Comparando los fertilizantes nitrogenados para mejorar la eficiencia del nitrógeno en los sistemas de horticultura reduciendo la pérdida de lixiviación e incrementando la absorción de la planta

En esta investigación, diferentes fertilizantes nitrogenados fueron utilizados para determinar el efecto en la lixiviación de nitratos y en la absorción de las plantas a través de columnas de suelo. Los fertilizantes Nitrogenados se aplicaron a una dosis de 22.5 N kg ha-1 con cuatro diferentes tratamientos (i) control (sin fertilizante), (ii) fertilizante estándar, (iii) fertilizante de lenta liberación y (iv) fertilizante + inhibidor de la nitrificación (DMPP) Suelos arenosos se utilizaron para simular condiciones de campo en sistemas hortícolas.Perú. Programa Nacional de Becas y Crédito Educativo (Pronabec) : Beca Presidente de la RepúblicaTrabajo de investigació

Determinación de la vulnerabilidad del riesgo de contaminación de aguas subterráneas por la actividad del cultivo de flora en la zona de la cuenca del río Teusacá entre La Calera y la desembocadura al río Bogotá utilizando la metodología DRASTIC

Trabajo de InvestigaciónDebido a la saturación de sistemas de agua subterránea que se encuentran en los municipios de la Calera y Sopó, y la necesidad de agua para uso doméstico, industrial y urbanístico, se desarrolla un proyecto el cual determina y evalúa la vulnerabilidad del agua subterránea debido a los problemas de contaminación generados principalmente por la floricultura. La evaluación de la vulnerabilidad se realiza con la metodología DRASTIC, la cual involucra siete parámetros, los cuales dependen de las características físicas, geológicas e hidrogeológicas de los acuíferosINTRODUCCIÓN 1. GENERALIDADES 2. MARCO DE REFERENCIA 3. METODOLOGIA 4. DESARROLLO DEL PROYECTO 5. CONCLUSIONES 6. RECOMENDACIONES 7. BIBLIOGRAFÍA 8. ANEXOSPregradoIngeniero Civi

A prototype tool for the automatic generation of adaptive websites

This paper presents AWAC, a prototype CAWE tool for the automatic generation of adaptive Web applications based on the A-OOH methodology. A-OOH (Adaptive OO-H) is an extension of the OO-H approach to support the modeling of personalized Websites. A-OOH allows modeling the content, structure, presentation and personalization of a Web Application. The AWAC tool takes the A-OOH design models of the adaptive Website to generate as an input. Once generated, the adaptive Website also contains two modules for managing the personalization which, at runtime, analyze the user browsing events and adapt the Website according to the personalization rule(s) triggered. These personalization rules are specified in an independent file so they can be updated without modifying the rest of the application logic

Particle interaction with binary-fluid interfaces in the presence of wetting effects

In this paper, we present an Eulerian-Lagrangian methodology to simulate the interaction between a fluid-fluid interface and a solid particle in the presence of wetting effects. The target physical problem is represented by ternary phase systems in which a solid phase and a drop phase interact inside an incompressible Newtonian carrier fluid. The methodology is based on an Eulerian-Lagrangian approach that allows for the numerical solution of the Continuity and Navier-Stokes equations by using a pseudo-spectral method, whereas the drop phase is modelled by the Phase Field Method, in which a smooth transition layer represented by an hyperbolic function is considered both across the solid-fluid interface and across the drop-fluid interface. Finally, the solid phase is described in the form of a virtual force using the Direct Forcing Immersed Boundary approach. The properties of the immersed solid phase (including wetting effects), the deformability of the drops and the characteristics of the carrier fluid flow are the main controlling parameters. To simulate a ternary phase system, the solid phase is coupled to the binary-fluid phase by introducing a single well potential in the free-energy density functional, which can also control the solid surface wetting property. The capabilities of the methodology are proven by examining first 2D and 3D validation cases in which a solid particle is settling in a quiescent fluid. Then, the interaction of solid particles with a binary-fluid interface and the effects of surface wetting on the submergence of a quasi-buoyant body are discussed. Finally, the equilibrium configuration for a solid particle interacting with an equally-sized drop at different contact angles and the relative rotation of two solid particles bridged by a drop are examined in the case the interaction is induced by shear fluid flow deformations on the drop interface

Analysis and proposal of sustainable urban mobility: accessibility to the cultural heritage of the City of Guanajuato; Gto

[EN] Through this research and analysis, its intention is to restructure the corporate public transport road network of the Patrimonial city of Guanajuato, based on a systemic approach created by transfer centers and avoiding vehicular traffic. To make the historical center an available, safe, and fast space, with less environmental impact and friendly, we pretend to change the structure of the city. Mobility is a necessity in cities, but it is also a right; it occupies a central role in society while allowing communication, economic activity, and integrating spaces and events; It is needed for all people to access the essential goods and services of a dignified life. The method of analysis that considered is Urban Sustainability as a set of systems, which explains that anyone who presents a problem produces an imbalance in the rest. Therefore, the Urban Sustainability Index (ISU) should understand as a degree achieved by the city to maintain the balance of all systems present in urban life. The elements used were: historical analysis, photographic records, public transport routes, diagrams of vehicle flows, and previous drafts. Its scope changes road capacity and accessibility, quality of life, sustainability, economic, social viability, equity, and quality of the environment. This project is aimed at improving and developing the infrastructure with a set of economically profitable actions. It proposes that short and medium-term actions contribute to a longterm vision and strategyITESO, Departamento del Hábitat y Desarrollo Urbano, Ph. Andrés Salas Montoya, Fernando Sánchez-Castellanos IturbeColmenero Fonseca, F.; Cruz Ramírez, AC. (2020). Analysis and proposal of sustainable urban mobility: accessibility to the cultural heritage of the City of Guanajuato; Gto. VITRUVIO - International Journal of Architectural Technology and Sustainability. 5(1):17-35. https://doi.org/10.4995/vitruvio-ijats.2020.13254OJS173551Andrews-Phaedonos, F. , (2014) Specification and Use of Geopolymer Concrete, in: 9th Austroads Bridge Conference, Sydney, Australia.Arcos García, A., (2012) Transformación del paisaje patrimonial de la Ciudad de Guanajuato [Tesis doctoral]. Guanajuato: Universidad de Guanajuato.Attwell, C., (2014) Geopolymer concrete: a practical approach, Proceedings of the First International Conference on Construction Materials and Structures, Johannesburg, South Africa., pp. 466-474.Buchwald, A., (2012) ASCEM® cement - a contribution towards conserving primary resources and reducing the output of CO2, Cem. Intl. 10, pp. 86-97.Colmenero Fonseca, F., (2017) Conservación del paisaje Urbano en el Centro histórico de la Ciudad de Guanajuato (S XVI-S XXI). Revista científica de Arquitectura y Urbanismo, [S.l.], v. 38, n. 3, 100106, dec. 2017. ISSN 1815-5898.Disponible en: URL . (Fecha de Acceso: 26 Nov. 2019)Colmenero Fonseca, F., Parrinello, S., (2017) Study of the current patrimonial City: its environmental impact in the urban-architectural and landscape transformations. Revista científica edA Esempi di Architettura. International Research Center. EdA Issue 2017 | Vol. 2 ISBN Disponible en URL http://www.esempidiarchitettura.it/sito/ journal_pdf/PDF%202017/28.%20COLMENERO_PARRINELLO_ EdA%202017.pdf (Fecha de acceso: 26 nov. 2019)Cross, D. , Stephens, J. , Vollmer, J., (2005) Structural applications of 100 percent fly ash concrete, World of Coal Ash 2005, Lexington, KY (Paper 131).Cruz, R., (2018) El papel del transporte público colectivo en la movilidad sustentable en el centro histórico, Guanajuato, Gto. (1960-2017). [Tesis de licenciatura]. Guanajuato: Universidad de Guanajuato.Davidovits, J. (1994) Geopolymers: Man made rock geosynthesis and the resulting development of the very early strenght cement, J. Materials Education, vol. 16, no. 2&3, pp. 91-139Glasby, T., Day, J., Genrich, R., Aldred, J. (2015) EFC geopolymer concrete aircraft pavements at BrisbaneWestWellcamp Airport, Concrete 2015: 27th Biennial National Conference of the Concrete Institute of Australia in Conjunction With the 69th RILEM Week, Melbourne, Australia pp. 1051-1059.Hewlett, PC. , Liska, M., CEMFREE (2014) The development of nonPortland cement based concretes, ICT Yearbook 19 pp. 45-56.Husbands, T.B., Malone, P.G., Wakeley, L.D. (1994) Performance of Concretes Proportioned With Pyrament Blended Cement, Vicksburg, MS,106pp.INEGI, (2016) Instituto Nacional de Estadística y Geografía. Obtenido de Instituto Nacional de Estadística y Geografía: http://www3.inegi. org.mx/sistemas/mexicocifras/ISTA, (2009) Instituto Sindical de Trabajo, Ambiente y Salud. Estrategias de Movilidad Sustentable. CONURBA Disponible en: http://conurbamx.com/home/estrategias-de-movilidadsustentable/ (Fecha de acceso: 26 nov. 2019).Krivenko, P.V., (1994) Alkaline cements, in: PV Krivenko (Ed.), Proceedings of the First International Conference on Alkaline Cements and Concretes, pp. 11-129 Kiev,Ukraine.Little, D. N., Nair, S. (2009) Recommended parctice for stabilization of subgrade soils and base materials, Web-Only Document 144, NCHRP, Transportation Research BoardMaier, T. (2010) Soil stalilization method. USA. Patent 7845879McIntosh, A. , Lawther, S.E.M., Kwasny, J., Soutsos, M.N. (2015) D. Cleland, S. Nanukuttan, Selection and characterization of geological materials for use as geopolymer precursors, Adv. Appl. Ceram. 114. Pp. 378-385. https://doi.org/10.1179/1743676115Y.0000000055McLellan, B. C., Williams, R. P., Lay, J., Van Riessen, A., Corder, G. D. (2011). Costs and carbon emissions for geopolymer pastes in comparison to ordinary portland cement. Journal of cleaner production, 19(9-10), 1080-1090. https://doi.org/10.1016/j.jclepro.2011.02.010Mendoza Puga, L., Carrillo Barrón, A., Castellanos Mendoza, E., (2015) Capacidad y niveles de servicios viales de la calle Miguel Hidalgo. En A. Ruíz Lanuza, & E. Juárez Sandoval, De río a calle. Calle subterránea de Guanajuato. Guanajuato: Universidad de Guanajuato.ONU-HABITAT (2013) Planificación y diseño de una movilidad sostenible: orientaciones parapolíticas públicas. Informe mundial sobre asentamientos humanos 2013.Ozyildirim, C. (1994) A Field Investigation of Concrete Patches Containing Pyrament Blended Cement, Richmond, VA, 11pp.Patel, R., Kinney, F., Schumacher, G. (2012) Green concrete using 100% fly ash based hydraulic binder, 2012 International Concrete Sustainability Conference, Seattle, WA, (14 pp).Provis, J.L., Brice, D.G., Buchwald, A. , Duxson, P. , Kavalerova, E., Krivenko, P.V. , Shi, C., Van Deventer, J.S.J. , JALM, Wiercx (2014) Demonstration projects and applications in building and civil infrastructure, in: JL Provis, JSJ van Deventer (Eds.), Alkali-Activated Materials: State-of-the-Art Report, RILEM TC 224-AAM, Springer/ RILEM, Dordrecht, pp. 309-338. https://doi.org/10.1007/978-94-007-7672-2_11Shi, C., Krivenko, P.V., Roy, D.M. (2006) Alkali-activated Cements and Concretes, Taylor & Francis, Abingdon, UK. https://doi.org/10.4324/9780203390672Sonafrank, C. (2010) Investigating 21st Century Cement Production in Interior Alaska Using Alaskan Resources, Fairbanks, AK, pp. 114 Van Deventer JSJ, Provis JL, Duxson P. , (2012) Technical and commercial progress in the adoption of geopolymer cement, Miner. Eng. 29pp. 89-104.Van Deventer, J.S.J. (2015), Is the market ready for the adoption of alkali-activated cements? Innovation in Buildings and Construction - Energy, Efficiency, Emissions,Melbourne, Australia.Vasconcelos E.A. de, (2010) Análisis de la movilidad urbana. Espacio, medio ambiente y equidad. [en línea], [Consulta: 12 marzo 2016]. Disponible en: URL http://www.scioteca.caf.com/ handle/123456789/414Wilkins, B. (2013) Is the grey stuff really 'green'? Build. Africa.pp. 13-16

First report of Staphylococcus isolates identified by genomic analysis from rhizospheric soils of Capsicum annuum L. cv Piquillo

The genus Staphylococcus comprises many species which can be isolated from many sources and could display plant growth-promoting properties. Moreover, Capsicum species are important export crops in Peru, which have gained greater interest in recent years. Therefore, the objective of this research was to identify Staphylococcus isolates from rhizospheric soil samples of C. annuum cv. Piquillo in La Libertad, Peru. Bacterial isolates were identified by genomic analysis targeting the 16s rRNA gene. Bacteria were isolated from samples by serial dilutions and cultured in solid medium agar plates. Then, genomic DNA extraction from pure and morphologically distinct isolates, 16s rRNA gene amplification, sequencing and bioinformatic analysis were performed. We found four bacterial isolates from the genus Staphylococcus not previously reported in C. annuum rhizospheric soils: Isolate Ca2 and Ca5 which both match to Staphylococcus sp., isolate Ca6 to Staphylococcus arlettae and isolate Ca7 to Staphylococcus xylosus. Further studies to assess these isolates’ impact on crops as well as their potential applications in other fields of research such as antimicrobial development, food processing and pesticide biodegradation are recommended.The genus Staphylococcus comprises many species which can be isolated from many sources and could display plant growth-promoting properties. Moreover, Capsicum species are important export crops in Peru, which have gained greater interest in recent years. Therefore, the objective of this research was to identify Staphylococcus isolates from rhizospheric soil samples of C. annuum cv. Piquillo in La Libertad, Peru. Bacterial isolates were identified by genomic analysis targeting the 16s rRNA gene. Bacteria were isolated from samples by serial dilutions and cultured in solid medium agar plates. Then, genomic DNA extraction from pure and morphologically distinct isolates, 16s rRNA gene amplification, sequencing and bioinformatic analysis were performed. We found four bacterial isolates from the genus Staphylococcus not previously reported in C. annuum rhizospheric soils: Isolate Ca2 and Ca5 which both match to Staphylococcus sp., isolate Ca6 to Staphylococcus arlettae and isolate Ca7 to Staphylococcus xylosus. Further studies to assess these isolates’ impact on crops as well as their potential applications in other fields of research such as antimicrobial development, food processing and pesticide biodegradation are recommended

Diseño de mini acueducto por bombeo eléctrico en la ciudad de los arados del municipio de Palacaguina, departamento de Madriz

Presenta el diseño de mini acueducto por bombeo eléctrico en la ciudad de los arados del municipio de Palacaguina, departamento de Madriz en el cual se realizó un estudio socioeconómico de la situación actual de la población así como las consideraciones de los análisis físicos químicos y bacteriológicos de la fuente de abastecimiento con el objetivo de garantizar que el agua suministrada es apta para consumo humano