Multilevel Training of Binary Morphological Operators

The design of binary morphological operators that are translation-invariant and locally defined by a finite neighborhood window corresponds to the problem of designing Boolean functions. As in any supervised classification problem, morphological operators designed from a training sample also suffer from overfitting. Large neighborhood tends to lead to performance degradation of the designed operator. This work proposes a multilevel design approach to deal with the issue of designing large neighborhood-based operators. The main idea is inspired by stacked generalization (a multilevel classifier design approach) and consists of, at each training level, combining the outcomes of the previous level operators. The final operator is a multilevel operator that ultimately depends on a larger neighborhood than of the individual operators that have been combined. Experimental results show that two-level operators obtained by combining operators designed on subwindows of a large window consistently outperform the single-level operators designed on the full window. They also show that iterating two-level operators is an effective multilevel approach to obtain better results.

Prospective teachers’ conceptions of what characterize a gifted student in mathematics

This paper explores Swedish prospective teachers’ conceptions of what characterise a gifted student in mathematics. This was studied through a qualitative questionnaire focusing on attributions. The results show that a majority of the students attribute intrinsic motivation to gifted students, more often than extrinsic motivation. Other themes were other affective factors (e.g. being industrious), cognitive factors (e.g. easy to learn), and social factors such as good behaviour and background.

An Empirical Study on Teachers’ Choice of Extensive Literature in the Swedish Upper Secondary EFL Classroom

The importance of extensive literature reading in the English as a Foreign Language (EFL) context has been given increasing attention in recent research. Literature reading is also a required part of the national syllabi of the (EFL) courses offered to both adolescents and adults at Upper Secondary level in Sweden. This thesis aims to investigate the teachers’ process of making literature choices for extensive reading in upper secondary EFL courses in Sweden. Eight teachers of three different student groups took part in the study, representing adolescent university preparatory programs and vocational programs, as well as programs for adult students. Questionnaires were used and the data was analyzed for patterns revealing three main factors affecting teachers’ literature choice: language proficiency, reading experience and contextual factors. These three factors were fitted into the theoretical framework of psycholinguistic and sociolinguistic reading models, with the addition of a perspective of motivational research. The results of this survey underline the importance of extensive reading, according to teachers, and that motivation for literature choice can be primarily related to factors associated with psycholinguistic reading models. The survey also points to the need for further investigating of teachers’ own experiences of literature reading, searching for deeper motivational factors which influence teaching choices. Another future field of research is the choice of reading activities assigned together with the chosen literature, which probably also influence teachers’ choices in the Swedish EFL classroom.

L1 Use in the EFL-classroom : A Literature Review on Teachers’ Use of the L1 in the EFL-classroom on Upper Secondary Level

Even though English should mainly be used in the EFL-classroom according to the Swedish national curriculum, some recent scholars have argued that a judicious use of the students’ L1 by the teachers in some particular situations may benefit the learning environment there. From this context, this thesis examines what research says about in what particular situations the L1 is used by teachers in upper secondary EFL-classrooms as well as the teachers’ and the students’ attitudes towards this practice. The method used was a systematic literature review, where seven articles from all across the globe were analyzed, compared and synthesized. The results show that the L1 was mainly used by the teachers when managing discipline, when explaining grammar and when teaching vocabulary. However, the articles did not conclude how the L1 could be used strategically by the teachers. Concerning the teachers’ and students’ attitudes, the majority of these were positive towards L1 use by the teacher in the above mentioned situations. However, the teachers were not aware of how the L1 could be used by them in a judicious and a strategic way. Lastly, it can be concluded that more research is needed on how the L1 can be used more strategically by the teachers as well as on the students’ perspective on this.

Motor unit synchronization measured by cross-correlation is not influenced by short-term strength training of a hand muscle

The purpose of the study was to quantify the strength of motor unit synchronization and coherence from pairs of concurrently active motor units before and after short-term (4–8 weeks) strength training of the left first dorsal interosseous (FDI) muscle. Five subjects (age 24.8 ± 4.3 years) performed a training protocol three times/week that consisted of six sets of ten maximal isometric index finger abductions, whereas three subjects (age 27.3 ± 6.7 years) acted as controls. Motor unit activity was recorded from pairs of intramuscular electrodes in the FDI muscle with two separate motor unit recording sessions obtained before and after strength training (trained group) or after 4 weeks of normal daily activities that did not involve training (control group). The training intervention resulted in a 54% (45.2 ± 8.3 to 69.5 ± 13.8 N, P = 0.001) increase in maximal index finger abduction force, whereas there was no change in strength in the control group. A total of 163 motor unit pairs (198 single motor units) were examined in both subject groups, with 52 motor unit pairs obtained from 10 recording sessions before training and 51 motor unit pairs from 10 recording sessions after training. Using the cross-correlation procedure, there was no change in the strength of motor unit synchronization following strength training (common input strength index; 0.71 ± 0.41 to 0.67 ± 0.43 pulses/s). Furthermore, motor unit coherence z scores at low (0–10 Hz; 3.9 ± 0.3 before to 4.4 ± 0.4 after) or high (10–30 Hz; 1.7 ± 0.1 before to 1.9 ± 0.1 after) frequencies were not influenced by strength training. These motor unit data indicate that increases in strength following several weeks of training a hand muscle are not accompanied by changes in motor unit synchronization or coherence, suggesting that these features of correlated motor unit activity are not important in the expression of muscle strength.

Becoming l(IT)erate : pre-service English teachers and ICTs

One of the recommended principles for classroom practice from the Digital Rhetorics Project is ‘Teachers First’, emphasising the need to prioritise the requirements of teachers in learning new technologies and in understanding their relationship to literacy education (Lankshear, Green and Snyder 2000, p. 121). While most of my pre-service English Education students use digital technologies for their own purposes and understand the benefits of doing so, it is not always straightforward regarding how technology can be effectively utilised in their classroom and for what purposes. This article reports work conducted with pre-service English Education teachers in an elective unit that focuses upon digital technologies in secondary classrooms. Using Green’s 3D model of literacy as a way of understanding the complex interrelationships between the cultural, critical and operational aspects of literacy, the students experiment with digital technologies such as mobile phones, wikis and blogs.

Australian and US preservice teachers' perceptions of the gender stereotyping of mathematics

Historically mathematics was considered a pursuit more suited to males than females. Using a new instrument, contemporary high school students' beliefs about the gender stereotyping of mathematics have been measured and an apparent change in beliefs reported. The same instrument was administered to preservice teachers in Australia and the USA. These countries share common social and cultural characteristics and both were active in addressing identified female disadvantage in mathematics education outcomes. The preservice teachers were asked to respond to the survey items as they believed high school students would answer. The Australian and US preservice teachers' responses were compared. The results are reported and discussed in this paper.

The role of supervision in the training of a psychoanalyst

This paper discusses the role of clinical supervision in psychoanalytic training. It also discusses the impact of training modes on the psychoanalytic organisations that use these different models of training. The paper argues that psychoanalytic training consists of a unique combination of personal analysis, study of psychoanalytic theory and research and clinical supervision. Given the variation of these three components and their possible interactions, an overly prescriptive view of training can be detrimental and counterproductive. The effectiveness of psychoanalytic supervision is to a significant degree dependent upon a trainee being engaged in personal analysis. Clinical competency requires extensive clinical experience obtained in a variety of settings and with a broad exposure to patient groups. The detrimental implications of restrictive and reductive views on psychoanalytic training that seek to specify quantitative criteria rather than clearly articulate clinical competencies are discussed.

Handbook of teacher education : globalization, standards and professionalism in times of change

This book provides an international review of the current state of teacher education, with chapters from an international group of teacher educators. It focuses on major issues that are confronting teacher educators now and in the next decade. These include the impact of globalization on the profession of teaching, and how teacher education must deal with changing accountability requirements from governments and establish a set of minimum standards acceptable to enable a person to teach. The work also considers aspects of the three major phases of teacher education: the period prior to commencing in the profession, successful induction into the profession, and the ongoing professional development of teachers. Finally, it identifies ways in which new technologies can be used to improve the training and ongoing development of teachers. Cases from different countries are used to provide a rich base of data to help us understand how the profession is moving onwards.

Reflective practice in teacher education : learning from case studies of environmental education

This book is focused on ten action research and evaluative case studies in environmental education carried out by teacher educators and teachers. The case studies range across five European countries: Austria, Hungary, Italy, Sweden and Switzerland. They are followed by cross-case comparisons which explore issues emerging from the documented reflective practice: aims of environmental education in the educational policy context of the countries, their relationship to the disciplines and the traditional knowledge transmission position, the role of action research approaches for innovation and reflection, and institutional conditions of collaboration in teacher education. This international case study project is research based in adopting professional development approaches that are informed by action research principles. It represents examples of innovation that challenge established practice in schools and teacher education institutions. It provides study material for all who attempt to describe, change and improve their own education practices and who want to adopt an action research approach to professional or program development.

Reflections of teacher education students learning of rhythm: Orff to an African beat

This article reports on students' reflections, gathered from questionnaire and interview data, on their learning of rhythm and on their attitudes and  motivation from having engaged with African music as non-music specialists using the Orff approach. The "traditional" Orff approach to classroom music was supplemented with African repertoire which builds on the nexus, identified by Amoaku (1 982), between the Orff method and the traditional way of music learning in African cultures. This article describes my experience as a South African working with Australian non-specialist primary teacher students of predominantly Anglo-Celtic background within the context of a music education unit at Deakin University's Melbourne (Burwood) Campus. As Nketia (1988) points out, I - like many expatriate music educators - have selected music from my own country of origin as the foundation to develop curriculum materials teaching rhythm through non-Western music. The results demonstrate worthwhile experiences and outcomes for both the students and myself.