Producción cultural de peruanos en la ciudad de Buenos Aires: la práctica de danzas folklóricas

El trabajo describe el campo de producción cultural de migrantes peruanos en Buenos Aires, mostrando la existencia de una gama de instituciones oficiales, culturales, comerciales, y de asistencia social, por medio de las cuales los migrantes establecen relaciones artístico-productivas. Asimismo, da cuenta de la recomposición del habitus danzario y del repertorio de los grupos de baile, producto del nuevo contexto migratorio

Lejeuneaceae (Hepaticae) de Tierra del Fuego

Fil: Solari, Silvia S.. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina

PSInSAR Analysis in the Pisa Urban Area (Italy): A Case Study of Subsidence Related to Stratigraphical Factors and Urbanization

Permanent Scatterer Interferometry (PSI) has been used to detect and characterize the subsidence of the Pisa urban area, which extends for 33 km2 within the Arno coastal plain (Tuscany, Italy). Two SAR (Synthetic Aperture Radar) datasets, covering the time period from 1992 to 2010, were used to quantify the ground subsidence and its temporal evolution. A geotechnical borehole database was also used to make a correspondence with the detected displacements. Finally, the results of the SAR data analysis were contrasted with the urban development of the eastern part of the city in the time period from 1978 to 2013. ERS 1/2 (European Remote-Sensing Satellite) and Envisat SAR data, processed with the PSInSAR (Permanent Scatterer InSAR) algorithm, show that the investigated area is divided in two main sectors: the southwestern part, with null or very small subsidence rates (<2 mm/year), and the eastern portion which shows a general lowering with maximum deformation rates of 5 mm/year. This second area includes deformation rates higher than 15 mm/year, corresponding to small groups of buildings. The case studies in the eastern sector of the urban area have demonstrated the direct correlation between the age of construction of buildings and the registered subsidence rates, showing the importance of urbanization as an accelerating factor for the ground consolidation process

Comparing the effectiveness of equivalence partitioning, branch testing and code reading by stepwise abstraction applied by subjects

Some verification and validation techniques have been evaluated both theoretically and empirically. Most empirical studies have been conducted without subjects, passing over any effect testers have when they apply the techniques. We have run an experiment with students to evaluate the effectiveness of three verification and validation techniques (equivalence partitioning, branch testing and code reading by stepwise abstraction). We have studied how well able the techniques are to reveal defects in three programs. We have replicated the experiment eight times at different sites. Our results show that equivalence partitioning and branch testing are equally effective and better than code reading by stepwise abstraction. The effectiveness of code reading by stepwise abstraction varies significantly from program to program. Finally, we have identified project contextual variables that should be considered when applying any verification and validation technique or to choose one particular technique

Estudio de la Efectividad de Tres Técnicas de Evaluación de Código: Resultados de una Serie de Experimentos.

Hasta la fecha se han evaluado distintas técnicas de verificación y validación teórica y empíricamente. La mayoría de las evaluaciones empíricas se han llevado a cabo sin sujetos, abstrayendo el efecto del sujeto sobre la técnica a la hora de aplicarla. Hemos evaluado mediante un experimento con sujetos la efectividad de tres técnicas de verificación y validación de código: partición en clases de equivalencia, cobertura de decisión y lectura de código mediante abstracciones sucesivas, estudiando la capacidad de las técnicas para la detección de fallos en tres programas distintos. Hemos replicado el experimento ocho veces en cuatro entornos distintos. Los resultados arrojan diferencias entre las técnicas y señalan variables contextuales del proyecto software que deberían considerarse cuando se quiera elegir o aplicar una técnica de verificación y validación

PPID/E010: Prácticas de Responsabilidad Social Empresaria en las empresas del Gran La Plata : Definición de variables e indicadores para la determinación de los efectos de su implementación

A través del proyecto se busca obtener información acerca de las prácticas que llevan a cabo las empresas del Gran La Plata relacionadas a la Responsabilidad Social Empresaria (RSE), así como que efectos se producen por su aplicación al interior de las organizaciones.Facultad de Ciencias Económica

Estudio de la Efectividad de Tres Técnicas de Evaluación de Código: Resultados de una Serie de Experimentos

Hasta la fecha se han evaluado distintas técnicas de verificación y validación teórica y empíricamente. La mayoría de las evaluaciones empíricas se han llevado a cabo sin sujetos, abstrayendo el efecto del sujeto sobre la técnica a la hora de aplicarla. Hemos evaluado mediante un experimento con sujetos la efectividad de tres técnicas de verificación y validación de código: partición en clases de equivalencia, cobertura de decisión y lectura de código mediante abstracciones sucesivas, estudiando la capacidad de las técnicas para la detección de fallos en tres programas distintos. Hemos replicado el experimento ocho veces en cuatro entornos distintos. Los resultados arrojan diferencias entre las técnicas y señalan variables contextuales del proyecto software que deberían considerarse cuando se quiera elegir o aplicar una técnica de verificación y validación.Ministerio de Ciencia e Innovación TIN2008-0055

Películas comestibles a base de gelatina obtenida de piel de mahi-mahi (Coryphaena hippurus) y extracto de orégano: Características fisicoquímicas, antimicrobianas, estructurales y de superficie

Edible films were elaborated from gelatin solutions (4% w/v) of mahi-mahi skin (Coryphaena hippurus) with 2,5; 5; 7,5 and 10% v/v of oregano extract (OE) and its physicochemical, antimicrobial, structural and surface properties were determined. The control and with 2.5% OE films showed the lowest moisture and opacity values ​​and the highest viscosity values. All films with OE inhibited the growth of Staphylococcus aureus and Proteus vulgaris. Alone films with 10% OE showed antimicrobial activity against all the strains evaluated. Scanning electron microscopy showed that the incorporation of oregano extract in the film-forming solutions, FFS, was related to an increase in the presence of oil droplets in the films, showing the lipid fraction of OE. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) analyzes showed the interaction between gelatin, plasticizer, and oregano extract in all films. In conclusion, this study demonstrated the viability of mahi-mahi skin gelatin edible films with OE incorporated for their application as packaging with antimicrobial action in foods susceptible to spoilage by microorganisms.Se elaboraron películas comestibles a partir de soluciones de gelatina (4% p/v) de piel de mahi-mahi (Coryphaena hippurus) con 2,5; 5; 7,5 y 10% v/v de extracto de orégano (EO) y se determinaron sus propiedades fisicoquímicas, antimicrobianas, estructurales y de superficies. Las películas control y con 2,5 % de EO mostraron los valores más bajos de humedad y opacidad y los valores más altos de viscosidad. Todas las películas con EO inhibieron el crecimiento de Staphylococcus aureus y Proteus vulgaris. Sólo las películas con 10% de EO mostraron actividad antimicrobiana frente a todas las cepas evaluadas. La microscopía electrónica de barrido mostró que la incorporación del extracto de orégano en las soluciones formadoras de película, SFP, se relacionó con un incremento en la presencia de gotas de aceite en las películas evidenciándose la fracción lipídica del EO. Los análisis de espectroscopía infrarroja por transformada de Fourier (FTIR) y microscopía electrónica de barrido (SEM) mostraron la interacción entre la gelatina, el plastificante y el extracto de orégano en todas las películas. En conclusión, este estudio demostró la viabilidad de las películas comestibles de gelatina de piel de mahi-mahi con EO incorporado para su aplicación como empaque con acción antimicrobiana en alimentos susceptibles al deterioro por microorganismos

A process for managing interaction between experimenters to get useful similar replications

Context: A replication is the repetition of an experiment. Several efforts have been made to adopt replication as a common practice in software engineering. There are different types of replications, depending on their purpose. Similar replications keep the experimental conditions as alike as possible to the original ones. External similar replications, where the replicating experimenters are not the same people as the original experimenters, have been a stumbling block. Several attempts at combining the results of replications have resulted in failure. Software engineering does not appear to be well suited to such replications, because it works with complex experimentally immature contexts. Software engineering settings have a large number of variables, and the role that many of them play is unknown. A successful (or useful) similar replication helps to better understand the phenomenon under study by verifying results and/or identifying contextual variables that could influence (or not) the results, through the combination of experimental results. Objective: To be able to get successful similar replications, there needs to be interaction between original and replicating experimenters. In this paper, we propose an interaction process for achieving successful similar replications. Method: This process consists of: an adaptation meeting, where experimenters tailor the experiment to the new setting; querying, to settle occasional inquiries while the experiment is being run; and a combination meeting, where experimenters meet to discuss the combination of replication outcomes with previous results. To check its effectiveness, the process has been tested on three different replications of the same experiment. Results: The proposed interaction process has helped to identify new contextual variables that could potentially influence (or not) the experimental results in the three replications run. Additionally, the interaction process has helped to uncover certain problems and deviations that occurred during some of the replications that we would have not been aware of otherwise. Conclusions: There are signs that suggest that it is possible to get successful similar replications in software engineering experimentation, when there is appropriate interaction among experimenters.This work has been performed under research Grant TIN2011-23216 of the Spanish Ministry of Science and Innovation.Juristo, N.; Vegas, S.; Solari, M.; Abrahao Gonzales, SM.; Ramos, I. (2013). A process for managing interaction between experimenters to get useful similar replications. Information and Software Technology. 55(2):215-225. https://doi.org/10.1016/j.infsof.2012.07.016S21522555