• Title/Summary/Keyword: Part Consolidation

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Development of Priority Evaluation Framework for IT System Consolidation using Global Single Instance in Hightech Industry (하이테크 분양의 GSI 구현 대상 우선순위 평가 방법 및 적용 방안 연구)

  • Lee, Chi-Hun;Chang, Min-Yong;Seo, Jong-Hyen
    • Journal of the Korea Safety Management & Science
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    • v.11 no.1
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    • pp.175-182
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    • 2009
  • The effort for GSI based IT system consolidation has been continued due to the increase of the system and complication increase of system connection, mainly by the global company. Since successful example of GSI realization by part of developed company affect to Korea, global level IT system consolidation has been examined mainly by the domestic company that have great deal of overseas business. Although they have examined consolidation possibility mainly on R&D, finance, operation management part which is the base part of company management, there are limitation for consolidation realization because of the difference between regional business problem of huge cost needed for consolidation. To overcome these realization limitations, it is necessary to lead risk and cost reduction through stepwise part unity and decide Priority Evaluation Framework for Consolidation target and systematic consolidation strategy. For GSI realization, appropriate distributions of unification time according to target system are needed. In this study, based on easiness and usefulness of consolidation and connection between the targets, evaluation methodology for Priority Evaluation Framework of system consolidation has been developed. Priority Evaluation Framework has been decided by applying developed methodology to global production company of high tech industrial part. Through this methodology, companies can realize successful and stable GSI by investing global resources intensively by Priority Evaluation Framework of consolidation target system.

The Study on Determination of the Coefficient of Terzaghi's Consolidation by Curve Fitting (Curve Fittig에 의한 Terzaghi의 압밀계수 산정방법 연구)

  • Kim, Chan Sik;Eam, Sung Hoon
    • Journal of The Korean Society of Agricultural Engineers
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    • v.56 no.1
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    • pp.101-107
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    • 2014
  • It has been known that Terzaghi's consolidation theory is not well consistent with the consolidation phenomenon on the soft clay ground, but this theory has still been adopted normally in practice because there is no method for estimating the consolidation settlement and rate easier than Terzaghi's theory. It is impossible to map whole part of consolidation settlement vs time curve to the curve of Terzaghi'z average degree of consolidation. If the primary consolidation and the secondary compression are happened same time, it would be useless of trying to find the end of primary consolidation, but it is needed for using Terzaghi's theory that the end of consolidation is determined to the time of beginning consistency between the final settlement analyzed with curve fitting and the experimented consolidation settlement.

Analysing the Impact of City-County Consolidation on Promotion Practices of Local Government Employees : Application of System Dynamics (시군통합이 자치단체 공무원 승진에 미치는 영향분석 : 시스템다이내믹스의 적용)

  • Choi, Young-Chool
    • Korean System Dynamics Review
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    • v.8 no.1
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    • pp.117-149
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    • 2007
  • This paper aims to analyse the impact of city-county consolidation on promotion practices of local government employees, using system dynamics approach. The cases employed in this study are Cheongju City and Cheongwon County which reached the referendum stage twice but without success. While the idea of consolidating two neighbouring local governments via a merger sounds enticing, some opponents argue that consolidation may cause some problems on the part of local government employees, emphasizing that consolidation could lengthen actual time period needed for local government employees' promotion. The majority of the existing literature on city-county consolidation, however, tends to describe the most successful cases, focusing on the achievements it has made or the political processes associated with it. With this in mind, this paper attempts to identify the impacts of consolidation on the local government employees' promotion time period, utilizing system dynamics approach. It concludes that consolidation could rather shorten the time period of promotion of local government employees concerned from the long term perspective.

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Consolidation Behavior of SCP Improved Ground at Pusan New Port Part 1-1 (부산신항 1-1단계 SCP 개량지반 압밀 특성)

  • JUNG JONG-BUM;YANG SANG-YONG;BYUN JUN-GI
    • Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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    • 2004.11a
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    • pp.51-56
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    • 2004
  • The sand compaction pile (SCP) method, which forms a composite ground by driving sand piles into clay deposit, is the most commonly used soil improvement techniques in many countries for more than 30 years. Installation of sand compaction piles reduces the amount of consolidation settlement and increases the bearing capacity of soft clay deposit. In this paper, field survey conducted to investigated the consolidation behavior of the composite ground improved by SCPs. It is suggested that the measured consolidation velocity is later than design theory, however measured consolidation settlement is higher than design theory.

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Nonlinear consolidation of soft clays subjected to cyclic loading - Part I: theory

  • Yazdani, Hessam;Toufigh, Mohammad Mohsen
    • Geomechanics and Engineering
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    • v.4 no.4
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    • pp.229-241
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    • 2012
  • In this paper, utilizing void ratio-effective stress and void ratio-permeability relationships, a system of two nonlinear partial differential equations is derived to predict the consolidation characteristics of normally consolidated (NC) and overconsolidated (OC) soft clays subjected to cyclic loading. A developed feature of the coefficient of consolidation containing two key parameters is emerged from the differential equations. Effect of these parameters on the consolidation characteristics of soft clays is analytically discussed. It is shown that the ratios between the slopes of e-$log{\sigma}^{\prime}$ and e-log k lines in the NC and OC states play a major role in the consolidation process. In the companion paper, the critical assumptions made in the analytical discussion are experimentally verified and a numerical study is carried out in order to examine the proposed theory.

An Optimization Method for Self-Boring Pressuremeter Holding Test to Determine a Horizontal Coefficient of Consolidation under Partial Drained Soil Conditio (부분배수가 발생하는 지반의 수평압밀계수 결정을 위한 자가굴착식 프레셔메터 유지시험의 최적화 해석법)

  • Kim, Young-Sang
    • Proceedings of the Korean Geotechical Society Conference
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    • 2005.03a
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    • pp.370-375
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    • 2005
  • This paper describes a systematic way of identifying the horizontal coefficient of consolidation for clayey soil under undrained condition and silty soil under partial drained condition by applying an optimization technique to the early part of dissipation data measured from the self-boring pressuremeter strain holding test. An analytical solution developed by Randolph & Wroth (1979) was implemented in normalized form to express the build-up and dissipation of excess pore pressures around a pressuremeter as a function of the rigidity index. Horizontal coefficient of consolidation was determined by minimizing the differences between theoretical and measured excess pore pressure curves using optimization technique. It was found that the proposed optimization technique can evaluate in-situ horizontal coefficient of consolidation rationally, which is similar with that obtained from the piezocone dissipation test. Furthermore, proposed method can evaluate appropriate coefficient of consolidation for soil under partially drained condition.

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A Study of Design for Additive Manufacturing Method for Part Consolidation to Redesign IoT Device (IoT 기기 재설계를 위한 적층제조를 활용한 부품병합 설계 방법에 대한 연구)

  • Kim, Samyeon
    • Journal of Internet of Things and Convergence
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    • v.8 no.2
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    • pp.55-59
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    • 2022
  • Recently, IoT technology has great attention and plays a key role in 4th industrial revolution in order to design customized products and services. Additive Manufacturing (AM) is applied to fabricate IoT sensor directly or IoT sensor embedded structure. Also, design methods for AM are developing to consolidate various parts of IoT devices. Part consolidation leads to assembly time and cost reduction, reliability improvement, and lightweight. Therefore, a design method was proposed to guide designers to consolidate parts. The design method helps designers to define product architecture that consists of functions and function-part relations. The product architecture is converted to a network graph and then Girvan Newman algorithm is applied to cluster the graph network. Parts in clusters are candidates for part consolidation. To demonstrate the usefulness of the proposed design method, a case study was performed with e-bike fabricated by additive manufacturing.

Spatial Variation of Void Ratio and Permeability by Smear and Its Changing Behavior during Consolidation :Part I. Physical Model Test and Analysis (스미어로 의한 점성토 지반의 간극비 및 투수계수의 위치별 차이와 압밀 중 변화 거동에 대한 연구 : Part I. 실험 및 거동 분석)

  • Yune, Chan-Young;Son, Dae Jin;Chun, Sung-Ho;Chung, Choong-Ki
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.29 no.4C
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    • pp.137-144
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    • 2009
  • In this research, the ground with smeared zone was reconstructed using the large consolidation test apparatus. And the reconstituted kaolinite samples at different locations were retrieved for the oedometer test. From the oedometer test results the permeability- void ratio-effective stress behavior was investigated. Based on the experimental analysis, spatial differences of permeability according to the drainage distance by both smear and radial drainage consolidation reduced as the consolidation proceeds and eventually disappeared in normally consolidated region. And the spatial variation of permeability by radial drainage consolidation showed larger differences in smaller extent than the spatial variation of permeability by smear.

Nonlinear consolidation of soft clays subjected to cyclic loading - Part II: Verification and application

  • Yazdani, Hessam;Toufigh, Mohammad Mohsen
    • Geomechanics and Engineering
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    • v.4 no.4
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    • pp.243-249
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    • 2012
  • In the companion paper, the nonlinear consolidation of soft clays subjected to cyclic loading was analytically investigated. This paper reports the results of an experimental program conducted to verify some critical assumptions made in the analytical study. It, also, includes a numerical study carried out to examine the capability of the proposed theory to determine the consolidation characteristics of soft clays subjected to cyclic loading. Results show that the permeability of the soft clays does not significantly change during the cyclic loading. It is also shown that, compared to the Terzaghi's solution for a linear clay, the inherit nonlinearity of the clay tends to decrease the degree of consolidation due to the smaller rate of dissipation in the excess pore water pressure.

Estimation of Over Consolidation Ratio in Southern Coasts (남해안 지역의 과압밀비에 대한 평가)

  • Kang, Seokbeom;Heo, Yol;Bae, Wooseok
    • Journal of the Korean GEO-environmental Society
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    • v.13 no.4
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    • pp.93-104
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    • 2012
  • Efforts to understand and develop reasonable analysis methods for the uncertainty of ground have been made since the 20th century, and the concept of safety factor has been used. However, this concept has limitation in measuring the relative reliability of ground structures because the representative values of the actually used factors have uncertainty. Nevertheless, there is no method to completely remove uncertainty. In most cases, the ground investigation results in Korea are not enough for applying such statistical methods. Furthermore, performing a design without accurate investigation of consolidation state even though consolidation characteristics such as settlement and consolidation velocity vary greatly by the consolidation history can lead to many problems. Therefore, in this paper, as part of the effort to reduce the uncertainty of design around over consolidation ratio among the consolidation factors, the consolidation state was assessed on the basis of the results of high-quality laboratory tests that were performed in Gwangyang and Busan in the southern coast of Korea. Furthermore, consolidation characteristics such as over consolidation ratio by depth were proposed for different regions through statistical processes such as the test of normality and the removal of abnormal values to reduce the uncertainty of design parameters.