21,707 research outputs found
Confronting the Past. Trauma, History and Memory in Wajda’s film
Confronting the Past. Trauma, History and Memory in Wajda’s filmHistorical films are important carriers of collective memory, and as a genre historical films can activate both strong feelings and strong debate. Historical fiction films often tell very accurate and almost documentary stories, but fictional films have the freedom to make historical reality in quite another way than factual historical films. This article deals with some of the most important historical film genres and uses a general theory of genres, emotions, memory and history to analyse the historical films of Polish film director Andrzej Wajda, especially those made post 1989. Dealing with both his heritage drama Pan Tadeusz (1999) and critical historical drama Katyń (2007), the article analyses the ways in which Wajda uses historical narratives to comment on both history and contemporary society, and how this strategy is reflected in all his historical films. The article argues that the traumatic and contrast-filled history of Poland makes historical films especially important and interesting as a critical part of public debate and the reframing and reinterpretation of the past
Rational homotopy theory of automorphisms of manifolds
We study the rational homotopy types of classifying spaces of automorphism
groups of smooth simply connected manifolds of dimension at least five. We give
dg Lie algebra models for the homotopy automorphisms and the block
diffeomorphisms of such manifolds.
Moreover, we use these models to calculate the rational cohomology of the
classifying spaces of the homotopy automorphisms and block diffeomorphisms of
the manifold #^g S^d x S^d relative to an embedded disk as g tends to infinity.
The answer is expressed in terms of stable cohomology of arithmetic groups and
invariant Lie algebra cohomology. Through an extension of Kontsevich's work on
graph complexes, we relate our results to the (unstable) homology of
automorphisms of free groups with boundaries.Comment: 83 pages. Revision of v2 prompted by referee comments. Final version,
to appear in Acta Mathematic
Widespread Adoption of Information Technology in Primary Care Physician Offices in Denmark: A Case Study
Describes the use of electronic medical records, standardized clinical communications, and patient identification numbers by Denmark's primary care physicians; a nonprofit organization's role in implementation and certification; and elements of success
On the K-theory of local fields
The authors establish a connection between the Quillen K-theory of certain
local fields and the de Rham-Witt complex of their rings of integers with
logarithmic poles at the maximal ideal. They consider fields K that are
complete discrete valuation fields of characteristic zero with perfect residue
fields k of characteristic p > 2. They evaluate the K-theory with
Z/p^v-coefficients of K, and verify the Lichtenbaum-Quillen conjecture for K.Comment: Abstract added in migration; 113 pages, published versio
Yield of spring barley mixtures as a function of varietal and environmental characteristics
To design good variety mixtures it is important to understand the influence of varietal and environmental characteristics on mixing effect, e.g. what characteristics are more beneficial when all mixed varieties express it highly and what characteristics are more beneficial when the mixed varieties express it to varying extent. However, as it is generally impossible to manage more than a few experimental combinations in each field trial, information on general relationships and factors of importance for the successful design of variety mixtures may be overlooked. Using meta-regression (e.g. Houwelingen et al. 2002), numerous results of such trials can be combined, and the influence of varietal and environmental factors on mixing effect can be elucidated.
Here, two specific hypotheses were investigated:
1. Variation in straw length among component varieties will increase mixing effect due to enhanced potential for resource utilization.
2. Mixing effect will increase with more stressful environments due to increased importance of mechanisms like complementarity and compensation.
Meta-analyses with and without covariates were applied to test the hypotheses and elucidate factors of importance for mixing success.
The simple meta-analysis showed significant overall increase in yield due to mixing of varieties in spite of slightly opposing results between individual trials. However, the meta-regressions were unable to support the two hypotheses: the mixing effect was not affected by component variation in straw length, and the mixing effect was slightly increasing with environmental yield potential, which was actually arguing against the hypothesis. Further analyses must be done to investigate whether these trends can be found in other data sets and whether further covariates may assist interpretation.
The results also show that experimental trials with extraordinarily small experimental variation may influence the conclusions of the analysis. The excluded trial was performed at an experimental farm which is known to provide rather homogenous growing conditions. This information is not readily included in the current use of weighting. In the work to come, we will assess the appropriateness of the current application of inverse variance as weights in meta-analysis of field trial data.
Other critical issues that need further investigation include the possible lack of independence between estimates due to shared environments and common component varieties of mixtures
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Random telegraph signals in charge coupled devices
An investigation of fluctuating pixels resulting from proton irradiation of an E2V Technologies CCD47-20 device is presented. The device structure,experimental set up and irradiation methodology are described, followed by a detailed analysis of radiation induced random telegraph signals,RTS. The characteristics of the observed flickering pixels are discussed in detail and the proposed models explaining the mechanism behind the phenomena are viewed in light of the collected data
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