Search results for "menetelmä"

Optimistic NAUTILUS navigator for multiobjective optimization with costly function evaluations

2022

AbstractWe introduce novel concepts to solve multiobjective optimization problems involving (computationally) expensive function evaluations and propose a new interactive method called O-NAUTILUS. It combines ideas of trade-off free search and navigation (where a decision maker sees changes in objective function values in real time) and extends the NAUTILUS Navigator method to surrogate-assisted optimization. Importantly, it utilizes uncertainty quantification from surrogate models like Kriging or properties like Lipschitz continuity to approximate a so-called optimistic Pareto optimal set. This enables the decision maker to search in unexplored parts of the Pareto optimal set and requires …

‘Teachers see nothing’ : exploring students’ and teachers’ perspectives on school bullying with a new arts-based methodology

2020

Even though bullying is a perennial problem, there are still significant gaps in the research. The sensitive nature of the issue prompted us to develop and test a new arts-based method – a set of incomplete, problem-focused comic strips that were given to the participants for creative completion and were subsequently used as individualised interview prompts. The study took place in Russia with 14 teachers and 39 school children. The findings indicated that students and teachers agreed that instances of bullying should not be reported. However, there is a significant difference in how bullying is perceived by teachers and students. The majority of teachers indicated either seeing no bullying…

Critical educational praxis in university ecosystems: enablers and constraints

2018

Universities serve several important functions in society today through research, education, and community engagement, not least helping people to live meaningfully in society, and helping to create a world worth living in. A kind of practice that seems particularly important in fulfilling such responsibilities is critical educational praxis, a social-justice oriented, educational practice/praxis, with a focus on asking critical questions and creating conditions for positive change. Yet, the contemporary university is not exactly a niche for critical educational praxis. There are many practices and arrangements within higher education that make the enactment of critical educational praxis v…

The meanings of differentiated instruction in the narratives of Eritrean teachers

2021

The principles of inclusive education largely accepted by governments of different countries require differentiated classroom instruction to meet the diverse needs of individual students. Despite this, teachers have differing experiences and understandings about implementing differentiated instruction (DI) and heterogeneous classrooms. This narrative study aimed at exploring the meanings of DI in the Eritrean context, where teachers are not explicitly familiar with the concept, although their teaching practices reflect some level of differentiation. The research data consisted of 17 narrative interviews with Eritrean mathematics and science teachers. The results of the narrative analysis sh…

Editorial: Ethnological Knowledge

2019

This can be made more student-centred : Asynchronous mediation in in-service teacher professional development

2022

Vygotskian Sociocultural Theory is a powerful foundation for research into teacher professional development. However, while this research has been growing, it has largely been focused on pre-service second/foreign language. Furthermore, there is a lack of research on how the instructional process informed by the principles of Sociocultural Theory, including assessment of candidates’ mediated performance, can be orchestrated to promote teachers’ conceptual development and induce changes in their classroom practices. The present study explores how asynchronous assessment of in-service teachers’ portfolios (with the focus on lesson planning) informed by dynamic assessment framework shaped the …

The curl and fluting of paper : The effect of elasto-plasticity

2016

An in-plane elasto-plastic material model and a hygroexpansivity model were ap­plied for paper. The input parameters for both models are fiber orientation and dry solids content. A finite element model was constructed offering possibilities for studying different structural variations of an orthotropic sheet as well as buckling behavior and internal stress situations under through-thickness strain differences. Examples related to the curl and web­fluting phenomena of paper are presented. Both studied cases presented in this paper indicates the usefulness of the hygro-elasto-plastic model in predicting the challenging deformation phe­nomena of orthotropic paper sheets. The application possib…

An ecologist’s guide for studying DNA methylation variation in wild vertebrates

2022

The field of molecular biology is advancing fast with new powerful technologies, sequencing methods and analysis software being developed constantly. Commonly used tools originally developed for research on humans and model species are now regularly used in ecological and evolutionary research. There is also a growing interest in the causes and consequences of epigenetic variation in natural populations. Studying ecological epigenetics is currently challenging, especially for vertebrate systems, because of the required technical expertise, complications with analyses and interpretation, and limitations in acquiring sufficiently high sample sizes. Importantly, neglecting the limitations of t…

Towards a meta-method for the engineering of situational evaluation methods for domain-specific modeling tools

2015

Sovellusaluemallinnus (Domain-Specific Modeling, DSM) on eräs ohjelmistotuotannon lähestymistavoista, jossa sovelluskehityksen abstraktiotasoa nostetaan ohjelmoinnista sovellusaluekeskeiseen mallinnukseen. DSM mahdollistaa sovelluskehityksen automatisoinnin erityisesti kapeilla ja vakiintuneilla sovellusalueilla, joiden käsitteet, säännöt ja merkitykset soveltuvat DSM-kielten konstruktioiksi. DSM-välineet tarjoavat työkaluja DSM-kielten määrittelyyn ja käyttöön sekä sovellusmallien transformaatioihin. Teollisuudessa DSM-välineiden arviointeja tehdään tyypillisesti välinehankintojen valmistelun yhteydessä. Arviointeja suoritetaan myös tieteellisen tutkimuksen näkökulmasta. Arviointitulosten …

Body composition in 18 to 88-year-old adults - comparison of multifrequency bioimpedance and dual-energy X-ray absorptiometry

2014

Objective -- This study compared bioimpedance analysis (BIA) in the assessment of body composition with dual-energy X-ray absorptiometry (DXA) in 18- to 88-year-old adults. Design and Methods -- Body composition of 882 adults was estimated by eight-polar BIA and DXA. In addition, estimates of lean mass, fat mass, and percentage of fat were investigated across a range of age and leisure time physical activity (LTPA) groups. Results -- Compared to DXA, larger lean masses (mean difference 2.9 and 1.6 kg) and smaller fat masses (3.1 and 2.6 kg) were estimated by BIA in both women and men, respectively. Differences between the methods' mean values were evident in all age and LTPA groups, except …