Mooring System Diagnosis and Structural Reliability Control for Position Moored Vessels

Early diagnosis and fault-tolerant control are essential for safe operation of floating platforms where mooring systems maintain vessel position and must withstand environmental loads. This paper considers two critical faults, line breakage and loss of a buoyancy element and employs vector statistical change detection for timely diagnosis of faults. Diagnosis design is scrutinized and a procedure is proposed based on specified false alarm probability and estimation of the distribution of the test statistics on which change detection is based. A structural reliability index is applied for monitoring the safety level of each mooring line and, a set-point chasing algorithm accommodates the effects of line failure, as an integral part of the reliability-based set-point chasing control algorithm. The feasibility of the diagnosis and of the fault-tolerant control strategy is verified in model basin tests

Modelling of Multibody Marine Systems with Application to Wave-Energy Devices

Time-domain modelling of wave-energy devices is important. This is due to the need for information on the device’s transient response characteristics; even when linear potential theory is assumed when modelling hydrodynamic loads, significant non-linearities may be present in the system due to the power-take off (PTO), mooring, and control subsystems. In this paper, an approach for modelling multibody marine systems is presented. The Newton-Euler equations with eliminated constraints (NE-EC) are utilised to capture the rigid body dynamics of the constrained multibody system. This results in the convenient integration of active loads (as opposed to interbody constraint forces) acting on the multibody system. In this paper, the active loads considered are: hydrodynamic, PTO, and mooring load

Periodontal inflamed surface area mediates the link between homocysteine and blood pressure

Here, we assess the association between homocysteine (Hcy) serum levels and periodontal status in a large representative sample of the National Health and Nutrition Examination Survey (NHANES). Using the 2001–2002 and 2003–2004 NHANES databases, participants with a periodontal examination, medical self-reported data, blood pressure (BP) and blood samples to determine complete blood count, C-reactive protein (CRP) and Hcy levels. We then calculated the periodontal inflamed surface area (PISA) and the periodontal epithelial surface area (PESA). Multivariable regression analysis explored the association between Hcy, periodontal measures and BP. Mediation analysis was performed to understand the effect of PISA and PESA in the link between Hcy and BP. 4021 participants fulfilled the inclusion criteria. Hcy levels showed significant correlations with systolic BP, diastolic BP, PISA, PESA and age. PESA showed to be significantly associated with Hcy both for the crude and adjusted models (p 0.05). In the association of Hcy with systolic BP, PISA significantly mediated 17.4% and PESA 0.9%. In the association of Hcy with diastolic BP, PISA significantly mediated 16.3% and PESA 47.2%. In conclusion, Hcy and periodontitis are associated. Further, both PISA and PESA significantly mediated the association of Hcy with systolic BP and diastolic BP. Future studies shall deepen the mechanisms by which Hcy levels increase in a clinical situation of periodontitis

El ejército sublevado y sus combatientes en la Guerra Civil española, 1936-1939

El artículo pretende mostrar las medidas desarrolladas por el ejército sublevado durante la Guerra Civil española. Unas medidas que fueron progresivamente endureciéndose, hasta llegar a su punto con el primer gobierno franquista. Estas políticas se basaban en la integración, vigilancia y castigo. La vigilancia y el castigo se aplicaron porque la tropa no era homogénea sociopolíticamente. Por este motivo, conociendo las medidas de coerción y cohesión, se estudiaron las actitudes sociales de los soldados de recluta, mayoría dentro del ejército insurgente. Unas actitudes diversas y que en todos los casos no deben entenderse de un modo ideológico, sino producto de un cansancio físico y mental hacia la guerra. Especialmente el segundo, pues en la guerra civil los soldados forzosos fueron víctimas y verdugos

Transmisor electrónico universal inteligente y adaptativo orientado a un rango extenso de aplicaciones industriales

Programa Oficial de Doutoramento en Enxeñaría Marítima. 550V01[Resumen] El presente trabajo de investigación muestra un modelo de transmisor industrial, electrónico, universal e inteligente, que pretende abarcar un alto espectro dentro del campo de las comunicaciones industriales digitales. El modelo se implementa físicamente en base a un microcontrolador, un módulo de comunicaciones y un amplificador de instrumentación programable -entre otros elementos- que lo convierten en un transmisor versátil y flexible , adaptado a todo tipo de medidas físicas, en base a un software abierto y un hardware enfocado al correcto acondicionamiento de las señales de entrada. Las ventajas de este transmisor, respecto a otros de la misma naturaleza radican en su naturaleza multivariable, su universalidad, capacidad de adaptación y escalabilidad.[Resumo] O presente traballo de investigación, mostra un modelo de transmisor industrial, electrónico, universal e intelixente, que pretende abarcar un amplo espectro no ámbito das comunicacións dixitais industriais. O modelo impleméntase en base a un microcontrolador, un módulo de comunicación e un amplificador de instrumentación programable, entre outros elementos, que fan del un transmisor versátil e flexible, adaptado a todo tipo de medidas físicas, en base a un software aberto e un hardware centrado no condicionamento correcta dos sinais de entrada. As vantaxes deste transmisor con respecto aos outros da mesma natureza radican na súa natureza multivariante e a súa universalidade, adaptabilidade e escalabilidade.[Abstract] This research shows a model of industrial, electronic, universal and intelligent transmitter, which intended to encompass a wide spectrum in the field of industrial digital communications. The model to a microcontroller, a communications module and programmable instrumentation amplifier, among other elementsthat make it a versatile and flexible transmitter, adapted to all types of physical measurements, based on an open software is physically implemented on the basis and hardware focused on the correct conditioning of the input signals. The advantages of this transmitter with respect to others of the same nature multivariable lie in its nature, its universality, adaptability and scalability

Subgingival Instrumentation for Treatment of Periodontitis. A Systematic Review

OBJECTIVES: To evaluate the efficacy of subgingival instrumentation (PICOS-1), sonic/ultrasonic/hand instruments (PICOS-2) and different subgingival instrumentation delivery protocols (PICOS-3) to treat periodontitis. METHODS: Systematic electronic search (CENTRAL/MEDLINE/EMBASE/SCOPUS/LILACS) to March 2019 was conducted to identify randomized controlled trials (RCT) reporting on subgingival instrumentation. Duplicate screening and data extraction were performed to formulate evidence tables and meta-analysis as appropriate. RESULTS: As only one RCT addressed the efficacy of subgingival instrumentation compared to supragingival cleaning alone (PICOS-1), baseline and final measures from 11 studies were considered. The weighted pocket depth (PD) reduction was 1.7 mm (95%CI: 1.3-2.1) at 6/8 months and the proportion of pocket closure was estimated at 74% (95%CI: 64-85). Six RCTs compared hand and sonic/ultrasonic instruments for subgingival instrumentation (PICOS-2). No significant differences were observed between groups by follow-up time point or category of initial PD. Thirteen RCTs evaluated quadrant-wise vs full-mouth approaches (PICOS-3). No significant differences were observed between groups irrespective of time-points or initial PD. Five studies reported patient-reported outcomes, reporting no differences between groups. CONCLUSIONS: Nonsurgical periodontal therapy by mechanical subgingival instrumentation is an efficacious means to achieve infection control in periodontitis patients irrespective of the type of instrument or mode of delivery. Prospero ID:CRD42019124887

El terror represivo y el reclutamiento forzoso del ejército golpista. El caso de Galicia, 1936-1939 = The repressive terror and the forced recruitment of the coup army. The case of Galicia, 1936-1939

Resumen: El golpe de Estado vino acompañado de una cruel represión. Este es un asunto que ha sido ampliamente estudiado por la historiografía española. Sin embargo, los reclutas que tuvieron que ir a combatir de manera forzosa con los insurgentes han recibido escasa atención. Con este artículo se pretende ofrecer otro punto de vista de la represión, analizar cómo pudo afectar al proceso movilizador de un contingente bélico y examinar el sometimiento en Galicia, poniendo el foco en la preparación de la contienda. Como primer avance, el control se realizó primero en las ciudades, en concreto, en la fachada atlántica, permitiendo que se pudiera formar una sociedad de prófugos en los lugares donde no llegó el poder en los primeros meses. Asimismo, el grueso del alistamiento se realizó en los años 1936 y 1937 en Galicia, coincidiendo con los meses de mayor repunte de la coacción. El texto cronológicamente termina cuando aprueban en marzo de 1936 la creación del cuerpo de vigilancia perteneciente al ejército y la dominación comenzó a ser más sistemática y calculadora.Palabras clave: guerra civil española, terror represivo, reclutamiento forzado, huidos, control político.Abstract: The coup d'état was accompanied by a cruel repression. This is an issue that has been widely studied by Spanish historiography. However, the recruits who had to go to combat with the insurgents have received little attention. This article aims to offer another point of view of the repression and analyze how it could affect the mobilizing process of a war contingent and examine the phenomenon of submission in Galicia, focusing on the preparation of the war. The first conclusions were drawn that the control was first carried out in the large cities, specifically, on the Atlantic façade, allowing a kind of fugitive society to be formed in the places where the coup power did not arrive in the first months. Likewise, it is observed how the bulk of the unappealable enlistment was carried out in the years 1936 and 1937 in Galicia, coinciding with the months of greatest recovery of coercion. When the regime approved in March 1936 the creation of the surveillance corps belonging to the army, the domination began to be more systematic and calculating.Keywords: Spanish civil war, repressive terror, forced recruitment, fleeing, political control