• Title/Summary/Keyword: Settlement analysis

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A Case Study on the Reinforcement of Existing Damaged Geogrid Reinforced Soil Wall Using Numerical Analyses (수치해석을 이용한 기존 피해 보강토 옹벽의 보강에 관한 사례 연구)

  • Won, Myoung-Soo;Langcuyan, Christine P.;Choi, Jeong-Ho;Ha, Yang-Seong
    • Journal of the Korean Geosynthetics Society
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    • v.19 no.1
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    • pp.75-82
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    • 2020
  • There have been often cases of collapse for geogrid reinforced soil (GRS) retaining wall. Hence, social interest in the reinforcement and restoration of the collapsed GRS wall is increasing day by day. However, there are only few researches. For this reason, a series of numerical analyses using the Plaxis 2D program was conducted in this study to analyze the suitable reinforcement methods that can be applied on the existing damaged GRS wall caused by overturning of the modular blocks facing and the surface settlement at the backfill as the results from the design failure. The restoration plan used in this study is composed of two cases: (Case 1) soil nailing reinforcement and reinforced concrete (RC) wall facing construction on the existing damaged GRS wall; and (Case 2) removal of the entire damaged GRS wall and then reconstruction. The results on the internal stability of the GRS wall show that Case 1 obtained a greater safety factor than Case 2 for tensile force while Case 2 had a greater safety factor than Case 1 for pullout failures. Case 1 was found to be more stable than Case 2 in terms of the global slope safety by shear strength reduction method and the external deformation behavior by numerical analysis. In this study, the existing damaged GRS wall which was reinforced using Case 1 method shows more stable external behavior.

Evaluating the perception of logistic firms and shipper on the relationship between contract term and service performance in logistics outsourcing service (물류아웃소싱 서비스에서 계약서 조항과 성과 간 관계에 대한 물류기업과 화주기업의 인식 비교 분석)

  • Kim, Jin-Su
    • International Commerce and Information Review
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    • v.18 no.1
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    • pp.151-178
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    • 2016
  • This study is based on precedent research on contract fairness to prevent irrational contract practices and enable long term mutual interests between logistic firms and shipper. Actual unjust contract examples were identified in order to help create this positive partnership. An analysis on the difference of perspective proved that while the logistics companies believed on the positive effects of the presence of additional expense clauses & potential risk clauses, the very same companies believed that the concretization of procedural & distributional equitability clauses will cause positive effects on the partnership between the logistics companies and the shipper. On the other hand, concretizationof the expense clauses brings about a negative effect for the shipper company. Also, the perspective of a logistics company appears that such results were identical to the empirical study which had a positiveeffect. However, the shipping company had a negative and a rather opposite point of view. These researches prove that there should be an alteration in perception for the shipper company. It is believed that the comparison of the results of this research and the leading researches may provide grounds for thought-provoking suggestions that must be concretized and also for those in need for further settlement for drafting the standardized logistics contract and its logistics.

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The Influence of Self-efficacy of Married Immigrant Women's on Quality of Life - Focusing on the Moderating Effect of Family Support - (결혼이주여성의 자아존중감이 삶의 질에 미치는 영향 - 가족지지의 조절효과를 중심으로 -)

  • Moon, Mu-Hyeon;Han, Jin-Hwan
    • Journal of Digital Convergence
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    • v.16 no.7
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    • pp.165-175
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    • 2018
  • The aim of this study is to examine the effect of self-efficacy of married immigrant women on the quality of life and the moderating effect of family support in the effect relation. For this purpose, the study carried out a questionnaire survey to married immigrant women who attended multi-cultural family support centers in order to take language education and job education. Total 279 were selected as valid samples. The specific analysis results of this study are as follows. Firstly, the self-efficacy of married immigrant women has positive (+) effect on the quality of life. Secondly, the informational support in the family support has negative (-) effect on the quality of life, but evaluative and material support have positive (+) effect. In the interaction with self-efficacy, the emotional support has negative (-) effect, but the interaction with evaluative and material support has positive (+) effect. But, the interaction with informational support has no significant effect on the quality of life. The key factor affecting the quality of life on married immigrant women is the Korean family. Therefore, their quality of life can be enhanced as well as stable settlement in Korea if the families of husbands accept married immigrant women as their family members and support them.

A Study on Present Situation and Development of National Childcare Curriculum (국가수준 보육과정 현황과 발전방안)

  • Yee, Younghwan;Seo, Hyunah;Youn, Jeongjin
    • Korean Journal of Childcare and Education
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    • v.9 no.3
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    • pp.309-342
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    • 2013
  • This study analyzes the development process of national childcare curriculum, the goal and contents of the 3rd Standard Childcare Curriculum for Childcare Center in order to suggest the successful way to improve the 3rd Standard Childcare Curriculum. After its establishment in 2007, significant changes had been made to the Standard Childcare Curriculum in order to improve the quality of childcare: Nuri Curriculum for age 5 in 2011, second revision of Standard Childcare Curriculum in 2012, creation of Nuri Curriculum for age 3-4, revision of Nuri Curriculum for age 5, and third Standard Childcare Curriculum in 2013. The third Standard Childcare Curriculum is specified as infants age 0-1, age 2, and age 3-5(Nuri Curriculum). For a successful settlement of the 3rd Standard Childcare Curriculum, first, we need in depth analysis of the Nuri Curriculum by age classification. Second, there should be an effort to link the Standard Childcare Curriculum with elementary school education in practical manner. Further, we need to solve the payroll gap problem between teachers in charge of Nuri Curriculum and infant classes. Finally, teachers should be given more respect, and equivalent teaching qualification standard should be made between childcare and early childhood education.

A Study on the Relationship between Community Cohesion and Community Participation for the Foundation of Community Welfare Planning (지역사회복지계획의 기반조성을 위한 지역사회응집력과 지역사회참여의 관계에 관한 연구)

  • Kang, Dae-Sun;Ryu, Ki-Hyung
    • Korean Journal of Social Welfare
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    • v.59 no.1
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    • pp.27-53
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    • 2007
  • Until now, the strategies for increasing community participation has been focusing on the administrative legal institutionalization, but these have not brought substantive effects. So, the need of strategies utilizing the community culture which was formed by the residents and community has been issued on recently. The purpose of this study is to explore the strategies utilizing the community culture. So, it was identified the socio-demographic variables affected the community cohesion (community social networks, community solidarity, place-attachment), that is called community spirit and culture. And through path analysis, it was analyzed the relationship among residents' socio-demographic background, community cohesion, and community participation. The findings are as follows. : the community cohesion's three elements altogether affected positively to the community participation. When regarding the residents characteristics, the strategies for increasing the participation relating to community solidarity was most relevant. the socio-demographics affecting to community solidarity are gender, age, the beneficiary, religion, job type, household income, the length of residence. the women was low at level of participation. The most important variables affecting the community cohesion are the age, the residence duration. Based on these results, the relevant strategies or approaches for increasing community participation are as follows. : using and sharing of the aged's community knowledge, making the long term living and final settlement of community residents, increasing and creating the income for the low-income residents, increasing of religious organization and its members' responsibility to community, and the purposeful extension and relevancy of women's participation. Ultimately, this study is to contribute to fomulate the residents- cultural asset driven's community welfare planning.

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The characteristics of Pacioli's Bookkeeping (파치올리 부기론의 특성에 관한 고찰)

  • Yoon Seok-Gon
    • Journal of the Korea Society of Computer and Information
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    • v.10 no.3 s.35
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    • pp.297-306
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    • 2005
  • Compendium of arithmetic, geometry, and proportions and proportionality' that was published in Venice in 1494 has been recognized as the first bookkeeping data in the world. Major characteristics of Pacioli's bookkeeping rules were reviewed in this study as follows: All the necessary particulars for double entry bookkeeping were provided in Pacioli's bookkeeping rules;. List of property was described at the time of start of business; Three major books were used; Details of daily transactions were considered to be important; Strike through was lined at each description in journal books, details of daily transactions, and list of property after entry of ledger; Amount columns were provided and Arabic numerals were used; Annual settlement custom was being initiated; Profit and loss account was prepared at year-end; Trial balance sheet was inevitably described; Books were verified prior to closing accounts; Control account was not established; Financial statements were not prepared and business analysis was made, too; Finished goods inventory was not adjusted; Mark was assigned to books; Inter-office account was prepared; Branch accounts and branch ledgers were prepared; There was entries of trust; Current arrangement was described; The principle 'Cost or market price, whichever is lower basis' was promoted: Petty cash system is explained Checks and bills of exchange are used in bank account. As mentioned, characteristics of Pacioli's bookkeeping rules were reviewed; the signs of necessity for preparation of profit and loss statement and balance sheet is found as well as preparation of trial balance sheet and the rules may be considered as a very excellent one in terms of the bookkeeping on initiating stage of double entry bookkeeping.

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Industrial Fluctuations and Locality of Busan with Records (기록으로 본 부산의 산업변동과 로컬리티)

  • Song, Jung-Sook
    • Journal of Korean Society of Archives and Records Management
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    • v.16 no.2
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    • pp.143-172
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    • 2016
  • This study analyzes the process of growth of Busan from a fishing village to the capital city of South Gyeongsang Province and the central city of transportation and commerce, and an industry with records. The results of the analysis are as follows: after the port opened in 1876, there has been a decline in settlement spaces in Dongnae; on the other hand, there has been an increase in migration spaces around the port of Busan. Waegwan (倭館) nearby Yongdusan Mountain (龍頭山) was changed to the Japanese concession; thus, the number of Japanese moving into Busan had rapidly increased. As a result, the Japanese government carried out reclamation work for securing available lands for the construction of port facilities and other facilities. The Japanese government built public offices and houses, as well as production facilities for daily necessities around the port of Busan. The opening of the Seoul Busan railway (京釜線) and the cross-channel liner between Busan and Shimonoseki (釜關連絡船) led to the growth of Busan and the development of its status. At this time, as the main industry of Busan was trade, Busan had grown as a commercial city. As Busan had grown as a central city of transportation and commerce, the provincial government building of Gyeongsangnam-do (慶尙南道) moved to Busan. Thus, Busan became the central city of local politics and administration. After the Land Survey Project, a large scale of farmers were recruited for low-wage work in the new port. Because of the abolition of the corporation law, Japanese capitalists moved into their colony in Busan. There, large-scale factories, such as the Joseon cotton textile factory, were established. Through this process, the locality of Busan was changed from a fishing village to a commercial city and, finally, to a city of commerce and industry.

Analysis of Piled Raft Interactions on Clay with Centrifuge Test (원심모형실험을 통한 점토지반에서의 말뚝지지 전면기초 상호작용)

  • Park, Dong-Gyu;Choi, Kyu-Jin;Lee, Jun-Hwan
    • Journal of the Korean Geotechnical Society
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    • v.28 no.9
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    • pp.57-67
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    • 2012
  • In the design for piled rafts, the load capacity of the raft is in general ignored and the load capacities of pile are only considered for the estimation of the total load carrying capacity of the piled raft. The axial resistance of piled raft is offered by the raft and group piles acting on the same supporting ground soils. As a consequence, pile - soil - raft and pile - soil interactions, occurring by stress and displacement duplication with pile and raft loading conditions, acts as a key element in the design for piled rafts. In this study, a series of centrifuge model tests has been performed to compare the axial behavior of group pile and raft with that of a piled raft (having 16 component piles with an array of $4{\times}4$) at the stiff and soft clays. From the test results, it is observed that the interactions of piles, soil, and raft has little influences on the load capacities of piles and raft in piled rafts compared with the load capacities of group piles and raft at the same clay soil condition.

Investigation of Pohang Earthquake Liquefaction Using 1D Effective-Stress Site Response Analysis (1차원 유효응력개념의 지반응답해석을 통한 포항지진의 액상화 현상 규명)

  • Ahn, Jae-Kwang;Baek, Woo-Hyun;Choi, Jae-Soon;Kwak, Dong Youp
    • Journal of the Korean Geotechnical Society
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    • v.34 no.8
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    • pp.37-49
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    • 2018
  • Since the observation of ground motions in South Korea, liquefaction manifestation was the first to be observed in Pohang earthquake in 2017 with $M_L$ 5.4. Because liquefaction causes ground settlement and lateral spread damaging in-ground or super structures, various researchers have been analyzing the Pohang liquefaction case history to better understand and predict liquefaction consequence and to prevent future disasters. In prior research at the 2018 EESK conference, a map of Liquefaction Potential Index (LPI), indicating the severity of liquefaction, in Pohang was created and compared with damage observations. The LPI correlated well with the observations, but the severity categorized by LPI range was significantly higher than the actual observations in most regions. The prior LPI map was created evaluating ground motions using the simplified approach. In this research, we perform the effective site response analyses with porewater pressure generation model for the detailed evaluation of liquefaction on the liquefied sites in Pohang. We found that the simplified approach for LPI evaluation can overestimate the severity.

A Study on Method Activation of Construction Management through Investigation of Public Owners' Capability level (공공부문의 발주자 역량 수준 조사를 통한 건설사업관리 활성화 방안 연구)

  • Kim, Sun-Sik;Kim, Ju-Hyun;Lee, Yun-Sun;Kim, Jae-Jun
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • 2007.11a
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    • pp.289-294
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    • 2007
  • It has been 10 years Since December 1996 when CM method was institutionalized by Construction Industry Fundamental law. Even though construction market has been in stagnant of business activities till now, CM in Korea started to be activated by the introduction of CM method i.n public construction. In the end of 2005, the number of CM order's contract is 6.7 times , an amount of CM order's money is 9.2 times more than operation plan of CM system announced in 2001. Therefore, CM market has been dramatically growing. However, it is judged that the shortage of faith in CM project and necessity of CM method are not recognized and study on a owner who affects successful settlement of CM has not been performed. When considering those points, in introduction and practical use of CM, CM is suggested to the field which is necessary for a client through the task performance level research and analysis of a owner who act a important role to activate Construction Management. As result of studying pre-existing papers to i.nvestigate of owner's capability level, the task function of a client is classified into 10 types and a public opinion poll was performed based on the 10 types of function.

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