Research articles

Articles collected in Web of Science and Scopus

01/11/2020

Performance analysis of a hybrid ventilation system in a near zero energy building

Authors: Rey-Hernández, J.M.; San José-Alonso, J.F.; Velasco-Gómez, E.; Yousif, C.; Rey-Martínez, F.J.
Journal: Building and Environment 2020, 185, 107265
Impact: [JCR (2019): 4.971 ENGINEERING, CIVIL Position: 4/134 Quartile: Q1 Tertile: T1]
DOI: 10.1016/j.buildenv.2020.107265

Experimental Investigation of the Potential of a New Fabric-Based Evaporative Cooling Pad

Authors: Velasco-Gómez, E.; Tejero-González, A.; Jorge-Rico, J.; Rey-Martínez, F.J.
Journal: Sustainability 2020, 12 (17), 7070
Impact: [JCR (2019): 2.576 ENVIRONMENTAL STUDIES Position: 120/265 Quartile: Q2 Tertile: T2]
DOI: 10.3390/su12177070

Comparative study of heat pump system and biomass boiler system to a tertiary building using the Life Cycle Assessment (LCA)

Authors: Lozano Miralles, J.A.; López García, R.; Palomar Carnicero, J.M.; Rey-Martínez, F.J.
Journal: Renewable Energy 2020, 152, 1439-1450
Impact: [JCR (2019): 6.274 ENERGY&FUELS Position: 19/112 Quartile: Q1 Tertile: T1]
DOI: 10.1016/j.renene.2019.12.148

Energy Consumption Reduction of a Chiller Plant by Adding Evaporative Pads to Decrease Condensation Temperature

Authors: Rey-Martínez, F.J.; San José-Alonso, J.F.; Velasco-Gómez, E.; Tejero-González, A.; Esquivias-Fernández, P.M.; Rey-Hernández, J.M.
Journal: Energies 2020, 13 (9), 2218
Impact: [JCR (2019): 2.576 ENVIRONMENTAL STUDIES Position: 120/265 Quartile: Q2 Tertile: T2]
DOI: 10.3390/en13092218

A study of thermal comfort in naturally ventilated churches in a Mediterranean climate

Authors: Vella, R.C.; Rey-Martínez, F.J.; Yousif, C.; Gatt, D.
Journal: Energy and Buildings 2020, 213, 109843
Impact: [JCR (2019): 4.867 ENGINEERING, CIVIL Position: 5/134 Quartile: Q1 Tertile: T1]
DOI: 10.1016/j.enbuild.2020.109843

Industrial Decarbonization by a New Energy-Baseline Methodology. Case Study

Authors: Castrillón-Mendoza, R.; Rey-Hernández, J.M.; Rey-Martínez, F.J.
Journal: Sustainability 2020, 12 (5), 1960
Impact: [JCR (2019): 2.576 ENVIRONMENTAL STUDIES Position: 120/265 Quartile: Q2 Tertile: T2]
DOI: 10.3390/su12051960

Data supporting the forecast of electricity generation capacity from non-conventional renewable energy sources in Colombia

Authors: Sagastume Gutiérrez, A.; Balbis Morejón, M.; Cabello Eras, J.J.; Cabello Ulloa, M.; Rey-Martínez, F.J.; Rueda-Bayona, J.G.
Journal: Data in Brief 2020, 28, 104949
DOI: 10.1016/j.dib.2019.104949

Personalized Evaporative Cooler to Reduce Energy Consumption and Improve Thermal Comfort in Free-Running Spaces

Authors: Tejero-González, A.; Esquivias-Fernández, P.M.
Journal: Sustainability 2019, 11 (22), 6451
Impact: JCR (2019): 2.576 ENVIRONMENTAL STUDIES Position: 120/265 Quartile: Q2 Tertile: T2
DOI: 10.3390/su11226451

Smart energy management of combined ventilation systems in a nZEB

Authors: Rey-Hernández, J.M.; González-González, S.L.; San José-Alonso, J.F.; Tejero-González, A.; Velasco-Gómez, E.; Rey-Martínez, F.J.
Journal: E3S Web of Conferences 2019, 111, CLIMA 2019 Congress, 01050
Impact: SJR (2019): 0.166 ENERGY (miscellaneous) Quartile: Q3
DOI: 10.1051/e3sconf/201911101050

Improved performance of a PV integrated ventilated façade at an existing NZEB

Authors: Tejero-González, A.; Krawczyk, D.A.; Martín-Sanz García, J.R.; Rey-Martínez, F.J.; Velasco-Gómez, E.
Journal: Energies 2019, 12 (15), 3033
Impact: JCR (2019): 2.702 ENERGY & FUELS Position: 63/112 Quartile: Q3 Tertile: T2
DOI: 10.3390/en12153033

Analysis of the Methodology to Obtain Several Key Indicators Performance (KIP), by Energy Retrofitting of the Actual Building to the District Heating Fuelled by Biomass, Focusing on nZEB Goal: Case of Study

Authors: Castrillón-Mendoza, R.; Rey-Hernández, J.M.; Velasco-Gómez, E.; San José-Alonso, J.F.; Rey-Martínez, F.J.
Journal: Energies 2019, 12 (1), 93
Impact: JCR (2019): 2.702 ENERGY & FUELS Position: 63/112 Quartile: Q3 Tertile: T2
DOI: 10.3390/en12010093

Monitoring Data Study of the Performance of Renewable Energy Systems in a Near Zero Energy Building in Spain: A Case Study

Authors: Rey-Hernández, J.M.; Velasco-Gómez, E.; San José-Alonso, J.F.; Tejero-González, A.; González-González, S.L.; Rey-Martínez, F.J.
Journal: Energies 2018, 11(11), 2979
Impact: JCR (2018): 2.707 ENERGY & FUELS Position: 56/103 Quartile: Q3 Tertile: T2
DOI: 10.3390/en11112979

Energy efficiency analysis carried out by installing district heating on a university campus. A case study in Spain

Authors: Marina-Domingo, A.M.; Rey-Hernández, J.M.; San José-Alonso, J.F.; Mata-Crespo, R.; Rey-Martínez, F.J.
Journal: Energies 2018, 11(10), 2826
Impact: JCR (2018): 2.707 ENERGY & FUELS Position: 56/103 Quartile: Q3 Tertile: T2
DOI: 10.3390/en11102826

Modelling the long-term effect of climate change on a zero energy and carbon dioxide building through energy efficiency and renewables

Authors: Rey-Hernández, J.M.; Yousif, C.; Gatt, D.; Velasco-Gómez, E.; San José-Alonso, J.F.; Rey-Martínez, F.J.
Journal: Energy and Buildings 2018, 174, 85-96
Impact: JCR (2018): 4.495 CONSTRUCTION & BUILDING TECHNOLOGY Position: 7/63 Quartile: Q1 Tertile: T1
DOI: 10.1016/j.enbuild.2018.06.006

Life cycle assessment (LCA) methodology of air/air heat pump applied to a tertiary building as a contribution to renewable energy

Authors: Lozano-Miralles, J.A.; Palomar-Carnicero, J.M.; López-García, R.; Rey-Martínez, F.J.
Journal: DYNA 2018, 93(3), 262-267
Impact: JCR (2018): 0.562 ENGINEERING, MULTIDISCIPLINARY Position: 82/88 Quartile: Q4 Tertile: T3
DOI: 10.6036/8465

Energy analysis at a near zero energy building. A case-study in Spain

Authors: Rey-Hernández, J.M.; Velasco-Gómez, E.; San José-Alonso, J.F.; Tejero-González, A.; Rey-Martínez, F.J.
Journal: Energies 2018, 11(4), 857
Impact: JCR (2018): 2.707 ENERGY & FUELS Position: 56/103 Quartile: Q3 Tertile: T2
DOI: 10.3390/en11040857

Transformation of a University Lecture Hall in Valladolid (Spain) into a NZEB: LCA of a BIPV System Integrated in Its Façade

Authors: Palacios-Jaimes, G.Y.; Martín-Ramos, P.; Rey-Martínez, F.J.; Alonso-Fernández-Coppel, I.
Journal: International Journal of Photoenergy 2017, 2478761
Impact: JCR (2017): 1.547 ENERGY & FUELS Position: 61/97 Quartile: Q3 Tertile: T2
DOI: 10.1155/2017/2478761

A new method for calculating conduction response factors for multilayer constructions based on frequency–Domain spline interpolation (FDSI) and asymptotic analysis

Authors: Sanza-Pérez, J.; Andrés-Chicote, M.; Varela-Díez, F.; Velasco-Gómez, E.
Journal: Energy and Buildings 2017, 148, 280-297
Impact: JCR (2017): 4.457 CONSTRUCTION & BUILDING TECHNOLOGY Position: 5/62 Quartile: Q1 Tertile: T1
DOI: 10.1016/j.enbuild.2017.04.010

Alternative for summer use of solar air heaters in existing buildings

Authors: González-González, S.L.; Tejero-González, A.; Rey-Martínez, F.J.; Andrés-Chicote, M.
Journal: Energies 2017, 10(7), 985
Impact: JCR (2017): 2.262 ENERGY & FUELS Position: 48/97 Quartile: Q2 Tertile: T2
DOI: 10.3390/en10070985

Assessing the applicability of passive cooling and heating techniques through climate factors: An overview

Authors: Tejero-González, A.; Andrés-Chicote, M.; García-Ibáñez, P.; Velasco-Gómez, E.; Rey-Martínez, F.J.
Journal: Renewable and Sustainable Energy Reviews 2016, 65(1), 727-742
Impact: JCR (2016): 8.050 ENERGY & FUELS Position: 5/92 Quartile: Q1 Tertile: T1
DOI: 10.1016/j.rser.2016.06.077

Indoor air quality and thermal comfort evaluation in a spanish modern low-energy office with thermally activated building systems

Authors: Rey-Martínez, F.J.; Andrés-Chicote, M.; Villanueva-Peñalver, A.; Tejero-González, A.; Velasco-Gómez, E.
Journal: Science and Technology for the Built Environment 2015, 21 (8), 1091-1099
Impact: SJR (2015): 0.614 BUILDING AND CONSTRUCTION Quartile: Q2
DOI: 10.1080/23744731.2015.1056655

Influence of constructive parameters on the performance of two indirect evaporative cooler prototypes

Authors: Tejero-González, A.; Andrés-Chicote, M.; Velasco-Gómez, E.; Rey-Martínez, F.J.
Journal: Applied Thermal Engineering 2013, 51(1-2), 1017-1025
Impact: JCR (2013): 2.624 THERMODYNAMICS Position: 6/55 Quartile: Q1 Tertile: T1
DOI: 10.1016/j.applthermaleng.2012.10.054

Experimental study on the cooling capacity of a radiant cooled ceiling system

Authors: Andrés-Chicote, M.; Tejero-González, A.; Velasco-Gómez, E.; Rey-Martínez, F.J.
Journal: Energy and Buildings 2012, 54, 207-214
Impact: JCR (2012): 2.679 CONSTRUCTION & BUILDING TECHNOLOGY Position: 4/57 Quartile: Q1 Tertile: T1
DOI: 10.1016/j.enbuild.2012.07.043

Experimental characterisation of an indirect evaporative cooling prototype in two operating modes

Authors: Velasco-Gómez, E.; Tejero-González, A.; Rey-Martínez, F.J.
Journal: Applied Energy 2012, 97, 340-346
Impact: JCR (2012): 4.781 ENERGY & FUELS Position: 6/81 Quartile: Q1 Tertile: T1
DOI: 10.1016/j.apenergy.2011.12.065

The harmonic method: A new procedure to obtain wall periodic cross response factors

Authors: Varela-Díez, F.; Rey-Martínez, F.J.; Velasco-Gómez, E.; Aroca-Lastra, S.
Journal: International Journal of Thermal Sciences 2012, 58, 20-28
Impact: JCR (2012): 2.470 THERMODYNAMICS Position: 5/55 Quartile: Q1 Tertile: T1
DOI: 10.1016/j.ijthermalsci.2012.03.005

Life cycle assessment of a semi-indirect ceramic evaporative cooler vs. a heat pump in two climate areas of Spain

Authors: Rey-Martínez, F.J.; Velasco-Gómez, E.; Martín-García, C.; Sanz-Requena, J.F.; Navas-Gracia, L.M.; Hernández-Navarro, S.; Correa-Guimaraes, A.; Martín-Gil, J.
Journal: Applied Energy 2011, 88 (3), 914-921
Impact: JCR (2011): 5.106 ENERGY & FUELS Position: 7/81 Quartile: Q1 Tertile: T1
DOI: 10.1016/j.apenergy.2010.08.025

Comparative study between a ceramic evaporative cooler (CEC) and an air-source heat pump applied to a dwelling in Spain

Authors: Rey-Martínez, F.J.; Velasco-Gómez, E.; Tejero-González, A.; Flores-Murrieta, F.E.
Journal: Energy and Buildings 2010, 42 (10), 1815-1822
Impact: JCR (2010): 2.046 CONSTRUCTION & BUILDING TECHNOLOGY Position: 4/53 Quartile: Q1 Tertile: T1
DOI: 10.1016/j.enbuild.2010.05.018

Experimental characterisation of the operation and comparative study of two semi-indirect evaporative systems

Authors: Velasco-Gómez, E.; Rey-Martínez, F.J.; Tejero-González, A.
Journal: Applied Thermal Engineering 2010, 30 (11-12), 1447-1454
Impact: JCR (2010): 1.826 THERMODYNAMICS Position: 9/51 Quartile: Q1 Tertile: T1
DOI: 10.1016/j.applthermaleng.2010.03.004

Life cycle analysis of a thermal solar installation at a rural house in Valladolid (Spain)

Authors: Rey-Martínez, F.J.; Velasco-Gómez, E.; Martín-Gil, J.; Navas-Gracia, L.M.; Hernández-Navarro, S.
Journal: Environmental Engineering Science 2008, 25 (5), 713-723
Impact: JCR (2008): 1.039 ENVIRONMENTAL SCIENCES Position: 111/163 Quartile: Q3 Tertile: T3
DOI: 10.1089/ees.2007.0115

Thermal comfort analysis of a low temperature waste energy recovery system: SIECHP

Authors: Herrero-Martín, R.; Rey-Martínez, F.J.; Velasco-Gómez, E.
Journal: Energy and Buildings 2008, 40 (4), 561-572
Impact: JCR (2008): 1.590 CONSTRUCTION & BUILDING TECHNOLOGY Position: 3/38 Quartile: Q1 Tertile: T1
DOI: 10.1016/j.enbuild.2007.04.009

Building Energy Analysis (BEA): A methodology to assess building energy labelling

Authors: Rey-Martínez, F.J.; Velasco-Gómez, E.; Varela-Díez, F.
Journal: Energy and Buildings 2007, 39 (6), 709-716
Impact: JCR (2007): 0.834 CONSTRUCTION & BUILDING TECHNOLOGY Position: 7/34 Quartile: Q1 Tertile: T1
DOI: 10.1016/j.enbuild.2006.07.009

Description and experimental results of a semi-indirect ceramic evaporative cooler

Authors: Velasco-Gómez, E.; Rey-Martínez, F.J.; Varela-Díez, F.; Molina-Leyva, M.J.; Herrero-Martín, R.
Journal: International Journal of refrigeration 2005, 28 (5), 654-662
Impact: JCR (2005): 0.874 ENGINEERING, MECHANICAL Position: 21/104 Quartile: Q1 Tertile: T1
DOI: 10.1016/j.ijrefrig.2005.01.004

Life cycle assessment and external environmental cost analysis of heat pumps

Authors: Rey-Martínez, F.J.; Martin-Gil, J.; Velasco-Gómez, E.; Pérez, D.; Varela-Díez, F.; Palomar-Carnicero, J.M.; Dorado-Pérez, M.P.
Journal: Environmental Engineering Science 2004, 21 (5), 591-605
Impact: JCR (2004): 0.865 ENGINEERING, ENVIRONMENTAL Position: 15/35 Quartile: Q2 Tertile: T2
DOI: 10.1089/ees.2004.21.591

Comparative study of two different evaporative systems: An indirect evaporative cooler and a semi-indirect ceramic evaporative cooler

Authors: Rey-Martínez, F.J.; Velasco-Gómez, E.; Herrero-Martín, R.; Martínez-Gutiérrez, J.; Varela-Díez, F.
Journal: Energy and Buildings 2004, 36 (7), 696-708
Impact: JCR (2004): 0.735 CONSTRUCTION & BUILDING TECHNOLOGY Position: 5/31 Quartile: Q1 Tertile: T1
DOI: 10.1016/j.enbuild.2003.10.010

Design and experimental study of a mixed energy recovery system, heat pipes and indirect evaporative equipment for air conditioning

Authors: Rey-Martínez, F.J.; Álvarez-Guerra, M.A.; Velasco-Gómez, E.; Varela-Díez, F.; Herrero-Martín, R.
Journal: Energy and Buildings 2003, 35 (10), 1021-1030
Impact: JCR (2003): 0.513 CONSTRUCTION & BUILDING TECHNOLOGY Position: 9/29 Quartile: Q2 Tertile: T1
DOI: 10.1016/S0378-7788(03)00056-2

Experimental study of indoor air quality, energy saving and analysis of ventilation norms in climatised areas

Authors: Rey-Martínez, F.J.; Velasco-Gómez, E.
Journal: Energy and Buildings 2000, 33 (1), 57-67
Impact: JCR (2000): 0.368 CONSTRUCTION & BUILDING TECHNOLOGY Position: 11/28 Quartile: Q2 Tertile: T2
DOI: 10.1016/S0378-7788(00)00064-5

Study on environmental quality of a surgical block

Authors: San José-Alonso, J.F.; Velasco-Gómez, E.; Rey-Martínez, F.J.; Álvarez-Guerra, M.A.; Gallego-Peláez, M.C.
Journal: Energy and Buildings 1999, 29 (2), 179-187
Impact: JCR (1999): 0.180 CONSTRUCTION & BUILDING TECHNOLOGY Position: 19/26 Quartile: Q3 Tertile: T3
DOI: 10.1016/S0378-7788(98)00058-9

Simulation model of an indirect evaporative cooler

Authors: San José-Alonso, J.F.; Rey-Martínez, F.J.; Velasco-Gómez, E.; Álvarez-Guerra, M.A.
Journal: Energy and Buildings 1998, 29 (1), 23-27
Impact: JCR (1998): 0.340 CONSTRUCTION & BUILDING TECHNOLOGY Position: 9/25 Quartile: Q2 Tertile: T2
DOI: 10.1016/S0378-7788(98)00014-0

Biomass as an energy resource in Castile and leon (Spain)

Authors: Antolín-Giraldo, G.; Irusta-Mata, R.; Velasco-Gómez, E.; Carrasco-García, J.E.; González, E.; Ortíz, L.
Journal: Energy 1996, 21 (3), 165-172
Impact: JCR (1996): 1.159 ENERGY & FUELS Position: 5/56 Quartile: Q1 Tertile: T1
DOI: 10.1016/0360-5442(95)00106-9

The selection of testing methods for biofuels using the Taguchi signal-to-noise ratio

Authors: Irusta-Mata, R.; Antolín-Giraldo, G.; Velasco-Gómez, E.; García, J.C.
Journal: Biomass and Bioenergy 1994, 6 (5), 405-413
DOI: 10.1016/0961-9534(94)E0035-Q

Characterization of fatty acid methyl esters by thermal analysis

Authors: Rey-Martínez, F.J.; Chamorro, O.; Martín-Gil, F.J.; Martín-Gil, J.
Journal: Journal of Thermal Analysis 1993, 40 (2), 463-473
Impact: JCR (1993): 0.396 CHEMISTRY, ANALYTICAL Position: 40/46 Quartile: Q4 Tertile: T3
DOI: 10.1007/BF02546615

Thermal analysis of agricultural residues with application to production fuels

Authors: Rey-Martínez, F.J.; Martin-Gil, J.; Villamañán-Olfos, M.A.; San José-Alonso, J.F.
Journal: Journal of Thermal Analysis 1993, 40 (1), 239-247
Impact: JCR (1993): 0.396 CHEMISTRY, ANALYTICAL Position: 40/46 Quartile: Q4 Tertile: T3
DOI: 10.1007/BF02546574

Salt Effect on Vapor–Liquid Equilibrium of Methyl tert-Butyl Ether + Methanol at 298.15 K

Authors: Velasco-Gómez, E.; Cocero-Alonso, M.J.; Mato-Chain, F.
Journal: Journal of Chemical and Engineering Data 1990, 35 (1), 21-23
Impact: JCR (1990): 0.669 ENGINEERING, CHEMICAL Position: 14/55 Quartile: Q2 Tertile: T1
DOI: 10.1021/je00059a006

Thermodynamics of ketones and diether mixtures: Analysis in terms of group contribution (DISQUAC)

Authors: Rey-Martínez, F.J.; Martin-Gil, J.
Journal: Thermochimica Acta 1989, 144 (1), 1-11
Impact: JCR (1989): 0.638 CHEMISTRY, ANALYTICAL Position: 24/41 Quartile: Q3 Tertile: T2
DOI: 10.1016/0040-6031(89)85079-8

Kinetic analysis of thermal decomposition of praseodymium(III) nitrate hexahydrate

Authors: Rey-Martínez, F.J.; Martin-Gil, J.; Gonzáles, A.; Martín-Gil, F.J.
Journal: Journal of Thermal Analysis 1989, 35 (3), 805-813
Impact: JCR (1989): 0.302 CHEMISTRY, ANALYTICAL Position: 36/41 Quartile: Q4 Tertile: T3
DOI: 10.1007/BF02057236

Excess enthalpies of ketone-triether mixtures. Measurement and application of the disquac group contribution method

Authors: Rey-Martínez, F.J.; Martin-Gil, J.
Journal: Thermochimica Acta 1989, 141, 269-275
Impact: JCR (1989): 0.638 CHEMISTRY, ANALYTICAL Position: 24/41 Quartile: Q3 Tertile: T2
DOI: 10.1016/0040-6031(89)87062-5

Thermodynamics of ketones + ether mixtures using a generalized quasichemical theory in terms of group surface interactions

Authors: Rey-Martínez, F.J.; Martin-Gil, J.
Journal: Thermochimica Acta 1988, 136, 33-43
Impact: JCR (1988): 0.584 CHEMISTRY, ANALYTICAL Position: 30/41 Quartile: Q3 Tertile: T3
DOI: 10.1016/0040-6031(88)87425-2

Excess molar enthalpies of (a ketone + di-n-butyl ether) at 298.15 K

Authors: Rey-Martínez, F.J.; Martin-Gil, J.
Journal: Journal of Chemical Thermodynamics 1988, 20 (12), 1417-1421
Impact: JCR (1988): 1.034 CHEMISTRY, PHYSICAL Position: 27/51 Quartile: Q3 Tertile: T2
DOI: 10.1016/0021-9614(88)90035-3

DTG and DTA studies on amino acids

Authors: Rodriguez-Mendez, M.L.; Rey-Martínez, F.J.; Martin-Gil, J.; Martin-Gil, F.J.
Journal: Thermochimica Acta 1988, 134, 73-78
Impact: JCR (1988): 0.584 CHEMISTRY, ANALYTICAL Position: 30/41 Quartile: Q3 Tertile: T3
DOI: 10.1016/0040-6031(88)85219-5

DTG and DTA studies on sugar derivatives

Authors: Rey-Martínez, F.J.; Ramos-Sanchez, M.C.; Rodriguez-Mendez, M.L.; Martin-Gil, J.; Martin-Gil, F.J.
Journal: Thermochimica Acta 1988, 134, 67-72
Impact: JCR (1988): 0.584 CHEMISTRY, ANALYTICAL Position: 30/41 Quartile: Q3 Tertile: T3
DOI: 10.1016/0040-6031(88)85218-3

DTG and DTA studies on typical sugars

Authors: Ramos-Sanchez, M.C.; Rey-Martínez, F.J.; Rodriguez-Mendez, M.L.; Martin-Gil, F.J.; Martin-Gil, J.
Journal: Thermochimica Acta 1988, 134, 55-60
Impact: JCR (1988): 0.584 CHEMISTRY, ANALYTICAL Position: 30/41 Quartile: Q3 Tertile: T3
DOI: 10.1016/0040-6031(88)85216-X

Excess enthalpies of ketones + diether at 298.15 K

Authors: Rey-Martínez, F.J.; Martin-Gil, J.
Journal: Thermochimica Acta 1988, 130, 375-379
Impact: JCR (1988): 0.584 CHEMISTRY, ANALYTICAL Position: 30/41 Quartile: Q3 Tertile: T3
DOI: 10.1016/0040-6031(88)87085-0

Research Group on Thermal Energy Engineering of the University of Valladolid

RRG Recognized Research Group of the University of Valladolid CRU 053 Consolided Research Unit of Castile and Leon

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Articles collected in Web of Science and Scopus

RRG Recognized Research Group of the University of Valladolid
CRU 053 Consolided Research Unit of Castile and Leon