Search results for "Statistica"

Механика композитных материалов, 2022, Т. 58, No 1, Январь-февраль

2022

An Inverse Problem for the Relativistic Boltzmann Equation

2020

We consider an inverse problem for the Boltzmann equation on a globally hyperbolic Lorentzian spacetime $(M,g)$ with an unknown metric $g$. We consider measurements done in a neighbourhood $V\subset M$ of a timelike path $\mu$ that connects a point $x^-$ to a point $x^+$. The measurements are modelled by a source-to-solution map, which maps a source supported in $V$ to the restriction of the solution to the Boltzmann equation to the set $V$. We show that the source-to-solution map uniquely determines the Lorentzian spacetime, up to an isometry, in the set $I^+(x^-)\cap I^-(x^+)\subset M$. The set $I^+(x^-)\cap I^-(x^+)$ is the intersection of the future of the point $x^-$ and the past of th…

Triacylglycerol Analysis in Human Milk and Other Mammalian Species: Small-Scale Sample Preparation, Characterization, and Statistical Classification …

2015

In this work, a method for the separation of triacylglycerols (TAGs) present in human milk and from other mammalian species by reversed-phase high-performance liquid chromatography using a core–shell particle packed column with UV and evaporative light-scattering detectors is described. Under optimal conditions, a mobile phase containing acetonitrile/n-pentanol at 10 °C gave an excellent resolution among more than 50 TAG peaks. A small-scale method for fat extraction in these milks (particularly of interest for human milk samples) using minimal amounts of sample and reagents was also developed. The proposed extraction protocol and the traditional method were compared, giving similar results…

Efficacy of the laser at low intensity on primary burning oral syndrome: a systematic review.

2020

Background Primary burning mouth syndrome (BMS) is a chronic clinical condition of idiopathic mainly characterized by pain and a burning sensation in the oral cavity. The application of laser at low intensity therapy is a treatment option. This systematic review evaluated the efficacy of laser therapy in treating symptoms of burning mouth syndrome. Material and Methods The study was formulated according to the PRISMA and Cochrane guidelines. Seven databases were used as primary sources of research. Only randomized controlled clinical trials were included. The efficacy of the therapy was estimated comparing the values of the visual and numerical scales of pain before and after laser treatmen…

MATERIAL DEPRIVATION AMONG FOREIGNERS IN ITALY

2014

In all European countries, migrant populations tend to have worse living conditions than native; this is particularly true for those born outside the EU. This paper proposes a new way to look at the relative living conditions of foreigners by looking at non-monetary (or ‘direct’) indicators of material deprivation in Italy-a country characterized by the presence of a wide range of nationalities. To examine differences in economic integration of foreigners, the paper documents deprivation differentials across groups of foreigners. In particular, we measure differences in material deprivation between groups of foreigners once we control for the demographic and socioeconomic characteristics of…

Estimation of linear errors-in-variable models with error free covariates: a backfitting approach

2008

We present a backfitting algorithm to estimate linear regression mod- els having both error-prone and error-free covariates as predictors. The algorithm assumes that the variance-ratios are known, and it is particulary efficient when several explanatory variables are included. The resulting estimators are shown to be unbiased and to perform well as compared to method-of-moments estimators which are usually employed when the variance ratio is known.

Relación entre características de resiliencia, estrés parental y satisfacción con la vida en familias con hijos con TDAH

2016

Abstract.This paper addresses two aims: a) to analyze differences in the stress of parents of children and adolescents with ADHD with high and low scores on success atributes related to resilience; b) to study the relationship between these success attributes and the level of success of life satisfaction of children in different domains. For this, 46 families completed the questionnaires of Assessment Attributes Success, the domain’s Father Parenting Stress Index and Life Satisfaction Scales. The statistical analysis demonstrated significant differences in the parenting stress of children with ADHD and low and high scores on the attributes of self-awareness, proactivity, perseverance and go…

The role of part-time special education supporting students with reading and spelling difficulties from grade 1 to grade 2 in Finland

2017

AbstractPrevious studies show that many students with reading and spelling problems have a lack of progress in reading and spelling skills after years of special education services. The aim of the study is to evaluate the reading and spelling skills of Finnish children in grades 1 and 2 receiving part-time special education from special education teachers for reading and spelling difficulties (RSD) and for RSD with other learning difficulties. In this study, the focus is in the roles of the form and the amount of part-time special education in reading and spelling skills development. Of 152 children involved in the study, 98 received part-time special education for RSD, and 54 did not have …

Nordic City Regions in the Creative Class Debate—Putting the Creative Class Thesis to a Test

2010

The Nordic countries have a quite different urban structure and social systems than the USA. Denmark, Finland, Norway and Sweden may then constitute a critical test of the empirical reach of Richard Florida's much cited creative class thesis beyond its empirical basis in the USA. This paper employs comparative statistics to examine the importance of the quality of place in attracting members of the creative class to Nordic city regions, and it analyses the role of the creative class for regional economic development. Florida's original study focused only on city regions with more than 100,000 inhabitants. Our statistical analyses mainly support Florida's results with regard to these larger …

Levels of cognitive congruence between managers and team members’ perceptions of cooperation at work

2019

Much of the research on the psychological dynamics of performance teams suffers from the following limitations: consideration of only one theoretical framework and analysis of just one perspective (e.g., manager&ndash