Recent and Most-Cited Papers by Andreas Neocleous
Radiocarbon, 2019
Information about the global climate, the carbon cycle, changes in solar activity, and a number o... more Information about the global climate, the carbon cycle, changes in solar activity, and a number of other atmospheric processes are preserved in the carbon-14 and the beryllium-10 records. However, these isotope datasets are large and cumbersome to work with. We have designed a self-contained, easy-to-use application that allows for more efficient analysis of different periods and patterns of interest. For several applications in atmospheric modelling, a pre-processing stage is applied to the isotope datasets in order to interpolate the data and mitigate their low temporal resolution. In CHRONOscope, we included linear and non-linear methods of interpolation with interactive parameter optimization. The resultant interpolated data can be extracted for further use. The main functionalities of CHRONOscope include the importation and superimposition of external data, quick navigation through the data with the use of markers, expression of the carbon-14 results in both ∆ 14 C and yr BP form, separation of the data by source, and the visualization of associated error bars. We make this free software available in standalone applications for both Windows and Macintosh operating systems.
Papers by Andreas Neocleous
IEEE Access, 2022
In this work, we use machine learning techniques to address a research question regarding the aut... more In this work, we use machine learning techniques to address a research question regarding the authorship of two famous essays in the nineteenth century. On Liberty (1859) and The Subjection of Women (1869) were published under John Stuart Mill's name, a widely studied nineteenth-century British philosopher. Mill himself attributed them to collaboration with his wife and partner, Harriet Taylor Mill. More than 150 years later, the question remains whether the author of these two canonical texts in the history of political thought was solely John Stuart Mill. Experts are divided on taking John Stuart Mill's attribution at face value, since Harriet Taylor Mill had died in 1858. Addressing this question, we use a dataset consisted in essays of both authors, to train three state-of-the-art classifiers that are able to learn and distinguish the writing style of each author. Then, we use the models built to attribute the two famous essays of disputed authorship to one of the two. From the results, we conclude that the classifiers are able to learn the two classes very well, and they return high accuracies on the validation set. Regarding the test set, most of the models attribute the two essays to John Stuart Mill, however, the contribution of Harriet Taylor Mill is shown for some chunks of text of both essays. These results, we conclude, explain why experts are divided on this particular research question.
Extreme bursts of radiation from space result in rapid increases in the concentration of radio-ca... more Extreme bursts of radiation from space result in rapid increases in the concentration of radio-carbon in the atmosphere. Such rises, known as Miyake Events, can be detected through the measurement of radiocarbon in dendrochronological archives. The identification of Miyake Events is important because radiation impacts of this magnitude pose an existential threat to satellite communications and aeronautical avionics and may even be detrimental to human health. However, at present, radiocarbon measurements on tree-ring archives are generally only available at decadal resolution, which smooths out the effect of a possible radiation burst. The Miyake Events discovered so far, in tree-rings from the years 3372-3371 BCE, 774-775 CE, and 993-994 CE, have essentially been found by chance, but there may be more. In this paper, we use signal processing techniques, in particular COSFIRE, to train filters with data on annual changes in radiocarbon (14 C) around those dates. Then, we evaluate th...
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Recent and Most-Cited Papers by Andreas Neocleous
Papers by Andreas Neocleous