• ETRI Journal
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• 제35권6호
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• pp.1011-1020
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• 2013

In this paper, we present a method for obtaining a high-quality 3D depth. The advantages of active pattern projection and passive stereo matching are combined and a system is established. A diffractive optical element (DOE) is developed to project the active pattern. Cross guidance (CG) and auto guidance (AG) are proposed to perform the passive stereo matching in a stereo image in which a DOE pattern is projected. When obtaining the image, the CG emits a DOE pattern periodically and consecutively receives the original and pattern images. In addition, stereo matching is performed using these images. The AG projects the DOE pattern continuously. It conducts cost aggregation, and the image is restored through the process of removing the pattern from the pattern image. The ground truth is generated to estimate the optimal parameter among various stereo matching algorithms. Using the ground truth, the optimal parameter is estimated and the cost computation and aggregation algorithm are selected. The depth is calculated and bad-pixel errors make up 4.45% of the non-occlusion area.

• 수산해양교육연구
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• 제24권5호
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• pp.687-698
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• 2012

This study investigates the level of elementary school parents' satisfaction and recognition on the education gap between the eastern and western part of the Busan Metropolitan City. The gist of the discussion centers on the equal educational opportunities of the schooling, non-schooling. To accomplish this research, we practice the questionaries about the education development in Busan to 234 parents who reside in the eastern and western part in Busan. The results of survey are as follows. First of all, there is a broad distinction between the two area about parents' attitude towards children. Second, the results of schooling satisfaction are higher in eastern Busan area. Third, the parents of eastern part also show their satisfaction of schooling support. The results indicate that nation and local government must develop the short and long range plan for students from low-income families.

• 한국정밀공학회지
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• 제27권3호
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• pp.18-26
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• 2010

Diffraction gratings with precise spatial periods of 2 ${\mu}m$ and 5 ${\mu}m$ have been fabricated by using a femtosecond laser which does not have limits on materials of micromachining and small thermal effects due to high peak power. Diffraction angle and diffraction efficiency of those were measured. Simulation results of diffraction angle and diffraction efficiency of the diffraction grating calculated with the parameters such as line width, depth, and spatial period of the fabricated gratings were compared with experimental results measured with a He-Ne laser. Besides these, Fresnel Zone Plates (FZPs) with focal distances of 50 mm and 25 mm were fabricated and focal distances of fabricated FZP were measured. Those experimental results for diffraction gratings and FZPs match well with experimental results.

• 한국HCI학회논문지
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• 제1권1호
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• pp.9-20
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• 2006

This paper describes a framework for multimodal object manipulation in virtual environments. The gist of the proposed framework is the semantic integration of multimodal input using spatial ontology and user context to integrate the interpretation results from the inputs into a single one. The spatial ontology, describing the spatial relationships between objects, is used together with the current user context to solve ambiguities coming from the user's commands. These commands are used to reposition the objects in the virtual environments. We discuss how the spatial ontology is defined and used to assist the user to perform object placements in the virtual environment as it will be in the real world.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2009년도 IWAIT
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• pp.294-297
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• 2009

Multi-view video consists of a set of multiple video sequences from multiple viewpoints or view directions in the same scene. It contains extremely a large amount of data and some extra information to be stored or transmitted to the user. This paper presents inter-view correlations among video objects and the background to reduce the prediction complexity while achieving a high coding efficiency in multi-view video coding. Our proposed algorism is based on object-based segmentation scheme that utilizes video object information obtained from the coded base view. This set of data help us to predict disparity vectors and motion vectors in enhancement views by employing object registration, which leads to high compression and low-complexity coding scheme for enhancement views. An experimental results show that the superiority can provide an improvement of PSNR gain 2.5.3 dB compared to the simulcast.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2014년도 제46회 동계 정기학술대회 초록집
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• pp.103.1-103.1
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• 2014

Due to their excellent optical and electrochemical properties, conjugated polymers have attracted much attention over the last two decades and employed to opto-electrical devices. In particular, conjugated polymers possess many attractive features that make them suitable for a variety of sensing task. For example, their delocalized electronic structures can be strongly modified by varying the surrounding environment, which significantly affected molecular energy level. In other word, conjugated polymers can detect and transduce the environmental information into a fluorescence signal. Conjugated polymers also display amplified quenching compared to small molecule counterparts. This amplified fluorescence quenching is attributed to the delocalization and migration of the excitons along the conjugated polymer backbones. Long backbones of conjugated polymer provide the transporting path for electron as a conduit, allowing that excitons migrate rapidly into quencher site along the backbone. This is often referred to as the molecular wire effect or antenna effect. Moreover, structures of conjugated polymers can be easily tailored to adjust solubility, absorption/emission properties, and regulation of electron/energy transfer. Based on this versatility, conjugated polymers have been utilized to many novel sensory platforms as a promising material. In this tutorial, I will highlight a variety of fluorescence sensors base on conjugated polymer and explain their sensory mechanism together with selected examples from reference literatures.

• Journal of Communications and Networks
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• 제13권3호
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• pp.286-297
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• 2011

A novel converged optical network unit (ONU)-base station (BS) architecture has been contemplated for next-generation optical-wireless networks. It has been demonstrated through high quality studies that data traffic carried by both wired and wireless networks exhibit self-similar and long range dependent characteristics; attributes that classical teletraffic theory based on simplistic Poisson models fail to capture. Therefore, in order to apprehend the proposed converged architecture and to reinforce the provisioning of tightly bound quality of service (QoS) parameters to end-users, we substantiate the analysis of the QoS behavior of the ONU-BS under self-similar and long range dependent traffic conditions using custom queuing which is a common queuing discipline. This paper extends our previous work on priority queuing and brings novelty in terms of presenting performance analysis of the converged ONU-BS under realistic traffic load conditions. Further, the presented analysis can be used as a network planning and optimization tool to select the most robust and appropriate queuing discipline for the ONU-BS relevant to the QoS requirements of different applications.

• 한국문헌정보학회지
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• 제10권
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• pp.121-148
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• 1983

This study deals with and brings light on the classification system of Kyochangchongrok Kyongba((敎藏總錄 經部) Concerning the Euichon(義天)'s catalogue, Ohya(大屋德城) pointed out in 1937 that its classification system was different from that of the Kaewon Sokkyorok Yakchul(開元釋敎錄略出), and the system was not based on the diverse divisions of doctrines, such as Chontae(天台) or Whaom(華嚴). He went on to contend that the system, therefore, had no working rules, and was disorder as a corollary. The present writer, however, firmly convinced that Euichon must have had some criteria and order in editing the Catalogue on the basis of the commentaries which he had collected in 20 years, examined the catalogue by analyzing the classification system of sutra, vinaya and philosophy, thereby reclassifying them as divisions of doctrines like Wonhyo(元曉), Chontae(天台) and Hyonsu(賢首). As a result, the present writer disclosed that Euichon's Clataogue was edited in conformity with some criteria. For it was edited according tothe order of his teachings and meditations; complete combination of dharma, gist of final teachings, sermons of Hinavana Buddhism. Furthermore, it was clarified that he logically organized the system since he, concerning the sub-system, synthetically applied the reverse of the order which was illustrated in the diverse divisions of doctrines of 'Wonhyo', etc. consequently arranging and connecting the doctrines respectivelly. The significance of this treatise can, therefore, read as follows; to prove the Euichon's Catalogue was complied reasonably and logically on the basis of standing criterion.

• 가정과삶의질연구
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• 제32권5호
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• pp.63-86
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• 2014

The present study aims to phenomenologically investigate the adaptation experiences of Vietnamese immigrant women, with in the sociocultural context of their native country. In-depth interviews with a total of seven Vietnamese immigrant women were analyzed by the phenomenological method of A. Giorgi(1997). A total of 127 meaning units and 7 themes with 17 sub-themes, which rendered central meanings that indicated situational structures, were derived. The statements of situational structures were re-categorized in accordance with the sociocultural context of their native country. As the socioeconomic aspect, "aspiration for new opportunities and a new world" and "disappointment and frustration" were derived. The aspect of familial value and culture involved "conflicts over the unilateral acceptance of differences" and "building social relationships". The aspect of female status was associated with "conflicts due to patriarchal hierarchy". The aspect of child caring involved "education as a symbolic value" and the "double-sidedness of mother identity strategy". The gist of Vietnamese immigrant women's adaptation experiences is "to grow into a subjective mother despite conflicts due to the disappointment and frustration behind aspirations".

• 말소리와 음성과학
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• 제3권3호
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• pp.19-26
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• 2011

Previous laboratory studies have shown that prosodic structures are encoded in the modulations of phonetic patterns of speech including suprasegmental as well as segmental features. Drawing on a prosodically annotated large-scale speech data from the Buckeye corpus of conversational speech of American English, the current study first evaluated the reliability of prosody annotation by a large number of ordinary listeners and later examined whether and how prosodic prominence influences the phonetic realization of multiple acoustic parameters in everyday conversational speech. The results showed that all the measures of acoustic parameters including pitch, loudness, duration, and spectral balance are increased when heard as prominent. These findings suggest that prosodic prominence enhances the phonetic characteristics of the acoustic parameters. The results also showed that the degree of phonetic enhancement vary depending on the types of the acoustic parameters. With respect to the formant structure, the findings from the present study more consistently support Sonority Expansion Hypothesis than Hyperarticulation Hypothesis, showing that the lexically stressed vowels are hyperarticulated only when hyperarticulation does not interfere with sonority expansion. Taken all into account, the present study showed that prosodic prominence modulates the phonetic realization of the acoustic parameters to the direction of the phonetic strengthening in everyday conversational speech and ordinary listeners are attentive to such phonetic variation associated with prosody in speech perception. However, the present study also showed that in everyday conversational speech there is no single dominant acoustic measure signaling prosodic prominence and listeners must attend to such small acoustic variation or integrate acoustic information from multiple acoustic parameters in prosody perception.