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Thermal design and optimization of heat recovery steam generators and waste heat boilers

Rezaie Navaie, Ali (2017)

Heat recovery steam generators (HRSG) are important and critical equipment of combined cycle power plants (CCPP) that connect the gas turbine system to the steam cycle. The thermal design and the o...

Synthesis, characterization and catalytic testing of metal tungstates as catalysts for activation of lower alkanes

Li, Xuan (2017)

The electronic and structural properties of vanadium-containing phases govern the formation of isolated active sites at the surface of these catalysts for selective alkane oxidation. This concept i...

In situ observation of reactive oxygen species forming on oxygen-evolving iridium surfaces

Pfeifer, Verena; Jones, Travis E.; Velasco Vélez, Juan J.; Arrigo, Rosa; Piccinin, Simone; Hävecker, Michael; Knop-Gericke, Axel; Schlögl, Robert (2017)

Water splitting performed in acidic media relies on the exceptional performance of iridium-based materials to catalyze the oxygen evolution reaction (OER). In the present work, we use in situ X-ray...

Reactive oxygen species in iridium-based OER catalysts

Pfeifer, Verena; Jones, Travis E.; Wrabetz, Sabine; Massué, Cyriac; Velasco Vélez, Juan J.; Arrigo, Rosa; Scherzer, Michael; Piccinin, Simone; Hävecker, Michael; Knop-Gericke, Axel; Schlögl, Robert (2016)

Tremendous effort has been devoted towards elucidating the fundamental reasons for the higher activity of hydrated amorphous IrIII/IV oxyhydroxides (IrOx) in the oxygen evolution reaction (OER) in ...

Nonlinear spike-and-slab sparse coding for interpretable image encoding

Shelton, Jacquelyn A.; Sheikh, Abdul-Saboor; Bornschein, Jörg; Sterne, Philip; Lücke, Jörg (2015)

Sparse coding is a popular approach to model natural images but has faced two main challenges: modelling low-level image components (such as edge-like structures and their occlusions) and modelling...

Water security in the Syr Darya Basin

Wegerich, Kai; Van Rooijen, Daniel; Soliev, Ilkhom; Mukhamedova, Nozilakhon (2015)

The importance of water security has gained prominence on the international water agenda, but the focus seems to be directed towards water demand. An essential element of water security is the func...

The costs of benefit sharing

Soliev, Ilkhom; Wegerich, Kai; Kazbekov, Jusipbek (2015)

Ongoing discussions on water-energy-food nexus generally lack a historical perspective and more rigorous institutional analysis. Scrutinizing a relatively mature benefit sharing approach in the con...

What makes Xanthomonas albilineans unique amongst xanthomonads?

Pieretti, Isabelle; Pesic, Alexander; Petras, Daniel; Royer, Monique; Süssmuth, Roderich D.; Cociancich, Stéphane (2015)

Xanthomonas albilineans causes leaf scald, a lethal disease of sugarcane. Compared to other species of Xanthomonas, X. albilineans exhibits distinctive pathogenic mechanisms, ecology and taxonomy. ...

Public economics and climate change mitigation

Siegmeier, Jan (2017)

Climate change mitigation under the recent Paris Agreement is based on voluntary, `nationally determined contributions'. Thus, it is crucial to identify and understand all relevant domestic incenti...

Mathematical optimization of rolling stock rotations

Reuther, Markus (2017)

We show how to optimize rolling stock rotations that are required for the operation of a passenger timetable. The underlying mathematical ptimization problem is called rolling stock rotation proble...

Einfluss von Preissystemen auf die Verbindungsauswahl im Eisenbahnfernverkehr

Friedrich, Johannes (2017-04-10)

Die vorliegende Arbeit ergründet den Zusammenhang zwischen der Tarifierung und der Anzahl für Fahrgäste relevanter Verbindungen im Eisenbahnfernverkehr. Nach einer Abgrenzung des Untersuchungsraum...

Automatisierte Vermessung und Charakterisierung der dynamischen Eigenschaften seilgebundener, vollflexibler Tragflächen

Hummel, Jan (2017)

Die Entwicklung und Bedeutung vollflexibler, seilgebundener Tragflächen ist seit der Jahrtausendwende stark vorangeschritten. Grund hierfür ist zum einen die quantitative Zunahme an weltweiten Inst...

Call Graph Generated by Simulation-Based Tracing and Profiling

Busse, Anselm; Karnapke, Reinhardt; Parzyjegla, Helge (2017)

A Database of Anechoic Microphone Array Measurements of Musical Instruments

Weinzierl, Stefan; Vorländer, Michael; Behler, Gottfried; Brinkmann, Fabian; von Coler, Henrik; Detzner, Erik; Krämer, Johannes; Lindau, Alexander; Pollow, Martin; Schulz, Frank; Shabtai, Noam R. (2017-04-10)

A collection of 3305 single notes of 41 musical instruments of different historical periods was recorded and analyzed. The database includes the instrument recordings, radiation patterns (directivi...

Automated spatiotemporal landslide mapping over large areas using RapidEye time series data

Behling, Robert; Roessner, Sigrid; Kaufmann, Hermann; Kleinschmit, Birgit (2014)

In the past, different approaches for automated landslide identification based on multispectral satellite remote sensing were developed to focus on the analysis of the spatial distribution of lands...

Identification of reactive oxygen species in iridium-based OER catalysts by in situ photoemission and absorption spectroscopy

Pfeifer, Verena (2017)

A change in our energy supply from fossil fuels to intermittent renewables requires energy storage capacity. Part of this capacity may be delivered from chemical energy conversion relying on H2 as ...

Robust automated image co-registration of optical multi-sensor time series data

Behling, Robert; Roessner, Sigrid; Segl, Karl; Kleinschmit, Birgit; Kaufmann, Hermann (2014)

Reliable multi-temporal landslide detection over longer periods of time requires multi-sensor time series data characterized by high internal geometric stability, as well as high relative and absol...

Von der Kritischen Rekonstruktion zur 'Mitteschön!'

Tomczak, André (2013)

Die Magisterarbeit analysiert die Hintergründe, die zur Rekonstruktion der Stadtschloss-Fassaden beim Bau des neuen Brandenburgischen Landtages in Potsdam führten. Zugleich werden die Wirkungen der...

Adhesive normal contact between flat punch and a visco-elastic half-space in Dugdale approximation

Rengshausen, Julia (2017)

This work shows an analytical approach to solving problems of normal adhesive contact where visco-elastic material behavior is present. The geometry is limited to a flat punch in contact with a hal...

Active emulsion droplets driven by Marangoni flow

Schmitt, Maximilian (2017)

Diese Forschungarbeit beinhaltet Theorie und Simulation aktiver Emulsionstropfen, die aufgrund einer inhomogenen Oberflächenspannung auf ihrer Grenzfläche schwimmen. Der zugrundeliegende Effekt hei...