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Jonas O. Rosenthal 《Innovative Higher Education》1982,6(4):214-228
As freshmen in 1966, 26 students at a liberal arts college entered Program II, and experiment in individualized education which relieved them from usual collegiate requirements for all four years. Twelve years later, 22 of these participants, plus 19 nonparticipating classmates of 1970, were interviewed. Except for their evaluation of their college experience (Program II participants were more negative about it), participants and nonparticipants are indistinguishable on comparisons of post-graduate education, occupational history, family and residential patterns, leisure activities, and attitudes toward self.This research was supported by a grant from the Mellon Foundation. 相似文献
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Rodrigo P. Lemos Jonas A. Kunzler Diego F. Burgos B. Mário J. de Souza Hugo V.L. e Silva Yroá R. Ferreira Edna L. Flôres Oliver Sander 《Journal of The Franklin Institute》2019,356(9):4949-4969
SEAD method estimates the direction-of-arrival angles on an uniform linear array based on the difference between the two largest singular values, what is called differential spectrum. Although it presented an outstanding performance, the ability to indicate the source positions was not elucidated yet. Inspired by the differential spectrum formulation we derived a total differential spectrum and found out that the matrix norm induced by the vector 2-norm of a modified spatial covariance matrix can be used to estimate the direction-of-arrival of multiple plane waves. Indeed we show that matrix norms are estimators and we propose their use instead of the singular value decomposition in SEAD-based methods. We present a general mathematical expression in order to explicit the operating principles of the proposed methods. Consequently, we were able to explain how the relation between the arriving and the search angles produces the larger peaks on the differential spectrum. To evaluate the important role played by matrix norms, a thousand experiments were carried out. They showed that the proposed approach proved to be as accurate as the previous SEAD-based methods, while providing a significant reduction on runtime. It also outperformed well-established methods like MODEX regarding the estimation error. 相似文献
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As knowledge production becomes more specialized, studying complex and multi-faceted empirical realities becomes more difficult. This has created a growing need for cross-fertilization and collaboration between research disciplines. According to prior studies, the sharing of concepts, ideas and empirical domains with other disciplines may promote cross-fertilization. We challenge this one-sided view. Based on an analysis of the parallel development of the neighboring disciplines of innovation studies and project management, we show that the sharing of concepts and empirical domains can have ambivalent effects. Under conditions of ideological distancing, shared concepts and domains will be narrowly assimilated ? an effect we call ‘encapsulation’ – which creates an illusion of sharing, while promoting further self-containment. By comparison, reflexive meta-theories and cross-disciplinary community-building will enable a form of sharing that promotes cross-fertilization. Our findings inform research on research specialization, cross-fertilization and effectiveness of interdisciplinary collaboration. 相似文献
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Manuel Jonas Steinbauer Andreas Gohlke Christine Mahler Andreas Schmiedinger Carl Beierkuhnlein 《Journal of Cultural Heritage》2013,14(3):219-228
Historic buildings are important for cultural history and provide a variety of habitats for animals and plants. Especially structural heterogeneity of wall surfaces is perceived to support biological diversity. Nevertheless, in traditional approaches goals of biodiversity preservation and monument restoration are perceived to interfere and to be mutually exclusive. As a consequence, priority is often given to constructional restoration accepting the loss of local populations and biodiversity. At walls of medieval castles, including an experimental restoration project where conventional and less intensive restoration techniques were applied, we relate species composition and richness to wall properties. Especially wall surface structure is quantified using a novel approach. The study focuses on lichens, mosses and vascular plants. Boosted regression tree analyses and non-metric multidimensional scaling techniques are applied to detect the influence of abiotic site conditions on biodiversity. We find species richness to be promoted by wall surface heterogeneity. However, species composition is more affected by restoration approaches than species richness. Lichen composition varies considerably while vascular plants and mosses are less affected by wall properties. We suggest strategies that are combining both societal targets, the preservation of historic monuments and of species diversity. Careful restoration is capable of supporting both, the maintenance of cultural heritage and of rare and unique anthropogenic habitats. Wall surface heterogeneity needs to be witnessed for both aspects as it affects both species composition as well as the effectiveness of cleaning methods. 相似文献
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Fedrigo Laurence Udayar Shagini Toscanelli Cecilia Clot-Siegrist Eva Durante Federico Masdonati Jonas 《International Journal for Educational and Vocational Guidance》2022,22(2):407-428
International Journal for Educational and Vocational Guidance - A major challenge for refugees and asylum seekers is social and professional integration. Using constructivist and capability... 相似文献
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Jared Keengwe Gary Schnellert Denise Jonas 《Education and Information Technologies》2014,19(2):441-450
The millennials use mobile phones on a daily basis to keep in touch with family and friends (Lenhart 2010). However, the role of mobile phones in education needs to be close examined as educators strive to incorporate mobile leaning devices in the classroom. Consequently, schools will not only need to evaluate their school curriculums but also recognize the power in the digital devices to engage, enable, and empower Gen-M and iGen learners. Therefore, the purpose of this article is to provide a rationale for the need for administrators to design guidelines for schools planning to adopt mobile phones in their curricula. Additionally, this article is intended to stimulate reflections on effective ways to adopt mobile phones in education to engage learners. 相似文献
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Emma Armstrong-Carter Jonas G. Miller Liam J. B. Hill Benjamin W. Domingue 《Child development》2021,92(4):1509-1522
Children raised in neighborhoods with low socioeconomic status (SES) are at risk for low academic achievement. Identifying factors that help children from disadvantaged neighborhoods thrive is critical for reducing inequalities. We investigated whether children’s prosocial behavior buffers concurrent and subsequent academic risk in disadvantaged neighborhoods in Bradford, UK. Diverse children (N = 1,175) were followed until age seven, with measurements taken at four times. We used governmental indices of neighborhood-level SES, teacher observations of prosocial behaviors, and direct assessments of academic achievement. Neighborhood SES was positively associated with academic achievement among children with low levels of prosocial behavior, but not among children with high levels of prosocial behavior. Prosocial behavior may mitigate academic risk across early childhood. 相似文献