371 research outputs found
El Liderazgo como criterio de calidad en la educación inclusiva
El artículo presenta los resultados de un estudio que explora las competencias, aspectos o estrategias utilizadas en el ejercicio del liderazgo, relacionados con el Modelo de Excelencia de la EFQM, que
promueven y desarrollan buenas prácticas en centros
de orientación inclusiva. A partir de un diseño de investigación de estudios de casos, desarrollamos el trabajo de campo en cuatro centros públicos de Educación Secundaria Obligatoria, de la Comunidad
Autónoma de Andalucía (España), seleccionados por
desarrollar prácticas educativas de orientación inclusiva. Empleamos el análisis documental, cuestionarios y entrevistas en profundidad como estrategias de recogida de información. Entre los resultados obtenidos
destacamos que el desarrollo de buenas prácticas viene
determinado por la influencia que ejerce el liderazgo
directivo sobre el análisis de las necesidades de la comunidad educativa, las motivaciones del profesorado,
sus habilidades y capacidades profesionales, y las condiciones de trabajo en las cuales realizan sus labores
Metric versus observable operator representation, higher spin models
We elaborate further on the metric representation that is obtained by transferring the time-dependence from a Hermitian Hamiltonian to the metric operator in a related non-Hermitian system. We provide further insight into the procedure on how to employ the time-dependent Dyson relation and the quasi-Hermiticity relation to solve time-dependent Hermitian Hamiltonian systems. By solving both equations separately we argue here that it is in general easier to solve the former. We solve the mutually related time-dependent Schrödinger equation for a Hermitian and non-Hermitian spin 1/2, 1 and 3/2 model with time-independent and time-dependent metric, respectively. In all models the overdetermined coupled system of equations for the Dyson map can be decoupled algebraic manipulations and reduces to simple linear differential equations and an equation that can be converted into the non-linear Ermakov-Pinney equation
Food authentication by molecular methods
Quality and authenticity evaluation of foods encompasses many issues, such as the entire or partial fraudulent substitution
of higher commercial value constituents by others
with lower value and the presence of undeclared
constituents/ingredients. To protect consumers from misleading labeling, regulations issued across the world have
implemented specific guidelines and listed particular foods that sh
ould be declared on the label. Particularly in the case of
genetically modified foods, the introduc
tion of specific regulations for labeling
and traceability of genetically modified
organisms (GMO) aimed to protect human health and environment and to give the consumer an informed choice. To
address the referred food authenticity/safety problems, several analytical methodologies have been developed, particularly
in processed foods, including refined oil matrices. For the first
time, monitoring of amplifiable DNA in all the stages of a
chemical refining industrial unit of soyb
ean oil was succeeded by PCR techniques. Mo
reover, we have also proved that it
is possible to detect GM soybean along
the refining process of crude oil. The
study was also extended with success to
commercial refined oils produced from blends and pure soybean
Green manure in coffee systems in the region of Zona da Mata, Minas Gerais: characteristics and kinetics of carbon and nitrogen mineralization.
The use of green manure may contribute to reduce soil erosion and increase the soil organic matter content and N availability in coffee plantations in the Zona da Mata, State of Minas Gerais, in Southeastern Brazil. The potential of four legumes (A. pintoi, C. mucunoides, S. aterrimum and S. guianensis)to produce above-ground
biomass, accumulate nutrients and mineralize N was studied in two coffee plantations of subsistence farmers under different climate conditions. The biomass production of C. mucunoides was influenced by the shade of the coffee plantation.C. mucunoides tended to mineralize more N than the other legumes due to the low polyphenol content and polyphenol/N ratio. In the first year, the crop establishment of A. pintoi in the area took longer than of the other legumes, resulting in lower biomass production and N2 fixation. In the long term, cellulose was the main
factor controlling N mineralization. The biochemical characteristics, nutrient accumulation and biomass production of the legumes were greatly influenced by
the altitude and position of the area relative to the sun
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