Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Any time

4 ( 1 )

2020 ( 1 )

2019 ( 53 )

2018 ( 80 )

Custom range...

Search Results: 1 - 10 of 29027 matches for " Anderson Mathias;Gon?alves "
All listed articles are free for downloading (OA Articles)
Page 1 /29027
Display every page Item
Características biológicas de linhagens de Trichogramma pretiosum, criados em ovos de Sitotroga cerealella e Anagasta kuehniella
Pratissoli, Dirceu;Holtz, Anderson Mathias;Gonalves, José Roberto;Oliveira, Regiane Cristina de;Vianna, Ulysses Rodrigues;
Horticultura Brasileira , 2004, DOI: 10.1590/S0102-05362004000300012
Abstract: the biological characteristics of five lineages of t. pretiosum riley (hym.: trichogrammatidae), collected from tomato crops, and reared in a. kuehniella (zeller) and s. cerealella (olivier) eggs were evaluated. the parasitism rate of the lineages, varied from 56,1 to 68.6%, when the host was a. kuehniella, being higher than for s. cerealella. the viability of all lineages, when reared in s. cerealella eggs, was superior to 90%; however, only those lineages reared in s. cerealella eggs and collected in afonso cláudio and venda nova dos imigrantes (espirito santo state, brazil) were significantly higher than those reared on a. kuehniella. the longevity of the offspring submitted to the parasitism, was higher in all the lineages reared in a. kuehniella eggs. all five lineages can be mass reared using both hosts. however, considering the parasitism rate and the quality of the progeny, the host a. kuehniella seems to be superior than s. cerealella
Single-Phase Velocity Determination Based in Video and Sub-Images Processing: An Optical Flow Method Implemented with Support of a Programmed MatLab Structured Script  [PDF]
Andreas Nascimento, Edson Da Costa Bortoni, José Luiz Gonalves, Pedro Antunes Duarte, Mauro Hugo Mathias
Journal of Software Engineering and Applications (JSEA) , 2015, DOI: 10.4236/jsea.2015.86029
Abstract: Important in many different sectors of the industry, the determination of stream velocity has become more and more important due to measurements precision necessity, in order to determine the right production rates, determine the volumetric production of undesired fluid, establish automated controls based on these measurements avoiding over-flooding or over-production, guaranteeing accurate predictive maintenance, etc. Difficulties being faced have been the determination of the velocity of specific fluids embedded in some others, for example, determining the gas bubbles stream velocity flowing throughout liquid fluid phase. Although different and already applicable methods have been researched and already implemented within the industry, a non-intrusive automated way of providing those stream velocities has its importance, and may have a huge impact in projects budget. Knowing the importance of its determination, this developed script uses a methodology of breaking-down real-time videos media into frame images, analyzing by pixel correlations possible superposition matches for further gas bubbles stream velocity estimation. In raw sense, the script bases itself in functions and procedures already available in MatLab, which can be used for image processing and treatments, allowing the methodology to be implemented. Its accuracy after the running test was of around 97% (ninety-seven percent); the raw source code with comments had almost 3000 (three thousand) characters; and the hardware placed for running the code was an Intel Core Duo 2.13 [Ghz] and 2 [Gb] RAM memory capable workstation. Even showing good results, it could be stated that just the end point correlations were actually getting to the final solution. So that, making use of self-learning functions or neural network, one could surely enhance the capability of the application to be run in real-time without getting exhaust by iterative loops.
Exercício rosca bíceps: influência do tempo de execu??o e da intensidade da carga na atividade eletromiográfica de músculos lombares
Oliveira,Anderson; Gonalves,Mauro; Cardozo,Adalgiso; Barbosa,Fernando;
Revista Portuguesa de Ciências do Desporto , 2006,
Abstract: the purpose of this study was to verify the effect of execution time, load level and contraction type in the electromyographic activity of longissimus thoracis muscle bilaterally, during the execution of the biceps curl exercise. ten healthy subjects performed the exercise until exhaustion with 25%, 35% and 45% of one repetition maximum (rm), in three different days. root mean square and slope were analyzed in each 10% of total time. results showed a progressive increase in electromyographic activity with time, at 25% and 35% of 1rm with significant increases in the electromyographic activity beginning at 80% of execution time. the effect of load level in the activity of longissimus thoracis muscles occurred in the concentric phase between 25% and 45% of rm. there was a predominantly effect of contraction type at 45% of 1-rm for both muscles, and was found a small effect of contraction type for slope values. these results allow to conclude that the performance of biceps curl exercise increases the electromyographic activity of longissimus thoracis muscles during the concentric elbow movements and at 80% of execution time.
Orthodontic treatment need for Brazilian schoolchildren: a study using the Dental Aesthetic Index
Anderson Barbosa de Almeida,Isabel Cristina Gonalves Leite
Dental Press Journal of Orthodontics , 2013,
Abstract: OBJECTIVE: To determine the normative orthodontic treatment need among 12-year-old Brazilian schoolchildren, in the municipality of Juiz de Fora, Minas Gerais, Brazil, and compare with the need as perceived by the children themselves and their parents or caregivers, assessing putative associated sociodemographic factors. METHODS: Four hundred and fifty one children without a previous history of orthodontic treatment were randomly selected from a population of 7,993 schoolchildren regularly attending the public and private educational sectors of the municipality of Juiz de Fora, Minas Gerais, Brazil. RESULTS: The prevalence of normative orthodontic treatment need in 12-year-old children, assessed with the Dental Aesthetic Index (DAI) was 65.6% (n = 155). The need perceived by the caregivers was 85.6%, and by the children was 83.8%. Only the perception by the caregivers maintained a significant correlation with the normative need of treatment when adjusted to the parents' schooling and economical level (p = 0.023). CONCLUSIONS: There is a high prevalence (65.6%) of malocclusion requiring orthodontic treatment in 12-year-old Brazilian schoolchildren. The most prevalent malocclusions in the study were: Crowding, Class II molar relationship and increased overjet. There was no significant correlation between the Index of Orthodontic Treatment Need - Aesthetic Component (IOTN-AC) related to dental aesthetic perception and the normative treatment need assessed with the DAI. OBJETIVO: determinar a necessidade normativa de tratamento ortod ntico em escolares brasileiros de 12 anos de idade, no município de Juiz de Fora, Minas Gerais, e compará-la à necessidade percebida pelos responsáveis e crian as da amostra, avaliando potenciais fatores sociodemográficos associados. MéTODOS: quatrocentos e cinquenta e uma crian as, sem história de tratamento ortod ntico, foram selecionadas, aleatoriamente, de uma popula o de 7.993 escolares matriculados na rede de ensino pública e particular da cidade de Juiz de Fora. RESULTADOS: a prevalência da necessidade normativa de tratamento ortod ntico em crian as de 12 anos de idade, utilizando o índice de Estética Dentária (DAI), foi de 65,6% (n = 155). A percep o da necessidade pelos responsáveis foi de 85,6% e pelas crian as foi de 83,8%. No entanto, somente a percep o dos responsáveis teve uma correla o significativa com a necessidade normativa (p = 0,023). CONCLUS ES: existe uma alta prevalência (65,6%) de má oclus o com necessidade de tratamento ortod ntico em escolares brasileiros de 12 anos de idade. As más oclus es mais p
Fast, parallel and secure cryptography algorithm using Lorenz's attractor
Anderson Gonalves Marco,Alexandre Souto Martinez,Odemir Martinez Bruno
Computer Science , 2012, DOI: 10.1142/S0129183110015166
Abstract: A novel cryptography method based on the Lorenz's attractor chaotic system is presented. The proposed algorithm is secure and fast, making it practical for general use. We introduce the chaotic operation mode, which provides an interaction among the password, message and a chaotic system. It ensures that the algorithm yields a secure codification, even if the nature of the chaotic system is known. The algorithm has been implemented in two versions: one sequential and slow and the other, parallel and fast. Our algorithm assures the integrity of the ciphertext (we know if it has been altered, which is not assured by traditional algorithms) and consequently its authenticity. Numerical experiments are presented, discussed and show the behavior of the method in terms of security and performance. The fast version of the algorithm has a performance comparable to AES, a popular cryptography program used commercially nowadays, but it is more secure, which makes it immediately suitable for general purpose cryptography applications. An internet page has been set up, which enables the readers to test the algorithm and also to try to break into the cipher in.
2.7 Influência do nível d’água e sua varia o no crescimento e na morfologia de caules da macrófita aquática Eleocharis equisetoides numa lagoa costeira
Anderson R. Gripp,Fabrício A. Gonalves,Anderson M. dos Santos,Francisco A. Esteves
Boletim do Observatório Ambiental Alberto Ribeiro Lamego , 2010,
Structural and Production Characteristics of Piat? Grass Forage Submitted to Levels of Nitrogen  [PDF]
Ronaldo Liberato Dourado, Alexandre Lima de Souza, Anderson de Moura Zanine, Fabio Luiz Buranelo Toral, Daniele de Jesus Ferreira, Joadil Gonalves de Abreu
American Journal of Plant Sciences (AJPS) , 2015, DOI: 10.4236/ajps.2015.65075
Abstract: Piatã grass (Brachiaria brizantha cv. Piatã) is a tropical grass cultivating in pasture production system. The aim of this study was to evaluate the effects of nitrogen levels (0, 125, 250, 375 and 500 kg·N·ha-1) on structural characteristics and forage production of Piatã grass. The experiment comprised of twenty grass parcels arranged in randomised completely casualties design. This study was carried out between November of 2007 and April of 2008, with 175 experimental days. A quadratic effect (P < 0.05) was verified for nitrogen dosage on canopy height, final leaf blade length and leaf area index. Nitrogen fertilisation altered the population density of tillers, with estimated maximum value of 955 tillers·m-2 at a nitrogen dose of 357 kg·ha-1. A quadratic effect (P < 0.05) was also verified for nitrogen levels on the production of total and green leaf blade dry matter, with estimated maximum values of 19,253 and 11,548 kg·ha-1·year-1?for nitrogen levels of 411 and 384 kg·ha-1, respectively. However, a considerable portion of forage production obtained by nitrogen addition occurred from stem production. The productions of green leaf blade dry matter, tiller density, leaf blade length and leaf blade index are all variables related to structural aspects and pasture quality, with all attaining their highest values at a mean nitrogen application level of 380 kg·ha-1.
Effect of bean genotypes, insecticides, and natural products on the control of Bemisia tabaci (Gennadius) biotype B (Hemiptera: Aleyrodidae) and Caliothrips phaseoli (Hood) (Thysanoptera: Thripidae) = Efeito de genótipos de feijoeiro, inseticida e produtos naturais no controle Bemisia tabaci (Gennadius) biotipo B (Hemiptera: Aleyrodidae) e Caliothrips phaseoli (Hood) (Thysanoptera: Thripidae)
Júlio Cesar Janini,Arlindo Leal Boi?a Júnior,Flávio Gonalves Jesus,Anderson Gonalves Silva
Acta Scientiarum : Agronomy , 2011,
Abstract: Effect of bean genotypes, insecticides, and natural products on the control of Bemisia tabaci (Gennadius) biotype B (Hemiptera: Aleyrodidae) and Caliothrips phaseoli (Hood) (Thysanoptera: Thripidae). The influence of bean genotypes associated with neem oil as insecticide was evaluated to control B. tabaci (Gennadius) biotype B and C. phaseoli (Hood) during the wet season sowing. The experimental design used was the randomized block arrangement in a 4x4x3 factorial scheme, represented by genotypes, neem oil and insecticides respectively, with three replications. The genotypes Carioca, IAC Harmonia, IAC Centauro and Pérola were used. The evaluations were done at 14 and 42 days after seedling emergence, bycounting B. tabaci biotype B eggs and nymphs and C. phaseoli nymphs in the genotypes leaf. Conclusion: The B. tabaci biotype B eggs and nymphs number were smaller in IAC Centauro and higher in IAC Harmonia. The tested genotypes were similarly infested by C. phaseoli. IAC Centauro and IAC Harmonia genotypes associated with neem oil (highlighting the full dose – 1%) provided lower number of whitefly eggs and thrips nymphs. Neem oil at the full dose alsoreduced whitefly nymph number. In the tested genotypes the insecticide provided reduction in the number of whitefly eggs and nymphs as well in the thrips nymphs, with increase in therecommend dose. Avaliou-se a influência de genótipos de feijoeiro associado à aplica o de óleo de nim e inseticida no controle de B. tabaci (Gennadius) biótipo B e C. phaseoli (Hood) na época de semeadura “das águas”. O delineamento experimental utilizados foi o de blocos casualizados dispostos em um esquema fatorial 4 x 3 x 3, representado por variedades, óleo de nim e inseticidas, respectivamente, com três repeti es. Utilizaram-se os genótipos Carioca, IAC Harmonia, IAC Centauro e Pérola. As avalia es foram realizadas dos 14 aos 42 dias após a emergência das plantas, contando-se o número de ovos e ninfas de B. tabaci biótipo B e ninfas de C. phaseoli nos folíolos dos genótipos. Concluiu-se: o número de ovos e ninfas de B. tabaci biótipo B foi menor em IAC Centauro e maior em IAC Harmonia. Osgenótipos testados foram igualmente infestados por C. phaseoli. IAC Centauro e IAC Harmonia associado ao óleo de nim e com destaque a dose cheia (1,0%), propiciaram menor número de ovos de mosca branca e de ninfas tripes, e o último deles atuou reduzindo o número de ninfas de mosca branca. Nos genótipos testados o inseticida proporcionou redu o no número de ovos e ninfas de mosca branca e de ninfas de tripes, com incremento na dose recome
Resistência de variedades de algod?o ao curuquerê do algodoeiro Alabama argillacea Hubner (lepidoptera: noctuidae)
Junior, Arlindo Leal Boi?a;Jesus, Flávio Gonalves de;Janini, Julio César;Silva, Anderson Gonalves da;Alves, Gleina Costa Silva;
Revista Ceres , 2012, DOI: 10.1590/S0034-737X2012000100007
Abstract: this work aimed to test the occurrence of types of resistance in cotton varieties (gossypium hirsutum l.) including non-preference to oviposition and feeding and antibiosis to alabama argillacea (hubner, 1818), in laboratory experiments (27±2 oc, 70±10% de r.h. and photophase of 14 hours). the experiment to evaluate the non-preference for oviposition and feeding in free choice tests used a randomized block design, while the tests without free choice used a completely randomized design. to evaluate antibiosis, leaves of the varieties deltaopal, nuopal, fmt 701, fmx 910 e fmx 996 were fed to the larvae daily. the duration of each insect phase, the larvae mass in the 10th day, the pupa mass with 24 hours, the larva and pupa stage, the adult longevity, total viability and fecundity were recorded. the varieties nuopal and fmt 701 showed resistance by non-preference for feeding. the varieties nuopal, fmt 701 and fmx 910 showed resistance by antibiosis to a. argillacea.
Argilominerais da Forma??o Codó (Aptiano Superior), Bacia de Grajaú, nordeste do Brasil
Gonalves,Daniele Freitas; Rossetti,Dilce de Fátima; Truckenbrodt,Werner; Mendes,Anderson Concei??o;
Latin American journal of sedimentology and basin analysis , 2006,
Abstract: this work combines facies, stratigraphy, x-ray diffraction, sem and petrographic analyses in order to investigate argillaceous rocks of the codó formation exposed in the codó and grajaú areas, northeastern brazil (fig. 1). the main goal is to characterize the clay mineral assemblage and record its variability along the depositional cycles in the attempt to discuss its origin and test its applicability as paleoclimatic and paleoenvironmental proxy indicators. the codó formation records the upper aptian deposition of the grajaú basin, a tectonically subsiding structure originated during the early stages of rifting that culminated with the opening of the south atlantic ocean along the equatorial brazilian margin (aranha et al., 1990). this basin has been interpreted as a unique structure consisting of an intracontinental semi-graben, which was formed by combination of pure shear stress and strike-slip deformation (góes and rossetti, 2001). the sedimentary successions of this basin include three depositional sequences, designated as s1, s2 and s3 (rossetti, 2001; fig. 2), with the first including the codó formation studied herein. the codó formation records a depositional system dominated by closed and hypersaline lakes and sabkhasalt pan complex (paz, 2000; paz & rossetti, 2001; paz & rossetti, 2005a). in the codó area, these deposits encompass a 25 m-thick prograding lacustrine succession arranged as shallowing-upward cycles that are attributed to central, transitional, and marginal lake facies associations. central lake deposits include mostly evaporites and bituminous black shales. transitional lake deposits consist of green to grey shales interbedded with limestones (lime-mudstone, laminated to massive peloidal wackestone to packstone and sparstone) formed in more oxygenated waters relative to the central lake deposits. marginal lake deposits include massive and indurated pelite with brownish-red colours, fenestral calcarenite of calcite grains, ostracodal wackesto
Page 1 /29027
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.