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        • KCI등재

          Novel three-dimensional position analysis of the mandibular foramen in patients with skeletal class III mandibular prognathism

          강상훈,김연호,원유진,김문기 대한영상치의학회 2016 Imaging Science in Dentistry Vol.46 No.2

          Purpose: To analyze the relative position of the mandibular foramina (MnFs) in patients diagnosed with skeletal class III malocclusion. Materials and Methods: Computed tomography (CT) images were collected from 85 patients. The vertical lengths of each anatomic point from the five horizontal planes passing through the MnF were measured at the coronoid process, sigmoid notch, condyle, and the gonion. The distance from the anterior ramus point to the posterior ramus point on the five horizontal planes was designated the anteroposterior horizontal distance of the ramus for each plane. The perpendicular distance from each anterior ramus point to each vertical plane through the MnF was designated the horizontal distance from the anterior ramus to the MnF. The horizontal and vertical positions were examined by regression analysis. Results: Regression analysis showed the heights of the coronoid process, sigmoid notch, and condyle for the five horizontal planes were significantly related to the height of the MnF, with the highest significance associated with the MnF-mandibular plane (coefficients of determination (R2): 0.424, 0.597, and 0.604, respectively). The horizontal anteroposterior length of the ramus and the distance from the anterior ramus point to the MnF were significant by regression analysis. Conclusion: The relative position of the MnF was significantly related to the vertical heights of the sigmoid notch, coronoid process, and condyle as well as to the horizontal anteroposterior length of the ascending ramus. These findings should be clinically useful for patients with skeletal class III mandibular prognathism.

        • KCI등재

          Modeling and Forecasting the Volatility of Eastern European Emerging Markets

          강상훈,윤성민 대외경제정책연구원 2009 East Asian Economic Review Vol.13 No.1

          This study has attempted to seek a volatility forecasting model that can reflect sufficiently the long memory characteristic in the volatility of four Eastern European emerging stock markets, namely, Hungary, Poland, Russia, and Slovakia. From the results of our empirical analysis, we found that the FIGARCH model is better equipped to capture the long memory property in the volatility of these markets than the GARCH and IGARCH models. More importantly, the FIGARCH model is found to provide superior performance in one-day-ahead volatility forecasts. Thus, this study recommends researchers, portfolio managers, and traders to use the long memory FIGARCH model in analyzing and forecasting the volatility dynamics of Eastern European emerging markets.

        • KCI등재

          60-70년대 프랑스 파리의 근대건축 형성에서 사회학 연구와 아방가르드 유토피아의 의미

          강상훈 대한건축학회 2015 대한건축학회논문집 Vol.31 No.1

          A diagnosis of negative view about the 20th century architecture in Paris, France may be newly evaluated in the 60s and 70s. During that period, accompanied by the advent of the notion of collective memory from which the social shape of the past has been revealed, social studies on architecture and urbanism played a dominant role to make it possible for a new architectural disposition to emerge to struggle against the process of urbanization which preceded the industrialization. At the same time, the avant-garde utopian conception was formed as another critical architectural disposition corresponding to specific practices based on 19th century's utopian movements. These two phenomena embraced the generation of two predominant architectural dispositions, the ‘urban architecture' and ‘subterranean urban architecture', respectively, which account for the architecture and urbanism of the 60s and 70s. It is understood therefore that, in light of these aspects, two architectural and urban phenomena constituted positive factors for establishing a new image for Paris imparting a significant meaning to the modern architecture in Paris, France.

        • KCI등재

          프랑스 파리 레 알(Les Halles) 재개발에 관한 연구 : 도시공간의 ‘내부화'와 ‘지하화'

          강상훈 대한건축학회 2012 대한건축학회논문집 Vol.28 No.3

          Used to be no-man's land for ten years in the mid-twentieth century in Paris, France, les Halles is a place that reflects many architectural and urban histories of the capital of France. The decision made by Baron Haussmann to create a new wholesale food market in the les Halles area reaching its peak in the nineteenth century was understood as an opportunity to redevelop this historic area with the construction of twelve cast-iron and glass pavilions which provided the area with its unique character. With the fast growth of commercial activity in the mid-twentieth century, the expansion plan was undertaken to move the market to the suburb of Paris. However, it was not until the 1960s that serious planning policies were discussed concerning what to do with the les Halles. Due to lack of appropriate redevelopment frameworks and to complicated process related to political, economical, social, and cultural aspect in French society, many comprehensive proposals, conducted by architects, urban planners, artists, politicians and even the President of the Republic, were not really implemented. Based on the objectives infinitely debated, the redevelopment plan was finally settled up, covering specific policy-areas including underground transport, RER and metro system, the creation of the Forum, major commercial projects, housing and social facilities. The redevelopment plan of the twenty-first century seems another version of the endless struggles that have been experienced before, trying to implant a new idealistic life for the les Halles of the new century. In a series of redevelopment plans proposed, it is interesting to recognize that the character of les Halles was closely related to two distinct urban development phenomena called ‘interiorization' and ‘subterranean development' of urban space which were dominated in the extraordinarily complicated process undertaken in the nineteenth throughout the twenty-first century. The ‘interiorization' of urban space signifies a utopian vision of Haussmann with regard to a new emphasis on the interior during the Second Empire(1852-1870) when the Bourgeois manifested their identity as the liberated partisans of new ideas and new urban life. The ‘subterranean development' of urban space was represented by the underground schemes of, notably, Edouard Utudjian, directly connected to the emergence of fantastical avant-garde French utopianism of spatial, urban culture of the sixties. Here the study attempts to understand the relationship between the urban redevelopment plans of les Halles and urban phenomena or culture that spans from the mid-nineteenth to the twenty-first century. This will be investigated by, first, tracing the general history of les Halles; second, understanding two urban development phenomena manifested in architectural, urban practice and urban literature concerning the characteristics of the redevelopment of les Halles. Then, the study will try to show that both of these urban phenomena were one veritable thresholds of modernity in architectural and urban history in France, generating a unique parisien life style.

        • KCI등재후보

          인체 환경 연구를 위한 한약재, 작업장 공기 및 모발의 원소분석

          강상훈,이상순,조승연,정용삼 한국환경보건학회 2002 한국환경보건학회지 Vol.28 No.3

          '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

          Hair provides important information about the body s mineral status. Therefore, we have studied the trace elemental distribution in human hair under different inhalation and ingestion environment using neutron activation analysis (NAA). NAA is a powerful analytical method which can be used successfully to determine trace elements in environmental and biological materials. Total diet and six different herbal medicine were analysed to study ingestion environment. Airborne dust in foundry was analysed and compared with outdoor dust to study inhalation environment. Human hairs of common person, herbal medicine taker and foundry worker were analysed to estimate the trace elemental distribution of people under different inhalation and ingestion environment. Analytical results show that herbal medicines contain higher micronutrients such as Ca, Mg, Mn and Cu that total diet and airborne dust in foundry has high Cr. The concentration of Ca, Mg and Mn in hair of herbal medicine taker is two times higher than in hair of common person and Cr con-centration in hair of foundry worker is about three times higher than in hair of common person. These results show that NAA can be used importantly to monitor human health through biological and environmental samples.

        • KCI등재

          Analyzing the Time-Frequency Lead-Lag Relationship between Bitcoin and Currencies Markets

          강상훈 한국자료분석학회 2019 Journal of the Korean Data Analysis Society Vol.21 No.1

          '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

          This study examines the co-movement and lead-lag casuality relationship between the bitcoin and five currencies using wavelet methods. This study focuses on the dependence and casuality relationships in different time scales (short-term, intermediate-term, and long-term scales). The wavelet method results provide three implications: (1) The continuos wavelet power analysis shows that bitcoin returns has a high power in the short and intermediate-term scales over the period from mid-2011 to 2014. (2) The cross wavelet power transformation indicates the strong covariances between bitcoin and currency returns over the periods from mid-2011 to 2014, and this covariance decayed. (3) The wavelet coherence results identify a high level of co-movement between the bitcoin and currency returns at intermediate and long-term scales and bitcoin leading CNY, JPY, and USDX (as arrows approach to the right and up) over periods 2017-2018. Therefore, we find the co-movement and lead-lag causability relationships between bitcoin and currency markets.

        • KCI등재

          The Impacts of Sudden Changes on the Volatility Persistence in Global Volatility Index

          강상훈,윤성민 한국자료분석학회 2015 Journal of the Korean Data Analysis Society Vol.17 No.2

          '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

          The volatility is affected substantially by infrequent sudden changes or regime shifts, corresponding to domestic and global economic events. This study considers the impact of sudden changes on volatility index (VIX) and examines the persistence of VIX. This study employs an iterated cumulative sums of squares (ICSS) algorithm to identify the time points at which sudden changes in volatility have occurred, and the results are incorporated into the AR-GARCH framework with and without sudden change variables. This study considers CBOE VIX time series. The sample data set consists of the weekly closing prices spanning from January 3, 2003 to September 28, 2012. According to empirical results, we find two sudden changes corresponding the 2008 global financial crisis. In addition, our results indicate that the degree of persistence of volatility was reduced by incorporating these sudden change effects into the GARCH model. These finding suggests that the importance of unexpected news associated with sudden changes evaluates more accurate volatility and provides the development of advance volatility models in financial assets.

        • KCI등재

          Volatility Transmission between Commodity and Stock Markets: Evidence from the Korean Stock Market

          강상훈,윤성민 한국자료분석학회 2015 Journal of the Korean Data Analysis Society Vol.17 No.4

          '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

          This study investigated the volatility transmission between commodity futures (gold and crude oil) and Korean stock markets. To examine volatility transmission, we utilized the trivariate AR-DCC-GARCH model and weekly closing price index series from 2 January 1998 to 20 January 2015. We also considered the potential impacts of structural breaks on the volatility of these markets using the modified ICSS algorithm, and calculated optimal portfolio weights and hedge ratios using the estimated conditional covariances between commodity futures and Korean stock returns. The result revealed significant volatility transmission between two markets. In particular, we found significant variability in the time-varying conditional correlations between the considered markets during both bull and bearish markets, particularly from early 2007 to summer 2008. We analyzed the optimal portfolio weights and time-varying hedge ratios based on estimates of the trivariate AR-DCC-GARCH model. These findings are of practical importance to portfolio investors and may be useful for making optimal portfolio allocation decisions and developing cross-market hedging strategies.

        • KCI등재

          역사문화유적지 방문 유형별 전략과 방문객의 특성

          강상훈 (사)한국관광레저학회 2018 관광레저연구 Vol.30 No.5

          This study classified the types of strategies for visiting historical cultural heritage sites(HCHSs), and examined associations between the types and visitors' characteristics such as demographic and socio-economic characteristics. Of the raw data from the 2016 The Survey of Cultural Enjoyment, this study analyzed respondents' data who reside in Gyeonggi Province, South Korea. A series of the Chi-square test and the ANOVA were performed. Findings reveal that there were significant associations between the types of strategies for visiting HCHSs and respondents' demographic and socio-economic characteristics. However, there were no significant differences in respondents' age among the types of strategies for visiting HCHSs. Based on the findings, theoretical and practical implications are discussed to better understand visitors' behavior visiting HCHSs as well as implement competitive regional tourism policies and strategies using HCHSs.

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