A multi-layer probing approach for video over 5G in vehicular scenarios

Fifth generation (5G) technologies are becoming a reality throughout the world. In parallel, vehicular networks rise their pace in terms of utilization; moreover, multimedia content transmissions are also getting an always increasing demand by their users. Besides the promised performance of 5G networks, several questions still arise among the community: are these networks capable of delivering high quality video streaming services in moving scenarios? What is the relationship between the network conditions and the video quality of experience? To answer to the previous questions, in this paper we propose a multi-layer probing approach able to assess video transmissions over 5G and 4G, combining data from all layers of a communication model, relating events from its origin layers. The probe's potential is thoroughly evaluated in two distinct video streaming use cases, both targeting a vehicular scenario supported by cellular 4G and 5G networks. Regarding the probe's performance, we show that a multitude of performance and quality indicators, from different stack layers, can be obtained. As for the performance of 4G and 5G networks in video streaming scenarios, the results have shown that the 5G links show a better overall performance in terms of video quality-of-experience, granting lower delays and jitter conditions, thus allowing video delay to be diminished and segment buffering to be better performed in comparison to 4G, while still showing adaptability in lightly traffic-saturated vehicular-to-vehicular scenarios.info:eu-repo/semantics/publishedVersio

Network Formation of Catanionic Vesicles and Oppositely Charged Polyelectrolytes. Effect of Polymer Charge Density and Hydrophobic Modification

In nonequimolar solutions of a cationic and an anionic surfactant, vesicles bearing a net charge can be spontaneously formed and apparently exist as thermodynamically stable aggregates. These vesicles can associate strongly with polymers in solution by means of hydrophobic and/or electrostatic interactions. In the current work, we have investigated the rheological and microstructural properties of mixtures of cationic polyelectrolytes and net anionic sodium dodecyl sulfate/didodecyldimethylammonium bromide vesicles. The polyelectrolytes consist of two cationic cellulose derivatives with different charge densities; the lowest charge density polymer contains also hydrophobic grafts, with the number of charges equal to the number of grafts. For both systems, polymer−vesicle association leads to a major increase in viscosity and to gel-like behavior, but the viscosity effects are more pronounced for the less charged, hydrophobically modified polymer. Evaluation of the frequency dependence of the storage and loss moduli for the two systems shows further differences in behavior: while the more long-lived cross-links occur for the more highly charged hydrophilic polymer, the number of cross-links is higher for the hydrophobically modified polymer. Microstructure studies by cryogenic transmission electron microscopy indicate that the two polymers affect the vesicle stability in different ways. With the hydrophobically modified polymer, the aggregates remain largely in the form of globular vesicles and faceted vesicles (polygon-shaped vesicles with largely planar regions). For the hydrophilic polycation, on the other hand, the surfactant aggregate structure is more extensively modified: first, the vesicles change from a globular to a faceted shape; second, there is opening of the bilayers leading to holey vesicles and ultimately to considerable vesicle disruption leading to planar bilayer, disklike aggregates. The faceted shape is tentatively attributed to a crystallization of the surfactant film in the vesicles. It is inferred that a hydrophobically modified polyion with relatively low charge density can better stabilize vesicles due to formation of molecularly mixed aggregates, while a hydrophilic polyion with relatively high charge density associates so strongly to the surfactant films, due to strong electrostatic interactions, that the vesicles are more perturbed and even disrupted

A CASE OF HYPOGLYCEMIA…

Introdução: O hipopituitarismo é caracterizado por insuficiência da secreção hormonal hipófisária. A clínica é variável e depende da etiologia, evolução temporal e hormonas envolvi- das. Caso: Criança do sexo masculino com 2 anos, trazida à urgência por alteração súbita da consciência. No período neonatal apresentou quadro de hipoglicemia, trombocitopenia, icterícia e sépsis sem agente identificado. Objetivou-se crescimento regular no P10-25, desenvolvimento psicomotor adequado e estrabismo divergente. Ao exame objectivo apresentava-se subfebril e com Escala de Coma de Glasgow 10. Foi constatada hipoglicemia grave (26mg/dL) sendo realizado de imediato estudo endocrinológico e metabólico que mostrou cortisol baixo e défices de ACTH e GH; posteriormente foi confirmado défice de TSH. Iniciou terapêutica de substituição com hidrocortisona e levotiroxina. A neuroimagem mostrou alterações estruturais com hipoplasia da neuro-hipófise. Conclusão: Este diagnóstico raro exige elevado grau de suspeição. A ocorrência progressiva dos défices hormonais obriga à avaliação clínica e laboratorial regular

Spontaneous Monochorionic Quadramniotic Pregnancy: A Rare and Challenging Diagnosis

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Systematic reviews and meta-analysis published in indexed Portuguese medical journals: time trends and critical appraisal

© The Author(s) 2022. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativeco mmons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.Introduction: Over the last years, the number of systematic reviews published is steadily increasing due to the global interest in this type of evidence synthesis. However, little is known about the characteristics of this research published in Portuguese medical journals. This study aims to evaluate the publication trends and overall quality of these systematic reviews. Material and methods: This was a methodological study. We aimed the most visible Portuguese medical journals indexed in MEDLINE. Systematic reviews were identified through an electronic search (through PUBMED). We included systematic reviews published up to August 2020. Systematic reviews selection and data extraction were done independently by three authors. The overall quality critical appraisal using the A MeaSurement Tool to Assess systematic Reviews (AMSTAR-2) was independently assessed by three authors. Disagreements were solved by consensus. Results: Sixty-six systematic reviews published in 5 Portuguese medical journals were included. Most (n = 53; 80.3%) were systematic reviews without meta-analysis. Up to 2010 there was a steady increase in the number of systematic reviews published, followed by a period of great variability of publication, ranging from 1 to 10 in a given year. According to the systematic reviews' typology, most have been predominantly conducted to assess the effectiveness/efficacy of health interventions (n = 27; 40.9%). General and Internal Medicine (n = 20; 30.3%) was the most addressed field. Most systematic reviews (n = 46; 69.7%) were rated as being of "critically low-quality". Conclusions: There were consistent flaws in the methodological quality report of the systematic reviews included, particularly in establishing a prior protocol and not assessing the potential impact of the risk of bias on the results. Through the years, the number of systematic reviews published increased, yet their quality is suboptimal. There is a need to improve the reporting of systematic reviews in Portuguese medical journals, which can be achieved by better adherence to quality checklists/tools.info:eu-repo/semantics/publishedVersio

O índice de massa corporal e o conhecimento nutricional de atletas universitários masculinos de Futebol e Futsal

O objetivo deste estudo de corte transversal, quantitativo e descritivo, foi verificar o índice de massa corporal e o conhecimento nutricional de atletas universitários masculinos de futebol e futsal. Participaram 46 atletas universitários com idade entre 18 e 32 anos, todos do sexo masculino, sendo que 16 são atletas do futebol e 30 do futsal, e atuam nas equipes da Universidade Federal do Rio Grande do Sul. A massa corporal total foi mensurada através de balança antropométrica (marca Filizola Mecânica, capacidade de 150 kg). O índice de massa corporal (IMC) foi calculado a partir da fórmula peso/altura², seguindo a classificação da Organização Mundial da Saúde – OMS. Já para mensurar o conhecimento nutricional, foi usada a escala de conhecimento nutricional, adaptada e traduzida por Scagliusi e colaboradores (2006), com referência na escala utilizada pelo National Health Interview Survey Cancer Epidemiology. Após a aplicação dos questionários e aferição da massa corporal e estatura, os dados foram tabulados no programa Microsoft Excel 2013, e foi realizada a estatística descritiva para se obter a média, o desvio padrão e alguns percentuais. Os resultados encontrados demonstraram que os atletas universitários de futsal e futebol apresentaram em geral um nível de conhecimento nutricional moderado e um IMC de classificação eutrófica. Uma intervenção nutricional e consequente maior nível de conhecimento nutricional por parte dos atletas, podem ser fatores determinantes para um melhor condicionamento físico e para a melhora do desempenho dos atletas universitários. ABSTRACT Body Mass Index and the nutritional knowledg of male football and indoor football college athletesThe purpose of this quantitative, descriptive cross-sectional study, was to determine body mass index and nutritional knowledge of football and indoor football male college players. A total of 46 college athletes took part of the study, aged between 18 and 32 years old, all male, being 16 football athletes and 30 indoor football athletes. The subjects came from the Federal University of Rio Grande do Sul teams. Total body mass was measured by using an anthropometric scale (Filizola Mechanics, capacity 150 kg) and body mass index (BMI) was calculated from the formula weight/height2, according to the World Health Organization classification - WHO. As for measuring the nutritional knowledge, a nutritional knowledge grade was applied, adapted and translated by Scagliusi and colleagues (2006), with reference to the one used by the National Health Interview Survey Cancer Epidemiology. The available data, obtained from the grades and measurements, was then tabulated in a Microsoft Excel 2013 worksheet, and descriptive statistics were performed to generate the mean, standard deviation and some percentages. The results showed that the subjects, in general, presented a moderate level of nutritional knowledge and a BMI of eutrophic classification. A nutritional intervention, with consequent higher level of nutritional knowledge among athletes, could be a determining factor for better fitness and performance of college athletes

A satisfação e qualidade do evento Triatlo de São Martinho do Porto 2023

El objetivo de este estudio fue analizar la satisfacción y la calidad de la prueba de triatlón São Martinho do Porto 2023, teniendo en cuenta las percepciones de los participantes. Respondieron a un cuestionario 208 participantes, con edades entre los 14-65 años (media, M= 41.29; desviación típica, DT= 11.28), de los cuales el 71% eran hombres. En la dimensión Calidad Percibida, la puntuación otorgada por los participantes fue de 4,09 (DT= 0.59), en la dimensión Calidad General del Servicio fue de 4.13 (DT= 0.74), en Satisfacción General de 4.37 (DT= 0.66), en la dimensión Valor del Servicio fue de 4.10 (DT= 0.78) y en la dimensión Intenciones Futuras fue de 4.46 (DT= 0.63), lo que corresponde a una puntuación alta en todas las dimensiones. Estos datos indican que los participantes se mostraron satisfechos con el mismo y lo consideraron de alta calidadThe aim of this study was to analyze the satisfaction and quality of the São Martinho do Porto 2023 Triathlon event, considering the participants' perceptions. A total of 208 participants answered an online questionnaire, aged between 14 and 65 (mean, M= 41.29; standard deviation, SD= 11.28), 71% of whom were male. In the Perceived Quality dimension, the score given by the participants was 4.09 (SD= 0.59), in the General Quality of Service dimension it was 4.13 (SD= 0.74), in General Satisfaction 4.37 (SD= 0.66), in the Value of Service dimension it was 4.10 (SD= 0.78) and in the Future Intentions dimension 4.46 (SD= 0.63), which corresponds to a high score in all dimensions. These data indicate that the event participants were satisfied with the event and considered it to be of high qualityO objetivo deste estudo foi analisar a satisfação e qualidade do evento Triatlo de São Martinho do Porto 2023, considerando as perceções dos participantes. Responderam a um questionário online 208 participantes, com idades compreendidas entreos 14 e os 65 (média, M= 41.29; desvio padrão, DP= 11.28), dos quais 71% eram do sexo masculino. Na dimensão Qualidade Percebida, a pontuação atribuída pelos participantes foi de 4.09 (DP= 0.59), na dimensão de Qualidade Geral do Serviço foi de 4.13 (DP = 0.74), na Satisfação Geral 4.37 (DP= 0.66), na dimensão do Valor do Serviço foi de 4.10 (DP= 0.78) e na dimensão das Intenções Futuras 4.46 foi de (DP= 0.63), o que corresponde a uma avaliação positiva de alta pontuação em todas as dimensões. Estes dados deixam-nos indicações de que os participantes do evento ficaram satisfeitos com o evento e consideraram-no de elevada qualidade

Functional training as a method of athletes training high performance

As competições esportivas vêm exigindo dos atletas de alto rendimento sempre seu melhor condicionamento físico. O Treinamento Funcional, por reproduzir de maneira eficiente os gestos motores do esporte praticado, promover nos atletas uma série de adaptações semelhantes às exigidas durante a prática esportiva e desenvolver de forma integrada as valências físicas e componentes neurológicos, é um método capaz de contribuir com a melhora da aptidão física. O presente estudo tem como objetivos verificar o conhecimento e a utilização do Treinamento Funcional por treinadores em um clube esportivo de Porto Alegre bem como, seus benefícios e resultados apresentados. Constituíram a amostra quatro (04) treinadores de diferentes esportes que trabalham com atletas de alto rendimento do clube. Como instrumento de coleta de dados foi aplicado uma entrevista estruturada composta por seis (06) perguntas. Os resultados indicaram que os treinadores detêm conhecimentos sobre este tipo de treinamento físico, porém, a maioria não utiliza o Treinamento Funcional de maneira intencional, utiliza somente alguns aspectos. Verificou-se que embora a maioria dos treinadores entrevistados não utilize o Treinamento Funcional de maneira regular e sistematizada, destacaram alguns objetivos almejados e resultados obtidos com essa metodologia. Concluiu-se então, que o Treinamento Funcional é pouco utilizado por parte dos treinadores, porém, é reconhecido como método de treinamento físico capaz de proporcionar aos atletas diversos benefícios e a melhora do rendimento esportivo. Verificou-se que os treinadores dão preferência a métodos de treinamento tradicionais ao invés do Treinamento Funcional.Sports competitions have always required high-performance athletes to have their best physical conditioning. Functional Training is a method capable of contributing to the improvement of physical fitness, efficiently reproduces the motor gestures of the sport practiced, promoting in the athletes a series of adaptations similar to those required during sports practice, developing in an integrated way the physical and neurological components. The present study had as objectives to verify the knowledge and use of the Functional Training by coaches in a sports club of Porto Alegre, as well as its benefits and presented results. The sample comprised four (04) coaches from different sports, all working with high-performance athletes from the club. As a data collection instrument, a structured interview with six questions was applied. The results indicated that the trainers have knowledge about this type of physical training, however, most do not use the training intentionally, using only some aspects of the training. It was verified that although most of the interviewed trainers did not use Functional Training in a regular and systematized way, they highlighted some objectives and results obtained with the training. It was concluded that the Functional Training has been little used by the coaches, however, it is recognized as a method of physical training capable of providing athletes with various benefits and improved sports performance. It has been found that coaches give preference to traditional training methods that have been used for a longer time rather than Functional Training

A fibrin coating method of polypropylene meshes enables the adhesion of menstrual blood-derived mesenchymal stromal cells: a new delivery strategy for stem cell-based therapies

Polypropylene (PP) mesh is well-known as a gold standard of all prosthetic materials of choice for the reinforcement of soft tissues in case of hernia, organ prolapse, and urinary incontinence. The adverse effects that follow surgical mesh implantation remain an unmet medical challenge. Herein, it is outlined a new approach to allow viability and adhesion of human menstrual blood-derived mesenchymal stromal cells (MenSCs) on PP surgical meshes. A multilayered fibrin coating, based on fibrinogen and thrombin from a commercial fibrin sealant, was optimized to guarantee a homogeneous and stratified film on PP mesh. MenSCs were seeded on the optimized fibrin-coated meshes and their adhesion, viability, phenotype, gene expression, and immunomodulatory capacity were fully evaluated. This coating guaranteed MenSC viability, adhesion and did not trigger any change in their stemness and inflammatory profile. Additionally, MenSCs seeded on fibrin-coated meshes significantly decreased CD4+ and CD8+ T cell proliferation, compared to in vitro stimulated lymphocytes (p < 0.0001). Hence, the proposed fibrin coating for PP surgical meshes may allow the local administration of stromal cells and the reduction of the exacerbated inflammatory response following mesh implantation surgery. Reproducible and easy to adapt to other cell types, this method undoubtedly requires a multidisciplinary and translational approach to be improved for future clinical uses.This work was supported by: SANTANDER BANK: “Convenio de colaboración empresarial en actividades de interés general” to F.M.; FUNDAÇÃO PARA A CIÊNCIA E A TECNOLOGIA (FCT): post-doctoral contract CEECIND/01026/2018 to J.M.S.; INSTITUTO DE SALUD CARLOS III (ISCIII): a “PFIS” contract (FI19/00041) to M.Á.P., a “Sara Borrell” grant (CD19/00048) to E.L.; a “Miguel Servet I” grant (MS17/00021), co-funded by the European Social Fund (ESF) “Investing in your future”, and projects CP17/00021 and PI18/0911, co-funded by the European Regional Development Fund (ERDF) “A way to make Europe” to J.G.C.; a “CIBERCV” grant (CB16/11/00494), co-funded by the ERDF to F.M.S.-M; JUNTA DE EXTREMADURA, CONSEJERÍA DE ECONOMÍA, CIENCIA Y AGENDA DIGITAL: project IB20184 (co-funded by ERDF) to E.L. and M.P.; grant GR18199, co-funded by the ERDF, to F.M.S.-M.; contracts TA18054 to I.J. and TA18011 to J.J.L. (cofinanced by FEDER)

Estado nutricional de escolares praticantes de Educação Física

O presente estudo teve por objetivo analisar o estado nutricional de alunos do ensino médio de duas escolas públicas do município de Porto Alegre/RS. Participaram do estudo 190escolares, 93 do sexo masculino e 97 do sexo feminino, sendo a média de idade dos sujeitos de 16 anos. As coletas foram realizadas durante as aulas de educação física. Foram verificados massa corporal em quilos e estatura em centímetros, para posterior cálculo de Ãndice de Massa Corporal (IMC). Os resultados foram analisados a partir de um cálculo diagnóstico, seguindo as tabelas de referência da Organização Mundial da Saúde (OMS, 2007). Para a comparação entre os sexos foram realizados os testes estatísticos Qui-quadrado e Test U de Mann Whitney no programa SPSS. 20.0. Os resultados identificaram que tanto os meninos quanto as meninas apresentaram, em sua maioria, o índice de massa corporal classificado como eutrófico. No entanto o percentual de sobrepeso e obesidade foi considerável (18% no sexo masculino e 20% no sexo feminino). Não houve diferença estatisticamente significativa entre os sexos. Assim sendo, os resultados obtidos na pesquisa permitiram concluir que o estado nutricional dos escolares apresentou um percentual preocupante de sobrepeso e obesidade, totalizando 20% da amostra geral. ABSTRACT Nutritional Status of School children practitioners of Physical EducationThe present study had the objective e to analyze and classify the nutritional status of high school students from two public schools in the city of Porto Alegre/RS. The study was attended by 190 children, 93 males and 97 females, with 16 years old as average age. Data was collected during their Physical Education classes. Body mass in kilograms and height in meters were verified, for later calculation of Body Mass Index (BMI). The results were analyzed from a diagnostic calculation, following the reference tables (WHO, 1998). To compare the BMI classifications between the sexes, Qui-square test and Mann Whitney U Test were performed, in the SPSS 20.0 software. The results identified that both boys and girls presented, in the majority, the body mass index classified as eutrophic. However, the percentage of overweight and obesity was considerable (18% in males and 20% in females). There was no statistically significant difference between the sexes and the age groups. The results obtained in the research allowed us to conclude that the nutritional status of most students presented a worrying percentage of overweight and obesity, totaling 20% of the general sample