Browsing by Issue Date, starting with "2025-01-01"
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- Large language models powered aspect-based sentiment analysis for enhanced customer insightsPublication . Água, Mariana; António, Nuno; Carrasco, Paulo; RASSAL, CARIMOIn the age of social networks, user-generated content has become vital for organizations in tourism and hospitality. Traditional sentiment analysis methods often struggle to process large volumes of data and capture implicit sentiments. This study examines the potential of Aspect-Based Sentiment Analysis (ABSA) using Large Language Models (LLMs) to enhance sentiment analysis. By employing GPT-4o via ChatGPT, we benchmark three approaches: a fuzzy logic-based method, manual human analysis, and a new ChatGPT-based analysis. We analyze a dataset of 500 all-inclusive hotel reviews, comparing these methods to assess ChatGPT's effectiveness in identifying nuanced language and handling subjectivity. The findings reveal a high similarity between ChatGPT and human analysis, showcasing ChatGPT's ability to interpret complex sentiments and automate sentiment classification tasks. This study highlights the potential of LLMs in transforming customer feedback analysis, providing deeper insights, and improving responsiveness in the hospitality industry. These results contribute to academia by presenting a framework for using LLMs in ABSA and guiding future applications and development.
- Effects of hypoxia on the olfactory sensitivity of gilt-head seabream (Sparus aurata)Publication . Tigert, Liam R.; Hubbard, Peter; Porteus, Cosima S.Coastal environments around the world are becoming increasingly hypoxic owing to anthropogenic effects. We hypothesized that, because the olfactory epithelium is in contact with the external environment, decreased external oxygen will impair olfaction. We performed electro-olfactograms on juvenile gilt-head seabream (Sparus aurata) and measured the response to three amino acids at five different concentrations (1×10−7 to 1×10−3 mol l−1) in normoxic (20 kPa O2) and two hypoxic conditions (12.5 and 5.7 kPa O2). For the first time, we show that both mild and moderate hypoxia decreased the olfactory response to two out of three odorants. As more coastal areas become hypoxic, it is important to understand how hypoxia may impair the sensory systems of fishes, which can have individual- and population-level effects and important implications for our food supply.
- Studies on cortisol, corticosterone, and 17b-estradiol indicate these steroids have no role in stress or reproduction in the common octopus (Octopus vulgaris)Publication . Maskrey, Benjamin H.; Costas, Carolina; Méndez-Martínez, Luís; Guerrero-Peña, Laura; Tur, Ricardo; García, Pablo; Touriñan, Pablo; Chavarrias, David; Canario, Adelino; Scott, Alex P.; Rotllant, JosepThe common octopus (Octopus vulgaris) is a promising candidate for aquaculture diversification, particularly in Europe. As interest in octopus farming grows, animal welfare concerns arise. In bony vertebrates (teleosts and tetrapods), measurements of the levels of corticosterone or cortisol have been successfully used as indicators of stress and welfare. Here, it is explored whether octopuses also produce cortisol or corticosterone and, if so, whether they are released into the water in response to stress (as can be done in teleosts and amphibians). The ability of the octopus to absorb cortisol from the water is also investigated-with another steroid, the principle vertebrate estrogen, 17 beta-estradiol (E-2), being used as a positive uptake control. In this study, using liquid chromatography tandem mass spectrometry techniques, it was found that octopus hemolymph did not contain either cortisol, corticosterone, cortisone (a common metabolite of cortisol), or E-2. Nor were any of the corticosteroids consistently found in the water in which stressed octopuses were held. The results support the evolutionary argument that octopuses are unlikely to exhibit a stress response mediated by vertebrate-like corticosteroids. Octopus demonstrated a low ability to absorb cortisol from the water (<2% over 24 h) but showed a high ability to absorb E-2 from water (92% over 24 h). In this latter respect, the octopus is similar to other mollusks. The finding calls into doubt the origin of the E-2 measured in this species. NEW & NOTEWORTHY This study demonstrates that common octopuses (Octopus vulgaris Cuvier 1797) do not produce cortisol, cortisone, or corticosterone in response to stress. Using liquid chromatography tandem mass spectrometry, it was also shown that octopuses have a low absorption rate of cortisol from water but a high absorption rate of 17 beta-estradiol (E2). The findings support the evolutionary argument that octopuses are unlikely to exhibit a stress response mediated by vertebrate-like