Use of sun gear orbits to obtain the load sharing in planetary transmissions and its impact in the tooth load

The present work assesses the possibility of using the orbits described by the sun gear in order to analyse the load sharing ratio in planetary gear transmissions. Furthermore, the current work is extended to observe the impact of the floatability and different tangential pinhole position errors in the load borne in a single contact between a pair of teeth in comparison to the load per planet. Therefore, it highlights the inaccuracy of the load sharing ratio (LSR) as an indicator of the overload in one tooth of the planet. Moreover, the use of the orbits represented with respect to a rotating reference provides helpful information to determine the overloads and underloads in the planets due to the existence of a tangential error in sequentially phased transmissions. Therefore, this proposal provides a simpler solution to the measurement of the LSR in planetary transmissions with different numbers of planets than the use of strain gauges.The authors would like to acknowledge Project DPI2017-85390-P funded by the Spanish Ministry of Economy, Industry, and Competitiveness for supporting this research. Moreover, the authors acknowledge the Project PID2020-116213RB-I00 funded by the Ministry of Science and Innovation

Molecular dynamics simulations of the role of salinity and temperature on the hydrocarbon/water interfacial tension

Interfacial tension of some hydrocarbon/water systems, including a mixture of aliphatic and aromatic hydrocarbons, has been estimated on the basis of molecular dynamics simulations. The dependence of the interfacial properties on the salinity of the aqueous phase and the temperature has been simulated. Different concentrations in NaCl and CaCl2 up to 2 M have been used. It is found that, in all considered cases, interfacial tension increases with salt concentration. This effect depends on the preference of the salt ions for the bulk of the aqueous phase that, in turns, results in an increased difficulty for the water molecules to be at the interface. The influence of salinity is fundamentally electrostatic in origin and does not depends on the chemical nature of the salt cation. Finally, the impact of temperature on the dodecane/brine interfacial tension has also been inspected. A decreasing of the values of the interfacial tension is found in agreement, both in trend and magnitude, with experimental available dat

Multicomponent magnetic nanoparticle engineering: the role of structure-property relationship in advanced applications

Combining magnetic nanomaterials with materials of other classes can produce multicomponent nanoparticles with an entire ensemble of new structures and unique, enhanced, synergetic, and/or complementary functionalities. Here we discuss the most recent developments in the synthesis of multicomponent magnetic nanoparticles, describe the resulting structures and their novel properties, and explore their application in a variety of fields, including multimodal imaging, nanomedicine, sensing, surface-enhanced Raman scattering, and heterogeneous catalysis. The current synthetic methods (usu-ally bottom-up approaches) of multicomponent nanoparticles can produce a number of tailored mor-phologies (core@shell, yolk-shell, core-satellite, Janus, nanochains, anisotropic, etc.), making them invaluable for applications in biology, medicine, chemistry, physics, and engineering. But like any new technology, their synthesis methods need to be optimized to be simple, scalable, and as environmentally friendly as possible before they can be widely adopted. In particular, the use of life cycle assessment (LCA) to guide future works toward environmental sustainability is highlighted. Overall, this review not only presents a critical and timely summary of the state-of-the-art of this burgeoning field in both fundamental and applied nanotechnology, but also addresses the challenges associated with under-standing the particular structure-property relationships of multicomponent magnetic nanoparticles.The authors thank funding from the Spanish State Research Agency (AEI) through the project PID2019-106099RB-C43/AEI/10.13039/501100011033 and from the Basque Government Industry and Education Department under the ELKARTEK, HAZITEK and PIBA (PIBA-2018-06) programs, respectively

Propuesta de implementación de un modelo de mantenimiento basado en condición para equipos de aire acondicionado en sucursales bancarias de Norte de Santander.

Mediante el presente trabajo se busca presentar la aplicación de un programa de mantenimiento basado en condición en calidad de corrientes y la condición del activo, el plan fue desarrollado para ser aplicado a sucursales bancarias en el departamento de Norte de Santander exactamente en su capital Cúcuta, donde se presenta serios problemas con el confort térmico debido a que la ciudad tiene unas condiciones agrestes por las altas temperaturas, igualmente se diseñan formatos y alertas que se emiten teniendo en cuenta el análisis de la inspección, se plantea para que sea efectuada en ciclos mensuales, se establecen tiempos predeterminados para resolver el inconveniente prediciendo la falla que se puede presentar. Estas sucursales bancarias no pueden perder su confort térmico ya que su nodo informático sale del sistema y esto afecta gravemente la disponibilidad de la plataforma del banco impidiendo o generando el no uso de esta lo que se traduce en pérdida de dinero, con el fin de mejorar los indicadores de disponibilidad y confiabilidad de los equipos de la sucursal para evitar sus paradas imprevistas.At work we can see an application of a predictive maintenance program based on current quality and its condition of the equipment, the plan was thinking as an application to bank branches in the department of Norte de Santander exactly in its capital Cucuta, where it is presented serious Problems with thermal comfort due to the fact that the city has very rough conditions due to the hot weather, and also formats and alerts that are given depending on the analysis of the inspection that is done monthly according to the plan, and are determined a few times to solve the problem by predicting the failure that is going to occur because these bank branches cannot lose their thermal comfort as their computer node would leave the system which seriously affects the availability of the bank platform by preventing or generating the use of this which results in the loss of money, in order to improve the indicator It is about the availability and reliability of branch equipment to avoid unexpected stops.1. Título de la investigación 10 2. Problema de investigación 11 2.1 Descripción del problema 11 2.2 Planteamiento del problema 12 2.3 Sistematización del Problema 12 3. Objetivos 12 3.1 Objetivo general 12 3.2 Objetivos específicos 12 4. Justificación y delimitación de la investigación 13 4.1 Justificación 13 4.2 Delimitación 14 4.3. Limitaciones 15 5. Marco Conceptual 15 5.1 Estado del arte 15 5.1.1 Estado del arte Escala local 15 5.1.2 Estado del arte Nacional 18 5.1.3 Estado del arte Escala internacional 20 5.2 Marco teórico 22 5.2.1 Generalidades del mantenimiento 22 5.2.2 Definición del Análisis de Criticidad. 23 5.2.3 Generalidades 24 5.2.4 Tipos de mantenimiento 26 5.2.5 Mantenimiento centrado en confiabilidad 28 5.2.6 Mantenimiento Basado en condición 28 5.2.7 Generalidades del aire acondicionado 30 5.2.8 Componentes que tiene un aire acondicionado sencillo 31 5.3 MARCO NORMATIVO O LEGAL 31 6. Marco Metodológico 33 6.1 Recolección de la información 33 6.1.1 Tipo de investigación 33 6.1.2 Fuentes de Obtención de la Información 33 6.1.2.1 Fuentes de información primarias 33 6.1.2.2 Fuentes de información Secundarias 34 6.1.3. Herramientas 34 6.1.4 Metodología 34 6.1.5 Recopilación de la información 35 6.2 Análisis de la información 39 6.3 Propuesta De Solución 43 7. Resultados 45 7.1 Resultados Esperados 46 8. Análisis Financiero 46 8.1 Costos financieros Del Proyecto 46 9. Conclusiones y Recomendaciones 47 9.1 Conclusiones 47 9.2 Recomendaciones 48 Bibliografía 49EspecializaciónEspecialista en Gerencia de MantenimientoEspecialización en Gerencia de Mantenimient

Removing lead from water with carboxylate dendrimers and magnetic nanoparticles modified with carboxylate dendrimers

Contamination of water with heavy metals as lead (Pb2+) is a relevant problematic issue. In this work, we have tested diferent types of dendritic materials for lead removal from water and further recovery. The systems employed are magnetic nanoparticles (MNP) modifed with monocarboxylate and dendritic carboxylate ligands, and they are compared to pristine MNP and carbosilane dendrimers. They are all efective at removing Pb2+, but the key variations are in their recyclability. The usage of a fltering membrane was required for dendrimers, which was signifcantly degraded by the acidic media. In terms of MNP, those that were covered by dendritic molecules were clearly less damaged in acidic media. Finally, isotherm analysis revealed that Pb2+ interacts diferently with unmodifed and modifed MNP.Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER¿BBN)Ministerio de Ciencia e InnovaciónComunidad de MadridUniversidad de Alcal

Colonisatoin of Pinus halepensis roots by Pseudomonas fluorescens and interaction with the ectomycorrhizal fungus Suillus granulatus

8 pages, figures, and tables statistics.Colonisation of Pinus halepensis roots by GFP-tagged Pseudomonas fluorescens Aur6 was monitored by epifluorescence microscopy and dilution plating. Aur6-GFP was able to colonise and proliferate on P. halepensis roots. Co-inoculation with the ectomycorrhizal fungus Suillus granulatus did not affect the bacterial colonisation pattern whereas it had an effect on bacterial density. Bacterial counts increased during the first 20 days of seedling growth, irrespective of seedlings being mycorrhizal or not. After 40 days, bacterial density significantly decreased and bacteria concentrated on the upper two-thirds of the pine root. The presence of S. granulatus significantly stimulated survival of bacteria in the root elongation zone where fungal colonisation was higher. The number of mycorrhizas formed by S. granulatus was not affected by co-inoculation with Aur6-GFP. Neither Aur6-GFP nor S. granulatus stimulated P. halepensis development when inoculated alone, but a synergistic effect was observed on seedling growth when bacteria and fungus were co-inoculated.Peer reviewe

Nanoprogrammed Cross-Kingdom Communication Between Living Microorganisms

[EN] The engineering of chemical communication at the micro/nanoscale is a key emergent topic in micro/nanotechnology, synthetic biology, and related areas. However, the field is still in its infancy; previous advances, although scarce, have mainly focused on communication between abiotic micro/nanosystems or between microvesicles and living cells. Here, we have implemented a nanoprogrammed cross-kingdom communication involving two different microorganisms and tailor-made nanodevices acting as "nanotranslators". Information flows from the sender cells (bacteria) to the nanodevice and from the nanodevice to receiver cells (yeasts) in a hierarchical way, allowing communication between two microorganisms that otherwise would not interact.B.d.L. is grateful to the Spanish Government for her FPU Ph.D. fellowship. The authors wish to thank the Spanish Government (projects RTI2018-100910-B-C41 and RTI2018101599-B-C22 (MCUI/FEDER, EU)) and the Generalitat Valenciana (project PROMETEO 2018/024) for support. Part of this work was included in the Ph.D. thesis of B.d.L.De Luis-Fernández, B.; Morella-Aucejo, Á.; Llopis-Lorente, A.; Martínez-Latorre, J.; Sancenón Galarza, F.; López Del Rincón, C.; Murguía, JR.... (2022). Nanoprogrammed Cross-Kingdom Communication Between Living Microorganisms. Nano Letters. 22(5):1836-1844. https://doi.org/10.1021/acs.nanolett.1c024351836184422

Simulador de cirugía cardiotorácica

La invención se refiere a un simulador de cirugía cardiotorácica que comprende: -un bloque cardiopulmonar, con un corazón y unos pulmones inertes; y,- un circuito hidráulico cerrado para reproducir una parte de un sistema cardiovascular, con un depósito de fluido en conexión fluida con un elemento de bombeo configurado para producir un flujo continuo de dicho fluido desde el depósito hacia dos circuitos:- un circuito principal que atraviesa el bloque cardiopulmonar con un primer elemento de control de flujo aguas arriba del bloque cardiopulmonar y un segundo elemento de control de flujo aguas abajo del bloque cardiopulmonar, retornando este primer circuito principal al depósito de fluido aguas abajo del segundo elemento de control de flujo;- un circuito auxiliar, paralelo al circuito principal con retorno al depósito de fluido y que comprende un tercer elemento de control de flujo; comprendiendo el simulador de cirugía cardiotorácica además medios de control configurados:- para actuar alternativamente sobre el primer elemento de control de flujo y el tercer elemento de control de flujo produciendo un flujo alternante de fluido entre el circuito principal y el circuito auxiliar; y- para actuar desfasadamente sobre el primer elemento de control de flujo y sobre el segundo elemento de control de flujo produciendo un pulso de presión dentro del bloque cardiopulmonar; de forma que se produce un flujo pulsátil del fluido a través del bloque cardiopulmonar.Solicitud: 201930264 (25.03.2019)Nº Pub. de Solicitud: ES2784447A1 (25.09.2020)Nº de Patente: ES2784447B2 (06.07.2021