Evaluación higiénica de ruido en una galletera

Conocer la exposición de los trabajadores de una empresa galletera en diferentes puestos de producción frente al ruido. Para ello se determinarán los puestos con riesgo higiénico según el R.D. 286/06 sobre protección de la salud y la seguridad de los trabajadores contra los riesgos relacionados con la exposición al ruido y así establecer las medidas de prevención y mejora para los trabajadores afectados.Departamento de Ingeniería Química y Tecnología del Medio AmbienteMáster en Gestión de la Prevención de Riesgos Laborales, Calidad y Medio Ambient

Diversity across Seasons of Culturable Pseudomonas from a Desiccation Lagoon in Cuatro Cienegas, Mexico.

Cuatro Cienegas basin (CCB) is a biodiversity reservoir within the Chihuahuan desert that includes several water systems subject to marked seasonality. While several studies have focused on biodiversity inventories, this is the first study that describes seasonal changes in diversity within the basin. We sampled Pseudomonas populations from a seasonally variable water system at four different sampling dates (August 2003, January 2004, January 2005, and August 2005). A total of 70 Pseudomonas isolates across seasons were obtained, genotyped by fingerprinting (BOX-PCR), and taxonomically characterized by 16S rDNA sequencing. We found 35 unique genotypes, and two numerically dominant lineages (16S rDNA sequences) that made up 64% of the sample: P. cuatrocienegasensis and P. otitidis. We did not recover genotypes across seasons, but lineages reoccurred across seasons; P. cuatrocienegasensis was isolated exclusively in winter, while P. otitidis was only recovered in summer. We statistically show that taxonomic identity of isolates is not independent of the sampling season, and that winter and summer populations are different. In addition to the genetic description of populations, we show exploratory measures of growth rates at different temperatures, suggesting physiological differences between populations. Altogether, the results indicate seasonal changes in diversity of free-living aquatic Pseudomonas populations from CCB

Drama activities to enhance motivation and oral production in EF high school students from the province of Valparaíso, Chile : a quasi-experimental research

Tesis (Pedagogía en Inglés)The importance of drama activities as a key element in the acquisition of a second language has been acknowledged by theorists and researchers of the area who consider this tool as an important factor to increase student’s motivation and to develop communicative skills such as oral performance. The main objective of this research was to prove empirically, through a quasi-experimental design, the effectiveness of drama activities to improve student’s oral production and motivation. These activities were adapted to the reality of the Chilean classroom according to the different contexts of foreign language learning in the Windmill College municipal school located in Villa Alemana, the subsidized school Embajadores del Rey, and finally the private school Hebreo Dr Jaim Weitzman located in Viña del Mar. The quasi-experiment was implemented in high school, with the participation of 3 classes, making a total of 50 students. The implementation of drama took place in the second semester of 2018 and lasted approximately six weeks. The results show that the strategy is, in fact, effective in secondary education.La importancia de actividades dramáticas como un elemento clave dentro de la adquisición de un segundo idioma ha sido reconocida por teóricos e investigadores en el área quienes ven esta herramienta un factor importante para poder incrementar la motivación en los estudiantes y así también desarrollar otras habilidades como la oral. El principal objetivo de esta investigación fue probar de forma empírica, a través de un diseño cuasi- experimental, la efectividad del uso del drama en la sala de clases para el desarrollo de la producción oral. Dicha estrategia fue adaptada a la realidad de la sala de clases chilena de acuerdo a los distintos contextos de aprendizaje de idioma extranjero en el colegio municipal Windmill College ubicado en Villa Alemana, el colegio Subvencionado Embajadores del Rey, y por último el colegio particular Hebreo Dr. Jaim Weitzman ubicado en Viña del Mar. El cuasi-experimento se llevó a cabo en la enseñanza media, con la participación de 3 cursos, haciendo un total de 50 alumnos. La implementación de drama se realizó durante todo el segundo semestre del año 2018 y la aplicación de la estrategia duró seis semanas. Los resultados muestran que la estrategia es, de hecho, eficaz en la enseñanza media

Machine Learning for Detection of Cognitive Impairment

The detection of cognitive problems, especially in the early stages, is critical and the method by which it is diagnosed is manual and depends on one or more specialist doctors, to diagnose it as the cognitive decline escalates into the early stage of dementia, e.g., Alzheimer's disease (AD). The early stages of AD are very similar to Mild Cognitive Impairment (MCI); it is essential to identify the possible factors associated with the disease. This research aims to demonstrate that automated models can differentiate and classify MCI and AD in the early stages. The present research used a combination of Machine Learning (ML) algorithms to identify AD, using gene expressions. The algorithms used for the classification of cognitive problems and healthy people (control) were: Linear Regression, Decision Trees (DT), Naîve Bayes (NB) and Deep Learning (DP). The result of this research shows ML algorithms can identify AD, in early stages, with an 80% accuracy, using a Deep Learning (DL) algorithm.Fil: Diaz, Valeria. Universidad de Palermo. Facultad de Ingeniería; ArgentinaFil: Rodríguez, Guillermo Horacio. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Sistemas Tandil; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Instituto Superior de Ingeniería del Software. Universidad Nacional del Centro de la Provincia de Buenos Aires. Instituto Superior de Ingeniería del Software; Argentin

Methodology for Measuring Derivatives at the Central Bank of Chile

The use of derivatives by Chilean companies has increased rapidly in recent years. Therefore, exploring how financial derivatives are measured is a subject of considerable interest. This working paper describes the collection system, and the validation and compilation processes of this instrument at the Central Bank of Chile. It includes the legal framework governing the information requirements, the sources, characterization of data collected, methodology used in the valuation process, and the different breakdowns for publishing, among others. In addition, the paper analyses the advantages and disadvantages of the Chilean system.

Women “Cronistas” in Colonial Latin America

These archive images bring forth myriad questions about how the past and present are represented. They show the violent intersection of world visions and discursive traditions; translation and survival; dialogue, destruction, and change. It is a storytelling that is individual as well as collective and a space for that which has been expelled or relegated from hegemonic discourse, although this recognition may be limited to a specifi c period, stuck in the quagmire of incessant change. The most critical question that arises here is the following: To whom are we referring when we speak of women cronistas in colonial Latin America? Which types of writing and texts are we indicating? If these texts can be grouped under the broad concept of colonial chronicles , what connections can be made with the predominant colonial literary corpus – a literature directly associated with masculine voices, articulated from the sphere of power and authority? What bonds are established with the actors (soldiers, monks, indigenous nobles, mestizos)? As Julie Greer Johnson has noted, “Because men dominated the writing of both history and literature, the image of women during the colonial period is largely based upon their vision” (157). Nevertheless, Greer Johnson chooses to focus on men’s representation of women. In contrast, this chapter reveals how women represent, write, speak, remember, and affi rm themselves and make requests in the complex sphere of the early Latin American colonial world.Facultad de Humanidades y Ciencias de la Educació

Es como tierra de nadie espacio público y ciudadanía, la construcción de significados sobre los usos del parque puente largo por parte de niños y jóvenes del grupo ambiental del Colegio Gimnasio Especializado del Norte

Esta investigación explora la naturaleza social del espacio público y en particular indaga por las comprensiones que un grupo de niños y jóvenes tienen del uso de un parque público a partir de un ejercicio interpretativo desde la psicología social. Más allá de las comprensiones sobre los usos, la investigación muestra las formas de relación existentes y las formas de apropiación y participación que se desarrollan en el parque público Puente Largo en Bogotá. This research explores the social nature of public space, more precisely the meanings given to a public park by a group of children and youth. For this purpose, the exploration was conducted through an interpretive exercise inspired by Social Psychology. This research shows the types of relationships, forms of ownership and participation that take place in the public park Puente Largo in Bogotá.This research explores the social nature of public space, more precisely the meanings given to a public park by a group of children and youth. For this purpose, the exploration was conducted through an interpretive exercise inspired by Social Psychology. This research shows the types of relationships, forms of ownership and participation that take place in the public park Puente Largo in Bogotá.Psicólogo (a)Pregrad

Changes in P-glycoprotein activity are mediated by the growth of a tumour cell line as multicellular spheroids

BACKGROUND: Expression of P-glycoprotein (P-gp), the multidrug resistance (MDR) 1 gene product, can lead to multidrug resistance in tumours. However, the physiological role of P-gp in tumours growing as multicellular spheroids is not well understood. Recent evidence suggests that P-gp activity may be modulated by cellular components such as membrane proteins, membrane-anchoring proteins or membrane-lipid composition. Since, multicellular spheroids studies have evidenced alterations in numerous cellular components, including those related to the plasma membrane function, result plausible that some of these changes might modulate P-gp function and be responsible for the acquisition of multicellular drug resistance. In the present study, we asked if a human lung cancer cell line (INER-51) grown as multicellular spheroids can modify the P-gp activity to decrease the levels of doxorubicin (DXR) retained and increase their drug resistance. RESULTS: Our results showed that INER-51 spheroids retain 3-folds lower doxorubicin than the same cells as monolayers however; differences in retention were not observed when the P-gp substrate Rho-123 was used. Interestingly, neither the use of the P-gp-modulating agent cyclosporin-A (Cs-A) nor a decrease in ATP-pools were able to increase DXR retention in the multicellular spheroids. Only the lack of P-gp expression throughout the pharmacological selection of a P-gp negative (P-gp(neg)) mutant clone (PSC-1) derived from INER-51 cells, allow increase of DXR retention in spheroids. CONCLUSION: Thus, multicellular arrangement appears to alter the P-gp activity to maintain lower levels of DXR. However, the non expression of P-gp by cells forming multicellular spheroids has only a minor impact in the resistance to chemotherapeutic agents

Lossless reshaping of structured light

Structured light concerns the control of light in its spatial degrees of freedom (amplitude, phase and polarization), and has proven instrumental in many applications. The creation of structured light usually involves the conversion of a Gaussian mode to a desired structure in a single step, while the detection is often the reverse process, both fundamentally lossy or imperfect. Here we show how to ideally reshape structured light in a lossless manner in a simple two-step process. We outline the core theoretical arguments, and demonstrate reshaping of arbitrary structured light patterns, in the process highlighting when the technique is applicable and when not, and how best to implement it. This work will be a useful addition to the structured light toolkit, and particularly relevant to those wishing to use the spatial modes of light as a basis in classical and quantum communication

Creencias y actitudes del uso de dispositivo intrauterino en mujeres en edad fértil del Centro de Salud José Napoleón García Nandasmo Masaya en el período comprendido de Enero a Junio del año 2016

El presente estudio creencias y actitudes del uso de dispositivo intrauterino en mujeres en edad fértil del centro de salud José Napoleón García Nandasmo Masaya, tiene como propósito u objetivo principal identificar y descubrir las diferentes creencias y actitudes que tienen las mujeres en edad fértil, tomando en cuenta a pacientes que estén activas en sus controles de planificación familiar, para así conocer si estas creencias influyen o no en las actitudes que tendrán las mujeres, para el uso del dispositivo intrauterino. Por lo tanto podemos evidenciar que de la muestra de 105 participantes la edad predominante fue el grupo entre 20 a 34 años de edad con un 71%, de estas el 10.5% utilizan este método en cambio el 89.5% no lo utiliza, de esto se obtiene que según los mitos y tabúes el 5% cree que se encarna al útero, un 2% provoca dolor a la pareja al tener relaciones sexuales y provocara cáncer, con el 1% él bebe nacerá con la T de cobre adherida al cuerpo y ocasiona embarazos fuera de la matriz, esto según las que si utilizan este método, en cuanto a las que no lo portan opinaron que un 20% provoca cáncer y embarazos fuera de la matriz, un 19% se encarna en el útero y causa dolor a la pareja al tener relaciones sexuales, un 7% él bebe nace con la T de cobre adherida al cuerpo, y según sus beneficios solo el 4% de las que portan el DIU creen conocer algunos de ellos, el 9.5% de las que no lo portan creen conocer algunos beneficios. Por lo tanto, concluimos con estas evidencias en que aún existen muchas creencias erróneas y muy poco conocimiento del dispositivo intrauterino, he aquí la razón por la cual no exista una actitud positiva ante la utilización de este tipo de método anticonceptiv