Search results for: Heiner Stuckenschmidt

Items from 1 to 20 out of 104 results

article

Analyzing real-world SPARQL queries and ontology-based data access in the context of probabilistic data

Joerg Schoenfisch, Heiner Stuckenschmidt

International Journal of Approximate Reasoning > 2017 > 90 > C > 374-388

Handling uncertain knowledge is crucial for modeling many real world domains. Ontologies and ontology-based data access (OBDA) have proven to be versatile methods to capture this knowledge. Multiple systems for OBDA have been developed and there is theoretical work towards probabilistic OBDA, namely identifying efficiently processable queries. These queries are called safe queries. However, there...

article

Overcoming individual process model matcher weaknesses using ensemble matching

Christian Meilicke, Henrik Leopold, Elena Kuss, Heiner Stuckenschmidt, more

Decision Support Systems > 2017 > 100 > C > 15-26

In recent years, a considerable number of process model matching techniques have been proposed. The goal of these techniques is to identify correspondences between the activities of two process models. However, the results from the Process Model Matching Contest 2015 reveal that there is still no universally applicable matching technique and that each technique has particular strengths and weaknesses...

article

Position-aware activity recognition with wearable devices

Timo Sztyler, Heiner Stuckenschmidt, Wolfgang Petrich

Pervasive and Mobile Computing > 2017 > 38 > P2 > 281-295

Reliable human activity recognition with wearable devices enables the development of human-centric pervasive applications. We aim to develop a robust wearable-based activity recognition system for real life situations where the device position is up to the user or where a user is unable to collect initial training data. Consequently, in this work we focus on the problem of recognizing the on-body...

article

Cluster-based hierarchical demand forecasting for perishable goods

Jakob Huber, Alexander Gossmann, Heiner Stuckenschmidt

Expert Systems with Applications > 2017 > 76 > C > 140-151

Demand forecasting is of particular importance for retailers in the context of supply chains of perishable goods and fresh food. Such goods are daily produced and delivered as they need to be provided as fresh as possible and quickly deteriorate. Demand underestimation and overestimation negatively affect the revenues of the retailer. Stock-outs have an undesired impact on consumers while unsold items...

chapter

Online personalization of cross-subjects based activity recognition models on wearable devices

Timo Sztyler, Heiner Stuckenschmidt

2017 IEEE International Conference on Pervasive Computing and Communications (PerCom) > 180 - 189

2017 IEEE International Conference on Pervasive Computing and Communications (PerCom)

Human activity recognition using wearable devices is an active area of research in pervasive computing. In our work, we address the problem of reducing the effort for training and adapting activity recognition approaches to a specific person. We focus on the problem of cross-subjects based recognition models and introduce an approach that considers physical characteristics. Further, to adapt such...

chapter

A smart data annotation tool for multi-sensor activity recognition

Alexander Diete, Timo Sztyler, Heiner Stuckenschmidt

2017 IEEE International Conference on Pervasive Computing and Communications Workshops (PerCom Workshops) > 111 - 116

2017 IEEE International Conference on Pervasive Computing and Communications Workshops (PerCom Workshops)

Annotation of multimodal data sets is often a time consuming and a challenging task as many approaches require an accurate labeling. This includes in particular video recordings as often labeling exact to a frame is required. For that purpose, we created an annotation tool that enables to annotate data sets of video and inertial sensor data. However, in contrast to the most existing approaches, we...

chapter

Domain Adaptation for Automatic Detection of Speculative Sentences

Sanja Stajner, Goran Glavas, Simone Paolo Ponzetto, Heiner Stuckenschmidt

2017 IEEE 11th International Conference on Semantic Computing (ICSC) > 164 - 171

2017 IEEE 11th International Conference on Semantic Computing (ICSC)

The use of speculative, uncertain or vague sentences is common in both spoken and written language. Automatic detection of such sentences plays significant role in natural language processing and social sciences as it could enhance information extraction systems and lead to faster and more reliable analyses in social sciences. However, this problem has only been addressed in biomedical and encyclopedic...

article

Recognizing Grabbing Actions from Inertial and Video Sensor Data in a Warehouse Scenario

Alexander Diete, Timo Sztyler, Lydia Weiland, Heiner Stuckenschmidt

Procedia Computer Science > 2017 > 110 > C > 16-23

Modern industries are increasingly adapting to smart devices for aiding and improving their productivity and work flow. This includes logistics in warehouses where validation of correct items per order can be enhanced with mobile devices. Since handling incorrect orders is a big part of the costs of warehouse maintenance, reducing errors like missed or wrong items should be avoided. Thus, early identification...

chapter

Ontology Alignment Evaluation Initiative: Six Years of Experience

Jérôme Euzenat, Christian Meilicke, Heiner Stuckenschmidt, Pavel Shvaiko, more

Lecture Notes in Computer Science > Journal on Data Semantics XV > Special Report > 158-192

In the area of semantic technologies, benchmarking and systematic evaluation is not yet as established as in other areas of computer science, e.g., information retrieval. In spite of successful attempts, more effort and experience are required in order to achieve such a level of maturity. In this paper, we report results and lessons learned from the Ontology Alignment Evaluation Initiative (OAEI),...

chapter

Zusammenfassung und Literatur

Heiner Stuckenschmidt

Informatik im Fokus > Ontologien > Anwendungen > 267-278

In diesem Buch haben wir uns mit Konzepten, Technologien und Anwendungen von Ontologien in der Informationsverarbeitung beschäftigt. Ziel war es hierbei nicht, den Stand der Technik in diesem Bereich umfassend darzustellen, sondern einen Einstieg in dieses spannende und komplexe Thema zu bieten. Wir haben uns hierzu dem Thema Ontologien aus drei unterschiedlichen Richtungen genähert. Im ersten Teil...

chapter

Approximating Description Logic Classification for Semantic Web Reasoning

Perry Groot, Heiner Stuckenschmidt, Holger Wache

Lecture Notes in Computer Science > The Semantic Web: Research and Applications > Reasoning and Querying > 318-332

In many application scenarios, the use of the Web ontology language OWL is hampered by the complexity of the underlying logic that makes reasoning in OWL intractable in the worst case. In this paper, we address the question whether approximation techniques known from the knowledge representation literature can help to simplify OWL reasoning. In particular, we carry out experiments with approximate...

chapter

Thesaurus Extension Using Web Search Engines

Robert Meusel, Mathias Niepert, Kai Eckert, Heiner Stuckenschmidt

Lecture Notes in Computer Science > The Role of Digital Libraries in a Time of Global Change > Knowledge Structures > 198-207

Maintaining and extending large thesauri is an important challenge facing digital libraries and IT businesses alike. In this paper we describe a method building on and extending existing methods from the areas of thesaurus maintenance, natural language processing, and machine learning to (a) extract a set of novel candidate concepts from text corpora and (b) to generate a small ranked list of suggestions...

chapter

Leveraging Terminological Structure for Object Reconciliation

Jan Noessner, Mathias Niepert, Christian Meilicke, Heiner Stuckenschmidt

Lecture Notes in Computer Science > The Semantic Web: Research and Applications > Web of Data Track > 334-348

It has been argued that linked open data is the major benefit of semantic technologies for the web as it provides a huge amount of structured data that can be accessed in a more effective way than web pages. While linked open data avoids many problems connected with the use of expressive ontologies such as the knowledge acquisition bottleneck, data heterogeneity remains a challenging problem. In particular,...

chapter

A Framework for Handling Inconsistency in Changing Ontologies

Peter Haase, Frank Harmelen, Zhisheng Huang, Heiner Stuckenschmidt, more

Lecture Notes in Computer Science > The Semantic Web – ISWC 2005 > Research/Academic Track > 353-367

One of the major problems of large scale, distributed and evolving ontologies is the potential introduction of inconsistencies. In this paper we survey four different approaches to handling inconsistency in DL-based ontologies: consistent ontology evolution, repairing inconsistencies, reasoning in the presence of inconsistencies and multi-version reasoning. We present a common formal basis for all...

chapter

Root Cause Analysis through Abduction in Markov Logic Networks

Joerg Schoenfisch, Janno von Stulpnagel, Jens Ortmann, Christian Meilicke, more

2016 IEEE 20th International Enterprise Distributed Object Computing Conference (EDOC) > 1 - 8

2016 IEEE 20th International Enterprise Distributed Object Computing Conference (EDOC)

IT infrastructure is a crucial part in most of today''s business operations. High availability and reliability, and short response times to outages are essential. Thus a high amount of tool support and automation in risk management is desirable to decrease outages. We propose a new approach for calculating the root cause for an observed failure in an IT infrastructure. Our approach is based on Abduction...

chapter

Introduction to Part II

Heiner Stuckenschmidt, Christine Parent, Stefano Spaccapietra

Lecture Notes in Computer Science > Modular Ontologies > Partitioning and Extraction of Modules > 157-158

In an ideal world, ontologies would be build in a modular way from the start thus showing the benefits well known from modularization in software engineering. The first part of this book contained an example of how this can be done for databases. Unfortunately, the field of ontology engineering has not yet developed comprehensive models and methods to fully support the development of modular ontologies...

chapter

Rule-Based Approaches for Representing Probabilistic Ontology Mappings

Andrea Calì, Thomas Lukasiewicz, Livia Predoiu, Heiner Stuckenschmidt

Lecture Notes in Computer Science > Uncertainty Reasoning for the Semantic Web I > Probabilistic and Dempster-Shafer Models > 66-87

Using mappings between ontologies is a common way of approaching the semantic heterogeneity problem on the Semantic Web. To fit into the landscape of Semantic Web languages, a suitable logic-based representation formalism for mappings is needed, which allows to reason with ontologies and mappings in an integrated manner, and to deal with uncertainty and inconsistencies in automatically created mappings...

chapter

Approximate Information Filtering on the Semantic Web

Heiner Stuckenschmidt

Lecture Notes in Computer Science > KI 2002: Advances in Artificial Intelligence > Knowledge Representation, Semantic Web, AI Planning > 114-128

Facing the increasing amount of information available on the World Wide Web, intelligent techniques for content-based information filtering gain more and more importance. Conventional approaches using keyword- or text-based retrieval methods have been developed that perform reasonably well. However, these approaches have problems with ambiguous and imprecise information. The semantic web that aims...

chapter

Query-Based Access Control for Ontologies

Martin Knechtel, Heiner Stuckenschmidt

Lecture Notes in Computer Science > Web Reasoning and Rule Systems > Full Papers > 73-87

Role-based access control is a standard mechanism in information systems. Based on the role a user has, certain information is kept from the user even if requested. For ontologies representing knowledge, deciding what can be told to a user without revealing secrets is more difficult as the user might be able to infer secret knowledge using logical reasoning. In this paper, we present two approaches...

chapter

Similarity-Based Query Caching

Heiner Stuckenschmidt

Lecture Notes in Computer Science > Flexible Query Answering Systems > Databases > 295-306

With the success of the semantic web infrastructures for storing and querying RDF data are gaining importance. A couple of systems are available now that provide basic database functionality for RDF data. Compared to modern database systems, RDF storage technology still lacks sophisticated optimization methods for query processing. Current work in this direction is mainly focussed on index structures...

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INFONA - science communication portal

Search results for: Heiner Stuckenschmidt

Analyzing real-world SPARQL queries and ontology-based data access in the context of probabilistic data

Overcoming individual process model matcher weaknesses using ensemble matching

Position-aware activity recognition with wearable devices

Cluster-based hierarchical demand forecasting for perishable goods

Online personalization of cross-subjects based activity recognition models on wearable devices

A smart data annotation tool for multi-sensor activity recognition

Domain Adaptation for Automatic Detection of Speculative Sentences

Recognizing Grabbing Actions from Inertial and Video Sensor Data in a Warehouse Scenario

Ontology Alignment Evaluation Initiative: Six Years of Experience

Zusammenfassung und Literatur

Approximating Description Logic Classification for Semantic Web Reasoning

Thesaurus Extension Using Web Search Engines

Leveraging Terminological Structure for Object Reconciliation

A Framework for Handling Inconsistency in Changing Ontologies

Root Cause Analysis through Abduction in Markov Logic Networks

Introduction to Part II

Rule-Based Approaches for Representing Probabilistic Ontology Mappings

Approximate Information Filtering on the Semantic Web

Query-Based Access Control for Ontologies

Similarity-Based Query Caching

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