You can also check my publications at Mathscinet, Researcher ID, SCOPUSORCID, and ResearchGate.

ANALYSIS & APPLIED MATHEMATICS (LINEAR DYNAMICS, PARTIAL DIFFERENTIAL EQUATIONS & ALGEBRAIC STRUCTURES IN ANALYSIS).

I am working on chaotic dynamics linear operators on infinite-dimensional spaces, from the point of view of Operator Theory and Functional Analysis. These processes can be modelled through PDE’s or infinite systems of coupled ODE’s.  I am also interested in the study of large algebraic structures of pathological mathematical objects with nice properties (lineability & algebrability). Recently, I am also interested in Fractional Calculus and its applications.

  1. J. Bonet and J.A. Conejero, The sets of monomorphisms and of almost open operators between locally convex spaces, Proc. Amer. Math. Soc. 129 (2001), no. 12, 3683-3690 (electronic). Link
  2. J. Bonet and J.A. Conejero, Duality for monomorphisms and almost open operators between locally convex spaces, Bull. Soc. Roy. Sci. Liège 70 (2001), no. 4-6, 183-193 (2002), Hommage à Pascal Laubin. Link
  3. T. Bermúdez, A. Bonilla, J.A. Conejero, and A. Peris, Hypercyclic, topologically mixing and chaotic semigroups on Banach spaces, Studia Math. 170 (2005), no. 1, 57-75. doi:10.4064/sm170-1-3
  4. J.A. Conejero and A. Peris, Linear transitivity criteria, Topology Appl. 153 (2005), no. 5-6, 767-773. doi:10.1016/j.topol.2005.01.009
  5. J. Bès and J.A. Conejero, Hypercyclic subspaces in omega, J. Math. Anal. Appl. 316 (2006), no. 1, 16-23. doi:10.1016/j.jmaa.2005.04.083
  6. J.A. Conejero, V. Müller, and A. Peris, Hypercyclic behaviour of operators in a hypercyclic C0-semigroup,  J. Funct. Anal. 244 (2007), 342-348. doi:10.1016/j.jfa.2006.12.008
  7. J.A. Conejero, Enlargements of operators between locally convex spaces, RACSAM Rev. R. Acad. Cienc. Exactas Fís. Nat. Ser. A Mat., 101 (2007), no.1, 45-50. Link
  8. R. Aron, J.A. Conejero, A. Peris and J.B. Seoane-Sepúlveda, Powers of hypercyclic functions for some classical hypercyclic operators, Integr. equ. oper. theory, 58 (2007), no. 4, 591-596.   doi:10.1007/s00020-007-1490-4
  9. R. Aron, J.A. Conejero, Alfredo Peris and J.B. Seoane-Sepúlveda, Sums and products of bad functions, Jarosz, Krzysztof (ed.), Function spaces. Proceedings of the 5th conference, Edwardsville, IL, USA, May 16-20, 2006. Providence, RI: American Mathematical Society. Contemp. Math. 435, 47-52 (2007). Link
  10. J.A. Conejero, On the existence of transitive and topologically mixing semigroups,  Bull. Belg. Math. Soc. Simon-Stevin, 14 (2007), no. 3, 463-471. Link
  11. J.A. Conejero and A. Peris, Chaotic translation semigroups, Discrete Contin. Dyn. Syst. Ser. A, Supplement volume (2007), 269-276. Link
  12. J.A. Conejero and A. Peris, Hypercyclic translation C0-semigroups on complex sectors. Discrete Contin. Dyn. Syst. Ser. A 25 (2009) 1195-1208. doi:10.3934/dcds.2009.25.1195
  13. J.A. Conejero and V. Müller, On the universality of multipliers on H(C). Journal Aprox. Th. 162 (2010) 1025-1032. doi: 10.1016/j.jat.2009.11.009
  14. J.A. Conejero and E.M. Mangino , Hypercyclic semigroups generated by Ornstein-Uhlenbeck operators. Mediterr. J. Math. 7  (2010), no. 1, 101-109. doi: 10.1007/s00009-010-0030-7
  15. R. Aron, J. A. Conejero, A. Peris, and J.B. Seoane-Sepúlveda, Uncountably generated algebras of everywhere surjective functions. Bull. Belg. Math. Soc. Simon-Stevin. 17(2010), no. 3, 571-575. Link
  16. J.A. Conejero, A. Peris, and M. Trujillo, Chaotic asymptotic behaviour of the hyperbolic heat transfer equation solutions.  Internat. J. Bifur. Chaos Appl. Sci. Engrg. 20 (2010), no. 9, 2943-2947. doi: 10.1142/S0218127410027489
  17. J.A. Conejero and F. Martínez-Giménez, Chaotic differential operators, RACSAM Rev. R. Acad. Cienc. Exactas Fís. Nat. Ser. A Mat. 105, 423-431 (2011). doi: 10.1007/s13398-011-0026-6
  18. X. Barrachina and J.A. Conejero, Devaney chaos and distributional chaos in the solution of certain partial differential equations. Abstr. Appl. Anal. 2012 (2012), article ID 457019, 11 pages. doi:10.1155/2012/457019
  19. J.A. Conejero, P. Jiménez-Rodríguez, G.A. Muñoz-Fernández, and J.B. Seoane-Sepúlveda, When the Identity Theorem “Seems” to fail. Amer. Math. Monthly   121, no. 1, 60-68. doi:10.4169/amer.math.monthly.121.01.060
  20. J. Bès and J.A. Conejero. An extension of hypercyclicity for N-linear operators. Abstr. Appl. Anal. 2014 (2014), article ID 609873, 11 pages. doi:10.1155/2014/609873
  21. J.A. Conejero, F. Ródenas, and M. Trujillo. Chaos for the hyperbolic bioheat equation. Discrete Contin. Dyn. Syst. Ser. A 35, No.2, 653-668 (2015). doi:10.3934/dcds.2015.35.653
  22. J.A. Conejero, C. Lizama, and F. Ródenas. Chaotic behaviour of the solutions of the Moore-Gibson-Thompson equation. Appl. Math. Inf. Sci. 9, No. 5, 2233-2238 (2015). doi:10.12785/amis/090503
  23. F. Bastin, J.A. Conejero, C. Esser and J.B. Seoane-Sepúlveda, Algebrability and nowhere Gevrey differentiability. Israel Math. Journal, 125, 127-143 (2015). doi:10.1007/s11856-014-1104-1
  24. J.A. Conejero, G.A. Fernández-Muñoz, M. Murillo-Arcila, and J.B. Seoane-Sepúlveda. Smooth functions with uncountably many zeros. Bull. Belg. Math. Soc. Simon-Stevin., 22, 1-5 (2015).
  25. X. Barrachina, J.A. Conejero, M. Murillo-Arcila, and J.B. Seoane-Sepúlveda. Distributional chaos for the forward and backward control traffic model. Linear Algebra Appl., 479, 202-215 (2015) doi:10.1016/j.laa.2015.04.010
  26. J.A. Conejero, M. Murillo-Arcila, and J.B. Seoane-Sepúlveda. Linear chaos for the Quick-Thinking-Driver model. Semigroup Forum 92 (2016) 486-493. doi:10.1007/s00233-015-9704-6
  27. J.A. Conejero, F. Martínez-Giménez, A. Peris, and F. Ródenas. Chaotic asymptotic behaviour of the solutions of the Lighthill-Whitham-Richards equation. Nonlinear Dyn., 84, 127-143 (2016). doi:10.1007/s11071-015-2245-4
  28. J.A. Conejero, C. Lizama, and F. Ródenas. Dynamics of the solutions of the water hammer equations. Topology Appl., 203, 67-83 (2016) . doi:10.1016/j.topol.2015.12.076
  29. J.A. Conejero, C. Lizama, and M. Murillo-Arcila. On the existence of chaos for the viscous van Wijngaarden-Eringen equationChaos, Solitons & Fractals, 89, 100-104 (2016). doi:10.1016/j.chaos.2015.10.009
  30. J.A. Conejero, M. Kostic, P.J. Miana, and M. Murillo-Arcila. Distributionally chaotic families of operators on Fréchet spaces. Commun. Pure Appl. Anal., 15:5, 1915-1939 (2016). doi:10.1016/cpaa.2016.15
  31. J. Bès, J.A. Conejero, and D. Papathanasiou. Convolution operators and hypercyclic algebras. J. Mat. Anal. Appl., 445:2,  1232–1238 (2017). doi:10.1016/j.jmaa.2016.01.029
  32. J.A. Conejero, J.B. Seoane-Sepúlveda, P. Sevilla Peris. Isomorphic copies of $\ell_1$ for m-homogeneous non-analytic Bohnenblust–Hille polynomials. Math. Nachr., 290:2-3, 218-225 (2017).
  33. J.A. Conejero, C. Lizama, M. Murillo-Arcila, and A. Peris. Linear dynamics of semigroups generated by differential operators. Open Math. 17, 745-767 (2017).  doi:10.1515/math-2017-0065
  34. J.A. Conejero, M. Fenoy, M. Murillo-Arcila, and J.B. Seoane-Sepúlveda. Lineability within Probability Theory settings.  RACSAM Rev. R. Acad. Cienc. Exactas Fís. Nat. Ser. A Mat., 111:1 ,673-684 (2017). doi:10.1007/s13398-016-0318-y
  35. C.C. Chen, J.A. Conejero, M. Kostic, and M. Murillo-Arcila. Dynamics of multivalued linear operators. Open. Math. 15, 948–958 (2017). doi:10.1515/math-2017-0082
  36. J.A. Conejero, C. Lizama, M. Murillo-Arcila. Chaotic semigroups from second order partial differential equations. J. Math. Anal. Appl. 456:1, 402-411 (2017). doi:10.1016/j.jmaa.2017.07.013
  37. J. Bès, J.A. Conejero, and D. Papathanasiou. Hypercyclic algebras for convolution and composition operators. J. Funct. Anal., 274:10, 2884-2905 (2018) doi:10.1016/j.jfa.2018.02.003
  38. L. Bernal-González, J.A. Conejero, M. Murillo-Arcila, J.B. Seoane-Sepúlveda. Highly tempering infinite matrices.RACSAM Rev. R. Acad. Cienc. Exactas Fís. Nat. Ser. A Mat., 112:1 ,341-345 (2018). doi:10.1007/s13398-017-0385-8
  39. C.C. Chen, J.A. Conejero, M. Kostic, M. Murillo-Arcila. Dynamics on binary relations over topological spaces. Symmetry, 10, 211 (2018). doi:10.3390/sym10060211
  40.  L. Bernal-González, J.A. Conejero, G. Costakis, J.B. Seoane-Sepúlveda. Multiplicative structures of hypercyclic functions for convolution operators. J. Oper. Th. 80:1, 101-112 (2018). doi: 10.7900/jot.2017sep27.2162
  41. C. Rodero-Gómez, J.A. Conejero, and I. García-Fernández. Shock wave formation in compliant arteries. Evol. Eq. and Control Th. 8:1, 221-230 (2019). doi:10.3934/eect.2019012
  42. J.A. Conejero, C. Lizama, M. Murillo-Arcila, and J.B. Seoane-Sepúlveda. Well posedness for abstract degenerate third order equations with infinite delay. Israel Math. J. 229:1, 219-254 (2019). doi:10.1007/s11856-018-1796-8
  43. J.A. Conejero, A. Mudayadan, J.B. Seoane-Sepúlveda. Dynamics of multidimensional Cesàro operators. Bull. Belg. Math. Soc. – Simon Stevin, 26, 1-10 (2019). Link
  44. L. Bernal-González, J.A. Conejero, M. Murillo-Arcila, J.B. Seoane-Sepúlveda. [S]-Linear and convex structures in function families. Linear Algebra Appl. 579, 463-48 (2019).  doi:10.1016/j.laa.2019.07.003
  45. J.A. Conejero, A. Mira-Iglesias, C. Lizama, C. Rodero-Gómez. Visibility graphs of Wu-Baleanu time series. To appear in J. Differ. Eq. Appl.

MATHEMATICS IN COMPUTER SCIENCE

Basically, I have collaborated in several works in different areas: computer vision and image processing, modelling of logistic problems related with transport in the new economy, and message dissemination on communication networks.

  1. J.A. Conejero, C. Jordán, and E. Sanabria-Codesal. An iterative algorithm for the management of an electric car-rental service. J. Appl. Math. 2014, 2014, article ID 483734, 11 pages. doi:10.1155/2014/483734
  2. J.A. Conejero, C. Jordán, E. Sanabria-Codesal. A tree-based model for setting optimal train fare zones. Math. Probl. Eng. 2014, 2014, article ID 384321, 11 pages. doi:10.1155/2014/384321
  3. J.A. Conejero, C. Jordán, and E. Sanabria-Codesal. An algorithm for self-organization of driverless vehicles of a car-rental serviceNonlinear Dyn. 84, 107-114 2016. doi:10.1007/s11071-015-2237-4
  4. E. Hernández-Orallo, M. Murillo-Arcila, C.T. Calafate, J.C. Cano, J.A. Conejero, P. Manzoni. Analytical evaluation of the performance of contact-Based messaging applications. Computer Networks, 111C,  45-54 (2016). doi:10.1016/j.comnet.2016.07.006
  5. C. Jordán, J.A. Gómez, and J.A. Conejero. An analysis of the influence of Graph Theory when preparing for programming contests. Mathematics, 5:1, 8, 2017. doi:10.3390/math5010008
  6. J.A. Pérez-Melián, J.A. Conejero, and C. Ferri. Zipf’s and Benford’s law in Twitter hashtags. Proceedings of the Student Research Workshop at the 15th Conference of the European Chapter of the Association for Computational Linguistics, pages 84–93, Valencia, Spain, April 3-7 2017. Link 978-1-945626-34-0
  7. C. Pérez-Benito, S. Morillas, C. Jordán, J.A. Conejero. Smoothing vs. sharpening of color images – Together or separated. Applied Mathematics Nonlinear Sciences 2:1, 299–316, 2017.  doi:10.21042/AMNS.2017.1.00025
  8. C. Pérez-Benito, C. Jordán, S. Morillas, and J.A. Conejero. A model based on local graphs for colour images and its application for Gaussian noise smoothing. J. Comp. Appl. Math. 330, 955-964, 2018. doi:10.1016/j.cam.2017.05.013
  9. E. Hernández-Orallo, M. Murillo-Arcila, J. C. Cano, C. T. Calafate, J. A. Conejero and P. Manzoni. An analytical model based on population processes to characterize data dissemination in 5G opportunistic networks. IEEE Access, 6, 1603-1615. (2018). doi:0.1109/ACCESS.2017.2779748
  10. J.A. Conejero, E. Hernández-Orallo, P. Manzoni, and M. Murillo-Arcila. A SIR-based model for contact-based messaging applications supported by permanent infrastructure. Discrete Contin. Dyn. Syst. Ser. S, 12, 735-746 (2019). doi:10.3934/dcdss.2019048
  11. C. Pérez-Benito, C. Jordán, S. Morillas, and J.A. Conejero. Graph-based methods for simultaneous smoothing and sharpening of color images. J. Comp. Appl. Math. 350, 380-395 (2019). doi:10.1016/j.cam.2018.10.031 

MATHEMATICS IN ENGINEERING

  1. M.E. Iglesias-Martinez, P. Fdez. de Córdoba, J.A. Antonino-Daviu, and J.A. Conejero. Detection of bar breakages in induction motor via spectral substraction of stray flux signals,XXIIIrd International Conference on Electrical Machines (ICEM’2018) p. 1796-1802, (2018). doi:10.1109/ICELMACH.2018.8507078
  2. M.E. Iglesias-Martinez, P. Fdez. de Córdoba, J.A. Antonino-Daviu, and J.A. Conejero. Rotor fault detection in induction motors based on time-frequency analysis using the bispectrum and the autocovariance of stray flux signals. Energies, 29, 597, (2019). doi:10.3390/en12040597
  3. P. Fernández de Córdoba, J.A. Conejero. Mathematical modelling n energy efficiency problems. ICIAM Intelligencer (International Congress on Industrial and Applied Mathematics 2019, Valencia.
  4. M.E. Iglesias-Martinez, P. Fdez. de Córdoba, J.A. Antonino-Daviu, and J.A. Conejero. Detection of nonadjacent rotor faults in induction motors via spectral subtraction and autocorrelation of stray flux signals. IEEE Trans. Ind. Appl. 55:5, 4585-4594, (2019). doi:10.1109/TIA.2019.2917861
  5. M.E. Iglesias-Martinez, P. Fdez. de Córdoba, J.A. Antonino-Daviu, and J.A. Conejero. Higher order spectral analysis of stray flux signals for faults detection in induction motors. Applied Mathematics Nonlinear Sciences. To appear.
  6. D. Alarcón, Eduardo Balvís, R. Bendaña, J.A. Conejero,
    P. Fernández de Córdoba, J.L. Higón, J.Mª. Isidro, and H. Michinel. Mathematical modeling and numerical simulation of heat dissipation in LED bulbs. Preprint, 2020.
  7. F. Florez, P. Fernández de Córdoba, J.L. Higón, J.A. Conejero, and J.L. Poza-Luján. A system to monitor and model the thermal isolation of coating compounds applied to closed spaces. Preprint, 2020.

BIOMEDICAL DATA SCIENCE

I have studied different types of problems in which Mathematics and Computer Science can provide better descriptions or predictions of some illnes and disorders such as ADHD, happiness, ageing, and cancer.

  1. A. Mira-Iglesias, J.A. Conejero, and E. Navarro-Pardo. Natural visibility graphs for diagnosing attention deficit hyperactivity disorder (ADHD). Electronic Notes in Discrete Mathematics, 54,337-342 (2016) .
  2. C. Moret-Tatay, L.G. Lemus-Zuñiga, D. Abad Tortosa, D. Gamermann, A. Vázquez-Martínez, E. Navarro-Pardo, J.A. Conejero. Age slowing down in detection and visual discrimination under varying presentation times. Scand. Journal. Psych. 58:4, 304-311 (2017). doi:10.1111/sjop.12372
  3. F.J. Pérez-Benito, P. Villacampa-Fernández, J.A. Conejero, J.M. García-Gómez, and E. Navarro-Pardo. A happiness degree predictor using the conceptual data structure for deep learning architectures. Comput Methods Programs Biomed. 168, 59-68 (2019) doi: 10.1016/j.cmpb.2017.11.004.
  4. E. Navarro-Pardo, L. González-Pozo, P. Villacampa-Fernández, J.A. Conejero. Benefits of a dance group intervention on institutionalized elder people: a Bayesian network approach. Appl. Math. Nonlin. Sci. 3:2, 503-512 (2018). doi:10.2478/AMNS.2018.2.00039
  5. M.E. Iglesias Martínez, J.M. García-Gómez, C. Sáez-Silvestre, P. Fernández-de-Córdoba, and J.A. Conejero. Feature extraction and similarity of movement detection during seep, based on higher order spectra and entropy of the actigraphy signal: results of the Community Health Study Hispanic /Study of Latinos. Sensors 18:12, E4310 (2018) doi: 10.3390/s18124310.
  6. S. Asensio-Cuesta, A. Sánchez-García, J. Alberto Conejero, C. Sáez, A. Rivero-Rodríguez, and Juan M. García-Gómez. Smartphone sensors for monitoring cancer-related quality of life: App, design, EORTC QLQ-30 mapping, and feasibility in healthy subjects.  Int. J. Env. Res & Public Health. 16, 461 (2019). doi:10.3390/ijerph16030461
  7. A. Mira-Iglesias, E. Navarro-Pardo, J.A. Conejero. Power-law distribution of natural visibility graphs from reaction times series. Symmetry 11, 563 (2019). doi:10.3390/sym11040563
  8. F.J. Pérez Benito, C. Sáez, J.A. Conejero, S. Tortajada, B. Valdivieso, J.M. García-Gómez. Temporal variability analysis reveals biases in electronic health records due to hospital process reengineering interventions over seven years. PLoS ONE 14(8): e0220369. doi:10.1371/ journal.pone.0220369
  9. F.J. Pérez-Benito, J.M. García-Gómez, E. Navarro-Pardo, and J.A. Conejero. Community detection based deep neural network (CD-DNN) architectures: a fully automated framework for Likert scales. Preprint, 2019.

BIOLOGY

In this area I have been working in two lines: Modelling of cyanobacteria and construction of phylogenies from metabolic networks.

  1. D. Gammerman, A. Montagud, J.A. Conejero, J.F. Urchueguía, and P. Fernández de Córdoba. New approach for phylogenetic tree recovery based on genome-scale metabolic networks. J. Comput. Biol. 21 (2014), no. 7, 508-519. doi:10.1089/cmb.2013.0150
  2. D. Fuente, J. Keller, J.A. Conejero, M. Rögner, S. Rexroth, and J.F. Urchueguía. Light distribution and spectral composition within cultures of micro-algae: Quantitative modelling of the light field in photobioreactors. Algal Research, 23, 266-177 (2017).
  3. D. Fuente, C. Lizama, J.F. Urchueguía, and J.A. Conejero. Estimation of the light field inside photosynthetic microorganism cultures through Mittag-Leffler functions at depleted light conditions. J. Quant. Spectrosc. Radiat. Transfer, 204, 23-26 (2018).  doi:10.1016/j.jqsrt.2017.08.012
  4. P. Linbald et al. CyanoFactory, a European consortium to develop technologies needed to advance cyanobacteria as photoautotrophic production chassis. Algal Res. 41,101510 (2019). doi:10.1016/j.algal.2019.101510
  5. D. Gammerman, A. Montagud, J.A. Conejero, J.F. Urchueguía, and P. Fernández de Córdoba. Large scale evaluation of differences between network-based and pairwise sequence-alignment-based methods of dendrogram reconstruction. PLoS ONE 14(9): e0221631. doi:10.1371/journal.pone.0221631

HIGHER EDUCATION (MENTORING & OUTREACH ACTIVITIES)

  1. X. Barrachina, J.A. Conejero, and E. García-Félix. A freshmen mentoring program at the Universitat Politècnica de València. Journal of Industrial Engineering and Management 4(1), 146-162, 2011. doi: 10.3926/jiem.2011.v4n1.p146-162
  2. E. García-Félix, J.A. Conejero, and J.L. Díez. La entrada en la Universidad: un reto para la orientación académica. Revista de Docencia Universitaria 12(2), 255-280, 2014. Link
  3. J.A. Conejero, J.P. García-Sabater, J. Maheut, and J.A. Marín-García. The Praktikum UPV Campus: Stretching closer ties between research at the university and students in secondary school. Working Papers in Operations Management  6(2), 64-75, 2014. doi:10.4995/wpom.v6i2.4199
  4. C. Bachiller and J.A. Conejero. Telecochips: Promoviendo la Ingeniería en Telecomunicación entre los jóvenes estudiantes. IEEE VAEP-RITA 3:2, 68-75, 2015. Link
  5. C. Bachiller and J.A. Conejero. Telecochips: Promoting Telecommunications and Electronic Engineering among young students. IEEE Revista Iberoamericana de Tecnologías del Aprendizaje, 11:2, 63-70, 2016. doi:10.1109/RITA.2016.2553998
  6. L. Gumaelius, M. Almqvist, A. Árnadóttir, A. Axelsson, J. A. Conejero et al. Outreach initiatives operated by universities for increasing interest in science and technology. European Journal of Engineering Education, 41:6, 589-622, 2016. doi:10.1080/03043797.2015.1121468