Search results for "Axia"
showing 10 items of 638 documents
Feasibility of Implantable Cardioverter Defibrillator Treatment in Five Patients With Familial Friedreich's Ataxia-A Case Series
2010
Friedreich's ataxia (FRA) is an autosomal recessive disease of the central nervous system that is associated with familial cardiomyopathy. Cardiac involvement is seen in more than 90% of the patients and is the most common cause of death in these patients. We present a case series and discuss the indications for implantable cardioverter defibrillator (ICD) implantation in FRA with review of the literature. Five pediatric patients who suffer from FRA (four female and one male, mean age 17.4 years) underwent ICD implantation between 2007 and 2008 in the University Hospital of Goettingen. The diagnosis of FRA was established by standard clinical criteria and proven in each case by genotyping a…
Biomechanics of human ascending aorta and aneurysm rupture risk assessment
2021
Ascending aortic aneurysms (AsAA) and aortic dissections are life-threatening cardiovascular diseases. The main criteria for determining surgical intervention of AsAA are the maximum diameter or the increasing annual rate of the aneurysm. The mortality of the untreated aortic dissection can be 21% to 74%, depending on the delay of hospital admission.Our study aims to characterize the biomechanical properties of the ascending aorta and propose a patient-specific approach to assess the risks of rupture. The purpose of this PhD work is multifold.On the one hand, biaxial tensile tests were performed on AsAA samples obtained from one hundred patients with surgery of AsAA. The impact on the diffe…
Experimental Studies Regarding Mechanical Behaviour of Textile Reinforcements Laminated Composite Materials
2013
The aim of this paper is to determine the mechanical properties of textile reinforcements laminated composite material and to establish the influence of thickness about these properties. The composite material used for this is a laminated sheet of HGW 2082. In order to study the mechanical behaviour of these kinds of materials we select two experimental tests: uniaxial test and bending test. For the uniaxial test we have measured the maximum load, the maximum extension, the maximum tensile stress and the maximum tensile strain. Also, using an optical extensometer we measured the major and the minor strains. For the bending test we measured the maximum load and the maximum bending deflection…
Historia poliittisen maailmankatsomuksen palveluksessa : Tianxia-teoria ja kiinalainen poliittinen kosmologia
2017
Kiina vahvistuu sekä taloudellisesti että poliittisesti, mutta pyrkii enenevissä määrin vaikuttamaan myös maailman ideologiseen ilmapiiriin. Kiinalaiset maailmanpolitiikan tutkijat pohtivat nyt voisiko Kiinan historiasta löytyä aineksia uudenlaiseen maailmanpoliittiseen teoriaan, joka vastaisi paremmin globalisaation aikakauden ylikansallisiin haasteisiin. peerReviewed
Overexpression of Human and Fly Frataxins in Drosophila Provokes Deleterious Effects at Biochemical, Physiological and Developmental Levels
2011
10 pages, 5 figures. 21779322[PubMed] PMCID: PMC3136927
A free plate model can predict guided modes propagating in tubular bone-mimicking phantoms
2014
The goal of this work was to show that a non-absorbing free plate model can predict with a reasonable accuracy guided modes measured in bone-mimicking phantoms that have circular cross-section. Experiments were carried out on uncoated and coated phantoms using a clinical axial transmission setup. Adjustment of the plate model to the experimental data yielded estimates for the waveguide characteristics (thickness, bulk wave velocities). Fair agreement was achieved over a frequency range of 0.4 to 1.6 MHz. A lower accuracy observed for the thinnest bone-mimicking phantoms was caused by limitations in the wave number measurements rather than by the model itself.
Estudio del déficit de frataxina en Drosophila
2015
La ataxia de Friedreich (AF) es la ataxia hereditaria más común en la población de origen europeo, con una prevalencia de 2-4:100.000 (Palau y Espinós 2006). Se trata de una enfermedad neurodegenerativa que afecta principalmente al sistema nervioso central y periférico. Además de los síntomas neurológicos, los pacientes presentan cardiomiopatía hipertrófica, que constituye la causa frecuente de muerte prematura. También pueden presentar intolerancia a carbohidratos y diabetes mellitus en un 20% y 10% de los casos respectivamente. Actualmente no se dispone de cura ni de tratamiento efectivo para la enfermedad, pero diversas estrategias terapéuticas se encuentran en proceso de investigación y…
Estudio del tamaño de cristalito en porcelanas industriales.
2016
El objetivo de la presente tesis en el estudio mediante técnicas de difracción de rayos X, con el apoyo en microscopía electrónica, de la microestructura de la mullita que se desarrolla en porcelanas industriales de formulación triaxial (caolín, feldespato y cuarzo). La porcelana es un material de gran importancia en la industria debido a su uso en campos tecnológicamente muy diversos, tales como la cerámica ornamental, pavimento y revestimiento, aisladores eléctrico o piezas resistentes a agentes físicos y químicos tales como material de laboratorio o partes de motores. Pese a estas características tecnológicas la porcelana ha sido poco estudiada desde el punto de vista científico, si bien…
Developmental Coordination Disorder, Historical Beginnings and Development
2015
<p><em>This article contains theoretical analysis about Developmental Coordination Disorder historical evolution. Studies include a wide variation in terminology and criteria to describe . Developmental Coordination Disorder. Developmental Coordination Disorder is a complex neurological condition, which affects muscle coordination and perception.</em></p>
On Bifurcation Analysis of Implicitly Given Functionals in the Theory of Elastic Stability
2015
In this paper, we analyze the stability and bifurcation of elastic systems using a general scheme developed for problems with implicitly given functionals. An asymptotic property for the behaviour of the natural frequency curves in the small vicinity of each bifurcation point is obtained for the considered class of systems. Two examples are given. First is the stability analysis of an axially moving elastic panel, with no external applied tension, performing transverse vibrations. The second is the free vibration problem of a stationary compressed panel. The approach is applicable to a class of problems in mechanics, for example in elasticity, aeroelasticity and axially moving materials (su…