• Journal of the Korea Institute of Information and Communication Engineering
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• v.11 no.12
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• pp.2374-2381
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• 2007

.We have studied to obtain the properly conditions about impedance matching of the SAW filter for the SPUDT type and the bidirectional transducer type later. And we have studied to obtain the SAW filter for the Slanted Finger Interdigital Transducer(SFIT), was formed on the Langasite substrate and was evaporated by Aluminum-Copper alloy and then we performed computer-simulated by simulator In case the SPUDT, we have employed that the number of pairs of the input and output IDT are 50 pairs and the thickness and the width of reflector are $5000{\AA}$ and $3.6{\mu}m$, respectively. And the of the bidirectional transducer, the width of IDT' fingers and the space between IDT' finger and reflector is $1.8{\mu}m$, respectively. Also, we have performed to series connected the SPUDT type with the bidirectional transducer type filter. The frequency response of the fabricated SAW filter has the property that the center frequency is about 190MHz and bahdwidth at the 3dB is probably 5.3MHz after when we have matched impedance. Also, we could obtain that ripple characteristics is less than 0.3dB and insert loss is probably -20dB after when we have matched impedance.

• Korean Journal of Family Social Work
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• no.62
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• pp.5-38
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• 2018

This study explores experiences of male siblings without disability who are caring for their adult siblings with intellectual disability. To this end, in-depth interviews were conducted based on phenomenological qualitative research methods, and documents such as newspaper articles and broadcasting documentaries covering the care of participants were also used as materials. Data collection took place from August to October, 2017, and four brothers without disability participated in this study. Findings are presented as five themes: a sibling with a disability-centered life, living with complex emotions including emotional ambivalence, cautious life at all times, life to receive consolation, and life trying to achieve balance and harmony. Based on the results, political and practical considerations for brothers without disability and their families who support their adult siblings with intellectual disability are discussed. Implications for social workers are suggested.

• Journal of The Geomorphological Association of Korea
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• v.15 no.2
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• pp.1-9
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• 2008

This studied area is divided into the mountains and the valleys. The former is nearly consisted of the badland, the latter is consisted of alluvial plains in the valley, fluvial terrace at the side of the river, alluvial fans between mountains and river terrace. There are many tors, mushroom rocks, sugarloaves, weathering pits, castle coppies, columnar rocks, pinnacles, balanced rocks carved on tuff by means of erosion in the Chiricahua Nat'l Monument. Willcox Playa is alkalic crust where was lake in pleistocene epoch at the time wetter than present. Alkalic crust was made of Ca, Na, K etc. There are sand dunes around here where was lake side in the past. We found many kinds of fossils at the 2,000ft thick horizons of valley alluvium. Pediment and alluvium bordered at the base of Mt. Dragoon wavily. Exfoliation and spalling and sheeting resulted in boulders around here. Tucson is alluvial plain filled in thick 7,0000ft valley. Volcano, fault, erosion, alluvium were and are processing in this area.

• Korean Journal of Social Welfare Studies
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• no.36
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• pp.253-280
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• 2008

Previous research indicates that depressive symptoms and alcohol consumption are highly correlated with each other. However, there is lack of consensus on the causal relationship between depressive symptoms and alcohol use. In order to address this limitation, this paper examines causal relationship between the two variables using non-recursive structural equation modeling, controlling sociodemographic and psycho-socio-behavioral variables. Data included 14,469 community dwelling individuals who participated in Korea Welfare Panel Study in 2006. Results showed that the effects of alcohol consumption on depressive symptoms was statistically significant, whereas the effects of depressive symptoms on alcohol consumption was not. Significant portions of the effects of psycho-socio-behavioral variables on depressive symptoms were indirect through their effects on alcohol consumption. Based on the results, implications for intervention and future research were discussed.

• Korean Journal of Social Welfare Studies
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• v.45 no.3
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• pp.151-178
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• 2014

Highly Differentiated and segmented social insurance scheme in Taiwan shows its salient dimension of stratification, which has been considered as a general feature of conservative welfare regime. However, compared to Western conservative welfare states, Taiwan's social insurance scheme shows a distinct feature. First, Taiwan's social insurance scheme has offered a full coverage for various benefits. Secondly, Labor Insurance and Government employees' Insurance reveal distinct features of stratification. Labor Insurance has developed a universalistic system based on status equality and cross-class solidarity of working classes while Government employees' Insurance includes a myriad of occupational- and status-based programs. This article aims to articulate the historical origin of Taiwan's unique social insurance scheme and explains it as an unintended result of state's political intervention and various interests of each insured groups, especially, politically, economically, and ethnically conflicting identities of government employees and working classes.

• Journal of The Geomorphological Association of Korea
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• v.21 no.4
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• pp.133-147
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• 2014

Reducing the range of target landform, is required to save the time and cost before real field survey in the case of inaccessible landform such as talus. In this study, Weight of Evidence modeling, which is a Target-driven spatial analysis statistics methods, has been applied to reduce the field survey range of target landform. In order to apply the Weight of Evidence analysis, a likelihood ratio was calculated on the basis of the result of correlation analysis between geomorphic factors and GIS information after selection of geomorphic factors regarding talus. A best combination, which has the biggest possibility for Talus Potential Index, was found by using SRC and AUC methods after calculating the number of cases for each thematic maps. This combination which includes aspect, geology, slope, land-cover, soil depth and soil drainage factors, showed quite high accuracy by 74.47% indicating the ratio of real existent talus to potential talus distribution.

• Journal of Korean Philosophical Society
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• v.144
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• pp.235-256
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• 2017

This essay considers Leibniz-Clark correspondence on the nature of space and hole argument. The ontology of space had been debated under the name of substantivalism-relationism controversy. The debates between the two parties are concerned with the nature of existence of parts of space-time. Substantivalism claims that the point of space-time has existence analogous to that of material substance. Relationism argues that space-time should be understood as the framework of possible spatio-temporal relations between bodies. Although these two approaches attempt to respect theoretical context, it seems that the problems of these two interpretive schemes stems from the lack of understanding of the structure of space-time theories, especially how space-time is connected with the laws of motion. In order to appreciate the substance-relation controversy without deviating from the context of space-time theories, it is necessary then to capture how space-time theories are constituted. This essay offers the clear connection of ontology of space-time with present practices of theoretical physicists.

• Journal of the Korea Convergence Society
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• v.10 no.11
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• pp.283-288
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• 2019

This study investigated how consumer's uncertainty avoidance affect purchase deferral intention when purchasing high-involved products (i.e. laptops) in online shopping, and we looked at whether utilitarian/hedonic consumption value has a moderating effect in this relationship. Results showed the higher the uncertainty avoidance, the higher the deferral intention. Also, only the utilitarian consumption value had moderating effect in this relationship. This means that in an information overload situation like online shopping, consumers are more likely to delay their purchase intention when they have more uncertainty avoidance. Thus, to prevent this purchase delay, marketers should selectively present relative product information, strategically emphasize the importance of certain product attribution to reduce consumers' uncertainty of the product or highlight the utilitarian values of product attributes that are expected to have a significant impact on decision making.

• Proceedings of the Korea Water Resources Association Conference
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• 2016.05a
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• pp.359-359
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• 2016

본 연구에서는 최근 기후변화에 따른 가뭄으로 어려움을 겪고 있는 충청남도 서부권의 물 부족을 해결하기 위하여 금강 본류로부터 보령댐으로 일정 유량을 도수(diversion)하는 계획이 금강 본류에 미치는 수리적 영향을 검토하였으며 특히 금강 본류의 농공용수 취수에 제한을 초래할 수 도 있는 수위에 미치는 영향을 중심으로 분석하였다. 본 연구의 공간적 범위는 금강 하굿둑으로부터 하류 외해 방향으로 약 9km 지점에 위치한 금강 하구로부터 상류 방향으로는 금강 하굿둑으로부터 약 76km 지점에 위치한 공주시 반포면 검상동의 검상천 합류지점까지 총 85km에 이르는 구간에 대한 1차원 수리 모형을 구축하였으며, 시간적 범위는 보령댐으로의 도수가 갈수기에 이루어지는 것으로 가정하여 2015년 2월 1일부터 5월 31일까지 진두수위표의 시간별 유량과 8개 지천의 유입 유량, 장항검조소의 시간별 조위, 농공용수 취수시설 취수량 및 회귀수, 금강 배수갑문 운영 등을 고려하여 모형의 보정을 실시하였고, 유황분석에 따른 2016년 갈수기 예측 유량을 추정하여 보령댐으로의 도수에 따라 금강 본류 내 주요 구간의 수위에 미치는 영향을 분석하고자 하였으며, 서해안 조위에 따른 금강하굿둑 배수갑문의 운영에 직접적인 영향을 받는 배수위 구간임을 감안하여 비정상류 해석(unsteady flow analysis)을 수행하였다. 갈수기 예측 유량 추정 결과 2015년과 같은 가뭄이 지속될 경우, 2016년의 유황은 2015년 대비 21%로 분석되었으며 이는 보령댐 도수 여부에 관계없이 물 부족이 발생할 수 있는 상태인 것으로 분석되었고, 하천유지유량 정도의 유황이 유지되는 상태에서 보령댐으로 도수를 실시할 경우, 도수시 금강호 최저 수위는 각각 EL(+)0.94m와 EL(+)0.72m로 모의되어 농업용수를 비롯한 기존 취수시설 뿐만 아니라 보령댐 도수시설의 운영에도 어려움이 생길 것으로 예상되었다. 2016년 갈수기 동안 과업 대상 구간인 금강 하류부의 유황은 농업용수 취수가 본격화되기 이전인 2월에는 하천유지유량 정도의 유황을 유지하는데 별 어려움이 없지만 3월 이후농업용수 취수가 본격화되면 농업용수 취수시설이 집중된 입포수위표 ~ 금강 하굿둑 사이 구간은 하천유지유량 이하로 유량이 크게 감소할 것으로 예상되었다.

• Proceedings of the Korea Water Resources Association Conference
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• 2016.05a
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• pp.326-326
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• 2016

The fault can be defined, in a geological context, as a rupture plane showing a significant displacement generated in the case that the local tectonic stress exceeds a threshold of rupture along a particular plane in a rock mass. The hydrogeological properties of this fault can be varied with the spatial distribution and the connectivity of void spaces in a fault. When the formation of fault includes the process of the creation and the destruction of void spaces, a complex relation between the displacement along the fault and the variation of void spaces. In this study, the variation of flow with the geometrical characteristics of the fault is simulated and analyzed by using the three-dimensional discrete fracture network model. Three different geometrical characteristics of the faults are considered in this study: 1) simple hydraulic conductive plane, 2) damaged zone, and 3) relay structure of faults.