Stable/unstable holonomies, density of periodic points, and transitivity for continuum-wise hyperbolic homeomorphisms

We discuss different regularities on stable/unstable holonomies of cw-hyperbolic homeomorphisms and prove that if a cw-hyperbolic homeomorphism has continuous joint stable/unstable holonomies, then it has a dense set of periodic points in its non-wandering set. For that, we prove that the hyperbolic cw-metric (introduced in [9]) can be adapted to be self-similar (as in [6]) and, in this case, continuous joint stable/unstable holonomies are pseudo-isometric. We also prove transitivity of cw-hyperbolic homeomorphisms assuming that the stable/unstable holonomies are isometric. In the case the ambient space is a surface, we prove that a cw$_F$-hyperbolic homeomorphism has continuous joint stable/unstable holonomies when every bi-asymptotic sector is regular.Comment: 27 pages, 9 figure

Profile and consumption patterns of non-resident spectators in international sport tourism events

Sporting events create opportunities to develop the local economy of the destination, through the economic impact of the expenses incurred by people who go there to watch it. The aim of this study was to analyse the profile and consumption patterns of non-resident spectators at two international open water events held in Setúbal, in 2022. During the events, 137 questionnaires applied to non-resident spectators were collected. Through multiple linear regression the factors that most influence the total expenditure of spectators were analysed. The results reveal the existence of a small niche of spectators that follow national and international competitions. The accommodation category has a greater weight in the total direct economic impact of events; in turn, spectators who stay overnight in the city, visiting it for the first time, older and with more education, reveal a greater capacity to contribute to the maximization of the direct economic impact of the events. This study highlights the need to define strategies to attract non-resident spectators to enhance accommodation in the city during the events, through an integrated approach, looking forward to integrate events together with the other tourism products offered by the destination. This study emphasizes the advantage of integrating a holistic strategic perspective into the global vision for the city's tourist development and the respective local economy. The importance of developing a strategic events portfolio, aiming to maximize benefits for the destination, would be even bigger by realizing the planning/ strategic leverage in several areas, simultaneously, such as economic, social, environmental, sports, tourist and political.Os eventos desportivos criam oportunidades para desenvolver a economia local do destino, através do impacto económico das despesas realizadas pelas pessoas que aí se deslocam para assistir ao espetáculo desportivo. O objetivo deste estudo foi analisar o perfil e os padrões de consumo dos espectadores não-residentes em dois eventos internacionais de águas abertas realizados em Setúbal, em 2022. Durante os eventos, foram recolhidos 137 questionários, aplicados aos espetadores não residentes. A estatística descritiva foi usada para analisar o perfil e os padrões de consumo dos inquiridos; e através da regressão linear múltipla foram analisados os fatores que mais influenciam a despesa total dos espetadores. Os resultados revelam a existência de um pequeno nicho de espectadores que acompanha as competições nacionais e internacionais, sobretudo alicerçado naqueles que mais praticam natação e natação de águas abertas. A categoria de alojamento tem um maior peso no impacto económico direto total dos eventos; por sua vez, os espectadores que pernoitam na cidade, visitando-a pela primeira vez, mais velhos e mais escolarizados, revelam uma maior capacidade de contribuir para a maximização do impacto económico direto dos eventos. Este estudo destaca a necessidade de serem definidas estratégias para atrair espetadores não residentes para aumentar o alojamento na cidade durante os eventos, através de uma abordagem integrada, perspetivando os eventos juntamente com os outros produtos turísticos oferecidos pelo destino. Este estudo realça, assim, a vantagem de integrar uma perspetiva estratégica holística na visão global para o desenvolvimento turístico da cidade e respetiva economia local. A importância de desenvolver um portefólio estratégico de eventos, visando maximizar os benefícios para o destino, seria ainda maior pela realização de planeamento / alavancagem estratégica em várias áreas, simultaneamente, tais como, económica, social, ambiental, desportiva, turística e política

Major clinical approaches to osseointegrated implants: a concise systematic review

Introduction: Reconstructive surgery is an important component of the specialty of oral and maxillofacial surgery. The maxillofacial skeleton is subject to various types of defects secondary to trauma, craniofacial/congenital deformities, and tumor ablation. The complex anatomy and function of the maxillomandibular complex impact the choice of reconstruction for maxillofacial defects. Objective: It was to carry out a concise systematic review to present the main considerations of osseointegrated implants. Methods: The systematic review rules of the PRISMA Platform were followed. The research was carried out from September to November 2022 in Scopus, PubMed, Science Direct, Scielo, and Google Scholar databases. The quality of the studies was based on the GRADE instrument and the risk of bias was analyzed according to the Cochrane instrument. Results and Conclusion: A total of 127 articles were found, and 57 articles were evaluated and 30 were included in this systematic review. Considering the Cochrane tool for risk of bias, the overall assessment resulted in 10 studies with a high risk of bias and 28 studies that did not meet GRADE. Most studies showed homogeneity in their results, with I2 =95.8% >50%. It was concluded that orofacial defects affect both the form and function of the most prominent and complex part of the body, the face. Several options, such as vascularized flaps, non-vascularized autogenous grafts, or allogeneic materials, are available to reconstruct maxillofacial defects. The complex anatomy and function of the maxillomandibular complex impact the choice of reconstruction for maxillofacial defects. The real effect of bisphosphonates on osseointegration and survival of dental implants is still not well established

Escalonar sistemas de tempo-real de alta críticalidade

Cyclic executives are used to schedule safety-critical real-time systems because of their determinism, simplicity, and efficiency. One major challenge of the cyclic executive model is to produce the cyclic scheduling timetable. This problem is related to the bin-packing problem [34] and is NP-Hard in the strong sense. Unnecessary context switches within the scheduling table can introduce significant overhead; in IMA (Integrated Modular Avionics), cache-related overheads can increase task execution times up to 33% [18]. Developed in the context of the Software Engineering Master’s Degree at ISEP, the Polytechnic Institute of Engineering in Porto Portugal, this thesis contains two contributions to the scheduling literature. The first is a precise and exact approach to computing the slack of a job set that is schedule policy independent. The method introduces several operations to update and maintain the slack at runtime, ensuring the slack of all jobs is valid and coherent. The second contribution is the definition of a state-of-the-art preemptive scheduling algorithm focused on minimizing the number of system preemptions for real-time safety-critical applications within a reasonable amount of time. Both contributions have been implemented and extensively tested in scala. Experimental results suggest our scheduling algorithm has similar non-preemptive schedulability ratio than Chain Window RM [69], yet lower ratio in high utilizations than Chain Window EDF [69] and BB-Moore [68]. For ask sets that failed to be scheduled non-preemptively, 98-99% of all jobs are scheduled without preemptions. Considering the fact that our scheduler is preemptive, being able to compete with non-preemptive schedulers is an excellent result indeed. In terms of execution time, our proposal is multiple orders of magnitude faster than the aforementioned algorithms. Both contributions of this work are planned to be presented at future conferences such as RTSS@Work and RTAS

Bone regeneration processes with the use of biomaterials and molecular and cellular constituents for dental implants

Introduction: When a dental element is lost in the posterior region of the maxilla, there is a natural reabsorption of the alveolar process and, at the same time, pneumatization of the maxillary sinus will occur. For this reason, the maxillary sinus floor elevation procedure should be performed, or short implants when possible. Often the focus is on the type of biomaterial to be used and the success and predictability of our results does not depend only on the biomaterial. It is also necessary to consider the type of defect to be treated, its morphology. The characteristics of the biomaterials to be used must be considered, as well as the characteristics of the bed and the bone defect for treatment. Objective: It was to carry out a concise systematic review of bone regeneration processes using biomaterials and the main molecular and cellular constituents for subsequent dental implantation. Methods: The present study followed by a systematic review model (PRISMA). The search strategy was performed in the PubMed, Cochrane Library, Web of Science and Scopus, and Google Scholar databases. The Cochrane Instrument was used to assess the risk of bias of the included studies. Results and Conclusion: 152 articles involving implantology and biomaterials were found. A total of 64 articles were fully evaluated and 28 were included in the present study. Considering the Cochrane tool for risk of bias, the overall assessment resulted in 5 studies with high risk of bias (studies with small sample size) and 3 studies with uncertain risk (studies with results without statistical significance). The search for a solution for large bone defects directed studies to tissue regeneration therapy or bone regeneration. These studies can promote the use of fillers and epithelial barriers that help in the treatment as an adjuvant to bone graft techniques, favoring greater predictability in alveolar and peri-implant reconstructions and with a good prognosis. The main filler biomaterials can be fibrin-rich plasma, Bio-Oss®. However, it is necessary to understand the chemical, physical and biological processes of both the biological material and the biological niche of the host. Crossing compatible information between microenvironments allows cell recognition and signaling cascades for neovascularization and regeneration and bone filling for successful posterior dental implant

Major considerations of minimally invasive surgery in bucomaxillofacial procedures: quality of life and aesthetics

Introduction: In minimally invasive or atraumatic surgery or dental procedures, there are several clinical studies with increasing expectations to establish treatment guidelines. It is estimated that in minimally invasive dental surgery in general, synthesis studies with meta-analysis and decision analysis represent almost 29% of all studies. Objective: Demonstrate, through a systematic review of the literature, the evolution and consequent importance of improving surgical techniques and/or minimally invasive treatments in dentistry. It was hypothesized that there were statistically significant results on advances in the attempt to minimize trauma, providing quality of life and better aesthetics to patients. Methods: The present study was followed by a systematic review model (PRISMA). The search strategy was performed in the PubMed, Cochrane Library, Web of Science and Scopus, and Google Scholar databases. The Cochrane Instrument was used to assess the risk of bias of the included studies. Results: The total of 92 articles involving minimally invasive surgery and dentistry were found. A total of 54 articles were fully evaluated and 23 were included in the present study. Considering the Cochrane tool for risk of bias, the overall assessment resulted in 3 studies with a high risk of bias (studies with small sample size) and 2 studies with uncertain risk (studies with results without statistical significance). Since the most primordial extraction techniques were created and developed, several attempts have been made to minimize the professional's effort, reduce surgical time and alleviate bleeding and the inflammatory processes, edema, pain, and ecchymosis that can affect patients, in trans and postoperative periods. Thus, the maximum preservation of the integrity of the soft tissues (papillae and free and inserted gingival band) adjacent to the prosthetic spaces should be sought; preservation of the alveolar bone ridge level. Based on the histological concept in which living tissues are formed by cells joined by thin elastic tissue and with nerve fibrils, capillaries, lymphatic and blood vessels. The disruption of these cells by surgical trauma provides the release of enzymes that delay healing. For this reason, surgical trauma should be minimized. Conclusion: There are many attempts to minimize the professional effort, reduce surgical time and alleviate bleeding and inflammatory processes, edema, pain, and ecchymosis that can affect patients. Thus, the maximum preservation of the integrity of the soft tissues adjacent to the prosthetic spaces and the preservation of the level of the ridge of the alveolar bone to achieve a minimization of surgical trauma must be sought

Aspectos históricos e sociais da halitose

Buccal odors have always been a factor of concern for society. This study aims to investigate the historical and social base of halitosis, through systematized research in the database BVS (biblioteca virtual em saúde - virtual library in health) and also in books. Lack of knowledge on how to prevent halitosis allows for its occurrence, limiting quality of life. As social relationships are one of the pillars of the quality of life concept, halitosis needs to be considered a factor of negative interference. Education in health should be accomplished with a view to a dynamic balance, involving human beings' physical and psychological aspects, as well as their social interactions, so that individuals do not become jigsaw puzzles of sick parts.Los olores bucales siempre han sido un factor de preocupación para la sociedad, y ellos todavía son ahora. El objetivo de este estudio es hacer una base histórica y social en la halitosis. Fue efectuada una investigación sistematizada en la base de datos BVS (biblioteca virtual em saúde - la biblioteca virtual en salud) y también en los libros. La ignorancia en cómo prevenir la halitosis permite su ocurrencia, que limita la calidad de vida. Siendo las relaciones sociales uno de los pilares del concepto de calidad de vida, es necesario considerar la halitosis un factor de interferencia negativa. La educación en salud se debe llevar a cabo buscando un equilibrio dinámico, involucrando los aspectos físicos y psicológicos del ser humano, así como sus interacciones sociales, para que los individuos no se vuelvan rompecabezas de partes enfermas.O problema referente aos odores bucais sempre foi fator de preocupação para a sociedade e ainda hoje se mostra presente. O objetivo do presente estudo foi realizar um embasamento histórico e social sobre a halitose. Para tanto, foi feita busca sistematizada, selecionando artigos por meio da base de dados BVS (Biblioteca Virtual em Saúde) e também pesquisa em livros. O desconhecimento sobre como prevenir halitose permite a sua ocorrência, limitando a qualidade de vida. Sendo os relacionamentos sociais um dos pilares do constructo qualidade de vida, é preciso considerar a halitose como fator de interferência negativa. A educação em saúde deve ser realizada visando o equilíbrio dinâmico, envolvendo aspectos físicos e psicológicos do ser humano, assim como suas interações sociais, para que os indivíduos não se tornem quebra-cabeças de partes doentes