977 resultados para display technics


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The present study examined the role that group norms, group identification, and imagined audience (in-group vs. out-group) play in attitude-behavior processes. University students (N = 187) participated in a study concerned with the prediction of consumer behavior. Attitudes toward drinking their preferred beer, subjective norm, perceived behavioral control, group norm, and group identification were assessed. Intentions and perceived audience reactions to consumption were assessed. As expected, group norms, identification, and imagined audience interacted to influence likelihood of drinking one's preferred beer and perceived audience reactions. High identifiers were more responsive to group norms in the presence of an in-group audience than an out-group audience. The present results indicate that audience concerns impact upon the relationship between attitude., and behavior.

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Computer display height and desk design to allow forearm support are two critical design features of workstations for information technology tasks. However there is currently no 3D description of head and neck posture with different computer display heights and no direct comparison to paper based information technology tasks. There is also inconsistent evidence on the effect of forearm support on posture and no evidence on whether these features interact. This study compared the 3D head, neck and upper limb postures of 18 male and 18 female young adults whilst working with different display and desk design conditions. There was no substantial interaction between display height and desk design. Lower display heights increased head and neck flexion with more spinal asymmetry when working with paper. The curved desk, designed to provide forearm support, increased scapula elevation/protraction and shoulder flexion/abduction.

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The ethnographic museum in the West has a long and troubling history. The display of 'exotic peoples' in travelling exhibitions began as early as the sixteenth century, but it was the mid and late nineteenth century that saw the great expansion of museums as sites to show artefacts collected - under anything but reputable circumstances - from what were considered the 'primitive', 'natural', or 'tribal' peoples of the world. Today the ethnographic museum is still a feature of large European cities, though faced with newly formulated dilemmas in the postcolonial world. For how can the material culture of a non-western people be collected and displayed in the West without its makers being translated into wordless and powerless objects of visual consumption? In national museums the processes of choosing, contextualizing and commentating exhibits help form national identity; in the ethnographic museum, similarly, they shape perceptions of the apparently distant Other. Like written ethnography, the museum is a 'translation of culture', with many of the associated problems traced by Talal Asad (1986). Like the written form, it has to represent the dialogic realities of cultural encounters in a fixed and intelligible form, to propose categories that define and order the material it has gathered. As the public face of academic ethnography, the museum interprets other cultures for the benefit of the general reader, and in that task museum practice, like all ethnography, operates within very specific historical and political parameters. How are museums in western Europe responding to the issues raised by critical ethnographers like James Clifford (1988), with their focus on the politics of representation? Is globalisation increasing the degree of accountability imposed on the ethnographic museum, or merely reinforcing older patterns? What opportunities and problems are raised by the use of more words - more 'translation' in the narrower sense - in ethnographic museums, and how do museums gain from introducing a reflexive and contextualizing concept of "thick translation" (Appiah 1993) into their work of interpretation?

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Adjuvants are often composed of different constituents that can be divided into two groups based on their primary activity: the delivery system which carries and presents the vaccine antigen to antigen-presenting cells, and the immunostimulator that activates and modulates the ensuing immune response. Herein, we have investigated the importance of the delivery system and in particular its physical characteristics by comparing the delivery properties of two lipids which differ only in the degree of saturation of the acyl chains, rendering the liposomes either rigid (DDA, dimethyldioctadecylammonium) or highly fluid (DODA, dimethyldioleoylammonium) at physiological temperature. We show that these delivery systems are remarkably different in their ability to prime a Th1-directed immune response with the rigid DDA-based liposomes inducing a response more than 100 times higher compared to that obtained with the fluid DODA-based liposomes. Upon injection with a vaccine antigen, DDA-based liposomes form a vaccine depot that results in a continuous attraction of antigen-presenting cells that engulf a high amount of adjuvant and are subsequently efficiently activated as measured by an elevated expression of the co-stimulatory molecules CD40 and CD86. In contrast, the fluid DODA-based liposomes are more rapidly removed from the site of injection resulting in a lower up-regulation of co-stimulatory CD40 and CD86 molecules on adjuvant-positive antigen-presenting cells. Additionally, the vaccine antigen is readily dissociated from the DODA-based liposomes leading to a population of antigen-presenting cells that are antigen-positive but adjuvant-negative and consequently are not activated. These studies demonstrate the importance of studying in vivo characteristics of the vaccine components and furthermore show that physicochemical properties of the delivery system have a major impact on the vaccine-induced immune response. © 2012 Elsevier B.V. All rights reserved.

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We have successfully linked protein library screening directly with the identification of active proteins, without the need for individual purification, display technologies or physical linkage between the protein and its encoding sequence. By using 'MAX' randomization we have rapidly constructed 60 overlapping gene libraries that encode zinc finger proteins, randomized variously at the three principal DNA-contacting residues. Expression and screening of the libraries against five possible target DNA sequences generated data points covering a potential 40,000 individual interactions. Comparative analysis of the resulting data enabled direct identification of active proteins. Accuracy of this library analysis methodology was confirmed by both in vitro and in vivo analyses of identified proteins to yield novel zinc finger proteins that bind to their target sequences with high affinity, as indicated by low nanomolar apparent dissociation constants.