Referee of the Multidisciplinary Digital Publishing Institute (MDPI) (2021-2024).

Preface of the Handbook of Research on Smart Technology Models for Business and Industry, Edit. Igi-Global, EEUU, 2020, ISBN13: 9781799836452 | ISBN10: 1799836452 | ISBN13: 9781799836469 | DOI: 10.4018 / 978-1-7998-3645-2.

Foreword writer of the “Handbook of Research on Energy-Saving Technologies for Environmentally-Friendly Agricultural Development”, by Valeriy Kharchenko (Federal Scientific Agroengineering Center VIM, Russia) and Pandian Vasant (Universiti Teknologi Petronas, Malaysia) Editors, Editorial Igi-Global, ISBN13: 9781522594208, ISBN10: 1522594205, EISBN13: 9781522594215, DOI: 10.4018 / 978-1-5225-9420, (2019)

Foreword writer of the “Handbook of Research Advancements in Smart Technology, Optimization, and Renewable Energy”, by Pandian Vasant (Universiti Teknologi PETRONAS, Malaysia), Gerhard Weber (Poznan University of Technology, Poland), Wonsiri Punurai (Mahidol University, Thailand) and Igor Litvinchev (Nuevo Leon State University, Mexico) Editors, Editorial Igi-Global, ISBN13: 9781799839705|ISBN10: 1799839702|EISBN13: 9781799839712|DOI: 10.4018/978-1-7998-3970-5, (2020).

Referee of the Journal Concurrency and Computation: Practice and Experience. Wiley Editing Services.

Double-blind contributor to the Mexican Journal of Economics and Finance (REMEF) The Mexican Journal of Economics and Finance, 2019.

Guest Editor of the Journal of the Operations Research Society of China, Elsevier.

Secretary of the Science and Technology Commission of the Southern Center of the National Association of Universities and Institutions of Higher Education, Mexico ANUIES. (November 2018).

Guest Editor of IEEE Transactions on Fuzzy Systems Special Issue Smart Fuzzy Optimization in Operational Research and Renewable Energy: Modelling, Simulation, and Applications, November 2018.

Keynote Speaker of the First International Conference on Intelligent Computing and Optimization (ICO-2018), Pattaya Thailand, October 2018.

Member of the Editorial Committee of the Academic Journal of Engineering Sciences (AJES), Irish Publisher, USA, (2018).

Evaluator in the National Council of Science and Technology, Deputy Directorate of Postgraduate and Scholarships through the Postgraduate Direction of the 2017 Convocation - Renewal of the National Graduate Program of Quality (PNPC), School Mode, Medical Specialties, Postgraduate Studies with Industry and Distance, (2017).

Evaluator of the Stimulus Program for Research, Technological Development and Innovation (PEI), National Council of Science and Technology, Call (2017).

National Researcher Level 1 issued by the National System of Researchers of the National Council of Science and Technology, Mexico, period 2017-2020.

National Researcher Level 2 issued by the National System of Researchers of the National Council of Science and Technology, Mexico, period 2021-2024.

Member of the International Advisory Council of the International Journal of Energy Optimization and Engineering (IJEOE) (2016).

Evaluator PNPC of the National Council of Science and Technology, Mexico, period August-December (2014-2017).

Editorial Board member IGI-Global for the publication of the book “Applied Optimization Methodologies in Manufacturing Systems, (2016).

Adviser of the Program Scholars Abroad of the National Council of Science and Technology, Mexico, period (2014-2016).

Director of the National Council of Science and Technology Research Project number 221,707 "Enlightened self-sustaining spaces, making aluminum alloy from recycled materials for use in applications." Company: Maquinados e Inyecciones Tecámac S.A. de C.V., (2015-2016).

Journal reviewer of Journals & Conferences WSEAS (World Scientific and Engineering Academy and Society), del 14th International Conference on Software Engineering, Parallel and Distributed Systems & Conferences, England (2015).

Journal reviewer of the IGI GLOBAL editorial, (2015-2020).

Journal reviewer of the Journal Engineering Applications of Artificial Intelligence, The International Journal of Intelligent Real-Time Automation. A journal of IFAC, the International Federation of Automatic Control. ELSEVIER. (2015)

Evaluator of research projects in basic science of the Council of Science and Technology (2014), call CB-2013-01.

National Researcher Level 1 issued by the National Research Council of Science and Technology, Mexico, (2014-2017).

Director of the Center for Advanced Research and Applied Technology, Superior School of Apan, Autonomous University of Hidalgo State, Mexico, (2013-2017).

Director of Research, Innovation and Development Research Division, Universidad Autónoma del Estado de Hidalgo, Mexico. (2017 -2020)

Member of the Editorial Committee of the refereed journal "Applied Mathematics and Computer Science" Ed. Mili. India, (2009-2014).

27. Member of the National Network of Mathematics and Computer Modeling of the Research Council of Science and Technology, Mexico, (2011-2014).

Advisor to the National Quality Graduate Program (PNPC) of the Research Council of Science and Technology, Mexico, (2011).

Advisor to the National Quality Graduate Program (PNPC) of the Research Council of Science and Technology, Mexico (2010).

Advisor of the Program Advisory Scholars Abroad of the Research Council of Science and Technology, Mexico, (2010).

Advisor of the Program Advisory Scholars Abroad of the Research Council of Science and Technology, Mexico, (2010).

Advisor of the Program Advisory Scholars Abroad of the Research Council of Science and Technology, Mexico, (2011).

National Researcher Level 1 issued by the National Research Council of Science and Technology, Mexico, 2010-2012.

Member of the National Research Council of Science and Technology accredited assessors (RCEA) area 7 “Engineering and Industry”, register number RCEA-07-20048-2009-2012, Mexico 2012.

President of the Mexican Academy of Science Systems, Region Centro, 2009-2010., Centre region, period (2009-2010).

Member of the Evaluation Committee SEP-ANUIES (1995), Mexico.

SESIC recognition as a research professor profile PROMEP, period (2000, 2006), Mexico.

SESIC recognition as a research professor profile PROMEP, period (2006, 2009), Mexico.

SESIC recognition as a research professor profile PROMEP, period (2009, 2012), Mexico.

SESIC recognition as a research professor profile PROMEP, period (2012, 2015), Mexico.

SESIC recognition as a research professor profile PROMEP, period (2016-2019), Mexico.

Reviewer and referee of the journal World Scientific and Academy Society (WSEAS), period (2005-2008).

Reviewer and referee of the journal World Scientific and Academy Society (WSEAS), (2009).

Member of the Evaluation Committee SEP-ANUIES, Mexico, (1998).

Member of the Arbitration Committee of the Academy Journals, St. Mary's University, San Antonio, Texas, USA.

Member of the International Scientific Committee of the 8th International Conference on Mathematics Applied, 8th Maths. WSEAS, Canary Iceland’s Spain (2008).

Member of the International Scientific Committee of the 2nd International Conference on Computational Chemistry, 8th Compuchem-08 WSEAS, Canary Islands, Spain. (2008).

Member of the International Scientific Committee of the 7th International Conference on Circuits and Systems, Electronics and Signal Processing (Scecs-08) - WSEAS, Canary Islands, Spain.(2008).

(INFORMS)

Member of the Institute for Operations Research and the Management Sciences

(BS/INMSC)

Member of the Bernoulli Society for Mathematical Statistics and Probability

(AMS)

Member of the American Mathematical Society

(SMM)

Member of the Mexican Mathematical Society

(SIAM)

Member of the Society for Industrial and Applied Mathematics

An alternative approach to solving integer and mixed integer programming models using quasi-gradient techniques

Gilberto Pérez-Lechuga, Karla N. Madrid-Fernández, Jaime Mora-Vargas, Marco A. Montufar-Benítez, to appear in Mathematics MDPI, March 2024.

Memory persistence in cryptocurrencies: Analysis based on Hurst- Exponent and LSTM Brownian diffusion network application

Francisco Javier Martínez-Farías, José Francisco Martínez-Sanchez, Pablo Antonio López-Pérez, Gilberto Pérez-Lechuga, for appearing in Financial Innovation Springer, Abril (2024).

A simulation model to analyze the behavior of a faculty retirement plan: a case study in Mexico

Marco Antonio Montufar-Benítez, Jaime Mora- Vargas, Carlos Arturo Soto-Campos, Gilberto Pérez-Lechuga & José Raúl Castro-Esparza, (Febrero 2024).

A Routing Model for the Distribution of Perishable Food in a Green Cold Chain

Gilberto Pérez-Lechuga, José Francisco Martínez-Sánchez, Francisco Venegas-Martínez, Karla Nataly Madrid-Fernández, (2024).

A glance at trends manufacturing systems modeling and optimization

Gilberto Pérez-Lechuga, José Francisco Martínez-Sánchez, Tomás Gómez-Rodríguez, (2023).

Advances of Artificial Intelligence in a Green Energy Environment

Gilberto Pérez Lechuga and Ugo Fiore, Hybrid optimization and artificial intelligence applied to energy systems: a review, Chapter 14 of the book “Advances of Artificial Intelligence in a Green Energy Environment, 1st Edition - May 20, 2022, Editors: Pandian Vasant, Joshua Thomas, Elias Munapo, Gerhard-Wilhelm Weber, Paperback ISBN: 9780323897853, eBook ISBN: 9780323885744. Elsevier Academic Press.

On the Dynamics in Decoupling Buffers in Mass Manufacturing Lines: A Stochastic Approach

by Gilberto Pérez-Lechuga, Francisco Venegas-Martínez,Marco A. Montufar-Benítez and Jaime Mora-Vargas, Mathematics MDPI 2022, 10(10), 1686. (14 May 2022).

Money laundering risk management in multiple-purpose financial institutions in Mexico: a Bayesian network approach

Martínez-Sánchez, J.F., Venegas-Martínez, F. and Pérez-Lechuga, G. (2022), "Money laundering risk management in multiple-purpose financial institutions in Mexico: a Bayesian network approach", Journal of Money Laundering Control, Vol. ahead-of-print No. ahead-of-print.

Mathematical Modeling of Manufacturing Lines with Distribution by Process: A Markov Chain Approach

Pérez-Lechuga Gilberto, Venegas-Martínez,Francisco and Martínez-Sánchez José Francisco, Mathematical Modeling of Manufacturing Lines with Distribution by Process: A Markov Chain Approach, Mathematics, VOLUME 9, (2021). No. 24.

CFD Analysis of an Ejector Operating in an Experimental Cooling System

CFD Analysis of an Ejector Operating in an Experimental Cooling System, Raúl Román Aguilar, Julio Valle Hernández, Gilberto Pérez Lechuga and Jorge I. Hernández Gutiérrez, IJMMM 2020 Vol.8(1): 1-4 ISSN: 1793-8198, DOI: 10.18178/ijmmm.2020.8.1.474, (2020).

Risk assessment methodology for money laundering (PLD) prevention and terrorist financing (FT)

Risk assessment methodology for money laundering (PLD) prevention and terrorist financing (FT). Francisco Martínez Sánchez, Gilberto Pérez Lechuga, Arturo Martínez Camacho, Panorama Económico, February 2020, No. 30, Vol.15. ISSN 1870-2171, Mexico. (2020).

Energy Evaluation of a Thermoelectric Cooling System for the Transfer of Vaccines Powered by Solar Energy

Energy Evaluation of a Thermoelectric Cooling System for the Transfer of Vaccines Powered by Solar Energy, Julio Valle Hernández, Raúl Román Aguilar, Gilberto Pérez Lechuga, Berenice Diaz Monroy, Conference: 2019 IEEE 2nd International Conference on Renewable Energy and Power Engineering (REPE), DOI: 10.1109/REPE48501.2019.9025161, (2019).

Convolutional Graph Neural Networks, A Review and Applications of Graph Autoencoder in Chemoinformatics: Graph Neural Network Models

Convolutional Graph Neural Networks, A Review and Applications of Graph Autoencoder in Chemoinformatics: Graph Neural Network Models, Joshua Thomas J, Gilberto Pérez Lechuga, chapter 7 of the book “Deep Learning Techniques and Optimization Strategies in Big Data Analytics”, Igi- Global Editorial, (2019).

Modern methods of optimization in models of hydrothermal coordination and emission of contaminating particles in power generating plants

Modern methods of optimization in models of hydrothermal coordination and emission of contaminating particles in power generating plants, Gilberto Pérez Lechuga, Ugo Fiore, chapter 15 of the handbook, "Smart Computing and Innovative Optimization for Renewable Energy and Agro-Engineering”, IGI Global, Editorial Discovery, (2019).

A model for planning the sowing of agricultural crops and raising animals through two-stage mathematical programming

A model for planning the sowing of agricultural crops and raising animals through two-stage mathematical programming, Gilberto Pérez Lechuga, Otilio A. Acevedo Sandoval, Karla, N. Madrid Fernández, Raúl Román Aguilar, chapter 16 of the hand book, "Smart Computing and Innovative Optimization for Renewable Energy and Agro-Engineering, IGI Global, Editorial Discovery, https://www.igi-global.com/publish/call-for-papers/call-details/3646, (2019).

A model for the location and scheduling of the operation of second-generation ethanol biorefineries

A model for the location and scheduling of the operation of second-generation ethanol biorefineries, Gilberto Pérez Lechuga, Silvia L. Aguilar Velázquez, Miguel A. Cisneros López, Francisco Venegas Martínez, Journal of Mathematics in Industry, Springer, 2019, 9:3 (2019).

An interdisciplinary review of smart vehicular traffic and its applications and challenges

An interdisciplinary review of smart vehicular traffic and its applications and challenges, Ugo Fiore, Adrian Florea, Gilberto Pérez Lechuga, J. Sens. Actuator Netw. 2019, 8(1), 13. (2019).

Differences by gender in the marginal rate of return to undergraduate and graduate studies in Mexico

Differences by gender in the marginal rate of return to undergraduate and graduate studies in Mexico, Marco Antonio Austria Carlos, Francisco Venegas Martínez, Gilberto Pérez Lechuga, Papeles de Población, Universidad Nacional Autónoma del Estado de México, E-ISSN 2448-7147, August, (2018).

Optimal logistics strategy to distribute medicines in clinics and hospitals 1. Optimal logistics strategy to distribute medicines in clinics and hospitals

Optimal logistics strategy to distribute medicines in clinics and hospitals, Gilberto Pérez Lechuga, Journal of Mathematics in Industry, Springer, ISSN 2190-5983, pp 1-18, 8:2, (2018).

Design and application of a quantitative forecast model for determination of the properties of aluminum alloys used in die casting

Design and application of a quantitative forecast model for determination of the properties of aluminum alloys used in die casting, C. A Muñoz, M. Alfaro-Ponce, G. Pérez Lechuga, y J.A. Pescador-Rojas, International Journal of Metalcasting,Springer, ISSN: 1939-5981, 2163-3193, mayo (2018), pp: 1-14.

Impact of the stock market capitalization and the banking spread in growth and development in Latin American: A panel data estimation with System GMM

Impact of the stock market capitalization and the banking spread in growth and development in Latin American: A panel data estimation with System GMM, Ali Aali-Bujari, Francisco Venegas Martínez, Gilberto Pérez Lechuga, Contaduría y Administración 62(2017) 1427-1441, (2017).

Evaluation of a credit scoring system for popular savings institutions and credit

Evaluation of a credit scoring system for popular savings institutions and credit, José Francisco Martínez Sánchez, Gilberto Pérez Lechuga, Contaduría y Administración, Volume 61, Issue 2, Pages 391–417, (April–June 2016).

Impact of derivatives markets on economic growth in some major economies in the world: a difference-GMM panel data estimation

Impact of derivatives markets on economic growth in some major economies in the world: a difference-GMM panel data estimation., Aali-Bujari, A. Venegas-Martínez, Francisco, Gilberto Pérez Lechuga, G. (2002-2014). AESTIMATIO, THE IEB INTERNATIONAL JOURNAL OF FINANCE, 2016. 12: 110-127. DOI: 10.56.05/IEB.12.6

Technological innovation in economic thought

Technological innovation in economic thought. Ali Aali Bujari, Gilberto Pérez Lechuga y Ruth Ortiz Zarco. Journal Administration & Finances, Vol.2 No.5 925-941, ISSN 2410-342X., (December 2015).

Manufacturing logistics and supply chain: relations and economic importance

Manufacturing logistics and supply chain: relations and economic importance, Gilberto Pérez Lechuga, Cristopher A. Muñoz Ibáñez, Francisco Venegas Martínez, International Journal of Pure and Applied Mathematics, ISSN: 1311-8080 (printed version); ISSN: 1314-3395 (version on line), volume 105, No. 3 2015, 477-496, (October de 2015).

Assessment of market efficiency aluminum using Random Walk

Assessment of market efficiency aluminum using Random Walk. C. Muñoz Ibáñez, G. Pérez Lechuga, F. Venegas Martínez., International Journal of Pure and Applied Mathematics, ISSN 1311-8080, ISSN ISSN 1314-3395, Vol. 97, No. 4., (December 2014).

Impact of market capitalization and banking spread in growth and development in Latin America: An estimation of panel data GMM system

Impact of market capitalization and banking spread in growth and development in Latin America: An estimation of panel data GMM system. Aali-Bujari, Alí and Venegas-Martínez, Francisco and Gilberto Pérez Lechuga, (2014).

Sensitivity analysis of the problem of replacement, Intelligent Control and Automation

Sensitivity analysis of the problem of replacement, Intelligent Control and Automation, Vol.5 No.2, May 8, 2014, Eva Selene Hernández Gress, Gilberto Pérez Lechuga, Neil Hernández Gress. Published Online, May 2014 in SciRes.

Innovative design of a micro pump: Applications to microfluidics

Innovative design of a micro pump: Applications to microfluidics, Ciro F. Flores Rivera, Gilberto Pérez Lechuga, Pablo Nuño de la Parra. Proceedings of CERMA (2012) in electronics, robotics and automotive mechanics, IEEE.

Innovative design of a micro pump: Navier-Stokes equations convection and diffusion

Innovative design of a micro pump: Navier-Stokes equations convection and diffusion, Ciro F. Flores Rivera, Gilberto Pérez Lechuga, Pablo Nuño de la Parra. Proceedings of CERMA (2012) in electronics, robotics and automotive mechanics, 978-0-7695-4563-9/11, IEEE, DOI 10.1109/CERMA.2011.39

Obtaining the short term optimal scheduling of a hydro-thermal power generation system: A stochastic perspective

Obtaining the short term optimal scheduling of a hydro-thermal power generation system: A stochastic perspective, G.E. Mora Cárdenas, G. Pérez-Lechuga, J.C. Tuoh Mora and J. Medina Marín. In Applied Mathematics and Computer Science, ISSN 0976-1586, Vol. 3, Issue 4, May 2012, 361, 379.

A multi-period stochastic model to link the supply chain production planning in a manufacturing organization

A multi-period stochastic model to link the supply chain production planning in a manufacturing organization, G. Pérez-Lechuga, C.F. Flores-Rivera, A. A. Karelyn, A. Tarasenko. In Advances in science and statistics applications, Volume 6, Issue 4, July 2011, ISSN 0974-6811, pp 255-283, © 2011 Mili Publications, (december 2011).

Some measures of efficiency in operations flexible manufacturing systems. A stochastic approach

Some measures of efficiency in operations flexible manufacturing systems. A stochastic approach, Gilberto Pérez Lechuga, E.S.H. Gress, A.A. Karelyn, M.G.M. Orán. Monographs of SIAM, Mathematics and Industry, (April 2010).

Modelling systems with renewable resources based on functional operators with shift

Modelling systems with renewable resources based on functional operators with shift, (June 2010), 216 (7), pg. 1938-1944, : ISSN 0096-3003, Anna Tarasenko; Aleksandr Karelin; Gilberto Pérez Lechuga; Manuel González Hernández.

On explicit inversion of a subclass of operators with D-difference kernels and Weyl theory of the corresponding canonical systems

On explicit inversion of a subclass of operators with D-difference kernels and Weyl theory of the corresponding canonical systems, Alexander Sakhnovich, Alexander Karelyn, J. Seck Tuoh Mora, Gilberto Pérez Lechuga, Manuel González Hernández., POSITIVITY DOI 10.1007/s11117-009-0036-1. Nov 2009, pp. 547-564, Volume 14, Number 3, 547-564, DOI: 10.1007/s11117-009-0036-

Riemann problem and singular integral equations with coefficients generated by piecewise constant functions and A.A. Tarasenko

Riemann problem and singular integral equations with coefficients generated by piecewise constant functions and A.A. Tarasenko. In Russian Mathematics, Vol. 52. No. 2, ISSN 1066-369X, DOI 10.1007/s11982-008-2011-8, N.Y. 2008, pp. 71-74. (English Translation of Izvestiya Vysshikh Uchebnykh pp. 73-76) Allerton Press, Inc. distributed exclusively by Springer Science+Business Media LLC, NY. (February 2008).

Riemann problem and singular integral equations with coefficients generated by piecewise constant functions

Riemann problem and singular integral equations with coefficients generated by piecewise constant functions, A. A. Karelyn, G. Pérez Lechuga, Anna Tarasenko., In Differential Equations, Vol 44, No. 9, ISSN 0012-2661, pp 1225-1235, Pleiades Publishing, Ltd. (English Translation of Differentsial’nye Uravneiya, 2008, Vol. 44, No 9, pp. 1182-1192), (October 2008).

Linear stochastic programming to optimize some stochastic systems

Linear stochastic programming to optimize some stochastic systems, Gilberto Pérez Lechuga, M. Álvarez Suárez, J. Garnica González, H. Niccolas Morales, F. Venegas Martínez. in: WSEAS Transactions on Systems, Issue 9, Vol. 5, ISSN 1109-2777, (Sept. 2006).

Stochastic analysis decoupling operations in flexible manufacturing systems

Stochastic analysis decoupling operations in flexible manufacturing systems, Gilberto Pérez Lechuga, A. O Karelyn, M. Muñóz Orán, Miguel Plá Aragones. In WSEAS Transactions on Systems, Issue 11, Vol. 4, ISSN 1109-9277, (November de 2005).

On the efficiency of random search methods

On the efficiency of random search methods, Gilberto Pérez Lechuga, Juan Carlos Seck Tuoh Mora, E. Morales Sánchez, M.M. Álvarez Suárez. In WSEAS Transactions on Business and Economics, Issue 2, Vol. 2, ISSN 1109-9526, (April 2005).

Structural equation modeling: Goodness of fit and quality of alternative models

Structural equation modeling: Goodness of fit and quality of alternative models, M.M. Álvarez Suárez, Gilberto Pérez Lechuga, Jorge Rojas Ramírez. In WSEAS Transactions on Business and Economics, Issue 2, Vol. 2, ISSN 1109-9526, (April 2005).

Application of functional equations with shift systems modeling with recoverable resources, (In Russian)

Application of functional equations with shift systems modeling with recoverable resources, (In Russian). A.A. Karelyn & Gilberto Pérez Lechuga, Proceedings of the Institute of Mathematics, (Trudi Instituta Matematiki), National Academy of Sciences of Belarus, Minsk. Vol. 12, NO. 2, pp. 72-75, 2004, (November 2004).

An Algorithm for Analyzing the Transitive Behavior of Reversible One-Dimensional Cellular Automata with Both Welch Indices Different

An Algorithm for Analyzing the Transitive Behavior of Reversible One-Dimensional Cellular Automata with Both Welch Indices Different, Juan Carlos Seck Tuoh Mora, Manuel González Hernández, Gilberto Pérez Lechuga, In International Journal of Unconventional Computing, 2005. Vol. 1. No. 2 2005. pp. 161-177, (May 2004).

An approximation to estimating production line manufacturing CONWIP controlled as a function of maintenance

An approximation to estimating production line manufacturing CONWIP controlled as a function of maintenance, Gilberto Pérez Lechuga, Miriam M. Álvarez Suárez, Luis Miguel Plá Aragones, Morayma G. Muñoz Orán, WSEAS Transactions on Systems, Issue 3, Volume 3, May 2004. ISSN 1109-2777. Miami. Fla. (May 2004).

Priori information in stochastic optimization: quasi gradients Methods

Priori information in stochastic optimization: quasi gradients Methods, Gilberto Pérez Lechuga, Mexican Journal of Economy and Finance, (REMEF), Vol. 2. No. 2, June 2003, ISSN 1665-5346, pp. 175-192. (2003).

A Stochastic Optimization Algorithm by Searching with a Priori Information Incorporation

A Stochastic Optimization Algorithm by Searching with a Priori Information Incorporation, Gilberto Pérez Lechuga, Omar López Ortega, Journal EPIO, No. 22, Argentina, (March 2002).

Energy valuation of a thermoelectric cooling system for the transfer of vaccines powered by solar energy

Energy valuation of a thermoelectric cooling system for the transfer of vaccines powered by solar energy, Julio Valle Hernández, Raúl Román Aguilar, Gilberto Pérez Lechuga, Berenice Diaz Monroy, Britania Lozano Olmedo, Proceedings of 2019 IEEE 2nd International Conference on Renewable Energy and Power Engineering, November 2-4, Toronto Canada. (2019).

Modeling and optimization of flexible manufacturing systems: A stochastic approach

Modeling and optimization of flexible manufacturing systems: A stochastic approach, Gilberto Pérez Lechuga, Francisco Martínez Sánchez, Springer Proceedings of 1st International Conference on Intelligent Computing & Optimization, ICO2018, October 4 - 5, 2018, Pattaya, Thailand, (2018).

Innovative design and modeling of a micro pump: An application to microfluidics

Innovative design and modeling of a micro pump: An application to microfluidics, Ciro F. Flores Rivera, Gilberto Pérez Lechuga, Pablo Nuño de la Parra. Proceedings of the Electronics, Robotics and Automotive Mechanics Conference, CERMA. (2012).

Innovative design and modeling of a micro pump: convection-diffusion equations

Innovative design and modeling of a micro pump: convection-diffusion equations, Ciro F. Flores Rivera, Gilberto Pérez Lechuga, Proceedings of the Electronics, Robotics and Automotive Mechanics Conference, 978-0-7695-4563-9/11, IEEE, DOI 10.1109/CERMA.2011.39.

Analysis of the ability to plant on a dairy company using Monte Carlo Simulation

Analysis of the ability to plant on a dairy company using Monte Carlo Simulation, Joselito Medina-Marín, Gilberto Pérez-Lechuga, Juan Carlos Seck-Tuoh Mora, Norberto Hernández Romero, Isaías Simón-Marmolejo. EMSS 2011: Proceedings of the 23rd European Modeling & Simulation Symposium, Rome, Italy, pp 12-14, (September 2011).

The stochastic programming problem short-term production of hydro-thermal plant

The stochastic programming problem short-term production of hydro-thermal plant, Gilberto Pérez Lechuga, Joselito Medina Marín, Juan Carlos Seck Tuoh Mora, G.E. Mora Cárdenas, Proceedings of the 15th Annual Conference on Industrial Engineering Theory and Practice Applications, Mexico City, October 17-20, (2010).

Some measures of efficiency in the operation of a manufacturing system: A stochastic approach

Some measures of efficiency in the operation of a manufacturing system: A stochastic approach, Gilberto Pérez Lechuga, E.S.H. Gress, A.A. Karelyn, M.G.M. Orán. Monographs of the Society for Industrial and Applied Mathematics, (SIAM): Changes and borders (MI-09), Sn. Francisco, Cal. (October de 2009).

Modeling and sensitivity analysis of the replacement problem: A Stochastic approach

Modeling and sensitivity analysis of the replacement problem: A Stochastic approach, Gilberto Pérez Lechuga, E.S.H. Gress, A.A. Karelyn, M.G.M. Orán. Proceedings of the Institute for Operations Research and the Management Sciences (ORMS), Annual Meeting 2009, Sn. Diego California, (October 2009).

Analysis of disturbance in the stationary distribution of a Markov chain

Analysis of disturbance in the stationary distribution of a Markov chain, Gilberto Pérez Lechuga, Luis Miguel Plá Aragonés., Proceedings of the 22nd European Conference on Operations Research. 8 -13 July 2007, Prague, Czech Republic.

Analysis of disturbance in the stationary distribution of a Markov chain

Analysis of disturbance in the stationary distribution of a Markov chain, Gilberto Pérez Lechuga, Pablo J. García González, Héctor Rivera Gómez. In: Selected Topics in Circuits, Systems and Electronic Processing of the International Conference on Advances in Applied Mathematics, ISBN 978-960-6766-28-2, ISSN: 1790, 5117, El Cairo Egypt, pp-103-109, (December 2007).

A systemic model of two renewable resources regularly periods

A systemic model of two renewable resources regularly periods, Gilberto Pérez Lechuga, Manuel González Hernández, Anna Tarasenko. Proceedings of the IX International Symposium "Contributions of Universities for Teaching, Research, Technology and Development", National Polytechnic Institute, Mexico, (2007).

Stochastic optimization of a Markov decision process representing a sow farm

Stochastic optimization of a Markov decision process representing a sow farm, Gilberto Pérez Lechuga, Luis Miguel Plá Aragonés, Proceedings of the Latin American Congress on Operations Research, CLAIO 2006, Montevideo, Uruguay, (2006).

On the invariance of singular integro operators, A. Karelyn

On the invariance of singular integro operators, A. Karelyn, Gilberto Pérez Lechuga, Memories of AMADE-2006, Vol. 1, ISBN 985-6499-35-6, 2006. Minsk. Institute of Mathematics of the National Academy of Sciences Belarus, (2006).

Analysis and observations of a systemic model of renewable resources

Analysis and observations of a systemic model of renewable resources, A. Karelin, Gilberto Pérez Lechuga, Manuel González Hernández, Anna Tarasenko. Proceedings of the 2o International Symposium, Contributions of Universities for Teaching, Research, Technology and Development, National Polytechnic Institute, Mexico., (2006).

Modeling of the production cycle of a herd through a Markov chain

Modeling of the production cycle of a herd through a Markov chain, Rivera Gómez H., Pérez Lechuga, G., Proceedings of the VI International Seminar on Systems Engineering (VISIs), Cozumel Quintana Roo, from 15 to 18 November (2006).

Multivariate analysis: classification, organization and validation of results

Multivariate analysis: classification, organization and validation of results, Álvarez Suárez, Miriam M., Caballero, Amaury and Pérez Lechuga G., Proceedings of the Fourth International Conference for Engineering and Technology (LACCET '2006), 21-23 June 2006, Mayaguez, Puerto Rico.

Minimization of a regenerative process Markov

Minimization of a regenerative process Markov, Pérez Lechuga G., Karelyn A.A., Seck Tuoh Mora, en la 49th International Meeting of the Society for Science Systems. Cancun, Mexico, July 5, (2005).

Taxonomic response in the planning of manufacturing systems

Taxonomic response in the planning of manufacturing systems, Rojas-Ramírez, Jorge; López-Cuachayo, Marco A.; Álvarez-Suárez, Miriam; Cruz-Méndez, Miguel A. Pérez-Lechuga, Gilberto. Proceedings of the 49th International Meeting of the Society for Science Systems. Cancun, Mexico, July 5, (2005).

On the efficiency of random search methods

On the efficiency of random search methods, Gilberto Pérez Lechuga, Juan Carlos Seck Tuoh Mora, E. Morales Sánchez, M.M. Álvarez Suárez. Proceedings of the 4Th WSEAS, Conference Internationals of Applied Mathematics in Computational Sciences (AMCOS), Rio de Janeiro, Brazil, April (2005).

System Optimization: ¿A precise or an approximation?

System Optimization: ¿A precise or an approximation? Gilberto Pérez Lechuga, Jaime Garnica González, Heriberto Niccolas Morales, Proceedings of the 8th National Congress of Electromechanical Engineering and Systems, Mexico, D.F., November (2004).

Conceptual model to generate tools for improving the systems involved in the Lay Out of the micro and small enterprises

Conceptual model to generate tools for improving the systems involved in the Lay Out of the micro and small enterprises, Jaime Garnica González, Gilberto Pérez Lechuga, Heriberto Niccolas Morales, Germán Reséndiz López, Proceedings of the 8th National Congress of Electromechanical Engineering and Systems, Mexico, D.F., November (2004).

Measurements of electrical conductivity rice starch, Eduardo Morales Sánchez

Measurements of electrical conductivity rice starch, Eduardo Morales Sánchez, Gilberto Pérez Lechuga, Proceedings of the 8th National Congress of Electromechanical Engineering and Systems, Mexico, D.F., November (2004).

An algorithm for stochastic optimization using Monte Carlo simulation systems

An algorithm for stochastic optimization using Monte Carlo simulation systems, Gilberto Pérez Lechuga, Morayma Georgina Muñoz Oran, Erick Torres Carreño. Proceedings of the XXVI National Congress of the Mexican Mathematical Society, Pachuca Hidalgo, October (2003).

A non-recursive method for random optimization of production planning,

A non-recursive method for random optimization of production planning, Gilberto Pérez Lechuga, Luis I. Martínez Solís, Morayma G. Muñoz Orán, Proceedings, 27th National Congress of Statistics and Operations Research, Lleida, Spain. April (2003). pp.

A Stochastic Optimization Algorithm by Searching with a Priori Information Incorporation

A Stochastic Optimization Algorithm by Searching with a Priori Information Incorporation, Gilberto Pérez Lechuga, Jorge A. Rojas Ramírez, Juan Carlos Seck Tuoh Mora, Proceedings, 27th National Congress of Statistics and Operations Research, Lleida, Spain. April (2003).

Making decisions to address problems of failures in manufacturing systems

Making decisions to address problems of failures in manufacturing systems, Jorge Rojas Ramírez, Gilberto Pérez Lechuga, Eduardo Oliva López, “Memories of the Multi-Conference on Computational Engineering Systems and Applications", CESA 2003 Symposium on Discrete Event Systems Industrial Manufacturing, Lille, France in July (2003).

An approximation to the production of a production process controlled by CONWIP according to their maintenance

An approximation to the production of a production process controlled by CONWIP according to their maintenance, Proceedings of the Second International Conference of Business Administration, and Maintenance Congress II., Gilberto Pérez Lechuga, Sta. Clara, Republic of Cuba, October (2000).

Probabilistic Failure Analysis in High Risk Systems

Probabilistic Failure Analysis in High Risk Systems. Gilberto Pérez Lechuga, Proceedings of the First Peruvian Congress of Maintenance Engineering and Reliability. May (2001).

An EXPRESS Meta Model for Sharing and Exchanging Flexible Manufacturing Resources Information

An EXPRESS Meta Model for Sharing and Exchanging Flexible Manufacturing Resources Information, Omar López Ortega, Gilberto Pérez Lechuga, World Congress Manufacturing, Rochester Institute of Technology, Rochester, New York, USA. 24 to 27 September (2001).

On the conditions convergence of stochastic programming algorithms and their applications to system optimization

On the conditions convergence of stochastic programming algorithms and their applications to system optimization, Gilberto Pérez Lechuga, Proceedings of the 5th. World Congress of the Bernoulli Society and the Mathematical Statistics, and 63Th. Annual Meeting of the Institute of Mathematical Statistics. (2000).

A simulation model to evaluate the spread of AIDS and its spatial estimation of rates of spread

A simulation model to evaluate the spread of AIDS and its spatial estimation of rates of spread, Gilberto Pérez Lechuga, Miriam Álvarez Suárez, Proceedings XIV Latin Ibero Operations Research and Systems (X CLAIO) Mexico (2000) Congress.

The Normal Distribution: Concept and Most Important Properties

The Normal Distribution: Concept and Most Important Properties, Gilberto Pérez Lechuga, Tiempo Nuestro, UAEH, año 1, No. 2. P 147-170, (1987).

Mathematics, Great Controversial

Mathematics, Great Controversial, Román Hernández Genis, Gilberto Pérez Lechuga, Síntesis newspaper, Friday June 25, (1999).

Simulating a complex dynamic, stochastic and complex system

Simulating a complex dynamic, stochastic and complex system, Gilberto Pérez Lechuga, Proceedings of the International Congress of Mathematics, Physics and Cybernetics COMATT 99, University Camilo Cienfuegos Matanzas Cuba. (1999)

Optimization and simulation of a production system controlled by Kanban

Optimization and simulation of a production system controlled by Kanban, Gilberto Pérez Lechuga, Proceedings of the First International Congress of Industrial Engineering, Colima Col. (1999).

Selecting an Optimal Policy in a Markovian Decision Process in Absence of Priori Information

Selecting an Optimal Policy in a Markovian Decision Process in Absence of Priori Information, Gilberto Pérez Lechuga, Memories of the VII Latin American Congress of Probability and Mathematical Statistics, Córdoba Argentina (1988).

Selecting the best stochastic system stochastic stable using quasi gradients

Selecting the best stochastic system stochastic stable using quasi gradients, Gilberto Pérez Lechuga, Proceedings of the 1st Meeting Ibero-american Latin Optimization And ELIO; 2nd Chilean Congress of OPTIMA Operations Research (1988).

An Analysis on the efficiency and requirements for a random search algorithm optimizer

An Analysis on the efficiency and requirements for a random search algorithm optimizer, Gilberto Pérez Lechuga, Proceedings, CIMAF 97, Havana Cuba. (1997).

A random search algorithm to optimize some queuing models and inventory systems

A random search algorithm to optimize some queuing models and inventory systems, Gilberto Pérez Lechuga, Proceedings of the V Latin American Congress of Probability and Statistics CLAPEM, Sao Paulo Brazil, (1993).

Stochastic random search optimization and its application to the analysis of Markov chains

Stochastic random search optimization and its application to the analysis of Markov chains, Gilberto Pérez Lechuga, internal research report, SRME, UAEH, (1999).

A Computational Model for the Study of the Diffusion of Epidemics

A Computational Model for the Study of the Diffusion of Epidemics, Gilberto Pérez Lechuga, internal research report, SRME, UAEH (1999).

A mathematical perspective for the study of the spread of AIDS

Factorization of a programming model for large-scale production scheduling, Gilberto Pérez Lechuga, internal research report, SRME, UAEH (1999).

A mathematical approach for the dissemination of some infectious diseases: Cold, syphilis and AIDS

A mathematical approach for the dissemination of some infectious diseases: Cold, syphilis and AIDS, Gilberto Pérez Lechuga, internal research report, SRME, UAEH (1999).

An Optimal Feeding and Confinement Plan for Free-Range Animals Using Two- Phase Stochastic Mathematical Programming.

Gilberto Pérez Lechuga, Martínez-Sánchez, J.F., A glance at trends manufacturing systems modeling and optimization, to be appear in the book “Human Agro-Energy Optimization for Business and Industry”, Ed. Igi-Global.

Gilberto Pérez Lechuga, A model for calculating the retirement fund in a pension system: A stochastic approach, to be appear in Mathematics, MDPI

Gilberto Pérez Lechuga, A model for calculating the retirement fund in a pension system: A stochastic approach, to be appear in Mathematics, MDPI, August 2022.

A review of heuristic techniques applied to stochastic optimization in manufacturing systems.

Marco Antonio Montufar-Benítez · Jaime Mora-Vargas · Carlos Arturo Soto-Campos · Gilberto P érez-Lechuga · José Raúl Castro-Esparza, A simulation model to analyze the behavior of a faculty retirement plan. A case Study in Mexico, to be appear in Computational Statistics, Springer.

Brazil

Bayesian Statistics, University of Campinas

Cuba

Superior Institute of Nuclear Science and Technology - ISCTN (Cuba), Engineering reliability in nuclear power plants

Spain Lleida

Visiting Professor, Department of Mathematics, University of Lleida, Spain Lleida

Spain Lleida

Department of Mathematics, University of Lleida Lleida Spain: Visiting, teacher of the course Introduction to stochastic optimization

Germany

Department of Mathematics, University of Ulm, Germany, modeling and stochastic optimization systems

Montreal Canada

University of Montreal, Montreal Canada, Mathematical modeling of supply chains and transport systems

A glance at trends manufacturing systems modeling and optimization

Gilberto Pérez-Lechuga, José Francisco Martínez-Sánchez, Tomás Gómez-Rodríguez, (2023).

Hybrid Optimization and Artificial Intelligence Applied to Energy Systems: A review

Gilberto Pérez Lechuga, Karla N. Madrid Fernández, Hugo Fiore, Hybrid Optimization and Artificial Intelligence Applied to Energy Systems: A review, Chapter 17 of the book Advances of Artificial Intelligence in a Green Energy Environment, Editors: Pandian Vasant, Joshua Thomas, Elias Munapo, Gerhard-Wilhelm Weber, Elsevier, 2022.

AOAMSB 2021 BOOK: Advanced Optimization in Analytics for Managing Sustainable Businesses

AOAMSB 2021 BOOK: Advanced Optimization in Analytics for Managing Sustainable Businesses. Prof. Elias Munapo, NWU - Mafikeng Campus, South Africa. Editors: Dr Gerhard-Wilhelm Weber, Poznan University of Technology, Poland, and METU, Ankara, Dr Pandian Vasant, UniversityTechnology Petronas, Malaysia, Dr. ValeriyKharchenko, Federal Scientific Agro engineering Center VIM, Moscow, Russia, Dr. Gilberto Pérez Lechuga, Autonomous University of The Hidalgo State, Mexico

To be com: Artificial Intelligence in Smart Autonomous, Robotics, and Drone Technology.

To be com: Artificial Intelligence in Smart Autonomous, Robotics, and Drone Technology. Computer Science & Information Management, Apple Academic Press. Technology Volume 1: Introduction / Volume 2: Advances Editors: Dr. J. Joshua Thomas, Dr. Gerhard-Wilhelm Weber, Dr. Ugo Fiore, Dr. Elias Munapo, Dr. Gilberto Perez Lechuga, Dr. Pandian Vasant.

Handbook of Research on Smart Technology Models for Business and Industry

Handbook of Research on Smart Technology Models for Business and Industry, by J. Joshua Thomas (KDU Penang University College, Malaysia), Ugo Fiore (University of Naples Parthenope, Italy), Gilberto Perez Lechuga (Autonomous University of Hidalgo State, Mexico), Valeriy Kharchenko (Azov-Black Sea Engineering Institute of Federal State Budgetary Establishment of Higher Education, Russia) and Pandian Vasant (Universiti Teknologi PETRONAS, Malaysia), Editors, Editorial Igi-Global, 2020. ISBN13: 9781799836452, ISBN10: 1799836452, EISBN13: 9781799836469, DOI: 10.4018/978-1-7998-3645-2, (2020).

Modern Methods of Optimization in Models of Hydrothermal Coordination and Emission of Contaminating Particles in Power Generating Plants

Modern Methods of Optimization in Models of Hydrothermal Coordination and Emission of Contaminating Particles in Power Generating Plants, Gilberto Pérez Lechuga, Ugo Fiore, Francisco Martínez Sánchez, Chapter 15 in the book “Smart Computing and Innovative Optimization for Renewable Energy and Agro-Engineering. Ed Igi-Global, (2019).

A Model for Planning the Sowing of Agricultural Crops and Raising Animals Through Two-Stage Mathematical Programming

A Model for Planning the Sowing of Agricultural Crops and Raising Animals Through Two-Stage Mathematical Programming, Gilberto Pérez Lechuga, Otilio A. Acevedo Sandoval, Karla N. Madrid Fernández, Raúl Román Aguilar. Chapter XVI in the book “Smart Computing and Innovative Optimization for Renewable Energy and Agro-Engineering. Ed Igi-Global, (2019).

The Monte Carlo Method in Financial Engineering, Chapter VIII in the book “Models for Decision Making in Economic and Financial Engineering”

The Monte Carlo Method in Financial Engineering, Chapter VIII in the book “Models for Decision Making in Economic and Financial Engineering”, José F. Martínez Sánchez, Gilberto Pérez Lechuga, Francisco Venegas Martínez Editores, Editorial UAEH-IPN, SBN: 978-607-515-298-1, 2017.

Economic aspects of production planning in manufacturing lines under conditions of uncertainty. Chapter XXV in "Modeling Economic and Financial Phenomena: A Contemporary View"

Economic aspects of production planning in manufacturing lines under conditions of uncertainty. Chapter XXV in "Modeling Economic and Financial Phenomena: A Contemporary View", Gilberto Pérez Lechuga, Ali Aali Bujari, and Francisco Venegas-Martínez, pp. 561-580, University of the Americas Puebla, ISBN: 978-607-9682- 6-8, Editorial Castdel, SA Of C.V, First edition, 2017.

Stochastic Optimization of Manufacture Systems by Using Markov Decision Processes

Stochastic Optimization of Manufacture Systems by Using Markov Decision Processes, Gilberto Pérez Lechuga, Francisco Venegas Martínez and Elvia Pérez Ramírez. Chapter 7 of the book “Handbook of Research on Modern Optimization Algorithms and Applications in Engineering and Economics” by Pandian Vasant (Universiti Teknologi Petronas, Malaysia), Gerhard-Wilhelm Weber (Middle East Technical University, Turkey) and Vo Ngoc Dieu (Ho Chi Minh City University of Technology, Vietnam). Igi-global Editors, ISBN13: 9781466696440, ISBN10: 1466696443, EISBN13: 9781466696457, DOI: 10.4018/978-1-4666-9644-0, January 2016.

Models for Decision Making in the Economic and Financial Engineering: A stochastic approach, Volume 2

Models for Decision Making in the Economic and Financial Engineering: A stochastic approach, Volume 2. José F. Martínez Sánchez, Gilberto Pérez Lechuga and Francisco Venegas Martínez (Editors). ISBN 978-607-482-408-7, Porrúa Editors., November 2015. Mexico.

A contrast in forecasting the volatility of the peso-dollar exchange

A contrast in forecasting the volatility of the peso-dollar exchange, Ruth Ortiz Zarco, Gilberto Pérez Lechuga, Miguel Flores Ortega. Chapter XV of the Book “Models for Decision Making in the Economic and Financial Engineering: A stochastic approach”, Volume 2. José F. Martínez Sánchez, Gilberto Pérez Lechuga, and Francisco Venegas Martínez (Editors). ISBN 978-607-482-408-7, Porrúa Editors., November 2015. Mexico.

Financial Engineering: Bonds, equities and derivatives

Financial Engineering: Bonds, equities and derivatives, Francisco Venegas Martínez, J. Gamboa Gerardo Ortiz and Gilberto Pérez Lechuga, Eds. Autonomous University of the Hidalgo State and the National Polytechnic Institute. ISSN 978607482380-6. November 2014.

Ingeniería financiera, bonos, acciones y derivados, vol.1

Ingeniería financiera, bonos, acciones y derivados, vol.1, Francisco Venegas-Martínez, Gerardo J. Gamboa-Ortíz and Gilberto Pérez-Lechuga, Edition: 1, ISBN: 978-607-482-380-6, (2014).

Mathematical Models for Manufacturing Systems

Mathematical Models for Manufacturing Systems, Gilberto Pérez Lechuga, (In process).

Government Promoter of Technological Change

Government Promoter of Technological Change, by Salvador Aceves García, Francisco Venegas Martínez, and Gilberto Pérez Lechuga, Ed. Porrúa, ISBN: 978-607-515-036-9, 2013.

Investment Portfolio Investment Under Uncertainty

Investment Portfolio Investment Under Uncertainty: The Model Markowitz, Chapter 11 of the book "Models for Decision Making in Finance in Economic and Financial Engineering: A Stochastic approach I", pp 311-340, Gilberto Pérez Lechuga, ISBN: 978- 607-515-037-6, Porrúa Editors, Mexico, 2013.

https://zermat.com.mx/

Consulting and implementation of a Sales and Operation Planning (S&OP) system in the company Zermat México.

https://www.plastinal.com.mx/

Consulting and implementation of a Statistical Process Control (SPC) system and of the Acceptance Sampling, in the company Plastinal.

Advisor of the firm Integral Service of Logistics and Distribution SILODISA, SAPI de C.V. Determination of the company's optimal transport fleet

Advisor of the firm Almexa Aluminum Mexican, S.A. de C.V. Period: May-June, 2015, and September-October 2015. Development of the courses: Effect Mode Failure Analysis (FMEA) and Statistical Process Control (SPC), Mexico.

Advisor of the company Maquinados e Inyecciones Tecámac S.A. de C.V. PEI Development Project: Spaces Enlightened Self-sustaining. ID number 230849, National Council of Science and Technology (CONACYT), December 2015, Mexico, January 2016.

International consultant in Operations Research and Industrial Engineering of the following firms: Sensient, Grupo Bimbo (Mexico), Barcel, Alpura (Mexico), Nadro (Mexico), Nasoft (Mexico), Marinela (Mexico), Oracle (Mexico, USA), Totis (Mexico ), Fried Totis, Greyhound Ruber Industries, Services and Products Plant Clariant Mexico, La Moderna, Flexi, and Samsonite, Metalfrío Solutions, Maquinados e Inyecciones de Tecámac, Green Barrier México, Integral Logistics and Distribution Service SILODISA SAPI de C.V., Urrea, Innova Mexico.

Technical reviewer and translator of the book "Quantitative Analysis for Management", 9th ed., ISBN 970-26-0738-8, by Barry Render, Ralph M Stair and Michael E Hanna Jr., Ed. Pearson Education, 730 pages. Inc., published by Prentice Hall, Inc., 2006.

Technical reviewer and translator of the book "Introduction to Management Sciences; A modeling and case studies approach with spreadsheets", by Frederick S. Hillier and Mark S. Hillier, 3th ed, ISBN. 10: 970-10-6532-8 AND 13: 978-970-10-6532-7, Ed. The Mc. Graw Hill Companies, Inc. 2008.

Technical reviewer of the book "Operations Research", 1th ed., ISBN 978-970-817-247-9, Marco Montufar, et.al., Grupo Editorial Patria, Mexico, 2009