Symplectic topology of b-symplectic manifolds

A Poisson manifold (M2n; ) is b-symplectic if Vn is transverse to the zero section. In this paper we apply techniques of Symplectic Topology to address global questions pertaining to b-symplectic manifolds. The main results provide constructions of: b-symplectic submanifolds a la Donaldson, b-symplectic structures on open manifolds by Gromov's h-principle, and of b-symplectic manifolds with a prescribed singular locus, by means of surgeries.Preprin

The valuation of intangibles process from the cost method : a study case for the Know How

ABSTARCT: One of the greatest challenges, at the start of the 21st century, is to quantify assets in transfer of knowledge processes generating a value in organizations; therefore it is important to recognize different valuation of intangibles proposals that are having a positive impact in enterprises competitiveness and sustainability. This being so, the main objective of this study is to identify the primary methodologies of valuation of intangibles assets and applying a Know How valuation methodology. To this end, a blend between documentary research and cost method was used as a methodological resource. It is obtained in the results that referring to valuation of intangibles, the most used methods in the academic and corporate field are as follows: cost, market and revenue value, being the cost method the ideal when quantifying this kind of intangible assets affecting an organization

Structural mechanical simulation to optimize the sensor arm geometry to be implemented on cranial remodeling orthosis

For the treatment of moderate and severe cases of deformational plagiocephaly, an asymmetrical deformation of the skull, a cranial remodeling orthosis (CRO) is used. For the development of a new CRO concept, a pressure sensor grid is placed inside the orthosis that will allow the monitoring of excessive pressures and incorrect CRO positioning throughout the treatment. To implement the sensor grid in the CRO, high mobility of the sensor arms structure that joins the several sensors of this grid is required, however, it is intended that this procedure does not damage the printed copper tracks on the sensor structure. In this study, computer simulations were performed to optimize the sensor arm structure geometry, minimizing undesirable mechanical behavior in the sensor structure when subjected to tensile forces and displacements applied during its placement in the CRO. It was observed that the different sensor arm structures geometries have different effects on the mechanical behavior of the sensor structure when subjected to tensile forces and tensile displacement. The zigzag curve geometry presents the best performance based on high mobility without intense strain on the structure that could damage the printed copper tracks.511F-603F-4B30 | Francisco MirandaN/

Design and construction of a hybrid system of heating air by combustion of biomass and solar radiation, using phase change material (PCM) as a source of thermal storage, for cassava drying

Este estudio consistió en el diseño, la construcción y la validación de un sistema híbrido de calentamiento de aire por combustión de biomasa y radiación solar, utilizando material de cambio de fase (PCM) como fuente de almacenamiento térmico, para el secado de yuca, a pequeña escala. El sistema híbrido consta de un ventilador centrífugo, dos colectores solares, un quemador de combustible sólido (cascarilla de arroz) y un secador de bandejas. La validación del sistema se realizó secando yuca. El PCM permitió seguir el proceso de secado, incluso cuando la radiación solar estuvo por debajo de 116,22 ± 31,94 W/m2, logrando mantener temperaturas de aire de secado en los dos colectores solares a 46 ±4 ,29°C y 51± 4,08°C durante 45 min adicionales. El tiempo de secado fue de 10 h y 45 min, la eficiencia de los colectores solares fue 43,91% y la del quemador de cascarilla de arroz de 36,72%.This study consisted of designing, building and validation a hybrid system of heating air by combustion of biomass and solar radiation, using phase change material (PCM) as a thermal storage source, for cassava drying, a small scale. The dryer consists of a centrifugal fan, two solar collectors, a fuel burner solid (rice husk) and a tray dryer. System validation was performed drying up Yucca. The PCM allowed to follow the drying process, even when the solar radiation was below 116,22 ± 31,94 W / m2, being able to maintain drying air temperatures in the two solar collectors at 46 ± 4, 29 ° C and 51 ± 4.08 ° C for an additional 45 min. The drying time was 10 h and 45 min, the efficiency of the solar collectors was 43.91 % and the rice husk burner of 36.72 %

Mercadotecnia y comercialización en las pymes productoras de alimentos y bebidas artesanales en Mexicali

In today’s society, creativity and necessity lead to thecreation of SMEs that operate in different economic sectors. This entrepreneurial opportunity is reflected in thepopulation of Mexicali, Baja California, Mexico, whichtakes advantage of the production of the primary sector,transforming raw materials into finished products to market for the consumption of the same community and tourists. This research has the objective of identifying theway in which SMEs producing artisanal foods use themarketing activities at the actual time of commercialize. The applied methodology had a non-experimental,quantitative, transversal and descriptive design. The result obtained through the instrument found that more thanhalf of entrepreneurs have knowledge in marketing tools,however, it is not the same proportion that uses thesetools in the commercialization of their products.En la sociedad actual, la creatividad y la necesidad llevan a detonar la creación de pymes que operan en diferentes sectores económicos. Esta oportunidad de emprendimiento se refleja en la población de Mexicali, BajaCalifornia, la cual aprovecha la producción del sectorprimario, transformando la materia prima en un productoterminado que comercializan y que sirve al consumo dela comunidad y del turismo en general. Estas oportunidades de emprendimiento llevaron a realizar esta investigación, la cual tiene por objetivo identificar como las pymesproductoras de alimentos artesanales utilizan las actividades de mercadotecnia al momento de comercializar. Lametodología aplicada tuvo un diseño no experimental,cuantitativo, transversal y descriptivo, utilizando un instrumento que generó resultados donde se puede encontrarque por poco más de la mitad de los empresarios tienenconocimiento en herramientas mercadológicas pero menos de esa mitad utiliza herramientas de mercadotecniaen la comercialización de sus productos

Atmospheric pollution: brief review of the situation in Portugal and the impacts on public health

A necessidade de implementação de ações de mitigação de emissões de poluentes atmosféricos e de redução de concentrações de poluentes para a população e meio envolvente requer uma análise temporal da evolução de emissões, concentrações e indicadores representativos de efeitos na saúde potencialmente associados à poluição atmosférica. Foi possível realizar uma análise comparativa entre 2009 e 2015 considerando a distribuição geográfica no território continental português, abordando: as emissões de poluentes óxidos de azoto (NOx), óxidos de enxofre (SOx), metano (CH4 ), dióxido de carbono (CO2 ), amoníaco (NH3 ), partículas suspensas no ar com diâmetro aerodinâmico inferior a 10 μm (PM10), partículas suspensas no ar com diâmetro aerodinâmico inferior a 2.5 μm (PM2.5); as concentrações médias anuais dos principais poluentes SO2 , NO2 , ozono (O3 ), PM10 e PM2.5; e indicadores de saúde pública (número de mortes por causa definida, potencialmente associada à poluição atmosférica). Relativamente aos efeitos na saúde, observaram-se diferentes tendências em cada causa de morte associada, e identificaram-se as regiões Norte, Centro e Lisboa como as mais afetadas. As diferenças registadas podem ser analisadas como evidências de existências de fatores externos que condicionam e determinam as variações do número de mortes registado de ano para ano nas diferentes regiões.The need to implement actions to mitigate emissions of atmospheric pollutants and to reduce concentrations of pollutants to the population and the environment requires a temporal analysis of the evolution of emissions, concentrations and indicators representing health ef fects potentially associated with air pollution. It was possible to carr y out a comparative analysis between 2009 and 2015 considering the geographical distribution in the Por tuguese mainland, addressing pollutant emissions nitrogen oxides (NOx), sulphur oxides (SOx), methane (CH4 ), carbon dioxide (CO2 ), ammonia (NH3 ), inhalable coarse par ticles with a diameter of 10 μm or less (PM10), fine par ticles with a diameter of 2.5 μm or less (PM2.5), the annual average concentrations of the main pollutants (SO2 , NO2 , O3 , PM10, PM2.5); and public health indicators (number of deaths due to defined cause, potentially associated with air pollution). Regarding the health ef fects, it was obser ved that dif ferent trends are presented in each associated cause of death, being able to identif y the zones of Nor th, Center and Lisbon as the most af fected in these causes of death. The dif ferences recorded can be analy zed as evidence of existences of ex ternal factors that determine the variations in the number of deaths recorded from year to year in dif ferent regions.Projeto financiado pelo FEDER-COMPETE e pela Fundação para a Ciência e Tecnologia (POCI-01-0145-FEDER-016752), (P2020-PTDC/AAG-MAA/2569/2014) “FUTURAR - Qualidade do Ar em Portugal em 2030 - apoio à decisão política”.info:eu-repo/semantics/publishedVersio

Importancia del Tratamiento Jurídico de las Criptomonedas en Nicaragua

En esta investigación se abordó el tema de la importancia del tratamiento jurídico de las criptomonedas en Nicaragua, debido a que el país no posee una regulación específica de criptoactivos, que permita a los usuarios de esta tecnología, acceder a la justicia para hacer valer sus Derechos o resolver conflictos que surjan de las relaciones contractuales cuyo objeto sean las criptodivisas. Por ello se planteó como objetivo principal: analizar la importancia del tratamiento jurídico de la nueva tecnología de las criptomonedas. Y para dar cumplimiento a este objetivo y respuesta al problema descrito, se utilizó una metodología con enfoque cualitativo, de alcance exploratorio, utilizándose como instrumento el análisis documental y la entrevista semiestructurada escogida por ser la más idónea debido a su naturaleza flexible y abierta. De las entrevistas realizadas y de la revisión de fuentes primarias y secundarias de documentación académica y bibliográfica, se obtuvieron como resultados, que la cuarta revolución industrial no es ajena al Derecho, que trae consigo tecnologías disruptivas como las criptomonedas, que son un tipo de activos digital o valor de unidad virtual, transferibles e intangibles, basadas en un sistema criptográfico, cuyo uso y regulación representa ventajas como los bajos costos de transacción, mayores fuentes de inversión, seguridad informática, mejora la calidad de los servicios públicos, por otra parte las desventajas entre ellas su volatilidad, si los usuarios no están lo suficiente educados sobre esta tecnología, pueden ser víctima de estafadores. Es a partir del análisis y discusión de resultados que se concluyó que es importante el tratamiento jurídico de las criptomonedas en cada uno de sus usos, y es importante empezar a trabajar desde ya en este tema que es el presente y futuro de la economía, de la manera de hacer negocios, de realizar contratos eficaces con bajos costos. Y sobre todo proteger a las personas que hagan uso de este activo virtual. Así como aprovechar estos sistemas en la administración de justicia. Palabras claves: criptomonedas, tecnología, regular, avances, revolució