How Will We Understand What We Teach? - Primary Student Teachers’ Perceptions of their Development of Knowledge and Attitudes Towards Physics

The research outlined in this paper investigated how student teachers perceived the development of their knowledge and attitudes towards physics through video recorded practical workshops based on experiments and subsequent group discussions. During an 8-week physics course, 40 primary science student teachers worked in groups of 13–14 on practical experiments and problem-solving skills in physics. The student teachers were video recorded in order to follow their activities and discussions during the experiments. In connection with every workshop, the student teachers participated in a seminar conducted by their physics teachers and a primary science teacher; they watched the video recording in order to reflect on their activities and how they communicated their conceptions in their group. After the 8 weeks of coursework a questionnaire including a storyline was used to elicit the student teachers’ perceptions of their development of subject matter knowledge from the beginning to the end of the course. Finally, five participants were interviewed after the course. The results provided insight into how aspects such as self-confidence and the meaningfulness of knowledge for primary teaching were perceived as important factors for the primary science student teachers’ development of subject matter knowledge as well as a positive attitude towards physics.     

In an ICT‐based teacher‐education context: why was our group ‘the magic group’?

This article deals with a group of distance learning student teachers, who, after the course was completed, called themselves ‘The Magic Group’. The concept ‘magic’ refers to the reflective and productive learning process the group members experienced, a process far beyond their individual borders. The collaborative process was conducted by means of portfolio, peer learning through feedback and LMS (Learning Management System). The aim of the article is to focus on the most important assumptions for the group's successful learning process.

Cet article porte l'attention sur un groupe d'étudiants en formation d'enseignants en ligne qui, après les études, s'est appelé ‘Le groupe magique’. Le concept ‘magique’ se réfère à l'aspect réflexif et productif du processus d'apprentissage tel qu'il a été ressenti par les participants, ce processus ayant dépassé de loin leurs capacités individuelles d'apprentissage. Le processus collaboratif a été mené à l'aide de portfolio, de tutorat entre étudiants et d'une plate‐forme LMS (Learning Management System). L'objectif de l'article est de mettre en évidence les principaux facteurs qui auraient contribué à la réussite du processus d'apprentissage.

Éste artículo trata de un grupo de estudiantes que están estudiando métodos de enseñanza por la red y preparando para ser profesores. Después de había realizado sus estudios el grupo se llama ‘El grupo mágico’. La palabra ‘mágico’ hace referencia a la experiencia del grupo de un proceso de aprendizaje, productivo y reflexivo, un proceso que rebasó las posibilidades de cada estudiante individual. El proceso de colaboración se compuso de portafolios y de consejos y consultas de los compañeros estudiantes por medio de la red y de un programma de LMS (Learning Management System). Éste artículo tiene el propósito de enfocar a los aspectos más importantes para el aprendizaje muy bueno de ‘El grupo mágico’.

Dieser Artikel handelt vom Fernstudium einer Referendarengruppe, die sich nach Abschluss des Kurses als ‘The Magic Group’ bezeichnete. Der Ausdruck ‘magic’ bezieht sich auf den reflektierenden und produktiven Lernvorgang, den die Gruppe erlebte, und der die Grenzen von dem, was sie als Einzelne erreicht hätten, weit übertraf. Arbeitsweisen bei dieser Zusammenarbeit waren der Einsatz von Portfolio, Lernen durch Feedback von Mitstudierenden, sowie LMS (Learning Management System). Die Absicht des vorliegenden Artikels ist, die wichtigsten Voraussetzungen für den erfolgreichen Arbeitsprozess der Gruppe zu beleuchten.     

Community‐level Responses to Disability and Education in Rwanda

This article explores the meaning of community and perceptions of disability in Rwanda, as revealed through a community‐based ethnographic study. This study took place in Rwanda in an educational policy context driven by international rhetoric about human rights, inclusion and the arguably unachievable Education for All targets. We argue that the emphasis on the inclusion of marginalised groups in Rwanda’s current education policy is a reality on paper, but not in practice. However, we explore the potential for a deeper understanding of community responses to disability, and ways in which the rhetoric and reality gap can be bridged. We consider some of the attitudinal and infrastructural barriers in educational settings and argue that Rwandan communities are resourceful, and can be supported to respond appropriately to children with disabilities.     

Selective cell capture and analysis using shallow antibody-coated microchannels

Demand for analysis of rare cells such as circulating tumor cells in blood at the single molecule level has recently grown. For this purpose, several cell separation methods based on antibody-coated micropillars have been developed (e.g., Nagrath et al., Nature 450, 1235–1239 (2007)). However, it is difficult to ensure capture of targeted cells by these methods because capture depends on the probability of cell-micropillar collisions. We developed a new structure that actively exploits cellular flexibility for more efficient capture of a small number of cells in a target area. The depth of the sandwiching channel was slightly smaller than the diameter of the cells to ensure contact with the channel wall. For cell selection, we used anti-epithelial cell adhesion molecule antibodies, which specifically bind epithelial cells. First, we demonstrated cell capture with human promyelocytic leukemia (HL-60) cells, which are relatively homogeneous in size; in situ single molecule analysis was verified by our rolling circle amplification (RCA) method. Then, we used breast cancer cells (SK-BR-3) in blood, and demonstrated selective capture and cancer marker (HER2) detection by RCA. Cell capture by antibody-coated microchannels was greater than with negative control cells (RPMI-1788 lymphocytes) and non-coated microchannels. This system can be used to analyze small numbers of target cells in large quantities of mixed samples.     

South African Deaf education and the Deaf community

In a special section of the american Annals of the Deaf, Deaf education and the Deaf community in South Africa are discussed. The special section is organized into 7 segments: a historical overview to establish context, the educational context, educators and learners, postgraduate education and employment, perspectives of Deaf children and their parents, sport and the arts, and spiritual lives and mental health. Throughout the entire section, however, the central focus is on the overall foundation (or lack thereof) of education for Deaf learners in South Africa.     

Outcome‐Based Vocational Rehabilitation: Measuring Valuable Results

ABSTRACT This case study illustrates one of the many possible ways to implement Kaufman's Organizational Elements Model (1992, 2000) for identifying and aligning organizational results and the means to achieve them. The model was applied in the context of a needs assessment effort between the Florida State University's Office for Needs Assessment & Planning (ONAP) and the Vocational Rehabilitation Program at Florida Division of Blind Services (FDBS). Conducting this study and finding data that had such radical implications for decision‐making was life altering for many of the stakeholders, who up until that point were heavily focused on processes and resources, or at best, on Micro‐level results. Appropriate actions were taken to improve the performance system, but overall, one of the most significant contributions of this project was a new‐found focus on results, valuable results, and appropriate measures of success.     

A new method for recording the temporal pattern of stride during treadmill running

The aim of this study was to investigate the reliability of a new infrared light based method (IR₄₀) for recording temporal stride patterns during treadmill running. The IR₄₀ device, emitting a tight web of 40 infrared light beams 10 mm above the treadmill running surface, was compared to a previously validated electro-pneumatic contact shoe (CS) method while nine well-trained athletes ran at 2.8, 3.3, 3.9, 4.4, 5.0, and 5.6 m s⁻¹. Disconnection and reconnection of the IR beams marked the stance phase. The sampling rate was 500 Hz for both methods. The stance phase duration was on average 11.5 (±8.4) ms longer with the IR₄₀ than with the CS depending on earlier touch down (8.3 ± 6.2 ms) and delayed toe off (3.2 ± 5.3 ms) registrations. Significantly different stance phases were recorded between all velocities and for both methods. Thus, despite the fact that the IR₄₀ systematically measured a somewhat longer stance phase duration than CS, the IR₄₀ is nonetheless useful for temporal stride analysis during treadmill running.     

The stroke has only a minor influence on direction consistency in golf putting among elite players

In the golf instructional literature, the putting stroke is typically given higher priority than green reading and aiming. The main purpose of this study was to assess the importance of the putting stroke for direction consistency in golf putting. Kinematic stroke parameters were recorded from 71 elite golf players (mean handicap = 1.8, s = 4.2) on 1301 putts from about 4 m. Of the different factors deciding stroke direction consistency, face angle was found to be the most important (80%), followed by putter path (17%) and impact point (3%). This suggests that improvements in consistency of putter path and impact point will have very little effect on overall putting direction consistency and should not be prioritized in the training of elite players. In addition, mean stroke direction variability for an elite player (European Tour) was found to be 0.39 degrees, which is good enough to hole about 95% of all 4-m putts. In practice, however, top professionals in tournaments only hole about 17% of 4-m putts. We conclude that the putting stroke of elite golfers has a relatively minor influence on direction consistency.     

Knee angular displacement and extensor muscle activity in telemark skiing and in ski-specific strength exercises

Much of the training of competitive telemark skiers is performed as dry-land exercises. The specificity of these exercises is important for optimizing the training effect. Our aim here was to study the activation of the knee extensor musculature and knee angular displacement during competitive telemark skiing and during dry-land strength training exercises to determine the specificity of the latter. Specificity was analysed with respect to angular amplitude, angular velocity, muscle action and electromyographic (EMG) activity. Five male telemark skiers of national and international standard volunteered to participate in the study, which consisted of two parts: (1) skiing a telemark ski course and (2) specific dry-land strength training exercises for telemark skiing (telemark jumps and barbell squats). The angular displacement of the right knee joint was recorded with an electrogoniometer. A tape pressure sensor was used to measure pressure between the sole of the foot and the bottom of the right ski boot. Electromyographic activity in the right vastus lateralis was recorded with surface electrodes. The EMG activity recorded during maximum countermovement jumps was used to normalize the EMG activity during telemark skiing, telemark jumps and barbell squats. The results showed that knee angular displacement during telemark skiing and dry-land telemark jumps had four distinct phases: a flexion (F1) and extension (E1) phase during the thrust phase of the outside ski/leg in the turn/jump and a flexion (F2) and extension (E2) phase when the leg was on the inside of the turn/jump. The vastus lateralis muscle was activated during F1 and E1 in the thrust phase during telemark skiing and telemark jumps. The overall net knee angular amplitude was significantly greater (P < 0.05) for telemark jumps than for telemark skiing. Barbell squats showed a knee angular amplitude significantly greater than that in telemark skiing (P < 0.05). The mean knee angular velocity of the F1 and E1 phases during telemark skiing was about 0.47 rad x s(-1); during barbell squats, it was about 1.22 rad x s(-1). The angular velocity during telemark jumps was 2.34 and 1.59 rad x s(-1) in the F1 and E1 phase, respectively. The normalized activation level of the EMG bursts during telemark skiing, telemark jumps and barbell squats was 70-80%. In conclusion, the muscle action and level of activation in the vastus lateralis during the F1 and E1 phases were similar during telemark skiing and dry-land exercises. However, the dry-land exercises showed a larger knee extension and flexion amplitude and angular velocity compared with telemark skiing. It appears that an adjustment of knee angular velocity during barbell squats and an adjustment of knee angle amplitude during both telemark jumps and barbell squats will improve specificity during training.     

Work-time profile,blood lactate concentration and rating of perceived exertion in the 1998 Greco-Roman Wrestling World Championship

The aim of this study was to examine work-time profiles, blood lactate concentrations and perceived exertion among Greco-Roman wrestlers in the 1998 World Championship. Forty-two senior wrestlers from nine nations were studied in 94 matches. Each match was recorded with a video camera (Panasonic AG 455, film rate: 25 Hz) and analysed for duration of work (wrestling) and rest (interrupt) periods. Blood lactate concentration was determined with an electrochemical device (Analox P-LM5) and a rating of perceived exertion scale (Borg) was used to estimate general exertion and exertion in the extremity and trunk muscles. The mean duration of the matches was 427 s (range 324-535 s), with mean durations of work and rest of 317 and 110 s, respectively. The mean periods of work and rest were 37.2 and 13.8 s, respectively. Mean blood lactate concentration was 14.8 mmol x 1(-1) (range 6.9-20.6). The difference in mean blood lactate concentration between the first- and final-round matches was not significant (P > 0.05). Blood lactate concentration was significantly higher (P < 0.04) in matches of long duration than in those of short duration. The mean general rating of perceived exertion for all matches was 13.8 according to the scale used. Most of the wrestlers (53.3%) perceived exertion to be highest in the flexors of the forearm, followed by the deltoids (17.4%) and the biceps brachii muscles (12.0%). In addition to a relatively high rating of perceived exertion in the arm muscles, this indicates a high specific load on the flexor muscles of the forearm.