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While bookstores play the vital role in book distribution, little attention has been paid to concentration and conglomerate ownership in the retail book trade. In 1958, one-store book firms accounted for nearly 80 percent of book sales; by 1982 that figure had fallen to 26 percent even though single-store retailers continue to account for a majority of all bookstore outlets. Today the chains control at least 54 percent of bookstore sales. Buoyed by discriminatory discounts and publisher-subsidized advertising campaigns, the chains’ dramatic growth seems likely to continue despite the fact that they are less profitable than independent booksellers. The chains’ marketing orientation fits well with changes in the broader publishing industry, as publishers seek to rationalize operations in order to improve the bottom line. As books become just another commodity, sold through increasingly centralized and monopolized channels, access for alternative and minority voices is being for-closed.  相似文献   
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Prior research on pretrial publicity has produced mixed results and a roughly equal number of studies show an effect, show no effect, or show mixed results. We explored the effects of (a) homogenous vs. heterogeneous exposure (whether deliberating jurors were all exposed to the same publicity or not) and (b) pre-deliberation queries as potential contributors to mixed results. We found an effect for positive but not negative publicity on conviction rates but not evidence ratings. Exposure heterogeneity appears to explain these differences and pre-deliberation queries did appear to play some role in the obtained outcomes. Overall these findings do not replicate a robust publicity effect and future research should consider how homogeneous exposure and pre-deliberation opinion queries influence results.  相似文献   
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The purpose of this study was to analyse the effect of bike type – the 26-inch-wheel bike (26“ bike) and the 29-inch-wheel bike (29“ bike) – on performance in elite mountain bikers. Ten Swiss National Team athletes (seven males, three females) completed six trials with individual start on a simulated cross-country course with 35 min of active recovery between trials (three trials on a 26“ bike and three trials on a 29“ bike, alternate order, randomised start-bike). The course consisted of two separate sections expected to favour either the 29“ bike (section A) or the 26“ bike (section B). For each trial performance, power output, cadence and heart rate were recorded and athletes’ experiences were documented. Mean overall performance (time: 304 ± 27 s vs. 311 ± 29 s; P < 0.01) and performance in sections A (P < 0.001) and B (P < 0.05) were better when using the 29“ bike. No significant differences were observed for power output, cadence or heart rate. Athletes rated the 29“ bike as better for performance in general, passing obstacles and traction. The 29“ bike supports superior performance for elite mountain bikers, even on sections supposed to favour the 26“ bike.  相似文献   
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This study describes one teacher's use of multimedia, specifically CD-ROM talking books, in the classroom. The goal of the investigation was to reveal and analyse how a primary (Grade 3) teacher integrated CD-ROM books into her curriculum. Issues emerging from the study included how features of the software interact with features of classrooms, how patterns of instruction are affected by the infusion of technology, and how students interact with the software, and each other, while reading the CD- ROM books  相似文献   
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Telematics has the potential to transform Higher Education through creating a distributed community of tutors and students. Videotutoring is central to telematics, enabling personal tutoring to occur at a distance. Within the context of a post-graduate teacher training course, videotutoring was used to tutor two students during the first six weeks of their first full-time school placement. Both ends of the videosignal were recorded. Analysis of the tapes used a protocol based upon research into non-verbal communication (NVC). NVC is as important as verbal communication in the tutorial process. Findings suggest that the interaction of participants mediated through the screen was significantly different from face-to-face communication in relation to the two-dimensional image of the screen and the "viewing frame" effect of the physical boundaries of the image. The viewing frame literally served as the proscenium arch of a theatre. Two-dimensionality and the viewing frame effect emphasised both the positive and negative elements in inter-personal communication as represented in Argyle's social skills and Goffman's theatrical models. The conclusion is that videotutoring can potentially be a more effective form of tutoring than face-to-face interaction.  相似文献   
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Conclusion Considering the technology gender gap that exists today, there can be no doubt that our current educational system is not engaging female students in technology or awakening them to possibilities of the technology industry as a career. Females are not afraid of computers or lack the ability to master computer skills, but they find the computer environment objectionable (http : / / www.aauw.org/2000/ techsavvybd.html). Several factors within the educational system heighten these objections and impede female progression through technology classes. It is these factors that our educational system must address. Single-sex computer classes offer female students the educational advantages of learning in a comfortable, non-threatening classroom environment where they are encouraged to enthusiastically participate in classroom discussions and activities (Kumagi, 1995). In these classes, curriculum may be adjusted to reflect the need females to see computers as productivity tools (Caplice, 1994). As a result of positive experiences gained while attending single-sex computer classes, females are more likely to pursue higher level computer classes. Although it is possible to argue that single-sex computer classes do not mirror the real world females must contend with once outside the classroom, they are, however, effective interim interventions to enable females to lessen the current technology gap (Kumagi, 1995).  相似文献   
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