Augmented Manufacturing

The evolution of digital technologies and their rapid adoption by our society is shifting traditional paradigms. The normally conservative industry of architecture is now leading the integration of new techniques in multiple ways. Technologies like 3D printing, robotic automation, platform-based apps and Mixed Realities are changing architecture workflows. Using these interfaces, designers and builders are leaving the Post-Industrial Age to enter the Augmented Age. Looking towards the near future, the use of Mixed Reality technology will change the traditional role of the workforce, enhancing and extending their skills. Future workers will have access to real-time skills and guidance through augmentation, facilitating and preserving traditional craftsmanship and integrating them simultaneously with computational architecture. This research explores how the application of augmented reality can challenge the concept of the traditional artisan and propose a new approach to the access of skills and labour in manufacturing methodologies for the architectural environment. The analysis will review the impact of mixed realities by studying three study cases themed into two different topics, craftsmanship and digital platforms

El tangram y el plegado: dos recursos pedagógicos para aproximarse a la enseñanza de las fracciones propias

En este artículo se presentan algunas reflexiones en torno al diseño e implementación de una propuesta en la que se utilizó el tangram y el plegado como recursos pedagógicos, para la enseñanza en grado sexto de las fracciones propias bajo la interpretación de la fracción como relación parte-todo

Can accelerated aging procedures predict the long term behavior of polymers exposed to different environments?

none2siDuring their useful life, polymers are subject to degradation processes due to exposure to specific environmental conditions over long times. These processes generally lead to changes, almost always irreversible, of properties and performances of polymers, changes which would be useful to be able to predict in advance. To meet this need, numerous investigations have been focused on the possibility to predict the long-term performance of polymers, if exposed to specific environments, by the so called “accelerated aging” tests. In such procedures, the long-term behavior of polymeric materials is typically predicted by subjecting them to cycles of radiations, temperatures, vapor condensation, and other external agents, at levels well above those found in true conditions in order to accelerate the degradation of polymers: this can produce effects that substantially deviate from those observable under natural exposure. Even following the standard codes, different environmental parameters are often used in the diverse studies, making it difficult to compare different investigations. The correlation of results from accelerated procedures with data collected after natural exposure is still a debated matter. Furthermore, since the environmental conditions are a function of the season and the geographical position, and are also characteristic of the type of exposure area, the environmental parameters to be used in accelerated aging tests should also consider these variables. These and other issues concerning accelerated aging tests applied to polymers are analyzed in the present work. However, bearing in mind the limitations of these practices, they can find useful applications for rating the durability of polymeric materials.openM. Frigione, A. Rodríguez-PrietoFrigione, M.; Rodríguez-Prieto, A

Empirical evaluation of the efficiency of the Iberian power futures market

Market efficiency is analysed for the Iberian Power Futures Market and other European Power Markets, as well as other fuel markets through evaluation of ex-post Forward Risk Premium. The equilibrium price from compulsory call auctions for distribution companies within the framework of the Iberian Power Futures Market is not optimal for remuneration purposes as it seems to be slightly upward biased, though such a premium is not significant (only around 2% above the average of Settlement Prices). In the period considered (August 2006 to September 2008), monthly futures contracts behave similarly to quarterly contracts. Average risk premia have been positive in power and natural gas markets but negative in oil and coal markets. Different hypotheses are tested regarding increasing volatility with maturity and regarding Forward Risk Premium correlations (negative with variance of spot prices during delivery period and positive with skewness of spot prices during delivery period). Enlarged data sets are recommended for stronger test results. Energy markets tend to show limited levels of market efficiency. Regarding the emerging Iberian Power Futures Market, price efficiency is improved with market development and with further integration of European Regional Power MarketsPeer Reviewe

Evaluación de resultados en siete casos de cirugía para epilepsia médicamente intratable en pacientes de edad pediátrica en El Salvador

La epilepsia es un problema global que afecta a pacientes de toda edad y de ambos sexos. Entre los pacientes más afectados se encuentran aquellos menores de edad, particularmente aquellos en edad pediátrica. Según un estudio realizado en el Hospital Nacional de Niños Benjamín Bloom (HNNBB), en El Salvador existen datos que revelan que la epilepsia corresponde a un 55% del total de la consulta neurológica (Valencia C., 1995). Durante el año 2008, según las estadísticas del hospital, se contabilizó un aproximado de 2,065 pacientes con diagnóstico de epilepsias parciales

Risk-Based Framework for the Integration of RPAS in Non-Segregated Airspace

Remotely Piloted Aircraft Systems (RPAS) are new airspace users that require to be safely integrated into the non-segregated airspace. Currently, their integration is planned for the horizon 2025, but there is a lot of pressure by RPAS operators to fly as soon as possible. This research focuses on the development of a risk-based framework for the integration of RPAS in non-segregated airspace. The risk-based framework relies on a hierarchical methodology that is split into two time horizons: design and operation. Different operational and geometrical factors characterise each stage. Then, a set of risk and operational indicators are defined for each stage. These indicators evaluate the operational airspace state and provide information about how the integration of RPAS should be. Primary results provide information about geographical and temporary restrictions. Geographical restrictions refer to the airways that favour or inhibit the integration of RPAS, and temporary restrictions denote the time span when the RPAS can pierce into the airspace

New Bounds for Topological Indices on Trees through Generalized Methods

This article belongs to the Special Issue Analytical and Computational Properties of Topological Indices.Topological indices are useful for predicting the physicochemical behavior of chemical compounds. A main problem in this topic is finding good bounds for the indices, usually when some parameters of the graph are known. The aim of this paper is to use a unified approach in order to obtain several new inequalities for a wide family of topological indices restricted to trees and to characterize the corresponding extremal trees. The main results give upper and lower bounds for a large class of topological indices on trees, fixing or not the maximum degree. This class includes the first variable Zagreb, the Narumi–Katayama, the modified Narumi–Katayama and the Wiener index.The first author was partially supported by a grant from Ministerio de Ciencia, Innovación y Universidades (PGC2018-098321-B-I00), Spain; the second author was partially supported by two grants from Ministerio de Economía y Competitividad, Agencia Estatal de Investigación (AEI) and Fondo Europeo de Desarrollo Regional (FEDER) (MTM2016-78227-C2-1-P and MTM2017-90584-REDT), Spain

Caries corono-radicular relacionado con saliva en adultos mayores que acuden al centro integral del adulto mayor de la Esperanza, 2018

El objetivo de este estudio fue determinar la relación entra la caries corono- radicular y el pH salival de los adultos mayores que acuden al Centro Integral del Adulto Mayor de la Esperanza. Materiales y método: Se realizó un estudio prospectivo, transversal, descriptivo y observacional. Se evaluaron a 121 adultos mayores de más de 60 años de edad, de los cuales 72 presentaron caries radicular; con 10 piezas dentales como mínimo. Se empleó el Índice de Caries Radicular (ICR) de Katz para evaluar la presencia de caries en el cuello dental y cinta medidora de pH MColorpHastTM para determinar el pH salival. Resultados: Se encontró que los adultos mayores tuvieron un ICR de 21.4%, en los grupos de edades, de 60 a 65 años 21.6%, de 66 a 75 años 19.4% y más de 75 años 23.4%; el pH salival encontrado fue 6.5, según los grupos de edades 6.2, 6.7 y 6.5 respectivamente. Conclusiones: Se encontró que si existe relación estadísticamente significativa entre la Caries Radicular y el pH salival en los Adultos Mayores.The objective of this study was to determine the relationship between crown- radicular caries and salivary pH of older adults who attend the Integral Center for the Elderly Adult of Hope. Materials and methods: A prospective, cross-sectional, descriptive and observational study was conducted. A total of 121 adults over 60 years of age were evaluated, of which 72 had root caries; with at least 10 teeth The Katz Radicular Caries Index (ICR) was used to evaluate the presence of dental neck caries and MColorpHastTM pH measuring tape to determine salivary pH. Results: It was found that older adults had an ICR of 21.4%, in the age groups, from 60 to 65 years old 21.6%, from 66 to 75 years old 19.4% and more than 75 years old 23.4%; the salivary pH found was 6.5, according to age groups 6.2, 6.7 and 6.5 respectively. Conclusions: It was found that there is a statistically significant relationship between Radicular Caries and salivary pH in the Elderly.Tesi