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Papers



Forthcomings

Ortega, J. L. (in press), Toward a homogenization of academic social sites: a longitudinal study of profiles in Academia.edu, Google Scholar Citations and ResearchGate,
Online Information Review

2017

Ortega, J. L. (2017), Are peer-review activities related to reviewer bibliometric performance? A scientometric analysis of Publons,
Scientometrics, 112(2): 947-962

2016

Ortega, J. L. (2016), Social Network Sites for Scientists: A Quantitative survey. Oxford, UK: Chandos Publishing (Elsevier Group), pp. 198, ISBN: 9780081005927

Ortega, J. L. (2016), To be or not to be on Twitter, and its relationship with the tweeting and citation of research papers,
Scientometrics, 109(2): 1353-1364

2015

Ortega, J. L. (2015), Differences and evolution of scholarly impact in Google Scholar Citations profiles: An application of Decision trees,
Revista Española de Documentación Científica, 38(4): e102

Ortega, J. L. (2015), Disciplinary differences in the use of academic social networking sites,
Online Information Review, 39(4): 520-536

Ortega, J. L. (2015), How is an academic social site populated? A demographic study of Google Scholar Citations population,
Scientometrics, 104(1): 1-18

Ortega, J. L. (2015), Relationship between altmetric and bibliometric indicators across academic social sites: the case of CSIC’s members,
Journal of Informetrics, 9(1): 39-49

2014

Ortega, J. L. (2014), Academic Search Engines: A Quantitative Outlook. Oxford, UK: Chandos Publishing (Elsevier Group), pp. 200, ISBN: 1843347911

Ortega, J. L. (2014), Influence of co-authorship networks in the research impact: Ego network analyses from Microsoft Academic Search,
Journal of Informetrics, 8(3): 728-737

Ortega, J. L., Aguillo, I. F. (2014), Microsoft Academic Search and Google Scholar Citations: A comparative analysis of author profiles,
Journal of the American Society for Information Science and Technology, 65(6):1149-1156

Ortega, J. L., Orduña, E., Aguillo, I. F. (2014), Are web mentions accurate substitutes of inlinks for Spanish universities? Online Information Review, 38(1): 59-77

Orduña, E., Ortega, J. L., Aguillo, I. F. (2014), Influence of language and file type on the web visibility of top European universities,Aslib Journal of Information Management, 66(1): 96-116


2013

Ortega, J. L., Aguillo, I. F. (2013),Institutional and country collaboration in an online service of scientific profiles: Google Scholar Citations,Journal of Informetrics, 7(2): 394-403

Ortega, J. L., Aguillo, I. F. (2013),Network visualisation as a way to the web usage analysis, Aslib Proceedings, 65(1): 40-53


2012

Ortega, J. L., Aguillo, I. F. (2012),Science is all in the eye of the beholder: keyword maps in Google Scholar Citations,
Journal of the American Society for Information Science and Technology, 63(12): 2370-2377

2011

Utrilla-Ramírez, A. M., Aguillo, I. F., Ortega, J. L., (2011), Visibilidad de la web hospitalaria iberoamericana: Perspectiva de su actividad científica en internet , Medicina Clínica, 137(13): 605-611

Ortega, J. L. (2011), Collaboration pattern in patent networks and their relationships with the transfer of technology: the case study of the CSIC patents , Scientometrics, 87(3): 657-666

Ortega, J. L., Aguillo, I. F. (2011),
Social Network Tools for the Assessment of the University Web Performance, In: White, B., King, I., Tsang, P. (eds.) Social Media Tools and Platforms in Learning Environments. Spinger ISBN 978-3-642-20391-6

Ortega, J. L., López-Romero, E., Fernández, I. (2011),
Multivariate approach to classify research institutes according to their outputs: the case of the CSIC's institutes, Journal of Informetrics, 5(3): 323-33

2010

Aguillo, I. F., Bar-Ilan, J., Levene, M., Ortega, J. L. (2010), Comparing university rankings, Scientometrics, 85(1): 243-256

Aguillo, I. F., Ortega, J. L., Fernández, M., Utrilla, A. M. (2010), Indicators for a webometric ranking of open access repositories, Scientometrics, 82(3): 477-486

Ortega, J. L., Aguillo, I. F. (2010), La participación española en los programas europeos: análisis estructural del área de salud del 6º Programa Marco, Revista Española de Documentación Científica, 33(2):287-297

Ortega, J. L., Aguillo, I. F. (2010), Describing national science and technology systems through a multivariate approach: country participation in the 6th Framework Programmes, Scientometrics, 84(2): 321-330

Ortega, J. L., Aguillo, I. F. (2010), Network collaboration in the 6th Framework Programmes: country participation in the health thematic area, Scientometrics, 84(3): 835-844

Ortega, J. L., Aguillo, I. F. (2010), Shaping the European research collaboration in the 6th Framework Programme health thematic area through network analysis, Scientometrics, 85(1): 377-386

Ortega, J. L., Aguillo, I. F. (2010), Differences between web sessions according to the origin of their visits, Journal of Informetrics, 4(3): 331-337


2009

Fernández, M., Zamora, H., Ortega, J. L., Utrilla, A. M., Aguillo, I. F. (2009), Género y visibilidad web de la actividad de profesores universitarios españoles: el caso de la Universidad Complutense de Madrid, Revista Española de Documentación Científica, 32(2): 51-65

Ortega, J. L., Aguillo, I. F. (2009), North America Academic Web Space: Multicultural Canada vs. The United States Homogeneity, ASIST & ISSI Pre-Conference Symposium on Informetrics and Scientometrics, Vancouver, Canada

2008

Aguillo, I. F., Ortega, J. L., Fernández, M. (2008), Webometrcis Ranking of World Universities: Introduction, Methodology and Future Developments, High Education in Europe, 33(2-3): 233-244

Ortega, J. L., Aguillo, I., Cothey, V., Scharnhorst, A. (2008),
Maps of the academic web in the European Higher Education Area - an exploration of visual web indicators, Scientometrics, 74(2): 295-308 [html]

Ortega, J. L., Aguillo, I. F. (2008), Visualization of the Nordic academic web: Link analysis using Social Network tools
,Information Processing & Management, 44(4): 1624-1633

Ortega, J. L., Aguillo, I. F. (2008),
Linking patterns in the European Union’s Countries: geographical maps of the European academic web space ,Journal of Information Science, 34(5), 705-714

Ortega, J. L., Aguillo, I. F. (2008).
Análisis estructural de una red social en línea: la red española de Flickr, El Profesional de la Información, 17(6)

Ortega, J. L., Aguillo, I. F. (2008), Germany in the European academic web space, Fourth International Conference on Webometrics, Informetrics and Scientometrics & Ninth COLLNET, Berlin, Germany

2007

Aguillo, I. F., Ortega, J. L., Prieto, J. A., Granadino, B. (2007),
Indicadores Web de actividad científica formal e informal en Latinoamérica, Revista Española de Documentación Científica, 30(1): 49-60

Ortega, J. L. (2007), Visualización de la web universitaria europea: Análisis cuantitativo de enlaces a través de técnicas cibermétricas [PhD Tesis] Madrid: Universidad Carlos III de Madrid

Ortega, J. L., Aguillo, I. (2007),
La web académica española en el contexto del Espacio Europeo de Educación Superior: estudio exploratorio, El Profesional de la Información, 16(5): 417-425

Ortega, J. L., Aguillo, I. (2007),
Interdisciplinary relationships in the Spanish academic web space: A Webometric study through networks visualization, Cybermetrics, 11(1): paper 4

Ortega, J. L., Aguillo, I. (2007), Linear analysis of cybermetric data: Quantifying the European university web space, 11th International Conference of the International Society for Scientometrics and Informetrics, Madrid, Spain

Zamora, H., Aguillo, I. F., Ortega, J. L., Granadino, B. (2007), Calidad formal, impacto y visibilidad de las revista-e universitarias españolas, El Profesional de la Información, 16(1): 13-23

2006

Aguillo, I. F., Granadino, B., Ortega, J. L., Prieto, J. A. (2006), Scientific research activity and communication measured with cybermetrics indicators, Journal of the American Society for Information Science and Technology, 57(10): 1296-1302

Aguillo, I. F., Ortega, J. L., Granadino, B. (2006), Webometric evidence of an academic digital divide in France, 9th International Conference on Science and Technology Indicators, Leuven, Belgium

Aguillo, I. F.,
Ortega, J. L., Granadino, B. (2006),Contenidos del buscador Google: Distribución por países, dominios e idiomas, El Profesional de la Información, 15(5): 384-389

Aguillo, I. F., Ortega, J. L., Granadino, B. (2006), Evaluación de la presencia en la Web: Un nuevo reto para científicos y tecnólogos españoles, Acta Científica y Tecnológica, 11: 17-19
 
Ortega, J. L., Aguillo, I. (2006), Análisis de co-enlaces: una aproximación teórica, El Profesional de la Información, 15(4): 270-277

Ortega, J. L., Aguillo, I., Prieto, J. A. (2006),
Longitudinal Study of Contents and Elements in the Scientific Web environment, Journal of Information Science, 32 (4): 344-351

2005

Aguillo, I. F., Granadino, B., Ortega, J. L., Prieto, J. A. (2005), What the internet says about the Science, The Scientist, 19(14): 10


Ortega Priego, J. L. (2005), Análisis de sesiones de la web del Cindoc: una aproximación a la minería de uso web, El profesional de la información, 14(3): 190-198.

Ortega, J. L. (2005), Análisis de la investigación universitaria española a través de Mapas de la Ciencia en la Web: Una propuesta metodológica del Modelo de Espacios Vectoriales [Master degree dissertation], Madrid: Universidad Carlos III de Madrid

Ortega, J. L., Aguillo, I. F. (2005), A web map of the CSIC research centres: A comparative study of the Cosine and the Parson's correlation coefficient in a Colink analysis, 10th International Conference of the International Society for Scientometrics and Informetrics, Stockholm, Sweden


Ortega, J. L., Prieto, J. A., Arroyo, N., Pareja, V., Aguillo, I. (2005), Análisis de la persistencia y del estado de páginas web en los resultados de Google, 9ª Jornadas Españolas de Documentación. "Infogestión", Madrid

2004

Ortega Priego, J. L. (2004),
Análisis del Consumo de Información de una Revista Electrónica: Análisis de Ficheros Log de Cybermetrics, Revista Española de Documentación Científica, 27(4): 455-468

2003

Ortega Priego, J. L. (2003), A Vector Space Model as a methodological approach to the Triple Helix dimensionality: A comparative study of Biology and Biomedicine Centres of two European National Research Councils from a Webometric view, Scientometrics, 58(2): 429-443

2002

Valero, M., Ortega, J. L., Valenzuela, J. J. (2002), Catálogo y clasificación del Archivo de la Sociedad otorrinolaringológica Andaluza , Seminario Médico, 54(3): 35-52

2001

Ortega Priego, J. L. (2001), Análisis de referencias basado en un Modelo de Espacios Vectoriales: La investigación en Historia Contemporánea en Jaén en el periodo 1990-1995 , Revista Española de Documentación Científica, 24(4): 369-381