• 한국농촌건축학회논문집
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• 제10권1호
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• pp.27-35
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• 2008

After researching 40 rural areas named 'valley' in Goesan County, Chungbuk Province, they are classified by 2 two classes. Firstly, villages located on the crossways valley are 22 of 40, they are located on the valley which is at right angles with a direction of light of a mountain range. A closed valley location is placed in the deep valley against a background mountain range. It is divided with closed large valley and small valley. Secondly, an open valley location style is 14 of 40. It means the villages are paralleled with a direction of mountain and located with same direction of entrance. This study is carried out to understand the characteristic of location in vernacular agricultural villages by judging from natural environment around the village. For this purpose, there were selected 3 villages of the valley categirized villages in Geosan Area which lean against valley. After classifying these sample by the morphorogical approach, according to compare them with pre-researched villages, the methodology of spatial structure was investigated in agriculture villages.

• 한국가구학회지
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• 제24권1호
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• pp.42-50
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• 2013

The objective of this study is to explore basic type of character of humans and to suggest a design method of establishing a spatial construction environment for developing effective learning ability based on such type of character. As a range of research, spatial formative language was deduced and space design strategy for the children was suggested through an analysis of spatial requirements by exploring connectivity depending on features of 9 types of character through Enneagram. As a method of research, a process of suggesting a concrete method after defining an element of spatial construction and deducing a formative language for developing and strengthening effective learning ability for each type of character. As a result of research, the methods of children space design strategy for enhancing learning ability for leadership in a future specific fields were suggested through 9 different type of character with image of case study.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2011년도 춘계학술대회 초록집
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• pp.166.2-166.2
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• 2011

Incheon Bay of Korea is one of the most famous regions for high tidal range. Ministry of Land, Transport and Maritime Affairs(MLTM) has implemented preliminary investigation for tidal power energy development in this area since 2006. Through field observations, various kinds of marine data consisting of depth and geography, marine weather, tidal currents, wave, seawater characteristics, geology, marine ecosystem and marine environment were gathered. To use these data efficiently for the determining of feasibility of developing and appropriateness of project scale, spatial data management and application system is essential. Therefore, in this study, the concept, methodology and procedure of spatial data modeling are defined for tidal energy development. Spatial data modeling consists of essential model relating to tidal energy directly and optional model including environmental factors. Essential model is composed with fundamental elements like as depth, geography, and several numerical modeling results(tide, tidal current, wave).

• 한국환경과학회지
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• 제20권2호
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• pp.155-161
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• 2011

In application and discussion of population structure and phenotypic divergence in plant community, the classic Lotka-Volterra models of competition and spatial model are conceived as a mechanism that is composed by multiple interacting processes. Both the Lotka-Volterra and spatial simulation formulae predict that species diversity increases with genotypic richness (GR). The two formulae are also in agreement that species diversity generally decreases within increasing niche breadth (NB) and increases with increasing potential genotypic range (PGR). Across the entire parameter space in the Lotka-Volterra model and most of the parameter space in the spatial simulations, variance in community composition decreased with increasing genotypic richness. This was, in large part, a consequence of selecting genotypes randomly from a set pool.

• 한국정보과학회논문지:데이타베이스
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• 제29권1호
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• pp.44-57
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• 2002

다중 공간 질의는 동시에 2개 이상 수행되는 영역 질의로 정의되며 인터넷 기반 지도 보기 응용의 주요 연산이 되므로, 질의 처리 속도의 개선을 위해서 병렬로 처리되어야 하고 질의 처리 비용 중 큰 비중을 차지하는 디스크 입출력 시간을 최대한 줄일 필요가 있다. 그런데 다중 CPU/다중 디스크 구조상에서 디클러스터링을 수행하더라고, 다중 공간 질의를 처리하는 도중 질의 간 임의 탐색이 발생하여 디스크 입출력 시간이 증가하는 문제점이 있다. 이 논문에서는 디클러스터된 공간 데이터베이스에서 다중 공간 질의를 처리할 때 발생하는 문제점인 질의 간 임의 탐색을 분석하고, 해결 방안으로 질의 스케줄링 기법을 제시하였다. 질의 스케줄링 기법은 질의 간 관련성을 이용해서 질의 우선 순위를 조정해서 질의 간 임의 탐색을 해결하는 방법으로써, 질의간의 공간 및 시간 관련성 부여를 위해 질의 간 위치 관련성과 질의 대기 시간을 이용하였다. 실험 결과, 질의 스케줄링을 수행하면 디스크 캐쉬의 적중률이 최대 34% 향상되어 디스크 입출력 비용을 최대 6%까지 줄일 수 있어 다중 공간 질의 처리 시의 성능을 개선할 수 있는 것으로 나타났다.

• 한국산학기술학회논문지
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• 제11권12호
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• pp.5015-5022
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• 2010

기존의 패턴 탐사 기법들은 대부분 객체가 갖는 공간 정보의 연속적인 변화에 대한 패턴 탐사는 가능하나, 추출하고자 하는 패턴에 반드시 포함되어야 하는 공간 정보에 대한 제약이 없어 특정 지점들 사이의 최적 경로 탐색 문제나 단위기간 동안 이동 객체가 순회해야 하는 지점들에 대한 경로 예측 문제 등에 적용하기 어렵다. 본 논문에서는 Road Network 상의 특정한 지점들 사이를 이동한 객체의 위치 데이터들 중 최다 빈발 패턴과 시간 및 비용 등의 가중치를 복합적으로 고려하여 최적의 이동 경로를 탐색하는 방법(Spatial-Temporal Optimal Moving Pattern(with Frequency & Weight) algorithm)[13]을 이용하여, 공간 개념 계층에 따른 경로 탐색의 정확도를 분석한다. 분석의 결과는 패턴 탐사 과정에 있어 공간 제약을 적용하여 검색 데이터 범위를 축소함으로써 데이터베이스 검색 시간을 최소화함을 보이고, 또한 공간 추상 계층의 각 계층별 영역 내 포함여부를 고려함으로써 효율적으로 최적 이동 패턴을 탐색하여 제공하도록 한다.

• 한국컴퓨터정보학회논문지
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• 제11권2호
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• pp.43-52
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• 2006

최근 유비쿼터스 컴퓨팅의 관심이 증대되면서, 방대하고 다양한 형태의 데이터에 대한 효율성과 효과성을 고려한 지식 탐사연구의 필요성이 요구된다. 공간 특성화 방법은 공간과 비공간 속성들을 고려하여 특성화 지식을 발견하는 방법으로, 기존의 특성화 방법을 확장하여 공간 영역에 대한 다양한 형태의 지식을 발견할 수 있다. 기존 공간 특성화기법에 대한 연구들은 다음과 같은 문제점을 가진다. 첫째, 기존의 연구는 탐사된 지식의 결과가 다각적인 공간 분석을 수행하지 못하는 문제점을 가진다 둘째, 공간 탐색 시 사용자에 의해 미리 정해진 위치 영역만을 고려하여 탐색함으로 유용한 지식탐사를 보장하지 못하는 문제점을 가진다. 따라서 본 연구에서는 밀도 기반의 클러스터링이 적용된 새로운 공간 특성화기법을 제안한다.

• 대한원격탐사학회지
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• 제32권1호
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• pp.61-65
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• 2016

Importance of remote sensing for surface is increased than past. So many countries try to many ways to retrieve surface reflectance. In this study, we study a Bidirectional Reflectance Distribution Function (BRDF) to retrieve surface reflectance. We apply BRDF using observed surface reflectance of SPOT/VEGETATION (VGT-S1) and angular data to get Bidirectional Reflectance Distribution (BRD) coefficients for calculating scattering. And then we apply BRDF in the opposite direction with BRD coefficients and angular data to retrieve Background Surface Reflectance (BSR). The range of BSR is not over $0.4{\mu}m$ (blue), $0.45{\mu}m$ (red), $0.55{\mu}m$ (NIR). And for validation we compare BSR with VGT-S1, there are bias is from 0.0116 to 0.0158 and RMSE is from 0.0459 to 0.0545. As a result, we confirm that BSR is similar to VGT-S1.

• Current Optics and Photonics
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• 제5권4호
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• pp.409-420
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• 2021

We propose a method to synthesize a color non-hogel-based computer-generated-hologram (CGH) from light field data of a three-dimensional scene with a hologram pixel pitch shared for all color channels. The non-hogel-based CGH technique generates a continuous wavefront with arbitrary carrier wave from given light field data by interpreting the ray angle in the light field to the spatial frequency of the plane wavefront. The relation between ray angle and spatial frequency is, however, dependent on the wavelength, which leads to different spatial frequency sampling grid in the light field data, resulting in color aberrations in the hologram reconstruction. The proposed method sets a hologram pixel pitch common to all color channels such that the smallest blue diffraction angle covers the field of view of the light field. Then a spatial frequency sampling grid common to all color channels is established by interpolating the light field with the spatial frequency range of the blue wavelength and the sampling interval of the red wavelength. The common hologram pixel pitch and light field spatial frequency sampling grid ensure the synthesis of a color hologram without any color aberrations in the hologram reconstructions, or any loss of information contained in the light field. The proposed method is successfully verified using color light field data of various test or natural 3D scenes.

• 전자공학회논문지D
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• 제35D권5호
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• pp.24-32
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• 1998

Spatial green's functions for a horizontal magnetic dipole in a parallel-plate waveguide are expressed in an improved closed-form with two-level approximation of the spectral green's functions. The results evaluated by the present closed-from green's function with two-level approximation are compard with those obtained the previous closed-form green's function with one-level approximation. The present results are observed to be more acurate than the previous results over wide frequency range as well as whole spatial range. The combination of the present closed-form green's functions and the moment mehtod may help in analyzing the problem of EMP coupling through an aperture into a parallel-plat waveguide and the microstrip slot antenna with a reflector.