Dynamic design of a cube-shaped satellite excited by launch vibrations

The objective of this Final Project is the structural design of a small cube–shaped satellite. Its primary structure should endure all launching vibrations. To fulfil that objective, a 3D Model of the satellite and a dynamic analysis must be done. The satellite has been designed as a multipurpose platform, so it can satisfy all possible client requirements in order to put different payloads into orbit. To begin with, a general satellite with an arbitrary payload has been designed with the future intention to adapt the current design to each client if necessary. To address the problem the following procedure has been used. First, and with a multi–platform CAD/CAM/CAE commercial software suite called CATIA (Computer Aided Three–Dimensional Interactive Application) a Computer Aided Design Model must be designed. Later, once the parameterized model is created, the engineering simulation software (CAE) ANSYS will be used to study the structural behaviour of the satellite during launch. The scope of this project is to design a multipurpose satellite bus that satisfies the conditions of the ASAP Document (see Section 6.1). That is, a satellite which can withstand all inertial forces and loads during launch in the 0–100 Hz spectrum, with a correctly aligned center of gravity, small enough moments of inertia, and with its natural frequencies above a certain value for each axis. The bus must fulfil the specifications given by the corresponding launch vehicle1 manufacturer, so to choose the launch vehicle, a comparative study has been made between the different options evaluating reliability, availability of the information offered and payload requirements. Once this study has been carried out, the most restrictive launcher has been selected. This has been done in order to be able to use a wider range of LV.Fraile Izquierdo, S.; Pila Vigalondo, A. (2014). Dynamic design of a cube-shaped satellite excited by launch vibrations. Universitat Politècnica de València. http://hdl.handle.net/10251/50741Archivo delegad

A study of how children perceive the values transmitted by their grandparents

RESUMEN Las relaciones intergeneracionales que tienen lugar entre abuelos y nietos proporcionan una serie de beneficios para ambas partes, siendo el principal propósito de este estudio la transmisión de valores que los abuelos hacen a sus nietos. Para ello, este análisis se ha centrado en la percepción que tienen los niños de sus propios valores y de los valores que les transmiten sus abuelos. En su parte cuantitativa, esta investigación analiza el grado de transmisión de una serie de valores y la consideración de los más importantes para abuelos y nietos, teniéndose en cuenta variables como el género de ambos. El estudio cuenta con una muestra de 20 niños y 22 niñas de entre 9 y 12 años. Con su colaboración, se han observado diferencias entre los valores más importantes para abuelos y abuelas. También, han mostrado la importancia que tiene para ellos el valor de la felicidad y su correspondencia con los valores que creen que les transmiten sus abuelos con mayor empeño, felicidad y obediencia. La información cualitativa aborda los diferentes aprendizajes y enseñanzas que los abuelos transmiten a sus nietos, detallándose un gran número de principios morales como la bondad, ayuda mutua, respeto por la diversidad, etcétera y actividades que se realizan conjuntamente entre ambos entre las que destacan jugar y hacer los deberes. En definitiva, los diferentes valores y enseñanzas que los abuelos transmiten a sus nietos son de gran importancia ya que repercuten directamente en el pensamiento, comportamiento y motivaciones de los nietos.ABSTRACT The intergenerational relationships that take place between grandparents and grandchildren carry with them a series of benefits for both of them. This study has as its main purpose the analysis of the values that grandparents transfer to their grandchildren. For this matter, this analysis has focused on the perception that children have of their own values and the values transmitted to them by their grandparents. In this quantitative part, its research analyzes the degree of transmission that is made of a series of values and the importance that grandparents and grandchildren give to them, taking into account variables such as the gender of grandparents and grandchildren. The study has a sample of 20 boys and 22 girls between the ages of 9 and 12. With their help, we have been able to observe the differences between the most important values for grandfathers and those for grandmothers. Also, they have shown how important is the value of happiness for them and its correspondence with the values that they believe their grandparents transmit to them with greater effort, happiness and obedience. The qualitative information approaches the different learnings and teachings that grandparents transmit to their grandchildren, detailing a large number of moral principles, such as kindness, mutual help, respect for diversity, etc. and activities that are carried out by both of them, like playing and doing homework. In conclusion, the different values and teachings that grandparents transmit to their grandchildren are important because they directly affect the thinking, behavior and motivations of the grandchildren.Grado en Magisterio en Educación Primari

Diseño y ensayos en tierra de paneles solares para un satélite de órbita baja = Design and testing procedures of a Low Earth (LEO)satellite solar panels

El Proyecto Fin De Carrera presentado a continuación contiene una descripción del prediseño del microsatélite de observación terrestre Gaia, particularizando ésta especialmente en el sistema de potencia del mismo. En el presente capítulo se describen los objetivos de la misión expuesta y los requerimientos del satélite objeto de este proyecto

Disyunciones intercontinentales en briófitos : estudios sistemáticos y biogeográficos en Orthotricheae (Orthotrichaceae, Bryopsida)

Tesis Doctoral inédita leída en la Universidad Autónoma de Madrid, Facultad de Ciencias, Departamento de Biología. Fecha de lectura: 22-09-2017Esta tesis tiene embargado el acceso al texto completo hasta el 22-03-201

Earliest herbarium evidence for the occurrence of Lewinskya acuminata (Orthotrichaceae) in East Africa

This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Bryology on 23th September 2019, available online: http://www.tandfonline.com/10.1080/03736687.2019.1655871This research was supported by the Spanish Ministries of Science and Innovation (CGL2011-28857/BOS) and Economy and Competitiveness (CGL2016-80772-P

The long journey of Orthotrichum shevockii (Orthotrichaceae, Bryopsida): From California to Macaronesia

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Biogeography, systematics and taxonomy are complementary scientific disciplines. To understand a species' origin, migration routes, distribution and evolutionary history, it is first necessary to establish its taxonomic boundaries. Here, we use an integrative approach that takes advantage of complementary disciplines to resolve an intriguing scientific question. Populations of an unknown moss found in the Canary Islands (Tenerife Island) resembled two different Californian endemic species: Orthotrichum shevockii and O. kellmanii. To determine whether this moss belongs to either of these species and, if so, to explain its presence on this distant oceanic island, we combined the evaluation of morphological qualitative characters, statistical morphometric analyses of quantitative traits, and molecular phylogenetic inferences. Our results suggest that the two Californian mosses are conspecific, and that the Canarian populations belong to this putative species, with only one taxon thus involved. Orthotrichum shevockii (the priority name) is therefore recognized as a morphologically variable species that exhibits a transcontinental disjunction between western North America and the Canary Islands. Within its distribution range, the area of occupancy is limited, a notable feature among bryophytes at the intraspecific level. To explain this disjunction, divergence time and ancestral area estimation analyses are carried out and further support the hypothesis of a long-distance dispersal event from California to Tenerife IslandThis research was funded by the Spanish Ministry of Education and Science (CGL2007- 61389/BOS) to F.L., the Spanish Ministry of Science and Innovation (CGL2011-28857/BOS) to V.M., the Spanish Ministry of Economy and Competitiveness (CGL2013-43246-P) to R.G., and the Spanish Ministry of Economy, Industry and Competitiveness (CGL2016-80772-P) to I.D. and the Spanish Ministry of Economy and Competitiveness (grants IJCI-2014-19691 and RYC-2016-20506) to J.P. J.P. also received the H2020 Marie Skłodowska-Curie Actions grant 747238. J.M.G-M and A.L-L. are grateful for funding from Parque Nacional del Teide. B.V. benefited from the support of the Ministry of Economy and Competitiveness through grant BES2012-051976 of the Formación de Personal Investigador (FPI) programme. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscrip

Geographical structure, narrow species ranges, and Cenozoic diversification in a pantropical clade of epiphyllous leafy liverworts

The evolutionary history and classification of epiphyllous cryptogams are still poorly known. Leptolejeunea is a largely epiphyllous pantropical liverwort genus with about 25 species characterized by deeply bilobed underleaves, elliptic to narrowly obovate leaf lobes, the presence of ocelli, and vegetative reproduction by cladia. Sequences of three chloroplast regions (rbcL, trnL-F, psbA) and the nuclear ribosomal ITS region were obtained for 66 accessions of Leptolejeunea and six outgroup species to explore the phylogeny, divergence times, and ancestral areas of this genus. The phylogeny was estimated using maximum-likelihood and Bayesian inference approaches, and divergence times were estimated with a Bayesian relaxed clock method. Leptolejeunea likely originated in Asia or the Neotropics within a time interval from the Early Eocene to the Late Cretaceous (67.9 Ma, 95% highest posterior density [HPD]: 47.9-93.7). Diversification of the crown group initiated in the Eocene or early Oligocene (38.4 Ma, 95% HPD: 27.2-52.6). Most species clades were established in the Miocene. Leptolejeunea epiphylla and L. schiffneri originated in Asia and colonized African islands during the Plio-Pleistocene. Accessions of supposedly pantropical species are placed in different main clades. Several monophyletic morphospecies exhibit considerable sequence variation related to a geographical pattern. The clear geographic structure of the Leptolejeunea crown group points to evolutionary processes including rare long-distance dispersal and subsequent speciation. Leptolejeunea may have benefitted from the large-scale distribution of humid tropical angiosperm forests in the Eocene

New national and regional bryophyte records, 49

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