bluuebunny/crossref_metadata_2025_split huggingface dataset:
Scheme for Evolutionary Navier-Stokes-Fourier System with Temperature Dependent Material Properties Based on Spectral/hp Elements
Authors: Pech Jan 
Published: August 2020

AbstractThe computational algorithm for evolutionary Navier-Stokes-Fourier system with temperature dependent material properties (density, viscosity and thermal conductivity) is presented and tested. As a consequence of the thermal expansion, the velocity field is not divergence free. The system fully couples the momentum balance with non-linear advection-diffusion equation for temperature. The model is suitable for low speed flow simulations of the Newtonian, calorically perfect fluid, which obeys Fourier law. The algorithm is an extension of a well known semi-implicit scheme for incompressible Navier-Stokes equations in primitive variable formulation. Performance is tested on manufactured solution, what gives an overview to the temporal convergence. Comparison with experimental data is also presented.
Implicit Large Eddy Simulations for NACA0012 Airfoils Using Compressible and Incompressible Discontinuous Galerkin Solvers
Authors: Ferrer Esteban , Manzanero Juan , Rueda-Ramirez Andres M. , Rubio Gonzalo , Valero Eusebio 
Published: August 2020

AbstractWe present implicit Large Eddy Simulations for NACA0012 airfoils at various Reynolds numbers (Re = 1 × 104, Re = 1 × 105 and Re = 1 × 106) and Angles of Attack (0∘≤ AoA ≤ 10∘) using two discontinuous Galerkin formulations. On the one hand, we use a compressible solver based on a nodal DGSEM formulation and supplemented with a stabilising split-form formulation (Pirozzoli) and Roe interface fluxes. On the other hand, we use an incompressible DG-Fourier formulation that uses the interior penalty parameter to provide localised dissipation. Both solvers enable high order computations by varying the polynomial order inside mesh elements, which are here set to P = 3 and P = 4. We provide results of aerodynamic coefficients and pressure distributions using both solvers to show how they are able to provide under-resolved flows that agree well with experimental data and well established solvers (Xfoil or Ansys-Fluent).
An Explicit Hybridizable Discontinuous Galerkin Method for the 3D Time-Domain Maxwell Equations
Authors: Nehmetallah Georges , Lanteri Stéphane , Descombes Stéphane , Christophe Alexandra 
Published: August 2020

AbstractWe present an explicit hybridizable discontinuous Galerkin (HDG) method for numerically solving the system of three-dimensional (3D) time-domain Maxwell equations. The method is fully explicit similarly to classical so-called DGTD (Discontinuous Galerkin Time-Domain) methods, is also high-order accurate in both space and time and can be seen as a generalization of the classical DGTD scheme based on upwind fluxes. We provide numerical results aiming at assessing its numerical convergence properties by considering a model problem and we present some results of the superconvergence property on the Hcurl norm.
Iterative Spectral Mollification and Conjugation for Successive Edge Detection
Authors: Tuzun Robert E. , Jung Jae-Hun 
Published: August 2020

AbstractFourier concentration method is a well-established method for finding edges given a set of truncated Fourier data. However, it is hard to distinguish weak jumps from the Gibbs oscillations with the method unless the concentration is highly refined locally. In this note, we show that it is possible to find all edges whether strong or weak by using the method iteratively. The iterative method first finds strong edges followed by an iterative procedure in which previously found edges are smoothed by local adaptive mollifier. The iterative method is advantageous when the ratio of the largest to smallest jump magnitudes is significantly large.
Small Trees for High Order Whitney Elements
Authors: Rodríguez Ana Alonso , Rapetti Francesca 
Published: August 2020

AbstractIn applied computations the need arises to define, for example, a discrete field with assigned curl or to represent a div-free field in a given discrete space. In the low degree case this need is often fulfilled by employing tree and co-tree techniques. The definition of tree and co-tree is thus revisited here in the frame of high order Whitney element reconstructions. We consider the case of fields that are reconstructed in a contractible polyhedral domain
$$\varOmega \in \mathbb R^3$$

Ω
∈

ℝ

3

, with connected boundary ∂Ω, starting from their weights over suitable “small simplices” in a simplicial mesh
$${\mathcal M}$$

ℳ
of the domain
$$\bar \varOmega $$

Ω

̄

.
On the Convergence Rate of Hermite-Fejér Interpolation
Authors: Xiang Shuhuang , He Guo 
Published: August 2020

AbstractBy the Peano kernel theorem, this paper establishes the convergence rates for Hermite-Fejér interpolation with the observed function values and its first derivatives at Gauss-Jacobi pointsystems. These error bounds share that for a function analytic in the Bernstein ellipse
$$\mathcal {E}_{\rho }$$

ℰ

ρ

, the error decays exponentially; while for a functions of finite regularity, the error decays depending on the regularity.
Fifth-Order Finite-Volume WENO on Cylindrical Grids
Authors: Shadab Mohammad Afzal , Ji Xing , Xu Kun 
Published: August 2020

AbstractFifth-order finite-volume WENO is proposed for a structured grid in cylindrical coordinates. The derivation of linear weights, optimal weights uses a polynomial approximation in a dimension-by-dimension framework, implemented with the local conservation property. Finally, a Vandermonde-like system is obtained, which can be solved for linear weights on both regularly-spaced and irregularly-spaced grids in cylindrical coordinates, where the analytical relations can be derived for the former. In addition, a grid-independent formulation for evaluating the smoothness indicators is derived by minimizing the L2-norm of the derivatives of reconstruction polynomial. The scheme converges to WENO-JS for the limiting case (R →∞).A linear stability analysis of the proposed reconstruction scheme is performed using a 1D scalar advection equation in cylindrical-radial coordinates. Several tests are performed to assess the performance of the proposed scheme. The results indicate that WENO-Curvilinear significantly improves the results when compared with the previous methods.
Greedy Kernel Methods for Center Manifold Approximation
Authors: Haasdonk Bernard , Hamzi Boumediene , Santin Gabriele , Wittwar Dominik 
Published: August 2020

AbstractFor certain dynamical systems it is possible to significantly simplify the study of stability by means of the center manifold theory. This theory allows to isolate the complicated asymptotic behavior of the system close to a non-hyperbolic equilibrium point, and to obtain meaningful predictions of its behavior by analyzing a reduced dimensional problem. Since the manifold is usually not known, approximation methods are of great interest to obtain qualitative estimates. In this work, we use a data-based greedy kernel method to construct a suitable approximation of the manifold close to the equilibrium. The data are collected by repeated numerical simulation of the full system by means of a high-accuracy solver, which generates sets of discrete trajectories that are then used to construct a surrogate model of the manifold. The method is tested on different examples which show promising performance and good accuracy.
HPS Accelerated Spectral Solvers for Time Dependent Problems: Part I, Algorithms
Authors: Babb Tracy , Martinsson Per-Gunnar , Appelö Daniel 
Published: August 2020

AbstractA high-order convergent numerical method for solving linear and non-linear parabolic PDEs is presented. The time-stepping is done via an explicit, singly diagonally implicit Runge–Kutta (ESDIRK) method of order 4 or 5, and for the implicit solve, we use the recently developed “Hierarchial Poincaré–Steklov (HPS)” method. The HPS method combines a multidomain spectral collocation discretization technique (a “patching method”) with a nested-dissection type direct solver. In the context under consideration, the elliptic solve required in each time-step involves the same coefficient matrix, which makes the use of a direct solver particularly effective. In this chapter is the first in a two part sequence; the first part describes the methodology, the second part presents numerical experiments.
Introduction: The Pirate as a Figure of Crisis and Legitimacy
Authors: Ganser Alexandra 
Published: August 2020

AbstractThe introductory section begins with a brief account of the role of piracy in transatlantic popular culture from the early modern times to the nineteenth century as well as a semantic contextualization of piracy as a political and historical legal categorization. It presents a theoretical discussion about piracy in the context of historical scenarios of crisis, followed by a critical debate about the romance with piracy that has characterized much scholarship on this figure. In addition, it includes an outline of the chapters and a section on its method, inspired by Edward Said’s contrapuntal reading approach.
Pirate Narratives and the Revolutionary Atlantic in the Early Republic and the Antebellum Period
Authors: Ganser Alexandra 
Published: August 2020

AbstractIn this chapter, piracy is explored in the context of the (post-)revolutionary Atlantic. It demonstrates how at the moment of the political declaration of independence, in which the crisis of colonial legitimacy was performatively resolved, the sign of piracy was externalized by the claim that the British monarch was a pirate and that the future U.S. thus had a natural right to independence. The chapter examines how historical romances in early American literature (such as Cooper’s The Red Rover) adapted Byronic images of piracy in tales of the revolution, appropriating the pirate as a foundational figure and an ideal type of patriotic outlaw masculinity. Even in narrating the crisis in gender relations, as revolutionary femininities gave way to Republican motherhood and the “cult of true womanhood” in the nineteenth century, revolutionary pirates were prominent figures in popular literary production geared towards an increasingly female readership, as in Lt. Murray’s Fanny Campbell (1844/1845). Former revolutionary heroines (here in the form of a patriotic female pirate) were domesticated in such historical romance-novelettes to make palpable the ongoing transition to a more conservative feminine ideal.
Ethical Considerations in Crowdfunding
Authors: Shneor Rotem , Torjesen Stina 
Published: August 2020

AbstractThe current chapter addresses ethical issues in crowdfunding practice from a multiple stakeholder perspective. It draws on ethical principles outlined in both classical and business-specific approaches. The discussion first presents classical approaches to ethical decision making. It then discusses whether crowdfunding presents an ethical solution or a source of ethical problems. Later, it suggests a framework presenting a classification of potential ethical dilemmas and pitfalls in crowdfunding practice, as well as potential means for addressing them. The discussion concludes with concrete implications for crowdfunding ethics research and practice.
Legal Institutions, Social Capital, and Financial Crowdfunding: A Multilevel Perspective
Authors: Cai Wanxiang , Polzin Friedemann , Stam Erik 
Published: August 2020

AbstractIn recent years, financial crowdfunding for entrepreneurship has experienced exponential growth. Because financial crowdfunding involves a range of risks, it requires comprehensive governance mechanisms. In the entrepreneurial finance literature, both legal institutions and social capital have been discussed in order to address the risks in financial markets. This chapter builds a three-level stylized model to explain how legal institutions and social capital at macro, meso, and micro levels affect the performance of crowdfunding campaigns and the development of the financial crowdfunding market. We explicitly highlight the role of platforms in enforcing laws and building social capital at both meso and micro levels, which has been neglected in extant perspectives on the development of the crowdfunding market, and we develop corresponding propositions.
Der Fragetyp STACK
Authors: Weigel Miriam 
Published: August 2020

ZusammenfassungDas Plug-in STACK (System for Teaching and Assessment using a Computer algebra Kernel) wurde ursprünglich 2004 von Chris Sangwin (University of Edinburgh) für das Lernmanagementsystem (LMS) Moodle erstellt. Im Jahr 2013 wurde STACK dann im Auftrag von optes von Fred Neumann und Jesus Copado (FAU Erlangen) für das LMS ILIAS implementiert.
E-Klausur-Infrastruktur mit ILIAS
Authors: Sandal Cüneyt , Daniel Manfred 
Published: August 2020

ZusammenfassungE-Klausuren werden an der DHBW Karlsruhe mit dem Lernmanagementsystem (LMS) ILIAS umgesetzt. Hierzu mussten prozess- und technikbezogene Entscheidungen getroffen werden unter Berücksichtigung von Rahmenbedingungen der Hochschule. Im folgenden Abschnitt wird der E-Klausuren-Prozess aus technischer Sicht dargestellt, dabei wird die gewählte Infrastruktur in Abgrenzung zu möglichen Alternativen dargestellt.
Curriculum
Authors: Hübl Reinhold , Derr Katja , Huckenbeck Ulrich , Mechelke-Schwede Edith , Obermayr David , Weigel Miriam 
Published: August 2020

ZusammenfassungWährend über die Relevanz der Grundlagenmathematik für den Studienerfolg in MINT-Fächern weitgehend Konsens besteht, ist die Frage, welche mathematischen Inhalte diese Grundlagenmathematik ausmachen, deutlich schwieriger zu beantworten. Entsprechend stellte die Entscheidung über die Lerninhalte und den Umfang des optes-Kurs-Curriculums eine große Herausforderung dar.
Lernmodule Grundlagenmathematik
Authors: Derr Katja , Hübl Reinhold , Huckenbeck Ulrich , Mechelke-Schwede Edith , Obermayr David , Weigel Miriam 
Published: August 2020

ZusammenfassungKern des didaktischen Konzepts von optes ist die Nutzerführung über Tests und Übungsaufgaben. Da sich die Vorkenntnisse der Kursteilnehmer*innen sehr stark unterscheiden, wird mit diagnostischen Selbsttests gearbeitet, die den Lernenden helfen, das Kursmaterial vorzustrukturieren und Auswahlentscheidungen zu treffen (siehe auch Kapitel 9). Jedem Lernziel in einem LoK (siehe Kapitel 14) ist ein Lernmodul zugeordnet, das die Hintergrundinformationen liefert, die zur Erreichung des Lernziels benötigt werden.
Digitales, begleitetes Selbststudium
Authors: Paul Daria , Schmidt Christian , Reinmann Gabi , Marquardt Victoria 
Published: August 2020

ZusammenfassungBeim Begriff „Selbststudium“ handelt es sich genauer betrachtet um einen Pleonasmus, denn wer studiert, muss dies – in jedem denkbaren Lernsetting – genau genommen immer selbst tun. Trotzdem hat sich der Begriff in der Hochschullehre etabliert, um den selbstgesteuerten und selbstorganisierten Anteil der Studiertätigkeit hervorzuheben, welcher seit der Bologna-Reform (1999) auch formal durch die Vergabe von Credit Points berücksichtigt wird (Kleß 2017).
Projekt- und Wissensmanagement in Verbundprojekten
Authors: Ivanova Albena , Kölle Alexandra , Magdanz Nina , Schreiber Anne 
Published: August 2020

ZusammenfassungEin Projekt kennzeichnet sich meist als ein innovatives, bereichsübergreifendes, zeitlich begrenztes sowie ergebnisorientiertes Vorhaben (Kuster et al. 2019, S. 4). Neben inhaltlichen Zielen und fachlichen Auseinandersetzungen fallen auch administrative und strukturelle Aufgaben an. Größere Projektvorhaben, die aus zwei oder mehreren (gleichberechtigten) Partnern bestehen, werden oftmals im Projektverbund organisiert.
Projektergebnisse als freie Bildungsinhalte (OER)
Authors: Kunkel Matthias 
Published: August 2020

ZusammenfassungDer Zuschlag für die Projektförderung 2012 versetzte die an optes beteiligten Hochschulen in die angenehme Lage, in den folgenden Jahren Maßnahmen für die Verbesserung der Mathematik-Kenntnisse ihrer angehenden Studierenden in den verschiedenen MINT-Fächern entwickeln und umzusetzen zu können. Die in optes zu erstellenden Materialien und Dokumente würden aber mit Sicherheit auch für andere Hochschulen, die keine entsprechende Förderung erhielten, von Interesse sein. Deshalb wurde schon im Projektantrag ein Teilprojekt „Dissemination“ festgelegt. Dessen Hauptaufgabe war es, alle Projektergebnisse interessierten Dritten bereitzustellen.
Möglichkeiten der Dissemination in einem Verbundprojekt
Authors: Köhler Daniel 
Published: August 2020

ZusammenfassungDie im optes-Verbundprojekt entwickelten propädeutischen Angebote wurden in erster Linie für die zum Verbundprojekt zugehörigen Hochschulen mit dem Ziel entwickelt, die Studienabbruchquoten bei Studienanfänger*innen insbesondere bei MINT-Studiengängen durch die Nacharbeitung fehlender Mathematikkenntnisse zu senken.
Studien-Mathematikvorbereitung
Authors: Derr Katja , Hübl Reinhold , Huckenbeck Ulrich , Mechelke-Schwede Edith , Obermayr David , Weigel Miriam 
Published: August 2020

ZusammenfassungAusgangssituation des Projekts optes war, dass viele angehende Studierende nicht ausreichend auf die Anforderungen eines (MINT-)Studiums vorbereitet sind: Einerseits fachlich, und zwar im Bereich der Grundlagenmathematik, andererseits überfachlich, also in Bezug auf die Fähigkeit, selbstständig und zielorientiert zu lernen. Auch acht Jahre nach Projektstart hat dieser Befund seine Gültigkeit: Lückenhaftes Wissen und fehlende Routine führen dazu, dass viele Studienanfänger*innen Probleme haben, den Vorlesungen im ersten Semester zu folgen. Wissensdefizite können sich so in kurzer Zeit aufsummieren und den Studienerfolg gefährden.
Klassifizierung mathematischer Handlungsaspekte im optes-Vorkurs
Authors: Roos Anna-Katharina , Weigand Hans-Georg , Wörler Jan Franz 
Published: August 2020

ZusammenfassungWelches mathematische Wissen und Können, welche Fähigkeiten und Fertigkeiten benötigen Studierende eines technischen Studiengangs? Welche Definitionen mathematischer Begriffe sollten sie kennen, welche Rechenverfahren richtig anwenden können, welche mathematischen Beweise sollten sie wiedergeben, nachvollziehen oder selbst finden können? Diese Fragen standen am Anfang der Erstellung des optes-Onlinekurses Mathematik.
BRiTE Mind: Introducing Mindfulness to Cultivate Personal and Professional Resilience in Teachers
Authors: Correia Helen 
Published: August 2020

AbstractMindfulness in education has gained increasing focus over the last decade. Various programmes have been developed for students, teachers and principals, in efforts to improve well-being and resilience in the face of increasing demands and stressors. With teachers often at the forefront of these demands, mindfulness offers the potential to support personal and professional resilience, through enhanced self-awareness, supporting well-being and developing mindful relationships. This chapter describes the development of an online module introducing mindfulness to pre-service teachers, specifically integrating concepts underpinning resilience as outlined in the BRiTE programme. Key elements of mindfulness are explored including mindful attention in the present moment, awareness of emotion and cultivating mindful attitudes, such as compassion. These are applied specifically to teacher experiences to support conscious and mindful action, for personal well-being, and in the classroom.
Practical Applications for Building Teacher WellBeing in Education
Authors: Falecki Daniela , Mann Elizabeth 
Published: August 2020

AbstractUNESCO states the world must recruit 69 million new teachers to reach the 2030 educational goals, but unfortunately, 80% of the current teachers are considering leaving the profession. Teachers are the greatest resource in education and therefore, must be given opportunities to learn skills in resilience to ensure the profession’s sustainability. This chapter will highlight the threats to teacher wellbeing and resilience and suggest skills, strategies and practices to support the wellbeing of teachers in schools. Given the increasing burnout and attrition rates of teachers, it seems reasonable to suggest that the same careful planning that goes into developing student wellbeing programmes should be applied in the development of teacher wellbeing programmes. Through the research of Positive Psychology, this chapter explores evidence-based interventions teachers can learn to develop protective factors to buffer against excessive stress. We explore the application of positive psychology in the workplace and the need for professional learning to focus on the development of the Psychological Capital of our teachers. This includes building their inner HERO with hope, efficacy, resilience and optimism.
‘Head’ First: Principal Self-care to Promote Teacher Resilience
Authors: Klap Johanne , MacCallum Judith , Mansfield Caroline F. 
Published: August 2020

AbstractAs leaders of school communities, principals have a significant impact on school culture and teachers’ well-being at work. A school principal’s positive or negative emotions can influence the mood of their teaching staff and can enhance or hinder a teacher’s resilience. Unfortunately, though, many school principals suffer from their own high levels of stress, emotional exhaustion and fatigue-related issues, whilst concurrently being tasked with the responsibility and management of the well-being of their staff. In this chapter, we explore the role of mindfulness and self-care in promoting resilience as a way for school principals to meet the challenges of their role. Principals who are mindful and employ self-compassion are better placed and more resilient to positively impact others and flourish in their role. Leadership does matter and ensuring that we address leaders’ well-being and resilience will mean they will be better equipped to engender resilience in their staff.
Resilience Building for Pre-service Teachers: BRiTE, Micro-Teaching and Augmented Reality/Simulation (BRiTE-AR)
Authors: Ledger Susan 
Published: August 2020

AbstractInitial teacher education predominately spends time preparing student teachers to plan, teach and assess the cognitive and social development of children within the classroom. Yet, the role of a teacher expands well beyond classroom experiences and at times includes conflict and stressful situations. How do ITE programs cater for these critical learning incidences? Augmented realities such as ‘human in the loop’ simulation and virtual learning environments provide current ITE programs a solution to this contemporary need and context. This paper is underpinned conceptually by Pedagogies of Practice: representation, decomposition and approximations actualised through new technologies, reflective practice strategies and challenging learning experiences. The interconnectivity between BRiTE modules (representations), Microteaching 2.0 (decomposition) and Simlab™ experiences (approximation) provides a unique approach that supports the development of resilience for our future teacher educators. The findings reveal an increased self-efficacy amongst the cohort and personal confidence in their own resilience capabilities. The reflective practice strategies embedded in the BRiTE-AR pedagogy of practices are offered as a possible solution to ITE educators interested in developing resilience in our future teachers.