606 research outputs found
Der Kaisermaler. Rudolf Wimmer 1849-1915
No full textRudolf Wimmer (*1849 in Gottsdorf, Ndb., +1915 in München) war Hofmaler des letzten deutschen Kaisers Wilhelm II. und der bayerisch-wittelsbachischen Königsfamilie. Darüber hinaus galt er als anerkannter Münchner Gesellschaftsmaler der zweiten Hälfte des 19. Jahrhunderts. Als einzigartig gilt Wimmers Schaffen zum Themenbereich der Herstellung von Glas und optischen Instrumenten im Zusammenhang mit Joseph von Fraunhofer und der Optikerfamilie Merz, zu der er durch die Heirat seiner zweiten Frau Barbara Wimmer, geborene Merz, in verwandtschaftlicher Beziehung stand. „Der Kaisermaler. Rudolf Wimmer 1849-1915“ geht neben der Porträtisten-Tätigkeit Wimmers am preußischen und bayerischen Hof auch umfassend auf die Lebensumstände des Künstlers ein und stellt ihn neben seiner Beschäftigung in der Porträt- und Genremalerei erstmals auch als Landschafter und Maler sakraler Themen der Öffentlichkeit vor. Zudem beschäftigt sich die Arbeit im letzten Abschnitt eingehend mit der „Hofkunst“ unter Kaiser Wilhelm II. und versucht einen qualitativ-stilistischen Vergleich der bekanntesten Porträts des Kaisers aus der Hand unterschiedlicher Künstler
sj-pdf-1-tia-10.1177_23312165231191382 - Supplemental material for BPACE: A Bayesian, Patient-Centered Procedure for Matrix Speech Tests in Noise
No full textSupplemental material, sj-pdf-1-tia-10.1177_23312165231191382 for BPACE: A Bayesian, Patient-Centered Procedure for Matrix Speech Tests in Noise by Christoph Schmid, Wilhelm Wimmer and Martin Kompis in Trends in Hearing</p
Josephson current via an isolated Majorana zero mode
No full textWe study the equilibrium dc Josephson current in a junction between an s-wave and a topological superconductor. Cooper pairs from the s-wave superconducting lead can transfer to the topological side either via an unpaired Majorana zero mode localized near the junction or via the above-gap continuum states. We find that the Majorana contribution to the supercurrent can be switched on when time-reversal symmetry in the conventional lead is broken, e.g., by an externally applied magnetic field inducing a Zeeman splitting. Moreover, if the magnetic field has a component in the direction of the effective spin-orbit field, there will be a Majorana-induced anomalous supercurrent at zero phase difference. These behaviors may serve as a signature characteristic of Majorana zero modes and are accessible to devices with only superconducting contacts.QRD/Wimmer GroupBUS/Quantum Delf
Multidisciplinary Approaches toward an Improved Efficacy of Cochlear Implants
No full textThe cochlear implant (CI) is an auditory prosthesis that electrically stimulates the cochlear nerve to restore hearing. Although modern CI systems have proven to be a successful treatment for hearing impaired or deaf people, there are significant differences in the performance between people with normal hearing and CI recipients. This thesis aims to contribute to the field of cochlear implantation with a multidisciplinary approach, addressing problems related to minimally invasive surgical implantation and front-end processing of CI audio processors.
First, concepts required for the clinical application of a minimally invasive robotic cochlear implantation approach were investigated. A computer-assisted method for scala tympani access and insertion
trajectory planning was developed and evaluated in ex vivo models. With the proposed method, it was possible to achieve full scala tympani insertions in cases demanding a trajectory positioning accuracy below 0.5 mm. The study demonstrated that an optimal access to the scala tympani can be planned and performed with the robotic system.
Furthermore, a manual insertion procedure for the minimally invasive approach was developed and tested. In all 8 tested specimens it was possible to insert the CI electrode arrays through the small drill tunnel using the proposed procedure, showing the feasibility of the approach.
Second, front-end processing strategies of novel CI audio processors were evaluated. The influence of the microphone position of a single-unit processor on speech intelligibility in noise was investigated
in a clinical study with 12 experienced CI users. It was shown that detrimental effects on speech reception are introduced by microphones positioned further to the back of the head. The signal-to-noise ratio was significantly better with the behind-the-ear processor when compared with the single-unit processor, if noise was presented from behind (4.4 dB, p <0.001). Directional microphone systems could be applied to overcome this drawback. A second audiological study with 10 subjects evaluated the expected benefit of a pinna effect imitating directional microphone system. The directional microphone setting improved the speech reception thresholds by up to 3.6 dB (p <0.01)
on average when compared to the omnidirectional mode, indicating that CI users can benefit from the directional microphone system
Planung, Navigation und Robotik in der Hörimplantologie
No full textDie digitalisierte Medizin bietet großes Potenzial, um Eingriffe schonender und präziser durchführen zu können. Auch in der Hörimplantologie haben moderne Planungs- und Navigationsverfahren sowie roboterbasierte Assistenzsysteme in den letzten Jahren Einzug genommen. Durch den Einsatz dieser Systeme erhoffen sich Experten verbesserte chirurgische und audiologische Behandlungsergebnisse bei den Patienten
Unified numerical approach to topological semiconductor-superconductor heterostructures
No full textWe develop a unified numerical approach for modeling semiconductor-superconductor heterostructures. All the key physical ingredients of these systems - orbital effect of magnetic field, superconducting proximity effect, and electrostatic environment - are taken into account on equal footing in a realistic device geometry. As a model system, we consider indium arsenide (InAs) nanowires with an epitaxial aluminum (Al) shell, which is one of the most promising platforms for Majorana zero modes. We demonstrate qualitative and quantitative agreement of the obtained results with the existing experimental data. Finally, we characterize the topological superconducting phase emerging in a finite magnetic field and calculate the corresponding topological phase diagram.QRD/Wimmer Grou
Quae obiectiones nonnullas refellit
No full textWittenberg, Univ., Diss., 1799Pars 2 verf. von Schundenius, Carolus Henricus [Präses] und Lippold, Joannes Fridericus [Resp.]. - Pars 3 verf. von Schundenius, Carolus Henricus [Präses] und Wimmer, Guilielmus Traugott [Resp.]Vorlageform des Erscheinungsvermerks: Vitebergae Literis Christiani Philippi Meltzeri Academiae Typographi
Replication Data for: Power and Pride. National Identity and Ethnopolitical Inequality around the World
No full textWhy do some individuals embrace nationalist rhetoric and feel proud of their citizenship while others do not? This article introduces an exchange-theoretic perspective, according to which national pride depends on access to political power. Seen from this perspective, members of ethnic groups that are not represented in national-level government should be less proud of their nation than those included in the polity. Furthermore, ethnic violence in the past or power-sharing arrangements in the present should reduce trust in the future stability of political representation and thus pride in the nation. From a dynamic point of view, members of ethnic groups whose level of political representation decreased in the past should also see their nation in a less positive light today. To show this, the author uses existing surveys to assemble a new data set with answers to a similar question about national pride. It covers 123 countries that comprise 92 percent of the world’s population. For roughly half of these countries, the ethnic groups listed in the surveys could also be found in another data set that contains information on the political status of these groups. Multilevel ordered logistic regressions at both the country and the group level confirm these hypotheses while taking into account a wide range of individual-level and country-level variables discussed in the existing literature
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