Reconciling yield stability with international fisheries agencies precautionary preferences: the role of non constant discount factors in age structured models

International fisheries agencies recommend exploitation paths that satisfy two features. First, for precautionary reasons exploitation paths should avoid high fishing mortality in those fisheries where the biomass is depleted to a degree that jeopardise the stock's capacity to produce the Maximum Sustainable Yield (MSY). Second, for economic and social reasons, captures should be as stable (smooth) as possible over time. In this article we show that a conflict between these two interests may occur when seeking for optimal exploitation paths using age structured bioeconomic approach. Our results show that this conflict be overtaken by using non constant discount factors that value future stocks considering their relative intertemporal scarcity.

Valorization of scrap tires pyrolysis oil (STPO) through a 2-stage hydrotreating-hydrocracking strategy. Process variables and kinetic modeling

232 p.

A Real-Time Sliding Mode Control for a Wind Energy System Based on a Doubly Fed Induction Generator

In this paper, a real time sliding mode control scheme for a variable speed wind turbine that incorporates a doubly feed induction generator is described. In this design, the so-called vector control theory is applied, in order to simplify the system electrical equations. The proposed control scheme involves a low computational cost and therefore can be implemented in real-time applications using a low cost Digital Signal Processor (DSP). The stability analysis of the proposed sliding mode controller under disturbances and parameter uncertainties is provided using the Lyapunov stability theory. A new experimental platform has been designed and constructed in order to analyze the real-time performance of the proposed controller in a real system. Finally, the experimental validation carried out in the experimental platform shows; on the one hand that the proposed controller provides high-performance dynamic characteristics, and on the other hand that this scheme is robust with respect to the uncertainties that usually appear in the real systems.

Implementation of the nursing process in a health area: models and assessment structures used

Objective: to analyze what nursing models and nursing assessment structures have been used in the implementation of the nursing process at the public and private centers in the health area Gipuzkoa (Basque Country). Method: a retrospective study was undertaken, based on the analysis of the nursing records used at the 158 centers studied. Results: the Henderson model, Carpenito's bifocal structure, Gordon's assessment structure and the Resident Assessment Instrument Nursing Home 2.0 have been used as nursing models and assessment structures to implement the nursing process. At some centers, the selected model or assessment structure has varied over time. Conclusion: Henderson's model has been the most used to implement the nursing process. Furthermore, the trend is observed to complement or replace Henderson's model by nursing assessment structures.

Novel equation to determine the hepatic triglyceride concentration in humans by MRI: diagnosis and monitoring of NAFLD in obese patients before and after bariatric surgery

Background: Non-alcoholic fatty liver disease (NAFLD) is caused by abnormal accumulation of lipids within liver cells. Its prevalence is increasing in developed countries in association with obesity, and it represents a risk factor for non-alcoholic steatohepatitis (NASH), cirrhosis and hepatocellular carcinoma. Since NAFLD is usually asymptomatic at diagnosis, new non-invasive approaches are needed to determine the hepatic lipid content in terms of diagnosis, treatment and control of disease progression. Here, we investigated the potential of magnetic resonance imaging (MRI) to quantitate and monitor the hepatic triglyceride concentration in humans. Methods: A prospective study of diagnostic accuracy was conducted among 129 consecutive adult patients (97 obesity and 32 non-obese) to compare multi-echo MRI fat fraction, grade of steatosis estimated by histopathology, and biochemical measurement of hepatic triglyceride concentration (that is, Folch value). Results: MRI fat fraction positively correlates with the grade of steatosis estimated on a 0 to 3 scale by histopathology. However, this correlation value was stronger when MRI fat fraction was linked to the Folch value, resulting in a novel equation to predict the hepatic triglyceride concentration (mg of triglycerides/g of liver tissue = 5.082 + (432.104 * multi-echo MRI fat fraction)). Validation of this formula in 31 additional patients (24 obese and 7 controls) resulted in robust correlation between the measured and estimated Folch values. Multivariate analysis showed that none of the variables investigated improves the Folch prediction capacity of the equation. Obese patients show increased steatosis compared to controls using MRI fat fraction and Folch value. Bariatric surgery improved MRI fat fraction values and the Folch value estimated in obese patients one year after surgery. Conclusions: Multi-echo MRI is an accurate approach to determine the hepatic lipid concentration by using our novel equation, representing an economic non-invasive method to diagnose and monitor steatosis in humans.

Acoustic plasmons in extrinsic free-standing graphene

An acoustic plasmon is predicted to occur, in addition to the conventional two-dimensional (2D) plasmon, as the collective motion of a system of two types of electronic carriers coexisting in the same 2D band of extrinsic (doped or gated) graphene. The origin of this novel mode stems from the anisotropy present in the graphene band structure near the Dirac points K and K'. This anisotropy allows for the coexistence of carriers moving with two distinct Fermi velocities along the Gamma K and Gamma K' directions, which leads to two modes of collective oscillation: one mode in which the two types of carriers oscillate in phase with one another (this is the conventional 2D graphene plasmon, which at long wavelengths (q -> 0) has the same dispersion, q(1/2), as the conventional 2D plasmon of a 2D free electron gas), and the other mode found here corresponds to a low-frequency acoustic oscillation (whose energy exhibits at long-wavelengths a linear dependence on the 2D wavenumber q) in which the two types of carriers oscillate out of phase. This prediction represents a realization of acoustic

Elements of Decision under Uncertainty with Applications

This work presents the basic elements for the analysis of decision under uncertainty: Expected Utility Theory and its citicisms and risk aversion and its measurement. The concepts of certainty equivalent, risk premium, absolute risk aversion and relative risk aversion, and the "more risk averse than" relation are discussed. The work is completed with several applications of decision making under uncertainty to different economic problems: investment in risky assets and portfolio selection, risk sharing, investment to reduce risk, insurance, taxes and income underreporting, deposit insurance and the value of information.

Instalaciones energéticas en edificios. viabilidad de las pilas de combustible en edificios de viviendas.

[ES]El siguiente proyecto analiza la viabilidad energética y económica que supone la instalación de una tecnología de pilas de combustible como cogeneración en una vivienda unifamiliar en Madrid. Al mismo tiempo, se compara dicha instalación con otra más desarrollada como es la combinación entre una caldera de condensación y la red eléctrica.

Información y su Valor. Nivel de Información Óptimo. Valor de la Flexibilidad.

En este trabajo se analizan las decisiones de un agente económico, en un contexto incierto, cuando puede obtener o recibir información que resuelve total o parcialmente la incertidumbre a la que se enfrenta. La recepción de información permite al agente adaptar su decisión al mensaje proporcionado por esa información salvo que haya optado por una alternativa irreversible.

Hidrocraqueo de aromáticos ligeros a n-alcanos C2+. Variables de proceso y modelado cinético

323 p.

Plan de Marketing Fisioterapia BE GOOD

El objetivo del presente documento es definir y presentar el Plan de Marketing asociado a una empresa basada en una propuesta empresarial. La empresa a la que se va a hacer referencia en dicho Plan es un centro fisioterapéutico que se denominará “Be Good”. La clínica fisioterapia “Be Good”, se situará en la calle “Villa de Plencia” localizada en el municipio de Getxo y nacerá con el objetivo de ofrecer un servicio de calidad dirigido a la cura y prevención de lesiones músculo-esqueléticas, afecciones respiratorias, patologías neurológicas y, en general, a la satisfacción de cualquier tipo de persona que solicite sus servicios. Aunque existan diferentes metodologías, para llevar a cabo el Plan de Marketing se ha decidido seguir el procedimiento propuesto por José María Sainz de Vicuña (2013). Por medio de la metodología seleccionada, el Plan de Marketing descrito en el presente documento tratará de mejorar la eficacia en la toma de decisiones que influyan en la empresa. Adicionalmente, se actuará de medio para el logro de los objetivos planteados a continuación. Por último, facilitará y optimizará la comunicación interna de la empresa de cara a disponer de procesos de evaluación y control más eficientes responsabilizando al área de marketing de los resultados obtenidos.

La reforma de las pensiones: Análisis económico de la Ley 23/2013

El siguiente Trabajo Fin de Grado analiza las particularidades de la “Ley 23/2013, de 23 de diciembre, reguladora del Factor de Sostenibilidad y del Índice de Revalorización del Sistema de Pensiones de la Seguridad Social”. El trabajo se centra principalmente en los dos componentes que constituyen la ley anteriormente citada, por un lado en el Factor de Sostenibilidad y por otro lado en el Índice de Revalorización de las Pensiones.

MAB. Informe sobre el funcionamiento, organización y actividad del Mercado Alternativo Bursátil

El siguiente trabajo es un estudio sobre el Mercado Alternativo Bursátil para empresas en expansión,un modelo de mercado enfocado a PYMES que buscan expandirse.Supone una nueva fórmula de financiación alternativa para este tipo de empresas, que hasta ahora no podían acceder a los mercados bursátiles. A lo largo de este trabajo analizaremos su funcionamiento, características y evolución de la actividad que ha sufrido desde su creación en el 2009.