• 한국지반신소재학회논문집
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• 제22권2호
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• pp.85-92
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• 2023

본 연구에서는 제주 지역에서 어스앵커로 지지된 흙막이벽의 측방토압 적용을 평가하기 위하여, 2개의 현장 시공 사례를 기반으로 수평변위에 대한 계측값과 예측값을 비교하였다. 흙막이벽에 작용하는 측방토압의 예측은 Rankine 토압, Hong & Yun 측방토압, Terzaghi & Peck 수정측방토압, Tschebotarioff 측방토압을 이용하여 탄소성해석을 실시하였다. 그 결과, A현장에 대한 최대 수평변위의 예측값은 계측값에 비하여 약 10배~12배로 화인되었으며, B현장의 경우에는 예측값이 계측값보다 약 9배~12배로 평가되었다. 즉, 2개 현장 모두 계측값에 비해 예측값에 의한 최대 수평변위가 유사한 증가율을 보였다. 모든 현장 사례에서 계측값에 의한 최대 수평변위는 퇴적층, 연암층 및 클링커층에서 발생하였고, 수평변위 형상은 사다리꼴 형태에 나타냈다. 그리고 예측값에 의한 최대 수평변위는 클링커층 주변에서 발생하였으며, 수평변위 형상은 타원형으로 나타났다. 클링커층이 혼재되어 있는 지반에서 계측값이 예측값과 매우 다른 수평변위 경향을 보이는 원인으로는 클링커층이 암반층과 연속된 지층의 형태로 존재하기 때문으로 판단되었다. 즉, 예측되는 토압 분포와 상당히 다른 경향을 보이는 제주 지역의 토압 분포 특성을 고려하면 과다하게 평가되는 기존의 예측방법을 적용하는 것은 다소 무리가 있을 것으로 판단되기 때문에, 보다 경제성을 확보할 수 있는 현실적인 제주 지역의 측방토압에 관한 연구가 수행될 필요가 있다.

• 한국지구과학회지
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• 제42권4호
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• pp.412-424
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• 2021

Understanding the distribution of heavy metals in sediment is necessary because labile heavy metals can partition into the water column and bioaccumulate in aquatic organisms. Here we investigated six heavy metals (Co, Cu, Mn, Ni, Pb, and Zn) in sediment cores using a five-step sequential leaching method to examine the occurrence of heavy metals in the sediment. The results showed that all elements, except Mn, are depleted in the exchangeable and carbonate fractions. However, heavy metal concentrations are much higher in the Fe-Mn oxide and organic matter fractions, especially for Cu, indicating enrichment in the organic matter fraction. Furthermore, contamination parameters (contamination factor and geoaccumulation index) indicate that Mn contamination is high, primarily derived from anthropogenic sources, presenting a potential risk to ecosystems in the Nakdong River.

• 한국지구과학회지
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• 제31권1호
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• pp.71-87
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• 2010

이 연구의 목적은 '지구'에 대한 8학년 학생들의 심상을 탐색하는 것이다. '지구'에 관해 단어와 그리기로 표현된 중학생들의 심상을 지구계 이해 분석틀로 분석하였다. 학생들의 '지구'에 관한 심상은 시각적 이미지를 형성하게 된주된 영향을 미친 경험과 선행 지식에 따라 달라졌다. 특히 간접적 시각 경험에 의한 지구의 전체 모습에 기반을 둔 천문학적 관점과 직접적 시각 경험에 의한 지표의 풍경과 환경에 기반을 둔 일상적 관점에 따라 지구계 이해가 다르게 나타났다. 대체적으로 학생들의 '지구'에 관한 심상은 시각적 경험에 의해 영향을 받은 것으로 보이며 이러한 학생들의 지구계 이해는 단어라는 형식적 언어의 형태보다는 시각적 심상인 그리기로 더 잘 표상되었다. 지구계 하위계 간의 상호작용에서 학생들의 부정적 이미지가 표상되었다.

• 한국지구과학회지
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• 제41권4호
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• pp.391-404
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• 2020

This study identified and examined earth science education department programs in Korea. Major courses provided by 11 universities and their course requirements were analyzed, and the main research results are as follows. First, many basic courses, other major requisite, and elective courses are provided in geology, astronomy, and atmospheric science. oceanography, geophysics, earth environmental science, and natural disaster and energy resources had fewer major requisite courses provided in addition to basic courses, and few elective courses were offered. Second, many courses in science education focused on earth science, while others focused on general science and there were few courses that covered education theory regarding the specific subject. Third, science course application requirements emphasized the understanding of science in general or of earth science specifically. From the above results, additional studies are proposed to reflect on the current state and supplement these programs.

• 한국미생물학회:학술대회논문집
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• 한국미생물학회 2009년도 International Meeting of the Microbiological Society of Korea
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• pp.67-67
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• 2009

• 한국컴퓨터정보학회논문지
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• 제15권10호
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• pp.79-86
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• 2010

본 논문은 항공기의 비행정보를 효과적으로 시각화하기 위하여 Google Earth를 이용한 시스템 구현에 대해 기술한다. 이 시스템은 Google Earth 에서 제공하는 상세한 위성 영상 정보를 이용하기 위하여 COM API 를 이용하였다. 제안하는 시스템은 항공기의 다양한 장치에서 얻어진 비행정보를 OpenGL을 이용하여 각종 계기판에 표시하고 실제 비행모습을 가시화하기 위하여 Google Earth Map에 연동하여 표시하였다. 본 연구결과는 비행평가 및 개선에 이용될 수 있고 향후, 비행소프트웨어 개발에 적용될 수 있다.

• 한국태양에너지학회 논문집
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• 제26권4호
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• pp.83-91
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• 2006

As a demand for sustainable development rises, the preference for earth house (earth construction) increases gradually. However, there are few data for predicting and evaluating the thermal environment and indoor air quality of earth house. Thus, this study aims to measure thermal properties(thermal conductivity, density and specific heat) and pollutants emission intensities(formaldehyde and volatile organic compounds) of current main earth construction materials and make a comparison between earth and cement construction materials. As results, quantitative thermal properties and pollutants emission intensities of current main earth construction materials are shown.

• 동남아시아연구
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• 제20권3호
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• pp.223-262
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• 2010

This paper has been written to find facts about the image of earth goddess broadly found in the Southeast Asia. The research findings are as follows: Firstly, the image of earth goddess wringing her hair is phenomenally discovered in both Buddhist temple murals and independent shrines in Thailand. This phenomenon is common in other Indochinese Buddhist countries such as Myanmar, Laos and Cambodia. Secondly, the life of Buddha including the story of the victory over Mara is found in such Buddhist canons as Mahavastu, Buddhacarita, Lalitavistara, Nidanakatha and Patamasambodhi. Among the canons, the story of the victory over Mara is described in differently ways. Earth becomes personified as the goddess in later version. The main cause to expel Mara's army also changes from sound to water. Patamasambodhi is most closely associated with the iconography of the earth goddess of Southeast Asia. Thirdly, Vessantara Jataka and Indian ancient customs tell us that a merit maker performs a rite of pouring water on the earth as an evidence for merit-making. This rite is a key to understanding the meaning of the scene where the earth goddess expels Mara's army into the flood by wringing her hair. The earth goddess is personified from the earth upon which the merit water is poured. Water soaked in her hair is the very holy water poured by the Buddha whenever he made a merit in his former lives. The amount of water flowed from the hair of the earth goddess representing the amount of his merit making was so huge and enough to defeat the Mara's army and for the Buddha to reach the Enlightenment. This legend explains the significance of the notion of merit in the Theravada Buddhist countries such as Thailand and Myanmar where the water pouring rites still take place and the images of the hair wringing earth goddess are commonly discovered. Fourthly, the first image of the earth goddess as the witness of merits for the Buddha appeared in some Gandharan Buddhist sculptures in the form of devotional gesture with her both hands pressed together and the upper half of her body above the ground. The appearance is in accordance with the description of her in the Lalitavistara canon. In later periods, the form changed into various types and finally the image of the earth goddess wringing her hair appeared in Southeast Asia around 11 century C.E. Some researchers argue this image form of the earth goddess shows the influence from China or India. However, the arguments are considered to be hypothetical as they have no strong evidence to prove. Finally, the modern image of earth goddess shows richer and more dynamic expression compared with its predecessors. Especially, outstanding is the standing earth goddess images found in the scene of the victory over Mara in many temple murals of central region of Thailand. The earth goddess in her voluptuous body shape is usually depicted as wringing her hair with her arms wide open in a posture of S curve. This appearance strongly reminds us of the postures of Salabhanjika and Tribhanga originated from Indian art. The adoption presumably has been made to signify her fertile and affluent characteristics.

• KIEAE Journal
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• 제7권4호
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• pp.3-8
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• 2007

This study is aimed to apply basic data to planning earth building through analyzing characteristics of earth building. For doing it, we investigated a research paper in advanced countries(New zealand, Australia, etc.) that has been used for earth building standards for a long time, and then we corrected inadequate standards that would apply our earth building environment. As a result, we can devide earth characteristics into three parts that are materials, plan, and maintenance and repair. First, as material selection is very important factor, a general plan is possible to change in accordance with what material is selected. These methods that made mud brick, pressed earth block, rammed earth, cob have been well used during the current 30 years in earth building. Second, the plan is composed of site select and architecture plan. In architecture plan, we should consider from foundation to eaves protection, and in site selection, consider sides of the environment and the social. Third, we should always check a periodical inspection through watchful observation because earth buildings need more time and efforts in maintaining and repairing than others.

• 한국지구과학회지
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• 제23권8호
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• pp.736-736
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• 2002