Vida e Obra dos Boticários Portugueses dos Séculos XV e XVI

Projeto de Pós-Graduação/Dissertação apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Ciências Farmacêuticas

Las órdenes religiosas de España y la colonización de América en la segunda parte del siglo XVIII : estadístacas y otros documentos

http://www.archive.org/details/bordenesreligiosas01maasrich/

Aspectos climáticos y agroclimáticos inéditos o poco difundidos sobre la temperatura mínima en la Argentina durante el siglo XX

p.21-34

Un nuevo perfil para los profesionales en ciencias agrarias del próximo siglo

p.199-212

Problemas comentados (XVI)

En estos momentos hay una gran actividad en las escuelas canarias alrededor de la resolución de problemas. Un objetivo importante en el aprendizaje de las matemáticas es el de "elaborar estrategias de identificación y resolución de problemas en los diversos campos del conocimiento y la experiencia, mediante procedimientos intuitivos y de razonamiento lógico, contrastándolas y reflexionando sobre el proceso seguido." La resolución de ejercicios y problemas es un proceso clave en la enseñanza de las matemáticas, mediante el cual los alumnos experimentan la potencia y la utilidad de las matemáticas en el mundo que los rodea.

Construcción de la recta tangente variacional a traves de los usos del conocimiento del siglo XVII y XVIII

El presente trabajo es una investigación en curso. Una fuente de dificultades didácticas es la interpretación geométrica de la derivada, en donde la recta tangente no se considera como objeto de estudio. Nuestro planteamiento es que al construir la recta tangente desde una perspectiva variacional puede servir como una introducción a la derivada desde un punto de vista gráfico, lo cual implica también un rediseño del Discurso Matemático Escolar. Utilizamos la teoría de la Socioepistemología, en la cual se plantea que el uso de herramientas matemáticas para resolver actividades organizadas intencionalmente con la intención de resolver un problema, son una práctica, normadas por una práctica social. El escenario histórico nos ha servido para reconocer la práctica de la tangente variacional. Actualmente hemos implementado un método para obtener nuestros datos el cual nos servirá para que un futuro próximo podamos analizarlos y obtener conclusiones.

Contenidos matemáticos en la segunda enseñanza española del siglo XX

En este articulo ofrecemos una panorámica de los contenidos de los programas oficiales de matemáticas en la segunda enseñanza española de este siglo, así como las formas en las que un conjunto de libros de texto han presentado a los alumnos ciertos temas que hemos seleccionado: longitud de la circunferencia, área del circulo, área de la superficie esférica, volumen de la esfera, números negativos y noción de limite.

Planteamiento y resolución de problemas: ¿es relevante Polya para las matemáticas escolares del siglo XXI?

Se escribe dos tareas matemáticas enriquecedoras, adecuadas para los últimos cursos de primaria y primero de secundaria, dándose cinco características que deben tener las tareas "fértiles" de planteamiento y resolución de problemas.

Reality Shows in Chile, origin and road map. Historical-Communication Dialogues

Reality shows are TV programs which represent a format used in television nowadays; however, the observation practices of individual and/or group intimacy dates from thousands years ago. Sometimes this was driven by voyeurism or morbid fascination, some others, by the purpose of guarding, supervising and maintaining status quo. This work offers an alternative answer to the explanation of this type of TV program emergence and relates this appearance to a government procedure bound up with modern State terrorism which began at the end of the eighteenth century and has been recalled by different regimes until present days.

Energy levels and radiative rates for transitions in Ni XIII-Ni XVI

Energy levels and radiative rates for fine-structure transitions in nickel ions (Ni XIII-XVI) have been calculated using the GRASP code. Configuration interaction and relativistic effects have been included, and comparisons are made with available data. Energy levels and radiative rates are tabulated for transitions among the 48, 43, 32, and 84 levels of Ni XIII, Ni XIV, Ni XV, and Ni XVI, respectively. The energy levels are assessed to be accurate to better than 5% for a majority of levels, while oscillator strengths for all strong transitions are accurate to better than 20%. (C) 2003 Published by Elsevier Inc.

Inner-shell photoexcitation of Fe XV and Fe XVI

The configuration-interaction method as implemented in the computer code CIV3 is used to determine energy levels, electric dipole radiative transition wavelengths, oscillator strengths and transition probabilities for inner-shell excitation of transitions in Fe XV and Fe XVI. Specifically, transitions are considered of the type 1s(2) 2s(2) 2p(6) 3s(2) -1s(2) 2s(2) 2p(5) 3l3l' 3l" (l, l' and l" = s,p or d) in FeXV and 1s(2) 2s(2) 2p(6) 3s- 1s(2) 2s(2) 2p(5) 3l3l' (l and l' = s,p or d) in FeXVI, using the relativistic Breit-Pauli approach. An assessment of the accuracy of the derived atomic data is performed.

Energy levels and radiative rates for Li-like Ar XVI and Fe XXIV

Energy levels for transitions among the lowest 24 fine- structure levels belonging to the 1s(2)nl(n greater than or equal to 5) configurations of Li-like Ar XVI and Fe XXIV have been calculated using the fully relativistic GRASP code. Oscillator strengths, radiative rates and line strengths have also been generated among these levels for the four types of transitions: electric dipole (E1), magnetic dipole (M1), electric quadrupole (E2) and magnetic quadrupole (M2). Comparisons are made for the electric dipole transitions with other available results, and the accuracy of the present data is assessed.

Electron impact excitation of Fe XVI: radiative and excitation rates

Aims. In this paper we report calculations for energy levels, radiative rates, collision strengths, and effective collision strengths for transitions in Fe XVI. Methods. For energy levels and radiative rates we have used the General purpose Relativistic Atomic Structure Package ( grasp), and for the compuations of collision strengths the Dirac Atomic R-matrix Code (darc) has been adopted. Results. Energies for the lowest 39 levels among the n

An investigation of Fe XVI emission lines in solar and stellar extreme-ultraviolet and soft X-ray spectra

New fully relativistic calculations of radiative rates and electron impact excitation cross-sections for Fe XVI are used to determine theoretical emission-line ratios applicable to the 251-361 and 32-77 angstrom portions of the extreme-ultraviolet (EUV) and soft X-ray spectral regions, respectively. A comparison of the EUV results with observations from the Solar Extreme-Ultraviolet Research Telescope and Spectrograph (SERTS) reveals excellent agreement between theory and experiment. However, for emission lines in the 32-49 angstrom portion of the soft X-ray spectral region, there are large discrepancies between theory and measurement for both a solar flare spectrum obtained with the X-Ray Spectrometer/Spectrograph Telescope (XSST) and for observations of Capella from the Low- Energy Transmission Grating Spectrometer (LETGS) on the Chandra X-ray Observatory. These are probably due to blending in the solar flare and Capella data from both first-order lines and from shorter wavelength transitions detected in second and third order. By contrast, there is very good agreement between our theoretical results and the XSST and LETGS observations in the 50-77 angstrom wavelength range, contrary to previous results. In particular, there is no evidence that the Fe XVI emission from the XSST flare arises from plasma at a much higher temperature than that expected for Fe XVI in ionization equilibrium, as suggested by earlier work.