GAMMA; a simulation model for ageing, pensions and public finances

To answer policy questions that have intergenerational implications, a computable simulation model should obey four conditions, it should: incorporate long-term demographic developments; include a detailed modelling of the public sector; decompose the population into several generations; account for the behaviour of the various economic agents. This document describes and illustrates a model that meets all these conditions. It is an applied general equilibrium model that is based on generational accounting principles named GAMMA (Generational Accounting Model with Maximizing Agents).

Simulation Model Queuing on Terminal Block M TransJakarta Busway Using PHP

This thesis, discusses queuing theory widely applied in business, industry,transportation and daily activities of another. A queue can occur if the arrivalrate greater than the level of service. In theory there are two queue model queueis a queue model of single-channel and multi-channel queuing model. First thesingle-channel queuing model there is only one service facilities, while inmulti-channel queue more than one service facility.In this thesis, the author will try to provide solutions to these problems byapplying both models to the case of the model queue in Terminal Block MTransJakarta Busway to determine the operating characteristics of queuingmodels are made using simulation techniques or formulas queue. Where is thesolution obtained will be compared to determine the level of service efficiency.In this study we concluded that the operating characteristics completion queuemodel using multi-channel model with simulation techniques is morecomplicated but more efficient

A sand wave simulation model

Sand waves form a prominent regular pattern in the offshore seabeds of sandy shallow seas. A two dimensional vertical (2DV) flow and morphological numerical model describing the behaviour of these sand waves has been developed. The model contains the 2DV shallow water equations, with a free water surface and a general bed load formula. The water movement is coupled to the sediment transport equation with a seabed evolution equation. The domain is non-periodic in both directions. The spatial discretisation is performed by a spectral method based on Chebyshev polynomials. A fully implicit method is chosen for the discretisation in time. Firstly, we validate the model mathematically by reproducing the results obtained using a linear stability analysis for infinitely small sand waves. Hereby, we investigate a steady current situation induced by a wind stress applied at the sea surface. The bed forms we find have wavelengths in the order of hundreds of metres when the resistance at the seabed is relatively large. The results show that it is possible to model the initial evolution of sand waves with a numerical simulation model. Next, we investigate the influence of the chosen turbulent viscosity parameterisation by comparing the constant viscosity model with a depth dependent viscosity. This paper forms a part of a study to investigate the intermediate term behaviour of sand waves

THE PACKING SIMULATION MODEL

The Packing Simulation Model is a microcomputer application program designed for researchers, extension personnel, bankers, packing managers, or other specialists who plan the operations of a packing facility or simulate its financial performance. PACKSIM produces pro forma financial statements for packing facilities based on flexible crop mixes and packing assumptions. Variations can be made in the product harvest schedule, price, quality, quantity, input costs and requirements, packing efficiency, overhead, and loan terms.Research and Development/Tech Change/Emerging Technologies,

System Dynamics Simulation Model for Cardiovascular Heart Disease Risk Factors - Smoking and Alcohol Intake

Detecting diseases at early stage can help to overcome and treat them accurately. Identifying the appropriate treatment depends on the method that is used in diagnosing the diseases. The incidence of cardiovascular heart disease (CVD) has been increasing steadily and so too its associated mortality. System Dynamics is appropriate methodology for Modelling and Simulation. The Expert knowledge about risk factors for CVD was elicited through interview and literature search. Two CVD risk factors Smoking and Alcohol Intake were analyzed by the proposed decision support system developed with System Dynamics Simulation software (iThink V9.0.2 ),used for the design, implementation and evaluation of the system. The proposed framework would be particularly useful for researchers in the field but also for medical practitioners and developers of medical decision support systems

Advanced Space Shuttle simulation model

The effects of atmospheric turbulence in horizontal and near-horizontal flight during the return of the Space Shuttle are important for determining design, control, and pilot-in-the-loop effects. A nonrecursive model (based on vonKarman spectra) for atmospheric turbulence along the flight path of the Shuttle Orbiter has been developed which provides for simulation of instantaneous vertical and horizontal gusts at the vehicle center-of-gravity and also for simulation of instantaneous gust gradients. Based on this model the time series for gusts and gust gradients have been generated and stored on a series of magnetic tapes which are entitled Shuttle Simulation Turbulence Tapes (SSTT). The time series are designed to represent atmospheric turbulence from ground level to an altitude of 120,000 meters. A description of the turbulence generation procedure is provided, the results of validating the simulated turbulence are described, and conclusions and recommendations are presented. Appendices provide tabulated one-dimensional vonKarman spectra, a discussion of the minimum frequency simulated, and the results of spectral and statistical analyses of the SSTT

Simulation model ofconsumer decision making

In this paper a simulation model is presented, which by means of a cellular automaton allows us to analyze the process of decision making by consumers. The model takes into account the influence of the neighborhood, as well as of advertising. It works on the basis of a two-dimensional cellular automaton with a von Neumann neighborhood.model, cellular automaton, consumer behavior

MARKOV INTERTEMPORAL LAND USE SIMULATION MODEL

Land Economics/Use,