| 1. |
- Chen, C., et al.
(author)
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An implicit boundary integral method for interfaces evolving by Mullins-Sekerka dynamics
- 2017
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In: Springer Proceedings in Mathematics and Statistics. - Cham : Springer New York LLC. - 9783319667621 ; , s. 1-21
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Conference paper (peer-reviewed)abstract
- We present an algorithm for computing the nonlinear interface dynamics of the Mullins-Sekerka model for interfaces that are defined implicitly (e.g. by a level set function) using integral equations. The computation of the dynamics involves solving Laplace’s equation with Dirichlet boundary conditions on multiply connected and unbounded domains and propagating the interface using a normal velocity obtained from the solution of the PDE at each time step. Our method is based on a simple formulation for implicit interfaces, which rewrites boundary integrals as volume integrals over the entire space. The resulting algorithm thus inherits the benefits of both level set methods and boundary integral methods to simulate the nonlocal front propagation problem with possible topological changes. We present numerical results in both two and three dimensions to demonstrate the effectiveness of the algorithm.
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| 2. |
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| 3. |
- Grabis, Jänis, et al.
(author)
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Endurant Ecosystems : Model-Based Assessment of Resilience of Digital Business Ecosystems
- 2022
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In: Perspectives in Business Informatics Research - 21st International Conference on Business Informatics Research, BIR 2022, Rostock, Germany, September 21-23, 2022, Proceedings. - Cham : Springer International Publishing. - 9783031169465 - 9783031169472 ; , s. 53-68
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Conference paper (peer-reviewed)abstract
- Information Systems (IS) of modern organizations and enterprises often rely on a network of partners’ IS to deliver the services. The resilience of this network is the necessary condition for the operation of such ISs. The Digital Business Ecosystem (DBE) theory has emerged as an approach to ensure functioning and resilience in dynamic and open networks. This paper presents three cases of analysis of resilience of DBEs. The objective of the analysis is to assess the resilience of DBEs during its design phase. During this phase, often, only structural information presented in ISs models is available. In order to assess the resilience, the DBE models are analyzed for the potential for fulfilment of typical ecosystem goals and roles. The three DBE cases analyzed are winter road maintenance, digital vaccine, and Covid-19 testing. The paper evaluates the resilience of the DBEs and formulates the practices for uncovering and strengthening it.
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| 4. |
- Tsai, Chen Hsi, et al.
(author)
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A Foundation for Design, Analysis, and Management of Digital Business Ecosystem through Situational Method Engineering
- 2021
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In: The Practice of Enterprise Modeling. - Cham : Springer. - 9783030912789 - 9783030912796 ; , s. 134-149
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Conference paper (peer-reviewed)abstract
- Digital Business Ecosystem (DBE) supports organizations to combine their expertise in a novel collaborative network through information and communications technology. Despite its beneficial aspects, a DBE is intricate and difficult to manage due to the dependent interactions and interrelationships among actors. Modelling, as a proven way to deal with complex problems in organisational settings, can support the capturing and documenting of a DBE. This can enhance the level of abstraction of the DBE to aid the analysis and decision-making. However, current scientific literature shows a lack of methodological guidance for modelling in support of the analysis, design, and management of DBEs. Hence, in this study, we have proposed a foundation for a DBE design, analysis, and management method based on Situational Method Engineering (SME). Using the requirements empirically collected from a number of industrial practitioners and experts, the main concepts and intentions relevant to DBE design, analysis and management were defined. Based on them, using the SME approach, we modelled and presented several method process parts that layout fulfilment of the intentions for the concepts’ development using different, situation-related, strategies (i.e. method chunks).
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| 5. |
- Tsai, Chen Hsi, et al.
(author)
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A Meta-model for Digital Business Ecosystem Design
- 2023
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In: Research Challenges in Information Science: Information Science and the Connected World. - : Springer. - 9783031330797 - 9783031330803 ; , s. 559-567
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Conference paper (peer-reviewed)abstract
- The Digital Business Ecosystem (DBE) theory has evolved to facilitate the functioning of open business networks by adopting the ecosystem paradigm from nature in a shared digital environment. While it enables exhibiting diverse interests, it also places high demands on managing the DBE’s resilience. The current research lacks support for how a DBE-based business model can be integrated with its supporting information system’s data structure to enable the design and monitoring of resilience for indicating the needed adaptations caused by changes in DBE’s actors, their engagement or performance balance. We propose and instantiate a meta-model that describes the DBE’s entities relevant to its design using the CIVIS ecosystem. The meta-model provides a foundation for a modelling language for the management of the resilience of DBE.
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| 6. |
- Tsai, Chen Hsi
(author)
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A Method for Designing Resilient Digital Business Ecosystems
- 2023
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Licentiate thesis (other academic/artistic)abstract
- Organisations and companies are transforming their ways of conducting business by combining digitalisation and digital collaboration in digital business ecosystems (DBE) in order to be able to remain competitive in global markets. However, for companies and organisations to be able to take full advantage of such collaborative business constellations, several challenges, including the capture and coordination of information concerning individual DBE actors and various perspectives of a DBE and the design of resilience for a DBE, need to be addressed. Enterprise Modelling has proved to be useful in capturing and documenting organisational designs and hence it can offer support in tackling these challenges in terms of capturing and depicting abstract representations of DBEs. Several modelling approaches have already been proposed for this purpose, yet they address the challenge only partially. For example, they do not address explicitly the specific contexts in which DBEs operate, the various perspectives of their design, or the resilience of DBEs.This thesis follows Design Science research with the aim of establishing a modelling method for the design, analysis, and management of resilient digital business ecosystems. The modelling method as a design artefact provides methodological support in capturing, understanding, and documenting DBEs’ various perspectives and resilience.A systematic literature review was conducted for the initial problem explication to explore the modelling approaches presented in DBE-related studies. A survey on DBE roles and prototyping sessions of modelling the resilience in a healthcare DBE case contributed also to the problem explication. The findings suggested an immature state of the art of DBE modelling and the need for a holistic modelling method integrating the various perspectives, resilience, and DBE roles.The suggested list of DBE roles based on the survey and the requirements derived from experts’ opinions served as the input (requirements) for the design and development of the artefact. Using Situational Method Engineering, we proposed the process of the DBE modelling method in module maps. The module maps and the resilient modelling components as parts of the design artefact contributed as the basis for the development of the complete DBE modelling method.Future work will focus on the iterative cycles for the remaining two artefact components, the meta-model and the mapping of existing methods with the proposed DBE modelling method, and the evaluation of the complete design artefact concerning the entire doctoral research project.
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| 7. |
- Tsai, Chen Hsi, et al.
(author)
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A method for digital business ecosystem design : situational method engineering in an action research project
- 2023
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In: Software and Systems Modeling. - : Springer Science and Business Media LLC. - 1619-1366 .- 1619-1374. ; 22:2, s. 573-598
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Journal article (peer-reviewed)abstract
- Digital business ecosystem (DBE) is a paradigm that enables developing and monitoring novel business models of collaborating organisations and individuals using ICT as the foundation. Different from traditional online networked models such as manufacturer, retailer, or franchise centred, using a shared digital environment, DBE fosters heterogeneity, symbiosis, coevolution, and self-organisation of its multiple actors, which enables it to span different business domains as well as exhibits diverse interests. For many organisations and individuals, DBE presents a new collaborative approach to leverage offered and desired resources among the involved members to meet each of their goals. As such, it is foreseen to be of high value to the involved actors, but at the same time, it is often complex due to many correlated interactions of these actors and thus difficult to design and manage. Furthermore, the current state of the art shows a lack of methodological guidance for DBE design. We propose a method for DBE design that follows the requirements collected from industry experts and practitioners by applying situational method engineering to enable its modularised design. The method for design is validated by action research in the setting of Digital Vaccine, a Swedish DBE managing health-related services.
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| 8. |
- Tsai, Chen Hsi, et al.
(author)
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A Survey of Roles and Responsibilities in Digital Business Ecosystems
- 2020
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In: Proceedings of the Forum at Practice of Enterprise Modeling 2020 co-located with the 13th IFIP WG 8.1 Working Conference on the Practice of Enterprise Modeling (PoEM 2020). - : RWTH Aachen University. ; , s. 44-53
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Conference paper (peer-reviewed)abstract
- Digital Business Ecosystem is an emerging phenomenon aimed to reflect the behavior of natural ecosystems as a networked and online business model involving heterogeneous actors being engaged in a shared business vision and its implementation. Such as in an ecosystem, in a DBE, the actors are highly dependent on each other in terms of their capabilities and resources. It is, therefore, one of the essential needs for the research on DBEs to advance in understanding of which roles and responsibilities are entailed in enabling a DBE to function and sustain on a long-term basis. We have, in this study, performed a survey on the existing scientific studies related to the roles within DBEs, classified the collected results, and integrated them to a unified proposal. Using a recently developed and functioning DBE concerning the improvement of preventive healthcare by provisioning, exchanging, and using of a set of relevant resources, we have presented an initial validation of the correctness and fit of the proposal for the roles of actors and their responsibilities.
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| 9. |
- Tsai, Chen Hsi, et al.
(author)
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Capability Management of Digital Business Ecosystems – A Case of Resilience Modeling in the Healthcare Domain
- 2020
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In: Advanced Information Systems Engineering. - Cham : Springer. - 9783030581343 - 9783030581350 ; , s. 126-137
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Conference paper (peer-reviewed)abstract
- Significant amount of business collaboration takes place online which supports efficient and dynamic business partnerships. Once such partnerships reach a critical mass, a digital business ecosystem (DBE) forms. While it is beneficial to its actors, it is also complex and more difficult to manage. A key management concern is resilience, especially in the context of digitalization. The relevant goals influencing the DBE resilience are diversity, efficiency, adaptability, and cohesion, which need to be aligned with business goals of a specific DBE and managed accordingly. To this end, the paper investigates the suitability of capability management for the purpose of analyzing DBEs to support resilience and demonstrates capability models for a digital health use case in the healthcare sector.
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| 10. |
- Tsai, Chen Hsi, et al.
(author)
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Model-Based Digital Business Ecosystems : A Method Design
- 2023
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In: Perspectives in Business Informatics Research. - : Springer. - 9783031431258 - 9783031431265 ; , s. 214-228
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Conference paper (peer-reviewed)abstract
- In traditional business models, organisations typically work independently and have limited interactions with other entities in the network. In contrast, Digital Business Ecosystems (DBE) foster collaboration, responsibility-taking, and resource sharing between multiple actors, enabling them to leverage their capabilities. Such characteristics require in return well-thought approaches for identification and design of the DBE components and tasks unified in an underlying digital environment. In this study, we address this challenge by proposing a modular model-based method for design of DBE that uses Situational Method Engineering as the underlying methodology and meta-models that describe the concepts and relationships on the modular level. We have illustrated some applications of the method and design task with existing enterprise architecture and enterprise modelling approaches.
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