69 research outputs found
Acquiescent Spreaders: Occidentalism and Peripatetic Memory in Athens, Greece. COVID-19: Concepts of Sickness and Wellness
No full textIn this chapter, anthropologist and visual culture specialist Konstantinos Kalantzis explores Greek responses to the COVID19 pandemic and its global media coverage. He is particularly interested in questions of power and imagination as well as the problem of representing and visualizing “crisis”, with photographic meditations from a walk by the author/photographer
A spectral Newton-Schur algorithm for the solution of symmetric generalized eigenvalue problems. ETNA - Electronic Transactions on Numerical Analysis
No full textThis paper proposes a numerical algorithm based on spectral Schur complements to compute a few eigenvalues and the associated eigenvectors of symmetric matrix pencils. The proposed scheme follows an algebraic domain decomposition viewpoint and transforms the generalized eigenvalue problem into one of computing roots of scalar functions. These scalar functions are defined so that their roots are equal to the eigenvalues of the original pencil, and these roots are computed by Newton's method. We describe the theoretical aspects of the proposed scheme and demonstrate its performance on a few test problems
Students' subjectivities vs. dominant discourses in Greek L1 curriculum
No full textThe basic aim of this paper is to specify in what extent the current L1 curricula of compulsory education in Greece incorporate students' subjectivities (their lived experiences, views, beliefs, their interpretation of the world) fostering agency or opt for the reproduction of the socially dominant discourses (national culture and language). Adopting the theoretical framework of multiliteracies (The New London Group 1996, Cope & Kalantzis 2000) that proposes a pedagogy that opts for processes providing students with access to knowledge without them having to erase or abandon their different subjectivities, we define curriculum's properties that promote a dialogue of dominant ways of knowing and other marginal discourses and form a curriculum culturally open yet socially purposeful (Cope & Kalantzis 1993). After conducting qualitative content analysis (Mayring 2000; 2003) of the current L1 curricula, we reached interesting conclusions: while in lower grades (pre-school education and primary school) the curriculum seems to allow students to express both personal experiences and their views (although this orientation is somehow undermined by the same curriculum) promoting variety and diversity - up to a certain extent, in secondary education, where the framework becomes more restrictive due to specific reasons that are analysed, pluralistic practices have no place not even as intentions and the dominant discourses have to be learned and reproduced. Of course, by reproducing socially acceptable patterns, the student effectively reproduces world views reflected and social relationships embodied therein (Luke 1996). © Common Ground, Eleni Katsarou, Vassilis Tsafos
Authors publication strategies in scholarly publishing
No full textIn this exploratory study, we analyze publishing patterns of authors from different disciplines, as part of a broader analysis of the transformation of the scholarly publishing industry. Although a growing body of literature analyses the author’s role within the process of research production,
validation, certification and dissemination, there is little systematic empirical research on publishing patterns; little therefore can be said on relevant issues within the current debate on the future of scholarly publishing such as
authors’ responses to (or even awareness of) the growing array of publication possibilities or the speed of adaptation to the increasing series of incentives by
funding agencies or academic institutions. On the basis of the analysis of three years of publications gathered in the institutional repository of Università degli Studi di Milano, we highlight trends of publication strategies and
different responses to incentive systems. Preliminary results indicate that publication outcomes and intensity differ across disciplines, while similarities occur mainly in terms of choice of preferred outcomes by seniority. Open
access is still uncommon among the authors in our sample and it is more utilized by relatively senior authors and active authors
The Work and Play of the Mind in the Information Age
No full textThis book tells a series of living stories about a domain of social activity, "the work and play of the mind," in a particular historical epoch: the "information age." The stories concern political processes and movements as varied as the World Trade Organization's Trade-Related Aspects of Intellectual Property Rights, China's Great Firewall, practices of image sharing in social media, Occupy Wall Street, The Arab Spring, The Alt-Right, and the use of geographical indications by indigenous peoples and farmers to defend their lifestyles. In its theoretical analysis, the book illuminates four alternative political agendas for the work and play of the mind. These four "propertyscapes" represent competing visions for social life, framing projects for collective political action that are at times competing, at times overlapping. The author prompts us to consider whose property is the work and play of the mind, as well as addressing larger questions regarding the framing of political space, the kinds of political communities we may need for the future, and the changing place of the work and play of the mind within these social imaginaries. The book will be of interest to students and scholars across a range of disciplines including media and communications, arts and design, law, politics and interdisciplinary social sciences.
Regenerative Ulam-von Neumann Algorithm: An Innovative Markov chain Monte Carlo Method for Matrix Inversion
No full textThis paper presents an extension of the classical Ulan-von Neumann Markov
chain Monte-Carlo algorithm for the computation of the matrix inverse. The
algorithm presented in this paper, termed as \emph{regenerative Ulam-von
Neumann algorithm}, utilizes the regenerative structure of classical,
non-truncated Neumann series defined by a non-singular matrix and produces an
unbiased estimator of the matrix inverse. Furthermore, the accuracy of the
proposed algorithm depends on a single parameter that controls the total number
of Markov transitions simulated thus avoiding the challenge of balancing
between the total number of Markov chain replications and its corresponding
length as in the classical Ulam-von Neumann algorithm. To efficiently utilize
the Markov chain transition samples in the calculation of the regenerative
quantities, the proposed algorithm quantifies automatically the contribution of
each Markov transition to all regenerative quantities by a carefully designed
updating scheme that utilized three separate matrices containing the current
weights, total weights, and regenerative cycle count, respectively. A
probabilistic analysis of the performance of the algorithm, including the
variance of the estimator, is provided. Finally, numerical experiments verify
the qualitative effectiveness of the proposed scheme
Domain decomposition approaches for accelerating contour integration eigenvalue solvers for symmetric eigenvalue problems
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