OPUS 4 | Search

Frequenzmessung an Motoren und Frequenzumformern (Frequency Measurement of Motors and Frequency Converters) (2002)

Zhongdong Liu Jörg Himmel Karl-Walter Bonfig

In modernen Prüffeldern zur Warenendkontrolle dienen halbleitergesteuerte Frequenzumformer zur Einstellung der Drehzahl. Diese Systeme verursachen erhebliche Störungen der Strom- und Spannungssignale. Aus diesen Signalen müssen alle elektrischen Kenngrößen berechnet werden. Eine besondere Bedeutung haben dabei die Frequenz und Phasenlage. In diesem Beitrag wird ein mathematischer Algorithmus vorgestellt, der zur Berechnung von Frequenz und Phasenlage bei guter Unterdrückung dieser Störungen eingesetzt werden kann.

Positive Computing - A New Trend in Business and Information Systems Engineering? (2015)

Jan M. Pawlowski Sabrina C. Eimler Marc Jansen Julia Stoffregen Stefan Geisler Oliver Koch Gordon Müller Uwe Handmann

Dynamic Neural Fields as Building Blocks of a Cortex-Inspired Architecture for Robotic Scene Representation (2011)

Stephan K. U. Zibner Faubel Christian Ioannis Iossifidis Gregor Schoner

Based on the concepts of dynamic field theory (DFT), we present an architecture that autonomously generates scene representations by controlling gaze and attention, creating visual objects in the foreground, tracking objects, reading them into working memory, and taking into account their visibility. At the core of this architecture are three-dimensional dynamic neural fields (DNFs) that link feature to spatial information. These three-dimensional fields couple into lower dimensional fields, which provide the links to the sensory surface and to the motor systems. We discuss how DNFs can be used as building blocks for cognitive architectures, characterize the critical bifurcations in DNFs, as well as the possible coupling structures among DNFs. In a series of robotic experiments, we demonstrate how the DNF architecture provides the core functionalities of a scene representation.

Gesichtserkennung auf mobilen Roboterplattformen zu dem Verbundvorhaben "DESIRE - Deutsche Servicerobotik-Initiative" (2010)

Michael Dose Uwe Handmann

Schlussbericht ; Laufzeit des Vorhabens/Berichtszeitraum: 01.10.2005-30.11.2009 Auch als elektronische Ressource vorh. Förderkennzeichen BMBF 01IME01K [richtig] - 01IMEO1K [falsch]. - Verbund-Nr. 01042153. - Engl. Berichtsbl. u.d.T.: Face recognition on mobile robot plattforms. - Literaturverz. Bl. 32 Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden

What if I Lost it? When the Mere Imagination of Smartphone Absence Causes Anxiety (2018)

Tania R. Nuñez Sabrina Eimler

Verbessertes Phasen-Differenz-Verfahren zur Frequenzmessung gestörter Signale bei kurzer Messzeit (Improved Phase-Difference Method for the Frequency Estimation of Noisy Signals in Short Measurement Time) (2005)

Karl-Walter Bonfig Zhongdong Liu Jörg Himmel

Im vorliegenden Beitrag wird das Phasen-Differenz-Verfahren zur Frequenzmessung der durch Rauschen gestörten Signale vorgestellt. Es wird gezeigt, dass Frequenzausreißer bei Anwendungen dieses Verfahrens entstehen, auch wenn das Signal-zu-Rausch-Verhältnis ausreichend groß ist. Die Ursachen der Frequenzausreißer werden analysiert. Zur Korrektur wird ein Lösungsansatz vorgeschlagen. Im Vergleich mit anderen Verfahren kann das verbesserte Phasen-Differenz-Verfahren die Frequenz der durch Rauschen gestörten Signale mit größerer Genauigkeit und vertretbarem Rechenaufwand berechnen.

Attention and Emotion Based Adaption of Dialog Systems (2013)

Sebastian Hommel Ahmad Rabie Uwe Handmann

Soft competency requirements in requirements engineering, software design, implementation, and testing (2015)

Philipp Holtkamp Jussi P.P. Jokinen Jan M. Pawlowski

Global software development changes the requirements in terms of soft competency and increases the complexity of social interaction by including intercultural aspects. While soft competency is often seen as crucial for the success of global software development projects, the concrete competence requirements remain unknown. Internationalization competency represents one of the first attempts to structure and describe the soft competence requirements for global software developers. Based on the diversity of tasks, competence requirements will differ among the various phases of software development. By conducting a survey on the importance of internationalization competences for the different phases of global software development, we identified differences in terms of competence importance and requirements in the phases. “Adaptability” (of one's working style) and “Cultural Awareness” were the main differences. “Cultural Awareness” distinguishes requirements engineering and software design from testing and implementation while “Adaptability” distinguishes implementation and software design from requirements engineering and testing.

Identifying Socio-Cultural Factors That Impact the Use of Open Educational Resources in Local Public Administrations (2016)

Julia Stoffregen Jan M. Pawlowski Eric Ras Snezana Šćepanović

The goal of this paper is to define relevant barriers to the exchange of Open Educational Resources in local public administrations. Building upon a cultural model, eleven experts were interviewed and asked to evaluate several factors, such as openness in discourse, learning at the workplace, and superior support, among others. The result is a set of socio-cultural factors that shape the use of Open Educational Resources in public administrations. Significant factors are, in this respect, the independent choice of learning resources, the spirit of the platform, the range of available formats and access to technologies. Practitioners use these factors to elaborate on the readiness of public administrations towards the use of open e-Learning systems. To academic debates on culture in e-Learning, the results provide an alternative model that is contextualized to meet the demands of public sector contexts. Overall, the paper contributes to the lack of research about open e-Learning systems in the public sector, as well as regarding culture in the management of learning and knowledge exchange.

Educators' open educational collaboration online: The dilemma of emotional ownership (2017)

Henri Pirkkalainen Jan M. Pawlowski Dimitra Pappa

The open education movement has witnessed ups and downs from initial interest in transparency and openness, followed by a lack of reuse of open educational resources (OER) and the massive boost of interest in massive open online courses (MOOCs). This article addresses educators' online behaviors and perceptions regarding participation in collaborative development of OER in online settings. Using a data-driven approach to study educators' perceptions, this article presents multiple considerations for collaborative OER development and validates a new model explaining educators' intention to participate in collaborative action. The findings reveal the contradictory nature of emotional ownership of knowledge: a critical enabling factor for commitment and a barrier to knowledge exchange in an open and transparent manner. The findings also show how outcome expectations regarding increase in reputation and status in the network do not influence the intention to share knowledge. Further interviews with idea-sharing platform users enable us to explain the favorable settings to resolve the dilemma of emotional ownership. The study contributes not only to further development of the open education movement but also to theory development of educators’ collaborative behaviors online.

Refine

Author

Year of publication

Document Type

Language

Has Fulltext

Keywords

Institute

55 search hits