Daniel Schall

About

This Web page gives a summary of Daniel Schall’s research. On this Web page, you find links to numerous scientific papers, technical reports and presentations. The main body of work focuses on Web-based information systems, service-oriented architectures, collaborative environments and social network analysis. If you are interested in these topics as well you can get in touch with me by Email or via LinkedIn.

Short Bio

Daniel Schall is currently employed as a software architect and research scientist. From 03/2009 to 10/2011, he worked as a senior research scientist at the Vienna University of Technology. Daniel defended his PhD in 02/2009 with a thesis on `Human Interactions in Mixed Systems - Architecture, Protocols, and Algorithms', which he performed while working as a research assistant at the Vienna University of Technology (05/2006 - 02/2009). Prior to that, he worked at Siemens Corporate Research in Princeton, New Jersey, USA.

Navigate To: Research Topics; Research Projects; Publications; PC Membership; Reviewer for Journals; Certificates.

Last update: Jan. 19, 2013

Research Topics

My research focuses on software and systems engineering topics and application oriented topics. Both areas go hand in hand at different layers of abstraction. While the former topics are more recent, the latter topics have a rather long track record dating back to 2005/2006.

Scalability and Resiliency of Large-scale Distributed Systems

Here I focus on large-scale distributed systems with particular emphasis on software and systems engineering aspects including:

• Modeling of Non-Functional Requirements (NFRs).
• Scalability and resiliency models for large-scale distributed systems.
• Techniques and algorithms to measure and quantity the quality of source code.

Crowdsourcing, Human Computation and Human-Provided Services

In this context, my research focuses on human computation and crowdsourcing techniques in open Web-based environments. Some important key publications include:

• Service-Oriented Crowdsourcing: Architecture, Protocols and Algorithms

  The work presented in the book provides a consolidated description of my research in the field of human computation and crowdsourcing. At a fundamental level, service-oriented crowdsourcing applies the principles of service-oriented architecture (SOA) to the discovery, composition and selection of a scalable human workforce. Service-oriented crowdsourcing is intended for researchers and other academics as an in-depth guide to developing new applications based on crowdsourcing platforms and evaluating various selection and ranking algorithms. The book has been published as part of the SpringerBriefs in Computer Science series. SpringerBriefs present concise summaries of cutting-edge research and practical applications across a wide spectrum of fields.

• Expertise Ranking using Activity and Contextual Link Measures: The paper introduces algorithms and methods for context-sensitive expertise mining. The approach is based on popular and well-established link-analysis techniques such as PageRank and HITS. The novelty of the approach is that links in social networks are augmented with topic information originating from collaborations and interactions.

• Unifying Human and Software Services in Web-Scale Collaborations: The paper discusses the application of SOA principles in the context of crowdsourcing and expert finding. The approach is called Human-Provided Services (HPS). The novelty of HPS is that it enables the discovery and recommendation of experts based on the structure of collaborative networks and social interactions between people.

Research Projects

Below are some finished projects I have been involved in. The list will be updated with more recent activities soon.

• COIN - collaboration and interoperability for networked enterprises: EU Framework 7 IP project, Call 1, Theme ICT 1.1.3 ICT in support of the networked enterprise.
• inContext - interaction and context based technologies for collaborative teams: EU Framework 6 STREP project, Call 5, ICT.

Publications

Copyright Policy on Published Papers
Several papers are available for download. By following these links you agree to respect the copyrights of the papers. The papers obtained from this Web page are included by the contributing authors as a means to ensure timely dissemination of scholarly and technical work on a non-commercial basis. Copyright and all rights therein are maintained by the authors or by other copyright holders, notwithstanding that they have offered their works here electronically. It is understood that all persons copying this information will adhere to the terms and constraints invoked by each author's copyright. These works may not be reposted without the explicit permission of the copyright holder.

External Links

• DBLP Bibliography Server
• Google Scholar Index
• SlideShare

In the following a list of scientific papers including journals, magazines, conferences papers and technical reports can be found. All publications are listed in reverse chronological order.

Journal & Magazine Articles

1. 2012
15. Satzger B., Psaier H., Schall D., Dustdar S. Auction-based Crowdsourcing Supporting Skill Management. Information Systems Journal, Elsevier, forthcoming.
14. Schall D., Satzger, B., Psaier H. Crowdsourcing Tasks to Social Networks in BPEL4People. World Wide Web, Springer, forthcoming.
13. Schall D., Skopik F. Social Network Mining of Requester Communities in Crowdsourcing Markets. Social Network Analysis and Mining, Springer, Volume 2, Issue 4, December 2012, pp. 329-344.
12. Skopik F., Schall D., Dustdar S. Trusted Information Sharing Using SOA-Based Social Overlay Networks. International Journal of Computer Science and Applications, Technomathematics Research Foundation, Volume 9, Issue 1, 2012, pp. 116-151.
11. Schall D., Skopik F., Dustdar S. Expert Discovery and Interactions in Mixed Service-Oriented Systems. Transactions on Services Computing, IEEE, Volume 5, Number 2, April-June 2012, pp. 233-245. (published online 2 Feb. 2011)
    [doi] [bib]
10. Schall D. Expertise Ranking using Activity and Contextual Link Measures. Data & Knowledge Engineering, Elsevier, Volume 71, Issue 1, January 2012, pp. 92-113. (published online 5 Sept. 2011)
    [doi] [bib]

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    2011
9. Schall D. Formation and Interaction Patterns in Social Crowdsourcing Environments. International Journal of Communication Networks and Distributed Systems (IJCNDS), Special Issue on `Modelling of Emerging Internet Services: Social Networks and Crowdsourcing', Inderscience, forthcoming. (accepted Dec. 2011)
8. Dorn C., Skopik F., Schall D., Dustdar S. Interaction Mining and Skill-dependent Recommendations for Multi-objective Team Composition. Data & Knowledge Engineering, Elsevier, Volume 70, Issue 10, October 2011, pp. 866-891.
   
7. Schall D. A Human-centric Runtime Framework for Mixed Service-oriented Systems. Distributed and Parallel Databases, Springer, Volume 29, Numbers 5-6, Oktober 2011, pp. 333-360.
   [doi] [bib]
6. Skopik F., Schall D., Psaier H., Treiber M., Dustdar S. Towards Social Crowd Environments using Service-oriented Architectures, it - Information Technology: Special Issue on Knowledge Processes and Services, Volume 53, Issue 3, March 2011, pp 108-116.

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   2010
5. Skopik F., Schall D., Dustdar S. Modeling and Mining of Dynamic Trust in Complex Service-oriented Systems. Information Systems Journal, Elsevier, Volume 35, Issue 7, November 2010, pp. 735-757.
4. Schall D., Dustdar S., Blake M.B. Programming Human and Software-Based Web Services. Computer, IEEE, Volume 43, Number 7, July 2010, pp. 82-85.
   [doi] [bib]

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   2006 - 2009
3. Schall, D., Dustdar S. The New Role of Humans in the Future Internet. ERCIM News, Special Theme on Future Internet Technology, Volume 77, April 2009, pp. 38-39.
   [online]
2. Schall D., Truong H.-L., Dustdar S. Unifying Human and Software Services in Web-Scale Collaborations. Internet Computing, IEEE, Volume 12, Number 3, May/Jun 2008, pp. 62-68.
   [doi] [bib]
1. Schall D., Aiello M., Dustdar S. Web Services on Embedded Devices. International Journal of Web Information Systems, Volume 2, Number 1, June 2006, pp. 45-50.

Conference Proceedings

1. 2012
43. Khazankin R., Schall D., Dustdar S. Predicting QoS in Scheduled Crowdsourcing. 24th International Conference on Advanced Information Systems Engineering (CAiSE), Springer, June 25-29, 2012, Gdansk, Poland.
42. Treiber M., Schall D., Dustdar S., Scherling C. Creating Mobile Ad hoc Workflows with Twitter. 27th Symposium On Applied Computing (SAC), ACM, March 26-30, 2012, Riva del Garda (Trento), Italy.

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    2011
41. Khazankin R., Psaier H., Schall D., Dustdar S. QoS-based Task Scheduling in Crowdsourcing Environments. 9th International Conference on Service Oriented Computing (ICSOC), Springer, December 5-8, 2011, Paphos, Cyprus.
40. Schall D., Skopik F. An Analysis of the Structure and Dynamics of Large-scale Q/A Communities. 15th East-European Conference on Advances in Databases and Information Systems (ADBIS), Springer, September 19-23, 2011, Vienna, Austria.
39. Psaier H., Skopik F., Schall D., Dustdar S. Resource and Agreement Management in Dynamic Crowdcomputing Environments. The 15th IEEE International EDOC Conference (EDOC), August 29 - September 2, 2011, Helsinki, Finland.
38. Satzger B., Psaier H., Schall D., Dustdar S. Stimulating Skill Evolution in Market-based Crowdsourcing. 9th International Conference on Business Process Management (BPM), Springer, August 28 - 2 September, 2011, Clermont-Ferrand, France.
    [online prototype]
37. Skopik F., Schall D., Dustdar S. Opportunistic Information Flows Through Strategic Social Link Establishment. 10th IEEE/WIC/ACM International Conference on Web intelligence (WI)., IEEE, August 22-27, 2011, Lyon, France.
36. Khazankin R., Schall D., Dustdar S. Adaptive Request Prioritization in Dynamic Service-oriented Systems. The 8th International Conference on Services Computing (SCC), IEEE, July 4-9, 2011, Washington DC, USA. Best student paper award.
35. Treiber M., Schall D., Dustdar S., Scherling C. Tweetflows - Flexible Workflows with Twitter. 3rd International Workshop on Principles of Engineering Service-Oriented Systems (PESOS), 33rd ACM/IEEE International Conference on Software Engineering (ICSE), ACM, May 23-24, 2011, Hawaii, USA.
34. Skopik F., Schall D., Dustdar S. Managing Social Overlay Networks in Semantic Open Enterprise Systems. 1st International Conference on Web Intelligence, Mining and Semantics (WIMS), ACM, May 25-27, 2011, Sogndal, Norway.
33. Skopik F., Schall D., Dustdar S. Computational Social Network Management in Crowdsourcing Environments. 16th IEEE International Conference on Engineering of Complex Computer Systems (ICECCS), IEEE, April 27-29, 2011, Las Vegas, USA.
32. Schall D., Skopik F., Psaier H., Dustdar S. Bridging Socially-Enhanced Virtual Communities. 26th ACM Symposium On Applied Computing (SAC), ACM, March 21-25, 2011, TaiChung, Taiwan.
    [slides]
31. Skopik F., Schall D., Psaier H., Dustdar S. Adaptive Provisioning of Human Expertise in Service-oriented Systems. 26th ACM Symposium On Applied Computing (SAC), ACM, March 21-25, 2011, TaiChung, Taiwan.

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    2010
30. Juszczyk L., Schall D., Mietzner R., Dustdar S., Leymann F. CAGE: Customizable Large-scale SOA Testbeds in the Cloud. 6th International Workshop on Engineering Service Oriented Applications (WESOA), 8th International Conference on Service Oriented Computing (ICSOC), Springer, December 7-10, 2010, San Francisco, USA.
29. Psaier H., Skopik F., Schall D., Juszczyk L., Treiber M., Dustdar S. A Programming Model for Self-Adaptive Open Enterprise Systems. 5th Workshop on Middleware for Service Oriented Computing (MW4SOC), 11th ACM/IFIP/USENIX Middleware Conference 2010, ACM, November 29 - December 3, 2010, Bangalore, India.
28. Skopik F., Schall D., Psaier H., Dustdar S. Social Formation and Interactions in Evolving Service-oriented Communities. 8th European Conference on Web Services (ECOWS), IEEE, December 1-3, 2010, Ayia Napa, Cyprus.
27. Schall D., Skopik F. Mining and Composition of Emergent Collectives in Mixed Service-Oriented Systems. 12th IEEE Conference on Commerce and Enterprise Computing (CEC), IEEE, November 10-12, 2010, Shanghai, China.
    [slides]
26. Schall D., Dustdar S. Dynamic Context-Sensitive PageRank for Expertise Mining. 2nd International Conference on Social Informatics (SocInfo), Springer, October 27-29, 2010, Laxenburg, Austria.
25. Psaier H., Juszczyk L., Skopik F., Schall D., Dustdar S. Runtime Behavior Monitoring and Self-Adaptation in Service-Oriented Systems. 4th IEEE International Conference on Self-Adaptive and Self-Organizing Systems (SASO), IEEE, September 27 - October 1, 2010, Budapest, Hungary.
24. Skopik F., Schall D., Dustdar S. Supporting Network Formation through Mining under Privacy Constraints. 10th Annual International Symposium on Applications and the Internet (SAINT), IEEE, July 19-23, 2010, Seoul, South Korea.
23. Psaier H., Skopik F., Schall D., Dustdar S. Behavior Monitoring in Self-healing Service-oriented Systems. 34th Annual IEEE Computer Software and Applications Conference (COMPSAC), IEEE, July 19-23, 2010, Seoul, South Korea.
22. Treiber M., Juszczyk L., Schall D., Dustdar S. Programming Evolvable Web Services. 2nd International Workshop on Principles of Engineering Service-Oriented Systems (PESOS), 32nd ACM/IEEE International Conference on Software Engineering (ICSE), May 2-8, 2010, Cape Town, South Africa.
21. Skopik F., Schall D., Dustdar S., Sesana M. Context-Aware Interaction Models in Cross-Organizational Processes. 5th International Conference on Internet and Web Applications and Services (ICIW), IEEE, May 9-15, 2010, Barcelona, Spain.
20. Treiber M., Skopik F., Schall D., Dustdar S., Haslinger S. Context-aware Campaigns in Social Networks. 5th International Conference on Internet and Web Applications and Services (ICIW), IEEE, May 9-15, 2010, Barcelona, Spain.
19. Skopik F., Schall D., Dustdar S. Trust-based Adaptation in Complex Service-oriented Systems. 15th IEEE International Conference on Engineering of Complex Computer Systems (ICECCS), IEEE, March 22-26, 2010, Oxford, UK.
    [slides]
18. Skopik F., Schall D., Dustdar S. Trustworthy Interaction Balancing in Mixed Service-oriented Systems. 25th ACM Symposium On Applied Computing (SAC), ACM, March 22-26, 2010, Sierre, Switzerland.
17. Skopik F., Schall D., Dustdar S. Trusted Interaction Patterns in large-scale Enterprise Service Networks. 18th Euromicro International Conference on Parallel, Distributed and Network-Based Computing (PDP), IEEE, February 17-19, 2010, Pisa, Italy.

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    2009
16. Dorn C., Schall D., Dustdar S. Context-aware Adaptive Service Mashups. 2009 IEEE Asia-Pacific Services Computing Conference (APSCC), IEEE, December 7-11, 2009, Biopolis, Singapore.
15. Treiber, M., Kritikos, K., Schall, D., Plexousakis, D., Dustdar, S. Modeling Context-aware and Socially-enriched Mashups. 3rd International Workshop on Web APIs and Services Mashups (Mashups), ACM SIGPLAN International Conference on Object-Oriented Programming, Systems, Languages, and Applications (OOPSLA), ACM, October 25-29, 2009, Orlando, Florida, USA.
14. Dorn C., Schall D., Dustdar S. A Model and Algorithm for Self-Adaptation in Service-oriented Systems. 7th IEEE European Conference on Web Service (ECOWS), IEEE, November 9-11, 2009, Eindhoven, Netherlands.
13. Skopik F., Schall D., Dustdar S. Start Trusting Strangers? Bootstrapping and Prediction of Trust. 10th International Conference on Web Information Systems Engineering (WISE), Springer, October 5-7, 2009, Poznan, Poland.
12. Skopik F., Schall D., Dustdar S. The Cycle of Trust in Mixed Service-oriented Systems. 35th Euromicro Conference on Software Engineering and Advanced Applications (SEAA), IEEE, August, 27-29, 2009, Patras, Greece.

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    2008
11. Schall D., Dorn C., Truong H.-L., Dustdar S. On Supporting the Design of Human-Provided Services in SOA. 4th International Workshop on Engineering Service-Oriented Applications (WESOA), 6th Int. Conference on Service Oriented Computing (ICSOC), Springer, December, 1-5, 2008, Sydney, Australia.
    [slides]
10. Dorn C., Schall D., Dustdar S. Achieving Team-awareness in Scientific Grid Environments. 7th International Conference on Grid and Cooperative Computing (GCC), IEEE, October 24-26, 2008, Shenzhen, China.
9. Melchiorre C., Reiff-Marganiec S., Yu H. Q., Schall D., Dustdar S. inContext - Interaction and Context-based Technologies for Collaborative Teams. eChallenges e-2008. October 22-24, 2008, Stockholm, Sweden.
8. Schall D., Dorn C., Dustdar S., Dadduzio I. VieCAR - Enabling Self-adaptive Collaboration Services. 34th EUROMICRO Conference on Software Engineering and Advanced Applications (SEAA), IEEE, September 3-5, 2008, Parma, Italy.
7. Schall D., Truong H.-L., Dustdar S. The Human-Provided Services Framework. IEEE 2008 Conference on Enterprise Computing, E-Commerce and E-Services (CEC/EEE), IEEE, July 21-24, 2008, Washington D.C., USA.
   [slides]
6. Truong H.-L., Dustdar S., Baggio D., Dorn C., Giuliani G., Gombotz R., Hong Y., Kendal P., Melchiorre C., Moretzky S., Peray S., Polleres A., Reiff-Marganiec S., Schall D., Stringa S. inContext: a Pervasive and Collaborative Working Environment for Emerging Team Forms. International Symposium on Applications and the Internet (SAINT), IEEE, July 28 - August 1, 2008, Turku, Finland.

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   2007
5. Schall D., Gombotz R., Dorn C., Dustdar S. Human Interactions in Dynamic Environments through Mobile Web Services. IEEE 2007 International Conference on Web Services (ICWS), IEEE, July 9-13, 2007, Salt Lake City, USA.
   [slides]
4. Dorn C., Schall D., Gombotz R., Dustdar S. A View-based Analysis of Distributed and Mobile Teams. 5th International Workshop on Distributed and Mobile Collaboration (DMC), 16th IEEE International Workshops on Enabling Technologies: Infrastructures for Collaborative Enterprises (WETIC), IEEE, June 18-20, 2007, Paris, France.
3. Schall D., Gombotz R., Dustdar S. Pattern-based Collaboration in Ad-Hoc Teams Through Message Annotation. 9th International Conference on Enterprise Information Systems (ICEIS), ICEIS Proceedings, June 12-16, 2007, Madeira, Portugal.
   

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   2006
2. Gombotz R., Schall D., Dorn C., Dustdar S. Relevance-Based Context Sharing through Interaction Patterns. 2nd International Conference on Collaborative Computing (CollaborateCom), IEEE, November 17-20, 2006, Atlanta, USA.
1. Dorn C., Schall D., Dustdar S. Granular Context in Collaborative Mobile Environments. International Workshop on Context-Aware Mobile Systems (CAMS), Springer, October 31 - November 1, 2006, Montpellier, France.

• Schall D. Human Interactions in Mixed Systems - Architecture, Protocols, and Algorithms. Ph.D. Thesis in Computer Science, Vienna University of Technology, January 2009.
  [slides]

7. Dorn C., Skopik F., Schall D., Dustdar S. Interaction Mining and Skill-dependent Recommendations for Multi-objective Team Composition. Technical Report (TUV-1841-2011-03), Vienna University of Technology, April 2011.
6. Treiber M., Schall D., Dustdar S., Scherling C. Crowdsourcing Mobile Workflows with Tweetflows. Technical Report (TUV-1841-2011-02), Vienna University of Technology, March 2011.
5. Schall D., Psaier H., Treiber M., Skopik F., Engineering Service-Oriented Crowdsourcing for Enterprise Environments. Technical White Paper, Vienna University of Technology, August 2010.
4. Skopik F., Schall D., Dustdar S. Adaptive Information Disclosure in a Dynamic Web of Trust. Technical Report (TUV-1841-2010-03), Vienna University of Technology, April 2010.
3. Schall D., Skopik F., Dustdar S. Trust-based Discovery and Interactions in Mixed Service-Oriented Systems. Technical Report (TUV-1841-2010-01), Vienna University of Technology, April 2010.
2. Skopik F., Schall D., Truong H.-L., Dustdar S. Innovative Human Interaction Services Specification. FP7-216256 COIN Technical Report, January 2009.
1. Schall D., Gombotz R., Dustdar S. Discovering Service-Interaction Patterns - Methods and Mining Algorithms. FP6-034718 inContext Technical Report, November 2006.

6. Haslinger S., Skopik F., Schall D., Treiber M. Woodapples: A new approach for Context Aware Mobile Marketing. In Mobile Web 2.0: Developing and Delivering Services to Mobile Phones, CRC Press, 2010.
5. Reiff-Marganiec S., Dustdar S., Dorn C., Giuliani G., Gombotz R., Hong Y., Melchiorre C., Peray S., Schall D., Stringa S., Tilly M., Truong H.-L., Yu HQ. Context-Aware Collaborative Working Environments. In Handbook of Research on Mobile Multimedia: Second Edition, IGR, 2008.
   
4. Schall D., Dorn C., Dustdar S. Wireless Internet Applications. In Encyclopedia of Wireless and Mobile Communications, CRC Press, 2007.
   
3. Dorn C., Schall D., Dustdar S. Mobile Internet Technologies. In Encyclopedia of Wireless and Mobile Communications, CRC Press, 2007.
   
2. Schall D., Dorn C., Dustdar S. Context-aware Mobile Computing. In Encyclopedia of Wireless and Mobile Communications, CRC Press, 2007.
1. Dorn C., Dustdar S., Giuliani G., Gombotz R., Ning K., Peray S., Reiff-Marganiec S., Schall D., Tilly M. Interaction and Context in Service-Oriented E-Collaboration Environments. In Encyclopedia of E-Collaboration, 2007.

PC Membership

• Workshop on Social Informatics and Social COmputing (SISCO 2011) at The International Conference on Management of Emergent Digital EcoSystems (MEDES'11), November 21-24, 2011, San-Francisco, USA.
• 2nd International Workshop on Cross Enterprise Collaboration (CEC11). In conjunction with the 9th International Conference on Business Process Management (BPM 2011), August 28 - September 2, 2011, Clermont-Ferrand, France.
• 1st International Workshop on Cross Enterprise Collaboration, People, and Work (CEC-PAW10). In conjunction with the 8th International Conference on Business Process Management (BPM 2010), September 13, 2010, Hoboken, USA.
• 1st International Workshop on SOA, Globalization, People, & Work (SG-PAW 2009). In conjunction with the 7th International Joint Conference on Service Oriented Computing (ICSOC 2009), November 24-27, 2009, Stockholm, Sweden.

Reviewer for Journals

• ACM Transactions on Internet Technology
• Elsevier Information Systems
• Elsevier Journal of Systems and Software
• Elsevier Knowledge-Based Systems
• Elsevier Pattern Recognition Letters
• IEEE Communications Magazine
• IEEE Transactions on Services Computing
• Journal of Universal Computer Science

Certificates

• Microsoft Certified Systems Engineer (MCSE)
• Microsoft Certified Database Administrator (MCDBA)