Search results for "Theorie"
showing 10 items of 354 documents
Editorial: The Future of Nuclear Structure: Challenges and Opportunities in the Microscopic Description of Nuclei
2021
The past two decades have witnessed tremendous progress in the microscopic description of atomic nuclei. The Topical Review `The Future of Nuclear Structure' aims at summarizing the current state-of-the-art microscopic calculations in Nuclear Theory and to give a useful reference for young researches who wish to learn more about this exciting discipline.
Spatial risks and complex systems: methodological perspectives
2007
Research on risk and industrial catastrophes question the complexity theories. Besides the concepts of complexity which lead us to reconsider concepts of risk, hazard and vulnerability, we propose to think about more practical aspects, for example the modelling of human behaviour in crisis situations. The link between concepts as critical self-organization, emergence, bifurcation, and the methods in the Distributed Artificial Intelligence (DAI) used to model them is however difficult. In this paper, we present ongoing analysis on the key concepts of risk science, such as hazards and catastrophes. We propose to enrich them with complex systems theories. First, we present methodological persp…
Early Universe Higgs dynamics in the presence of the Higgs-inflaton and non-minimal Higgs-gravity couplings
2017
Apparent metastability of the electroweak vacuum poses a number of cosmological questions. These concern evolution of the Higgs field to the current vacuum, and its stability during and after inflation. Higgs-inflaton and non-minimal Higgs-gravity interactions can make a crucial impact on these considerations potentially solving the problems. In this work, we allow for these couplings to be present simultaneously and study their interplay. We find that different combinations of the Higgs-inflaton and non-minimal Higgs-gravity couplings induce effective Higgs mass during and after inflation. This crucially affects the Higgs stability considerations during preheating. In particular, a wide ra…
Observational signatures of Higgs inflation
2016
We investigate the dependency of Higgs inflation on the non-renormalisable matching between the low energy Standard Model limit and the inflationary regime at high energies. We show that for the top mass range $m_t \gtrsim 171.8$ GeV the scenario robustly predicts the spectral index $n_s \simeq 0.97$ and the tensor-to-scalar ratio $r\simeq 0.003$. The matching is however non-trivial, even the best-fit values $m_h=125.09$ GeV and $m_t=173.21$ GeV require a jump $\delta \lambda \sim 0.01$ in the Higgs coupling below the inflationary scale. For $m_t\lesssim 171.8$ GeV, the matching may generate a feature in the inflationary potential. In this case the predicted values of $n_s$ and $r$ vary but…
Fostering creative thinking : the role of primary teachers
2014
Τα τελευταία χρόνια παρατηρείται μια αυξανόμενη απαίτηση για δημιουργικότητα σε όλους τους τομείς της ανθρώπινης δραστηριότητας. Η πρωτοβάθμια εκπαίδευση πασχίζει να συμβαδίσει με τις νέες κοινωνικοοικονομικές ανάγκες και να προετοιμάσει τους δημιουργικούς πολίτες του μέλλοντος. Αν και οι εκπαιδευτικοί της πρωτοβάθμιας εκπαίδευσης παίζουν καθοριστικό ρόλο, άλλοτε θετικό και άλλοτε αρνητικό, στην καλλιέργεια της δημιουργικότητας των μαθητών, λίγες έρευνες έχουν διεξαχθεί σχετικά με τη συμβολή τους στην καλλιέργεια της δημιουργικής σκέψης των μαθητών και τις απόψεις τους για το θέμα αυτό. Η θεμελιωμένη γνώση (situated knowledge) των Ελλήνων εκπαιδευτικών πρωτοβάθμιας εκπαίδευσης και η εμπειρί…
Parts and wholes in Aristotle's conception of substance
2012
Disertācijā "Daļas un veselumi Aristoteļa substances koncepcijā" autore parāda, ka vairāku 'daļas' un 'veseluma' nozīmju nošķīrums atrisina substances (οὐσία) vienības problēmu. Lai gan problēma un arī risinājums ir Aristoteļa, viņš šim jautājumam nevelta atsevišķu izklāstu. Disertācija piedāvā detalizētu substances vienības problēmas analīzi, izmantojot instrumentus, kas darināti, ņemot vērā Aristoteļa piezīmes par daļām un veselumiem, t. i., mereoloģiju (no μέρος – 'daļa'). Izpētes centrā ir salikta (sajūtama vai vieliska) substance. Autore aizstāv vairākus Aristoteļa pētniecībā strīdīgus apgalvojumus (uzskatu, ka daļas–veseluma attiecībai (part–whole relation) ir vairākas nozīmes, priekš…
Reading-related Cognitive Deficits in Spanish Developmental Dyslexia
2014
Abstract Spanish-speaking children learn to read words written in a relatively transparent orthography. Variations in orthographic transparency may shape the manifestation of reading difficulties. This study was intended to help clarify the nature of developmental dyslexia in Spanish. Developmentally Dyslexic children (DD) were compared to a chronological age-matched control group (CA). Measures included rapid automated naming, verbal working memory, phonological short-term memory, and phonemic awareness. Results demonstrated that developmental dyslexics show reading-related cognitive deficits in areas such as naming speed, verbal working memory, phonological short-term memory, and phonemic…
Early signs of dyslexia from the speech and language processing of children
2009
The Jyvaskyla Longitudinal Study of Dyslexia project (JLD) has followed the development of 200 children from birth until 10 years of age. Half the children are from families in which at least one of the parents has dyslexia, thus the child has a high risk of becoming dyslexic, and half have no such risk. Here the main findings of four studies in linguistics from the JLD project are reviewed. The speech processing skills were studied in 6, 18, 24 and 30-month-old children. The findings show that early signs of dyslexia can be detected in speech processing both phonologically and morphosyntactically. These precursors can be seen in perception or production of duration, in the prosody and phon…
The ATLAS Inner Detector commissioning and calibration
2010
The ATLAS Inner Detector is a composite tracking system consisting of silicon pixels, silicon strips and straw tubes in a 2 T magnetic field. Its installation was completed in August 2008 and the detector took part in data-taking with single LHC beams and cosmic rays. The initial detector operation, hardware commissioning and insitu calibrations are described. Tracking performance has been measured with 7.6 million cosmic-ray events, collected using a tracking trigger and reconstructed with modular pattern-recognition and fitting software. The intrinsic hit efficiency and tracking trigger efficiencies are close to 100%. Lorentz angle measurements for both electrons and holes, specific energ…
Dynamical formation of a Reissner-Nordström black hole with scalar hair in a cavity
2016
In a recent Letter [Sanchis-Gual et al., Phys. Rev. Lett. 116, 141101 (2016)], we presented numerical relativity simulations, solving the full Einstein--Maxwell--Klein-Gordon equations, of superradiantly unstable Reissner-Nordstr\"om black holes (BHs), enclosed in a cavity. Low frequency, spherical perturbations of a charged scalar field trigger this instability. The system's evolution was followed into the nonlinear regime, until it relaxed into an equilibrium configuration, found to be a hairy BH: a charged horizon in equilibrium with a scalar field condensate, whose phase is oscillating at the (final) critical frequency. Here, we investigate the impact of adding self-interactions to the …