Search results for "Theory"

Oikealle alalle? : logistiikka-alan ammattikoulutuksen ja työelämän osaamisen todellisuuksien kohtaaminen

2016

The aim of this doctoral thesis was to study how vocational education and training (VET) and working life encounter each other. Naturally the research topic chosen was selected from the researcher´s own professional field, i.e., logistics education. The research task was to examine, how VET-students' professional expectations in the study field of logistics encounter with the working life realities. The main research question was “How do the logistics (driver training) students’ vocational expectations encounter with the requirements of dynamically changing working life from the point of view of the vocational competence, the time span of 2001-2025?” The two sub-questions were 1) How do the…

Vocational teachers' professional agency in the stream of change

2013

Experimental Validation of Maximum Constant Boost Control and Switching Frequency Optimal for three-phase Quasi-Z-Source Converters

2020

This paper presents a modified modulation scheme for quasi-Z-Source converters, based on the Maximum Constant Boost Control (MCBC) concept and Switching Frequency Optimal (SFO) as reference signal. The effectiveness of the proposed technique is validated by comparing the obtained results (in terms of AC harmonic content and voltage stress) with those carried out from traditional modulation schemes. For this reason, a test bench has been assembled and the benefits of the SFO MCBC modulation scheme have been valuated.

Decoupled control scheme of grid-connected split-source inverters

2017

Grid-connected power conversion systems for renewable energy sources must fulfill several requirements, e.g., the high efficiency, the reduced cost and complexity, and, quite often, the boost capabilities that is usually achieved using a front-end dc–dc boost converter before the inversion stage, leading to a two-stage architecture. Meanwhile, single-stage power conversion systems, which perform the boosting operation within the inversion one, offer some potential advantages, in terms of reducing the complexity and the volume of the whole system. Among several proposed options, the split-source inverter (SSI) has been recently proposed by Abdelhakim et al. as an alternative option with some…

Relationship between volume and energy of vector fields

2001

Abstract A unified study of energy and volume functionals is presented here by determining the critical points of a functional that extends simultaneously energy and volume and that is defined on the product of the manifold of smooth maps C∞(M,N) times the manifold M of riemannian metrics on M. The restriction of this functional to different submanifolds of the space of vector fields X (M)× M is also considered, and used to study several functionals generalizing volume and energy or total bending of vector fields

The marketplace vulnerability of low-income unbanked consumers : a developing country perspective

2018

Financial exclusion is recognised as an important element of socio-economic inequality where economically vulnerable groups are excluded from basic financial services. The issue of financial exclusion is mainly concentrated in the world’s developing countries. However, research on the issue of financial exclusion in the field of marketing as well as from the perspective of unbanked consumers is lacking. Although financial exclusion impedes low-income consumers’ welfare, there is a shortage of wellbeing related studies on low-income consumers in the context of developing countries. This doctoral dissertation aims to investigate the ways in which low-income unbanked consumers experience vulne…

The impact of children’s socioemotional development on parenting styles: the moderating effect of social withdrawal

2020

This study focused on associations between children’s socioemotional development (prosocial behaviour, internalizing and externalizing problems) and parenting styles (affection, behavioural control, and psychological control), and the moderating role of children’s social withdrawal (as a temperamental characteristic) in these associations. Children’s socioemotional development (n = 314) were rated by teachers at three-time points (grades 1–3). Parents completed questionnaires measuring their parenting styles at the same three-time points. The level of social withdrawal was obtained at the end of kindergarten from teachers’ reports. Panel analysis showed that prosocial behaviour was associat…

Reconceptualising teacherhood through the lens of foreign-language mediation

2013

Examining Consumers’ Usage Intention of Contactless Payment Systems

2019

Purpose The purpose of this paper is to develop and test a conceptual model that combines the modified Unified Theory of Acceptance and Use of Technology (UTAUT2) with a consumer brand engagement (CBE) model to predict consumers’ usage intentions toward contactless payment systems in a developed country. Design/methodology/approach The authors cooperated with a contactless payment service provider in Finland and reached out to 22,000 customers, resulting in 1,165 usable responses. The collected data were analyzed using structural equation modeling. Findings The study shows that the UTAUT2 and the CBE model together explain approximately 70 percent of the variance in usage intention. Of the…

On the convergence of zero-point vibrational corrections to nuclear shieldings and shielding anisotropies towards the complete basis set limit in wat…

2016

The method and basis set dependence of zero-point vibrational corrections (ZPVCs) to nuclear magnetic resonance shielding constants and anisotropies has been investigated using water as a test system. A systematic comparison has been made using the Hartree–Fock, second-order Møller–Plesset perturbation theory (MP2), coupled cluster singles and doubles (CCSD), coupled cluster singles and doubles with perturbative triples corrections (CCSD(T)) and Kohn–Sham density functional theory with the B3LYP exchange-correlation functional methods in combination with the second-order vibrational perturbation theory (VPT2) approach for the vibrational corrections. As basis sets, the correlation consisten…