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Kaum ein Name ist so eng mit dem "Projekt HSAKA" verbunden wie der von Wolf Aßmus: Seit der ersten Hessischen Schülerakademie für die Oberstufe im Jahre 2004 ist er als Leiter des Physik-Kurses dabei; die Gründung der Mittelstufenakademie 2011 wurde von ihm tatkräftig unterstützt und gefördert; einen Sitz im Kuratorium hat er ebenso übernommen wie das Amt des Ersten Vorsitzenden des Trägervereins von Burg Fürsteneck – der inzwischen pensionierte Professor für Festkörperphysik verkörpert geradezu die Idee vom "Un-Ruhestand". Wer mag es ihm da verübeln, wenn Wolf beschließt, im nächsten Sommer mal mehr Zeit mit seinen Enkeln zu verbringen, statt auf die Burg zu fahren? Weil es daher 2020 zum ersten Mal eine Oberstufenakademie ohne Wolf und ohne Physik-Kurs geben wird (stattdessen Philosophie und Informatik), haben wir auf der vergangenen Akademie die Gelegenheit genutzt, Wolf für 15 Jahre Schülerakademie zu danken. Genauer gesagt: für 15 Jahre, 16 Fachkurse in Physik (15 auf der Oberstufenakademie und einer bei der Mittelstufe), 15 kursübergreifende Naturkunde-Angebote, für die Betreuung Dutzender Studierender und weit über 200 Schüler*innen, für unzählige gemeinsame Aha-Erlebnisse und humorvolle Geschichten, für unermüdliches Engagement und geduldigen Beistand – und nicht zuletzt für viele, viele Liter Speiseeis. Unsere Dankbarkeit wollen wir hier mit allen Leser*innen dieser Dokumentation teilen.
Wir konnten unseren eigenen Weg gehen, jeder von uns hatte am Ende ein anderes Ergebnis und es war keines falsch. Das macht für mich die Qualität beim Lernen aus, dass mir genug Platz für meine Gedanken gegeben wird und ich ernst genommen werde. […] Dieses Gefühl ist bis heute nicht verloren gegangen und der Gedanke, wie es sein könnte, hilft mir, aus mir raus zukommen und andere zu motivieren, das ebenfalls zu tun, um auch um mich herum anregende Gespräche zu führen, die an die während der Akademie geführten heranreichen. (Feedback einer Teilnehmerin der HSAKA-M 2018)
Bildung durch Wissenschaft im Sinne des Forschenden Lernens ist ein zentrales Thema schulischer Bildung und findet beispielsweise im Konzept Kultur.Forscher! eine didaktische, schulische Umsetzung und wird vom Wissenschaftsrat als Leitgedanke ebenfalls für Universitäten mit dem Ziel empfohlen, Studium und Lehre deutlicher an der Forschung auszurichten.
In November 2016, magnetotelluric (MT) data were collected at the Ceboruco Volcano in cooperation with the Centro de Sismología y Volcanología de Occidente (SisVoc, Universidad de Guadalajara, Mexico). The Ceboruco is a 2280 m high stratovolcano, located in Nayarit State, Mexico. It is placed in the central part of the Tepic-Zacoalco Rift (TZR), which constitutes the north-western end of the Trans-Mexican Volcanic Belt. Together with Chapala and Colima (in the Jalisco Block), they form the triple rift system developed as a consequence of the ongoing subduction of the Rivera and Cocos oceanic plates beneath the North American continental crust. Although its last eruption occurred in 1870, it is the most active volcano in the area, showing volcanic-earthquake activity together with ongoing vapor emissions. The survey was part of a geothermal project (CeMIEGeo-P24) and focused on the determination of electrical conductivity properties to characterize the deep structure and the geothermal potential of the Volcano. Frequency dependent magnetotelluric response functions were calculated from 25 broadband MT stations, which covered an area of 10 x 10 km2 including its crater, calderas and foreland. The results were interpreted using anisotropic 3-D forward modelling and isotropic 3-D inversion approaches, considering strong topographical effects. The final resistivity model implies a highly conductive layer, reaching from near-surface to approximately 2 km depth, which might be related to a hydrothermal system. Here, mineralized fluids and clay minerals can cause high conductivities around 1 S/m. For longer periods, the principal axes of the MT response tensors (phase tensor, apparent resistivity tensor) are in good agreement with the strike direction of the underlying rift system. However, they are not rendered by the isotropic inversion. Thus the data suggest an anisotropic electrical conductivity at greater depth with its principal axis determined by the response tensors.
We investigate the well-known vector state ψ(4040) in the frame-work of a quantum field theoretical model. In particular, we study its spectral function and search for the pole(s) in the complex plane. Quite interestingly, the spectral function has a non-standard shape and two poles are present. The role of the meson-meson quantum loops (in particular DD* ones) is crucial and could also explain the not yet conformed “state” Y(4008).
Since the last 20 years, modern heuristic algorithms and machine learning have been increasingly used for several purposes in accelerator technology and physics. Since computing power has become less and less of a limiting factor, these tools have become part of the physicist community's standard toolkit [1][2] [3] [4] [5]. This paper describes the construction of an algorithm that can be used to generate an optimised lattice design for transfer lines under the consideration of restrictions that usually limit design options in reality. The developed algorithm has been applied to the existing SIS18 to HADES transfer line in GSI.
Gapping in Japanese, which is an SOV language, differs from gapping in SVO languages in that the conjuncts with the elided verbs appear in non-final position. In this paper I present an incremental approach to gapping in Japanese, where it is assumed that an argument structure type is constructed in the non-final clause(s) in the gapping construction. This type is unified with the construction type created by the final clause resulting in identical construction types for all conjuncts in the construction.
This paper presents a formalization of proportional analogy using typed feature structures, which retains all key elements of analogical models of morphology. With the Kasem number system as an example, I show that using this model it is possible to express partial analogies which are unified into complete analogies. The analysis presented is accompanied by a complete TRALE implementation.
The present study focuses on the beam line optimization from the heavy-ion synchrotron SIS18 to the HADES experiment. BOBYQA (Bound Optimization BY Quadratic Approximation) solves bound constrained optimization problems without using derivatives of the objective function. The Bayesian optimization is another strategy for global optimization of costly, noisy functions without using derivatives. A python programming interface to MADX allow the use of the python implementation of BOBYQA and Bayesian method. This gave the possibility to use tracking simulation with MADX to determine the loss budget for each lattice setting during the optimization and compare both optimization methods.
The Specialized Information Service Biodiversity Research (BIOfid) has been launched to mobilize valuable biological data from printed literature hidden in German libraries for over the past 250 years. In this project, we annotate German texts converted by OCR from historical scientific literature on the biodiversity of plants, birds, moths and butterflies. Our work enables the automatic extraction of biological information previously buried in the mass of papers and volumes. For this purpose, we generated training data for the tasks of Named Entity Recognition (NER) and Taxa Recognition (TR) in biological documents. We use this data to train a number of leading machine learning tools and create a gold standard for TR in biodiversity literature. More specifically, we perform a practical analysis of our newly generated BIOfid dataset through various downstream-task evaluations and establish a new state of the art for TR with 80.23% F-score. In this sense, our paper lays the foundations for future work in the field of information extraction in biology texts.
b̄b̄ud tetraquark resonances in the Born-Oppenheimer approximation using lattice QCD potentials
(2019)
We study tetraquark resonances for a pair of static antiquarks b¯b¯ in presence of two light quarks ud based on lattice QCD potentials. The system is treated in the Born-Oppenheimer approximation and we use the emergent wave method. We focus on the isospin I = 0 channel but take different angular momenta l of the heavy antiquarks b¯b¯ into account. Further calculations have already predicted a bound state for the l = 0 case with quantum numbers I(JP) = 0(1+). Performing computations for several angular momenta, we extract the phase shifts and search for T and S matrix poles in the second Riemann sheet. For angular momentum l = 1, we predict a tetraquark resonance with quantum numbers I(JP) = 0(1−), resonance mass m = 10576+4−4 MeV and decay width Γ = 112+90−103 MeV, which decays into two B mesons.