Search results for "non-Standard"
showing 10 items of 33 documents
Flexibly scheduled early childhood education and care: experiences of Finnish parents and educators
2017
This study focuses on flexibly scheduled early childhood education and care (ECEC), an institutional childcare service for Finnish families where both parents, or a single parent, work non-standard hours. Although many countries nowadays offer extended hours day care, only Finland has a publicly provided, law-based system guaranteeing ECEC during non-standard as well as standard hours. We explore, drawing on parental survey data, what kinds of families use such services and when. Furthermore, we utilise web-survey data obtained from early educators to find out what they report as the main challenges involved in implementing flexibly scheduled ECEC. The results showed that single-parent fami…
Neutrino transition magnetic moments within the non-standard neutrino-nucleus interactions
2015
Tensorial non-standard neutrino interactions are studied through a combined analysis of nuclear structure calculations and a sensitivity $\chi^2$-type of neutrino events expected to be measured at the COHERENT experiment, recently planned to operate at the Spallation Neutron Source (Oak Ridge). Potential sizeable predictions on transition neutrino magnetic moments and other electromagnetic parameters, such as neutrino milli-charges, are also addressed. The non-standard neutrino-nucleus processes, explored from nuclear physics perspectives within the context of quasi-particle random phase approximation, are exploited in order to estimate the expected number of events originating from vector …
Stabilise, balance and adjust : Framing the early years transitions of children whose parents work non‐standard hours
2022
This study examined talk by parents about the early years transitions of their children (n = 7) in the context of parental non-standard working hours and Finnish early childhood education and care (ECEC) services. Parents were interviewed at three time points: when their child was aged one, four, five or six years (a total of 21 interviews). The third interview was conducted during the COVID-19 pandemic. This article focuses on the children's ECEC transitions and the interpretative frames used by parents when talking about their work and childcare. The frames used by the parents to discuss the children's transitions were stabilising the children's lives, balancing between staying at home an…
Dark energy cosmologies for codimension-two branes
2005
A six-dimensional universe with two branes in the "football-shaped" geometry leads to an almost realistic cosmology. We describe a family of exact solutions with time dependent characteristic size of internal space. After a short inflationary period the late cosmology is either of quintessence type or turns to a radiation dominated Friedmann universe where the cosmological constant appears as a free integration constant of the solution. The radiation dominated universe with relativistic fermions is analyzed in detail, including its dimensional reduction.
On Prefix Normal Words
2011
We present a new class of binary words: the prefix normal words. They are defined by the property that for any given length $k$, no factor of length $k$ has more $a$'s than the prefix of the same length. These words arise in the context of indexing for jumbled pattern matching (a.k.a. permutation matching or Parikh vector matching), where the aim is to decide whether a string has a factor with a given multiplicity of characters, i.e., with a given Parikh vector. Using prefix normal words, we give the first non-trivial characterization of binary words having the same set of Parikh vectors of factors. We prove that the language of prefix normal words is not context-free and is strictly contai…
Cosmological radiation density with non-standard neutrino-electron interactions
2021
Neutrino non-standard interactions (NSI) with electrons are known to alter the picture of neutrino decoupling from the cosmic plasma. NSI modify both flavour oscillations through matter effects, and the annihilation and scattering between neutrinos and electrons and positrons in the thermal plasma. In view of the forthcoming cosmological observations, we perform a precision study of the impact of non-universal and flavour-changing NSI on the effective number of neutrinos, $N_{eff}$. We present the variation of $N_{eff}$ arising from the different NSI parameters and discuss the existing degeneracies among them, from cosmology alone and in relation to the current bounds from terrestrial exper…
Testing for a breakpoint in segmented regression: a pseudo score approach
2011
To overcome the well known oddities in testing for the existence of a breakpoint in segmented regression models, we discuss a novel approach based on the Pearson X2 statistic which can be understood as an approximation of the Score statistic. We describe the method and present results from some simulations.
Little Rip, ΛCDM and singular dark energy cosmology from Born–Infeld-f(R) gravity
2014
Abstract We study late-time cosmic accelerating dynamics from Born–Infeld- f ( R ) gravity in a simplified conformal approach. We find that a variety of cosmic effects such as Little Rip, ΛCDM universe and dark energy cosmology with finite-time future singularities may occur. Unlike the convenient Born–Infeld gravity where in the absence of matter only de Sitter expansion may emerge, apparently any FRW cosmology maybe reconstructed from this conformal version of the Born–Infeld- f ( R ) theory. Despite the fact that the explicit form of f ( R ) is fixed by the conformal ansatz, the relation between the two metrics in this approach may be changed so as to bring out any desired FRW cosmology.
Neutrino oscillations and Non-Standard Interactions
2017
Current neutrino experiments measure the neutrino mixing parameters with an unprecedented accuracy. The upcoming generation of experiments will be sensitive to subdominant effects that can give information on the unknown neutrino parameters: the Dirac CP-violating phase, the mass ordering and the $\theta_{23}$ octant. Determining the exact values of neutrino mass and mixing parameters is crucial to test neutrino models and flavor symmetries. In the first part of this review, we summarize the current status of neutrino oscillation parameters. We consider the most recent data from solar experiments and the atmospheric data from Super-Kamiokande, IceCube and ANTARES. We implement the data from…
Search for Neutrino Non-Standard Interactions with the KM3NET/ORCA 6 Lines Detector
2022
En el Modelo Estándar, que es la teoría establecida de las interacciones fundamentales, no se contempla que los neutrinos tengan masa. La mayoría de las extensiones teóricas postuladas del Modelo Estándar dirigidas a la inclusión de masas de neutrinos requieren la existencia de un nuevo tipo de interacciones que aún no se ha observado. Desde el punto de vista fenomenológico, estas interacciones se pueden agrupar bajo el concepto de interacciones no estándar de neutrinos (INE o NSIs por sus siglas en inglés) que afectarían la oscilación de neutrinos a un nivel secundario. El experimento KM3NeT/ORCA es un telescopio de neutrinos de próxima generación destinado a medir las oscilaciones de los …