References of "Sedlmeir, Johannes"
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See detailThe DLPS: A New Framework for Benchmarking Blockchains
Sedlmeir, Johannes; Ross, Philipp; Luckow, André et al

in Proceedings of the 54th Hawaii International Conference on System Sciences (2021)

Distributed Ledger Technologies (DLT) promise to revolutionize business ecosystems by permitting secure transactions without intermediaries. A widely recognized challenge that inhibits the uptake of DLT ... [more ▼]

Distributed Ledger Technologies (DLT) promise to revolutionize business ecosystems by permitting secure transactions without intermediaries. A widely recognized challenge that inhibits the uptake of DLT is scalability and performance. Hence, quantifying key metrics such as throughput and latency is crucial for designing DLT-based infrastructures, applications, and ecosystems. However, current benchmarking frameworks for blockchains do not cover the whole benchmarking process; impeding transparent comparisons of different DLT networks. In this paper, we present the Distributed Ledger Performance Scan (DLPS), an open-source framework for end-to-end performance characterizations of blockchains, addressing the need to transparently and automatically evaluate the performance of highly customizable configurations. We describe our new framework and argue that it significantly improves existing DLT benchmarking solutions. To demonstrate the capabilities of the DLPS, we also summarize the main results obtained from a series of experiments that we have conducted with it, giving a first comprehensive comparison of essential scalability properties of several commonly used enterprise blockchains. [less ▲]

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See detailEin Blick auf aktuelle Entwicklungen bei Blockchains und deren Auswirkungen auf den Energieverbrauch
Sedlmeir, Johannes; Ulrich Buhl, Hans; Fridgen, Gilbert UL et al

in Informatik-Spektrum (2020)

The enormous power consumption of Bitcoin has led to undifferentiated discussions in science and practice about the sustainability of blockchain and distributed ledger technology in general. However ... [more ▼]

The enormous power consumption of Bitcoin has led to undifferentiated discussions in science and practice about the sustainability of blockchain and distributed ledger technology in general. However, blockchain technology is far from homogeneous—not only with regard to its applications, which now go far beyond cryptocurrencies and have reached businesses and the public sector, but also with regard to its technical characteristics and, in particular, its power consumption. This paper summarizes the status quo of the power consumption of various implementations of blockchain technology, with special emphasis on the recent ‘‘Bitcoin Halving’’ and so-called ‘‘zk-rollups’’. We argue that although Bitcoin and other proof-of-work blockchains do indeed consume a lot of power, alternative blockchain solutions with significantly lower power consumption are already available today, and new promising concepts are being tested that could further reduce in particulary the power consumption of large blockchain networks in the near future. From this we conclude that although the criticism of Bitcoin’s power consumption is legitimate, it should not be used to derive an energy problem of blockchain technology in general. In many cases in which processes can be digitized or improved with the help of more energy-efficient blockchain variants, one can even expect net energy savings. [less ▲]

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See detailThe Energy Consumption of Blockchain Technology: Beyond Myth
Sedlmeir, Johannes; Ulrich Buhl, Hans; Fridgen, Gilbert UL et al

in Business and Information Systems Engineering (2020)

When talking about blockchain technology in academia, business, and society, frequently generalizations are still heared about its – supposedly inherent – enormous energy consumption. This perception ... [more ▼]

When talking about blockchain technology in academia, business, and society, frequently generalizations are still heared about its – supposedly inherent – enormous energy consumption. This perception inevitably raises concerns about the further adoption of blockchain technology, a fact that inhibits rapid uptake of what is widely considered to be a groundbreaking and disruptive innovation. However, blockchain technology is far from homogeneous, meaning that blanket statements about its energy consumption should be reviewed with care. The article is meant to bring clarity to the topic in a holistic fashion,looking beyond claims regarding the energy consumption of Bitcoin, which have, so far, dominated the discussion. [less ▲]

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See detailIT-based Architecture for Power Market Oriented Optimization at Multiple Levels in Production Processes
Seitz, Philipp; Abele, Eberhard; Bank, Lukas et al

in Procedia CIRP (2019), 81

Given the increasingly volatile prices on the power markets, it becomes economically more and more important for companies to develop and realize flexible strategies for energy consumption. A steady ... [more ▼]

Given the increasingly volatile prices on the power markets, it becomes economically more and more important for companies to develop and realize flexible strategies for energy consumption. A steady adaption of production processes which considers current power prices can take place on several levels of the automation pyramid, where each level has its own characteristics and requirements. In this paper, we present an optimization architecture based on an IT-platform which meets the challenges of complex multilayered production processes. We introduce layer-specific optimization strategies as well as an associated information flow, which facilitates creating holistic and well-coordinated optimizations. [less ▲]

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See detailA Generic Data Model for Describing Flexibility in Power Markets
Schott, Paul; Sedlmeir, Johannes; Strobel, Nina et al

in Energies (2019), 12(10),

In this article, we present a new descriptive model for industrial flexibility with respect to power consumption. The advancing digitization in the energy sector opens up new possibilities for utilizing ... [more ▼]

In this article, we present a new descriptive model for industrial flexibility with respect to power consumption. The advancing digitization in the energy sector opens up new possibilities for utilizing and automatizing the marketing of flexibility potentials and therefore facilitates a more advanced energy management. This requires a standardized description and modeling of power-related flexibility. The data model in this work has been developed in close collaboration with several partners from different industries in the context of a major German research project. A suitable set of key figures allows for also describing complex production processes that exhibit interdependencies and storage-like properties. The data model can be applied to other areas as well, e.g., power plants, plug-in electric vehicles, or power-related flexibility of households. [less ▲]

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See detailIndustrie 4.0 als Befähiger für Energieflexibilität
Bauernhansl, Thomas; Bauer, Dennis; Abele, Eberhard et al

in Energieflexibilität in der deutschen Industrie : Ergebnisse aus dem Kopernikus-Projekt - Synchronisierte und energieadaptive Produktionstechnik zur flexiblen Ausrichtung von Industrieprozessen auf eine fluktuierende Energieversorgung (SynErgie) (2019)

Energy from renewable resources is not always readily available. Depending on the season and the weather, the power made available by solar parks or wind turbines varies, for example. Due to the ... [more ▼]

Energy from renewable resources is not always readily available. Depending on the season and the weather, the power made available by solar parks or wind turbines varies, for example. Due to the continuous expansion of renewable energies, the volatility in the energy system will become more and more pronounced in the future. Preparing and adapting the industry to the changing supply structures is a major challenge for the next few decades. In the future, companies must be able to design their processes and operational organization in such a way that energy consumption can at least partially adapt flexibly to the volatile energy supply. In addition to developing technologies, Concepts and measures to make industrial processes more energetic, a second focus of future work is the development of a consistent IT infrastructure with which companies and energy providers can provide and exchange information from the production machine to the energy markets in the future. This leads to a paradigm shift in the operation of industrial processes - away from continuous and purely demand-driven energy consumption towards the adaptable, energy-flexible operation of industrial plants. This reference work presents the most important results of the research in the context of the Kopernikus project Synergy and clarifies trend-setting findings for further developments in the still young field of industrial energy flexibility. [less ▲]

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See detailChancen und Herausforderungen von DLT (Blockchain) in Mobilität und Logistik
Fridgen, Gilbert UL; Guggenberger, Nikolas; Hoeren, Thomas et al

Book published by Federal Ministry of Transport and Digital Infrastructure (2019)

This basic report presents the economic potential e, the legal framework and the technical fundamentals of distributed ledger or blockchain technology necessary for understanding in order to exploit the ... [more ▼]

This basic report presents the economic potential e, the legal framework and the technical fundamentals of distributed ledger or blockchain technology necessary for understanding in order to exploit the opportunities and challenges of these technologies, especially in the mobility and logistics sector. clear. The basic report was prepared on behalf of the Federal Ministry of Transport and Digital Infrastructure (BMVI) by the blockchain laboratory of Fraunhofer FIT. [less ▲]

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See detailOpportunities and Challenges of DLT (Blockchain) in Mobility and Logistics
Fridgen, Gilbert UL; Guggenberger, Nikolas; Hoeren, Thomas et al

Report (2019)

This report presents the economic potential, legal framework, and technical foundations required to understand distributed ledger (DL) / blockchain technology and llustrates the opportunities and ... [more ▼]

This report presents the economic potential, legal framework, and technical foundations required to understand distributed ledger (DL) / blockchain technology and llustrates the opportunities and challenges they present, especially in the mobility and logistics sectors. It was compiled by the blockchain laboratory at Fraunhofer FIT on behalf of the German Federal Ministry of Transport and Digital Infrastructure (BMVI). Its intended audience comprises young companies seeking, for example, a legal assessment of data protection issues related to DL and blockchain technologies, decisionmakers in the private sector wishing concrete examples to help them understand how this technology can impact existing and emerging markets and which measures might be sensible from a business perspective, public policymakers and politicians wishing to familiarize themselves with this topic in order to take a position, particularly in the mobility and logistics sectors, and members of the general public interested in the technology and its potential. The report does not specifically address those with a purely academic or scientific interest in these topics, although parts of it definitely reflect the current state of academic discussion. [less ▲]

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See detail(How) Can Blockchain Contribute to the Management of Systemic Risks in Global Supply Networks?
Fridgen, Gilbert UL; Körner, Marc-Fabian; Sedlmeir, Johannes et al

in 14. Internationale Tagung Wirtschaftsinformatik (2019)

Even though globalization has led to larger, faster, and more efficient supply chains, at the same time the new worldwide interconnection has also resulted in major challenges with respect to hidden ... [more ▼]

Even though globalization has led to larger, faster, and more efficient supply chains, at the same time the new worldwide interconnection has also resulted in major challenges with respect to hidden systemic risks. In particular, there is a lack of a holistic perspective on the entire supply network. This missing global view prohibits the anamnesis and management of underlying risks. Against this backdrop, in this paper we discuss the potential contributions of Blockchain technology to systemic risk management in global supply chains and networks. Given the increasing number of recent initiatives of businesses in the context of Blockchain, we argue that Blockchain technology can lower the hurdle for the use of secure multiparty computation. Ultimately, it may be possible to implement a corresponding monitoring mechanism for systemic risks without (i) the need of a central authority and (ii) revealing competition relevant, confidential information to other supply network participants. [less ▲]

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