• Title/Summary/Keyword: Foundation stone

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Optimum Design for Granular Compaction Group Piles Using the Genetic Algorithm (유전자 알고리즘을 이용한 조립토 다짐 군말뚝의 최적설계)

  • Kim, Hong-Taek;Hwang, Jung-Soon;Kim, Chan-Dong;Kang, Yun
    • Journal of the Korean GEO-environmental Society
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    • v.5 no.1
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    • pp.13-25
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    • 2004
  • Granular compaction piles increase the load bearing capacity of the soft ground and reduce the settlement of foundation built on the reinforced soil. The granular compaction group piles also accelerate the consolidation of the soft ground and prevent the liquefaction caused by earthquake using the granular materials such as sand, gravel, stone etc. However, this method is one of unuseful method in Korea. In the present study, the optimum locations of granular compaction group piles using genetic algorithm are proposed. The results were shown that the bearing capacity was increased in the case concentrated on the central part of the group piles. Also, the optimum design for total weight of granular compaction group piles was carried out in consideration of the economical efficiency and parametric studies were performed to examine the effects of parameters at the design of granular compaction group piles.

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Korean Species of Sargassum subgenus Bactrophycus J. Agradh(Sargassaceae, Fucales)with Key and Distribution

  • Lee, In-Kyu;Yoo, Soon-Ae
    • The Journal of Natural Sciences
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    • v.4
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    • pp.11-22
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    • 1991
  • Early studies on Korean Sargassum subjenus Bactrophycus were partly started by Kyetzubg(1843,1849), J. Agardh(1889), Cotton(1906), Yendo(1907) and Okamura(1913, 1914, 1915, 1917). Kang(1966) reported 15 species and 4 subspecies of Sargassum subgenus Bactrophycus and their wide distribution on the Korean coasts in his paper [On the geographical distribution of marine algae in Korea], a foundation stone of Korean phycology. In fact, all the Korean coasts and subtidal zone are inhabited by Sargassum plants. They constitute the most part of the primary production and dominant species of benthic algal vegetation. In 1974, L.K. Lee began to study Sargassum monographically as seaweed resources in Korea. The Koreans eat some species of Sargassum (including Hizikia fusiformis) or use them as fertilizer of the farm near the coast. Among the reported 17 species of Korean Fucales, 12 species belong to Bactrophycus. Yoo(1976) dealt with the descriptions, figures, and a key of 24 species of Korean Fucales plants in her M.S. thesis paper. Among them 16 species belonged to Bactrophycus. Even though the above two works were done with thorough observation of the dry specimens kept in the Pusan Fisheries University Herbarium (most of them were identified by Kang, J.W.) and nation-wide collections, great morphological varieties of these taxa made Lee and Yoo hesitate to publish the paper. Instead, the serial chemotaxonomic studies on the geographical variations of Korean Fucales plants(Yoo and Lee, 1988a, 1988b ; Yoo, et al., 1988) were held to solve the problem, while foreign papers (especially both Drs Tseng's and Yoshida's serial works on Bactrophycus). and authenthic specimens that foreign scholors sent to Korean phycologists induced them to find that several species of Sargassum had been misidentified from the beginning. We introduce here Korean Sargassum subgenus Bactrophycus according to Tseng et al. (1985), mentioning briefly the characteristics of the species, key, and distribution on the Korean coasts.

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From the perspective of female college students majoring in cosmetology Factor analysis on femininity (미용학 전공 여대생 관점에서의 일제 강점기 신여성 패션스타일에서 발산되는 여성성에 대한 요인 분석)

  • Park, Jang-Soon
    • Journal of Digital Convergence
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    • v.18 no.7
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    • pp.405-410
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    • 2020
  • Fashion is a visual means of expressing identity, position, marital status, personal inclination, etc. along with beauty, and it is an important practical cultural heritage that can infer past lifestyle habits. In modern society, fashion such as women's suits, high heels, hats, gloves, handbags, necklaces, etc., as well as beauty such as hair, make-up and nail art. It is a model of innovative women's prize and presented a sample of femininity that responds to the radical development of science and technology in the 21st century. Therefore, it is a driving force for a genuine gender equality society. It serves as a stepping stone for futuristic future design. This study, which analyzed the factors of women's sexuality from the viewpoint of beauty college students in the fashion style of the newcomers, makes it possible to present a sample of women' s sexuality that establishes constructive self - help theory. It is thought that a solid foundation of femininity will be provided.

A Study of the Construction Method of the Pit of Royal Lime Tombs in the Choseon Dynasty (조선왕릉 회격현궁(灰隔玄宮) 축조방법 연구)

  • Kim, Sang-Hyup
    • Journal of architectural history
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    • v.21 no.4
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    • pp.37-46
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    • 2012
  • This study examines the construction method of lime tomb of royal tombs in the Choseon Dynasty based on reference. This was primarily published as "The Five Manners and Courtesy of the Annals of Sejong" as examples, which were followed by the influence of Koryo's culture in the beginning foundation of Choseon, were organized in the time of Sejong; and later, in the time of Sungjong, "The National Five Manners and Courtes y" was published. Such old reference explains the stone materials and construction method of the royal tomb's pit yet there were not many studies regarding the pit of royal tomb in the Choseon Dynasty. And there exists no historical research or reference study in regard to the pit of royal tomb which is formed as a lime tomb. This is believed to be impossible to excavate the royal tomb since ancestral ritual formalities are still given by the descendants and because of our country's culture of giving ancestral ritual formalities which value formalities and filial duty. However, the current excavation of Guhui Tomb, which was the early burial site, was important since it gives an opportunity to look at the shape and structure of lime tombs in the Choseon Dynasty. Thus, this study, based on the excavation of Guhui Tomb, will look into the construction method of the pit of lime tomb and will examine the structure, shape, construction method, etc. of the lime tomb which was formed after the time of Sejo in a way with reference history. This is an important data to learn the construction method of limb tomb of royal tombs in the Choseon Dynasty and is believed to have a very important value as historical materials as to understanding the structure of the pit of royal tombs in the Choseon Dynasty which yet has not been excavated.

Deterioration and Preservation Technique of Wooden Cultural Properties (Part 2) -Biodeterioration of Square Post to Support Wooden Printing Blocks Shelves, Janggeongpanjeon- (목조문화재 열화 및 보존기술에 관한 연구(제2보) -장경각 구조부재중 실내 판가 기둥의 생물적 열화 특성-)

  • Kim, Yeong-Suk;Han, Sang-Mi
    • Journal of the Korean Wood Science and Technology
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    • v.35 no.1
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    • pp.64-72
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    • 2007
  • The biodeterioration behaviors of square post to support the wooden printing blocks Shelves in the Janggeongpanjeon were investigated according to the positions and parts of square post, and environmental conditions. It was found that a high differences of deterioration in the progressing levels of wood decay, according to the positions and parts of square post, and environmental conditions. The decay levels were very high and still progressing in the contacted areas with stone foundation which are about up to 50 cm above it. In the decay type, white rot fungi was mainly affected in the inside of building which mainly made of softwood. The decay in the square posts to support the wooden printing block shelves inside of building was worse in the rear side, compared to front side. The insects was not found in most of square posts excluding the post which was neighboring at the infected round column by insect.

A Study of the participation experiences of the Self-Sufficiency Program : Focusing on participants in Self-Sufficiency Program (자활사업 참여경험에 관한 연구 : 자활사업 참여자를 중심으로)

  • Kim, Jaok;Yoo, Taekyun
    • Korean Journal of Social Welfare Studies
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    • v.49 no.2
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    • pp.39-64
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    • 2018
  • The purpose of this study was to understand how participants' experiences of participating in self-sufficiency projects were. To do this, we analyzed phenomenological methods using in-depth interview data of 48 participants from the Central Self-Sufficiency Foundation, which is qualitative data of the "Project for Strengthening Self-Support for the Working Poor". The study revealed 214 meaningful statements and general re-statements, 24 themes, 9 themes cluster, and 5 categories. Participants' experience was found to be forced work, felt alienated from the self-sufficiency business, and could not receive a clear vision for the future. At the same time, the experience of participating is an opportunity for motivation for change in one's own life, and the essence of becoming a stepping stone to move forward for self-reliance has been derived. Based on the results of this study, we proposed a practical policy task to create a positive expectation effect.

Identification of the Marker Genes Related With Chronic Mitral Valve Disease in Dogs

  • Yoon, Byung-Gook;Lee, Dong-Soo;Seo, Kyoung-Won;Song, Kun-Ho
    • Journal of Veterinary Clinics
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    • v.36 no.4
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    • pp.190-195
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    • 2019
  • We aimed to identify genomic variations as well as the marker genes related with chronic mitral valve disease (CMVD) in Canis lupus familiaris using whole genome resequencing, which provides valuable resources for further study. Two ten-year old female Canis lupus familiaris English cocker spaniels were used for this study, one control and one who had been diagnosed as CMVD. For the whole genome resequencing, muscles from the left ventricular wall were collected from each dog. With the HiSeq DNA Shotgun library and $HiSeq^{TM}$ 2000 platform, whole genome resequencing was performed. From the results, we identified 5 million and 6 million variants in gene expression in the control and CMVD-diagnosed subject, respectively. We then selected the top 1,000 genes from the SNP, INS, and DEL mutation and 675 genes among them were overlapped for every mutation between the control and CMVD-diagnosed patient. Interestingly, in both groups, the intron variant (91.16 and 91.18%) and upstream variant (3.10 and 3.08%) are most highly related. Among the overlapped 675 genes, gene ontology for intracellular signal transduction is highly counted in INS, and DEL, and SNPs (35, 33, 31, respectively). In this study, we found that the COL and CDH gene families could be key molecules in identifying the difference in gene expression between control and CMVD-diagnosed dogs. We believe further studies will prove the importance of variants in key molecule expression and that these data will serve as a valuable foundation stone the study of canine CMVD.

A study on the use of a Sabangseok and changes in the structure at the tumulus of the royal tomb during in the J oseon dynasty the 17th and 18th centuries (17~18세기 조선왕릉의 봉릉 구조개선에 따른 사방석(四方石)의 등장과 소멸)

  • Shin, Ji-Hye
    • Journal of architectural history
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    • v.30 no.4
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    • pp.67-78
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    • 2021
  • This is a study on the structural changes of the tumulus and causes setting up a Sabangseok at the front of the tumulus at the royal tomb in the JoSeon dynasty, during the 17th~18th centuries. The Sabangseok was first used in the tumulus of Mongnueng(穆陵) in 1630. It is a multipurpose stone for boundary, foundation of the tumulus and blocking the sliding down of the tumulus. It was set up, when constructing a Yeongneung(寧陵) in 1673. But the vast spill of tumulus soil made it improve structure of the Sabangseok. Consequently, when the Yeongneung was re-constructed, the structure of the tumulus was fundamentally improved. The soil layer on the lime of the subterranean chamber became eliminated. Also the lime of the tumulus and the lime of the subterranean chamber became a united structure. The Sabangseok was still used until 1757 on account of precedents, although it would become unnecessary after structural improvement of the tumulus in 1673. In 1757, Yeongjo(The 21th monarch of the Joseon Dynasty) commanded repeal on the use of the Sabangseok, when constructing the Hongneung(tomb of Queen Jeongseong). The decision and discussions about abolition on the use of the Sabangseok was recorded in Gukjosangryebopyeon.

Analysis of Changes in Vegetation Index Through Long-term Monitoring of Petroglyphs of Cheonjeon-ri, Ulju (울주 천전리 각석의 장기 모니터링을 통한 식생지수 변화 분석)

  • Ahn, Yu Bin;Yoo, Ji Hyun;Chun, Yu Gun;Lee, Myeong Seong
    • Journal of Conservation Science
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    • v.37 no.6
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    • pp.659-669
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    • 2021
  • In this study, vegetation index, the vegetation index calculated based on hyperspectral images was used to monitor Petroglyphs of Cheonjeon-ri, Ulju from 2014 to 2020. To select suitable the vegetation index for monitoring, indoor analysis was performed, and considering the sensitivity to biocontamination, Normalized Difference Vegetation Index (NDVI) and Triangular Vegetation Index (TVI) were selected. As a result of monitoring using the selected vegetation index, NDVI increased from 2014 to 2018 and then decreased in 2020, after preservation treatment. On the other hand, TVI was difficult to confirm the tendency during the monitoring. This difference was due to the variation in spectral reflectance according to the photographing conditions by year. Therefore NDVI is less sensitive to spectral reflectance deviation than TVI, so it can be used for monitoring. In order for TVI to be used, however, in-depth study is needed.

A Study on the Regionalism and Temporality of Tuff Architecture in Mokpo -Focusing on the Emergence of Tuff Architecture and the Later Activities of Stonemason Son Yang-dong- (목포지역의 응회암 건축에서 보이는 지역성과 시대성 고찰 -응회암 건축의 생성과 이후 손양동 석공의 활동을 중심으로-)

  • Kim, Soonwung;Seo, Dongchun
    • Journal of architectural history
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    • v.32 no.6
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    • pp.77-88
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    • 2023
  • This research focused on the regional and temporal attributes of tuff architecture in Mokpo, spanning the Japanese colonial period and the post-liberation era. It aimed to uncover the distinct regional and temporal features of tuff architecture by integrating concepts from vernacular architecture and regionalism, framed through a lens of critical regionalism. The study traced the historical progression of tuff architecture in Mokpo within this context. A significant part of the research was an in-depth analysis of four constructions by Son Yang-dong, a renowned technician in post-liberation Mokpo, to closely examine the contemporary relevance and regional significance of his work. Tuff, as an indigenous material, distinctly articulates the local architectural character. In line with regional properties of tuff, the material has adeptly responded to contemporary construction needs. This has laid a foundation for the development of innovative building designs and techniques. Tuff architecture is particularly noted for its exhibition of raw material textures, offering a unique aesthetic that diverges from classical Western architectural styles. Importantly, through the examination of Son Yang-dong's contributions, the study highlights the role of Korean builders in an industry dominated by Japanese influences during the colonial period, underscoring a strong regional identity. As a representation of Mokpo, tuff architecture not only upholds and protects regional identity within the broader scope of Western modernization and Japanese impacts but also plays a role in its progressive enhancement.