526 research outputs found
Brugg im 19. Jahrhundert
No full textSamuel HeubergerSonderdruck aus: Taschenbuch der historischen Gesellschaft des Kantons Aargau für das Jahr 1904, S. 31-76
Valeria Heuberger: Unter dem Doppeladler: Die Nationalitaten der Habsburger Monarchie 1848-1918.: Wien, Verlag Christian Brandstatter 1997, 208 s.
No full textA review of the book by Valeria Heuberger
Orogen‐Parallel Migration of Exhumation in the Eastern Aar Massif Revealed by Low‐T Thermochronometry
No full textNew and published (U-Th)/He data on zircon, apatite, and zircon fission track ages constrain the thermal overprint and cooling history of the eastern Aar Massif, Switzerland. The timing and pattern of cooling is in agreement with independent kinematic and age constraints from exposed shear zones. This suggests that the cooling ages mainly reflect exhumation and that long-term exhumation-dynamics were mainly controlled by crustal-scale tectonic processes. Results of a statistical inverse model reveal significant diachrony in the timing of exhumation in the along-strike direction. Maximum exhumation rates (urn:x-wiley:21699313:media:jgrb55226:jgrb55226-math-00011 mm/yr) were initially located in the central Aar Massif (from urn:x-wiley:21699313:media:jgrb55226:jgrb55226-math-000222 to 10 Ma), then gradually migrated to the east between urn:x-wiley:21699313:media:jgrb55226:jgrb55226-math-000310 Ma and present, while the central Aar Massif continued to exhume at slower rates (urn:x-wiley:21699313:media:jgrb55226:jgrb55226-math-00040.5 mm/yr). The diachrony in the timing of exhumation may be explained by lateral variations in the inherited thickness or the density of the accreted European crust. We attribute the increase in exhumation rates between 2 Ma and present to enhanced glacial erosion. Nevertheless, the post 2 Ma exhumation pattern reflects a continuation of noncylindrical massif “growth” in the eastward orogen-parallel direction. This indicates that—although at slow rates—thick-skinned and buoyancy-driven compressional deformation, likely enhanced by the presence of easily erodible flysch units at the surface, might still be ongoing especially in the eastern Aar Massif. Noncylindrical massif-growth is likely to also affect other External Crystalline Massifs or orogens, but may be overlooked because studies often focus on single orogen-perpendicular transects
Canonical trees, compact prefix-free codes, and sums of unit fractions: a probabilistic analysis
No full textCITATION: Heuberger, C., Krenn, D. & Wagner, S. 2015. Canonical trees, compact prefix-free codes, and sums of unit fractions: a probabilistic analysis. SIAM Journal on Discrete Mathematics, 29(3):1600–1653, doi:10.1137/15M1017107.The original publication is available at http://epubs.siam.org/journal/sjdmecFor fixed t ≥ 2, we consider the class of representations of 1 as a sum of unit fractions
whose denominators are powers of t, or equivalently the class of canonical compact t-ary Huffman
codes, or equivalently rooted t-ary plane “canonical” trees. We study the probabilistic behavior of
the height (limit distribution is shown to be normal), the number of distinct summands (normal
distribution), the path length (normal distribution), the width (main term of the expectation and
concentration property), and the number of leaves at maximum distance from the root (discrete
distribution).http://epubs.siam.org/doi/abs/10.1137/15M1017107Publisher's versio
On approximate system identification with system based orthonormal functions
No full textMechanical Maritime and Materials Engineerin
Fade correlation and diversity effects in satellite broadcasting to mobile users in S-band
No full textS.359-37926Nr.
The chromatic number of 5-valent circulants
No full textAbstractA circulant C(n;S) with connection set S={a1,a2,…,am} is the graph with vertex set Zn, the cyclic group of order n, and edge set E={{i,j}:|i−j|∈S}. The chromatic number of connected circulants of degree at most four has been previously determined completely by Heuberger [C. Heuberger, On planarity and colorability of circulant graphs, Discrete Math. 268 (2003) 153–169]. In this paper, we determine completely the chromatic number of connected circulants C(n;a,b,n/2) of degree 5. The methods used are essentially extensions of Heuberger’s method but the formulae developed are much more complex
Assessment of the dynamic response of a floating pontoon bridge with a fiber reinforced polymer superstructure
No full textFloating bridges are found at locations where deep water must be crossed for a long distance, such as in Norwegian fjords. The superstructure of the existing floating bridges is usually constructed from steel. In a marine environment these bridges are exposed to dynamic wave loads. As such, the current floating bridges suffer severe damage due to corrosion and fatigue. Using fiber reinforced polymer instead of steel could alleviate these phenomena and reduce maintenance costs. However, the lower stiffness could cause undesired vibrations in the floating bridge. Therefore a parametric model is developed to investigate the influence of design parameters on the dynamic response of a floating pontoon bridge.A literature study is performed to find suitable concepts and techniques to develop the floating bridge model. A floating pontoon bridge can be schematized with rigid bodies, Euler-Bernoulli beam elements and linear springs and dashpots. The fluid-structure interaction is taken into account by including the added mass, hydrodynamic damping, hydrostatic stiffness and wave force transfer functions of the pontoons. A frequency domain approach is used to compute the dynamic response. A parametric model of a floating pontoon bridge to predict the dynamic response is developed in Python. The hydrodynamic properties of the pontoons are computed by Diffrac and are used as input for the Python model. The Bergsøysund bridge is used as a reference case, because measurement data of this bridge’s dynamic response is available and can be used for validation.The geometrical and structural properties of the Bergsøsund bridge are used to model its dynamic response. Wave conditions with a peak frequency at 2 rad/s are used. The results show that the response of the pontoons is governing compared to the response of the superstructure and that the dominant degree of freedom is sway. The fourth sway mode is the main contributor to this dynamic response. A comparison with measurement data shows that the produced response spectra are in good agreement with the measurements in terms of the peak locations.In the parametric study the influence of single design parameters on the dynamic response of a floating bridge is investigated independently. The results show that the length of the superstructure has the biggest influence on the dynamic response of the floating bridge. In general, a reduction in stiffness in the superstructure leads to a lower overall frequency response function and thus to a lower dynamic response. Increasing the stiffness or reducing the mass of the bridge shifts the eigenfrequency of the fourth sway mode to a higher frequency and vice versa. Finally, when the damping is increased, the peaks in the frequency response function decrease and thereby the dynamic response in resonance reduces.In conclusion, the dynamic response of a floating end-supported pontoon bridge is mainly influenced by the stiffness of the superstructure. A fiber reinforced polymer superstructure should be designed sufficiently stiff, especially in lateral direction, to keep the overall frequency response function low enough. <br/
Neon Ultra-Feinlecktest zur Vorhersage der Vakuumerhaltung resonanter Mikrosensoren
No full textDer Neon Ultra-Fein Lecktest ist eine Druckanstiegsmethode zur Überprüfung der Gasdichtigkeit evakuierter Mikrosensorgehäuse mit integrierten Resonatoren und integriertem Getter auf Waferebene zu 100 % mit einer Messauflösung im Bereich 10E-16 mbar l /s. The Neon Ultra-Fine Leak test is a 100 % leak rate screen on wafer level for evacuated microresonator packages with a air leak rate resolution in the range of 10E-16 mbar l/s. The test is compatible with integrated getter and nanoliter package cavity volume
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