Some aspects of geological information contained in LANDSAT images

The characteristics of MSS images and methods of interpretation are analyzed from a geological point of view. The supportive role of LANDSAT data are illustrated in several examples of surface expressions of geological features, such as synclines and anticlines, spectral characteristics of lithologic units, and circular impact structures

Remote sensing as a mineral prospecting technique

Remote sensing and its application as an alternative technique to mineral resource exploration are reviewed. Emphasis is given here to the analysis of the three basic attributes of remote sensing, i.e., spatial attributes related to regional structural mapping, spectral attributes related to rock discrimination and seasonal attributes related to geobotanic anomalies mapping, all of which are employed in mineral exploration. Special emphasis is given to new developments of the Thematic Mapper of the LANDSAT-5, principally with reference to the application of the bands 1.6 and 2.2 microns to map hydrothermally altered rocks and the band of red and blue shift to geobotanical anomalies mapping

Cashmere x creole kids yield carcass and body component at weaning

Cashmere x Creole kids were slaughtered at weaning with 14.8 kg of live weight. The skin, head, feed, blood, full and empty digestive tract, heart, liver kidney, lung plus trachea, hot carcass with and without head, eye loin area and carcass length were determinate. It were calculated the empty body weight, commercial, true and body component yield. The average and variation coefficient were calculated. The hot carcass weight, with and without head were 7.36 ± 0.45 and 6.47 ± 0.42 kg, respectively. The commercial, true and by product were 43.82 ± 2.09; 50.22 ± 1.85 and 11.15 ± 0.98 percent, respectively.Se evaluó el rendimiento de canal y componentes corporales de cabritos Cashmere x Criollos faenados con 14,8 kg de peso vivo. Se determinó el peso del cuero, cabeza, patas, sangre, tracto digestivo lleno y vacío, corazón, hígado, riñones, pulmón más tráquea, canal caliente con y sin cabeza, área de ojo lomo y largo de canal. Con la información obtenida se calculó: peso vivo destarado, rendimiento comercial, verdadero y componentes corporales. Se calculó el promedio y coeficiente de variación. El peso de canal caliente con y sin cabeza fue de 7,36 ± 0,45 y 6,47 ± 0,42 kg respectivamente. El rendimiento comercial, verdadero y de subproductos fue de 43,82 ± 2,09; 50,22 ± 1,85 y 11,15 ± 0,98 p.100, respectivamente

Single Stellar Populations in the Near-Infrared - I. Preparation of the IRTF spectral stellar library

We present a detailed study of the stars of the IRTF spectral library to understand its full extent and reliability for use with Stellar Population (SP) modeling. The library consist of 210 stars, with a total of 292 spectra, covering the wavelength range of 0.94 to 2.41 micron at a resolution R = 2000. For every star we infer the effective temperature (Teff), gravity (logg) and metallicity ([Z/Zsun]) using a full-spectrum fitting approach in a section of the K band (2.19 to 2.34 micron) and temperature-NIR colour relations. We test the flux calibration of these stars by calculating their integrated colours and comparing them with the Pickles library colour-temperature relations. We also investigate the NIR colours as a function of the calculated effective temperature and compared them in colour-colour diagrams with the Pickles library. This latter test shows a good broad-band flux calibration, important for the SP models. Finally, we measure the resolution R as a function of wavelength. We find that the resolution increases as a function of lambda from about 6 angstrom in J to 10 angstrom in the red part of the K-band. With these tests we establish that the IRTF library, the largest currently available general library of stars at intermediate resolution in the NIR, is an excellent candidate to be used in stellar population models. We present these models in the next paper of this series.Comment: 17 pages, 19 figures. Accepted for publication in Astronomy and Astrophysic

The general dielectric tensor for bi-kappa magnetized plasmas

In this paper we derive the dielectric tensor for a plasma containing particles described by an anisotropic superthermal (bi-kappa) velocity distribution function. The tensor components are written in terms of the two-variables kappa plasma special functions, recently defined by Gaelzer and Ziebell [Phys. Plasmas 23, 022110 (2016)]. We also obtain various new mathematical properties for these functions, which are useful for the analytical treatment, numerical implementation and evaluation of the functions and, consequently, of the dielectric tensor. The formalism developed here and in the previous paper provides a mathematical framework for the study of electromagnetic waves propagating at arbitrary angles and polarizations in a superthermal plasma.Comment: Accepted for publication in Physics of Plasma

NEETs in a rural region of Southern Europe: perceived self-efficacy, perceived barriers, educational expectations, and vocational expectations

The aim of this research is to understand the influence of demographic and professional experience factors on the self-efficacy and perceived barriers of rural Portuguese youths not in employment, education or training (NEET), as well as on their educational and vocational expectations at age 35. These indicators are involved in the compromise mechanism of choice of the circumscription and compromise theory, a construct that describes the reason why certain vocational alternatives are progressively restricted among young adults. Most of the participants (n?=?137) were female (62%) and their age ranged from 18 to 30 (M?=?24.88; SD?=?2.30). Findings show that the participants' self-efficacy was positively affected by having a previous job contract, and negatively influenced by longer unemployment periods (>24 months). Longer unemployment periods also increase the perception of barriers. Educational expectations at age 35 were significantly higher among participants who had completed middle school and marginally lower for those living with their parents, while vocational expectations at age 35 were more conservative among those who had concluded high school. Recommendations are made regarding employment policies as well as training and vocational guidance interventions for NEETs in rural regions