Search results for "LONG"

On the effectiveness of different additives and concentrations on the re-building of the molecular structure of degraded polyethylene

2006

Mechanical recycling is an easy and economic way to re-use plastic waste as secondary materials, but, in general, their properties are worse with respect to the reclaimed materials and the virgin polymer. The aim of this work was to study the effect of concentration and reaction kinetics of two additives, an ethylene-co-glycidyl methacrylate (Lotader) and a hydroxylamine derivative (CGX), in the re-building of a degraded polyethylene. CGX is a nitroxyl radical generator able to form branching in polyolefins while the epoxy groups of Lotader can react with the functional groups present in the recycled polyethylene. The results indicate that the CGX has a higher reaction rate than Lotader, pr…

Rheological Properties of Different Film Blowing Polyethylene Samples Under Shear and Elongational Flow

2005

Summary: The rheological behavior of polyethylenes ismainly dominated by the molecular weight, the molecularweight distribution and by the type, the amount and thedistribution of the chain branches. In this work a linearmetallocenecatalyzedpolyethylene(m-PE),abranchedme-tallocene catalyzed polyethylene (m-bPE), a conventionallinear low density polyethylene (LLDPE) and a low densitypolyethylene (LDPE) have been investigated in order tocompare their rheological behavior in shear and in elonga-tional flow. The four samples have similar melt flow indexand in particular a value typical of film blowing grade.The melt viscosity has been studied both in shear and inisothermal and non-isothermal elonga…

PROCESSING AND CHARACTERIZATION OF THE POLYMER/CNTs NANCOMPOSITE FIBRES.

2009

How Much Should we Care about Consecutive Spells of Poverty? Proposal of a New Index

2009

Is cross-sectional poverty a reflection of real economic and social disadvantage? Does total number of years spent in poverty provide sufficient information about poverty severity? Recent studies show that in some countries there are good reasons to believe that it is not (see, among others, Mendola et al., 2009). Traditional measures of poverty persistence, such as ‘poverty rate’ (i.e. the number of years spent in poverty upon total number of observations) or the ‘persistent-risk-ofpoverty rate’, do not devote enough attention to the sequence of poverty spells. In particular they are not good enough in underlining different effects associated to occasional single spells of poverty and cons…

Homère dans le Traité du Sublime

2018

International audience

"Figure 2" of "Measurement of long-range angular correlation and quadrupole anisotropy of pions and (anti)protons in central $d+$Au collisions at $\s…

2023

$c_2$ ($p_T$) for track lower-tower pairs from 0-5% $d$+Au collisions and $c_2$ ($p_T$) for pairs in minimum bias $p$+$p$ collisions times the dilution factor.

"Figure 4b" of "Measurement of long-range angular correlation and quadrupole anisotropy of pions and (anti)protons in central $d+$Au collisions at $\…

2023

Measured $v_2$ ($p_T$) for identified pions, each charged combined, 0-5% central $d$+Au collisions at RHIC.

"Figure 3" of "Measurement of long-range angular correlation and quadrupole anisotropy of pions and (anti)protons in central $d+$Au collisions at $\s…

2023

Measured $v_2$ for midrapidity charged tracks in 0-5% central $d$+Au at $\sqrt{s_{NN}}$ = 200 GeV using the event plane method.

Resolving reading disability : Childhood predictors and adult-age outcomes

2019

We examined frequency of adult‐age reading disability (RD) and its childhood predictors among 48 adults (20 to 39 years) with documented childhood RD, and contrasted their cognitive skills, education, and employment with 37 matched controls. Among individuals with childhood RD, more than half had improved in their reading fluency to the level where the set criterion for adult‐age RD was not met anymore. More fluent rapid naming, less severe childhood RD, and multiple support providers in childhood together predicted improvement of reading fluency. More fluent naming differentiated the childhood RD participants whose reading fluency had improved by adult‐age from those participants whose RD …

Examining pre-service teachers' Technological Pedagogical Content Knowledge as evolving knowledge domains : A longitudinal approach

2019

The aim of this study is to outline the development and changes in pre‐service teachers' technological pedagogical content knowledge (TPACK) assessments during the first 3 years in teacher education. Specifically, research was conducted at three measurement points over a 3‐year teacher education period. The target group consisted of pre‐service teachers (N = 148) from three Finnish universities. Results indicate a growth in confidence related to all TPACK areas during the research period. The strongest gains were in pedagogical content knowledge. In addition, the gains were larger in other areas related to pedagogical knowledge than areas related to technology or content knowledge. In areas…