@article{Alexopoulos2012,
  author    = {Alexopoulos, Spiros},
  title     = {Biogas systems: basics, biogas multifunction, principle of fermentation and hybrid application with a solar tower for the treatment of waste animal manure},
  series = {Journal of Engineering Science and Technology Review},
  volume    = {5},
  journal   = {Journal of Engineering Science and Technology Review},
  number    = {4},
  issn      = {1791-2377},
  pages     = {48 -- 55},
  year      = {2012},
  abstract  = {Two of the main environmental problems of today's society are the continuously increasing production of organic wastes as well as the increase of carbon dioxide in the atmosphere and the related green house effect. A way to solve these problems is the production of biogas. Biogas is a combustible gas consisting of methane, carbon dioxide and small amounts of other gases and trace elements. Production of biogas through anaerobic digestion of animal manure and slurries as well as of a wide range of digestible organic wastes and agricultural residues, converts these substrates into electricity and heat and offers a natural fertiliser for agriculture. The microbiological process of decomposition of organic matter, in the absence of oxygen takes place in reactors, called digesters. Biogas can be used as a fuel in a gas turbine or burner and can be used in a hybrid solar tower system offering a solution for waste treatment of agricultural and animal residues. A solar tower system consists of a heliostat field, which concentrates direct solar irradiation on an open volumetric central receiver. The receiver heats up ambient air to temperatures of around 700°C. The hot air's heat energy is transferred to a steam Rankine cycle in a heat recovery steam generator (HRSG). The steam drives a steam turbine, which in turn drives a generator for producing electricity. In order to increase the operational hours of a solar tower power plant, a heat storage system and/ or hybridization may be considered. The advantage of solar-fossil hybrid power plants, compared to solar-only systems, lies in low additional investment costs due to an adaptable solar share and reduced technical and economical risks. On sunny days the hybrid system operates in a solar-only mode with the central receiver and on cloudy days and at night with the gas turbine only. As an alternative to methane gas, environmentally neutral biogas can be used for operating the gas turbine. Hence, the hybrid system is operated to 100\% from renewable energy sources},
  language  = {en}
}
@incollection{Jakobs2012,
  author    = {Jakobs, Helmut},
  title     = {Vorwort},
  series = {Vielen Dank f{\"u}r Ihren Einkauf : Konsumkultur aus Sicht von Design, Kunst und Medien},
  booktitle = {Vielen Dank f{\"u}r Ihren Einkauf : Konsumkultur aus Sicht von Design, Kunst und Medien},
  publisher = {Transcript Verlag},
  address   = {Bielefeld},
  isbn      = {978-3-8376-2170-9},
  pages     = {7},
  year      = {2012},
  language  = {de}
}
@incollection{Kurz2012,
  author    = {Kurz, Melanie},
  title     = {Prizing \& Pricing : Design zwischen Rang und Regal},
  series = {Vielen Dank f{\"u}r Ihren Einkauf : Konsumkultur aus Sicht von Design, Kunst und Medien},
  booktitle = {Vielen Dank f{\"u}r Ihren Einkauf : Konsumkultur aus Sicht von Design, Kunst und Medien},
  publisher = {Transcript Verlag},
  address   = {Bielefeld},
  isbn      = {978-3-8376-2170-9},
  doi       = {10.1515/transcript.9783839421703.26},
  pages     = {26 -- 39},
  year      = {2012},
  language  = {de}
}
@incollection{Fabo2012,
  author    = {Fabo, Sabine},
  title     = {Die Kunst der Irritation und ihr Mehrwert},
  series = {Vielen Dank f{\"u}r Ihren Einkauf : Konsumkultur aus Sicht von Design, Kunst und Medien},
  booktitle = {Vielen Dank f{\"u}r Ihren Einkauf : Konsumkultur aus Sicht von Design, Kunst und Medien},
  publisher = {Transcript Verlag},
  address   = {Bielefeld},
  isbn      = {978-3-8376-2170-9},
  pages     = {112 -- 145},
  year      = {2012},
  language  = {de}
}
@incollection{Fabo2012,
  author    = {Fabo, Sabine},
  title     = {Einf{\"u}hrung},
  series = {Vielen Dank f{\"u}r Ihren Einkauf : Konsumkultur aus Sicht von Design, Kunst und Medien},
  booktitle = {Vielen Dank f{\"u}r Ihren Einkauf : Konsumkultur aus Sicht von Design, Kunst und Medien},
  publisher = {Transcript Verlag},
  address   = {Bielefeld},
  isbn      = {978-3-8376-2170-9},
  pages     = {9 -- 13},
  year      = {2012},
  language  = {de}
}
@inproceedings{SchusserVaessenSchoening2012,
  author    = {Schusser, Sebastian and Vaeßen, Christiane and Sch{\"o}ning, Michael Josef},
  title     = {5. Graduiertentagung der FH Aachen 15. November 2012},
  url       = {http://nbn-resolving.de/urn:nbn:de:hbz:a96-opus-50425},
  pages     = {52},
  year      = {2012},
  abstract  = {Tagungsband der 5. Graduiertentagung der FH Aachen am 15. November 2012},
  language  = {de}
}
@article{Jochim2012,
  author    = {Jochim, Haldor E.},
  title     = {Die Ostheidebahn - eine Alternative zur Y-Trasse},
  series = {ETR - Eisenbahntechnische Rundschau},
  volume    = {61},
  journal   = {ETR - Eisenbahntechnische Rundschau},
  number    = {11},
  publisher = {DVV Media Group},
  address   = {Hamburg},
  issn      = {0013-2845},
  pages     = {34 -- 37},
  year      = {2012},
  language  = {de}
}
@misc{BaumgartnerWunderlichJaunichetal.2012,
  author    = {Baumgartner, Thomas and Wunderlich, Florian and Jaunich, Arthur and Sato, Tomoo and Bundy, Georg and Grießmann, Nadine and Kowalski, Julia and Burghardt, Stefan and Hanebrink, J{\"o}rg},
  title     = {Lighting the way: Perspectives on the global lighting market},
  edition   = {2nd ed.},
  address   = {McKinsey},
  pages     = {58},
  year      = {2012},
  language  = {en}
}
@article{FischerKowalskiPudasaini2012,
  author    = {Fischer, Jan-Thomas and Kowalski, Julia and Pudasaini, Shiva P.},
  title     = {Topographic curvature effects in applied avalanche modelling},
  series = {Cold Regions Science and Technology},
  volume    = {74-75},
  journal   = {Cold Regions Science and Technology},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {1872-7441},
  doi       = {10.1016/j.coldregions.2012.01.005},
  pages     = {21 -- 30},
  year      = {2012},
  abstract  = {This paper describes the implementation of topographic curvature effects within the RApid Mass MovementS (RAMMS) snow avalanche simulation toolbox. RAMMS is based on a model similar to shallow water equations with a Coulomb friction relation and the velocity dependent Voellmy drag. It is used for snow avalanche risk assessment in Switzerland. The snow avalanche simulation relies on back calculation of observed avalanches. The calibration of the friction parameters depends on characteristics of the avalanche track. The topographic curvature terms are not yet included in the above mentioned classical model. Here, we fundamentally improve this model by mathematically and physically including the topographic curvature effects. By decomposing the velocity dependent friction into a topography dependent term that accounts for a curvature enhancement in the Coulomb friction, and a topography independent contribution similar to the classical Voellmy drag, we construct a general curvature dependent frictional resistance, and thus propose new extended model equations. With three site-specific examples, we compare the apparent frictional resistance of the new approach, which includes topographic curvature effects, to the classical one. Our simulation results demonstrate substantial effects of the curvature on the flow dynamics e.g., the dynamic pressure distribution along the slope. The comparison of resistance coefficients between the two models demonstrates that the physically based extension presents an improvement to the classical approach. Furthermore a practical example highlights its influence on the pressure outline in the run out zone of the avalanche. Snow avalanche dynamics modeling natural terrain curvature centrifugal force friction coefficients.},
  language  = {en}
}
@article{OlaruKowalskiSethietal.2012,
  author    = {Olaru, Alexandra Maria and Kowalski, Julia and Sethi, Vaishali and Bl{\"u}mich, Bernhard},
  title     = {Exchange relaxometry of flow at small P{\´e}clet numbers in a glass bead pack},
  series = {Journal of Magnetic Resonance (JMR)},
  volume    = {220},
  journal   = {Journal of Magnetic Resonance (JMR)},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {1096-0856},
  doi       = {10.1016/j.jmr.2012.04.015},
  pages     = {32 -- 44},
  year      = {2012},
  abstract  = {In this paper we consider low P{\´e}clet number flow in bead packs. A series of relaxation exchange experiments has been conducted and evaluated by ILT analysis. In the resulting correlation maps, we observed a collapse of the signal and a translation towards smaller relaxation times with increasing flow rates, as well as a signal tilt with respect to the diagonal. In the discussion of the phenomena we present a mathematical theory for relaxation exchange experiments that considers both diffusive and advective transport. We perform simulations based on this theory and discuss them with respect to the conducted experiments.},
  language  = {en}
}