oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2018 ( 3 )

2017 ( 6 )

2016 ( 8 )

2015 ( 25 )

Custom range...

Search Results: 1 - 10 of 2530 matches for " Silvana;Foresti "
All listed articles are free for downloading (OA Articles)
Page 1 /2530
Display every page Item
Aspectos biológicos de Argyrotaenia sphaleropa (Meyrick 1909) (Lepidoptera: Tortricidae) em dietas artificiais com diferentes fontes proteicas
Manfredi-Coimbra, Silvana;Garcia, Mauro Silveira;Loeck, Alci Enimar;Botton, Marcos;Foresti, Josemar;
Ciência Rural , 2005, DOI: 10.1590/S0103-84782005000200002
Abstract: biology aspects of argyrotaenia sphaleropa meyrick fed on artificial diets with different protein sources were studied: d1-white bean, wheat germ, soybean protein and casein; d2-common bean and yeast and d3-common bean, yeast and wheat germ, evaluating the duration and viability of all developmental stages (egg, larval, prepupa and pupa) and of the total cycle (egg-adult), sex ratio, pupa weight, fecundity, longevity and life table of fertility. tests were conducted in the laboratory at 25±1°c, 65±10% rh and 14h of photophase. duration of the egg stage was 6.6 days on all diets. the longest duration of larval and prepupal stages on d1 and pupal stages on d2, resulting in a longer duration of the total cycle on these two diets (30,9 and 30,8 days). the total viability was higher than 62% on all diets, and there was no statistical difference among the treatments. the number of instars was four or five on all treatments. the lowest fecundity was observed in d1. based on the fertility life table, d3 was the most suitable diet for rearing a. sphaleropa, due to the lowest development time (t), the highest finite increasing rate (l), and total viability exceeding 75%.
Efeito de dietas artificiais para a alimenta??o de adultos de Bonagota cranaodes (Meyrick) (Lepidoptera: Tortricidae), em laboratório
Fonseca, Fabiana Lazzerini da;Manfredi-Coimbra, Silvana;Foresti, Josemar;Kovaleski, Adalecio;
Ciência Rural , 2005, DOI: 10.1590/S0103-84782005000600001
Abstract: adults of bonagota cranaodes (meyrick) (lepidoptera: tortricidae) were maintained in cages of transparent pvc without food, with water, and fed with honey solution at 10% and with honey solution at 10% + 25% of beer only with water and without feeding to evaluate their fecundity, longevity and viability of eggs in growth to (25±1°c and 70±10% of ru). the longevity of females and males was longer and number of eggs/female were obtained in the mean substratum composed of honey at 10% (17,75 days, 17,35 days and 14,07 eggs/posture) and honey at 10% + 25% of beer (18,25 days, 18,20 days and 12,71 eggs/posture). the viability of the eggs and the duration of the embryonic period was similar in all the treatments. the mean with honey at 10% + 25% of beer, presented effects similar to the mean composed with honey at 10% regarding to the longevity, fertility and viability of eggs of b. cranaodes. however, due to the lower cost, the diet based only in honey represents the best choice in laboratory for maintenance rearing of this insect.
Efeito de dietas artificiais para a alimenta o de adultos de Bonagota cranaodes (Meyrick) (Lepidoptera: Tortricidae), em laboratório
Fonseca Fabiana Lazzerini da,Manfredi-Coimbra Silvana,Foresti Josemar,Kovaleski Adalecio
Ciência Rural , 2005,
Abstract: Adultos de Bonagota cranaodes (Meyrick) (Lepidoptera: Tortricidae) submetidos a tratamentos com água, solu o de mel a 10%, solu o de mel a 10% + 25% de cerveja e sem alimento foram mantidos em gaiolas de PVC transparente para avaliar a fecundidade, longevidade e viabilidade de ovos em laboratório a 25?1degreesC e 70?10% de UR. Maior longevidade de fêmeas e machos e número de ovos/fêmea foram obtidos nos substratos compostos de mel a 10% (17,75 dias, 17,35 dias e 14,07 ovos/postura) e mel a 10% + 25% de cerveja (18,25 dias, 18,20 dias e 12,71 ovos/postura). A viabilidade dos ovos e a dura o do período embrionário foram semelhantes em todos os tratamentos. O substrato alimentar mel a 10% + 25% de cerveja, apresentou efeitos semelhantes ao substrato composto de apenas mel a 10% sobre a longevidade, fertilidade e viabilidade dos ovos. Entretanto, devido ao menor custo, a dieta a base de mel apresenta melhor potencial de utiliza o para manuten o da cria o do inseto em laboratório.
APPLICATION OF THE ANAEROBIC SEQUENCING BATCH REACTORS WITH FIXED FILM IN THE TREATMENT OF INDUSTRIAL WASTEWATER CONTAINING HIGH SULFATE CONCENTRATION = APLICA O DE REATORES ANAERóBIOS OPERADOS EM BATELADAS SEQUENCIAIS COM FILME FIXO NO TRATAMENTO DE áGUA RESIDUARIA INDUSTRIAL RICA EM SULFATO
Arnaldo Sarti,Eugenio Foresti
Holos Environment , 2009,
Abstract: This paper presents and discusses the potential for use of pilot-scale anaerobic sequencing batch biofilm reactors (ASBBR) for the treatment of industrial wastewater containing high sulfate concentration. The pilot-scale ASBBR reactor (total volume=1.2 m3) containing biomass immobilized in inert support (mineral coal) was operated at sulfate loading rates varying from 0.15 to 1.90 kgSO4-2/cycle (cycle of 48h) corresponding to sulfate concentrations of 0.25 to 3.0 gSO4-2.L-1. Domestic sewage and ethanol were utilized as electron donors for sulfate reduction. The mean sulfate removal efficiencies remained in the range of 88 to 92% in the several sulfate concentrations obtained from 92 operational cycles. As post-treatment unit for the generated effluents by the sulfate reduction was used another reactor ASBBR in pilot-scale (total volume=385,0 L) with same inert support for biomass immobilization and different granulometry. The mean COD removal (mean influent=1450 mg.L-1) achieved 88% and total sulfide concentrations (H2S, HS , S2 ) remained in the range of 41 to 71 mg.L-1 during the 35 operational cycles of 48 h. The results demonstrated that the use of ASBBR reactors is an alternative potential for the sulfate removal and as post-treatment of generated effluent. = Este trabalho apresenta e discute o potencial de uso de reatores anaeróbios operados em bateladas seqüenciais com biomassa imobilizada (ASBBR), em escala piloto, no tratamento de água residuária industrial contendo elevadas concentra es de sulfato. No ASBBR, com volume total de 1,2 m3, preenchido com carv o mineral (meio suporte) foram aplicadas cargas de sulfato de 0,15 a 1,90 kg/ciclo com dura o de ciclo de 48 h, correspondendo, respectivamente, às concentra es de sulfato no afluente de 0,25 a 3,0 g.L-1. O esgoto sanitário e etanol foram usados como doadores de elétrons para a redu o do sulfato. As eficiências médias na redu o de sulfato ficaram entre 88 e 92% nos 92 ciclos operacionais. Como pós-tratamento dos efluentes gerados pela redu o de sulfato empregou-se outro reator ASBBR com volume total de 385,0 L e mesmo meio suporte para imobiliza o da biomassa, mas com diferente granulometria. A remo o média de DQO (valor médio afluente: 1450 mg.L-1) foi de 88%, enquanto as concentra es de sulfetos totais (H2S, HS , S2 ) mantiveram-se entre a faixa de 41 e 71 mg.L-1 nos 35 ciclos operacionais de 48h. Os resultados obtidos permitiram concluir que o uso de reatores ASBBR constitui-se em potencial alternativa tanto para a remo o de sulfatos, como no pós-tratamento dos efluentes gerados.
Acoustophoretic Waltz: a Contactless Exothermal Reaction
Daniele Foresti,Dimos Poulikakos
Physics , 2013, DOI: 10.1063/1.4893545
Abstract: The fluid dynamics video shows the acoustophoretic handling of a metal sodium chunks and a water droplets before, during and after mixing. The violent exothermal reaction between solid and liquid introduces an additional phase (hydrogen gas). We developed a unique concept for using ultrasound to stably levitated and move along a plane multiple objects in air, independently from their electromagnetic nature and aspect ratio. This contactless material handling can be extended to hazardous, chemical or radioactive samples.
Arquitetura da informa o em web site de periódico científico/Information architecture in a scientific journal web site
Maria Fernanda Sarmento e Souza,Miriam Celí Pimentel Porto Foresti,Silvana Aparecida Borsetti Gregorio Vidotti,Juan Manuel Pineda,Vilma Fernandes Neves,Glória Radino,Regina Célia Baptista Belluzzo,Maria Teresa Miceli Kerbauy,Sidney Reinaldo da Silva,Rosangela Carrilo Moreno
ETD : Educa??o Temática Digital , 2004,
Abstract: Investigam-se elementos da Arquitetura da Informa o à serem considerados em web site de periódico científico, descrevendo-se critérios de qualidade e variáveis que devem ser mantidos, a fim de garantir a permanência das fun es memória e dissemina o, inerentes ao processo de comunica o científica. Apresentam-se o ‘Modelo para análise de estrutura de periódicos científicos eletr nicos’ e um estudo descritivo e comparativo dos web site das revistas Ciência da Informa o On-line e DataGramaZero. Resultados apontam a Arquitetura da Informa o como uma área de estudos que poderá subsidiar bibliotecários, autores e leitores na identifica o de periódicos de qualidade, e editores no desenvolvimento de projetos de periódicos científicos eletr nicos. Information Architecture elements were investigated for consideration in a scientific journal web site, describing the quality criteria and variables which must be maintained to ensure the permanence of archival and dissemination functions, inherent in the scientific communication process. The ‘Model for analysis of the structure of electronic scientific journals’ with a descriptive and comparative study of Ciência da Informa o On-line and DataGramaZero web sites were presented. Results show Information Architecture as an area of study that may help librarians, authors, and readers identify quality periodicals, and editors develop scientific electronic journals. Keywords Comunica o Científica --- Ciência da Informa o --- Arquitetura de Informa o --- Periódico Científico Eletr nico --- Internet --- web site --- Scientific Communication --- Information Science --- Information Architecture --- Electronic Scientific Journal --- Internet --- web site
A Multimodal Learning System for Individuals with Sensorial, Neuropsychological, and Relational Impairments
Sergio Canazza,Gian Luca Foresti
Journal of Sensors , 2013, DOI: 10.1155/2013/564864
Abstract: This paper presents a system for an interactive multimodal environment able (i) to train the listening comprehension in various populations of pupils, both Italian and immigrants, having different disabilities and (ii) to assess speech production and discrimination. The proposed system is the result of a research project focused on pupils with sensorial, neuropsychological, and relational impairments. The project involves innovative technological systems that the users (speech terabits psychologists and preprimary and primary schools teachers) could adopt for training and assessment of language and speech. Because the system is used in a real scenario (the Italian schools are often affected by poor funding for education and teachers without informatics skills), the guidelines adopted are low-cost technology; usability; customizable system; robustness. 1. Introduction Learning systems providing user interaction within physical spaces have been carried out over the years. However the high cost and the high complexity of the technologies used have always implied that their use by pupils in real context was limited to occasional visits or short periods of experimentation. Our aim is to provide an interactive multimodal environment (developed in C++) that can be integrated with the ordinary educational activities within the school. For this purpose, we use common technologies—such as webcams, microphones, and Microsoft Kinect sensors—in order (i) to provide tools that allow teachers to adapt or create autonomously the educational activities content to be carried out with the system and (ii) to implement a user interface for the management software that does not require specific computer skills. Our system implements the five different types of interaction stated by Moreno and Mayer [1]: (1) dialogue, (2) control, (3) manipulation, (4) search, and (5) navigation. Indeed, these five levels are very familiar during the everyday learning activity. Here are some examples: (1) a comparison/oral discussion in which the exchange of information is not unilateral, but the opportunities to the students to ask questions and express their opinions are given influencing the content of the lesson; (2) oral exposure in which the student has the ability to control the speed and to stop the explanation in order to benefit from the educational content at their own pace; (3) a scientific experiment that leaves the possibility for the student to test different parameters and see what happens; (4) the ability to independently seek information on a certain subject within a
Simplifying Stochastic Mathematical Models of Biochemical Systems  [PDF]
Silvana Ilie, Samaneh Gholami
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.41A038
Abstract:

Stochastic modeling of biochemical reactions taking place at the cellular level has become the subject of intense research in recent years. Molecular interactions in a single cell exhibit random fluctuations. These fluctuations may be significant when small populations of some reacting species are present and then a stochastic description of the cellular dynamics is required. Often, the biochemically reacting systems encountered in applications consist of many species interacting through many reaction channels. Also, the dynamics of such systems is typically non-linear and presents multiple time-scales. Consequently, the stochastic mathematical models of biochemical systems can be quite complex and their analysis challenging. In this paper, we present a method to reduce a stochastic continuous model of well-stirred biochemical systems, the Chemical Langevin Equation, while preserving the overall behavior of the system. Several tests of our method on models of practical interest gave excellent results.

Automatic Simulation of the Chemical Langevin Equation  [PDF]
Silvana Ilie, Monjur Morshed
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.41A036
Abstract:

Biochemical systems have important practical applications, in particular to understanding critical intra-cellular processes. Often biochemical kinetic models represent cellular processes as systems of chemical reactions, traditionally modeled by the deterministic reaction rate equations. In the cellular environment, many biological processes are inherently stochastic. The stochastic fluctuations due to the presence of some low molecular populations may have a great impact on the biochemical system behavior. Then, stochastic models are required for an accurate description of the system dynamics. An important stochastic model of biochemical kinetics is the Chemical Langevin Equation. In this work, we provide a numerical method for approximating the solution of the Chemical Langevin Equation, namely the derivative-free Milstein scheme. The method is compared with the widely used strategy for this class of problems, the Milstein method. As opposed to the Milstein scheme, the proposed strategy has the advantage that it does not require the calculation of exact derivatives, while having the same strong order of accuracy as the Milstein scheme. Therefore it may be used for an automatic simulation of the numerical solution of the Chemical Langevin Equation. The tests on several models of practical interest show that our method performs very well.

Generational Change and the Military Dictatorship in Brazil: The Debate on the “AI-5 Generation”  [PDF]
Silvana Seabra Hooper
Creative Education (CE) , 2016, DOI: 10.4236/ce.2016.715226
Abstract: This article analyzes the issue of generational change, reviews its conceptual and historical origin in Mannheim and demonstrates the relationship between generational cohorts and traumatic historical moments. The paper focuses on a new generation in Brazil, the “AI-5 generation” (1970), which was identified by Luciano Martins (social scientist), and subsequently reconsidered by Jurandir Freire Costa (social psychanalyst). It discusses one possible reinterpretation of the concept within the context of the internationalization and modernization of that period in Brazil.
Page 1 /2530
Display every page Item


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