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126 results for “System Dynamics”
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Research ArticleOpen accessPhrase in the titleStorm Runoff Estimation Using an Object Oriented Approach Based on the Concepts of System DynamicsMaryam Ghashghaie, Saeid Eslamian, Kaveh Ostad-Ali-Askari, Ali Hasantabar AmiriDeveloping nations are imposing the increasing impacts on their bio-resources due in part to their rising population, need to high economic growth and the incorporation of non-native technologies. Usually, watersheds are the major units, which are influenced leading to un-sustainability, specifically from the view point of water resources and hydrologic systems. Relying on a linear causal thinking, most of the … …American Journal of Engineering and Applied Sciences, Vol. 11, Issue 1 · 19 Mar 2018 · 7,687 accessesView PDFCite
Research ArticleOpen accessPhrase in the titleSystem Dynamics Analysis of the Determinants of the Malaysian Palm Oil PriceSahra Mohammadi, Fatimah Mohamed Arshad, Bilash Kanti Bala, Abdulla IbragimovThis paper investigates the major determinants of the Malaysian palm oil price using a system dynamics approach. System dynamics methodology is very relevant for examining the feedback relationships, non-linearity and delays exist in palm oil market. It helps understand the palm oil market structure and the resultant behavior and performance particularly On crude Palm Oil (CPO) price. The simulation results … …American Journal of Applied Sciences, Vol. 12, Issue 5 · 10 Jul 2015 · 7,304 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleMolecular Dynamics Simulation and Analysis of Crystallization System in PVC Tunnel Drain-Pipe at Different TemperaturesZhongwei Hou, Xuefu Zhang, Yuanjiang ZhouAiming at the problem that carbonate and calcium ions are easy to crystallize and precipitate in the drain-pipes of limestone tunnels and then adsorb on PVC pipes in Western China, a "solid-liquid interface model" for the interaction between PVC materials and ions in aqueous solution is established by using the molecular dynamics simulation software materials studio and the microscopic mechanism … …American Journal of Biochemistry and Biotechnology, Vol. 17, Issue 1 · 9 Mar 2021 · 6,279 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleThe Dynamics of Chemical Properties and Soil Microbial Types at Agroforestry System in Supporting Environmental Friendly AgricultureIda Suryani, Sulfiana, Maimuna Nontji, MarlianaAgroforestry is described as the land-use system producing and conserving various agricultural, livestock, and fishery commodities combined with forestry commodities. The research aims to determine the chemical properties of the soil and types of microbial (especially the presence of soil bacterial) in the cocoa farming system. The two types of analysis were conducted: (1) Soil chemical properties included pH, C-organic, … …OnLine Journal of Biological Sciences, Vol. 22, Issue 3 · 16 Aug 2022 · 5,409 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleOn the Dynamics of a General Predator-Prey SystemM. M.A. El-Sheikh, S. A.A. El-Marouf, Z. M. AlaofyProblem statement: In this study a general two dimensional predator-prey model is considered. The dynamic and existence of equilibrium points are studied. Conclusion/Recommendations: Hopf bifurcation is discussed. The existence and uniqueness of limit cycles is proved. Special cases are considered to justify our results. …Journal of Mathematics and Statistics, Vol. 7, Issue 4 · 28 Oct 2011 · 7,322 accessesView PDFCite
Research ArticleOpen accessIn the keywordsA Systems Approach to Study the Malaysian Pepper IndustryIbragimov Abdulla, Fatimah Mohamed Arshad, Muhammad Tasrif et al.Malaysian pepper industry is facing supply constraints which may affect its future. The system dynamics model provides a framework for understanding the dynamics and feedback structure of the Malaysian pepper supply and demand systems. The choice was made based on the ability of this model in capturing complexity and feedback relationship. The pepper model integrates key elements such as area, … …American Journal of Applied Sciences, Vol. 12, Issue 7 · 13 Aug 2015 · 6,754 accessesView PDFCite
Research ArticleOpen accessIn the keywordsIMPACT OF CPO EXPORT DUTIES ON MALAYSIAN PALM OIL INDUSTRYIbragimov Abdulla, Fatimah Mohamed Arshad, B. K. Bala et al.In January 2013, Malaysia reduced the export duty structure to be in line with the Indonesia’s duty structure. Both countries export crude and processed palm oil. Since Malaysia and Indonesia are close competitors and they compete in the same market, a change in export duty rate in one country will affect the other. Indonesia, as the world’s biggest palm oil … …American Journal of Applied Sciences, Vol. 11, Issue 8 · 14 May 2014 · 9,506 accessesView PDFCite
Research ArticleOpen accessIn the keywordsForecasting of Energy Consumption and Pollutant Emission for Road Transportation Policies EvaluationPunravee Kongboontiam, Rungsun UdomsriProblem statement: The energy demand in Thailand has significantly increased over last ten years, particularly in transportation sector. Road transportation contributes the highest energy consumption, 38% of the total energy in the whole country, but it consumes 60% of the total energy usage in the northern region of Thailand. Various chemical pollutants emitted from the road transportation affecting to human … …Energy Research Journal, Vol. 2, Issue 1 · 23 Jan 2012 · 7,720 accessesView PDFCite
Research ArticleOpen accessIn the keywordsSimulation of Solar Radiation SystemM.S. Alam, Sushanta Kumar Saha, M.A.K. Chowdhury et al.In this research work, a mathematical model for simulation of the solar radiation system has been developed by using a system dynamics methodology. Bangladesh is used here for model validation. The simulated results obtained from this model have compared with the experimental results and found reasonably a good agreement. Therefore the performance of the model is to be expected as … …American Journal of Applied Sciences, Vol. 2, Issue 4 · 30 Apr 2005 · 7,695 accessesView PDFCite
Research ArticleOpen accessIn the keywordsPresents the Dynamics at a Basic Anthropomorphic RobotRelly Victoria Virgil Petrescu, Florian Ion Tiberiu PetrescuSerial robots are the most used today and among them, the most common is the basic 3R module, the module that is developed in the vast majority of anthropomorphic serial industrial robots, which today occupies at least 80-90% of the total industrial robots existing worldwide. One studied the kinematics and the forces in this module in other works, with an … …American Journal of Engineering and Applied Sciences, Vol. 13, Issue 2 · 5 May 2020 · 7,178 accessesView PDFCite