The effect of network size on intra-network knowledge processes

This paper addresses a neglected topic in the knowledge management literature: how the size of a network of actors affects the nature of intra-network social relations and knowledge processes. It makes a theoretical contribution to developing understanding in this area drawing on a range of literatures including practice-based perspectives on knowledge, the literature on the embeddedness of social relations, and relevant knowledge management literature. The central focus of this paper is on the relationship between network size, network density, and how these variables affect intra-network knowledge processes. It suggests that as network size increases network density is likely to decrease (as it becomes problematic for the actors in such networks to retain strong ties with a significant proportion of the network's members), which it will be suggested has significant ramifications for intra-network knowledge processes. This paper concludes by reflecting on the implications of the ideas developed for network-based forms of organizing, and innovation processes.     

与Brad对话 妈妈不让我用化妆品(英文)

Flora看见别的女生使用化妆品,自己也很想试试,可妈妈不允许她用。妈妈认为学生根本没有必要使用化妆品,女孩子自然健康就很漂亮。     

Element‐and‐Principles Instruction,Perceptual Drawing and Paul Klee's Pedagogical Sketchbook

This study examines the key concepts of elements‐and‐principles art instruction, as defined in the publications by Vorkurs (preliminary course) instructors at the Bauhaus. Elements‐and‐principles instruction was for decades central to formalist art training, and continues to play a role, albeit limited, today. Preceding accounts of the elements‐and‐principles have not considered contextual matters worthy of attention, specifically, two other instructional frameworks. One is perceptual drawing that dominated in Western art culture before the inception of the elements‐and‐principles approach. The second is the instructional model Paul Klee proposed in his well‐known but under‐examined instructional publication of 1925, Pedagogical Sketchbook. With regard to the latter, scholars have failed to undertake detailed analysis that would explain Klee's instructional model and, in particular, its central (and idiosyncratic) concept of ‘trichotomy’. Trichotomy is a structure rather than a formal element, providing visual equivalents for extra‐visual events. The peculiarity of trichotomy and related concepts in Pedagogical Sketchbook has kept the publication a faint presence in elements‐and‐principles instruction and in related scholarly inquiry. With a more precise presentation of Klee's pedagogical focus, this study distinguishes heretofore overlooked dissimilarities between the Pedagogical Sketchbook model and elements‐and‐principles approach, and enables recognition of affinities between Klee's model and current conversations about embodiment pedagogies in visual arts education.     

The evaluation of faculty development programs

This article reviews literature pertinent to the evaluation of faculty development programs and presents data from several studies conducted at two institutions. These data were consistent with those previously reported in that faculty participants consistently expressed satisfaction with development services. In addition, one study found that most faculty members voluntarily took some action to improve their instructional effectiveness, though only a minority pursued these efforts in depth. Volunteers who worked intensively with a faculty development consultant improved more on objective measures of effectiveness than did those who were only superficially involved in improvement efforts; those who received no consultative assistance failed to improve significantly. Evidence from a final study provided a control for faculty motivation and led to the conclusion that improvement was contingent both on faculty desire to improve and on the availability of professional assistance.     

Pigeons see the Ponzo illusion

Three experiments were performed to address factors contributing to the Ponzo illusion. In Experiment 1, pigeons learned to peck at the longer of two bars in varying line contexts. When these lines converged, the birds had difficulty in learning several patterns in which a Ponzo illusion would reduce the perceived difference. In Experiment 2, the subjects chose one response if a stimulus bar was longer than a predetermined length and a second response for shorter bars. The subjects were more likely to choose “long” as the stimulus bar approached the apex of converging lines. These results suggested that pigeons experience the Ponzo illusion. In Experiment 3, the effects of contexts that did and did not form a texture gradient were compared. The magnitude of the illusion did not differ according to context lines. This result failed to support a perspective theory of the Ponzo illusion.     

Research Abstracts

Educational technology research and development -     

Model of affective learning for nonformal science education facilities

Objective setting and evaluation for learning in the affective domain are often neglected in educational programs, largely because affective learning is a poorly understood phenomenon. This is particularly problematic in nonformal science education facilities, which are uniquely suited to facilitate affective learning. To address this problem, a heuristic model of affective learning in nonformal educational facilities was developed. The model, referred to as the Meredith Model, displays a sequence of events occurring in the affective responses of learners in nonformal educational experiences and identifies factors which may influence individual events within this sequence. The model is proposed as a conceptual framework for gaining an increased understanding of affective learning and for making recommendations for practice of nonformal science education and for further research. J Res Sci Teach 34: 805–818, 1997.