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- SAT solving - An alternative to brute force bitcoin mining
- Crypto… mania
- Bitcoin: What is it?
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- बिटकॉइन क्या होता है?
- Bitcoin Price (BTC INR)
- Bitcoin price Prediction using Tensor flow (Python) integrated with MATLAB
- Bitcoin Stock Prediction Using Artificial Neural Networks
- Value-at-risk and related measures for the Bitcoin
SAT solving - An alternative to brute force bitcoin mining
Proof of Existence as a blockchain service has first been published in as a public notary service on the Bitcoin network and can be used to verify the existence of a particular file in a specific point of time without sharing the file or its content itself.
This service is also available on the Ethereum based bloxberg network, a decentralized research infrastructure that is governed, operated and developed by an international consortium of research facilities. Since it is desirable to integrate the creation of this proof tightly into the research workflow, namely the acquisition and processing of research data, we show a simple to integrate MATLAB extension based solution with the concept being applicable to other programming languages and environments as well.
Researchers predicate their work on the earlier findings of their topics and investigate the remained questions to go further. However, for progress, they have to cope not only with their experimental design and methodology but also the replicability of earlier findings. The replicability crisis has been highlighted in the last decade by affecting the vital research areas like social sciences, natural sciences and medicine Pashler and Wagenmakers, The survey that was conducted with over 1, scientists revealed that almost three-quarters of them failed to reproduce another scientist's experiment and curiously enough, half of them even collapsed to reproduce their own experiments Baker, There are several reasons behind this crisis, but the first and foremost is the pressure on the researchers' shoulders to publish in a credible journal.
This pressure causes p -value hacking by applying many statistical tests on the data and reporting only the significant and mostly positive results which do not represent the real findings. The logical way to overcome these obstacles is to be more open about the published research by sharing the detailed explanation of the experimental design, methodology and analyzed data, as well as the unretouched raw data.
Miyakawa has reported that after asking several authors to provide raw data as an editor in chief of a journal, most of the manuscripts were withdrawn or the raw data was not sufficient enough to be published as of its written. All these deceptions induce a waste of time and resources for the scientists who are willing to investigate more about their research interest and demonstrate both positive and negative results. Now we are at a point in time in which people are aware of the issues mentioned above and instead of only discussing this on media, researchers should shoulder responsibility and take a step to encounter the replicability crisis by being transparent on raw data sharing.
In this context, the blockchain and distributed ledger technology DLT might be an enabling factor to allow for a better digitalization and automation, leading to an improvement in integrity and transparency of research data and the research process as a whole.
A Bitcoin-based implementation of a Proof-of-Existence PoE service for generic digital documents has already been released as early as and uses the approach of storing a cryptographic document hash on the public ledger. It, therefore, acts as a public notary service for proving the existence of a document at a certain point in time without disclosing the content of the document itself Kirk, ; Swan, A similar approach has been proposed for a secure and tamper-proof storage of clinical trial data, hinting at the potential for improving the general quality of clinical research with regards to traceability, prevention of a posteriori reconstruction of data and secure automation Benchoufi and Ravaud, In addition, blockchain and DLT based solutions have been suggested for solving problems in the intellectual property and copyright domain, for example, for a secure timestamped manuscript submission and peer review system Gipp et al.
Based on these findings and the demands of the scientific community, we have developed a software library for the integration of the industry-standard MATLAB computing environment with the scientific blockchain infrastructure bloxberg, which allows for seamless inclusion of raw research data existence certification into existing scientific processes.
The bloxberg infrastructure is a secure global blockchain governed and secured by an international consortium of scientific organizations. The infrastructure's goal is to provide scientists with services based on blockchain as well as fostering collaboration between the scientific community Kleinfercher et al. In comparison to other prominent blockchain networks, such as Bitcoin and the public Ethereum network Mainnet which utilize Proof-of-Work PoW Nakamoto, ; Wood, , the bloxberg blockchain uses a Proof-of-Authority PoA consensus engine with Authority Round Aura as the used consensus algorithm Kleinfercher et al.
This algorithm minimizes the energy consumption of securing a blockchain and increases the potential throughput while maintaining decentralization by distributing block confirmations between the participating scientific organizations Parity, However, since Aura relies on UNIX time synchronization of authority nodes, situations might occur, where different sets of authorities have a different current leader, leading to concurrent forks of the chain, which are resolved eventually over time Angelis et al.
As a consequence, this means bloxberg has no-consistency or eventual-consistency guarantees, making it an AP availability, partition tolerance system in the context of the CAP-theorem. Furthermore, since the validating nodes in the network are known entities, specific computational and network requirements can be met by participating nodes.
This property ensures a higher degree of scalability and efficiency compared to PoW-based blockchains, while at the same time implementing the concept of a based distributed trust architecture in the form of a consortium of international research organizations. These properties make the bloxberg network an ideal infrastructure to build scientifically-focused blockchain applications on. One of those already existing applications is the Certify DApp.
The Certify DApp is a production-ready decentralized application deployed on the bloxberg network. It can be used to verify the existence of an arbitrary file i. This use case is implemented by recording the SHA hash, which is considered a strong cryptographic hash function by the German Federal Office for Information Security BSI, , together with additional metadata as a transaction in the bloxberg network see Figure 1. The transaction creation timestamp acts as a public record, proving the existence of the certified data at this point in time.
It is, therefore, possible to later verify the prior certification of a file by looking up the timestamp of the first transaction containing its SHA hash in the bloxberg network.
In addition to being usable as a real DApp in conjunction with a wallet software e. This access is implemented utilizing a web application, including a REST-API, which interacts as a proxy, or intermediary agent, toward the bloxberg network. Additionally, further accessibility and user experience improving clients and integrations are possible, such as Max Planck Digital Library's single-button integration into their existing internal cloud storage solution KEEPER MPG, Our system design tries to strike a compromise between accessibility with scientists in general as the intended user group and leveraging the capabilities of a distributed trust architecture, while at the same time being easily integratable into existing scientific processes.
This of course means, that this design accepts the Certify DApp web service as a trusted component for this process. While this increases the accessibility and lowers the entry bar, it, at the same time, introduces a single point of failure into the system and works against the data autonomy. Future implementations might expand on this problem. The provided API allows the certification of any file from within the program flow see Listing 1.
It is, therefore, possible to certify final as well as intermediary results alike. However, note that the hash-based approach of certification lends itself better to certifying persistent artifacts in order to allow for the creation of the relation between the certified hash and the actual research data.
The current implementation does not make use of any decentralized public-key cryptography infrastructure and therefore does not provide strong guarantees with regards to the origin of the certified research data. A substantial improvement would be the integration of key management in the form of wallet software. This component would allow cutting out the Certify DApp web service as a middle-man and would, therefore, lead to a real DApp implementation. Also, the current approach allows solely for the certification of single pieces of research data as an atomic unit.
A much more significant potential lies in the possibility of certifying the scientific process as a whole over its complete lifetime.
This concept might include entities, such as experimental designs and methodologies, experimental setups, used hardware ideally in the form of cyber-physical systems , source code and used software, experiment subjects e.
Current efforts of the bloxberg community in the form of bloxberg Improvement Proposals BLIPs already try to tackle this challenge of certifying a multi-dimensional scientific process Bloxberg, The datasets presented in this study can be found in online repositories.
NW contributed the introduction and proposed a general scientific outlook on the topic. Software implementation was contributed by DK. NP provided the overall supervision. KW contributed the conception, design, and software architecture as well as the overall writing of this document.
All authors contributed to the manuscript revision, read, and approved the submitted version. The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. We would like to thank all members and institutions of the bloxberg community for their ongoing support and dedication.
Angelis, S. Google Scholar. Baker, M. News Benchoufi, M. Blockchain technology for improving clinical research quality. Trials BSI Ethereum Ethereum Improvement Proposals. Gipp, B. Kirk, J. Kleinfercher, F. Miyakawa, T. No raw data, no science: another possible source of the reproducibility crisis.
Brain MPG First International Blockchain for Science: bloxberg. PubMed Abstract. Nakamoto, S. Parity Parity Documentation—Aura—Authority Round. Pashler, H. Editors' introduction to the special section on replicability in psychological science: a crisis of confidence? Reinhold, M. Swan, M. Blockchain: Blueprint for a New Economy, 1st Edn.
OCLC: ocn Wood, G. Blockchain The use, distribution or reproduction in other forums is permitted, provided the original author s and the copyright owner s are credited and that the original publication in this journal is cited, in accordance with accepted academic practice.
No use, distribution or reproduction is permitted which does not comply with these terms. Introduction Researchers predicate their work on the earlier findings of their topics and investigate the remained questions to go further.
Figure 1. Research data certification process in bloxberg Certify DApp. Figure 2. Components, relations, and protocols. Listing 1. Example API usage.
This website hosts the data sets and code used in the exercises of our text. Griffin, D. Scripts with and without Automated Relevance Determination are provided. Matlab code is available for this paper Discussion of "Nonparametric Bayesian Inference in Applications": Bayesian nonparametric methods in econometrics with M. Hierarchical Bayesian models for regularisation in sequential learning. Trained ClassificationNaiveBayes classifiers store the training data, parameter values, data distribution, and prior probabilities.
Bitcoin: What is it?
A large variety of value-at-risk measures and backtesting criteria are implemented. Bitcoin is a highly volatile currency violating the value-at-risk measures more than the other assets. With respect to the Basel Committee on Banking Supervision Accords, a Bitcoin investor is subjected to higher capital requirements and capital allocation ratio. The risk of an investor holding Bitcoins is measured and quantified via the regulatory framework practices. Stavroyiannis, S. Report bugs here. Please share your general feedback. You can join in the discussion by joining the community or logging in here. You can also find out more about Emerald Engage. Visit emeraldpublishing.
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Clustering is the process of grouping a set of data given a certain criterion. In this way it is possible to define subgroups of data, cal Search This Blog. Volatility forecasting is a common but still very important problem in finance, especially in risk management and quantitative finance.
Bitcoin is a digital currency that was created in January , and it's one of the first and most well-known forms of crytpocurrency: virtual money secured by cryptography. It's built on a technology called the Blockchain, and for several years, the two concepts were almost synonymous. Strangely, although Bitcoin is the most well-known cryptocurrency, its creator is still unknown. Someone with the pseudonym Satoshi Nakamoto released a whitepaper that would become Bitcoin. Bitcoin initially grew in part because it promised freedom from government-issued centralised authorities. Over the years though, it has developed into an asset class that many serious investors also have in their portfolios, and not just people who are following its digital ideals.
बिटकॉइन क्या होता है?
Trying to find Fpga Pore available on sale? Are you looking for Bitcoin Mining Rig or comparable products? Fpga rig. Suitable for risers with 40 mm distance between assembly screws. More than 27 million people use GitHub to discover, fork, and contribute to over 80 million projects. Below are statistics about the Bitcoin Mining performance of ASIC hardware and only includes specialized equipment that has been shipped.
Bitcoin Price (BTC INR)
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Bitcoin price Prediction using Tensor flow (Python) integrated with MATLAB
Price prediction right now from historical data is going to be very tricky, because no historical bitcoin data set will match current market behaviour. Consider HODLing. We break the first third of the data into all possible consective intervals of sizes s, s and s. It then uses the second set of prices to calculate the corresponding weights of features found using the bayesian regression method explained in the paper.
Bitcoin Stock Prediction Using Artificial Neural Networks
The task is to find a nonce which, as part of the bitcoin block header , hashes below a certain value. This is a brute force approach to something-like-a preimage attack on SHA The process of mining consists of finding an input to a cryptographic hash function which hashes below or equal to a fixed target value. It is brute force because at every iteration the content to be hashed is slightly changed in the hope to find a valid hash; there's no smart choice in the nonce. The choice is essentially random as this is the best you can do on such hash functions. In this article I propose an alternative mining algorithm which does not perform a brute force search but instead attacks this problem using a number of tools used in the program verification domain to find bugs or prove properties of programs, see as example . Namely, a model checker backed by a SAT solver are used to find the correct nonce or prove the absence of a valid nonce.
Value-at-risk and related measures for the Bitcoin
File Exchange. Updated 03 Apr BTC-e changed their api url, this caused the script to stop working. This update will solve the issue.