The nonlinear seismic response of tall shear wall structures

New building codes are tending to place considerable value on the use of deterministic dynamic analyses as a means of assessing the ability of engineering structures to withstand severe seismic ground motions. An investigation of the more important factors affecting such an analysis, derived specifically for tall ductile shear walls, was undertaken. Initial considerations included the selection, and the derivation where necessary, of suitable structural idealisations, material constitutive relationships and numerical integration schemes, leading to an analysis which was sufficiently representative and economically viable. The basic problem of program verification followed. Difficulties in ensuring that reliable accurate results were being obtained arose when certain types of structural idealisation and integration procedures were used. When these problems, which initially handicapped confident application of the program, had been satisfactorily resolved a sensitivity study of a realistic structure was performed. Results presented illustrate important characteristics of structural behaviour and the capabilities of the implemented analysis. Because it is vital that theoretical idealisations of reinforced concrete components should be based on experimental evidence, the case of slab coupling of shear walls was investigated with a sequence of reinforced concrete models. Interest was first concentrated on aspects of slab design, especially the control of punching shear within the range of deformations likely to occur in a seismic disturbance. Limited attempts were made to match standard idealised hysteretic relationships to the experimental responses to allow an improved dynamic analysis of structures incorporating these components. Finally, a pilot test of a slab coupling unit with a monolithically cast shallow beam was performe

Characterization of Dobsons instruments within EMRP ATMOZ Project

Presentación realizada en: ATMOZ workshop at 11th RBCC-E, celebrado en El Arenosillo, Huelva, el 1 de junio de 2017

Recanalization strategies in childhood stroke in Germany

Childhood arterial ischemic stroke (CAIS) is a rare event. Diverse etiologies, risk factors, symptoms and stroke mimics hamper obtaining a fast diagnosis and implementing immediate recanalization strategies. Over a period of 3~years (2015-2017), the data of 164 pediatric patients (> 28~days of life-18~years) with a first episode of AIS were submitted to a hospital-based nationwide surveillance system for rare disorders (ESPED). We report a subgroup analysis of patients who have undergone recanalization therapy and compare these data with those of the whole group. Twenty-eight patients (17%) with a median age of 12.2~years (range 3.3-16.9) received recanalization therapy. Hemiparesis, facial weakness and speech disturbance were the main presenting symptoms. The time from onset of symptoms to confirmation of diagnosis was significantly shorter in the intervention group (4.1~h vs. 20.4~h, p ≤ 0.0001). Only in one patient occurred a minor bleed. Cardiac disease as predisposing risk factor was more common in the recanalization group. Recanalization therapies are feasible and increasingly applied in children with AIS. High awareness, timely diagnosis and a large amount of expertise may improve time to treatment and make hyperacute therapy an option for more patients

Muscle-tendon unit parameter estimation of a Hill-type musculoskeletal model based on experimentally obtained subject-specific torque profiles.

The aim of this study was to generate a subject-specific musculoskeletal muscle model, based on isometric and isovelocity measurements of the whole lower extremity. A two-step optimisation procedure is presented for optimising the muscle-tendon parameters for isometric and isovelocity joint torque profiles. A significant improvement in the prediction of joint torque profiles for both the solely isometric and a combined isometric and dynamic method of optimization when compared to the standard scaling method of The AnyBody Modeling System was observed. Depending on the specific purpose of the model, it may be worth considering whether the isometric-only would be sufficient, or the additional dynamic data are required for the combined approach.N/

Research products across space missions: a prototype for central storage, visualization and usability

For planetary sciences, the main archives to archived access to mission data are ESA's Planetary Science Archive (PSA) and the Planetary Data System (PSA) nodes in the USA. Along with recent and upcoming planetary missions the amount of different data (remote sensing/in-situ data, derived products) increases constantly and serves as basis for scientific research resulting in derived scientific data and information. Within missions to Mercury (BepiColombo), the Outer Solar System moons (JUICE), and asteroids (NASA`s DAWN), one way of scientific analysis, the systematic mapping of surfaces, has received new impulses, also in Europe. These systematic surface analyses are based on the numeric and visual comparison and combination of different remote sensing data sets, such as optical image data, spectral-/hyperspectral sensor data, radar images, and/or derived products like digital terrain models. The analyses mainly results in map figures, data, and profiles/diagrams, and serves for describing research investigations within scientific publications