Kai von Luck

Kai von Luck
Hochschule für Angewandte Wissenschaften Hamburg | HAW · Department of Computer Science

Professor

About

70
Publications
3,580
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261
Citations

Publications

Publications (70)
Article
This research addresses an interdisciplinary problem area concerning the long-term deployment of socially embedded technology in authentic environments. It concentrates on the case of ambient displays, where long-term research in the real world is still scant and evidentially requires methodological development. This study seeks to advance on this...
Conference Paper
Complex event processing (CEP) systems are typically utilised for smart environments to cope with large numbers of components and events without simultaneously increasing latencies for user interaction. Although CEP systems can simplify the development of components with CEP queries, it remains challenging to debug such complex distributed systems....
Conference Paper
In this paper we explore human-environment interrelationships by utilizing both hybrid materially-oriented approaches and metaphorical representations. Inspired by the 'canary in a coalmine' metaphor we developed a tangible interface to sense the environment and provide a physical experience. The design utilizes life-like characteristics, like shap...
Conference Paper
In this work, we present our approach to analyze physiological data in affective exergames with deep learning algorithms. In previous works, we enhanced a cycling exercise machine to act as a game controller. During a case study, we collected vision-based and physiological data of 25 participants who rode through the designed emotion provoking game...
Conference Paper
Full-text available
Affective application developers often face a challenge in integrating the output of facial expression recognition (FER) software in interactive systems: although many algorithms have been proposed for FER, integrating the results of these algorithms into applications remains difficult. Due to inter-and within-subject variations further post-proces...
Conference Paper
Full-text available
In this paper, we provide insights towards achieving more robust automatic facial expression recognition in smart environments based on our benchmark with three labeled facial expression databases. These databases are selected to test for desktop, 3D and smart environment application scenarios. This work is meant to provide a neutral comparison and...
Conference Paper
Full-text available
In this work we enhance our previously developed analysis method of provoked emotions in facial expressions through the analysis of physiological data. The presented work describes the integration of electrodermal activity, respiration and temperature sensors to enhance our exergaming system for emotional provocation. The combined analysis of facia...
Conference Paper
This paper contributes long-term findings on a custom ambient display solution (Ambient Surfaces) in the informative workspace of co-located agile (Scrum) software development teams. The study is based on the premise that displaying relevant information in a team's informative workspace is beneficial, as it readily provides information of common in...
Conference Paper
Scaling the number of supported users for Massive Multi-User Games (MMOGs) allows more users to experience its content together. Supporting this capability needs consider the chain of all components that constitute the system between the client software of any two users. A large body of research has been created over the last decades on the problem...
Conference Paper
Full-text available
Virtual locomotion is an enabling ability for many tasks in virtual environments (VEs) and denotes the most common form of interaction with VEs. In this paper we present a novel omnidirectional walking-in-place (WIP) locomotion system, which we designed to work in small laboratory environments and is based entirely on consumer hardware. We present...
Conference Paper
Distributed Virtual Environments (DVEs) can handle large numbers of participants by optimizing the routing of state update messages sent to the computer of the individual participant. Often Area of Interest (AoI) management is used to limit the information an avatar can observe and thus the necessary state update messages that are sent to the clien...
Conference Paper
We present a real-time multi-target tracking system that effectively deals with false positive detections. In order to achieve this, we build a novel motion model that treats false positives on background objects and false positives on foreground objects such as shoulders or bags separately. In addition we train a new head detector based on the Agg...
Conference Paper
Large Distributed Virtual Environments (DVEs) combine the interactions of many users, constituting a highly complex distributed system that encompasses of a multitude of heterogeneous computers and communication over varying networks. The size of a DVE is not only measured in the spatial reach of its virtual world, but also the number of concurrent...
Conference Paper
Large Distributed Virtual Environments (DVEs) combine the interactions of many users, constituting a highly complex distributed system that encompasses of a multitude of heterogeneous computers and communication over varying networks. The size of a DVE is not only measured in the spatial reach of its virtual world, but also the number of concurrent...
Conference Paper
The orientation of objects on tables is of fundamental importance for the coordination, communication and proper understanding of content in group work. Similarly, the roles of orientation have to be taken into account when implementing software for multi-touch tabletops. This paper describes a combined approach to help with the orientation of arti...
Article
Ein paar persönliche Reflektionen eines Lehrers über eine Vorlesung Künstliche Intelligenz
Article
Full-text available
In the last several years the hybrid approach to Knowledge Representation has received much attention, because it was felt that one monolithic knowledge representation formalism cannot meet all representational demands. In this paper we will present one particular hybrid knowledge representation system, BACK, concentrating on matters of how to inte...
Article
Hybrid knowledge representation formalisms consist of two or more different subformalisms for representing different kinds of knowledge or knowledge in different kinds of representation formats. For a semantically well-founded hybrid formalism not only a precise semantics for each of the participating subformalisms has to be given but a semantics f...
Book
This volume presents the proceedings of the third workshop on Information Systems and Artificial Intelligence, organized by the German Computer Science Society. The 11 invited contributions by well known researchers and developers working in the fields of databases and knowledge representation systems are centered around the topic of management and...
Conference Paper
Für die effektive Nutzung von Systemen der Künstlichen Intelligenz, deren Performanz ursächlich durch ihre jeweiligen Wissensbasen determiniert werden, rückt die Verwaltung der Wissensbasen immer mehr in den Vordergrund, nachdem lange nur die Ausdrucksstärke von Formalismen und die Realisierung ihrer Inferenzmechanismen die Diskussionen bestimmt ha...
Conference Paper
In diesem Papier wird — ausgehend von den Modellierungen im Rahmen des LILOG-Projektes für das System LEU/2 — eine Reihe von Überlegungen skizziert, die nicht in den Systementwurf eingegangen sind, sondern, wenn überhaupt, sich nur als implizite Annahmen wiederfinden lassen. So wird in LEU/2 implizit von einer Sammlung von Aufgaben der Wissensbasis...
Conference Paper
The LILOG system under development at IBM Germany is a text understanding system with a question/answering component for proving successful text processing. The texts under investigation are non-technical texts understandable for ‘normal people’ with commonsense knowledge. As well known in AI, text understanding systems require background knowledge...
Conference Paper
The meaning of text is strongly determined by its context. The clarification of meaning therefore implies the elaboration of the context in which the text understanding task is going to run. The elaboration of the context results in our case in a scenario which determines the decisions for the domain of LEU/2. So to present the domain for LEU/2 fir...
Conference Paper
Im Projekt EXCEPT (Expert system for Computer-aided Environmental Planning Tasks) wird ein Expertensystem entwickelt, das die Durchführung von Umweltverträglichkeitsprüfungen im kommunalen Bereich auf inhaltlich — methodischer Ebene unterstützen soll. Der Schwerpunkt des Systems liegt dabei auf der Unterstützung der Umweltbewertung, insbesondere un...
Article
This paper introduces the knowledge representation language L LILOG . The language is being developed in the framework of the LILOG project and serves for modelling the semantic background knowledge of the LILOG natural language understanding system. Moreover, it is also used as the target language for representing information extracted from German...
Conference Paper
In dieser Arbeit wird die Rekonstruktion von Aspekten eines Gegenstandsbereichs des LILOG-Systems vorgestellt. Im Vordergrund steht hier die Rekonstruktion eines Teils des Weltwissens, das für das Verstehens eines natürlichsprachlichen Textes notwendig ist. Diese Rekonstruktion umfaßt die in diesem Text auftretenden Referenzobjekte und deren zugehö...
Book
Dieser Band enthält die Unterrichtsmaterialien zur KIFS-89, der siebten in der Reihe von Frühjahrsschulen über Künstliche Intelligenz, die seit 1982 von dem Fachausschuß 1.2. der Gesellschaft für Informatik (GI) veranstaltet werden. Diese Frühjahrsschulen bieten sowohl Einführungen in repräsentative Teilbereiche der Künstlichen Intelligenz als auch...
Conference Paper
Hybrid knowledge representation formalisms consist of two or more different subformalisms forrepresenting different kinds of knowledge or knowledge in different kinds of representation formats. Fora semantically well-founded hybrid formalism not only a precise semantics for each of the participatingsubformalisms has to be given but a semantics for...
Conference Paper
In diesem Artikel sollen einige Aspekte neuerer Wissensrepräsentationsformalismen der Künstlichen Intelligenz an Hand einer unter dem Namen KL-ONE bekannt gewordenen Formalismenfamilie dargestellt und diskutiert werden.
Conference Paper
In the last several years the hybrid approach to Knowledge Representation has received much attention, because it was felt that one monolithic knowledge representation formalism cannot meet all representational demands. In this paper we will present one particular hybrid knowledge representation system, BACK, concentrating on matters of how to inte...
Conference Paper
The Number Restriction of Roles, first proposed in KL-ONE, gives a Semantic Network formalism great expressive power. On the other hand, hybrid systems having such features as part of their terminological knowledge representation formalism have great difficulties in using these Number Restrictions for inferences and consistency checking in their as...
Conference Paper
The knowledge representation system BACK, a descendant of the ‘New Implementation of SRL’, is described focussing on the problems of how to achieve a consistent knowledge base and how to cope with incomplete knowledge [1].
Conference Paper
This paper presents an approach to the declarative representation of dynamic control knowledge for planning purposes. N.N. is a system with complex plan knowledge to guide its search. By using fairly simple techniques the semantics of this knowledge have been incorporated into N.N.’s knowledge bases, thus rendering unnecessary any procedural interp...
Conference Paper
Die semantische Repräsentationssprache SRL ist ein logik-orientiertes Wissensrepräsentationskonzept, das seit einigen Jahren an der TU Berlin entwickelt wird. Diese Arbeit beschreibt Modifikationen und Erweiterungen von SRL und gibt eine funktionale Sicht der neuen Implementation von SRL. Insbesondere wird ein Systemkern beschrieben, der einen kons...
Conference Paper
An overview of a planning system for chess called N.N. is given. Our special view of planning as applying flexible action scripts to given situations and the low level planning mechanisms for concretizising these scripts is explained. The separation of plan knowledge and world knowledge is pointed out and the interaction between these knowledge sou...
Conference Paper
At least since 1973/74, when H.Berliner published his articles, it became apparent to almost every chess programmer that conventional Shannontype chess programs suffer from structural shortcomings. Research on removal or reduction of these weaknesses proceeds into three general directions.
Article
Zusammenfassung Die Ausrichtung von Objekten auf gewöhnlichen Tischen ist von fundamentaler Bedeutung für das richtige Verständnis sowie die Koordination und Kommunikation in Gruppenarbeiten. Ebenso müssen diese Rollen der Ausrichtung bei der Implementierung von Multitouch-Tischen berücksichtigt werden. In dieser Arbeit wird ein kombiniertes Verfah...
Article
Durch den zunehmenden Einsatz von Social Software in Unternehmen (Enterprise 2.0) sehen sich diese mit immer neuen Herausforderungen konfrontiert. Informationen verschwinden oft dauerhaft auf Serversystemen und kommen nur mit Hilfe aktiver Suchen wieder zum Vorschein. Einen möglichen Lösungsansatz bieten interaktive und ubiquitäre Benutzungsschnitt...

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