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24 pages, 1050 KB  
Article
Zoning Regimes, Official Land Values, and Housing Price Formation
by Ya-Wen Wu, Wei-Hsi Hung and Chen-Yi Sun
Buildings 2026, 16(6), 1171; https://doi.org/10.3390/buildings16061171 - 16 Mar 2026
Abstract
This study examines how zoning regimes mediate the capitalization of officially assessed land values into housing prices in a high-density metropolitan housing market. Using transaction-level housing data from New Taipei City, Taiwan, we estimate a hedonic pricing model combined with a boundary-based spatial [...] Read more.
This study examines how zoning regimes mediate the capitalization of officially assessed land values into housing prices in a high-density metropolitan housing market. Using transaction-level housing data from New Taipei City, Taiwan, we estimate a hedonic pricing model combined with a boundary-based spatial comparison that restricts observations to properties located near zoning borders. The results indicate that official land values are significantly associated with housing prices but are only partially capitalized, with an estimated elasticity of approximately β ≈ 0.37 in the baseline specification. Interaction models further reveal that capitalization elasticities vary systematically across zoning regimes, suggesting that planning regulations influence how administratively determined land values are translated into market prices. These heterogeneous capitalization patterns remain stable across alternative boundary bandwidths and model specifications. The findings highlight the institutional role of zoning systems in shaping the relationship between administratively assessed land values and housing market outcomes. More broadly, the study contributes to the literature on housing market regulation by demonstrating how land-use institutions mediate price formation processes in densely developed urban environments. Full article
(This article belongs to the Section Architectural Design, Urban Science, and Real Estate)
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30 pages, 6670 KB  
Article
Application of Quercus pubescens Acorn Flour and Xanthan Gum in Gluten-Free Cookies: RSM Optimization and Quality Evaluation
by Jasmina Lukinac, Dragana Medaković, Daliborka Koceva Komlenić, Ana Šušak and Marko Jukić
Foods 2026, 15(5), 966; https://doi.org/10.3390/foods15050966 - 9 Mar 2026
Viewed by 221
Abstract
Despite the growing demand for functional gluten-free (GF) foods, the application of Quercus pubescens acorn flour remains largely underexplored. This study addresses this gap by optimizing GF cookies using response surface methodology (RSM) and prepared with Q. pubescens acorn flour and xanthan gum [...] Read more.
Despite the growing demand for functional gluten-free (GF) foods, the application of Quercus pubescens acorn flour remains largely underexplored. This study addresses this gap by optimizing GF cookies using response surface methodology (RSM) and prepared with Q. pubescens acorn flour and xanthan gum to balance technological quality, sensory acceptability, and functional value. A three-level full factorial design (FFD) evaluated the effects of acorn flour proportion (0, 50 and 100%), and xanthan gum level (1, 2 and 3%) on physicochemical properties (moisture, water activity, color, texture, and dimensions), sensory attributes using a 9-point hedonic scale, proximate composition, and bioactive and antioxidant properties (total polyphenols, tannins, DPPH, ABTS, FRAP). Linear and quadratic polynomial models adequately described the experimental data (R2 = 0.86–0.99; non-significant lack of fit). Increasing acorn flour content significantly intensified cookie darkening, reduced snapping force and bending stiffness, reduced spread factor, and affected sensory perception, while xanthan gum improved structural integrity and dimensional stability. Multi-response optimization identified an optimal formulation containing 41.05% acorn flour and 1.46% xanthan gum, achieving balanced color development (darkness index ≈ 62), bending stiffness (~38 N/mm), and high overall sensory acceptability (~7.8). The optimized GF cookies exhibited a favorable nutritional profile and antioxidant properties, characterized by elevated total polyphenol content and antioxidant capacity, confirming the functional potential of acorn flour. The optimized cookies (containing 41.05% acorn flour) exhibited a six-fold increase in total phenolic content (from 1.63 to 10.08 mg GAE/g) and 8–10 times higher antioxidant capacity (DPPH, ABTS, and FRAP assays) compared to the control, confirming the substantial functional potential of Q. pubescens in gluten-free systems. Full article
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25 pages, 3131 KB  
Article
How the Sociality of AI Digital Human Advisors Shapes User Experience Value in Digital Finance: The Mediating Role of Social Presence
by Yishu Tang and Hosung Son
J. Theor. Appl. Electron. Commer. Res. 2026, 21(3), 79; https://doi.org/10.3390/jtaer21030079 - 2 Mar 2026
Viewed by 303
Abstract
Emerging digital technologies are increasingly embedded in consumer-facing financial services, reshaping how users experience, evaluate, and engage with AI-mediated interactions. This paper investigates how the perceived sociality of AI Digital Human Advisors influences user experience in digital financial services. Sociality—defined as the extent [...] Read more.
Emerging digital technologies are increasingly embedded in consumer-facing financial services, reshaping how users experience, evaluate, and engage with AI-mediated interactions. This paper investigates how the perceived sociality of AI Digital Human Advisors influences user experience in digital financial services. Sociality—defined as the extent to which users perceive an AI Digital Human Advisor as a socially capable actor (e.g., responsive, relational, and role-embedded) rather than a purely functional tool—was experimentally manipulated across four controlled behavioral experiments simulating interactions on financial platforms. The results from four controlled experimental simulations consistently demonstrate that, under controlled interaction conditions, high-sociality AI advisors significantly enhance both utilitarian and hedonic value. Social presence was found to partially mediate these effects, revealing the psychological mechanism through which social cues embedded in emerging AI technologies are transformed into experiential value. Furthermore, two boundary conditions were identified: communication style and usage context. Communication framed around task completion amplified the influence of sociality on utilitarian value, whereas interaction styles emphasizing social connection strengthened its effect on hedonic value. Likewise, purchase-related scenarios heightened functional perceptions, while browsing situations elicited stronger emotional responses. By situating AI Digital Human Advisors within the broader context of emerging digital technologies, these findings extend Social Response Theory into AI-mediated financial environments and provide insights into how technologically enabled social cues shape consumer experience and behavior in digital finance. Full article
(This article belongs to the Special Issue Emerging Digital Technologies and Consumer Behavior)
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18 pages, 445 KB  
Article
Modelling Real-Estate Values Around Railway Stations: Insights from an Italian Case
by Francesco Guglielmi, Tannaz Tabrizi, Francesco De Fabiis and Pierluigi Coppola
Sustainability 2026, 18(5), 2304; https://doi.org/10.3390/su18052304 - 27 Feb 2026
Viewed by 271
Abstract
This study investigates the Wider Economic Impacts (WEIs) of railway infrastructure in Italy by analysing how station characteristics and surrounding urban contexts are capitalized into residential property values. A nationwide cross-sectional dataset covering 985 railway stations is used to estimate a Hedonic Price [...] Read more.
This study investigates the Wider Economic Impacts (WEIs) of railway infrastructure in Italy by analysing how station characteristics and surrounding urban contexts are capitalized into residential property values. A nationwide cross-sectional dataset covering 985 railway stations is used to estimate a Hedonic Price Model (HPM) combining observed variables and latent constructs derived from Confirmatory Factor Analysis (CFA). Results show that railway centrality, long-distance service provision, and multimodal integration are positively associated with housing prices. In particular, shared mobility services generate significant value uplift effects, especially around Local and Local Plus stations. Conversely, car-oriented accessibility is negatively associated with residential values, reflecting the capitalization of traffic-related externalities. Socioeconomic and tourism-related characteristics further contribute to heterogeneous capitalization patterns across the national territory. The findings provide systemic empirical evidence to support investment prioritization, multimodal integration, and value uplift of station areas within the Italian railway network. Full article
(This article belongs to the Section Sustainable Transportation)
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20 pages, 489 KB  
Article
The Interrelationship Between Land Values, Woodland Planting, and Farm Characteristics
by Neil Dunse and Colin Jones
Land 2026, 15(2), 309; https://doi.org/10.3390/land15020309 - 12 Feb 2026
Viewed by 352
Abstract
There are well-documented environmental benefits of the impact of tree planting but limited research on the implications for agricultural land values. Although trees provide significant public and economic benefits, farmers’ perceptions of their value are crucial in determining their willingness to adopt tree [...] Read more.
There are well-documented environmental benefits of the impact of tree planting but limited research on the implications for agricultural land values. Although trees provide significant public and economic benefits, farmers’ perceptions of their value are crucial in determining their willingness to adopt tree planting initiatives. This paper focuses on the application of hedonic price modelling (HPM) to assess the impact of trees on agricultural land values, controlling for other factors including types of farms, soil quality, location, and local population density. The paper begins by reviewing existing agricultural HPM studies noting key factors affecting land prices, with a particular focus on trees. This review justifies the framework for our subsequent empirical HPM analysis of English farmland with three hypotheses to be tested. By examining the relationship between land prices and various agricultural attributes including location, farm infrastructure, land parcel size, soil quality, farm type, and existing woodland cover—this analysis quantifies how tree planting influences agricultural land valuation. The results suggest that the existence of woodland on a farm does not significantly influence land prices that are primarily influenced by other farm characteristics. However, larger woodland areas, above approximately 80 acres, show a modest positive impact on land values, implying a non-linear relationship. Policymakers aiming to promote afforestation must therefore recognize these value relationships between traditional agricultural land use and woodland expansion. Full article
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25 pages, 947 KB  
Review
Real Estate Trends and 15-Min Cities: A Scoping Review and Spatial–Economic Framework
by Nikolaos Karanikolas and Eleni Kyriakidou
Urban Sci. 2026, 10(2), 108; https://doi.org/10.3390/urbansci10020108 - 10 Feb 2026
Viewed by 1455
Abstract
The 15-min city (15 MC) is an urban planning concept that organizes cities through proximity-based systems, enabling residents to access essential services within a 15-min walk or cycle. Although the health and environmental benefits of this model are well documented, its effects on [...] Read more.
The 15-min city (15 MC) is an urban planning concept that organizes cities through proximity-based systems, enabling residents to access essential services within a 15-min walk or cycle. Although the health and environmental benefits of this model are well documented, its effects on the real estate market have received limited attention. This paper examines the impact of 15-min proximity-based urban planning models on land use patterns, property values, and sociospatial interactions in urban settings. It adopts a scoping review approach (structured mapping and synthesis of the available literature) and, using a transparent source selection process (PRISMA-ScR), compiles evidence on how functional accessibility, mixed uses, and proximity to green/public spaces affect prices and rents in residential and/or commercial real estate. The synthesis shows that proximity is often capitalized as a proximity premium, but it can exacerbate inequalities and displacement risks without accompanying regulatory mechanisms. Based on the findings, an operational spatial–economic framework is proposed that links (a) planning interventions, (b) functional accessibility, (c) behavioral adaptation, (d) market valuation reactions, and (e) governance/redistribution tools (e.g., land value capture, inclusionary zoning), as a diagnostic tool for assessing surplus value and displacement risk and as a basis for future GIS/hedonic testing. Full article
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30 pages, 611 KB  
Article
How Does Digital Experience of Cultural Heritage Transform into Sustained Behavioral Intention? Assessing Perceived Value and Place Attachment Mechanisms Based on Value Adoption Model
by Lingsen Meng and Zong-Yi Zhu
Sustainability 2026, 18(3), 1470; https://doi.org/10.3390/su18031470 - 2 Feb 2026
Viewed by 487
Abstract
The rapid development and deep integration of digital technology into cultural heritage have created new experiential paradigms for tourists. However, to transform from technological application to behavioral retention, the internal mechanisms through which digital experiences are internalized into stable, sustained behavioral intentions must [...] Read more.
The rapid development and deep integration of digital technology into cultural heritage have created new experiential paradigms for tourists. However, to transform from technological application to behavioral retention, the internal mechanisms through which digital experiences are internalized into stable, sustained behavioral intentions must be elucidated. The influence of perceived value on tourists’ long-term behavioral intentions via place attachment remains largely unexplored. Using the value adoption model (VAM), this study constructs a sequential mediation model of “digital experience–perceived value–place attachment–sustained behavioral intentions” and employs structural equation modeling to examine cross-sectional survey responses from 618 tourists visiting Shandong Museum, China. Findings reveal that the functional dimensions of interactive experience and perceived ease of use significantly enhance perceived value, whereas the sensory dimensions of immersive and hedonic experiences have no significant impact on perceived value—possibly because tourists in cultural heritage contexts prioritize knowledge acquisition over sensory stimulation. Perceived value significantly and positively predicts place attachment and sustained behavioral intentions, and place attachment strongly predicts sustained behavioral intentions (including word-of-mouth recommendation, revisit intention, and sharing). This study extends the VAM to offline cultural heritage digital experience contexts, demonstrates that functional utility is more critical than sensory stimulation in driving value perception, and validates the value attachment–behavior transformation pathway, providing theoretical foundations and practical implications for cultural heritage digitalization management. Full article
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17 pages, 1060 KB  
Article
Influence of Live Music and Tasting Assessment on Hedonic and Emotional Responses of Wine in Public Tasting Events
by Roberto Marangoni, Isabella Taglieri, Alessandro Bianchi, Chiara Sanmartin, Pierina Díaz-Guerrero, Alessandro Tonacci, Francesco Sansone and Francesca Venturi
Foods 2026, 15(3), 504; https://doi.org/10.3390/foods15030504 - 1 Feb 2026
Viewed by 375
Abstract
Wine represents one of the most complex food matrices from a sensory perspective, as its appreciation emerges from the interaction between chemical composition, perceptual mechanisms, and contextual influences. Contemporary research in oenology and sensory science increasingly recognizes wine evaluation as an integrated perceptual [...] Read more.
Wine represents one of the most complex food matrices from a sensory perspective, as its appreciation emerges from the interaction between chemical composition, perceptual mechanisms, and contextual influences. Contemporary research in oenology and sensory science increasingly recognizes wine evaluation as an integrated perceptual event shaped by cognition, memory, and affect, rather than a simple response to aroma or flavor cues. Live music is widely used in hospitality settings to enhance consumer experience; however, its specific influence on wine appreciation and emotional responses remains insufficiently explored, particularly in real-world contexts. This study investigates how two contrasting musical atmospheres—melancholic/relaxing and upbeat/motivational—modulate hedonic evaluations and emotional profiles during public wine tastings, compared with a no-music condition. Data were collected across five live tasting events (5 Wednesdays of Emotions) using structured questionnaires that included hedonic ratings and multidimensional emotional measures. Statistical analyses were conducted using non-parametric tests, meta-analytic p-value combination, and cumulative link mixed models for ordinal data. The presence of music significantly enhanced overall wine appreciation compared to the silent condition, although the magnitude and direction of the effect varied across individuals and musical styles. Upbeat/motivational music generally produced stronger and more consistent increases in liking than melancholic/relaxing music. Emotional responses—particularly positive surprise—emerged as key mediators of hedonic improvement and showed strong associations with overall liking. Preference profiling revealed distinct response patterns, indicating that auditory modulation of wine perception is not uniform across consumers. These findings support a crossmodal interpretation in which music shapes wine appreciation primarily through emotion-based and expectancy-related mechanisms rather than through direct sensory enhancement. By demonstrating these effects in ecologically valid tasting environments, the study highlights the role of auditory context as a meaningful component of multisensory wine experiences. Full article
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16 pages, 1813 KB  
Article
The Impact of Adding Sunflower Seed Oil Bodies to a Sugar-Free Plant-Based Ice Cream Formulation
by Flavius George Viorel, Cristian Szekely, Andruța Elena Mureșan, Andreea Pușcaș and Vlad Mureșan
Foods 2026, 15(3), 472; https://doi.org/10.3390/foods15030472 - 29 Jan 2026
Viewed by 721
Abstract
The increasing demand for plant-based alternatives, driven by veganism, lactose intolerance, and greater health consciousness, has intensified research into dairy-free frozen desserts. This study investigates the development of a plant-based ice cream alternative utilizing oleosomes extracted from sunflower seed kernels as natural emulsifiers, [...] Read more.
The increasing demand for plant-based alternatives, driven by veganism, lactose intolerance, and greater health consciousness, has intensified research into dairy-free frozen desserts. This study investigates the development of a plant-based ice cream alternative utilizing oleosomes extracted from sunflower seed kernels as natural emulsifiers, eliminating the need for synthetic additives. Oleosomes were obtained through aqueous extraction from raw kernels, incorporated into emulsions in three levels (0, 12, and 24%), and combined with sunflower seed oil, tahini, date paste, and water to create the ice cream (IC) formulations. The physicochemical properties of three formulations of a sugar-free frozen dessert were studied. Physicochemical analyses assessed nutritional value, color (CIELab), melting time, stability, overrun, viscosity, and texture profile (TPA). Sensory evaluation was conducted using a hedonic test to assess the impact of tahini type (sunflower seed tahini or pumpkin seed kernel tahini) on the product acceptance. Results showed that higher oleosome content improved emulsion stability and melting resistance, while also producing a softer (30.74 ± 0.28 N), less adhesive (1.87 ± 0.20 mJ) texture, suitable for plant-based ice cream. Sensory analysis revealed a clear preference for the pumpkin tahini formulation, which scored 8.21 ± 0.62 for overall appreciation. The findings demonstrate that the addition of oleosome might improve textural attributes of the products, while the consumer preference could also be influenced by the type of tahini involved in the formulation. However, further studies are necessary to corroborate the proposed interaction mechanisms of ingredients. Full article
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27 pages, 790 KB  
Article
Quality of School and Housing Prices: A Study for the Apartment Market in Porto Alegre, Brazil
by Luiz Andrés Ribeiro Paixão and Carolina Barbosa Seidel da Costa
Real Estate 2026, 3(1), 1; https://doi.org/10.3390/realestate3010001 - 27 Jan 2026
Viewed by 540
Abstract
We use the hedonic price model to measure the effect of school quality on apartment rent prices in Porto Alegre, Brazil. A spatial autoregressive regression (SAR) was employed due to the spatial nature of the data. We estimated the effect of school quality [...] Read more.
We use the hedonic price model to measure the effect of school quality on apartment rent prices in Porto Alegre, Brazil. A spatial autoregressive regression (SAR) was employed due to the spatial nature of the data. We estimated the effect of school quality on apartment prices for public and private schools separately. The results shed light on the relation between school quality and apartment prices in a Global South context. We showed that both public and private school quality is valued in Porto Alegre house markets, although the effect is quite different for each type of school. For public schools, the major effect comes from the distance of the nearest schools. An increase in test scores by one standard deviation raises apartment rent prices by 2.7% for the whole city. However, this effect is bigger for some submarkets, reaching 11.6% for the distant suburbs. For private schools, the same effect occurs but for a larger distance radius. The same increase in average test score out to a 2 km distance from private schools raised the apartment price by 1.0%. Nevertheless, this effect reaches 6.6% in one specific submarket. Full article
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25 pages, 3825 KB  
Review
Balancing Personalization, Privacy, and Value: A Systematic Literature Review of AI-Enabled Customer Experience Management
by Ristianawati Dwi Utami and Wang Aimin
Information 2026, 17(2), 115; https://doi.org/10.3390/info17020115 - 26 Jan 2026
Viewed by 1457
Abstract
Artificial intelligence (AI) is transforming customer experience management (CXM) by enabling real-time, data-driven, and personalized interactions across digital touchpoints, including chatbots, voice assistants, generative AI, and immersive platforms. This study presents a PRISMA-based systematic literature review of 59 peer-reviewed studies published between 2021 [...] Read more.
Artificial intelligence (AI) is transforming customer experience management (CXM) by enabling real-time, data-driven, and personalized interactions across digital touchpoints, including chatbots, voice assistants, generative AI, and immersive platforms. This study presents a PRISMA-based systematic literature review of 59 peer-reviewed studies published between 2021 and 2026, examining how AI-enabled personalization, privacy concerns, and customer value interact within AI-mediated customer experiences. Drawing on the Personalization–Privacy–Value (PPV) framework, the review synthesizes evidence on how AI-driven personalization enhances utilitarian, hedonic, experiential, relational, and emotional value, thereby strengthening satisfaction, engagement, loyalty, and behavioral intentions. At the same time, the findings reveal persistent tensions, as privacy concerns, perceived surveillance, algorithmic bias, and contextual moderators—including generational differences, cultural expectations, and technological literacy—frequently constrain value creation and erode trust. The review highlights that personalization benefits are highly contingent on transparency, perceived control, and ethical alignment, rather than personalization intensity alone. The study contributes by integrating ethical AI considerations into CXM research and clarifying conditions under which AI-enabled personalization leads to value creation versus value destruction. Managerially, the findings underscore the importance of ethical governance, transparent data practices, and customer-centered AI design to sustain trust and long-term customer relationships. Future research should prioritize longitudinal analyses of trust development, demographic heterogeneity, and cross-sector comparisons of AI governance as AI technologies become increasingly embedded in service ecosystems. Full article
(This article belongs to the Section Artificial Intelligence)
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23 pages, 2254 KB  
Article
Total Substitution of Egg White by Faba Bean Protein Concentrate in Marshmallow Formulation
by Ameni Dhieb, Abir Mokni Ghribi, Haifa Sebii, Zina Khaled, Romdhane Karoui, Christophe Blecker, Hamadi Attia and Souhail Besbes
Foods 2026, 15(2), 382; https://doi.org/10.3390/foods15020382 - 21 Jan 2026
Viewed by 464
Abstract
This paper discusses the total replacement of egg white (EW) with faba bean protein concentrate (FPC) in a marshmallow formulation. The physico-chemical and techno-functional characterizations of the ingredients revealed that FPC, with a protein content of 68%, exhibited an interesting foaming capacity (200%) [...] Read more.
This paper discusses the total replacement of egg white (EW) with faba bean protein concentrate (FPC) in a marshmallow formulation. The physico-chemical and techno-functional characterizations of the ingredients revealed that FPC, with a protein content of 68%, exhibited an interesting foaming capacity (200%) compared to EW, which had comparable foaming stability. The physico-chemical properties of the final products indicated that the FPC marshmallow (FPCM) had a higher density (0.519 g/mL), lower moisture (17.337%), and a water activity within the recommended range for this type of product. The FPCM had the highest hardness and elasticity values but the lowest cohesiveness and adhesiveness. Scanning electron microscopy showed that the FPCM structure is similar to that of the EW marshmallow (EWM). In front-face fluorescence spectroscopy measurements, the FPCM exhibited higher emission intensity for tryptophan with a maximum at 382 nm and vitamin A with a maximum located around 338 nm. FTIR analysis presented higher peaks at 850, 918, and 1034 cm−1 for the EWM compared to the FPCM. In a hedonic evaluation, the majority of descriptors (hardness, odor, and general acceptability) showed similar scores for both formulations. All results demonstrated the success of the total substitution of egg white by FPC in the marshmallow formulation. Full article
(This article belongs to the Section Food Engineering and Technology)
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27 pages, 1042 KB  
Article
Inclusion Matters: An Academic Call for Considering Inclusivity in Motivation-Based Research on Running Events, the Case of the Half-Marathon of Elche, Spain
by José E. Ramos-Ruiz, José M. Cerezo-López, Paula C. Ferreira-Gomes and David Algaba-Navarro
Tour. Hosp. 2026, 7(1), 17; https://doi.org/10.3390/tourhosp7010017 - 8 Jan 2026
Viewed by 681
Abstract
Participation in running events has expanded worldwide, consolidating itself as a form of active leisure and a driver of social and tourism engagement. Although runners’ motivations have been extensively studied, perceived inclusivity, understood as motivation derived from the event’s promotion of equitable participation [...] Read more.
Participation in running events has expanded worldwide, consolidating itself as a form of active leisure and a driver of social and tourism engagement. Although runners’ motivations have been extensively studied, perceived inclusivity, understood as motivation derived from the event’s promotion of equitable participation across gender, age and functional ability, has rarely been examined as a distinct motivational dimension within structural models. This study analyses the motivational structure of participants in the Elche Half Marathon (Spain) and assesses the incremental contribution of inclusivity to traditional motivational frameworks. Based on a sample of 1053 valid responses, a two-stage psychometric and segmentation approach was applied. Exploratory and confirmatory factor analyses (EFA and CFA) were conducted to compare a four-factor model (sport-related hedonism, competition, socialization and digital socialization) with an extended five-factor model incorporating inclusivity. Subsequently, cluster analyses were performed using factor scores derived from each model. The results show that the inclusion of inclusivity improves model fit and increases explained variance, while also generating a more differentiated segmentation structure. The extended model revealed six motivational profiles, some of which displayed continuity with the classical solution, while others were reconfigured when inclusivity was introduced. Overall, the findings indicate that inclusivity functions as a complementary and context-dependent motivational dimension that refines the understanding of participation heterogeneity in running events. Rather than replacing traditional motives, inclusivity contributes incremental explanatory value and enhances the identification of motivational profiles, offering relevant insights for the design and management of mass-participation sporting events. Full article
(This article belongs to the Special Issue Tourism Event and Management)
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23 pages, 2953 KB  
Article
Green Valorization of Parapenaeus longirostris By-Products Through Ultrasound-Assisted Extraction of Astaxanthin with Extra Virgin Olive Oil: Application in Functional Trahanas with Enhanced Stability and Consumer Acceptability
by Ioannis Panagiotakopoulos, Haralabos C. Karantonis, Ioannis Geraris Kartelias and Constantina Nasopoulou
Sustainability 2026, 18(1), 272; https://doi.org/10.3390/su18010272 - 26 Dec 2025
Viewed by 479
Abstract
Astaxanthin, a potent antioxidant, has attracted growing interest for its applications in the food, pharmaceutical, and cosmetic industries. This study aims to optimize the green extraction of astaxanthin from shrimp (Parapenaeus longirostris) by-products using ultrasound-assisted extraction (UAE) with extra virgin olive [...] Read more.
Astaxanthin, a potent antioxidant, has attracted growing interest for its applications in the food, pharmaceutical, and cosmetic industries. This study aims to optimize the green extraction of astaxanthin from shrimp (Parapenaeus longirostris) by-products using ultrasound-assisted extraction (UAE) with extra virgin olive oil (EVOO) as a sustainable solvent, and explore its application in trahana fortification, a traditional Greek fermented cereal-based product. Response Surface Methodology (RSM) was applied to optimize astaxanthin extraction conditions (extraction time, liquid-to-solid (L/S) ratio, and ultrasound amplitude). Fatty acid analysis was performed with gas chromatography (GC-FID), and sensory analysis was conducted using a 7-point hedonic scale for sensory attributes. The optimal UAE conditions for astaxanthin, determined by RSM, were 228 min extraction time, a 65:1 liquid-to-solid ratio, and 41% ultrasound amplitude, predicting 83.50 μg astaxanthin/g by-product. At the optimal conditions, the experimentally obtained yield of 76.75 ± 1.17 μg astaxanthin/g by-product fell within the 95% confidence interval of the predicted value. The enriched trahanas retained nutritionally relevant levels after cooking (46.35 ± 0.60 μg astaxanthin per 60 g serving). Accelerated storage testing at 65 °C for six days was used to assess the thermal stability of astaxanthin in enriched trahanas. Based on first-order degradation kinetics and Arrhenius-based extrapolation of literature-derived activation energy values, astaxanthin retention above 80% at 25 °C was estimated to be maintained for approximately 27–51 days. Thereafter, progressive degradation is expected, with the estimated half-life ranging from 85 to 159 days. GC-FID analysis revealed favorable incorporation of bioactive lipids, including omega-3 fatty acids (EPA and DHA). Sensory evaluation demonstrated enhanced consumer acceptability, with enriched samples scoring significantly higher in appearance, aroma, and overall acceptance compared to traditional trahanas. These findings highlight UAE as an efficient and environmentally friendly strategy for recovering astaxanthin from seafood by-products and for developing functional cereal-based foods that align with sustainability. This work demonstrates the effective use of extra virgin olive oil as a green extraction solvent that also serves as a nutritional carrier, enabling the enrichment of trahanas with astaxanthin. The approach ensures both nutritional stability and consumer acceptability, providing a practical pathway for the development of sustainable, functional cereal-based foods. Full article
(This article belongs to the Section Sustainable Food)
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21 pages, 763 KB  
Article
Cross-Cultural Adaptation and Psychometric Properties of the Reward-Based Eating Drive Scale (RED-13) and Its Brief Version (RED-5X) in Three European Countries
by Rui Poínhos, Joanna Kowalkowska, Nicolò Sala, Tainá Lopes da Silva, Marta Plichta, Ana Lucas, Camilla Folzi, Iolanda Cioffi, Ana Maria Pandolfo Feoli, Marisa Porrini, Janete de Souza Urbanetto, Simona Bertoli and Bruno M. P. M. Oliveira
Nutrients 2026, 18(1), 49; https://doi.org/10.3390/nu18010049 - 23 Dec 2025
Viewed by 656
Abstract
Background and aims: Reward-based eating reflects hedonic drivers of intake, including loss of control, diminished satiety, and preoccupation with food. We translated, adapted and studied the psychometric properties of the 13- and 5-item Reward-Based Eating Drive Scale (RED), for Portugal, Poland and Italy. [...] Read more.
Background and aims: Reward-based eating reflects hedonic drivers of intake, including loss of control, diminished satiety, and preoccupation with food. We translated, adapted and studied the psychometric properties of the 13- and 5-item Reward-Based Eating Drive Scale (RED), for Portugal, Poland and Italy. Methods: A cross-cultural study was conducted with higher education students and general population samples (n = 1999). After translation and cultural adaptation, the RED was administered with food craving items, and collection of sociodemographic and anthropometric data. Factorial structure and measurement invariance were tested using confirmatory factor analysis (CFA), internal consistency with Cronbach’s alpha, and convergent validity via correlations with BMI and cravings. Results: CFA supported the expected structures of the RED-13 (three factors) and RED-X5 (unifactorial), with configural and metric invariance across countries and groups. Only partial scalar invariance was achieved for both versions. The RED-13 showed good to excellent internal consistency for total scores (0.868 ≤ α ≤ 0.906), with acceptable to good reliability for Loss of control (0.769 ≤ α ≤ 0.821), lower values for Lack of satiety (0.655 ≤ α ≤ 0.723), and good to excellent consistency for Preoccupation with food (0.881 ≤ α ≤ 0.918). The RED-X5 showed acceptable internal consistency (0.737 ≤ α ≤ 0.811) and correlated strongly with RED-13 (r = 0.949, p < 0.001). Both correlated positively with BMI and food cravings. Age, sex, and country had small to medium multivariate effects on RED scores. Conclusions: The RED-13 and RED-X5 showed good psychometric properties in Portugal, Poland, and Italy, with the RED-13 providing a multifactorial assessment and the RED-X5 offering a brief alternative. Full article
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