Search results

This paper aims to develop a model to predict online review ratings from multiple sources, which can be used to detect fraudulent reviews and create proprietary rating indexes, or which can be used as a measure of selection in recommender systems.

This study applies machine learning and natural language processing approaches to combine features derived from the qualitative component of a review with the corresponding quantitative component and, therefore, generate a richer review rating.

Experiments were performed over a collection of hotel online reviews – written in English, Spanish and Portuguese – which shows a significant improvement over the previously reported results, and it not only demonstrates the scientific value of the approach but also strengthens the value of review prediction applications in the business environment.

This study shows the importance of building predictive models for revenue management and the application of the index generated by the model. It also demonstrates that, although difficult and challenging, it is possible to achieve valuable results in the application of text analysis across multiple languages.

This study aims to evaluate two bacterial cellulose (BC) films as an alternative textile surface suitable for use in the manufacture of clothing prototypes.

A combination of experiments for the production and characterization of BC films with traditional techniques for sewing fabrics was carried out. BC films were produced from the bacterum Gluconacetobacter hansenii UCP1619 and from Kombucha, a consortium of microorganisms grown on sugared tea. The BC films were then purified, characterized by scanning electron microscopy (SEM) and evaluated for mechanical strength. Two clothing prototypes were developed by combining BC films with a flat fabric composed of 70% linen and 30% polyester to assess the viability of the garment for future clothing making using biomaterials.

The results showed that the combination of flat fabric with BC-based biomaterials is a viable alternative for the innovative use of BC films in the manufacture of apparel products, especially after optimizing the mechanical properties of the artefact.

BC application studies in the textile industry are still in their early stages, although they are attracting more and more the attention of researchers around the world. The experiments carried out in this research provide new information on the handling and application of this material in innovative products for the textile industry.

The purpose of this research is to identify the combinations of factors leading to experience in sustainability reporting by Spanish public universities.

Using a sample of 49 public universities in Spain, this paper identifies the combinations of factors on innovation profile, political and internal factors that explain the different degree of corporate social reporting experience with fuzzy-set qualitative comparative analysis.

The study’s findings are a contribution to existing literature as the results obtained point out three different configurations leading to this expertise, with a combination of different conditions based on innovation profile, political and internal factors. Also, the results reveal new characteristics of sustainable development strategies by universities, such as devoting a specific sustainability reporting section in the university website, creating a sustainability body in the university structure or submitting the sustainability report to external assurance.

This study refers only to Spanish public universities. In the future, new studies can enlarge the sample and analyse country effects and impact of public versus private status of universities on sustainability reporting strategies.

The study’s findings are important for university community, regulators and other stakeholders to start considering the need to somehow promote further sustainability reporting and assurance practices by universities, especially in a context of budget restrictions.

This paper opens up a new line of research on sustainability experience using an innovative methodology (fuzzy-set qualitative comparative analysis) useful with small sample sizes, and provides a complete picture of sustainability reporting by Spanish public universities.

Consumption of game meat is growing when compared to other meats. It is susceptible to adulteration because of its cost and availability. Spectroscopy may lead to rapid methodologies for detecting adulteration. The purpose of this study is to detect the adulteration of wild fallow deer (Dama dama) meat with domestic goat (G) (Capra aegagrus hircus) meat, for samples stored for different periods of time using Fourier transform infrared (FTIR) spectroscopy coupled with chemometric.

Meat was cut and mixed in different percentages, transformed into mini-burgers and stored at 3°C from 12 to 432 h and periodically examined for FTIR, pH and microbial analysis. Principal component analysis (PCA) and partial least squares discriminant analysis (PLS-DA) were applied to detect adulteration.

The PCA model, applied to the spectral region from 1,138 to 1,180, 1,314 to 1,477, 1,535 to 1,556 and from 1,728 to 1,759 cm⁻¹, describes the adulteration using four principal components which explained 95 per cent of variance. For the levels of Adulteration A1 (pure meat), A2 (25 and 50 %w/wG) and A3 (75 and 100 %w/wG) for an external set of samples, the correlation coefficients for prediction were 0.979, 0.941 and 0.971, and the room mean square error were 8.58, 12.46 and 9.47 per cent, respectively.

The PLS-DA model predicted the adulteration for an external set of samples with high accuracy. The proposed method has the advantage of allowing rapid results, despite the storage time of the adulterated meat. It was shown that FTIR combined with chemometrics can be used to establish a methodology for the identification of adulteration of game meat, not only for fresh meat but also for meat stored for different periods of time.

This paper aims to characterize the type of support provided to victims of violence against women and domestic violence (VAWDV) during the first lockdown, assessing the training of professionals to use remote support (RS).

This cross-sectional study involves a sample of 196 support professionals, mainly women (91.8%) and who integrate the Portuguese National Support Network for victims of domestic violence (NSNVDV) (Mean age = 36.49; SD = 10.52).

Telephone emerges as the main RS communication media used in the lockdown (43.9%) and the emergency state periods (57.1%). Participants reported to have never used any social applications (41.8% vs 41.8%) or videoconference (46.4% vs 58.2%), in both periods assessed, i.e. lockdown and emergency state, respectively, and 82.7% assumed to have no training with RS to assist VAWDV victims. However, support professionals recognized several advantages in using RS such as dealing with isolation, reducing inhibition, fear and shame and in promoting the victims’ empowerment.

Given the exploratory nature of this study, only descriptive analyzes were conducted.

During the COVID-19 pandemic, little is known about effective RS given by professionals to victims of VAWDV in the Portuguese context. The paper aims to add knowledge to the studied field.

The purpose of this paper is to evaluate the chemical and functional composition of acerola, guava and cashew freeze-dried pomaces.

Fruit pomaces were obtained from the pulp juice industrial sector and submitted to freeze-drying. Samples were analysed for composition (macronutrients, micronutrients, moisture and ash), technological attributes (morphological, hygroscopicity, retention of oil and water and solubility), bioactive compounds (total phenolics, flavonoids, proanthocyanins, anthocyanins, carotenoids and ascorbic acid), antioxidant and antimicrobial properties. Total phenolics, brown pigments and antioxidant activity of thermally treated samples were evaluated. Results were presented as mean and standard deviation, and submitted to Shapiro–Wilk normality test, and ANOVA statistical significance follows by Tukey’s post hoc test (p<0.05). Also, Pearson correlation coefficients were used to test the relationship between selected parameters.

Guava pomace had the highest insoluble fibre (40.6 per cent), protein (13.8 per cent) and lipid (9.3 per cent) contents and acerola higher soluble fibre (14.2 per cent) and water and oil holding capacity (12 and 5.4 g/g, respectively). Cashew pomace had higher solubility (45.3 per cent) and hygroscopicity (11.2 per cent). Acerola pomace had the highest phenolic content (5,331.7 mg AGE/100 g), DPPH and oxygen radical absorbance capacity antioxidant activity (63.3 and 756.6 µmol TE/g). Despite of that none of extracts showed antibacterial activity. All pomaces presented good antioxidant activity retention after thermal treatments (> 70 per cent), which might be correlated to thermally induced brown pigments.

This investigation was motivated by the large amounts of pomaces produced by the fruit pulp and juice processing industries, which represents a waste of residual phytochemicals and cause potential environmental problems. Overall, it was demonstrated that freeze-dried acerola, guava and cashew pomaces are promising ingredients for multiple food applications.

The purpose is to analyse the nutritional adequacy and carbon footprint of intermediated meals provided to preschool children and primary-level students in a Portuguese municipality.

An observational cross-sectional study was conducted with a convenience sampling consisting of school snacks from a Portuguese municipality. The nutritional assessment used food labels and a Portuguese food composition table. The literature review for carbon footprint assessment was conducted by searching for the products under analysis or similar ones.

The results showed that 80% of snacks have a higher energy value than recommended. The majority of options are below recommendations for protein and fat and above recommendations for carbohydrates. The intermediated meals with more dairy products in composition have the highest carbon footprint. The carbon footprint included the packaging of the products, and it wasn't possible to determine the influence of non-food products.

This study has limitations in the fact that we do not know the carbon footprint of Portuguese products and we had to compare them with others, from different countries, with possibly different types of production.

Intermediate meals are inadequate, and the carbon footprint is higher when the intermediated meals include products of animal origin – the reason why the composition of intermediated meals should be redesigned considering the achievement of these targets.

The promotion of intermediated meals that promote the Mediterranean eating pattern contributes to health and well-being and is a vehicle for nutrition education and healthy food consumption in schools.

Many studies have been conducted to analyse the carbon footprint and environmental impact of school meals, but commonly lunch is the meal evaluated and the assessment of intermediated meals' impact is an open field.

This study describes the breast‐feeding profile as well as the consumption of iron source foods and vitamin C source foods for both anaemic and non‐anaemic children. A total of 500 infants attending two Municipal Primary Health‐Care Centres in Rio de Janeiro were assessed. The prevalence of anaemia was 57.6 per cent. A low probability of consumption of exclusive breast‐feeding at four months was found (9 per cent for anaemic and 12 per cent for non‐anaemic). Further findings showed that the early consumption of cow’s milk, as well as the low probability of consumption and late introduction of beans, liver and green vegetables in the child’s diet, were considered risk dietary factors for iron deficiency anaemia among the evaluated children.

The literature on the factors generating loyalty towards tourism destinations has seldom focussed its attention on relationship marketing, which has left a gap in the understanding of destination loyalty. This paper aims to examine the influence of relationship quality on rural destination loyalty, approaching this through the variables of trust, attachment and satisfaction.

This study used a quantitative methodology based on an on line survey conducted in Spain. The sample consisted of 464 tourists who participate in rural tourism. The analysis of the proposed model was carried out based on the partial least squares method.

The results confirm that the model has a substantial to moderate explanatory capacity for overall satisfaction and loyalty, in which overall satisfaction acts as a mediator between the variables that make up relationship quality in reference to loyalty.

The main limitations of this research arise from the scarcity of works which aim to understand relationship quality in tourism destinations. To broaden results, it should be applied in other tourism destinations, products, services and experiences.

Destination managers should give relationships a special role in their tourism development programmes in rural tourism contexts.

Rural tourism destinations and companies are generally small-sized organisations that need managerial tools. These can benefit from developing sustainable relationships.

The significant role played by relationship quality regarding destination loyalty is studied in detail in this model.

La literatura sobre los factores que generan lealtad a los destinos turísticos poco ha centrado su atención en el marketing relacional, lo que ha dejado un vacío en la comprensión de la lealtad al destino. Este artículo examina la influencia de la calidad relacional en la lealtad a los destinos rurales, a través de las variables confianza, apego y satisfacción.

Este estudio usa una metodología cuantitativa basada en una encuesta on line realizada en España. La muestra estaba formada por 464 turistas que practican turismo rural. El análisis del modelo propuesto fue llevado a cabo con el método partial least squares.

Los resultados confirman que el modelo tiene una capacidad explicativa sustancial-moderada para la satisfacción global y la lealtad, en la que la satisfacción global actúa como mediadora entre las variables que conforman la calidad relacional y la lealtad.

La principal limitación de esta investigación surge de la escasez de trabajos cuyo objetivo se centra en la comprensión de la calidad relacional en los destinos turísticos. Para ampliar los resultados, habría de aplicarse en otros destinos, productos, servicios y experiencias turísticas.

Los gestores de destinos deberían otorgar un papel especial a las relaciones en sus programas de desarrollo turístico en el medio rural.

Los destinos y empresas de turismo rural son por lo general organizaciones de pequeñas dimensiones que necesitan herramientas para la gestión. Ellas pueden beneficiarse del desarrollo de relaciones sostenibles.

El papel significativo que juega la calidad relacional con respecto a la lealtad al destino, estudiado en detalle en este modelo.

Marketing relacional, Calidad relacional, Lealtad, Destinos rurales, Partial least squares (PLS)

Artículo de investigación