio-economical status. However, good(or desirable) children characteristic of high agreeableness and conscientiousness were more similar to adults worthy of the name than to children worthy of the name. Using 57 undergraduates(men: 16, women: 41), Study 2 explored social representations of adolescents. The results indicated that overall adolescence were on the bridging state between childhood and adulthood. Happiness for adolescents, like both children and adults, was determined mainly by interpersonal relationships and socio-economical status. Finally, agreeableness, conscientiousness, self-, task- and relationship-related characteristics were involved in judging good(or desirable) adolescents. These findings were discussed in terms of features of Korean culture and human development.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.05a
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• pp.59-60
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• 2018

In this paper, we studied a design method for a band-pass waveguide filter with a modified H-type resonant iris (RI) placed in a thin transverse wall of a rectangular waveguide. The horizontal straight gap at the center of a conventional H-shaped iris is modified to a U-shaped one to increase the equivalent capacitance, and the equivalent inductance is improved by changing the vertical two straight slots into C-shaped ones. A third-order band pass filter using the proposed modified H-shaped iris was designed and, it was observed that the filter operated in the frequency range of 9.22-9.75 GHz with its insertion loss of 0.5 dB and return loss of 17 dB.

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.41 no.5
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• pp.185-192
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• 2004

This paper presents face recognition using vector quantization in the eigenspace of the faces. The existing eigenface method is not enough for representing the variations of faces. For making up for its defects, the proposed method use a clustering of feature vectors by vector quantization in eigenspace of the faces. In the trainning stage, the face images are transformed the points in the eigenspace by eigeface(eigenvetor) and we represent a set of points for each people as the centroids of vector quantizer. In the recognition stage, the vector quantizer finds the centroid having the minimum quantization error between feature vector of input image and centriods of database. The experiments are performed by 600 faces in Faces94 database. The existing eigenface method has minimum 64 miss-recognition and the proposed method has minimum 20 miss-recognition when we use 4 codevectors. In conclusion, the proposed method is a effective method that improves recognition rate through overcoming the variation of faces.

• The Journal of the Korea Contents Association
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• v.15 no.6
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• pp.157-167
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• 2015

This research studied how idol music popularity influences on equilibrium of ecosystem in Korean popular music market. Because most of media & press reported that idol music caused unbalance of whole market so this research issued it. Research method is borrowed production of cultural perspective of Peterson and subject of analysis is selected idol music from Melon weekly music chart(2000-2014), which is No. 1 digital music distributor. The result showed idol music did not bring unbalance of ecosystem structure in Korean polular music market and found it contributed diversity of music genre in music market by introducing various musical style all the more. This kind of untested information should not cause idol music production leading new Korean Wave to shrink. Government related organization has to do policy making based on verified fact in future and it should be handled as important matter for sustainable and expansive reproduction of Korean wave.

• Cartoon and Animation Studies
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• s.36
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• pp.1-17
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• 2014

The purpose of this study was to identify ironic characteristics that appear through ironic reversal in formal aspect and foreshadow structure examined through the progression stage of irony within the narrative structure in contents aspect. This study is intended to research how ironic expressions is embedded in latest full-length animation created by major animation production companies in America, such as PDI Dreamworks and Pixar. As identified in this study, the irony can be defined into two categories. First, Irony appears dramatically in a last scene through the process of prediction and implication after setting up a situation. It delivers laughter as it is mainly used to portray characters or to set up backgrounds for incidents. Secondly, foreshadow that appeared in the early part of animation in relation to irony was revealed with a surprising twist with the cause-and-effect relationship in the middle or end of the play. The irony strengthens dramatic elements and was used to make the story richer. By analyzing two american full-length animation films, various consecutive ironic expressions in narrative, which is the reversal irony in continuous scene or irony used with foreshadow were identified.

• FLOWER RESEARCH JOURNAL
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• v.18 no.3
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• pp.151-156
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• 2010

The Objective of this study was to investigate the effect of ethylene exposure and silver thiosulfate (STS) on flower senescence and vase life of cut iris (Iris hollandica). Cut iris flowers were pretreated in 1 mM STS solution for 30 minutes and exposed to 0, $3mL{\cdot}L^{-1}$ethylene for 24 hours. The vase life of iris treated at a bud stage was showed day 4.2 by exposure to $3mL{\cdot}L^{-1}$ ethylene and day 4.6 by exposure to $0mL{\cdot}L^{-1}$ ethylene. The pulsing of STS increased vase life of iris treated at a half-open stage. But, the vase life of iris was not affected by exposure to ethylene. Therefore, iris flowers were not sensitive to ethylene exposure. Iris flowers harvested at a bud stage do not progress to fully open flowers and then show flower senescnce, the optimum harvest stage seems to be a stage when flowers are open to some degree.