Real-Time Fault Detection and Diagnosis Using Intelligent Monitoring and Supervision Systems

In monitoring and supervision schemes, fault detection and diagnosis characterize high efficiency and quality production systems. To achieve such properties, these structures are based on techniques that allow detection and diagnosis of failures in real time. Detection signals faults and diagnostics provide the root cause and location. Fault detection is based on signal and process mathematical models, while fault diagnosis is focused on systems theory and process modeling. Monitoring and supervision complement each other in fault management, thus enabling normal and continuous operation. Its application avoids stopping productive processes by early detection of failures and by applying real-time actions to eliminate them, such as predictive and proactive maintenance based on process conditions. The integration of all these methodologies enables intelligent monitoring and supervision systems, enabling real-time fault detection and diagnosis. Their high performance is associated with statistical decision-making techniques, expert systems, artificial neural networks, fuzzy logic and computational procedures, making them efficient and fully autonomous in making decisions in the real-time operation of a production system

Respectable and Disreputable Women Mechanisms of Relief for and Oppression of Women in Spain in the Early Modern Period

AbstractOne of the defining characteristics of the working classes during the Old Regime was poverty, and the main victims were women, especially those who “vivían sobre sí” [eighteenth century Spanish expression meaning to fend for or support oneself]. Indeed, the percentage of female-headed households in cities which were considered “impoverished” was higher than that of male-headed households. Furthermore, women not only had to cope with hardship and destitution but they also expected to scrupulously observe the prevailing moral doctrine. If they were considered respectable, they were eligible to receive relief from public and private charitable institutions, but should they transgress the moral standards of the day, they would find that there was no room for toleranc

A source for the study of prisons in the Kingdom of León: the record of 1817

The paper consist of an analysis of prisoner’s living conditions in the various types of prison which existed in the region during the Ancient Regime. The diversity of judicial systems in the region created the need for widely differing institutions, from small rural prisons to large-scale establishments created by the crown to transform vagabonds into productive individuals.En el trabajo se analizan las condiciones de vida de vida de los encarcelados en los diferentes tipos de cárceles que operaban en las provincias de León y Zamora durante el Antiguo Régimen. La diversidad de los sistemas judiciales en la región introdujo la necesidad de instituciones muy diferentes, desde las pequeñas cárceles rurales a los grandes establecimientos creados por la corona para transformar vagabundos en individuos productivos

Experimental measurement of endocytosis in fungal hyphae.

The present study examines the notion that polarized exocytosis in the tips of growing hyphae creates an excess of plasma membrane and thus the need for its removal by endocytosis. To measure endocytosis experimentally, we developed a photobleaching (FRAP) procedure to count endocytic events in hyphae of Neurospora crassa carrying a fluorescent tag on the actin-binding protein fimbrin (FIM-1-GFP). Given 40 nm as the average diameter of endocytic vesicles, we calculated that about 12.5% of the plasma membrane discharged in the apex becomes endocytosed in the subapex. According to our calculations, the GFP-tagged hyphae of N. crassa, measured under the constrained conditions of confocal microscopic examination, needed about 8800 vesicles/min to extend their plasma membrane or about 9800/min, if we include predicted demands for cell wall growth and extracellular secretion. Our findings support the notion that exocytosis and endocytosis operate in tandem with the latter serving as a compensatory process to remove any excess of plasma membrane generated by the intense exocytosis in the hyphal tips. Presumably, this tandem arrangement evolved to support the hallmark features of fungi namely rapid cell extension and abundant secretion of hydrolytic enzymes

El proceso de descubrimiento en la clase de matemáticas: los razonamientos abductivo, inductivo y deductivo

En el present article s'exposen i analitzen alguns resultats d'una investigació desenvolupada a la Universitat Pedagògica Nacional durant els anys  2010  i  2011 (DMA-204-10). En aquesta investigació es caracteritzen les diferents formes de raonar usades per un grup de professors de matemàtiques en formació en resoldre algunes activitats relacionades amb els nombres racionals i irracionals. L'enfocament teòric usat per al desenvolupament de la investigació reprèn alguns aspectes de la teoria de Peirce sobre el mètode científic i sobre el raonament matemàtic, els quals permeten interpretar les argumentacions desenvolupades pels alumnes en la resolució de les diferents activitats i discutir els resultats de altres estudis que s'adscriuen a la mateixa línia d'investigació, com ara la proposta de Cañadas i Castro (2007) sobre el procés de conjeturació. Com a resultat d'aquest treball s'obté la caracterització i classificació de les diferents formes de raonar emprades en el procés de descobriment matemàtic, així com alguns exemples de cadascuna d'aquestes.In this paper, we present and analyze some results of a research carried out at the Universidad Pedagógica Nacional during the years 2010 and 2011. In this study we characterize the different forms of reasoning used by a group of prospective mathematics teachers to address some activities related to rational and irrational numbers. The theoretical approach used for the development of research incorporates some aspects of Peirce’s theory of scientific method and mathematical reasoning, which can interpret the arguments developed by students in the resolution of the different task and discuss the results of other studies that are assigned to the same line of research, such as the proposed Cañadas and Castro (2007) about conjecture process. As a result of this work we obtain the characterization and classification of different forms of reasoning employed in the process of mathematical discovery and examples of each of these.En el presente artículo se exponen y analizan algunos resultados de una investigación desarrollada en la Universidad Pedagógica Nacional durante los años 2010 y 2011 (DMA-204-10). En esta investigación se caracterizan las diferentes formas de razonar usadas por un grupo de profesores de matemáticas en formación al resolver algunas actividades relacionadas con los números racionales e irracionales. El enfoque teórico usado para el desarrollo de la investigación retoma algunos aspectos de la teoría de Peirce sobre el método científico y sobre el razonamiento matemático, los cuales permiten interpretar las argumentaciones desarrolladas por los alumnos en la resolución de las diferentes actividades y discutir los resultados de otros estudios que se adscriben a la misma línea de investigación, como por ejemplo la propuesta de Cañadas y Castro (2007) sobre el proceso de conjeturación. Como resultado de este trabajo se obtiene la caracterización y clasificación de las diferentes formas de razonar empleadas en el proceso de descubrimiento matemático, así como algunos ejemplos de cada una de estas

Vassiliev Invariants for Links from Chern-Simons Perturbation Theory

The general structure of the perturbative expansion of the vacuum expectation value of a product of Wilson-loop operators is analyzed in the context of Chern-Simons gauge theory. Wilson loops are opened into Wilson lines in order to unravel the algebraic structure encoded in the group factors of the perturbative series expansion. In the process a factorization theorem is proved for Wilson lines. Wilson lines are then closed back into Wilson loops and new link invariants of finite type are defined. Integral expressions for these invariants are presented for the first three primitive ones of lower degree in the case of two-component links. In addition, explicit numerical results are obtained for all two-component links of no more than six crossings up to degree four.Comment: 44 pages, LaTex, epsf.sty, 15 figure

Machine learning identification of piezoelectric properties.

The behavior of a piezoelectric element can be reproduced with high accuracy using numerical simulations. However, simulations are limited by knowledge of the parameters in the piezoelectric model. The identification of the piezoelectric model can be addressed using different techniques but is still a problem for manufacturers and end users. In this paper, we present the use of a machine learning approach to determine the parameters in the model. In this first work, the main sensitive parameters, c11, c13, c33, c44 and e33 were predicted using a neural network numerically trained by using finite element simulations. Close to one million simulations were performed by changing the value of the selected parameters by ±10% around the starting point. To train the network, the values of a PZT 27 piezoelectric ceramic with a diameter of 20 mm and thickness of 2 mm were used as the initial seed. The first results were very encouraging, and provided the original parameters with a difference of less than 0.6% in the worst case. The proposed approach is extremely fast after the training of the neural network. It is suitable for manufacturers or end users that work with the same material and a fixed number of geometries