@article {1513, title = {Dynamic trade-offs in granulocyte colony-stimulating factor (G-CSF) administration during chemotherapy}, journal = {System Dynamics Review}, volume = {36}, year = {2021}, pages = {397{\textendash}446}, abstract = {

Chemotherapeutic treatment of cancer comes with side effects on the immune system, such as Chemotherapy-Induced Neutropenia (CIN). A recombinant form of Granulocyte Colony-Stimulating Factor (G-CSF) has been used to alleviate CIN. This is a challenging task due to the feedback complexity of the hematological system. A System Dynamics model is constructed to study this system and to derive practical insights for the management of CIN. Stimulation of neutrophil production via G-CSF is observed to propose crucial trade-offs. On one hand, production by stem cells and mobilization from bone marrow should be stimulated to compensate for the impairment caused by chemotherapy. On the other hand, it is important to avoid overstimulation, which reduces the regenerative capacity, as well as draining the much-needed bone-marrow reservoir. Our analysis supports the intuition that the response to G-CSF administration is conditional to patient characteristics, and {\textquotedblleft}one for all{\textquotedblright} treatment protocols are impractical. {\textcopyright} 2021 System Dynamics Society.

}, issn = {10991727}, doi = {10.1002/sdr.1671}, author = {{\.I}rsoy, Orkun and G{\"u}z, {\c S}anser and Akan, Naz Beril and G{\"o}nen{\c c} Y{\"u}cel} } @article {1535, title = {Learning prototypes for multiple instance learning.}, journal = {Turkish Journal of Electrical Engineering \& Computer Sciences}, volume = {29}, year = {2021}, author = {{\"O}zg{\"u}r Emre Sivrikaya and Mert Y{\"u}kselg{\"o}n{\"u}l and Mustafa Gokce Baydogan} } @article {1417, title = {Analysis of an individual-based influenza epidemic model using random forest metamodels and adaptive sequential sampling}, journal = {Systems Research and Behavioral Science}, volume = {37}, year = {2020}, pages = {936-958}, abstract = {

Abstract This study proposes a three-step procedure for the analysis of input{\textendash}response relationships of dynamic models, which enables the analyst to develop a better understanding about the dynamics of the system. The main building block of the procedure is a random forest metamodel capturing the input{\textendash}output relationships. We utilize an active learning approach as the second step to improve the accuracy of the metamodel. In the last step, we develop a novel way to present the information captured by the metamodel as a set of intelligible IF{\textendash}THEN rules. For illustration, we use the FluTE model, which is an individual-based influenza epidemic model. We observe that the number of daily applicable vaccines determines the success of an intervention strategy the most. Another critical observation is that when the daily available vaccines are constrained, nonpharmaceutical strategies should be incorporated to reduce the extent of the outbreak.

}, keywords = {adaptive sequential sampling, FluTE, individual-based modelling, Metamodeling, Rule Extraction}, doi = {https://doi.org/10.1002/sres.2763}, url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/sres.2763}, author = {Edali, Mert and G{\"o}nen{\c c} Y{\"u}cel} } @article {1449, title = {Modeling the pharmacodynamics of nandrolone doping drug and implications for anti-doping testing}, journal = {System Dynamics Review}, volume = {36}, year = {2020}, pages = {467-496}, abstract = {

Abstract We model the pathways of nandrolone in the body, an anabolic steroid widely used as a performance enhancing drug (PED). The model generates the dynamics of nandrolone and its metabolites. PED tests check for the presence of a primary metabolite of nandrolone, 19-NA in urine. To cheat in these tests, PED users typically use inhibitors that reduce the urinary concentration of 19-NA. One such inhibitor is finasteride. Finasteride{\textquoteright}s main effect in the body is the inhibition of reductase enzymes that turn nandrolone into its metabolite 19-NA. To capture this effect, we include structures for finasteride and reductase enzymes in the model. The model is tested by fundamental structure validity tests. We also show that the model behavior is consistent with experimental data in the literature. We finally investigate the potential ways by which the drug users may cheat in PED tests and make suggestions for improved testing as counter-measures. {\textcopyright} 2021 System Dynamics Society

}, doi = {https://doi.org/10.1002/sdr.1672}, url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/sdr.1672}, author = {Sahin, {\"O}zge and Feyyaz {\c S}ent{\"u}rk and Yaman Barlas and Yasarcan, Hakan} } @article {1415, title = {Classification of generic system dynamics model outputs via supervised time series pattern discovery}, journal = {Turkish Journal of Electrical Engineering \& Computer Sciences}, volume = {27}, year = {2019}, pages = {832{\textendash}846}, author = {Edali, Mert and Mustafa Gokce Baydogan and G{\"o}nen{\c c} Y{\"u}cel} } @article {1416, title = {Exploring the behavior space of agent-based simulation models using random forest metamodels and sequential sampling}, journal = {Simulation Modelling Practice and Theory}, volume = {92}, year = {2019}, pages = {62-81}, abstract = {

Agent-based modeling is an effective way of understanding and analyzing complex adaptive phenomena. In this respect, discovering the relationship between inputs and outputs of agent-based models is the ultimate way of providing insights into understanding the dynamics of the system being modeled. Therefore, there are many approaches in the literature to clarify these relationships including sampling and metamodeling. Emphasizing the weaknesses and disadvantages of current methods, we present a metamodel-guided sequential sampling technique which combines random forests and uncertainty sampling. Experimental results on two well-known agent-based models show that the presented technique yields metamodels of higher accuracy compared to metamodels trained with randomly selected input{\textendash}output data. Contrary to the previous studies emphasizing only the improvement in the metamodel accuracy, we also focus on input parameter combinations selected by the sequential sampling technique, and we observe that sequential sampling is able to capture the boundaries of tipping point behaviors as well as the points exhibiting counter-intuitive behavior, thus, potentially aiding verification, validation, and understanding of agent-based models. Additionally, we propose a novel two-step method for the categorization of the agent-based model outputs prior to metamodel training, which helps the analyst to decide on whether preserving numerical model outputs or continuing the metamodel training procedure with qualitative categorical agent-based model outputs.

}, keywords = {Active learning, Agent-based modeling, Metamodeling, Output categorization, Random forest, Sequential sampling}, issn = {1569-190X}, doi = {https://doi.org/10.1016/j.simpat.2018.12.006}, url = {https://www.sciencedirect.com/science/article/pii/S1569190X18301941}, author = {Mert Edali and G{\"o}nen{\c c} Y{\"u}cel} } @article {1414, title = {Automated Analysis of Regularities Between Model Parameters and Output Using Support Vector Regression in Conjunction with Decision Trees}, journal = {Journal of Artificial Societies and Social Simulation}, volume = {21}, year = {2018}, pages = {1}, abstract = {

Opening the black-box of nonlinear relationships between model inputs and outputs, significantly contributes to the understanding of the dynamic problem being studied. Considering the weaknesses and disadvantages of human-guided and systematic techniques offered in the literature, this paper presents a model analysis and exploration tool for agent-based models. The tool first approximates input-output relationships by developing a metamodel, a simplified representation of the original agent-based model. For this purpose, it utilizes support vector regression, which is capable of approximating highly nonlinear systems accurately. Following metamodel fitting, the tool incorporates a tree-based method to extract knowledge embedded in the metamodel. The resulting tree is then expressed as a set of IF-THEN rules that have high comprehensibility compared to complex metamodel function. We utilized the tool for the exploration of Traffic Basic model and the results show the relationship between model input and output. Furthermore, rules extracted from the metamodel point out certain counter-intuitive results of the model which are not easily inferred from the raw input-output data. We also discuss potential uses of our tool and provide the R script which makes the analysis repeatable for other agent-based models.

}, keywords = {decision tree, MetaModel, R, Rule Extraction, Support Vector Regression, Traffic}, issn = {1460-7425}, doi = {10.18564/jasss.3786}, url = {http://jasss.soc.surrey.ac.uk/21/4/1.html}, author = {Edali, Mert and G{\"o}nen{\c c} Y{\"u}cel} } @article {1493, title = {The moderating impact of supply network topology on the effectiveness of risk management}, journal = {International Journal of Production Economics}, volume = {197}, year = {2018}, pages = {13-26}, abstract = {

While supply chain risk management offers a rich toolset for dealing with risk at the dyadic level, less attention has been given to the effectiveness of risk management in complex supply networks. We bridge this gap by building an agent based model to explore the relationship between topological characteristics of complex supply networks and their ability to recover through inventory mitigation and contingent rerouting. We simulate upstream supply networks, where each agent represents a supplier. Suppliers{\textquoteright} connectivity patterns are generated through random and preferential attachment models. Each supplier manages its inventory using an anchor-and-adjust ordering policy. We then randomly disrupt suppliers and observe how different topologies recover when risk management strategies are applied. Our results show that topology has a moderating effect on the effectiveness of risk management strategies. Scale-free supply networks generate lower costs, have higher fill-rates, and need less inventory to recover when exposed to random disruptions than random networks. Random networks need significantly more inventory distributed across the network to achieve the same fill rates as scale-free networks. Inventory mitigation improves fill-rate more than contingent rerouting regardless of network topology. Contingent rerouting is not effective for scale-free networks due to the low number of alternative suppliers, particularly for short-lasting disruptions. We also find that applying inventory mitigation to the most disrupted suppliers is only effective when the network is exposed to frequent disruptions; and not cost effective otherwise. Our work contributes to the emerging field of research on the relationship between complex supply network topology and resilience.

}, keywords = {Agent-based modelling, Complex supply networks, Contingent rerouting, Inventory mitigation, Random networks, Scale-free networks, Supply chain risk management}, issn = {0925-5273}, doi = {https://doi.org/10.1016/j.ijpe.2017.12.013}, url = {https://www.sciencedirect.com/science/article/pii/S092552731730419X}, author = {Anna Ledwoch and Yasarcan, Hakan and Alexandra Brintrup} } @article {1160, title = {Accelerating Transition Dynamics in City Regions: A Qualitative Modeling Perspective}, journal = {Sustainability}, volume = {9}, year = {2017}, pages = {1254}, author = {Valkering, Pieter and G{\"o}nen{\c c} Y{\"u}cel and Gebetsroither-Geringer, Ernst and Markvica, Karin and Meynaerts, Erika and Frantzeskaki, Niki} } @article {1494, title = {Effect of Lead Time on Anchor-and-Adjust Ordering Policy in Continuous Time Stock Control Systems}, journal = {Korean System Dynamics Review}, volume = {2}, year = {2017}, month = {Jun}, pages = {65{\textendash}85}, author = {Mutallip, Ahmet and Yasarcan, Hakan} } @article {1159, title = {Influence maximization based on partial network structure information: A comparative analysis on seed selection heuristics}, journal = {International Journal of Modern Physics C}, volume = {28}, year = {2017}, pages = {1750122}, author = {{\c S}irag Erkol and G{\"o}nen{\c c} Y{\"u}cel} } @article {1188, title = {The Shifting the Burden Archetype: A Workforce and Task Backlog Management Game}, journal = {Korean System Dynamics Review}, volume = {17}, year = {2017}, pages = {81-110}, author = {S.Z. G{\"u}ran and Hakan Ya{\c s}arcan} } @article {1495, title = {The Shifting the Burden Archetype A Workforce and Task Backlog Management Game}, journal = {Korean System Dynamics Review}, volume = {4}, year = {2017}, month = {Feb}, pages = {81{\textendash}110}, author = {G{\"u}ran, Seniha Zeynep and Yasarcan, Hakan} } @article {1189, title = {The Shifting the Burden Archetype: A Workforce and Task Backlog Management Game}, journal = {Korean System Dynamics Review}, volume = {18}, year = {2017}, pages = {81-110}, author = {A. Mutallip and Hakan Ya{\c s}arcan} } @proceedings {1192, title = {The Analysis of Characteristic Dynamics of Stock Management Structure with a First Order Supply Line Delay}, journal = {34th International Conference of the System Dynamics Society}, year = {2016}, address = {Delft, the Netherlands}, author = {Mehmet S and Hakan Ya{\c s}arcan} } @proceedings {1191, title = {A Conceptual Feedback Model of Performance Dynamics}, journal = {The 34th International Conference of the System Dynamics Society}, year = {2016}, address = {Delft, the Netherlands}, author = {Van den Berg, AR and Hakan Ya{\c s}arcan} } @article {1466, title = {INVESTIGATING THE POTENTIAL OF STATE-TRUNCATIONAPPROXIMATIONS FOR PRODUCTION LINES}, journal = {Stochastic Modelling and Applications}, volume = {20}, year = {2016}, month = {Dec}, pages = {91{\textendash}109}, author = {Durmu{\c s}, Deniz and YERALAN, SENCER and Aybek Korugan} } @proceedings {1190, title = {Modeling the Long Term Dynamics of Obesity as a Societal Epidemic}, journal = {34th International Conference of the System Dynamics Society}, year = {2016}, address = {Delft, the Netherlands}, author = {Akta{\c s}, Gizem and Nefel Tellio{\u g}lu and Yaman Barlas and Hakan Ya{\c s}arcan} } @article {1173, title = {A new multi-objective mathematical model for the high-level synthesis of integrated circuits}, journal = {Applied Mathematical Modelling}, volume = {40}, year = {2016}, pages = {2274{\textendash}2290}, author = {Necati Aras and Yurdakul, Arda} } @article {1496, title = {Results of a beer game experiment: Should a manager always behave according to the book?}, journal = {Complexity}, volume = {21}, year = {2016}, pages = {190-199}, abstract = {

We investigate the effect of the literature suggested optimal values of the parameters of a dynamic decision-making heuristic in the presence of semirationally managed supply chain echelons using a soft coded one-to-one version of The Beer Game as an experimental platform. According to the counterintuitive results obtained in this study, it is possible for a {\textquotedblleft}rational manager{\textquotedblright} to obtain higher costs than the costs generated by a {\textquotedblleft}semirational manager.{\textquotedblright} Thus, the results do not support the use of the well-established decision parameter values for the echelon of concern if the other echelons{\textquoteright} inventories are managed suboptimally. {\textcopyright} 2015 Wiley Periodicals, Inc. Complexity 21: 190{\textendash}199, 2016

}, keywords = {anchor-and-adjust heuristic, artificial agents, beer game, stock management, supply chain management}, doi = {https://doi.org/10.1002/cplx.21731}, url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/cplx.21731}, author = {Edali, Mert and Yasarcan, Hakan} } @proceedings {1193, title = {The Shifting the Burden Archetype: A Workforce and Task Backlog Management Game}, journal = {34th International Conference of the System Dynamics Society}, year = {2016}, address = {Delft, the Netherlands}, author = {G{\"u}ran SZ and Hakan Ya{\c s}arcan} } @article {908, title = {Metabolic connectivity as index of verbal working memory}, journal = {Journal of cerebral blood flow and metabolism}, volume = {35}, year = {2015}, month = {July}, pages = {1122{\textemdash}1126}, issn = {0271-678X}, doi = {10.1038/jcbfm.2015.40}, url = {http://dx.doi.org/10.1038/jcbfm.2015.40}, author = {Zou, Na and Chetelat, Gael and Mustafa Gokce Baydogan and Li, Jing and Fischer, Florian U and Titov, Dmitry and Dukart, Juergen and Fellgiebel, Andreas and Schreckenberger, Mathias and Yakushev, Igor} } @conference {mutallip2014desired, title = {Desired Supply Line Value Calculation for Multi-Supplier Systems}, booktitle = {The 32nd International System Dynamics Conference, Delft, Netherlands}, year = {2014}, publisher = {System Dynamics Society (http://www.systemdynamics.org/conferences/2014/index.html)}, organization = {System Dynamics Society (http://www.systemdynamics.org/conferences/2014/index.html)}, author = {Mutallip, Ahmet and Yasarcan, Hakan} } @conference {mutallip2014effect, title = {Effect of Lead Time on Anchor-and-Adjust Ordering Policy in Continuous Time Stock Control Systems}, booktitle = {The 32nd International System Dynamics Conference, Delft, Netherlands}, year = {2014}, publisher = {System Dynamics Society (http://www.systemdynamics.org/conferences/2014/index.html)}, organization = {System Dynamics Society (http://www.systemdynamics.org/conferences/2014/index.html)}, author = {Mutallip, Ahmet and Yasarcan, Hakan} } @conference {edali2014effect, title = {The Effect of Semi-Rational Supply Chain Members on the Decision Parameters Used in Managing the Stock of an Echelon}, booktitle = {The 32nd International System Dynamics Conference, Delft, Netherlands}, year = {2014}, publisher = {System Dynamics Society (http://www.systemdynamics.org/conferences/2014/index.html)}, organization = {System Dynamics Society (http://www.systemdynamics.org/conferences/2014/index.html)}, author = {Edali, Mert and Yasarcan, Hakan} } @article {Yavas2014, title = {Impact of Homophily on Diffusion Dynamics Over Social Networks}, journal = {Social Science Computer Review}, volume = {32}, number = {3}, year = {2014}, month = {mar}, abstract = {

The purpose of this study is to analyze the impact of homophily on diffusion over social networks. An agent-based simulation model is developed to serve as the experimental ground for this analysis. Diffusion dynamics of a nonsticky innovation is investigated by varying homophily levels in the social network depicted in the model as the primary control variable. First of all, the results show that homophily is self-reinforcing. Second, starting from a nonhomophilous network, early increases in the level of homophily have a positive effect on the extent of diffusion, whereas further increases have a negative impact. Finally, several local minima and maxima are observed in the relation between the homophily level and the extent of diffusion. Our analysis focuses on node properties such as connect- edness and average degrees in order to explain the observed regular relationship between homophily and diffusion. We argue that (i) homophily increases the connectedness of different status groups separately and (ii) increasing levels of homophily decreases the marginal importance of a single homo- philous tie by increasing the sources of valuable information. Future research involves investigating the coevolution of social behavior and networks by allowing the adopted innovation to lead to value homophily, exploration of different diffusion initiation types, and different adoption heuristics.

}, issn = {0894-4393}, doi = {10.1177/0894439313512464}, url = {http://ssc.sagepub.com/cgi/doi/10.1177/0894439313512464}, author = {Yava{\c s}, Mustafa and G{\"o}nen{\c c} Y{\"u}cel} } @article {1497, title = {A Mathematical Model of the Beer Game}, journal = {Journal of Artificial Societies and Social Simulation}, volume = {17}, year = {2014}, pages = {2}, abstract = {

The beer production-distribution game, in short {\textquotedblleft}The Beer Game{\textquotedblright}, is a multiplayer board game, where each individual player acts as an independent agent. The game is widely used in management education aiming to give an experience to the participants about the potential dynamic problems that can be encountered in supply chain management, such as oscillations and amplification of oscillations as one moves from downstream towards upstream echelons. The game is also used in numerous scientific studies. In this paper, we construct a mathematical model that is an exact one-to-one replica of the original board version of The Beer Game. We apply model replication principles and discuss the difficulties we faced in the process of constructing the mathematical model. Accordingly, the model is presented in full precision including necessary assumptions, explanations, and units for all parameters and variables. In addition, the adjustable parameters are stated, the equations governing the artificial agents{\textquoteright} decision making processes are mentioned, and an R code of the model is provided. We also shortly discuss how the R code can be used in experimentation and how it can also be used to create a single-player or multi-player beer game on a computer. Our code can produce the exact same benchmark cost values reported by Sterman (1989) verifying that it is correctly implemented. The mathematical model and the R code presented in this paper aims to facilitate potential future studies based on The Beer Game.

}, keywords = {Acquisition Lag, artificial agents, beer game, Mathematical Model, Replication, System Dynamics}, issn = {1460-7425}, doi = {10.18564/jasss.2555}, url = {http://jasss.soc.surrey.ac.uk/17/4/2.html}, author = {Edali, Mert and Yasarcan, Hakan} } @article {edali2014mathematical, title = {A Mathematical Model of the Beer Game}, journal = {Journal of Artificial Societies and Social Simulation}, volume = {17}, number = {4}, year = {2014}, pages = {jasss{\textendash}soc}, publisher = {Journal of Artificial Societies and Social Simulation}, author = {Edali, Mert and Yasarcan, Hakan} } @inbook {Yucel2013a, title = {The actor-option framework: a general framework for modelling socio-technical systems in transitions}, booktitle = {Infranomics: Sustainability, Engineering Design and Governance}, series = {Topics in Safety, Risk, Reliability and Quality}, volume = {24}, year = {2013}, pages = {407{\textendash}418}, publisher = {Springer International Publishing}, organization = {Springer International Publishing}, address = {Cham}, keywords = {modelling, simulation, socio-technical transitions}, isbn = {978-3-319-02492-9}, doi = {10.1007/978-3-319-02493-6}, url = {http://link.springer.com/10.1007/978-3-319-02493-6}, author = {G{\"o}nen{\c c} Y{\"u}cel}, editor = {Gheorghe, Adrian V. and Masera, Marcelo and Katina, Polinpapilinho F.} } @proceedings {nisa1, title = {Evaluation of Alternative Dynamic Behavior Representations for Automated Model Output Classification and Clustering}, journal = {31st International Conference of the System Dynamics Society}, year = {2013}, author = {Nisa {\"O}nsel and E. {\"O}nsel and G{\"o}nen{\c c} Y{\"u}cel} } @article {Yucel2013, title = {Extent of inertia caused by the existing building stock against an energy transition in the Netherlands}, journal = {Energy and Buildings}, volume = {56}, year = {2013}, pages = {134{\textendash}145}, keywords = {residential energy consumption}, issn = {03787788}, doi = {10.1016/j.enbuild.2012.09.022}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0378778812004720}, author = {G{\"o}nen{\c c} Y{\"u}cel} } @inbook {ekcsiouglu2013user, title = {A user experience study of airline websites}, booktitle = {Design, User Experience, and Usability. Web, Mobile, and Product Design}, year = {2013}, pages = {173{\textendash}182}, publisher = {Springer Berlin Heidelberg}, organization = {Springer Berlin Heidelberg}, author = {Mahmut Ek{\c s}io{\u g}lu and Kiris, Esin and \cCak{\i}r, Tu{\u g}ba and G{\"u}vendik, Merve and Koyut{\"u}rk, Efsane D and Y{\i}lmaz, Merve} } @conference {tanyolacc2012control, title = {Control Heuristics for Soft Landing Problem}, booktitle = {The 30th International System Dynamics Conference, St. Gallen, Switzerland}, year = {2012}, publisher = {System Dynamics Society (http://www.systemdynamics.org/conferences/2012/index.html)}, organization = {System Dynamics Society (http://www.systemdynamics.org/conferences/2012/index.html)}, author = {Tanyola{\c c}, Togay and Yasarcan, Hakan} } @article {Kwakkel2012, title = {An Exploratory Analysis of the Dutch Electricity System in Transition}, journal = {Journal of the Knowledge Economy}, year = {2012}, pages = {1{\textendash}16}, publisher = {Springer US}, abstract = {

Recent contextual developments constitute a backdrop of change for the Dutch electricity system. Institutional change driven by liberalization, changing economic competitiveness of the dominant fuels, new technologies, and changing end-user preferences regarding electricity supply are some exam- ples of these developments. This paper explores plausible transition trajectories in the face of these developments given technological uncertainty about invest- ment and operating costs, and fuel efficiency of various alternative technolo- gies; political uncertainty about future CO2 abatement policies such as emission trading; and socio-economic uncertainty about fuel prices, investment decisions of suppliers, and load curves. Various alternative developments for these uncertainties are specified. The consequences of each of these alternative developments are assessed using an agent-based model of the Dutch electricity system. The outputs are analyzed using various data-mining and data visualization techniques in order to reveal arch-typical transition trajectories and their conditions for occurring. Policy recommendations are derived from this. The results indicate that most transition trajectories point towards a future energy supply system that is reliant on clean coal and gas. Under the explored uncertainties, only rarely a transition to renewables occurs. The various sustainable energy support programs appear to be ineffective in steering the energy supply system towards a more sustainable mode of functioning across the various uncertainties.

}, keywords = {Electricity supply, Exploratory model, Transitions}, issn = {1868-7865}, doi = {10.1007/s13132-012-0128-1}, url = {http://dx.doi.org/10.1007/s13132-012-0128-1}, author = {Kwakkel, Jan and G{\"o}nen{\c c} Y{\"u}cel} } @conference {mutallip2012parametric, title = {A Parametric Analysis of the Effect of a Material Supply Line Delay in Stock Management}, booktitle = {The 30th International System Dynamics Conference, St. Gallen, Switzerland}, year = {2012}, publisher = {System Dynamics Society (http://www.systemdynamics.org/conferences/2012/index.html)}, organization = {System Dynamics Society (http://www.systemdynamics.org/conferences/2012/index.html)}, author = {Mutallip, Ahmet and Yasarcan, Hakan} } @article {Yucel2012, title = {A simulation-based analysis of transition pathways for the Dutch electricity system}, journal = {Energy Policy}, volume = {42}, year = {2012}, pages = {557{\textendash}568}, issn = {03014215}, doi = {10.1016/j.enpol.2011.12.024}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0301421511010299}, author = {G{\"o}nen{\c c} Y{\"u}cel and van Daalen, Cornelia} } @conference {yasarcan2012soft, title = {A Soft Landing Model and an Experimental Platform as an Introductory Control Design Tool}, booktitle = {The 30th International System Dynamics Conference, St. Gallen, Switzerland}, year = {2012}, publisher = {System Dynamics Society (http://www.systemdynamics.org/conferences/2012/index.html)}, organization = {System Dynamics Society (http://www.systemdynamics.org/conferences/2012/index.html)}, author = {Yasarcan, Hakan and Tanyola{\c c}, Togay} } @article {Yucel2011, title = {Automated parameter specification in dynamic feedback models based on behavior pattern features}, journal = {System Dynamics Review}, volume = {27}, number = {2}, year = {2011}, pages = {195{\textendash}215}, publisher = {Wiley Online Library}, keywords = {Calibration}, doi = {10.1002/sdr}, url = {http://onlinelibrary.wiley.com/doi/10.1002/sdr.457/full}, author = {G{\"o}nen{\c c} Y{\"u}cel and Yaman Barlas} } @article {Yucel2011a, title = {Exploratory analysis of the impact of information dynamics on innovation diffusion}, journal = {Technological Forecasting and Social Change}, volume = {78}, number = {2}, year = {2011}, pages = {358{\textendash}372}, publisher = {Elsevier Inc.}, keywords = {diffusion of innovations, information diffusion, negative word-of-mouth, Simulation model}, issn = {00401625}, doi = {10.1016/j.techfore.2010.11.004}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0040162510002684}, author = {G{\"o}nen{\c c} Y{\"u}cel and van Daalen, Cornelia} } @conference {yasarcan2011information, title = {Information Sharing in Supply Chains: A Systemic Approach}, booktitle = {The 29th International System Dynamics Conference, Washington, DC, USA}, year = {2011}, publisher = {System Dynamics Society (http://www.systemdynamics.org/conferences/2011/index.htm)}, organization = {System Dynamics Society (http://www.systemdynamics.org/conferences/2011/index.htm)}, author = {Yasarcan, Hakan} } @article {aras2011optimal, title = {Optimal inventory and pricing policies for remanufacturable leased products}, journal = {International Journal of Production Economics}, volume = {133}, number = {1}, year = {2011}, pages = {262{\textendash}271}, publisher = {Elsevier}, author = {Necati Aras and Refik G{\"u}ll{\"u} and Y{\"u}r{\"u}lmez, Sevil} } @conference {tanyolacc2011soft, title = {A Soft Landing Model and a Mass Spring Damper Based Control Heuristic}, booktitle = {The 29th International System Dynamics Conference, Washington, DC, USA}, year = {2011}, publisher = {System Dynamics Society (http://www.systemdynamics.org/conferences/2011/index.htm)}, organization = {System Dynamics Society (http://www.systemdynamics.org/conferences/2011/index.htm)}, author = {Tanyola{\c c}, Togay and Yasarcan, Hakan} } @article {yasarcan2011stock, title = {Stock management in the presence of significant measurement delays}, journal = {System Dynamics Review}, volume = {27}, number = {1}, year = {2011}, pages = {91{\textendash}109}, publisher = {Wiley Online Library}, author = {Yasarcan, Hakan} } @conference {cseker2010controlling, title = {Controlling the Direction of a Model Helicopter}, booktitle = {The 28th International System Dynamics Conference, Seoul, Korea}, year = {2010}, publisher = {System Dynamics Society (http://www.systemdynamics.org/conferences/2010/index.htm)}, organization = {System Dynamics Society (http://www.systemdynamics.org/conferences/2010/index.htm)}, author = {Oylum {\c S}eker and Yasarcan, Hakan} } @conference {herdem2010dynamics, title = {Dynamics of Glucose-Insulin Regulation: Insulin Injection Regime for Patients with Diabetes Type 1}, booktitle = {The 28th International System Dynamics Conference, Seoul, Korea}, year = {2010}, publisher = {System Dynamics Society (http://www.systemdynamics.org/conferences/2010/index.htm)}, organization = {System Dynamics Society (http://www.systemdynamics.org/conferences/2010/index.htm)}, author = {Herdem, Canan and Yasarcan, Hakan} } @article {Yucel2010, title = {Dynamics of the North{\textendash}South welfare gap and global sustainability}, journal = {Technological Forecasting and Social Change}, volume = {77}, number = {4}, year = {2010}, pages = {594{\textendash}614}, publisher = {Elsevier Inc.}, keywords = {north, south welfare gap}, issn = {00401625}, doi = {10.1016/j.techfore.2009.11.004}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0040162509001887}, author = {G{\"o}nen{\c c} Y{\"u}cel and Yaman Barlas} } @article {yasarcan2010improving, title = {Improving understanding, learning, and performances of novices in dynamic managerial simulation games}, journal = {Complexity}, volume = {15}, number = {4}, year = {2010}, pages = {31{\textendash}42}, publisher = {John Wiley \& Sons, Ltd}, author = {Yasarcan, Hakan} } @article {Yucel2009, title = {An objective-based perspective on assessment of model-supported policy processes}, journal = {Journal of Artificial Societies and Social Simulation}, volume = {12}, number = {4}, year = {2009}, pages = {3}, keywords = {model assessment, model typology, policy analysis, simulation, validation}, url = {http://jasss.soc.surrey.ac.uk/12/4/3.html}, author = {G{\"o}nen{\c c} Y{\"u}cel and van Daalen, Cornelia} } @article {34, title = {Toward Development of Adaptive Service-Based Software Systems}, journal = {IEEE Transactions on Services Computing}, volume = {2}, year = {2009}, pages = {247-260}, abstract = {

The rapid adoption of service-oriented architecture (SOA) in many large-scale distributed applications requires the development of adaptive service-based software systems (ASBS) with the capability of monitoring the changing system status, analyzing, and controlling tradeoffs among various quality-of-service (QoS) aspects, and adapting service configurations to satisfy multiple QoS requirements simultaneously. In this paper, our results toward the development of adaptive service-based software systems are presented. The formulation of activity-state-QoS (ASQ) models and how to use the data from controlled experiments to establish ASQ models for capturing the cause-effect dynamics among service activities, system resource states, and QoS in service-based systems are presented. Then, QoS monitoring modules based on ASQ models and SOA-compliant simulation models are developed to support the validation of the ASBS design. The main idea for developing QoS adaptation modules based on ASQ models is discussed. An experiment based on a voice communication service is used to illustrate our results.

}, keywords = {Design concepts, distributed/Internet-based software engineering tools and techniques, methodologies, modeling methodologies, quality of services, services systems}, issn = {1939-1374}, doi = {http://doi.ieeecomputersociety.org/10.1109/TSC.2009.17}, author = {Stephen S. Yau and Nong Ye and Hessam S. Sarjoughian and Dazhi Huang and Auttawut Roontiva and Mustafa Gokce Baydogan and Mohammed A. Muqsith} } @inbook {barlas2008comprehensive, title = {A comprehensive model of goal dynamics in organizations: setting, evaluation and revision}, booktitle = {Complex Decision Making}, year = {2008}, pages = {295{\textendash}320}, publisher = {Springer}, organization = {Springer}, author = {Barlas, Yaman and Yasarcan, Hakan} } @article {Yucel2008, title = {Studying transition dynamics via focusing on underlying feedback interactions}, journal = {Computational and Mathematical Organization Theory}, volume = {14}, number = {4}, year = {2008}, pages = {320{\textendash}349}, issn = {1381-298X}, doi = {10.1007/s10588-008-9032-4}, url = {http://www.springerlink.com/index/10.1007/s10588-008-9032-4}, author = {G{\"o}nen{\c c} Y{\"u}cel and Chiong Meza, Catherine Miluska} } @conference {barlas2007comprehensive, title = {A Comprehensive Model of Goal Dynamics in Organizations: Setting, Evaluation and Revision}, booktitle = {The 25th International System Dynamics Conference, Boston, MA, USA}, year = {2007}, publisher = {System Dynamics Society (http://www.systemdynamics.org/conferences/2007/proceed/index.htm)}, organization = {System Dynamics Society (http://www.systemdynamics.org/conferences/2007/proceed/index.htm)}, author = {Barlas, Yaman and Yasarcan, Hakan} } @inbook {aras2007solving, title = {Solving the capacitated multi-facility Weber problem by simulated annealing, threshold accepting and genetic algorithms}, booktitle = {Metaheuristics}, year = {2007}, pages = {91{\textendash}112}, publisher = {Springer US}, organization = {Springer US}, author = {Necati Aras and Yumusak, Sadettin and I. Kuban Altinel} } @conference {yasarcan2007stock, title = {Stock Management in the Presence of Perception Delays}, booktitle = {The 2007 Conference on Systems Science, Management Science and System Dynamics: Sustainable Development and Complex Systems, Shanghai, China}, year = {2007}, pages = {2655{\textendash}2660}, publisher = {System Dynamics Society}, organization = {System Dynamics Society}, author = {Yasarcan, H} } @article {barlas2006goal, title = {Goal setting, evaluation, learning and revision: A dynamic modeling approach}, journal = {Evaluation and Program Planning}, volume = {29}, number = {1}, year = {2006}, pages = {79{\textendash}87}, publisher = {Elsevier}, author = {Barlas, Yaman and Yasarcan, Hakan} } @article {yasarcan2005generalized, title = {A generalized stock control formulation for stock management problems involving composite delays and secondary stocks}, journal = {System dynamics review}, volume = {21}, number = {1}, year = {2005}, pages = {33{\textendash}68}, publisher = {Wiley Online Library}, author = {Yasarcan, Hakan and Barlas, Yaman} } @conference {yasarcan2005stable, title = {Stable stock management heuristics when the outflow is proportional to the control stock}, booktitle = {The 23rd International System Dynamics Conference, Boston, MA, USA}, year = {2005}, publisher = {System Dynamics Society (http://www.systemdynamics.org/conferences/2005/index.htm)}, organization = {System Dynamics Society (http://www.systemdynamics.org/conferences/2005/index.htm)}, author = {Yasarcan, Hakan and Barlas, Yaman} } @mastersthesis {yacsarcan2003feedback, title = {Feedback, delays and non-linearities in decision structures}, year = {2003}, school = {Bo{\u g}azi{\c c}i University}, type = {phd}, author = {Yasarcan, Hakan} } @conference {yasarcan2003general, title = {A general stock control formulation for stock management problems involving delays and secondary stocks}, booktitle = {The 21st International System Dynamics Conference, New York City, USA}, year = {2003}, publisher = {System Dynamics Society (http://www.systemdynamics.org/conferences/2003/index.htm)}, organization = {System Dynamics Society (http://www.systemdynamics.org/conferences/2003/index.htm)}, author = {Yasarcan, Hakan and Barlas, Yaman} } @conference {barlas2001method, title = {A Method For Finding Equilibrium Points of a Non-Linear Dynamic Model}, booktitle = {The 19th International System Dynamics Conference, Atlanta, Georgia, USA}, year = {2001}, publisher = {System Dynamics Society (http://www.systemdynamics.org/conferences/2001)}, organization = {System Dynamics Society (http://www.systemdynamics.org/conferences/2001)}, author = {Barlas, Yaman and Yasarcan, Hakan} } @conference {barlas1999bir, title = {Bir Benzetim Modeli {\"U}zerinde {\"O}SYS Sorunlar{\i}n{\i}n Analizi}, booktitle = {Cumhuriyetin 75. Y{\i}l{\i}nda {\"U}niversitelerimiz Sempozyumu ({\"U}niversite {\"O}{\u g}retim {\"U}yeleri Derne{\u g}i)}, year = {1999}, pages = {83{\textendash}112}, publisher = {Bo{\u g}azi{\c c}i {\"U}niversitesi Yay{\i}nevi}, organization = {Bo{\u g}azi{\c c}i {\"U}niversitesi Yay{\i}nevi}, author = {Barlas, Yaman and Yasarcan, Hakan} }