Browsing by Issue Date, starting with "2018-12"
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- Tourist management: Destinations management structure in Algarve-Portugal and Foz do Iguacu-BrazilPublication . Fontana, Rosislene de Fatima; Gadotti dos Anjos, Sara J.; Pinto, PatríciaCompetitiveness among tourist destinations has increasingly required its managers to stay in the market. Thus, the management of the destination should be made up of people from both the public and private sectors, looking for a better management of the resources of the destination. The objective of this article is to recognize the tourism management structure of two internationally renowned destinations: the Algarve, situated in the south of Portugal, one of the main tourist destinations in this European country; and Foz do Iguacu, Brazil, located on the triple border with Argentina and Paraguay, the third most visited tourist destination in the country. This is an exploratory descriptive research, with a qualitative approach, involving bibliographical and documentary research. The results indicate that in both destinations, public and private organizations are present in the management process, even though they have different structures.
- Short Form of the Social Anxiety Scale for Adolescents among community and institutionalized Portuguese youthsPublication . Nunes, Cristina; Ayala-Nunes, Lara; Pechorro, Pedro; Greca, Annette M. LaBackground/Objective: Social anxiety is a common issue arising in adolescence that can cause significant impairment and have detrimental consequences for development in the absence of treatment. In this study we examined the factor structure and the psychometric properties of a 12-item short form of the Portuguese-Language Social Anxiety Scale for Adolescents (SAS-A-SF). Method: A community adolescent sample (N = 835) and a young offender sample (N = 244) completed the SAS-A, the Basic Empathy Scale and the Reactive-Proactive Aggression Questionnaire. Confirmatory factor analysis, internal consistency, cross gender and cross sample invariance, convergent and discriminant validity of the SAS-A-SF were analyzed. Results: The confirmatory factor analysis revealed that the 3-factor second-order model obtained the best fit. The results provided evidence that the SAS-A-SF is a psychometrically sound instrument that shows measurement invariance across genders and across samples, good reliability and positive correlations with empathy. Conclusions: The Portuguese version of SAS-A-SF is a useful, time-efficient tool for both researchers and practitioners who need to assess social anxiety, a relevant construct in adolescent psychopathology. (C) 2018 Asociacion Espanola de Psicologia Conductual. Published by Elsevier Espana, S.L.U.
- Forest fringe communities of the southwestern Iberian PeninsulaPublication . Quinto Canas, Ricardo; Mendes, Paula; Cano-Ortiz, Ana; Maria Musarella, Carmelo; Pinto-Gomes, CarlosIntroduction: Forest and pre-forest fringe communities in the southwest of the Iberian Peninsula are semi-shaded perennial herbs of external fringe and open areas of evergreen or semideciduous woodlands and their pre-forestry mantles, linked to the Stachyo lusitanicae-Cheirolophenion sempervirentis suballiance. Objective: To evaluate the chorology, ecological features and floristic circumscription of the forest fringe communities of the southwestern Iberian Peninsula. Materials and methods: Forest fringe communities adscribed to the Stachyo lusitanicae-Cheirolophenion sempervirentis suballiance were analysed, using phytosociological approach (Braun-Blanquet methodology) and numerical analysis (hierarchical cluster analysis). Results and discussion: The statistical and phytosociological analysis of six formerly described associations and the samples of this study lead us to propose a new forest fringe association: Picrido spiniferae-Cynarietum algarbiensis, dominated by Cynara algarbiensis Coss. ex Mariz. This forest fringe community is characteristic of the thermomediterranean to mesomediterranean, lower sub-humid bioclimate and occurs in the potential areas of the Quercus suber L. forests (Lavandulo viridis-Quercetum suberis), mainly in the Monchique Sierran District. Conclusion: The statistical and phytosociological analysis were useful in the evaluation of forest fringe communities in the southwest of the Iberian Peninsula. Regarding the proposal of the new association Picrido spiniferae-Cynarietum algarbiensis, it is important to develop management strategies for the preservation of the endemic C. algarbiensis.
- Microrheology of novel cellulose stabilized oil-in-water emulsionsPublication . Medronho, Bruno; Filipe, A.; Costa, C.; Romano, Anabela; Lindman, B.; Edlund, H.; Norgren, M.Diffusing wave spectroscopy (DWS) is a powerful optical technique suitable to investigate turbid samples in a nondestructive and reproducible way, providing information on the static and dynamic properties of the system. This includes the relative displacement of emulsion droplets over time and changes in the viscoelastic properties. Here, novel and promising cellulose-based oil-in-water (O/W) emulsions were prepared and studied, for the first time, by DWS. Cellulose plays the role of a novel eco-friendly emulsifying agent. The hydrolysis time of cellulose was observed to affect the average size of the emulsion droplets and their stability; the longer the hydrolysis time, the more dispersed and stable the emulsions were found to be. Additionally, a good complementarity between the microrheology (DWS) and macrorheology (mechanical rheometer) data was found. Our work suggests that DWS is a highly attractive method to investigate the stability, aging and microrheology properties of cellulose-based emulsions, providing valuable insights on their microstructure. This technique is thus highly appealing for the characterization and design of novel emulsion formulations. (C) 2018 The Authors. Published by Elsevier Inc.
- Produção biológica sem solo, não. Porquê?Publication . Reis, MárioÉ consensual a necessidade de produzir alimentos de qualidade e de reduzir o impacte da sua produção no ambiente, o que justifica normas de produção agrícola, como as do Reg. UE nº 2018/848, de 30 de Maio, que define as condições para a produção biológica a partir de Janeiro de 2021, substituindo o vigente Reg. UE nº 834/2007. No entanto, a exigência de o cultivo se efectuar exclusivamente no solo, ignorando o desenvolvimento científico e técnico do último século, é uma condição que não beneficia nem protege quer os consumidores quer o ambiente.
- Multi-scale modelling of waves propagation on the Norwegian CoastPublication . Sánchez, Alonso Madrigal; Bihs, Hans; Jacob, JoséFjords coastlines are attributed to glaciers as the main agent of erosion. Thus, fjords are characterised by an irregular coastline con guration and rapid changes in their deep and steep slopes. These features generate a unique behaviour on the ocean wave propagation and on the water hydrodynamics. Norwegian coastline has environmental conditions to support diverse aquaculture developments along the coast. Therefore, aquaculture in Norway is considered a growing eld with an enormous potential especially in o shore locations. The development of numerical tools, such as wave models, will produce a huge improvement on the di erent technologies used nowadays. To achieve this huge engineering challenge a simulation of the ocean waves reaching the Norwegian fjords will be analysed using coupled numerical models. This study proposed a combined use of two di erent numerical models, cascade of wave models, to utilise the strengths of the models while reducing their disadvantages. For example, spectral wave model such as STWAVE is fast in open ocean but not able to capture the di raction phenomenon, shallow water model such as REEF3D::SFLOW is able to capture most wave transformation phenomenon but limited by water depth; Computational Fluid Dynamic (CFD) model such as REEF3D::CFD captures threedimensional details of water wave but is computationally costly. The results obtained from the large domain and coarse grid model will serve as the input to the next region with middle resolution and a re ned grid size. This is carried on until the results for the area of interest are obtained. A rst step validating the reliability of REEF3D::SFLOW was carried out through the use of a submerged bar case. During the process of testing the feasibility of the cascade of wave models methodology, di erent models were evaluated for speci c domain and topography. As a result, only two models were applied on the nal simulation: STWAVE and REEF3D::CFD. Thus, the combined methodology resulted useful to obtain a rough estimation of the wave propagation and transformation outside the fjords and its potential e ects over Flat ya sh farm development. It can be also an important input for their sh cage design.
- Decision framework for the design and construction of autonomous artificial reefsPublication . Johnson, Jessica; Duarte, DuarteThis thesis focused on the testing and design of an innovative Artificial Reef geometry, as part of the decision framework for the planning, design, construction, placement and subsequent monitoring of a Modular Artificial Reef (MAR). The MAR will be installed off the west coast of Portugal to promote fish biodiversity, increase biomass and to serve as a SCUBA diving point of interest for tourists. Through physical hydraulic flume testing, the Prototype Modular Artificial Reef (PMAR) underwent environmental scenarios to evaluate the current design. These environmental scenarios were designed to imitate both constant flow and wave energy environments. An Acoustic Doppler Velocimeter (ADV) was used to measure flow velocities both upstream and downstream the PMAR to quantify the impact of the PMAR on water flow. After testing, digital photographs were used to create Digital Elevation Models which were overlaid on the original photographs to create an Orthomosaic image. This orthomosaic illustrated the sediment transportation changes in and around the PMAR throughout various testing scenarios. By studying areas of scour and erosion, it was possible to see the impact of the PMAR on sediment transportation. Through testing, sediment was transported along the water flow direction. Overall erosion and scoring increased when wave energy was added to the system. In general, there was erosion around the front end of the PMAR and deposition around the back end. This led to a sinking effect of the entire PMAR with a slight rotation in the same direction as the water flow. It is recommended that a baseplate be added to the design to ensure stability, minimize sinking and prevent the PMAR from overturning in high energy wave conditions. In addition, further testing with multiple modular pieces linked together is required to ensure that the modular design can withstand these environmental strains.
- Benthic foraminiferal distribution influenced by rivers on the northern gulf of Cadiz continental shelfPublication . Alexander, Olivia Helen Barbara; Ferreira, Óscar; Mendes, Isabel Maria de Paiva PintoBenthic foraminifera are widely used as bioindicators due to their sensitivity to environmental stimuli and global distribution. Understanding their ecology is a fundamental factor in interpreting their distribution patterns. This dissertation assesses the distribution of benthic foraminifera as related to rivers on the northern Gulf of Cadiz continental shelf, a highly productive zone with strong fluvial influences. In this study, the distribution of living (stained) and dead benthic foraminifera from six surface sediment samples, collected on the Gulf of Cadiz continental shelf, along two profiles off the Tinto-Odiel and Guadalquivir Rivers, were analyzed. The distribution of the living fauna was compared with the main oceanographic parameters, temperature and salinity, in order to obtain indicator species in present-day shelf environments. 13 species at relatively high abundances (>5%) were identified for the living assemblage. From these, two biofacies were defined and related with their abundances and locations on the shelf. Biofacies I, associated with higher depths (55 m to 91 m), contained Brizalina spathulata/dilatata, Cassidulina laevigata, Cassidulina minuta, Epistominella vitrea, Bulimina elongata, Rectuvigerina phlegeri, and Bolivina striatula. Biofacies II, associated with shallower depths (23 m to 39 m) and river influence, contained Brizalina seminuda, Nonionella stella, Bolivina ordinaria, Textularia earlandi, Hopkinsina atlantica, Ammonia beccarii/tepida. These results were compared with samples collected in 2001, which had some differences in the most abundant (>5%) species, relative to those found in 2015. These findings will constitute a baseline for future studies on the ecology of foraminifera and their distribution on the northern Gulf of Cadiz continental shelf.
- Reabilitação urbana da vila de Alcoutim: proposta de criação de uma rede integrada de alojamento como estratégia de turismo sustentável em áreas de baixa densidadePublication . Boto, Raquel Susana de Carvalho; Costa, Miguel ReimãoO abandono e desertificação dos territórios do interior são uma realidade de norte a sul do país, levando à reflexão em torno das políticas e medidas de combate à desertificação, com aposta em medidas no âmbito dos fundos comunitários, da reabilitação urbana, e do turismo, que visem o desenvolvimento local em espaço rural. Este trabalho aponta para uma reflexão sobre a realidade do território de Alcoutim, no sentido de averiguar a melhor forma de implementar uma estratégia de turismo sustentável, através da criação de um modelo de rede integrada de alojamento turístico, onde a autarquia terá um papel determinante ao assumir-se como gestora e dinamizadora do projeto, tentando captar o interesse e envolvimento da população local e dos proprietários e/ou investidores privados. Pretende-se, através da pesquisa bibliográfica e com trabalho de campo, caracterizar e identificar no conjunto edificado da vila de Alcoutim as edificações com aptidão para integração na rede de alojamento a propor; bem como o levantamento do conjunto de instrumentos de financiamento disponíveis para a sua implementação. Apesar da sua pequena escala no conjunto do mercado turístico da região, este projeto poderá dar uma valiosa contribuição para a sustentabilidade da economia local, com a reabilitação e ocupação do património construído e consequente criação de emprego.
- Bixa orellana L.Publication . Vieira, Mónica Maria Órfão; Miguel, Maria GraçaBixa orellana L., conhecida também por urucum, pertence à família Bixaceae, e foi uma das primeiras plantas a serem cultivadas na floresta Amazónica, com uma longa tradição na aplicação medicinal. Quando os portugueses chegaram à nova colónia, Pedro Vaz de Caminha o escrivão da frota, deixou registadas as primeiras impressões do local e dos habitantes, referindo esta planta. Esta monografia descreve as particularidades fitoquímicas e farmacológicas desta espécie vegetal bem como do corante que dela se extrai, que possui uma coloração avermelhada devido à presença do carotenoide bixina, presente nas sementes ou no seu pericarpo. Os principais compostos ativos do urucum são a bixina que é lipossolúvel e a norbixina que é hidrossolúvel. Estas têm também aplicações comerciais e as suas diferenças estruturais resultam em particularidades a nível da polaridade, solubilidade, coloração e, por consequência, determinam aplicações tecnológicas singulares. O corante bixina tem diversas aplicações, nomeadamente nas seguintes áreas: indústrias alimentícia, farmacêutica, cosmética e como corante. Este corante é comercialmente conhecido como E160b, sendo considerado seguro para o consumo humano. Contudo, as várias partes da planta apresentam constituintes químicos de Bixa orellana que apresentam várias aplicações a nível medicinal.