Realidade Aumentada Móvel num Contexto de Herança Cultural

A realidade aumentada tem um elevado potencial de utilização nas mais diversas áreas de atuação, nomeadamente, em contextos de herança cultural onde torna possível exibir, in loco, elementos virtuais que complementam a informação real que envolve o utilizador. A par com a evolução tecnológica, diferentes formas de experienciar esta tecnologia têm vindo a ser exploradas, possibilitando, assim, novas formas de interação com a realidade aumentada.Esta investigação pretende avaliar a implementação de diferentes sistemas de realidade aumentada móvel - com recurso a smartphone - nas ruínas romanas, inseridas no Museu Monográfico de Conimbriga, e avaliar o seu impacto junto dos visitantes desse espaço. A atual oferta de diferentes formas de implementar sistemas de realidade aumentada, possibilitam uma utilização alargada da tecnologia, mas, dependendo do propósito de cada utilização, é desafiante, a quem desenvolve estes sistemas, conseguir identificar qual a solução mais adequada. Assim, neste estudo, são implementados protótipos de realidade aumentada com base em diferentes técnicas e com recurso a diferentes ferramentas, cuja avaliação tem em vista a identificação de uma solução a ser implementada num contexto de herança cultural. Tendo como caso de estudo as ruínas do Museu Monográfico de Conimbriga, o protótipo final desenvolvido nesta investigação é testado e avaliado in-situ

Multisensory Augmented Reality in Cultural Heritage: Impact of Different Stimuli on Presence, Enjoyment, Knowledge and Value of the Experience

Little is known about the impact of the addition of each stimulus in multisensory augmented reality experiences in cultural heritage contexts. This paper investigates the impact of different sensory conditions on a user’s sense of presence, enjoyment, knowledge about the cultural site, and value of the experience. Five different multisensory conditions, namely, Visual, Visual + Audio, Visual + Smell, and Visual + Audio + Smell conditions, and regular visit referred to as None condition, were evaluated by a total of 60 random visitors distributed across the specified conditions. According to the results, the addition of particular types of stimuli created a different impact on the sense of presence subscale scores, namely, on spatial presence, involvement, and experienced realism, but did not influence the overall presence score. Overall, the results revealed that the addition of stimuli improved enjoyment and knowledge scores and did not affect the value of the experience scores. We concluded that each stimulus has a differential impact on the studied variables, demonstrating that its usage should depend on the goal of the experience: smell should be used to privilege realism and spatial presence, while audio should be adopted when the goal is to elicit involvement.info:eu-repo/semantics/publishedVersio

Technology as Means to Recreate Cultural Heritage: An assessment of some current Portuguese projects

info:eu-repo/semantics/publishedVersio

Effects on gastric mucosa induced by dental bleaching – an experimental study with 6% hydrogen peroxide in rats

The value of aesthetic dentistry has precipitated several developments in the investigation of dental materials related to this field. The free marketing of these products is a problem and it is subject to various interpretations regarding its legality. There are several techniques for tooth whitening, the most used one being the external bleaching. It is the later version of such technique that poses the greatest danger of ingesting the product. The present study analysed the systemic effect of these products when they are swallowed.Objective This experimental study aimed to observe the effects of a tooth whitening product, whose active agent is 6% hydrogen peroxide, on the gastric mucosa of healthy and non-tumour gastric pathology animals.Material and Methods Fifty Wistar-Han rats were used and then distributed into 5 groups, one for control and four test groups in which the bleaching product was administered in animals with and without non-tumour gastric pathology (induced by the administration of 1 sample of 50% ethanol and 5% of drinking water during 6 days) at different times of study by gavage. There was a decrease in body weight in animals of groups handled during the study period, which was most pronounced in IV and VA groups. Changes in spleen weight relative to body weight revealed no statistically significant changes. An analysis of the frequency was performed on the results of macroscopic observation of the gastric mucosa.Results The gastric mucosa revealed lesions in all manipulated groups, being more frequent in groups III and IV. It appears that there is a synergism when using hydrogen peroxide and 50% ethanol in the same group.Conclusion Therefore, it seems that there are some signs of toxicity 3 to 4 days after administration of 6% hydrogen peroxide. The prescription of these therapies must be controlled by the clinician and the risks must be minimized

Evaluation of dentinogenesis inducer biomaterials: an in vivo study

When exposure of the pulp to external environment occurs, reparative dentinogenesis can be induced by direct pulp capping to maintain pulp tissue vitality and function. These clinical situations require the use of materials that induce dentin repair and, subsequently, formation of a mineralized tissue. Objective: This work aims to assess the effect of tricalcium silicate cements and mineral trioxide aggregate cements, including repairing dentin formation and inflammatory reactions over time after pulp exposure in Wistar rats. Methodology: These two biomaterials were compared with positive control groups (open cavity with pulp tissue exposure) and negative control groups (no intervention). The evaluations were performed in three stages; three, seven and twenty-one days, and consisted of an imaging (nuclear medicine) and histological evaluation (H&E staining, immunohistochemistry and Alizarin Red S). Results: The therapeutic effect of these biomaterials was confirmed. Nuclear medicine evaluation demonstrated that the uptake of 99mTc-Hydroxymethylene diphosphonate (HMDP) showed no significant differences between the different experimental groups and the control, revealing the non-occurrence of differences in the phosphocalcium metabolism. The histological study demonstrated that in mineral trioxide aggregate therapies, the presence of moderate inflammatory infiltration was found after three days, decreasing during follow-ups. The formation of mineralized tissue was only verified at 21 days of follow-up. The tricalcium silicate therapies demonstrated the presence of a slight inflammatory infiltration on the third day, increasing throughout the follow-up. The formation of mineralized tissue was observed in the seventh follow-up day, increasing over time. Conclusions: The mineral trioxide aggregate (WhiteProRoot®MTA) and tricalcium silicate (Biodentine™) present slight and reversible inflammatory signs in the pulp tissue, with the formation of mineralized tissue. However, the exacerbated induction of mineralized tissue formation with the tricalcium silicate biomaterial may lead to the formation of pulp calcifications

What Is the Most Effective Technique for Bonding Brackets on Ceramic-A Systematic Review and Meta-Analysis

Background: There has been an increase in demand for orthodontic treatment within the adult population, who likely receive restorative treatments using ceramic structures. The current state of the art regarding the most effective method to achieve an appropriate bond strength of brackets on ceramic surfaces isn't consensual. This systematic review aims to compare the available surface treatments to ceramics and determine the one that allows to obtain the best bond strength. Methods: This systematic review followed the PRISMA guidelines and the PICO methodology was used, with the question "What is the most effective technique for bonding brackets on ceramic crowns or veneers?". The research was carried out in PubMed, Web of Science, Embase and Cochrane Library databases. In vitro and ex vivo studies were included. The methodological quality was evaluated using the guidelines for reporting of preclinical studies on dental materials by Faggion Jr. Results: A total of 655 articles searched in various databases were initially scrutinized. Sevety one articles were chosen for quality analysis. The risk of bias was considered medium to high in most studies. The use of hydrofluoric acid (HF), silane and laser afforded the overall best results. HF and HF plus laser achieved significantly highest bond strength scores in felsdphatic porcelain, while laser was the best treatment in lithium disilicate ceramics. Conclusions: The most effective technique for bonding brackets on ceramic is dependent on the type of ceramic

Sim Handbook - A practical guide for applying Social Marketing in the disability sector

This handbook is one of the outputs of the SIM project, funded by the European Erasmus+ Programme (grant ID 2019-1-PT01-KA204-060716), which tackles the need to improve the social inclusion of disadvantaged groups, specifically those with disabilities. The handbook can be used as guided course curriculum or as a self-study book. The handbook will contribute to social sector to integrate a methodology very useful to tackle problems from a practical perspective. THE HANDBOOK IS DESIGNED FOR: • Social educators in charge of improving the competences of disadvantaged groups (midstream level) and their supervisors (strategic level). In other words, people working in social inclusion about social inclusion programmes as well as front line professionals. • University Professors who integrate it into their curricula of marketing, health, and social marketing studies. THE HANDBOOK IS AIMED TO BENEFIT: • Midstream level professionals: social educators such as social workers, psychologists, occupational therapists and employment mediators which directly work improving the competences of people with disabilities. The relationships developed in the disability sector between front-line professionals and customers are unique, genuine and long-lasting; and • Upstream level professionals: decision takers, managers of organizations, training program developers who supervise the tasks of educators, providing the training needed organizational resources. THE HANDBOOK WILL IMPROVE THE COMPETENCES OF SOCIAL EDUCATORS AND COORDINATORS TO: a) social marketing techniques and strategies; b) the English language; c) dealing with social inclusion problems from a different perspective; d) critical thinking; e) searching for and making use of relevant, trustworthy information2019-1-PT01-KA204-06071

Pedagogical strategy. Social marketing for social inclusion: case studies

The Social Inclusion Marketing (SIM) Project, which is financed by the Erasmus+ Programme, is the outcome of a concerted 3-year effort between partners and specialists who have developed specialized training on social marketing strategies to put into practice in social organizations. In sum, the motto is Social Marketing for Social Inclusion. It builds on the experience and expertise of four partner organizations – two universities and two nonprofit institutions working with people with disabilities. Their approach is based on practical training and study cases learning, action research and inter-disciplinary thinking. The project was designed to integrate the theoretical framework of social marketing and social inclusion fields to provide better services and quality of life of people with disabilities and their families. It focuses on looking through the needs of disability professionals when faced with a problem and finding solutions under the social marketing lens.2019-1-PT01-KA204-06071

Isolation and Identification of Cytotoxic Compounds Present in Biomaterial Life®

Direct pulp capping consists of a procedure in which a material is directly placed over the exposed pulp to maintain dental vitality. Although still widely used in clinical practice, previous in vitro studies found that the biomaterial Life® presented high cytotoxicity, leading to cell death. This study aimed to identify the Life® constituents responsible for its cytotoxic effects on odontoblast-like cells (MDPC-23). Aqueous medium conditioned with Life® was subjected to liquid-liquid extraction with ethyl acetate. After solvent removal, cells were treated with residues isolated from the organic and aqueous fractions. MTT and Trypan blue assays were carried out to evaluate the metabolic activity and cell death. The organic phase residue promoted a significant decrease in metabolic activity and increased cell death. On the contrary, no cytotoxic effects were observed with the mixture from the aqueous fraction. Spectroscopic and spectrometric methods allowed the identification of the toxic compounds. A mixture of the regioisomers ortho, para, and meta of N-ethyl-toluenesulfonamide was identified as the agent responsible for the toxicity of biomaterial Life® in MDPC-23 cells. These findings contribute to improving biomaterial research and development