Prediction of vibrations induced by trains on line 8 of Beijing metro

This paper mainly discusses the problem of ground-borne vibrations due to the planned line 8 of Beijing metro which passes under the National Measurement Laboratory. A lot of vibration sensitive equipments are placed in the laboratory. It is therefore necessary to study the impact of vibrations induced by metro trains on sensitive equipments and important to propound a feasible vibration mitigation measure. Based or1 the coupled periodic finite element-boundary element （FE-BE） method, a 3D dynamic track-tunnel-soil interaction model for metro line 8 has been used to predict vibrations in the free field induced by trains running at variable speeds between 30 km/h and 80 km/h. Four types of track structures commonly used on the Beijing metro network have been considered： （1） high resilience direct fixation fasteners, （2） Vanguard fasteners, （3） a floating slab track and （4） a floating ladder track. For each of these track types, the vibration isolation efficiency has been compared. The results of the numerical study can be used to predict vibrations in nearby buildings and to decide upon effective vibration countermeasures.     

Pediatric cochlear implantation: a qualitative study of parental decision-making processes in Flanders, Belgium

Factors contributing to parents' decision when they choose between cochlear implantation (CI) and traditional hearing aids for their child were examined. The subjects were children with severe/profound hearing loss, born 1999-2001, registered in the universal neonatal hearing screening program in the Flanders region of Belgium. Qualitative data collected retrospectively from parents were subjected to thematic content analysis. In their responses to professional advice, parents were segmented into 3 groups: (a) those whose primary considerations were the importance of oral language development and the relative potential of CI and traditional hearing aids; (b) those for whom alternative factors (e.g., medical risks, ethical issues) were paramount, even in the face of professional advocacy of CI; (c) those who followed professional advice against CI. The researchers conclude that care professionals should be sensitive to the impact of their advice and other factors in parental decision making.     

How distributed leadership can make a difference in teachers' organizational commitment? A qualitative study

The present study explores the relation between distributed leadership and teachers' organizational commitment. Semi-structured interviews with teachers and school leaders of secondary schools were conducted. A comparative analysis of four schools with high and four schools with low committed teachers was carried out. Findings revealed differences in the leadership practices which influenced organizational commitment. The leadership practices include the quality and distribution of leadership functions, social interaction, cooperation of the leadership team, and participative decision-making. Teachers reported being more strongly committed to the school if the leaders were highly accessible, tackled problems efficiently or empowered teachers to participate, and frequently monitored teachers' daily practices.     

The Limits of Educational Policy and Practice? The case of ethnic minorities in The Netherlands

This article describes the situation in the field of ethnic minorities and education in The Netherlands and other Western countries. The policy that has been and is being pursued in The Netherlands is central to this article, as well as the way in which this policy has been translated into practice. The most important aim of the policy is to combat educational disadvantages among minorities. Attention is paid to the evaluation of the various aspects related to the education offered to minorities. These evaluations show that even though a great deal has been brought about, policies have up until now hardly succeeded in improving the relative position of the minorities. On the basis of these findings, a number of changes have recently come about in the policy, that are likely to have far-reaching consequences for educational practice. To conclude this article attention is paid to this new policy.     

Measuring Public Opinions About Surveys

Respondent's opinions about survey research are regarded asan expression at the individual level of the general survey-takingclimate. Based on a review of the research about ‘surveyson surveys’ five relevant dimensions of the respondent'sopinion about surveys are distinguished: survey enjoyment, surveyvalue, survey cost, survey reliability, and survey privacy.Items related to these aspects are used to develop an ‘Opinionsabout Survey Scale’. The results of an analysis of thepredictive validity of the scale support the expectations basedon the theory of planned behavior. Opinions about surveys areassociated with the intention to participate in future surveysand with hesitation to fill out the questionnaire of a mailsurvey. Opinions are not related with participation in a follow-upmail survey. The results of the wave analysis of a mail surveyare a clear indication that nonrespondents have more negativeopinions about different aspects of surveys. This also meansthat the measurement of opinions is biased. However, becauseof this bias it is worthwhile and useful to measure these opinions.     

Teacher education and the choice to enter the teaching profession: A prospective study

This two-wave survey study aimed at testing a hypothetical model of teacher education graduates’ decisions about whether or not to take a teaching position upon graduation. The model focuses on the relationship between teacher education and graduates’ choice on job entrance. Using path analysis and logistic regression, this model was tested in a sample of student teachers (n = 436), subsequently graduates (n = 251) of teacher training for secondary education. The results validate the relationship between teacher education variables and nearly graduates’ intention to enter the teaching profession. Furthermore, this intention proves an imperative predictor of graduates’ actual entrance.     

Getting the story, understanding the lives: From career stories to teachers' professional development

To understand teachers' professional development, the career stories of 10 experienced Flemish (Belgian) Primary School teachers were collected. The analysis of these narrative data culminated in the reconstruction of a professional self and a subjective educational theory, both conceived of as indicators for the professional development. These general concepts were differentiated to develop a conceptual framework for understanding teachers' professional development from their career stories. The comparative analysis of the stories revealed two important recurring themes, the strive for job stability and the feelings of vulnerability for the teacher. In this paper the “biographical perspective” is depicted as a general theoretical approach, and as a concrete research procedure for data collection and analysis. The author concludes that a narrative-biographical approach constitutes a viable perspective for understanding professional development from the subjective viewpoint of the teachers.     

Ethnicity,Forms of Capital,and Educational Achievement

Bourdieu's cultural capital thesis is an attempt to explain how social class influences the transmission of educational inequality. In this article, the question of the extent to which various forms of capital also apply to ethnic minorities stands central. On the basis of Dutch and American research findings, a model is formulated and empirically tested with the aid of data from the Dutch Primary Education cohort study. Students from four ethnic groups are included: Dutch, Surinamese, Turkish, and Moroccan. The main variables are language and math test scores, socio-economic milieu, and a number of capital indicators, including financial resources, linguistic resources, parental reading behavior, and educational resources within the family. The results show no mediating effect of resources within the various ethnic groups. The findings also suggest that in research and practice it is relevant to not treat ethnic groups as one homogenous group, but to differentiate between the various groups.     

Teacher-Student Interaction Patterns Change During an Early Science Teaching Intervention

Research in Science Education - This study aimed to explore the interaction between teachers and young students in terms of their question and answer patterns during science lessons and to...     

Inclusive Education for Students with Hearing Impairment in the Regular Secondary Schools in the North-West Region of Cameroon: Initiatives and Challenges

Although some initiatives are implemented in the education of students with hearing impairments in the regular school, challenges are still encountered in their education. This article which is part of the results from an ongoing qualitative study in the North-West region of Cameroon addresses the different initiatives and challenges involved with including students with hearing impairment in regular schools. Interviews, participant observations as well as field notes were the main instruments used in collecting data from the six teachers and six students with hearing impairments who participated in the research. Academic support, classroom placement and the way of working of the sign language interpreters were considered the major initiatives and challenges in the education of the students with hearing impairment in regular schools. It is apparent that adequate adjustments have not been made within the schools to meet the needs of the students with hearing impairments. This hence questions their actual inclusion in the regular school.