Augmented reality and user experience (UX) in the dissemination of digital content from Portuguese museums

No presente artigo salienta-se a importância que os museus atribuem às novas tecnologias e em melhorar a Experiência dos Utilizadores (UX) recorrendo à tecnologia de Realidade Aumentada na divulgação de conteúdos digitais, entre o espaço físico e digital do museu. Numa primeira fase procurou-se entender a perceção e interação dos utilizadores através de indicadores de análise de conteúdo, pela plataforma digital Instagram, associando três empresas de Realidade Aumentada. Numa segunda fase, procurando estabelecer ligação à vertente de negócio, à adoção e aceitação tecnológica, realizaram-se entrevistas aos departamentos de comunicação de três Museus Portugueses De uma forma geral, foi possível reconhecer a importância e o potencial de crescimento em associar a tecnologia de Realidade Aumentada na divulgação de conteúdos digitais, seja de acordo com o panorama cultural, histórico ou turístico em Portugal. Os resultados obtidos são pressupostos de aplicabilidade nos museus, associados ao estudo de caso: a Startup Nimest.info:eu-repo/semantics/publishedVersio

Formation of oriented nickel aggregates in rutile single crystals by Ni implantation

The magnetic and electrical properties of Ni implanted single crystalline TiO2 rutile were studied for nominal implanted fluences between 0.5 x 10(17) cm(-2) and 2.0 x 10(17) cm(-2) with 150 keV energy, corresponding to maximum atomic concentrations between 9 at% and 27 at% at 65 nm depth, in order to study the formation of metallic oriented aggregates. The results indicate that the as implanted crystals exhibit superparamagnetic behavior for the two higher fluences, which is attributed to the formation of nanosized nickel clusters with an average size related with the implanted concentration, while only paramagnetic behavior is observed for the lowest fluence. Annealing at 1073 K induces the aggregation of the implanted nickel and enhances the magnetization in all samples. The associated anisotropic behavior indicates preferred orientations of the nickel aggregates in the rutile lattice consistent with Rutherford backscattering spectrometry-channelling results. Electrical conductivity displays anisotropic behavior but no magnetoresistive effects were detected. (C) 2013 Elsevier B.V. All rights reserved

Stability of hybrid versus vaccine immunity against BA.5 infection over 8 months

© 2022 Elsevier Ltd. All rights reserved.The coverage of SARS-CoV-2 vaccination in large parts of the world, together with the high number of breakthrough infections, especially following the emergence of Omicron subvariants, makes hybrid immunity (resulting from vaccine and infection) common. Hybrid immunity, particularly after BA.1 or BA.2 infection, confers substantial protection against the BA.5 infection. However, although the waning of protection afforded by natural infection in non-vaccinated individuals or by vaccination has been well documented, the stability of hybrid immunity, specifically against the BA.5 subvariant, now dominant in many countries, has not been thoroughly addressed.info:eu-repo/semantics/publishedVersio

Comparison of the Thermal Inactivation Kinetics of Byssochlamys fulva and Three Enzymes used as TTIs for Various Food Processes under Conventional and Ohmic Heating

Ohmic heating technology has regained interest for aseptic food processing of highly viscous fluids (e.g. fruit pulps and purees) or particulate fluids. The industrial application of this technology is fully dependent on its validation with experimental data in order to evaluate the effects of the electric field on microorganisms, enzymes and biological tissues. This work aims at determining the effect of an electric field on the thermal inactivation kinetics of a highly heat resistant microorganism (Byssochlamys fulva - an ascospore producer thermophilic fungus) and also on the inactivation kinetics of several enzymes used as time-temperature integrators (TTIs) (lipoxygenase - LOX, polyphenoloxidase - PPO and alkali phosphatase - PA). For both ohmic and conventional processes, and for similar samples thermal histories, the corresponding D-values were determined, leading to the calculation of the z-value, the activation energy (Ea) and the pre-exponential factor (k) of Arrhenius equation. B. fulva death kinetics were determined in an industrial strawberry pulp (14.5 ºBrix, pH=4.0); PA inactivation was determined in raw milk and PPO and LOX inactivation was determined in buffer. In all cases first order inactivation kinetics were observed. The experimental D values for B. fulva obtained under ohmic heating (Doh) conditions were half the ones obtained for conventional heating (Dconv) (T=85 ºC, Dconv=7.23; Doh=3.27). Similar results were found for PPO: ohmic D values were three times lower than those for conventional heating (T=75 ºC, Dconv=61.61; Doh=19.37). For LOX, D values were lower for ohmic heating but z and Ea values were slightly higher when compared to conventional heating. For PA no significant differences were found between the two heating processes in terms of D, z or Ea values. The electric field reduces the D values for both enzymes and microorganisms but z and Ea values are not greatly affected by the electric field. The obtained kinetics will be used to validate thermal processing in a pilot scale continuous ohmic heater.info:eu-repo/semantics/publishedVersio

Economic analysis of family trout farming in Southern Brazil.

Thus, the objective of the present study was to analyze the economic feasibility of trout farming on family farms in the Serra Catarinense region, SC, Brazil, comparing two profiles of farming by characterizing their different scales of production

Ongoing monkeypox virus outbreak, Portugal, 29 April to 23 May 2022

Up to 27 May 2022, Portugal has detected 96 confirmed cases of monkeypox. We describe 27 confirmed cases (median age: 33 years (range: 22–51); all males), with an earliest symptom onset date of 29 April. Almost all cases (n = 25) live in the Lisbon and Tagus Valley health region. Most cases were neither part of identified transmission chains, nor linked to travel or had contact with symptomatic persons or with animals, suggesting the possible previously undetected spread of monkeypox.info:eu-repo/semantics/publishedVersio

Postoperative outcomes in oesophagectomy with trainee involvement

BACKGROUND: The complexity of oesophageal surgery and the significant risk of morbidity necessitates that oesophagectomy is predominantly performed by a consultant surgeon, or a senior trainee under their supervision. The aim of this study was to determine the impact of trainee involvement in oesophagectomy on postoperative outcomes in an international multicentre setting. METHODS: Data from the multicentre Oesophago-Gastric Anastomosis Study Group (OGAA) cohort study were analysed, which comprised prospectively collected data from patients undergoing oesophagectomy for oesophageal cancer between April 2018 and December 2018. Procedures were grouped by the level of trainee involvement, and univariable and multivariable analyses were performed to compare patient outcomes across groups. RESULTS: Of 2232 oesophagectomies from 137 centres in 41 countries, trainees were involved in 29.1 per cent of them (n = 650), performing only the abdominal phase in 230, only the chest and/or neck phases in 130, and all phases in 315 procedures. For procedures with a chest anastomosis, those with trainee involvement had similar 90-day mortality, complication and reoperation rates to consultant-performed oesophagectomies (P = 0.451, P = 0.318, and P = 0.382, respectively), while anastomotic leak rates were significantly lower in the trainee groups (P = 0.030). Procedures with a neck anastomosis had equivalent complication, anastomotic leak, and reoperation rates (P = 0.150, P = 0.430, and P = 0.632, respectively) in trainee-involved versus consultant-performed oesophagectomies, with significantly lower 90-day mortality in the trainee groups (P = 0.005). CONCLUSION: Trainee involvement was not found to be associated with significantly inferior postoperative outcomes for selected patients undergoing oesophagectomy. The results support continued supervised trainee involvement in oesophageal cancer surgery

Adoção de sistemas de integração lavoura-pecuária-floresta (ILPF) em São Paulo.

Este estudo objetivou caracterizar a adoção dos sistemas de integração no Estado de São Paulo e identificar demandas. Uma amostra de 175 propriedades rurais, sendo 66 adotantes de sistemas de Integração Lavoura-Pecuária (ILP), 24 adotantes de sistemas de Integração PecuáriaFloresta (IPF) e 85 não adotantes de sistemas integrados, compôs a base de dados analisados por meio de estatística descritiva e teste qui-quadrado (x2) de Pearson. Os resultados indicam que os adotantes de sistemas ILP possuem maior experiência com atividades agrícolas, participação mais frequente em cooperativas agrícolas, palestras e dias de campo, bem como recebem mais orientação técnica. O acesso ao crédito rural e o uso mais frequente de mecanismos para gestão do risco climático e econômico estão associados ao componente agrícola do ILP. O fator escala de produção explica propriedades rurais mais extensas e estrutura mais robusta de máquinas agrícolas. A adoção dos sistemas IPF encontra-se em fase experimental nas propriedades rurais. Esses adotantes contam com outra fonte de renda, o que os confere maior flexibilidade para testar o sistema, em sua maioria, implantado de forma escalonada na área de pastagem e com recursos próprios. Predominam propriedades rurais menores, com relevo mais ondulado, solos arenosos, rebanhos menores e concentrados nas fases de cria/recria, além de maior diversificação da produção.bitstream/item/214315/1/AdocaoSistemasIntegracao.pd