Análisis comparativo y de seguimiento entre planificaciones iniciales de obra y tiempos reales de ejecución en un edificio plurifamiliar de VPO

Este trabajo está estructurado según la normativa de trabajo de fin de grado. En el inicio contamos con una breve introducción del estudio realizado y aquellos objetivos con los que parte nuestro proyecto. Una vez dentro del núcleo, nos encontramos con una breve memoria descriptiva que nos explicará las características generales del solar, así como los parámetros urbanísticos que definen la edificación o como se ha realizado la contratación y la relación entre la promotora y la constructora. El siguiente punto tratará sobre el seguimiento de obra. De manera gráfica descubriremos los sistemas de ejecución desde la cimentación hasta la etapa de cerramientos. Este seguimiento irá acompañado de un reportaje fotográfico de cada visita semanal realizada. Una vez finalizado este punto, daremos paso al principal estudio del trabajo: la comparación entre planificaciones iniciales y los tiempos reales de ejecución en obra. También lo trataremos de una manera muy visual ayudándonos con gráficos de Gantt. Acto seguido, daremos paso al análisis de este punto y aplicación de diversas mejoras para optimizar el cumplimiento de las planificaciones iniciales deseadas. El apartado que seguirá a este punto tratará de las medidas de obra que nos hemos encontrado: tanto los planteados por la promotora en su promoción y los relacionados una vez iniciada la obra. Esta organización estará acompañada con diferentes planos POP para conocer el estado de organización durante las diferentes fases. No nos olvidaremos en conocer forma y las cantidades aproximadas de la gestión de residuos, así como el cumplimiento de la eficiencia energética. Finalmente, haremos un repaso a todos aquellos cambios que se han generado. Distinguiremos los estados iniciales planteados, como se han solucionado y el impacto que estos han supuesto. Para terminar, veremos las conclusiones a las que nosotros hemos llegado y conoceréis nuestro punto de vista

An independent constraint on the secular rate of variation of the gravitational constant from pulsating white dwarfs

A secular variation of the gravitational constant modifies the structure and evolutionary time scales of white dwarfs. Using an state-of-the-art stellar evolutionary code and an up-to-date pulsational code we compute the effects of a secularly varying $G$ on the pulsational properties of variable white dwarfs. Comparing the the theoretical results obtained taking into account the effects of a running $G$ with the observed periods and measured rates of change of the periods of two well studied pulsating white dwarfs, G117--B15A and R548, we place constraints on the rate of variation of Newton's constant. We derive an upper bound $\dot G/G\sim -1.8\times 10^{-10}$ yr$^{-1}$ using the variable white dwarf G117--B15A, and $\dot G/G\sim -1.3\times 10^{-10}$ yr$^{-1}$ using R548. Although these upper limits are currently less restrictive than those obtained using other techniques, they can be improved in a future measuring the rate of change of the period of massive white dwarfs.Comment: 13 pages, 4 tables, 3 figures. To be published in the Journal of Cosmology and Astroparticle Physic

Frecuencia de parasitosis en población infantil en el hospital general de Izucar de Matamoros Puebla de Julio de 2012 a Junio de 2013

"Las infecciones parasitarias son un problema de salud pública que no se le ha dado la importancia adecuada tanto de parte de la población como del personal de salud y que sin embargo presenta altas prevalencias en nuestro medio. Los datos obtenidos del presente estudio coproparasitoscópico fueron realizados con la finalidad de saber la frecuencia del agente causal de las infecciones parasitarias gastrointestinales en pacientes de edades de entre 0 y 10 años que se presentaron al servicio de laboratorio de análisis clínicos del Hospital General de la Secretaria de Salud del municipio de Izúcar de Matamoros,Puebla durante el periodo de julio 2012 a junio 2013.

Influence of magnetic interactions between phases on the magnetocaloric effect of composites

Magnetocaloric materials with coexisting magnetic phases appear either due to the phase coexistence in first order phase transitions, or due to the development of composites, which are known to enhance the refrigerant capacity and produce table-like magnetocaloric effect. However, interactions between phases are rarely considered. We have modeled the influence of interactions on the magnetocaloric effect of a biphasic composite by implementing a mean field model. Interactions shift the peak magnetic entropy change to higher temperatures than those of the pure phases and enhance the table-like character of the curves. Although there is no qualitative change of the magnetocaloric response of the composites due to interactions, the optimal fraction of phases which produces the largest enhancement of the refrigerant capacity is shifted to compositions richer in the low Curie temperature phase. This shift can be used to estimate the magnitude of the interactions in composites measured experimentally

Requirement of a Plasmid-Encoded Catalase for Survival of \u3cem\u3eRhizobium etli\u3c/em\u3e CFN42 in a Polyphenol-Rich Environment

Nitrogen-fixing bacteria collectively called rhizobia are adapted to live in polyphenol-rich environments. The mechanisms that allow these bacteria to overcome toxic concentrations of plant polyphenols have not been clearly elucidated. We used a crude extract of polyphenols released from the seed coat of the black bean to simulate a polyphenol-rich environment and analyze the response of the bean-nodulating strain Rhizobium etli CFN42. Our results showed that the viability of the wild type as well as that of derivative strains cured of plasmids p42a, p42b, p42c, and p42d or lacking 200 kb of plasmid p42e was not affected in this environment. In contrast, survival of the mutant lacking plasmid p42f was severely diminished. Complementation analysis revealed that the katG gene located on this plasmid, encoding the only catalase present in this bacterium, restored full resistance to testa polyphenols. Our results indicate that oxidation of polyphenols due to interaction with bacterial cells results in the production of a high quantity of H2O2, whose removal by the katG-encoded catalase plays a key role for cell survival in a polyphenol-rich environment

Assessment of reliability and validity of the Spanish version of the Nursing Students’ Perception of Instructor Caring (S-NSPIC)

The care that clinical instructors demonstrate to students is essential for their education, considering the strong impact it has on their future relationships with patients, relatives, and other health professionals. Nursing Students’ Perceptions of Instructor Caring (NSPIC) is an instrument designed to assess nursing students’ perceptions of instructor’s caring behaviors. A trans-cultural, conceptual, and psychometric validation study was conducted with 315 nursing students at the University of Seville during their clinical practices in three regional hospitals. The NSPIC was translated and adapted to Spanish. The content validity was established by a panel of experts. To assess concurrent validity the culturally adapted Spanish version of the Clinical Placement Evaluation Tool (CPET) was used as a gold standard. The construct validity was determined by an exploratory factor analysis to identify the internal structure of the NSPIC-S. The internal consistency was established by Cronbach’s α and the intra-observer reliability for each item was established by test-retest. The content validity index varied between 0.53 and 0.93 and the correlation to the CPET was moderate. The factor analysis revealed a structure of five factors, one of which differed from the original scale. The value of Cronbach’s α was 0.95 and intraclass correlation coefficients varied between 0.5 and 0.89. Our study provided a culturally adapted version of the NSPIC, valid and reliable to be used in the Spanish context, the NSPIC-S

Articulación de la educación media con la superior en el manejo integrado de cultivos hortícolas

Este proyecto de articulación tiene como finalidad capacitar estudiantes de bachillerato de colegios departamentales de la zona, que se encuentren cursando décimo y/o undécimo grado, en temas de importancia para el sector hortícola, como son el riego, la fertilización y la sanidad vegetal. Comprende la asociación de los municipios de Cajicá donde se encuentra ubicada la sede de la Facultad de Ciencias de la Universidad Militar Nueva Granada y Chía específicamente la vereda Fagua con la empresa de flores MG. Consultores y el Colegio Departamental Fagua. Esta zona se encuentra inmersa en un área mucho mayor que se conoce como la Asociación de Municipios de la Provincia de Sabana Centro (Asocentro), creada en la década de los ochenta y conformada por 11 municipios (Cajicá, Chía, Cogua, Cota, Gachancipá, Nemocón, Sopo, Tabio, Tenjo, Tocancipá, Zipaquira) de vocación agropecuaria, enfocada a la solución de problemas como lo son el de mejorar la calidad de vida y el bienestar social de los habitantes de la región, la toma de decisiones de impacto regional relacionadas con el agro, la creación de un área agropolitana que funcione como fuente de productos agrícolas para la capital y el fortalecimiento del desarrollo de actividades agrícolas como el cultivo de flores. De esta forma se busca aplicar los avances y resultados obtenidos de las investigaciones en la universidad a la comunidad de su área de impacto directo (ASOCENTRO).Pregrad

Caracterización Macroscópica De Morteros Romanos De Tipo Industrial En Villamanta (Madrid). Primeros Datos

The objective of this article is to show the results obtained from the physical and macroscopic characterization of the mortars sampled by Isabel Marqués and Alejandro Bermúdez, archaeological directors of the intervention carried out in El Tejar settlement, in the municipality of Villamanta (Madrid, Spain). The results of this work have determined a relevant typological classification among the samples, highlighting the presence of siliceous aggregates, ceramics in some mortars, a very varied grading and a distribution of the components that have conditioned the conservation. Of the four samples taken -VMT1 to VMT4- one of them has an aqueous pigmentation, belonging to an inside plaster, while the others correspond to lime mortars with aggregates from hydraulic surfaces. The archaeological investigation of the deposit of Villamanta is complemented by an implementation check of lime mortars, being one of the most important Roman context of Madrid. This research add a sequence of new results around the Roman mortars and implements a methodology in the study of the historical mortars

Hot C-rich white dwarfs: Testing the DB-DQ transition through pulsations

Context. Hot DQ white dwarfs are a new class of white dwarf stars that were discovered recently within the framework of the SDSS project. There are nine known hot DQ stars, out of a total of several thousands white dwarfs spectroscopically identified. Three hot DQ white dwarfs have been reported to exhibit photometric variability with periods compatible with pulsation g-modes. Aims. We present a nonadiabatic pulsation analysis of carbon-rich hot DQ white dwarf stars. One of our main aims is to test the convective-mixing scenario for the origin of hot DQs by studying their pulsational properties. Methods. Our pulsation study is based on the full evolutionary models of hot DQ white dwarfs developed by Althaus and collaborators, which consistently cover the entire evolution from the born-again stage to the white dwarf cooling track. Specifically, we present a stability analysis of white dwarf models from stages before the blue edge of the DBV instability strip (Teff ≈ 30 000 K), until the domain of the hot DQ white dwarfs (18 000-24 000 K), including the transition DBhot DQ white dwarf. We explore evolutionary models with M* = 0.585 M⊙ and M* = 0.87 M⊙, and two values of the thickness of the He-rich envelope (MHe = 2x10-7 M* and = 10-8 M*). These envelopes are 4–5 orders of magnitude thinner than those of standard DB white dwarf models resulting from canonical stellar evolution computations. Results. We found that at evolutionary phases in which the models are characterized by He-dominated atmospheres, they exhibit unstable g-mode pulsations typical of DBV stars, and when the models become DQ white dwarfs with carbon-dominated atmospheres, they continue being pulsationally unstable with characteristics similar to DB models, and in agreement with the periods detected in variable hot DQ white dwarfs. In particular, for models with MHe = 10-8 M*, a narrow gap exists separating the DB from the DQ instability domains. Conclusions. Our calculations provide strong support for the convective-mixing picture of the formation of hot DQs. In particular, our results suggest the existence of pulsating DB white dwarfs with very thin He-rich envelopes, which after passing the DBV instability strip become variable hot DQ stars. The existence of these DB stars with very thin envelopes should be investigated by asteroseismology.Facultad de Ciencias Astronómicas y GeofísicasInstituto de Astrofísica de La Plat

An independent constraint on the secular rate of variation of the gravitational constant from pulsating white dwarfs

A secular variation of the gravitational constant modifies the structure and evolutionary time scales of white dwarfs. Using an state-of-the-art stellar evolutionary code and an up-to-date pulsational code we compute the effects of a secularly varying G on the pulsational properties of variable white dwarfs. Comparing the the theoretical results obtained taking into account the effects of a running G with the observed periods and measured rates of change of the periods of two well studied pulsating white dwarfs, G117-B15A and R548, we place constraints on the rate of variation of Newton's constant. We derive an upper bound Ġ/G ~ −1.8 × 10−10 yr−1 using the variable white dwarf G117-B15A, and Ġ/G ~ −1.3 × 10−10 yr−1 using R548. Although these upper limits are currently less restrictive than those obtained using other techniques, they can be improved in a future measuring the rate of change of the period of massive white dwarfs. Export citation and abstractInstituto de Astrofísica de La Plat