• 대한지리학회지
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• 제48권3호
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• pp.433-452
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• 2013

일제강점기에 기원한 일본식 지명이자 상업 중심지로서의 본정통은 오늘날까지 우리나라 도시들에서 번화가를 일컫는 대명사로 통한다. 이 연구는 서울의 충무로와 명동 일대를 사례로 도시 본정통이 함축하고 있는 다양한 장소 기억들을 탐색한 것이다. 연구자는 장소 기억이라는 개념을 지리학의 입장에서 정초한 다음, 이 개념을 매개로 본정통이라는 한 장소에 쌓인 기억의 다층성과 경합성에 주목하며 본정통의 장소 기억을 세 가지 층위로 재구성할 수 있었다. '식민 권력의 상징' vs. '근대의 표상', '금융 자본주의의 심장' vs. '문화 예술인의 마당', '유행의 공간' vs. '정체성의 장소'가 그것이다. 결론적으로, 연구자는 도시에서 우리 삶의 흔적이 여기 저기에 수평적으로 산재하는 것이 아니라 도시 안의 한 장소 그 자체가 일종의 팔림세스트라는 점을 강조하였고, 따라서 도시 공간에 대한 연구에서 수평적 접근보다는 수직적 접근이 필요함을 주장하였다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2009년도 세계 도시지반공학 심포지엄
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• pp.157-171
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• 2009

A 151 storey super high-rise building located in an area of reclaimed land constructed over soft marine clay in Songdo, Korea is currently under design. This paper describes the design process of the foundation system of the supertall tower, which is required to support the large building vertical and lateral loads and to restrain the horizontal displacement due to wind and seismic forces. The behaviour of the foundation system due to these loads and foundation stiffness influence the design of the building super structure, displacement of the tower, as well as the raft foundation design. Therefore, the design takes in account the interactions between soil, foundation and super structure, so as to achieve a safe and efficient building performance. The site lies entirely within an area of reclamation underlain by up to 20m of soft to firm marine silty clay, which overlies residual soil and a profile of weathered rock. The nature of the foundation rock materials are highly complex and are interpreted as possible roof pendant metamorphic rocks, which within about 50m from the surface have been affected by weathering which has reduced their strength. The presence of closely spaced joints, sheared and crushed zones within the rock has resulted in deeper areas of weathering of over 80m present within the building footprint. The foundation design process described includes the initial stages of geotechnical site characterization using the results of investigation boreholes and geotechnical parameter selection, and a series of detailed two- and three-dimensional numerical analysis for the Tower foundation comprising over 172 bored piles of varying length. The effect of the overall foundation stiffness and rotation under wind and seismic load is also discussed since the foundation rotation has a direct impact on the overall displacement of the tower.

• 한국토양비료학회지
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• 제49권5호
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• pp.555-563
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• 2016

Uniformity and leveled distributions of soil chemicals across paddy fields are critical to manage optimal crop yields, reduce environmental risks and efficiently use water in rice cultivation. In this study, an investigation of spatial distributions on soil chemical properties was conducted to evaluate the effect of land leveling on mitigation of soil chemical property heterogeneity from a remodeled paddy field. The spatial variabilities of chemical properties were analyzed by geostatistical analyses; semivariograms and kriged simulations. The soil samples were taken from a 1 ha paddy field before and after land leveling with sufficient water. The study site was located at Bon-ri site of Dalseong and river sediments were dredged from Nakdong river basins. The sediments were buried into the paddy field after 50 cm of top soils at the paddy field were removed. The top soils were recovered after the sediments were piled up. In order to obtain the most accurate spatial field information, the soil samples were taken at every 5 m by 5 m grid point and total number of samples was 100 before and after land leveling with sufficient water. Soil pH increased from 6.59 to 6.85. Geostatistical analyses showed that chemical distributions had a high spatial dependence within a paddy field. The parameters of semivariogram analysis showed similar trends across the properties except pH comparing results from before and after land leveling. These properties had smaller "sill" values and greater "range" values after land leveling than ones from before land leveling. These results can be interpreted as land leveling induced more homogeneous distributions of soil chemical properties. The homogeneous distributions were confirmed by kriged simulations and distribution maps. As a conclusion, land leveling with sufficient water may induce better managements of fertilizer and water use in rice cultivation at disturbed paddy fields.

• 한국조경학회지
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• 제29권1호
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• pp.124-130
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• 2001

We have increasing number of new ponds planned and designed in traditional styles. However, many of the stoneworks at the edges of those new ponds are not the characteristics of our traditional ponds. This study is aiming at surveying and analysing the building techniques of Korean traditional water edges built with stones, by investigating selected ponds in royal palace gardens. This study was conducted through field investigation and literature reviews. Nine ponds from Gyongbok Palace, Changdeok Palace, and Changgyong Palace, which have many well-preserved ponds of various styles, were surveyed. First of all, the building materials (stones), or the kinds and sizes of stones used for the edges of ponds were surveyed. Secondly, construction methods, or the height and techniques of buildings stone walls were surveyed. Major findings were, first, the edges of most ponds constructed with granite Jangdaeseok, usually 120cm-140cm long, and 30cm-40cm thick. The only exceptions were those ponds which seemed to have been influenced by Japanese style. Second, typical pond ages were up-right vertical walls. Granite jangdaeseoks were piled-up 2 stories or up to six stories. Exceptions were Bandoji Pond and Chundangji Pond which had been constructed during latest period(King 'Ghojong' period). Third, heith of stone walls were between 60cm and 220cm. The depth of ponds were about 150cm or less, and the rest of the edge wall height was freeboard. Though the results of this study was not made by precise investigation and actual measurement, they could be fundamental information and data for the traditional styles of the Chosun dynasty Palace. It is believed that continuous researches on this matter will result in important and fundamental data of the establishment of traditional water edges.

• 기술사
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• 제1권1호
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• pp.18-25
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• 1968

Higher yield in rice paddies is greatly dependent on adequately balanced and timely supply of water. A majority of rice paddy in Korea is generally irrigated by rainfall, but in many cases it has to be supplemented by artificial irrigation for optimum rice culture. Although the water requirement of rice plant is for higher Than that of athec crops, submerged condition of rice paddy is not Necessarily required. The moisture requirement of rice plant varies with its growing stages, and it is possible to increase the irrigation efficiency through reduction of water loss due to percolation in rice paddies. An experimental plots were set up by means of sandomized block design with three duplication; (a) All time submerged, (b) Economically controlled, and (c) Extremely controlled. Three different irrigation periods Were (a) Initial sage, (b) Inter-stage, and (c) Yast stage. The topsoil of the three plots were excavated to the depth of 30 cm and then compacted with clay of 6 cm thickness. There after, they were piled up with the excavated top soils, leveled and cored with clay of 6 cm thickness around footpath in order to prevent leakage. The results obtained from the experiments are as follows, 1. There is no difference among the three experiments plots in terms of physical and chemical conditions, soil properties, and other characteristics. 2. Culm length and ear length are not affected by different irrigation methods. 3. There is no difference in the mature rate and 1, 000 grain weight of rice for the three plots. 4. The control plot which was irrigated every three days shows an increased yield over the all the time submerged plot by 17.8 percent. 5. The clay lined plot whose water holding capacity was held 5 days long, needs only to be irrigated every 7 days. 6. The clay lined plot shows an increased yield over the untreated plot ; over all-the-time submerged plot by 18 percent ; extremely controlled plot by 18 percent, and economically controlled plot by 33 percent. 7. It may be saved in water requirement about one Thirds.

• 지질공학
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• 제13권4호
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• pp.475-490
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• 2003

본 연구는 물리탐사방법 중 GPR을 이용한 고고학에서의 활용 가능성을 제시하기 위한 것이다. 따라서 탐사의 결과를 보고 고고학자들이 직접 발굴에 응용하여 발굴로 검증된 예만을 제시하였다. 탐사지역으로는 강원도 원주시 부론면 법천리 고분군, 경상남도 고성군 송학동 1호분, 그리고 일본의 사가현에 위치한 요시노가리 옹관유적이다. GPR 탐사의 time slice 분석법을 유구의 평면적인 분포양상을 파악하는데 이용하였다. 이 탐사법으로 각 유적지에서 이상반응(Anomaly)을 찾을 수 있었으며 지하의 각 깊이별 문화유적 분포양상의 변화를 살펴볼 수 있었다. 원주 법천리 유적에서는 석실 및 기타 석재 유구들이 GPR에 대하여 강한 반사신호를 나타내어 백제시대 유구의 분포상황을 확인할 수 있었다. 또한 고성 송학동 1호분은 그동안 고고학계에 논란이 되어왔던 전방후원분의 진위여부에 대하여 탐사 및 발굴을 통하여 3개의 분묘가 합쳐진 것으로 들어났다. 특히 일본의 요시노가리 유적의 2열 옹관 매장지는 발굴을 GPR탐사로 대신한 좋은 예이다. 이상의 조사에서 GPR탐사를 이용하여 유구의 분포범위 및 양상을 발굴 전에 미리 확인할 수 있었다.

• 융합신호처리학회논문지
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• 제11권4호
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• pp.345-353
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• 2010

로봇의 대역적 자기 위치 추정에서의 일반적인 해법은 로봇의 자기 위치에서 복수의 가설을 생성하고, 관측된 랜드마크의 특정을 기초로 각 가설을 평가하여 가장 확실한 자기 위치를 구하는 것이다. 기존의 대표적인 방법인 ML이나 MCL은 랜드마크의 특징과 생성된 가설의 모든 조합을 평가하는 방법으로서 충분한 계산 자원에서는 최적의 방법이라 할 수 있다. 그러나, 일반적으로 계산량은 평가할 조합의 수에 비례하므로 다수의 조합이 존재하는 넓은 환경에서는 이러한 방법은 계산량이 아주 많아진다. 이러한 문제를 해결하기 위하여 본 논문에서는 확실하고 유망한 조합을 우선적으로 선택 평가하는 것으로, 계산시간을 효율적으로 이용하는 새로운 추정방법을 제안한다. 그 기본이 되는 방법으로는 RANSAC 알고리즘과 RANSAC 알고리즘의 효율화 방법인 Preemption scheme을 이용한다. 제안된 방법은 로봇이 관측할 때마다 계산량을 일정치 이하로 억제할 수가 있고, 또한 검증 실험에서 높은 추정 성능을 확인할 수 있었다.

• 한국식품조리과학회지
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• 제21권6호통권90호
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• pp.782-793
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• 2005

This study investigated the effect of $2\%$ addition of pectin and alginate on the Physicochemical and retrogradation Properties of Jeungpyun, a Korean traditional fermented rice cake. The volume of batters with alginate and Pectin was significantly larger than that of control. Jeungpyun samples with Pectin and alginate had a larger volume with uniform and smaller cell size. All samples showed largest foaming capability after second fermentation. Foaming capability of the control ($0\%$ addition of pectin and alginate) was significantly larger than that of the treated samples. The amount of reducing sugar tended to increase during fermentation but decreased after steaming, which was due to the increase in hydrolysis of starch. On the contrary, the content of free sugar was slightly decreased during fermentation but slightly increased after steaming. The control contained the largest amount of free sugar after steaming. The microstructure of starch particles after fermentation showed completely dispersed starch granules with air bubbles. After steaming, the structure was sponge-like in all samples. Samples with added alginate and pectin had significantly higher water binding capacity than those of the control. All samples showed noticeably increased solubility and swelling power at $70^{circ}C$ with the control being significantly lower than the treated samples. Retrogradation was measured with $\alpha$-amylase and the retrogradation process of the sample with added alginate and pectin proceeded slower than that of the control. The relative crystallinity was observed through X-ray diffraction method and samples with added alginate and pectin had smaller crystallinity and delayed retrogradation compared to the control. Thus, Jeungpyun with the addition of alginate and Pectin demonstrated improved functionality and dietary fiber addition effect. The storage period of was extended as the retrogradation rate was delayed by the addition of dietary fibers.

• 한국멀티미디어학회논문지
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• 제9권5호
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• pp.542-553
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• 2006

컴포지트 비디오 신호는 Y와 C성분이 같은 주파수대에서 중첩되어 있기 때문에 영상처리를 위한 Y/C 분리 시 필연적으로 화질의 열화가 발생한다. 이에 본 논문에서는 이러한 화질의 열화를 최소화하기 위하여 3차원 콤 필터 기법과 웨이블릿 변환을 혼용하여 최적의 영상을 만들 수 있는 새로운 콤 필터 기법을 제안하고 이를 VLSI로 설계하였다. 제안된 기법은 웨이블릿을 적용하였으며 비교 라인에 대한 임계값을 적용하여 최상의 화질을 얻을 수 있도록 하였다. 시뮬레이션 결과 제안된 방법은 기존의 방법에 비해 PSNR비교 시 개선된 화질을 나타내었으며, 실제 눈으로 판독한 결과 뚜렷한 화질개선을 나타내었다. 또한 제안된 방법의 실제 응용을 위하여 적합한 하드웨어 구조를 개발하였으며, VHDL 을 이용하여 구현하였고 0.25 micrometer CMOS 공정 라이브러리를 이용하여 최종적인 VLSI 레이아웃을 생성하였다.

• 한국정보통신학회논문지
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• 제11권9호
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• pp.1650-1657
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• 2007

본 논문은 블록 처리 방법을 기반으로 하는 링잉 노이즈 감소 알고리즘을 사용할 때, 블록 불연속 노이즈(Block Discontinuty)를 방지 할 수 있는 중첩 기 반(Overlapped Block) 연산과 Hanning Window에 관련된 것이다. 링잉 노이즈 감소 알고리즘은, 24bit RGB와 블록 기반 연산으로 하며, 수정된 K-means 알고리즘을 바탕으로 한다. 그래서 제안한 중첩 기반 연산은 입력 영상을 여러 단위 블록으로 조각낼 때, 단위 블록의 크기의 반을 중첩 시켜 선택하는 방법이다. $16{\times}16$ 픽셀 크기의 데이터 블록을 데이터 유닛(Data Unit)이 라고 정의하였다. 그 후 처리된 데이터 유닛들을 등방성 분포를 지닌 Hanning Window를 사용하여 중첩된 데이터에서 원 이미지 형태로 복원하였다. 최종적으로 언급된 알고리즘의 성능을 확인하기 위해서 링잉 노이즈를 가진 이미지를 기존 방법(비 중첩 기반 연산)과 제안한 알고리즘으로 처리함으로써 각각의 결과를 비교하였다.