mgcojocaru-math - Publications

Publications

Articles

(bold names are HQP)

Mathis, S. M., Webber, A. E., Basu, A., Drake, J. M., White, L. A., Murray, E. L., ... & Borchering, R. K. (2023). Evaluation of FluSight influenza forecasting in the 2021-22 and 2022-23 seasons with a new target laboratory-confirmed influenza hospitalizations. medRxiv, 2023-12 (submitted to: Nature Communications)

www.medrxiv.org/content/10.1101/2023.12.08.23299726v1

Samir Adly, M.-G. Cojocaru, Ba Khiet Le (2023), State-Dependent Sweeping Processes: Asymptotic Behavior and Algorithmic Approaches, submitted to JOTA (Journal of Opt. Theory and Appl.)

E. W. Thommes, Z. Mohammadi, D. F. Primrose, S. Smook, G. Gomez, S. S. Chaves, L. Coudeville, R. V. Aalst, C. Mahe, M. G. Cojocaru (2023), An analytic mobility-incidence model with application to COVID-19 in the U.S., submitted to: Journal of Biological Dynamics, T&F.

Sarah Smook, David Lyver, Lia Humphrey, Zahra Mohammadi, M. G. Cojocaru (2023), A framework for behaviour quantification vis-a-vis adoption of public policy measures - lessons from nonpharmaceutical measures during COVID-19, to be submitted to Results in Applied Mathematics.

Mohammadi, Z., Cojocaru, M-G., Arino, J., Hurford, A. (2023), Importation models for travel-SARS-CoV-2 cases reported in Newfoundland and Labrador during the COVID-19 pandemic, submitted to PlosGPH. MedRxiv: https://doi.org/10.1101/2023.06.08.2329113

Accepted/Appeared:

Pengfei Yue, Allan R. Willms, Monica G. Cojocaru (2023), Parameter Estimation of Hodgkin-Huxley Model: A Comparative Study of Genetic Algorithm and Artificial Neural Network Approach, submitted to: AMMCS 2023 Proceedings (in review).

B. Benteke, M. G. Cojocaru, Mihai Nica, K. Tarasuk (2023), Heuristic approaches to solving jointly convex generalized Nash games, In upcoming: Mathematical Analysis, Differential Equations and Applications (Eds: P. Pardalos, T. Rassias), World Scientific Publishing.

David Lyver, Mihai Nica, Corentin Cot, Giacomo Cacciapaglia, Zahra Mohammadi, Edward W. Thommes, Monica-Gabriela Cojocaru (2023), Population mobility, well-mixed clustering and disease spread: a look at COVID-19 Spread in the United States and preventive policy insights, to appear in: Mathematical Biosciences and Engineering, https://arxiv.org/abs/2311.15045

Mohammadi, Z., Cojocaru, M. G., Thommes, E. W. (2022), Human behaviour, NPI and mobility reduction effects on COVID-19 transmission in different countries of the world, medRxiv 2022 doi: https://doi.org/10.1101/2022.04.29.22274485, to appear in: BMC Public Health.

Flynn-Primrose, D., Hoover, N., Mohammadi, Z., Hung, A., Lee, J., Tomovici, M., Thommes, E. W., Neame, D., Cojocaru, M. G. (2022), Meaningful Contact Estimates among Children in a Day Care Centre with Applications to Contact Matrices in Infectious Disease Modelling, to appear in: Journal of Applied Mathematics and Physics

R. Fields, L. Humphrey, M. Nahirniak, D. Flynn-Primrose, E. W. Thommes, M. G. Cojocaru (2021), Age-stratified transmission model of COVID-19 in Ontario with human mobility, Helyion Mathematics: http://pubmed.ncbi.nlm.nih.gov/34514179/

R. Fields, L. Humphrey, E. W. Thommes, M. G. Cojocaru (2021), COVID-19 in Ontario: modelling the pandemic by age groups incorporating preventative rapid-testing, Chapter to appear in: The Fields Institute Communications, Springer.
S. Z.Valtchev, A. Asgary, M. Chen, F. Cronemberger, M. M. Najafabadi, M. G. Cojocaru, J. Wu, (2021): A Simulation Based Artificial Intelligence Model of Preventative Testing of SARS-CoV-2 in Schools, to appear in: Electronics (MDPI)

Lia Humphrey, Edward W. Thommes, Roie Fields, Laurent Coudeville, Naseem Hakim, Ayman Chit, and Monica G. Cojocaru (2021), Large-scale Frequent Testing and Tracing to Supplement Control of Covid-19 and Vaccination Rollout Constrained by Supply, in: Infectious Disease Modelling, https://doi.org/10.1016/j.idm.2021.06.008

Lequyer, J., Cojocaru, M. G., (2021), The replicator dynamics for generalized Nash games with shared constraints, to appear in: Mathematics in Applied Sciences and Engineering

M. Nahirniak, M. G. Cojocaru, Migot, T. (2020), A Leader-Followers Game of Emergency Preparedness for Adverse Events, in: Mathematics in Applied Sciences and Engineering

Asgary, A., Cojocaru, M. G., Najafabadi, M. M., Wu, J., (2020), Simulating Preventative Testing of SARS-CoV-2 in Schools: Policy Implications, in: BMC Public Health

Migot, T., Cojocaru, M. G. (2020), A decomposition method for a class of convex generalized Nash equilibrium problems. Optimization and Engineering, pp.1-27.

Migot, T., Cojocaru, M. G. (2020), On Minty variational inequalities and evolutionary stable states of generalized stable games, to appear in: Operations Research Letters.

Migot, T., Cojocaru, M. G. (2020), Revisiting Path-Following to Solve the Generalized Nash Equilibrium Problem , accepted in: AMMCS Springer Proceedings.

Migot, T., Cojocaru, M. G. (2020), Nonsmooth dynamics of generalized Nash games, J. Nonlinear Var. Anal. 4, No. 1., 27-44.

Cojocaru M.-G., Migot, T., Jaber, A. S. (2019), Controlling infection in a predator-prey model with transmission dynamics, to appear in: Infectious Disease Modelling.

Migot, T., Cojocaru, M.-G. (2019), A Parametrized Variational Inequality Approach to Compute All the Solutions of the Generalized Nash Equilibrium Problem, European Journal of Operational Research. 2020 Jun 16;283(3):1136-47.

Cojocaru, M.-G., Etbaigha, F., (2019), Equilibria of parametrized N-player nonlinear games using inequalities and nonsmooth dynamics, to appear in: Computational Mathematics and Variational Analysis (N. J. Daras, T. M. Rassias (eds.)), Springer Optimization and Its Applications 159, https://doi.org/10.1007/978-3-030-44625-3_3

Athar, S., Cojocaru, M.-G., Thommes, E. W., (2018), Vaccinating policy models as leader-follower games with risk-perception transition states, in: Infectious Disease Modelling.

Cojocaru, M.-G., Thommes, E., Gillies, S. (2018), A model of residential mail delivery with drones, to appear in: MOPTA 2017 Proceedings, Springer.

Cojocaru, M.-G., Jaber, A., S., (2018), Optimal control of a vaccinating game toward increasing overall coverage, Journal of Applied Mathematics & Physics, Vol. 6, No. 4, 754-769.

Cojocaru, M.-G., Wild, E., Small, A., (2018), On describing the solution sets of generalized Nash games with shared constraints, Optimization and Engineering, Volume 19, Issue 4, pp 845–870.

Jaber A. S., Cojocaru M.-G. (2017). The optimal control of Axelrod's social norm game. Optim Control Appl Meth.;1–14. https://doi.org/10.1002/oca.2390

Cojocaru, M.-G., Greenhalgh, S., (2017) Evolution solutions of equilibrium problems - a computational approach to appear in: MATHEMATICAL ANALYSIS, APPROXIMATION THEORY AND THEIR APPLICATIONS (T. M. Rassias & V. Gupta Eds.), Springer Optimization and Its Applications 111, 121--138.

Tully, S., Cojocaru, M. G., Bauch, C. T. (2017). Multiplayer games and HIV transmission via casual encounters. Mathematical Biosciences & Engineering, 14(2), 359-376.

Wild E., Cojocaru M.-G. (2016) Runaway Competition: A Correction and Extension of Results for a Model of Competitive Helping. PLoS ONE 11(10): e0164188. doi:10.1371/journal.pone.0164188.

Cojocaru, M.-G., Greenhalgh, S., (2016), Non-equilibrium solutions of dynamic networks: A hybrid system approach, in: (Daras, Nicholas J., Rassias, Themistocles M. (Eds.), OPERATIONS RESEARCH, ENGINEERING, AND CYBER SECURITY: Trends in Applied Mathematics and Technology, Springer Optimization and its Applications, pp. 299-315.

Thommes E.W., Cojocaru M.G., Athar S. (2016) Absenteeism Impact on Local Economy During a Pandemic via Hybrid SIR Dynamics. In: Kotsireas I., Nagurney A., Pardalos P. (eds) Dynamics of Disasters—Key Concepts, Models, Algorithms, and Insights. DOD 2015 2016. Springer Proceedings in Mathematics & Statistics, vol 185. Springer, Cham

Tully, S., Cojocaru, M.-G., Bauch, C. (2015), Sexual behavior, risk perception, and HIV transmission can respond to HIV antiviral drugs and vaccines through multiple pathways. Scientific Reports, 5, 15411.

Athar, S., Cojocaru, M.-G. (2015), Time-dependent casual encounter games and HIV spread, in: J. Bélair, I. Frigaard I, H. Kunze, R. Makarov, R. Melnik, R. Spiteri (Eds.), Mathematical and Computational Approaches in Advancing Modern Science and Engineering, Springer, AMMCS-CAIMS 2015, Waterloo, Canada, 2016, pp. 177-187.

Etbaigha, F., Cojocaru, M.-G., (2015), Bifurcations in the solution structure of market equilibrium problems, in: J. Bélair, I. Frigaard I, H. Kunze, R. Makarov, R. Melnik, R. Spiteri (Eds.), Mathematical and Computational Approaches in Advancing Modern Science and Engineering, Springer, AMMCS-CAIMS 2015, Waterloo, Canada, 2016, pp. 537-548.

Nguyen, S., Cojocaru, M. G., Thommes, E. (2014), Personal Efficiency in Highway Driving: An Agent-Based Model of Driving Behaviour from a System Design Viewpoint, in:IEEE 27-th Canadian Conference on Electrical and Computer Engineering (CCECE) 2014 Proceedings, 1-6, DOI: 10/1109/CCECE.2014.691101

Andrews, M., Thommes, E., Cojocaru, M.-G. (2014), Replicator Dynamics vs. Agent-based Models in Axelrod's Norm Games, in:Interdisciplinary Topics in Applied Mathematics, Modeling and Computer Science, M. Cojocaru et al. (Eds.), ISBN: 978-3-319-12306-6, (c) 2015, Springer, PROMS Vol. 117.

Cojocaru, M.-G., Hogg, C., Kuusela, C., Thommes, E. (2014), Adoption of new products with global and local social influence in a 2-d characteristics space, in: Interdisciplinary Topics in Applied Mathematics, Modeling and Computer Science, M. Cojocaru et al. (Eds.), ISBN: 978-3-319-12306-6, (c) 2015, Springer, PROMS Vol. 117.

Tully, S., Bauch, C., Cojocaru, M.-G., (2013), Coevolution of risk perception, sexual behaviour, and HIV transmission in an agent-based model, Journal of Theoretical Biology, Volume 337, 21 November 2013, Pages 125-132.

Cojocaru, M.-G., Thille, H., Thommes, E., Nelson, D., Greenhalgh, S. (2013) Dynamics of social interaction and its effects on demand for eco-products, Environmental Modelling and Software, Vol. 50, 169-185.

Thille, H., Cojocaru, M.-G., Thommes, E., (2013), A Dynamic Pricing Game in a Model of New Product Adoption with Social Influence, in: 2013 ASE/IEEE International Conference on Economic Computing Refereed Proceedings, 762-767, DOI: 10.1109/SocialCom.2013.114

Cojocaru, M.-G., Greenhalgh, S. (2012), Dynamic games and hybrid dynamical systems , Optimization and Engineering, Applications of Variational Inequalities Issue, Volume 13 Issue 3, 505 - 517.

2011-2012 - parental leave

Cojocaru, M.-G., Pia, S. (2011) Non-pivot and implicit projected dynamical systems on Hilbert spaces. J. Func. Spaces Applications, Volume 2012 (2012), Article ID 508570, 23 pages.

Ashlock, D., Kuusela, C., Cojocaru, M. -G. (2011), Shopkeeper Strategies in the Iterated Prisoner's Dilemma, Congress on Evolutionary Computation (CEC), 2011 IEEE, DOI: 10.1109/CEC.2011.5949735

Barbagallo, A., Cojocaru, M.-G., Dynamic vaccination games and variational inequalities on time-dependent sets, Journal of Biological Dynamics, Vol. 4, No.6 (2010), 539-558.

Thommes, E., Thille, H, Cojocaru, M.-G., Nelson, D., A time-dependent ABM model of an eco-product market with social interactions and dynamic pricing schemes, IEEE proceedings of TIC-STH 2009.

Barbagallo, A., Cojocaru, M.-G., Continuity of solutions for parametric variational inequalities in Banach space J. Math. Anal. Appl. 351 (2009) 707-720.

Cojocaru, M.-G., Bauch, C. Vaccination strategy dynamics of population groups with distinct perceived probabilities of infection, JIPAM Volume 10 (2009), Issue 1, Article 3.

Barbagallo, A. and Cojocaru, M.-G., Dynamic equilibrium formulation of the oligopolistic market problem, Mathematical and Computer Modelling 49 (2009) 966-976.

Johnston, M. D., Cojocaru, M.-G., Equilibria and Periodic Solutions Of Projected Dynamical Systems On Sets with Corners, Australian Journal of Mathematical Analysis and Applications (2008), Vol. 5 Issue 2.

Cojocaru, M.-G., Dynamic equilibria of group vaccination strategies in a heterogeneous population, Journal of Global Optimization, Vol. 40, No. 1-3, (2008), 51-63.

Cojocaru, M.-G., Piecewise solutions of evolutionary variational inequalities. Consequences for the double-layer dynamicsmodelling of equilibrium problems , Journal of Inequalities in Pure and Applied Mathematics, Vol. 8, Issue 3, 2007, article 63.

Cojocaru, M.-G., Double-layer dynamics theory and human migration after catastrophic events in: "Nonlinear analysis with applications in Economics, Energy and Transportation", Editors E.Allevi, M.Bertocchi, A.Gnudi, I.V.Konnov, Bergamo University Press, 2007, 65-86.

Cojocaru, M.-G., Bauch, C., Johnston, M., Dynamics of vaccination strategies via projected dynamical systems, Bulletin of Mathematical Biology 69, (2007) 1453-76.

Cojocaru, M.-G. Monotonicity and existence of periodic cycles for projected dynamical systems on Hilbert spaces, Proc. Amer. Math. Soc. 134 (2006) 793-804.

Cojocaru, M.-G. Infinite-dimensional projected dynamics and the 1-dimensional obstacle problem, J. Func. Spaces Applic., Vol. 3 No. 3 (2005).

Cojocaru, M.-G., Daniele P., NagurneyA., Double-layered dynamics: a unified theory of projected dynamical systems and evolutionary variational inequalities, EJOR Vol 175 no. 6 (2006) 494--507.

Cojocaru, M.-G., Daniele, P., Nagurney, A. Projected dynamical systems and evolutionary variational inequalities via Hilbert spaces and applications, JOTA 127 No. 3 (2005), 549 - 563.

Nagurney A., Liu Z., Cojocaru, M.-G., Daniele, P. Dynamic Electric Power Supply Chains and Transportation Networks: An Evolutionary Variational Inequality Formulation, Transportation Research Part E, 43 (5), (2007) 624-646.

Cojocaru, M.-G. and Jonker, L. B.,Existence of solutions to projecteddifferential equations on Hilbert spaces, Proceedings of the AMS, Volume 132, Number 1, 183-193 (2004).

Isac, G. and Cojocaru, M.-G., The projection operator in a Hilbert space and its directional derivative. Consequences for the theory of projected dynamical systems , Journal of Function Spaces and Applications, Volume 2, Number 1(2004), 71-95.

Isac, G. and Cojocaru, M.-G., Functions without exceptional family of elements and thesolvability of variational inequalities on unbounded sets, Topological Methods in Nonlinear Analysis, Journal of the Juliusz Schauder Center, Volume 20(2002), 375-391.

Isac, G. and Cojocaru, M.-G., Variational inequalities, complementarity problems and pseudo-monotonicity. Dynamical aspects , Seminar on Fixed Point Theory Cluj-Napoca", Vol. 3(2002) 41-62.

King, A., Cojocaru, M.-G. et al., Web-hosting service level agreements, Proceedings of the Pacific Institute of Mathematical Sciences Workshop, June-2001 and IBM Research Reports, January 2002, RC 22301 (W0201-059).

Book chapters:

Cojocaru, M.-G., Hawkins, S., Thille, H., Thommes, E., (2009), Double layer and hybrid dynamics of equilibrium problems - applications to markets of environmental products in: Nonlinear Analysis and Optimization, Springer-Verlag (P. Pardalos, T. M. Rassias, A. Khan Eds).

Cojocaru, M.-G., Daniele P., Nagurney A., (2006), Projected Dynamical Systems, Evolutionary Variational Inequalities, Applications, and a Computational Procedure in: "Pareto Optimality, Game Theory and Equilibria", (A. Migdalas,P. Pardalosand L. Pitsoulis Eds.), Nonconvex Optimization and its Applications Series (NOIA), Kluwer Academic Publishers.

Theses

Cojocaru, M. G.,

Projected dynamical systems on Hilberts paces, Ph. D. Thesis, August 2002.

The Geometry of the Lorentz Group as a Lie Group, M. Sc. Thesis, June 1997.

Articles

Submitted:

Mohammadi, Z., Cojocaru, M-G., Arino, J., Hurford, A. (2023), Importation models for travel-related SARS-CoV-2 cases reported in Newfoundland and Labrador during the COVID-19 pandemic, submitted to PNASNEXUS. MedRxiv: https://doi.org/10.1101/2023.06.08.2329113