Search results for "re-entry"

Neuronal cell cycle: the neuron itself and its circumstances.

2015

Neurons are usually regarded as postmitotic cells that undergo apoptosis in response to cell cycle reactivation. Nevertheless, recent evidence indicates the existence of a defined developmental program that induces DNA replication in specific populations of neurons, which remain in a tetraploid state for the rest of their adult life. Similarly, de novo neuronal tetraploidization has also been described in the adult brain as an early hallmark of neurodegeneration. The aim of this review is to integrate these recent developments in the context of cell cycle regulation and apoptotic cell death in neurons. We conclude that a variety of mechanisms exists in neuronal cells for G1/S and G2/M check…

The Legacy and the Tyranny of Time: Exit and Re-Entry of Sovereigns to International Capital Markets

2018

We use a novel continuous-time Weibull model (without and) with a change-point in the duration dependence parameter to investigate the duration of the exit and re-entry of sovereigns to international capital markets. Relying on annual data for a large panel of countries over the period 1970-2011, we find that, as the reputation of debtor countries as good (bad) borrowers solidifies over time, those episodes are more likely to end - i.e. the "legacy of time". Debtor countries can take advantage of the "benefit of doubt" of creditors during short exit spells. However, when exits are long and the reputation as a bad borrower emerges, no more "complacency" makes it more difficult for them to bo…

A re-entry tachycardia triggered by the spontaneous interruption of an atrial tachycardia.

2015

The common atrioventricular nodal re-entry tachycardia is the most common form of paroxysmal supraventricular tachycardia. It starts frequently with a supraventricular ectopic beat that, on finding the fast pathway in refractory period, travels in the slow pathway as to appear as a prolongation of the PR interval on the ECG. In this study, we show a singular case of a common atrioventricular nodal re-entry tachycardia triggered by the spontaneous interruption of an atrial tachycardia.

Machine Learning Identification of Pro-arrhythmic Structures in Cardiac Fibrosis

2021

Cardiac fibrosis and other scarring of the heart, arising from conditions ranging from myocardial infarction to ageing, promotes dangerous arrhythmias by blocking the healthy propagation of cardiac excitation. Owing to the complexity of the dynamics of electrical signalling in the heart, however, the connection between different arrangements of blockage and various arrhythmic consequences remains poorly understood. Where a mechanism defies traditional understanding, machine learning can be invaluable for enabling accurate prediction of quantities of interest (measures of arrhythmic risk) in terms of predictor variables (such as the arrangement or pattern of obstructive scarring). In this st…

Méthodes géometriques en mécanique spatiale et aspects numériques

2005

We present in this thesis two research projectson the optimal control of the space vehicles.In the first, we have dealt with the orbit transferproblem. We study the minimum time control of a satellite that we want to reach a geostationary orbit. Our contribution is of two kinds. Geometric, first, since we study the controllability of the system together with the geometry of the transfer (structure of the command) by means of geometric control without state constraint tools (minimum principle). Then we present shootingalgorithm and homotopy method. These approaches allow the numerical resolution of problems with strong or low thrust satellites.The second project concerns to the calculation o…

The effects of short-term sojourn experiences on adolescents : five narratives of adolescent Finnish students in a comenius project: EU & I

2012

Tutkimuksessani tarkastelen lyhytaikaisen ulkomailla oleskelun vaikutuksia viiteen suomalaiseen alakouluikäiseen oppilaaseen. Oppilaiden kokemukset karttuivat Comenius projektissa EU ja minä. Kaikki viisi haastateltua lasta olivat oppilaina samassa Pohjois-Pohjanmaalla sijaitsevassa koulussa, ja osallistuivat samoille kolmeen eri EU-maahan suuntautuneille opintomatkoille. Kaikki oppilaat matkustivat oppilasparin kanssa, ja kokivat samantyyppisiä tapahtumia. Neljä viidestä tutkimukseen osallistuneesta oppilaasta isännöi perheessään ulkomaalaista oppilasta, ja tutkin myös heidän mahdollisia positiivisia kokemuksiaan isännöinnistä. Tutkimukseni lähdekirjallisuutena ja vertailuaineistona käytän…

The ECHR Condemns Prison Overcrowding in Italy: The Total Reorganization of the Institution and the Social Reintegration of the Prisoner

2017

The contribution analyses the current Italian prison system, which has been called upon on to resolve its structural problems. The Council of Europe, in fact, in 2013 condemned Italy for inhuman treatment in its prisons. The principal accusation concerns the problem of overcrowding. The country has responded with solutions such as the application of the open system, which provides cells solely for overnight stays, and dynamic monitoring, an effective system for ensuring order in the institutions. These initiatives aim to promote re-educational activities and the social re-integration of prisoners. In addition, Italian institutions have made greater use of alternatives to custodial penalties…

Why am I an alien in my own country? : communication problems that Finnish higher education level students encounter when returning to their home cou…

2007

Perceptions of sport injuries of young elite swimmers

2012

Mari Lehtinen, 2012. Perceptions of sport injuries of young elite swimmers. Department of Sport Sciences. University of Jyväskylä. Master’s Thesis of Sport and Exercise Psychology. 64 pages. Sport injuries occur at all levels of sport. Sport injury can limit or end athlete´s career. It is important to find out ways how sport psychology can prevent and treat sport in juries. This can be done for example, by having impacts on mental and physical capabilities of athletes. Aim was to study rehabilitation process of injured swimmers according to the sport psychology point of view. The aim was to study experiences of elite swimmers during recovery process. Secondly, this study helped to describe …