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Search Results: 1 - 10 of 617903 matches for " Ana Lúcia F. de Lima e;Silva "
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Numerical simulation of two-dimensional complex flows around bluff bodies using the immersed boundary method
Silva, Ana Lúcia F. de Lima e;Silva, Alice Rosa da;Silveira Neto, Aristeu da;
Journal of the Brazilian Society of Mechanical Sciences and Engineering , 2007, DOI: 10.1590/S1678-58782007000400006
Abstract: this paper presents a two-dimensional numerical simulation of flows around different bluff bodies, at re = 100 and 200, using the immersed boundary (ib) method, as a sequence of a previous work. the force density term required by the ib method is obtained with the virtual physical model (vpm). simulations were carried out for two circular cylinders of different diameter in tandem, two cylinders of the same diameter in tandem and two cylinders placed in side by side arrangement. the configurations of seven cylinders in a 'v' arrangement, for angles of 40o < a < 180o, were also simulated. a configuration of 23 different bluff bodies, representing a transverse cut in a central tower of an offshore structure, has been also simulated and the results were compared with a single compact square, of equivalent size. the strouhal number, the drag and the lift coefficients were also calculated. the strouhal number is calculated using the fast fourier transform (fft) of the lift coefficient temporal distribution. visualization of the vorticity and pressure fields and the streamlines are presented for each simulation showing the flow dynamics and patterns. it was possible to verify that the ib method with vpm is a powerful methodology to simulate flows in the presence of complex geometries.
Identification of temperature-dependent thermal properties of solid materials
Tillmann, Amanda R.;Borges, Valério Luiz;Guimar?es, Gilmar;Silva, Ana Lúcia F. de Lima e;Silva, Sandro M. M. de Lima e;
Journal of the Brazilian Society of Mechanical Sciences and Engineering , 2008, DOI: 10.1590/S1678-58782008000400001
Abstract: this work proposes an experimental technique for the simultaneous estimation of temperature-dependent thermal diffusivity, α, and thermal conductivity, λ, of insulation materials. the thermal model used considers a transient one-dimensional heat transfer problem. the determination of these properties is done by using the principle of the mixed technique. in this technique two objective functions are defined, one in the frequency domain and the other in the time domain. the objective function in the frequency domain is based on the square difference between experimental and calculated values of the phase angle, while the other objective function is the least square error function of experimental and calculated signals of temperature. the properties α and λ are obtained by using an experimental apparatus that basically consists of a polyvinyl chloride (pvc) sample exposed to different temperatures inside an oven. the temperature inside the oven is controlled by a pid temperature controller. the properties α and λ were estimated for 7 (seven) points of average temperature in a range from 20 oc to 66 oc. the properties were determined with an additional heating of approximately 4.5 k on the frontal surface. analyses of sensitivity, sensors location and sample dimensions were also made.
Vigilancia de doen?as endêmicas em áreas urbanas: a interface entre mapas de setores censitários e indicadores de morbidade
Ximenes, Ricardo Arraes de Alencar;Martelli, Celina Maria Turchi;Souza, Wayner Vieira de;Lapa, Tiago Maria;Albuquerque, Maria de Fátima Milit?o de;Andrade, Ana Lúcia S. Sampaio de;Morais Neto, Otaliba Libanio de;Silva, Simonne de Almeida e;Lima, Maria Luiza Carvalho de;Portugal, José Luiz;
Cadernos de Saúde Pública , 1999, DOI: 10.1590/S0102-311X1999000100006
Abstract: in this article we discuss the methodological issues associated with the creation of a surveillance system for endemic diseases in urban areas based on analysis of populations at risk and on spatially referenced epidemiological indicators. we comment on the system's basic requirements, selection criteria for socioeconomic variables, and methodological steps to combine these variables so as to construct a census-based deprivation index. we also present the ways we solved some operational problems related to generation of digitized census tracts maps and linkage of morbidity data from different sources. this approach, spatial organization into account in surveillance of endemic diseases, exemplified here by tuberculosis and leprosy, allows for the interaction of several official data sets from census and health services in order to geographically discriminate inner-city risk strata. criteria for constructing these risk strata were considered a useful tool for health planning and management activities for the control of endemic diseases in cities.
Crescimento de Hymenaea courbaril L. var. stilbocarpa (Hayne) Lee et Lang. e Enterolobium contortisiliquum (Vell.) Morong (Leguminosae) sob diferentes níveis de sombreamento
Lima, Ana Lúcia da Silva;Zanella, Fábio;Castro, Ley Daiana Marins de;
Acta Amazonica , 2010, DOI: 10.1590/S0044-59672010000100006
Abstract: hymenaea courbaril l. var. stilbocarpa (hayne) lee et lang. is a clímax shadow tolerant specie and enterolobium contortisiliquum (vell.) morong., by the other hand, is considered as a pioneer specie. the development of these species may reflect its adaptation ability to different environmental elements (light, water and temperature) at its growth site. an inadequate supply of some of these elements may reduce plant vigor and limit its development. this work aimed to evaluate the effects of shade intensity on the growth and photosynthetic pigment concentration of two arboreal legumes that are typical to northern brazil, namely, the hymenaea courbaril l. var. stilbocarpa (hayne) lee et lang. and the enterolobium contortisiliquum (vell.) morong. the experiment was carried out at the centro universitário luterano de ji-paraná (ceulj/ulbra)/rond?nia. during the formation of the seedlings, both species were exposed to four treatments of shade: 0 % (control - without shade); 30 %; 50 % e 80 %. each treatment was carried out with three replications for each species; the experimental design was completely randomized. four month after sowing, the following analyses were carried out: number of leaves, plant height, roots length, dry mass and photosynthetic pigment concentration. the treatment under 0% shade impaired the seedling growth of both species. the most favorable treatments were 50 % and 80 % shade. according to the shade intensity, the chlorophyll a/b ratio decreased and the chlorophyll and carotenoids increased.
Pedro Alves Costa,Ana Lúcia da Silva Lima,Fábio Zanella,Hélide de Freitas
Pesquisa Agropecuária Tropical , 2009, DOI: 10.5216/pat.v40i1.4092
Abstract: Seed dormancy limits the seedling production and potential of use in Adenanthera pavonina L. The objective of this research was to evaluate the best dormancy breaking method in Adenanthera pavonina L. seeds. It was carried out at the Ceulji/Ulbra Laboratory of Botany, from April to June 2007, and six dormancy breaking treatments (T) were tested: T1 - Boil for 15 minutes and rest for 16 hours, in the same water; T2 - Boil for 10 minutes and rest for 16 hours, in the same water; T3 - Immersion in boiling water (95oC) and rest for 24 hours, in the same water; T4 and T5 - Immersion in concentrated sulfuric acid (98%), for 5 and 10 minutes, respectively; and T6 - Control. The following items were evaluated: days until germination, germination speed index (GSI), and germination percentage (%GER). Variance analysis was used to evaluate the data and means were compared by using the Duncan’s test (5%). Treatments 1 and 2 caused seeds damage, preventing their germination. Treatments 4 and 5 showed no significant differences, but were more favorable to dormancy breaking, if compared to the other treatments. KEY-WORDS: Germination; chemical scarification; boiling; sulfuric acid. A dormência das sementes limita a produ o de mudas e o potencial de uso de Adenanthera pavonina L. O presente trabalho objetivou determinar o melhor método para quebra de dormência, em sementes de A. pavonina. O experimento foi conduzido no Centro Universitário Luterano de Ji-Paraná (Ceulji/Ulbra), de abril a junho de 2007. Foram testados seis tratamentos (T): T1 - Fervura por 15 minutos e repouso por 16 horas, na mesma água; T2 - Fervura por 10 minutos e repouso por 16 horas, na mesma água; T3 - Imers o em água quente (95oC) e repouso por 24 horas, na mesma água; T4 e T5 - ácido sulfúrico concentrado (98%), durante 5 e 10 minutos, respectivamente; e T6 - Testemunha. Avaliou-se o índice de velocidade de germina o (IVG), pe
Perfil sociodemográfico e clínico de uma equipe de enfermagem portadora de Hipertens?o Arterial
Custódio, Ires Lopes;Lima, Francisca Elisangela Teixeira;Almeida, Maria Irismar de;Silva, Lúcia de Fátima da;Monteiro, Ana Ruth Macedo;
Revista Brasileira de Enfermagem , 2011, DOI: 10.1590/S0034-71672011000100003
Abstract: descriptive-exploratory study carried out in a hospital from fortaleza, ce, brazil to evaluate the characteristics of nursing professionals with high blood pression from a hospital for cardiovascular diseases. in the population of the nursing staff, the sample had 130 participants, who met the criteria for inclusion. data were collected through interviews and sociodemographic characteristics were predominant: average level (72.3%), female (79.2%), age> 40 years (79.2%), married (41.5%) and non-whites (65.4%). non-modifiable risk factors identified: familial history (71.5%). the modifiable were: diabetes mellitus (24.6%), smoking (35.4%), alcoholism (43.8%), inadequate diet (68.5%), hyperlipidemia (24.6%) and sedentary (62.3%). it is be necessary to develop strategies for health education and program monitoring of health professionals, in order to control blood pressure and preventing cardiovascular complications
Nutritional value of Marandu grass, under grazing by three sampling methods
Lima, Hellen Leles;Goes, Rafael Henrique de Tonissi e Buschinelli de;Cerilo, Sara Letícia Nocchi;Oliveira, Euclides Reuter de;Brabes, Kelly Cristina da Silva;Teodoro, Ana Lúcia;
Acta Scientiarum. Animal Sciences , 2012, DOI: 10.4025/actascianimsci.v34i4.13745
Abstract: to evaluate the grass b. brizantha cv. marandu, under grazing, we use three sampling methods: total availability (ta), hand plucked (hp) and extrusa (ext) in a completely randomized design with four replications. the hand plucked method was collected manually after observing the behavior of grazing animals. ta was determined by cutting at ground level, using a metallic square (0.25 m2) and ext was collected by rumen evacuation. the values for dry matter (dm), neutral detergent fiber (ndf) and acid detergent fiber (adf), were 27.20, 88.52 and 43.70% in the treatment and hp, and 25.53, 87.70 and 45.50% in ta. the extrusa had the lowest dm content (15.88%) and higher crude protein (cp) (15.22%), possibly due to the presence of saliva. the levels checked for extrusa ndf, adf and in vitro digestibility of dry matter were 81.98, 36.90 and 79.10%, demonstrating the selectivity of the animals. the high levels of fda for ta reflect the composition of the forage with the high proportion of senescent material. the samples obtained by the total availability were not representative of the diet consumed by cattle. the different sampling methods influence the chemical composition of b. brizantha cv. marandu.
Synthesis and Pharmacological Evaluation of Novel Phenyl Sulfonamide Derivatives Designed as Modulators of Pulmonary Inflammatory Response
Maria Letícia de Castro Barbosa,Thiago José Figueira Ramos,Ana Carolina Santos de Arantes,Marco Aurélio Martins,Patrícia Machado Rodrigues e Silva,Eliezer J. Barreiro,Lídia Moreira Lima
Molecules , 2012, DOI: 10.3390/molecules171214651
Abstract: In this paper we report the design, synthesis and pharmacological evaluation of a new series of phenyl sulfonamide derivatives 2a–h and 3–8 planned by structural modification on the anti-inflammatory prototype LASSBio-468 (1). Among the synthesized analogues, the tetrafluorophthalimide LASSBio-1439 (2e) stands out showing an in vitro anti-TNF-α effect similar to the standard thalidomide. The relevance of tetrafluorination of the phthalimide nucleus was also confirmed by the anti-inflammatory profile of 2e, through oral administration, in a murine model of pulmonary inflammation. The corresponding tetrafluorocarboxyamide metabolite LASSBio-1454 (15), generated from partial hydrolysis of the derivative 2e, presented a significant in vitro effect and a pronounced anti-inflammatory activity in vivo.
Population-based surveillance of pediatric pneumonia: use of spatial analysis in an urban area of Central Brazil
Andrade, Ana Lúcia Sampaio Sgambatti de;Silva, Simonne Almeida e;Martelli, Celina Maria Turchi;Oliveira, Renato Maurício de;Morais Neto, Otaliba Libanio de;Siqueira Júnior, Jo?o Bosco;Melo, Lícia Kamila;Di Fábio, José Luis;
Cadernos de Saúde Pública , 2004, DOI: 10.1590/S0102-311X2004000200008
Abstract: this study examined the spatial distribution of childhood community-acquired pneumonia detected through prospective surveillance in goiania, brazil. three spatial analysis techniques were applied to detect intra-urban geographic aggregation of pneumonia cases: kernel method, nearest neighbor hierarchical technique, and spatial scan statistic. a total of 724 pneumonia cases confirmed by chest radiography were identified from may 2000 to august 2001. all cases were geocoded on a digital map. the annual pneumonia risk rate was estimated at 566 cases/100,000 children. analysis using traditional descriptive epidemiology showed a mosaic distribution of pneumonia rates, while gis methodologies showed a non-random pattern with hot spots of pneumonia. cluster analysis by spatial scan statistic identified two high-risk areas for pneumonia occurrence, including one most likely cluster (rr = 2.1; p < 0.01) and one secondary cluster (rr = 1.3; p = 0.01). the data used for the study are in line with recent who-led efforts to improve and standardize pediatric pneumonia surveillance in developing countries and show how gis and spatial analysis can be applied to discriminate target areas of pneumonia for public heath intervention.
Gram-negative osteomyelitis: clinical and microbiological profile
Carvalho, Vladimir Cordeiro de;Oliveira, Priscila Rosalba Domingos de;Dal-Paz, Karine;Paula, Adriana Pereira de;Félix, Cássia da Silva;Lima, Ana Lúcia Lei Munhoz;
Brazilian Journal of Infectious Diseases , 2012, DOI: 10.1590/S1413-86702012000100011
Abstract: introduction: despite the growing interest in the study of gram-negative bacilli (gnb) infections, very little information on osteomyelitis caused by gnb is available in the medical literature. objectives and methods: to assess clinical and microbiological features of 101 cases of osteomyelitis caused by gnb alone, between january 2007 and january 2009, in a reference center for the treatment of high complexity traumas in the city of s?o paulo. results: most patients were men (63%), with median age of 42 years, affected by chronic osteomyelitis (43%) or acute osteomyelitis associated to open fractures (32%), the majority on the lower limbs (71%). the patients were treated with antibiotics as inpatients for 40 days (median) and for 99 days (median) in outpatient settings. after 6 months follow-up, the clinical remission rate was around 60%, relapse 19%, amputation 7%, and death 5%. nine percent of cases were lost to follow-up. a total of 121 gnb was isolated from 101 clinical samples. the most frequently isolated pathogens were enterobacter sp. (25%), acinetobacter baumannii (21%) e pseudomonas aeruginosa (20%). susceptibility to carbapenems was about 100% for enterobacter sp., 75% for pseudomonas aeruginosa and 60% for acinetobacter baumannii. conclusion: osteomyelitis caused by gnb remains a serious therapeutic challenge, especially when associated to nonfermenting bacteria. we emphasize the need to consider these agents in diagnosed cases of osteomyelitis, so that an ideal antimicrobial treatment can be administered since the very beginning of the therapy.
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