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- Type:
- Document
- Date Created:
- 1995
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- b83f2ce2912343b559f967dd985da515, 23d738ba88f8333bc39725f9cb5bd0b8, and 12420ec6bd5f758d2b4dea59aabd75a9
- Description:
- In line with a previous research (Ryzhenhov 1993), a Goodwin-like model of fluctuating growth is represented by a three-dimensional competitive-co-operative system of non-linear ordinary differential equations. In particular, a labour income share enhances a rate of growth of a capital-output ratio. This ratio, in its turn, adversely affects the rate of growth of employment ratio. Under an appropriate constellation of coefficients and control parameters, this model is capable of generating long waves modelled by converging fluctuations in the vicinity of the dynamic equilibrium (steady-state growth path) or by closed orbits in the phase space. The analytical and experimental results seem to provide a new base for the conclusion that no intrinsic (exogenous) clustering of innovations is necessary to produce long period fluctuations of economic activity as the flow of invention and innovation is contingent upon the rate of capital accumulation. It is shown that the model is consistent with the Kaldor prominent stylised facts and the Valtukh information value hypothesis.
-
- Type:
- Document
- Date Created:
- 1995
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- b83f2ce2912343b559f967dd985da515, 23d738ba88f8333bc39725f9cb5bd0b8, and 12420ec6bd5f758d2b4dea59aabd75a9
- Description:
- This paper views three feedback maps of the construction activity in Thailand, development by three experienced modelers as three views of the same problem seen from three vantage points that consider different time frames. The three maps possibly appeared since reference mode for the modeling problem was not explicitly stated, while a wide spectrum of historical data was provided to the modelers. System Dynamics attempts to model processes rather than systems and as such a clear statement of the problem is necessary before a model with a unique structure that corresponds to the stated problem can be formulated.
-
- Type:
- Document
- Date Created:
- 1995
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- b83f2ce2912343b559f967dd985da515, 23d738ba88f8333bc39725f9cb5bd0b8, and 12420ec6bd5f758d2b4dea59aabd75a9
- Description:
- System dynamic can play an important role in the education of engineers. On the one hand, students in engineering profit from system dynamics. On the other hand, the system dynamics methodology can be enhanced if we take advantage of the training in physics and mathematics received by the students. It is found that new forms of teaching physics (system physics) support system thinking in a unique way. Advanced courses in engineering disciplines can then build upon modeling and simulation taught early on the curriculum.
-
- Type:
- Document
- Date Created:
- 1995
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- b83f2ce2912343b559f967dd985da515, 23d738ba88f8333bc39725f9cb5bd0b8, and 12420ec6bd5f758d2b4dea59aabd75a9
- Description:
- Increasing competition in markets, rapid advances in technology and changing organisational styles have contributed to a reduction in product life times and development cycles. The telecommunications industry is becoming very complex with a vast array of products and services, many of which are at least partially substitutable for one another. It is becoming increasingly important to have tools which help companies manage their service portfolio. This paper presents an investigation into product life cycles from perspective of customer choice. A simulation model, based on a system dynamics approach, was developed and the impact on market growth of various influences analysed. Results suggest the model may be used to investigate product life cycles and to evaluate and compare commercial strategies. This modelling activity provides a valuable insight into the potential predictability of product life cycles, the amount a telecommunications service provider may influence a product life cycle and the applicability of system dynamical analyses to an organisations commercial strategy
-
- Type:
- Document
- Date Created:
- 1995
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- b83f2ce2912343b559f967dd985da515, 23d738ba88f8333bc39725f9cb5bd0b8, and 12420ec6bd5f758d2b4dea59aabd75a9
- Description:
- This paper addressed the survival of an organization in the fight for competitive advantage. A simple model of a non-standard successful organization has been build using System Dynamics which requires definitions of terms such as Quality, Momentum and Inertia. The non-linear nature of this model gives rise to complex behavior which is explored and analysed. It is concluded that for a company to survive in an ever changing environment it is crucial that it the changes as early as possible and responds to them adequately.
-
- Type:
- Document
- Date Created:
- 1995
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- b83f2ce2912343b559f967dd985da515, 23d738ba88f8333bc39725f9cb5bd0b8, and 12420ec6bd5f758d2b4dea59aabd75a9
- Description:
- This paper suggests integrated teaching approaches of System Dynamics methods for socioeconomic analysis, and Geographic Information System for spatial analysis, in examining, evaluating and planning the limits to urban growth and urbanization of city in the course of Urban Planning by taking Bangkok city as a case study. The course if offered for graduate students in the field of Social Sciences at Kasetsart University. Urban Dynamic Model applied in the study includes interactions of population, capital investment of housing, industry and transportation; economic development in terms of gross provincial product and loan interest rates, and land subsystems. The model aims to illustrate problems of shortage and ineffectiveness of City Planning Act which could not control disorderly urbanization and the over supplies of capital investment of housing and industry. Historical patterns of spatial settlements interacting with changes of a socioeconomic behaviour were illustrated. The policy revising the City Planning Act to limit clearly floor area ratio for building construction within the city in relation to land use categories - commercial areas, residential areas, industrial areas - generates the desired urban growth and urbanization.
-
- Type:
- Document
- Date Created:
- 1995
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- b83f2ce2912343b559f967dd985da515, 23d738ba88f8333bc39725f9cb5bd0b8, and 12420ec6bd5f758d2b4dea59aabd75a9
- Description:
- In the real world, most rate variables are determined by human decision makings. However, in the system dynamics (SD) simulation method, a rate variable is often assigned to difference (or a ratio of the difference) between a level variable and its normal level. Practically, most decision makers have some (fuzzy) rules and apply them depending on its situation. If an intermediate situation among the rules occurs, they interpolate the rules. In this paper, to simulate such human decision makings, we study to apply the fuzzy reasoning to determination method rate variables. We discuss the design of fuzzy reasoning for SD in section 3. We show an application of this method using DYNAMO in section 4.
-
- Type:
- Document
- Date Created:
- 1995
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- b83f2ce2912343b559f967dd985da515, 23d738ba88f8333bc39725f9cb5bd0b8, and 12420ec6bd5f758d2b4dea59aabd75a9
- Description:
- It is an accepted view that technological progress is an extremely important - perhaps the most important- determinant in the growth in output per man. In the discussions of the role of technological change in the economy, one of some important questions naturally arise is how does technological change affect different factors. Traditionally, some technological changes are thought of as "labor intensive", and some as "capital intensive". Whether the technological change is capital intensive or labor intensive, the most important question for developing countries is how the technological change can be expected to improve their national productivity considerably and continuously. Their economies generally depend on foreign exchange earnings from loan and exports, and from now on, they are facing some constraints in the international market.
-
- Type:
- Document
- Date Created:
- 1995
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- b83f2ce2912343b559f967dd985da515, 23d738ba88f8333bc39725f9cb5bd0b8, and 12420ec6bd5f758d2b4dea59aabd75a9
- Description:
- We present a system dynamic model about labor market. The model is based on four equations mainly: demand and supply for labor, and evolution of prices and wages. To find the supply labor we consider characteristics of the labor market in Spain. The simulation of the model allows us to determine the evolution of variables as demand employment, male and female supply labor, wages, prices, inflation and unemployment rate.
-
- Type:
- Document
- Date Created:
- 1995
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- b83f2ce2912343b559f967dd985da515, 23d738ba88f8333bc39725f9cb5bd0b8, and 12420ec6bd5f758d2b4dea59aabd75a9
- Description:
- The goal of this paper is to present some of the latest advances in manufacturing techniques. With that purpose, different production process patterns are modelled. The models are tested to carry out the experiments and further appropriate analysis for several manufacturing techniques. The techniques under study are known as CONWIP, an acronym for Constant Work In Process and the very well known JIT, Just In Time. The analysis is focused to obtain a deeper understanding of the Lean Production.