21 Result(s)
within
Johannes Kraus
English
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Chapter and Conference Paper
Multilevel Preconditioning of 2D Rannacher-Turek FE Problems; Additive and Multiplicative Methods
In the present paper we concentrate on algebraic two-level and multilevel preconditioners for symmetric positive definite problems arising from discretization by Rannacher-Turek non-conforming rotated bilinear...
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Chapter and Conference Paper
Multilevel Preconditioning of Rotated Trilinear Non-conforming Finite Element Problems
In this paper algebraic two-level and multilevel preconditioning algorithms for second order elliptic boundary value problems are constructed, where the discretization is done using Rannacher-Turek non-conform...
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Chapter and Conference Paper
A Fixed-Grid Finite Element Algebraic Multigrid Approach for Interface Shape Optimization Governed by 2-Dimensional Magnetostatics
The paper deals with a fast computational method for discretized optimal shape design problems governed by 2–dimensional magnetostatics. We discretize the underlying state problem using linear Lagrange triangu...
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Chapter and Conference Paper
Multilevel Preconditioning of Crouzeix-Raviart 3D Pure Displacement Elasticity Problems
In this study we demonstrate how some different techniques which were introduced and studied in previous works by the authors can be integrated and extended in the construction of efficient algebraic multileve...
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Article
Rehospitalization rates after transcatheter aortic valve implantation
ZIEL: Komorbiditäten stellen beträchtliche Herausforderungen an Screening, Selektion und Nachbeobachtung vor bzw. nach transkutaner Aortenklappenimplantation (TAVI) ebenso wie an die Prozedur selbst. Ziel der ...
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Chapter and Conference Paper
An Algebraic Multigrid Method Based on Matching in Graphs
We present an Algebraic Multigrid (AMG) method for graph Laplacian problems. The coarse graphs are constructed recursively by pair-wise aggregation, or matching as in [3] and we use an Algebraic Multilevel Ite...
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Article
On the robustness and optimality of algebraic multilevel methods for reaction–diffusion type problems
This paper is on preconditioners for reaction–diffusion problems that are both, uniform with respect to the reaction–diffusion coefficients, and optimal in terms of computational complexity. The considered pre...
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Article
Open AccessThe novel β2-selective proteasome inhibitor LU-102 decreases phosphorylation of I kappa B and induces highly synergistic cytotoxicity in combination with ibrutinib in multiple myeloma cells
Proteasome-inhibiting drugs (PI) are gaining importance in hematologic oncology. The proteasome carries three proteolytically active subunits (β1, β2, β5). All established PI (bortezomib and carfilzomib), as ...
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Chapter and Conference Paper
Auxiliary Space Multigrid Method for Elliptic Problems with Highly Varying Coefficients
The robust preconditioning of linear systems of algebraic equations arising from discretizations of partial differential equations (PDE) is a fastly develo** area of scientific research. In many applications...
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Article
A robust multigrid method for discontinuous Galerkin discretizations of Stokes and linear elasticity equations
We consider multigrid methods for discontinuous Galerkin \(H({\text {div}},\Omega )\) ...
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Chapter
From Car-Driver-Handovers to Cooperative Interfaces: Visions for Driver–Vehicle Interaction in Automated Driving
As long as automated vehicles are not able to handle driving in every possible situation, drivers will still have to take part in the driving task from time to time. Recent research focused on handing over con...
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Article
Open AccessExercise-related T-wave oversensing: an underestimated cause of reduced exercise capacity in a pacemaker-dependent patient—a case report and review of the literature
A 62-year-old pacemaker-dependent patient presented to our department with a sudden onset of reduced physical capacity. While initial physical and pacemaker evaluations remained without specific findings, Holt...
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Chapter and Conference Paper
Solving Cooperative Situations: Strategic Driving Decisions Depending on Perceptions and Expectations About Other Drivers
Cooperative traffic situations, in which at least two agents interact, represent not only safety-critical situations but also relevant situations for maintaining traffic flow. The successful solution of cooper...
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Article
Small Talk with a Robot? The Impact of Dialog Content, Talk Initiative, and Gaze Behavior of a Social Robot on Trust, Acceptance, and Proximity
Appropriate human likeness for social robots is said to increase trust and acceptance. Whether this applies to human communication features like dialog initiative needs to be investigated. Dialog initiative co...
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Article
Open AccessStep Aside! VR-Based Evaluation of Adaptive Robot Conflict Resolution Strategies for Domestic Service Robots
As domestic service robots become more prevalent and act autonomously, conflicts of interest between humans and robots become more likely. Hereby, the robot shall be able to negotiate with humans effectively a...
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Article
Open AccessFindings From A Qualitative Field Study with An Autonomous Robot in Public: Exploration of User Reactions and Conflicts
Soon service robots will be employed in public spaces with frequent human-robot interaction (HRI). To achieve a safe, trustworthy and acceptable HRI, service robots need to be equipped with interaction strate...
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Article
Robust Approximation of Generalized Biot-Brinkman Problems
The generalized Biot-Brinkman equations describe the displacement, pressures and fluxes in an elastic medium permeated by multiple viscous fluid networks and can be used to study complex poromechanical interac...
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Chapter
A Posteriori Error Estimates for Domain Decomposition Methods
Nowadays, a posteriori error control methods have formed a new important part of the numerical analysis. Their purpose is to obtain computable error estimates in various norms and error indicators that show di...
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Article
Open AccessOn the Role of Beliefs and Trust for the Intention to Use Service Robots: An Integrated Trustworthiness Beliefs Model for Robot Acceptance
With the increasing abilities of robots, the prediction of user decisions needs to go beyond the usability perspective, for example, by integrating distinctive beliefs and trust. In an online study (N = 400), fir...
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Chapter
Designing and Implementing an Interactive Cloud Platform for Teaching Machine Learning with Medical Data
Machine learning (ML), especially deep learning (DL), is a field of research that has recently attracted enormous attention and is currently evolving rapidly. New applications in economics, industry, and healt...
