Refine
Year of publication
- 2017 (322) (remove)
Document Type
- Conference Proceeding (92)
- Article (reviewed) (46)
- Bachelor Thesis (38)
- Article (unreviewed) (33)
- Part of a Book (23)
- Working Paper (18)
- Book (17)
- Other (11)
- Contribution to a Periodical (9)
- Master's Thesis (9)
Conference Type
- Konferenzartikel (62)
- Konferenz-Abstract (22)
- Konferenz-Poster (3)
- Sonstiges (3)
- Konferenzband (2)
Keywords
- CST (7)
- HF-Ablation (7)
- CRT (5)
- Ermüdung (4)
- Games (4)
- Gamification (4)
- Social Media (4)
- Computer Games (3)
- Computerspiele (3)
- Controlling (3)
Institute
- Fakultät Medien und Informationswesen (M+I) (bis 21.04.2021) (115)
- Fakultät Elektrotechnik und Informationstechnik (E+I) (bis 03/2019) (92)
- Fakultät Maschinenbau und Verfahrenstechnik (M+V) (65)
- Fakultät Wirtschaft (W) (46)
- ivESK - Institut für verlässliche Embedded Systems und Kommunikationselektronik (13)
- INES - Institut für nachhaltige Energiesysteme (12)
- ACI - Affective and Cognitive Institute (8)
- IfTI - Institute for Trade and Innovation (6)
- WLRI - Work-Life Robotics Institute (5)
- Zentrale Einrichtungen (5)
Open Access
- Closed Access (131)
- Open Access (131)
- Bronze (7)
- Closed (6)
- Diamond (1)
- Gold (1)
- Grün (1)
Online-Marketing-Controlling
(2017)
Die Unternehmenslandschaft, nicht nur in Deutschland, sondern weltweit, wird aktuell gerade in all ihren Bereichen vor allem von der stetig wachsenden Welle der Digitalisierung nachhaltig geprägt. Die ganzen Auswirkungen davon in der Zukunft lassen sich im Augenblick oft noch nicht einmal ansatzweise erahnen. Das hier zu beobachtende Collingridge-Dilemma besteht darin, dass Wirkungen nicht leicht prognostiziert werden können, solange die betreffenden Technologien noch nicht ausreichend entwickelt und in Folge entsprechend weit verbreitet sind. Deren Gestalten beziehungsweise gewünschtes Ändern und Anpassen werden jedoch umso schwieriger, je intensiver die Technologien bereits verwurzelt sind. Die Digitalisierung stellt dabei nur einen, wenn auch wohl gravierendsten Aspekt derartiger Veränderungserscheinungen beziehungsweise -herausforderungen dar. Der Wandel des wirtschaftlichen und politischen Umfeldes auf globaler Ebene ist unumstritten. Zugleich ist eine zunehmende Komplexität festzustellen, die es erschwert, im Sinne einer verlässlichen Planung heute solide fundierte Entscheidungen für die zukünftige Entwicklung zu treffen.
The aim of the smart grid is to achieve more efficient, distributed and secure supply of energy over the traditional power grid by using a bidirectional information flow between the grid agents (e.g. generator node, customer). One of the key optimization problems in smart grid is to produce power among generator nodes with a minimum cost while meeting the customer demand, known as Economic Dispatch Problem (EDP). In recent years, many distributed approaches to solve EDP have been proposed. However, protecting the privacy-sensitive data of individual generator nodes has been largely overlooked in the existing solutions. In this work, we show an attack against an existing auction-based EDP protocol considering a non-colluding semi-honest adversary. We briefly introduce our approach to a practical privacy-preserving EDP solution as our work in progress.
Biological in situ methanation: Gassing concept and feeding strategy for enhanced performance
(2017)
The expansion of fluctuating renewable electricity production from wind and solar energy requires huge storage capacities. Power-to-gas (PtG) can contribute to tackle that issue via a two-step process, the electrolytic production of hydrogen and a subsequent methanation step (with additional CO2). The resulting fully grid compatible methane, also known as synthetic natural gas (SNG), can be both stored and transported in the vast existing natural gas infrastructure.
To overcome current major drawbacks of PtG, the relatively low efficiency and the high costs, we developed an improved method for the methanation step. In our approach we use a further development of the biological in situ methanation of hydrogen in biogas plants. Because this strategy uses directly internal residual CO2 from the biogas process in the biogas plant, you neither need additional external CO2 nor special reactors. Thus, PtG is combined with the production of an upgraded highly methane rich raw biogas.
However, the low solubility of hydrogen in aqueous solutions and the exploitation of the maximum biological production rates are still an engineering challenge for high performance biological in situ methanation.
In our experiments a setup with membrane gassing turned out to be most promising to ensure a sufficient gas liquid mass transfer of the hydrogen. The monitoring of hydrogenotrophic and aceticlastic archaea showed some adaption of these microbial subgroups to the hydrogen feed.
In order to achieve high methane concentrations of more than 90 % in the raw biogas a CO2-controlled hydrogen feed flow rate is suggested. For methane concentrations lower than 90 % simple current controlled hydrogen supply can be applied.