• Title/Summary/Keyword: Top-down approach

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A Study on the Support System for Midship Structural Analysis (선체중앙부해석 지원시스템 개발에 관한 연구)

  • Shin, Hyun-Kyoung;Son, Ho-Cheol;Kwon, Myung-Joon;Song, Jae-Young;Kim, Jong-Hyun;Lee, Jeong-Ryul;Kang, Ho-Seung;Yeon, Kyu-Jin
    • Journal of Ocean Engineering and Technology
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    • v.12 no.3 s.29
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    • pp.86-95
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    • 1998
  • CAD/CAM program developers have made substantial progress in enabling engineers to design, analyze, visualize, visualize, and simulate the performance of structures and systems. Many researchers, however, agree that there is still a way to go before the existing commercial computer software can be used in ship structural analysis to their full potential as solvers which can identify opportunities to reduce man-hours and cut costs. CAD systems used for these works in ship yards are general-purposed and not custom-tailored for ship structures, which force end-users to do tiresome and routine works. The new preprocessor "MeshGen" announced in this study can load several ship types and user-friendly generate their FE meshes employing the object-oriented approach based on the parametric and top-down design. Also "MeshGen" reduces dramatically the time required to prepare CAD models under window-based environments on desktop personal computers and makes it much easier and faster for end-users to change topology and material properties.

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Cameroon : The Effect of Developmental AID on Poverty Reduction and Agro-Rural Development in Sub-Saharan Africa

  • Ntongwe, Edwin Ngome
    • Agribusiness and Information Management
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    • v.4 no.1
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    • pp.1-12
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    • 2012
  • Cameroon, with her numerous resources, still depends on foreign aid while the rate of poverty remains high. Thus, even though historical evidence gives impetus to the impasse over role of developmental aid, from the top down approach through to development as a springboard raising states from the doldrums of poverty, it is still very difficult to draw a substantial relationship between developmental aid and poverty reduction. Against this backdrop of controversy, I find it apt to put Cameroon on a balance scale. Therefore, the purpose of this research is to critically assess the implications of developmental aid on poverty reduction and agro-rural development in Cameroon, using the RUMPI Area Development Project in the South West region of Cameroon as a case study. The study will situate and contextualize the top-down and bottom-up approaches to development within the basis of a Cameroonian perspective, using the Sachs-Easterly debate. The RUMPI Project was introduced with the objective of improving agriculture and empowering the rural woman; thereby fighting poverty within the South West region of Cameroon. Despite its criticism of the barriers to development created by corruption, political pressure and limited use of local and grass-root partnerships, the study, in assessing these failures also tries to outline vital ways in which the project can be improved upon.

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The Effect of Philippine National Wage Variation: The Top-Down Microsimulation Model

  • DIZON, Ricardo Laurio;VILLAHERMOSA, Joan M.
    • The Journal of Asian Finance, Economics and Business
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    • v.8 no.3
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    • pp.155-163
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    • 2021
  • The study aims to investigate the effect on Philippine occupational choice of House Bill No.7787, also known as the National Wage Law, which was filled by the Philippine Congress that mandates the implementation of an across the board minimum daily wage of Php750.00 to all workers in the Philippines. This study had used the Computable General Equilibrium-Top-Down Behavioral Microsimulation approach to determine the effect of National Wage Law on occupational choice. The results of the study revealed that the implementation of said National Wage Law would affect the distribution of labor force across occupational classification such as wage workers, entrepreneurial farming activities workers, and entrepreneurial non-farming activities workers. This has resulted from a higher utility that will be derived from the wage working sector once the National Wage Law will be implemented. Further, among regions in the Philippines, the Calabarzon, National Capital Region, and Central Luzon had recorded the highest number of workers who prefer the wage income sector. The findings of the study also suggest that the Philippine agricultural sector will be greatly affected by the National Wage Law due to the preference of workers to shift from the entrepreneurial farming sector to belong to the wage sector.

A Computable General Equilibrium-Top Down Behavioral Microsimulation on Assessing the Philippine Tax Reform

  • DIZON, Ricardo Laurio
    • The Journal of Asian Finance, Economics and Business
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    • v.8 no.1
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    • pp.543-550
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    • 2021
  • The purpose of the study is to investigate the simulated effects of the Philippine tax reform, which is called Tax Reform for Acceleration and Inclusion Law, on household income and occupational choice. The study utilized the Family Income Expenditure Survey and tax collection as input to Computable General Equilibrium-Top Down Behavioral Microsimulation approach to determine the effect of Philippine tax reform on household income and occupational choice. The results of the study show that the household income in the Philippines will increase due to the implementation of the Philippine tax reform. Also, the study had found that tax reform results drive the household to shift from being farming entrepreneur to salaried workers since the utility derived from being workers is much higher compared to the utility derived from being entrepreneur. The findings of this research suggest that the Philippine Tax Reform for Acceleration and Inclusion Law is beneficial to the household since their income would increase, which will further result to an increase in their capability to buy goods and services. However, the tax reform would also lead to imbalance between the distribution of numbers of workers across sectors such as entrepreneurial farming, entrepreneurial non-farming, and wage sector.

A Study On The Text Recognition Using Artificial Intelligence Technique (인공지능 기법을 이용한 텍스트 인식에 관한 연구)

  • 이행세;최태영;김영길;김정우
    • Journal of the Korean Institute of Telematics and Electronics
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    • v.26 no.11
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    • pp.1782-1793
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    • 1989
  • Stroke crossing number, syntactic pattern recognition procedure, top down recognition structure, and heuristic approach are studied for the Korean text recognition. We propose new algorithms: 1)Korean vowel seperation using limited scanning method in the Korean characters, 2) extracting strokes using stroke width method, 3) stroke crossing number and its properties, 4) average, standard deviation, and mode of stroke crossing number, and 5) classification and recognition methods of limited chinese character. These are studied with computer simuladtions and experiments.

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A Simple Model for RAM Analysis and Its Application to DUPIC Fuel Fabrication Facility

  • Ko, Won-Il;Park, Jong-Won;Lee, Jae-Sol;Park, Hyun-Soo
    • Proceedings of the Korean Nuclear Society Conference
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    • 1996.05b
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    • pp.505-510
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    • 1996
  • A simple model for RAM (Reliability, Availability and Maintainability) analysis and its computer code are developed for application to DUPIC fuel fabrication system. The approach is obtained by linking the allocation model (top-down method) to bottom-up method for RAM analysis. As a result, the availability requirement of subsystem, as well as the buffer storage requirement between processes, are evaluated for the DUPIC facility..

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Realizing FMS Through Distributed Simulation (분산시뮬레이션을 통한 FMS 구축)

  • Kim, Sung-Shick;Bae, Kyoung-Han
    • Journal of Korean Institute of Industrial Engineers
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    • v.18 no.2
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    • pp.31-42
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    • 1992
  • This paper introduces a distuibuted simulation scheme that is useful in the top-down FMS building approach. In the scheme, we first introduce "FMS Shell" that contains basic functions and structure of FMS's. To test a proposed FMS, appropriate features of the proposed FMS are added to the shell, then distributed simulation is performed with the resulting software. This runs like a real system only without hardware devices. An real application case is stated at later part of this paper.

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Derivation of Critical Functions of the Future Attack Helicopter Using QFD (QFD를 이용한 미래 공격헬기의 핵심기능 도출)

  • Lee, Jae-Won;Kwon, Yong-Soo;Ko, Nam-Kyoung
    • Journal of the Korea Institute of Military Science and Technology
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    • v.16 no.3
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    • pp.348-357
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    • 2013
  • This work describes an approach that contributes to derive from mission to critical functions of the attack helicopter under future battle space environment. An existing mission of the attack helicopter is limited to the only shooter oriented functions. In the future environment, mission and its functions of the helicopter might be much expanded. The functions should be derived by the top down approach based on systems engineering approach. In this point of view, this work describes network based future battle environment. From this environment, the missions of the attack helicopter are identified and optimized functions are derived through sequential procedures like from missions to tasks, tasks to activities, and activities to functions. The selected activities are obtained from the tasks using QFD. The weighting scores of the QFD are calculated by the AHP computational procedure. Finally the critical functions are presented through the similar procedure.

Managing Complexity in Object-Oriented Analysis

  • Ine, So-Ran;Youn, Cheong;Misbah, Uddin Mirza;Lee, Kwon-Il;Cha, Seung-Hoon;Byoun, Bo-Gyun;Bae, Doo-Hwan
    • ETRI Journal
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    • v.20 no.2
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    • pp.192-213
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    • 1998
  • The current approaches in Object-Oriented Analysis have limitations on modeling complex real world systems because they require priori knowledge about objects and their interactions before applying them. This may be practical in small systems and systems with clear domain knowledge, but not in large real world systems with unclear domain knowledge. Our approach uses a stepwise refinement technique in a top-down manner to the Object-Oriented Analysis stage with the application of use cases. This approach is especially good for new areas where we do not know all the information in advance. We present the approach with an example of its application to the B-ISDN service modeling and distributed systems.

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A Comparative Study for Estimation of Greenhouse Gas for Local Government`s Sustainable Transport (지속가능교통 평가를 위한 온실가스 배출량 산정 방법론의 지자체 적용 및 비교 연구)

  • Yu, Byeong-Yong;Bae, Sang-Hun;Han, Sang-Yong;Kim, Geon-Yeong
    • Journal of Korean Society of Transportation
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    • v.29 no.5
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    • pp.55-65
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    • 2011
  • In effort to estimate sustainability of the transportation sector, this study conducts a comparative analysis of methodology suggested for measuring greenhouse gas emission. There are two approaches proposed by the UN IPCC: 1) top-down approach (TDA) based on the amount oil sales, and 2) bottom-up approach (BUA) utilizing the velocity of moving source and traffic volume data. The subject areas for analysis were selected based on research results by the Korea Transportation Institute that evaluate traffic sustainability of each local government. Gwacheon-si being one of the top ranked areas in sustainability, and Anseong-si being ranked at the 7th level were analyzed. By the tier 1 methodology, Gwacheon-si and Anseong-si are estimated to create 74,813ton/yr, and 584,125ton/yr of the greenhouse gas emission, respectively. The tier 3 methodology, however, estimates Gwacheon-si and Anseong-si to create 91,462ton/yr, and 163,801ton/yr of the emission, respectively. Comparison of the two estimated emissions shows considerable differences; i.e., the tier 3 method over estimates Gwacheon-si's emission by 22.3% whereas it underestimates Anseong-si's greenhouse gas emission by the factor of about 3.5 compared to the emissions obtained from the tier 1 method. The result from this study implies that the traffic-sustainability-index based grade of each local government can be evaluated differently by the method adopted for measuring greenhouse gas emission.