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Schermer D.C.,Ostbayerische Technische Hochschule Regensburg
Brick and Block Masonry: Trends, Innovations and Challenges - Proceedings of the 16th International Brick and Block Masonry Conference, IBMAC 2016 | Year: 2016

As masonry is the composition of discrete units and mortar joints with different material characteristics and dominating interface effects it cannot be regarded as a continuum material. For the stress state in masonry walls with dominant in-plane lateral loadings, the distribution of stresses significantly differs from an isotropic approach, especially regarding the ultimate-limit-state within design process. Thus, experimental methods for the determination of the shear-load bearing capacity and deformation behaviour under combined in-plane-loadings are essential to receive proper and realistic results. Regarding masonry under seismic loadings the effects of energy dissipation and the development of stiffness degradation and maximum load resistance under cyclic-loadings are essential. Therefore a shear test method on full-scale cantilever walls was developed, describing the boundary conditions in common masonry structures in a realistic way. Based on numerical investigations a test procedure is proposed, where the relevant loadings axial force, horizontal force and in-plane moment are applied independently at the top of the wall specimen. To ensure a constant stress distribution and to avoid local stress peaks, a stiff beam is proposed to be placed at the top of the specimen. To describe in-plane bending restraint of the walls in the floor slabs in common structures, the rotation is prevented by a restraint bending moment at the top. It is proposed to be linked with the horizontal force to result a moment of zero at mid height of the wall. The horizontal load is applied either monotonic or static-cyclic with specified rising amplitude to simulate the behaviour under seismic loadings. © 2016 Taylor & Francis Group, London.


Braun B.,University of Bremen | Klemperer D.,Ostbayerische Technische Hochschule Regensburg
Public Health Forum | Year: 2015

Focus on the requirements, needs and preferences of patients has been the basis of the rhetoric of healthcare for many years. Despite some practical steps in this direction, everyday life in the German health system is still different. This will only change when care researchers, health policy makers and practitioners make patient centeredness the starting point of their sights and actions. © 2015 by De Gruyter.


PubMed | Organisation for Economic Co-operation and Development, Lown Institute, Stanford University, Ostbayerische Technische Hochschule Regensburg and 2 more.
Type: | Journal: Lancet (London, England) | Year: 2017

The global ubiquity of overuse and underuse of health-care resources and the gravity of resulting harms necessitate an investigation of drivers to inform potential solutions. We describe the network of influences that contribute to poor care and suggest that it is driven by factors that fall into three domains: money and finance; knowledge, bias, and uncertainty; and power and human relationships. In each domain the drivers operate at the global, national, regional, and individual level, and are modulated by the specific contexts within which they act. We discuss in detail drivers of poor care in each domain.


A reflective optical sensor system for distance measurements in white-goods applications is presented. The technical solution implements a well-known intensity referencing principle - the optical bridge - in a low-cost design. The influence of the ambient temperature can be compensated for. The spurious effects such as slow output drift caused by aging of optical components or the variation of the system sensitivity due to the parameter spreading of system components can be successfully overcome as well. An algorithm for linearizing the system response is described and optimized for a low-cost microcontroller. Finally, a prototype of an assembly line, which is used for producing this sensor system, is described and its basic funcionallity is demonstrated. © 2014 Oldenbourg Wissenschaftsverlag GmbH, Ein Unternehmen von de Gruyter GmbH, Berlin/Boston.


Grant
Agency: European Commission | Branch: H2020 | Program: CSA | Phase: DS-07-2015 | Award Amount: 1.57M | Year: 2016

The growing complexity of the digital ecosystem in combination with increasing global risks entail the danger that enforcing cybersecurity may bypass other fundamental values like equality, fairness or privacy, whereas downplaying cybersecurity would undermine citizens trust and confidence in the digital infrastructure. Technology developers as well as legal and philosophical scholars and empirical researchers have dealt for many years with cybersecurity issues, although from very specific angles. What is missing is community-building that unifies these perspectives from the presupposition that technology development in cybersecurity should incorporate European values and fundamental rights. Constructing this community an alliance for value-driven cybersecurity is the central aim of the CANVAS consortium. CANVAS consists of partners from different scientific traditions ethical, legal, empirical and technological with unique competences and broad contact networks such that they can serve as seed crystals for community-building. The consortium will take three domains of application with unique value-profiles and complementing cybersecurity exigencies the health system, finance, and police / national security as starting point for outlining problems related to value-driven cybersecurity. Using a three-step process, CANVAS will (1) structure existing knowledge, (2) design a network for exchanging knowledge and generating insights across domains, and (3) disseminate the insights gained through three means: A reference curriculum for value-driven cybersecurity with a focus on industry-training, briefing packages for policy stakeholders, and a MOOC (massive open online course) on value-driven cybersecurity. Furthermore, the alliance that should result from this community-building will allow for self-organization among alliance members for tackle specific research questions that emerge out of knowledge exchange in future proposals.


Aubram D.,TU Berlin | Rackwitz F.,Ostbayerische Technische Hochschule Regensburg | Wriggers P.,Leibniz University of Hanover | Savidis S.A.,TU Berlin
Computers and Geotechnics | Year: 2015

The numerical simulation of penetration into sand is one of the most challenging problems in computational geomechanics. The paper presents an arbitrary Lagrangian-Eulerian (ALE) finite element method for plane and axisymmetric quasi-static penetration into sand which overcomes the problems associated with the classical approaches. An operator-split is applied which breaks up solution of the governing equations over a time step into a Lagrangian step, a mesh motion step, and a transport step. A unique feature of the ALE method is an advanced hypoplastic rate constitutive equation to realistically predict stress and density changes within the material even at large deformations. In addition, an efficient optimization-based algorithm has been implemented to smooth out the non-convexly distorted mesh regions that occur below a penetrator. Applications to shallow penetration and pile penetration are given which make use of the developments. © 2014 Elsevier Ltd.


Helms U.,Nationale Kontakt und Informationsstelle Zur Anregung | Klemperer D.,Ostbayerische Technische Hochschule Regensburg
Tagliche Praxis | Year: 2015

To what extent in the self-help field conflicts of interest exist, can not be assessed properly due to incomplete transparency. In the authors' perspective full transparency about funding and influence by companies is required. However, transparency in itself is not sufficient. In addition a greater sensitivity to the risk of conflicts of interest and avoiding conflicts of interest are necessary.


Helms U.,Nationale Kontakt und Informationsstelle zur Anregung | Klemperer D.,Ostbayerische Technische Hochschule Regensburg
Chirurgische Praxis | Year: 2015

To what extent in the self-help field conflicts of interest exist, can not be assessed properly due to incomplete transparency. In the authors perspective full transparency about funding and influence by companies is required. However, transparency in itself is not sufficient. In addition a greater sensitivity to the risk of conflicts of interest and avoiding conflicts of interest are necessary.


Patent
Ostbayerische Technische Hochschule Regensburg | Date: 2016-02-10

Provided is an energy harvester (10) comprising a support member (12) to be exposed to ambient mechanical impulses, a transducer (36), wherein the transducer is arranged such as to permit vibrations of the transducer at a first frequency upon excitation by mechanical impact to thereby convert mechanical energy to electric power, and an impact member (20) for actively or passively providing a mechanical impact to the transducer, wherein one or both of the impact member and the transducer is/are coupled with the support member via a spring mechanism, allowing the impact member and/or the transducer to oscillate with regard to the support member upon exposure of the support member to ambient mechanical impulses, wherein a natural frequency of said oscillation(s) of the impact member and/or the transducer is lower than the first frequency, and wherein the transducer and the impact member are arranged relative to each other such that the impact member and the transducer collide if the amplitude of said oscillation(s) of the impact member and/or the transducer exceeds a threshold value to thereby exert said mechanical impact on the transducer.


Patent
Ostbayerische Technische Hochschule Regensburg | Date: 2016-06-15

The present invention relates to a travel stretcher for transporting a patient, in particular for use at large events, comprising a travel frame, provided with wheels, and comprising a privacy screen for the patient. So as to develop the travel stretcher in such a way that the adjustment work for the privacy screen, which is required for transport and obstructive during treatment, can be made more efficient, and the patient can be transported and treated with greater comfort and at lesser expense, the invention provides that the privacy screen (5) is vertically displaceable on the undercarriage (2).

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