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- KonferenzbeitragA Risk Management for Agent-based Control of Ancillary Service Provision from Distributed Energy Resources in Smart Grids(Proceedings of the 28th Conference on Environmental Informatics - Informatics for Environmental Protection, Sustainable Development and Risk Management, 2014) Schnabel, Sabrina-Cynthia; Appelrath, H.-Jürgen; Lehnhoff, Sebastian; Tröschel, MartinWith increasing shares of renewable power generation, conventional power generation from largescale and highly predictable fossil power plants decreases. Reliably substituting these plants depends on distributed energy resources (DER) being able to provide ancillary services such as frequency and voltage control that are necessary for a reliable and stable power supply. In this paper, we present first concepts regarding an agent-based approach for a stable and reliable control of ancillary service provision from DER, and we outline research challenges regarding the management of the economical risk an operator faces when trading active power and ancillary services from DER at energy markets.
- KonferenzbeitragAligning IT Architecture Analysis and Security Standards for Smart grids(Proceedings of the 28th Conference on Environmental Informatics - Informatics for Environmental Protection, Sustainable Development and Risk Management, 2014) Schlegel, Stefanie; Rosinger, Christine; Uslar, MathiasIn this paper, an approach using the European Smart Grid Architecture Model (SGAM), in the context of the NISTIR 7628, is presented. Research has shown that both models and methodologies have particular impact, but have not yet been put into mutual context. The combination of these models makes it possible for US smart grid experts to re-use the SGAM model and its benefits, and vice versa European stakeholders are encouraged to use the security analysis framework from NIST. Within this paper, we briefly introduce the methodologies including their strengths and fallbacks. We outline the necessity to make them interoperable and aligning them. Finally, the logical interface framework from NISTIR 7628 is mapped onto the SGAM and its planes, domains and zones, bridging the previous gap.
- KonferenzbeitragModel-based Energy Consumption Prediction for Mobile Application(Proceedings of the 28th Conference on Environmental Informatics - Informatics for Environmental Protection, Sustainable Development and Risk Management, 2014) Willnecker, Felix; Brunnert, Andreas; Krcmar, HelmutInvestigating the energy consumption of mobile applications (apps) is becoming a growing software engineering challenge due to the limited battery lifetime of mobile devices. Energy consumption is defined as the power demand integrated over time. Profiling the power demand of an app is a time consuming activity and the results are only valid for the target hardware used during the measurements. The energy consumption is influenced by the resource demands of an app, the hardware on which the app is running, and its workload. This work adapts resource profiles for enterprise applications to predict the energy consumption of mobile apps without the need to own a physical device. Resource profiles are models that represent all aspects influencing the energy consumption of an app. They can be used to predict the energy consumption for different hardware devices and evaluate the overall efficiency of an app. Moreover, the workload can be changed so that the impact of different usage patterns can be investigated. These capabilities lay the foundation for a platform-independent way of quantifying the energy consumption of mobile apps
- KonferenzbeitragOn the Impact of User Feedback on Energy Consumption(Proceedings of the 28th Conference on Environmental Informatics - Informatics for Environmental Protection, Sustainable Development and Risk Management, 2014) Bunse, ChristianThe energy consumption of mobile devices is of increasing importance for users, developers and vendors. Frequent recharging cycles have an impact onto the mobility of a device and thus, on user experience. While hardware and software are known to have an impact on energy consumption, user behaviour (when and how a device is used) is often not in the focus of attention. Research in on “smart-metering” has shown that user behaviour is a non-negligible impact factor. This paper reports about the results of an ongoing study on the impact of user feedback onto the energy consumption of mobile devices (i.e. Smartphones). The hypothesis being, that the frequent provision of energy-related feedback on user actions will significantly reduce energy utilization. First results support this hypothesis and indicate that feedback frequency and feedback clearly linked to specific user activities are key in this regard.
- KonferenzbeitragContexto: Leveraging Energy Awareness in the Development of Context-Aware Applications(Proceedings of the 28th Conference on Environmental Informatics - Informatics for Environmental Protection, Sustainable Development and Risk Management, 2014) Schirmer, Maximilian; Bertel, Sven; Pencke, JonasWe introduce a new context classification and recognition framework for the development and deployment of mobile, context-aware applications. The framework is complemented with an energy calculator that specifically assists mobile developers in estimating the energy footprint of context-aware applications during the development process with the framework. The framework abstracts from the raw context information gathering, allows for sensor fusion, enables the prediction of custom and higher-level contexts, and provides for context sharing.
- KonferenzbeitragUsability-Quiz: Die Begriffswelt der Usability durch ein Lernspiel vermitteln(Proceedings of the 28th Conference on Environmental Informatics - Informatics for Environmental Protection, Sustainable Development and Risk Management, 2014) Hemke, Felix; Meyer, Herbert A.; Hühne, Knut; Schneider , Maximilian; Wohlgemuth, VolkerMit dem Glossar zur Basiszertifizierung CPUX-F (Certified Professional for Usability and User Experience – Foundation Level) des UXQB steht eine Sammlung von Definitionen zu grundlegenden Begriffen und Konzepten aus dem Fachgebiet Usability und User Experience zur Verfügung. Zur Erleichterung der Auseinandersetzung mit dieser Begriffswelt wurde ein webbasiertes Hypertextsystem erzeugt, das wahlweise über Smartphone, Tablet oder PC benutzt werden kann. Um den Lernanreiz zu erhöhen, wurde zusätzlich ein Frage-und-Antwort-Spiel mit einer Highscore-Liste entwickelt. Dieses so genannte „Usability-Quiz“ wird im Rahmen dieses Beitrags vorgestellt.
- KonferenzbeitragCertifying Energy Efficiency of Android Applications(Proceedings of the 28th Conference on Environmental Informatics - Informatics for Environmental Protection, Sustainable Development and Risk Management, 2014) Meier, Johannes; Ostendorp, Marie-Christin; Jelschen, Jan; Winter, AndreasWhile smartphone and tablet functionality is increasing, battery runtime goes down. Both users and software developers are not always aware of the energy consumed by applications. Without this information, users cannot choose energy-efficient apps to prevent battery drain. Awareness of energy consumption would also entice app developers to implement more energy-efficient apps to remain competitive. This paper presents a certification process and corresponding Android tool support for comparing apps regarding energy efficiency. It is demonstrated using notepad apps.
- KonferenzbeitragFlickering Events in Wind and Solar Power(Proceedings of the 28th Conference on Environmental Informatics - Informatics for Environmental Protection, Sustainable Development and Risk Management, 2014) Lohmann, Gerald; Tabar, M. Reza Rahimi; Milan, Patrick; Anvari, Mehrnaz; Wächter, Matthias; Lorenz, Elke; Heinemann, Detlev; Peinke, JoachimThis paper reports stochastic properties of renewable wind and solar energy resources by studying their conditional probability distribution functions (cpdf) in different time lags. The empirical results are obtained for data of global horizontal irradiance measured by a single sensor and the power output of a single wind turbine, as well as for an averaged solar sensor field and an aggregated wind farm. Moreover, the dependency of the time series' spread on the solar elevation angle, and the wind speed, respectively, is investigated in order to assess the risk of flickering in relation to these variables. The results show that the conditional distribution functions deviate strongly from Gaussian statistics and possess positive skewness, while the risk of flickering events in wind power and solar irradiance generally increases with wind speed and solar elevation, respectively, for single point measurements. Spatial averaging leads to flickering risk reduction.
- KonferenzbeitragMobile technologies and personalized environmental information for supporting sustainable mobility in Oslo: The Citi-Sense-MOB approach(Proceedings of the 28th Conference on Environmental Informatics - Informatics for Environmental Protection, Sustainable Development and Risk Management, 2014) Castell, Nuria; Liu, Hai-Ying; Kobernus, Mike; Berre, Arne J.; Noll, Josef; Cagatay, Erol; Gangdal, ReidunUrban and peri-urban growth is increasing world-wide and Europe is now one of the most urbanized continents in the world. Oslo is one of the fastest growing cities in Europe. This creates pressure on its infrastructure, including traffic and environmental urban quality. Additionally, vehicular traffic is a major contributor to CO2 emissions, which impacts climate change. It is recognized that air quality is a major factor for human health however, although different measures have been implemented, improving air quality and lowering carbon emissions still remains an unsolved problem in Oslo. The main objective of Citi-Sense-MOB is to demonstrate how using innovative technology to continuously measure environmental data at the road level combined with innovative Information and Communication Technologies (ICT) can help to create a dynamic city infrastructure for realtime city management, access to personalized environmental information and sustainable development. The output from the project will be mobile services for citizens and authorities based on the use of near real-time data on air quality and CO2 emissions at road level. The societal importance of these services arises from a need to mitigate the effects of air pollution and climate change, and to combat respiratory diseases related to traffic-related air pollution. In order to motivate citizens to use the information generated by the project, Citi-Sense-MOB will provide them with personalized environmental information, as for instance alerting systems when pollution levels exceed a critical threshold. Customized information will also be provided to authorities consisting of detailed air quality maps at high spatial resolution and an evaluation of possibilities to reduce CO2 emissions by improving driving practices in public urban fleets.
- KonferenzbeitragSustainability Aware Business Process Management using XML-Nets(Proceedings of the 28th Conference on Environmental Informatics - Informatics for Environmental Protection, Sustainable Development and Risk Management, 2014) Betz, StefanieThis paper gives a short overview about sustainability aware process management using XMLnets. Sustainability management is one of the upcoming movements in the 21st century. Communal and private organizations are interested in finding and using “sustainable” solutions and practices. But, there is a lack of available solutions and practices. In the 21st century also, software systems and their underlying business processes are ubiquitous and fundamental for most of the organizations of the industrial society. But, until now, sustainability is not sufficiently considered by business process engineering. Hence, to support the transition to sustainability, one must have sustainability (aspects) integrated into the business processes. Consequently, in this paper a holistic approach is presented to support sustainability aware business process management. To realize such an approach, sustainability aspects must be integrated into the business processes life cycle. Thus, first to assist the stakeholder when modelling, designing, executing, and monitoring the business processes a process model is developed and explained. Second, sustainability aspects are conceptualized and integrated in a business process modelling language.