Publikationen

Hier finden Sie von Know-Center MitarbeiterInnen verfasste wissenschaftliche Publikationen

2013

Dennerlein Sebastian, Moskaliuk Johannes , Ley Tobias, Kump Barbara

Tracing knowledge co-evolution in a realistic course setting: A wiki-based field experiment

Computers & Education, Pergamon, 2013

The co-evolution model of collaborative knowledge building by Cress & Kimmerle (2008)assumes that cognitive and social processes interact when users build knowledge with shareddigital artifacts. While these assumptions have been tested in various lab experiments, a testunder natural field conditions in educational settings has not been conducted. Here, wepresent a field experiment where we triggered knowledge co-evolution in an accommodationand an assimilation condition, and measured effects on student knowledge building outsidethe laboratory in the context of two university courses. Therefore, 48 students receiveddifferent kinds of prompts that triggered external accommodation and assimilation whilewriting a wiki text. Knowledge building was measured with a content analysis of the students‟texts and comments (externalization), and with concept maps and association tests(internalization). The findings reveal that (a) different modes of externalization(accommodation and assimilation) could be triggered with prompts, (b) across bothconditions, this externalization co-occurred with internalization (student learning), and (c)there is some evidence that external assimilation and accommodation had differential effectson internal assimilation and accommodation. Thus, the field experiment supports theassumptions of the co-evolution model in a realistic course setting. On a more general note,the study provides an example of how wikis can be used successfully for collaborativeknowledge building within educational contexts.
2013

The Social Semantic Server: A Framework to Provide Services on Social Semantic Network Data

I-SEMANTICS Posters & Demos, volume 1026 of CEUR Workshop Proceedings, 2013

This paper presents work-in-progress on the Social Semantic Server, an open framework providing applications and their users with a growing set of services of different granularity that utilize social and artifact network data. The Social Semantic Server forms a novel approach to store, query and update semantically enriched social data in order to exploit its relations within. The use of its services will be demonstrated in an exemplary use case in the health care domain.
2013

Integrating User Preferences Into Distance Metrics

Accepted for publication in Proceedings of the LWA2013 Workshop on Knowledge Discovery, Data Mining and Machine Learning, 2013

Many practical scenarios such as search, classification or clustering benefit from better understanding their users, for instance, to deliver more relevant search results. Instead of committing ourselves to a specific field of research, e.g. by generating user profiles to enhance information retrieval, we seek to incorporate user preferences into the distance metric itself which lies at the heart of many algorithms including Information Retrieval and Machine Learning. The two approaches we explore in this paper allow users to directly convey their preferences in an intuitive way. The first approach adheres to the idea that just stating whether two documents are similar or not is more intuitive for a user than, for instance, assigning them to a broad spectrum of topics. The second approach seeks to take into account a user’s mental construct of the world being provided with a user-specific concept hierarchy. To evaluate our two approaches, we perform a text classification task. In the classification setting we use the Reuters RCV1 corpus to simulate user preferences. Our results indicate the principal feasibility of these two approaches and encourage further investigations.
2013

Grammar Checker Features for Author Identification and Author Profiling

CLEF 2013 Evaluation Labs and Workshop – Working Notes Papers, 2013

2013

Extraction of References Using Layout and Formatting Information from Scientific Articles

2nd International Workshop on Mining Scientific Publications, 2013

2013

Exploiting Wiktionary for Lightweight Part-of-Speech Tagging for Machine Learning Tasks

DATA ANALYTICS 2013, The Second International Conference on Data Analytics, F. Laux, 2013

2013

A User-interaction Approach in an Information-cockpit

in Proceedings of the 9th International Conference on Web Information Systems and Technologies (WEBIST 2013), pp. 635-639., 2013

2013

KnCe2013-Core:Ähnlichkeitanalyse semantischer Texte auf Basis von Wissensbasen

Semeval, 2013

In this paper we describe KnCe2013-CORE, a system to compute the semantic similarity of two short text snippets. The system com- putes a number of features which are gath- ered from different knowledge bases, namely WordNet, Wikipedia and Wiktionary. The similarity scores derived from these features are then fed into several multilayer perceptron neuronal networks. Depending on the size of the text snippets different parameters for the neural networks are used. The final out- put of the neural networks is compared to hu- man judged data. In the evaluation our system performed sufficiently well for text snippets of equal length, but the performance dropped considerably once the pairs of text snippets differ in size.
2013

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OPTIMUM - International Symposium on Recent Advances in Transport Modelling, 2013

Today, proper traffic incident management (IM) has to deal increasingly with problems such as traffic congestion and environmental sustainability. Therefore, IM intends to clear the road for traffic as quickly as possible after an incident has happened. Electronic data verifiably has great potential for supporting traffic incident management. As a consequence, this paper presents an innovative incident detection method using anonymized mobile communications data. The aim is to outline suitable methods for depicting the traffic situation of a designated test area. In order to be successful, the method needs to be able to calculate the traffic situation in-time and report anomalies back to the motorway operator. The resulting procedures are compared to data from real incidents and are thus validated. Special attention is turned to the question whether incidents can be detected quicker with the aid of mobile phone data than with conventional methods. Also, a focus is laid on the quicker deregistration of the incident, so that the traffic management can react superiorly.
2013

Breitweiser Christian, Terbu Oliver, Holzinger Andreas, Brunner Clemens, Lindstaedt Stefanie , Müller-Putz Gernot

iScope - Viewing Biosignals on Mobile Devices.

Joint International Conference on Pervasive Computing and the Networked World, Qiaohong Zu, Bo Hu, Atilla Elçi , Springer, 2013

Journal
We developed an iOS based application called iScope to monitor biosignals online. iScope is able to receive different signal types via a wireless network connection and is able to present them in the time or the frequency domain. Thus it is possible to inspect recorded data immediately during the recording process and detect potential artifacts early without the need to carry around heavy equipment like laptops or complete PC workstations. The iScope app has been tested during various measurements on the iPhone 3GS as well as on the iPad 1 and is fully functional.
2013

Affective Metacognitive Scaffolding and Enriched User Modelling for Experiential Training Simulators: A Follow-up Study.

EC-TEL 2013 Proceedings, LNCS, vol. 8095., Springer, 2013

2013

An Investigation of Successful Self-Regulated-Learning in a Technology-Enhanced Learning Environment

AIED 2013 Workshops Proceedings (SRL@ET), 2013

2013

Utilizing Social Networks for User Model Priming: User Attitudes.

UMAP 2013 Extended Proceedings. Late-Breaking Results and Project Papers., 2013

2013

Automatic Test Item Creation in Self-Regulated Learning: Evaluating quality of questions in a Latin American experience.

Proceedings of CSEDU 2013 , 2013

2013

Recommending Tags with a Model of Human Categorization

Proceedings of the 22nd ACM international conference on Conference on information and knowledge management, 2013

When interacting with social tagging systems, humans exercise complex processes of categorization that have been the topic of much research in cognitive science. In this paper we present a recommender approach for social tags derived from ALCOVE, a model of human category learning. The basic architecture is a simple three-layers connectionist model. The input layer encodes patterns of semantic features of a user-specific resource, such as latent topics elicited through Latent Dirichlet Allocation (LDA) or available external categories. The hidden layer categorizes the resource by matching the encoded pattern against already learned exemplar patterns. The latter are composed of unique feature patterns and associated tag distributions. Finally, the output layer samples tags from the associated tag distributions to verbalize the preceding categorization process. We have evaluated this approach on a real-world folksonomy gathered from Wikipedia bookmarks in Delicious. In the experiment our approach outperformed LDA, a well-established algorithm. We attribute this to the fact that our approach processes semantic information (either latent topics or external categories) across the three different layers. With this paper, we demonstrate that a theoretically guided design of algorithms not only holds potential for improving existing recommendation mechanisms, but it also allows us to derive more generalizable insights about how human information interaction on the Web is determined by both semantic and verbal processes.
2013

Tracing knowledge co-evolution in a realistic course setting: A wiki-based field experiment

Computers& Education, Elsevier, 2013

Konferenz
2013

Proceedings of the 3rd Workshop on Awareness and Reflection in Technology Enhanced Learning

CEUR Workshop Proceedings, 2013

Konferenz
2013

Models of human navigation in information networks based on decentralized search

Proceedings of ACM Conference on Hypertext and Hypermedia, 2013

2013

Navigational evaluation of breadth first search spanning trees

Information & Communication Technology Electronics & Microelectronics (MIPRO) Proceedings of International Convention on Information and Communication Technology, Electronics and Microelectronics , 2013

2013

Predicting Social Interactions from Different Sources of Location-based Knowledge

In Proceedings of the The Third International Conference on Social Eco-Informatics , 2013

2013

Who will Interact with Whom? A Case-Study in Second Life using Online and Location-based Social Network Features to Predict Interactions between Users,

In Ubiquitous Social Media Analysis, Lecture Notes in Computer Science, Springer, 2013

Journal
2013

The 24th ACM Conference on Hypertext and Social Media (HT2013): A Personal Review

ACM SIGWEB Nesletter, ACM, 2013

Konferenz
2013

Pammer-Schindler Viktoria, Simon Nina, Lindstaedt Stefanie

Reflective Learning at Work

Advances in Technology Enhanced Learning, Fridolin Wild, Paul Lefrere, Peter Scott, 2013

Journal
2013

Höfler Patrick, Granitzer Michael, Sabol Vedran, Lindstaedt Stefanie

Linked Data Query Wizard: A Tabular Interface for the Semantic Web

ESWC 2013, LNCS 7882, P. Cimiano et al., Springer, Heidelberg, 2013

Konferenz
Linked Data has become an essential part of the Semantic Web. A lot of Linked Data is already available in the Linked Open Data cloud, which keeps growing due to an influx of new data from research and open government activities. However, it is still quite difficult to access this wealth of semantically enriched data directly without having in-depth knowledge about SPARQL and related semantic technologies. In this paper, we present the Linked Data Query Wizard, a prototype that provides a Linked Data interface for non-expert users, focusing on keyword search as an entry point and a tabular interface providing simple functionality for filtering and exploration.
2013

Towards a Model of Interdisciplinary Teamwork for Web Science: What can Social Theory Contribute?

Web Science 2013 Workshop: Harnessing the Power of Social Theory for Web Science, 2013

2013

Awareness and reflection in technology enhanced learning (Editorial)

Proceedings of the 3rd Workshop on Awareness and Reflection in Technology-Enhanced Learning In conjunction with the 8th European Conference on Technology Enhanced Learning: Scaling up learning for sustained impact (ECTEL 2013), Paphos, Cyprus., CEUR Workshop Proceedings, 2013

2013

Divintini Monica, Ley Tobias, Lindstaedt Stefanie , Pammer-Schindler Viktoria, Prilla Michael

Proceedings of {ECTEL} meets {ECSCW} 2013, the Workshop on Collaborative Technologies for Working and Learning, Paphos, Cyprus, September, 21, 2013

CEUR Workshop Proceedings, 2013

Konferenz
With this workshop, we brought together the European communities of technology-enhanced learning, which typically meets at the ECTEL, and of computer-supported cooperative work, which typically meets at the ECSCW. While the ECTEL community has traditionally focused on technology support for learning, be it in formal learning environments like schools, universities, etc. or in informal learning environments like workplaces, the ECSCW community has traditionally investigated how computers can and do mediate and influence collaborative work, in settings as diverse as the typical “gainful employment” situations, project work within university courses, volunteer settings in NGOs etc. Despite overlapping areas of concerns, the two communities are also exploiting different theories and methodological approaches. Within this workshop, we discussed issues that are relevant for both communities, and have the potential to contribute to a more lively communication between both communities.
2013

Exploring distant objects with augmented reality

Proceedings of the 5th Joint Virtual Reality Conference, Eurographics Association Aire-la-Ville, Switzerland, Switzerland ©2013 , 2013

Augmented reality (AR) enables users to retrieve additional information about the real world objects and locations. Exploring such location-based information in AR requires physical movement to different viewpoints, which may be tiring and even infeasible when viewpoints are out of reach. In this paper, we present object-centric exploration techniques for handheld AR that allow users to access information freely using a virtual copy metaphor to explore large real world objects. We evaluated our interfaces in controlled conditions and collected first experiences in a real world pilot study. Based on our findings, we put forward design recommendations that should be considered by future generations of location-based AR browsers, 3D tourist guides, or in situated urban planning.
2013

Automated Visualization Support for Linked Research Data

Proceedings of i-SEMANTICS 2013, 2013

2013

Assessing Barcamps: Incentives for Participation in Ad-Hoc Conferences and the Role of Social Media

Proceedings of I-KNOW 2013 11 4-6.September 2010, Graz, Austria, 2013

2013

Ley Tobias, Cook John, Dennerlein Sebastian, Kravcik Milos, Kunzmann Christine, Laanpere Mart, Pata Kai, Purma Jukka, Sandars John, Santos Patricia, Schmidt Andreas

Scaling Informal Learning: An Integrative Systems View on Scaffolding at the Workplace

European Conference on Technology Enhanced Learning, Springer Berlin Heidelberg, 2013

While several technological advances have been suggested to scale learning at the workplace, none has been successful to scale informal learning. We review three theoretical discourses and suggest an integrated systems model of scaffolding informal workplace learning that has been created to tackle this challenge. We derive research questions that emerge from this model and illustrate these with an in-depth analysis of two workplace learning domains.
2013

Linked Data Interfaces for Non-expert Users

ESWC 2013, LNCS 7882, P. Cimiano et al., Springer, Heidelberg, 2013

2013

Kraker Peter, Dennerlein Sebastian

Towards a Model of Interdisciplinary Teamwork for WebScience: What can Social Theory Contribute?

Web Science 2013 Workshop: Harnessing the Power of Social Theory for Web Science, Paris, 2013

In this position paper, we argue that the different disciplinesin Web Science do not work together in an interdisciplinaryway. We attribute this to a fundamental difference in approachingresearch between social scientists and computerscientists, which we call the patterns vs. model problem.We reason that interdisciplinary teamwork is needed toovercome the patterns vs. model problem. We then discusstwo theoretical strains in social science which we see asrelevant in the context of interdisciplinary teamwork. Finally,we sketch a model of interdisciplinary teamwork in WebScience based on the interplay of collaboration and cooperation.
2013

Dennerlein Sebastian

Understanding and Supporting Intersubjective Meaning Making in Socio-Technical Systems: A Cognitive Psychology Perspective

Doctoral Consortium at the European Conference on Technology Enhanced Learning (EC-TEL 2013), 2013

This dissertation will elaborate on the understanding of intersubjective meaning making by analyzing the traces of collaborative knowledge construction users leave behind in socio-technical systems. Therefore, it will draw upon more theoretical and more formal models of cognitive psychology to describe and explain the underlying process in detail. This is done with the goal to support intersubjective meaning making and thus elevate informal collaborative knowledge construction in nowadays affordances of social media.
2013

Dennerlein Sebastian, Santos Patricia, Kämäräinen Pekka , Deitmer Ludger , Heinemann Lars , Campbell Melanie, Dertl Michael, Bachl Martin, Trattner Christoph, Bauters Merja

Sharing Turbine: Bridging Informal and Formal Learning for their Mutual Enrichment

DOI, 2013

Being able to connect informal and formal learning experiences is thekey to successful apprenticeships. For instance the knowledge emerging out ofpractice should be used to extend and refine formal leaning experiences, andvice versa. Currently such scenarios are not supported appropriately withtechnology in many different domains. This paper focuses on the constructiondomain, which is one of the test-beds in the recently started large-scale EUproject ‘Learning Layers’. We suggest a model for bridging this gap betweenformal and informal learning by co-designing with construction sectorrepresentatives to identify how web services, apps and mobile devices can beorchestrated to connect informal and formal learning with the goal of enhancingcollaboration and supporting contextual learning at the workplace.
2013

Cook John, Santos Patricia, Ley Tobias, Dennerlein Sebastian, Pata Kai, Colley Joanna, Sandars John, Treasure-Jones Tamsin

D2. 1 Concept & Prototype Networked Scaffolding Layer

2013

2013

Dennerlein Sebastian, Gutounig Robert, Kraker Peter, Kaiser Rene, Rauter Romana , Ausserhofer Julian

Assessing Barcamps: Incentives for Participation in Ad-hoc Conferences and the Role of Social Media

Proceedings of the 13th International Conference on Knowledge Management and Knowledge Technologies, ACM, 2013

Barcamps are informal conferences whose content is not de-fined in advance, often referred to as ad-hoc conferences orun-conferences. Therefore, the outcomes of a barcamp arelargely unknown before the event. This raises the question ofthe participants’ motivations to attend and contribute. Toanswer this question, we conducted an exploratory empiricalstudy at Barcamp Graz 2012. We applied a mixed-methodapproach: first we used a socio-demographic questionnaire(n=99) which allowed us to characterize the ’typical barcamper’.Second, we conducted qualitative interviews (n=10) toget a deeper understanding of the participants’ motivationsto attend, expectations, and the use of social media in thatcontext. We identified three concepts, which could be deductedfrom the interviews: people, format and topics. Wefound that the motivation to attend and even a commonidentity is quite strongly based on these three factors. Furthermore,the results indicate that participants share a set ofactivities and methods by following the barcamp’s inherentrules and make extensive use of social media.
2013

Silva Nelson

The 6th Sense of an Air Traffic Controller Increasing Fault Tolerance of Human Machine Interfaces

SID 2013, 2013

Konferenz
2013

Ullrich Torsten, Silva Nelson, Eggeling Eva, Fellner Dieter W.

Generative Modeling and Numerical Optimization for Energy Efficient Buildings (1)

IECON 2013 , 2013

Buch
2013

Ullrich Torsten, Silva Nelson, Eggeling Eva, Fellner Dieter W.

Generative Modeling and Numerical Optimization for Energy Efficient Buildings (2)

Proceedings of 2013 / OCG Energy Informatics , 2013

Buch
2013

Kalkofen Denis, Veas Eduardo Enrique, Zollmann Stefanie, Steinberger Markus, Schmalstieg Dieter

Adaptive ghosted views for augmented reality

Mixed and Augmented Reality (ISMAR), 2013 IEEE International Symposium on, IEEE, 2013

Konferenz
In Augmented Reality (AR), ghosted views allow a viewer to ex-plore hidden structure within the real-world environment. A bodyof previous work has explored which features are suitable to sup-port the structural interplay between occluding and occluded ele-ments. However, the dynamics of AR environments pose seriouschallenges to the presentation of ghosted views. While a modelof the real world may help determine distinctive structural features,changes in appearance or illumination detriment the composition ofoccluding and occluded structure. In this paper, we present an ap-proach that considers the information value of the scene before andafter generating the ghosted view. Hereby, a contrast adjustment ofpreserved occluding features is calculated, which adaptively variestheir visual saliency within the ghosted view visualization. This al-lows us to not only preserve important features, but to also supporttheir prominence after revealing occluded structure, thus achieving a positive effect on the perception of ghosted views.
2013

Tatzgern Markus, Grasset Raphael, Veas Eduardo Enrique, Kalkofen Denis, Schmalstieg Dieter

Exploring Distant Objects with Augmented Reality.

EGVE/EuroVR, 2013

Konferenz
Augmented reality (AR) enables users to retrieve additional information about the real world objects and locations.Exploring such location-based information in AR requires physical movement to different viewpoints, which maybe tiring and even infeasible when viewpoints are out of reach. In this paper, we present object-centric explorationtechniques for handheld AR that allow users to access information freely using a virtual copy metaphor to explorelarge real world objects. We evaluated our interfaces in controlled conditions and collected first experiences in areal world pilot study. Based on our findings, we put forward design recommendations that should be consideredby future generations of location-based AR browsers, 3D tourist guides, or in situated urban plannin
2013

Traffic incident management with cellular network data

International Symposium on Recent Advances in Transport Modelling, 2013

2013

Surprise, Surprise: Activity Log Based Time Analytics for Time Management

Accepted for Publication in: Extended Abstracts Proceedings of CHI 2013, 2013

2013

Fostering Collaborative Redesign of Work Practice: Challenges for Tools Supporting Reflection at Work

Accepted for Publication in: Proceedings of the European Conference on Computer-Supported Cooperative Work (ECSCW) 2013, 2013

2013

Social stream marketing on Facebook: a case study

International Journal of Social and Humanistic Computing, 2013

Konferenz
2013

Download vs. Citation vs. Readership Data: The Case of an Information Systems Journal

14th International Society of Scientometrics and Informetrics Conference, 2013

2013

Kraker Peter, Trattner Christoph, Jack Kris, Lindstaedt Stefanie , Schlgl Christian

Head Start: Improving Academic Literature Search with Overview Visualizations based on Readership Statistics

Web Science 2013, 2013

Konferenz
At the beginning of a scientific study, it is usually quite hardto get an overview of a research field. We aim to addressthis problem of classic literature search using web data. Inthis extended abstract, we present work-in-progress on aninteractive visualization of research fields based on readershipstatistics from the social reference management systemMendeley. To that end, we use library co-occurrences as ameasure of subject similarity. In a first evaluation, we findthat the visualization covers current research areas withineducational technology but presents a view that is biasedby the characteristics of readers. With our presentation, wehope to elicit feedback from the Websci’13 audience on (1)the usefulness of the prototype, and (2) how to overcomethe aforementioned biases using collaborative constructiontechniques.
2013

Crowdsourcing Fact Extraction from Scientific Literature

Proceedings of SouthCHI 2013, 2013

2013

Using Factual Density to Measure Informativeness of Web Documents

In Proceedings of the 19th Nordic Conference on Computational Linguistics, NoDaLiDa 2013, Oslo, Norway, May 22 - May 24, 2013

2013

Towards Linking Buyers and Sellers: Detecting Commercial Intent on Twitter

Making Sense of Microposts (MSM'13), 2013

Since more and more people use the micro-blogging platform Twitter to convey their needs and desires, it has become a particularly interesting medium for the task of identifying commercial activities. Potential buyers and sellers can be contacted directly thereby opening up novel perspectives and economic possibilities. By detecting commercial intent in tweets, this work is considered a first step to bring together buyers and sellers. In this work, we present an automatic method for detecting commercial intent in tweets where we achieve reasonable precision 57% and recall 77% scores. In addition, we provide insights into the nature and characteristics of tweets exhibiting commercial intent thereby contributing to our understanding of how people express commercial activities on Twitter.
2013

Text Representation for Efficient Document Annotation

Journal of Universal Computer Science, Christian Gütl, 2013

Konferenz
2013

Understanding and Supporting Reflective Learning Processes in the Workplace: The RL@Work Model

Proceedings, 2013

2013

An Unsupervised Machine Learning Approach to Body Text and Table of Contents Extraction from Digital Scientific Articles

Research and Advanced Technology for Digital Libraries - International Conference on Theory and Practice of Digital Libraries, TPDL 2013, Valletta, Malta, September 22-26, 2013. Proceedings, T. Aalberg, C. Papatheodorou, M. Dobreva, G. Tsakonas, C. J. Farrugia, Springer Berlin Heidelberg, 2013

2013

A Visual Approach to Project and Portfolio Monitoring

Proceedings of the 17th International Conference on Information Visualisation (IV2013), 2013

2013

Acquaintance or Partner? Predicting Partnership in Online and Location-based Social Networks

Proceedings of the 2013 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining, IEEE/ACM, 2013

2013

Predicting Interactions In Online Social Networks: An Experiment in Second Life

Proceedings of the 4th International Workshop on Modeling Social Media, Martin Atzmueller, Alvin Chin, Christoph Trattner, ACM, 2013

2013

Proceedings of the 4th International Workshop on Modeling Social Media, MSM '13

Proceedings of the 4th International Workshop on Modeling Social Media, Martin Atzmueller, Alvin Chin, Christoph Trattner, ACM, 2013

Konferenz
2013

Trattner Christoph, Smadi Mohammad, Theiler Dieter, Dennerlein Sebastian, Kowald Dominik, Rella Matthias, Kraker Peter, Barreto da Rosa Isaías, Tomberg Vladimir, Kröll Mark, Treasure-Jones Tamsin, Kerr Micky, Lindstaedt Stefanie , Ley Tobias

D5.1 Social Semantic Network: Concept and Prototype 1

2013

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