Vigilancia tecnológica de los tres principales productos agrícolas base de alimentación y cultivados en Brasil y Argentina

La seguridad agroalimentaria debe ser prioridad para los gobiernos de Brasil y Argentina, debido a que deben garantizar la producción y el abastecimiento de los alimentos básicos para las futuras generaciones, entendido como alimentos básicos aquellos que más se consumen, ya sea en su forma original o por medio de sus subproductos, estos productos son el trigo, el maíz y el arroz. El garantizar la producción y el abastecimiento de estos productos en el corto y largo plazo, implica entender cuáles de los procesos productivos aplicados en la realización de los productos base de alimentación no son compatibles con el medio ambiente, generando impactos negativos sobre este. Estos impactos ambientales generados a partir de la agricultura, son identificados como el uso excesivo de recursos naturales entre ellos el agua, así como su contaminación por agentes toxico como los agroquímicos y fertilizantes. Asimismo, el uso de estos agentes tóxicos, genera la infertilidad de los suelos afectando directamente la producción en el largo plazo. Entender los impactos ambientales, implica desarrollar estrategias transversales que le permitan a los garantizar un desarrollo sostenible a lo largo de todo el ciclo del producto; estas estrategias deben estar acompañadas por un rendimiento y eficiencia de los cultivos, de nada sirve implementar estrategias compatibles con el medio ambiente si no se cumple con el principal objetivo de la producción de estos producto, que es garantizar el abastecimiento y alimentación para las generaciones presentes y futuras.

Laboratorio virtual para la enseñanza y aprendizaje de la identificación de microorganismos.

El trabajo, de momento, no ha sido publicado

TIC y lengua extranjera en Educación Primaria.

Se ofrecen métodos educativos de aplicación de las tecnologías de la información y comunicación en el laboratorio de idiomas. Así, las posibilidades de las TIC en el aula de inglés o francés se adaptan a cualquier nivel, desde la lectura de una noticia en línea, la utilización de un karaoke o la proyección de un DVD hasta la creación de un blog de intercambio con alumnos de otro colegio extranjero o la utilización de la pizarra electronica para mantener una videoconferencia en el aula. Se incluyen enlaces de Internet para aprender idiomas; espacios virtuales de chat para el aprendizaje de lenguas extranjeras; herramientas de autor como Clic y Hotpotatoes o herramientas de aprendizaje basadas en la indagación como Caza y Webquest. Además, se incluyen enlaces de Internet para aprender inglés y francés.

La tutoría electrónica aplicada en los proyectos de investigación en salud.

Resumen basado en el de la publicación

Enseñanza de la Lógica proposicional mediante la electrónica.

Comprobar si la Lógica proposicional explicada mediante un esquema de conocimiento significativo, utilizando para ello la electrónica digital, puede mejorar en mayor grado el completo dominio de los conceptos y leyes de la Lógica proposicional que explicados mediante un esquema dentro del contexto de los programas de Filosofía hoy vigentes. Dos grupos, un grupo de control, formado por 34 alumnos del IB Ramiro de Maeztu que reciben una enseñanza filosófica de la Lógica proposicional según los programas del MEC hoy vigentes; y otro grupo experimental de 34 alumnos del IB Cardenal Herrera Oria, impartiéndoles la enseñanza del mismo tema mediante la electronica. Se parte de la siguiente hipótesis: 'el grupo de alumnos que recibe clases de Lógica proposicional mediante un esquema significativo no obtiene un mejor y más completo dominio de las enseñanzas así como de las relaciones con otras disciplinas que el grupo de alumnos que reciben estas enseñanzas desde un esquema clásico'. Los alumnos del grupo experimental utilizan un aparato electrónico diseñado por el personal colaborador en la investigación que básicamente consiste en unas puertas lógicas y un circuito visualizador encargado de transmitir la información mediante una luz roja o verde. Dichos aparatos se utilizan con la ayuda de un guión de alumnos que contiene unos guiones de experiencias prácticas. Se estima como variable independiente el tipo de método utilizado. El nivel de inteligencia lógica de cada alumno constituye la variable secundaria o interviniente. Y como variables dependientes son la ganancia por parte de los alumnos en los conocimientos de Lógica proposicional y la ganancia en su inteligencia lógica según el método utilizado. Por último el análisis estadístico se efectúa a través de un estudio correlacional entre ambos grupos. Prueba escrita de elección múltiple, pruebas prácticas, de ejecución, de selección de algún tipo de respuesta, test específico. Agrupación por intervalos, medidas de tendencia central y de dispersión, rectas de regresión, 't' de Student, error y 'F' de Snedecor. Hay diferencia significativa al final del periodo de enseñanza entre los grupos -enseñanza mediante la electrónica, enseñanza tradicional- en cuanto a los conocimientos de Lógica proposicional, pero no en cuanto a inteligencia lógica. Por otro lado, la enseñanza de la Lógica proposicional mediante la electrónica produce mayor aumento en la ganancia de inteligencia lógica en los alumnos peor dotados.

Electrónica digital y microprogramada primero EEC.

Material no publicado .- Contiene 1. Un cuaderno -2. Un disquete

An improved digital deconvolution equation

This paper first points out the important fact that the rectangle formulas of continuous convolution discretization, which was widely used in conventional digital deconvolution algorithms, can result in zero-time error. Then, an improved digital deconvolution equation is suggested which is equivalent to the trapezoid formulas of continuous convolution discretization and can overcome the disadvantage of conventional equation satisfactorily. Finally, a simulation in computer is given, thus confirming the theoretical result.

The Prony fitting method for digital deconvolution problem

The Prony fitting theory is applied in this paper to solve the deconvolution problem. There are two cases in deconvolution in which unstable solution is easy to appear. They are: (1)the frequency band of known kernel is more narraw than that of the unknown kernel; (2) there exists noise. These two cases are studied thoroughly and the effectiveness of Prony fitting method is showed. Finally, this method is simulated in computer. The simulation results are compared with those obtained by using FFT method directly.

Is there any risk in a symbiotic species associating with an endangered one? A case of a phoronid worm growing on a Ceriantheomorphe tube

The conservation of emblematic threatened species is in highlight nowadays. Interestingly, few invertebrate groups attract scientific attention on this issue while they constitute the vast majority of animal biodiversity. Nevertheless, many invertebrate species are nowadays at risk of extinction. This means that plenty of species are currently disappearing out of sight. During a survey in the southwestern Atlantic Ocean tubes of an endangered species of cerianthid were sampled. This study reports for the very first time the occurrence of the species Phoronis australis in southwestern Atlantic waters and the association of phoronids with the genus Ceriantheomorphe. This raises questions on mutual extinction risks for symbiotic species and also on the criteria for their inclusion on Red Lists.

TERRITORIAL DISPUTES, LABOUR RELATIONS and ENVIRONMENTAL HEALTH IN AGROHIDRONEGOCIO sugarcane IN THE PONTAL PARANAPANEMA (SP)

This research aims to analyze the conflict over land in Postal do Paranapanema (state of São Paulo, Brazil), considering the competition for water resources and the degradation of environmental health in the area called the agrohidronegocio sugarcane. The survey results indicate that the expansion of sugarcane cultivation in this region is causing the worsening health of workers. Moreover, the research also seeks to identify alternative models to the hegemonic project of regional development based on matrix agrohidroenergetica. For this, the research has as interlocutors various types of social movements such as the Landless Workers Movement and the Movement of Dam Affected, and union leaders.

Permian stromatolites associated with bivalve coquina beds-Angatuba, SP, Brazil (Teresina Formation, Parana Basin)

Silicified stromatolites have been described in the Permian Teresina Formation, Passa Dois Group, of the Parana Basin. These stromatolites occur as blocks in the Fazenda Monte Alegre area at the headwaters of the creek known as Corrego Catanduva in the municipality of Angatuba. These blocks originate from the Serra de Angatuba region and were recognized in a road that was cut in the midst of sandstones and siltites. The stromatolites are isolated bioherms that are domed to subspherical with a flat base in profile and a rounded to lenticular shape in plan view. The stromatolites exhibit a reddish coloration and are composed of microcrystalline quartz. Lamination is continuous, non-columnar, and anastomosed, showing parallel to divergent growth; however, divergent columns also occur, especially at the tops of the bioherms. The lamination is fine and well preserved, with alternating light and dark laminas. Microfossils of filamentous cyanobacteria are preserved and were related to the genera Microcoleus and Rivularia. Silicified bivalves occur in association with the stromatolites and are preserved in the form of coquina beds and rare isolated specimens within the bioherms. The described specimens belong to the Pinzonella illusa biozone, with representatives of the species Pinzonella illusa, Angatubia cowperesioides, and Houldausiella elongata. The formation environment of these stromatolites is associated with tidal plains of shallow, brackish, relatively calm, warm waters of good luminosity with the presence of weak currents. There was likely a low level of predation, and the environment may have been hypersaline. The coquina beds associated with the stromatolites indicate a probable proximal tempestite, i.e., they were formed near the coastline. The stromatolites were originally composed of carbonates, although these were replaced by silica during early diagenesis.

Mandibular glands in reproductives of asian termite coptotermes gestroi (Isoptera: Rhinotermitidae)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

ROAD TRANSPORT IN BRAZIL: SOME TYPES of VISCOSITY

The planning of the transportation sector in Brazil has long been the railroads as the main engineering system of the country. Thus, it was used to carry, in addition to the physical integration of the national territory, the consolidation of its domestic market. However, after entering in the 1980s, the planning of the sector is left out, and an inversion of the matrix of development is observed, with share gains in monoculture economy and on development of new areas where agricultural expansion advanced. This situation culminated in logistics blackouts in the 1990s and the resumption of sector planning in the early twenty-first century. At this time, it establishes a new institutional apparatus that ensures the participation of private capital in the sector, as well as a new principle for resolving bottlenecks concentrated regions (economically dynamic), from targeting investments to areas of primary economies that only in recent decades have been incorporated into the national economy.

A Via Campesina Brasil e a avaliação da primeira década de impactos da reforma agrária do Banco Mundial

During the past decade, influenced strongly by World Bank land policies, many governments instituted a new mode of recreating the peasantry, one supposedly led by market forces through credit programs secured by land. Supported by large landowner organizations, defended as a conquest by the rural labor movement and combated by member organizations of the Via Campesina, the new mode of peasant renovation has inspired a diversity of interpretations both positive and negative. To evaluate these events, this article seeks to demonstrate the World Bank's intentionality in urging the implementation of market-led agrarian reform in developing countries; discusses the construction of immaterial territories in the context of this policy; analyzes the development of a people's think tank in response to the agitation of the Via Campesina Brazil and the negative impact of the credit system on peasants.

Mudança de concepção das políticas públicas para o campo brasileiro: o Programa de Aquisição de Alimentos, PAA

In the 90, the public politics for the Brazilian rural way incorporated the territorial perspective, besides they motivate the participation and the beneficiaries collective organization. In 2003 the Food Acquisition Program (FAP) was created with the intention of guaranteeing the feeding of people in social vulnerability situation or alimentary insecurity and of providing work and income in the field through the direct buying of the agriculturists foods. In a research made in two São Paulo State's towns: Tupi Paulista and Dracena, it was verified that the price paid to the farmers is higher to the regional average and because of this fact the participants have interest in enlarging the cultivated area and/or in diversifying the cultivations. Though, two problems were detected: 1) the reduced number of beneficiated producers; and, ii) the furtherance of the producers relatives already registered that try to increase their quota of products and the value to be received.