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"Da Silva, Pedro"
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Efeitos de 12 semanas de treinamento de paracanoagem no comprimento, frequência e índice de remada em atletas iniciantes
by
Jeferson Carvalho Coelho de Gois
,
Pedro André da Silva Lins
,
Iaraildo Pereira de Carvalho
in
Cameras
,
Canoagem
,
Canoes & canoeing
2024
A presente pesquisa teve como objetivo analisar os efeitos de 12 semanas de treinamento de paracanoagem no comprimento, frequência e índice de remada. Caracterizando-se por uma pesquisa quantitativa e delineamento quase-experimental. A amostra foi composta por 5 atletas, com idade entre 28 e 43 anos, de paracanoagem, de ambos os sexos e residentes no sertão de Pernambuco. A coleta de dados foi realizada em um lago artificial situado na cidade de Petrolina – PE, que ocorreu em dois momentos sendo pré e pós teste, utilizando caiaque (K1 paracanoagem) e remo (Epic® e Jantex®) com uma câmera de vídeo de ação (GoPro 7 Hero Black®) acoplada na proa da embarcação. Posteriormente, foi utilizado um programa de telemetria (Telemetry Overlay®) para extrair os dados da câmera de vídeo de ação, e o Kinovea® para analisar os dados do vídeo. As variáveis de tempo(d=0,68),comprimento de remada (d=0,51) , frequência da remada( d=0,52) e índice de remada (d=0,58) apresentaram tamanho do efeito moderado quando comparadas no pré e pós teste. O presente estudo demonstrou que 12 semanas de treinamento apresentou maior efeito no desempenho com relação as variáveis de índice de remada e tempo de prova na paracanoagem com percurso de 200 metros.
The present research aimed to analyse the effects of 12 weeks of paracanoe training on stroke length, stroke frequency, and stroke index. It is characterised by quantitative research and quasi-experimental design. The sample comprised 5 paracanoe athletes, aged between 28 and 43, of both sexes and living in the backlands of Pernambuco. Data collection was carried out in an artificial lake located in the city of Petrolina – PE, which occurred in two moments, pre and post-test, using a kayak (K1 paracanoagem) and rowing (Epic® and Jantex®) with an action camera (GoPro 7 Hero Black®) attached to the bow of the vessel. Subsequently, a telemetry program (Telemetry Overlay®) was used to extract data from the action video camera, and Kinovea® was used to analyze the video data. The variables of time (d=0.68), stroke length (d=0.51), stroke frequency (d=0.52) and stroke index (d=0.58) showed a moderate effect size when compared in the pre and post-test. The present study demonstrated that 12 weeks of training had a greater effect on performance in relation to the variables of paddling rate and race time in paracanoe with a 200-meter route.
Journal Article
Disentangling the correlates of species and site contributions to beta diversity in dung beetle assemblages
by
Heino, Jani
,
Hernández, Malva Isabel Medina
,
da Silva, Pedro Giovâni
in
Abundance
,
Beetles
,
Biodiversity
2018
Aim We aimed to test whether contributions of individual species (SCBD) and contributions of single sites (LCBD) to overall beta diversity can be predicted by species metrics and species characteristics and also by community metrics and ecological variables, respectively. Location A mainland‐island landscape in the southern Brazilian Atlantic Forest domain. Methods Dung beetles were sampled along 100 sampling units within four large forest fragments. We partitioned beta diversity into SCBD and LCBD aiming to explore their relationships to species and site characteristics, respectively. We then used a combination of multivariate methods and beta regression analyses to examine patterns in SCBD and LCBD. The occupancy, total abundance, niche position, niche breadth and biological traits of species were used as predictor variables for SCBD values. Community metrics, environmental and spatial variables, and temporal patterns in the beta diversity components of turnover and nestedness were used as predictor variables for LCDB values. Results We found that SCBD was strongly related to various species characteristics, such as occupancy, abundance and niche position, but was not related to biological traits of species and niche breadth. In particular, occupancy and its quadratic term showed a very strong unimodal relationship with SCBD, suggesting that intermediate species in terms of site occupancy contribute most to beta diversity. LCBD was mostly explained by variation in species richness, with a negative relationship being detected. Litter height and large‐scale spatial variables were also important in explaining variation in LCBD. Main conclusions SCBD and LCBD were highly predictably related to species occupancy and species richness, respectively. Environmental conditions and large‐scale spatial variables also correlated with LCBD values. Understanding the determinants of SCBD and LCBD may thus hold a key to various general ecological, bioassessment and conservation issues. Protecting sites with high LCBD values may be a suitable approach to practical biodiversity conservation.
Journal Article
Spatial Patterns of Movement of Dung Beetle Species in a Tropical Forest Suggest a New Trap Spacing for Dung Beetle Biodiversity Studies
2015
A primary goal of community ecologists is to understand the processes underlying the spatiotemporal patterns of species distribution. Understanding the dispersal process is of great interest in ecology because it is related to several mechanisms driving community structure. We investigated the mobility of dung beetles using mark-release-recapture technique, and tested the usefulness of the current recommendation for interaction distance between baited pitfall traps in the Brazilian Atlantic Forest. We found differences in mean movement rate between Scarabaeinae species, and between species with different sets of ecological traits. Large-diurnal-tunneler species showed greater mobility than did both large-nocturnal tunneler and roller species. Our results suggest that, based on the analyses of the whole community or the species with the highest number of recaptured individuals, the minimum distance of 50 m between pairs of baited pitfall traps proposed roughly 10 years ago is inadequate. Dung beetle species with different sets of ecological traits may differ in their dispersal ability, so we suggest a new minimum distance of 100 m between pairs of traps to minimize interference between baited pitfall traps for sampling copronecrophagous Scarabaeinae dung beetles.
Journal Article
Co‐declining mammal–dung beetle faunas throughout the Atlantic Forest biome of South America
by
Peres, Carlos A.
,
Bogoni, Juliano André
,
da Silva, Pedro Giovâni
in
Assembly
,
Beetles
,
Biodiversity
2019
The millennial–scale evolutionary relationships between mammals and dung beetles have been eroded due to several drivers of contemporary biodiversity loss. Although some evidence of co‐decline has been shown for mammals and dung beetles at some Neotropical sites, a biome‐scale analysis for the entire Atlantic Forest of South America would strengthen our understanding of how relictual sets of mammal species can affect dung beetle co‐occurrences and co‐declines. We therefore collated hundreds of assemblages of both dung beetles and medium‐ to large‐bodied mammals throughout the world's longest tropical forest latitudinal gradient to examine to what extent mammal assemblages may exert a positive influence on dung beetle species composition and functional assembly, and whether this relationship is scale dependent. We also collated several climatic and other environmental variables to examine the degree to which they shape mammal–dung beetle relationships. The relationships between local mammal and dung beetle faunas were examined using regression models, variation partitioning, dissimilarity indices and ecological networks. We found a clear positive relationship between mammal and dung beetle species richness across this forest biome, indicating an ongoing process of mammal–dung beetle niche‐mediated co‐decline. We found a strong relationship between the species composition of both taxa, in which dung beetle species dissimilarity apparently track changes in mammalian dissimilarity, typically in 80% of all cases. Co‐variables such as phytomass and climatic variables also influenced mammal–dung beetle patterns of co‐decline along the Atlantic Forest. We conclude that dung beetle diversity and community assembly are shaped by the remaining co‐occurring mammal assemblages and their functional traits, and both groups were governed by environmental features. We emphasize that ecosystem‐wide effects of mammal population declines remain poorly understood both quantitatively and qualitatively, and curbing large vertebrate defaunation will ensure the persistence of co‐dependent species.
Journal Article
Não fui eu que escrevi isso: percursos metaficcionais na obra de Julián Fuks
2023
O presente artigo analisa a produção ficcional de Julián Fuks sob a perspectiva da metaficção, situando seu fazer literário no amplo espectro de possibilidades estéticas oferecidas pela contemporaneidade literária e, posteriormente, ao inseri-lo no contexto da ficção pós-modernista, destacando alguns dos principais procedimentos metaficcionais de seus romances.
Journal Article
Predictors of Patient Satisfaction and the Perceived Quality of Healthcare in an Emergency Department in Portugal
by
Alcantara da Silva, Pedro
,
Moreira, Sergio
,
Abidova, Alina
in
Adult
,
Emergency Department Administration
,
Emergency medical care
2020
Introduction: The predictors of patient satisfaction in emergency medicine (EM) have been widely studied and discussed in the scientific literature; the results vary depending on the specific EM attributes, cultural aspects, researchers’ preferences, and approaches. However, it is not clear whether the same predictors of patient satisfaction can contribute to a better-perceived quality of healthcare or whether patients’ perceptions form a different attitude toward satisfaction and perceived quality of healthcare. The goal of this study was to identify the key predictors of patient satisfaction and perceived quality of healthcare in the framework of an emergency department (ED). Methods: We conducted a retrospective study of patients seen at an ED between January -December 2016. Data collection took place in the public hospital in Lisbon, Portugal, between May - November 2017. The total sample size included 382 patients. The sample distribution had a 5% margin of error and a 95% confidence interval. Data for this research, using a questionnaire, was collected by mail or e-mail according to the respondent’s preference. Results: A detailed analysis showed that three out of the 18 predictors had a statistically significant relationship with satisfaction: overall satisfaction with doctors, with a positive correlation (r = 0.14, p ≤ 0.01); qualitative perceived waiting time for triage, with a positive correlation (r = 0.08, p ≤ 0.05); and meeting expectations, with a positive correlation (r = 0.53, p ≤ 0.01). Furthermore, a detailed analysis showed that only two out of the 18 predictors had a statistically significant relationship with the perceived quality of healthcare (PQHC): overall satisfaction with doctors, with a positive correlation (r = 0.43, p ≤ 0.01) and meeting expectations, with a positive correlation (r = 0.26, p ≤ 0.01). Conclusion: The main predictors of satisfaction and perceived quality of healthcare were overall satisfaction with doctors and meeting expectations. We should note that “meeting expectations” plays the most important role in terms of satisfaction; however, in terms of PQHC the predictor “overall satisfaction with doctors” plays the most important role due to its stronger correlation. In addition, the qualitative perceived waiting time for triage could be considered as another predictor, influencing satisfaction only, thus emphasizing similarities and differences between satisfaction and the PQHC in an ED context.
Journal Article
Influência da folga financeira no desempenho econômico de empresas industriais brasileiras e mexicanas
by
Da Silva, Tarc´´isio Pedro
,
Pamplona, Edgar
,
Toshiro-Nakamura, Wilson
in
desempenho econômico
,
Economic conditions
,
empresas industriais
2019
Este estudo objetiva verificar a influência da folga financeira no desempenho econômico de empresas industriais brasileiras e mexicanas. Realizou-se pesquisa descritiva, documental e quantitativa, com amostra de 152 empresas, sendo 107 brasileiras e 45 mexicanas, investigadas entre 1996 e 2014. Os resultados encontrados através de regressões lineares direcionam que a folga proporciona melhora (relação positiva) na performance corporativa. Todavia, as regressões quadráticas apontam, em ambos os contextos estudados, com poder explicativo superior, que a relação entre folga e desempenho é não linear. Tal fato confirma que há um ponto ótimo de folga financeira que maximiza os resultados corporativos, sendo diferente para empresas brasileiras e mexicanas. Tais achados devem ser observados por gestores visando a melhor gestão dos recursos disponíveis nas organizações.
Journal Article
Influência da estrutura de capital no desempenho de empresas brasileiras sob a ótica não linear
by
Pamplona, Edgar
,
Da Silva, Tarcísio Pedro
in
Capital structure
,
desempenho econômico
,
estrutura de capital
2020
Objetivou-se verificar a influência da estrutura de capital no desempenho econômico de empresas industriais brasileiras sob a ótica não linear. A amostra abrangeu 232 organizações listadas na Brasil, Bolsa, Balcão (B3), com dados de 1996 a 2017. As informações foram tratadas a partir de técnicas estatísticas, com destaque para a regressão quadrática. Os achados apontam que o nível ideal de endividamento para maximizar o Retorno sobre o Patrimônio Líquido (ROE) é de 35,78%, enquanto para impulsionar o Retorno sobre Ativos (ROA) é de 45,81%. Tais resultados enquadram-se nos preceitos da teoria trade-off. Conclui-se que: 1) modelos lineares podem levar a conclusões equivocadas acerca do fenômeno observado; e, 2) gestores corporativos devem observar de maneira particular a estrutura de capital para maximizar o desempenho corporativo conforme o prisma desejado: ROE ou ROA.
Journal Article
An emergency system for monitoring pulse oximetry, peak expiratory flow, and body temperature of patients with COVID-19 at home: Development and preliminary application
by
Borguezan, Bruno Max
,
Melo, Pedro Lopes de
,
Milagres, Lucimar Gonçalves
in
Adult
,
Analysis
,
Asthma
2021
COVID-19 is characterized by a rapid change in the patient's condition, with major changes occurring over a few days. We aimed to develop and evaluate an emergency system for monitoring patients with COVID-19, which may be useful in hospitals where more severe patients stay in their homes.
The system consists of the home-based patient unit, which is set up around the patient and the hospital unit, which enables the medical staff to telemonitor the patient's condition and help to send medical recommendations. The home unit allows the data transmission from the patient to the hospital, which is performed using a cell phone application. The hospital unit includes a virtual instrument developed in LabVIEW® environment that can provide a real-time monitoring of the oxygen saturation (SpO2), beats per minute (BPM), body temperature (BT), and peak expiratory flow (PEF). Abnormal events may be fast and automatically identified. After the design details are described, the system is validated by a 30-day home monitoring study in 12 controls and 12 patients with COVID-19 presenting asymptomatic to mild disease. Patients presented reduced SpO2 (p<0.0001) and increased BPM values (p<0.0001). Three patients (25%) presented PEF values between 50 and 80% of the predicted. Three of the 12 monitored patients presented events of desaturation (SpO2<92%). The experimental results were in close agreement with the involved pathophysiology, providing clear evidence that the proposed system can be a useful tool for the remote monitoring of patients with COVID-19.
An emergency system for home monitoring of patients with COVID-19 was developed in the current study. The proposed system allowed us to quickly respond to early abnormalities in these patients. This system may contribute to conserving hospital resources for those most in need while simultaneously enabling early recognition of patients under acute deterioration, requiring urgent assessment.
Journal Article
Comparative Analysis of Passive Thermal Solutions for Building Resilience Under Future Climate Scenarios
by
Pires, Luís Carvalho
,
Silva, Pedro Dinho da
,
Teixeira, José Pedro
in
building energy performance
,
Climate adaptation
,
Climate change
2025
The intensification of thermal extremes increases the need for strategies that protect indoor comfort and reduce the energy demand of active systems. This study employs EnergyPlus dynamic simulations to evaluate how passive thermal design solutions for heating and cooling can minimize indoor temperature fluctuations. The analysis covers multiple locations to identify the most effective techniques for improving indoor thermal performance and energy efficiency. Results demonstrate that passive thermal strategies offer a sustainable and efficient approach to adapting buildings to extreme temperature variations, thereby reducing dependence on mechanical systems. The greatest reduction in energy demand is achieved by increasing the envelope’s thermal mass, particularly in hot and temperate climates. Enhanced insulation and green roofs are more effective in cold and humid climates. In addition, solar control measures, such as external shading and reduced glazing areas, help lower indoor temperatures in high-thermal-radiation regions.
Journal Article