• 한국기록관리학회지
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• 제15권2호
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• pp.7-30
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• 2015

국가기록원은 민간영역의 중요 기록물을 보호하고 기록문화에 대한 인식을 확산시키기 위한 목적으로 2008년부터 매년 '기록사랑마을'을 지정하여 지원 운영해오고 있다. 기록사랑마을은 국가 재정지원을 받는 사업인 만큼 예산사용의 정당성을 확보하고, 사업의 방향성을 재정립하기 위하여 본래의 사업 목적을 기준으로 현재 현황을 점검하고 살펴보는 작업이 필요하다. 이에 본 연구에서는 기록사랑마을 중 I군을 방문하여 접근성, 전시내용 및 방법, 시설 및 장비 등을 관찰을 통해 조사하였다. 또한 3명의 지역 관계자, 8명의 마을주민, 1명의 국가기록원 담당자와의 인터뷰를 통해 기록사랑마을의 운영현황과 문제점을 분석하여 장차 기록사랑마을 사업을 활성화할 수 있는 개선방안을 제언하였다. 본 연구는 기록사랑마을의 효과적인 이용방안을 모색함으로써 향후 보다 많은 마을에서 그 지역의 민간기록물을 수집 관리 및 활용 계획을 세우는데 도움이 되고자 한다.

• 한국통신학회논문지
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• 제37권5A호
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• pp.375-387
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• 2012

본 연구에서는 움직이는 CCD 카메라로부터 입력된 영상에서 색상 및 질감 성분을 기반으로 하는 파티클 필터를 이용하여 실시간으로 객체를 추적할 수 있는 알고리즘을 제안한다. 초기 영상에서 추적하고자 하는 객체를 선택하면 이를 타깃 파티클로 결정하고, 타깃 파티클로 부터 추적을 위한 초기 상태가 모델링 된다. 이후 프레임부터 N개의 파티클들이 랜덤 분포로 생성되고 각 파티클로 부터 질감 정보인 로컬 CS-LBP (Centre Symmetric Local Binary Patterns)모델과 색상 분포 모델이 특징 모델로 사용된다. 각 특징 모델에 대해 바타차리야 (Bhattacharyya) 거리를 사용하여 각 파티클과 타깃 파티클 간의 특징 관측 우도(likelihood)를 구하고 이를 각 파티클의 가중치로 설정 한다. 각 파티클의 가중치를 기반으로 가중치가 가장 높은 파티클을 새로운 타깃으로 설정하고, 각 파티클들을 재 샘플링 한다. 본 실험결과에서는 여러 가지 특징을 조합하여 실험을 하였고, 그 결과 색상 분포 모델과 로컬 CS-LBP를 조합했을 때 추적 성능이 가장 우수한 것을 확인할 수 있었다.

• 지역과문화
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• 제7권3호
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• pp.1-21
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• 2020

생활에 밀착한 일상 속 문화 활동을 강조하는 생활문화는 예술과 일상의 통합과 타자와 소통하는 공동체적 삶을 지향하고 이 과정에서 개인과 사회가 가져야할 가치들을 환기시키고 회복한다. 본 연구는 이렇게 지역문화로서 생활문화의 가치가 발현되는 개별적이고 복잡한 맥락과 과정을 이해하기 위하여, 수원 지역의 '고색전통농악보존회' 생활문화 활동 사례를 분석한다. 이를 통해 실제 현장에서 예술과 일상이 어떻게 통합되며 공동체적 삶을 회복시키고 있는지 진단한다. 문헌자료와 참여관찰, 인터뷰를 통한 현상학적 연구를 수행하여 개인, 공동체, 지역영향으로 생활문화 활동과 공적지원의 사회적 영향을 범주화하였다. 연구결과 생활문화 공적 지원으로 늘어난 활동경험은 공동체의 예술적 발전과 인적 상호작용을 활성화시키고 더불어 개인은 예술적 본성을 찾고 지역사회에 영향을 주는 문화예술의 주체이자 실천가로 거듭나고 있었다. 또한 지역주민도 함께 참여하는 생활문화 활동의 과정에서 참여자들의 지역사회 일원으로서의 정체성이 강화되고 있음을 확인하였다.

• Acta Via Serica
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• 제8권2호
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• pp.25-52
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• 2023

The astronomic observatory of Graw Village is located on Mount Dari Lolikan, facing the village. Graw is located in the foothills of Mount Ser-i-Rash, 25 km northeast of Erbil Governorate, Iraq. This study attempts to clarify the foundations of this observatory, its components, as well as the founder and the date of its establishment. The study made efforts to clarify the benefits of this calendar to local residents in their daily lives. The database for this study is based on direct observation of the observatory station. The observation included the recording date and position of sunset and the appearance of stars throughout the year. Observation and documentation for both sunset and stars were performed over several years due to weather conditions since observation was not possible on foggy and rainy days and nights. Each observation took five to ten minutes depending on the clarity of the sky. The observatory consists of a group of stone cones. Each cone was built by stones in a specific location after careful and long observation of the sunset. Efforts were made to observe the disappearance and reappearance of the stars based on the change in the position of the Earth in relation to the sun. Graw's calendar helped to recognize important times of the year, such as the winter and summer forties, which were very important, especially when snow covered the roads, transportation stopped, crops spoiled, and pets stayed in their barn. The most important features of the winter forties are the memories, experiences, and minds of the villagers' ancestors. The forties were associated with the arrival of cold and heavier rain throughout the year, which is consistent with modern science, as the angle at which the Earth rotates increases the number and activity of weather depressions that affect the study area during this period. This observatory has a close connection with the daily life of the villagers, especially in the past centuries. It helped the people of the area in their appointments to carry out their work in the field of agriculture. The observatory was also of great importance in the field of education in the past centuries, especially in traditional religious schools. It also appears from this research that the calendar has ancient roots, which extend back thousands of years, as evidenced by the Ezidis who follow an ancient religion whose roots extend back thousands of years and who fast during both the winter and summer forties annually, with the participation of people in various regions of the world. It is not known who made this astronomic observatory but most of the oral information that has been passed down to us by word of mouth agrees on both Mullah Abdullah Al-Kurdi and Mullah Omar. Likely, this astronomic observatory was built around the late 17^th and early 18^th centuries.

• Journal of Positioning, Navigation, and Timing
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• 제2권1호
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• pp.75-80
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• 2013

This article presents the design of long range navigation (LORAN)-disciplined oscillator (LDO), employing the timing information of the LORAN system, which was developed as a backup system that corrects the vulnerability of the global positioning system (GPS)-based timing information utilization. The LDO designed on the basis of hardware generates a timing source synchronized with reference to the timing information of the LORAN-C receiver. As for the LDO-based timing information measurement, the Kalman filter was applied to estimate the measurement of which variance was minimized so that the stability performance could be improved. The oven-controlled crystal oscillator (OCXO) was employed as the local oscillator of the LDO. The controller was operated by digital proportional-integral-derivative (PID) controlling method. The LDO performance evaluation environment that takes into account the additional secondary factor (ASF) of the LORAN signals allows for the relative ASF observation and data collection using the coordinated universal time (UTC). The collected observation data are used to analyze the effect of ASF on propagation delay. The LDO stability performance was presented by the results of the LDO frequency measurements from which the ASF was excluded.

• Journal of Astronomy and Space Sciences
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• 제36권4호
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• pp.249-264
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• 2019

In this study, the precise orbit determination (POD) software is developed for optical observation. To improve the performance of the estimation algorithm, a nonlinear batch filter, based on the unscented transform (UT) that overcomes the disadvantages of the least-squares (LS) batch filter, is utilized. The LS and UT batch filter algorithms are verified through numerical simulation analysis using artificial optical measurements. We use the real optical observation data of a low Earth orbit (LEO) satellite, Cryosat-2, observed from optical wide-field patrol network (OWL-Net), to verify the performance of the POD software developed. The effects of light travel time, annual aberration, and diurnal aberration are considered as error models to correct OWL-Net data. As a result of POD, measurement residual and estimated state vector of the LS batch filter converge to the local minimum when the initial orbit error is large or the initial covariance matrix is smaller than the initial error level. However, UT batch filter converges to the global minimum, irrespective of the initial orbit error and the initial covariance matrix.

• Journal of Advanced Marine Engineering and Technology
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• 제33권1호
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• pp.166-174
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• 2009

Gijang Sea is located on the southeastern coast of Korea. This study establishes a basic system to identify optimal sites for the wave power generation. To achieve this goal, the field measurements were made at the field site in front of Dong-am fishing port at Gijang. In addition, we analyzed the offshore wave data at the Donghae buoy operated by Korea Meteorological Administration(KMA) and compared the data with the wave characteristics in Gijang Sea. The main results were as follows. In winter, the wave direction in Gijang Sea ranged between east and south($90{\sim}180^{\circ}$). The main wave direction was east($90^{\circ}$). The Significant wave heights and periods were under 2 m and $5{\sim}15$ sec, respectively. A comparison of water depth and wave direction constitutes one(condition) of the important parameters for selecting the optimal site for the wave power generation.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2005년도 학술발표회 논문집
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• pp.194-198
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• 2005

Although the rainstorm causes local damage on large scale, it is difficult to predict the movement of the rainstorm exactly. In order to reduce the rainstorm damage of the rainstorm, it is necessary to analyze the path of the rainstorm using various statistical methods. In addition, efficient time interval of rainfall observation for the analysis of the rainstorm movement can be derived by applying various statistical methods to rainfall data. In this study, the rainstorm tracking using statistical method is performed for various types of rainfall data. For the tracking of the rainstorm, the methods of temporal distribution, inclined Plane equations, and cross correlation were applied for various types of data including electromagnetic rainfall gauge data and AWS data. The speed and direction of each method were compared with those of real rainfall movement. In addition, the effective time interval of rainfall observation for the analysis of the rainstorm movement was also investigated for the selected time intervals 10, 20, 30, 40, 50, and 60 minutes. As a result, the absolute relative errors of the method of inclined plane equations are smaller than those of other methods in case of electromagnetic rainfall gauges data. The absolute relative errors of the method of cross correlation are smaller than those of other methods in case of AWS data. The absolute relative errors of 30 minutes or less than 30 minutes are smaller than those of other time intervals.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2009년도 학술발표회 초록집
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• pp.2161-2166
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• 2009

It is important for 0-6 hour nowcasting to provide for a high-quality initial condition in a meso-scale atmospheric model by a data assimilation of several observation data. The polarimetric radar data is expected to be assimilated into the forecast model, because the radar has a possibility of measurements of the types, the shapes, and the size distributions of hydrometeors. In this paper, an impact on rainfall prediction of the data assimilation of hydrometeor types (i.e. raindrop, graupel, snowflake, etc.) is evaluated. The observed information of hydrometeor types is estimated using the fuzzy logic algorism. As an implementation, the cloud-resolving nonhydrostatic atmospheric model, CReSS, which has detail microphysical processes, is employed as a forecast model. The local ensemble transform Kalman filter, LETKF, is used as a data assimilation method, which uses an ensemble of short-term forecasts to estimate the flowdependent background error covariance required in data assimilation. A heavy rainfall event occurred in Okinawa in 2008 is chosen as an application. As a result, the rainfall prediction accuracy in the assimilation case of both hydrometeor types and the Doppler velocity and the radar echo is improved by a comparison of the no assimilation case. The effects on rainfall prediction of the assimilation of hydrometeor types appear in longer prediction lead time compared with the effects of the assimilation of radar echo only.

• 대기
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• 제17권3호
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• pp.291-298
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• 2007

The precipitable water vapors (PWVs) obtained from Global Positioning System (GPS) and Microwave Radiometer (MWR) measurements have been compared for validation of precision of the GPS PWV at Daegwallyoung station for 21 days from Sep. 30 to Oct. 20, 2006. The GPS PWV is estimated using the delay of GPS signals due to the water vapor in the atmosphere with a local mean temperature equation, called HP model, and the MWR PWV by the combinational radiance observation of two channels (23.8 and 31.4 GHz). During the co-observation period, the MWR and GPS PWV show a similar trend, and the bias between the PWVs is 1.7 mm on average. When the bias is removed, the PWV of GPS gives good agreement with that of MWR, having about 1 mm for both the standard deviation and RMS error between the GPS and MWR PWV.