Blockchain is a new, foundational technology with a vast amount of application possibilities. However, practitioners might not be aware of which use cases in their own business model might benefit from blockchain technology. To aid them in analyzing their business regarding blockchain suitability, this paper introduces a use case identification framework for blockchain and a use case canvas. In the development process they have been evaluated with internal and external reviews in order to offer the best possible guidance. In combination they offer an analysis framework to help practitioners decide which use cases they should take into account for blockchain technology, which characteristics these blockchain implementations would have, and which specific advantages they would offer.
After its first prominent application as part of the digital currency Bitcoin, blockchain technology is gaining in popularity. It comprises a chain of blocks (the ledger) that provides a secure, immutable and auditable list of ordered records. Using both cryptography and a distributed database, once a block is recorded, it can no longer be changed. In Bitcoin's case, the ledger contains the history of all currency transactions. This paper offers a critical overview of the blockchain technology for an interaction design audience, in three parts: (1) The principles making block-chain technology possible are briefly explained using examples. (2) Specific cases such as food provenance and supply chain tracing, are used to illustrate both the wide array of possible applications and the profound implications of blockchain technology. (3) Opportunities and challenges for HCI and interaction design are discussed in the form of a nascent research agenda.
Matthias Stuermer, Gabriel Abu-Tayeh, Thomas Myrach
The modern age has heralded a shift from the industrial society, in which natural resources are crucial input factors for the economy, towards a knowledge society. To date, sustainability literature has treated knowledge-and in particular digital artifacts-mainly as a means to the end of achieving sustainable development. In this conceptual paper, we argue that digital artifacts themselves ought also to be considered as resources, which also need to be sustainable. While over-consumption is a problem facing natural resources, with sustainable digital artifacts, underproduction, and underuse are the biggest challenges. In our view, the sustainability of digital artifacts improves their potential impact on sustainable development. A theoretical foundation for digital artifacts and their ecosystem allows us to present the relevant research on digital information, knowledge management, digital goods, and innovation literature. Based on these insights, we propose ten basic conditions for sustainable digital artifacts and their ecosystem to ensure that they provide the greatest possible benefit for sustainable development. We then apply those characteristics to four exemplary cases: Linux kernel development, Bitcoin cryptocurrency, the Wikipedia project, and the Linking Open Drug Data repositories. The paper concludes with a research agenda identifying topics for sustainability scholars and information systems academics, as well as practitioners. A number of suggestions for future studies on digital sustainability are also put forward.
The rapid development of the blockchain technology and its various applications has rendered it important to understand the guidelines for adopting it. The comparative analysis method is used to analyze different dimensions of the maturity model, which is mainly based on the commonly used capability maturity model. The blockchain maturity model and its adoption process have been discussed and presented. This study serves as a guide to institutions to make blockchain adoption decisions more systematically.
Roman Matzutt, Oliver Hohlfeld, Martin Henze, Robin Rawiel · 6 authors
As transaction fees skyrocket today, blockchains become increasingly expensive, hurting their adoption in broader applications. This work tackles the saving of transaction fees for economic blockchain applications. The key insight is that other than the existing "default'' mode to execute application logic fully on-chain, i.e., in smart contracts, and in fine granularity, i.e., user request per transaction, there are alternative execution modes with advantages in cost-effectiveness. On Ethereum, we propose a holistic middleware platform supporting flexible and secure transaction executions, including off-chain states and batching of user requests. Furthermore, we propose control-plane schemes to adapt the execution mode to the current workload for optimal runtime cost. We present a case study on the institutional accounts (e.g., coinbase.com) intensively sending Ether on Ethereum blockchains. By collecting real-life transactions, we construct workload benchmarks and show that our work saves 18%\sim 47%18%-47% per invocation than the default baseline while introducing 1.81%\sim 16.59%1.81%-16.59% blocks delay.
This thesis is divided into eight sections that contextualize and illustrate the market potential for commercial PPA solar leasing on mid-sized commercial roofs in the US.First, a discussion of the drawbacks from fossil fuel reliance reveals the benefits of solar energy.The second section explains the photovoltaic effect and the process through which sunlight is converted to electricity.From that foundation, the theoretical solar dependence in the US is then contrasted with current energy consumption.The disparity shown to be the result of such large-scale challenges as the reliance on peak power plants, unavoidable heat losses and other problems stemming from the lack of a decentralized grid infrastructure.By factoring in these challenges, a commercialization strategy for mid-sized commercial photovoltaics business is realized, which logically leads to a discussion of the cost trends of photovoltaic modules and parts.Understanding costs gives rise to an examination of potential pricing options in the following section, along with breakeven analyses.Lastly, a discussion of the developments of the solar industry shows that traditional silicon wafer cells are the least expensive and most efficient technology available, and that a hypothetical company serving enterprise-class data centers in the state Ohio will break even in 9 years with optimal debt financing.
Large-scale deployment of reliable smart electricity metering networks has been considered as the first step towards a smart, integrated and efficient grid. On the consumer’s side, however, the real impact is still uncertain and limited. This paper evaluates the consumer’s perspective in the city of Västerås, Sweden, where full implementation of smart meters has been reached. New services, such as consumption feedback and the possibility to choose dynamic electricity pricing contracts, have been available from the adoption of this infrastructure. A web-based survey evaluating customers’ perception of these new services was carried out. The survey included consumers’ personal information, preferences about the type of information and the frequency of delivery and the preference for electricity pricing contracts. The results showed that the electricity consumption information offered by distribution system operators (DSOs) today is not detailed enough for customers to react accordingly. Additionally, while variable pricing contracts are becoming more popular, the available pricing schemes do not encourage customers to increase their consumption flexibility. Therefore, more detailed information from the smart meters should be made available, including disaggregated electricity consumption per appliance that would allow consumers to have more control over their energy consumption activities.
This proposal is to exhibit the work named Crypto Heater which is part of a design fiction [c.f 1,5,8:30] series intended to explore a near future world in which cryptographic currencies such as Bitcoin [6] have become commonplace. This work opens up space for discussion about the activities of the distributed peer-to-peer network of so-called "miners" that ensure the security of the Bitcoin network and regulate the supply of new currency in the Bitcoin economy. The physical part of the work (the heater itself) is set within a fictional near-future reality. In this reality, Bitcoin has become central to our financial service industry, and "mining" in domestic settings is promoted by the government, as a means of heating our homes and to ensure security of the network. A "story world" is constructed using devices such as promotional materials from the UK Government's Ministry of Crypto Currency; technical specifications; customer testimonials; and the heater itself. The main element of the exhibit is a fully working Crypto Heater prototype. This device is (in the fictional world, and the real world) part of the distributed network of Bitcoin miners. Through computation, it converts electrical energy into cryptographic currency. Uniquely Crypto Heater dissipates the heat energy (a by-product of the computational effort required to be a Bitcoin miner) through a standard household radiator. By offsetting the value of the cryptographic currency produced, against the cost of electricity used, the heater provides subsidized domestic heating.
Are there differences between the sale of an unopened Super Mario Bros. computer game and of the digital collage of 5,000 images? Viewed from the perspective of the doctrine of exhaustion, we can easily conclude that the two transfers have significant differences. The auction of the tangible data carrier of the Super Mario’s 1986 edition (for $660,000) 1 fits well into the doctrine. The auction of the NFT (non-fungible token) representing Beeple’s “Everdays: the First 5000 Days” (for an equivalent of an astounding $69.3 million) 2 seems to be hype with a snowball effect rather than a modern encapsulation of digital exhaustion. Some commentators, 3 including the present author in collaboration with Alexandra Giannapoulou, João Pedro Quintais, and Balázs Bodó, 4 have thoroughly introduced the incompatibility of the NFT mania with the existing copyright status quo, and so – in connection with the present book’s topic – the sale of tokenized information, which is capable of representing information related to digital artworks, is practically excluded from the scope of the exhaustion of the right of distribution. At the same time, NFTs de facto offer a “code-based digital ecosystem that has practical consequences for the copyright-relevant fields of creativeness.” 5 The sale and resale of NFTs is possible; an exchange of information and title to “own” and “trade” information related to copyrightable subject matter is technologically guaranteed. In line with that, a quasi-exhaustion regime has also emerged. As such, the NFT mania can practically evidence the need for and modern technology’s capability of offering digital marketplaces for artworks as well.
With the present residential electricity usage pattern, the power grid is not efficiently utilized. To avoid the need of grid expansion as a result of increasing power demand, a framework that works on behalf of both power utilities and consumers is needed. Such a framework consisting of a trustworthy adaptable smart home energy system and electricity contracts is presented. The system adapts energy usage in the home according to factors such as electricity prices, electricity contracts, and electricity usage control requests from the power utilities. The proposed contract defines pricing elements as well as the well-being of the consumer, comprising comfort and freedom to use electricity.