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31.
INTRODUCTIONRibozymewasfirstdescribedbyCechandAltmanin 1 981 .ThisformofRNAhadhighlyspecificendonucleaseactivitiestoRNA (Krugeretal.,1 982 ) .Ribozymeshavethreestructures:hammerhead ,hairpinandaxeribozymes.Amongthem ,thehammerheadribozymehasasimplersecondarystruc…  相似文献   
32.
Abstract

Participant–practitioner relationships in community ‘sport-for-development’ practices are seen as central in working towards broader developmental outcomes. Using Noddings’ Ethics of Care as an analytical framework, we investigated relational strategies of practitioners in three community sport practices (Belgium) to understand the personal developmental potential of these relationships. Based on the data (participatory observations, interviews, focus groups), we identified the following themes that are viewed as fundamental in building relationships that hold the potential to instigate personal development for young people in disadvantaged situations: (a) time demanding interactions, (b) authenticity of practitioners, (c) equalizing expertise, (d) non-judgmental approach, (e) practitioners’ cultural capital, (f) co-organizing activities, (g) a ‘thousand chances’ philosophy, and (h) providing individual support. The identified themes can be used to develop youth-centred and qualitative evaluation methodologies that are more congruent with the daily work of community sport workers and, by doing so, go beyond a narrow quantitative ‘outcome-fixated’ evaluation dogma.  相似文献   
33.
Toward a spatial perspective on sustainability transitions   总被引:5,自引:1,他引:4  
In the past decade, the literature on transitions toward sustainable socio-technical systems has made a considerable contribution in understanding the complex and multi-dimensional shifts considered necessary to adapt societies and economies to sustainable modes of production and consumption. However, transition analyses have often neglected where transitions take place, and the spatial configurations and dynamics of the networks within which transitions evolve. A more explicit spatial perspective on sustainability transitions contributes to the extant transitions literature in three ways. Firstly it provides a contextualization on the limited territorial sensitivity of existing literature. Secondly, it explicitly acknowledges and investigates diversity in transition processes, which follows from a ‘natural’ variety in institutional conditions, networks, actor strategies and resources across space. Thirdly, it encompasses not only greater emphasis but also an opportunity to connect to a body of literature geared to understanding the international, trans-local nature of transition dynamics. Concerned with the prevalent lack of attention for the spatial dimensions of sustainability transitions in most studies, this paper seeks to unpick and make explicit sustainability transition geographies from the vantage point of economic geography. The paper argues that there are two interrelated problems requiring attention: the institutional embeddedness of socio-technical development processes within specific territorial spaces, and an explicit multi-scalar conception of socio-technical trajectories. Following these arguments, the paper concludes that transitions research would do well to take a closer look at the geographical unevenness of transition processes from the perspective of global networks and local nodes.  相似文献   
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35.
Patent indicators for the technology life cycle development   总被引:5,自引:0,他引:5  
Investments in a technology have to consider its current life cycle stage. The widespread approach of studying technology life cycles by measuring patent activity indices, especially patent applications, raises a practical problem: it requires the survey of all applications and applicants on a technological field. On the basis of an empirical study on pacemaker technology the paper identifies several patent indices as appropriate life cycle stage indicators which do not require the survey of the complete patent activity.  相似文献   
36.
Educational Psychology Review - Test anxiety is a widespread and mostly detrimental emotion in learning and achievement settings. Thus, it is a construct of high interest for researchers and its...  相似文献   
37.
Educational Psychology Review - The big-fish-little-pond effect (BFLPE), the negative effect of school-/class-average achievement on academic self-concept, is one of educational psychology’s...  相似文献   
38.
The paper describes the electronic guide HIPS that can be used duringthe process of a visit in a museum, i.e., for preparation, execution andevaluation. Users can access the system via the Web to prepare a visitby receiving information about the content and organization of anexhibition and practical issues like location and opening hours. Thevisitor can also prepare a tour for the actual visit or define hotspotswith important exhibits. The system should remind the user when on site.Once the user is in the museum he or she has two specific options to usethe system: the visitor can walk around in the museum and remainstanding where he or she finds an item of interest. The current locationin the room identified by infrared emitters at all exhibits triggers anindicator for the information presentation. Or, the visitor can select atour prepared by a curator, prepared by the user in advance (at home) orgenerated by the user ad hoc. In the museum, the information access isprovided via wireless technologies. This allows the user to accessinformation by moving in the physical space and navigating in theinformation space concurrently. The Web-based server approach allows foradaptive information selection and presentation based on a user modelevaluating the history of the usage of the system. The user canaccelerate the adaptation by specifying interests and preferences in theuser model. Before the visit the user can define tours and hotspots andenter annotations that will be presented or activated by the system inthe appropriate physical environment. After a visit in the museum theuser can evaluate the experience at home for further own inquiries orfor communication with other interested people. Thebefore-during-after-the-visit-support of visitors via nomadicinformation system has been designed based on evidence from ourquestionnaire pre-study, which showed that visitors actually useinformation available in or about museums before and also after avisit.  相似文献   
39.
This study investigates the effect of correctional instructions when detecting lies about relational aggression. Based on models from the field of social psychology, we predict that correctional instruction will lead to a less pronounced lie bias and to more accurate lie detection. Seventy-five teachers received videotapes of students’ true denial messages (e.g., students were innocent) and untrue denial messages (students were involved in relational aggression). A random half of the teachers were either given no further instructions or were told not to use stereotypical non-verbal cues when forming judgements (correctional instruction condition). As predicted, teachers in the correctional instruction condition were slightly better at detecting true than invented stories.  相似文献   
40.
This article explores the pedagogy of an urban Sport for Development (SfD) initiative in Belgium through the voices of young people. We draw on the critical pedagogy of Paulo Freire, and use qualitative research methods (i.e. observations, informal conversations, in-depth interviews and sharing circles) over a three-year period, to analyse the initiative’s actual pedagogical practice with key Freirean concepts (i.e. ‘banking education’, ‘dialogue’ and ‘dialogical action’) and virtues (e.g. respect for people’s knowledge, rejection of discrimination, caring for people). The findings reveal the presence of several Freirean virtues, emerging dialogue and, for some, action thought. Still, the SfD initiative remains at considerable distance from fully-fledged critical pedagogy. The young people in the SfD initiative nonetheless experience it as a space where they can be themselves, feel at home, gain respect, can learn to reflect and form opinions, and are temporarily freed from daily struggles such as discrimination. We discuss several pathways that could foster the capacity to organise and deliver a programme beyond emerging dialogue and action.  相似文献   
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