scholarly journals Blockchain Based Transaction System with Fungible and Non-Fungible Tokens for a Community-Based Energy Infrastructure

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3822
Author(s):  
Nikita Karandikar ◽  
Antorweep Chakravorty ◽  
Chunming Rong

Renewable energy microgeneration is rising leading to creation of prosumer communities making it possible to extract value from surplus energy and usage flexibility. Such a peer-to-peer energy trading community requires a decentralized, immutable and access-controlled transaction system for tokenized energy assets. In this study we present a unified blockchain-based system for energy asset transactions among prosumers, electric vehicles, power companies and storage providers. Two versions of the system were implemented on Hyperledger Fabric. Assets encapsulating an identifier or unique information along with value are modelled as non-fungible tokens (NFT), while those representing value only are modelled as fungible tokens (FT). We developed the associated algorithms for token lifecycle management, analyzed their complexities and encoded them in smart contracts for performance testing. The results show that performance of both implementations are comparable for most major operations. Further, we presented a detailed comparison of FT and NFT implementations based on use-case, design, performance, advantages and disadvantages. Our implementation achieved a throughput of 448.3 transactions per second for the slowest operation (transfer) with a reasonably low infrastructure.

2021 ◽  
Author(s):  
Nikita Rajendra Karandikar

Integration of solar micro-generation capabilities in domestic contexts is on the rise, leading to the creation of prosumer communities who generate part of the energy they consume. Prosumer communities require a decentralized, transparent and immutable transaction system in order to extract value from their surplus energy generation and usage flexibility. The aim of this study is to develop frameworks and methods to create such a prosumer transaction system with self enforcing smart contracts to facilitate trading of energy assets such as electricity units, energy flexibility incentives and storage credits. Blockchain is a transparent, distributed ledger for consensus based transaction processing maintained by a network of peer nodes. Hyperledger Fabric is a blockchain platform that offers the added benefits of lower operating cost, faster transaction processing, user authentication based access control and support for self enforcing smart contracts. This thesis investigates the applicability of Hyperledger Fabric to tokenize and transact energy assets in a unified transaction system. Data driven approaches to implement an incentive based energy flexibility system for peak mitigation on the blockchain are also investigated. To this end, the stakeholders for such a transaction management system were identified and their business relationships and interactions were described. Energy assets were encapsulated into blockchain tokens and algorithms were developed and encoded into self enforcing smart contracts based on the stakeholder relationships. A unified transaction framework was proposed that would bring on board all the stakeholders, their trading relationships and the assets being transacted. Tokens and methods in the transaction system were implemented in fungible and non fungible versions and the versions were critically compared in terms of application area, design, algorithmic complexity, performance, advantages and disadvantages. Further, with a focus on energy flexibility applications, a prosumer research dataset was analysed to gain insights into the production and consumption behaviors. Based on these insights, a data driven approach for peak mitigation was proposed and implemented on the Hyperledger Fabric blockchain. The thesis thus addresses different aspects of a blockchain based prosumer transaction system, and shows the feasibility of proposed approaches through implementation and performance testing of proofs of concept.


2021 ◽  
Vol 3 (2) ◽  
pp. 474-489
Author(s):  
Carlo Cunanan ◽  
Manh-Kien Tran ◽  
Youngwoo Lee ◽  
Shinghei Kwok ◽  
Vincent Leung ◽  
...  

Greenhouse gas emissions from the freight transportation sector are a significant contributor to climate change, pollution, and negative health impacts because of the common use of heavy-duty diesel vehicles (HDVs). Governments around the world are working to transition away from diesel HDVs and to electric HDVs, to reduce emissions. Battery electric HDVs and hydrogen fuel cell HDVs are two available alternatives to diesel engines. Each diesel engine HDV, battery-electric HDV, and hydrogen fuel cell HDV powertrain has its own advantages and disadvantages. This work provides a comprehensive review to examine the working mechanism, performance metrics, and recent developments of the aforementioned HDV powertrain technologies. A detailed comparison between the three powertrain technologies, highlighting the advantages and disadvantages of each, is also presented, along with future perspectives of the HDV sector. Overall, diesel engine in HDVs will remain an important technology in the short-term future due to the existing infrastructure and lower costs, despite their high emissions, while battery-electric HDV technology and hydrogen fuel cell HDV technology will be slowly developed to eliminate their barriers, including costs, infrastructure, and performance limitations, to penetrate the HDV market.


2002 ◽  
Vol 34 (3) ◽  
pp. 247-259
Author(s):  
Dragica Minic-Popovic ◽  
M.V. Susic

Once hydrogen is generated, the question asked: How do we store hydrogen? Hydrogen can be stored in a variety of ways, each with specific advantages and disadvantages. The overall criteria for choosing a storage method should be safety and ease of use. Described in this paper and listed below are different storage methods available today (compressed hydrogen, liquid carrier storage, glass microsphere, chemically stored hydrogen) in addition to some techniques that are still in the research and development stage: power balls, metal hydride tanks and carbon clusters.


Author(s):  
O. Gertsiy

The main characteristics of graphic information compression methods with losses and without losses (RLE, LZW, Huffman's method, DEFLATE, JBIG, JPEG, JPEG 2000, Lossless JPEG, fractal and Wawelet) are analyzed in the article. Effective transmission and storage of images in railway communication systems is an important task now. Because large images require large storage resources. This task has become very important in recent years, as the problems of information transmission by telecommunication channels of the transport infrastructure have become urgent. There is also a great need for video conferencing, where the task is to effectively compress video data - because the greater the amount of data, the greater the cost of transmitting information, respectively. Therefore, the use of image compression methods that reduce the file size is the solution to this task. The study highlights the advantages and disadvantages of compression methods. The comparative analysis the basic possibilities of compression methods of graphic information is carried out. The relevance lies in the efficient transfer and storage of graphical information, as big data requires large resources for storage. The practical significance lies in solving the problem of effectively reducing the data size by applying known compression methods.


2021 ◽  
Author(s):  
Sarah Ann Ernisse

This practical thesis project report contains a conservation survey, condition report and collections care proposal for the World War I portrait collection at State Records of South Australia. The plan prescribes immediate, short term and long term recommendations for the improvement of preservation techniques for the World War I collection. The paper also contains information and results gathered through the condition report of the collection sample and conservation survey. The survey investigated the current environment and storage facilities, access, security and disaster planning surrounding the collection. The paper also outlines the practices and methodologies of the applied thesis for both the conservation survey and condition report. The collection care proposal assesses current practices in order to provide State Records with accurate goals that offer flexible options. A detailed list of housing recommendations is included in the proposal; an advantages and disadvantages assessment if included for each option to help State Records better fit its needs and abilities in the future. Charts showing the results of the condition report and environmental assessment from the conservation survey are included in the appendix for further reference. This project is intended to draw attention to the urgent need for better preservation practices for the World War I portrait collection.


Author(s):  
Y. V. Borovsky

The article deals with privatization in Russia’s energy sector with a special focus on a recent purchase of the private TNK-BP by the state-owned Rosneft. The author analyses the past, present and future privatization deals related to the Russian oil, gas and power generation industry as compared to accumulated international experience. For instance, the article displays the ways the Norwegian, Brazilian, French and British authorities privatized national strategic energy assets. The study presented in the article also aims to find out key advantages and disadvantages of state or private ownership in the Russian and global energy industry. For example, it sheds light on some considerable achievements of the Russian state-controlled companies in oil production amid a widespread belief that more than a decade-long growth in the Russian oil industry is due only to private firms that were created in the 1990s. Additionally, the state-controlled Norwegian oil and gas firm Statoil that shows strong operational and financial results on the Norwegian Continental Shelf and abroad is also in the spotlight of the current study. In line with the mentioned takeover of TNK-BP the author examines outcomes of the reorganization of RAO UES of Russia (the dismantled Russian electric power monopoly) that was seen as a massive privatization of the national power industry. Moreover, the study presents two groups of interests prevailing in the Russian government and energy business to give an outlook on the Russian energy industry.


Author(s):  
Jadranka Stojanovski

>> See video of presentation (28 min.) The primary goal of scholarly communication is improving human knowledge and sharing is the key to achieve this goal: sharing ideas, sharing methodologies, sharing of results, sharing data, information and knowledge. Although the concept of sharing applies to all phases of scholarly communication, most often the only visible part is the final publication, with the journal article as a most common type. The traditional characteristics of the present journals allow only limited possibilities for sharing the knowledge. Basic functions, registration, dissemination, certification, and storage, are still present but they are no more effective in the network environment. Registration is too slow, there are various barriers to dissemination, certification system has many shortcomings, and used formats are not suitable for the long term preservation and storage. Although the journals today are digital and various powerful technologies are available, they are still focused on their unaltered printed versions. This presentation will discuss possible evolution of journal article to become more compliant with users' needs and to enable “the four R’s of openness” – reuse, redistribute, revise and remix (Hilton, Wiley, Stein, & Johnson, 2010).Several aspects of openness will be presented and discussed: open access, open data, open peer review, open authorship, and open formats. With digital technology which has become indispensable in the creation, collection, processing and storage of data in all scientific disciplines the way of conducting scientific research has changed and the concept of "data-driven science" has been introduced (Ware & Mabe, 2009). Sharing research data enhances the capabilities of reproducing the results, reuse maximizes the value of research, accelerating the advancement of science, ensuring transparency of scientific research, reducing the possibility of bias in the interpretation of results and increasing the credibility of published scientific knowledge. The open peer review can ensure full transparency of the entire process of assessment and help to solve many problems in the present scholarly publishing. Through the process of the open peer review each manuscript can be immediately accessible, reviewers can publicly demonstrate their expertise and could be rewarded, and readers can be encouraged to make comments and views and to become active part of the scholarly communication process. The trend to to describe the author's contribution is also present, which will certainly lead to a reduced number of “ghost”, "guest" and "honorary" authors, and will help to establish better standards for author’s identification.Various web technologies can be used also for the semantic enhancement of the article. One of the most important aspects of semantic publication is the inclusion of the research data, to make them available to the user as an active data that can be manipulated. It is possible to integrate data from external sources, or to merge the data from different resources (data fusion) (Shotton, 2012), so the reader can gain further understanding of the presented data. Additional options provide merging data from different articles, with the addition of the component of time. Other semantic enhancement can include enriched bibliography, interactive graphical presentations, hyperlinks to external resources, tagged text, etc.Instead of mostly static content, journals can offer readers dynamic content that includes multimedia, "living mathematics", “executable articles”, etc. Videos highlighting critical points in the research process, 3D representations of chemical compounds or art works, audio clips with the author's reflections and interviews, and animated simulations or models of ocean currents, tides, temperature and salinity structure, can became soon common part of every research article. The diversity of content and media, operating systems (GNU / Linux, Apple Mac OSX, Microsoft Windows), and software tools that are available to researchers, suggests the usage of the appropriate open formats. Different formats have their advantages and disadvantages and it would be necessary to make multiple formats available, some of which are suitable for "human" reading (including printing on paper), and some for machine reading that can be used by computers without human intervention. Characteristics and possibilities of several formats will be discussed, including XML as the most recommended format, which can enable granulate document structure as well as deliver semantics to the human reader or to the computer.Literature:Hilton, J. I., Wiley, D., Stein, J., & Johnson, A. (2010). The Four R’s of Openness and ALMS Analysis: Frameworks for Open Educational Resources. Open Learning: The Journal of Open, Distance and E-Learning, 25(1), 37–44. doi:10.1080/02680510903482132Shotton, D. (2012). The Five Stars of Online Journal Articles - a Framework for Article Evaluation. D-Lib Magazine, 18(1/2), 1–16. doi:10.1045/january2012-shottonWare, M., & Mabe, M. (2009). The stm report (p. 68).


Author(s):  
Е.П. ВИКТОРОВА ◽  
А.Д. АЧМИЗ ◽  
М.В. ЛУКЬЯНЕНКО ◽  
С.О. СЕМЕНИХИН

При производстве качественной пищевой продукции особое внимание необходимо уделять ее упаковыванию и хранению. Витаминно-минеральные концентраты, используемые для приготовления пищевых продуктов и получения качественной безопасной продукции животноводства, содержат комплекс лабильных биологически активных веществ, для сохранности которых необходимо минимизировать окислительные процессы. Это обусловливает повышенные требования к упаковке таких продуктов. С целью выбора упаковочного материала и способа упаковки витаминно-минерального концентрата проведен тематический обзор публикаций отечественных и зарубежных ученых. Рассмотрены тенденции в области применения упаковочных материалов, указаны преимущества и недостатки биополимеров. На основе проведенного анализа установлено, что для упаковывания витаминно-минерального концентрата целесообразно в качестве материала упаковки использовать полимерные пленки, обладающие высокой свето- и газонепроницаемостью, позволяющей снизить скорость протекания окислительных процессов и, следовательно, сократить потери содержащихся в продукте лабильных биологически активных веществ. В качестве способа упаковки можно рекомендовать применять вакуумирование, обеспечивающее отсутствие кислорода воздуха в упаковке. When producing high-quality food products, special attention should be paid to their packaging and storage. Vitamin and mineral concentrates used for food preparation and production of high-quality safe livestock products contain a complex of labile biologically active substances, for the safety of which it is necessary to minimize oxidative processes. This leads to increased requirements for the packaging of such products. In order to select the material and method of packaging of vitamin and mineral concentrates, a thematic review of publications of domestic and foreign scientists was conducted. Trends in the use of packaging materials are considered, advantages and disadvantages of biopolymers are indicated. It was found that for packaging vitamin and mineral concentrate, polymer pellicle with high light and gas tightness, which allows reducing the rate of oxidative processes and, consequently, reducing the loss of labile biologically active substances contained in the product, should be used as a packaging material. Vacuuming, which ensures the absence of oxygen in the air in the package, can be recommended as a method of packaging.


Sign in / Sign up

Export Citation Format

Share Document