Research

Research activity

• Algebraical and analytical characterization of compositional variables.
• Analitical characterization of simplicial parameterized curves.
• Simplicial closed systems: characterization and equations.
• Compositional models for growth curves.
• Optimization of wind energy production: wind regime models.

Scientific papers

• JARAUTA-BRAGULAT, E.; EGOZCUE, J.J. (2010)
  An approach to growth curves analysis from a simplicial viewpoint
  I.A. Mathematical Geoosciences - 2010.
  ISBN 978-963-06-9829-0
• HERVADA-SALA, C.; JARAUTA-BRAGULAT, E.; BUENESTADO-CABALLERO, P (2010)
  Local wind regime characterization and modelling for wind energy optimization, applying statistical and geostatistical methods
  I.A. Mathematical Geoosciences - 2010.
  ISBN 978-963-06-9829-0.
• DIAZ-BARRERO, J.L.; JARAUTA-BRAGULAT, E (2009)
  Some Additive Counterparts of CBS Inequality
  Octogon Mathematical Magazine. Vol. 17, No 1, April 2009, pp 182-188.
  ISSN 1222-5657. ISBN 978-973-88255-5-0
• BLANCO, M.; GINOVART, M.; ESTELA, M.R.; JARAUTA-BRAGULAT, E., (2009)
  Teaching and learning Mathematics and Statistics at an Agricultural Engineering School
  Quaderni di Ricerca in Didattica (Matematica)”, Supplemento n. 3, 2009.
  ISSN Code 1592-5137
• POU, J.; PINDADO, R.; JAEN, C.; ARIAS, A.; ZARAGOZA, J.; HERVADA, C.; BUENESTADO, P.; ORTEGA, C.; JARAUTA, E. (2008)
  Model, design, analysis and state-of-the-art control from the blowing wind to the sinusoidal voltages and currents
  10th World Renewable Energy Congress. WREC X. Glasgow (Scotland). United Kingdom.
  CD ROM, ISBN: 978-008-056-8973. pp 2378-2383.
• JARAUTA-BRAGULAT, E., EGOZCUE, J.J. (2008)
  Compositional evolution with mass transfer in closed systems
  CODAWORK (2008), pp 31– 43. ISBN 978-84-8458-272-4
• RUBIÓ-MASSEGÚ, J.; DÍAZ-BARRERO, J.L.; JARAUTA, E.; RUBIÓ, P.
  On the annihilated polynomial of Birkhoff interpolation
• EIXARCH, R. et al (2006)
  Teaching and Learning Calculus using WIRIS Technology in Moodle environment
• HERVADA-SALA, C., JARAUTA-BRAGULAT, E. BUENESTADO-CABALLERO, P., EL-GHAIDOUNI (2006)
  GSLIB-type program in variogram kernel estimation.
  I.A. Mathematical Geology (2006), pp 123 – 126.
  ISBN 978-2-9600644-0-7.
• BUENESTADO-CABALLERO, P., HERVADA-SALA, C., JARAUTA-BRAGULAT, E. (2006)
  Weibull parameters distribution fitting in the surface wind layer.
  I.A. Mathematical Geology (2006), pp 85 – 88. ISBN 978-2-9600644-0-7.
• BUENESTADO-CABALLERO, P.; JARAUTA-BRAGULAT, E.; HERVADA-SALA, C. (2005)
  Interpretation of wind components as compositional variables.
  CODAWORK 2005. ISBN: 84-8458-222-1 (CD-ROM)
• HERVADA-SALA, C.; JARAUTA-BRAGULAT, E. (2004)
  Optimal regional sampling network to analyse environmental pollution by heavy metals using indirect methods. case study: Galicia (NW of Spain)
  geoENV IV – Geostatistics for Environmental Applications; pp 449 – 460.
  ISBN 1-4020-2114-3. Kluwer Academic Publishers.
• HERVADA-SALA, C., JARAUTA-BRAGULAT, E., (2004)
  A program to perform Ward's clustering method on several regionalized variables
  Computers & Geosciences.
  ISSN: 0098-3004. Vol 30, Issue 8, October 2004, pp 881-886
• HERVADA-SALA,C.; JARAUTA BRAGULAT, E.; TYUTYUNNIK, Y.G.; BLUM, O.B. (2003)
  Indirect geostatistical methods to assess environmental pollution by heavy metals.
  Case study: Ukraine.
  IAMG annual edition. ISBN: 0 – 9734220 – 0 - 9
• JARAUTA BRAGULAT, E.; HERVADA-SALA,C. (2003)
  Comparison of kriging results of regionalised compositional data using three different data transformations. case study: bauxites in Hungary
  IAMG annual edition. ISBN: 0 – 9734220 – 0 - 9
• JARAUTA-BRAGULAT, E.; BUENESTADO-CABALLERO, P.; HERVADA-SALA,C. (2003)
  An algebraic method to compute isometric logratio transformation and back transformation of compositional data
  IAMG annual edition. ISBN: 0 – 9734220 – 0 - 9
• JARAUTA-BRAGULAT, E. , HERVADA SALA, C., TYUTYUNNIK, Y.G. (2003)
  Monitorización de la contaminación radiactiva del suelo por los radionúclidos 90Sr y 137Cs. Aplicación al estudio de la zona de exclusión de la central nuclear de Chernóbil
  Publicaciones de la Universidad de Cádiz. Aportaciones de la Estadística a los estudios Medioambientales (Pp 91 - 104). ISBN 84-7786-881-6.
• HERVADA-SALA, C., JARAUTA-BRAGULAT, E., DIBLASI, A.M. (2002)
  Adapted Ward’s clustering method: generalization to several variables using the fast Fourier transform.
  Terra Nostra. ISSN: 0946-8978, Volume 2002-1, pp 299 – 303
• JARAUTA-BRAGULAT, E., HERVADA-SALA, C. DIBLASI, A.M. (2002)
  An experimental comparison of cokriging of regionalized compositional data using four different methods. case study: bauxites in Hungary.
  Terra Nostra. ISSN: 0946-8978, Volume 2002-1, pp 417 - 422
• HERVADA-SALA, C., JARAUTA-BRAGULAT, E. (2001)
  Modifications to KB2D program in GSLIB to allow use of tabulated covariances calculated with fast Fourier transform method.
  Computers & Geosciences.ISSN: 0098-3004. Vol. 27, núm. 07, pp 887-889
• HERVADA-SALA, C.; PAWLOWSKY-GLAHN, V.; JARAUTA-BRAGULAT, E. (2000)
  A statistical method to downscale temperature forecasts. A case study in Catalonia
  Meteorological Applications. Vol. 7, pp. 75–82
• HERVADA-SALA, C.; JARAUTA-BRAGULAT, E. (1998)
  Presenting, analysing and comparing two soil moisture regime simulation models.
  Application to moisture regimes estimation of Catalonia soils.
• JARAUTA-BRAGULAT, E.; COLOMER-CUGAT, M.A.; VILA-NAVARRA, D. (1997)
  A program for soil moisture regime estimation with stochastic precipitation and temperature simulation models. Application to nord-east of Spain
  Proceedings of IAMG’97.
• JARAUTA-BRAGULAT, E.; PORTA, J.; BOIXADERA, J. (1994)
  Règims d'humitat dels sòls: interès i problemàtica en l'aplicació als sòls de Catalunya Butlletí de la Societat Catalana d'Història Natural, núm. 61, pp. 87–96.
• JARAUTA-BRAGULAT, E.; PORTA, J. (1990)
  Un nuevo modelo simulativo para la estimación del régimen de humedad de los suelos Métodos Numéricos en Ingeniería, pp 491–497.
• Doctoral Thesis (1989). Abstract.
• Doctoral Thesis doctoral (1989). Full text.

Research projectes

• Soil moisture regimes of southern Lleida’s area soils. (1984 – 1988)
• Soil moisture regime models. Aplication to southern Lleida’s area soils. (1988 – 1989)
• Soil moisture regime estimation. Aplication to soil moisture regime determination of southern Lleida’s area soils.. (1989 – 1990)
• Characterization of soil moisture regimes of southern Lleida’s area soils. (1994 – 1996)
• Statistical analisys of compositional data and its application to Earth and Space sciences. (1997 – 2000)
• Study of low-voltage energy converters for cost reduction and reliability improvement in wind energy systems.  (2007 – 2010)