Letter From the Editor

Welcome to Volume 8, Issue 2 of the Journal. In this issue, the authors address three very diverse topics of national and international significance: the liability of internet service providers for copyright infringement, the taxation of e-commerce, and the applicability of the fair use doctrine to instant messaging software. Each of these topics deals with issues that can, and ultimately will, have widespread effects on the use and growth of the Internet

Análisis bibliométrico de la Revista Colombiana de Ciencia Animal – RECIA 2009-2018. Indicadores de producción

Objective. Perform a bibliometric analysis of the scientific production published in the Colombian Journal of Animal Science 2009-2018. Materials and methods. A descriptive-retrospective bibliometric study was carried out including the articles published in the last 10 years of the journal. Bibliometric indicators were selected as chronological distribution, scientific production, growth index, thematic categorization, author productivity, co-authorship and institutional cooperation. The scientometric indicators were calculated using the Harzing's Publish or Perish 6 software, based on the Google Scholar. Results. 379 scientific articles were evaluated and an average of 16.48 articles / volume was published. The weighted productivity was 0.39 articles / author; the H-index was 13; the g-index was 18; the normalized hi was 8 and the annual h1 was 0.89. There was an increase in international contributions with predominance of original articles. Conclusions. Publishing a greater number of articles in English would be an opportunity to improve the visibility of the journal. The specific indicators of the journal were shown taking into account their visibility and productivity offered by the Publish or Perish program.Objetivo. Realizar un análisis bibliométrico de la producción científica publicada en la Revista Colombiana de Ciencia Animal 2009-2018. Materiales y métodos. Se realizó un estudio bibliométrico descriptivo-retrospectivo incluyendo los artículos publicados en los últimos 10 años de la revista. Se seleccionaron indicadores bibliométricos como distribución cronológica, producción científica, índice de crecimiento, categorización temática, productividad de autores, coautoría y cooperación institucional. Se calcularon los indicadores cienciométricos mediante el software Harzing's Publish or Perish 6, tomando como base de datos el Google Académico. Resultados. Fueron evaluados 379 artículos científicos y  se publicó un promedio de 16.48 artículos/volumen. La productividad ponderada fue de 0.39 artículos/autor; el H-index fue 13; el g-index fue de 18; el hi normalizado fue de 8 y el h1 anual fue de 0.89. Se evidenció un incremento en las contribuciones internacionales con  predominio de los artículos originales. Conclusiones. Publicar un mayor número de  artículos en inglés constituiría una oportunidad de mejorar la visibilidad de la revista. Se mostraron los indicadores específicos de la revista teniendo en cuenta su visibilidad y productividad ofrecidos por el programa Publish or Perish

Quantitative analysis of dribble volumes and rates using three-dimensional reconstruction of X-ray and diffused back-illumination images of diesel sprays

[EN] Post-injection fuel dribble is known to lead to incomplete atomisation and combustion due to the release of slow-moving, and often surface-bound, liquid fuel after the end of injection. This can have a negative effect on engine emissions, performance and injector durability. To better quantify this phenomenon, we developed an image-processing approach to measure the volume of ligaments produced during the end of injection. We applied our processing approach to an Engine Combustion Network 'Spray B' 3-hole injector, using datasets from 220 injections generated by different research groups, to decouple the effect of gas temperature and pressure on the fuel dribble process. High-speed X-ray phase-contrast images obtained at room temperature conditions (297 K) at the Advanced Photon Source at Argonne National Laboratory, together with diffused back-illumination images captured at a wide range of temperature conditions (293-900 K) by CMT Motores Termicos were analysed and compared quantitatively. We found a good agreement between image sets obtained by Argonne National Laboratory and CMT Motores Termicos using different imaging techniques. The maximum dribble volume within the field of view of the imaging system and the mean rate of fuel dribble were considered as characteristic parameters of the fuel dribble process. Analysis showed that the absolute mean dribble rate increases with temperature when injection pressure is higher than 1000 bar and slightly decreases at high injection pressures (>500 bar) when temperature is close to 293 K. Larger maximum volumes of the fuel dribble were observed at lower gas temperatures (similar to 473 K) and low gas pressures (<30 bar), with a slight dependence on injection pressure.The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: The image processing research was supported by the United Kingdom's Engineering and Physical Science Research Council (Grants EP/K020528/1 and EP/M009424/1) and BP Formulated Products Technology. The X-ray measurements were performed at the Advanced Photon Source at Argonne National Laboratory. Use of the Advanced Photon Source (APS) is supported by the U.S. Department of Energy (DOE) under Contract No. DEAC02-06CH11357. The X-ray component of this research was partially funded by DOE's Vehicle Technologies Program, Office of Energy Efficiency and Renewable Energy.Sechenyh, V.; Duke, DJ.; Swantek, AB.; Matusik, KE.; Kastengren, AL.; Powell, CF.; Viera, A.... (2020). 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