Search results for "PET"

The Elephant in the Machine: Proposing a New Metric of Data Reliability and its Application to a Medical Case to Assess Classification Reliability

2020

In this paper, we present and discuss a novel reliability metric to quantify the extent a ground truth, generated in multi-rater settings, as a reliable basis for the training and validation of machine learning predictive models. To define this metric, three dimensions are taken into account: agreement (that is, how much a group of raters mutually agree on a single case)

Individualizing deep dynamic models for psychological resilience data

2020

ABSTRACTDeep learning approaches can uncover complex patterns in data. In particular, variational autoencoders (VAEs) achieve this by a non-linear mapping of data into a low-dimensional latent space. Motivated by an application to psychological resilience in the Mainz Resilience Project (MARP), which features intermittent longitudinal measurements of stressors and mental health, we propose an approach for individualized, dynamic modeling in this latent space. Specifically, we utilize ordinary differential equations (ODEs) and develop a novel technique for obtaining person-specific ODE parameters even in settings with a rather small number of individuals and observations, incomplete data, an…

Accuracy and the role of experience in dynamic computer guided dental implant surgery: an in-vitro study

2019

Background To compare the accuracy of implant placement using the conventional freehand method and a dynamic navigation system; to assess the role of the surgeon’s experience in implant placement using these two methods. Material and Methods A randomized in-vitrostudy was conducted. Six resin mandible models and 36 implants were used. Two researchers with differing clinical experience (novice and experienced) placed implants using either the Navident dynamic navigation system (navigation group) or the conventional freehand method (freehand group). Accuracy was measured by overlaying the real position in the postoperative CBCT on the virtual presurgical placement of the implant in a CBCT ima…

[68Ga]Ga-DATA5m.SA.FAPi PET/CT: Specific Tracer-uptake in Focal Nodular Hyperplasia and potential Role in Liver Tumor Imaging.

2020

Towards new challenges in Finnish pre-service teacher training

2015

Teacher training in Finland is facing a situation in which it is necessary to develop new ways to organize education according to the needs of the students and society. There is an increasing demand for a more flexible teacher study program that would make it possible for students to face the future challenges in more versatile ways. This qualitative study investigates pre-service teachers’ professional development during the 6 ECTS credits learning period in multiple authentic 21st Century learning environments in Primary school teacher training. This article provides an opportunity to discuss and develop primary school teacher training to help pre-service teachers to adapt themselves to f…

A Brief History of the Peer-Group Mentoring Model in Finland: Struggling for Space in a Contested Niche

2020

The aim of this article is to introduce and reflect on the development of mentoring in Finland as implemented in the form of the Peer-Group Mentoring (PGM) model. Firstly, the main characteristics and principles of the PGM model are introduced, after which experiences from implementing the model are analysed based on a literature review. We examine the following research questions: (1) How have the mentoring practices of newly qualified teachers developed towards the PGM model within the educational ecosystem in Finland? (2) How has the PGM model found its relational space (‘ecological niche’) in this ecosystem? and (3) How has PGM been experienced by mentors and mentees in terms of profess…

Teaching networking: an interpersonal communication competence perspective

2015

Modern working life calls for competences that enable people to be creative, innovative and effective. Studies looking at contemporary enterprises and organisations such as businesses and schools have shown that many of the qualifications that graduating students would need, including informal learning (see Gielen, Hoeve & Nieuwenhuis 2003), innovativeness (e.g. Moolenaar & Sleegers 2010; Obstfeld 2005) and creativity (e.g. Burt 2004; Perry-Smith & Shalley 2003), are associated with interpersonal relationships and social networks. According to a report on the national career survey (EK 2011a), effective networking is dependent on social skills such as the ability to establish contacts in mu…

Transitions in Individual Vocational Education Pathways: Challenges and Collaborative Solutions

2012

This chapter draws upon some of the main results of two Finnish nationwide case studies on how common efforts of education providers and organizations’ personnel support VET (vocational education and training) students along their individual learning paths. The first study concerns best practices to prevent early leaving, and the second was a Finnish national pilot programme to assist uncertain students who have somewhat weak prerequisites to enter vocational education. Some excellent solutions are presented, but special challenges for the learner, organization and staff are also revealed. The solutions for excellence promote practices, strategies and structures that support students’ trans…

Tensions of student voice in higher education : Involving students in degree programme curricula design

2020

This paper considers the direct involvement of students in degree programme curricula design, specifically four computer science teacher students designing new curricula for the Faculty of Information Technology of the University of Jyväskylä. They participated in a project to make recommendations for the 2017–2020 master’s and bachelor’s programme curricula. We examined how these recommendations were implemented in the new curricula and what hindered student voice. The project led to major changes: making basic studies in mathematics optional, adding three new courses, and defining new learning goal descriptions for two master’s programmes. Several factors hindered student voice: insuffici…

Informal learning contexts in the construction of physical education student teachers’ professional identity

2022

This study aimed to investigate the significance of informal learning contexts in physical education (PE) student teachers’ professional identity construction. It addressed two research questions: How do informal learning contexts contribute to the construction of PE student teachers’ professional identity? What forms of relationships can be identified between the informal and formal contexts of learning in PE student teachers’ professional identity construction? The data consisted of 20 semi-structured interviews with PE student teachers during the final teaching practice period. The data were analysed using structural and pattern coding methods. The analysis revealed that informal learnin…