Abstract Background Heart Failure is a significant public health problem leading to a high burden of physical and psychological symptoms despite optimized therapy. Objective To evaluate primarily the impact of a Stress Reduction, Meditation, and Mindfulness Program on stress reduction of patients with Heart Failure. Methods A randomized and controlled clinical trial assessed the effect of a stress reduction program compared to conventional multidisciplinary care in two specialized centers in Brazil. The data collection period took place between April and October 2019. Thirty-eight patients were included and allocated to the intervention or control groups. The intervention took place over 8 weeks. The protocol assessed the scales of perceived stress, depression, quality of life, anxiety, mindfulness, quality of sleep, a 6-minute walk test, and biomarkers analyzed by a blinded team, considering a p-value <0.05 statistically significant. Results The intervention resulted in a significant reduction in perceived stress from 22.8 ± 4.3 to 14.3 ± 3.8 points in the perceived stress scale-14 items in the intervention group vs. 23.9 ± 4.3 to 25.8 ± 5.4 in the control group (p-value<0.001). A significant improvement in quality of life (p-value=0.013), mindfulness (p-value=0.041), quality of sleep (p-value<0.001), and the 6-minute walk test (p-value=0.004) was also observed in the group under intervention in comparison with the control. Conclusion The Stress Reduction, Meditation, and Mindfulness Program effectively reduced perceived stress and improved clinical outcomes in patients with chronic Heart Failure.

Resumo Fundamento A Insuficiência Cardíaca é um importante problema de saúde pública, que leva à alta carga de sintomas físicos e psicológicos, apesar da terapia otimizada. Objetivo Avaliar primariamente o impacto de um Programa de Redução de Estresse, Meditação e Atenção plena na redução do estresse de pacientes com Insuficiência Cardíaca. Métodos Ensaio clínico randomizado e controlado que avaliou o impacto de um programa de redução de estresse comparado ao atendimento multidisciplinar convencional, em dois centros especializados no Brasil. O período de coleta de dados ocorreu entre abril e outubro de 2019. Um total de 38 pacientes foram alocados nos grupos de intervenção ou controle. A intervenção aconteceu ao longo de 8 semanas. O protocolo consistiu na avaliação das escalas de estresse percebido, depressão, qualidade de vida, ansiedade, atenção plena, qualidade do sono, teste de 6 minutos de caminhada e biomarcadores por um grupo cego, considerando um p-valor <0,05 como estatisticamente significativo. Resultados A intervenção resultou em redução significativa no estresse percebido de 22,8 ± 4,3 para 14,3 ± 3,8 pontos na escala de estresse percebido no grupo de intervenção vs. 23,9 ± 4,3 para 25,8 ± 5,4 no grupo controle (p-valor<0,001). Foi observada melhora significativa na qualidade de vida (p-valor=0,013), atenção plena (p-valor=0,041), qualidade do sono (p-valor<0,001) e no teste de 6 minutos de caminhada (p-valor=0,004) no grupo sob intervenção comparado com o controle. Conclusão O Programa de Redução de Estresse, Meditação e Atenção plena reduziu efetivamente o estresse percebido e melhorou desfechos clínicos em pacientes com Insuficiência Cardíaca.

Resumo Objetivos A falha do componente glenoidal é a principal causa de revisão da artroplastia total do ombro (ATO) e sua frequência parece ser influenciada pelo design do componente. O objetivo deste estudo foi a avaliação clínica e radiográfica (através de raios X e tomografia computadorizada) dos resultados da ATO com componente glenoidal minimamente cimentado. Métodos O presente trabalho analisou ATOs realizadas com componente glenoidal Anchor Peg (DuPuy Synthes, Warsaw, IN, EUA) minimamente cimentado entre 2008 e 2013. Por um período mínimo de acompanhamento de 24 meses, escores segundo critérios da University of California at Los Angeles (UCLA) e imagens padronizadas de radiografia simples e tomografia computadorizada foram analisadas. A presença de osso entre as aletas do pino do componente central, que é um indicador de sua integração, foi avaliada nas imagens, bem como a presença de linhas radiotransparentes ao redor do componente glenoidal. Resultados Dezenove ombros de 17 pacientes foram avaliados. De acordo com o escore da UCLA, os resultados clínicos foram satisfatórios em 74% dos casos e moderados em 21% dos casos. O resultado foi ruim em um paciente. A integração de componentes foi observada em 58% dos pacientes, sendo total em 42% e parcial em 16% dos casos. Linhas radiotransparentes foram observadas em 52% dos pacientes. Nenhuma relação entre a integração de componentes e os resultados clínicos foi detectada. Conclusão A maioria dos pacientes submetidos à ATO com componente glenoidal minimamente cimentado apresentou resultados clínicos satisfatórios. Linhas radiotransparentes ao redor do componente glenoidal são comuns, mas não interferem nos resultados clínicos Nível de evidência IV; Série de caso; Estudo terapêutico.

Abstract Objectives Glenoid component failure is the main cause of total shoulder arthroplasty (TSA) revision, and component design seems to influence the failure rate. The aim of the present study was to clinically and radiographically (through X-rays and computed tomography scan) evaluate the results of TSA using a minimally cemented glenoid component. Methods Total should arthroplasties performed using the minimally cemented Anchor Peg (DuPuy Synthes, Warsaw, IN, USA) glenoid component between 2008 and 2013 were evaluated. University of California at Los Angeles (UCLA) scores were calculated, and standardized plain film and computed tomography images were obtained, at a minimum follow-up of 24 months. The presence of bone between the fins of the central component peg, which indicates its integration, was assessed on the images, as well the presence of radiolucent lines around the glenoid component. Results Nineteen shoulders in 17 patients were available for evaluation. According to the UCLA score, clinical results were satisfactory in 74% of cases and fair in 21% of cases. One patient had a poor result. Component integration was found in 58% of patients (total in 42% and partial in 16%). Radiolucent lines were observed in 52% of cases. No relationship was detected between component integration and clinical results. Conclusion Satisfactory clinical results were achieved in most patients undergoing TSA using a minimally cemented glenoid component. Radiolucent lines around the glenoid component are common, but do not interfere with the clinical results. Level of evidence IV; Case series; Treatment study.

Resumo Objetivo Osteólise do processo coracoide é descrita como uma possível complicação da cirurgia de Latarjet. O objetivo do presente estudo foi avaliar a incidência e fatores de risco associados à osteólise do enxerto do coracoide e correlacioná-los com resultados clínicos. Métodos Foi realizada uma revisão retrospectiva incluindo 38 casos submetidos ao procedimento de Latarjet. Em todos os casos, foi realizada uma tomografia computadorizada antes e pelo menos 1 ano após a cirurgia. A presença de osteólise do coracoide foi avaliada e correlacionada com os seguintes fatores de risco: idade, tabagismo, e perda óssea pré-operatória da glenóide. Os pacientes foram divididos em dois grupos: A (ausência ou menor reabsorção óssea) e B (maior reabsorção óssea ou total). A avaliação funcional foi determinada através do escore de Rowe. Resultado Osteólise do processo coracoide ocorreu em 22 casos (57,8%). O defeito ósseo médio pré-operatório da glenóide foi de 22,8% no grupo A e de 13,4% no grupo B (p= 0.0075). A média de idade dos casos em ambos os grupos não apresentou diferença estatística. Tabagismo também não esteve relacionado com diferenças no resultado. Não houve correlação entre a presença de osteólise e o arco de movimento, dor ou ao escore de Rowe. Não houve casos de reluxação; entretanto, quatro pacientes apresentaram apreensão anterior no exame físico. Conclusão A reabsorção do processo coracoide ocorreu em pelo menos 50% dos pacientes submetidos à cirurgia de Latarjet, e a ausência pré-operatória de perda óssea significativa da glenóide foi o único fator de risco associado a osteólise mais severa do enxerto, porém sem influência no resultado clínico.

Abstract Objective Coracoid osteolysis has been described as a possible complication after the Latarjet procedure. The aim of the present study was to investigate the incidence and risk factors associated to coracoid graft osteolysis and to correlate them with clinical results. Methods A retrospective review of 38 Latarjet procedures was conducted. Computed tomography (CT) scans were obtained from all of the patients before and at least 1 year after the surgery. Coracoid osteolysis was evaluated and correlated to preoperative factors, namely: age, smoking status, and preoperative glenoid bone loss. The patients were divided into 2 groups: A (no or minor bone resorption) and B (major or total bone resorption). The functional outcome was determined by the Rowe score. Results Coracoid graft osteolysis occurred in 22 cases (57.8%). The mean preoperative glenoid defect was 22.8% in group A, and 13.4% in group B (p= 0.0075). The mean ages of the subjects in both groups were not significantly different. Smoking did not seem to affect the main outcome either, and no correlation was found between graft osteolysis and postoperative range of motion, pain, or Rowe score. There were no cases of recurrent dislocations in our sample, although four patients presented with a positive anterior apprehension sign. Conclusion Bone resorption of the coracoid graft is present in at least 50% of the patients submitted to the Latarjet procedure, and the absence of significant preoperative glenoid bone loss showed to be the only risk factor associated with severe graft osteolysis, even though this did not influence significantly the clinical outcome.

Abstract This paper presents a microstrip phased array using High Impedance Surface - Electromagnetic Bandgap (HIS-EBG) in order to minimize the effects of mutual coupling among the antenna elements. Each element of the array is fed by a coaxial cable allowing the beam steering by controlling the signal of the input port of each element. This phased array operates at X Band as well as the bandgap of the HIS-EBG structure. Its main applications are satellite communication and broadcasting systems. Results show reductions in the mutual coupling up to 12 dB, and improvements in the return loss and gain.

Lithium manganese oxide, LiMn2O4, was synthesized in two temperature stages, where the first consisted by an ecofriendly solution combustion method at 300 °C. Finally, the as-burned powders were thermal treated at 500 and 700 °C. The structural and morphological changes were evaluated by the Rietveld method and density functional theory (DFT) calculations. The Rietveld refinement indicates obtaining the spinel cubic phase LiMn2O4 and a small amount of Mn2O3. The analyses by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) show a porous microstructure composed of nano-sized crystallites for the sample treated at 500 °C. In cyclic voltammetry, it was possible to observe that the reduction-oxidation reaction is reversible due to the shape of voltammograms and the anodic and cathodic peaks of Mn ions. The theoretical calculations considered the experimental crystallographic parameters. The unit cell volume change was evaluated according to distinct amounts of lithium ions in the structure. The removal of the Li+ cations from the oxides promotes a volume contraction. Therefore, it was possible to evaluate the participation of the Mn3+ ions in the frontier region between the valence and conduction bands. The density of states (DOS) calculation shows a predominant contribution of the O 2p and Mn 3d orbitals in the frontier orbitals.

Abstract In the last decade, various works have demonstrated that a class of artificial material called metamaterials (MTM) can synthesize mu-negative (MNG) media capable of evanescent-wave focusing which largely enhances the magnetic coupling between coils, which is the basic mechanism of Inductive Power Transmission (IPT) systems. In the present work, MTM-enhanced coupling in IPT systems is examined through analytical and numerical results, which are validated by experimental data. Adopting a transmission-line (TL) based approach to describe the general MTM-enhanced IPT system, it is evidenced that MNG MTMs can be interpreted as a negative impedance from a circuital point of view.

Density functional theory (DFT) (B3LYP/6-311++G(d,p)) calculations of the interacting strength 1,2-dithiolene anionic ligands with the [M(OH2)4]2+ and [M(OH2)2]2+ complexes (M = Ni and Zn) were performed. Three series of ligands were studied: compounds with an aromatic ring, with an ethylene moiety and with a heterocyclic ring. The ligands have substituents electron donors and acceptors by induction and resonance. Two substitution reactions were studied: the first is the substitution of two water molecules from the [M(OH2)6]2+ by a dithiolene anionic ligand (L2-) and the second is the substitution of two water molecules from the [M(OH2)4L] by another dithiolene anionic ligand. Geometric, electronic and energetic properties of the substituted aquacations are correlated with the metal-ligand affinity. All the substitution processes for both metal cations are spontaneous and are modulated by the electronic effect of each substituent of the ligand. Geometric parameters and chelation angle are correlated with the interaction strength. The energy decomposition analysis (EDA) results show that the electrostatic component is the main stabilizing term for the monosubstituted complexes, while for the disubstituted complexes the covalent term is the main stabilizing component. The polarization term is the main one to describe the covalent character. Natural bond orbital (NBO) shows the acid-base interaction nature of the metal-ligand bond.

RESUMO Os fungicidas químicos fornecem meios primários para o controle da infecção fúngica de frutas e legumes no período pós-colheita. A exploração de produtos naturais para controlar a deterioração e prolongar o tempo de armazenamento de alimentos perecíveis tem recebido mais atenção. Neste trabalho, extratos hidroetanólicos de folhas de saboeiro (Sapindus saponaria L.) foram analisados quanto a sua atividade inibitória contra o fungo Colletotrichum gloeosporioides, agente causador da antracnose em frutos de mamoeiro. Para avaliar a atividade antifúngica do extrato vegetal, este foi incorporado em meio de batata-dextrose-agar (BDA) à diferentes concentrações (10, 50 e 100 mg mL-1), e a inibição do crescimento micelial, inibição de produção de esporos e mudanças morfológicas foram avaliadas à temperatura ambiente após sete dias. A eficácia do extrato foi observada quando foram utilizados 50 mg mL-1 e 100 mg mL-1 do extrato, resultando em redução de crescimento micelial (. <0.05). À 50 mg mL-1, o extrato causa alterações morfológicas com a redução do tamanho das hifas que se tornam mais curtas e mais ramificadas. À 100 mg mL-1 de extrato, os danos na estrutura da hifa foram mais severos, causando ruptura micelial. O tratamento in vivo com 100 mg mL-1 de extrato impediu o desenvolvimento de sintomas de antracnose em frutos de mamão frescos. O extrato de folha de saboeiro tem uma forte atividade inibitória contra C. gloeosporioides, impedindo o crescimento micelial e reduzindo o aparecimento de sintomas de antracnose. Em conjunto, estes resultados demonstraram o seu potencial do extrato como fungicida natural constituindo uma medida alternativa para o controle da doença em frutos de mamoeiro.

ABSTRACT Chemical fungicides provide the primary means to control fungal infection in fruits and vegetables in the postharvest. Exploitation of natural products to control decay and prolong the storage life of perishables has received more attention. In this study, hydroethanolic extracts from the leaves of soapberry (Sapindus saponaria L.) were investigated for their inhibitory activity against the fungus Colletotrichum gloeosporioides, the causal agent of anthracnose in papaya fruits. To evaluate the antifungal activity of the plant extract, the latter was incorporated into potato-dextrose-agar (PDA) medium at different concentrations (10, 50 and 100 mg mL-1), and mycelial growth inhibition, spore production inhibition and morphological changes were evaluated at room temperature after 7 days. Efficacy of the extract was noted when it was used at 50 mg mL-1 and 100 mg mL-1, resulting in a reduction in the mycelial growth (P< 0.05). At 50 mg mL-1, the extract causes morphological changes by reducing the size of hyphae, which become shorter and more branched. At 100 mg mL-1 extract, damages in the hyphal structure were more severe, causing mycelial rupture. In vivo treatment with 100 mg mL-1 extract prevented the development of anthracnose symptoms in fresh papaya fruits. Soapberry leaf extract has strong inhibitory activity against C. gloeosporioides, preventing the mycelial growth and reducing the appearance of anthracnose symptoms. Taken together, these results demonstrated the potential of this extract as a natural fungicide, constituting an alternative measure for disease control in papaya fruits.

Lithium cobalt oxide, LiCoO2, widely used as cathode in lithium ion batteries was synthesized and their structural and electronic properties investigated. The crystalline powders were prepared by the sol-gel method with four complexing agents: citric acid, glycine, starch and gelatin. These syntheses were compared with the blank test (without complexing agent). The X-ray diffraction and vibrational spectroscopy allowed the identification of the rhombohedral phase LiCoO2 (R3m) as the only or principal crystalline component in all samples. A small fraction of a second phase of cubic spinel Co3O4 was observed in the samples of starch, gelatin and the blank test. The Rietveld refinements showed small structural variations, indicating reduced influence of the complexing agents on the synthesis. The theoretical HOMO-LUMO (highest occupied molecular orbital-lowest unoccupied molecular orbital) gap values are in agreement to those estimated by diffuse reflectance spectroscopy (DRS). The scanning electron microscopy (SEM) showed morphological pattern regardless of the complexing agent used, showing an alternative method.

Abstract This paper deals with the effect of the Single-Input Multiple-Output spatial diversity on the OFDM mobile radio signal propagating in an urban channel. From measurements performed in Rio de Janeiro city, Brazil, by using two receiving antennas at diversity, the calculated capacity presented an improvement when compared to the individual one.

Abstract In this work three wideband mobile radio channel sounding methods are simulated and compared using computational tools. The considered sounders include the traditional STDCC and two other proposed sounding methods that are based on OFDM digital transmission and detection procedures and on matched filtering. The impact of the phase noise introduced by the receiver local oscillator in the precision of the examined sounders is analyzed by comparing the estimated channel results with the simulated reference channel. Other impairments factors like thermal noise or nonlinear distortion affecting the system are not considered.

OBJETIVO: apresentar uma análise retrospectiva dos resultados clínico-funcionais e das complicações dos pacientes com artropatia do manguito rotador (AMR) submetidos à artroplastia reversa do ombro.MÉTODOS: foram selecionados pacientes com diagnóstico de AMR associada à pseudoparalisia da elevação anterior submetidos à artroplastia reversa do ombro com seguimento mínimo de um ano.RESULTADOS: foram coletadas informações pré-operatórias, por meio do nosso Registro de Artroplastias do Ombro e Cotovelo, que consistiam em idade, sexo, lateralidade, história de procedimentos prévios, escores funcionais de Constant, além da amplitude de movimentos pré-operatórios, conforme protocolo da American Academy of Shoulder and Elbow Surgery (Ases). Com seguimento médio de 44 meses, 17 pacientes (94%) estavam satisfeitos com o resultado do procedimento.CONCLUSÃO: a artroplastia reversa no tratamento da AMR em pacientes com pseudoparalisia do ombro demonstrou-se efetiva na melhoria, com significância estatística, da amplitude de movimentos de flexão anterior e abdução. Porém, nesta série não houve melhoria da amplitude dos movimentos de rotação externa e interna. A artroplastia reversa é um procedimento que restabelece a função da articulação do ombro em pacientes que previamente não apresentavam possibilidades terapêuticas.

OBJECTIVE: to present a retrospective analysis on the clinical-functional results and complications among patients with rotator cuff arthropathy (RCA) who underwent reverse arthroplasty of the shoulder.METHODS: patients with a diagnosis of RCA associated with pseudoparalysis of anterior elevation who underwent reverse arthroplasty of the shoulder with a minimum follow-up of one year were selected.RESULTS: preoperative information was gathered from our shoulder and elbow arthroplasty register, comprising age, sex, laterality, history of previous procedures, Constant's functional scores and the preoperative range of motion as described in the protocol of the American Academy of Shoulder and Elbow Surgery (ASES). After a mean follow-up of 44 months, 17 patients (94%) were satisfied with the result from the procedure.CONCLUSION: reverse arthroplasty for treating RCA in patients with pseudoparalysis of the shoulder was shown to be effective in achieving a statistically significant improvement in range of motion regarding anterior flexion and abduction. However, in this series, there was no improvement in range of motion regarding external and internal rotation. Reverse arthroplasty is a procedure that reestablishes shoulder joint function in patients who previously did not present any therapeutic possibilities.

INTRODUÇÃO: as etapas de acabamento e polimento são essenciais para a obtenção de lisura e brilho da superfície de resinas acrílicas utilizadas na confecção de aparelhos ortodônticos. O bom acabamento da resina facilita a higiene, previne o manchamento e propicia maior conforto ao paciente. OBJETIVO: o objetivo desse trabalho foi analisar as alterações na morfologia superficial de resinas acrílicas (Clássico, São Paulo) durante as etapas do acabamento e polimento mecânico. MÉTODOS: foram confeccionados 30 discos (10mm de diâmetro e 5mm de altura) de resina acrílica autopolimerizável, que foram divididos aleatoriamente em dez grupos. O grupo controle não recebeu nenhum tratamento. Os demais grupos receberam acabamento e polimento graduais. O último grupo recebeu todo o tratamento de acabamento e polimento. A morfologia superficial foi avaliada qualitativamente por microscopia eletrônica de varredura e quantitativamente pela análise da rugosidade superficial. RESULTADOS: as superfícies de resina acrílica sem tratamento apresentaram bolhas, as quais não foram observadas nas fases subsequentes. O desgaste com fresa multilaminada seguido de acabamento com lixa de madeira e lixa d'água produziram superfícies com irregularidades decrescentes. As superfícies polidas com branco de Espanha e líquido de baixa abrasividade (Kaol) apresentaram bom acabamento superficial. CONCLUSÃO: é possível obter resina acrílica com alta lisura superficial após acabamento e polimento mecânico com fresas, lixas de madeira, lixas d'água, branco de Espanha e líquidos de baixa abrasividade (Kaol).

INTRODUCTION: The finishing and polishing phases are essential to improve smoothness and shining on the surface of acrylic resins used to make removable orthodontic appliances. A good surface finishing reduces roughness, which facilitates hygiene, prevents staining and provides greater comfort to the patients. OBJECTIVE: The aim of this paper was to analyze the changes on surface morphology of acrylic resins during finishing and polishing phases. METHODS: Thirty discs (10 mm in diameter and 5 mm in length) were made with acrylic resin and randomly divided into ten groups. The control group did not receive any treatment while the other groups received gradual finishing and polishing. The last group received the entire finishing and polishing procedures. Surface morphology was qualitatively analyzed through scanning electron microscopy and quantitatively analyzed through a laser profilometer test. RESULTS: The acrylic resin surfaces without treatment showed bubbles which were not observed in the subsequent phases. Wearing out with multilaminated burs, finishing with wood sandpaper and finishing with water sandpaper resulted in surfaces with decreasing irregularities. The surfaces that were polished with pumice and with low abrasive liquids showed high superficial smoothness. CONCLUSION: Highly smooth acrylic resin surfaces can be obtained after mechanical finishing and polishing performed with multilaminated burs, wood sandpaper, water sandpaper, pumice and low abrasive liquids.

In this paper, we present a comparison between OFDM and STDCC sounding techniques used to wide band channel characterization in suburban environments at 3.5 GHz band. Measurements of the received signal's power delay profile and power level for each of the sounding techniques were obtained. These experimental results are presented and compared. For this comparison, important wide band characterization information are obtained and the performances of each one of used techniques are observed.