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Search Results: 1 - 10 of 215084 matches for " Paula Silva de Carvalho; "
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Extremal graphs for the sum of the two largest signless Laplacian eigenvalues
Carla Silva Oliveira,Leonardo de Lima,Paula Rama,Paula Carvalho
Mathematics , 2013,
Abstract: Let G be a simple graph on $n$ vertices and $e(G)$ edges. Consider $Q(G) = D + A$ as the signless Laplacian of $G$, where $A$ is the adjacency matrix and $D$ is the diagonal matrix of the vertices degree of $G$. Let $q_1(G)$ and $q_2(G)$ be the first and the second largest eigenvalues of $Q(G),$ respectively, and denote by $S_{n}^{+}$ the star graph plus one edge. In this paper, we prove that inequality $q_1(G)+ q_2(G) <= e(G)+3$ is tighter for the graph $S_{n}^{+}$ among all firefly graphs and also tighter to $S_{n}^{+}$ than to the graphs $K_{k} \vee \overline{K_{n-k}}$ recently presented by Ashraf, Omidi and Tayfeh-Rezaie. Also, we conjecture that the same inequality is tighter to $S_{n}^{+}$ than any other graph on $n$ vertices.
Capacitor Cilíndrico Excêntrico
Carvalho, Ricardo Egydio de;Silva, Ana Paula Morinelli Amaral da;
Revista Brasileira de Ensino de Física , 2002, DOI: 10.1590/S1806-11172002000300006
Abstract: we consider the cylindrical capacitor with the inner plate out of centre and we calculate the corresponding capacitance using the conformal transformation technique. we observe that the capacitance may be amplified and the quantity of material to construct the capacitor may be reduced with the eccentric geometry. this result can be used as a tutorial for an experimental lecture in order to measure the e ect of the eccentricity in the capacitance and also in the construction of the cylindrical capacitor.
Capacitor Cilíndrico Excêntrico
Carvalho Ricardo Egydio de,Silva Ana Paula Morinelli Amaral da
Revista Brasileira de Ensino de Física , 2002,
Abstract: Consideramos o capacitor cilíndrico com a placa interna fora de centro e calculamos a capacitancia correspondente usando a técnica da transforma o conforme. Observamos que a capacitancia pode ser ampliada e a quantidade de material para construir o capacitor pode ser reduzida com a geometria excêntrica.Este resultado pode ser usado como tutorial de uma aula experimental para medir o efeito da excentricidade na capacitancia e na constru o do capacitor cilíndrico.
Rheological Study of Polymers Used as Viscosity Index Improvers for Automotive Lubricant Oils  [PDF]
Ana Paula Pena Almeida, Ana Paula Lelis Rodrigues de Oliveira, Cynthia D’ávila Carvalho Erbetta, Ricardo Geraldo de Sousa, Roberto Fernando de Souza Freitas, Maria Elisa Scarpelli Ribeiro e Silva
Journal of Modern Physics (JMP) , 2014, DOI: 10.4236/jmp.2014.512110

In this work, a rheological study of automotive lubricant oils, neutral light paraffinic (NLP) and neutral medium paraffinic (NMP), additivated with two commercial viscosity index improvers-VIIs, based on hydrogenated poly (isoprene-co-styrene), at different concentrations, was carried out. The study included the determination of the kinematic viscosity of the mixtures, the calculation of the viscosity indexes and their behavior when subjected to various rheometric experiments, including stress sweep, steady state flow, creep and recovery, and temperature ramp oscillatory tests. The obtained results showed the efficacy of the additives as viscosity index improvers, enabling a significant increase in the viscosity index of the pure oils at relatively low concentrations. The determination of the storage (G’) and of the loss (G”) moduli for the mixtures oil/VII additives showed a large predominance of the viscous effect over the elastic one. Except when under low shear stress, the mixtures showed a pseudoplastic behavior, with the flow curves being adjusted to fit the Ostwald-de-Waele model (Power Law), with negative flow behavior indexes.

Lymphedema in the Mastectomy Postoperative Period: An Integrative Literature Review  [PDF]
Ana Fátima Carvalho Fernandes, Glécya Oliveira Vidal, Camila Brasil Moreira, Tiago Barreto de Castro e Silva, Paula Natasha Rodrigues Valentim, Míria Concei??o Lavinas Santos
Advances in Breast Cancer Research (ABCR) , 2013, DOI: 10.4236/abcr.2013.24025

Aims and Objectives: To analyze the evidence available in the literature on the stages during which upper limb lymphedema after mastectomy occurs. Background: Among the adverse effects of breast cancer treatment, lymphedema is the most prevalent. Design: Integrative literature review. Methods: The Latin American and Caribbean Literature on Health Sciences (Literatura Latino-Americana e do Caribe em Ciências da Saúde—LILACS), PubMed, and Cumulative Index to Nursing and Allied Health Literature (CINAHL) databases were used to select the pertinent studies. The identification data for these studies were summarized, and their methodological features and results were extracted. Results: Regarding the time elapsed since surgery, the highest prevalence of lymphedema corresponded to the late postoperative period, and regarding its severity, mild lymphedema was the most prevalent form. The prevalence was also the highest among the women who were subjected to radical mastectomy and radiotherapy. Conclusions: Many women who are undergoing treatment for breast cancer use strategies for the prevention and control of lymphedema of the upper limb following mastectomy. Relevance to Clinical Practice: The findings of the present study might inform future studies aiming to assess strategies that can be started in the immediate and late postoperative stages to detect lymphedema early and prevent the increase of its prevalence during the late postoperative period after mastectomy.

Solid waste management at Araguatins` City – Tocantins
Aurean de Paula Paula Carvalho,Dany Geraldo Kramer Cavalcante e Silva,Ridelson Farias de Sousa,Severino Pereira de Sousa Junior
Engenharia Ambiental : Pesquisa e Tecnologia , 2007,
Abstract: This work had as objective to analyze the problem that involves the disposition of solid waste in Araguatins city, state of Tocantins, Brazil, as well as to generate a database that can subsidize the public administration in the decisions of implantation of management solutions. In agreement with the obtained results the municipal district presents flaws (technical limitations) in your waste management of system, which is going since from the collect until final disposition. Therefore it was brought to a conclusion that the search of alternatives for to protect the environment and to reduce the risks the human health they need is constant, as well the implantation of new technologies and practices that aggregate economical values to the garbage.
Structural Accessibility of Gynecological Nursing Clinics for Users with Motor Disabilities in Basic Health Units  [PDF]
Ana Talyne Pessoa, Beatriz da Silva Lima, Lorita Marlena Freitag Pagliuca, Paula Marciana Pinheiro de Oliveira, Leilane Barbosa de Sousa, Paulo César de Almeida, Luciana Vieira de Carvalho, Aline Cruz Esmeraldo áfio
Open Journal of Nursing (OJN) , 2015, DOI: 10.4236/ojn.2015.510095
Abstract: A quantitative descriptive study aimed to evaluate the physical structure accessibility of gynecological nursing clinics and their bathrooms in basic health units for users with motor disabilities. A checklist tool/instrument was applied for analyzing 16 items in the bathroom and four in the nursing clinic. 157 basic health units were evaluated. In the nursing clinic, counters and tables (79.6%) were accessible, but stretchers (93%), seats (93.6%) and doors (87.3%) were inaccessible; moreover, 17.8% of the units examined proved totally inaccessible. In the bathroom, the items with the best evaluation were the height of the toilet flusher (47%) with operation by slight pressure (44.6%) and the wall-mounted sink (42.7%). Bathroom doors and turning area/space for wheelchairs were inaccessible. No bathroom reached full accessibility, and 31.2% were entirely inaccessible. Non-compliance was evident of the standard 9050:2004 of the Brazilian Association of Technical Standards. Raising the awareness of health and engineering professionals is recommended to learn technical accessibility standards and implement them.
Fontes de energia em suplementos múltiplos para recria de bovinos em pastejo no período da seca: desempenho e analise econ mica
Daniel Marino Guedes de Carvalho,Joanis Tilemaros Zervoudakis,Luciano da Silva Cabral,Nelcino Francisco de Paula
Revista Brasileira de Saúde e Produ??o Animal , 2009,
Abstract: Objetivou-se avaliar diferentes fontes energéticas em suplementos múltiplos no período da seca, sobre os ganhos de peso total (GPT), ganho médio diário (GMD), peso vivo final (PVF), consumo de suplemento e custos de produ o. Avaliaram-se suplementos à base de farelo de soja + casca de soja (SCS); farelo de soja + gr o de milho moído (SM); farelo de soja + gr o de sorgo moído (SS); farelo de soja + gr o de milheto moído (SMI). Foram utilizados 20 novilhos, com peso médio inicial de 160 kg. Os suplementos foram fornecidos diariamente na quantidade de 1 kg/animal/dia às 10h da manh . No primeiro dia de cada período experimental, foram feitas coletas de forragem para estimar a disponibilidade de matéria seca/ha e determinar a composi o químico-bromatológica da forragem ingerida pelos animais. As disponibilidades médias de matéria seca total (MST), matéria seca potencialmente digestível (MSpD), matéria seca de folhas verdes (MSFV), matéria seca de folhas secas (MSFS), matéria seca de colmo verde (MSCV) e matéria seca de colmo seco (MSCS) de pastagens Brachiaria brizantnha cv. Marandu foram de 5.718; 3.692; 588; 1.966; 1.788 e 1.375 kg/ha. Os consumos de suplemento foram de 0,951; 0,930; 0,976 e 0,886 kg/animal/dia, respectivamente, para os tratamentos SCS, SM, SS e SMI. N o se verificou diferen a (P>0,05) entre os tratamentos para PVF, GPT e GMD. Os GMD, para os tratamentos SS, SMI, SM e SCS, foram, respectivamente, de 0,751; 0,713; 0,752 e 0,786 kg/animal/dia. O tratamento SCS proporcionou ganhos de peso com menor custo.
Corre??o da acidez do solo e controle do capim-sapé
Carvalho, Margarida Mesquita;Xavier, Deise Ferreira;Freitas, Vicente de Paula;Verneque, Rui da Silva;
Revista Brasileira de Zootecnia , 2000, DOI: 10.1590/S1516-35982000000100005
Abstract: abstract - a field experiment was conducted to determine the effect of acid soil correction, on the control of the sapé (imperata brasiliensis), a grass type weed of pasture. a molasses grass (melinis minutiflora) pasture in a red-yellow latosol, having a high proportion of "sapé" was used. treatments consisted of five levels of dolomite limestone (0, 1, 2, 4 and 6 t/ha) incorporated by hand using a garden tool to the top 20 cm of soil following a mechanical tillage of the plots (disking). an additional treatment without disking and without lime was adopted. the experimental design was randomized blocks with four replications. during the 33 months of the experimental period, three harvests and two soil samplings were performed. there were no effects of lime rates on the dry matter yield of both sapé and the other species (molasses grass, brachiaria decumbens and broad leaf weeds), despite of the changes in the soil chemical characteristics. the correction of acid soils, when associated with the correction of main nutritional deficiencies, can control the weed "sapé" by improving the forage growth.
Corre o da acidez do solo e controle do capim-sapé
Carvalho Margarida Mesquita,Xavier Deise Ferreira,Freitas Vicente de Paula,Verneque Rui da Silva
Revista Brasileira de Zootecnia , 2000,
Abstract: RESUMO - Um experimento de campo foi realizado para verificar o efeito da corre o da acidez do solo sobre o controle do capim-sapé (Imperata brasiliensis), gramínea invasora de pastagens. Pastagem de capim-gordura (Melinis minutiflora) em Latossolo Vermelho-Amarelo, com intensa infesta o de capim-sapé foi usada. Os tratamentos consistiram de cinco doses de calcário dolomítico (0, 1, 2, 4 e 6 t/ha), incorporado ao solo manualmente com auxílio de enxada, à profundidade de 20 cm, após gradagem das parcelas. Um tratamento extra, sem calcário e gradagem foi adotado. O delineamento experimental foi em blocos ao acaso com quatro repeti es. No período de 33 meses de dura o do experimento, foram feitos três cortes da vegeta o aérea e duas amostragens de solo. N o houve efeito das doses de calcário sobre a produ o de matéria seca do capim-sapé e das outras espécies (capim-gordura, Brachiaria decumbens e invasoras de folhas largas), apesar de terem ocorrido altera es nas características químicas do solo. A corre o da acidez do solo, quando associada às corre es das principais deficiências nutricionais, pode controlar o capim-sapé, ao estimular o crescimento das forrageiras.
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