1,721,261 research outputs found
Replikationsdaten für: Excess Mortality in Austria during the COVID-19 Pandemic
No full textThis dataset is provided to replicate the correlation results from
M. Reitzner: Excess Mortality in Austria during the COVID-19 Pandemic
The impact of the COVID-19 pandemic on the mortality in Austria is investigated. Excess mortality for Austria and all Austrian federal states in the years 2020 to 2023 is computed. The results are discussed against some COVID-19 specific quantities, yielding correlations of excess mortality with COVID-19 infections, COVID-19 deaths and vaccination rates
Sterblichkeit einschätzen
No full textSalle A, Reitzner M. Sterblichkeit einschätzen. mathematik lehren. 2022;(234):29–35
Anticipative measurements in hybrid quantum-classical computation
No full textBefore the availability of large scale fault-tolerant quantum devices, one
has to find ways to make the most of current noisy intermediate-scale quantum
devices. One possibility is to seek smaller repetitive hybrid quantum-classical
tasks with higher fidelity, rather than directly pursuing large complex tasks.
We present an approach in this direction where the quantum computation is
supplemented by a classical result. While the presence of the supplementary
classical information helps alone, taking advantage of its anticipation also
leads to a new type of quantum measurements, which we call anticipative.
Anticipative quantum measurements lead to improved success rate over cases
where we would use quantum measurements optimized without assuming the later
arriving supplementing information. Importantly, in an anticipative quantum
measurement the combination of the results from classical and quantum
computations happens only in the end, without the need for feedback from the
one to the other computation, a feature which hence allows for running both
computations in parallel. We demonstrate the method with an experiment using an
IBMQ device and show that it leads to an improved success rate even in a real
noisy setting
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Variational Analysis of Poisson Processes
No full text© 2016 Springer International Publishing Switzerland.The expected value of a functional F(η) of a Poisson process η can be considered as a function of its intensity measure μ. The paper surveys several results concerning differentiability properties of this functional on the space of signed measures with finite total variation. Then, necessary conditions for μ being a local minima of the considered functional are elaborated taking into account possible constraints on μ, most importantly the case of μ with given total mass a. These necessary conditions can be phrased by requiring that the gradient of the functional (being the expected first difference) is constant on the support of μ. In many important cases, the gradient depends only on the local structure of μ in a neighbourhood of x and so it is possible to work out the asymptotics of the minimising measure with the total mass a growing to infinity. Examples include the optimal approximation of convex functions, clustering problem and optimal search. In non-asymptotic cases, it is in general possible to find the optimal measure using steepest descent algorithms which are based on the obtained explicit form of the gradient
Variations on the Author
No full text“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
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Quantum Incompatibility in Collective Measurements
No full textWe study the compatibility (or joint measurability) of quantum observables in a setting where the experimenter has access to multiple copies of a given quantum system, rather than performing the experiments on each individual copy separately. We introduce the index of incompatibility as a quantifier of incompatibility in this multi-copy setting, as well as the notion of the compatibility stack representing various compatibility relations present in a given set of observables. We then prove a general structure theorem for multi-copy joint observables and use it to prove that all abstract compatibility stacks with three vertices have realizations in terms of quantum observables
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