• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2007년도 Proceedings of ISRS 2007
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• pp.337-340
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• 2007

Many researches conducted to investigate the relationship between surface emissivity and surface temperature in the past two decades and pointed out that the emissivity play a key role in applying remote sensing data to retrieve surface temperature. The task of surface temperature estimation is so important in many research fields, such as earth energy budgets, evapotranspiration, drought, global change and heat island effect. Therefore, it is indispensable to develop an effective and accurate technique to estimate the emissivity for accurate surface temperature estimations. This study developed an improved emissivity estimation technique for the use of surface temperature retrievals with MODIS data. The result of applying this improved technique using Band 31 of MODIS shows that the accuracy of estimated surface temperatures will be improved. This study also uses MODIS data observed in 2005 to establish the relationship between the surface emissivity correction factor and NDVI. Through the use of these correction factors, the land surface temperature can be retrieved more accurate with MODIS data.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2008년도 International Symposium on Remote Sensing
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• pp.68-71
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• 2008

Our goal is to obtain a better scientific understanding how to define the nature and role of remotely sensed land surface parameters and energy fluxes in the heat island phenomena, and local and regional weather and climate. By using the MODIS visible and thermal imagery data and analyzing the surface energy flux images associated with the change of the landcover and landuse in study area, we will estimate and present how significant is the magnitude of the heat island heat effect and its relation with the surface parameters and the energy fluxes in Taiwan. To achieve our objective, we used the energy budget components such as net radiation, soil heat flux, sensible heat flux, and latent heat flux in the study area of interest derived form remotely sensed data to understand the island heat effect. The result shows that the water is the most important component to decrease the temperature, and the more the consumed net radiation to latent heat, the lower urban surface temperature.

• 천문학회보
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• 제41권1호
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• pp.35.3-36
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• 2016

We explore the role of bars in AGN-galaxy co-evolution using a volume-limited face-on late-type galaxy sample with $M_r$ < -19.5 and 0.02 < z < 0.055 selected from SDSS DR7. In this study, we investigate how $SFR_{fib}$ as a proxy of gas contents at galactic center (over 1~1.5 kpc bulge scale) and central stellar velocity dispersion, ${\sigma}$, of host galaxies are connected to the bar presence and AGN activity. We find that galaxies are distributed in three distinct regions over the $SFR_{fib}-{\sigma}$ space and the behaviors of their bar fraction ($f_{Bar}$) are clearly different for each region. Galaxies at the AGN dominant region tend to be gas-deficient as $f_{Bar}$ increases and bars are more frequently found in fully-quenched late-type galaxies at the quiescent region, suggesting that bars speed up of the consumption of gas by SF and lead a sudden decline in the central gas. Overall, the bar effects on the AGN activity are positive over the same space except for quiescent galaxies with ${\sigma}$ > $170km\;s^{-1}$. Most significant bar effect on the AGN activity occurs in the less massive galaxies having sufficient gas, whereas the effect on galaxies at the AGN dominant region with higher the AGN fraction is relatively small. We suggest that the bar affect both central SF and AGN activities, but differently for central gas amount and BH (or bulge) mass of galaxies. We also investigate the AGN-bar connection with only pure AGNs and then confirm that they give marginally the same results.

• 한국지역지리학회지
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• 제10권4호
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• pp.698-712
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• 2004

최근 EU의 중 동부유럽으로의 확대로 EU의 경제활동 공간구조에 많은 변화가 예상된다. 본 연구는 EU의 중 동부유럽 확대로 인해 나타나고 있는 경제활동 공간변화를 외국인직접투자의 투자입지 분석을 통해 살펴보았다. 중 동부유럽 국가의 외국인직접투자는 1990년대 중반 이후 이 지역 국가들의 EU 가입이 구체화되면서 잠재력을 지닌 시장을 선점하고, 저렴한 노동력을 이용하여 생산의 효율성을 높이려는 EU 기업들에 의해 크게 확대되었다. 외국인직접 투자는 넓은 시장과 저렴한 노동력, 안정적인 정치구조, 적극적인 외국자본 유치노력을 보인 폴란드, 헝가리, 체코, 슬로바키아에 집중되고 있다. 그리고 투자지역으로는 발달된 하부구조와 지역산업조직, 숙력된 노동력, 시장 등 유리한 생산요인을 지닌 대도시와 값싼 양질의 노동력과 유사한 문화적 환경 그리고 저렴한 수송비의 이점을 지닌 동 서부 유럽의 인접지역이 선호되고 있다. 다시 말해, 중 동부유럽국가의 EU 통합에 따라 외국인직접투자 유입이 많은 헝가리, 체코, 폴란드의 수도와 그 주변지역 그리고 동 서부유럽의 인접지역이 EU의 새로운 경제활동공간으로 부상하고 있다. 이와 아울러, 발틱 공간은 인접국가간 교역 및 직접투자의 확대로 발달 가능성이 높은 지역이다.

• 한국비블리아학회지
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• 제29권3호
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• pp.13-40
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• 2018

본 연구에서는 한국의 지역대표도서관과 비슷한 위계에서 유사한 기능을 수행하는 일본의 도도부현립(都道府縣立)도서관의 상호협력체계 분석을 통하여, 국내의 지역대표도서관 건립의 기초 자료로 활용하고자 한다. 연구를 위해 일본 문부과학성이 선정한 도도부현립(都道府縣立)도서관 우수 선진 사례 도서관 8개 관을 방문하여 상호협력 체계와 상호협력서비스 현황을 분석하고, 그 중 5개 관을 선정하여 도면분석을 통한 공간구성 분석을 진행하였다. 그 결과 도도부현립(都道府縣立)도서관은 일본의 지역대표도서관으로서 역할과 기능을 정확하게 인지하고 전국구 단위에서 국립 국회도서관뿐만 아니라 인근의 지역대표도서관과도 상호협력을 시행하며 범국가적인 상호협력체계를 형성하고 있는 것을 확인하였다. 또 공간구성에서는 도서관의 역할에 따라 사무영역과 지원영역의 업무관리부문의 구성비가 가장 높게 나타나는 공간 구성비를 나타내고 있었다.

• Journal of Astronomy and Space Sciences
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• 제16권2호
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• pp.115-130
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• 1999

We report the discovery of 17 new RR Lyrae variables in the central region ($\rleq1'$) of the globular cluster M53. There candidates were identified by using the Welch & Stetson (1993) technique and confirmed by checking individual light curves in both B and V bands. The color-magnitude diagram of the horizontal-branch stars in the central region is compared with that for stars observed in the outer region by Rey et al. (1998). Including the new data from this study, we estimate the fraction of c typeRR Lyrae variables, n(c)/n(ab + c), to be 0.43 which agrees well with the valuse of other Oosterhoff group II clusters.

• 천문학회보
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• 제40권2호
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• pp.35.3-35.3
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• 2015

The central molecular zone (CMZ) is a region of rich molecular gas located in the inner few hundred parsecs in barred spiral galaxies. We study the size and morphology evolution of the CMZ of Milky Way-like galaxies both in isolation and in interaction by using N-body/hydrodynamic simulations. Specifically, we examine the gas flows and star formation activities in the central region of the galaxies. We focus in particular on the effects of galaxy interactions, including flybys and minor mergers, on the evolution of the CMZ.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.1024-1026
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• 2003

The purpose of establishing GPS networks of continuously operating reference stations (CORS) is aimed to assist land surveying or crustal deformation in the early stage. However, with a fast evolving and improving path the GPS technique has been extended to accurately measure atmospheric precip itable water vapor as a core objective of many projects developed in many countries and regions such as the SuomiNet (U.S., UNAVCO), COST716 (European, COST), GEONET (Japan, GSI), ...etc. In this paper, we present the current progress of the being-set-up GPS network in Taiwan whose atmospheric profile observations mainly count on the traditional radiosonde soundings as typically seen in any other part of the world. The GPS data collected from the Taiwan dense GPS network primarily supported by Central Weather Bureau are processed using the Bernese software version 4.2. Precipitable water vapor is then derived with the auxiliary surface meteorological measurements. Time series of precipitable water are examined and analyzed. A focus on the extreme weather cases is shown as an example.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.888-890
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• 2003

The objective of this investigation is to establish a simple yet effective block adjustment procedure for the orthorectification of multi-orbit satellite images. The major works of the proposed scheme are: (1) adjustment of satellite‘s orbit accurately, (2) calculation of the error vectors for each tie point using digital terrain model and ray tracing technique, (3) refining the orbit using the Least Squares Filtering technique and (4) generation of the orthophotos. In the process of least squares filtering, we use the residual vectors on ground control points and tie points to collocate the orbit. In orthorectification, we use the indirect method to generate the orthoimage. Test areas cover northern Taiwan. Test images are from SPOT 5 satellite. Experimental results indicate that proposed method improves the relative accuracy significantly.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.885-887
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• 2003

The purpose of this investigation is to generate true orthophotos from high resolution satellite images. The major works of this research include 4 parts: (1) determination of orientation parameters, (2) generating traditional orthophotos using terrain model, (3) relief correction for buildings, and (4) process for hidden areas. To determine the position of satellites, we correct the onboard orientation parameters to fine tune the orbit. In the generation of traditional orthophotos, we employ orientation parameters and digital terrain model(DTM) to rectify tilt displacements and relief displacements for terrain. We, then, compute relief displacements for buildings with digital building model (DBM). To avoid double mapping, we detect hidden areas. Due to the satellite’s small field of view, an efficient method for the detection of hidden areas and building rectification will be proposed in this paper. Test areas cover the city of Kaohsiung in southern Taiwan. Test images are from the QuickBird satellite.