478 research outputs found

    Integration Platform as a Service

    Get PDF
    Erworben im Rahmen der Schweizer Nationallizenzen (http://www.nationallizenzen.ch)Around 2000, the term “enterprise application integration” (EAI) became popular with IT departments. Until then, silo applications – custom-developed or packaged, host- or client-server-based – had been connected with numerous point-to-point interfaces. The resulting complexity of the application landscape affected the implementation of additional business requirements such as electronic marketplaces, e-commerce, and supply chain management. Commonly used middleware techniques such as message queues, object request brokers, or remote procedure calls required significant and costly alterations of source and target systems

    How Are Communication Channels on GitHub Presented to Their Intended Audience? -- A Thematic Analysis

    Full text link
    Communication is essential in software development, and even more in distributed settings. Communication activities need to be organized and coordinated to defend against the threat of productivity losses, increases in cognitive load, and stress among team members. With a plethora of communication channels that were identified by previous research in open-source projects, there is a need to explore organizational issues in how these communication channels are introduced, explained, and motivated for use among all project members. In this study, we wanted to understand which communication channels are used in GitHub projects and how they are presented to the GitHub project audience. We employed thematic analysis to analyze 151 artifacts in 90 GitHub projects. Our results revealed 32 unique communications channels that can be divided into nine different types. Projects mostly provide channels of different types, but for some types (e.g., chat) it is common to provide several channels. Maintainers are aware that channels have different properties and help the developers to decide which channel should be used in which case. However, this is not true for all projects, and often we have not found any explicit reasons why maintainers chose to provide one channel over another. Different channels can be used for different purposes and have different affordances, so maintainers have to decide wisely which channels they want to provide and make clear which channel should be used in which case. Otherwise, developers might feel overwhelmed of too many channels and information can get fragmented over multiple channels.Comment: 10 pages, 5 figures. Accepted for presentation at the International Conference on Evaluation and Assessment in Software Engineering (EASE) 202

    Exploiting jet binning to identify the initial state of high-mass resonances

    Get PDF
    If a new high-mass resonance is discovered at the Large Hadron Collider, model-independent techniques to identify the production mechanism will be crucial to understand its nature and effective couplings to Standard Model particles. We present a powerful and model-independent method to infer the initial state in the production of any high-mass color-singlet system by using a tight veto on accompanying hadronic jets to divide the data into two mutually exclusive event samples (jet bins). For a resonance of several hundred GeV, the jet binning cut needed to discriminate quark and gluon initial states is in the experimentally accessible range of several tens of GeV. It also yields comparable cross sections for both bins, making this method viable already with the small event samples available shortly after a discovery. Theoretically, the method is made feasible by utilizing an effective field theory setup to compute the jet cut dependence precisely and model independently and to systematically control all sources of theoretical uncertainties in the jet binning, as well as their correlations. We use a 750 GeV scalar resonance as an example to demonstrate the viability of our method.Comment: 6 pages, 2 figures, v2: journal versio

    Physics informed Neural Networks applied to the description of wave-particle resonance in kinetic simulations of fusion plasmas

    Full text link
    The Vlasov-Poisson system is employed in its reduced form version (1D1V) as a test bed for the applicability of Physics Informed Neural Network (PINN) to the wave-particle resonance. Two examples are explored: the Landau damping and the bump-on-tail instability. PINN is first tested as a compression method for the solution of the Vlasov-Poisson system and compared to the standard neural networks. Second, the application of PINN to solving the Vlasov-Poisson system is also presented with the special emphasis on the integral part, which motivates the implementation of a PINN variant, called Integrable PINN (I-PINN), based on the automatic-differentiation to solve the partial differential equation and on the automatic-integration to solve the integral equation

    Free Indirect Discourse Meets Character Viewpoint Gestures

    Get PDF
    Contribution to Linguistic Evidence 202

    Vielfältig statt ideal: Arbeitspsychologisches Feldexperiment zur Gestaltung von Nutzerarbeitsplätzen in einer Universitätsbibliothek

    Get PDF
    Der vorliegende Aufsatz stellt ein arbeitspsychologisches Feldexperiment zur Untersuchung von vier verschiedenen Nutzerarbeitsplatzqualitäten innerhalb der Publikumsfläche der Universitätsbibliothek der Otto-von-Guericke-Universität Magdeburg anhand der subjektiv beurteilten Lernumgebung durch Studierende dar und wurde von der Universitätsbibliothek mit dem Ziel in Auftrag gegeben, mögliche Ansatzpunkte für eine nutzendenorientierte Optimierung der Arbeitsplätze abzuleiten. In Anlehnung an vergleichbare Studien in anderen Universitätsbibliotheken wurde die Wahrnehmung der Lernumgebung und die Beurteilung der Nutzerarbeitsplätze mittels eigens für diese Untersuchung erstellten Fragebögen sowie standardisierten Interviews erhoben. Außerdem wurde ein mobiles Eye-Tracking-System zur Analyse potentieller Ablenkungsfaktoren in der Lernumgebung genutzt. Die Ergebnisse weisen darauf hin, dass sich die wahrgenommenen Eigenschaften der Lernumgebung auf das Wohlbefinden der Studierenden auswirken, welches wiederum die Wahl ihres Arbeitsplatzes beeinflusst. Basierend auf der Interpretation der gewonnenen Erkenntnisse und unter Berücksich-tigung möglicher Kritikpunkte am Studiendesign zeigen die Daten Evidenz dafür, dass die Helligkeit, die ergonomische Ausstattung, ein freies Sichtfeld sowie die Lautstärke wichtige Einflussfaktoren für das Wohlbefinden der Studierenden darstellen, wobei auch die individuellen Lernpräferenzen dazu führen, dass Nutzende unterschiedliche Plätze favorisieren. Den idealen Nutzerarbeitsplatz gibt es demnach nicht. Die Aufgabe einer Universitätsbibliothek sollte daher u. a. darin bestehen, den Studierenden eine möglichst vielfältige Auswahl an Arbeitsplätzen zur Verfügung zu stellen.This paper presents a psychological study, which examined four different work spaces in the university library of the Otto-von-Guericke-University Magdeburg based on the learning environment evaluated by students. The study was commissioned by the library with the aim to identify important factors in designing a learning environment, which fits the students` needs. Based on similar studies conducted in other university libraries the environmental perception and the evaluation of the workspaces were examined with questionnaires and standardised interviews. A mobile eye-tracking system was used to analyse potential distractors around the spaces. The results show that the perceived features of the learning environment have an impact on the wellbeing of the students, which in turn influences the choice of their favourite learning space. Based on the interpretation of these findings and taking into account possible limitations of the study design the data indicate that light, ergonomic features and the visibility of the whole room as well as noise have an important influence on the wellbeing of students. However, because of individual learning preferences, users prefer different learning spaces. Therefore there cannot be the perfect learning space. The results indicate that university libraries should focus on providing a diverse choice of learning spaces

    Skew scattering in dilute ferromagnetic alloys

    Get PDF
    The challenging problem of skew scattering for Hall effects in dilute ferromagnetic alloys, with intertwined effects of spin-orbit coupling, magnetism and impurity scattering, is studied here from first principles. Our main aim is to identify chemical trends and work out simple rules for large skew scattering in terms of the impurity and host states at the Fermi surface, with particular emphasis on the interplay of the spin and anomalous Hall effects in one and the same system. The predicted trends are benchmarked by referring to three different \emph{ab initio} methods based on different approximations with respect to the electronic structure and transport properties.Comment: 5 pages, 4 figure

    Experimental determination of isotope enrichment factors – bias from mass removal by repetitive sampling

    Get PDF
    Application of compound-specific stable isotope approaches often involves comparisons of isotope enrichment factors (ε). Experimental determination of ε-values is based on the Rayleigh equation, which relates the change in measured isotope ratios to the decreasing substrate fractions and is valid for closed systems. Even in well-controlled batch experiments, however, this requirement is not necessarily fulfilled, since repetitive sampling can remove a significant fraction of the analyte. For volatile compounds the need for appropriate corrections is most evident, and various methods have been proposed to account for mass removal and for volatilization into the headspace. In this study we use both synthetic and experimental data to demonstrate that the determination of ε-values according to current correction methods is prone to considerable systematic errors even in well-designed experimental setups. Application of inappropriate methods may lead to incorrect and inconsistent ε-values entailing misinterpretations regarding the processes underlying isotope fractionation. In fact, our results suggest that artifacts arising from inappropriate data evaluation might contribute to the variability of published ε-values. In response, we present novel, adequate methods to eliminate systematic errors in data evaluation. A model-based sensitivity analysis serves to reveal the most crucial experimental parameters and can be used for future experimental design to obtain correct ε-values allowing mechanistic interpretations

    The Glarus thrust: excursion guide and report of a field trip of the Swiss Tectonic Studies Group (Swiss Geological Society, 14.-16. 09. 2006)

    Get PDF
    Participants: Ansorge Jörg (ETHZ) den Brok Bas (EAWAG-EMPA) Dèzes Pierre (SANW) Gonzalez Laura (University of Bern) Herwegh Marco (University of Bern) Hürzeler Jean-Pierre (University of Basel) Imper David (GeoPark) Mancktelow Neil (ETHZ) Mullis Josef (University of Basel) Nyffenegger Franziska (Fachhochschule Burgdorf, University of Bern) Pfiffner Adrian (University of Bern) Schreurs Guido (University of Bern) Schmalholz Stefan (ETHZ) Schmid Stefan (University of Basel) Wiederkehr Michael (University of Basel) Wilson Christopher (Melbourne University) Wilson Lilian (Melbourne University
    • …
    corecore