463 research outputs found
Detection of magnetic moment in thin films with a home-made vibrating sample magnetometer
This paper explores the optimization of an array of pick-up coils in a home-made vibrating sample magnetometer for the detection of magnetic moment in thin films. Sensitivity function of a 4-coils Mallinson configuration was numerically studied for the determination of the physical dimensions that enhance the sensitivity of the magnetometer. By performing numerical simulations using the Biot-Savart law combined with the principle of reciprocity we were able to determine the maximum values of sensitivity and the influence of the separation of the coils on the sensitivity function. After the optimization of the pick-up coils, the vibrating sample magnetometer was able to detect the magnetic moment of a 100 nm-thickness Fe19Ni81 magnetic thin film along and perpendicular to the in-plane anisotropy easy axis. The implemented vibrating sample magnetometer is able to detect changes in the magnetic moment of ∼2 × 10-4 emu.Fil: Jordán, D.. Universidad Nacional de Ingeniería. Facultad de Ciencias; PerúFil: González Chávez, D.. Centro Brasileiro de Pesquisas Físicas; BrasilFil: Laura, D.. Universidad Nacional de Ingeniería. Facultad de Ciencias; PerúFil: Leon Hilario, Ludwin Misael. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Ingeniería. Facultad de Ciencias; PerúFil: Monteblanco, E.. Universite de Lorraine; FranciaFil: Gutarra Espinoza, Abel. Universidad Nacional de Ingeniería. Facultad de Ciencias; PerúFil: Aviles Felix, Luis Steven. Comision Nacional de Energía Atómica. Gerencia de Área Investigaciones y Aplicaciones no Nucleares. Gerencia de Física (Centro Atómico Bariloche). División Resonancias Magnéticas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
An Assessment for Roughhead Grenadier (Macrourus berglax) in NAFO Subareas 2 and 3.
It has been recognised that the recent catches of grenadiers by EU-Portugal and EU-Spain in Subarea 3,
previously reported to NAFO as roundnose grenadiers, correspond to roughhead grenadier. Roughhead grenadier is
taken as by-catch in the Greenland halibut fishery in the Regulatory Area mainly in Divisions 3LMN. Catches
increased gradually and the largest proportion by country correspond to Spain and Portugal, with 6050 t. and 1089 t.
respectively in 1998.
A review of the biomass estimates from the available research surveys in Subareas 2 and 3 is presented.
According to the Canadian fall surveys, it seems that the main part of the stock shifted from the northern Divisions
(2GJand 3K) to the southern ones (3LN), and to greater depths (beyond 1000 m.) since early 90s. A review of the
biological information available for this stock is also presented. Mean lengths (preanal fin lengths) of the catches
show no decreasing trend since 1995. The age o fully recruitment to the fishery is 8, and the total mortality estimate
(1997-1998) is Z = 0.43. Female age at maturity is 15, corresponding to a PFL of 26.5 cm.
The Canadian fall survey series seems to be the best input for the assessment of this stock. At present the
higher part of biomass is found in Div. 3L and 3N and at depths between 1000-1200 m. A yield per recruit has
been performed using the input data presented in table 13. The partial recruitment vector comes from Cárdenas et
al. (1995), The maturity curve at age from Murua and Motos (1997) and the mean weight at age from the 1998 agelength
key. M is assumed as constant through the ages with a value of 0.2. The results of the yield per recruit
analysis appears in Fig. 6. The estimated Fmax is 0.27 and F0.1 is 0.13. However it must be noted that this output is
sensitive to possible changes in M, as if for instance M would be different between sexes, as suggest the results
from Murua et al. (1999) and as it has been shown in the Greenland halibut (Anon. 1998).
Any decreasing trend in the mean lengths, that would be an index of an excessive fishing pressure, is
observed in the mean lengths of the catches since 1995 up to now. The available time series of catches at age is too
short to analyse trends in the SSB, however it can be noted that only a 18 % and 10 % percent of the 1997 and
1998 catches respectively were above the female age at maturity (15 years). We have scarce information at the
moment to assess an appropriate exploitation level, though survey series shows that at the current exploitation rate
the biomass is increasing since 1994
Spanish Research Report for 1998
11 páginas, 9 tablasPeer reviewe
Costos de producción y su influencia en la rentabilidad de la empresa Convertidora Continental E.I.R.L., del distrito El Porvenir, 2016 - 2017
El autor no autorizó la publicación de la tesis
Innovar en las aulas universitarias
AFOEVersión del edito
Adam Zagajewski’s aesthetics of the sublime (Longinus)
En este trabajo se muestra cómo algunas de las ideas fundamentales formuladas por Longino
en su tratado Sobre lo sublime están presentes en la estética de Adam Zagajewski. Se presta
especial atención a tres aspectos: a) el concepto de lo sublime y la definición de la poesía,
b) la estética de la recepción y c) el papel que la inspiración desempeña en la creatividad.In this paper it is shown how some
of the main ideas formulated by Longinus in his treatise On the Sublime are present in the
aesthetics of Adam Zagajewski. Special attention is paid to: a) the concept of the sublime
and the definition of poetry, b) the aesthetics of reception, and c) the role that inspiration
plays in creativity
Spanish Research Report for 1999
14 páginas, 18 tablasPeer reviewe
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