Slowmation: Preservice elementary teachers representing science knowledge through creating multimodal digital animations     

Garry Hoban  John Loughran  Wendy Nielsen 《科学教学研究杂志》2011,48(9):985-1009

Research has identified the value of learners using technology to construct their own representations of science concepts. In this study, we investigate how learners, such as preservice elementary teachers, design and make a narrated animation to represent their science knowledge. The type of animation exemplified is called a “Slowmation” (abbreviated from “Slow Animation”), which is a simplified way for preservice teachers to make an animation that integrates features from claymation, object animation, and digital storytelling. Drawing on semiotic theory, a case study of three preservice elementary teachers, who were audio and video recorded as they created a slowmation, illustrates how the construction process enabled them to engage with a science concept in multiple ways. Findings suggest that when preservice teachers create a slowmation, they design and make a sequence of five representations, each being a semiotic system with particular affordances that link as a semiotic progression: (i) research notes; (ii) storyboard; (iii) models; and (iv) digital photographs, which culminate in (v) a narrated animation. In this study, the authors present their theoretical framework, explain how the preservice teachers created a slowmation using a sequence of representations to show their science knowledge and discuss the implications of these findings for learners in universities and schools. © 2011 Wiley Periodicals, Inc. J Res Sci Teach 48: 985–1009, 2011  相似文献   

Children’s informal learning in the context of schools of the knowledge society     

Birgitte Holm S?rensen  Oluf Danielsen  Janni Nielsen 《Education and Information Technologies》2007,12(1):17-27

This paper builds on a key finding of a 5-year Danish research project con-cerning children in the 7 to 15 age group: children’s principal use of computers and the internet takes place in their spare time, and it is during their spare time that the majority of children really learn how to use interactive media. The project shows that in children’s spare-time use of ICT they employ informal forms of learning based to a large extent on their social interaction both in physical and virtual spaces. These informal learning forms can be identified as learning hierarchies, learning communities and learning networks; they are important contributions to the school of the knowledge society. The ICT in New Learning Environments project based on anthropologically inspired methods and social learning theories shows that students bring their informal forms of learning into the school context. This happens particularly when the school has undergone physical alterations and when its organisation of learning and teaching are also restructured, with project-based learning becoming an important part of the school work and with the media available in the learning environment. Using organisation theory, the school working with ICT and project-based learning is shown to simultaneously constitute a mixed mode between the school of the industrial and the knowledge society. The research shows that it is possible to tip the balance in the direction of the school of the knowledge society, and thus of the future, by comprehensively using ICT and project work in the day-to-day activities of the school, alongside and integrated with the traditional forms of learning, and not least by employing the informal learning processes children develop outside school. For teachers this will mean an extension of their function: no longer merely communicators of knowledge, they will have to become knowledge managers and overall leaders of projects, and this entails much more dialogue with the pupils.

Janni NielsenEmail:

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Modular microfluidic system as a model of cystic fibrosis airways     

M. Skolimowski  M. Weiss Nielsen  F. Abeille  P. Skafte-Pedersen  D. Sabourin  A. Fercher  D. Papkovsky  S. Molin  R. Taboryski  C. Sternberg  M. Dufva  O. Geschke  J. Emnéus 《Biomicrofluidics》2012,6(3)

A modular microfluidic airways model system that can simulate the changes in oxygen tension in different compartments of the cystic fibrosis (CF) airways was designed, developed, and tested. The fully reconfigurable system composed of modules with different functionalities: multichannel peristaltic pumps, bubble traps, gas exchange chip, and cell culture chambers. We have successfully applied this system for studying the antibiotic therapy of Pseudomonas aeruginosa, the bacteria mainly responsible for morbidity and mortality in cystic fibrosis, in different oxygen environments. Furthermore, we have mimicked the bacterial reinoculation of the aerobic compartments (lower respiratory tract) from the anaerobic compartments (cystic fibrosis sinuses) following an antibiotic treatment. This effect is hypothesised as the one on the main reasons for recurrent lung infections in cystic fibrosis patients.  相似文献   

Renal lactate elimination is maintained during moderate exercise in humans     

Volianitis S  Dawson EA  Dalsgaard M  Yoshiga C  Clemmesen J  Secher NH  Olsen N  Nielsen HB 《Journal of sports sciences》2012,30(2):149-153

Reduced hepatic lactate elimination initiates blood lactate accumulation during incremental exercise. In this study, we wished to determine whether renal lactate elimination contributes to the initiation of blood lactate accumulation. The renal arterial-to-venous (a-v) lactate difference was determined in nine men during sodium lactate infusion to enhance the evaluation (0.5 mol x L(-1) at 16 ± 1 mL x min(-1); mean ± s) both at rest and during cycling exercise (heart rate 139 ± 5 beats x min(-1)). The renal release of erythropoietin was used to detect kidney tissue ischaemia. At rest, the a-v O(2) (CaO(2)-CvO(2)) and lactate concentration differences were 0.8 ± 0.2 and 0.02 ± 0.02 mmol x L(-1), respectively. During exercise, arterial lactate and CaO(2)-CvO(2) increased to 7.1 ± 1.1 and 2.6 ± 0.8 mmol x L(-1), respectively (P < 0.05), indicating a -70% reduction of renal blood flow with no significant change in the renal venous erythropoietin concentration (0.8 ± 1.4 U x L(-1)). The a-v lactate concentration difference increased to 0.5 ± 0.8 mmol x L(-1), indicating similar lactate elimination as at rest. In conclusion, a -70% reduction in renal blood flow does not provoke critical renal ischaemia, and renal lactate elimination is maintained. Thus, kidney lactate elimination is unlikely to contribute to the initial blood lactate accumulation during progressive exercise.  相似文献   

Empowering Communities for Improved Educational Outcomes: Some Evaluation Findings from the World Bank     

H. Dean Nielsen 《Prospects》2007,37(1):81-93

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Primary and secondary cosmic rays,showers and bursts     

W.M. Nielsen 《Journal of The Franklin Institute》1938,226(5):628-630

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Product Quality Assurance Project for Teaching of Food Analysis     

S.S. Nielsen 《Journal of Food Science Education》2004,3(2):21-25

ABSTRACT: Two of the challenges in teaching Food Analysis are bringing relevance to the various chemical and physical analyses discussed and exposing students to the realities of quality assurance in the food industry. In a project to help meet those objectives, each student, with the assistance of a "resource person" from the food industry, completes the project as if he or she is responsible for the quality assurance analyses of a specific food product in a food company. The student identifies the chemical, physical, sensory, and microbial analyses for raw ingredients, in-process products, and the finished product. The project requires the student to participate in related class discussion, prepare a final written report, and make a brief class presentation. Analysis of survey data showed the project was more than moderately relevant or useful to former students working in the food industry, and related directly to the initial or current positions of most former students.  相似文献   

Prologue: Britain,Empire and the Olympic experience     

Erik Nielsen  Matthew P. Llewellyn 《Sport in Society》2015,18(7):759-764

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An intervention approach for children with teacher- and parent-identified attentional difficulties     

Semrud-Clikeman M  Nielsen KH  Clinton A  Sylvester L  Parle N  Connor RT 《Journal of learning disabilities》1999,32(6):581-590

Using a multimodal and multi-informant method for diagnosis, we selected 33 children by teacher and parent nomination for attention and work completion problems that met DSM-IV criteria for attention-deficit/hyperactivity disorder (ADHD). Of the 33 children in this group, 21 participated in the initial intervention, and 12 were placed in an ADHD control group and received the intervention after pre- and posttesting. A similarly selected group of 21 children without difficulties in attention and work completion served as a control group. Each child was assessed on pre- and posttest measures of visual and auditory attention. After an 18-week intervention period that included attention and problem-solving training, all children in the intervention and control groups were retested on visual and auditory tasks. Children in both ADHD groups showed significantly poorer initial performance on the visual attention task. Whereas the ADHD intervention group showed commensurate performance to the nondisabled control group after training, the ADHD control group did not show significant improvement over the same period. Auditory attention was poorer compared to the control group for both ADHD groups initially and improved only for the ADHD intervention group. These findings are discussed as a possible intervention for children with difficulties in strategy selection in a classroom setting.  相似文献   

On the status of critical theory   总被引：1，自引：0，他引：1  

Kai Nielsen 《Interchange》1992,23(3):265-284

Critical theory, while remaining in part a scientific social theory, is not just a scientific theory. The nature and distinctiveness of its criticalness is depicted. The logical status of a rationally reconstructed Habermasian critical theory is displayed, defended from some traditional criticisms (including charges of historical idealism), and contrasted with both historical versions of critical theory and purely scientific theories. Whether the critical theory articulated and defended is Habermasian, or a more historicized critical theory, in either case it is argued that it provides a sound basis forideologiekritik against postmodernist scepticism.  相似文献