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Clausthal - Zellerfeld, Germany

The Clausthal University of Technology is an institute of technology in Clausthal-Zellerfeld, Lower Saxony, Germany. The small public university is regularly ranked among the Top German universities in engineering by CHE University Rankings.More than 30% of students and 20% of academic staff come from abroad, making it one of the most international universities in Germany.The university is best known for the prominent corporate leaders among its former students. In 2011, five of the 30 leading companies within the German stock index had alumni of TUC on their management board. Two of them as CEO.The Department of Computational Intelligence is hosting the annual Multi-Agent Programming Contest. Wikipedia.

Plischke E.,Clausthal University of Technology
Environmental Modelling and Software | Year: 2012

The use of sensitivity indicators is explicitly recommended by authorities like the EC, the US EPA and others in model valuation and audit. In this note, we want to draw the attention to a numerically efficient algorithm that computes first order global sensitivity effects from given data using a discrete cosine transformation. © 2012 Elsevier Ltd. Source

Lin J.-W.,Clausthal University of Technology
Terrestrial, Atmospheric and Oceanic Sciences | Year: 2010

This research uses eigenvalue characteristics of the Karhunen-Loéve Transform of ionospheric total electron content (TEC) to investigate precursors for 12 earthquakes of Richter magnitude scale M > 5.0 in a local region of latitude 23.00 to 24.00°N and longitude 120.00 to 121.50°E for 1 January 2002 to 31 December 2003. Previous researchers have found that in the 5 days before these earthquakes (i.e., prior to M ≥ 5.0), precursors of clear ionospheric anomalies showing sparser total electron content (TEC) were detected through statistical investigation. This was evidenced through two issues from Liu and his partners in 2001 and 2006. These issues gave credible evidence of such precursors. The precursor days having clear extreme eigenvalues of the Karhunen-Loéve Transform as the precursors instead of the sparser ionospheric TEC were also mostly in the 5 days before the 12 earthquakes of greater than M≥ 5.0. The precursors of Chi-Chi Earthquake (Mw = 7.6) with clear extreme eigenvalues were detected on the 1st, 3 rd, and 4th days before this earthquake. These results are consistent with the analyses of Liu and his partner's issue in 2001. These findings verify the validity of the Karhunen-Loéve Transform. To further verify this approach, the Karhunen-Loéve Transform is applied to an earthquake in Japan. Precursors to the Japan Iwate-Miyagi Nairiku earthquake (Mj = 7.2), with clear extreme eigenvalues are detected on the 1 st, 2nd, and 5th days before the earthquake, respectively. However, after detailed analysis, precursors of earthquakes of Richter magnitude scale M < 5 are not easy to identify using extreme eigenvalues because of existence of other ionospheric features not caused by earthquakes. Source

Plischke E.,Clausthal University of Technology
Reliability Engineering and System Safety | Year: 2010

We present an algorithm named EASI that estimates first order sensitivity indices from given data using Fast Fourier Transformations. Hence it can be used as a post-processing module for pre-computed model evaluations. Ideas for the estimation of higher order sensitivity indices are also discussed. © 2009 Elsevier Ltd. All rights reserved. Source

Rao N.V.C.,Banaras Hindu University | Lehmann B.,Clausthal University of Technology
Earth-Science Reviews | Year: 2011

A clear-cut temporal and spatial relationship between small-volume, volatile-rich and highly potassic continental melt fractions, such as kimberlites and related rocks, and large-volume continental flood basalts exists in several Large Igneous Provinces (LIPs). Many of these LIPs are also widely regarded as products of mantle plume-lithosphere interactions. The small-volume melts either immediately pre-date or post-date or even are co-eval with the main flood basalt event. The overlap of ages between the flood basalts and the kimberlites very likely reflects a cause and effect relationship via mantle plumes. Recently discovered end-Cretaceous diamondiferous kimberlites (orangeites) in the Bastar craton of central India which are synchronous with the flood basalts, carbonatites, lamprophyres and alkaline rocks of the Deccan LIP provide an opportunity to re-evaluate the role of mantle plume-lithosphere interactions in the generation of these disparate magmas. The geographical zonation of the kimberlite-lamprophyre-carbonatite-alkaline rock spectrum in the Deccan LIP is inferred to reflect variable thickness of the pre-Deccan Indian lithosphere with a thinner lithosphere along the known rift zones of northwestern and western India and a thickened lithosphere underlying the Bastar craton of central India. This heterogeneity is thought to have controlled the volume of melt generation and melt ascent, as well as the ultimate alkaline magma type. These findings are supported by the regional lithospheric thickness map, generated from converting seismic shear wave velocities into temperature profiles, which clearly depicts that the present-day lithosphere beneath the Bastar craton is thicker than that in western and NW India where the centre of the Deccan plume-head was located. Thermal weakening of the sub-Bastar craton due to mantle plume-lithosphere interaction at the end-Cretaceous resulting in a thin-spot is suggested to have controlled the Deccan-related mafic dyke emplacement in the Bastar craton. © 2011 Elsevier B.V. Source

Endres F.,Clausthal University of Technology
MRS Bulletin | Year: 2013

Ionic liquids are well suited to the electrochemical synthesis of freestanding metallic nanowires as well as macroporous metals and semiconductors. Such materials are potentially interesting for future generation Li-ion batteries. As the energy density of current Li-ion batteries barely exceeds 0.15 kWh/kg (in contrast to the 12 kWh/kg of hydrocarbons), there is a need for new anode and cathode materials if electrically driven cars are to have more than a 150 km cruising range at an affordable price. Freestanding aluminum nanowires and macroporous aluminum are easily feasible from AlCl3-based ionic liquids and show promising charge/discharge behavior even with ionic liquids as electrolytes. The challenges and the potential to make nanowires or macroporous structures of semiconductors (Si, Ge) are also briefly discussed. © 2013 Materials Research Society. Source

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