Valoración agraria : estudio de caso de una finca cafetera

Este trabajo surge a raíz de un cuestionamiento que se ha planteado acerca de la valoración agraria, y es el hecho de poder diferenciar el valor probable de mercado del valor esperado de venta por parte del propietario a la hora de valorar una empresa del sector agropecuario, que por sus características propias, presenta especificidades diferentes a sectores económicos como el sector real o manufacturero; En este caso concreto, una finca cafetera. A medida que se desarrolle este trabajo se buscará entender y profundizar sobre este tema, que hoy en día, no está tan desarrollado como la valoración de empresas del sector industrial o del sector financiero.53 p.Contenido parcial: Café -- Variedades de café e importancia en el mercado -- La caficultura colombiana en el comercio mundial del café -- Precio internacional del café -- Valoración de empresas -- Teoría del valor -- Enfoque teórico sobre la renta de la tierra

First record of Clay-colored Sparrow (Spizella pallida Swainson, 1832) (Aves: Emberizidae) in Costa Rica

We present the first record of the Clay-colored Sparrow (Spizella pallida) in Costa Rica. An adult bird was recorded ca. 900 Km south of its common wintering range. This represents the first record of the species for the country and for southern Central America

Certifying an irreducible 1024-dimensional photonic state using refined dimension witnesses

We report on a new class of dimension witnesses, based on quantum random access codes, which are a function of the recorded statistics and that have different bounds for all possible decompositions of a high-dimensional physical system. Thus, it certifies the dimension of the system and has the new distinct feature of identifying whether the high-dimensional system is decomposable in terms of lower dimensional subsystems. To demonstrate the practicability of this technique we used it to experimentally certify the generation of an irreducible 1024-dimensional photonic quantum state. Therefore, certifying that the state is not multipartite or encoded using non-coupled different degrees of freedom of a single photon. Our protocol should find applications in a broad class of modern quantum information experiments addressing the generation of high-dimensional quantum systems, where quantum tomography may become intractable.Comment: Journal version (except for small editorial modifications), 4+12 pages, 7 figure

Combining Skeletonization, Setpoint Curves, and Heuristic Algorithms to Define District Metering Areas in the Battle of Water Networks District Metering Areas

[EN] The problem presented in this edition of the Battle of the Water Networks is to define district metering areas (DMAs) in a large network. The problem is addressed in two phases. First, the complexity of the network is simplified by dividing it into three operational areas. Second, an optimization algorithm defines DMAs, looking for the best feasible solution. A preliminary simulation of the network is made. From this, engineering judgment allows for defining an initial set of elements suitable to change. In the second stage, a heuristic algorithm is used to search for the best DMA definition by selecting the locations and settings of the pressure-reducing valves and isolation valves. The network is then divided into two categories: the main pipes and the distribution pipes. Only the distribution pipes can be closed. With these restrictions and those described in the problem, the algorithm looks for the best DMA definition based on both the pressure and demand distribution among all the DMAs.This work was supported by the Program Fondecyt Regular (Project 1180660) of the Comision Nacional de Investigacion Cientifica y Tecnologica (Conicyt), Chile.Martínez-Solano, FJ.; Iglesias Rey, PL.; Mora Melia, D.; Ribelles-Aguilar, J. (2018). Combining Skeletonization, Setpoint Curves, and Heuristic Algorithms to Define District Metering Areas in the Battle of Water Networks District Metering Areas. Journal of Water Resources Planning and Management. 144(6):04018023-1-04018023-7. https://doi.org/10.1061/(ASCE)WR.1943-5452.0000938S04018023-104018023-7144

Periodontitis and alzheimer´s disease

Alzheimer's disease (AD), the main cause of dementia in the adult population, is characterized by a progressive loss of cognitive function. It is considered that neuroinflammation plays a fundamental role in its onset and progression. The bacteria present in the disbiotic microbiome generated during the course of periodontitis (PE) are capable of inducing a systemic inflammatory response, exacerbating the production of proinflammatory mediators that have the potential to spread to the systemic circulation. Several hypotheses point to similar pathophysiological pathways in the establishment of AD and PE, sharing cellular and molecular proinflammatory characteristics. In periodontitis, locally produced cytokines and pro-inflammatory products spread from the ulcerated periodontal pocket into the systemic circulation, or around the trigeminal nerve terminals, which allows the passage of bacteria or their products to the brain. This fact leads to the formation of plaques of amyloid peptide and intraneuronal neurofibrillar tangles (NFTs) that activate the glial cells producing a significant increase in proinflammatory cytokines in the affected regions that lead to a loss of neuronal synapses and neurodegeneration, contributing to the progression of AD. This review of the literature contributes to the understanding of the pathological pathways shared by both diseases such as oxidative damage and inflammation. There is not enough evidence to determine an association between this two pathologies, so it is considered necessary to conduct studies for determine if periodontitis is capable of inducing or exacerbating the neuroinflammation that will trigger AD

Association of retroperitoneal lymphangioleiomyomatosis with endosalpingiosis: a case report

Lymphangioleiomyomatosis is a rare disorder of unknown origin that usually presents pulmonary symptoms. Retroperitoneal lymphangioleiomyomatosis without lung involvement has rarely been reported. We present a 38-year-old woman, the fourth case reported of retroperitoneal lymphangioleiomyomatosis with endosalpingiosis in the literature

La percepción subjetiva del esfuerzo para el control de la carga de entrenamiento en una temporada en un equipo de balonmano

The aim of this research is to study the applicability of the Rate of Perceived Exertion (RPE) from a double perspective. Firstly, RPE helps coaches monitor training load over a season in team sports. Secondly RPE is used as an ad hoc tool for daily monitoring of planned training by the coaching staff. Heart rate reserve (HRR) was used to regulate the internal load of each session. Thirteen players from a Top Division Handball team participated in the research carried out over a complete season. The results showed RPE is a good indicator of training load in team sports and RPE is also a valid procedure to compare load values planned by coaches (RPEp) with actual values (RPEg) (rxy = .792; p < .01). It can be concluded that RPE and HRR (rxy = .839; p < .01) together are reliable, non-invasive measures for monitoring training load and they also help determine the physical fitness of players throughout the season

Effect of power training in throwing velocity in team handball

El propósito de este estudio fue examinar el efecto de diferentes métodos de fuerza unidos al entrenamiento técnico – táctico sobre la potencia muscular y la velocidad de lanzamiento en ambos brazos. Los participantes fueron 11 jugadores senior de balonmano (25±3 años; 188,7±4,7 cm; 90,6 ±10 Kg). Se tomaron 3 periodos de entrenamiento, cada uno de 8 semanas, con diferentes métodos de entrenamiento de la fuerza. Los resultados muestran como el entrenamiento de fuerza basado en el contraste estato – dinámico unido al entrenamiento técnico – táctico durante el periodo competitivo es más eficaz (p=0,033) que sólo la realización de entrenamiento de fuerza máxima combinada con el pico de potencia para la mejora de la velocidad de lanzamiento.The purpose of this study was to examine the effect of different strength methods combined with technical-tactical training on muscle power and throwing velocity in both arms of team handball players. Eleven senior players participated (25±3 years; 188,7±4,7 cm; 90,6 ±10 Kg) in this study. The season was divided into three training periods, each of eight week, to test different methods of strength training. The results show that strength training based on the contrast static - dynamic combined with technical- tactical training during the competitive season is more effective (p=0.033) that only the realization of maximum strength training combined with peak power for improving throwing velocity