Harmonic Order Tracking Analysis: A Speed-Sensorless Method for Condition Monitoring of Wound Rotor Induction Generators

"(c) 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works."[EN] This paper introduces a speed-sensorless method for detecting rotor asymmetries in wound rotor induction machines working under nonstationary conditions. The method is based on the time-frequency analysis of rotor currents and on a subsequent transformation, which leads to the following goals: unlike conventional spectrograms, it enables to show the diagnostic results as a simple graph, similar to a Fourier spectrum, but where the fault components are placed always at the same positions, regardless the working conditions of the machine; moreover, it enables to assess the machine condition through a very small set of parameters. These characteristics facilitate the understanding and processing of the diagnostic results, and thus, help to design improved monitoring and predictive maintenance systems. Also these features make the proposed method very suitable for condition monitoring of wind power generators, because it fits well with the usual non stationaryworking conditions ofwind turbines, and makes feasible the transmission of significant diagnostic information to the remote monitoring center using standard data transmission systems. Simulation results and experimental tests, carried out on a 5-kW laboratory rig, show the validity of the proposed method and illustrate its advantages regarding previously developed diagnostic methods under nonstationary conditions.This work was supported by the Spanish Ministerio de Economia y Competitividad in the framework of the Programa Estatal de Investigacion, Desarrollo e Innovacion Orientada a los Retos de la Sociedad under Project (DPI2014-60881-R).Sapena Bañó, Á.; Riera Guasp, M.; Puche Panadero, R.; Martínez Román, JA.; Pérez Cruz, J.; Pineda Sánchez, M. (2016). Harmonic Order Tracking Analysis: A Speed-Sensorless Method for Condition Monitoring of Wound Rotor Induction Generators. IEEE Transactions on Industry Applications. 52(6):4719-4729. https://doi.org/10.1109/TIA.2016.2597134S4719472952

Electrical Machines Laminations Magnetic Properties: A Virtual Instrument Laboratory

"© 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.” Upon publication, authors are asked to include either a link to the abstract of the published article in IEEE Xplore®, or the article’s Digital Object Identifier (DOI).Undergraduate courses in electrical machines often include an introduction to their magnetic circuits and to the various magnetic materials used in their construction and their properties. The students must learn to be able to recognize and compare the permeability, saturation, and losses of these magnetic materials, relate each material to its specific properties, and understand the impact of these properties on the major performance metrics of electrical machines. This paper describes a new test equipment setup and lab guide that helps students achieve these learning goals. The test equipment consists of two transformers of grain-oriented and non-grain-oriented electrical steel, transducers, a data acquisition (DAQ) board and a PC-based virtual instrument. The virtual instrument shows voltage, current, and core flux time waveforms, the rms voltage versus current curves and, most importantly, the lamination material magnetic cycle. Students' laboratory work was organized into a series of experiments that guide their achievement of these magnetic materials-related abilities. Pre- and post-lab exams assessed student learning, which was shown to have increased significantly. Students' opinions of the relevance, usefulness, and motivational effect of the laboratory were also positiveMartínez-Román, J.; Pérez Cruz, J.; Pineda Sánchez, M.; Puche Panadero, R.; Roger Folch, J.; Riera Guasp, MV.; Sapena Bañó, Á. (2015). Electrical Machines Laminations Magnetic Properties: A Virtual Instrument Laboratory. IEEE Transactions on Education. 58(1):159-166. doi:10.1109/TE.2014.2348536S15916658

Neurotology findings in the internuclear ophthalmoplegia. Case report

[ES] En la oftalmoplejía internuclear se produce una paresia de la aducción del ojo ipsilateral a la lesión y un nistagmo de abducción en el ojo contraleteral. Esta patología implica una lesión del fascículo longitudinal medial, pudiendo aparecer aislada ó asociada a otras patologías. Debido a que en ocasiones esta enfermedad debuta como mareo ó inestabilidad, los pacientes que la presentan son frecuentemente derivados a la consulta de otoneurología, donde se ha de realizar un estudio exhaustivo que puede revelar la presencia del nistagmo característico de esta patología y una normofunción vestibular. Presentamos el caso de una paciente que acudió a consulta de otoneurología con clínica de mareo de meses de evolución no acompañado de otra sintomatología. [EN] Internuclear ophthalmoplegia is characterized by a paresis of the adduction of the affected eye and abduction nystagmus of the contralateral eye. This pathology implies an injury of the longitudinal medial fascicle. It can appears isolated or associated with other pathologies. Sometimes this disease begins with a disequilibrium. That is why patients are usually referred to an otoneurology specialist, where they are thoroughly examined to show the typical nystagmus without vestibular failure. In this paper we present a patient who came to the otoneurology specialist. She sufered from desiquilibrium without other symptoms for several months

Peripheral facial paralysis as a complication of a secretory otitis in children, a case report

[ES] Existen en la literatura diferentes reportes acerca de las complicaciones de la Otitis Secretora (OS) de la infancia pero muy pocos referentes a Parálisis Facial Periférica. Describimos un caso de PFP derecha secundaria a OS ipsilateral en un niño de 2 años admitido en nuestro servicio, que recibió tratamiento médico y quirúrgico con colocación de drenaje transtimpánico y posterior resolución del proceso. Presentamos su sintomatología, hallazgos en el examen físico, pruebas complementarias, manejo, evolución y se realiza una revisión del tema. [EN] There are different reports in the literature about the complications of Secretory Otitis (SO) in childhood but few of them relating to peripheral facial paralysis (PFP). We describe a case of PFP secondary to an ipsilateral SO in a child under 2 years old admitted to our service. The patient was treated with medical treatment and surgical transtympanic tube placement with subsequent resolution of the process and favorable outcome. We report the symptoms, physical examination findings, laboratory tests, management and evolution, performing a literature review

Clinical findings in the Superior Canal Dehiscence: two cases report.

[ES] La dehiscencia del canal semicircular superior es una alteración anatómica poco frecuente que consiste en una pérdida de hueso en la cubierta del canal semicircular superior que se convierte en una comunicación entre el canal y la cavidad craneal. Este defecto se diagnostica mediante una prueba de imagen, normalmente la Tomografía Computerizada. Debido a esta anomalía los pacientes acuden a consulta de otoneurología refiriendo hipoacusia que tras ser estudiada se define como hipoacusia de transmisión con reflejos estapediales presentes sin hallazgos patológicos en oído medio o como un síndrome vertiginoso que aparece en relación con sonidos de alta intensidad o cambios de presión como las maniobras de Valsalva. En este artículo presentamos dos casos vistos en consulta representativos de cada una de estas formas clínicas. [EN] The superior canal dehiscence syndrome is an uncommon anatomical lesion characterized by loss of the bone covering the superior canal, so that there is a potential communication between the canal and the craneal cavity. This defect can be diagnosed by an image test, usually the Computed Tomography. Due to this pathology patients go to the otoneurologist referring a conductive hearing loss with normal middle ear function and normal stapedius reflex threshold or vertigo induced either by loud noises or middle ear pressure changes such as Valsalva manoeuvres.In this paper we present two cases which explain each clinical form

Vapor pressure deficit constrains transpiration and photosynthesis in holm oak: A comparison of three methods during summer drought.

High rates of vapor pressure deficit (VPD) can severely decrease plant productivity by reducing stomatal conductance, which might be exacerbated during Mediterranean summers due to soil water deficit. In this study, we monitored the response of holm oak, the archetype of Mediterranean trees, to changes in VPD during a summer drought period to evaluate the effects and consequences on gas exchange of the two water stresses (atmospheric and soil). Measurements were performed on trees growing in an experimental plantation over two summers with moderate drought stress by using three different methods: at the leaf level with an infrared gas analyzer, using a whole-plant chamber for short-term monitoring at the tree level, and measuring the canopy temperature for long-term monitoring. The three methods provided negative relationships between leaf conductance and VPD but with discrepancies probably associated with the measurement scale. Overall, the results showed that atmospheric and soil water stress had an additive effect. Under well-watered conditions, an increase in VPD was partially compensated by a reduction in stomatal conductance, resulting in a slight increase in the transpiration rates. With soil water deficit, the response to VPD resulted in a further decrease in stomatal conductance, reducing transpiration as a water saving strategy. The decrease in conductance in response to VPD was transitory, recovering to initial values as soon as the VPD decreased, both under well-watered and drought conditions. Due to this high sensitivity to atmospheric drought, the maximum carbon gain rates of holm oak were restricted to a short environmental window, which might modulate its physiological performance and natural distribution.Publishe

Aberrant epigenome in iPSC-derived dopaminergic neurons from Parkinson's disease patients

The epigenomic landscape of Parkinson's disease (PD) remains unknown. We performed a genomewide DNA methylation and a transcriptome studies in induced pluripotent stem cell (iPSC)-derived dopaminergic neurons (DAn) generated by cell reprogramming of somatic skin cells from patients with monogenic LRRK2-associated PD (L2PD) or sporadic PD (sPD), and healthy subjects. We observed extensive DNA methylation changes in PD DAn, and of RNA expression, which were common in L2PD and sPD. No significant methylation differences were present in parental skin cells, undifferentiated iPSCs nor iPSC-derived neural cultures not-enriched-in-DAn. These findings suggest the presence of molecular defects in PD somatic cells which manifest only upon differentiation into the DAn cells targeted in PD. The methylation profile from PD DAn, but not from controls, resembled that of neural cultures not-enriched-in-DAn indicating a failure to fully acquire the epigenetic identity own to healthy DAn in PD. The PD-associated hypermethylation was prominent in gene regulatory regions such as enhancers and was related to the RNA and/or protein downregulation of a network of transcription factors relevant to PD (FOXA1, NR3C1, HNF4A, and FOSL2). Using a patient-specific iPSC-based DAn model, our study provides the first evidence that epigenetic deregulation is associated with monogenic and sporadic PD

Point-of-care manufacturing: a single university hospital's initial experience

The integration of 3D printing technology in hospitals is evolving toward production models such as point-of-care manufacturing. This study aims to present the results of the integration of 3D printing technology in a manufacturing university hospital.Analysis and interpretation of the data supported by Project PI18/01625 (Ministerio de Ciencia, Innovación y Universidades, Instituto de Salud Carlos III) and European Regional Development Fund (“Una manera de hacer Europa”)

Clinical Impact of the Time in Therapeutic Range on Early Hospital Readmission in Patients with Acute Heart Failure Treated with Oral Anticoagulation in Internal Medicine

Background and objectives: Patients with heart failure (HF) often present with non-valvular atrial fibrillation and require oral anticoagulation with coumarin anticoagulants such as acenocoumarol. The objective of this study was to evaluate the relationship between time in therapeutic range (TTR) and the risk of early readmission. Materials and Methods: A retrospective descriptive study was carried out on hospitalized patients with a diagnosis of HF between 2014 and 2018 who had adverse effects due to oral anticoagulation with acenocoumarol (underdosing, overdosing, or hemorrhage). Clinical, analytical, therapeutic, and prognostic variables were collected. TTR is defined as the duration of time in which the patient’s International Normalized Ratio (INR) values were within a desired range. Early readmission was defined as readmission within 30 days after hospital discharge. Patients were divided into two groups depending on whether or not they had a TTR less than 60% (TTR < 60%) over the 6 months prior to the adverse event. Results: In the cohort of 304 patients, the mean age was 82 years, 59.9% of the patients were female, and 54.6% had a TTR < 60%. Patients with TTR < 60% had a higher HAS-BLED score (4.04 vs. 2.59; p < 0.001) and INR (6 vs. 5.31; p < 0.05) but lower hemoglobin (11.67 vs. 12.22 g/dL; p < 0.05). TTR < 60% was associated with early readmission after multivariate analysis (OR: 2.05 (CI 95%: 1.16–3.61)). They also had a higher percentage of hemorrhagic events and in-hospital mortality but without reaching statistical significance. Conclusions: Patients with HF and adverse events due to acenocoumarol often have poor INR control, which is independently associated with a higher risk of early readmission

Effect of viral storm in patients admitted to intensive care units with severe COVID-19 in Spain: a multicentre, prospective, cohort study

Background: The contribution of the virus to the pathogenesis of severe COVID-19 is still unclear. We aimed to evaluate associations between viral RNA load in plasma and host response, complications, and deaths in critically ill patients with COVID-19. Methods: We did a prospective cohort study across 23 hospitals in Spain. We included patients aged 18 years or older with laboratory-confirmed SARS-CoV-2 infection who were admitted to an intensive care unit between March 16, 2020, and Feb 27, 2021. RNA of the SARS-CoV-2 nucleocapsid region 1 (N1) was quantified in plasma samples collected from patients in the first 48 h following admission, using digital PCR. Patients were grouped on the basis of N1 quantity: VIR-N1-Zero ([removed]2747 N1 copies per mL). The primary outcome was all-cause death within 90 days after admission. We evaluated odds ratios (ORs) for the primary outcome between groups using a logistic regression analysis. Findings: 1068 patients met the inclusion criteria, of whom 117 had insufficient plasma samples and 115 had key information missing. 836 patients were included in the analysis, of whom 403 (48%) were in the VIR-N1-Low group, 283 (34%) were in the VIR-N1-Storm group, and 150 (18%) were in the VIR-N1-Zero group. Overall, patients in the VIR-N1-Storm group had the most severe disease: 266 (94%) of 283 patients received invasive mechanical ventilation (IMV), 116 (41%) developed acute kidney injury, 180 (65%) had secondary infections, and 148 (52%) died within 90 days. Patients in the VIR-N1-Zero group had the least severe disease: 81 (54%) of 150 received IMV, 34 (23%) developed acute kidney injury, 47 (32%) had secondary infections, and 26 (17%) died within 90 days (OR for death 0·30, 95% CI 0·16–0·55; p<0·0001, compared with the VIR-N1-Storm group). 106 (26%) of 403 patients in the VIR-N1-Low group died within 90 days (OR for death 0·39, 95% CI 0·26–0·57; p[removed]11 página