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See detail2-stage process for a higher flexibility of biogas-plants
Greger, Manfred UL; Benito-Martins, Patricia; Schlienz, Markus UL

Scientific Conference (2016, September 21)

The increasing part of renewable energy in the electricity production mix with its known fluctuations of wind and photovoltaic plants is leading to an enlarged discrepancy of production and consumption ... [more ▼]

The increasing part of renewable energy in the electricity production mix with its known fluctuations of wind and photovoltaic plants is leading to an enlarged discrepancy of production and consumption. Up to now the electricity production of biogas plants is more or less constant but could be used in future more to balance the energy production by using higher biogas storage capacity. An interesting alternative could be a 2 stage process. The 1st stage is operated at higher loadings and low pH where mainly substrate hydrolysis takes place and relatively small quantities of H2/CO2 gas are produced. The effluent shows high concentrations (total > 10 g FA/l) of mainly butyric and caproic acid which could easily and stable be temporarily stored in liquid-tanks. The transformation of the acidic intermediates from hydrolysis to biogas (and finally electricity) in the 2nd stage is faster compared to the traditional fermentation. The storage capacity for the acidic intermediates is more than 10 times smaller compared to the temporary storage of biogas. [less ▲]

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See detail200 Jahre Großherzogtum
Pauly, Michel UL

Article for general public (2015)

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See detail2005-2015: Des référendums créateurs d'identité
Scuto, Denis UL

Article for general public (2015)

Weekly column on contemporary history ("L'histoire du temps présent") in Luxembourg newspaper Tageblatt, here on the referenda of 2005 on the European Constitutional Treaty and of 2015 on the right to ... [more ▼]

Weekly column on contemporary history ("L'histoire du temps présent") in Luxembourg newspaper Tageblatt, here on the referenda of 2005 on the European Constitutional Treaty and of 2015 on the right to vote on national elections in Luxembourg for foreigners [less ▲]

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See detailThe 2011 European Short Sale Ban: An Option Market Perspective
Kräussl, Roman UL

E-print/Working paper (2014)

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See detail2015 Lab report - Legato report 001
Bordas, Stéphane UL

Report (2016)

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See detail2015 Workshop on Socio-Technical Aspects in Security and Trust, STAST 2015, Verona, Italy, July 13, 2015
Bella, Giampaolo; Lenzini, Gabriele UL

Scientific Conference (2015, July 13)

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See detail22. Percorsi folli, circolari e ad otto nel teatro di Luigi Pirandello. Così è (se vi pare), Sei personaggi in cerca d'autore, Enrico IV
Cicotti, Claudio UL

in Klinkert, Thomas; Rössner, Michael (Eds.) Zentrum und Peripherie: Pirandello zwischen Sizilien, Italien und Europa (2006)

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See detail§§ 241-249 AktG zur Nichtigkeit und Anfechtung von HV-Beschlüssen, Kölner Kommentar zum Aktiengesetz
Zetzsche, Dirk Andreas UL; Noack, Urlich

Book published by Zöllner/Noack - 3. Auflage, Band 5 (2016)

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See detail25 Jahre Individualisierungsthese: Das Ende von Klassenstrukturen und Klassenbewusstsein?
Hadjar, Andreas UL; Becker, Rolf

in Soeffner, Hans-Georg (Ed.) Unsichere Zeiten. Herausforderungen gesellschaftlicher Transformationen. Verhandlungen des 34. Kongresses der Deutschen Gesellschaft für Soziologie in Jena 2008. Band 2 (Begleit-CD-ROM) (2010)

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See detail25 years on - from cultural studies to intercultural citizenship
Byram, Michael UL

in Language, Culture and Curriculum (2014), 27(3), 209-225

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See detail2d gauge theories and generalized geometry
Kotov, Alexei; Salnikov, Vladimir UL; Strobl, Thomas

in Journal of High Energy Physics [=JHEP] (2014)

We show that in the context of two-dimensional sigma models minimal coupling of an ordinary rigid symmetry Lie algebra g leads naturally to the appearance of the “generalized tangent bundle” TM ≡ T M ⊕ T ... [more ▼]

We show that in the context of two-dimensional sigma models minimal coupling of an ordinary rigid symmetry Lie algebra g leads naturally to the appearance of the “generalized tangent bundle” TM ≡ T M ⊕ T ∗ M by means of composite fields. Gauge transformations of the composite fields follow the Courant bracket, closing upon the choice of a Dirac structure D ⊂ TM (or, more generally, the choide of a “small Dirac-Rinehart sheaf” D), in which the fields as well as the symmetry parameters are to take values. In these new variables, the gauge theory takes the form of a (non-topological) Dirac sigma model, which is applicable in a more general context and proves to be universal in two space-time dimensions: a gauging of g of a standard sigma model with Wess-Zumino term exists, iff there is a prolongation of the rigid symmetry to a Lie algebroid morphism from the action Lie algebroid M × g → M into D → M (or the algebraic analogue of the morphism in the case of D). The gauged sigma model results from a pullback by this morphism from the Dirac sigma model, which proves to be universal in two-spacetime dimensions in this sense. [less ▲]

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See detail2d PHT splines implementation in C++
Peng, Xuan; Bordas, Stéphane UL

Learning material (2016)

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See detail2D Tool-Path Generation Method for Multi-Axis Milling Machine using ToF camera
Ahmad, Rafiq UL; Plapper, Peter UL

Scientific Conference (2014, September 12)

Multi-axis machines are known for their precise production of complex parts, where multi-tool are working in the same area or static workpiece support or clamping parts, may cause collision problems. It ... [more ▼]

Multi-axis machines are known for their precise production of complex parts, where multi-tool are working in the same area or static workpiece support or clamping parts, may cause collision problems. It is therefore necessary to identify potential collision risks and avoid them in an efficient way, which may cause production stops and machinery damage. This research study has been focusing on safe non-functional (rapid) tool-path generation for multi-axis milling machine, where no efficient automatic collision avoidance solution exists (in the literature). A 3D Time of Flight (TOF) camera attached into the machine will be able to sense any unwanted situation in the manufacturing environment and provide rapid and automatic solution to detect and avoid collisions for safe tool movements during production. In the presence of obstacles, the proposed approach will provide decisions regarding tool-path correction and improvement automatically. The proposed algorithm based on 3D vision concept is also able to take into account unknown obstacle shape, size during production but dynamic aspects of the scene will be treated in future. The concept presented take into account the 3D information from the scene for traversal safe tool-paths generation for a static environment as an initial application, which will be adapted to more complex real machining scenarios by integrating it with STEP-NC technology in future. [less ▲]

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See detailThe 2nd MYNT
Yoo, Hwajong UL

Presentation (2013, August 28)

We present the multiplicity one theorem for Eisenstein maximal ideals.

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See detailA 3.2% efficient Kesterite device from electrodeposited stacked elemental layers
Scragg, Jonathan J.; Berg, Dominik UL; Dale, Phillip UL

in Journal of Electroanalytical Chemistry (2010), 646(1-2), 52-59

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See detail30 Jahre Geschichte - 700 Jahre Tradition - 171 Minuten Film. Das Heldenepos ‚Braveheart‘ (USA, 1995) von und mit Mel Gibson
Kolnberger, Thomas UL

in Historische Sozialkunde: Geschichte - Fachdidaktik - Politische Bildung (2006), 3

Detailed reference viewed: 35 (2 UL)