How is “Knowledge” Constructed During Science Activities? Detaching Instructional Effects of “Playing” and “Telling” to Optimize Integration of Scientific Investigations     

Zhang  Lin  Van Reet  Jennifer 《Research in Science Education》2022,52(5):1435-1449

Research in Science Education - Despite recommendations from science educational standards which claim that science teaching should engage students in scientific investigations the same way...  相似文献   

Digital body preservation: Technique and applications     

Vicky Vandenbossche  Joris Van de Velde  Stind Avet  Wouter Willaert  Stian Soltvedt  Noeska Smit  Emmanuel Audenaert 《Anatomical sciences education》2022,15(4):731-744

High-fidelity anatomical models can be produced with three-dimensional (3D) scanning techniques and as such be digitally preserved, archived, and subsequently rendered through various media. Here, a novel methodology—digital body preservation—is presented for combining and matching scan geometry with radiographic imaging. The technique encompasses joining layers of 3D surface scans in an anatomical correct spatial relationship. To do so, a computed tomography (CT) volume is used as template to join and merge different surface scan geometries by means of nonrigid registration into a single environment. In addition, the use and applicability of the generated 3D models in digital learning modalities is presented. Finally, as computational expense is usually the main bottleneck in extended 3D applications, the influence of mesh simplification in combination with texture mapping on the quality of 3D models was investigated. The physical fidelity of the simplified meshes was evaluated in relation to their resolution and with respect to key anatomical features. Large- and medium-scale features were well preserved despite extensive 3D mesh simplification. Subtle fine-scale features, particular in curved areas demonstrated the major limitation to extensive mesh size reduction. Depending on the local topography, workable mesh sizes ranging from 10% to 3% of the original size could be obtained, making them usable in various learning applications and environments.  相似文献   

Co-ownership of intellectual property: Exploring the value-appropriation and value-creation implications of co-patenting with different partners     

René Belderbos  Bruno Cassiman  Dries Faems  Bart Leten  Bart Van Looy 《Research Policy》2014

Combining both interview data and empirical analyses at the patent and firm levels, we explore the value-appropriation and value-creation implications of R&D collaboration resulting in the co-ownership of intellectual property (i.e. co-patents). We make an explicit distinction between three different types of co-patenting partners: intra-industry partners, inter-industry partners, and universities. Our findings indicate that the value-appropriation challenges of IP sharing are clearly evident with intra-industry co-patenting, where partners are more likely to encounter overlapping exploitation domains. Co-patenting with universities is associated with higher market value, since appropriation challenges are unlikely to play a role and collaboration may signal novel technological opportunities. Although we find some evidence that co-patenting corresponds to higher (patent) value, patents co-owned with firms are significantly less likely to receive self-citations, indicating constraints on the future exploitation and development of co-owned technologies.  相似文献   

Hooligans,Casuals, Independents: Decivilisation or Rationalisation of the Activity?     

Dominique Bodin  Luc Robène 《国际体育史杂志》2014,31(16):2013-2033

If there is one phenomenon which highlights the lack of role distance of certain sport actors, it is obviously hooliganism. In the mid-1980s, Norbert Elias and Eric Dunning became interested in the role played by modern sports in the ‘civilising process’ and, analysing the violence of sport crowds, introduced a culturalist interpretation of the actions. They were considered to be the work of members of the ‘rough working class’, who were less advanced in the ‘civilising process’ and had still not achieved sufficient self-control. In these groups, characterised by social functioning in the form of a segmentary bond, violence was thought to be a traditional way of resolving conflicts, a significant aspect and essential part of their ethos. This is an over-determined interpretation of the violence of sports crowds which naturalises and socialises this violence. This vision poses a problem, that of the negation of any logic on the part of the actors involved. This viewpoint leads us to consider violence as a social product and a ‘practical accomplishment’, the result of the way in which supporters interpret and live in the world that surrounds them, and, as such, it is the individual and collective motives and purposes that should be investigated.  相似文献   

Effects of swing-weight on swing speed and racket power     

Rod Cross  Rob Bower 《Journal of sports sciences》2013,31(1):23-30

Abstract

Measurements are presented of the speed at which six different rods could be swung by four male students. Three of the rods had the same mass but their swing-weight (i.e. moment of inertia) differed by large factors. The other three rods had the same swing-weight but different masses. Our primary objective was to quantify the effects of mass and swing-weight on swing speed. The result has a direct bearing on whether baseball, tennis, cricket and golf participants should choose a heavy or light implement to impart maximum speed to a ball. When swinging with maximum effort, swing speed (V) was found to decrease as swing-weight (I _o) increased, according to the relation V?=?C/I _o ⁿ , where C is a different constant for each participant and n?=?0.27 when I _o >?0.03 kg?·?m². Remarkably similar results were obtained previously with softball bats (where n?=?0.25) and golf clubs (where n?=?0.26). Swing speed remained approximately constant as swing mass increased (when keeping swing-weight fixed). The implications for racket power are discussed.  相似文献   

Desalination of masonry structures: Fine tuning of pore size distribution of poultices to substrate properties     

Barbara Lubelli  Rob P.J. van Hees 《Journal of Cultural Heritage》2010,11(1):10-18

Desalination is a relatively new intervention in the field of conservation of architectural heritage. Especially the desalination of immovable objects, such as masonry structures, is still a trial-error practice. In the field, different desalination materials and methods are used, sometimes with unsatisfactory results. Better understanding of the desalination process is needed in order to support the conservator with clear guidelines for choosing a suitable desalination material and method. The research presented in this paper constitutes the first step towards the development of a modular system of poultices, which can be adapted, i.e. fine-tuned to different types of substrates. Starting point is to make use of advection, i.e. the transport of salt ions with water flow. This transport mechanism is faster than diffusion and the application on immovable objects is relatively easy. In order to optimize salt extraction, a poultice working by advection should have smaller pores than the substrate. Starting from this principle the pore sizes of different desalination materials (sand, cellulose, kaolin and bentonite) mixed in different proportions, have been measured. Interesting results were obtained, showing that the desalination materials commonly used in the field are often not the most suitable ones. On the basis of the results, recipes for poultices, adapted to a specific substrate, can be formulated.  相似文献   

Korean cinema on the road to globalization: tracking global/local dynamics,or why Im Kwon-Taek is not Ang Lee     

Rob Wilson 《Inter-Asia Cultural Studies》2013,14(2):307-318

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The impact of electric overhead radiant heating on the indoor environment of historic churches     

Lucyna Samek  Anna De Maeyer-Worobiec  Zoya Spolnik  Lszl Bencs  Velichka Kontozova  &#x;ukasz Bratasz  Roman Koz&#x;owski  Ren Van Grieken 《Journal of Cultural Heritage》2007,8(4):361-369

The impact of electric overhead radiant heaters on the microclimate, air flows, transport and deposition of suspended particulate matter (SPM) was monitored between March 2004 and March 2005 in the historic churches of Saint Michael Archangel in Szalowa and Saint Catherine in Cracow (Poland). The measurements show that although irradiation at the floor level increases temperature and reduces relative humidity in the interior of the church, the effect out of the heated zone and for the surfaces sheltered from irradiation is very limited, i.e. their extent is comparable with natural fluctuations inherent to the local climate of the church. The radiant heaters proved to generate little convectional flow of the air. Therefore, the heating system was not found to increase the concentration of SPM indoors; in particular, no re-suspension of particles already present in the church was observed. This work has demonstrated that the overhead radiant heaters are capable of providing localised heat to the areas where people congregate without adversely affecting painted walls and the works of arts displayed in churches. Care, however, should be taken that sensitive works of art are not exposed to the direct infrared radiation.  相似文献   

Heart Like Water: Surviving Katrina and Life in Its Disaster Zone by Joshua Clark     

Kristin Van Tassel 《Journal of American culture (Malden, Mass. : 2003)》2008,31(1):112-113

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Editorial     

Van Esbroeck  Raoul 《International Journal for Educational and Vocational Guidance》2004,4(1):1-2

International Journal for Educational and Vocational Guidance -  相似文献