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Search Results: 1 - 10 of 183299 matches for " Marcelo de Sampaio "
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Advances in Radar Technologies
Sandra Costanzo,Alvaro Rocha,Marcelo Sampaio de Alencar
Journal of Electrical and Computer Engineering , 2014, DOI: 10.1155/2014/818369
Fertilization with Nitrogen, Phosphorus and Potassium in Upland Rice Cultivars in the Southern Region of Rond?nia, Brazil  [PDF]
Edimar Rodrigues Soares, Robertt Fernandes, Laércio da Silva Londero, Leandro Galon, Fabiana Ferreira Pires, Marcelo de Andrade Barbosa, Diego Lopes dos Santos, Samara Cristina Sampaio Correa, Everton Augusto Sampaio Correa, Remy Carvalho dos Santos
American Journal of Plant Sciences (AJPS) , 2015, DOI: 10.4236/ajps.2015.614229
Abstract: The upland rice productivity in the state of Rond?nia is still low, in view of the potential of culture. The use of cultivars adapted to different regions and more responsive to fertilizer employed is an essential practice which can change that. The aim of this study was to evaluate the agronomic characteristics and productivity of two upland rice cultivars with nitrogen, phosphorus and potassium (N-P-K) doses in two municipalities in the southern state of Rondonia region. The experimental design was a randomized block design with four replications in a factorial 2 × 2 × 5, with the first factor composed of two cultivars (hybrid Ecco and conventional farming AN Cambará), the second factor, the environment of the two municipalities, Cerejeiras and Vilhena and the third factor of five doses of N-P-K (0-0-0, 30-40-30, 60-60-60, 90-90-90 and 120-100-120 kg·ha-1). The characteristics evaluated were: tillering, number of integers and sterile grains per panicle, weight of 1000 grains, grain yield (kg·ha-1) and whole grain yield. There was no triple interaction between the three factors for any of the traits. The hybrid Ecco has higher tillering ability than AN Cambara and presents fewer sterile grains per panicle, heavier 1000 grains and hence greater productivity. For both cultivars, the highest yields are obtained with a dose of 120-100-120 kg·ha-1 N-P-K. For the Ecco, the productivity is achieved with this dose and the dose of 90-90-90 kg·ha-1 is statistically similar. There is no difference in productivity between the municipalities when the dose of N-P-K is less than 60-60-60 kg·ha-1. The highest yield of whole grains in function of N-P-K fertilization is obtained in Cerejeiras.
Bionutritional efficiency of crossbred beef cattle finished on feedlot andslaughtered at different body weights
Mello, Renius;Queiroz, Augusto César de;Faria, Marcelo Henrique de;Henrique, Douglas Sampaio;Maldonado, Fabiana;
Revista Brasileira de Zootecnia , 2010, DOI: 10.1590/S1516-35982010000300018
Abstract: the objective of this study was to assess the bionutritional efficiency of crossbred f1 red angus × nellore (? ra ? n) and f1 blonde d'aquitaine × nellore (? ba ? n) young bulls finished on feedlot and slaughtered at 480, 520 and 560 kg body weight. a completely randomized experimental design in a 2 × 3 (genetic group × slaughter weight) factorial arrangement with six replicates was used. the ? ba ? n young bulls showed higher kidney, pelvic and inguinal fat (kpif, kg and % bw) and lower multivariate biological nutritional index (mbni) and residual feed intake than ? ra ? n young bulls. the young bulls slaughtered at heavier weight had larger ribeye area (cm2), fat thickness over the 12-13th rib, fat thickness over the rump, kpif (kg and % bw), dry matter intake (dmi, kg/d), net energy intake (mj/d) and metabolizable protein intake (g/d), and mbni compared to young bulls slaughtered at lighter weight. furthermore, the ? ba ? n young bulls slaughtered at 480 kg had lower feed conversion than the others. on the other hand, the average daily weight gain (kg/d), dmi (% bw and g/bw0.75), feed efficiency and kleiber ratio did not differ between genetic group, slaughter weight and genetic group versus slaughter weight interaction. therefore, crossbred f1 blonde d'aquitaine × nellore young bulls and animals slaughtered at lighter weights are more bionutritionally efficient in the finishing phase on feedlot.
Gynecomastia: physiopathology, evaluation and treatment
Barros, Alfredo Carlos Sim?es Dornellas de;Sampaio, Marcelo de Castro Moura;
Sao Paulo Medical Journal , 2012, DOI: 10.1590/S1516-31802012000300009
Abstract: gynecomastia (gm) is characterized by enlargement of the male breast, caused by glandular proliferation and fat deposition. gm is common and occurs in adolescents, adults and in old age. the aim of this review is to discuss the pathophysiology, etiology, evaluation and therapy of gm. a hormonal imbalance between estrogens and androgens is the key hallmark of gm generation. the etiology of gm is attributable to physiological factors, endocrine tumors or dysfunctions, non-endocrine diseases, drug use or idiopathic causes. clinical evaluation must address diagnostic confirmation, search for an etiological factor and classify gm into severity grades to guide the treatment. a proposal for tailored therapy is presented. weight loss, reassurance, pharmacotherapy with tamoxifen and surgical correction are the therapeutic options. for long-standing gm, the best results are generally achieved through surgery, combining liposuction and mammary adenectomy.
Tabagismo e etilismo em funcionários da Universidade Estadual do Ceará
Sabry, Maria Olganê Dantas;Sampaio, Helena Alves de Carvalho;Silva, Marcelo Gurgel Carlos da;
Jornal de Pneumologia , 1999, DOI: 10.1590/S0102-35861999000600004
Abstract: the aim of the present study was to identify smoking and alcohol drinking practices among universidade estadual do ceará employees in the city of fortaleza. the study used 317 employees as subjects. an interview questionnaire containing personal, socioeconomic, tobacco and alcohol consumption data was applied. the tabulation and analysis were made by epi-info 6.0. 157 of the interviewed subjects were male and 160 were female, the most prevalent age bracket being 30-49 years of age, and high level of instruction. 146 workers showed a family income starting from 10 minimal living wages per month. 83 workers were considered smokers, and a higher prevalence was detected among males (56). mean tobacco consumption was 12.3 cigarettes a day, a practice that took place in the last 23.2 years. alcohol was ingested by 183 employees and the prevalence was also higher among males. the consumption occurred mainly on weekends or rarely. the most ingested drink was beer - 96, followed by brazilian white rum - 20 employees. the mean daily consumption of ethanol was 29.9 g. the ones who were both smokers and drinkers were mainly males. the instruction and income level were higher among smoking females and the income level was higher among drinking females. although the prevalence of tobacco and alcohol consumption was low, it is a risk of chronic-degenerative diseases, specially in relation to the ethanol ingested by males. it is necessary to continue this study to provide a deeper association among the different environmental variables.
In-flight collision avoidance controller based only on OS4 embedded sensors
Becker, Marcelo;Sampaio, Rafael Coronel B.;Bouabdallah, Samir;Perrot, Vincent de;Siegwart, Roland;
Journal of the Brazilian Society of Mechanical Sciences and Engineering , 2012, DOI: 10.1590/S1678-58782012000300010
Abstract: the major goal of this research was the development and implementation of a control system able to avoid collisions during the flight for a mini-quadrotor helicopter, based only on its embedded sensors without changing the environment. however, it is important to highlight that the design aspects must be seriously considered in order to overcome hardware limitations and achieve control simplification. the controllers of a uav (unmanned aerial vehicle) robot deal with highly unstable dynamics and strong axes coupling. furthermore, any additional embedded sensor increases the robot total weight and therefore, decreases its operating time. the best balance between embedded electronics and robot operating time is desired. this paper focuses not only on the development and implementation of a collision avoidance controller for a mini-robotic helicopter using only its embedded sensors, but also on the mathematical model that was essential for the controller developing phases. based on this model we carried out the development of a simulation tool based on matlab/simulink that was fundamental for setting the controllers' parameters. this tool allowed us to simulate and improve the os4 controllers in different modeled environments and test different approaches. after that, the controllers were embedded in the real robot and the results proved to be very robust and feasible. in addition to this, the controller has the advantage of being compatible with future path planners that we are developing.
Effectiveness of the actions of antimicrobial's control in the intensive care unit
Santos, Edilson Floriano dos;Silva, Antonio Emanuel;Pinhati, Henrique M. Sampaio;Maia, Marcelo de O.;
Brazilian Journal of Infectious Diseases , 2003, DOI: 10.1590/S1413-86702003000500002
Abstract: there are various strategies to improve the effectiveness of antibiotics in hospitals. in general, the implementation of guidelines for appropriate antibiotic therapy and the participation of infectious disease (id) physicians deserve considerable attention. this study was a prospective ecological time-series study that evaluates the effectiveness of the id physician's opinion to rationalize and control the use of antibiotics in medical-surgical intensive care units (icu), and the impact of their intervention on treatment expenditures. there was significant change in the pattern of use of antimicrobials, this pattern approximating that of a medical-surgical icu that participates in the icare (intensive care antimicrobial resistance epidemiology) project. for example, there was a significant increase in the consumption of antimicrobials of the ampicillin group (relative risk [rr]=3.39; 95% ci: 2.34-4.91) and antipseudomonal penicillins (rr=2.89; 95% ci: 1.70-4.92). on the other hand, there was a significant reduction in the consumption of 3rd/4th generation cephalosporins (rr=0.66; 95% ci: 0.57-0.77) and carbapenems (rr=0.43; 95% ci: 0.33-0.56). on average, for every patient-day antibiotic expense was reduced 37.2% during calendar year 2001, when compared with 2000. the id specialists' opinion and the adoption of guidelines for empirical antibiotic therapy of hospital-acquired pneumonia contributed to a reduction in the use of antimicrobials in medical-surgical icu. however, further studies that have more control over confounding variables are needed to help determine the relevance of these discoveries.
Análise temporal da permeabilidade da superfície urbana da sub-bacia do córrego centenário em Lavras, MG
Furtini, Marcelo Barbosa;Ferreira, Elizabeth;Sampaio, Fabrício de Menezes Telo;
Ciência e Agrotecnologia , 2007, DOI: 10.1590/S1413-70542007000400030
Abstract: over the past years, a series of studies have been undertaken by scientists of different areas, to assess the effects of urbanization on the hidrology of subbasins. the urbanization process has frequently been done alterations on the drainage of pluvial water. a gis data base containing the cadastral planiltimetric charts and aerial photographies allowed to study the land occupation in three different periods (1999, 1986 and 1971) of the centenário subbasin in lavras city, mg. so, the subject of this study was to realize a temporal analysis of the surface permeability of the centenário subbasin comparing the three periods. the urban surface permeability was avaibled by the analysis of the city's squares occupation per builted or paved area. the results permitted verify that the surface permeability downed from 1971 to 1999 years. in these years the urban area growed up avoiding the soil subbasin permeability. the conclusion that urbanization caused impacts on the subbasin was obvious, however the methodologies employed for the analysis in this work were too much efficient to determine the impacts of impervious surfaces.
Deslocamento miscível de nitrato e fosfato proveniente de água residuária da suinocultura em colunas de solo
Anami, Marcelo H.;Sampaio, Silvio C.;Suszek, Morgana;Gomes, Simone D.;Queiroz, Manoel M. F. de;
Revista Brasileira de Engenharia Agrícola e Ambiental , 2008, DOI: 10.1590/S1415-43662008000100011
Abstract: fertigation with wastewater from swine is very much used, mainly in the southern region of brazil. however, the high polluting potential of these wastewaters represents a threat of soil contamination of surface and underground waters if used in excessive amounts. the objective of this work was to evaluate the leaching process of nitrate and phosphate ions in soil columns, getting the hydrodynamic dispersion coefficient and factor of retardation and potential of contamination of underground water. the effect of wastewater application on physical and chemical properties of the soil was verified. the results showed that the potential for contamination of underground water by nitrate ions is high, in contrast to what occurs with phosphate ions that presented low potential of contamination due to their high reactivity.
Hipertens?o e obesidade em um grupo populacional no Nordeste do Brasil
SABRY, Maria Olganê Dantas;SAMPAIO, Helena Alves de Carvalho;SILVA, Marcelo Gurgel Carlos da;
Revista de Nutri??o , 2002, DOI: 10.1590/S1415-52732002000200002
Abstract: the aim of this study was to identify the prevalence of arterial hypertension and obesity, as well as their interrelationship, in 317 employees of a university in the city of fortaleza, in state of ceará. these employees were interviewed and anthropometric and arterial pressure data were collected. the parameters used to obtain and classify arterial pressure were the ones from the iii arterial hypertension brazilian consensus (1998) and from the joint national committee (1997). the body mass index was used to determine the nutritional classification, according to criteria from the world health organization (1995). it was found a prevalence of arterial hypertension of 25.6% and of overweight of 59.9%, both more prevalent in males (p<0.05). the obesity was a risk factor for arterial hypertension in the evaluated group (or 7.53; ic95 3.08-18.92; p=0.00). these results showed that the studied community needs health activities directed towards controlling chronic degenerative diseases.
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