OPUS - Publikationenserver der Technischen Hochschule Nürnberg Georg Simon Ohm
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Lichttechnik: Licht und Beleuchtung II
No full textEs wird auf die physikalischen Grundlagen zur Beschreibung von Materialeigenschaften eingegangen: Reflexionsgrad, Transmissionsgrad, Absorptionsgrad, Leuchtdichtekoeffizient und Rückstrahlwert
Maßnahmenkatalog Green IT an bayerischen Hochschulen
No full textDer vorliegende Maßnahmenkatalog bietet abgestimmte Empfehlungen, um Nachhaltigkeit für bayerische Hochschulen im Bereich Green IT zu fördern. Ziel ist es, energieeffizientes Verhalten zu unterstützen und die IT-Landschaft nachhaltiger zu gestalten. Die Maßnahmen zielen nicht nur auf die Förderung eines verantwortungsvollen Handelns ab, sondern bieten auch das Potenzial, langfristig Kosteneinsparungen durch einen energieeffizienten Betrieb zu erzielen. Gleichzeitig wird nachhaltiges Handeln durch gesetzliche Vorgaben wie dem Energieeffizienzgesetz zunehmend verbindlicher, da auch Hochschulen diesen Anforderungen unterliegen. Der Maßnahmenkatalog unterstützt dabei, diese regulatorischen Anforderungen zu erfüllen und gleichzeitig einen wesentlichen Beitrag zur Ressourcenschonung sowie zur Reduzierung von Treibhausgasemissionen zu leiste
Förderliche Rahmenbedingungen zur Integration von Peer-Beratung in sozialpsychiatrischen Einrichtungen
No full textSystematische Übersichtsarbeit zur Studienlage in Deutschlan
Gameaudio_Stimulus_1
No full textTrack 1/16 für die Bachelorarbeit "Gestaltung und technische Umsetzung von interaktiver Musik für ein Computerspiel
A Framework for the assessment of affective sounds
No full textThis paper is based on the German-language paper "Methods for Designing UX Sounds", which was presented at DAGA 2023 in Hamburg. Future work was announced there to investigate the affective impact of UX-sounds. This article will present the framework for evaluating the affective impact of sounds in the dimensions "valence" and "arousal". The experimental setup, the experimental execution and the evaluation method will be presented.The methods used to generate synthetically generated sounds for test subjects will also be described
A cellular-meso-macro three-scale approach captures remodelling of cancellous bone in health and disease
No full textRemodelling of cancellous bone due to the combined activity of osteoclasts and osteoblasts at the cellular scale has notable repercussions both at the meso (tissue) as well as the macro (organ) scale. At the meso scale, trabeculae adapt their geometry, typically in terms of their cross section, whereas the nominal bone density evolves at the macro scale, all in response to habitual mechanical loading and its perturbations. To capture this intricate scale coupling, we here propose a novel conceptual three-scale approach to the remodelling of cancellous bone. Therein, we combine a detailed bone cell population model at the cellular scale with an idealised trabecular truss network model with adaptive cross sections, that are driven by the cell population model, at the meso scale, which is eventually upscaled to a continuum bone density adaption model at the macro scale. Algorithmically, we solve the meso and macro problems concurrently within a finite element setting and update the cell activity in a staggered fashion. Our benchmark simulations demonstrate the applicability and effectivity of the three-scale approach to analyse bone remodelling in health and disease (here exemplified for the example of osteoporosis) with rich details, e.g. evolving anisotropy, resolved at each scale
Investigation of the mechanical, microstructure, thermal and gamma-ray attenuation characteristics of serpentinite and ilmenite-based concrete as bio-shielding materials
No full textOwing to nuclear technology’s significance in medical, industrial and military applications, this study assessed the effectiveness of some Egyptian raw materials in the production of heavy-weight concrete to shield hazards emitted radiations. Three mix-designs containing different coarser aggregates (dolomite (D), serpentinite (S) and ilmenite (Il)) were prepared. Their workability and physico-mechanical characteristics were examined. The hydrated concretes’ phase composition and microstructure were analyzed using XRD, TGA/DTG and SEM/optical-microscopy. The impact of elevated temperatures (300, 600 and 900◦C for 2 hrs) on the mechanical properties was studied. The volume stability of concrete specimens was investigated using a hot-stage microscope and thermodynamics calculations. Finally, the gamma-ray attenuation was evaluated against the 137Cs radioactive isotope with 0.662 MeV energy. The results revealed that Il-concrete has the highest slump value, highest bulk density and lowest water absorption. Also, it has the most outstanding efficiency in gamma-ray shielding; its attenuation is higher than D-concrete and S-concrete by 271.2 and 168.1 %, respectively. Replacing dolomite with serpentinite and ilmenite harms mechanical performance. However, the compressive-strength of the prepared concretes is in the range of 24.10–41.06 MPa at 28-days, achieving the building code’s requirements for structural concrete. At elevated temperature, S-concrete showed the highest compressive-strength retention and highest volume stability
Relating Cutoff Pressure Distribution and Acoustic Signature of Centrifugal Fans through Experimental Correlation
Get PDFPotential noise sources of rotating machinery are diverse and complex. This includes the acoustic signature of the impeller itself and the design of the fan casing. This is especially true for centrifugal fans with an asymmetric spiral casing. Here, a nonuniform and unsteady pressure field interacts with the volute cutoff, thus resulting in broadband noise radiation and, under given geometric circumstances, significant tonal noise effects. The current study investigates the relation between the local pressure distribution at the volute cutoff and the acoustic farfield signature of the fan. A low-speed centrifugal fan, placed in an anechoic environment, is equipped with pressure sensors to gather information on the mean pressure distribution and the unsteady wall pressure field at selected spots. Correlating the captured signature with the radiated far-field noise reveals significant common spectral components and helps identify relevant noise sources, affected by the volute cutoff. In the long term, the definition of transfer functions between the near-field wall pressure and the radiated noise into the far-field is expected to enhance the geometric optimisation of the volute cutoff in both experimental and numerical environments. The test rig, in close agreement with ISO 5801, allows for simultaneous capture of the aerodynamic performance, allowing for an analysis of the pressure correlation along the entire characteristic curve