Search results for " Context"
showing 10 items of 461 documents
Nondeterministic operations on finite relational structures
1998
Abstract This article builds on a tutorial introduction to universal algebra for language theory (Courcelle, Theoret. Comput. Sci. 163 (1996) 1–54) and extends it in two directions. First, nondeterministic operations are considered, i.e., operations which give a set of results instead of a single one. Most of their properties concerning recognizability and equational definability carry over from the ordinary case with minor modifications. Second, inductive sets of evaluations are studied in greater detail. It seems that they are handled most naturally in the framework presented here. We consider the analogues of top-down and bottom-up tree transducers. Again, most of their closure propertie…
On block pumpable languages
2016
Ehrenfeucht, Parikh and Rozenberg gave an interesting characterisation of the regular languages called the block pumping property. When requiring this property only with respect to members of the language but not with respect to nonmembers, one gets the notion of block pumpable languages. It is shown that these block pumpable are a more general concept than regular languages and that they are an interesting notion of their own: they are closed under intersection, union and homomorphism by transducers; they admit multiple pumping; they have either polynomial or exponential growth.
Quantum Pushdown Automata
2000
Quantum finite automata, as well as quantum pushdown automata were first introduced by C. Moore, J. P. Crutchfield [13]. In this paper we introduce the notion of quantum pushdown automata (QPA) in a non-equivalent way, including unitarity criteria, by using the definition of quantum finite automata of [11]. It is established that the unitarity criteria of QPA are not equivalent to the corresponding unitarity criteria of quantum Turing machines [4]. We show that QPA can recognize every regular language. Finally we present some simple languages recognized by QPA, two of them are not recognizable by deterministic pushdown automata and one seems to be not recognizable by probabilistic pushdown …
Quantum Finite Multitape Automata
1999
Quantum finite automata were introduced by C. Moore, J. P. Crutchfield [4], and by A. Kondacs and J. Watrous [3]. This notion is not a generalization of the deterministic finite automata. Moreover, in [3] it was proved that not all regular languages can be recognized by quantum finite automata. A. Ambainis and R. Freivalds [1] proved that for some languages quantum finite automata may be exponentially more concise rather than both deterministic and probabilistic finite automata. In this paper we introduce the notion of quantum finite multitape automata and prove that there is a language recognized by a quantum finite automaton but not by deterministic or probabilistic finite automata. This …
Revista electrónica de investigación y evaluación educativa
2014
Resumen tomado de la publicación Título, resumen y palabras clave en inglés y español Se muestra el proceso seguido para diseñar e identificar las propiedades psicométricas del instrumento de evaluación del constructo Atención a la Diversidad como variable de contexto. Para ello, se ha comenzado con una pequeña revisión de los instrumentos utilizados para recoger información sobre la diversidad tanto cultural como social, lingüística o en capacidades. A continuación y, partiendo de una clasificación de los distintos enfoques teóricos, se ha construido un primer instrumento, apostando por un enfoque inclusivo. Posteriormente se procede a una validación por expertos. Tras la validación se tom…
Entre la diversité institutionnelle et la dynamique locale, les effets contextuels ...
1993
actes des journées scientifiques sur le changement en éducation, Paris, Université René Descartes-Paris 5, 11-13 janvier 1990] / [organisées par l'Unité de recherche associée au CNRS Sociologie de l'éducation]; International audience
Behavioural profile of drug users attending public drug-treatment centres in Sicily: the role of social context
2007
<p><strong>Objective</strong>: Investigations of injecting drug users (IDUs) have suggested that the social context may influence high-risk behaviours in this population. The aim of this study was to describe knowledge, attitudes and behaviours of IDUs attending public drug-treatment centres in our area.</p><p><strong>Study design and methods</strong>: A cross-sectional survey was conducted between July 2002 and February 2004, enrolling 607 drug users attending four public drug-treatment centres in the Palermo area. Two of them were located inside the urban area, whereas the other two were in rural districts near the city. All participants answered …
From the Museum to the site and backwards
2021
Digital archaeological reconstructions usually at documenting the original position of blocks and architectural elements of the building, both the ones on site and those exhibited in museums. Digital survey and representation provide the opportunity to place the fragments into the reconstruction model of the building, thus making the understanding of their shape and function much easier. A relevant difference between past and present reconstructions is the representation of the context and the landscape. The context is a relevant feature of watercolor ‘Restorations’ of the Grand Tour; on the other hand, in digital reconstructions the landscape is often neglected or reduced to a ‘background’…
Parental working time patterns and children's socioemotional wellbeing: Comparing working parents in Finland, the United Kingdom, and the Netherlands
2017
Abstract This cross-national study examined the connections between parental working time patterns (i.e., regular day work vs. nonstandard working hours) and children's socio-emotional wellbeing defined in terms of internalizing and externalizing problems and prosocial behavior. We also examined how the total number of hours worked, changes in work schedules, working overtime at short notice, and having an influence over one's work schedules were linked with children's wellbeing. Data were collected by a web survey from Finnish ( n = 358), Dutch ( n = 200) and British ( n = 267) parents with children aged 3 to 12 years. The results showed, that in all three countries parents working nons…
Cultural Identity and Using Music in the Intercultural Educational Process
2014
Abstract Working with music in early childhood education stimulates a child's brain, motor skills and communicative abilities, in addition to their socio-affective relationships. Through songs, a child can start learning about and practicing his or her culture of origin. At this point, the teacher should be aware of pluriculturalism in the classroom and promote awareness of cultural identity as an approach to developing interculturalism. Nursery rhymes, because of their compositional characteristics, are the perfect tool to develop intercultural values and ensure that children not only understand their own culture but also recognise their cultural characteristics in other cultures. A series…