Sistemas de tuberías y fittings, de polipropileno para la conducción de agua potable en edificación

Tesis (Ingeniero Constructor)El siguiente trabajo de título tiene como objetivo dar a conocer un producto confiable capaz de transportar agua potable, soportando altas temperaturas y presiones, eliminando así filtraciones. Se desea garantizar la calidad del diseño y ejecución de un sistema de instalación de Agua Potable fría y caliente, para instalaciones interiores. Este producto se conoce como tubería de polipropileno copolímero Random (PP-R). El PP-R, es un material que se encuentra en periíodo de crecimiento en el mercado nacional. Dentro de sus aplicaciones en instalaciones de agua potable, se considera como uno de los más atractivos productos debido a su condición de competitividad económica frente al cobre, generando un aumento en el consumo de este material termoplástico. Se desarrolla un -análisis de diseño de las tuberías de PP-R y un comparativo económico frente a materiales como el cobre comúnmente usados en la ejecución de proyectos para la conducción de fluidos, proponiendo la sustitución por un material de calidad superior.The following work of title(degree) has as aim(lens) announce a reliable product capable of transporting drinkable water, supportíng high temperatures and pressures, eliminating filtrations like that. One wants to guarantee the quality of the design and execution of a system of installation of Drinkable cold and warm Water, for interior facilities. This product knows as pipeline of polipropileno copolimero random (pp-r). The pp-r is a material that one finds in period of growth on the domestic market. Inside his (her, your) applications in facilities of drinkable water, it is considered to be one of the most attractive products due to his (her, your) condition of economic competitiveness opposite to the copper, generating an increase in the consumption of this material termoplástico. There develops an analysis of design of the pipelines of pp-r and the comparative economic one opposite to materials as(like) and charge commonly used in the project execution for the conduction(driving) of f1uids, proposing the substitution for a material of top quality

Book Review of Heather McCrea, Diseased Relations: Epidemic, Public Health, and State-Building in Yucatán, Mexico, 1847-1924

Diseased Relations is an impressive work succinct in its focus on the topic of public health history in the Mexican state of Yucatán. Adding to a growing body of scholarship on the nineteenth and early twentieth centuries, this book offers a new lens through which to consider the mechanics of state formation. In this turn to the study of disease and public health, McCrea pulls in the unfolding story of science’s understanding of the origin and spread of diseases and reflects upon the dialogue between national officials and state or local officials in the Yucatán. By choosing to focus on specific disease campaigns, McCrea extends the common discussion of state formation and casts it into a light of intimacy and personal level as she explores the ways in which disease prevention touched and changed the lives of individuals. Instead of viewing ‘nation-building’ through abstractions, she adroitly pursues the palpable and deadly topic of disease and efforts to combat epidemics as a clear implementation of the long-arm of the state into the private lives of individuals

Entropy of entanglement between quantum phases of a three-level matter-radiation interaction model

We show that the entropy of entanglement is sensitive to the coherent quantum phase transition between normal and super-radiant regions of a system of a finite number of three-level atoms interacting in a dipolar approximation with a one-mode electromagnetic field. The atoms are treated as semi-distinguishable using different cooperation numbers and representations of SU(3), variables which are relevant to the sensitivity of the entropy with the transition. The results are computed for all three possible configurations ({\Xi}, {\Lambda} and V ) of the three-level atoms.Comment: 17 pages, 13 figure

English Language Minority Students and Education Policy: A Focus on the Latinx Population

Our federal government allows states to pass and ratify new laws every year. Over the last thirty years, America has experienced a polarized fight over the expansion or reduction of government involvement. In terms of education policy, local districts and governments can play an essential role in the implementation, evaluation, and development of equitable educational opportunities. This paper examines federal and state level policies in the context of English Language Learners’ (EL) educational opportunities. In particular, I focus on Mt. Diablo High School, which is located in the Mount Diablo District. According to the California State Department of Education, the percentage of English Language Learners at this school is 33.5%. Out of this percentage, a majority of English Language Learner students at Mt. Diablo High School are Latinx (84.98%). These statistics help to demonstrate that state and district level policies lack inclusivity, student awareness on academic resources, accessibility to career center programs, and a lack of parent and teacher participation. Due to these shortcomings, these policies primarily feed into the undereducation and retention of EL students. By analyzing existing Student Site Council meetings and state-level data sets, I argue that there is a higher need for accountability and support relative to the number of EL students attending Mt. Diablo High School