Curvas de Amplitud Constante

Treball de Fi de Màster Universitari en Matemàtica Computacional (Pla de 2013). Codi: SIQ527. Curs 2017/2018 (A distància)En el presente trabajo de final de master se realiza el estudio de las curvas de amplitud constante y se estudiará este tipo de curvas como curvas de Bézier racionales, que son el lenguaje utilizado en el Diseño Geométrico Asistido por Ordenador

Reviewing the knowledge on the genus Patella in the Mediterranean Sea: testing the effect of protection on the mean abundance and size of Patella ferruginea

Increasing human pressure has strongly impacted the littoral environment, altering the habitats and population parameters of some species. The Mediterranean Sea is one of the regions that have been highly affected by these events. In response to these events, marine protected areas (MPAs) have emerged as one of the main conservation tools for marine habitats and species. In this regard, harvesting of limpets (Patella spp.) is a good example of the impact of human activity on the coast. Limpets are mollusks that are collected as food or fishing bait, and their exploitation causes an immediate decrease in the density and size structure of individuals. In the Mediterranean Sea, the genus Patella is represented by five species: Patella rustica, P. caerulea, P. ulyssiponensis, P. ferruginea, and P. depressa. To verify the effectiveness of the MPAs, a deep review of 75 studies on Patella spp. in the Mediterranean Sea was conducted to analyze the spatial and temporal distribution of studies. Data extracted from these articles were used to assess the effect of protection on the density and size of P. ferruginea. Regarding spatial distribution, the studies reviewed were performed at 67 sites in 13 countries, of which 23 were in MPAs and 44 in non-protected or control areas. The findings of this study show that P. ferruginea is the species most studied, because it is one of the most threatened marine invertebrates in the Mediterranean Sea. This explains the temporal distribution of the studies, which coincides with the establishment of the conservation status and the concern about the population status of P. ferruginea. Analysis of the effect of protection on the density and mean size of P. ferruginea individuals revealed no significant difference in mean density between the control sites and MPAs. However, mean size between individuals was significantly higher in MPAs than control sites. This pattern may be related to intra- and interspecific competition between individuals

The trade mark in comercial traffic

RESUMEN: En la actualidad, las marcas juegan una función fundamental en el mercado tan grande y globalizado en el que nos encontramos, puesto que su función principal es la de distinguir los distintos productos y servicios ofrecidos en el mercado. Debido al rápido crecimiento del tráfico económico, la evolución en la última década y la propensión al consumo, como resultado de esta globalización aparece la obligación de crear un criterio de distinción entre unas empresas y otras, y es así como aparece la marca, postulándose como el principal signo distintivo de los empresarios. Lo que apareció como una obligación de diferenciación a la hora de operar en un mercado repleto de competidores, dio lugar a los empresarios a utilizarlo como estrategia para obtener ventajas competitivas respecto al resto. Por esta situación, fue necesaria la creación de una normativa más completa y detallada que recogiera todos los aspectos que engloban el registro de una marca. Para esto, se tiene en cuenta lo recogido en la actual Ley de Marcas 17/2001, y en base a esta se desarrollará a lo largo del trabajo la jurisprudencia en dicha materia y aspectos relevantes para su correcto entendimiento. ABSTRACT: Nowadays, brands play a fundamental role in the large and globalized market in which we find ourselves, since its main function is to distinguish the different products and services offered in the market. Due to the rapid growth of economic traffic, the evolution in the last decade and the propensity to consume, as a result of this globalization the obligation to create a criterion of distinction between some companies and others appears, and that is how the brand appears, running as The main distinguishing sign of entrepreneurs. What appeared as an obligation of differentiation when operating in a market full of competitors, gave rise to entrepreneurs to use it as a strategy to obtain competitive advantages over the rest. Due to this situation, it was necessary to create a more complete and detailed regulation that included all the aspects that encompass the registration of a trademark. For this, it is taken into account what is included in the current Trademark Law 17/2001, and based on this, jurisprudence will be developed throughout this work and aspects relevant to its correct understanding.Grado en Administración y Dirección de Empresa

Kinematic Analysis of a Tendon-Driven Hybrid Rigid–Flexible Four-Bar; Application to Optimum Dimensional Synthesis

In design matters, mechanisms with deformable elements are a step behind those with rigid bars, particularly if dimensional synthesis is considered a fundamental part of mechanism design. For the purposes of this work, a hybrid rigid–flexible four-bar mechanism has been chosen, the input bar being a continuum tendon of constant curvature. The coupler curves are noticeably more complex but offer more possibilities than the classical rigid four-bar counterpart. One of the objectives of this work is to completely characterize the coupler curves of this hybrid rigid–flexible mechanism, determining the number and type of circuits as well as constituent branches. Another important aim is to apply optimization techniques to the dimensional synthesis of path generation. Considerable progress in finding the best design solutions can be obtained if all the acquired knowledge about the coupler curves of this hybrid mechanism is integrated into the optimization algorithm.This research was funded by the Spanish government through the Ministerio de Ciencia e Innovación (Project PID2020-116176GB-I00), financed by MCIN/AEI/10.13039/501100011033, and funded by the Departamento de Educación from the Regional Basque Government through Project IT1480-22

Aplicación del Cuadro de Mando Integral en Fundación ADECCO

El propósito de este trabajo es analizar una empresa utilizando la herramienta del cuadro de mando integral. Este modelo permite gestionar una empresa uniendo los indicadores financieros que se han utilizado tradicionalmente con los activos intangibles esta dispone. De esta manera, el cuadro de mando nos permitirá seleccionar las estrategias más apropiadas para la fundación Adecco y transformarlas en objetivos a realizar en la empresa para finalmente conseguir el crecimiento de la organización. El objetivo es que la empresa pueda incrementar su crecimiento y rentabilidad siguiendo su estrategia con la mejor coordinación desde sus distintas áreas

Fabrication and characterization of 2D photonic crystals for new optoelectronic devices

Photonic crystals were discovered in the 80s as a possible solution to the control of the spontaneous emission and localization of light. Nevertheless only in recent years, with the spreading of nanotechnologies, the first applications with high technological impact have been achieved, like planar photonic crystal lasers or the nanostructured photonic crystal waveguides. Nowadays new types of optoelectronic devices like single photon emitters based on photonic crystal nanocavities are being pursued. In this talk we will show the fabrication and characterization of new photonic bandgap devices, like Suzuki-phase laser emitters or ring-like emitters, and we will show their emission properties in the far field and their tuning by the fabrication process. These new devices may be used as new optical sensors and as efficient nanosources of laser light.Los cristales fotónicos fueron planteados a finales de los años ochenta como una posible solución al control de la emisión espontánea y a la localización de la luz. Sin embargo, sólo en los últimos años, con el advenimiento de las tecnologías de nanofabricación, se han conseguido las primeras aplicaciones prácticas de elevado impacto tecnológico, como los láseres de cristal fotónico o las guías de onda nanoestructuradas con gap fotónico. En la actualidad se están planteando nuevos dispositivos que permitan la emisión eficiente de un solo fotón o la captura de un átomo en el interior de una nanocavidad de cristal fotónico. En este seminario se mostrará la fabricación y caracterización de nuevos dispositivos con gap fotónico, como emisores láser de fase Suzuki o resonadores láser de anillo, y se mostrarán sus propiedades de emisión en el campo lejano y de sintonización mediante el control preciso del proceso de fabricación. Estos nuevos dispositivos pueden ser usados como nuevos sensores ópticos y como eficientes nanoemisores de luz láser.A. R. Alija agradece una beca predoctoral FPU AP2002-0474 del MEC. L. J. Martínez agradece una beca predoctoral I3P-CSIC. P. A. Postigo agradece un contrato "Ramón y Cajal" y los proyectos CAM GR\MAT\0729\2004 y CICYT TIC2002- 04096-C03-03.Peer reviewe

Hybrid Optimization Based Mathematical Procedure for Dimensional Synthesis of Slider-Crank Linkage

In this paper, an optimization procedure for path generation synthesis of the slider-crank mechanism will be presented. The proposed approach is based on a hybrid strategy, mixing local and global optimization techniques. Regarding the local optimization scheme, based on the null gradient condition, a novel methodology to solve the resulting non-linear equations is developed. The solving procedure consists of decoupling two subsystems of equations which can be solved separately and following an iterative process. In relation to the global technique, a multi-start method based on a genetic algorithm is implemented. The fitness function incorporated in the genetic algorithm will take as arguments the set of dimensional parameters of the slider-crank mechanism. Several illustrative examples will prove the validity of the proposed optimization methodology, in some cases achieving an even better result compared to mechanisms with a higher number of dimensional parameters, such as the four-bar mechanism or the Watt’s mechanism.The authors wish to acknowledge financial support received from the Spanish government through the Ministerio de Economía y Competitividad (Project DPI2015−67626-P (MINECO/FEDER, UE)), the support for the research group through Project Ref. IT949−16, provided by the Departamento de Educación, Política Lingüística y Cultura from the regional Basque Government, and the Program BIKAINTEK 2020 (Ref. 012-B2/2020) provided by the Departamento de Desarrollo Económico, Sostenibilidad y Medio Ambiente from the regional Basque Government

Incidence, Clinical Characteristics, Risk Factors and Outcomes of Acute Coronary Syndrome in Patients With COVID-19: Results of the UMC-19-S10

COVID-19; SARS-Cov-2; Síndrome coronari agutCOVID-19; SARS-Cov-2; Síndrome coronario agudoCOVID-19; SARS-Cov-2; Acute coronary syndromeBackground: There is a lack of knowledge about the real incidence of acute coronary syndrome (ACS) in patients with COVID-19, their clinical characteristics, and their prognoses. Objective: We investigated the incidence, clinical characteristics, risk factors, and outcomes of ACS in patients with COVID-19 in the emergency department. Methods: We retrospectively reviewed all COVID-19 patients diagnosed with ACS in 62 Spanish emergency departments between March and April 2020 (the first wave of COVID-19). We formed 2 control groups: COVID-19 patients without ACS (control A) and non-COVID-19 patients with ACS (control B). Unadjusted comparisons between cases and control subjects were performed regarding 58 characteristics and outcomes. Results: We identified 110 patients with ACS in 74,814 patients with COVID-19 attending the ED (1.48% [95% confidence interval {CI} 1.21-1.78%]). This incidence was lower than that observed in non-COVID-19 patients (3.64% [95% CI 3.54-3.74%]; odds ratio [OR] 0.40 [95% CI 0.33-0.49]). The clinical characteristics of patients with COVID-19 associated with a higher risk of presenting ACS were: previous coronary artery disease, age ≥60 years, hypertension, chest pain, raised troponin, and hypoxemia. The need for hospitalization and admission to intensive care and in-hospital mortality were higher in cases than in control group A (adjusted OR [aOR] 6.36 [95% CI 1.84-22.1], aOR 4.63 [95% CI 1.88-11.4], and aOR 2.46 [95% CI 1.15-5.25]). When comparing cases with control group B, the aOR of admission to intensive care was 0.41 (95% CI 0.21-0.80), while the aOR for in-hospital mortality was 5.94 (95% CI 2.84-12.4). Conclusions: The incidence of ACS in patients with COVID-19 attending the emergency department was low, around 1.48%, but could be increased in some circumstances. Patients with COVID-19 with ACS had a worse prognosis than control subjects with higher in-hospital mortalit

Búsqueda de arquetipos en la relación didáctica del razonamiento proporcional con otros contenidos matemáticos

INNTED Congreso Internacional de Innovación y Tendencias Educativas 202