2022
Ahmady-Moghaddam, Nima; Osterholz, Daniel; Clemen, Thomas
Implementation and Application of a Base Model for Agent-Based Modelling Situated in Hamburg, Germany Inproceedings
In: Simulation in den Umwelt- und Geowissenschaften (Workshop Müncheberg 2021), pp. 99–110, GI (Gesellschaft für Informatik) Shaker Verlag, 2022, ISBN: 978-3-8440-8551-8.
Abstract | BibTeX | Tags: agent-based model, decision support systems, MARS, model development, multimodal travel, sohh, urban planning
@inproceedings{Ahm2022a,
title = {Implementation and Application of a Base Model for Agent-Based Modelling Situated in Hamburg, Germany},
author = {Ahmady-Moghaddam, Nima and Osterholz, Daniel and Clemen, Thomas},
isbn = {978-3-8440-8551-8},
year = {2022},
date = {2022-04-29},
booktitle = {Simulation in den Umwelt- und Geowissenschaften (Workshop Müncheberg 2021)},
volume = {1},
issue = {1},
pages = {99--110},
publisher = {Shaker Verlag},
organization = {GI (Gesellschaft für Informatik)},
abstract = {Agent-based models (ABMs) that are set in a specific geographic region tend to be rooted in similar geodata to define the setting and, by extension, tend to have a similar representation in their
environments. At the core, their agent types also tend to be similar. For example, ABMs that model a city’s traffic flow are likely populated by representations of vehicles and people as agents, just as ABMs that model the spread of infectious diseases might be populated by people and pathogens as agents. If these data and components that are common to ABMs with similar settings are gathered and implemented in a generalized fashion, the resulting model can potentially be used to develop a wide range of more domain-specific scenarios in the given setting. We refer to such a model as a base model. In this article, we describe the conception and implementation of a base model for the city of Hamburg, Germany. The process of data collection and preparation is outlined, and the portability of the approach to other geographic settings is highlighted. The base model's applicability is demonstrated by using it to create two simulation scenarios, each focused on a different domain and research question. Simulation data are analysed to address the research questions and showcase the base model’s potential. While data availability is one of the main limiting factors of a base model's efficacy, we find that a well-maintained and up-to-date base model can be a valuable tool for modellers and stakeholders, especially when required to make informed decisions under time constraints.},
keywords = {agent-based model, decision support systems, MARS, model development, multimodal travel, sohh, urban planning},
pubstate = {published},
tppubtype = {inproceedings}
}
Agent-based models (ABMs) that are set in a specific geographic region tend to be rooted in similar geodata to define the setting and, by extension, tend to have a similar representation in their
environments. At the core, their agent types also tend to be similar. For example, ABMs that model a city’s traffic flow are likely populated by representations of vehicles and people as agents, just as ABMs that model the spread of infectious diseases might be populated by people and pathogens as agents. If these data and components that are common to ABMs with similar settings are gathered and implemented in a generalized fashion, the resulting model can potentially be used to develop a wide range of more domain-specific scenarios in the given setting. We refer to such a model as a base model. In this article, we describe the conception and implementation of a base model for the city of Hamburg, Germany. The process of data collection and preparation is outlined, and the portability of the approach to other geographic settings is highlighted. The base model's applicability is demonstrated by using it to create two simulation scenarios, each focused on a different domain and research question. Simulation data are analysed to address the research questions and showcase the base model’s potential. While data availability is one of the main limiting factors of a base model's efficacy, we find that a well-maintained and up-to-date base model can be a valuable tool for modellers and stakeholders, especially when required to make informed decisions under time constraints.
environments. At the core, their agent types also tend to be similar. For example, ABMs that model a city’s traffic flow are likely populated by representations of vehicles and people as agents, just as ABMs that model the spread of infectious diseases might be populated by people and pathogens as agents. If these data and components that are common to ABMs with similar settings are gathered and implemented in a generalized fashion, the resulting model can potentially be used to develop a wide range of more domain-specific scenarios in the given setting. We refer to such a model as a base model. In this article, we describe the conception and implementation of a base model for the city of Hamburg, Germany. The process of data collection and preparation is outlined, and the portability of the approach to other geographic settings is highlighted. The base model's applicability is demonstrated by using it to create two simulation scenarios, each focused on a different domain and research question. Simulation data are analysed to address the research questions and showcase the base model’s potential. While data availability is one of the main limiting factors of a base model's efficacy, we find that a well-maintained and up-to-date base model can be a valuable tool for modellers and stakeholders, especially when required to make informed decisions under time constraints.
Lenfers, U. A.; Ahmady-Moghaddam, N.; Glake, D.; Ocker, F.; Weyl, J.; Clemen, T.
Modeling the Future Tree Distribution in a South African Savanna Ecosystem: An Agent-Based Model Approach Journal Article
In: Land, vol. 11, iss. 5, no. 619, 2022, ISSN: 2073-445X.
Abstract | Links | BibTeX | Tags: adaptive behavior, agent-based model, Bushbuckridge, decision support systems, firewood collection, Kruger, MARS, model development
@article{Lenfers2022a,
title = {Modeling the Future Tree Distribution in a South African Savanna Ecosystem: An Agent-Based Model Approach},
author = {Lenfers, U.A. and Ahmady-Moghaddam, N. and Glake, D. and Ocker, F. and Weyl, J. and Clemen, T.},
url = {https://www.mdpi.com/2073-445X/11/5/619},
doi = {10.3390/land11050619},
issn = {2073-445X},
year = {2022},
date = {2022-04-22},
urldate = {2022-04-22},
journal = {Land},
volume = {11},
number = {619},
issue = {5},
abstract = {Understanding the dynamics of tree species and their demography is necessary for predicting future developments in savanna ecosystems. In this contribution, elephant-tree and firewood collector-tree interactions are compared using a multiagent model. To investigate these dynamics, we compared three different tree species in two plots. The first plot is located in the protected space of Kruger National Park (KNP), South Africa, and the second plot in the rural areas of the Bushbuckridge Municipality, South Africa. The agent-based modeling approach enabled the modeling of individual trees with characteristics such as species, age class, size, damage class, and life history. A similar level of detail was applied to agents that represent elephants and firewood collectors. Particular attention was paid to modeling purposeful behavior of humans in contrast to more instinct-driven actions of elephants. The authors were able to predict future developments by simulating the time period between 2010 and 2050 with more than 500,000 individual trees. Modeling individual trees for a time span of 40 years might yield more detailed information than a simple woody mass aggregation. The results indicate a significant trend toward more and thinner trees together with a notable reduction in mature trees, while the total aboveground biomass appears to stay more or less constant. Furthermore, the KNP scenarios show an increase in young Combretum apiculatum, which may correspond to bush encroachment.},
keywords = {adaptive behavior, agent-based model, Bushbuckridge, decision support systems, firewood collection, Kruger, MARS, model development},
pubstate = {published},
tppubtype = {article}
}
Understanding the dynamics of tree species and their demography is necessary for predicting future developments in savanna ecosystems. In this contribution, elephant-tree and firewood collector-tree interactions are compared using a multiagent model. To investigate these dynamics, we compared three different tree species in two plots. The first plot is located in the protected space of Kruger National Park (KNP), South Africa, and the second plot in the rural areas of the Bushbuckridge Municipality, South Africa. The agent-based modeling approach enabled the modeling of individual trees with characteristics such as species, age class, size, damage class, and life history. A similar level of detail was applied to agents that represent elephants and firewood collectors. Particular attention was paid to modeling purposeful behavior of humans in contrast to more instinct-driven actions of elephants. The authors were able to predict future developments by simulating the time period between 2010 and 2050 with more than 500,000 individual trees. Modeling individual trees for a time span of 40 years might yield more detailed information than a simple woody mass aggregation. The results indicate a significant trend toward more and thinner trees together with a notable reduction in mature trees, while the total aboveground biomass appears to stay more or less constant. Furthermore, the KNP scenarios show an increase in young Combretum apiculatum, which may correspond to bush encroachment.
2021
Glake, Daniel; Ritter, Norbert; Ocker, Florian; Ahmady-Moghaddam, Nima; Osterholz, Daniel; Lenfers, Ulfia; Clemen, Thomas
Hierarchical Semantics Matching For Heterogeneous Spatio-Temporal Sources Book Chapter
In: pp. 565–575, Association for Computing Machinery, New York, NY, USA, 2021, ISBN: 978-1-4503-8446-9.
Abstract | Links | BibTeX | Tags: agent-based model. sohh, MARS, Multi-Agent Model, sohh
@inbook{Glake2021a,
title = {Hierarchical Semantics Matching For Heterogeneous Spatio-Temporal Sources},
author = {Glake, Daniel and Ritter, Norbert and Ocker, Florian and Ahmady-Moghaddam, Nima and Osterholz, Daniel and Lenfers, Ulfia and Clemen, Thomas},
url = {https://doi.org/10.1145/3459637.3482350},
doi = {10.1145/3459637.3482350},
isbn = {978-1-4503-8446-9},
year = {2021},
date = {2021-10-26},
pages = {565–575},
publisher = {Association for Computing Machinery},
address = {New York, NY, USA},
abstract = {Spatio-temporal data are semantically valuable information used for various analytical tasks to identify spatially relevant and temporally limited correlations within a domain. The increasing availability and data acquisition from multiple sources with their typically high heterogeneity are getting more and more attention. However, these sources often lack interconnecting shared keys, making their integration a challenging problem. For example, publicly available parking data that consist of point data on parking facilities with fluctuating occupancy and static location data on parking spaces cannot be directly correlated. Both data sets describe two different aspects from distinct sources in which parking spaces and fluctuating occupancy are part of the same semantic model object. Especially for ad hoc analytical tasks on integrated models, these missing relationships cannot be handled using join operations as usual in relational databases. The reason lies in the lack of equijoin relationships, comparing for equality of strings and additional overhead in loading data up before processing. This paper addresses the optimization problem of finding suitable partners in the absence of equijoin relations for heterogeneous spatio-temporal data, applicable to ad hoc analytics. We propose a graph-based approach that achieves good recall and performance scaling via hierarchically separating the semantics along spatial, temporal, and domain-specific dimensions. We evaluate our approach using public data, showing that it is suitable for many standard join scenarios and highlighting its limitations.},
keywords = {agent-based model. sohh, MARS, Multi-Agent Model, sohh},
pubstate = {published},
tppubtype = {inbook}
}
Spatio-temporal data are semantically valuable information used for various analytical tasks to identify spatially relevant and temporally limited correlations within a domain. The increasing availability and data acquisition from multiple sources with their typically high heterogeneity are getting more and more attention. However, these sources often lack interconnecting shared keys, making their integration a challenging problem. For example, publicly available parking data that consist of point data on parking facilities with fluctuating occupancy and static location data on parking spaces cannot be directly correlated. Both data sets describe two different aspects from distinct sources in which parking spaces and fluctuating occupancy are part of the same semantic model object. Especially for ad hoc analytical tasks on integrated models, these missing relationships cannot be handled using join operations as usual in relational databases. The reason lies in the lack of equijoin relationships, comparing for equality of strings and additional overhead in loading data up before processing. This paper addresses the optimization problem of finding suitable partners in the absence of equijoin relations for heterogeneous spatio-temporal data, applicable to ad hoc analytics. We propose a graph-based approach that achieves good recall and performance scaling via hierarchically separating the semantics along spatial, temporal, and domain-specific dimensions. We evaluate our approach using public data, showing that it is suitable for many standard join scenarios and highlighting its limitations.
Nima Ahmady-Moghaddam Ulfia A. Lenfers, Daniel Glake; Clemen, Thomas
Improving Model Predictions—Integration of Real-Time Sensor Data into a Running Simulation of an Agent-Based Model Journal Article
In: Sustainability, vol. 13, no. 13, 2021.
Abstract | Links | BibTeX | Tags: agent-based model, decision support systems, IoT sensors, MARS, model development, multimodal travel, real-time data, simulation correction, smart cities, sohh, urban planning
@article{Lenfers2021,
title = {Improving Model Predictions—Integration of Real-Time Sensor Data into a Running Simulation of an Agent-Based Model},
author = {Ulfia A. Lenfers, Nima Ahmady-Moghaddam, Daniel Glake, Florian Ocker, Daniel Osterholz, Jonathan Ströbele and Thomas Clemen},
editor = {Philippe J. Giabbanelli and Arika Ligmann-Zielinska},
url = {https://doi.org/10.3390/su13137000},
doi = {10.3390/su13137000},
year = {2021},
date = {2021-06-22},
journal = {Sustainability},
volume = {13},
number = {13},
abstract = {The current trend towards living in big cities contributes to an increased demand for efficient and sustainable space and resource allocation in urban environments. This leads to enormous pressure for resource minimization in city planning. One pillar of efficient city management is a smart intermodal traffic system. Planning and organizing the various kinds of modes of transport in a complex and dynamically adaptive system such as a city is inherently challenging. By deliberately simplifying reality, models can help decision-makers shape the traffic systems of tomorrow. Meanwhile, Smart City initiatives are investing in sensors to observe and manage many kinds of urban resources, making up a part of the Internet of Things (IoT) that produces massive amounts of data relevant for urban planning and monitoring. We use these new data sources of smart cities by integrating real-time data of IoT sensors in an ongoing simulation. In this sense, the model is a digital twin of its real-world counterpart, being augmented with real-world data. To our knowledge, this is a novel instance of real-time correction during simulation of an agent-based model. The process of creating a valid mapping between model components and real-world objects posed several challenges and offered valuable insights, particularly when studying the interaction between humans and their environment. As a proof-of-concept for our implementation, we designed a showcase with bike rental stations in Hamburg-Harburg, a southern district of Hamburg, Germany. Our objective was to investigate the concept of real-time data correction in agent-based modeling, which we consider to hold great potential for improving the predictive capabilities of models. In particular, we hope that the chosen proof-of-concept informs the ongoing politically supported trends in mobility—away from individual and private transport and towards—in Hamburg.},
keywords = {agent-based model, decision support systems, IoT sensors, MARS, model development, multimodal travel, real-time data, simulation correction, smart cities, sohh, urban planning},
pubstate = {published},
tppubtype = {article}
}
The current trend towards living in big cities contributes to an increased demand for efficient and sustainable space and resource allocation in urban environments. This leads to enormous pressure for resource minimization in city planning. One pillar of efficient city management is a smart intermodal traffic system. Planning and organizing the various kinds of modes of transport in a complex and dynamically adaptive system such as a city is inherently challenging. By deliberately simplifying reality, models can help decision-makers shape the traffic systems of tomorrow. Meanwhile, Smart City initiatives are investing in sensors to observe and manage many kinds of urban resources, making up a part of the Internet of Things (IoT) that produces massive amounts of data relevant for urban planning and monitoring. We use these new data sources of smart cities by integrating real-time data of IoT sensors in an ongoing simulation. In this sense, the model is a digital twin of its real-world counterpart, being augmented with real-world data. To our knowledge, this is a novel instance of real-time correction during simulation of an agent-based model. The process of creating a valid mapping between model components and real-world objects posed several challenges and offered valuable insights, particularly when studying the interaction between humans and their environment. As a proof-of-concept for our implementation, we designed a showcase with bike rental stations in Hamburg-Harburg, a southern district of Hamburg, Germany. Our objective was to investigate the concept of real-time data correction in agent-based modeling, which we consider to hold great potential for improving the predictive capabilities of models. In particular, we hope that the chosen proof-of-concept informs the ongoing politically supported trends in mobility—away from individual and private transport and towards—in Hamburg.
Clemen, Thomas; Lenfers, Ulfia A; Dybulla, Janus; Ferreira, Sam M; Kiker, Greg A; Martens, Carola; Scheiter, Simon
A cross-scale modeling framework for decision support on elephant management in Kruger National Park, South Africa Journal Article
In: Ecological Informatics, vol. 62, pp. 101266, 2021, ISSN: 15749541.
Abstract | Links | BibTeX | Tags: MARS
@article{Clemenk,
title = {A cross-scale modeling framework for decision support on elephant management in Kruger National Park, South Africa},
author = {Thomas Clemen and Ulfia A Lenfers and Janus Dybulla and Sam M Ferreira and Greg A Kiker and Carola Martens and Simon Scheiter},
url = {https://linkinghub.elsevier.com/retrieve/pii/S1574954121000571},
doi = {10.1016/j.ecoinf.2021.101266},
issn = {15749541},
year = {2021},
date = {2021-05-31},
journal = {Ecological Informatics},
volume = {62},
pages = {101266},
abstract = {Conservation areas, like national parks, are hotspots of social-ecological and social-economic activities. The resulting interactions contribute to an inherent complexity of these systems, making simulation models a vital form of support for their management activities. These models are often unimodal, i.e., limited by design to only one particular question or a specific temporal and spatial scale. We implemented the cross-scale and multi-modal base model MARS KNP for the Kruger National Park, South Africa that combines the agent-based paradigm with a dynamic vegetation model.
As a proof-of-concept, we developed an elephant movement model within MARS KNP to evaluate the base model's decision-support capabilities. The study was mainly focused on the underlying software mechanisms that allow easy integration of multi-scale spatio-temporal data objects. MARS agents can probe, interact with, and modify these objects. We found that this feature is essential for a cross-scale integration of different modeling approaches.
Additionally, we propose a definition of the term ‘base model’ to shorten the provisioning time of decision-support tools.},
keywords = {MARS},
pubstate = {published},
tppubtype = {article}
}
Conservation areas, like national parks, are hotspots of social-ecological and social-economic activities. The resulting interactions contribute to an inherent complexity of these systems, making simulation models a vital form of support for their management activities. These models are often unimodal, i.e., limited by design to only one particular question or a specific temporal and spatial scale. We implemented the cross-scale and multi-modal base model MARS KNP for the Kruger National Park, South Africa that combines the agent-based paradigm with a dynamic vegetation model.
As a proof-of-concept, we developed an elephant movement model within MARS KNP to evaluate the base model's decision-support capabilities. The study was mainly focused on the underlying software mechanisms that allow easy integration of multi-scale spatio-temporal data objects. MARS agents can probe, interact with, and modify these objects. We found that this feature is essential for a cross-scale integration of different modeling approaches.
Additionally, we propose a definition of the term ‘base model’ to shorten the provisioning time of decision-support tools.
As a proof-of-concept, we developed an elephant movement model within MARS KNP to evaluate the base model's decision-support capabilities. The study was mainly focused on the underlying software mechanisms that allow easy integration of multi-scale spatio-temporal data objects. MARS agents can probe, interact with, and modify these objects. We found that this feature is essential for a cross-scale integration of different modeling approaches.
Additionally, we propose a definition of the term ‘base model’ to shorten the provisioning time of decision-support tools.
Clemen, Thomas; Ahmady-Moghaddam, Nima; Lenfers, Ulfia A; Ocker, Florian; Osterholz, Daniel; Ströbele, Jonathan; Glake, Daniel
Multi-Agent Systems and Digital Twins for Smarter Cities Inproceedings
In: Proceedings of the 2021 ACM SIGSIM Conference on Principles of Advanced Discrete Simulation, pp. 45–55, ACM, 2021, ISBN: 9781450382960.
Abstract | Links | BibTeX | Tags: digital twin, IoT, MARS, sohh
@inproceedings{Clemen2021,
title = {Multi-Agent Systems and Digital Twins for Smarter Cities},
author = {Thomas Clemen and Nima Ahmady-Moghaddam and Ulfia A Lenfers and Florian Ocker and Daniel Osterholz and Jonathan Ströbele and Daniel Glake},
url = {https://dl.acm.org/doi/10.1145/3437959.3459254},
doi = {10.1145/3437959.3459254},
isbn = {9781450382960},
year = {2021},
date = {2021-05-01},
booktitle = {Proceedings of the 2021 ACM SIGSIM Conference on Principles of Advanced Discrete Simulation},
volume = {1},
number = {1},
pages = {45–55},
publisher = {ACM},
abstract = {An intelligent combination of the Internet of Things (IoT) and approaches to modeling and simulation is one of the most challenging endeavors for future cities, manufacturing industries, and predictive maintenance. Digital Twins take on a unique role here. However, the question of what a Digital Twin is and what differentiates it from a regular model is still open. We present an experimental setup for integrating an existing simulation model of Hamburg's traffic system with the city's real-time sensor network. The Digital Twin is implemented using the large-scale multi-agent framework MARS. The entire process from the model description to retrieving real-time data from the IoT sensors and incorporating it in the simulation is presented. As a first prototypical example, a multi-modal mobility model was connected to real-world bike-sharing locations in Hamburg. We find that the combination of multi-agent systems and IoT sensors as a Digital Twin shows enormous potential for city planners, policy stakeholders, and other decision-makers. By correcting the course of a simulation via real-time data, the corridor-of-uncertainty that is intrinsic to some simulation models' use can be reduced significantly. Furthermore, any divergence of simulated and sampled data can lead to a deeper understanding of complex adaptive systems like big cities.},
keywords = {digital twin, IoT, MARS, sohh},
pubstate = {published},
tppubtype = {inproceedings}
}
An intelligent combination of the Internet of Things (IoT) and approaches to modeling and simulation is one of the most challenging endeavors for future cities, manufacturing industries, and predictive maintenance. Digital Twins take on a unique role here. However, the question of what a Digital Twin is and what differentiates it from a regular model is still open. We present an experimental setup for integrating an existing simulation model of Hamburg's traffic system with the city's real-time sensor network. The Digital Twin is implemented using the large-scale multi-agent framework MARS. The entire process from the model description to retrieving real-time data from the IoT sensors and incorporating it in the simulation is presented. As a first prototypical example, a multi-modal mobility model was connected to real-world bike-sharing locations in Hamburg. We find that the combination of multi-agent systems and IoT sensors as a Digital Twin shows enormous potential for city planners, policy stakeholders, and other decision-makers. By correcting the course of a simulation via real-time data, the corridor-of-uncertainty that is intrinsic to some simulation models' use can be reduced significantly. Furthermore, any divergence of simulated and sampled data can lead to a deeper understanding of complex adaptive systems like big cities.
2020
Nyambo, Devotha G; Luhanga, Edith T; Yonah, Zaipuna O; Mujibi, Fidalis D N; Clemen, Thomas
Leveraging peer-to-peer farmer learning to facilitate better strategies in smallholder dairy husbandry Journal Article
In: Adaptive Behavior, 2020.
@article{Nyambo2020,
title = {Leveraging peer-to-peer farmer learning to facilitate better strategies in smallholder dairy husbandry},
author = {Devotha G Nyambo and Edith T Luhanga and Zaipuna O Yonah and Fidalis D N Mujibi and Thomas Clemen},
doi = {10.1177/1059712320971369},
year = {2020},
date = {2020-12-01},
journal = {Adaptive Behavior},
keywords = {MARS},
pubstate = {published},
tppubtype = {article}
}
Ocker, Florian J.
Entwicklung eines agentenbasierten multimodalen Verkehrsmodells mit MARS Masters Thesis
Hochschule für Angewandte Wissenschaften Hamburg, 2020.
Abstract | Links | BibTeX | Tags: MARS, Multi-Agent Model, Multimodality, Traffic Simulation
@mastersthesis{Ocker2020,
title = {Entwicklung eines agentenbasierten multimodalen Verkehrsmodells mit MARS},
author = {Florian J. Ocker},
url = {http://localhost/wp-content/uploads/2021/09/ocker-ma-thesis.pdf},
year = {2020},
date = {2020-06-18},
school = {Hochschule für Angewandte Wissenschaften Hamburg},
abstract = {This thesis describes the development of a multimodal traffic model for the MARS system. The proposed model should provide a demand-based choice of different means of transport, the modal types. Therefore the time advantage of different vehicles is compared with each other and with the walking modality. Moreover, the travel time is analysed for a transport needs model in respect to the availabilty and free choice of different modal types.},
keywords = {MARS, Multi-Agent Model, Multimodality, Traffic Simulation},
pubstate = {published},
tppubtype = {mastersthesis}
}
This thesis describes the development of a multimodal traffic model for the MARS system. The proposed model should provide a demand-based choice of different means of transport, the modal types. Therefore the time advantage of different vehicles is compared with each other and with the walking modality. Moreover, the travel time is analysed for a transport needs model in respect to the availabilty and free choice of different modal types.
2019
Weyl, Julius
Developing a generic multi-agent car model to simulate road traffic with MARS Masters Thesis
Hochschule für Angewandte Wissenschaften Hamburg, 2019.
Abstract | Links | BibTeX | Tags: MARS, Multi-Agent Model, Traffic Simulation
@mastersthesis{Weyl2019,
title = {Developing a generic multi-agent car model to simulate road traffic with MARS},
author = {Julius Weyl},
url = {http://localhost/wp-content/uploads/2021/09/weyl-ma-thesis.pdf},
year = {2019},
date = {2019-06-19},
school = {Hochschule für Angewandte Wissenschaften Hamburg},
abstract = {This thesis describes the development of a generic, agent-based car model for the MARS system. Based on the Intelligent Driver Model a set of agent rules is designed to allow autonomous car agents to drive in two distinct parts of the world. The first scenario is located in Hamburg Altona where the traffic over the course of a day is simulated based on demographic data about the people living there. For the second simulation scenario the model is adapted to the traffic rules of South Africa. The results from the two simulation scenarios are examined to assert whether the model has been build truly generic.},
keywords = {MARS, Multi-Agent Model, Traffic Simulation},
pubstate = {published},
tppubtype = {mastersthesis}
}
This thesis describes the development of a generic, agent-based car model for the MARS system. Based on the Intelligent Driver Model a set of agent rules is designed to allow autonomous car agents to drive in two distinct parts of the world. The first scenario is located in Hamburg Altona where the traffic over the course of a day is simulated based on demographic data about the people living there. For the second simulation scenario the model is adapted to the traffic rules of South Africa. The results from the two simulation scenarios are examined to assert whether the model has been build truly generic.
Köhler-Bußmeier, Alena Störmer Michael
Meta-Analysis of Social Models - Revisiting Cederman’s Emergent Polarity Model Proceeding
University of Hamburg, Department for Informatics and HAW Hamburg, Department for Informatics 2019.
Abstract | Links | BibTeX | Tags: Emergent Polarity Model, MARS, Meta-Analysis, Social Simulation
@proceedings{koehler-stoermer19,
title = {Meta-Analysis of Social Models - Revisiting Cederman’s Emergent Polarity Model},
author = {Alena Störmer Michael Köhler-Bußmeier},
url = {http://edoc.sub.uni-hamburg.de/informatik/volltexte/2019/247/pdf/koehler_stoermer_meta_analysis.pdf},
year = {2019},
date = {2019-05-23},
organization = {University of Hamburg, Department for Informatics and HAW Hamburg, Department for Informatics},
abstract = {In this contribution we analyse the prominent Emergent Polarity Model (EPM) by Eric Cederman from a meta perspective. We vary the model’s “magic” numbers over a wide range of plausible values to obtain concrete model instances of the EPM. Then we studied the sensitivity of the simulation dynamics with respect to variation of these configuration settings. We can cautiously summarise these results as follows: The model’s tendency to decrease the number of states in the long run is quite robust against variation of configurations. But on the other hand one can see that a majority of configurations tends to produce no nation development process at all: The number of states does not decrease significantly. Therefore, we obtain clear evidence that not all configurations lead to nation building while others do. The subsequent research questions that now arises is whether we can characterise those configurations that lead to nation building. And, assuming that we can identify coditions that separate these “effective” configurations from “ineffective” one, we ask wehether these conditions can be interpreted with respect to empirics.},
keywords = {Emergent Polarity Model, MARS, Meta-Analysis, Social Simulation},
pubstate = {published},
tppubtype = {proceedings}
}
In this contribution we analyse the prominent Emergent Polarity Model (EPM) by Eric Cederman from a meta perspective. We vary the model’s “magic” numbers over a wide range of plausible values to obtain concrete model instances of the EPM. Then we studied the sensitivity of the simulation dynamics with respect to variation of these configuration settings. We can cautiously summarise these results as follows: The model’s tendency to decrease the number of states in the long run is quite robust against variation of configurations. But on the other hand one can see that a majority of configurations tends to produce no nation development process at all: The number of states does not decrease significantly. Therefore, we obtain clear evidence that not all configurations lead to nation building while others do. The subsequent research questions that now arises is whether we can characterise those configurations that lead to nation building. And, assuming that we can identify coditions that separate these “effective” configurations from “ineffective” one, we ask wehether these conditions can be interpreted with respect to empirics.
2017
Glake, Daniel; Weyl, Julius; Dohmen, Carolin; Hüning, Christian; Clemen, Thomas
Modeling through Model Transformation with MARS 2.0 Inproceedings
In: Proceedings of the 2017 Spring Simulation Multiconference, Society for Computer Simulation International, Virginia Beach, Virginia, USA, 2017.
Abstract | Links | BibTeX | Tags: MARS
@inproceedings{Glake:2017,
title = {Modeling through Model Transformation with MARS 2.0},
author = {Daniel Glake and Julius Weyl and Carolin Dohmen and Christian Hüning and Thomas Clemen},
url = {http://dl.acm.org/citation.cfm?id=3106078.3106080},
year = {2017},
date = {2017-07-01},
booktitle = {Proceedings of the 2017 Spring Simulation Multiconference},
publisher = {Society for Computer Simulation International},
address = {Virginia Beach, Virginia, USA},
series = {ADS '17},
abstract = {The development of simulation models confronts scientists with the necessity of transforming concepts from theoretical models to executable code. Albeit modern simulation platforms provide APIs to abstract away technology, this task remains complex. Therefore a model-to-code transformation is essential, allowing domain experts to focus on their model instead of implementation details. This paper presents a multi-level transformation concept to facilitate building multi-agent simulations for domain experts. With domain- specific tool support, model ideas can be developed without managing technical requirements. This insures that the modeler is exclusively concerned with the conceptual model by utilizing a MARS (Multi-Agent Research and Simulation) Meta-Model (MMM) and Agent Meta-Model (AMM). We outline the MMM as underlying structure, discuss the foundations of model-driven development and the in-place transformation of the MMM as executed by the MARS modeling workflow. In addition, we present a model-to-code generator that creates the final simulation model.},
keywords = {MARS},
pubstate = {published},
tppubtype = {inproceedings}
}
The development of simulation models confronts scientists with the necessity of transforming concepts from theoretical models to executable code. Albeit modern simulation platforms provide APIs to abstract away technology, this task remains complex. Therefore a model-to-code transformation is essential, allowing domain experts to focus on their model instead of implementation details. This paper presents a multi-level transformation concept to facilitate building multi-agent simulations for domain experts. With domain- specific tool support, model ideas can be developed without managing technical requirements. This insures that the modeler is exclusively concerned with the conceptual model by utilizing a MARS (Multi-Agent Research and Simulation) Meta-Model (MMM) and Agent Meta-Model (AMM). We outline the MMM as underlying structure, discuss the foundations of model-driven development and the in-place transformation of the MMM as executed by the MARS modeling workflow. In addition, we present a model-to-code generator that creates the final simulation model.
Dalski, Jan; Hüning, Christian; Clemen, Thomas
An Output and 3D Visualization Concept for the MSAAS System MARS Inproceedings
In: Proceedings of the 2017 Spring Simulation Multiconference, Society for Computer Simulation International, Virginia Beach, Virginia, USA, 2017.
Abstract | Links | BibTeX | Tags: MARS
@inproceedings{Dalski:2017,
title = {An Output and 3D Visualization Concept for the MSAAS System MARS},
author = {Jan Dalski and Christian Hüning and Thomas Clemen},
url = {http://dl.acm.org/citation.cfm?id=3106078.3106079},
year = {2017},
date = {2017-07-01},
booktitle = {Proceedings of the 2017 Spring Simulation Multiconference},
publisher = {Society for Computer Simulation International},
address = {Virginia Beach, Virginia, USA},
series = {ADS '17},
abstract = {When running complex and large-scale multi agent simulations, the result preparation and presentation is of high importance to make efficient use of the generated data. In addition to conventional visual analytics dashboards, many use-cases could also benefit from 3D visualization approaches -- especially when dealing with spatial-related simulation scenarios. This paper presents a result output and visualization concept for the MARS (Multi-Agent Research and Simulation) simulation platform. The entire process from output selection and generation up to aggregation and 3D presentation is outlined. In order to facilitate a uniform user experience, the visualization is integrated into the existing MARS web suite and runs directly in the web browser. Because of MARS' suitability for large-scale scenarios with high agent counts and terrains with vast extents, many big data challenges have to be faced in this context. As a proof-of-concept, details from the implementation are showcased at the end of this paper.},
keywords = {MARS},
pubstate = {published},
tppubtype = {inproceedings}
}
When running complex and large-scale multi agent simulations, the result preparation and presentation is of high importance to make efficient use of the generated data. In addition to conventional visual analytics dashboards, many use-cases could also benefit from 3D visualization approaches -- especially when dealing with spatial-related simulation scenarios. This paper presents a result output and visualization concept for the MARS (Multi-Agent Research and Simulation) simulation platform. The entire process from output selection and generation up to aggregation and 3D presentation is outlined. In order to facilitate a uniform user experience, the visualization is integrated into the existing MARS web suite and runs directly in the web browser. Because of MARS' suitability for large-scale scenarios with high agent counts and terrains with vast extents, many big data challenges have to be faced in this context. As a proof-of-concept, details from the implementation are showcased at the end of this paper.
Lenfers, Ulfia A; Bruggemann, Rainer; Clemen, Thomas
Exploring survival strategies of African Savanna trees by partial ordering techniques Journal Article
In: Ecological Informatics, vol. 42, pp. 14–23, 2017, ISSN: 15749541.
Abstract | Links | BibTeX | Tags: MARS
@article{Lenfers2017b,
title = {Exploring survival strategies of African Savanna trees by partial ordering techniques},
author = {Ulfia A Lenfers and Rainer Bruggemann and Thomas Clemen},
url = {http://www.sciencedirect.com/science/article/pii/S1574954117301887},
doi = {10.1016/j.ecoinf.2017.08.008},
issn = {15749541},
year = {2017},
date = {2017-01-01},
journal = {Ecological Informatics},
volume = {42},
pages = {14--23},
abstract = {The resilience of savanna ecosystems to climate and land-use changes is an important ecological and management question. The term ‘resilience’ is used to refer to the ability of a tree species to survive in a specific location, even under changing environmental conditions. In this study, vectors of functional traits of selected savanna tree species are studied by applying partial order algorithms to them. Some ecological interpretations are obtained and are compared to published research. One finding is the high rates of nitrogen fixation for the leaves of Acacia nigrescens. In opposition to this well-known fact, we discovered that Sclerocarya birrea has a bigger average leaf area than the other four tree species. Additionally, we found high carbonate values within the leaf from Colophospermum mopane, Combretum apiculatum, and Terminalis sericea. These results correspond to different ecological strategies for the tree species in question. It became obvious that geometric structures gained from partial ordering show a very good correspondence to ecological strategies of these tree species. Concepts of partial order theory may therefore be helpful in ecosystem research.},
keywords = {MARS},
pubstate = {published},
tppubtype = {article}
}
The resilience of savanna ecosystems to climate and land-use changes is an important ecological and management question. The term ‘resilience’ is used to refer to the ability of a tree species to survive in a specific location, even under changing environmental conditions. In this study, vectors of functional traits of selected savanna tree species are studied by applying partial order algorithms to them. Some ecological interpretations are obtained and are compared to published research. One finding is the high rates of nitrogen fixation for the leaves of Acacia nigrescens. In opposition to this well-known fact, we discovered that Sclerocarya birrea has a bigger average leaf area than the other four tree species. Additionally, we found high carbonate values within the leaf from Colophospermum mopane, Combretum apiculatum, and Terminalis sericea. These results correspond to different ecological strategies for the tree species in question. It became obvious that geometric structures gained from partial ordering show a very good correspondence to ecological strategies of these tree species. Concepts of partial order theory may therefore be helpful in ecosystem research.
2016
Hüning, Christian; Adebahr, Mitja; Thiel-Clemen, Thomas; Dalski, Jan; Lenfers, Ulfia A; Grundmann, Lukas; Dybulla, Janus; Kiker, Gregory A
Modeling & Simulation as a Service with the Massive Multi-Agent System MARS Inproceedings
In: Proceedings of the Agent-Directed Simulation Symposium, pp. 8, Proceedings of the 2016 Spring Simulation Multiconference, San Diego, CA, USA, 2016, ISBN: 978-1-5108-2315-0.
Abstract | Links | BibTeX | Tags: MARS
@inproceedings{Hüning2016,
title = {Modeling & Simulation as a Service with the Massive Multi-Agent System MARS},
author = {Christian Hüning and Mitja Adebahr and Thomas Thiel-Clemen and Jan Dalski and Ulfia A Lenfers and Lukas Grundmann and Janus Dybulla and Gregory A Kiker},
url = {http://dl.acm.org/citation.cfm?id=2972193.2972194},
isbn = {978-1-5108-2315-0},
year = {2016},
date = {2016-04-01},
booktitle = {Proceedings of the Agent-Directed Simulation Symposium},
pages = {8},
publisher = {Proceedings of the 2016 Spring Simulation Multiconference},
address = {San Diego, CA, USA},
series = {ADS '16},
abstract = {There is an increasing demand for very large-scale agent-based models. High numbers of individual entities and complex interactions between them require new ways of modeling and simulation. The creation of a distributed simulation model imposes a major challenge in the fields of network communication and coordination to the developer. Integrating multi-scale GIS and time-series data into such a model is another challenge altogether.
We introduce the massive Multi-Agent Research and Simulation system (MARS). It is designed to provide a Modeling and Simulation as a Service (MSaaS) solution to end users. MARS allows domain experts to integrate their data and models through a user-friendly web interface. The complexity of distributed and scalable simulation is handled in the background by a mechanism we call Agent Shadowing. Finally a layer-based segmentation of the model is proposed. It allows domain specialists to focus on one aspect at a time while developing their simulation model.
A large-scale model from the ecological modeling domain is showcased. The model integrates various GIS data formats with collected time-series datasets and simulates a scalable amount of agents. Results from this simulation demonstrate the capabilities of MARS to support the workflow as required by the development of large-scale agent-based simulation models.},
keywords = {MARS},
pubstate = {published},
tppubtype = {inproceedings}
}
There is an increasing demand for very large-scale agent-based models. High numbers of individual entities and complex interactions between them require new ways of modeling and simulation. The creation of a distributed simulation model imposes a major challenge in the fields of network communication and coordination to the developer. Integrating multi-scale GIS and time-series data into such a model is another challenge altogether.
We introduce the massive Multi-Agent Research and Simulation system (MARS). It is designed to provide a Modeling and Simulation as a Service (MSaaS) solution to end users. MARS allows domain experts to integrate their data and models through a user-friendly web interface. The complexity of distributed and scalable simulation is handled in the background by a mechanism we call Agent Shadowing. Finally a layer-based segmentation of the model is proposed. It allows domain specialists to focus on one aspect at a time while developing their simulation model.
A large-scale model from the ecological modeling domain is showcased. The model integrates various GIS data formats with collected time-series datasets and simulates a scalable amount of agents. Results from this simulation demonstrate the capabilities of MARS to support the workflow as required by the development of large-scale agent-based simulation models.
We introduce the massive Multi-Agent Research and Simulation system (MARS). It is designed to provide a Modeling and Simulation as a Service (MSaaS) solution to end users. MARS allows domain experts to integrate their data and models through a user-friendly web interface. The complexity of distributed and scalable simulation is handled in the background by a mechanism we call Agent Shadowing. Finally a layer-based segmentation of the model is proposed. It allows domain specialists to focus on one aspect at a time while developing their simulation model.
A large-scale model from the ecological modeling domain is showcased. The model integrates various GIS data formats with collected time-series datasets and simulates a scalable amount of agents. Results from this simulation demonstrate the capabilities of MARS to support the workflow as required by the development of large-scale agent-based simulation models.
Lenfers, Ulfia A; Brüggemann, R; Thiel-Clemen, Thomas
2016.
@conference{Lenfers2016b,
title = {Von der Komplexität der Wirklichkeit hin zum Modell: Einsatz partieller Ordnungen bei der Modellentwicklung},
author = {Ulfia A Lenfers and R Brüggemann and Thomas Thiel-Clemen},
editor = {Jochen Wittmann and Thomas Thiel-Clemen and Ulfia A Lenfers},
url = {https://www.researchgate.net/publication/304242843_Von_der_Komplexitat_der_Wirklichkeit_hin_zum_Modell_Einsatz_partieller_Ordnungen_bei_der_Modellentwicklung},
year = {2016},
date = {2016-04-01},
keywords = {MARS},
pubstate = {published},
tppubtype = {conference}
}
Wagner, Thomas; Moldt, Daniel; Köhler-Bußmeier, Michael
From Hornets to Hybrid Agent and Workflow Systems Conference
International Workshop on Petri Nets and Software Engineering 2016, no. 1591, 2016.
@conference{Wagner2016b,
title = {From Hornets to Hybrid Agent and Workflow Systems},
author = {Thomas Wagner and Daniel Moldt and Michael Köhler-Bußmeier},
editor = {Lawrence Cabac and Lars Kristensen and Heiko Rölke},
url = {http://ceur-ws.org/Vol-1591/paper20.pdf},
year = {2016},
date = {2016-04-01},
booktitle = {International Workshop on Petri Nets and Software Engineering 2016},
number = {1591},
pages = {301-321},
keywords = {MARS},
pubstate = {published},
tppubtype = {conference}
}
2015
Thiel-Clemen, Thomas Lenfers Ulfia;
Arbeiten in großen Forschungsteams – Helfen Multi-Agenten Modelle Inproceedings
In: Wittmann, Jochen; Wieland, Ralf (Ed.): Wittmann, Jochen; Wieland, Ralf (Ed.): Simulation in Umwelt- und Geowissenschaften, Workshop Müncheberg, pp. 205-212, 2015.
@inproceedings{Lenfers2015,
title = {Arbeiten in großen Forschungsteams – Helfen Multi-Agenten Modelle},
author = {Thomas Lenfers Ulfia; Thiel-Clemen},
editor = {Jochen Wittmann and Ralf Wieland},
year = {2015},
date = {2015-01-01},
booktitle = {Wittmann, Jochen; Wieland, Ralf (Ed.): Simulation in Umwelt- und Geowissenschaften, Workshop Müncheberg},
pages = {205-212},
keywords = {MARS},
pubstate = {published},
tppubtype = {inproceedings}
}
Lenfers, Ulfia; Hüning Christian; Schnoor Alexander; Kiker Greg Thiel-Clemen Thomas;
A Benefit for KNP-Ecologists – Massive Multi-Agent Simulation with MARS Journal Article
In: Poster at Savanna Science Network Meeting, Kruger NP, South Africa, 2015.
@article{Thiel-Clemen2015,
title = {A Benefit for KNP-Ecologists – Massive Multi-Agent Simulation with MARS},
author = {Ulfia; Hüning Christian; Schnoor Alexander; Kiker Greg Thiel-Clemen Thomas; Lenfers},
year = {2015},
date = {2015-01-01},
journal = {Poster at Savanna Science Network Meeting, Kruger NP, South Africa},
keywords = {MARS},
pubstate = {published},
tppubtype = {article}
}
2014
Steiman, Daniel
Context-Awareness in Multiagentensimulationen auf Basis von Complex Event Processing Incollection
In: Big Data - Komplexität meistern, vol. 1. Aufl, 2014.
Abstract | Links | BibTeX | Tags: MARS
@incollection{Steiman:2014,
title = {Context-Awareness in Multiagentensimulationen auf Basis von Complex Event Processing},
author = {Daniel Steiman},
url = {/wp-content/uploads/papers/Context-Awareness in Multiagentensimulationen auf Basis von Complex Event Processing.pdf},
year = {2014},
date = {2014-09-25},
booktitle = {Big Data - Komplexität meistern},
volume = {1. Aufl},
abstract = {Kontextbewusste Systeme bieten die Möglichkeit, dass Anwendungen ihr Verhalten ohne die aktive Einflussnahme von Anwendern selbstständig an vorherrschende Situationen anpassen. Dazu erfassen sie Kontextdaten, die verarbeitet und zur Steuerung der Anwendung verwendet werden. Aus diesem Grund wurden bereits Toolkits, Frameworks und Ansätze entwickelt, die eine einfache Entwicklung von kontextbewussten Anwendungen ermöglichen sollen. Die bisher auf dem Gebiet der Context-Awareness vorgestellten Arbeiten weisen jedoch Nachteile auf, die einen Einsatz in bestimmten Anwendungsbereichen stark einschränken oder sogar völlig ausschließen. Dazu zählen vor allem Anwendungsbereiche, die den Anspruch haben riesige Mengen von Ereignissen und damit riesige Volumen an Kontextdaten in Echtzeit verarbeiten zu können. Dieses Paper zeigt die Nachteile bestehender Ansätze auf und befasst sich mit der Entwicklung eines Konzepts, mit dem ein breites Spektrum von Anwendungen möglichst einfach kontextbewusst gemacht werden kann. Um die Einsatzfähigkeit und die Performance des entwickelten Konzepts zu untersuchen, wird es in einem prototypischen Fallbeispiel einer Multiagentensimulation verwendet.},
keywords = {MARS},
pubstate = {published},
tppubtype = {incollection}
}
Kontextbewusste Systeme bieten die Möglichkeit, dass Anwendungen ihr Verhalten ohne die aktive Einflussnahme von Anwendern selbstständig an vorherrschende Situationen anpassen. Dazu erfassen sie Kontextdaten, die verarbeitet und zur Steuerung der Anwendung verwendet werden. Aus diesem Grund wurden bereits Toolkits, Frameworks und Ansätze entwickelt, die eine einfache Entwicklung von kontextbewussten Anwendungen ermöglichen sollen. Die bisher auf dem Gebiet der Context-Awareness vorgestellten Arbeiten weisen jedoch Nachteile auf, die einen Einsatz in bestimmten Anwendungsbereichen stark einschränken oder sogar völlig ausschließen. Dazu zählen vor allem Anwendungsbereiche, die den Anspruch haben riesige Mengen von Ereignissen und damit riesige Volumen an Kontextdaten in Echtzeit verarbeiten zu können. Dieses Paper zeigt die Nachteile bestehender Ansätze auf und befasst sich mit der Entwicklung eines Konzepts, mit dem ein breites Spektrum von Anwendungen möglichst einfach kontextbewusst gemacht werden kann. Um die Einsatzfähigkeit und die Performance des entwickelten Konzepts zu untersuchen, wird es in einem prototypischen Fallbeispiel einer Multiagentensimulation verwendet.
Baldowski, Mariusz; Busch, Jan; Pereki, Hodabalo; Thiel-Clemen, Thomas
Ermittlung der Waldbiomasse mit Hilfe eines spatial gemischten Indikators für den Abdoulaye Forest, Togo Inproceedings
In: Maretis, Dimitris Wittmann Jochen; K (Ed.): Simulation in Umwelt- und Geowissenschaften, pp. 37-49, GI Shaker, 2014, ISBN: 9783844030327.
Abstract | Links | BibTeX | Tags: MARS
@inproceedings{Baldowski2014,
title = {Ermittlung der Waldbiomasse mit Hilfe eines spatial gemischten Indikators für den Abdoulaye Forest, Togo},
author = {Mariusz Baldowski and Jan Busch and Hodabalo Pereki and Thomas Thiel-Clemen},
editor = {Dimitris Wittmann Jochen; K Maretis},
url = {/wp-content/uploads/papers/Ermittlung der Waldbiomasse mit Hilfe eines spatial gemischten Indikators für den Abdoulaye Forest.pdf},
isbn = {9783844030327},
year = {2014},
date = {2014-04-27},
booktitle = {Simulation in Umwelt- und Geowissenschaften},
volume = {1. Aufl.},
pages = {37-49},
publisher = {Shaker},
organization = {GI},
series = {Berichte aus der Umweltinformatik},
abstract = {Entwicklungsländer sind die anfälligsten Gebiete für den Klimawandel und klimabedingte Extremereignisse. Um klimatische Veränderungen wie Temperatur, Niederschlag und der damit verbundenen Wasserarmut sowie verstärkten Hochwasserereignissen zu identifizieren, können spatial gemischte Indikatoren zur Erstellung von sogenannten Hotspots herangezogen werden. Diese Gefahrenquellen liefern aktuelle Informationen für gezielte Maßnahmen gegen den Klimawandel. Dabei werden anhand von Segmentierung und Klassifizierung Subindikatoren ermittelt, welche zur Berechnung der Indikatoren benötigt werden, um eine Aussage über ein bestimmtes Gebiet zu treffen. Heterogen skalierte Geodaten erschweren jedoch die Erstellung von spatial gemischten Indikatoren, welche eine homogene Georeferenzierung erfordern. Insbesondere die Verschneidung von punktuell / temporal und spatial heterogenen Daten bleibt unberücksichtigt. Geoinformationssysteme bieten Funktionalitäten zur Segmentierung und Klassifizierung an. Seit kurzem treten Datawarehouses im Bereich der Ökologie als Lösung für die Probleme der entstandenen, heterogen skalierten Daten in den Vordergrund. Anhand eines Use Case in einem Krisengebiet werden Anforderungen gesammelt, um ein System zu erstellen, welches die Integration und Verschneidung der spatio-temporalen Daten über ein Wechselspiel zwischen einem Geoinformationssystem und einem Datawarehouse zur Berechnung von spatial gemischten Indikatoren ermöglicht. Wir stellen dieses System vor und beschreiben den aktuellen Stand der Forschung.},
keywords = {MARS},
pubstate = {published},
tppubtype = {inproceedings}
}
Entwicklungsländer sind die anfälligsten Gebiete für den Klimawandel und klimabedingte Extremereignisse. Um klimatische Veränderungen wie Temperatur, Niederschlag und der damit verbundenen Wasserarmut sowie verstärkten Hochwasserereignissen zu identifizieren, können spatial gemischte Indikatoren zur Erstellung von sogenannten Hotspots herangezogen werden. Diese Gefahrenquellen liefern aktuelle Informationen für gezielte Maßnahmen gegen den Klimawandel. Dabei werden anhand von Segmentierung und Klassifizierung Subindikatoren ermittelt, welche zur Berechnung der Indikatoren benötigt werden, um eine Aussage über ein bestimmtes Gebiet zu treffen. Heterogen skalierte Geodaten erschweren jedoch die Erstellung von spatial gemischten Indikatoren, welche eine homogene Georeferenzierung erfordern. Insbesondere die Verschneidung von punktuell / temporal und spatial heterogenen Daten bleibt unberücksichtigt. Geoinformationssysteme bieten Funktionalitäten zur Segmentierung und Klassifizierung an. Seit kurzem treten Datawarehouses im Bereich der Ökologie als Lösung für die Probleme der entstandenen, heterogen skalierten Daten in den Vordergrund. Anhand eines Use Case in einem Krisengebiet werden Anforderungen gesammelt, um ein System zu erstellen, welches die Integration und Verschneidung der spatio-temporalen Daten über ein Wechselspiel zwischen einem Geoinformationssystem und einem Datawarehouse zur Berechnung von spatial gemischten Indikatoren ermöglicht. Wir stellen dieses System vor und beschreiben den aktuellen Stand der Forschung.
Köhler-Bußmeier, Michael
A Survey on Decidability Results for Elementary Object Systems Journal Article
In: Fundamenta Informaticae, vol. 130, no. 1, pp. 99-123, 2014.
@article{Koehler-Bußmeier2014,
title = {A Survey on Decidability Results for Elementary Object Systems},
author = {Michael Köhler-Bußmeier},
year = {2014},
date = {2014-01-01},
journal = {Fundamenta Informaticae},
volume = {130},
number = {1},
pages = {99-123},
keywords = {MARS},
pubstate = {published},
tppubtype = {article}
}
2013
Köhler-Bußmeier, Michael
Defining Multi-Party Compromises using Unfoldings of Workflow Nets Journal Article
In: Fundamenta Informaticae, vol. 128, no. 1-2, pp. 97-111, 2013.
@article{Koehler-Bußmeier2013b,
title = {Defining Multi-Party Compromises using Unfoldings of Workflow Nets},
author = {Michael Köhler-Bußmeier},
year = {2013},
date = {2013-01-01},
journal = {Fundamenta Informaticae},
volume = {128},
number = {1-2},
pages = {97-111},
keywords = {MARS},
pubstate = {published},
tppubtype = {article}
}
2012
Münchow, Stefan; Enukidze, Ia; Sarstedt, Stefan; Thiel-Clemen, Thomas
WALK: A Modular Testbed for Crowd Evacuation Simulation Inproceedings
In: Weidman, Ulrich; Kirsch, Uwe; Schreckenberg, Michael (Ed.): Pedestrian and Evacuation Dynamics 2012, pp. 1417-1424, Springer, 2012.
@inproceedings{Münchow2012,
title = {WALK: A Modular Testbed for Crowd Evacuation Simulation},
author = {Stefan Münchow and Ia Enukidze and Stefan Sarstedt and Thomas Thiel-Clemen},
editor = {Ulrich Weidman and Uwe Kirsch and Michael Schreckenberg},
year = {2012},
date = {2012-01-01},
booktitle = {Pedestrian and Evacuation Dynamics 2012},
volume = {2},
pages = {1417-1424},
publisher = {Springer},
keywords = {MARS},
pubstate = {published},
tppubtype = {inproceedings}
}
2010
Schmittendorf, Eckhard; Schultheiß, Birgit; Thiel-Clemen, Thomas
Analysis of Nocturnal Pulse Oximetry Signals Using the Continous Wavelet Transform Inproceedings
In: Bauernschmitt, R; Persson, P; Wessel, N (Ed.): Proceedings of the 6th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO), 2010.
@inproceedings{Schmittendorf2010,
title = {Analysis of Nocturnal Pulse Oximetry Signals Using the Continous Wavelet Transform},
author = {Eckhard Schmittendorf and Birgit Schultheiß and Thomas Thiel-Clemen},
editor = {R Bauernschmitt and P Persson and N Wessel},
year = {2010},
date = {2010-04-14},
booktitle = {Proceedings of the 6th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)},
keywords = {MARS},
pubstate = {published},
tppubtype = {inproceedings}
}
Köhler-Bußmeier, Michael; Deliu, Endri
SONAR/OREDI: A Tool for Creation and Deployment of Organisation Models Inproceedings
In: Dix, Jürgen; Cees, Witteveen (Ed.): Conference on Multi-Agent System Technologies, MATES 2010, pp. 76-87, 2010.
@inproceedings{koehler+10-mates,
title = {SONAR/OREDI: A Tool for Creation and Deployment of Organisation Models},
author = {Michael Köhler-Bußmeier and Endri Deliu},
editor = {Jürgen Dix and Witteveen Cees},
year = {2010},
date = {2010-01-01},
booktitle = {Conference on Multi-Agent System Technologies, MATES 2010},
volume = {6251},
pages = {76-87},
series = {LNAI},
keywords = {MARS},
pubstate = {published},
tppubtype = {inproceedings}
}
Moldt, Daniel; Köhler-Bußmeier, Michael; Theilmann, Axel; Adameit, Simon; Betz, Tobias; Cabac, Lawrence; Hars, Florian; Hewelt, Marcin; Popov, Dimitri; Quenum, José; Wagner, Thomas; Warns, Timo; Wüstenberg, Lars
Modelling Distributed Network Security in a Petri Net and Agent-based Approach Inproceedings
In: Dix, Jürgen; Cees, Witteveen (Ed.): Conference on Multi-Agent System Technologies, MATES 2010, 2010.
@inproceedings{koehler+10-mates-herold,
title = {Modelling Distributed Network Security in a Petri Net and Agent-based Approach},
author = {Daniel Moldt and Michael Köhler-Bußmeier and Axel Theilmann and Simon Adameit and Tobias Betz and Lawrence Cabac and Florian Hars and Marcin Hewelt and Dimitri Popov and José Quenum and Thomas Wagner and Timo Warns and Lars Wüstenberg},
editor = {Jürgen Dix and Witteveen Cees},
year = {2010},
date = {2010-01-01},
booktitle = {Conference on Multi-Agent System Technologies, MATES 2010},
volume = {6251},
series = {LNAI},
keywords = {MARS},
pubstate = {published},
tppubtype = {inproceedings}
}
Köhler-Bußmeier, Michael; Wester-Ebbinghaus, Matthias; Moldt, Daniel
Generating Executable MAS-Prototypes from SONAR Specifications Inproceedings
In: Vos, Marina De; Fornara, Nicoletta; Pitt, Jeremy V; Vouros, George A (Ed.): Workshop on Coordination, Organizations, Institutions, and Norms in Agent Systems, COIN'10, pp. 21–38, 2010.
@inproceedings{koehler-wester10-coin,
title = {Generating Executable MAS-Prototypes from SONAR Specifications},
author = {Michael Köhler-Bußmeier and Matthias Wester-Ebbinghaus and Daniel Moldt},
editor = {Marina De Vos and Nicoletta Fornara and Jeremy V Pitt and George A Vouros},
year = {2010},
date = {2010-01-01},
booktitle = {Workshop on Coordination, Organizations,
Institutions, and Norms in Agent Systems, COIN'10},
volume = {6541},
pages = {21--38},
series = {LNAI},
keywords = {MARS},
pubstate = {published},
tppubtype = {inproceedings}
}
Wester-Ebbinghaus, Matthias; Moldt, Daniel; Köhler-Bußmeier, Michael
Modelling an open and controlled system unit as a modular component of systems of systems Journal Article
In: Transactions on Petri Nets and Other Models of Concurrency, vol. 6550, pp. 174–198, 2010.
@article{Wester+10-topnoc,
title = {Modelling an open and controlled system unit as a modular component of systems of systems},
author = {Matthias Wester-Ebbinghaus and Daniel Moldt and Michael Köhler-Bußmeier},
year = {2010},
date = {2010-01-01},
journal = {Transactions on Petri Nets and Other Models of Concurrency},
volume = {6550},
pages = {174--198},
series = {LNCS},
keywords = {MARS},
pubstate = {published},
tppubtype = {article}
}
2009
Köhler-Bußmeier, Michael
University of Hamburg, 2009.
@phdthesis{koehler-habil,
title = {Koordinierte Selbstorganisation und selbstorganisierte Koordination: Eine formale Spezifikation reflexiver Selbstorganisation in Multiagentensystemen unter spezieller Berücksichtigung der sozialwissenschaftlichen Perspektive},
author = {Michael Köhler-Bußmeier},
url = {http://epub.sub.uni-hamburg.de/informatik/volltexte/2010/144/},
year = {2009},
date = {2009-01-01},
school = {University of Hamburg},
keywords = {MARS},
pubstate = {published},
tppubtype = {phdthesis}
}
Köhler-Bußmeier, Michael
Koordinierung in Agentensystemen Incollection
In: Selbstorganisation und Governance in künstlichen und sozialen Systemen, 2009.
@incollection{koehler09-dispo-mas,
title = {Koordinierung in Agentensystemen},
author = {Michael Köhler-Bußmeier},
year = {2009},
date = {2009-01-01},
booktitle = {Selbstorganisation und Governance in künstlichen und sozialen Systemen},
chapter = {3},
crossref = {dispobuch},
keywords = {MARS},
pubstate = {published},
tppubtype = {incollection}
}
Langer, Roman; Köhler-Bußmeier, Michael
Der Konstitutionsmechanismus sozialer Systeme Incollection
In: Selbstorganisation und Governance in künstlichen und sozialen Systemen, 2009.
@incollection{koehler09-dispo-tssob,
title = {Der Konstitutionsmechanismus sozialer Systeme},
author = {Roman Langer and Michael Köhler-Bußmeier},
year = {2009},
date = {2009-01-01},
booktitle = {Selbstorganisation und Governance in künstlichen und sozialen Systemen},
chapter = {6},
crossref = {dispobuch},
keywords = {MARS},
pubstate = {published},
tppubtype = {incollection}
}
Köhler-Bußmeier, Michael
Ein Rahmenmodell reflexiv selbstorganisierender Systeme Incollection
In: Selbstorganisation und Governance in künstlichen und sozialen Systemen, 2009.
@incollection{koehler09-dispo-resos,
title = {Ein Rahmenmodell reflexiv selbstorganisierender Systeme},
author = {Michael Köhler-Bußmeier},
year = {2009},
date = {2009-01-01},
booktitle = {Selbstorganisation und Governance in künstlichen und sozialen Systemen},
chapter = {7},
crossref = {dispobuch},
keywords = {MARS},
pubstate = {published},
tppubtype = {incollection}
}
Köhler-Bußmeier, Michael
SONAR: Eine sozialtheoretisch fundierte Multiagentensystemarchitektur Incollection
In: Selbstorganisation und Governance in künstlichen und sozialen Systemen, 2009.
@incollection{koehler09-dispo-sonar,
title = {SONAR: Eine sozialtheoretisch fundierte Multiagentensystemarchitektur},
author = {Michael Köhler-Bußmeier},
year = {2009},
date = {2009-01-01},
booktitle = {Selbstorganisation und Governance in künstlichen und sozialen Systemen},
chapter = {8--12},
crossref = {dispobuch},
keywords = {MARS},
pubstate = {published},
tppubtype = {incollection}
}
Köhler-Bußmeier, Michael; Wester-Ebbinghaus, Matthias; Moldt, Daniel
A Formal Model for Organisational Structures behind Process-Aware Information Systems Journal Article
In: Transactions on Petri Nets and Other Models of Concurrency. Special Issue on Concurrency in Process-Aware Information Systems, vol. 5460, pp. 98-114, 2009.
@article{koehler+2009-topnoc,
title = {A Formal Model for Organisational Structures behind Process-Aware Information Systems},
author = {Michael Köhler-Bußmeier and Matthias Wester-Ebbinghaus and Daniel Moldt},
editor = {Wil M P van der Aalst},
year = {2009},
date = {2009-01-01},
journal = {Transactions on Petri Nets and Other Models of Concurrency. Special Issue on Concurrency in Process-Aware Information Systems},
volume = {5460},
pages = {98-114},
series = {LNCS},
keywords = {MARS},
pubstate = {published},
tppubtype = {article}
}
Köhler-Bußmeier, Michael; Wester-Ebbinghaus, Matthias
SONAR: A Multi-Agent Infrastructure for Active Application Architectures and Inter-Organisational Information Systems Inproceedings
In: Braubach, Lars; van der Hoek, Wiebke; Petta, Paolo; Pokahr, Alexander (Ed.): Conference on Multi-Agent System Technologies, MATES 2009, pp. 248–257, 2009.
@inproceedings{koehler+09-mates,
title = {SONAR: A Multi-Agent Infrastructure for Active Application Architectures and Inter-Organisational Information Systems},
author = {Michael Köhler-Bußmeier and Matthias Wester-Ebbinghaus},
editor = {Lars Braubach and Wiebke van der Hoek and Paolo Petta and Alexander Pokahr},
year = {2009},
date = {2009-01-01},
booktitle = {Conference on Multi-Agent System Technologies, MATES 2009},
volume = {5774},
pages = {248--257},
series = {LNAI},
keywords = {MARS},
pubstate = {published},
tppubtype = {inproceedings}
}
2008
Köhler-Bußmeier, Michael; Wester-Ebbinghaus, Matthias
Automatic Generation of Distributed Team Formation Algorithms from Organizational Models Inproceedings
In: Hübner, Jomi; Boissier, Olivier (Ed.): Workshop on Coordination, Organizations, Institutions, and Norms in Agent Systems, COIN'08, 2008.
@inproceedings{koehler-wester08-coin,
title = {Automatic Generation of Distributed Team Formation Algorithms from Organizational Models},
author = {Michael Köhler-Bußmeier and Matthias Wester-Ebbinghaus},
editor = {Jomi Hübner and Olivier Boissier},
year = {2008},
date = {2008-01-01},
booktitle = {Workshop on Coordination, Organizations, Institutions, and Norms in Agent Systems, COIN'08},
keywords = {MARS},
pubstate = {published},
tppubtype = {inproceedings}
}
Köhler-Bußmeier, Michael; Wester-Ebbinghaus, Matthias; Moldt, Daniel
From Multi-Agent to Multi-Organization Systems: Utilizing Middleware Approaches Inproceedings
In: Artikis, Alexander; Picard, Gauthier; Vercouter, Laurent (Ed.): International Workshop Engineering Societies in the Agents World (ESAW'08), pp. 46-65, 2008.
@inproceedings{wester+08esaw,
title = {From Multi-Agent to Multi-Organization Systems: Utilizing Middleware Approaches},
author = {Michael Köhler-Bußmeier and Matthias Wester-Ebbinghaus and Daniel Moldt},
editor = {Alexander Artikis and Gauthier Picard and Laurent Vercouter},
year = {2008},
date = {2008-01-01},
booktitle = {International Workshop Engineering Societies in the Agents World (ESAW'08)},
volume = {5485},
pages = {46-65},
keywords = {MARS},
pubstate = {published},
tppubtype = {inproceedings}
}
2007
Köhler, Michael; Langer, Roman; v. Lüde, Rolf; Moldt, Daniel; Rölke, Heiko; Valk, Rüdiger
Socionic Multi-Agent Systems based on Reflexive Petri Nets and Theories of Social Self-Organisation Journal Article
In: Journal of artificial societies and social simulation, vol. 10, no. 1, 2007.
@article{dispo07,
title = {Socionic Multi-Agent Systems based on Reflexive Petri Nets and Theories of Social Self-Organisation},
author = {Michael Köhler and Roman Langer and Rolf v. Lüde and Daniel Moldt and Heiko Rölke and Rüdiger Valk},
url = {http://jasss.soc.surrey.ac.uk/10/1/3.html},
year = {2007},
date = {2007-01-01},
journal = {Journal of artificial societies and social simulation},
volume = {10},
number = {1},
keywords = {MARS},
pubstate = {published},
tppubtype = {article}
}
Köhler, Michael; Rölke, Heiko
Web Service Orchestration with Super-Dual Object Nets Inproceedings
In: Kleijn, J; Yakovlev, A (Ed.): International Conference on Application and Theory of Petri Nets 2007, pp. 263-280, Springer, 2007.
@inproceedings{Koehler+07dual,
title = {Web Service Orchestration with Super-Dual Object Nets},
author = {Michael Köhler and Heiko Rölke},
editor = {J Kleijn and A Yakovlev},
year = {2007},
date = {2007-01-01},
booktitle = {International Conference on Application and Theory of Petri Nets 2007},
volume = {4546},
pages = {263-280},
publisher = {Springer},
keywords = {MARS},
pubstate = {published},
tppubtype = {inproceedings}
}
Köhler, Michael
A Formal Model of Multi-Agent Organisations Journal Article
In: Fundamenta Informaticae, vol. 79, no. 3-4, pp. 415 - 430, 2007.
@article{koehler07-fi-org,
title = {A Formal Model of Multi-Agent Organisations},
author = {Michael Köhler},
year = {2007},
date = {2007-01-01},
journal = {Fundamenta Informaticae},
volume = {79},
number = {3-4},
pages = {415 - 430},
keywords = {MARS},
pubstate = {published},
tppubtype = {article}
}
Köhler, Michael; Wester-Ebbinghaus, Matthias
Organizational Models and Multi-Agent System Deployment Inproceedings
In: Multi-Agent Systems and Applications (5), pp. 307-309, Springer, 2007.
@inproceedings{koehler+07cemas,
title = {Organizational Models and Multi-Agent System Deployment},
author = {Michael Köhler and Matthias Wester-Ebbinghaus},
year = {2007},
date = {2007-01-01},
booktitle = {Multi-Agent Systems and Applications (5)},
volume = {4696},
pages = {307-309},
publisher = {Springer},
series = {LNAI},
keywords = {MARS},
pubstate = {published},
tppubtype = {inproceedings}
}
2006
Köhler, Michael; Valk, Rüdiger
Theoriebewertung und Modellerstellung: Ein Erfahrungsbericht Incollection
In: Valk, R (Ed.): Ordnungsbildung und Erkenntnisprozesse, pp. 63-75, Hamburg University Press, 2006.
@incollection{koehler+06order,
title = {Theoriebewertung und Modellerstellung: Ein Erfahrungsbericht},
author = {Michael Köhler and Rüdiger Valk},
editor = {R Valk},
year = {2006},
date = {2006-01-01},
booktitle = {Ordnungsbildung und Erkenntnisprozesse},
pages = {63-75},
publisher = {Hamburg University Press},
keywords = {MARS},
pubstate = {published},
tppubtype = {incollection}
}
Köhler, Michael; Moldt, Daniel; Ortmann, Jan
Dynamic Service Composition: A Petri-Net Based Approach Inproceedings
In: Manolopoulos, Y; Filipe, J; Constantopoulos, P; Cordeiro, J (Ed.): Conference on Enterprise Information Systems: Databases and Information Systems Integration (ICEIS 2006), pp. 159-165, 2006.
@inproceedings{koehler06-iceis,
title = {Dynamic Service Composition: A Petri-Net Based Approach},
author = {Michael Köhler and Daniel Moldt and Jan Ortmann},
editor = {Y Manolopoulos and J Filipe and P Constantopoulos and J Cordeiro},
year = {2006},
date = {2006-01-01},
booktitle = {Conference on Enterprise Information Systems: Databases and Information
Systems Integration (ICEIS 2006)},
pages = {159-165},
keywords = {MARS},
pubstate = {published},
tppubtype = {inproceedings}
}
2005
Köhler, Michael; Moldt, Daniel; Rölke, Heiko; Valk, Rüdiger
Linking Micro and Macro Description of Scalable Social Systems using Reference Nets Inproceedings
In: Fischer, Klaus; Florian, Michael; Malsch, Thomas (Ed.): Socionics: Sociability of Complex Social Systems, pp. 51–67, 2005.
@inproceedings{asko-skalierung,
title = {Linking Micro and Macro Description of Scalable Social Systems using Reference Nets},
author = {Michael Köhler and Daniel Moldt and Heiko Rölke and Rüdiger Valk},
editor = {Klaus Fischer and Michael Florian and Thomas Malsch},
year = {2005},
date = {2005-01-01},
booktitle = {Socionics: Sociability of Complex Social Systems},
volume = {3413},
pages = {51--67},
crossref = {socionics-scalability},
keywords = {MARS},
pubstate = {published},
tppubtype = {inproceedings}
}
2003
von Lüde, Rolf; Moldt, Daniel; Valk, Rüdiger; Köhler, Michael; Langer, Roman; Rölke, Heiko; Spresny, Daniela
Sozionik: Modellierung soziologischer Theorie Book
Lit-Verlag, 2003.
@book{asko-buch,
title = {Sozionik: Modellierung soziologischer Theorie},
author = {Rolf von Lüde and Daniel Moldt and Rüdiger Valk and Michael Köhler and Roman Langer and Heiko Rölke and Daniela Spresny},
url = {http://www.lit-verlag.de/isbn/3-8258-5980-0},
year = {2003},
date = {2003-01-01},
publisher = {Lit-Verlag},
series = {Wirtschaft -- Arbeit -- Technik},
keywords = {MARS},
pubstate = {published},
tppubtype = {book}
}
1998
Clemen, Thomas
The use of scale information for integrating simulation models into environmental information systems Journal Article
In: Ecological Modelling, vol. 108, pp. 107–113, 1998.
BibTeX | Tags: HAW, MARS, wavelets
@article{Clemen:1998,
title = {The use of scale information for integrating simulation models into environmental information systems},
author = {Thomas Clemen},
year = {1998},
date = {1998-01-01},
journal = {Ecological Modelling},
volume = {108},
pages = {107--113},
keywords = {HAW, MARS, wavelets},
pubstate = {published},
tppubtype = {article}
}