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

Detection of Wind Turbine Failures through Cross-Information between Neighbouring Turbines

In this paper, the time variation of signals from several SCADA systems of geographically closed turbines are analysed and compared. When operating correctly, they show a clear pattern of joint variation. However, the presence of a failure in one of the turbines causes the signals from the faulty turbine to decouple from the pattern. From this information, SCADA data is used to determine, firstly, how to derive reference signals describing this pattern and, secondly, to compare the evolution of different turbines with respect to this joint variation. This makes it possible to determine whether the behaviour of the assembly is correct, because they maintain the well-functioning patterns, or whether they are decoupled. The presented strategy is very effective and can provide important support for decision making in turbine maintenance and, in the near future, to improve the classification of signals for training supervised normality models. In addition to being a very effective system, it is a low computational cost strategy, which can add great value to the SCADA data systems present in wind farms.Peer ReviewedObjectius de Desenvolupament Sostenible::7 - Energia Assequible i No Contaminant::7.a - Per a 2030, augmentar la cooperació internacional per tal de facilitar l’accés a la investigació i a les tecnolo­gies energètiques no contaminants, incloses les fonts d’energia renovables, l’eficiència energètica i les tecnologies de combustibles fòssils avançades i menys contaminants, i promoure la inversió en infraestructures energètiques i tecnologies d’energia no contaminantObjectius de Desenvolupament Sostenible::7 - Energia Assequible i No Contaminant::7.b - Per a 2030, ampliar la infraestructura i millorar la tecnologia per tal d’oferir serveis d’energia moderns i sos­tenibles per a tots els països en desenvolupament, en particular els països menys avançats, els petits estats insulars en desenvolupament i els països en desenvolupament sense litoral, d’acord amb els programes de suport respectiusObjectius de Desenvolupament Sostenible::7 - Energia Assequible i No ContaminantPostprint (published version

Paclitaxel and baccatin III production induced by methyl jasmonate in free and immobilized cells of Taxus baccata

Erworben im Rahmen der Schweizer Nationallizenzen (http://www.nationallizenzen.ch)The effects of 100 and 200 µM methyl jasmonate (MJA) on cell proliferation and paclitaxel and baccatin III production were investigated in free and alginate immobilized cells of Taxus baccata growing in a selected product formation culture medium. The greatest accumulation of paclitaxel (13.20 mg dm−3) and baccatin III (4.62 mg dm−3) occurred when 100 µM MJA was added to the culture medium of cells entrapped using a 1.5 and 2.5 % alginate solution. The effects of different treatments on the viability of cultured cells and their capacity to excrete both taxanes into the surrounding medium were considered.

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