Egg Parasitoids of the Leafhoppers Dalbulus maidis and Dalbulus elimatus (Hemiptera: Cicadellidae) in Two Maize Habitats

Este trabajo fue realizado en dos habitats diferentes de maíz en Mexico, con el objetivo de determinar los parasitoides de huevos de dos importantes chicharritas plagas del maíz en este país. se empleó la siguiente metodología: plantas de maíz con similar número de huevos de D. maidis y D. elimatus fueron expuestos a los parasitoides. Ambas especies de chicharritas fueron parasitadas por Paracentrobia tapajosae Viggiani (Hymenoptera: Trichogrammatidae), Anagrus breviphragma Soyka (Hymenoptera: Mymaridae), Aphelinoidea semifuscipennis (Hymenoptera: Trichogrammatidae) y Pseudoligositalongifrangiata (Viggiani) (Hymenoptera: Trichogrammatidae). Todas las especies de parasitoidesque atacan a los huevos de D. elimatus son reportadas por primera vez. Además, en ambas especies de chicharritas se encontró un número similar de huevos parasitados y porcentaje de parasitismo, y los parasitoides encontrados llegaron a su estado adulto. La tasa total de parasitismo depende del tipo de hábitat; en el hábitat donde se cultiva maíz todo el año, una alta tasa de parasitismo fue encontrada, mientras que en el hábitat con maíz estacional, la tasa de parasitismo fue baja.Fil: Moya Raygoza, Gustavo. Universidad de Guadalajara; MéxicoFil: Renteria, Isabel. Universidad de Guadalajara; MéxicoFil: Luft Albarracin, Erica Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Planta Piloto de Procesos Industriales Microbiologicos; ArgentinaFil: Virla, Eduardo Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Planta Piloto de Procesos Industriales Microbiologicos; Argentin

Capacidades de Innovación Empresarial en las Mipymes vinculadas al Programa Alianzas para la innovación de la Cámara de Comercio de Palmira – Valle del Cauca

Según el Índice Global de Competitividad del Foro Económico Mundial (WEF), Colombia ha conservado durante los últimos años la misma posición en temas de competitividad sin evidenciar una mejoría significativa. La innovación es un eje fundamental del desarrollo y crecimiento económico de las empresas que buscan mantenerse vivos en un mundo cada vez más globalizado y en constante cambio. La presente propuesta de investigación tiene como objetivo principal, diagnosticar las capacidades de Innovación Empresarial en las Mipymes vinculadas al Programa Alianzas para la Innovación de la Cámara de Comercio de Palmira – Valle del Cauca en el 2017. Con ello, se aspira contribuir a la meta del gobierno nacional plasmada en su PND 2014 – 2018 mediante la cual pretende que Colombia sea uno de los países con mayores índices de competitividad y productividad. Para ello se generará, una investigación mixta con estudios descriptivos de corte transversal, tomando como población 50 Mipymes de la ciudad de Palmira que han participado en las versiones 2015 y 2016 en el programa mencionado anteriormente teniendo como muestra el 50% de la población.//Abstract: According to the Global Index of Competitiveness of World Economic Forum (WEF), Colombia has retained during the last years the same position in the issues of competitiveness without evidencing a significant improvement. In addition, it is important to bear in mind that innovation is a fundamental axis of the development and economic growth of companies that seek to stay alive in an increasingly globalized and constantly changing world. The present research proposal has as main objective to diagnose the capabilities of Business Innovation in Msmes linked to the Alliances for Innovation Programme of the Chamber of Commerce of Palmira – Valle del Cauca in 2017. With this, it is hoped to contribute to the goal of the national government embodied in its PND 2014 - 2018, in which it aims to make Colombia one of the countries with the highest levels of competitiveness and productivity. To do so, a mixed research with cross-sectional descriptive studies will be generated, taking as a population 50 Mipymes from the city of Palmira that are members of the above mentioned program with 50% of the population as a sample

Zero-Hopf bifurcation and periodic solutions for a four-dimensional hyperchaotic system

Nesta dissertação estudamos a dinâmica local de um sistema hipercaótico de tipo Lorenz dependendo de sete parâmetros. Usando a teoria Averaging caracterizamos as bifurcações de soluções periódicas nos pontos de equilíbrio zero-Hopf e descrevemos as condições suficientes, que asseguram que duas soluções periódicas nasçam a partir do ponto de bifurcação.In this thesis we study the local dynamics of a hyperchaotic Lorenz-type system depending on seven parameters. Using the Averaging theory we characterize the bifurcations of periodic solutions at zero-Hopf equilibrium points and describe the sufficient conditions, which ensure that two periodic solutions are born from the bifurcation point

Architectural analysis: an inmersion in the first design course

El curso de Análisis Arquitectónico fue el punto cero desde donde se implantó, en sus inicios (curso 1997-1998), la línea pedagógica de los estudios de la Escuela de Arquitectura de La Salle - Universidad Ramon Llull, en Barcelona, y sigue siendo el primer encuentro del alumno con la arquitectura a través de la disciplina del proyecto. Los arquitectos Josep Llinàs y José Antonio Martínez Lapeña, primeros responsables de la asignatura, sentaron las bases y plantearon la formación desde su experiencia personal como docentes y profesionales. El alumno realiza una inmersión práctica en la arquitectura: una experiencia total en la que éste se expone desde el primer día a la arquitectura vivida y construida, mediante el análisis de edificios e intervenciones existentes, su representación y su modificación.The Architectonic Analysis course was the starting point from where it was implanted, in its beginnings (course 1997-1998), the pedagogical line of the studies of the School of Architecture at La Salle-Ramon-Llull University, in Barcelona, and remains the first encounter of the Student with architecture, through the discipline of the design studio. The architects Josep Llinàs and José Antonio Martínez Lapeña, first responsibles for the subject, laid the foundations and raised the training from their personal experience as teachers and professionals. The student performs a practical immersion in architecture: a total experience in which he-she is exposed from the first day to the experience of architecture and its construction, through the analysis of existing buildings and interventions, its representation and modification.Peer Reviewe

Favorecer el aprendizaje de conceptos químicos a través de una secuencia didáctica haciendo uso de la herramienta tecnológica Educaplay en los grados decimo y once de la Institución Educativa Alejandro Vélez Barrientos sede Alto de Las Flores.

Este proyecto tiene como objeto el aprendizaje de conceptos quimicos en la población de estudio, se diseñó de una secuencia didáctica haciendo uso de la herramienta tecnológica Educaplay para aprender conceptos químicos en estudiantes de los grados decimo y once, de la Institución Educativa Alejandro Vélez Barrientos, se alto de las Flores ubicada en Envigado Antioquia. A través de pruebas internas y externas se evidenciaron dificultades para aprender conceptos químicos en un 65% aproximadamente de estudiantes de cada grupo de la media, a estas se les da solución implementando una secuencia didáctica que facilite el entendimiento de conceptos quimicos y se evaluaron los resultados. EFue una innovación pedagógica con calidad que cumplió los estándares y DBA del área de ciencias naturales – química, se apoyó en la estrategia de aprendizaje secuencia didáctica, porque tiene afinidad con el área de Ciencias Naturales química, y permitió desarrollar habilidades y competencias científicas. También se hizo la intervención pedagógica o innovación TIC, el análisis de datos, conclusiones y recomendaciones para cada uno de los objetivos específicos, se analizaron los hallazgos y con base en estos se hicieron las recomendaciones y aportes a la educación desde todos sus aspectos.MaestríaMagíster en Recursos Digitales Aplicados a la Educació

Alejandro Zohn: structure & form

Alejandro Zohn (1930-2000) studied both at the same time civil engineering and architecture in Guadalajara, Jalisco, Mexico. From his student times he became interested in the plastic and formal qualities of ruled structures and concrete. This is evidenced by his final works and his engineering thesis "Nuevo Mercado Libertad” in the San Juan de Dios neighbourhood, in 1955. A couple of years later, the thesis became one of the main buildings in the city. This design project will determine his personal path in architecture: using the hyperbolic paraboloid, a ruled surface that solves not only the roof but the entire building, obtaining spaces of great interior and exterior expressive richness, which are halfway between architecture and sculpture. Added to this is the use of a reduced range of traditional materials in conjunction with industrial materials. This article explores the origin of this way of designing and unfolds the compositional mechanisms that the architect-engineer uses in his design projects. Starting from a basic unit that, singularly or systematically repeated, solves a wide range of architectural typologies, Zohn creates a set of masterful works that have spatial qualities in accordance with the specificity of the place, with the properties of the materials and with the programe requirements.Peer ReviewedPostprint (published version

Capturing the drivers of social SDGs: An econometric analysis of the dimensions of health and education.

With the changing policy landscape, the monitoring of human development in terms of the three pillars of sustainability (i.e., economic, social, environmental) has gained considerable traction in recent years. As a tool for conducting economic impact assessments, CGE simulation modelling is a workhorse member of the standard toolbox of modelling applications available to policy-makers, think tanks and academics alike. Notwithstanding, whilst simulation modelling is adept (in differing degrees) at handling issues relating to two of the three dimensions of sustainability, the social dimension remains neglected. Indeed, with their reliance on strictly market driven concepts, the task of including social indicators in economic models relating to, for example, health or education, necessitates a linkage with historical observation and statistical rigour. This paper sets out to provide an initial step toward filling this gap. More specifically, employing panel datasets and econometric model specifications based on searches of the relevant literature, this paper provides parametric linkages between identifiable indices in economic simulation models and a selection of six indicators covering health and education. One of the conclusions drawn from this paper is the significant effect of per capita GDP on health and education indicators. Nevertheless, the impact of other drivers, such as the food intake or the share of the agricultural sector on GDP, have a similar or even a greater magnitude than the income level. We also found a close relationship between health and education, since all health indicators tend to improve as the years of schooling increase. In contrast, the impact of pollution, trade openness and inequality on the selected indicators is much more reduced and, in most cases, not statistically significant

Capturing the drivers of social SDGs: An econometric analysis of the dimensions of health and education.

With the changing policy landscape, the monitoring of human development in terms of the three pillars of sustainability (i.e., economic, social, environmental) has gained considerable traction in recent years. As a tool for conducting economic impact assessments, CGE simulation modelling is a workhorse member of the standard toolbox of modelling applications available to policy-makers, think tanks and academics alike. Notwithstanding, whilst simulation modelling is adept (in differing degrees) at handling issues relating to two of the three dimensions of sustainability, the social dimension remains neglected. Indeed, with their reliance on strictly market driven concepts, the task of including social indicators in economic models relating to, for example, health or education, necessitates a linkage with historical observation and statistical rigour. This paper sets out to provide an initial step toward filling this gap. More specifically, employing panel datasets and econometric model specifications based on searches of the relevant literature, this paper provides parametric linkages between identifiable indices in economic simulation models and a selection of six indicators covering health and education. One of the conclusions drawn from this paper is the significant effect of per capita GDP on health and education indicators. Nevertheless, the impact of other drivers, such as the food intake or the share of the agricultural sector on GDP, have a similar or even a greater magnitude than the income level. We also found a close relationship between health and education, since all health indicators tend to improve as the years of schooling increase. In contrast, the impact of pollution, trade openness and inequality on the selected indicators is much more reduced and, in most cases, not statistically significant

Programmed cell death promotes male sterility in the functional dioecious Opuntia stenopetala (Cactaceae)

Background and AimsThe sexual separation in dioecious species has interested biologists for decades; however, the cellular mechanism leading to unisexuality has been poorly understood. In this study, the cellular changes that lead to male sterility in the functionally dioecious cactus, Opuntia stenopetala, are described.MethodsThe spatial and temporal patterns of programmed cell death (PCD) were determined in the anthers of male and female flowers using scanning electron microscopy analysis and histological observations, focusing attention on the transition from bisexual to unisexual development. In addition, terminal deoxynucleotidyl transferase-mediated dUTP nick-end labelling assays were used as an indicator of DNA fragmentation to corroborate PCD.Key resultsPCD was detected in anthers of both female and male flowers, but their patterns differed in time and space. Functionally male individuals developed viable pollen, and normal development involved PCD on each layer of the anther wall, which occurred progressively from the inner (tapetum) to the outer layer (epidermis). Conversely, functional female individuals aborted anthers by premature and displaced PCD. In anthers of female flowers, the first signs of PCD, such as a nucleus with irregular shape, fragmented and condensed chromatin, high vacuolization and condensed cytoplasm, occurred at the microspore mother cell stage. Later these features were observed simultaneously in all anther wall layers, connective tissue and filament. Neither pollen formation nor anther dehiscence was detected in female flowers of O. stenopetala due to total anther disruption.ConclusionsTemporal and spatial changes in the patterns of PCD are responsible for male sterility of female flowers in O. stenopetala. Male fertility requires the co-ordination of different events, which, when altered, can lead to male sterility and to functionally unisexual individuals. PCD could be a widespread mechanism in the determination of functionally dioecious species