• 응용통계연구
• /
• 제31권2호
• /
• pp.205-216
• /
• 2018

본 논문에서는 모형 기반 GARCH 변동성, 실현변동성(realized volatility; RV), 역사적 변동성(historical volatility), 지수가중이동평균(exponentially weighted moving average; EWMA) 등 다양한 변동성 추정 방법을 소개하고, 실현변동성에 비대칭 효과(leverage effect)를 반영한 분계점 실현변동성(threshold-asymmetric realized volatility; T-RV)을 제안하였다. 또한, 예시를 위해 KOSPI 고빈도 수익률 자료의 변동성을 분석하였다.

• 혜화의학회지
• /
• 제24권2호
• /
• pp.25-34
• /
• 2016

Objectives : Historical study on application of Kyungohkgo, one of the most popular tonic medicine, and suggestion of modernistic method through it Methods : Investigated effect and its range of Kyungohkgo in original texts of Korean medicine, and researched studies on medical action and treatment effect of Kyungohkgo nowaday. Results : Kyungohkgo has "replenish essence and marrow(補精益髓)" as a major effect, and various original text suggested that Kyungohkgo can be used as antioxidant tonic medicine, treatment of respiratory disease like tuberculosis and medicine for bone disease controling hormone. Several research about these subjects has been progressed recently. However, the most of these researches is not an in-depth study about virtues in original texts, but deduced from effects of Kyungohkgo, and there are some studies experimented with Kyungohkgo that has not followed its own formula. Conclusions : It is required to discuss new application based on understanding effect and is range of Kyungohkgo. It could be thought that using for skin disease based on t theory of "lung presides skin and hair", chronic pulmonary disease based on treatment of cough(咳嗽), and disease of uterine and bone based on "replenish essence and marrow(補精益髓)".

• 디지털융복합연구
• /
• 제18권6호
• /
• pp.209-215
• /
• 2020

본 연구는 축제 이미지가 방문객의 축제 만족도에 미치는 요인과 축제 만족도가 행동의도에 미치는 영향에 대해서 알아보고자 하였다. 본 연구의 표본은 축제 방문객 233명을 대상으로 하였으며, 분석방법은 다중회귀분석을 사용하여 각 변수간의 인과관계에 대해 알아보았다. 연구결과 축제이미지 적합성, 편의성, 유희성 요인이 만족도에 정(+)영향을 미치는 것으로 나타났다. 그리고 만족도가 행동의도에 정(+)의 영향을 미치는 것으로 검증되었다. 따라서 본연구에서는 고유한 역사성에 근거한 이미지를 발굴하여 활용방안으로 제시하고 축제활성화에 기여하도록 한다. 특히 역사성을 가진 고유한 콘텐츠와 시대별 대표 프로그램발굴, 역사의 인물에 얽힌 이야기 등이 필요하다. 향후 연구에서 부(-)의 영향을 미친 이미지 가치성 요인에 대한 추가분석이 필요하다.

• Spatial Information Research
• /
• 제17권3호
• /
• pp.329-339
• /
• 2009

역사문화지도는 한 지역의 개별적인 유적에 대한 단순한 집성이 아니라, 다양한 구성요소들의 시.공간적 연관성에 대한 종합적인 반영이 이루어져야만 한다. 문명의 발상지라고 할 수 있는 수계권의 역사와 문화, 그리고 생활환경의 연구는 지금까지의 지역단위 차원을 넘어서 타 문화권의 비교, 나아가 국가 및 대륙간의 문명사 연구에도 일익을 담당할 수 있을 것이다. 이러한 맥락에서 본 연구는 우리 고유의 역사와 문화를 토대로 문화적 유형화 및 지역적 정체성 파악을 위한 공용의 문화정보시스템 구축에 중점을 두었다. 즉, 영산강유역권 역사문화정보시스템은 수계권의 다양한 역사문화정보를 전자지도의 형태로 담아내고, 인터넷을 통해 공유하는 Web GIS 기반의 통합정보시스템인 것이다. 상기의 시스템은 고고, 건축 미술, 생태환경, 역사, 민속 문학, 음식 등 각 분야별 기초조사 자료에 의한 종합적인 산출물이며, 학제간 연구에서의 활용뿐만 아니라 공공의 자료로써 새로운 가치창출에 그 목적을 두고 있다. 결과적으로 Web GIS 기반의 영산강유역권 역사문화정보시스템 구축에 따른 기대효과는 첫째, 영산강유역 분야의 연구에 대한 로드맵을 확인하는데 공헌할 수 있으며, 둘째, 영산강유역의 역동적 구조와 특성에 대한 학제적 탐구를 촉진하는 역할을 한다는 것이다. 그리고 셋째, 역사문화지도 연구를 위한 전문화 된 전자 학술자원 제공의 본격적 발판을 마련하는 효과를 기대할 수 있다.

• Carbon letters
• /
• 제14권1호
• /
• pp.45-50
• /
• 2013

Polyacrylonitrile (PAN) copolymers of different molecular weights were synthesized by a suspension polymerization and precipitation polymerization method. The rheology behaviors of the synthesized PAN copolymers were investigated in relation to their molecular weight, solid content and melting temperature. The influence of "historical effects" on the spinning solution of PAN was studied by analyzing the laws of viscosity considering the diversification time and temperature. The viscosity disciplines of each spinning solution conformed well to the rheological universal laws in a comparison of the suspension polymerization product with that of precipitation polymerization. Viscosity changes in the swelling process of dissolution were gentler in the suspension polymerization product; a small amount of water will quickly debase the solution viscosity, and high-speed mixing can greatly shorten the time required by the spinning solution to reach the final viscosity.

• Journal of the Korean Wood Science and Technology
• /
• 제45권2호
• /
• pp.159-167
• /
• 2017

Historical wooden buildings in Korea are being damaged by Reticulitermes speratus kyushuensis Morimoto, a type of subterranean termite, and the scale of this damage is increasing gradually because of global warming. This study evaluated the ingestion toxicity of the phenylpyrazole insecticide fipronil to R. s. kyushuensis and its applicability as termite bait with the aim of controlling termite colonies more efficiently. An ingestion toxicity assessment was conducted and the $LT_{50}$ was determined to be 4.43 day at concentrations of 10 ppm, indicating a slow-acting effect; therefore, 10 ppm was selected as an appropriate dose. A field applicability assessment was conducted in which the number of foraging workers and the rate at which the termites fed decreased 2 weeks after baiting, and termite colony activity was no longer apparent after 4 weeks demonstrating the efficacy of fipronil at eliminating colonies. Taken together, these results, indicate that low-dose fipronil eliminated R. s. kyushuensis colonies faster than insect growth regulators; therefore, it is expected to be useful when trying to conserve historical wooden buildings.

• 한국측량학회지
• /
• 제33권3호
• /
• pp.193-202
• /
• 2015

The greenbelt of South Korea has been under the process of adjustment and removal since its first designated year. This research is aimed at predicting the effect that the removal of the greenbelt has on urban growth. The SLEUTH model was executed via three calibration phases using historical data between 1990 and 2010. The urban growth of Busan Metropolitan City was predicted under its historical trend, as well as two different scenarios including development and compact development up to the year 2030. The accuracy of model, as verified by ROC, was 85.7%. The historical trend scenario showed the smallest increase, with the urban area expanding from 175.96 km² to 214.68 km² in 2030. Scenario 2, the development scenario, showed the most increase, with a 39.9% growth rate from 2010 to 2030. However, according to scenario 3, the compact development scenario, the urban area decreased in comparison to scenario 2. Accordingly, it is necessary to have effective urban growth management to provoke eco-friendly development on the removed areas, and to strengthen the non-removed areas for sustainable development. The results obtained in this study showed that the SLEUTH model can be useful for predicting urban growth, and that it can help policy makers establish proper urban planning as a decision-support tool for sustainable development.

• International Journal of Computer Science & Network Security
• /
• 제22권9호
• /
• pp.117-122
• /
• 2022

One of the promising sectors of the economy today is tourism in all forms and types. The multiplier effect of tourism is huge: the income received from one tourist exceeds the amount of money spent by him at the location on the purchase of services and goods in the range from 1.5 to 4 times. Countries known as world centers of tourism have made it a state policy, taking on the functions of forecasting, coordinating and controlling. The architectural monuments of the city historical structure are a pretty resource for tourism. Cultural tourism as a type of sociocultural human activity is one of the popular and mass types of tourism. The number of people wishing to get acquainted with historical and cultural sights is growing every year. In the cultural aspect, tourism has an impact on the spiritual and material spheres of human life, his way of life, value system, social behavior.Thus, the main task of the study is to analyze the features of the architecture of tourism and tourist complexes. As a result of the study, current trends and prerequisites for the architecture of tourism and tourist complexes were investigated.

• 영어영문학
• /
• 제56권6호
• /
• pp.1339-1360
• /
• 2010

An analogical reading of socio-historical context of Harold Pinter's The Caretaker employs some postcolonial discursive analyses of postimperial British capitalistic interests in their post war reconstruction. It is also concerned with causes of so-called broken society. The Caretaker dramatizes minimal actions: a tramp is invited by the elder brother; a job as caretaker is offered; he is reluctant to accept the first offer by the elder brother, but is willing to the second by the younger; eventually, he is excluded because he makes noises while dreaming. These trivial actions produce serious and critical speech acts with their socio-historical implications. The tramp Davies is socially and thereby existentially excluded from the centre of the cold, banished to even colder peripheries. The audience face to the question. Why is Davies excluded? This study tries to answer the question, uncovering deep-rooted capitalistic racism, and reading its symptoms. Even after 50 years The Caretaker was staged, post-imperial broken society tries to operate the betrayals of disparity between the cause and effect of what has gone wrong. Pinter confirms that the action of the play takes place in a house in west London. With the city of London as its capitalistic centre, British imperialism lavished much of its wealth which has only served sectional interests dividing people against themselves. Pinter dramatizes the root of broken society. On the one hand, Pinter foregrounds the very general conflicts between individuals and forms of power; on the other hand, he underlies the very specific strategies of socio-historical exploitation, domination and exclusion.

• Journal of Preventive Medicine and Public Health
• /
• 제39권4호
• /
• pp.309-316
• /
• 2006

Objectives: Korean epidemiological studies have used reduced samples according to the subject's characteristics, such as the health services provided, the historical note with asthma, and age, to examine the acute effect of air pollution on asthma using the Korean National Health Insurance records. However, there have been few studies on whether the effects shown in these reduced samples are different from those of all samples. This study compared the effects of air pollution on asthma attacks in three reduced samples with those of entire samples. Methods: The air pollution data for $PM_{10},\;CO,\;SO_2,\;NO_2,\;and\;O_3$, and weather conditions including temperature, relative humidity, and air pressure in Seoul, 2002, were obtained from outdoor monitoring stations in Seoul. The emergency hospital visits with an asthma attack in Seoul, 2002 were extracted from the Korean National Health Insurance records. From these, the reduced samples were created by health service, historical notes with asthma, and age. A case-crossover design was adopted and the acute effects of air pollution on asthma were estimated after adjusting for weather, time trend, and seasonality. The model was applied to each reduced sample and the entire sample. Results: With respect to the health service, the effects on outpatients were similar to those for the total sample but were different for inpatients. These similar effect sizes were also observed in the reduced samples according to the historical note with asthma and age. The relative risks of $PM_{10},\;CO,\;SO_2,\;NO_2,\;and\;O_3$, among the reduced and entire samples were 1.03, 1.04-1.05, 1.02-1.03, 1.04-1.06, and 1.10-1.17, respectively. Conclusions: There was no clear evidence to show a difference between the reduced samples and the entire samples.