Output Regulation for Systems on Matrix Lie-group

This paper deals with the problem of output regulation for systems defined on matrix Lie-Groups. Reference trajectories to be tracked are supposed to be generated by an exosystem, defined on the same Lie-Group of the controlled system, and only partial relative error measurements are supposed to be available. These measurements are assumed to be invariant and associated to a group action on a homogeneous space of the state space. In the spirit of the internal model principle the proposed control structure embeds a copy of the exosystem kinematic. This control problem is motivated by many real applications fields in aerospace, robotics, projective geometry, to name a few, in which systems are defined on matrix Lie-groups and references in the associated homogenous spaces

Evaluacion de bicarbonato de sodio, caldo vizosa y caldo bordeles en el control de la cenicilla (Erysiphe cichoracearum DC) en el cultivo de pipian (Cucurbita pepo L.), en Apacunca, Chinandega

El pipián ( Cucurbita pepo.) tiene su origen en el continente americano, por lo que la diversidad genética presente en el continente ha permitido muchas denominaciones populares. El trabajo de investigación se llevó a cabo en la Reserva de Recursos Genéticos de Apacunca, en la comunidad de Asquespalapa, el objetivo fue encontrar opciones de bajo costo y no dañinas a la salud humana y ambiente, para el control de la Cenicilla del Pipián ( Erysiphe cichoracearum), Los tratamientos fueron arreglados en un diseño de bloque completo al azar (B.C.A) con tres réplicas. El ensayo fue establecido en una Area de 100m2. Cada parcela experimental estuvo constituida por 4 surcos de 6 metros de largo con distancia entre plantas de 1 metro. El área total de cada parcela experimental fue de 18 metros cuadrados. La parcela útil estuvo constituida por las 8 plantas centrales de cada parcela experimental. La variedad utilizada para el estudio fue la Criolla. Los tratamientos probados consistieron en tres caldos minerales preventivos y un testigo, se realizó un análisis de varianza con un 95 % de confianza y separación de medias según Tukey LSD (∞= 0.05) y análisis de beneficio costo. Los resultados indican que el caldo vizosa mostró únicamente entre un 5 y 10% de afectación en cuanto a la incidencia y severidad de la enfermedad, en segunda categoría encontramos al caldo bordelés con un 15 y 20 %, de afectación. En cuanto a la relación beneficio costo se determinó que el caldo Vizosa es un producto rentable ad amas de mantener la parcela libre de patógenos da un resultado económico en cuanto a la producción y compensación a la hora de vender en el mercado

Towards understanding the child’s experience in the process of parentification: young adults’ reflections on growing up with a depressed parent

This article reports on a qualitative study with 21 young adults who grew up with a depressed parent. We examined how young adults make sense of their childhood experiences of parental depression and how their retrospective reflections help us to understand the experiences of children and the processes of parentification. Participants recounted that their childhood consisted mainly of actions in the service of family well-being. At that time, they reflected on their own experiences only rarely. In adolescence, there was an evolution toward a greater consideration for oneself and a repositioning within the family. In the discussion, we explore the therapeutic implications of this studyand in particularthe meaningfulness of silence in the family process of parentification

Deficits on the Clock Drawing Test in Parkinson’s Disease

Parkinson’s Disease (PD) is a progressive neurodegenerative disorder that affects 1% of the world population over the age of 65—anywhere from four to six million people (National Parkinson Foundation, 2010). Although most people identify PD as a movement disorder, cognitive deficits are also present. Poor performance on tasks such as set shifting, internal control of attention, and sequencing is commonly reported by PD patients (Stout & Johnson, 2005), as are visual and verbal memory impairments (Moody, Bookheimer, Vanek, & Knowlton, 2004). Visuospatial skills are also problematic, including depth perception, spatial orientation, and spatial organization (Bowen, Burns, Brady, & Yahr, 1972)

Diseño y construcción de un reactor tipo SLAN

En el siguiente trabajo se presenta el diseño y la construcción de una cavidad resonante para la generación de plasma -- Se muestran las simulaciones realizadas para obtener la mejor distribución de campo eléctrico y a su vez los criterios de diseño para su construcción -- Se muestran también las medidas indirectas realizadas de campo eléctrico a través de mediciones de temperatura en diferentes puntos para validar la intensidad reportada en las simulaciones, así como también medidas con papel fax para corroborar la distribución de dicho campo en toda la cavida

Growing up with a mother with depression: an interpretative phenomenological analysis

The aim of this study was to explore the childhood experience of living with a parent with depression from a retrospective point of view. Five women between 39 and 47 years of age, who grew up with a mother with depression, were interviewed about their current perspectives on their childhood experiences. Interviews were semi-structured and the data were analyzed using interpretative phenomenological analysis. Data analysis led to a narrative organized in two parts. The first part (retrospective understanding of childhood experiences) reports on feelings of desolation contrasted to exceptional support, context-related dwelling on own experiences, and growing into a caring role as a way to keep standing. The second part (towards an integration of childhood experiences in adult realities) evidences ongoing processes of growing understanding of the situation at home, coping with own vulnerabilities, making the difference in their current family life and finding balance in the continued bond with the parents. This retrospective investigation of adults’ perspectives on their childhood experiences gave access to aspects of their experience that remain underexposed in research based on data from children and adolescents