Miracle-dz/UniFAR-FTUs huggingface dataset:
Bandit Forest

To address the contextual bandit problem, we propose an online random forest algorithm. The analysis of the proposed algorithm is based on the sample complexity needed to find the optimal decision stump. Then, the decision stumps are assembled in a random collection of decision trees, Bandit Forest. We show that the proposed algorithm is optimal up to logarithmic factors. The dependence of the sample complexity upon the number of contextual variables is logarithmic. The computational cost of the proposed algorithm with respect to the time horizon is linear. These analytical results allow the proposed algorithm to be efficient in real applications, where the number of events to process is huge, and where we expect that some contextual variables, chosen from a large set, have potentially nonlinear dependencies with the rewards. In the experiments done to illustrate the theoretical analysis, Bandit Forest obtain promising results in comparison with state-of-the-art algorithms.
Block Algorithms with Augmented Rayleigh-Ritz Projections for Large-Scale Eigenpair Computation

Most iterative algorithms for eigenpair computation consist of two main steps: a subspace update (SU) step that generates bases for approximate eigenspaces, followed by a Rayleigh-Ritz (RR) projection step that extracts approximate eigenpairs. So far the predominant methodology for the SU step is based on Krylov subspaces that builds orthonormal bases piece by piece in a sequential manner. In this work, we investigate block methods in the SU step that allow a higher level of concurrency than what is reachable by Krylov subspace methods. To achieve a competitive speed, we propose an augmented Rayleigh-Ritz (ARR) procedure and analyze its rate of convergence under realistic conditions. Combining this ARR procedure with a set of polynomial accelerators, as well as utilizing a few other techniques such as continuation and deflation, we construct a block algorithm designed to reduce the number of RR steps and elevate concurrency in the SU steps. Extensive computational experiments are conducted in Matlab on a representative set of test problems to evaluate the performance of two variants of our algorithm in comparison to two well-established, high-quality eigensolvers ARPACK and FEAST. Numerical results, obtained on a many-core computer without explicit code parallelization, show that when computing a relatively large number of eigenpairs, the performance of our algorithms is competitive with, and frequently superior to, that of the two state-of-the-art eigensolvers.
Hopf automorphisms and twisted extensions

We give some applications of a Hopf algebra constructed from a group acting on another Hopf algebra A as Hopf automorphisms, namely Molnar's smash coproduct Hopf algebra. We find connections between the exponent and Frobenius-Schur indicators of a smash coproduct and the twisted exponents and twisted Frobenius-Schur indicators of the original Hopf algebra A. We study the category of modules of the smash coproduct.
GENERALIZED 2D DELAUNAY MESH REFINEMENT

Delaunay refinement is a popular mesh generation method which makes it possible to derive mathematical guarantees with respect to the quality of the elements. Traditional Delaunay refinement algorithms insert Steiner points in a small enumerable number (one or two) of specific positions inside circumscribed circles of poor quality triangles and on encroached segments. In this paper we prove that there exist entire two-dimensional and one-dimensional regions that can be used for the insertion of Steiner points (innumerable number of choices) while the guarantees on mesh quality can be preserved. This result opens up the possibility to use multiple point placement strategies, all covered by a single proof. In addition, the parallelization of this generalized algorithm immediately implies the parallelization for each individual point placement method.
The M@n@gement journey, spanning boundaries and navigating at the fringe

A few weeks ago, one of the co-authors of this paper received a rejection from an FT listed journal. There is nothing in itself extraordinary in this: we are all used to rejections. The paper did have weaknesses and we could understand why it might have been rejected. What was remarkable about the decision was its concision and the motive presented for it. No justification was given beyond the following sentence: “a primary reason for rejecting the manuscript is that your research explores a unique case, which does not have applicability to many situations”. While the reviewers had picked out some of the other weaknesses of the paper, the main reason for rejection seemed genuinely to be the specificity of the case study (the French context) and the fact that it only examined a single case. What seemed to us an extraordinary opportunity to study this research topic, one that had been recurrently identified by other scholars as important, was seen by the reviewers as lacking possibilities of generalization. Among others, Bent Flyvbjerg (2006) suggests that it is conventional to assume that single case studies cannot be used to inform generalizations and do not therefore contribute significantly to scientific progress. He advocates and emphasizes the usefulness of “black swans” as a supplement or alternative to other methods, while suggesting that “formal generalization is overvalued as a source of scientific development, whereas ‘the force of example’ is underestimated” (Flyvbjerg, 2006, p. 228). This implies that academic journals are aware of this approach and, more widely, of the richness and diversity of research. Of course, we are not (only) telling this story because i
Cómo leer los textos literarios en la era de la cultura digital

Este artigo apresenta um panorama das principais transformacoes do campo literario devido ao surgimento da tecnologia digital e aborda algumas discussoes e teorizacoes sobre leitura de obras literarias nesse novo contexto. As principais transformacoes apresentadas sao a liberdade propiciada pelo ciberespaco para produzir e publicar textos em blogs e sites, a producao e o consumo de literatura na cultura da convergencia, o fenomeno transmidia, a literatura digitalizada e a literatura digital, aplicativos produzidos para aparelhos moveis. Em seguida, apresentam-se algumas das principais concepcoes sobre leitura literaria no universo digital. Sao abordadas inicialmente as discussoes motivadas pela Teoria da Informacao ainda nas decadas de 1950 e 1960, a polarizacao entre uma visao celebratoria e uma visao apocaliptica, a partir da decada de 1990, a concepcao conciliadora de Nancy Katherine Hayles, que propoe um modelo que leve a sinergia entre habilidades mais vinculadas a leitura em suporte impresso (leitura profunda) e outras mais vinculadas a leitura em suporte digital (hiperleitura). Por fim, apos alertar para o perigo do determinismo tecnologico em discussoes polarizadas sobre a leitura no universo digital, o artigo finaliza defendendo a posicao segundo a qual a leitura literaria na era digital requer investimento em multiplos letramentos, destacando-se o letramento literario e o letramento digital.
Strategies for Tomography

Image reconstruction from collected data is an inverse problem that frequently appears in several applications. It is encountered in various research areas, such as biomedical imaging, reconstruction algorithms, image processing, stereology, and mathematical morphology. It turns out that the same methodologies and strategies can be frequently adapted to different frames and disciplines. One of the main tools is the Radon Transform, and its inversion formula which is used, in particular, in many problems of tomographic research where the information is usually acquired by means of data obtained from X-rays projections. Since the 1990s specialistic meetings have been organized devoted to both theoretical advances and practical applications of Tomography. Among them, the Meeting on Tomography and Applications, now in its 6th edition, succeeds in attracting some of the main researchers involved in the various aspects of Tomography. The presentations consists of technical contributions as well as talks outlining the state-ofthe-arts and proposing future research directions. The main purpose of this edition of the meeting was to focus on connections and overlaps among Discrete Tomography, Geometric Tomography, and Computerized Tomography, with a special focus on applications. This special issue consists of invited papers. Some of them have been presented at the 6th Meeting on Tomography and Applications held at Politecnico di Milano on April 26-27, 2012, but in order to provide a better perspective on current research also additional papers were invited. The papers went through a thorough refereeing process and the accepted papers are presented in this issue. The reminder of this preface consists of two parts. In the first part we provide brief overviews for each of the papers from this issue. In the second part we provide summaries for talks presented at the 6th Meeting on Tomography and Applications. In this way the reader can get a better insight into the nature of the meeting and hence also into the current research in the area covered by this special issue.
Ehegattenbesteuerung: Individualbesteuerung mit übertragbarem Grundfreibetrag schafft fiskalische Spielräume

Die Abschaffung des Ehegattensplittings zugunsten einer Individualbesteuerung mit ubertragbarem Grundfreibetrag konnte gut 15 Milliarden Euro Mehreinnahmen erzielen. Das Arbeitsangebot von verheirateten Frauen wurde spurbar steigen. Belastet wurden vor allem besserverdienende Ehepaare mit ungleichen Einkommen. Ubergangregelungen zum Vertrauensschutz fur bestehende Ehen, Ehepaare mit kleineren Kindern oder altere Ehepaare wurden diese Mehrbelastungen mindern, allerdings auch Steuermehreinnahmen und das zusatzliche Arbeitsangebot zunachst reduzieren. Die Steuermehreinnahmen konnen verwendet werden, um private Haushalte zu entlasten. Eine aufkommensneutrale Senkung des Einkommensteuertarifs wurde vor allem ledige Steuerpflichtige entlasten. Eine aufkommensneutrale Verwendung fur Kinderbetreuungseinrichtungen und Schulen wurde vor allem Familien mit Kindern zugutekommen. Belastet wurden nur noch Ehepaare mit hohen Einkommen und hohem Splittingvorteil.
FAULT-TOLERANT MATCHED-FIELD PROCESSING IN THE PRESENCE OF ELEMENT FAILURES

In the highly cluttered undersea environment, sonar array systems require enhanced acoustic signal processing algorithms and sophisticated architectures in order to meet dependability and real-time mission requirements. The probability of hydrophone and processing element failures is very high in such severe operating environments. Adaptive matched-field processing (MFP) algorithms localize sources accurately with moderate levels of signal-to-noise ratio (SNR) and precise knowledge about environments by employing full-wave acoustic propagation models. However, they highly distort output beam patterns with significant increase of sidelobes in the presence of environmental mismatches and element failures. These problems make the development of advanced fault-tolerant signal processing algorithms imperative to tolerate the element failures in cases where replacement of defective elements is impossible or impractical. In this paper, three fault-tolerant MFP algorithms are presented to compensate for the perfo.
THE PETER–WEYL THEOREM FOR CLASSICAL AND QUANTUM slN

as (G,G)-bimodules, and where the sum is over all irreducible representations of G. Let H be a Hopf algebra. If H is finite dimensional, then H∗ is also a Hopf algebra by dualizing all operations from H. We run into issues if H is infinite-dimensional, but we can find a fix. For a finite-dimensional H-module V , an element v ∈ V , and f ∈ V ∗, define a linear functional on H by cf,v(u) = f(uv). Call these linear functionals matrix coefficients. Proposition 0.2. (1) cf,vcg,w = cg⊗f,v⊗w (2) For a representation V , let {e1, . , en} be a basis and {e1, . , en} be a dual basis for V ∗. Then ∆(cf,v) = ∑ i cf,ei ⊗ cei,v (3) H0 has an antipode S = S∗. (4) Suppose φ : V →W is a map of H-modules. Then cf,φv = cφ∗f,v. The algebra of matrix coefficients is the subalgebra H0 of H∗ spanned by all matrix coefficients. Recall that H∗ is an H −H-bimodule as follows. For f ∈ H∗, a, b ∈ H, (a⊗ b)f is the function satisfying: (a⊗ b)f(u) = f(S(a)ub). This equips H0 with a bimodule structure by restriction.
SPATIAL AND SEASONAL DISTRIBUTION OF BIOCLIMATIC INDICES IN THE STATE OF STYRIA AS A BASIS FOR HOLIDAY PLANNING

In the period between 1991. and 2000. , bioclimatic data were collected from 34 meteorological stations in the Austrian State of Styria. The equivalent temperature served as an indicator for the thermal action complex; during the winter months, wind-chill temperatures were used (thermal action complex). Finally, the geographic and seasonal distribution of weatherbiotropic intensity was studied (neurotropic action complex). The mean values and frequency distributions of the equivalent temperature show that with the exception of mid-summer, cool conditions predominate. Comfortable conditions prevail only between June and August, below 500 meters. However, during that period, the heat-stress situations are more noticeable, although they are clearly less frequent than comfortable conditionsThe results for wind-chill temperatures show that during the winter months, up to an altitude of 1500 meters, the extremes of "bitter cold" and ,,very cold" are very infrequent, at least during daylight hours. In the open alpine region, however, cold stress clearly predominates. For the calculation of the weather-biotropy, only 12 stations could be used as there was no air pressure available at the rest of the stations (compare with Figure 1). On the average, biotropic assessments show a predominance of biologically favourable days throughout Styria. No regional differences appear in meteorotropic stimuli, but seasonal differences do exist. Thus, there are clearly more biologically stressed days in the months of winter than in summer, whereas the maximum number of days with favourable biotropic conditions is in summer.
AGENT CONSUMER REPORTS: OF THE AGENTS, BY THE AGENTS, AND FOR THE AGENTS

Service matching is critical in large, dynamic agent systems. While finding exact matches is always desirable as long as an agent knows what it wants, it is not always possible to find exact matches. Moreover, the selected agents (with exact match) may or may not provide quality services. Some agents may be unwilling or unable to advertise their capability information at the sufficient level of details, some might unknowingly advertise inaccurate information, while others might even purposefully provide misleading information. Our proposed solution to this problem is the agent “consumer reports”. The broker agent will not only collect the information advertised by the service provider agents, but also learn about the experiences the consumer agents have about their service providers. It might also hire some agents to test certain service providers to see how well they can do what they claim they are capable of doing. Then agent consumer reports will be built based on the information collected. The advanced level of agent consumer reports will also dynamically capture the probabilistic distribution of the services and use it to assess the probability of a match. We plan to extend LARKS and use it as our agent capability description language.
Higher Bruhat Orders in Type B Contents

Authors Yu. I. Manin and V. V. Schechtman developed the theory of “higher Bruhat orders,” presenting a family of combinatorial objects closely related to the symmetric group. In particular, the two authors define a series of ranked posets which generalize the weak left Bruhat order; their construction has found applications in geometry and representation theory. In this paper, we define a similar combinatorial system for the group Bn of hypercube symmetries. We prove the analogue of Manin and Schechtman’s theorem for the cases k = 1 and k = 2, and relate these orders to the structure of the group Bn. Suggested by Ben Elias
Studies in Econometric Method Economic Measurements for Policy and Prediction

The Cowles Foundation for Research in Economics at Yale Uni'l:et·sity, established as an activity of the Department of Economics in 1955, has as its purpose the conduct and encouragement of research in economics, finance, commet·ce, industry, and technology, including problems of the organization of these activities. The Cowles Foundation seeks to foster the development of logical, mathematical, and statistical methods of analysis for application in economics and t·elated social sciences. The professional research staff are, as a rule, faculty membe1·s with appointments and teaching responsibilities in the Department of Economics and other departments.
Intégration de la fiabilité dans la conception sous contraintes multi-physiques des convertisseurs statiques multicellulaires

Ce papier propose d'integrer la fiabilite previsionnelle dans une approche de pre-dimensionnement de convertisseurs statiques entrelaces pour des applications embarquees automobiles. Cette approche est basee sur une optimisation multi-physique permettant de formaliser le choix d'architecture. Elle integre les contraintes de conception d'une maniere progressive et considere l'aspect fiabilite des composants de puissance. La methode proposee est appliquee a un convertisseur Buck entrelace embarque. Elle permet de pre-dimensionner ce convertisseur en determinant notamment le nombre optimal de cellules sous contraintes: electriques, rendement, thermiques, encombrement et particulierement la fiabilite qui se retrouve au meme niveau que ces dernieres pour eliminer tous les risques de faisabilite des la phase de pre-dimensionnement.
Measuring Multiple Dimensions of Religion and Spirituality for Health Research

Progress in studying the relationship between religion and health has been hampered by the absence of an adequate measure of religiousness and spirituality. This article reports on the conceptual and empirical development of an instrument to measure religiousness and spirituality, intended explicitly for studies of health. It is multidimensional to allow investigation of multiple possible mechanisms of effect, brief enough to be included in clinical or epidemiological surveys, inclusive of both traditional religiousness and noninstitutionally based spirituality, and appropriate for diverse Judeo-Christian populations. The measure may be particularly useful for studies of health in elderly populations in which religious involvement is higher. The measure was tested in the nationally representative 1998 General Social Survey (N = 1,445). Nine dimensions have indices with moderate-to-good internal consistency, and there are three single-item domains. Analysis by age and sex shows that elderly respondents report higher levels of religiousness in virtually every domain of the measure.
Zdolność do prowadzenia pojazdów w chorobach neurozwyrodnieniowych przebiegających z otępieniem

Celem pracy jest omowienie wplywu wybranych chorob neurozwyrodnieniowych przebiegających z otepieniem na zdolnośc do prowadzenia pojazdow. Uwzgledniono takze zalecenia grup eksperckich odnośnie do oceny zdolności do prowadzenia pojazdow przez osoby z chorobami neurozwyrodnieniowymi i metody oceny neuropsychologicznej, ktore mogą byc pomocne w tej ocenie. Prowadzenie samochodu wymaga zaangazowania wielu procesow poznawczych związanych z aktywnością roznych sieci neuronalnych. Wraz z wiekiem zdolnośc do bezpiecznego prowadzenia pojazdow moze sie znacząco obnizyc. Pogorszenie sprawności psychomotorycznej, a takze zaburzenia sensoryczne, choroby przewlekle i przyjmowane leki sprawiają, ze ryzyko uczestnictwa w kolizji drogowej staje sie coraz wyzsze. Z medycznego punktu widzenia szczegolnie niebezpieczne moze sie okazac prowadzenie samochodu przez osoby z postepującymi zaburzeniami poznawczymi. Do chorob neurozwyrodnieniowych wcześnie ograniczających zdolnośc do prowadzenia pojazdow nalezą miedzy innymi: choroba Alzheimera, zwyrodnienie czolowo-skroniowe, otepienie z cialami Lewy’ego i choroba Huntingtona. W chorobie Parkinsona trudności z prowadzeniem pojazdow pojawiają sie zazwyczaj poźniej. Oprocz objawow wynikających z samej choroby, to jest zaburzen poznawczych, emocjonalnych, psychotycznych, ruchowych czy wzrokowych, duze znaczenie mogą miec rowniez dzialania niepoządane stosowanych lekow. Metody oceny zdolności do prowadzenia pojazdow w chorobach ukladu nerwowego są w Polsce slabo rozpowszechnione. W literaturze anglojezycznej proponuje sie ocene kwestionariuszową, przesiewową ocene funkcji poznawczych, szerszą ocene neuropsychologiczną (w tym glownie ocene uwagi, funkcji wzrokowo-przestrzennych i wykonawczych), a takze ocene jazdy chorego, dokonywaną na drodze lub w symulatorze. W artykule przedstawiono wytyczne Amerykanskiej Akademii Neurologii. W Polsce w związku z brakiem precyzyjnych regulacji prawnych dotyczących kierowcow z otepieniem ich ocena i związane z nią dzialania muszą byc dokonywane w sposob zindywidualizowany
BUSINESS PROCESS MINING USING ITERATED LOCAL SEARCH

This paper introduces ILS Miner, a novel method for discovering process models from event logs using iterated local search. A comparison between ILS Miner, GLS Miner and HeuristicMiner is presented in this paper. GLS Miner was chosen because applies Guided Local Search for discovering process models from event logs, HeuristicMiner[10] being a legacy method in business process discovery. It is shown that ILS Miner can discover process models that correctly map to the event log. ILS Miner works with business processes represented as graphs, and the final discovered process is represented as a BPMN diagram.
AN INTRODUCTION TO THE THEORY OF FIELD EXTENSIONS

Assuming some basic knowledge of groups, rings, and fields, the following investigation will introduce the reader to the theory of rings before proceeding to elaborate, in greater depth, on the theory of field extensions. Finally, a few consequences of the subject will be examined by solving classical straightedge and compass problems in a manner that effectively utilizes the material.
Modulares Konzept zur produktgruppenübergreifenden Prüfplanung

Kurzfassung Um die Qualität von Produkten zu gewährleisten, sind Qualitätsprüfungen im Produktentstehungsprozess unabdingbar [1]. Die Prüfplanung schafft die technischen und organisatorischen Voraussetzungen für eine effiziente Durchführung der Qualitätsprüfungen [2]. Zur Erstellung eines abgestimmten Prüfplans ist neben den Qualitätsforderungen eine genaue Kenntnis des Produkts und des Produktentstehungsprozesses erforderlich. Die VDI/VDE/DGQ-Richtlinie 2619 stellt eine Vorgehensweise zur Prüfplanerstellung vor, die den Anspruch erhebt, allgemein und produktgruppenübergreifend gültig zu sein. Verschiedene Produktgruppen werden allerdings auf unterschiedliche Art produziert und geprüft. Die produktgruppenspezifischen Gegebenheiten müssen bei der Erstellung des Prüfplans berücksichtigt werden. Es bedarf daher einer produktgruppenspezifischen Analyse der Prüfplanung. Der vorliegende Beitrag stellt ein modulares Konzept zur Prüfplanerstellung für die Produktgruppen „mechanische Bauteile“, „elektronische Baugruppen“ und „Software“ vor.