A FUSE View of the Stellar Winds of Planetary Nebula Central Stars

Since the IUE satellite produced a vast collection of high-resolution UV spectra of central stars of planetary nebulae (CSPNe), there has not been any further systematic study of the stellar winds of these stars. The high spectral resolution, sensitivity and large number of archival observations in the FUSE archive allow the study of the stellar winds of CSPNe in the far UV domain where lines of species spanning a wide excitation range can be observed. We present here a preliminary analysis of the P Cygni profiles of a sample of 60 CSPNe observed by FUSE. P Cygni profiles evidencing fast stellar winds with velocities between 200 and 4,300 km/s have been found in 40 CSPNe. In many cases, this is the first time that fast stellar winds have been reported for these PNe. A detailed study of these far-UV spectra is on-going.Comment: 4 pages, 3 figures; accepted, to appear in Publications of the Astronomical Society of Australi

Estado crítico de la investigación en la psicología ecuatoriana: el abandono de la estadística como base de la producción científica

This article reports a study that analyzed the role of statistics in the scientific production of Ecuadorian psychology based on a mixed methodology study. The sample included 410 participants (students and professionals of different cities of Ecuador). The findings on the quantitative phase included that liking and mastering statistical processes increase the probability of publishing a scientific article. Moreover, when negative belief variables and anxiety related to statistics have a higher score, the mastery of statistical processes and its use for the job of the psychologist decrease. On the qualitative phase, a significance emerged that allowed to better understand quantitative data, and to develop categories on statistics erroneous' believes, procedures, a negative predisposition towards learning statistics and others. The paper concludes by analyzing the scientific reality of Ecuadorian psychology and the need to carry out longitudinal research where it will be possible to restructure subjective constructions on the role of statistics in psychology

El préstamo lingüístico, uno de los principales procedimientos de creación neológica

En el presente trabajo pretendemos demostrar que el préstamo lingu?ístico es uno de los principales procedimientos de creación neológica tanto en el pasado como en la actualidad. Los préstamos, aunque con las reticencias lógicas por el empobrecimiento o arrinconamiento que el léxico patrimonial pueda sufrir, siempre han estado presentes en las lenguas. Prueba de ello es su aparición ya en el Tesoro de la lengua castellana o española de Sebastián de Covarrubias, primer diccionario monolingu?e con el que cuenta nuestra lengua

La lengua de la ciencia y de la técnica : niveles

Los términos especializados han inundado en la últimas decadas diccionarios, medios de comunicación y las propias conversaciones. En el caso del español, éste ha sabido adaptarse a los nuevos escenarios y públicos pero sin perder de vista al inglés que continúa siendo el idioma científico por antonomasia

La investigación actual en neología

Mesa Redonda: La investigación actual en neología Hispanistentag 2015 Coordina Gloria Guerrero Ramos: “Uso del léxico de origen especializado en la prensa” Participan Elisabet Llopart et alii: “El procesamiento de los neologismos: observaciones desde una perspectiva experimental” Carmen Sánchez Manzanares: “Caracterización pragmática de los neologismos semánticos” Érika Vega: “Nueva propuesta de criterios para determinar la neologicidad de una creación léxica” En los últimos años la investigación en neología ha sufrido un proceso de evolución muy acelerado. De ser en épocas pasadas un tema que no suscitaba gran interés, sino más bien cierto menosprecio, ha pasado a ser fundamental, ya que es la principal manera que tenemos de medir la vitalidad de las lenguas. De hecho, podemos afirmar que una lengua que carece de neología puede ser considerada una lengua muerta.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Direct Metal Laser Fabrication of Cu Slabs from Powder Precursor: Surface Depth of Melt and Furnace Temperature Issues

A DMLF processing unit based on a raster-scanned 80 W CO2 laser beam has been developed to process single layers of metallic powder precursor. The process chamber provides atmosphere control (high vacuum and inert gas refill) besides temperature elevation up to 700 o C. In this work, copper powder precursor is confined inside a refractory steel mask surrounded by an aluminum oxide jacket that acts as insulator. The powder layers can have thicknesses of 0,5 and 1 mm. An infrared pyrometer measures in real time the temperature at one location in the surface of the powder bed. Scan speed, scan step, and furnace temperature have been varied to find combinations of such parameters that render surface melting and maximum densification. Partially melted samples were produced and their mass density was measured. Micro-hardness and surface roughness were also measured along the resolidified surface, the first rendering an average of 80,6 HV compared to the 90-105 HV of oxygen free copper, while the second resulting in an 8 μm Ra value. Maximum melt of depth achieved is ~0,15 mm followed by a sintered layer.Mechanical Engineerin

The Political Biocentrism of Agency Network. A Model of Citizenship and the Common Space of Resistance

La práctica democrática y el ejercicio mismo de lo político devienen ambos en un sistema permanentemente inconcluso, abierto y dinámico, tal y como lo es el mismo callejón sin fin de la significación humana. Con ello en mente, en este texto se propone la dimensión biocéntrica de lo político como una nueva faceta de la ciudadanía democrática. Para dicho objetivo, en lo que atañe al plano de lo conceptual, se tomará la noción de disenso de Rancière y la agonística moufferiana para relacionarlas ambas con una ética-ontológica que contemple la vida como bien común universal y cuya agencia se mueve en una intrincada red o circuito de pluralidad. Se trata, por tanto, de establecer una relación teórico-filosófica encuadrada en las matrices de una ecosofía política que vincule la práctica ciudadana y la matriz hegemonía/resistencia con las gramáticas ecológicas de los regímenes de la vida.Democratic practice and the same exercise of politics, conform now a permanently unfinished, open and dynamic system, as it is the same dead end of the human significance. With this in mind, in this text the biocentric political dimension is proposed as a new facet of democratic citizenship. For this purpose, in respect to the plane of the conceptual, we will take the notion of dissensus of Rancière and the agonistic of Mouffe be taken to relate with an ontological ethics that contemplates life as universal common good and whose agency is mo-ving in an intricate circuit network of plurality. This text is intended, therefore, establish a theoretical and philosophical relationship between grammars of political ecosophy linking citizenship practice and hegemony / resistance matrix with grammars of the ecological regimes of life

Hidden IR structures in NGC 40: signpost of an ancient born-again event

We present the analysis of infrared (IR) observations of the planetary nebula NGC 40 together with spectral analysis of its [WC]-type central star HD 826. Spitzer IRS observations were used to produce spectral maps centred at polycyclic aromatic hydrocarbons (PAH) bands and ionic transitions to compare their spatial distribution. The ionic lines show a clumpy distribution of material around the main cavity of NGC 40, with the emission from [Ar II] being the most extended, whilst the PAHs show a rather smooth spatial distribution. Analysis of ratio maps shows the presence of a toroidal structure mainly seen in PAH emission, but also detected in a Herschel PACS 70 mic image. We argue that the toroidal structure absorbs the UV flux from HD 826, preventing the nebula to exhibit lines of high-excitation levels as suggested by previous authors. We discuss the origin of this structure and the results from the spectral analysis of HD 826 under the scenario of a late thermal pulse.Comment: 10 pages, 10 figures; Accepted to MNRA

WISE morphological study of Wolf-Rayet nebulae

We present a morphological study of nebulae around Wolf-Rayet (WR) stars using archival narrow-band optical and Wide-field Infrared Survey Explorer (WISE) infrared images. The comparison among WISE images in different bands and optical images proves to be a very efficient procedure to identify the nebular emission from WR nebulae, and to disentangle it from that of the ISM material along the line of sight. In particular, WR nebulae are clearly detected in the WISE W4 band at 22 $\mu$m. Analysis of available mid-IR Spitzer spectra shows that the emission in this band is dominated by thermal emission from dust spatially coincident with the thin nebular shell or most likely with the leading edge of the nebula. The WR nebulae in our sample present different morphologies that we classified into well defined WR bubbles (bubble ${\cal B}$-type nebulae), clumpy and/or disrupted shells (clumpy/disrupted ${\cal C}$-type nebulae), and material mixed with the diffuse medium (mixed ${\cal M}$-type nebulae). The variety of morphologies presented by WR nebulae shows a loose correlation with the central star spectral type, implying that the nebular and stellar evolutions are not simple and may proceed according to different sequences and time-lapses. We report the discovery of an obscured shell around WR35 only detected in the infrared.Comment: 11 pages, 6 figures, plus 23 appendix figures; to appear in Astronomy and Astrophysic