scholarly journals AN INTEGRATED MODEL OF SYSTEM DYNAMICS AND FUZZY COGNITIVE MAPPING APPROACH FOR WASTE MANAGEMENT IN TURKEY

2019 ◽  
Keyword(s):  
Waste Management ◽  
System Dynamics ◽  
Cognitive Mapping ◽  
Environmental Damage ◽  
Dynamics Model ◽  
Fuzzy Cognitive Mapping ◽  
Household Appliances ◽  
Proposed Model ◽  
Sustainability Concept ◽  
Crucial Part

<p>Waste management is one of the most crucial part of the sustainability concept. In Turkey, waste management of the small household appliances under waste of electrical and electronic equipment (WEEE) category still remains as an issue to handle although its production is very large and long-established. The main reason is that many of the household appliances’ wastes are not properly treated in waste management process despite the fact that Turkey is a country which has recovery and collection targets. This outboard of wastes non-treated in an environmentally friendly way, such as recycling or reuse, gives rise to environmental damage. The aim of this paper is to integrate a system dynamics and fuzzy cognitive mapping model in order to evaluate and develop recovery options of small household appliances’ wastes which are not treated according to the regulations in Turkey. The first part of the proposed model is to build a system dynamics model by developing recovery options for small household appliances’ waste management while the second part is to evaluate the relations between supporting factors of recovery options by using Fuzzy Cognitive Mapping.</p>

Unveiling the dynamics of social credit determinants using fuzzy cognitive mapping and system dynamics

2021 ◽  
Author(s):  
Leandro F. Pereira ◽  
Ricardo J. C. Correia ◽  
Fernando A. F. Ferreira ◽  
Pedro F. Falcão ◽  
Renato L. Costa
Keyword(s):  
System Dynamics ◽  
Cognitive Mapping ◽  
Fuzzy Cognitive Mapping ◽  
Social Credit

Analysis of the Granularity of Task Decomposition in Enterprise Alliance Based on System Dynamics

2011 ◽  
Vol 314-316 ◽  
pp. 487-491
Author(s):  
Xian Zhang
Keyword(s):  
Qualitative Analysis ◽  
System Dynamics ◽  
System Dynamics Model ◽  
Key Factors ◽  
Dynamics Model ◽  
Task Decomposition ◽  
Proposed Model ◽  
Product Manufacturing ◽  
Manufacturing Time ◽  
Dynamics Method

The influence brought by the granularity of task decomposition on the key factors of enterprise aliance was studied based on system dynamics method. These factors includs inter-restriction, product manufacturing time, collaboration fee, Alliance leader benefit, capability and compatibility. Causality diagram and system dynamics model were established for these factors. This paper also developed a simulation program for the granularity of task decomposition based on the system dynamics model and validated the effectiveness of the proposed model by a qualitative analysis. The results show that it is a workable method to research the granularity of task decomposition in enterprise aliance using system dynamics theory.

scholarly journals A fuzzy cognitive mapping-system dynamics approach to energy-change impacts on the sustainability of small and medium-sized enterprises

2020 ◽  
Vol 256 ◽  
pp. 120154 ◽  
Author(s):  
Inês P.C. Pereira ◽  
Fernando A.F. Ferreira ◽  
Leandro F. Pereira ◽  
Kannan Govindan ◽  
Ieva Meidutė-Kavaliauskienė ◽  
...  
Keyword(s):  
System Dynamics ◽  
Cognitive Mapping ◽  
Energy Change ◽  
Fuzzy Cognitive Mapping ◽  
Mapping System

Simulation of design changes impact in healthcare construction projects using system dynamics

2020 ◽  
Author(s):  
Dina Atef Saad ◽  
Farouk Gharib ◽  
Moheeb El-Said
Keyword(s):  
System Dynamics ◽  
Construction Projects ◽  
Ripple Effect ◽  
Dynamics Model ◽  
Multiple Stakeholders ◽  
Cost Overruns ◽  
Design Changes ◽  
Proposed Model ◽  
Time Extension ◽  
Catch Up

Design changes (DC) contribute significantly to construction projects’ delays and cost overruns. Many research efforts tackled DCs management, yet with less efforts in healthcare construction (HC) projects which involve multiple stakeholders including medical users and require meeting engineering and medical specifications. Therefore, a new system dynamics model that simulates HC environment, considering engineering and medical factors that can potentially trigger DCs, was developed. It simulates, as well, DCs’ ripple effect in inducing further DCs due to: errors encountered while processing the DCs, and time extension which make the project vulnerable to DCs to catch up with the latest medical advancements. Using a real HC project, the proposed model is validated, and a sensitivity analysis has been conducted to identify the most sensitive factors to DCs. Thus, the new SD model is a useful tool to allow proactive DC management and sound decision-making in order to maintain the planned project performance.

scholarly journals A System Dynamics Model of the Modal Shift from Road to Rail: Containerization and Imposition of Taxes

2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
Bulim Choi ◽  
Su-il Park ◽  
Kang-Dae Lee
Keyword(s):  
System Dynamics ◽  
Carbon Dioxide Emissions ◽  
System Dynamics Model ◽  
Road Transportation ◽  
Dynamics Model ◽  
Modal Shift ◽  
The Past ◽  
Proposed Model ◽  
Policy Measures ◽  
The Impact

Over the past decade, intermodal transport focused on reducing external cost, congestion, and carbon dioxide emissions, which have been caused by road transportation. Many policy measures for the modal shift from road to rail have been introduced to address these problems. This study aims at examining the impact of policy measures on promoting modal shift. In line with the previous research on modal shift, a system dynamics model, which can calculate both expected and real modal share, was developed. The proposed model was applied to the steel industry for steel rolled coils transport in South Korea. Under our analysis conditions, the modal shift by the containerization occurred more rapidly than taxations. The major contributions of this paper are as follows: (1) supporting the model to anticipate the modal shift from road to rail and (2) suggesting new insight to promote the modal shift using containerization.

scholarly journals System crash as dynamics of complex networks

2016 ◽  
Vol 113 (42) ◽  
pp. 11726-11731 ◽  
Author(s):  
Yi Yu ◽  
Gaoxi Xiao ◽  
Jie Zhou ◽  
Yubo Wang ◽  
Zhen Wang ◽  
...  
Keyword(s):  
System Dynamics ◽  
Complex Networks ◽  
Real Life ◽  
Local Information ◽  
System Dynamics Model ◽  
Dynamics Model ◽  
Proposed Model ◽  
Long Time ◽  
Individual Actions ◽  
Interesting System

Complex systems, from animal herds to human nations, sometimes crash drastically. Although the growth and evolution of systems have been extensively studied, our understanding of how systems crash is still limited. It remains rather puzzling why some systems, appearing to be doomed to fail, manage to survive for a long time whereas some other systems, which seem to be too big or too strong to fail, crash rapidly. In this contribution, we propose a network-based system dynamics model, where individual actions based on the local information accessible in their respective system structures may lead to the “peculiar” dynamics of system crash mentioned above. Extensive simulations are carried out on synthetic and real-life networks, which further reveal the interesting system evolution leading to the final crash. Applications and possible extensions of the proposed model are discussed.

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