An environmental ethical conceptual framework for research on sustainability and environmental education     

David O. Kronlid  Johan Öhman 《Environmental Education Research》2013,19(1):21-44

This article suggests that environmental ethics can have great relevance for environmental ethical content analyses in environmental education and education for sustainable development research. It is based on a critique that existing educational research does not reflect the variety of environmental ethical theories. Accordingly, we suggest an alternative and more nuanced environmental ethical conceptual framework divided into Value-oriented Environmental Ethics and Relation-oriented Environmental Ethics and present two pragmatic schedules for analyses of the value and relation contents of e.g. classroom conversations, textbooks and policy documents. This framework draws on a comparative reading of some 30 key books and 20 key articles in academic journals in the field of environmental philosophy and reflects main traits in environmental ethics from the early 1970s to the present day.  相似文献   

Participatory approach in practice: an analysis of student discussions about climate change     

Johan Öhman  Marie Öhman 《Environmental Education Research》2013,19(3):324-341

Many authors have claimed that participatory perspectives should be a significant feature of environmental and sustainability education (ESE). This change in ESE practice implies a relocation of the process of environmental knowledge constitution from ‘before’ to ‘in’ the educational event. The aim of this paper is to clarify both the processes of knowledge constitution and the content of the constituted knowledge within participatory ESE practices. Two methods based on John Dewey’s transactional perspective are used in the study: epistemological move analysis and pragmatic discourse analysis. The empirical material consists of video-recorded student discussions about climate change in the setting of a Swedish upper secondary school with a pronounced sustainability approach. In the analyses, six different epistemological moves used by the students are identified. The analyses show how students cooperatively constitute a specific view of climate change by using these moves. A main conclusion of this study is that participatory approaches do not necessarily mean that knowledge becomes more diverse. It is therefore important that teachers pay attention to governing processes among students and occasionally challenge the common view in order to allow for alternative possibilities and views.  相似文献   

A longitudinal study of multidimensional performance characteristics related to physical capacities in youth handball     

Stijn P.J. Matthys  Roel Vaeyens  Job Fransen  Dieter Deprez  Johan Pion  Joric Vandendriessche 《Journal of sports sciences》2013,31(3):325-334

Abstract

Longitudinal research provides valuable information about change and progress towards elite performance. Unfortunately, there is a lack of longitudinal research in handball. In this study, 94 youth handball players (oldest group: n = 41; age 15–17 and youngest group: n = 53; age 13–15) were followed over a three-year period. Repeated Measures ANCOVA was conducted to reveal longitudinal changes in anthropometry and physical performance between elite and non-elite players, controlling for maturation. Maturation effects were found for anthropometry (P < 0.01) and some physical performance measures in strength and speed (P < 0.05). The lack of significant interaction effects revealed that during the three years of the study the elite players did not improve their physical performance more rapidly than the non-elites. Furthermore, they had a similar anthropometric profile to the non-elites. Elite players performed better on the Yo-Yo Intermittent Recovery test (P < 0.01; on average 24.0 in the youngest group and 25.2% in the oldest group over the three years) and on the speed and coordination items (P < 0.05; shuttle run: 3.6 and 5.1%; cross hopping: 11.0 and 14.8%, handball-specific shuttle run: 7.6 and 7.7%; slalom dribble test: 10.7 and 8.9%; sprint 30 m: 4.9 and 3.9%). Additionally, Yo-Yo performance and coordination with and without a ball were the most discriminating factors between the playing levels. In conclusion, youth coaches and scouts within team handball should recognise the importance of good skills and an excellent endurance for talent identification purposes.  相似文献   

Educational technology on a turning point: curriculum implementation in Flanders and challenges for schools   总被引：1，自引：0，他引：1  

Ruben Vanderlinde  Johan van Braak  Ruben Hermans 《Educational technology research and development : ETR & D》2009,57(4):573-584

In this essay, we state that establishing technology curricula by national governments causes a shift in the policy actions of educational technology support: from a technical rationale with a main focus on funding and resources to a pedagogical rationale with a main focus on student competencies. We illustrate our point of view by describing the formal educational technology curriculum recently administered by the government in Flanders. This curriculum is written in terms of attainment targets and has clear implications on the nature of educational technology which is no longer dependent on teachers’ individual efforts or willingness, but is becoming compulsory at the school level. Furthermore, we present two levers that facilitate the integration process of educational technology in general and the realization of technology curricula in particular. Technology coordinators should act more as curriculum managers and change agents, and schools should jointly establish a technology policy plan.

Ruben VanderlindeEmail:

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‘Improving little by little,every day’: the road to Operational Excellence     

Johan VAN CAMPEN  Eveline HERTZBERGER 《Learned Publishing》2009,22(2):102-106

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A method to integrate patterned electrospun fibers with microfluidic systems to generate complex microenvironments for cell culture applications     

Patric Wallin  Carl Zandén  Bj?rn Carlberg  Nina Hellstr?m Erkenstam  Johan Liu  Julie Gold 《Biomicrofluidics》2012,6(2)

The properties of a cell’s microenvironment are one of the main driving forces in cellular fate processes and phenotype expression invivo. The ability to create controlled cell microenvironments invitro becomes increasingly important for studying or controlling phenotype expression in tissue engineering and drug discovery applications. This includes the capability to modify material surface properties within well-defined liquid environments in cell culture systems. One successful approach to mimic extra cellular matrix is with porous electrospun polymer fiber scaffolds, while microfluidic networks have been shown to efficiently generate spatially and temporally defined liquid microenvironments. Here, a method to integrate electrospun fibers with microfluidic networks was developed in order to form complex cell microenvironments with the capability to vary relevant parameters. Spatially defined regions of electrospun fibers of both aligned and random orientation were patterned on glass substrates that were irreversibly bonded to microfluidic networks produced in poly-dimethyl-siloxane. Concentration gradients obtained in the fiber containing channels were characterized experimentally and compared with values obtained by computational fluid dynamic simulations. Velocity and shear stress profiles, as well as vortex formation, were calculated to evaluate the influence of fiber pads on fluidic properties. The suitability of the system to support cell attachment and growth was demonstrated with a fibroblast cell line. The potential of the platform was further verified by a functional investigation of neural stem cell alignment in response to orientation of electrospun fibers versus a microfluidic generated chemoattractant gradient of stromal cell-derived factor 1 alpha. The described method is a competitive strategy to create complex microenvironments invitro that allow detailed studies on the interplay of topography, substrate surface properties, and soluble microenvironment on cellular fate processes.  相似文献   

Acoustophoretic microfluidic chip for sequential elution of surface bound molecules from beads or cells     

Per Augustsson  Johan Malm  Simon Ekstr?m 《Biomicrofluidics》2012,6(3)

An acoustophoresis-based microfluidic flow-chip is presented as a novel platform to facilitate analysis of proteins and peptides loosely bound to the surface of beads or cells. The chip allows for direct removal of the background surrounding the beads or cells, followed by sequential treatment and collection of a sequence of up to five different buffer conditions. During this treatment, the beads/cells are retained in a single flow by acoustic radiation force. Eluted peptides are collected from the outlets and subsequently purified by miniaturized solid-phase extraction and analyzed with matrix assisted laser desorption mass spectrometry. Fundamental parameters such as the system fluidics and dispersion are presented. The device was successfully applied for wash and sequential elution of peptides bound to the surface of microbeads and human spermatozoa, respectively.  相似文献   

Differences in physical fitness and gross motor coordination in boys aged 6-12 years specializing in one versus sampling more than one sport     

Fransen J  Pion J  Vandendriessche J  Vandorpe B  Vaeyens R  Lenoir M  Philippaerts RM 《Journal of sports sciences》2012,30(4):379-386

The Developmental Model of Sports Participation proposes two pathways towards expertise in sports between 6 and 12 years of age: early specialization and early diversification. This study investigated the effect of sampling various sports and of spending many or few hours in sports on fitness and gross motor coordination. Altogether, 735 boys in three age groups (6-8, 8-10, and 10-12 years) were profiled using a fitness test battery. A computerized physical activity questionnaire was used to obtain data on sports participation. In the eldest group, (M)ANCOVA showed a positive effect of sampling various sports on strength, speed, endurance, and gross motor coordination (P < 0.05). A positive effect of many hours per week spent in sports was apparent in every age group. These data suggest an acute positive effect of many hours in sports and a latent positive effect of early sampling on fitness and gross motor coordination. Multiple comparisons revealed that boys aged 10-12 years, who spent many hours in various sports, performed better on standing broad jump (P < 0.05) and gross motor coordination (P < 0.05) than boys specializing in a single sport. Therefore, our results highlight the importance of spending many hours in sports and sampling various sports in the development of fitness and gross motor coordination.  相似文献   

Development of the self-regulated learning teacher belief scale     

Koen Lombaerts  Free De Backer  Nadine Engels  Johan van Braak  James Athanasou 《European Journal of Psychology of Education - EJPE》2009,24(1):79-96

The present study describes the development and psychometric properties of the Self-Regulated Learning Teacher Belief Scale (SRLTB). The SRLTB is a self-report teacher scale with 10 items assessing teachers' beliefs about introducing self-regulated learning (SRL) in primary education. The process of item and scale development as well as testing and scale refinement procedure is presented. An explorative study (n=399) revealed a one-factor structure representing adherence of teachers for SRL in primary school. Next, Rasch analysis revealed good fit of the scale to the unidimensional continuum model. In a following study (n=553), construct validity of the SRLTB was confirmed. Finally, implications and limitations of the SRLTB for studying SRL are discussed. In general, the SRLTB appears to be a useful instrument for examining teacher beliefs about self-regulated learning practices in primary schools.  相似文献   

The economic microgeography of diversity and specialization externalities – firm-level evidence from Swedish cities     

Martin Andersson  Johan P Larsson  Joakim Wernberg 《Research Policy》2019,48(6):1385-1398

We employ finely geo-coded firm-level panel data to assess the long-standing question whether agglomeration economies derive from specialization (within-industry), diversity (between-industry) or overall density. Rather than treating the city as a single unit, we focus our analysis on how the inner industry structures of cities influence firm-level productivity. Our results illustrate the co-existence of several externalities that differ in their spatial distribution and attenuation within cities. First, we find robust positive effects of neighborhood-level specialization on TFP as well as a small effect of diversity at the same fine spatial level. These effects are highly localized and dissipate beyond the immediate within-city neighborhood level. Second, we also find that firms benefit from the overall density of the wider city. The results emphasize the relevance of “opening up” cities to study the workings of their inner organization and support the idea that location in a within-city industry cluster in a diversified and dense city boosts productivity.  相似文献