Verbundforschung

49 Items

Recent Submissions
Adapting the water management to mitigate the impact of multiple stressors on an urban lake

Ladwig, Robert (2019)

Urban lakes are aquatic ecosystems that are influenced by a water management system and by a possibly strongly sealed urban catchment. The water management aims to fulfill multiple objectives: providing drinking water, sanitation and recreation for the people as well as keeping the ecosystem in a sustainable and resilient state. Urban lakes are facing several stressors. For instance, climate ch...

Evaluating the Impact of Wastewater Effluent on Microbial Communities in the Panke, an Urban River

Nega, Marcella ; Braun, Burga ; Künzel, Sven ; Szewzyk, Ulrich (2019-04-28)

Pharmaceuticals are consumed in high amounts and can enter as emerging organic compounds in surface waters as they are only partially retained in wastewater treatment plants (WWTPs). Receiving pharmaceuticals may burden the aquatic environment, as they are designed to be bioactive even at low concentrations. Sediment biofilm populations were analyzed in river sediments due to the exposure of an...

Estimating Pore Water Electrical Conductivity of Sandy Soil from Time Domain Reflectometry Records Using a Time-Varying Dynamic Linear Model

Aljoumani, Basem ; Sanchez-Espigares, Jose A. ; Wessolek, Gerd (2018-12-13)

Despite the importance of computing soil pore water electrical conductivity (σp) from soil bulk electrical conductivity (σb) in ecological and hydrological applications, a good method of doing so remains elusive. The Hilhorst concept offers a theoretical model describing a linear relationship between σb, and relative dielectric permittivity (εb) in moist soil. The reciprocal of pore water elect...

Reducing global CO2 emissions with the technologies we have

Ward, Hauke ; Radebach, Alexander ; Vierhaus, Ingmar ; Fügenschuh, Armin ; Steckel, Jan Christoph (2017)

The energy intensities of the various industrial sectors differ considerably across countries. This suggests a potential for emissions reductions through improved accessibility to efficient technologies. This paper estimates an upper-bound CO2 emission mitigation potential that could theoretically be achieved by improved access to efficient technologies in industrial sectors. We develop a linea...

Entwicklung von Fehlererkennungs-, Zustandsschätzungs-, Regelungs- und ganzzahligen Optimalsteuerungsmethoden für pulsierende, detonative Brennkammern anhand eines akustischen Ersatzsystems

Wolff, Sascha Dominik (2019)

Aktuelle Forschungsbestrebungen zur Effizienzsteigerung von Gasturbinen verfolgen häufig den Ansatz eines Wechsels des zugrundeliegenden Kreisprozesses weg vom Brayton- hin zum Humphrey-Kreisprozess. Eine vielversprechende Möglichkeit, diesen Kreisprozess technischzu realisieren, ist durch den Einsatz einer pulsierenden, druckerhöhenden Detonationsbrennkammer gegeben. Eine solche Brennkammer be...

Compressible starting jet: pinch-off and vortex ring–trailing jet interaction

Peña Fernández, Juan José ; Sesterhenn, Jörn (2017)

The dominant feature of the compressible starting jet is the interaction between the emerging vortex ring and the trailing jet. There are two types of interaction: the shock–shear layer–vortex interaction and the shear layer–vortex interaction. The former is clearly not present in the incompressible case, since there are no shocks. The shear layer–vortex interaction has been reported in the lit...

Statistics of fully turbulent impinging jets

Wilke, Robert ; Sesterhenn, Jörn (2017)

Direct numerical simulations (DNS) of subsonic and supersonic impinging jets with Reynolds numbers of 3300 and 8000 are carried out to analyse their statistical properties with respect to heat transfer. The Reynolds number range is at low or moderate values in terms of practical applications, but very high regarding the technical possibilities of DNS. A Reynolds number of 8000 is technically re...

Assessing carbon dioxide emission reduction potentials of improved manufacturing processes using multiregional input output frameworks

Ward, Hauke ; Burger, Mia ; Chang, Ya-Ju ; Fürstmann, Paul ; Neugebauer, Sabrina ; Radebach, Alexander ; Sproesser, Gunther ; Pittner, Andreas ; Rethmeier, Michael ; Uhlmann, Eckart ; Steckel, Jan Christoph (2016)

Evaluating innovative process technologies has become highly important within the last decades. As standard tools different Life Cycle Assessment methods have been established, which are continuously improved. While those are designed for evaluating single processes they run into difficulties when it comes to assessing environmental impacts of process innovations at macroeconomic level. In this...

Truncation Error Estimates in Process Life Cycle Assessment Using Input‐Output Analysis

Ward, Hauke ; Wenz, Leonie ; Steckel, Jan Christoph ; Minx, Jan (2017)

Process life cycle assessment (PLCA) is widely used to quantify environmental flows associated with the manufacturing of products and other processes. As PLCA always depends on defining a system boundary, its application involves truncation errors. Different methods of estimating truncation errors are proposed in the literature; most of these are based on artificially constructed system complet...

The effect of industry delocalization on global energy use: A global sectoral perspective

Forin, Silvia ; Radebach, Alexander ; Steckel, Jan Christoph ; Ward, Hauke (2018)

Sectoral production technologies differ largely across countries, so do sectoral energy intensities. Hence, shifts in production locations within global sectors, possibly caused by environmental regulations, are likely to have an impact on aggregated energy usage and emissions. Applying a Logarithmic Mean Divisia Index decomposition we decompose changes of sectoral energy use from 2001–2011 int...

Planning the Ideal Refugee Camp? A Critical Interrogation of Recent Planning Innovations in Jordan and Germany

Dalal, Ayham ; Darweesh, Amer ; Misselwitz, Philipp ; Steigemann, Anna (2018)

With the increase of refugee movements since 2014 in Europe and the Near East, the debate of how to plan appropriate shelters and emergency accommodation has gained a new momentum. Established techno-managerial approaches have been criticised as inappropriate and the professional community of planners and architects was increasingly drawn into debates for alternative solutions. This article tra...

Reports about 8 selected benchmark cases of model hierarchies

Auer, Naomi ; Barral, Patricia ; Benamou, Jean-David ; Comesaña, Daniel Fernández ; Girfoglio, Michele ; Hauberg-Lotte, Lena ; Hintermüller, Michael ; Ijzerman, Wilbert ; Knall, Karl ; Maass, Peter ; Marconi, Gianfranco ; Martinolli, Marco ; Monticone, Pier Paolo ; Morelli, Umberto ; Nayak, Ashwin ; Polverelli, Luc ; Prieto, Andrés ; Quintela, Peregrina ; Ramlau, Ronny ; Riccardo, Conte ; Rozza, Gianluigi ; Rukhaia, Giorgi ; Shah, Nirav ; Stadler, Bernadett ; Vergara, Christian (2018-09-30)

Based on the multitude of industrial applications, benchmarks for model hierarchies will be created that will form a basis for the interdisciplinary research and for the training programme. These will be equipped with publically available data and will be used for training in modelling, model testing, reduced order modelling, error estimation, efficiency optimization in algorithmic approaches, ...

ESR Recruitment Final Summary Report

Mehrmann, Volker ; Scholz, Lena (2018-08-29)

In this deliverable we report on the recruitment process and the recruitment results within the ROMSOC project. We also comment on the application timeline, strategies for advertisements and on the selection process. In summary, after approximately one year all ESR positions could be filled with very promising candidates. The deviation of the original work plan due to delays in the recruitment...

Application-Specific Cache and Prefetching for HEVC CABAC Decoding

Habermann, Philipp ; Chi, Chi Ching ; Álvarez-Mesa, Mauricio ; Juurlink, Ben (2017)

Context-based Adaptive Binary Arithmetic Coding (CABAC) is the entropy coding module in the HEVC/H.265 video coding standard. As in its predecessor, H.264/AVC, CABAC is a well-known throughput bottleneck due to its strong data dependencies. Besides other optimizations, the replacement of the context model memory by a smaller cache has been proposed for hardware decoders, resulting in an improve...

Geregelte Strömungskontrolle einer Statorkaskade mit Seitenwand- und Hinterkantenaktuation

Kiesner, Matthias (2018)

Die Steigerung des Wirkungsgrades von Gasturbinen ist ein wichtiges Entwicklungs- und Forschungsziel. Durch die große Stückzahl der weltweit im Energie- und Transportsektor eingesetzten Gasturbinen ist das Potential für eine Reduktion der Treibhausgasemissionen enorm. Aktuell wird eine neue Technologie erforscht, die einen Wechsel von der konventionellen isobaren Verbrennung zu einer isochoren ...

The role of efficient technology for achieving climate change mitigation and development

Ward, Hauke (2018)

This thesis is motivated by a potential conflict within the sustainable development goals, which refers to climate change mitigation and development. This conflict is of special relevance for developing countries. On the one hand these are projected to be most severely impacted by climate change. On the other hand fast economic development, connected to emitting greenhouse gases, could help sub...

Endophytes as source of polypeptide and polyketide antibiotics fengycin and bacillaene

Glazyrina, Julia (2018)

Endophytic bacteria, which populate plant tissues, can influence physiological processes in plants. They also have antagonistic effects against many phytopathogens. Utilization of these bacteria as a biological agent for protection of plants is an environmentally friendly alternative to chemical methods. Moreover, since plants belong to the eukaryotic organisms, antibiotics produced by endophyt...

Wissenschaftskulturen im Dialog – Wissenschaftsrezeption und Wissenschaftsmoderation im Zeitalter global verfügbarer Online-Publikationen

Otto, Gabriele E. (2018)

Diese Arbeit wendet sich Fragen nach den Bedingungen für eine pluri-kulturelle Nutzung wissenschaftlichen Wissens im Internet zu. Ausgehend von kulturellen Prägungen der Wissenschafts- und akademischen Kulturen in Indonesien und in Deutschland aus der Sicht der DaF-Didaktik und der Anthropologie werden anhand von exemplarischen Untersuchungen an Bachelor-Arbeiten zur Literaturwissenschaft aus I...

Graphical visualization of sustainable manufacturing aspects for knowledge transfer to public audience

Wang, Wei Min ; Wolter, Lars ; Lindow, Kai ; Stark, Rainer (2015)

Sustainability is characterized by complex interplay between economic, environmental and social aspects and a temporal dimension. The public perception is often mistakenly limited to single aspects due to deliberated influence by marketing or misuse. Reliable scientific articles usually address expert audience only. To create a broad public understanding knowledge has to be available and compre...

Apples and oranges : a methodological framework for basic research into audiovisual perception

Maempel, Hans-Joachim (2017)

In recent years, increased efforts have been made to investigate the various aspects of audiovisual perception. In general, highly-specific variables are considered, and specific paradigms and methods are applied. Thus, connecting results of various experiments is not always possible in a systematic manner, and several related research fields still lack comprehensive theories and corresponding ...