Analysis of bilinear oscillators under harmonic loading using nonlinear output frequency response functions

In this paper, the new concept of Nonlinear Output Frequency Response Functions (NOFRFs) is extended to the harmonic input case, an input-independent relationship is found between the NOFRFs and the Generalized Frequency Response Functions (GFRFs). This relationship can greatly simplify the application of the NOFRFs. Then, beginning with the demonstration that a bilinear oscillator can be approximated using a polynomial type nonlinear oscillator, the NOFRFs are used to analyze the energy transfer phenomenon of bilinear oscillators in the frequency domain. The analysis provides insight into how new frequency generation can occur using bilinear oscillators and how the sub-resonances occur for the bilinear oscillators, and reveals that it is the resonant frequencies of the NOFRFs that dominate the occurrence of this well-known nonlinear behaviour. The results are of significance for the design and fault diagnosis of mechanical systems and structures which can be described by a bilinear oscillator model

La inclusión de publicidad en informativos: el caso de <i>Deportes Cuatro</i>

El nacimiento de nuevos canales y el desarrollo y la expansión de medios de comunicación como Internet han llevado a la televisión a repensar la forma de hacer publicidad. A los ya tradicionales spots, patrocinios o publirreportajes entre otros, se han ido sumando, de forma paulatina, formatos publicitarios alternativos que tratan de evitar la fuga de espectadores. La necesidad de financiamiento ha hecho que espacios antes exentos de publicidad estén ahora colmados de anuncios que, como en el caso de los informativos deportivos españoles, sacan provecho de unos elevados índices de audiencia, una franja horaria atractiva, un público concreto y unos valores de credibilidad, seriedad y fiabilidad asociados al informativo como estrategia para atraer al anunciante. Por esta razón, en el presente artículo estableceremos qué tipo de publicidad emiten, a qué formatos se corresponde, de qué forma se hace y cómo se muestra esta a una audiencia cada vez más segmentada y exigente en el canal privado Cuatro.Facultad de Periodismo y Comunicación Socia

La inclusión de publicidad en informativos: el caso de <i>Deportes Cuatro</i>

El nacimiento de nuevos canales y el desarrollo y la expansión de medios de comunicación como Internet han llevado a la televisión a repensar la forma de hacer publicidad. A los ya tradicionales spots, patrocinios o publirreportajes entre otros, se han ido sumando, de forma paulatina, formatos publicitarios alternativos que tratan de evitar la fuga de espectadores. La necesidad de financiamiento ha hecho que espacios antes exentos de publicidad estén ahora colmados de anuncios que, como en el caso de los informativos deportivos españoles, sacan provecho de unos elevados índices de audiencia, una franja horaria atractiva, un público concreto y unos valores de credibilidad, seriedad y fiabilidad asociados al informativo como estrategia para atraer al anunciante. Por esta razón, en el presente artículo estableceremos qué tipo de publicidad emiten, a qué formatos se corresponde, de qué forma se hace y cómo se muestra esta a una audiencia cada vez más segmentada y exigente en el canal privado Cuatro.Facultad de Periodismo y Comunicación Socia

La organización de eventos como estrategia de relaciones públicas : El caso del Festival de Cans

Los eventos se han convertido en una herramienta fundamental de las relaciones públicas para dar a conocer una ciudad, promocionarla y atraer a un determinado público. Son actuaciones planificadas, centradas en una comunicación bidireccional de la que se espera un resultado concreto que hay que analizar con posterioridad a su ejecución. Teniendo en cuenta su importancia, la presente investigación se centra en el Festival de Cans, un evento de cine y música que se celebra de forma anual desde 2004 en Cans, una parroquia que apenas ronda los 500 habitantes y que pertenece al municipio de O Porriño, en Pontevedra (Galicia). Por ello, en esta investigación se analizarán las estrategias comunicativas y la importancia de la creación de una marca ciudad concreta en torno a los valores locales como claves de éxito para dar a conocer un territorio.Facultad de Periodismo y Comunicación Socia

Influence of pH and temperature in the performance of Zn phosphate conversion coatings

Financiado para publicación en acceso aberto: Universidade de Vigo/CISUGThe influence of variations in temperature (from 50 ◦C to 70 ◦C) and pH (2.4 and 2.9) in the Zn phosphate conversion treatment of a high-strength steel was assessed in this study. The effect of the temperature changes depends on the pH of the bath. The results evidenced an enhanced corrosion resistance with the increased temperature for baths at pH 2.4, whereas no relevant differences were concluded for baths at pH 2.9. This latter pH condition provided a better surface coverage, even with lower coating masses, than the former value. The microstructural analysis showed the development of films composed of smaller crystals for the treatments at pH 2.9. Impedance spectroscopy was established as a powerful tool with great potential for characterising phosphate layers. The accuracy of this methodology greatly depends on the equivalent circuit used for the simulation. A model based on the transmission line allows the reliable estimation of the percentage of exposed area (coating efficiency), the identification of changes in the film conductivity, and the qualitative analysis of its structureXunta de Galicia | Ref. ED431B2021/1

A922 Sequential measurement of 1 hour creatinine clearance (1-CRCL) in critically ill patients at risk of acute kidney injury (AKI)

Meeting abstrac

Elective cancer surgery in COVID-19-free surgical pathways during the SARS-CoV-2 pandemic: An international, multicenter, comparative cohort study

PURPOSE As cancer surgery restarts after the first COVID-19 wave, health care providers urgently require data to determine where elective surgery is best performed. This study aimed to determine whether COVID-19–free surgical pathways were associated with lower postoperative pulmonary complication rates compared with hospitals with no defined pathway. PATIENTS AND METHODS This international, multicenter cohort study included patients who underwent elective surgery for 10 solid cancer types without preoperative suspicion of SARS-CoV-2. Participating hospitals included patients from local emergence of SARS-CoV-2 until April 19, 2020. At the time of surgery, hospitals were defined as having a COVID-19–free surgical pathway (complete segregation of the operating theater, critical care, and inpatient ward areas) or no defined pathway (incomplete or no segregation, areas shared with patients with COVID-19). The primary outcome was 30-day postoperative pulmonary complications (pneumonia, acute respiratory distress syndrome, unexpected ventilation). RESULTS Of 9,171 patients from 447 hospitals in 55 countries, 2,481 were operated on in COVID-19–free surgical pathways. Patients who underwent surgery within COVID-19–free surgical pathways were younger with fewer comorbidities than those in hospitals with no defined pathway but with similar proportions of major surgery. After adjustment, pulmonary complication rates were lower with COVID-19–free surgical pathways (2.2% v 4.9%; adjusted odds ratio [aOR], 0.62; 95% CI, 0.44 to 0.86). This was consistent in sensitivity analyses for low-risk patients (American Society of Anesthesiologists grade 1/2), propensity score–matched models, and patients with negative SARS-CoV-2 preoperative tests. The postoperative SARS-CoV-2 infection rate was also lower in COVID-19–free surgical pathways (2.1% v 3.6%; aOR, 0.53; 95% CI, 0.36 to 0.76). CONCLUSION Within available resources, dedicated COVID-19–free surgical pathways should be established to provide safe elective cancer surgery during current and before future SARS-CoV-2 outbreaks

Elective Cancer Surgery in COVID-19-Free Surgical Pathways During the SARS-CoV-2 Pandemic: An International, Multicenter, Comparative Cohort Study.

PURPOSE: As cancer surgery restarts after the first COVID-19 wave, health care providers urgently require data to determine where elective surgery is best performed. This study aimed to determine whether COVID-19-free surgical pathways were associated with lower postoperative pulmonary complication rates compared with hospitals with no defined pathway. PATIENTS AND METHODS: This international, multicenter cohort study included patients who underwent elective surgery for 10 solid cancer types without preoperative suspicion of SARS-CoV-2. Participating hospitals included patients from local emergence of SARS-CoV-2 until April 19, 2020. At the time of surgery, hospitals were defined as having a COVID-19-free surgical pathway (complete segregation of the operating theater, critical care, and inpatient ward areas) or no defined pathway (incomplete or no segregation, areas shared with patients with COVID-19). The primary outcome was 30-day postoperative pulmonary complications (pneumonia, acute respiratory distress syndrome, unexpected ventilation). RESULTS: Of 9,171 patients from 447 hospitals in 55 countries, 2,481 were operated on in COVID-19-free surgical pathways. Patients who underwent surgery within COVID-19-free surgical pathways were younger with fewer comorbidities than those in hospitals with no defined pathway but with similar proportions of major surgery. After adjustment, pulmonary complication rates were lower with COVID-19-free surgical pathways (2.2% v 4.9%; adjusted odds ratio [aOR], 0.62; 95% CI, 0.44 to 0.86). This was consistent in sensitivity analyses for low-risk patients (American Society of Anesthesiologists grade 1/2), propensity score-matched models, and patients with negative SARS-CoV-2 preoperative tests. The postoperative SARS-CoV-2 infection rate was also lower in COVID-19-free surgical pathways (2.1% v 3.6%; aOR, 0.53; 95% CI, 0.36 to 0.76). CONCLUSION: Within available resources, dedicated COVID-19-free surgical pathways should be established to provide safe elective cancer surgery during current and before future SARS-CoV-2 outbreaks