Institut für Wirtschaftsinformatik

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A market-based smart grid approach to increasing power grid capacity without physical grid expansion
(Springer, 01.02.2018) Bagemihl, Joachim; Boesner, Frank; Riesinger, Jens; Künzli, Michael; Wilke, Gwendolin; Binder, Gabriela; Wache, Holger; Laager, Daniel; Breit, Jürgen; Wurzinger, Michael; Zapata, Juliana; Ulli-Beer, Silvia; Layec, Vincent; Stadler, Thomas; Stabauer, Franz [in: Computer Science - Research and Development]
The continuous increase of competitiveness of renewable energy in combination with the necessity of fossil fuel substitution leads to further electrification of the global energy system and therefore a need for large-scale power grid capacity increase. While physical grid expansion is not feasible for many countries, grid-driven energy management in the Smart Grid often interferes in customer processes and free access to the energy market. The paper solves this dilemma by proposing a market-based load schedule management approach that increases power grid capacity without physical grid expansion. This is achieved by allocating for a certain class of non-critical flexible loads called “conditional loads” the currently unused grid capacity dedicated to ensuring N−1 security of supply whereas this security level remains untouched for all critical processes. The paper discusses the necessary processes and technical and operational requirements to operate such a system.
01A - Beitrag in wissenschaftlicher Zeitschrift
A viewpoint-based case-based reasoning approach utilising an enterprise architecture ontology for experience management
(Taylor & Francis, 28.03.2016) Martin, Andreas; Emmenegger, Sandro; Hinkelmann, Knut; Thönssen, Barbara [in: Enterprise Information Systems]
The accessibility of project knowledge obtained from experiences is an important and crucial issue in enterprises. This information need about project knowledge can be different from one person to another depending on the different roles he or she has. Therefore, a new ontology-based case-based reasoning (OBCBR) approach that utilises an enterprise ontology is introduced in this article to improve the accessibility of this project knowledge. Utilising an enterprise ontology improves the case-based reasoning (CBR) system through the systematic inclusion of enterprise-specific knowledge. This enterprise-specific knowledge is captured using the overall structure given by the enterprise ontology named ArchiMEO, which is a partial ontological realisation of the enterprise architecture framework (EAF) ArchiMate. This ontological representation, containing historical cases and specific enterprise domain knowledge, is applied in a new OBCBR approach. To support the different information needs of different stakeholders, this OBCBR approach has been built in such a way that different views, viewpoints, concerns and stakeholders can be considered. This is realised using a case viewpoint model derived from the ISO/IEC/IEEE 42010 standard. The introduced approach was implemented as a demonstrator and evaluated using an application case that has been elicited from a business partner in the Swiss research project.
01A - Beitrag in wissenschaftlicher Zeitschrift
Business Process Flexibility and Decision-aware Modeling - The Knowledge Work Designer
(Springer, 2016) Hinkelmann, Knut; Karagiannis, Dimitris; Mayr, Heinrich C.; Mylopoulos, John [in: Domain-Specific Conceptual Modeling]
This chapter describes the Knowledge Work Designer, a modelling method for knowledge work. It is based on two principles: (1) the separation of business logic and process logic and (2) the support of both structures and unstructured knowledge. Process logic can be represented in a structured way in BPMN and in a non-structured way with CMMN. For real processes there is no strict separation between structured processes and cases. Therefore the Knowledge Work Designer offers a deep integration of BPMN and CMMN. Business logic can be represented in a structured way using decision tables. Unstructured business logic can be represented in documents. The separation of business logic and process logic allows for simpler process model and easier maintenance.
04A - Beitrag Sammelband
Challenges, opportunities and application fields of quantum computing - an introductory overview
(Association Information et Management, 2022) Kech, Benjamin; Schneider, Bettina; Gachnang, Phillip; Azan, Wilfrid
This paper elaborates on the technology of quantum computing. It is aimed at people new to this field and introduces characteristics of quantum computing along with comparisons to classical computing. Furthermore, the paper describes the challenges and opportunities of quantum computing. In addition, applications have been explored where quantum computing could create value for businesses. The findings include three categories. First, quantum computing might make a difference in simulating nature, which was also the initial idea that led to the invention of quantum computing. Second, quantum computing could benefit the category of machine learning. Last, optimization problems will take advantage of quantum computing. It is concluded that quantum computing is still in its early stages and there are many challenges to overcome ‚ in particular the challenge of error correction. To gain in the foreseeable future from the advantages that quantum computing pledges, more advances in research have to be made to have a fault-tolerant system. A fault-tolerant quantum computer is a promising technology that could create significant value for various branches, such as finance.
04B - Beitrag Konferenzschrift
How WEIRD is HCI?: Extending HCI Principles to Other Countries and Cultures
(ACM, 2015) Sturm, Christian; Oh, Alice; Linxen, Sebastian; Abdelnour Nocera, Jose; Dray, Susan; Reinecke, Katharina [in: Proceedings of the 33rd Annual ACM Conference Extended Abstracts on Human Factors in Computing Systems]
A large majority of articles published at prominent HCI venues such as CHI and CSCW reports on studies with WEIRD (Western, Educated, Industrialized, Rich, and Democratic) participants, ignoring that the results might not apply to other subject populations. This workshop aims to have the following two main outcomes: (1) A list of major principles that HCI researchers often build on and that are unlikely to apply to users in other countries and cultures. (2) An action plan that describes how we can extend these previous findings, such as by collaborating across countries and cultures, conducting large-scale online experiments, or creating a culture of replications and extensions with more diverse subject populations. Furthermore, the workshop aims to establish an interest group with the goal to improve the external validity of HCI research and to inform the design of further research studies in this area.
04B - Beitrag Konferenzschrift
Kulturelle Unterschiede bei mentalen Modellen für Webobjekte
(31.03.2014) Heinz, Silvia; Linxen, Sebastian
Webseiten, die basierend auf den mentalen Modellen der Nutzer gestaltet wurden, sind für Nutzer leichter zu bedienen. Werden Webelemente entsprechend platziert, d.h. entsprechend den Erwartungen der Nutzer, können Fehler vermieden und die Effizienz der Interaktion mit Webseiten gesteigert werden. Bisherige Studien haben Daten über mentale Modelle verschiedener Arten von Webseiten gesammelt, jedoch stützen sich die Erkenntnisse dieser Studien auf Untersuchungen mit spezifischen Zielgruppen und berücksichtigen den Einfluss kultureller Aspekte nicht. Darüber hinaus hat sich die Gestaltung von Webseiten im Laufe der Zeit verändert und die erhobenen mentalen Modelle könnten veraltet sein. Um diese Einschränkungen zu beheben, wurde eine Onlinestudie durchgeführt und die mentalen Modelle der Nutzer verschiedener Kulturen und Länder erfasst. Die Studienteilnehmer wurden gebeten, mit den gängigsten Webelementen (z.B. Navigation, Suchfeld) die Struktur einer für sie typischen Unternehmenswebseite, eines Nachrichtenportals und eines Online-Shops zu skizzieren. Diese mentalen Modelle wurden verglichen und länderspezifische sowie kulturell bedingte Unterschiede herausgearbeitet. Die Erfassung aktueller mentaler Modelle unter Berücksichtigung kultureller Unterschiede bietet die Möglichkeit, eine Vorlage für die Platzierung von Webelementen zu schaffen, die beim Design von erfolgreichen, länderspezifisch angepassten Websites zu Hilfe genommen werden kann.
06 - Präsentation
Kulturelle Unterschiede bei mentalen Modellen für Webobjekte
(25.09.2014) Heinz, Silvia; Linxen, Sebastian
Webseiten, die basierend auf den mentalen Modellen der Nutzer gestaltet wurden, sind für Nutzer leichter zu bedienen. Werden Webelemente entsprechend platziert, d.h. entsprechend den Erwartungen der Nutzer, können Fehler vermieden und die Effizienz der Interaktion mit Webseiten gesteigert werden. Bisherige Studien haben Daten über mentale Modelle verschiedener Arten von Webseiten gesammelt, jedoch stützen sich die Erkenntnisse dieser Studien auf Untersuchungen mit spezifischen Zielgruppen und berücksichtigen den Einfluss kultureller Aspekte nicht. Darüber hinaus hat sich die Gestaltung von Webseiten im Laufe der Zeit verändert und die erhobenen mentalen Modelle könnten veraltet sein. Um diese Einschränkungen zu beheben, wurde eine Onlinestudie durchgeführt und die mentalen Modelle der Nutzer verschiedener Kulturen und Länder erfasst. Die Studienteilnehmer wurden gebeten, mit den gängigsten Webelementen (z.B. Navigation, Suchfeld) die Struktur einer für sie typischen Unternehmenswebseite, eines Nachrichtenportals und eines Online-Shops zu skizzieren. Diese mentalen Modelle wurden verglichen und länderspezifische sowie kulturell bedingte Unterschiede herausgearbeitet. Die Erfassung aktueller mentaler Modelle unter Berücksichtigung kultureller Unterschiede bietet die Möglichkeit, eine Vorlage für die Platzierung von Webelementen zu schaffen, die beim Design von erfolgreichen, länderspezifisch angepassten Websites zu Hilfe genommen werden kann.
06 - Präsentation
Mental Models for Web Objects in Different Cultural Settings
(ACM, 2014) Linxen, Sebastian; Heinz, Silvia; Müller, Livia; Tuch, Alexandre Nicolas; Opwis, Klaus [in: CHI '14 Extended Abstracts on Human Factors in Computing Systems]
"Know your users!" A short request but a challenging one. Studies have shown that the positioning of web objects according to the users' mental models can prevent errors and increase the efficiency of interaction. Therefore an important aspect of the design of websites is to take the expectations of the users into account. However the results of these studies are based on research with limited target groups and neglected to consider cultural aspects. To approach this issue the currently being conducted study aims primarily to (1) identify and visualize mental models for different websites types for different countries, (2) highlight differences and similarities in the mental models of the subjects based on their nationality and (3) show the influence of experience with international websites on the mental models of the user. The results gained will be helpful during the design and localization process for international target groups.
04B - Beitrag Konferenzschrift
Poster abstract: SmartStability. A multi-agent simulation environment for flexibility trading in households
(Springer, 01.02.2018) Wache, Holger; Künzli, Michael; Schulz, Nicola; Bichsel, Jürg; Hall, Monika [in: Computer Science - Research and Development]
The increasing number of volatile energy sources, such as solar power plants, challenges the power network operators, the energy brokers as well as the electricity market actors. In this work, a multi-agent based approach will be introduced that allows multiple households to trade flexibilities, on top of the usual selling of produced energy to the paying consumer. Flexibility trading allows different optimisations for different actors. They can slightly shift their electricity consumption, e.g. by turning boilers on/off, to optimise the system (e.g. follow a predefined schedule). Simulation results indicate that a flexibility market consisting of only few households can already help to optimise the system.
01A - Beitrag in wissenschaftlicher Zeitschrift
Shaping aggregated load profiles based on optimized local scheduling of home appliances
(Springer, 01.02.2018) Hunziker, Christoph; Schulz, Nicola; Wache, Holger [in: Computer Science - Research and Development]
We present a new method to control an aggregated electric load profile by exploiting the flexibilities provided by residential homes. The method is based on a common energy price combined with inclining block rates, broadcasted to all households allowing them to minimize their energy provisioning cost. The distributed home energy management systems receive the price signal and use mixed integer linear programming for optimal scheduling of load, storage, and generation devices. The method provides excellent scalability as well as autonomy for home owners and avoids load synchronization effects. As proof of concept, an optimization algorithm for determining a day-ahead price is applied in two case studies. An excellent conformance between a given reference load profile and the resulting aggregated load profile of all households is demonstrated.
01A - Beitrag in wissenschaftlicher Zeitschrift
Technical Validation of the RLS Smart Grid Approach to increase Power Grid Capacity without Physical Grid Expansion
(SciTePress, 05/2019) Christen, Ramón; Layec, Vincent; Wilke, Gwendolin; Wache, Holger; Donnellan, Brian; Klein, Cornel; Helfert, Markus [in: Smartgreens 2019. 8th International Conference on Smart Cities and Green ICT Systems, Heraklion, Crete, Greece, May 3-5, 2019. ProceedingsHeraklion, Crete, Greece,]
The electrification of the global energy system and the shift towards distributed power production from sus- tainable sources triggers an increased network capacity demand at times of high production or consumption. Existing energy management solutions can help mitigate resulting high costs of large-scale physical grid rein- forcement, but often interfere in customer processes or restrict free access to the energy market. In a preceding paper, we proposed the RLS regional load shaping approach as a novel business model and load management solution in middle voltage grid to resolve this dilemma: market-based incentives for all stakeholders are pro- vided to allow for flexible loads that are non-critical in customer processes to be allocated to the unused grid capacity traditionally reserved for N-1 security of supply. We provide a validation of the technical aspects of the approach, with an evaluation of the day-ahead load forecasting method for industry customers and a load optimization heuristics. The latter is tested by a simulation run on a scenario of network branch with provoked capacity bottlenecks. The method handles all provoked critical network capacity situations as expected.
04B - Beitrag Konferenzschrift
Ungenutzte IT-Potenziale im Einkauf
(Verein procure.ch, 09/2012) Tanner, Christian [in: Beschaffungsmanagement]
Die FHNW führte zusammen mit procure.ch erneut eine Studie zum Einsatz von IT in der Beschaffung in Schweizer Grossunternehmen durch. Die 102 teilnehmenden Beschaffungsverantwortlichen aus diversen Branchen geben einen interessanten Einblick in den aktuellen Stand der IT-Nutzung und in geplante Projekte für die weitere Prozessunterstützung.
01B - Beitrag in Magazin oder Zeitung
Was man mit Blockchain nicht machen kann
(Netzmedien, 19.06.2019) Dettling, Walter [in: Netzwoche]
Nach der ersten Begeisterung über Kryptowährungen und Blockchain ist eine gewisse Ernüchterung eingetreten. Im Gegensatz zu Kryptowährungen ist bei den übrigen Blockchain-Anwendungen ist noch keine «Killerapplikation» in Sicht. Grund dafür sind die völlig unterschiedliche Konzeptionen von herkömmlichen Datenstrukturen für Business Applikationen und dem Konzept der Blockchain, welche primär den Schutz der Daten vor Manipulation und die Anonymität gewährleisten.
01B - Beitrag in Magazin oder Zeitung

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Auflistung Institut für Wirtschaftsinformatik nach Schlagwort "004 - Computer Wissenschaften, Internet"

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