Sapientia
Repositório Científico da UAlg
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Spheritivity, a hybrid immersive VR Art collection
Publication . Olivero, Lucas Fabian
Spheritivity is a collection of handmade immersive art exploring the influence of hybrid (physical/digital) perspective artworks for boosting artists’ creativity. Spheritivity exposes applications of Hybrid Immersive Art and the wide range of possibilities that perspective (as knowledge) can offer to artists, from the mastering of geometries in space up to the creation of digital environments using the latest advancements in the field of graphic representation: spherical perspectives. Furthermore, Spheritivity is enhanced with visual paradoxes (intellectual component) and Spheri (interactive component). The visual paradoxes are Escher-like visual games, such as never-ending stairs, non-orientable surfaces, etc., which Spheritivity upgrade to a never-ending canvas (via digital technology) and considering all vanishing points around the observer (via spherical perspectives). In turn, the installation Spheri uses body tracking via the machine learning library MediaPipe, and it provides Spheritivity with an interactive framework for visitors and artists to discover the potential and applications of VR environments created from spherical perspectives.
Synergizing data storytelling and AI enhancing: Engagement in complex data communication
Publication . Frade, Maria João; Ramos, Celia
Combining Data Storytelling concepts and Artificial Intelligence algorithms presents a powerful alliance for the analysis and communication of complex data, in a more intuitive environment and with higher levels of engagement. The main goal was to understand and present the potential of combining these two areas, where sentiment analysis was the method considered to represent Artificial Intelligence. The considered methodology consists, in a first phase of literary review, followed by sentiment analysis. The findings of this research culminate in the development of the definition of Data Storytelling, its potential, and its relationship with Artificial Intelligence systems, presenting a Dashboard Data Storytelling incorporated with AI.
First record of the diatom pathogen Diatomophthora perforans cf. subsp. 2 pleurosigmae (Oomycota) from the Mediterranean microphytobenthos
Publication . Scholz, Bettina; Grammatiki, Kleopatra; Avramidi, Eleni; Lymperaki, Myrsini; Resaikos, Vasilis; Papatheodoulou, Magdalene; Küpper, Frithjof C.
Knowledge about pathogens of diatoms and macroalgae in the Mediterranean is scarce. This paper reports the first record of the oomycete Diatomophthora perforans subsp. pleurosigmae infecting the Mediterranean microphytobenthic diatom Pleurosigma cf. intermedium, which was detected in the context of marine environmental surveys of the brine outfalls of two seawater desalination plants.
Selective use of distant stone resources by the earliest Oldowan toolmakers
Publication . Finestone, Emma M.; Plummer, Thomas W.; Ditchfield, Peter W.; Reeves, Jonathan S.; Braun, David R.; Bartilol, Simion K.; Rotich, Nelson Kiprono; Bishop, Laura C.; Oliver, James S.; Kinyanjui, Rahab N.; Petraglia, Michael D.; Breeze, Paul S.; Lemorini, Cristina; Caricola, Isabella; Obondo, Paul Owich; Potts, Richard
The adaptive shift that favored stone tool–assisted behavior in hominins began by 3.3 million years ago. However, evidence from early archaeological sites indicates relatively short-distance stone transport dynamics similar to behaviors observed in nonhuman primates. Here we report selective raw material transport over longer distances than expected at least 2.6 million years ago. Hominins at Nyayanga, Kenya, manufactured Oldowan tools primarily from diverse nonlocal stones, pushing back the date for expanded raw material transport by over half a million years. Nonlocal cobbles were transported up to 13 kilometers for on-site reduction, resulting in assemblage patterns inconsistent with accumulations formed by repeated short-distance transport events. These findings demonstrate that early toolmakers moved stones over substantial distances, possibly in anticipation of food processing needs, representing the earliest archaeologically visible signal for the incorporation of lithic technology into landscape-scale foraging repertoires.
Reconstruction of phylogeographic relationships and evolution of the tundra vole, Alexandromys oeconomus (Rodentia, Cricetidae), based on ancient DNA
Publication . Żeromska, Aleksandra; Baca, Mateusz; Lemanik, Anna; Popović, Danijela; Krajcarz, Magdalena; Stojak, Joanna; Stefaniak, Krzysztof; Fewlass, Helen; Fadeeva, Tatyana; Horáček, Ivan; Agadzhanyan, Alexander K.; Serdyuk, Natalia V.; Rhodes, Sara; Conard, Nicolas; Desclaux, Emmanuel; Royer, Aurélien; Pavlova, Svetlana V.; Baláž, Ivan; Rekovets, Leonid; Berto, Claudio; Horvath, Gyozo; Nadachowski, Adam; Mackiewicz, Paweł
The Late Pleistocene and Holocene climatic fluctuations profoundly influenced the demographic patterns of many species. Small mammals, particularly rodents, are well-suited for such studies due to their abundance and high environmental sensitivity. A suitable subject is the tundra vole, Alexandromys oeconomus, with changing past and present distributions across the Holarctic. Using ancient DNA, we reconstructed its phylogeography and identified 12 main lineages, including extinct lineages, which highlight greater historical variability of this species. Our analyses revealed eastward and westward expansions, extinctions, and lineage replacements driven by climate changes. Originating in Central/Western Asia, the tundra vole expanded around 110 ka (thousand years ago) into Europe, diversifying into multiple lineages. Two migrations from Central Asia to north-eastern Asia occurred at roughly 70 and 16 ka, and preceded the colonization of North America by 11.5 ka. Europe also experienced intense population turnovers, with remigrations into Western Asia. Fennoscandia was colonized three times after 15 ka by two distinct routes. These migrations were tied to climate changes, with population size increasing during warming periods and declining during cooling periods, especially during the Last Glacial Maximum. This research provides new findings on how climate and environmental shifts shaped the evolution and distribution of A. oeconomus, highlighting the resilience and adaptability of small mammals.