478 research outputs found
Integration Platform as a Service
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
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
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
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
Contribution to Linguistic Evidence 202
Vielfältig statt ideal: Arbeitspsychologisches Feldexperiment zur Gestaltung von Nutzerarbeitsplätzen in einer Universitätsbibliothek
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
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
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)
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
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