Search results for " comparison"
showing 10 items of 583 documents
An extension of the Burrows-Wheeler Transform and applications to sequence comparison and data compression
2005
We introduce a generalization of the Burrows-Wheeler Transform (BWT) that can be applied to a multiset of words. The extended transformation, denoted by E, is reversible, but, differently from BWT, it is also surjective. The E transformation allows to give a definition of distance between two sequences, that we apply here to the problem of the whole mitochondrial genome phylogeny. Moreover we give some consideration about compressing a set of words by using the E transformation as preprocessing.
An extension of the Burrows-Wheeler Transform
2007
AbstractWe describe and highlight a generalization of the Burrows–Wheeler Transform (bwt) to a multiset of words. The extended transformation, denoted by ebwt, is reversible. Moreover, it allows to define a bijection between the words over a finite alphabet A and the finite multisets of conjugacy classes of primitive words in A∗. Besides its mathematical interest, the extended transform can be useful for applications in the context of string processing. In the last part of this paper we illustrate one such application, providing a similarity measure between sequences based on ebwt.
Fixed point theorems for non-self mappings in symmetric spaces under φ-weak contractive conditions and an application to functional equations in dyna…
2014
In this paper, we prove some common fixed point theorems for two pairs of non-self weakly compatible mappings enjoying common limit range property, besides satisfying a generalized phi-weak contractive condition in symmetric spaces. We furnish some illustrative examples to highlight the realized improvements in our results over the corresponding relevant results of the existing literature. We extend our main result to four finite families of mappings in symmetric spaces using the notion of pairwise commuting mappings. Finally, we utilize our results to discuss the existence and uniqueness of solutions of certain system of functional equations arising in dynamic programming.
A weak comparison principle for solutions of very degenerate elliptic equations
2012
We prove a comparison principle for weak solutions of elliptic quasilinear equations in divergence form whose ellipticity constants degenerate at every point where \(\nabla u\in K\), where \(K\subset \mathbb{R }^N\) is a Borel set containing the origin.
Compound conditionals, Fr\'echet-Hoeffding bounds, and Frank t-norms
2021
Abstract In this paper we consider compound conditionals, Frechet-Hoeffding bounds and the probabilistic interpretation of Frank t-norms. By studying the solvability of suitable linear systems, we show under logical independence the sharpness of the Frechet-Hoeffding bounds for the prevision of conjunctions and disjunctions of n conditional events. In addition, we illustrate some details in the case of three conditional events. We study the set of all coherent prevision assessments on a family containing n conditional events and their conjunction, by verifying that it is convex. We discuss the case where the prevision of conjunctions is assessed by Lukasiewicz t-norms and we give explicit s…
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…
CONSTRUCTING, BOOTSTRAPPING, AND COMPARING MORPHOMETRIC AND PHYLOGENETIC TREES: A CASE STUDY OF NEW WORLD MONKEYS (PLATYRRHINI, PRIMATES)
2005
Morphometric data sets are often phenetically analyzed by using various kinds of spatial, metric, or nonmetric multivariate analyses. Such methods produce results that are difficult to compare directly with molecular or morphological phylogenetic hypotheses, which are usually expressed by using nonspatial tree representations. Therefore, it is useful in a comparative approach to analyze, and above all to visualize, morphometric pairwise relationships as tree structures. For this purpose, several additive or ultrametric methods exist, which often return different topologies for the same data set. Objective criteria are thus needed to identify the tree-building algorithm (or algorithm family)…
Pathways fostering mobility to higher education for vulnerable immigrants in France, Switzerland and Canada
2016
In this article we wish to clarify not only if, but also how – through which institutional settings – higher education is accessed by students from vulnerable immigrant groups in France, Switzerland and Canada. We are interested in the possible educational mobility that immigrant youths can experience arising from country-specific educational policies designed to increase the enrolment in higher education, particularly the flow from upper-secondary vocational educational tracks to higher education ones. We analyse using panel data in each country the accessibility of different pathways to higher education while taking into account the characteristics of the students. In terms of educational…
Diversification of old-age care services for older people: Trade-offs between coverage, diversification and targeting in European countries.
2011
Information on public services for older people is often limited to institutional care and Home Help/ Home Care, be it for individuals in surveys, statistics for a specific country or for international comparisons. Yet, these two major services in many countries are supplemented — or substituted — by other, minor services. The latter include services such as transportation services, meals-on-wheels, alarm systems, and day care. In this study the authors use various data sources to provide information on all or most of these types of support for Denmark, Norway, Sweden, Germany, England, Spain, and Israel, concluding with a closer scrutiny of Swedish service profiles. When all types of suppo…
Inequalities in educational opportunities in France: educational expansion, democratization or shifting barriers?
2000
International audience; This paper is concerned with inequalities in educational opportunities in France and presents data collected from cohorts born between 1919 and 1973, a period characterized by educational expansion. Data from large-scale representative French surveys were compiled in such a way as to make accurate historical and international comparisons possible. The paper argues that there has been a shift in social inequalities, from entry into collège (lower secondary school) to entry into lycée (upper secondary school leading to the baccalauréat). Finally, policy implications have been drawn from international comparisons of data on the reduction of social inequality. Cet articl…