Comparative analysis between themaxent and the weighted least square shape functions in acollocation meshless method

En el presente artículo se analiza el comportamiento de la función de forma basada en el principio de máxima entropía (maxent), en el contexto de un método sin malla con un esquema de colocación, comparando su resultado con la función de forma tradicional basada en mínimos cuadrados ponderados fijos (FWLS). La función de forma maxent considerada en el presente trabajo posee ciertas propiedades deseables para formulaciones sin malla basadas en un esquema de colocación, como lo son su positividad, suavidad y aspecto uniforme, para distintos tipos de discretizaciones. Además, en los contornos, la aproximación no depende de las funciones de forma de los nodos interiores del dominio, propiedad que se conoce como reducción de la función de forma sobre el contorno. Para comparar este tipo de funciones se han desarrollado ejemplos que incluyen la resolución de ecuaciones elípticas de segundo orden, en 1D y 2D. Los resultados numéricos muestran un mejor comportamiento de la función de forma maxent en comparación con la de FWLS, en particular en cuanto a la convergencia y estabilidad del método sin malla de colocación resultante.In this article the behavior of a shape function based on the maximum entropy principle (maxent) is analyzed in a meshless collocation method, compared with a traditional fixed weighted least square shape function (FWLS). The maxent shape function used in this work has certain properties that are desired in a meshless collocation method, for example the positivity, the smooth and uniform aspect for different discretizations. Further, in the boundary, the approximation not depends of the shape function of the interior nodes, this property is know as a reduction of the shape function on the boundary. To compare this type of function, it was developed examples that include the solution of eliptical second order equations in 1D and 2D. The numerical results shown a better behavior of the maxent shape function compared with the FWLS, particularly in terms of the convergence and stability of the meshless collocations method that result.Peer Reviewe

Performance evaluation of Attribute-Based Encryption on constrained IoT devices

The Internet of Things (IoT) is enabling a new generation of innovative services based on the seamless integration of smart objects into information systems. This raises new security and privacy challenges that require novel cryptographic methods. Attribute-Based Encryption (ABE) is a type of public-key encryption that enforces a fine-grained access control on encrypted data based on flexible access policies. The feasibility of ABE adoption in fully-fledged computing systems, i.e., smartphones or embedded systems, has been demonstrated in recent works. In this paper, we consider IoT devices characterized by strong limitations in terms of computing, storage, and power. Specifically, we assess the performance of ABE in typical IoT constrained devices. We evaluate the performance of three representative ABE schemes configured considering the worst-case scenario on two popular IoT platforms, namely ESP32 and RE-Mote. Our results show that, if we assume to employ up to 10 attributes in ciphertexts and to leverage hardware cryptographic acceleration, then ABE can indeed be adopted on devices with very limited memory and computing power, while obtaining a satisfactory battery lifetime. In our experiments, as also performed in other works in the literature, we consider only the worst-case configuration, which, however, might not be completely representative of the real working conditions of sensors employing ABE. For this reason, we complete our evaluation by proposing a novel benchmark method that we used to complement the experiments by evaluating the average performance. We show that by always considering the worst case, the current literature significantly overestimates the processing time and the energy consumption

Blood management in fast-track orthopedic surgery: An evidence-based narrative review

Background and purpose: Innovations able to maintain patient safety while reducing the amount of transfusion add value to orthopedic procedures. Opportunities for improvement arise especially in elective procedures, as long as room for planning is available. Although many strategies have been proposed, there is no consensus about the most successful combination. The purpose of this investigation is to identify information to support blood management strategies in fast-track total joint arthroplasty (TJA) pathway, to (i) support clinical decision making according to current evidence and best practices, and (ii) identify critical issues which need further research. Methods and materials: We identified conventional blood management strategies in elective orthopedic procedures. We performed an electronic search about blood management strategies in fast-track TJA. We designed tables to match every step of the former with the latter. We submitted the findings to clinicians who operate using fast-track surgery protocols in TJA at our research hospital. Results: Preoperative anemia detection and treatment, blood anticoagulants/aggregants consumption, transfusion trigger, anesthetic technique, local infiltration analgesia, drainage clamping and removals, and postoperative multimodal thromboprophylaxis are the factors which can add best value to a fast-track pathway, since they provide significant room for planning and prediction. Conclusion: The difference between conventional and fast-track pathways does not lie in the contents of blood management, which are related to surgeons/surgeries, materials used and patients, but in the way these contents are integrated into each other, since elective orthopedic procedures offer significant room for planning. Further studies are needed to identify optimal regimens

Hipermemo: a hipermídia e a memória no mundo digital

Esse artigo aborda as atuais questões das convergências da hipermídia com a memória, a narratividade oral, as histórias de vida e o patrimônio cultural local. Tem-se por objetivo mostrar como o sistema HiperMemo: Acervo Hipermídia de Memórias representa o elemento de convergência entre as novas tecnologias digitais (a linguagem hipermídia), a memória e o patrimônio cultural

Dynamical quenching and annealing in self-organization multiagent models

We study the dynamics of a generalized Minority Game (GMG) and of the Bar Attendance Model (BAM) in which a number of agents self-organize to match an attendance that is fixed externally as a control parameter. We compare the usual dynamics used for the Minority Game with one for the BAM that makes a better use of the available information. We study the asymptotic states reached in both frameworks. We show that states that can be assimilated to either thermodynamic equilibrium or quenched configurations can appear in both models, but with different settings. We discuss the relevance of the parameter $G$ that measures the value of the prize for winning in units of the fine for losing. We also provide an annealing protocol by which the quenched configurations of the GMG can progressively be modified to reach an asymptotic equlibrium state that coincides with the one obtained with the BAM.Comment: around 20 pages, 10 figure

Avaliação de genótipos de milheto para silagem no semiárido.

Objetivou-se com esta pesquisa avaliar o rendimento forrageiro, as características agronômicas e morfométricas das plantas e as perdas, perfil fermentativo e composição bromatológica de silagens de genótipos de milheto. Para avaliação das características agronômicas e morfométricas dos genótipos utilizou-se o delineamento experimental em blocos casualizados, com cinco repetições. Na fase de avaliação dos silos experimentais o delineamento passou a ser inteiramente casualizado, com quatro repetições. Foram testados os cultivares Sauna B, CMS 01, ADR 500, BRS 1501 e CMS 03. Não houve diferença para a PMV, PMS e MS. Os genótipos de milheto apresentaram uma média de PMV de 9.073 kg/ha no primeiro ciclo e de 10.054kg/ha na rebrota. Quanto à lâmina foliar e a produção de colmo não houve iferença em ambos os cortes. Os teores médios de AL variaram de 1,98 a 5,17%, para os genótipos SAUNA B e CMS 01, respectivamente. Para os teores de PB verificou-se efeito significativo entre os genótipos estudados, com valores variando de 11,56 a 7,90%. Os genótipos estudados se equivaleram tanto na avaliação das plantas como na avaliação das silagens, podendo ser utilizados como uma alternativa forrageira em regiões semiáridas

The participation of Wajapi women from the State of Amapa (Brazil) in the traditional use of medicinal plants - a case study

Background: the purpose of this study was to analyze the importance of traditional medicinal plants use to Wajapi women in the State of Amapa, Brazil, as well as their practices in the local common illnesses of treatment considering the prevailing practice by non-Indians.Methods: This study was conducted in the Community of the Wajapi Indigenous People, a Brazilian territory located in the central western State of Amapa. Wajapi women were selected for the interview since they have the responsibility to harvest, collect and prepare the preparations. the studied women were residents of four villages. the number of women within these four villages is 24.Results and conclusions: the findings fell into the following three categories: 1) the daily use of medicinal plants by women and main methods of application. in this category, the botanical families found included Leguminosae-Caesalpinoideae, Anacardiaceae, Meliaceae, and Rubiaceae. the main forms of use found were teas, baths, maceration, in natura, and juices; 2) Through analysis of illness and treatment records, a lack of knowledge integration in the health system was shown to be due to a variety of gaps and the need of health professionals to be more aware about the local culture which they intend to work with, what could decrease the prevailing barriers between the social groups involved; 3) Traditional knowledge and possible sustainability can be fostered by stimulating the transmission of traditional knowledge from generation to generation, therefore reducing the dependence on industrialized medicines and also by maintaining an appreciation of those practices among youngsters, who tend to question them.Univ Fed Amapa, Curso Enfermagem, Ctr Ciencias Biol & Saude, BR-68902280 Macapa, Amapa, BrazilUniv Fed Amapa, Lab Estudos Sociais, BR-68902280 Macapa, Amapa, BrazilUniversidade Federal de São Paulo Unifesp, DCET, Setor Ciencias Farmaceut, BR-09972270 Diadema, SP, BrazilUniv Fed Amapa, Lab Pesquisa Farm, Ctr Ciencias Biol & Saude, BR-68902280 Macapa, Amapa, BrazilUniversidade Federal de São Paulo Unifesp, DCET, Setor Ciencias Farmaceut, BR-09972270 Diadema, SP, BrazilWeb of Scienc

COVID-19: not a contraindication for surgery in patients with proximal femur fragility fractures.

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Invariance of the trait emotional intelligence construct across populations and sociodemographic variables

Cultural, linguistic and sociodemographic peculiarities may influence trait Emotional Intelligence (trait EI). An instrument capable of assessing trait EI in different populations can foster cross-cultural research and make an important contribution to the construct's nomological network. Accordingly, the present study aimed to examine the relationship between trait EI and key sociodemographic variables through univariate analyses of variance and tests of multigroup measurement equivalence. We used datasets Trait Emotional Intelligence Questionnaire (TEIQue-SF) datasets from four countries. Collectively, these datasets comprised 2228 participants, 23% from Brazil, 15% from Chile, 23% from Italy, and 39% from the United Kingdom. The sociodemographic variables that we used for trait EI comparisons were gender, age, educational level, civil and occupational status. Our results indicated significant global trait EI differences across countries for civil status, occupation, educational attainment, and age. Measurement invariance across the datasets was acceptable, especially for age, gender and education. In conclusion, the present psychometric evidence supports the suitability of the TEIQue-SF for the accurate assessment of trait EI in transcultural research