1,721,329 research outputs found
Whither pluralism in economics education? New empirical evidence
Full text linkIn the past two decades, dissatisfaction for the state of introductory economics teaching and standard textbooks has grown among economists, students and employers alike. The collective project under the acronym “CORE” – Curriculum Open-access Resources in Economics – has proposed a prominent alternative, fiercely criticized mostly by heterodox economists, which broadens the range of topics featured in the textbook, but presents them without emphasizing controversy and disagreement within the discipline (an approach their proponents have described as “pluralism by integration”). This paper provides preliminary empirical evidence on the question whether this approach leads to “indoctrination effects” similar to those the literature has highlighted for standard introductory economics courses. It finds evidence of these effects and identifies some students’ features associated with them. Overall, the results point to the need for a variant of pedagogical pluralism that places greater emphasis on the comparison of alternative perspectives without falling prey to “paradigm tournament”
Development and characterization of a lab-scale entrained flow reactor for testing biomass fuels
No full textAlternative fuels exhibit different features respect to traditional fuels and require an experimental characterization in conditions similar to those of practical applications (high temperature, high heating rate, low residence time). In this work, a lab-scale drop tube reactor is characterized and an experimental procedure is developed to test a bituminous coal and a biomass fuel at high heating rate in oxidative conditions. Thermogravimetric, size and SEM analyses are used to determine the conversion degree, the reactivity and the morphological variations (swelling, fragmentation, agglomeration) of solid residues in different operating conditions. Furthermore, a model is developed in order to simulate the fluidynamics, the energy balance and the mass transfer during the partial oxidation of fuel particles. The application of this model allows the residence time and the thermal history of the particle inside the drop tube to be estimated. The experimental and model results are in agreement, considering both configurations, namely, constant diameter and density models. (c) 2005 Elsevier Ltd. All rights reserved
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Spreading clio: A quantitative analysis of the first 25 years of the European review of economic history
No full textThis paper traces the history of the first 25 years of the European Economic History Review (EREH) comparing its initial agenda with its actual publication record and measuring its success with citation data. We rely on a database of all articles published in the EREH and in the four other top field journals from 1997 to 2020. The EREH has been a great success becoming, as planned at its establishment, the main outlet for continental European scholars and expanding somewhat its remit. Nonetheless, EREH needs to do an extra mile to fill the remaining gap with the more established field journals
Fe-Traps Influence on Time-dependent Breakdown Voltage in 0.1-μm GaN HEMTs for 5G Applications
No full textScaled (LG = 0.1 μm) GaN HEMT technology is currently pursued for high-frequency applications (such as 5G), requiring high current/speed and blocking capability. However, traps introduced with intentional Fe doping yield time-dependent breakdown voltage (VBR), seriously affecting reliability. Here, we investigate the role of Fe traps by pulsed I-V characterization performed at different pulse durations (TOFF). A TOFF-dependent VBR is observed on tested devices and is ascribed to the time-dependent occupancy of deep acceptors in the buffer layer. More specifically, the decrease in VBR for short pulses is attributed to the increased leakage due to the reduced ionization of Fe-traps. This interpretation is supported by 2D numerical simulations
Impact of Soft- and Hard-Switching transitions on VTH and RON Drifts in packaged SiC MOSFETs
No full textVariations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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