Search results for "well"
showing 10 items of 2241 documents
Revisiting the happy-productive worker thesis from a eudaimonic perspective: a systematic review
2021
The happy-productive worker thesis (HPWT) is considered the Holy Grail of management research, and it proposes caeteris paribus, happy workers show higher performance than their unhappy counterparts. However, eudaimonic well-being in the relationship between happiness and performance has been understudied. This paper provides a systematized review of empirical evidence in order to make a theoretical contribution to the happy-productive worker thesis from a eudaimonic perspective. Our review covers 105 quantitative studies and 188 relationships between eudaimonic well-being and performance. Results reveal that analyzing the eudaimonic facet of well-being provides general support for the HPWT…
Longitudinal associations of student–teacher relationships and behavioural and emotional strengths on academic achievement
2017
Positive student–teacher relationships are related to students’ academic achievement and behavioural and emotional adjustment. How a student’s behavioural and emotional strengths are associated with these relationships and how the relationships influence students’ academic performance remains unknown. We examined this framework using a cross-lagged panel model with a group of Finnish students and their parents from Grade 5 to Grade 7. The results revealed that the parents rated behavioural and emotional strengths are stable over a 1-year (r = .78) and 2-year (r = .71) period and that students’ perceptions of student–teacher relationships demonstrated greater change over time (r’s = .54, .35…
Interlamellar Reactions of Tetracalcium Aluminate Hydrates with Water and Organic Compounds
1967
Tetracalcium aluminate hydrates are the first example of layer-structured crystals containing neutral sheets, which are highly capable of interlamellar adsorption of water and neutral organic compounds. In this respect tetracalcium aluminate hydrates present new aspects of the phenomenon of swelling, and bring about the challenge of comparison with the frequently examined clay-organic compounds. This report is concerned with the probable monolayer structure of tetracalcium aluminate hydrate which forms five hydration stages. A summary concerning configuration and properties of adsorption complexes with approximately 500 selected organic substances follows. As far as these substances are hom…
Predicting mass fluxes in the pervaporation process using Maxwell-Stefan diffusion coefficients
2018
Abstract In the past decades, it has been proven that pervaporation is an effective and energy-efficient membrane process for the separation of liquids that are difficult to separate in classical processes. The demand for new process applications has increased the need for mass transfer simulation methods, considering the interactions between the system components and the influence of process parameters on the permeation fluxes and at the same time requiring as few experiments as possible. The aim of the study was to find out whether the calculation of mass fluxes of multicomponent fluids based on the system of generalized Maxwell-Stefan equations (GMSE), using Maxwell-Stefan (M-S) diffusio…
Growth of ZnO crystals by vapour transport: Some ways to act on physical properties
2006
Nowadays, the growth of ZnO by vapor transport in silica ampoules is generally made in presence of graphite. As it has been already shown, this means that the growth process is carried out in presence of a Zn excess. In order to control that and act, as a consequence, on the physical properties of crystals we have performed a systematic study of the growth process in a wide range of Zn excess compositions using well defined experimental conditions. As a preliminary characterization, optical absorption and electrical properties have been analyzed at room temperature. The results show how some physical properties of as-grown ZnO crystals can be changed in a controlled way by an adequate combi…
Various types of polysiloxanes studied by positron annihilation lifetime spectroscopy
2014
Abstract In the work, linear poly(vinylsiloxanes) with regular distributions of vinyl groups along chains, the networks obtained by their hydrosilylation with various hydrogensiloxanes, products of pyrolysis of such networks as well as the networks prepared via reaction of low-molecular siloxanes have been studied by positron anihilation lifetime spectroscopy (PALS). Based on free volume sizes determined by this method, relations between cross-link densities in the investigated systems have been established. They have been compared with the results of swelling experiments conducted in the work and to efficiency of cross-linking reaction evaluated in our previous FTIR investigations of the s…
Intense laser effects on donor impurity in a cylindrical single and vertically coupled quantum dots under combined effects of hydrostatic pressure an…
2010
WOS: 000280235800010
Influence of layer structure preservation on the catalytic properties of the pillared zeolite MCM-36
2010
MCM-36 is a catalytically active material made by swelling and subsequent pillaring of a layered zeolite precursor, MCM-22(P). However, the swelling procedures lead to significant destruction of layer structure and alteration of framework silicon/aluminum (Si/Al) ratio, which are likely to influence the acidity and catalytic activity of the final materials. We report a milder swelling and pillaring process to prevent such structural destruction. The resulting pillared materials show higher crystallinity and improved retention of the zeolitic layer structure when compared to the ones prepared by the previously reported methods involving more aggressive treatments. Implications of such struct…
Einfluß der quellung in aceton auf das kernresonanzspektrum von polyäthylenterephthalat
1971
Die Kernresonanzspektren isotherm kristallisierter Proben von Polyathylenterephthalat wurden vor und nach der Quellung in deuteriertem Aceton als Funktion der Temperatur gemessen. Anschliesend wurde jedes Spektrum in eine breite und eine schmale Komponente zerlegt. Es zeigt sich, das durch die Quellung der Einfrierbereich verbreitert und die Einfriertemperatur erniedrigt wird. Diese Erniedrigung ist von den Kristallisationsbedingungen unabhangig. Die Linienbreite der schmalen Komponente wird durch die Quellung leicht erhoht, was fur eine Zunahme der Kettenverspannung in den nichtkristallinen Bereichen spricht. Das zweite Moment der breiten Komponente wird durch die Quellung erniedrigt. Dara…
Unaccompanied minors in Sicily: promoting conceptualizations of child well-being through children’s own subjective realities
2020
Understanding unaccompanied minors’ (UAMs’) individual migration journeys and aspirations and hopes helps make sense of the meaning they ascribe to their personal and social reality in their quest for integration and mobility. Although the well-being of children is considered to be of the utmost importance in contemporary times, we still lack good evidence of what children themselves regard as key facets of this, from their own life experiences. Identifying different domains and dimensions of children’s well-being and touching upon its multifaceted nature, this study presents an alternative framework, showing how the quality of the reception path is fundamental to having successful results …