Alphitobius diaperinus spp como veiculador de Clostridium perfringens em granjas avícolas do interior paulista - Brasil

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Problemas e modelos que contribuíram com o desenvolvimento do cálculo diferencial e integral: dos gregos à Newton

This article refers to a research which tries to historically (re)construct the conceptual development of the Integral and Differential calculus, taking into account its constructing model feature, since the Greeks to Newton. These models were created by the problems that have been proposed by the history and were being modified by the time the new problems were put and the mathematics known advanced. In this perspective, I also show how a number of nature philosophers and mathematicians got involved by this process. Starting with the speculations over scientific and philosophical natures done by the ancient Greeks, it culminates with Newton s work in the 17th century. Moreover, I present and analyze the problems proposed (open questions), models generated (questions answered) as well as the religious, political, economic and social conditions involved. This work is divided into 6 chapters plus the final considerations. Chapter 1 shows how the research came about, given my motivation and experience. I outline the ways I have gone trough to refine the main question and present the subject of and the objectives of the research, ending the chapter showing the theoretical bases by which the research was carried out, naming such bases as Investigation Theoretical Fields (ITF). Chapter 2 presents each one of the theoretical bases, which was introduced in the chapter 1 s end. In this discuss, I try to connect the ITF to the research. The Chapter 3 discusses the methodological choices done considering the theoretical fields considered. So, the Chapters 4, 5 and 6 present the main corpus of the research, i.e., they reconstruct the calculus history under a perspective of model building (questions answered) from the problems given (open questions), analyzing since the ancient Greeks contribution (Chapter 4), pos- Greek, especially, the Romans contribution, Hindus, Arabian, and the contribution on the Medium Age (Chapter 5). I relate the European reborn and the contribution of the philosophers and scientists until culminate with the Newton s work (Chapter 6). In the final considerations, it finally gives an account on my impressions about the development of the research as well as the results reached here. By the end, I plan out a propose of curse of Differential and Integral Calculus, having by basis the last three chapters of the article

O desafio da parceria na implementação do PRONERA: o caso do projeto alfabetização cidadã no nordeste Paraense.

El desafío de la parcería en la implantación del PRONERA: el caso del Proyecto Alfabetización Ciudadana en Noreste de Pará se constituye en un estudio sobre las políticas públicas de educación del campo. El trabajo tiene como objeto de análisis la implantación del PRONERA, a partir del estudio de caso del Proyecto de Alfabetización Ciudadana en Noreste de Pará, con el objetivo de comprender como la parcería, principio operacional y metodológico propuesto por el PRONERA, se concretó en la implantación del Proyecto y cuales sus posibles implicaciones en las políticas públicas de educación del campo. Entre los procedimientos metodológicos, realizamos la investigación bibliográfica y documental que nos permitieron situar la educación del campo en términos históricos y políticos, sistematizar la constitución y la organización del PRONERA y reflexionar acerca de la parcería a partir de diferentes ópticas. Realizamos también la investigación de campo por medio de entrevistas semi-estructuradas, con el propósito de analizar la implantación del Proyecto da Alfabetización Ciudadana, a partir del dialogo con los actores sociales involucrados. Los resultados de las análisis indicaron que, históricamente, las políticas públicas de educación destinadas a las poblaciones de la zona rural fueron instituidas verticalmente, desvinculadas de la realidad del campo e incompatibles con las necesidades e intereses de los sujetos. Constatamos que, en período reciente, movimientos sociales del campo reivindican y proponen acciones que se establezcan como políticas públicas de educación del campo. Identificamos que el PRONERA resulta de ese movimiento y se presenta como anuncio de una política pública de educación del campo, teniendo como diferencial el hecho de ser un programa del gobierno federal idealizado fuera de la esfera gubernamental, construido por los movimientos sociales del campo y presentar, entre otras innovaciones, el modelo de parcería y la gestión compartida, participativa y democrática. En esta perspectiva, en este estudio de caso, se evidenció que la parcería, frente a los conflictos y las disputas entre sus miembros participantes, no es el problema de la implantación del PRONERA, sino su punto fuerte. De este modo, la parcería es uno de los elementos necesarios para la construcción de políticas públicas, en particular, de educación del campo, una vez que posibilita la interacción de instituciones públicas y movimientos sociales locales, atribuyendo legitimidad a la educación del campo. Al promover un proceso de aprendizaje democrático, la parcería se presenta como estrategia de democratización de la educación del campo.

Desenvolvimento folicular de embriões de frangos de corte de diferentes genótipos expostos ao estresse térmico crônico

O objetivo do trabalho foi avaliar as alterações tegumentares (morfogênese da pena), em embriões de frangos de corte de linhagens de diferentes padrões de crescimento, obtidos de ovos incubados sob diferentes temperaturas. Os ovos foram obtidos de matrizes das linhagens Cobb 500 e ISA JA57, distribuídos proporcionalmente em três incubadoras. do primeiro (D1) ao sexto dia (D6) de incubação, utilizou-se uma temperatura padrão (37,8°C). A partir do sétimo dia (D7) e até o momento do nascimento aos 21 dias (D21), uma das incubadoras teve a temperatura reduzida para 36,8°C (fria) e uma outra alterada para 38,8°C (quente). A terceira incubadora foi mantida a 37,8°C (controle). O delineamento adotado foi o inteiramente casualizado, em esquema fatorial 3 x 2 (temperatura de incubação e linhagem). A temperatura de incubação e a linhagem não alteraram a densidade dos folículos da pena (número médio de folículos por área de 337,5µm²) nas regiões femural e dorsopélvica dos embriões até os 11 dias (D11). Entretanto, observou-se aumento na densidade folicular na região dorsal dos embriões aos 16 dias (D16) devido ao aumento da temperatura, permanecendo até o momento do nascimento. É possível oncluirque embriões incubados em temperatura acima da recomendada (38,8°C) apresentam uma maior densidade de folículos na região dorsopélvica. Apesar disso, a morfogênese dos folículos permaneceu inalterada.

Desenvolvimento gonadal de fêmeas de matrinxã, Brycon amazonicus, submetidas a restrição alimentar

O presente estudo avaliou o efeito de ciclos de restrição alimentar e realimentação (2/3 dias), aplicados durante seis meses antes da desova, no desenvolvimento gonadal de matrinxã. Na ocasião da desova, fêmeas alimentadas diariamente e submetidas ao regime alimentar experimental, selecionadas para a indução hormonal, foram sacrificadas para retirada das gônadas e do fígado, com os quais se calculou o IGS (índice gonadossomático) e o IHS (índice hepatossomático), sendo os ovários processados para análise histológica. Não houve alteração no peso relativo dos ovários e fígado, e o desenvolvimento gonadal não foi afetado pelo esquema alimentar. Os valores de IGS foram de 5,09±4,98% e 9,79±4,17% e os de IHS foram de 0,84±0,07% e 0,91±0,11%, para as fêmeas controle e experimentais, respectivamente, sem diferenças significativas entre os grupos. Os ovários de peixes dos dois grupos apresentaram as mesmas características do estádio maduro, com predominância de ovócitos na fase final de maturação, repletos de vitelo. O estudo indica que a restrição alimentar não afetou a preparação das fêmeas para a reprodução e que ciclos adequados de restrição e realimentação poderão ser aplicados na criação do matrinxã, assegurando menores custos de produção.

A escola rural e o desafio da docência em salas multisseriadas: o caso do seridó norteriograndense

Uno de los principales desafíos colocados a la educación del medio rural está relacionado a la enseñanza de las escuelas rurales con salas multifacéticas. Estas comprehenden alumnos de diferentes comunidades, series, edades, aprendizaje y niveles de conocimientos. Son cursos heterogéneos, que tienen como característica central la diversidad. En muchas regiones rurales de Brasil, la educación escolar es organizada en cursos multifacéticos debido a las grandes distancias entre las comunidades y el bajo número de alumnos en cada serie/año. Es común encontrar a los que están en fase de alfabetización estudiando con quien ya sabe leer y escribir - y todos sobre la orientación de apenas una profesora, que necesita enseñar a partir del contexto y la cultura local. El punto principal a ser tratado en este estudio está relacionado a las prácticas ejercidas en la acción educativa de las profesoras que actúan en escuelas rurales con salas multifacéticas de la región del Seridó do Rio Grande do Norte, precisamente en los municipios de Caicó, Jardim do Seridó y Ouro Branco. Creemos que este es uno de los puntos centrales en la discusión sobre la organización de la educación en el medio rural con fuertes implicaciones para el atendimiento cualificado de la población en condiciones de escolaridad de ese medio. Las contribuciones de Werthein y Bordenave, Calazans, Paiva, Ramalho, Therrien y Damasceno, Leite, Passador, Molina, Arroyo, Nascimento, Hage, además de documentos oficiales del MEC, como cuadernos SECAD, Ley de Directrices y Bases de la Educación Nacional, Directrices Operacionales para la Implantación de la Enseñanza Básica de 9 (nove) años, Proyecto Base del Programa Escuela Activa, entre otros, fundamentaron el análisis sobre la escuela rural y el desafío de la docencia en salas multifacéticas en el contexto del Seridó norteriograndense. El estudio envolvió 24 (veinticuatro) profesoras y 06 (seis) profesionales de la educación que desempeñan sus funciones en los Centros Municipales de Enseñanza Rural (CMER). Los instrumentos de investigación empleados fueron cuestionarios y observaciones aplicados para responder a las siguientes preguntas: ¿cómo se estructura la escuela rural con salas multifacéticas? ¿Cómo las profesoras se posicionan sobre su trabajo en salas multifacéticas esto es, como las concibe en el contexto de la educación rural del Seridó? ¿Qué opinan sobre la formación recibida para actuar en salas multifacéticas? Las profesoras y los/las profesionales de los CMER poseen en general formación superior en pedagogía, sin embargo, presentan limitaciones delante de las situaciones surgidas en el día a día de la sala de clases. El estudio revela que son las deficiencias de las políticas sociales y educacionales de formación docente, el bajo apoyo didáctico-pedagógico, reforzadas por la ausencia de un plano de carrera que dignifique el trabajo docente en ese medio, que generan limitaciones en el desarrollo profesional del magisterio rural, claramente junto a los docentes que actúan en salas multifacéticas en los municipios investigados

O desenvolvimento da docência nas engenharias: um estudo na universidade federal de campina grande (UFCG)

This research has the objective of studying the teacher-engineers awareness regarding their teaching practice of courses Civil, Electrical and Materials at the Federal University of Campina Grande. It presents and analyses major themes concerning the teaching work. At the same time, it pinpoints the need to develop good teaching practice in higher education. The study is based on the concepts of bricolage (KINCHELOE; BERRY, 2007) and multi-referentiality (ARDOINO, 1998). The Case Study procedure was adopted as an investigation strategy (YIN, 2004; AFONSO, 2005). The data collection was done through the application of questionnaires based on the teacher education paradigms (ZEICHNER, 1983; SACRISTAN, 1998; ALTET, 2001; BRÜTTEN, 2008). The theoretical background for the thematic axis is oriented by reflections on university teaching (MASETTO, 2003; 2007; ZABALZA, 2004; CUNHA et al, 2005; GRILLO, 2008; PIMENTA; ANASTASIOU, 2010 ); on Engineering teaching (BAZZO, 2001; MASETTO, 2009) and on the present-day relationship between educational policies and higher education (MENEZES, 2001; SANTOS, 1995;2005; BOSI, 2007). The data analysis was done by means of a quantitative and qualitative approach (SAMPIERI; COLLADO; LUCIO, 2006), allow us to understand how the teachers surveyed live their professional activity. The results make it possible to generalize that the teacher-engineers give value to research as part of their teacher education and they view the university pedagogy as an important aspect to improve their practice. A considerable number of them is interested in being part of reflection groups, aiming to enhance teaching at higher education. The teacher-engineers dedicate themselves to university teaching without sharing their experience with other teachers, consolidating a present tendency seen in the international and national literature. They tend to apply a pedagogy originated from their daily teaching practice, because they believe that teaching is perfected through practice, though they admit that practice alone is not sufficient for professional development. In the view of most informants, good teaching requires willingness, along with the political element, the mastery of the lesson contents and familiarity with the discipline objectives, if we regard teachers as advisors in the educational process. Throughout the teaching process, the teachers use diversified pedagogical strategies, such as contextualization and exemplification of the lesson contents, epistemological basis in the scientific field, and group work. They do not share any bond of relationship between them and the students, though they consider it important. In general terms, they lack preparation for university teaching and no involvement or interest in institutional issues, by supporting and improving the teaching quality

Survey for Tick-Borne Zoonoses in the State of Espirito Santo, Southeastern Brazil

Blood samples collected from 201 humans, 92 dogs, and 27 horses in the state of Espirito Santo, Brazil, were tested by polymerase chain reaction, indirect immunofluorescence assays, and indirect enzyme-linked immunosorbent assay for tick-borne diseases (rickettsiosis, ehrlichiosis, anaplasmosis, borreliosis, babesiosis). Our results indicated that the surveyed counties are endemic for spotted fever group rickettsiosis because sera from 70 (34.8%) humans, 7 (7.6%) dogs, and 7 (25.9%) horses were reactive to at least one of the six Rickettsia species tested. Although there was evidence of ehrlichiosis (Ehrlichia canis) and babesiosis (Babesia cams vogeli, Theileria equi) in domestic animals, no human was positive for babesiosis and only four individuals were serologically positive for E. canis. Borrelia burgdorferi-serologic reactive sera were rare among humans and horses, but encompassed 51% of the canine samples, suggesting that dogs and their ticks can be part of the epidemiological cycle of the causative agent of the Brazilian zoonosis, named Baggio-Yoshinari Syndrome.

Descompassos nas políticas educacionais: a reorganização da educação rural em Jardim de Piranhas/RN

The present work has as aim to analyze the reorganization process of the rural education in Jardim de Piranhas-RN, on the context of the education policies, in particular of the period of 1999-2006, having as reference the transformations in the political, cultural and socio-economic setting in the national, regional and local level, above all from the decade of 1990. The studies carried out in diverse sources made possible to understand from the context in which they had developed the education policies, in particular, that one directed for the rural way, as well as the mediation of this with the education reorganization in the local scope. Besides these research procedures, we carry out interviews - semi-structuralized - with managers and teachers, and we analyze documents from the produced ones in national level to those local ones. From the viewpoint theoretician-methodological, we focus the national discussion that comes developing under a new ideological political configuration and, being entitled by the Field Education, understood as a policy directed to education specifities in this sector and consolidated in the Operational Guidelines for the Basic Education in the Field Schools (CNE/MEC/2002). As particularity of this object in Jardim de Piranhas-RN, we emphasize events occurred that had marked the rural education reorganization in that city, especially from the creation of the Rural Education named Center Teacher Maria Edite Batista. Studies make possible to realize that until the Center creation, the schools functioned in rather precarious infrastructure and physical conditions, that is, without electric energy and water supplying, as well as the lack of school snack and the management structure. There was not a project or specific pedagogical accompaniment for the sector. Moreover, the teachers worked predominantly with several grade classes and still they fulfilled the manager functions, caretakers, and cook- in some cases as school secretary. However, exactly with the creation of the Rural Education Center, the education municipal system did not become capable to overcome problems as of the evasion and school failure, as well as decreasing the work overload of teachers, neither to give greater consistency to the pedagogical project of the field schools in that city

Seroprevalence of anti-Leishmania spp. antibodies in rural dogs from the city of Monte Negro, State of Rondônia, Brazil

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Desenvolvimento inicial no campo de pessegueiros 'Aurora-1' enxertados em clones de umezeiro e 'Okinawa' propagados por estacas herbáceas

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Degradação in vitro de tecidos da lâmina foliar e do colmo de gramíneas forrageiras tropicais, em função do estádio de desenvolvimento

O experimento foi realizado com o objetivo de avaliar o efeito da idade sobre o potencial de degradação dos diferentes tecidos da lâmina foliar e do colmo de capim-braquiária (Brachiaria decumbens), capim-gordura (Melinis minutiflora) e capim-tifton 85 (Cynodon sp). Foram amostradas a 7ª (capim-braquiária e capim-gordura) e a 11ª (capim-tifton 85) lâminas foliares, no dia da exposição da lígula e 20 dias após. Por meio de observações ao microscópio foram estimadas a extensão da digestão in vitro dos tecidos da lâmina e do colmo e a redução na espessura da parede de células do esclerênquima do colmo. Lâminas foliares e segmentos de colmos jovens apresentaram maiores áreas digeridas. Permaneceram intactos os tecidos com células de parede espessada e lignificada, a bainha parenquimática dos feixes, o esclerênquima, o xilema e a epiderme do colmo. Tecidos com células de parede delgada, normalmente não-lignificada, o mesofilo, o floema e o parênquima, desapareceram completamente. O avanço na idade reduziu a digestão do mesofilo, em lâminas de capim-braquiária e capim-gordura, e do parênquima em colmos, principalmente de capim-gordura. A epiderme na lâmina foliar foi parcialmente digerida, independentemente da idade e da espécie. Embora aparentemente intactas, células esclerenquimáticas do colmo sofreram redução da espessura da parede com a incubação em líquido ruminal. A porcentagem de redução variou de 7 a 37% e a taxa de redução da espessura de 0,007 a 0,018 µm/h.

Fatores de sucesso no desenvolvimento de novos produtos em pequenas empresas: um estudo de caso em um fabricante de equipamentos para gás natural veicular

This study presents itself as a contribution to the solidification of the Natural Gas industry, within the scope of the development of new products. The goal of this paper is to analyze the factors that lead to the success of new products through the evaluation of the activities done during the process of development of these products in the Natural Gas sector. To achieve this goal a case study was done in a small company of this segment. At first, as a basis for the study, a bibliographical research was done with books, theses, dissertations, monographies, publications in national and international periodicals, congress annals and publications in the internet related to the subject. Afterwards, a case study was done, aiming at the acquisition of further knowledge about the real process of development of products in a small company of the Natural Gas sector, allowing for the performance of the evaluation. The case study was done at Gas Project and Systems do Brasil, a company that works with the development of electronic equipment to the conversion of car engines to natural gas, through direct observations and interviews with the person responsible for the development and management of products. Through the evaluation of the process it was observed that the activities related to it are done in an informal way and some activities are considered unnecessary for their success. The results also suggest an emphasis in the technological activities, something that was not observed in the activities related to the market. The instruments used in this evaluation prove to be efficient to evaluate the process of development of new products in other companies, including those of different areas. Taking into account the relevance of the studied theme to the strengthening of the Natural Gas industry, it is necessary to do further complementary studies

Desenvolvimento de um ressoador retangular de fenda com múltiplas camadas de substrato e com utilização de material PBG para sistema de comunicação sem fio

In the globalized world modern telecommunications have assumed key role within the company, causing a large increase in demand for the wireless technology of communication, which has been happening in recent years have greatly increased the number of applications using this technology. Due to this demand, new materials are developed to enable new control mechanisms and propagation of electromagnetic waves. The research to develop new technologies for wireless communication presents a multidisciplinary study that covers from the new geometries for passive antennas, active up to the development of materials for devices that improve the performance at the frequency range of operation. Recently, planar antennas have attracted interest due to their characteristics and advantages when compared with other types of antennas. In the area of mobile communications the need for antennas of this type has become increasingly used, due to intensive development, which needs to operate in multifrequency antennas and broadband. The microstrip antennas have narrow bandwidth due to the dielectric losses generated by irradiation. Another limitation is the degradation of the radiation pattern due to the generation of surface waves in the substrate. Some techniques have been developed to minimize this limitation of bandwidth, such as the study of type materials PBG - Photonic Band Gap, to form the dielectric material. This work has as main objective the development project of a slot resonator with multiple layers and use the type PBG substrate, which carried out the optimization from the numerical analysis and then designed the device initially proposed for the band electromagnetic spectrum between 3-9 GHz, which basically includes the band S to X. Was used as the dielectric material RT/Duroid 5870 and RT/Duroid 6010.LM where both are laminated ceramic-filled PTFE dielectric constants 2.33 and 10.2, respectively. Through an experimental investigation was conducted an analysis of the simulated versus measured by observing the behavior of the radiation characteristics from the height variation of the dielectric multilayer substrates. We also used the LTT method resonators structures rectangular slot with multiple layers of material photonic PBG in order to obtain the resonance frequency and the entire theory involving the electromagnetic parameters of the structure under consideration. xviii The analysis developed in this work was performed using the method LTT - Transverse Transmission Line, in the field of Fourier transform that uses a component propagating in the y direction (transverse to the real direction of propagation z), thus treating the general equations of the fields electric and magnetic and function. The PBG theory is applied to obtain the relative permittivity of the polarizations for the sep photonic composite substrates material. The results are obtained with the commercial software Ansoft HFSS, used for accurate analysis of the electromagnetic behavior of the planar device under study through the Finite Element Method (FEM). Numerical computational results are presented in graphical form in two and three dimensions, playing in the parameters of return loss, frequency of radiation and radiation diagram, radiation efficiency and surface current for the device under study, and have as substrates, photonic materials and had been simulated in an appropriate computational tool. With respect to the planar device design study are presented in the simulated and measured results that show good agreement with measurements made. These results are mainly in the identification of resonance modes and determining the characteristics of the designed device, such as resonant frequency, return loss and radiation pattern

Desenvolvimento de um protocolo de comunicação para automação de subestações móveis via satélite

One of the most important decisions to turn a substation automatic and no attended it relates to the communication media between this substation and Operation Center. Generally energy companies uses radio or optic fiber, depending of distances and infrastructure of each situation. This rule applies to common substations. Mobile substations are a particular case, therefore they are conceived for use at provisional situations, emergencies, preventive or corrective maintenance. Thus the telecommunication solution used at common substations are not applied so easily to mobile substations, due absence of infrastructure (media) or difficulty to insert the mobile substation data in existing automation network not long. The ideal media must supply covering in a great geographic area to satisfy presented requirements. The implantation costs of this big infrastructure are expensive, however a existing operator may be used. Two services that fulfill that requirements are satellite and cellular telephony. This work presents a solution for automation of mobile substations through satellite. It was successfully implanted at a brazilian electric energy concessionaire named COSERN. The operation became transparent to operators. Other gotten benefits had been operational security, quality in the supply of electric energy and costs reduction. The project presented is a new solution, designed to substations and general applications where few data should be transmitted, but there is difficulties in relation to the media. Despite the satellite having been used, the same resulted can be gotten using celullar telephony, through Short Messages or packet networks as GPRS or EDGE.