Confidence and reliability measures in speaker verification

Speaker verification is a biometric identity verification technique whose performance can be severely degraded by the presence of noise. Using a coherent notation, we reformulate and review several methods which have been proposed to quantify the uncertainty in verification results, some with a view to coping with the effects of mismatched training-testing environments. We also include a recently proposed method, which is firmly rooted in a probabilistic approach and interpretation, and explicitly measures signal quality before assigning a reliability value to the speaker verification classifier's decision. We evaluate the performance of the confidence and reliability measures over a noisy 251-users database, showing that taking into account signal-domain quality can lead to better accuracy in prediction of classifier errors. We discuss possible strategies for using the measures in a speaker verification system, balancing acquisition duration and verification error rate.     

A Realistic Evaluation of Two Training Programs on Implementing Skin-to-Skin as a Standard of Care

The authors used realistic evaluation to examine the real-world effectiveness of two 5-day training techniques on sustained optimal skin-to-skin practices that support Step 4 of the revised Baby-Friendly Hospital Initiative (BFHI). The authors found that education alone was insufficient to effect sustainable practice change. Exposure to the 5-day immersion model (Practice, Reflection, Education and training, Combined with Ethnography for Sustainable Success, or PRECESS) alone or combined with education was an effective strategy to change and sustain the standard of care for skin-to-skin practice (p < 0.00001). The intended outcome of sustained practice change toward implementation of skin-to-skin care through immersion or a combined approach shows promise and should be repeated in other localities.     

Authenticity work in higher education learning environments: a double-edged sword?

Higher Education - Educational authenticity occupies a strong position in higher education research and reform, building on the assumption that correspondence between higher education learning...     

Developing Instructional Web Sites – A Software Engineering Approach

This paper focuses on the application of software engineering practices to the development of instructional web sites. The development of a web site, to support a distance or campus-based online course, is a very complex process that involves many instructional and technical aspects, including the instructional purpose of the course, its content, its structure, its interface, and its teaching–learning activities. The use of a method is essential for dealing with the complexity of this process. We describe, in this paper, a software engineering method that helps course designers and teachers to develop high quality instructional web sites. The design of the method was based on the integration of well-known principles, concepts and process models borrowed from instructional design, method engineering, and object-oriented software engineering. The method addresses the managerial processes required to plan, organize, and control the project, as well as the instructional and technical activities involved in the development of high quality course sites.     

The roots and routes of environmental and sustainability education policy research

Environmental Education Research has developed a Virtual Special Issue (VSI) (http://explore.tandfonline.com/content/ed/ceer-vsi) focusing on studies of environmental and sustainability education (ESE) policy. The VSI draws on key examples of research on this topic published in the Journal from the past two decades, for three reasons. First, to provide readers with a series of snapshots into the genealogy of ESE policy research in this field. Second, to encourage renewed attention to previously published work. And third, to offer commentary on the evolution of research trends, approaches and findings.     

Internationalisation in the Swedish nurse education from the perspective of teachers involved: An interview study

This paper presents results from an interview investigation with teachers in Swedish nurse education especially interested in internationalising the education. The aim has been to study teachers’ understandings and experiences of internationalisation against the backdrop of the strong concern for internationalisation expressed in policy documents. The results are seen in the context of globalisation, constraints to educational change, in a cultural perspective, and in relation to the need of a curriculum theory. The teachers united the global, in the form of personal experiences of other countries and cultures, with the national and local. Their experiences abroad were a basis for their interest in, and choice of content in, their teaching, considered to represent internationalisation of the education. The teachers were interpreting internationalisation in line with there understanding of nursing and the general approach to nursing in the education, without making any clear distinction concerning what specifically was internationalisation. The teachers seem to represent an important resource in internationalising the education. However, their understanding of and approach to internationalisation did not represent a shared culture and there was no shared curriculum including a distinct understanding of internationalisation. This is seen as a big challenge to both policy makers and teachers.     

The impact of student feedback on teaching in higher education

Receiving feedback from students has become a normal part of life for university teachers worldwide. This puts pressure on them from several sides and may be an influential factor that leads them to tailor their teaching to students’ preferences. The aim of this study was to investigate teachers’ perceptions of student feedback and how it affects their teaching choices. A survey was sent out to all teachers at the School of Business, Economics and Law at the University of Gothenburg, Sweden. The study found that student feedback is perceived positively by university teachers, has a large impact on their teaching and helps improve courses. Student feedback pushes teaching in the direction of fewer lectures and more tutorials, seminars and case studies. Teachers receiving negative student feedback experience more negative feelings related to the feedback, and are also more likely to introduce unjustified changes to their teaching in order to please students. These teachers also tend to have less teaching experience. However, a very large majority of teachers have a high level of professional pride and integrity and do not make (as they perceive them) unjustified changes to their teaching.     

I: The Effects of Background Variables on Transition to Higher Education

Abstract: Reuterberg, S.‐E. & Svensson, A. 1987. Student Financial Aid and Participation in Swedish Higher Education. I: The Effects of Background Variables pn Transition to Higher Education. Scandinavian Journal of Educational Research 31, 139‐150. The effects of social background, sex and achievement on transition rate to higher education are studied in three nationally representative samples of the Swedish population (born in 1948, 1953 and 1963, respectively). Social background and achievement are shown to have about the same effect on transition rate within the oldest cohort, while sex has relatively little effect. During the period of the study, achievement was seen to become progressively more important and therefore to exert greatest influence on the transition rate of the youngest cohort. Sex, too, becomes progressively more important but at the same time its effect changes. For the 1953 cohort, sex is reflected in a higher transition rate among men than among women, but for the youngest cohort the transition rate of women is higher than that of men. Part II of the study describes how these effects are influenced by student financial aid.     

Influence of different attentional focus on EMG amplitude and contraction duration during the bench press at different speeds

The purpose of this study was to investigate whether using different focus affects electromyographic (EMG) amplitude and contraction duration during bench press performed at explosive and controlled speeds. Eighteen young male individuals were familiarized with the procedure and performed the one-maximum repetition (1RM) test in the first session. In the second session, participants performed the bench press exercise at 50% of the 1RM with 3 different attentional focuses (regular focus on moving the load vs contracting the pectoralis vs contracting the triceps) at 2 speed conditions (controlled vs maximal speed). During the controlled speed condition, focusing on using either the pectoralis or the triceps muscles increased pectoralis normalized EMG (nEMG) by 6% (95% CI 3–8%; p = 0.0001) and 4% nEMG (95% CI 1–7%; p = 0.0096), respectively, compared with the regular focus condition. Triceps activity was increased by 4% nEMG (95% CI 0–7%; p = 0.0308) at the controlled speed condition during the triceps focus. During the explosive speed condition, the use of different focuses had no effect. The different attentional focus resulted in comparable contraction duration for the measured muscles when the exercise was performed explosively. Using internal focus to increase EMG amplitude seems to function only during conditions of controlled speed.     

Embodying Teaching: A Body Pedagogic Study of a Teacher’s Movement Rhythm in the ‘Sloyd’ Classroom

The article draws on body pedagogics and considers that teaching and learning experiences and outcomes are directly related to the different characteristics of movement behaviour. In this article movement behaviour specifically centres on a sloyd (handicraft education) teacher’s walk through the classroom. The analysis illuminate the specific teaching use of the body as a spatial, temporal and situational movement rhythm in the classroom and how teachers and pupils tune into educational discourses by means of different body techniques. A wireless GoPro camera was attached to the teacher’s chest in order to gain detailed view of pupil–teacher–body–material–tool encounters and a specific visual perspective of the sloyd teacher’s walk. During a 2.5 years fieldwork, 25 wood–metal sloyd lessons were observed and recorded (circa 50 h of video). The study is informed by Dewey’s embodied theory of learning and focus the alternation between active and passive phases in the stream of experience. From such Deweyan perspective the rhythm of an activity for organising experience, is fundamental to the creation of intelligent moving habits. The results show the body pedagogic experiences, outcomes and means by highlighting the teacher’s (a) spatial path by describing mutual relationships between the material arrangement of the classroom, the teacher’s bodily movements and the pupils’ participation in the lesson, (b) temporal pace by his ‘flights and perchings’ through the lessons and how he moves from pupil to pupil and assignment to assignment, (c) specific pacts by describing body techniques and situated teacher–pupil encounters that terminate in an agreement about how to proceed.