Aplicaciones de la termografia infrarroja y la espectrorradiometría en el estudio del deterioro del patrimonio arquitectónico nacional

It is well known the problems in ancient monumental buildings caused by atmospheric agents. Besides of natural causes, the rise in the atmospheric contamination levels has played an important role in the deterioration of the stones of our national heritage art. Regrettably the partial scientific knowledge of the causes that produced the called "stone disease", has taken to inappropriate restorations that far from solving the problem, they have increased the deterioration process. The need of finding quick and efficient diagnostic methods, specially non-destructive analysis techniques, has originated the use of Infrared Thermography and Spectroradiometry as support tools in the study of the deterioration of monumental stones. The first results are presented in this work.Son conocidos los problemas que la acción de los agentes atmosféricos causa a nuestro patrimonio monumental. Sin duda, el aumento de la contaminación atmosférica contribuye a aumentar las causas naturales del deterioro de las piedras que constituyen nuestro legado histórico. Lamentablemente, el conocimiento científico parcial de las causas que producen el denominado "mal de piedra", ha conllevado a restauraciones inapropiadas que, en no pocas ocasiones, lejos de solucionar el problema, han incrementado el proceso de deterioro o degradación. La necesidad de encontrar métodos de diagnóstico rápidos y eficientes, especialmente los denominados como técnicas de análisis no destructivos, ha dado lugar a la aplicación de la Termografía Infrarroja (TIR) y la Espectrorradiometría (ER) como herramientas de apoyo al estudio del deterioro de las piedras monumentales y cuyos primeros resultados presentamos en este trabajo

Three-level modulation techniques to reduce instantaneous common mode voltage in induction machines

Problems on inverter motor drives such as bearing currents are introduced due to common mode voltages. Different solutions are proposed on literature, for two-level or multilevel inverter. Instantaneous zero common mode voltage by using a three-level inverted could be achieved. This paper proposes a commutation strategy that allows zero common mode voltage by using medium vectors, and also a new representation as a plane on the commutation space is defined which is called zero common mode voltage plane. On this defined plane, every turning vector fulfil this property. Simulations and experimental results clearly show method's efficiency

TEXTURE FUNCTION IN γ-Fe2O3 MAGNETIC TAPES

La fonction de texture des particules de γ-Fe2O3 monodomaines constituant les bandes magnétiques a été déterminée quantitativement par l'exploitation des spectres d'absorption Mössbauer et des cycles d'hystérésis. Il a été vérifié que la contribution des termes d'ordre supérieur à 1 = 4 peut être négligée.The texture function of single domain γ-Fe2O3 particles belonging to magnetic tapes has been quantitatively evaluated by using data of Mössbauer spectroscopy and magnetic hysteresis loop measurements. It has been verified that the contribution of the terms having 1 > 4 can be neglected

Numerical modelling of gas particle fluidised bed dynamics

SIGLEAvailable from British Library Document Supply Centre-DSC:DXN035029 / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Therapy with Ulipristal Acetate in a Hypertensive Patient

Ulipristal acetate (UPA) is a medical therapy for patients with symptomatic uterine fibroids. The drug has shown efficacy in the control of heavy menstrual bleeding and, as a consequence, in anaemia improvement. We report the case of a hypertensive patient treated with two courses of UPA. In addition to its observed benefits on hypermenorrhea caused by uterine fibroids, no exacerbation of the underlying disease was observed. No adverse effects were observed, and blood pressure levels were well controlled throughout

Complex local folding kinematics in western Kopet Dagh derived from vertical-axis rotation

EGU General Assembly in Viena, Austria,7–12 April 2019In northeast Iran, the suture zone of the Paleotethys is situated between the East Alborz Mountains to its south and the Kopet Dagh Mountains to its north. Both mountain belts represent large-scale oroclines, potentially resulting from the indentation of the quasi-rigid South Caspian Basin. The oroclinal shape of the Alborz Mountains has been associated with vertical-axis rotation based on paleomagnetic data. However, no evidence for rotation has been found in the northeastern Kopet Dagh. A plausible scenario is that most of the rotation in the Kopet Dagh has been absorbed along its western part. Here, we present results of vertical-axis rotation and anisotropy of the magnetic susceptibility (AMS) for sites located in the West Kopet Dagh. AMS data range from sedimentary to tectonic fabrics depending on the position with respect to local thrusts. Magnetic vectors do not show significant vertical-axis rotation, implying that no significant rotation took place since Cretaceous times in the western Kopet Dagh. A preliminary comparison of these results with previous data from East Kopet Dagh favours complex local folding kinematics for most of the Kopet Dagh rather than significant vertical-axis rotation