bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of Shear Connection and End Supports onto Self-vibrations of Cold-Formed Steel Concrete Composite Floor
Authors: Rajić Andrea , Lukačević Ivan , Ćurković Ivan , Žuvelek Vlaho 
Published: May 2024

AbstractCold-formed steel composite floors are lightweight systems whose application increased in the last few decades. According to the design guidelines, the frequency of floor systems should be more than 4 Hz while in the case of light steel floors, the natural frequency of the system should be in the high frequency range above 8 Hz. The main focus of this paper is to investigate the vibration performance of an innovative lightweight composite floor system called LWT-FLOOR. The LWT-FLOOR system is composed of spot-welded built-up cold-formed steel elements that are connected to a lightweight concrete slab. Based on laboratory tests material properties of all components of the system are obtained and the finite element model of cold-formed steel concrete composite floor is created to investigate its vibration behaviour. Numerical analyses were conducted in Abaqus/CAE, where after mesh density verification, the influence of the degree of shear connection, spot weld density, concrete type and class, steel channels cross-section thickness and the arrangement and diameter of the shear connector were analysed. The results show that the flexural rigidity of the system and vibration characteristics can be improved by changing those parameters, especially by changing steel channel cross-section characteristics and support conditions from nominally pinned to nominally rigid.
Excitations and Resonances: Misinterpreted Actions in Neon Meditations
Authors: Holopainen Risto 
Published: May 2024

AbstractNeon Meditations is a collaborative performance work combining visual art and music, where colours are translated into sound in an electronic instrument controlled by two performers. The sound design follows the principle of excitation and resonance. We use exciters attached to resonating objects that colour and distort the sound. The mapping from gesture to sound, and the fact that this is a multi-agent system, tends to cause confusion about the way the performers shape the sound. Godøy's concept of sound–motion objects is well adapted to acoustic instrumental music, but using Neon Meditations as an example, we will see that it faces many challenges when one tries to extend its application to live electronic music.
Exploring the Electroacoustic Music History Through Interactive Sonic Design
Authors: Christodoulou Anna-Maria 
Published: May 2024

AbstractAlgorithms and related technologies are widely used for many musicology-related tasks, such as music analysis or even music composition. The use of algorithms in music analysis may be crucial for a deeper understanding of music theory and history, yet experiential knowledge is proposed here as a more interactive way to take a journey through music history and, more specifically, the evolution of electroacoustic music. From acousmatic music to serialism and from Musique Concrète and Elektronische music to Post-Schaefferian Electronica, numerous techniques have been developed for sound generation and manipulation. In this chapter, SuperCollider is used as a tool to create an interactive composition and to provide a walkthrough of electroacoustic music through live coding. The musicological aspects of the different composition techniques of this music style are explored through their integration into the algorithmic composition.
Prelude to a Theory of Gestural Time, Proto-Geometry, and Music
Authors: Stover Chris 
Published: May 2024

AbstractThis chapter draws on prompts from Rolf Inge Godøy, Edmund Husserl, and a range of Indigenous, queer, and decolonial phenomenological thinkers to frame a theory of gestural time for music that rethinks the relationship between experience and perception. It plays with the distinction between Husserl’s “exact” and “descriptive” sciences, putting the latter to work as a productive foil to the drive for empirical exactitude that animates much perception and cognition theory. It does so not to replace exactitude, but to enrich the experiential nexus. Gesture emerges as an at least equally (and perhaps more) plausible first principle for reunderstanding the mechanisms by which perception functions. Focusing on a debate on categorical identity between Rainer Polak and Justin London, it considers the possibility that a turn to affect—understood in Baruch Spinoza’s sense of a pre-personal flow of force relations that condition the very possibility of experience and perception in the first place—can work to elide certain kinds of experimental cleavings to a priori category distinctions and to at least provisionally displace perceptual exactitude as the primary location for understanding musical experience.
Different Attitudes of Expressive Movement Awareness in Professional Musicians
Authors: Minafra Annamaria 
Published: May 2024

AbstractThis chapter explores professional musicians’ awareness of expressive bodily movements, referring to Godøy’s concept of sound-action awareness in music. Three professional musicians (a pianist, a violinist, and a guitarist) performed three tasks, each corresponding to a phenomenological reduction. Data were collected using a phenomenological approach through semi-structured interviews, observations, and audiovisual recordings. The analysis revealed three different attitudes to expressive movement awareness. The pianist showed theatrically unsynchronised expressive movements, with her musical intentions remaining at a level of pre-reflective self-awareness, perhaps due to her lack of introspective competence. The violinist became aware of his body parts involved in playing but was unaware of his performed expressive movements. The guitarist gradually reduced the expressive movements to achieve optimal performance. This study may encourage expert musicians to explore new practising procedures by developing body self-awareness. Self-reflecting on movement and its kinaesthetic feedback may contribute to achieving sound-action awareness in music, positively affecting musicians’ performance and enabling them to self-correct inappropriate postures.
Studying Performances with Digital Musical Instruments: A Case Study of Ritual, a Piece for Solo Karlax
Authors: Lavastre Benjamin , Wanderley Marcelo M. 
Published: May 2024

AbstractThis chapter discusses ways to study sonic design from the perspective of musical performances with Digital Musical Instruments (DMIs). We first review the specificities of DMIs in terms of their unique affordances and limitations and comment on instrument availability, longevity, and stability issues, which impact the use of DMIs in musical practice. We then focus on the Karlax, a commercial device used in several musical performances for over a decade. We present an analysis of excerpts from three performances of D. Andrew Stewart’s piece Ritual for solo Karlax, discussing the variability of performers’ gestures and the musical choices made. We conclude by suggesting practice exercises to develop performance techniques with the Karlax and discussing musical composition and performance issues with DMIs.
Social Learning – Innovative Zusammenarbeit im digitalen Zeitalter gestalten mit der Methode Working Out Loud
Authors: Oelker Birgit , Meißner Anne 
Published: May 2024

ZusammenfassungDer Beitrag stellt ein didaktisches Konzept für die Hochschullehre vor, bei dem selbstgesteuertes Lernen in Netzwerken und Kollaboration in besonderer Weise gefördert wird. Das Format hat sich in Evaluationen als äußerst positiv für das Lernen in Gruppen und die persönliche Entwicklung erwiesen. Es leistet einen wichtigen Beitrag zu einer neuen Lernkultur in der modernen und digitalen Hochschullehre. In diesem digitalen Lehrkonzept wurde das Format Working Out Loud (WOL) auf die Hochschullehre übertragen. Studierende arbeiten in Online-Teams, bauen Netzwerke auf und unterstützen sich als Peers. Der begleitete, kompetenzorientierte Selbstlernprozess führt zu intensiven Kommunikations-/Reflexionsprozessen und zeigt Studierenden für ihre Lern- und Arbeitsmethoden zukunftsweisende Formate auf.
Online Educational Escape Rooms – Ein Fallbeispiel
Authors: Hörsch Hella , von Korflesch Harald F. O. , Krath Jeanine , Köhler Jessica 
Published: May 2024

ZusammenfassungAufgrund der Covid-19-Pandemie haben virtuelle Lernformate an Bedeutung gewonnen. Insbesondere in der Hochschullehre werden innovative Methoden gesucht, um die Motivation und interaktive Einbindung von Student:innen zu fördern. In diesem Beitrag wird eine Fallstudie zu einem edukativen Online Escape Room an der Universität Koblenz-Landau vorgestellt. Das Masterseminar „Management und Führung“ mit N = 18 Student:innen und der Webdienst „Gather“ dienten als Basis. Mittels eines Mixed-Methods Ansatzes wurde evaluiert, ob der Lernerfolg, die intrinsische Motivation und die Kollaboration der Student:innen durch den Einsatz des Escape Rooms gesteigert werden konnte und wie die UX bewertet wurde. Neben den Ergebnissen werden Limitationen sowie Implikationen für die Hochschullehre diskutiert.
Das digitale Feedback-Portfolio
Authors: Laube Sebastian , Ohl Franziska , Harring Marius , Imhof Margarete 
Published: May 2024

ZusammenfassungDas digitale Feedback-Portfolio unterstützt Studierende Verbindungslinien zwischen einzelnen Inhalten im Lehramtsstudium zu ziehen und diese nachhaltig zu verarbeiten. Um den Stand der Fähigkeiten und des Wissens sichtbar zu machen, werden Reflexionsprozesse innerhalb von Lehrveranstaltungen mithilfe von unterschiedlichen Aufgaben angestoßen, die von Studierenden im Rahmen von Portfolioeinträgen bearbeitet werden. Reflexion erfolgt dabei u. a. mittels Feedbackschleifen auf vier Ebenen: Feedback geben, Feedback nehmen, Feedback erfragen und Feedback verarbeiten.
Welche Chancen bietet der Einsatz von interaktiven Unterrichtsvideos in der Lehrer:innenbildung aus Studierendensicht?
Authors: Zmiskol Tabea , Hess Miriam 
Published: May 2024

ZusammenfassungDem Einsatz von Unterrichtsvideos wird in der Lehrer:innenbildung grundsätzlich ein hohes Lernpotenzial zugesprochen, wobei groß angelegte Studien zur Frage, welcher Einsatz wie effektiv ist, noch ausstehen. Dieser Beitrag beschäftigt sich daher damit, wie Studierende die Arbeit mit interaktiven Unterrichtsvideos im Vergleich zu einer offenen, einer hoch und einer niedrig inferenten Beobachtungsmethode einschätzen. Im Rahmen eines Online-Seminars wurde die begründete Einschätzung von 103 Studierenden des Grundschullehramts erhoben. Die Ergebnisse legen nahe, dass aus Studierendensicht die interaktive Videoanalyse von den vier Beobachtungsmethoden am besten dafür geeignet ist, bei Studierenden die professionelle Wahrnehmung zu schulen. Inwiefern ein tatsächlicher Kompetenzzuwachs vorliegt, gilt es in weiteren Analysen zu überprüfen.
Systematische Optimierung der digitalen Videoanalyseplattform ViviAn für die Lehrkräftebildung – Ein Design-Based Research Ansatz
Authors: Rieger Marc Bastian , Scherb Christian Alexander , Roth Jürgen 
Published: May 2024

ZusammenfassungViviAn (Videovignetten zur Analyse von Unterrichtsprozessen) ist eine Online-Lernplattform, die an vielen Standorten im deutschsprachigen Raum in der Lehrkräftebildung an Hochschulen und darüber hinaus (etwa in Studienseminaren) eingesetzt wird. ViviAn wird im Rahmen eines Forschungsprojekts im Design-Based Research Ansatz systematisch weiterentwickelt, um die Plattform dauerhaft an Bedürfnisse der Nutzer:innen sowie an technische Entwicklungen angepasst zu halten. Ein weiteres explizites Ziel besteht darin, die Feedbackoptionen innerhalb von ViviAn weiter zu elaborieren. In diesem Beitrag werden das Gesamtprojekt sowie ausgewählte Ergebnisse erster Mikrozyklen vorgestellt. Durch die Realisierung einer prozessbegleitenden Usability-Evaluation konnte bereits eine notwendige Anpassung an mobile Endgeräte identifiziert werden.
Pädagogik lost in Code
Authors: Dobmeier Florian 
Published: May 2024

ZusammenfassungDer Beitrag argumentiert, dass die Handlungspraxis der Lehre operativ als idealtypische Form pädagogischer Zeigestruktur zu fassen ist. Im präsenzlosen Digitalsolipsismus an Universitäten während der coronapolitischen Schließungen kippte Lehre in operative Fehlformen des Lehrens. Diese Fehlformen sind keinesfalls harmlos, sondern zeitigen erheblich ungleichheitswirksame Effekte für Bildungsbiographien; ungleiche Lernvoraussetzungen werden erzeugt bzw. bereits vorhandene Differenzen im Chancengefüge verstärkt statt kompensiert. Dies bedeutet letztlich eine fatale pädagogische Regression in feudal-privatistische, neoliberalisierte Lehr-Lern-Verhältnisse, die aus ungleichheits-, vulnerabilitäts- und bildungsgerechtigkeitstheoretischer Überlegung aufs Schärfste zu verurteilen ist und künftig mit aller Kraft vereitelt werden muss.
Von der Toolisierung zur Enkulturation der Digitälität
Authors: Ruge Wolfgang B. , Schwaiger Silke 
Published: May 2024

ZusammenfassungIm Zuge aktueller gesellschaftlicher Veränderungen stehen Hochschulen und Universitäten vor der Aufgabe, eine neue Lernkultur zu entwickeln. Hierbei spielt die zunehmende Digitalisierung des Lehrens und Lernens eine wesentliche Rolle. Im vorliegenden Beitrag entwickeln wir die These, dass eine Reduktion mediendidaktischen Handelns auf den kompetenten Einsatz von Tools noch nicht zu der anvisierten neuen Lernkultur führt und pädagogisch problematisch ist. Daran anschließend wird am Beispiel des geförderten Projekts „Writing Lab @FHWien der WKW“ skizziert, wie wir an der eigenen Hochschule eine neue Lernkultur mitgestalten möchten.
Precise tests of the axion coupling to tops
Authors: Phan A. V. , Westhoff S. 
Published: May 2024

Abstract
We present an in-depth analysis of axions and axion-like particles in top-pair production at the LHC. Our main goal is to probe the axion coupling to top quarks at high energies. To this end, we calculate the top-antitop cross section and differential distributions including ALP effects up to one-loop level. By comparing these predictions with LHC precision measurements, we constrain the top coupling of axion-like particles with masses below the top-antitop threshold. Our results apply to all UV completions of the ALP effective theory with dominant couplings to top quarks, in particular to DFSZ-like axion models.
A model of pseudo-Nambu-Goldstone dark matter with two complex scalars
Authors: Abe Tomohiro , Hamada Yu , Tsumura Koji 
Published: May 2024

Abstract
Pseudo-Nambu-Goldstone (pNG) dark matter (DM) is a promising DM candidate and able to explain the measured DM abundance by the thermal freeze-out mechanism evading the stringent bound from DM direct detection experiments. We propose a new model providing a pNG DM by introducing two Standard-Model-singlet complex scalars with the same charges of a dark U(1) gauge symmetry. They are also charged under a U(1) global symmetry corresponding to their relative phase rotations, which is explicitly broken by a soft-breaking term in the scalar potential. The both U(1) symmetries are spontaneously broken by their vacuum expectation values, giving rise to one real pNG boson. We also introduce a discrete ℤ2 symmetry exchanging the two scalars to stabilize the pNG boson as DM. It is shown that this model reproduces the DM abundance consistently with the current bound from the direct detection experiments. The model has a gauge kinetic mixing between the dark and U(1)Y gauge fields, which allows the dark gauge boson to decay even with a relatively light mass and prevents it from being an additional DM component. The Landau pole is avoided thanks to the small gauge coupling constant. In addition, a DM pair dominantly annihilates into a pair of the dark gauge bosons if the gauge boson mass is lighter than the DM mass, and thus its cross section has significantly different parameter dependence from other pNG DM models. We also calculate the DM-nucleon scattering cross section at the loop level. It turns out that it is necessary to probe region covered by the neutrino fog in order to test this model.
Non-Abelian T-dualities in two dimensional (0, 2) gauged linear sigma models
Authors: Bizet Nana Geraldine Cabo , Díaz-Correa Josué , García-Compeán Hugo 
Published: May 2024

Abstract
We consider two dimensional (2D) gauged linear sigma models (GLSMs) with (0, 2) supersymmetry and U(1) gauge group which posses global symmetries. We distinguish between two cases: one obtained as a reduction from the (2, 2) supersymmetric GLSM and another not coming from a reduction. In the first case we find the Abelian T-dual, comparing with previous studies. Then, the Abelian T-dual model of the second case is found. Instanton corrections are also discussed in both situations. We explore the vacua for the scalar potential and we analyse the target space geometry of the dual model. An example with gauge symmetry U(1) × U(1) is discussed, which posses non-Abelian global symmetry. Non-Abelian T-dualization of U(1) (0, 2) 2D GLSMs is implemented for models that arise as a reduction from the (2, 2) case; we study a model with U(1) gauge symmetry and SU(2) global symmetry. It is shown that for a positive definite scalar potential, the dual vacua to $${\mathbb{P}}^{1}$$ constitutes a disk. Instanton corrections to the superpotential are obtained and are shown to be encoded in a shift of the holomorphic function E. We conclude by analyzing an example with SU(2) × SU(2) global symmetry, obtaining that the space of dual vacua to $${\mathbb{P}}^{1}$$ × $${\mathbb{P}}^{1}$$ consists of two copies of the disk, also for the case of positive definite potential. Here we are able to fully integrate the equations of motion of non-Abelian T-duality, improving the analysis with respect to the studies in (2, 2) models.
USP11 regulates proliferation and apoptosis of human spermatogonial stem cells via HOXC5-mediated canonical WNT/β-catenin signaling pathway
Authors: Gao Jun , Xu Zhipeng , Song Weijie , Huang Jiwei , Liu Wei , He Zuping , He Leye 
Published: May 2024

AbstractSpermatogonial stem cells (SSCs) are capable of transmitting genetic information to the next generations and they are the initial cells for spermatogenesis. Nevertheless, it remains largely unknown about key genes and signaling pathways that regulate fate determinations of human SSCs and male infertility. In this study, we explored the expression, function, and mechanism of USP11 in controlling the proliferation and apoptosis of human SSCs as well as the association between its abnormality and azoospermia. We found that USP11 was predominantly expressed in human SSCs as shown by database analysis and immunohistochemistry. USP11 silencing led to decreases in proliferation and DNA synthesis and an enhancement in apoptosis of human SSCs. RNA-sequencing identified HOXC5 as a target of USP11 in human SSCs. Double immunofluorescence, Co-immunoprecipitation (Co-IP), and molecular docking demonstrated an interaction between USP11 and HOXC5 in human SSCs. HOXC5 knockdown suppressed the growth of human SSCs and increased apoptosis via the classical WNT/β-catenin pathway. In contrast, HOXC5 overexpression reversed the effect of proliferation and apoptosis induced by USP11 silencing. Significantly, lower levels of USP11 expression were observed in the testicular tissues of patients with spermatogenic disorders. Collectively, these results implicate that USP11 regulates the fate decisions of human SSCs through the HOXC5/WNT/β-catenin pathway. This study thus provides novel insights into understanding molecular mechanisms underlying human spermatogenesis and the etiology of azoospermia and it offers new targets for gene therapy of male infertility.
Loss of PBX1 function in Leydig cells causes testicular dysgenesis and male sterility
Authors: Wang Fei-Chen , Zhang Xiao-Na , Wu Shi-Xin , He Zhen , Zhang Lu-Yao , Yang Qi-En 
Published: May 2024

AbstractLeydig cells are essential components of testicular interstitial tissue and serve as a primary source of androgen in males. A functional deficiency in Leydig cells often causes severe reproductive disorders; however, the transcriptional programs underlying the fate decisions and steroidogenesis of these cells have not been fully defined. In this study, we report that the homeodomain transcription factor PBX1 is a master regulator of Leydig cell differentiation and testosterone production in mice. PBX1 was highly expressed in Leydig cells and peritubular myoid cells in the adult testis. Conditional deletion of Pbx1 in Leydig cells caused spermatogenic defects and complete sterility. Histological examinations revealed that Pbx1 deletion impaired testicular structure and led to disorganization of the seminiferous tubules. Single-cell RNA-seq analysis revealed that loss of Pbx1 function affected the fate decisions of progenitor Leydig cells and altered the transcription of genes associated with testosterone synthesis in the adult testis. Pbx1 directly regulates the transcription of genes that play important roles in steroidogenesis (Prlr, Nr2f2 and Nedd4). Further analysis demonstrated that deletion of Pbx1 leads to a significant decrease in testosterone levels, accompanied by increases in pregnenolone, androstenedione and luteinizing hormone. Collectively, our data revealed that PBX1 is indispensable for maintaining Leydig cell function. These findings provide insights into testicular dysgenesis and the regulation of hormone secretion in Leydig cells.
Graphical abstract
Multi sentence description of complex manipulation action videos
Authors: Ziaeetabar Fatemeh , Safabakhsh Reza , Momtazi Saeedeh , Tamosiunaite Minija , Wörgötter Florentin 
Published: May 2024

AbstractAutomatic video description necessitates generating natural language statements that encapsulate the actions, events, and objects within a video. An essential human capability in describing videos is to vary the level of detail, a feature that existing automatic video description methods, which typically generate single, fixed-level detail sentences, often overlook. This work delves into video descriptions of manipulation actions, where varying levels of detail are crucial to conveying information about the hierarchical structure of actions, also pertinent to contemporary robot learning techniques. We initially propose two frameworks: a hybrid statistical model and an end-to-end approach. The hybrid method, requiring significantly less data, statistically models uncertainties within video clips. Conversely, the end-to-end method, more data-intensive, establishes a direct link between the visual encoder and the language decoder, bypassing any statistical processing. Furthermore, we introduce an Integrated Method, aiming to amalgamate the benefits of both the hybrid statistical and end-to-end approaches, enhancing the adaptability and depth of video descriptions across different data availability scenarios. All three frameworks utilize LSTM stacks to facilitate description granularity, allowing videos to be depicted through either succinct single sentences or elaborate multi-sentence narratives. Quantitative results demonstrate that these methods produce more realistic descriptions than other competing approaches.