@article {1423, title = {An ensemble-based semi-supervised feature ranking for multi-target regression problems}, journal = {Pattern Recognition Letters}, volume = {148}, year = {2021}, pages = {36-42}, abstract = {

This study focuses on semi-supervised feature ranking (FR) applications for multi-target regression problems (MTR). As MTRs require prediction of several targets, we use a learning model that includes target interrelations via multi-objective trees. In processing the features for a semi-supervised learning model, transformation or scaling operations are usually required. To resolve this issue, we create a dissimilarity matrix via totally randomized trees to process the unsupervised information. Besides, we treat the split score function as a vector to make it suitable for considering each criterion regardless of their scales. We propose a semi-supervised FR scheme embedded to multi-objective trees that takes into account target and feature contributions simultaneously. Proposed FR score is compared with the state-of-the-art multi-target FR strategies via statistical analyses. Experimental studies show that proposed score significantly improves the performance of a recent tree-based and competitive multi-target learning model, i.e. predictive clustering trees. In addition, proposed approach outperforms its benchmarks when the available labelled data increase.

}, keywords = {Feature ranking, Multi-target regression, Semi-supervised learning}, issn = {0167-8655}, doi = {https://doi.org/10.1016/j.patrec.2021.04.025}, url = {https://www.sciencedirect.com/science/article/pii/S0167865521001641}, author = {Esra Ad{\i}yeke and Mustafa Gokce Baydogan} } @article {1542, title = {An Exact Cutting Plane Algorithm to Solve the Selective Graph Coloring Problem in Perfect Graphs}, journal = {European Journal of Operational Research}, volume = {291(1)}, year = {2021}, pages = {67{\textendash}83}, doi = {https://doi.org/10.1016/j.ejor.2020.09.017}, author = {Oylum {\c S}eker and Ekim, Tinaz and Z C Ta{\c s}k{\i}n} } @article {1420, title = {Explainable boosted linear regression for time series forecasting}, journal = {Pattern Recognition}, volume = {120}, year = {2021}, pages = {108144}, abstract = {

Time series forecasting involves collecting and analyzing past observations to develop a model to extrapolate such observations into the future. Forecasting of future events is important in many fields to support decision making as it contributes to reducing the future uncertainty. We propose explainable boosted linear regression (EBLR) algorithm for time series forecasting, which is an iterative method that starts with a base model, and explains the model{\textquoteright}s errors through regression trees. At each iteration, the path leading to highest error is added as a new variable to the base model. In this regard, our approach can be considered as an improvement over general time series models since it enables incorporating nonlinear features by residual explanation. More importantly, use of the single rule that contributes to the error most enables access to interpretable results. The proposed approach extends to probabilistic forecasting through generating prediction intervals based on the empirical error distribution. We conduct a detailed numerical study with EBLR and compare against various other approaches. We observe that EBLR substantially improves the base model performance through extracted features, and provide a comparable performance to other well established approaches. The interpretability of the model predictions and high predictive accuracy of EBLR makes it a promising method for time series forecasting.

}, keywords = {ARIMA, Decision trees, Linear regression, Probabilistic forecasting, Time series regression}, issn = {0031-3203}, doi = {https://doi.org/10.1016/j.patcog.2021.108144}, url = {https://www.sciencedirect.com/science/article/pii/S0031320321003319}, author = {Igor Ilic and Berk G{\"o}rg{\"u}l{\"u} and Mucahit Cevik and Mustafa Gokce Baydogan} } @article {1454, title = {An exact and implementable computation of the final outbreak size distribution under Erlang distributed infectious period}, journal = {Mathematical Biosciences}, volume = {325}, year = {2020}, pages = {108363}, abstract = {

This paper deals with a stochastic SIR (Susceptible{\textendash}Infected{\textendash}Recovered) model with Erlang(k,μ) distributed infectious period commonly referred as SIkR model. We show that using the total number of remaining Erlang stages as the state variable, we do not need to keep track of the stages of individual infections, and can employ a first step analysis to efficiently obtain quantities of interest. We study the distribution of the total number of recovered individuals and the distribution of the maximum number of individuals who are simultaneously infected until the end of the disease. In the literature, final outbreak size is calculated only for a small population size exactly and derivations of approximate analytic solutions from asymptotic results are suggested for larger population sizes. We numerically demonstrate that our methods are implementable on large size problem instances.

}, keywords = {Erlang distributed infectious period, Final size distribution, Markov models, Maximum size distribution, Stochastic SIR}, issn = {0025-5564}, doi = {https://doi.org/10.1016/j.mbs.2020.108363}, url = {https://www.sciencedirect.com/science/article/pii/S0025556420300547}, author = {Zeynep G{\"o}k{\c c}e {\.I}{\c s}lier and Refik G{\"u}ll{\"u} and Wolfgang H{\"o}rmann} } @article {1441, title = {Exact solution algorithms for the maximum flow problem with additional conflict constraints}, journal = {European Journal of Operational Research}, volume = {287}, year = {2020}, pages = {410-437}, abstract = {

We consider a variant of the maximum flow problem on a given directed graph where some arc pairs are incompatible or conflicting; in other words, they are not allowed to carry positive flow simultaneously. This problem, called the maximum flow problem with conflicts, is known to be strongly NP-hard. In this paper, we present mixed-integer linear programming formulations for the problem and develop exact solution methods based on Benders decomposition, branch-and-bound, and Russian Doll Search over the conflict graph which represents the conflict relations. The effectiveness of the proposed algorithms is tested on a large number of randomly generated instances. The results reveal that their performances are superior to solving the mixed-integer linear programming formulations with a commercial software.

}, keywords = {Benders decomposition, Branch-and-bound, Combinatorial optimization, Conflict, Maximum flow, Russian doll search}, issn = {0377-2217}, doi = {https://doi.org/10.1016/j.ejor.2020.04.001}, url = {https://www.sciencedirect.com/science/article/pii/S0377221720303192}, author = {Zeynep {\c S}uvak and I. Kuban Altinel and Necati Aras} } @article {1501, title = {Edge-stable equimatchable graphs}, journal = {Discrete Applied Mathematics}, volume = {261}, year = {2019}, pages = {136-147}, abstract = {

A graph G is equimatchable if every maximal matching of G has the same cardinality. We are interested in equimatchable graphs such that the removal of any edge from the graph preserves the equimatchability. We call an equimatchable graph G edge-stable if G\e, that is the graph obtained by the removal of edge e from G, is also equimatchable for any e∈E(G). After noticing that edge-stable equimatchable graphs are either 2-connected factor-critical or bipartite, we characterize edge-stable equimatchable graphs. This characterization yields an O(min(n3.376,n1.5m)) time recognition algorithm. Lastly, we introduce and shortly discuss the related notions of edge-critical, vertex-stable and vertex-critical equimatchable graphs. In particular, we emphasize the links between our work and the well-studied notion of shedding vertices, and point out some open questions.

}, keywords = {1-well-covered, Edge-criticality, Edge-stability, Maximal matching, Shedding vertex}, issn = {0166-218X}, doi = {https://doi.org/10.1016/j.dam.2018.09.033}, url = {https://www.sciencedirect.com/science/article/pii/S0166218X18305158}, author = {Zakir Deniz and Ekim, Tinaz} } @article {1455, title = {{Effect of a secondary market on a system with random demand and uncertain costs}}, journal = {International Journal of Production Economics}, volume = {209}, year = {2019}, pages = {112-120}, abstract = {

In this paper, we consider inventory and pricing decisions for a system where the customer demand can be partitioned into two segments: a primary and a secondary market. These kinds of systems are observed, for instance, in technology intensive products or services where the primary market, being more loyal, is generally not too sensitive to the pricing of the product or service. While the primary market customer demand occurs right after the introduction of the product, the secondary market customer demand typically occurs after the product matures, and these customers are much more sensitive to changes in the sales price. The purchasing costs of technology intensive products very much depend on the spot currency exchange rate, and hence can be modelled as a stochastic process. Consequently, the sales price for the primary market customers can be assumed to be a mark-up of the spot purchasing cost of the product. On the other hand, as the secondary market customers are more sensitive to the sales price, a demand model, where the customer demand explicitly depends on the selling price would be more appropriate. We try to accomplish three objectives: (1) to model the described system, (2) to find the optimal initial quantity to stock, and (3) to determine the optimal sales price for the secondary market customers.

}, keywords = {Inventory model, Price driven demand, Stochastic price}, doi = {10.1016/j.ijpe.2018.05.01}, url = {https://ideas.repec.org/a/eee/proeco/v209y2019icp112-120.html}, author = {G{\"u}rel, Y{\"u}cel and Refik G{\"u}ll{\"u}} } @article {1418, title = {Estimation of Influence Distance of Bus Stops Using Bus GPS Data and Bus Stop Properties}, journal = {IEEE Transactions on Intelligent Transportation Systems}, volume = {20}, year = {2019}, pages = {4635-4642}, doi = {10.1109/TITS.2019.2909645}, author = {Gokasar, Ilgin and Cetinel, Yigit and Mustafa Gokce Baydogan} } @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 {1161, title = {Efficient simulations for a Bernoulli mixture model of portfolio credit risk}, journal = {Annals of Operations Research}, volume = {260}, year = {2018}, pages = {113{\textendash}128}, author = {Ba{\c s}o{\u g}lu, {\.I}smail and Wolfgang H{\"o}rmann and Sak, Halis} } @article {1509, title = {Equimatchable claw-free graphs}, journal = {Discrete Mathematics}, volume = {341}, year = {2018}, pages = {2859-2871}, abstract = {

A graph is equimatchable if all of its maximal matchings have the same size. A graph is claw-free if it does not have a claw as an induced subgraph. In this paper, we provide the first characterization of claw-free equimatchable graphs by identifying the equimatchable claw-free graph families. This characterization implies an efficient recognition algorithm.

}, keywords = {Connectivity, Equimatchable graph, Factor-critical}, issn = {0012-365X}, doi = {https://doi.org/10.1016/j.disc.2018.06.043}, url = {https://www.sciencedirect.com/science/article/pii/S0012365X18302140}, author = {Saieed Akbari and Hadi Alizadeh and Ekim, Tinaz and Didem G{\"o}z{\"u}pek and Mordechai Shalom} } @proceedings {1180, title = {Edge extremal Graphs Under Degree and Matching Number Restrictions}, journal = {17th Haifa Workshop on Interdisciplinary Applications of Graphs {\textendash} CRI}, year = {2017}, author = {Ekim, Tinaz} } @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 {1090, title = {Employee Scheduling in Service Industries with Flexible Employee Availability and Demand}, journal = {Omega}, volume = {66}, year = {2017}, pages = {159-169}, doi = {http://dx.doi.org/10.1016/j.omega.2016.03.001}, author = {Semra A{\u g}ral{\i} and Z C Ta{\c s}k{\i}n and Ali Tamer {\"U}nal} } @proceedings {1182, title = {Ergonomics in design: Safety and user experience factors}, journal = {2nd International Conference on Design and Production Engineering}, year = {2017}, author = {Mahmut Ek{\c s}io{\u g}lu} } @article {1178, title = {Equimatchable graphs are C2k+ 1-free for k>= 4}, journal = {Discrete Mathematics}, volume = {339}, year = {2016}, pages = {2964{\textendash}2969}, author = {Dibek, Cemil and Ekim, Tinaz and G{\"o}z{\"u}pek, Didem and Shalom, Mordechai} } @article {icseri2015estimation, title = {Estimation of digraph costs for keyboard layout optimization}, journal = {International Journal of Industrial Ergonomics}, volume = {48}, year = {2015}, pages = {127{\textendash}138}, publisher = {Elsevier}, author = {{\.I}{\c s}eri, Ali and Mahmut Ek{\c s}io{\u g}lu} } @article {ekcsiouglu2015estimation, title = {An Estimation of Finger-Tapping Rates and Load Capacities and the Effects of Various Factors}, journal = {Human Factors: The Journal of the Human Factors and Ergonomics Society}, year = {2015}, pages = {0018720814563976}, publisher = {SAGE Publications}, author = {Mahmut Ek{\c s}io{\u g}lu and {\.I}{\c s}eri, Ali} } @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 {demange2014efficient, title = {Efficient recognition of equimatchable graphs}, journal = {Information Processing Letters}, volume = {114}, number = {1}, year = {2014}, pages = {66{\textendash}71}, publisher = {Elsevier}, author = {Demange, Marc and Ekim, Tinaz} } @article {albey2014exploratory, title = {An exploratory study of disaggregated clearing functions for production systems with multiple products}, journal = {International Journal of Production Research}, number = {ahead-of-print}, year = {2014}, pages = {1{\textendash}22}, publisher = {Taylor \& Francis}, author = {Albey, Erin{\c c} and {\"U}mit Bilge and Uzsoy, Reha} } @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} } @proceedings {ozgun, title = {Effects of Delay, Nonlinearity and Feedback on the Overall Complexity of a Stock Management Game}, journal = {30th International Conference of the System Dynamics Society}, year = {2012}, author = {Onur {\"O}zg{\"u}n and Yaman Barlas} } @article {guney2012efficient, title = {Efficient solution techniques for the integrated coverage, sink location and routing problem in wireless sensor networks}, journal = {Computers \& Operations Research}, volume = {39}, number = {7}, year = {2012}, pages = {1530{\textendash}1539}, publisher = {Elsevier}, author = {G{\"u}ney, Evren and Necati Aras and I. Kuban Altinel and Ersoy, Cem} } @article {1477, title = {Evaluation of economically optimal retrofit investment options for energy savings in buildings}, journal = {Energy and Buildings}, volume = {49}, year = {2012}, pages = {327-334}, abstract = {

In this study, a techno-economic evaluation method for the energy retrofit of buildings is introduced, geared toward finding the economically optimal set of retrofit measures. Split incentives of building owners and users are considered explicitly in a conventional (static) evaluation to identify the investment alternatives maximizing the net present value (NPV). Energy price uncertainty for various distributional assumptions of the stochastic variables is addressed through Monte Carlo simulation. Results from the simulation are used to compute probabilities and expected NPVs. Based on this, a sequential (dynamic) evaluation method is developed, featuring a real options investment appraisal. The real options approach is introduced as an advancement in the practice of economic evaluation of building retrofit investment options. The new method is applied to an office building in Germany, illustrating its performance. The case study results indicate that energy price changes significantly affect the profitability of retrofit investments, and that high price volatility creates a substantial value of waiting, making it more rational to postpone the investment.

}, keywords = {Building energy efficiency, Energy conservation, Net present value, Real options}, issn = {0378-7788}, doi = {https://doi.org/10.1016/j.enbuild.2012.02.022}, url = {https://www.sciencedirect.com/science/article/pii/S0378778812000990}, author = {G{\"u}rkan Kumbaro{\u g}lu and Reinhard Madlener} } @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} } @article {eksioglu2011endurance, title = {Endurance time of grip-force as a function of grip-span, posture and anthropometric variables}, journal = {International Journal of Industrial Ergonomics}, volume = {41}, number = {5}, year = {2011}, pages = {401{\textendash}409}, publisher = {Elsevier}, author = {Mahmut Ek{\c s}io{\u g}lu} } @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} } @article {13288019, title = {{An efficient heuristic for placement, scheduling and routing in wireless sensor networks}}, journal = {Ad Hoc Networks}, volume = {8}, year = {2010}, pages = {654{\textendash}667}, doi = {10.1016/j.adhoc.2010.01.005}, author = {Yavuz Boga{\c c} T{\"u}rkogullari and Necati Aras and I. Kuban Altinel and Cem Ersoy} } @article {13988334, title = {{Efficient integer programming formulations for optimum sink location and routing in heterogeneous wireless sensor networks}}, journal = {Computer Networks}, volume = {54}, year = {2010}, pages = {1805{\textendash}1822}, doi = {10.1016/j.comnet.2010.02.009}, author = {Evren G{\"u}ney and Necati Aras and I. Kuban Altinel and Cem Ersoy} } @article {erol2010exploring, title = {Exploring reverse supply chain management practices in Turkey}, journal = {Supply Chain Management: An International Journal}, volume = {15}, number = {1}, year = {2010}, pages = {43{\textendash}54}, publisher = {Emerald Group Publishing Limited}, author = {Erol, Ismail and Velioglu, Meltem Nurtanis and Serifoglu, Funda Sivrikaya and B{\"u}y{\"u}k{\"o}zkan, G{\"u}l{\c c}in and Necati Aras and Cakar, Nigar Demircan and Aybek Korugan} } @book {47738327, title = {{Efficient Lower and Upper Bounds for the Multi-commodity Capacitated Multi-facility Weber Problem with Rectilinear Distances}}, series = {Logistik Management}, year = {2009}, doi = {10.1007/978-3-7908-2362-2_11}, author = {M. Hakan Aky{\"u}z and Temel {\"O}ncan and I. Kuban Altinel} } @conference {Derflinger;Hoermann;Leydold;Sak:2009a, title = {Efficient Numerical Inversion for Financial Simulations}, booktitle = {Monte Carlo and Quasi-Monte Carlo Methods 2008}, year = {2009}, pages = {297{\textendash}304}, publisher = {Springer-Verlag}, organization = {Springer-Verlag}, address = {Heidelberg}, author = {Derflinger, Gerhard and Wolfgang H{\"o}rmann and Leydold, Josef and Sak, Halis} } @article {oner2008economic, title = {Economic lot scheduling with uncontrolled co-production}, journal = {European Journal of Operational Research}, volume = {188}, number = {3}, year = {2008}, pages = {793{\textendash}810}, publisher = {Elsevier}, author = {{\"O}ner, Selma and Taner Bilgi{\c c}} } @conference {50713928, title = {{An efficient heuristic for placement, scheduling and routing in wireless sensor networks}}, booktitle = {International Symposium on Computer and Information Sciences}, year = {2008}, doi = {10.1109/ISCIS.2008.4717856}, author = {Yavuz Boga{\c c} T{\"u}rkogullari and Necati Aras and I. Kuban Altinel and Cem Ersoy} } @article {aras2008efficient, title = {Efficient heuristics for the rectilinear distance capacitated multi-facility Weber problem}, journal = {Journal of the Operational Research Society}, volume = {59}, number = {1}, year = {2008}, pages = {64{\textendash}79}, publisher = {Nature Publishing Group}, author = {Necati Aras and Orbay, M and I. Kuban Altinel} } @conference {guney2008efficient, title = {Efficient integer programming formulations for optimum sink location and routing in wireless sensor networks}, booktitle = {Computer and Information Sciences, 2008. ISCIS{\textquoteright}08. 23rd International Symposium on}, year = {2008}, pages = {1{\textendash}6}, publisher = {IEEE}, organization = {IEEE}, author = {Guney, E and I. Kuban Altinel and Necati Aras and Ersoy, Cem} } @article {4777890, title = {{Exact solution procedures for the balanced unidirectional cyclic layout problem}}, journal = {European Journal of Operational Research}, volume = {189}, year = {2008}, pages = {609{\textendash}623}, doi = {10.1016/j.ejor.2006.09.094}, author = {Temel {\"O}ncan and I. Kuban Altinel} } @article {MenEtAl2007, title = {An Exact Approach to Direct Aperture Optimization in IMRT Treatment Planning}, journal = {Physics in Medicine and Biology}, volume = {52}, number = {24}, year = {2007}, pages = {7333-7352}, doi = {http://dx.doi.org/10.1088/0031-9155/52/24/009}, author = {Chunhua Men and H. Edwin Romeijn and Z C Ta{\c s}k{\i}n and James F. Dempsey} } @article {50507263, title = {{Effective coverage in sensor networks: Binary integer programming formulations and heuristics}}, volume = {9}, year = {2006}, pages = {4014{\textendash}4019}, doi = {10.1109/ICC.2006.255709}, author = {I. Kuban Altinel and Necati Aras and Evren G{\"u}ney and Cem Ersoy} } @proceedings {kizilaslaneffects, title = {EFFECTS OF FREQUENCY, GRIP FORCE, AND GENDER ON THE PERCEPTION OF STEERING WHEEL LONGITUDINAL VIBRATION}, year = {2006}, author = {K{\i}z{\i}laslan, Kemal and Mahmut Ek{\c s}io{\u g}lu and Amman, Scott A} } @conference {ekcsiouglu2005ergonomic, title = {Ergonomic Evaluation Of OCS Audit Station}, booktitle = {Proceedings of XIX Annual International Occupational Ergonomics and Safety Conference (CD-ROM)}, year = {2005}, pages = {403{\textendash}409}, author = {Mahmut Ek{\c s}io{\u g}lu and Lammers, E and Dye, S and Raftery, R} } @article {aras2004effect, title = {The effect of categorizing returned products in remanufacturing}, journal = {IIE Transactions}, volume = {36}, number = {4}, year = {2004}, pages = {319{\textendash}331}, publisher = {Taylor \& Francis}, author = {Necati Aras and Boyaci, Tamer and Verter, Vedat} } @article {Tirler;etal:2004a, title = {An Error in the {Kinderman-Ramage} Method and How to Fix It}, journal = {Computational Statistics and Data Analysis}, volume = {47}, number = {3}, year = {2004}, pages = {433{\textendash}440}, author = {Tirler, G{\"u}nter and Dalgaard, Peter and Wolfgang H{\"o}rmann and Leydold, Josef} } @article {1484, title = {Energy and Climate Policy Analysis with the Hybrid Bottom Up Computable General Equilibrium Model SCREEN The Case of the Swiss CO2 Act}, journal = {Annals of Operations Research}, volume = {121}, year = {2003}, month = {Jul}, pages = {181{\textendash}203}, author = {G{\"u}rkan Kumbaro{\u g}lu and Madlener, Reinhard} } @article {1483, title = {Environmental Taxation and Economic Effects A Computable General Equilibrium Analysis for Turkey}, journal = {Journal of Policy Modeling}, volume = {25}, year = {2003}, month = {Nov}, pages = {795{\textendash}810}, author = {G{\"u}rkan Kumbaro{\u g}lu} } @article {1485, title = {Endogenising emission taxes: A general equilibrium type optimisation model applied for Turkey}, journal = {Energy Policy}, volume = {29}, year = {2001}, pages = {1045-1056}, abstract = {

This paper presents a modelling attempt to endogenise the level and timing of environmental taxes within an optimisation framework. First, a base model of energy{\textendash}economy{\textendash}environmental interactions is extended to allow for exogenous tax analysis. Two types of environmental taxes, one on the sulphur content of fuels and the other on the level of emissions, are exogenously included in the model as alternative instruments to mitigate pollution. Next, the base model is modified to endogenise pollution abatement. This has been achieved by incorporating a preference rate, depending on an index of emissions, into the utility function. Finally, the emission index and emission tax are taken as substitutes and modelled within a CES form to endogenise the emission tax. Results for all cases, obtained with Turkish data, are discussed. It is found that a tax on SO2 emissions is more effective in reducing SO2 emissions than a tax applied on the sulphur content of fuels. It is also found that a gradually increasing tax is more effective in reducing emissions than a constant tax.

}, keywords = {Emission taxation, Endogenous pollution abatement, Energy{\textendash}economy modelling}, issn = {0301-4215}, doi = {https://doi.org/10.1016/S0301-4215(01)00032-5}, url = {https://www.sciencedirect.com/science/article/pii/S0301421501000325}, author = {Y{\i}ld{\i}z Ar{\i}kan and G{\"u}rkan Kumbaro{\u g}lu} } @conference {zhuang2001ergonomic, title = {Ergonomic evaluation of a prototype assistive device for moving residents up in bed}, booktitle = {Proceedings of the 6th Annual International Conference on Industrial Engineering-Theory, Applications and Practice (CD-ROM)}, year = {2001}, author = {Zhuang, Ziqing and Mahmut Ek{\c s}io{\u g}lu} } @conference {eksioglu2000effects, title = {Effects of grip span and shoulder posture on endurance limit of force}, booktitle = {IEA 2000/HFES 2000: 14thTriennial Congress}, year = {2000}, author = {Mahmut Ek{\c s}io{\u g}lu} }