• Title/Summary/Keyword: time-consistency

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Consideration to the Depreciation Method using Accumulated Depreciation Rate Function (누적감가상각비율함수를 이용한 감가상각방법에 대한 고찰)

  • Sohn, Jin-Hyeon
    • The Journal of the Korea Contents Association
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    • v.9 no.1
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    • pp.304-311
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    • 2009
  • This article proposes a new time-based depreciation method using the accumulated depreciation rate function. The method can systematically compute the depreciation charge of each period, in every case where the charge is constant or decreasing or increasing, and solve the problems of depreciation methods currently used, by obtaining the accumulated depreciation charge at any given time. We can choose diverse rational depreciation types for the characteristic of every asset with the new method, and compute the depreciation charge with consistency in all cases where assets are owned for partial period.

Statistical approach to a SHM benchmark problem

  • Casciati, Sara
    • Smart Structures and Systems
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    • v.6 no.1
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    • pp.17-27
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    • 2010
  • The approach to damage detection and localization adopted in this paper is based on a statistical comparison of models built from the response time histories collected at different stages during the structure lifetime. Some of these time histories are known to have been recorded when the structural system was undamaged. The consistency of the models associated to two different stages, both undamaged, is first recognized. By contrast, the method detects the discrepancies between the models from measurements collected for a damaged situation and for the undamaged reference situation. The damage detection and localization is pursued by a comparison of the SSE (sum of the squared errors) histograms. The validity of the proposed approach is tested by applying it to the analytical benchmark problem developed by the ASCE Task Group on Structural Health Monitoring (SHM). In the paper, the results of the benchmark studies are presented and the performance of the method is discussed.

Rheological Properties of Bread Containing Lotus Leaf Powder (연잎 분말을 첨가한 식빵의 유변학적 특성)

  • Lee, Hyun-Joo
    • The Korean Journal of Community Living Science
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    • v.26 no.1
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    • pp.135-143
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    • 2015
  • This study investigates the rheological properties of bread containing lotus leaf powder, added to the bread bases at 1%, 2%, and 3% concentrations. Physical properties of bread with lotus leaf powder were tested using the rapid viscoanalyzer (RVA), a farinogram, an alveogram, and a rheofermentometer. The initial pasting temperature increased with an increase in lotus leaf powder, whereas peak viscosity and, the peak time decreased. According to the farinogram test, consistency and water absorption increased with an increase in the ratio of lotus leaf powder. The p value of the alveogram increased with an increase in lotus leaf powder, whereas L and G values decreased. The fermentation time of the dough increased with an increase in the ratio of lotus leaf powder. The results suggest the potential development of bread containing functional ingredient such as lotus leaf powder based on the rheological properties identified in this study.

Database for an Integrated Structural Design of Buildings (건축구조설계의 통합시스템을 위한 데이타베이스의 구축)

  • 김이두;최창근
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 1991.04a
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    • pp.50-55
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    • 1991
  • This paper presents database technique for an computer-integrated structural design system of buildings. Network database designed to support all the processes of structural design, such as, planning, modelling, analysis, member design and redesign processes etc. stores all information from user input and system results effectively and so provides centeral communication area between applications. The user interface wi th interactive and batch modes plays roles of building modeler including conventional pre-processor and post-processor. The concepts of 'Planar Surface Modeling' and 'Geometry Zoning' are defined for easy construction of building model. The concept presented in this paper will save the time and memory required for model generation and contribute to data consistency, thus leave a designer more time actually performing the analyses and interpreting the results. The formulation of automating the process of bulilding model ins and structural analysis is the key to study.

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Setting and Strength Properties of Mortar Containing Steel Furnace Slag Dust

  • Choi, Yun-Wang;Chung, Jee-Seung;Moon, Dae-Joong;Shin, Hwa-Cheol;Jang, Lee-Duck
    • Proceedings of the Korea Concrete Institute Conference
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    • 2003.05a
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    • pp.193-196
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    • 2003
  • In this paper, the experimental investigation for the setting properties of cement paste, the consistency and strength properties of mortar with steel furnace slag dust was performed and compared with those of cement paste and mortar with ground granulated blast furnace slag. When steel furnace slag dust was replaced with normal portland cement, setting time and flow value indicated to good results like as mortar with ground granulated blast furnace slag. However, mortar with steel furnace slag dust expressed to appreciably strength devaluation according to containing ratio, and did not indicate the pozzolanic reaction like as ground granulated blast furnace slag.

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A Scheduling method of Real-Time Database for an Effective Transaction Processing on Networks (통신망 상의 효과적인 트랜잭션 처리를 위한 시시간 데이터베이스 스케줄링 기법)

  • 안우영;임해철
    • Proceedings of the Korean Information Science Society Conference
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    • 1998.10b
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    • pp.214-216
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    • 1998
  • 최근에, 많은 트래픽이 발생하는 통신망 환경에서의 실시간 데이터베이스를 위한 효율적인 트랜잭션 스케줄링과 다양한 동시성 제어 프로토콜들이 제안되고 있다. 그러나 이 연구들은 통신망 자체를 단순한 불변 지연 서버(constant-delay-server)로 모델 하거나 또는 기존의 데이터베이스 시스템을 통신망 환경하의 실시간 데이터베이스 시스템으로 단순하게 확장함으로써 여러 문제점을 갖고 있다. 본 논문에서는 응용 서비스들의 부하에 E라 다양하게 변화되는 통신망의 상태와 성능을 사전에 감지할 수 있도록 하기 위한 트래픽 감시자(traffic monitor)를 두어, 이 트래픽 감시자로부터 얻어지는 정보를 트랜잭션 스케줄링에서 활용할 수 있도록 데이터베이스 모듈들을 구성하여 미래의 통신망 환경에 적절하게 대처할 수 있는 실시간 데이터베이스(RTDB: Real-Time DataBase)를 구축한다. 본 논문에서 제안된 실시간 데이터베이스의 트랜잭션 스케줄링 기법은 통신망에서의 트랜잭션 예상 실행시간을 보다 더 정확하고 빠르게 예측 할 수 있다. 따라서 통신망의 서로 다른 사이트에 분할, 저장되어 있는 데이터베이스 정보를 호출하려는 많은 트랜잭션들이 데이터-일관성(data-consistency)을 유지하면서도 마감시간 이내에 완료될 수 있다. 또한 이미 마감시간을 초과한 트랜잭션들은 예상 실행시간이 작은 것부터 처리하도록 함으로써 시스템 전체의 트랜잭션 처리율(throughput)을 향상시킨다.

A Study on the Heuristic Algorithm for n/m Flow- Shop Problem (n/m 흐름작업의 Heuristic 기법에 관한 연구)

  • 이근부
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.5 no.6
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    • pp.41-48
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    • 1982
  • This paper analyzed md developed flow - shop sequencing heuristic method. The essence of the heuristic approach is in the application of selective routine that reduce the size of a problem. The advantages of this approach are consistency. Speed, endurance and the ability to cope with more data and larger systems than is humanly possible, In recent years many heuristic procedures have been suggested for the flow - shop sequencing problem. Although limited comparisons of these procedures have been made, a full scale test and evaluation have not been reported previously. The maximum flow - time criterion is selected as the evaluation criterion is selected as the evaluation criterion of flow - shop's efficiency. The author evaluated these 3 heuristic method's performance. By the evaluation of the result, we can see that the modified methods produce a shorter maximum flow - time than the original methods.

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Flow Properties of Traditional Kochujang : Effect of Fermentation Time (숙성기간에 따른 재래 고추장의 유동성 변화)

  • 유병승;최원석;류영기
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.28 no.3
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    • pp.554-558
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    • 1999
  • Flow properties of traditional kochujang at various fermentation times(0~12 weeks) were determined with rotational cylindrical(RC) and serrated plate plate(PP) viscometer. Magnitudes of consistency index(K) of power law model and Cassson parameters(yield stress and viscosity) measured by PP viscometer were higher than those using RC viscometer. All kochujang samples during fermentation were much shear thinning with values of flow behavior index(n) as low as 0.2~0.34. K value and Casson yield stress measured by PP viscometer had good correlations(r=0.94; r=0.91) with fermentation time. No significant changes in flow model parameters measured by RC viscometer were observed for kochu jang during fermentation. Magnitudes of flow model parameters measured by PP viscometer more closely correlated with fermantation times of kochujang than did RC viscometer.

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A Study on characteristics of symbolic spatial representation shown in Zhang Yimous's Films (장이모우 영화에서 나타나는 공간의 상징성에 관한연구)

  • Yun, Na-Ra;Shim, Eun-Ju
    • Proceedings of the Korean Institute of Interior Design Conference
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    • 2007.11a
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    • pp.84-88
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    • 2007
  • Movie has a light, colors, and texture in the space and a design. Movie is a ovation of the 3-dimensional reality with time and space. Just like a movie, a space can also express time, personality of characters and background stories. Symbolization of a space tells philosophy and emotions, making meaning of the space abundant and consistency in entire composition of the space. Expression of beauty through order of space inside proves meaning of space. Think that can do and present to production methodology of space design to universalize ureas through symbolic productions that is based on story.

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Development of a Knowledge-Based System to Establish FMS Scheduling (FMS 일정계획 수립을 위한 지식기반 시스템 개발에 대한 연구)

  • Choi, Young-Min;Oh, Byeong-Wan;Kim, Jin-Yong;Lee, Jin-Gyu
    • Journal of Korean Society for Quality Management
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    • v.22 no.3
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    • pp.161-178
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    • 1994
  • FMS are being installed to improve productivity, manufacturing consistency and flexibility. However, FMS are quite expensive and efforts must be made to avoid the high investment risk. The objective of this paper is to enable the real-time rescheduling under dynamic changes in FMS environment. For this purpose, a KBSS (Knowledge-Based Scheduling System) in FMS environment is developed. This KBSS will meet various requirements of users, for example, to minimize makespan, average flow time, or to maximize machine utilization.

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