• Title/Summary/Keyword: Central place

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Field test of the long-term settlement for the post-grouted pile in the deep-thick soft soil

  • Zou, Jin-Feng;Yang, Tao;Deng, Dong-ping
    • Geomechanics and Engineering
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    • v.19 no.2
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    • pp.115-126
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    • 2019
  • The long-term settlement characteristics for the cast-in-place bored pile in the deep-thick soft soil are investigated by post-grouting field tests. Six cast-in-place bored engineering piles and three cast-in-place bored test piles are installed to study the long-term settlement characteristics. Three post-grouting methods (i.e., post-tip-grouting, post-side-grouting, and tip and side post-grouting) are designed and carried out by field tests. Results of the local test show that decreased settlements for the post-side-grouted pile, the post-tip-grouted pile and the tip and side post-grouted pile are 22.2%~25.8%, 30.10%~35.98% and 32.40%~35.50%, respectively, compared with non-grouted piles. The side friction resistance for non-grouted piles, post-side-grouted pile, post-tip-grouted pile and the tip and side post-grouted pile undertakes 89.6~91.3%, 94.6%, 92.4%~93.0%, 95.7% of the total loading, respectively. At last, the parameters back analysis method and numerical calculation are adopted to predict the long-term settlement characteristics of the cast-in-place bored pile in the deep-thick soft soil. Determined Bulk modulus (K) and a creep parameter (Ks) are used for the back analysis of the long-term settlement of the post-grouted pile. The settlement difference between the back analysis and the measurement data is about 1.11%-7.41%. Long-term settlement of the post-grouted piles are predicted by the back analysis method, and the predicted results show that the settlement of the post-grouted pile are less than 6 mm and will be stable in 30 days.

An Empirical Analysis on Geographic Distribution of Physicians using the Central Place Theory (중심지이론을 이용한 의사의 지역적 분포에 관한 실증분석)

  • 김춘배;강명근;고상백;김한중;유승흠;손명세
    • Health Policy and Management
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    • v.6 no.2
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    • pp.58-90
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    • 1996
  • This study provides an empirical analysis of location competition for demand maximization by central place theory among physicians in nonmetropolitan areas of Korea. The results show that the primary care physicians distribute themselves evenly from urban communities to rural communities. The subspecialists, however, cluster together in major cities rather than decentralize themselves in rural counties. This study establishes the three statistical models : Primary care physicians, subspecialist physicians, and total physicians. Two models of primary care physicians and total physicians have a strong significance in multiple regression analysis (p=-.0001). The primary care model explains approximately 45% of the variation and the total physicians model explains approximately 70% of the variation in physician/1,000 population ratios across national counties. The subspecialist physicians model analysze the tobit regreassion because of the left consored and truncated values(57 cases = 0). In all three models, analysis of the coefficiencts for physician centralization degrees in the 0- to 5- and 5- to 10-km rings around the core county reveals each a positive and negative association betwee these degrees and the physician/1,000 population ratios in the core county. Also, the results provide moderate evidence that the relationship between clinic physicians and community hospitals is competitive, and the relationship between clinic physicians and pharmaceutists is synergistic. This suggests that public policy makers and local self-governing bodies must take an active role to ensure procider availability and the regional health planning in all nonmetropolitan areas of Korea.

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Central Place System of Rural Areas and the Role of Eup-Myun Central Districts in Jeollabuk-do in terms of Living Service Supply (생활서비스 공급 측면에서 본 전라북도 농촌지역의 중심지체계와 읍·면 중심지의 역할)

  • Hong, Hwan-Seong;Lee, Kyung-Chan
    • Journal of the Korean Institute of Rural Architecture
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    • v.23 no.4
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    • pp.88-97
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    • 2021
  • This study aims to derive the life service supply structure in rural areas of Jeollabuk-do through the analysis of the centrality of life service in Eup/Myeon central area. In addition, mutual relationship between the settlement system in rural areas and the current status of the supply of living services in Eup/Myeon areas were also analyzed. In particular, in this study, the entire administrative districts of Jeollabuk-do are intended to be established as a single wide area unit, breaking away from the current status of living service supply at the Si/Gun level. This study mainly conducted with three points. First, the spatial range of Eup/Myeon central districts with centrality in terms of living service supply was established. Second, the hierarchical structure of the living service supply system in the rural areas of Jeollabuk-do was investigated through the analysis of the living service supply level based on the centrality and geographical distribution in Eup/Myeon central districts. Based on the analysis results, the central place system of rural areas in Jeollabuk-do was established in terms of living service supply. Third, through the analysis of the living service functions distributed in the central area, and the type of living service supply by hierarchy was identified.

A Study on the dwellings of the Korean Diaspora of Uzbekistan (우즈베키스탄 거주 고려인의 주생호라에 관한 연구)

  • Lee YoungShim;Lee SangHae
    • Journal of the Korean Home Economics Association
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    • v.42 no.9
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    • pp.1-18
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    • 2004
  • Most of the Korean diaspora who lived in Yunhaeju moved to Central Asia in 1937 following the policy of deportation of Russia. Uzbekistan is the representative place for Korean diaspora to have settled down in Central Asia at that time and mort Korean diaspora in Central Asia are living in Uzbekistan now. Korean diaspora have maintained a traditional way of living for 140 years without a deep relationship with Korea. This study examined the dwellings of the Korean diaspora of Uzbekistan in Central Asia by visiting their houses and conducting interviews. Results of the research were as following: 1) The houses of the Korean diaspora in Uzbekistan in early times consisted of 2-3 bedrooms with Gudle. Gudle is the most traditional element of the Korean diaspora's house and it has been used as a place for gathering family members. 2) Korean diaspora's houses in Uzbekistan were built according to Russian and Uzbek style but most of the Korean diaspora's have a mixed style with traditional Korean elements of living.3) The changing process of planning and building codes of apartments in Uzbekistan is similar to that in other CIS nations and all of Russia. 4) Korean's food style is a mixture of Korean, Russian and Central Asian foods. Kimchi and Jang (bean paste) are essential for most Koreans and most Koreans are making these at home. 5) Most Koreans have maintained a good relationship with the Uzbek people and Koreans are very active in gelling along well with all. This enables them to exchange their culture eventually in various parts. This study could be the first step to supply basic information for the study of the Korean diaspora in Uzbekistan. Deeper research over a wider range is needed in Russia.

A Study of the Hierarchy of the Central Place and the Shopping Area in the Kyeong-ju Si Area (경주시지역 중심지계층과 생활권에 관한 연구)

  • Park, Tae-Hwa;Lee, Jae-Mok
    • Journal of the Korean Geographical Society
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    • v.31 no.3
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    • pp.508-528
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    • 1996
  • The purpose of this study is to analyze the classification of the hierarchy in terms of centrality and the demarcation of shopping areas in the context of goods-purchasing activity in the Kyeong-ju si area (The old Kyeong-ju city and Wol-song Kyn). The basic data for this study include mail questionnaire materials and sources by the on-the-sport survey. The main results of this study are as follows. (1) When forty-two centers within the wide Kyeong-ju area are classified into hierarchies in terms of the functional index and the number of central functions, it is confirmed that there are five hierarchies or classes. Hierachy A is the City of Kyeong-ju. Hierarchy B is the Up of An-gang. Hierarchy Cis made up of three Up of Kam-p'o, Oe-dong and Kon-ch' on. Hierachy D consist of seven Myons and two Ris. Hierarchy E is composed of one Myon and twenty-seven Ris. (2) Hierarchy A has five proper functions of the center. Hierarchy B holds eleven of them. Hierarchy C takes forty-one. Hierarchy D cherish twenty-seven. And hierarchy E has three. Therefor Hierachies C and D have the most functions of all. The threshold populations of the lowest central function is fifty-eight of miscellaneous stores in the central place of Hierarchy E (3) The purchase distance of the central functions of a center becomes farther in the order of barbers' and beauty salons, dental clinics, TV and refrigerator shops, and furniture stores. (4) When the shopping areas are classified according to goods purchase activity, they can be divided into four: the Myon, small Up, big Up, and City areas. Each shopping area can be classified into two categories: the independent areas and compoung areas. The Kyeong-ju city area is the largest city shopping areas of Po-hang and Ull-san are very small.

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Studies on Analysis of Combining Ability in the Mulberry Silkworm, Bombyx mori L.

  • Singh, Ravindra;Rao, D.Raghavendra;Kariappa, B.K.;Premalatha, V.;Dandin, S.B.
    • International Journal of Industrial Entomology and Biomaterials
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    • v.6 no.2
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    • pp.107-113
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    • 2003
  • Analysis of combining ability is a widely used biometrical tool to select promising parents and hybrids, to determine the kinds and relative magnitudes of genetic variability among hybrids as well as to forecast yield attributes in early breeding generations both in plants and animals. Various statistical approaches like Jinks and Hayman (1953), Griffing (1956), Kempthorne (1957) etc. have been extensively applied in plants. These approaches have also been tried in the mulberry silkworm, Bombyx mori L. In the present review, an attempt has been made to collect most of the studies carried out on combining ability in silkworm at one place and make it available to the scientists engaged in sericultural research.

THE ''BAYT AL-HlKMA'' AND SCIENTIFIC ACTIVITY OF CENTRAL ASIAN SCHOLARS IN BAGHDAD

  • ABDUKHALIMOV, BAKHROM
    • Acta Via Serica
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    • v.1 no.1
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    • pp.15-23
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    • 2016
  • The main aim this paper is to investigate the "Bayt al-Hikma" ("The House of Wisdom"), an important medieval centre for translation and science. In this paper, the author attempts to define the establishment, tasks and development of this institution and its place in medieval civilization. In addition, considerable attention is given to the scientific activity of the Central Asian scholars in Baghdad, who migrated there when caliph al-Ma'mun shifted his court from Marw to Baghdad in 819 CE. The paper describes "Bayt al-Hikma" as an important institution for translation and science and describes some of the Central Asian scholars' activities in Baghdad. Despite its brevity, this short overview shows that these scholars had an important influence on the development of medieval sciences.

A Study on Plan for Integrating Train Operation System of the Subway (도시철도 열차운영관리시스템의 통합구축 방안에 관한 연구)

  • Hong Yong-Sik;Kim Wang-Kon;Hong Soon-Heum
    • Proceedings of the KSR Conference
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    • 2003.10c
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    • pp.176-182
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    • 2003
  • Subway is working in the construction of station and wayside equipment which was controlled by central and local control operating system for more efficient management. Traffic controlled by functional integration to be interlocked but each part is constructed and operated individually that is not efficient. Therefore, this paper offer to plan of integrating central and local system in one place of each feild. Functional integration plan will help central and local system to link strengthening. This is also offering to integrating central of an officer in command and integrating local of control station and office.

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