Diseño y cálculo de la estructura e instalaciónes generales de las oficinas de una industria petroquímica

Diseño, cálculo, y dimensionado de la estructura e instalaciones del edificio para su posterior ejecución de manera que el mismo obtenga la autorización administrativa para su posterior apertura

Estudio de satisfacción del confort para la toma de decisiones

[ESP] Medir la satisfacción de los usuarios se ha convertido en un medio de valoración de la calidad de los HVAC (Heating, Ventilating and Air Conditioning), permitiendo la verificación y validación de los sistemas de acondicionamiento de aire empleados en los edificios. Sin embargo, estos estudios se realizan a nivel general y sus datos se toman en consideración en su conjunto, pues la mayoría de los estudios tienen como objetivo fundamental la perspectiva ergonómica y psicosocial para optimizar las condiciones de trabajo según la ley de previsión de riesgos laborales (BOE, 1995) o para optimizar el bienestar térmico a través de las instalaciones del edificio según el Reglamento de las Instalaciones Térmicas en los Edificios (RITE) (AENOR, 2007). Frecuentemente, los sistemas de climatización de los edificios tienen un sistema de control, pero la información de la que dispone dicho sistema de control para modificar sus condiciones de operación es muy limitada. Asimismo sucede que el dispositivo de control sigue una ley de modificación que es estándar y que, por tanto, no ha sido comprobada ni verificada en dicho edificio. En consecuencia es frecuente que el grado de satisfacción de los usuarios de un edificio respecto de las condiciones de confort térmico y de calidad de aire interior del mismo sea bajo

Informe sobre el aborto

Informe elaborado por la Comisión de la Vida. Grupo de Profesores católicos de la Universidad de Córdob

Control of HVAC system comfort by sampling

The sampling of the users comfort, allows observing and predicting the level of comfort on the HVAC (heating, ventilation, and air conditioning) systems. The development of online sampling systems assists in the recognition of the behavior patterns that occur in the offices. This paper presents a user-friendly tool designed and developed in order to make easier knowledge extraction and representation to make possible decisions about which demand that must prevail, the user comfort or saving into a central system. This decision may depend on the occupation and feeling of comfort of its occupants. Some studies have put neutral thermal conditions outside the ranges of comfort of the ASHRAE standard. The actual rules of the HVAC systems are based on studies carried out on specific populations in a specific space, which are not valid in certain situations. This is a dynamic idea of the comfort based in real data. The methodology used provides important and useful information to be able to select the comfort set-point of the rooms of a central heating system without the need to use fixed values based on programmed time schedules or any other methodology. The response to comfort in an area of a building throughout the day can be seen in this study. The users were assessed using a standard set of key questions in order to measure the level of satisfaction with environmental factors, thanks to a questionnaire of imprecise answers. We seek an improvement in the building users, regardless of their particularities

Transparent nanocellular PMMA: Characterization and modeling of the optical properties

In this work, the optical properties of transparent nanocellular polymethylmethacrylate (PMMA) have been studied, experimental and theoretically. Transmittance measurements of samples presenting different cell sizes (14, 24, 39 and 225 nm) and a constant relative density of around 0.45 have been carried out obtaining values as high as 0.94 for the sample with the smaller cell size and a thickness of 0.05 mm. In addition, the light absorption coefficient has been measured as a function of cell size and wavelength. It has been found that the transmittance has a strong dependence with the wavelength, presenting these transparent materials Rayleigh scattering. On the other hand, the transmission of visible light through these nanocellular materials has been modelled for the first time. The developed model reproduces with good accuracy the trends observed in the experimental results and provides remarkable insights into the physics mechanisms controlling the optical behavior of these materials

Socio-emotional variables linked to the consumption of drugs amongst university students of Social Sciences: A pilot study

Producción CientíficaThis descriptive and transversal study, carried out on an intentional sample of 211 subjects who were split in terms of their consumption of psychoactive substances over the last month and who were aged between 18 and 28 (M = 21.36, and SD = 1.90), aimed to explore the emotional intelligence, perceived socio-family support and academic performance of university students vis-à-vis their consumption of drugs and to examine the link between them. The goal was to define university student consumer profile through a regression model using the multidimensional Perceived Social Support Scale (EMAS) and the Trait Meta Mood Scale-24 (TMMS-24) as instruments, together with academic performance and gender. The results report alcohol, tobacco, and cannabis consumption rates that are above the levels indicated by the Spanish household survey on alcohol and drugs in Spain (EDADES 2019) for the 15–34-year-old age range in Castilla y León. A certain link was observed between the consumption of substances and academic performance, although no differences were seen in academic performance in terms of consumer type. There was also no clear link observed between emotional intelligence and academic performance or between social support and academic performance. The predictive contribution of the variables included in the regression model was low (9%), which would advocate completing the model with other predictive variables until more appropriate predictability conditions can be found

ACL2 Verification of Simplicial Degeneracy Programs in the Kenzo System

Kenzo is a Computer Algebra system devoted to Algebraic Topology, and written in the Common Lisp programming language. It is a descendant of a previous system called EAT (for Effective Algebraic Topology). Kenzo shows a much better performance than EAT due, among other reasons, to a smart encoding of degeneracy lists as integers. In this paper, we give a complete automated proof of the correctness of this encoding used in Kenzo. The proof is carried out using ACL2, a system for proving properties of programs written in (a subset of) Common Lisp. The most interesting idea, from a methodological point of view, is our use of EAT to build a model on which the verification is carried out. Thus, EAT, which is logically simpler but less efficient than Kenzo, acts as a mathematical model and then Kenzo is formally verified against it.Ministerio de Educación y Ciencia MTM2006-0651

New model for the search for comfort through surveys

This paper presents a methodology used to provide important and useful information to select dynamically the comfort set-point of the rooms for a central heating system without using fixed values based on programmed time schedules or any other methodology. It is possible to observe the users comfort level of a Heating, Ventilation and Air-conditioning (HVAC) system through online surveys. Using fuzzy logic applied to the behaviour patterns that generally occur in an office it is possible to detect situations when it can be decided to maximise comfort and/or maximise savings. This methodology is designed to save energy in these systems depending on the occupation and comfort perception of its occupants

Detecting comfort-based climate settings using surveys

It is possible to observe the users of a heating system’s level of comfort through online surveys. Using fuzzy logic the behaviour patterns that generally occur in an office can be detected. It is also possible to detect situations when it can be decided to maximise comfort and/or maximise savings. This article puts forward a methodology for saving energy in these systems depending on the occupation and feeling of comfort of its occupants. The methodology used provides important and useful information to be able to select the comfort set-point of the rooms of a central heating system without the need to use fixed values based on programmed time schedules or any other methodology