Consulta: subjectFacets:"Agent-based model"
Registros recuperados: 14
Data/hora: 16/06/2024 11:20:33

Participatory Simulation of Land-Use Changes in the Northern Mountains of Vietnam: the Combined Use of an Agent-Based Model, a Role-Playing Game, and a Geographic Information System
Provedor de dados: 7
Autores: Trung, Tran Ngoc; Vietnam Agricultural Science Institute; trungtnvn@yahoo.com; Boissau, Stanislas; Wageningen University; stanislas.boissau@wur.nl.
Tipo: Peer-Reviewed Reports
Palavras-chave: Participatory simulation; Agent-based model; Role-playing game; Geographic information systems; Land-use change; Mountain agriculture; Vietnam.
Ano: 2005

Increased water charges improve efficiency and equity in an irrigation system
Provedor de dados: 7
Autores: Bell, Andrew Reid; Department of Environmental Studies, New York University; ab6176@nyu.edu; Ward, Patrick S.; International Food Policy Research Institute (IFPRI), Washington, D.C.; p.ward@cgiar.org; Shah, M. Azeem Ali; International Water Management Institute (IWMI), Lahore, Pakistan; Lahore University of Management Sciences (LUMS), Pakistan; a.shah@cgiar.org.
Conventional wisdom in many agricultural systems across the world is that farmers cannot, will not, or should not pay the full costs associated with surface water delivery. Across Organisation for Economic Co-operation and Development (OECD) countries, only a handful can claim complete recovery of operation, maintenance, and capital costs; across Central and South Asia, fees are lower still, with farmers in Nepal, India, and Kazakhstan paying fractions of a U.S. penny for a cubic meter of water. In Pakistan, fees amount to roughly USD 1-2 per acre per season. However, farmers in Pakistan spend orders of magnitude more for diesel fuel to pump groundwater each season, suggesting a latent willingness to spend for water that, under the right conditions, could...
Tipo: Peer-Reviewed Reports
Palavras-chave: Agent-based model; Efficiency; Equity; Irrigation; Pakistan; Water.
Ano: 2016

Population Aggregation in Ancient Arid Environments
Provedor de dados: 7
Autores: Janssen, Marco A; School of Human Evolution and Social Change, Arizona State University; Marco.Janssen@asu.edu.
Human societies have adapted to spatial and temporal variability, such as that found in the prehistoric American Southwest. A question remains as to what the implications are of different social adaptations to long-term vulnerability of small-scale human societies. A stylized agent-based model is presented that captures small-group decision making on movements and resource use in ancient arid environments. The impact of various assumptions concerning storage, exchange, sharing, and migration on indicators of aggregation and sustainability are explored. Climate variability is found to increase the resilience of population levels at the system level. Variability reduces the time a population stays in one location and can degrade the soils. In addition to...
Tipo: Peer-Reviewed Reports
Palavras-chave: Agent-based model; Archaeology; Arid landscapes; Climate variability.
Ano: 2010

Adaptive management in crop pest control in the face of climate variability: an agent-based modeling approach
Provedor de dados: 7
Climate changes are occurring rapidly at both regional and global scales. Farmers are faced with the challenge of developing new agricultural practices to help them to cope with unpredictable changes in environmental, social, and economic conditions. Under these conditions, adaptive management requires a farmer to learn by monitoring provisional strategies and changing conditions, and then incrementally adjust management practices in light of new information. Exploring adaptive management will increase our understanding of the underlying processes that link farmer societies with their environment across space and time, while accounting for the impacts of an unpredictable climate. Here, we assessed the impacts of temperature and crop price, as surrogates...
Tipo: Peer-Reviewed Reports
Palavras-chave: Adaptive management; Agent-based model; Agro-ecosystems; Farmers; Pest.
Ano: 2015

Learning, Signaling, and Social Preferences in Public-Good Games
Provedor de dados: 7
Autores: Janssen, Marco A; Arizona State University; Marco.Janssen@asu.edu; Ahn, T. K.; Florida State University and Korea University; tahn@fsu.edu.
This study compares the empirical performance of a variety of learning models and theories of social preferences in the context of experimental games involving the provision of public goods. Parameters are estimated via maximum likelihood estimation. We also performed estimations to identify different types of agents and distributions of parameters. The estimated models suggest that the players of such games take into account the learning of others and are belief learners. Despite these interesting findings, we conclude that a powerful method of model selection of agent-based models on dynamic social dilemma experiments is still lacking.
Tipo: Peer-Reviewed Reports
Palavras-chave: Laboratory experiments; Public goods; Agent-based model; Learning; Social preferences.
Ano: 2006

Mechanisms of Resilience in Common-pool Resource Management Systems: an Agent-based Model of Water Use in a River Basin
Provedor de dados: 7
The concept of resilience is widely promoted as a promising notion to guide new approaches to ecosystem and resource management that try to enhance a system's capacity to cope with change. A variety of mechanisms of resilience specific for different systems have been proposed. In the context of resource management those include but are not limited to the diversity of response options and flexibility of the social system to adaptively respond to changes on an adequate scale. However, implementation of resilience-based management in specific real-world systems has often proven difficult because of a limited understanding of suitable interventions and their impact on the resilience of the coupled social-ecological system.  We propose an agent-based modeling...
Tipo: Peer-Reviewed Reports
Palavras-chave: Adaptive management; Agent-based model; Amudarya; Diversification; Fisheries; Irrigation; Mechanism; Resilience; River basin; Social-ecological system; Water use.
Ano: 2007

Constructing stability landscapes to identify alternative states in coupled social-ecological agent-based models
Provedor de dados: 7
Autores: Bitterman, Patrick; Department of Geographical and Sustainability Sciences, University of Iowa; patrick-bitterman@uiowa.edu; Bennett, David A.; Department of Geographical and Sustainability Sciences, University of Iowa; david-bennett@uiowa.edu.
The resilience of a social-ecological system is measured by its ability to retain core functionality when subjected to perturbation. Resilience is contextually dependent on the state of system components, the complex interactions among these components, and the timing, location, and magnitude of perturbations. The stability landscape concept provides a useful framework for considering resilience within the specified context of a particular social-ecological system but has proven difficult to operationalize. This difficulty stems largely from the complex, multidimensional nature of the systems of interest and uncertainty in system response. Agent-based models are an effective methodology for understanding how cross-scale processes within and across social...
Tipo: Peer-Reviewed Reports
Palavras-chave: Agent-based model; Resilience; Social-ecological system; Stability landscape.
Ano: 2016

Examining fire-prone forest landscapes as coupled human and natural systems
Provedor de dados: 7
Autores: Spies, Thomas A; USDA Forest Service; tom.spies@oregonstate.edu; White, Eric M.; Oregon State University; eric.white@oregonstate.edu; Kline, Jeffrey D; USDA Forest Service; jkline@fs.fed.us; Fischer, A. Paige; USDA Forest Service; paigefischer@fs.fed.us; Ager, Alan; USDA Forest Service; aager@fs.fed.us; Bailey, John; Oregon State University; john.bailey@oregonstate.edu; Bolte, John; Oregon State University; boltej@engr.orst.edu; Koch, Jennifer; North Carolina State University; kochje@onid.orst.edu; Platt, Emily; Oregon State University; emily.platt@oregonstate.edu; Olsen, Christine S; Oregon State University; christine.olsen@oregonstate.edu; Jacobs, Derric; Oregon State University; jacobsd@onid.orst.edu; Shindler, Bruce; Oregon State University; bruce.shindler@oregonstate.edu; Steen-Adams, Michelle M; University of New England; msteenadams@une.edu; Hammer, Roger; Oregon State University; rhammer@oregonstate.edu.
Fire-prone landscapes are not well studied as coupled human and natural systems (CHANS) and present many challenges for understanding and promoting adaptive behaviors and institutions. Here, we explore how heterogeneity, feedbacks, and external drivers in this type of natural hazard system can lead to complexity and can limit the development of more adaptive approaches to policy and management. Institutions and social networks can counter these limitations and promote adaptation. We also develop a conceptual model that includes a robust characterization of social subsystems for a fire-prone landscape in Oregon and describe how we are building an agent-based model to promote understanding of this social-ecological system. Our agent-based model, which...
Tipo: Peer-Reviewed Reports
Palavras-chave: Agent-based model; CHANS; Coupled human and natural systems; Fire policy; Fire-prone landscapes.
Ano: 2014

Modeling urban expansion policy scenarios using an agent-based approach for Guangzhou Metropolitan Region of China
Provedor de dados: 7
Autores: Tian, Guangjin; State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University; tianguangjin@bnu.edu.cn; Qiao, Zhi; State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University; 386656602@qq.com.
Policy makers and the human decision processes of urban planning have an impact on urban expansion. The behaviors and decision modes of regional authority, real estate developer, resident, and farmer agents and their interactions can be simulated by the analytical hierarchy process (AHP) method. The driving factors are regressed with urban dynamics instead of static land-use types. Agents&amp;#8217; behaviors and decision modes have an impact on the urban dynamic pattern by adjusting parameter weights. We integrate an agent-based model) (ABM) with AHP to investigate a complex decision-making process and future urban dynamic processes. Three policy scenarios for baseline development, rapid development, and green land protection have been applied to predict...
Tipo: Peer-Reviewed Reports
Palavras-chave: Agent-based model; Analytical hierarchy process; Guangzhou; Policy makers; Scenario analysis.
Ano: 2014

A co-modelling process of social and natural dynamics on the isle of Ouessant: Sheep, turf and bikes
Provedor de dados: 5
Autores: Rouan, Mathias; Kerbiriou, Christian; Levrel, Harold; Etienne, M.
An interdisciplinary team has applied the multi-agent system formalism to study shrub encroachment in the Biosphere Reserve on the isle of Ouessant. The main goals were (1) to understand vegetation dynamics, and (2) to represent how main agents, or actors view the dynamics of natural resources in relation to their own living practices. The management strategies established for each type of stakeholders were formalised and the impact of these strategies on biodiversity was analyzed at various temporal and spatial scales. Following a short description of the model, three aspects of the modelling process are discussed in more detail: the use of the chough (Pyrrhocorax pyrrhocorax) population as a representative variable for the interactions between...
Tipo: Text
Palavras-chave: Companion modelling; Agent-based model; Biodiversity; Social dynamics; Shrub encroachment; Biosphere Reserve.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00009/11992/9059.pdf

Price Competition with Particle Swarm Optimization: An Agent-Based Artificial Model
Provedor de dados: 31
Autores: Zhang,   Tong; Brorsen,   B. Wade.
This study instructs an artificial price competition market to examine the impact of capacity constraints on the behavior of packers. Results show when there are cattle left for the lowest bidder after all other packers finishing their procurement, the capacity constraints make the price lower than the perfect competition level.
Tipo: Conference Paper or Presentation
Palavras-chave: Fed cattle market; Agent-based model; Particle swarm optimization; Oligopsony; Livestock Production/Industries; Research Methods/ Statistical Methods; D43.
Ano: 2008
URL: http://purl.umn.edu/6780

Farm Entry Policy and Its Impact on Structural Change Analysed by and Agent-based Sector Model
Provedor de dados: 31
Autores: Mack,   Gabriele; Mohring,   Anke; Zimmermann,   Albert; Gennaio,   Maria-Pia; Mann,   Stefan; Ferjani,   Ali.
The Swiss agent-based model (SWISSland) claims to depict as realistically as possible the 50 000 family farms comprising the whole of Swiss agriculture in all their heterogeneity as regards farm and cost structures as well as farm decision-making behaviour and interactions, with the aim of improving the simulation and forecasting of structural change in agriculture. With the linking of different methods and recorded data, there is a marked increase in the quality of the assessment of policy consequences. Simulations are shown for policy measures which affect only farm entry by cutting socially motivated direct payments for young operators.
Tipo: Conference Paper or Presentation
Palavras-chave: Agent-based model; Sector model; Farm entry; Structural change; Farm Management.
Ano: 2011
URL: http://purl.umn.edu/114374

A review of Multi-Agent Simulation Models in Agriculture
Provedor de dados: 31
Autores: Kaye-Blake,   William; Li,   Frank Y.; Martin,   A. McLeish; McDermott,   Alan; Neil,   Hayley; Rains,   Scott.
Multi-Agent Simulation (MAS) models are intended to capture emergent properties of complex systems that are not amenable to equilibrium analysis. They are beginning to see some use for analysing agricultural systems. The paper reports on work in progress to create a MAS for specific sectors in New Zealand agriculture. One part of the paper focuses on options for modelling land and other resources such as water, labour and capital in this model, as well as markets for exchanging resources and commodities. A second part considers options for modelling agent heterogeneity, especially risk preferences of farmers, and the impacts on decision-making. The final section outlines the MAS that the authors will be constructing over the next few years and the types of...
Tipo: Conference Paper or Presentation
Palavras-chave: Multi-agent simulation models; Modelling; Agent-based model; Cellular automata; Decision-making; Crop Production/Industries; Environmental Economics and Policy; Farm Management; Land Economics/Use; Livestock Production/Industries.
Ano: 2009
URL: http://purl.umn.edu/97165

Influência do preço da mão de obra na sustentabilidade das explorações vitícolas durienses: uma aplicação de modelos baseados em agentes
Provedor de dados: 123
Autores: Matias,João; Cerveira,Adelaide; Santos,Cátia; Marta-Costa,Ana Alexandra.
Resumo: Em Portugal, a disponibilidade de mão de obra tem-se revelado um fator-chave para a viticultura de montanha. Estatísticas mais recentes denotam valores preocupantes que poderão colocar em causa a produção de vinho de qualidade e o atraente conjunto de paisagens vitivinícolas consideradas um recurso potencial para o desenvolvimento do turismo. Por a região duriense ser uma das principais regiões vitivinícolas portuguesas, caracterizada por proeminente e acentuada viticultura de montanha, pretende-se, neste trabalho, simular o comportamento das suas explorações perante alterações do preço de mão de obra, recorrendo-se a modelos baseados em agentes (ABM). Foi ainda usado o software MATLAB para obter funções periódicas ajustadas aos dados...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agent-based model; Setor vitivinícola; Desempenho; Sustentabilidade; Mão de obra.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-20032021000100209