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The following results are related to Digital Humanities and Cultural Heritage. Are you interested to view more results? Visit OpenAIRE - Explore.
235 Research products, page 1 of 24

  • Digital Humanities and Cultural Heritage
  • 2013-2022
  • English
  • SSRN Electronic Journal
  • Neliti

10
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  • Open Access English
    Authors: 
    Limeros, Sandra Carrasco; Majchrowska, Sylwia; Johnander, Joakim; Petersson, Christoffer; Sotelo, Miguel Ángel; Llorca, David Fernández;

    Predicting the motion of other road agents enables autonomous vehicles to perform safe and efficient path planning. This task is very complex, as the behaviour of road agents depends on many factors and the number of possible future trajectories can be considerable (multi-modal). Most approaches proposed to address multi-modal motion prediction are based on complex machine learning systems that have limited interpretability. Moreover, the metrics used in current benchmarks do not evaluate all aspects of the problem, such as the diversity and admissibility of the output. In this work, we aim to advance towards the design of trustworthy motion prediction systems, based on some of the requirements for the design of Trustworthy Artificial Intelligence. We focus on evaluation criteria, robustness, and interpretability of outputs. First, we comprehensively analyse the evaluation metrics, identify the main gaps of current benchmarks, and propose a new holistic evaluation framework. In addition, we formulate a method for the assessment of spatial and temporal robustness by simulating noise in the perception system. We propose an intent prediction layer that can be attached to multi-modal motion prediction models to enhance the interpretability of the outputs and generate more balanced results in the proposed evaluation framework. Finally, the interpretability of the outputs is assessed by means of a survey that explores different elements in the visualization of the multi-modal trajectories and intentions. 16 pages, 7 figures, 6 tables

  • Publication . Preprint . Article . 2022
    Open Access English
    Authors: 
    Yi-Chun Chen; Gaoji Hu; Xiangqian Yang;

    A principal who values an object allocates it to one or more agents. Agents learn private information (signals) from an information designer about the allocation payoff to the principal. Monetary transfer is not available but the principal can costly verify agents' private signals. The information designer can influence the agents' signal distributions, based upon which the principal maximizes the allocation surplus. An agent's utility is simply the probability of obtaining the good. With a single agent, we characterize (i) the agent-optimal information, (ii) the principal-worst information, and (iii) the principal-optimal information. Even though the objectives of the principal and the agent are not directly comparable, we find that any agent-optimal information is principal-worst. Moreover, there exists a robust mechanism that achieves the principal's payoff under (ii), which is therefore an optimal robust mechanism. Many of our results extend to the multiple-agent case; if not, we provide counterexamples.

  • Publication . Article . Preprint . 2022
    Open Access English
    Authors: 
    Crisostomo, Ricardo;

    We develop a comprehensive framework to measure the impact of the climate transition on investment portfolios. Our analysis is enriched by including geographical, sectoral, company and ISIN-level data to assess transition risk. We find that investment funds suffer a moderate 5.7% loss upon materialization of a high transition risk scenario. However, the risk distribution is significantly left-skewed, with the worst 1% funds experiencing an average loss of 21.3%. In terms of asset classes, equities are the worst performers (-12.7%), followed by corporate bonds (-5.6%) and government bonds (-4.8%). We discriminate among financial instruments by considering the carbon footprint of specific counterparties and the credit rating, duration, convexity and volatility of individual exposures. We find that sustainable funds are less exposed to transition risk and perform better than the overall fund sector in the low-carbon transition, validating their choice as green investments. 25 pages, 6 figures, 11 tables

  • Publication . Article . Preprint . 2022
    Open Access English
    Authors: 
    Kapengut, Elie; Mizrach, Bruce;

    On September 15, 2022, the Ethereum network adopted a proof-of-stake (PoS) consensus mechanism. We study the impact on the network and competing platforms in a short event window around the Beacon chain merge. We find that the transition to PoS has reduced energy consumption by 99.98%. Miners have not transformed into validators, and total block reward income has fallen by 95.6%. The validator network's Herfindahl index is 1,159, 8.6% lower than the miners' prior to the merge. Ethereum supply growth has fallen nearly 95%. Transaction fees for Ether have nearly doubled and token transaction fees have increased 23.7%. The time between consecutive blocks is now steady at 12 seconds, a speed increase of 18.9%. Fewer transactions are being included in each block though, so the transactions per second have actually fallen by 58.2%. On Polygon, Matic fees rose 21.7% and token fees 31.7%. Polygon also slows, processing 12.7% fewer transactions per second. Solana's fees and speed are unaffected by the merge. Stablecoin transfer volumes rise on all three networks. Polygon has the largest gain for USD Coin, 230%, and the Mainnet the largest for Tether, 86%.

  • English
    Authors: 
    Legein, Christophe; Body, Monique; Lhoste, Jérôme; Li, Wei; Charpentier, Thibault; Dambournet, Damien;
    Publisher: HAL CCSD
    Country: France

    International audience; CaTiF 6 (H 2 O) 2 was synthetized by a solvothermal method and was found to be isostructural to SrTiF 6 2H 2 O. The structure, refined from Powder X-Ray Diffraction (PXRD) data, is built from the connectivity of dimers [Ca 2 F 10 (H 2 O) 4 ] of square antiprisms (SAP) [CaF 5 (H 2 O) 3 ] and TiF 6 octahedra. To assign the six 19 F resonances to the six fluorine crystallographic sites of same multiplicity, 19 F magnetic shielding tensors have been calculated using the GIPAW method. Unusually, the plot of the experimental 19 F isotropic chemical shift (δ iso) values, as a function of the calculated 19 F isotropic shielding ( iso) values, shows a much better alignment for the experimental than for the DFT-optimized structure. Whereas, the dynamics of the structural water molecules under experimental conditions are not captured by the optimized structure, the experimental averaged structure provides a good account of the experimental data and a reliable assignment of the 19 F resonances to the F sites. Finally, the previously established bond-valence (BV) parameter R ij for the Ti 4+ /Fion pair (1.76 Å) leads to overestimated BV sum values for Ti. This trend has been observed for almost all other fluorotitanates. We then undertook to refine its value, using the Ti-F bond lengths from 70 carefully selected structures containing 134 Ti sites forming TiF 6 octahedra, and leading to R ij. = 1.706 Å.

  • Open Access English
    Authors: 
    Matthew Rimmer;
    Publisher: Multidisciplinary Digital Publishing Institute

    Refereed article - Matthew Rimmer. "The Internet Archive and the National Emergency Library: Copyright Law and COVID-19" (2022) 11 (5) Laws Article No. 79. Abstract: In the tradition of legal writing about landmark intellectual property cases, this paper provides an in-depth case study and analysis of an important copyright conflict during the COVID-19 crisis. The Internet Archive established the National Emergency Library to provide for access to knowledge for those who were unable to access their usual libraries, schools, and educational institutions. In response, four large publishers have brought a copyright lawsuit against the Internet Archive, alleging both direct copyright infringement, as well as secondary copyright infringement. The Author’s Guild has supported this action. Fearful of litigation, the Internet Archive has decided to close the National Emergency Library earlier than it anticipated. The litigation raises a range of issues in respect of copyright infringement, the defence of fair use, library exceptions, digital lending, and intermediary liability. The conflict also raises questions about the operation of the first sale doctrine in the digital era. There are also divided views as to what, if any, remedies are appropriate in the case over the Internet Archive and the National Emergency Library. It is argued that there needs to better mechanisms under copyright law to enable access to knowledge in a public health crisis – such as the coronavirus outbreak. This case study makes a significant contribution to our understanding of the relationship between authors, publishers, and libraries in the digital age. It also provides an insight into copyright litigation – in particular, the role of amicus curiae submissions, and the nature and scope of copyright exceptions. This paper also raises larger considerations about the intersection of copyright law with larger concerns about access to knowledge, competition policy, and public health emergencies.

  • Open Access English
    Authors: 
    Moshe Eliasof; Nir Ben Zikri; Eran Treister;

    Unsupervised image segmentation is an important task in many real-world scenarios where labelled data is of scarce availability. In this paper we propose a novel approach that harnesses recent advances in unsupervised learning using a combination of Mutual Information Maximization (MIM), Neural Superpixel Segmentation and Graph Neural Networks (GNNs) in an end-to-end manner, an approach that has not been explored yet. We take advantage of the compact representation of superpixels and combine it with GNNs in order to learn strong and semantically meaningful representations of images. Specifically, we show that our GNN based approach allows to model interactions between distant pixels in the image and serves as a strong prior to existing CNNs for an improved accuracy. Our experiments reveal both the qualitative and quantitative advantages of our approach compared to current state-of-the-art methods over four popular datasets.

  • Open Access English
    Authors: 
    Eugene Larsen-Hallock; Adam Rej; David Thesmar;

    We empirically analyze a large sample of firm sales growth expectations. We find that the relationship between forecast errors and lagged revision is non-linear. Forecasters underreact to typical (positive or negative) news about future sales, but overreact to very significant news. To account for this non-linearity, we propose a simple framework, where (1) sales growth dynamics have a fat-tailed high frequency component and (2) forecasters use a simple linear rule. This framework qualitatively fits several additional features of data on sales growth dynamics, forecast errors, and stock returns.

  • Open Access English
    Authors: 
    Joël F. Tsoplefack; Faustino Palmero; Jesús Cuevas-Maraver; Astero Provata; Dimitrios J. Frantzeskakis;

    We study systematically the scattering of solitons on localized impurities in the discrete nonlinear Schr\"odinger (DNLS) equation with a saturable nonlinearity. We show that, apart from the generic scenario of the outcome of the scattering process, namely the emergence of a reflected and a transmitted soliton, other effects can occur. In particular, it is found that, in the case of an attractive impurity, a soliton trapped at the impurity can coexist with the reflected and transmitted ones. This effect, which resembles the behaviour of a quantum particle interacting with a narrow impurity, has not previously reported for discrete setting. Parameter regimes are explored for determining soliton splitting on the impurity with special attention to equal soliton splitting.

  • Publication . Research . Other literature type . Article . 2022
    Open Access English
    Authors: 
    Sparavigna, Amelia Carolina;
    Publisher: Zenodo

    Newspapers and websites are reporting with strong emphasys the successes of quantum computing, obtained by the new quantum machines. It is therefore natural to ask ourselves some questions about these machines, in particular how do they operate, where are they physically and what is needed for their running. Actually, we must ask ourselves such questions because the news headlines – sometime bombastic - could lead us to understand quantum machines as actually existing supercomputers, able of solving in a few seconds some calculation problems that classical computers would take millennia to process. To answer questions, this work is proposing a review of existing Quantum Computers. In the panorama of Quantum Computing, we intend to investigate how the future of their infrastructures will be, such as the related basic algorithms. We will try to understand what their logistics will be, where logistics is understood as a new quantum "art of computing". Specific attention will be paid to the quantum advantage, the medium-term strategy related to design algorithms for the next generations of quantum computers. Such algorithms are required by a wide range of strategic applications. Currently, they are mainly simulation algorithms of quantum physics and chemistry, but also algorithms related to quadratic unconstrained binary optimization exist. Here we will illustrate in particular two methods: one based on abiabatic quantum computation, which is obtained through quantum annealing (D-Wave systems), the other based on arrays of quantum gates (IBM, Google and others). We will see, in greater detail, the simulations concerning the Variational Quantum Eigensolver method. Some notions related to qubits, quantum gates and their Hamiltonians will be proposed too. Besides talking of qubits, we will also report about qumodes. In fact, the art of quantum computing has two faces, one based on qubits, the other based on qumodes. Xanadu's Borealis quantum computer is an example of qumode computer. It is capable of developing a hybrid system, with GKP-type qubit emulation along with squeezed light. SpinQ's first three qubits desktop will also be mentioned. A hint of quantum communication will also be provided.