Stall in ground effect using the unsteady vortex lattice method with Kirchhoff-based correction

Neves, Carlos A.,Boschetti, Pedro J. Techno-Press 2021 Advances in aircraft and spacecraft science Vol.8 No.2

The goal of this research is to evaluate the stall behavior of a high aspect ratio rectangular wing in ground effect using an unsteady vortex-lattice method with a Kirchhoff-based correction (UVLM-K), including how the lift coefficient achieved in stall is affected by dynamic ground effect. A flow separation algorithm based on the Kirchhoff-Helmholtz theory and a flow separation model presented by Fischenberg are applied. The code was validated using experimental data from previously published works. The stall behavior of a rectangular wing of aspect ratio of 8.587 formed with a NACA 4415 airfoil section was studied in static and dynamic ground effect. To obtain the empirical data required by the UVLM-K, the NACA4415 airfoil was simulated at fixed height aboveground using a finite-volume code solver. The wing simulation results have shown that the lift coefficient achieved by the wing in stall for takeoff and flare maneuvers are lower than those estimated at a fixed height above the ground. It can be concluded, based on the results obtained herein, that the stall behavior of a wing in dynamic ground effect depends on the history of the maneuver.

Integration of the PubAnnotation ecosystem in the development of a web-based search tool for alternative methods

Neves, Mariana Korea Genome Organization 2020 Genomics & informatics Vol.18 No.2

Finding publications that propose alternative methods to animal experiments is an important but time-consuming task since researchers need to perform various queries to literature databases and screen many articles to assess two important aspects: the relevance of the article to the research question, and whether the article's proposed approach qualifies to being an alternative method. We are currently developing a Web application to support finding alternative methods to animal experiments. The current (under development) version of the application utilizes external tools and resources for document processing, and relies on the PubAnnotation ecosystem for annotation querying, annotation storage, dictionary-based tagging of cell lines, and annotation visualization. Currently, our two PubAnnotation repositories for discourse elements contain annotations for more than 110k PubMed documents. Further, we created an annotator for cell lines that contain more than 196k terms from Cellosaurus. Finally, we are experimenting with TextAE for annotation visualization and for user feedback.

Stall in ground effect using the unsteady vortex lattice method with Kirchhoff-based correction

Neves, Carlos A.,Boschetti, Pedro J. Techno-Press 2021 Advances in aircraft and spacecraft science Vol.8 No.2

The goal of this research is to evaluate the stall behavior of a high aspect ratio rectangular wing in ground effect using an unsteady vortex-lattice method with a Kirchhoff-based correction (UVLM-K), including how the lift coefficient achieved in stall is affected by dynamic ground effect. A flow separation algorithm based on the Kirchhoff-Helmholtz theory and a flow separation model presented by Fischenberg are applied. The code was validated using experimental data from previously published works. The stall behavior of a rectangular wing of aspect ratio of 8.587 formed with a NACA 4415 airfoil section was studied in static and dynamic ground effect. To obtain the empirical data required by the UVLM-K, the NACA4415 airfoil was simulated at fixed height aboveground using a finite-volume code solver. The wing simulation results have shown that the lift coefficient achieved by the wing in stall for takeoff and flare maneuvers are lower than those estimated at a fixed height above the ground. It can be concluded, based on the results obtained herein, that the stall behavior of a wing in dynamic ground effect depends on the history of the maneuver.

Porosity and pore size distribution in high-viscosity and conventional glass ionomer cements: a micro-computed tomography study

Neves Aline Borburema,Lopes Laísa Inara Gracindo,Bergstrom Tamiris Gomes,Silva Aline Saddock Sá da,Lopes Ricardo Tadeu,Neves Aline de Almeida 대한치과보존학회 2021 Restorative Dentistry & Endodontics Vol.46 No.4

Objectives This study aimed to compare and evaluate the porosity and pore size distribution of high-viscosity glass ionomer cements (HVGICs) and conventional glass ionomer cements (GICs) using micro-computed tomography (micro-CT). Materials and Methods Forty cylindrical specimens (n = 10) were produced in standardized molds using HVGICs and conventional GICs (Ketac Molar Easymix, Vitro Molar, MaxxionR, and Riva Self-Cure). The specimens were prepared according to ISO 9917-1 standards, scanned in a high-energy micro-CT device, and reconstructed using specific parameters. After reconstruction, segmentation procedures, and image analysis, total porosity and pore size distribution were obtained for specimens in each group. After checking the normality of the data distribution, the Kruskal-Wallis test followed by the Student-Newman-Keuls test was used to detect differences in porosity among the experimental groups with a 5% significance level. Results Ketac Molar Easymix showed statistically significantly lower total porosity (0.15%) than MaxxionR (0.62%), Riva (0.42%), and Vitro Molar (0.57%). The pore size in all experimental cements was within the small-size range (< 0.01 mm3), but Vitro Molar showed statistically significantly more pores/defects with a larger size (> 0.01 mm3). Conclusions Major differences in porosity and pore size were identified among the evaluated GICs. Among these, the Ketac Molar Easymix HVGIC showed the lowest porosity and void size.

Can the body composition of crossbred dairy cattle be predicted by equations for beef cattle?

Neves, Maria Luciana Menezes Wanderley,de Souza, Evaristo Jorge Oliveira,Veras, Robson Magno Liberal,de Campos Valadares Filho, Sebastiao,Marcondes, Marcos Inacio,da Silva, Gabriel Santana,Barreto, Li Asian Australasian Association of Animal Productio 2018 Animal Bioscience Vol.31 No.10

Objective: The aim of the study was to evaluate the efficiency of the Hankins and Howe (HH46), Valadares Filho (V06), and Marcondes (M12) equations for predicting the physical and chemical composition of dairy crossbred bulls carcasses, as well as the chemical composition of their empty bodies. Methods: This study was conducted using 30 dairy crossbred bulls. One group of five animals was slaughtered at the beginning of the experiment, and the remaining were slaughtered 112 days later. Animals were distributed in a completely randomized design into treatments consisting different levels of concentrate (0%, 17%, 34%, 51%, and 68%). The physical and chemical compositions of the cattle were obtained from the right half of the carcass and using samples taken between the 9th and 11th ribs of the left half of the carcass. The estimated and experimentally determined values were compared using the correlation and concordance coefficient, as well as the mean square error of prediction (MSEP) and its components. Results: The HH46 equations were better at estimating the amount of muscle plus fat in the carcass. The amount of bone in the carcasses could not be well estimated by the HH46 and M12 models. The M12, HH46, and V06 equations were worst at estimating the amounts of protein, ether extract, and water in the carcass, respectively. In the empty body, the amounts of protein and water were well estimated by the HH46 equations. Protein, ether extract, and water were accurately estimated by the V06 equations, and ether extract by the M12 equations. Conclusion: The physical and chemical composition of dairy crossbred bull carcasses, as well as the chemical composition of their empty bodies, can be predicted using the equations tested here. The amount of bone in these carcasses could not be accurately predicted.

LOW FREQUENCY IMPACT SOUND TRANSMISSION THROUGH TIMBER-JOISTED FLOORS

Albano Neves e Sousa 한국소음진동공학회 2008 한국소음진동공학회 국제학술대회논문집 Vol.2008 No.7

Optimal voice packet classification for enhanced VoIP over priority-enabled networks

Filipe Neves,Salviano Soares,Pedro A. Amado Assuncao 한국통신학회 2018 Journal of communications and networks Vol.20 No.6

This paper proposes a method for optimal classificationof voice packets to enhance the quality of voice communicationsover priority-enabled networks when poor transmission conditionsoccur. Either high or low priority is assigned to each packetaccording to the relevance of its payload (voice segment) for thevoice intelligibility. Then, in case of constrained networking conditions,by discarding first the voice packets of lower importance,the network always delivers those segments that most contributeto the perceptual quality. The proposed method is based on a dynamicprogramming optimisation algorithm that finds the optimalsubset of m high priority voice segments in each utterance of sizen > m. Such optimal subset minimizes the reconstruction distortionover all possible subsets with the same size m (i.e., the distortionincurred by a utterance reconstructed from only m segments). The simulation results show that the proposed method consistentlyachieves higher mean opinion scores (MOS) in comparisonwith non-selective packet drop under the same random networkloss conditions, yielding better quality of experience (QoE)for the same packet loss rates (PLR). The priority classification algorithmis independent from error concealment methods and distortionmetrics used in the optimisation process, which allows generalisationfor diverse communication networks and applications.

Correlation between muscle mass, nutritional status and physical performance of elderly people

Thiago Neves,Carlos Alexandre Fett,Eduardo Ferriolli,Milene Giovana Crespilho Souza,Adilson Domingos dos Reis Filho,Marcela Bomfim Martin Lopes,Neusa Maria Carraro Martins,Waleria Christiane Rezende Fe 대한골다공증학회 2018 Osteoporosis and Sarcopenia Vol.4 No.4

Objectives: This study evaluated the relationship between the skeletal muscle mass (SMM), obtained by predictive equations, and the body composition, nutritional aspects, functionality and physical performance in elderly people. Methods: The sample consisted of adults aged 65 years or over from the cross-sectional study of the Brazilian Elderly Frailty Study Network, in Cuiaba, Mato Grosso State, Brazil. The anthropometric parameters, instrumental activities of daily living (IADL), Short Physical Performance Battery (SPPB), and handgrip strength (HGS) were evaluated. The SMM was estimated by 2 predictive anthropometric equations. Results: Both SMM equations correlated with age, anthropometric indices, SPPB, IADL, and HGS. However, only HGS and neck circumference strongly correlated in both equations, being higher in SMM II. Conclusions: It seems that both equations are sensitive to obtain the SMM, contributing to the diagnosis of sarcopenia, nutritional status, and a physical performance condition.

Prevalent Signs and Symptoms in Patients with Skin Cancer and Nursing Diagnoses

Lisboa, Isabel Neves Duarte,de Azevedo Macena, Monica Suela,da Conceicao Dias Fernandes, Maria Isabel,de Almeida Medeiros, Ana Beatriz,de Lima, Cyndi Fernandes,de Carvalho Lira, Ana Luisa Brandao Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.7

Background: Skin cancer has a remarkable importance given the high incidence in the population. In Brazil, it is estimated that there were 98,420 new cases of non-melanoma skin cancer among men and 83,710 new cases among women in 2014. Objectives: To verify signs and symptoms present in patients with skin neoplasms according to the literature and relate them to the nursing diagnoses of NANDA International. Materials and Methods: Integrative literature review carried out from March to May 2015 in the databases: Cumulative Index to Nursing and Allied Health Literature, SCOPUS, National Library of Medicine and Nattional Institutes of Health, Latin American and Caribbean Sciences of Health and Web of Science. The descriptors used were: 'Signs and Symptoms' and 'Skin Neoplasms'. Sixteen articles were identified as the final sample. After review, the signs and symptoms of skin cancer identified in the literature were related to the defining characteristics present in NANDA International, with the aim to trace possible nursing diagnoses. Results: The most prevalent signs and symptoms were: asymmetric and well circumscribed nodules with irregular borders; speckles with modified color aspect; ulcerations; blisters; pain; itching; and bleeding. The principal nursing diagnoses outlined were: risk for impaired skin integrity; impaired skin integrity; acute pain; risk of shock; and impaired comfort. Conclusions: The identification of signs and symptoms present in patients with skin cancer and the relationships of these with the nursing diagnoses of NANDA International provide a basis for qualified and systematized nursing care to this clientele.

Effect of Acupuncture at Tender Points for the Management of Fibromyalgia Syndrome: A Case Series

Jessica Lucia Neves Bastos,Josie Resende Torres Silva,Marcelo Lourenco Silva,Fernanda Lopes Buiatti de Araujo,Elisa Do´ria Pires 사단법인약침학회 2013 Journal of Acupuncture & Meridian Studies Vol.6 No.3

Background: Affecting more women than men, fibromyalgia syndrome (FMS) is a rheumatic disorder characterized by chronic, diffuse and widespread musculoskeletal pain, and its pathogenesis is still unknown. Among the recommended treatments, acupuncture (for its analgesic effects) is an effective option for reducing the pain sensitivity and improving quality of life. Therefore, this study aimed to investigate whether acupuncture at tender points could effectively manage FMS. Methods: Eight female patients, with a previous diagnosis of fibromyalgia, underwent an initial assessment involving pressure algometer measurements for pain tolerance and questionnaires [Fibromyalgia Impact Questionnaire (FIQ), Heath Assessment Questionnaire (HAQ), Beck Depression Inventory (BDI), and Beck Anxiety Inventory (BAI)], followed by treatment. Over a 2-month period, acupuncture was performed once per week at five tender points, located bilaterally at the occipital bone, trapezius, rhomboid, upper chest and lateral epicondyle. At the end of treatment, the participants underwent a reassessment for a final review of the applied methods. Results: We observed a reduction in the pain threshold and sensitivity and improvement in the areas of anxiety and depression and quality of life, which were demonstrated using the FIQ, BDI and BAI but not the HAQ.