Publications 1-12.

Ceased publication in 1850; of the works of Knox, volumes 1-2 only were pub. by the Society; volumes 3-6, by the publishers, 1854-64, to complete the edition.

Generation of optical frequency combs in fibres:an optical pulse analysis

The innovation of optical frequency combs (OFCs) generated in passive mode-locked lasers has provided astronomy with unprecedented accuracy for wavelength calibration in high-resolution spectroscopy in research areas such as the discovery of exoplanets or the measurement of fundamental constants. The unique properties of OCFs, namely a highly dense spectrum of uniformly spaced emission lines of nearly equal intensity over the nominal wavelength range, is not only beneficial for high-resolution spectroscopy. Also in the low- to medium-resolution domain, the OFCs hold the promise to revolutionise the calibration techniques. Here, we present a novel method for generation of OFCs. As opposed to the mode-locked laser-based approach that can be complex, costly, and difficult to stabilise, we propose an all optical fibre-based system that is simple, compact, stable, and low-cost. Our system consists of three optical fibres where the first one is a conventional single-mode fibre, the second one is an erbium-doped fibre and the third one is a highly nonlinear low-dispersion fibre. The system is pumped by two equally intense continuous-wave (CW) lasers. To be able to control the quality and the bandwidth of the OFCs, it is crucial to understand how optical solitons arise out of the initial modulated CW field in the first fibre. Here, we numerically investigate the pulse evolution in the first fibre using the technique of the solitons radiation beat analysis. Having applied this technique, we realised that formation of higherorder solitons is supported in the low-energy region, whereas, in the high-energy region, Kuznetsov-Ma solitons appear.

Sermons du R. Père Cheminais, de la Compagnie de Jesus /

Mode of access: Internet.

Bits of pasture, or, handfuls of grass for the Lord's hungry sheep : being selections from sermons of J.R. Miller /

Mode of access: Internet.

El primer plan del Fondo Nacional de Igualdad de Oportunidades : declaraciones del Comisario General de protección escolar, profesor Navarro Latorre.

Se exponen las impresiones del Comisario General de Protección Escolar y catedrático del Instituto Ramiro de Maeztu de Madrid, profesor Navarro Latorre, sobre la aprobación del Fondo Nacional de Igualdad de Oportunidades en 1960, en cuanto al órgano de aplicación, la campaña y el futuro de este Plan.

Propuesta did??ctica : trabajo de la motivaci??n y autonom??a a trav??s de la estructuraci??n r??tmico-expresiva

Se presenta una propuesta did??ctica del ??rea de educaci??n f??sica que pretende innovar en el tratamiento de la expresi??n corporal para lograr la motivaci??n del alumnado y del profesorado, introduciendo elementos de los juegos predeportivos. Trata de conseguir un contexto favorable para el desarrollo de la autonom??a del alumnado a partir de una metodolog??a emancipativa que favorece la toma de decisiones en la tareas motrices, la cooperaci??n y el di??logo con los compa??eros y compa??eras y otros aspectos decisivos del desarrollo integral del alumnado.

Desempenho zootécnico de girinos de rã-touro com diferentes níveis de proteína e energia digestíveis

A partir dos valores de digestibilidade de alguns ingredientes foram propostas dietas, com diferentes níveis de proteína e energia digestíveis, em esquema fatorial 3 x 3, destinadas a girinos de rã-touro para avaliar o desempenho zootécnico. O experimento, com duração de 60 dias, foi conduzido com 810 girinos, oriundos da mesma desova, distribuídos em 27 caixas de polipropileno, em uma densidade de 1girino/L. O delineamento experimental foi um esquema fatorial com três níveis de proteína digestível (27; 31 e 35%) e três níveis de energia digestível (2.700; 2.800 e 2.900kcal/kg) com três réplicas. Os parâmetros avaliados aos 60 dias foram ganho de peso, consumo da dieta, consumo em proteína da dieta, conversão alimentar, taxa de eficiência proteica e índice de sobrevivência. Os resultados foram submetidos à análise de variância e ao teste de Duncan (95% de precisão). Os resultados encontrados não apresentaram interação entre proteína e energia digestível para nenhum parâmetro avaliado. em relação à proteína digestível, foram verificadas diferenças nos parâmetros consumo em proteína da dieta e taxa de eficiência proteica (TEP), o que demonstra ineficiência das dietas com altos valores proteicos. Deve-se oferecer aos girinos de rã-touro dietas com 27% de proteína digestível, por apresentarem melhor resultado para taxa de eficiência proteica e para consumo em proteína da dieta.

Vibrational-rotational structure of supersingular plus Coulomb potential A/r4 - Z/r*

The vibrational-rotational states of the supersingular plus Coulomb potential A/r4 - Z/r are variationally constructed using a nonorthogonal basis of atomic hydrogenic eigenfunctions modulated by an exponential factor exp(- α/r), ensuring the correct behavior in the vicinity of the supersingularity. The construction is carried out in two successive stages. The first stage is restricted to trial functions without radial nodes, leading to a variational optimization of the parameters of the basis for each value of the angular momentum. The second stage uses the complete basis to construct linear trial functions and to formulate the variational problem in terms of secular equations, yielding the successive vibrational and rotational states. Numerical results for the corresponding energy levels are presented for different combinations of the intensity parameters of the potential. © 2001 Plenum Publishing Corporation.

Innovation, R and D investment and productivity in Chile

Includes bibliography