| Position: | Wissenschaftlicher Mitarbeiter |
| Adresse: | Lehrstuhl für Software Engineering Universität Duisburg-Essen Schützenbahn 70 45127 Essen Germany |
| Raum: | SA 022 |
| Telefon: | +49 201 183 7047 |
| Fax: | +49 201 183 7032 |
| E-Mail: | florian.blum (at) uni-due.de |
Publikationen
2021 |
Sigalov, Katharina; Ye, Xuling; König, Markus; Hagedorn, Philipp; Blum, Florian; Severin, Benedikt; Hettmer, Michael; Hückinghaus, Philipp; Wölkerling, Jens; Groß, Dominik Applied Sciences, 11 (16), 2021, ISSN: 2076-3417. @article{app11167653, title = {Automated Payment and Contract Management in the Construction Industry by Integrating Building Information Modeling and Blockchain-Based Smart Contracts}, author = {Katharina Sigalov and Xuling Ye and Markus König and Philipp Hagedorn and Florian Blum and Benedikt Severin and Michael Hettmer and Philipp Hückinghaus and Jens Wölkerling and Dominik Groß}, url = {https://www.mdpi.com/2076-3417/11/16/7653}, doi = {10.3390/app11167653}, issn = {2076-3417}, year = {2021}, date = {2021-01-01}, journal = {Applied Sciences}, volume = {11}, number = {16}, abstract = {Construction projects usually involve signing various contracts with specific billing procedures. In practice, dealing with complex contract structures causes significant problems, especially with regard to timely payment and guaranteed cash flow. Furthermore, a lack of transparency leads to a loss of trust. As a result, late or non-payment is a common problem in the construction industry. This paper presents the concept of implementing smart contracts for automated, transparent, and traceable payment processing for construction projects. Automated billing is achieved by combining Building Information Modeling (BIM) approaches with blockchain-based smart contracts. Thereby, parts of traditional construction contracts are transferred to a smart contract. The smart contract is set up using digital BIM-based tender documents and contains all of the relevant data for financial transactions. Once the contracted construction work has been accepted by the client, payments can be made automatically via authorized financial institutions. This paper describes the framework, referred to as BIMcontracts, the container-based data exchange, and the digital contract management workflow. It discusses the industry-specific requirements for blockchain and data storage and explains which technical and software architectural decisions were made. A case study is used to demonstrate the current implementation of the concept.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Construction projects usually involve signing various contracts with specific billing procedures. In practice, dealing with complex contract structures causes significant problems, especially with regard to timely payment and guaranteed cash flow. Furthermore, a lack of transparency leads to a loss of trust. As a result, late or non-payment is a common problem in the construction industry. This paper presents the concept of implementing smart contracts for automated, transparent, and traceable payment processing for construction projects. Automated billing is achieved by combining Building Information Modeling (BIM) approaches with blockchain-based smart contracts. Thereby, parts of traditional construction contracts are transferred to a smart contract. The smart contract is set up using digital BIM-based tender documents and contains all of the relevant data for financial transactions. Once the contracted construction work has been accepted by the client, payments can be made automatically via authorized financial institutions. This paper describes the framework, referred to as BIMcontracts, the container-based data exchange, and the digital contract management workflow. It discusses the industry-specific requirements for blockchain and data storage and explains which technical and software architectural decisions were made. A case study is used to demonstrate the current implementation of the concept. |
2019 |
Wessling, Florian; Ehmke, Christopher; Meyer, Ole; Gruhn, Volker Towards Blockchain Tactics: Building Hybrid Decentralized Software Architectures Inproceedings IEEE International Conference on Software Architecture Companion, ICSA Companion 2019, Hamburg, Germany, March 25-26, 2019, S. 234–237, 2019. @inproceedings{DBLP:conf/icsa/WesslingEMG19, title = {Towards Blockchain Tactics: Building Hybrid Decentralized Software Architectures}, author = {Florian Wessling and Christopher Ehmke and Ole Meyer and Volker Gruhn}, url = {https://doi.org/10.1109/ICSA-C.2019.00048}, doi = {10.1109/ICSA-C.2019.00048}, year = {2019}, date = {2019-01-01}, booktitle = {IEEE International Conference on Software Architecture Companion, ICSA Companion 2019, Hamburg, Germany, March 25-26, 2019}, pages = {234--237}, crossref = {DBLP:conf/icsa/2019c}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Ehmke, Christopher; Blum, Florian; Gruhn, Volker Properties of Decentralized Consensus Technology - Why not every Blockchain is a Blockchain Artikel CoRR, abs/1907.09289 , 2019. @article{DBLP:journals/corr/abs-1907-09289, title = {Properties of Decentralized Consensus Technology - Why not every Blockchain is a Blockchain}, author = {Christopher Ehmke and Florian Blum and Volker Gruhn}, url = {http://arxiv.org/abs/1907.09289}, year = {2019}, date = {2019-01-01}, journal = {CoRR}, volume = {abs/1907.09289}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
2018 |
Meyer, Ole; Hesenius, Marc; Gries, Stefan; Wessling, Florian; Gruhn, Volker A decentralized architecture and simple consensus algorithm for autonomous agents Inproceedings Proceedings of the 12th European Conference on Software Architecture: Companion Proceedings, ECSA 2018, Madrid, Spain, September 24-28, 2018, S. 7:1–7:4, 2018. @inproceedings{DBLP:conf/ecsa/MeyerH0WG18, title = {A decentralized architecture and simple consensus algorithm for autonomous agents}, author = {Ole Meyer and Marc Hesenius and Stefan Gries and Florian Wessling and Volker Gruhn}, url = {https://doi.org/10.1145/3241403.3241413}, doi = {10.1145/3241403.3241413}, year = {2018}, date = {2018-01-01}, booktitle = {Proceedings of the 12th European Conference on Software Architecture: Companion Proceedings, ECSA 2018, Madrid, Spain, September 24-28, 2018}, pages = {7:1--7:4}, crossref = {DBLP:conf/ecsa/2018c}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Gries, Stefan; Meyer, Ole; Ollesch, Julius; Wessling, Florian; Hesenius, Marc; Gruhn, Volker Developing a Convenient and Fast to Deploy Simulation Environment for Cyber-Physical Systems Inproceedings 38th IEEE International Conference on Distributed Computing Systems, ICDCS 2018, Vienna, Austria, July 2-6, 2018, S. 1551–1552, 2018. @inproceedings{DBLP:conf/icdcs/0001MOWHG18, title = {Developing a Convenient and Fast to Deploy Simulation Environment for Cyber-Physical Systems}, author = {Stefan Gries and Ole Meyer and Julius Ollesch and Florian Wessling and Marc Hesenius and Volker Gruhn}, url = {https://doi.org/10.1109/ICDCS.2018.00166}, doi = {10.1109/ICDCS.2018.00166}, year = {2018}, date = {2018-01-01}, booktitle = {38th IEEE International Conference on Distributed Computing Systems, ICDCS 2018, Vienna, Austria, July 2-6, 2018}, pages = {1551--1552}, crossref = {DBLP:conf/icdcs/2018}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Gries, Stefan; Meyer, Ole; Wessling, Florian; Hesenius, Marc; Gruhn, Volker Using Blockchain Technology to Ensure Trustful Information Flow Monitoring in CPS Inproceedings 2018 IEEE International Conference on Software Architecture Companion, ICSA Companion 2018, Seattle, WA, USA, April 30 - May 4, 2018, S. 35–38, 2018. @inproceedings{DBLP:conf/icsa/0001MWHG18, title = {Using Blockchain Technology to Ensure Trustful Information Flow Monitoring in CPS}, author = {Stefan Gries and Ole Meyer and Florian Wessling and Marc Hesenius and Volker Gruhn}, url = {https://doi.org/10.1109/ICSA-C.2018.00014}, doi = {10.1109/ICSA-C.2018.00014}, year = {2018}, date = {2018-01-01}, booktitle = {2018 IEEE International Conference on Software Architecture Companion, ICSA Companion 2018, Seattle, WA, USA, April 30 - May 4, 2018}, pages = {35--38}, crossref = {DBLP:conf/icsa/2018c}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Wessling, Florian; Gruhn, Volker Engineering Software Architectures of Blockchain-Oriented Applications Inproceedings 2018 IEEE International Conference on Software Architecture Companion, ICSA Companion 2018, Seattle, WA, USA, April 30 - May 4, 2018, S. 45–46, 2018. @inproceedings{DBLP:conf/icsa/WesslingG18, title = {Engineering Software Architectures of Blockchain-Oriented Applications}, author = {Florian Wessling and Volker Gruhn}, url = {https://doi.org/10.1109/ICSA-C.2018.00019}, doi = {10.1109/ICSA-C.2018.00019}, year = {2018}, date = {2018-01-01}, booktitle = {2018 IEEE International Conference on Software Architecture Companion, ICSA Companion 2018, Seattle, WA, USA, April 30 - May 4, 2018}, pages = {45--46}, crossref = {DBLP:conf/icsa/2018c}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Wessling, Florian; Ehmke, Christopher; Hesenius, Marc; Gruhn, Volker How Much Blockchain Do You Need? Towards a Concept for Building Hybrid DApp Architectures Inproceedings 1st IEEE/ACM International Workshop on Emerging Trends in Software Engineering for Blockchain, WETSEB@ICSE 2018, Gothenburg, Sweden, May 27 - June 3, 2018, S. 44–47, 2018. @inproceedings{DBLP:conf/icse/WesslingEHG18, title = {How Much Blockchain Do You Need? Towards a Concept for Building Hybrid DApp Architectures}, author = {Florian Wessling and Christopher Ehmke and Marc Hesenius and Volker Gruhn}, url = {http://ieeexplore.ieee.org/document/8445058}, year = {2018}, date = {2018-01-01}, booktitle = {1st IEEE/ACM International Workshop on Emerging Trends in Software Engineering for Blockchain, WETSEB@ICSE 2018, Gothenburg, Sweden, May 27 - June 3, 2018}, pages = {44--47}, crossref = {DBLP:conf/icse/2018wetseb}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Gries, Stefan; Meyer, Ole; Ollesch, Julius; Wessling, Florian; Hesenius, Marc; Gruhn, Volker Developing a Cyber-Physical Autonomous and Distributed Intersection Management - A Software Engineer's Experience Report Inproceedings New Trends in Intelligent Software Methodologies, Tools and Techniques - Proceedings of the 17th International Conference SoMeT_18, Granada, Spain, 26-28 September 2018, S. 582–595, 2018. @inproceedings{DBLP:conf/somet/0001MOWHG18, title = {Developing a Cyber-Physical Autonomous and Distributed Intersection Management - A Software Engineer's Experience Report}, author = {Stefan Gries and Ole Meyer and Julius Ollesch and Florian Wessling and Marc Hesenius and Volker Gruhn}, url = {https://doi.org/10.3233/978-1-61499-900-3-582}, doi = {10.3233/978-1-61499-900-3-582}, year = {2018}, date = {2018-01-01}, booktitle = {New Trends in Intelligent Software Methodologies, Tools and Techniques - Proceedings of the 17th International Conference SoMeT_18, Granada, Spain, 26-28 September 2018}, pages = {582--595}, crossref = {DBLP:conf/somet/2018}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Ehmke, Christopher; Wessling, Florian; Friedrich, Christoph M Proof-of-Property - A Lightweight and Scalable Blockchain Protocol Inproceedings 1st IEEE/ACM International Workshop on Emerging Trends in Software Engineering for Blockchain, WETSEB@ICSE 2018, Gothenburg, Sweden, May 27 - June 3, 2018, S. 48–51, 2018. @inproceedings{DBLP:conf/icse/EhmkeWF18, title = {Proof-of-Property - A Lightweight and Scalable Blockchain Protocol}, author = {Christopher Ehmke and Florian Wessling and Christoph M Friedrich}, url = {http://ieeexplore.ieee.org/document/8445059}, year = {2018}, date = {2018-01-01}, booktitle = {1st IEEE/ACM International Workshop on Emerging Trends in Software Engineering for Blockchain, WETSEB@ICSE 2018, Gothenburg, Sweden, May 27 - June 3, 2018}, pages = {48--51}, crossref = {DBLP:conf/icse/2018wetseb}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
2017 |
Brückmann, Tobias; Gruhn, Volker; Koop, Wilhelm; Ollesch, Julius; Pradel, Lukas; Wessling, Florian; -, Marian Benner Codeless Engineering of Service Mashups - An Experience Report Inproceedings 2017 IEEE International Conference on Services Computing, SCC 2017, Honolulu, HI, USA, June 25-30, 2017, S. 402–409, 2017. @inproceedings{DBLP:conf/IEEEscc/BruckmannGKOPWB17, title = {Codeless Engineering of Service Mashups - An Experience Report}, author = {Tobias Brückmann and Volker Gruhn and Wilhelm Koop and Julius Ollesch and Lukas Pradel and Florian Wessling and Marian Benner{-}Wickner}, url = {https://doi.org/10.1109/SCC.2017.58}, doi = {10.1109/SCC.2017.58}, year = {2017}, date = {2017-01-01}, booktitle = {2017 IEEE International Conference on Services Computing, SCC 2017, Honolulu, HI, USA, June 25-30, 2017}, pages = {402--409}, crossref = {DBLP:conf/IEEEscc/2017}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Wessling, Florian; Gries, Stefan; Ollesch, Julius; Hesenius, Marc; Gruhn, Volker Engineering a Cyber-Physical Intersection Management - An Experience Report Inproceedings Ambient Intelligence - 13th European Conference, AmI 2017, Malaga, Spain, April 26-28, 2017, Proceedings, S. 17–32, 2017. @inproceedings{DBLP:conf/ami/WesslingGOHG17, title = {Engineering a Cyber-Physical Intersection Management - An Experience Report}, author = {Florian Wessling and Stefan Gries and Julius Ollesch and Marc Hesenius and Volker Gruhn}, url = {https://doi.org/10.1007/978-3-319-56997-0_2}, doi = {10.1007/978-3-319-56997-0_2}, year = {2017}, date = {2017-01-01}, booktitle = {Ambient Intelligence - 13th European Conference, AmI 2017, Malaga, Spain, April 26-28, 2017, Proceedings}, pages = {17--32}, crossref = {DBLP:conf/ami/2017}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Meyer, Ole; Ollesch, Julius; Gries, Stefan; Wessling, Florian; Gruhn, Volker Property-based routing in clustered message brokers for CPS: Doctoral Symposium Inproceedings Proceedings of the 11th ACM International Conference on Distributed and Event-based Systems, DEBS 2017, Barcelona, Spain, June 19-23, 2017, S. 366–369, 2017. @inproceedings{DBLP:conf/debs/MeyerOGWG17, title = {Property-based routing in clustered message brokers for CPS: Doctoral Symposium}, author = {Ole Meyer and Julius Ollesch and Stefan Gries and Florian Wessling and Volker Gruhn}, url = {https://doi.org/10.1145/3093742.3096475}, doi = {10.1145/3093742.3096475}, year = {2017}, date = {2017-01-01}, booktitle = {Proceedings of the 11th ACM International Conference on Distributed and Event-based Systems, DEBS 2017, Barcelona, Spain, June 19-23, 2017}, pages = {366--369}, crossref = {DBLP:conf/debs/2017}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Gruhn, Volker; Gries, Stefan; Hesenius, Marc; Ollesch, Julius; Rehman, Shafiq-Ur; Schwenzfeier, Nils; Wahl, Christian; Wessling, Florian Engineering Cyber-Physical Systems Inproceedings New Trends in Intelligent Software Methodologies, Tools and Techniques - Proceedings of the 16th International Conference, SoMeT_17, Kitakyushu City, Japan, September 26-28, 2017, S. 3–18, 2017. @inproceedings{DBLP:conf/somet/Gruhn0HORSWW17, title = {Engineering Cyber-Physical Systems}, author = {Volker Gruhn and Stefan Gries and Marc Hesenius and Julius Ollesch and Shafiq-Ur Rehman and Nils Schwenzfeier and Christian Wahl and Florian Wessling}, url = {https://doi.org/10.3233/978-1-61499-800-6-3}, doi = {10.3233/978-1-61499-800-6-3}, year = {2017}, date = {2017-01-01}, booktitle = {New Trends in Intelligent Software Methodologies, Tools and Techniques - Proceedings of the 16th International Conference, SoMeT_17, Kitakyushu City, Japan, September 26-28, 2017}, pages = {3--18}, crossref = {DBLP:conf/somet/2017}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |