Hidden starburst in Seyfert 1 Galaxies

We report the detection of the 3.3 mu Polycyclic Aromatic Hydrocarbon (PAH) feature in two Seyfert 1 galaxies - NGC 3227 and Mrk 766, and one QSO - Mrk 478, observed with SpeX at IRTF at a spectral resolution not previously attained for this type of objects. Except for NGC 3227, this is the first time that the 3.3 mu PAH emission is detected in Mrk 766 and Mrk 478. The widths of the emission, reported also for the first time, are rather similar, ranging from 450 A to 550 A. The luminosity of the 3.3 mu PAH emission measured in the QSO Mrk 478 places it at a level similar of that found in starburst and infrared luminous galaxies and implies that this object is having a vigorous burst of star formation. The spatial resolution of the spectra allows us to constrain the location of the star-forming region to the inner 1 Kpc for the QSO and 150 pc for the Seyferts. Our results support the idea that these objects resides in molecular gas-rich galaxies and that their observed infrared excess is primarily due to star formation, as previously indicated by CO and H_2 observations. We also report, for Mrk 1239, the presence of a broad emission feature centred at 3.43 mu, not previosly detected in an extragalactic object and whose origin is not yet clear.Comment: 5 pages, 1 figure. Accepted to MNRAS pink page

The near-infrared spectrum of Mrk 1239: direct evidence of the dusty torus?

We report 0.8-4.5 micron SpeX spectroscopy of the narrow-line Seyfert 1 galaxy Mrk1239. The spectrum is outstanding because the nuclear continuum emission in the near-infrared is dominated by a strong bump of emission peaking at 2.2 micron, with a strength not reported before in an AGN. A comparison of the Mrk1239 spectrum to that of Ark564 allowed us to conclude that the continuum is strongly reddened by E(B-V)=0.54. The excess of emission, confirmed by aperture photometry and additional NIR spectroscopy, follows a simple blackbody curve at T=1200 K. This suggest that we may be observing direct evidence of dust heated near to the sublimation temperature, likely produced by the putative torus of the unification model. Although other alternatives are also plausible, the lack of star formation, the strong polarization and low extinction derived for the emission lines support the scenario where the hot dust is located between the narrow line region and the broad line region.Comment: 5 pages, 3 figures. Accepted to MNRAS letter

Extended Coronal Emission Lines in Active Galactic Nuclei

VLT and NTT spectra are used to examine the nuclear and extended coronal line emission in a sample of well-known Seyfert 1 and 2 galaxies. The excellent spatial resolution obtained with VLT allowed us to map [SiVI] 1.963 $\mu$m and [SiVII] 2.48 $\mu$m on scales of up to 20 pc. Coronal line emission, extended to distances of $\sim$100 pc, is detected in some of the lines analyzed, particularly in [FeX] 6374\AA, [FeXI] 7891\AA, and [SiVII] 2.48$\mu$m. Most coronal lines are strongly asymmetric towards the blue and broader than low-ionization lines. This result is particularly important for Circinus, where previous observations had failed at detecting larger widths for high-ionization lines. Photoionization models are used to investigate the physical conditions and continuum luminosities necessary to produced the observed coronal emission. We found that an ionization parameter U> 0.10 is necessary to reproduce the observations, although the clouds should be located at distances < 30 pc.Comment: 4 pages, 6 figures, to appear in proceedings of IAU Symposium No. 222, The Interplay Among Black Holes, Stars and ISM in Galacti Nucle

Development of a nano-Al/CuO based energetic material on silicon substrate

Nanoenergetic materials nEMs have improved performances compared to their bulk counterpart or microcounterpart. The authors propose an approach to synthesize an Al/CuO based nEM that has several advantages over previous investigations such as enhanced contact, reduced impurities and Al oxidation, tailored dimensions, and easier integration into microsystem. CuO nanowires are synthesized by thermally annealing Cu film deposited onto silicon. Nano-Al is integrated with the nanowires to realize an Al/CuO based nEM. The synthesized nEM is characterized by scanning electron microscopy, high resolution transmission electron microscopy, x-ray diffraction, differential thermal analysis, and differential scanning calorimetry

Core/Shell Structure of TiO2-Coated MWCNTs for Thermal Protection for High-Temperature Processing of Metal Matrix Composites

The production of metal matrix composites with elevated mechanical properties depends largely on the reinforcing phase properties. Due to the poor oxidation resistance of multiwalled carbon nanotubes (MWCNTs) as well as their high reactivity with molten metal, the processing conditions for the production of MWCNT-reinforced metal matrix composites may be an obstacle to their successful use as reinforcement. Coating MWCNTs with a ceramic material that acts as a thermal protection would be an alternative to improve oxidation stability. In this work, MWCNTs previously functionalized were coated with titanium dioxide (TiO2) layers of different thicknesses, producing a core-shell structure. Heat treatments at three different temperatures (500 degrees C, 750 degrees C, and 1000 degrees C) were performed on coated nanotubes in order to form a stable metal oxidestructure. The MWCNT/TiO2 hybrids produced were evaluated in terms of thermal stability., ermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy (RS), and X-ray photoelectron spectroscopy (XPS) were performed in order to investigate TiO2-coated MWCNT structure and thermal stability under oxidative atmosphere. It was found that the thermal stability of the TiO2-coated MWCNTs was dependent of the TiO2 layer morphology that in turn depends on the heat treatment temperature.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fed Univ Sao Paulo UNIFESP, Inst Sci & Technol, Lab Adv Met & Proc, Sao Jose Dos Campos, SP, BrazilFed Univ Sao Paulo UNIFESP, Inst Sci & Technol, Lab Adv Met & Proc, Sao Jose Dos Campos, SP, BrazilCNPq: 443395/2014-4Web of Scienc

Modelo predictivo para clasificación de clientes en la adquisición de productos financieros bancarios

Tomando como base que las campañas de marketing directo actuales que realizan las entidades financieras del sector bancario para la captación de futuros clientes son una situación de orden no controlado que se presenta en la gran mayoría de las empresas y que conlleva una defectuosa gestión de los recursos disponibles en el área (ya sea esfuerzo humano, llamadas telefónicas, tiempo, dinero, etc.), este proyecto propuso una solución desde el punto de vista tecnológico, de cómo podía una entidad financiera tener una mayor efectividad para futuras campañas de marketing directo. Con el estudio de este proyecto lo que se buscó, fue poder construir un modelo predictivo de aprendizaje supervisado que permitiera clasificar cuáles serían los posibles clientes que probablemente pudieran adquirir los productos financieros bancarios a largo plazo. Teniendo en cuenta que el objetivo del modelado era predecir los posibles clientes que deseaban adquirir el instrumento financiero ofrecido, se entrenaron algunos modelos supervisados referentes a la clasificación de negocio mediante técnicas de machine learning. El proyecto y los resultados mostrarán que la utilización de los modelos construidos para solucionar la ineficacia de las campañas tuvo gran valía. Estos modelos de machine learning fueron muy útiles como una herramienta para obtener ventajas competitivas mediante su implantación y uso, apoyando el máximo nivel de la organización. Esto a su vez supone tener una guía para direccionar las nuevas campañas mediante la implementación de marketing directo.#EntidadesFinancierasBased on the fact that the current direct marketing campaigns carried out by financial institutions in the banking sector to attract future customers are a situation of uncontrolled order that occurs in the vast majority of companies and leads to a defective management of the resources available in the area (whether human effort, phone calls, time, money, etc.), this project proposed a solution from the technological point of view, of how a financial institution could have a greater effectiveness for future direct marketing campaigns. The aim of this project was to build a predictive supervised learning model to classify which potential customers were likely to purchase the bank's financial products in the long term. Taking into account that the objective of the modeling was to predict the possible clients that would wish to acquire the financial instrument offered, some supervised models were trained regarding business classification by means of machine learning techniques. The project and the results will show that the use of the models built to solve the ineffectiveness of the campaigns had great value. These machine learning models were very useful as a tool to gain competitive advantage through their implementation and use, supporting the highest level of the organization. This in turn means having a guide to direct new campaigns through the implementation of direct marketing

El derecho a la participación en el contexto de la evaluación de impacto ambiental

La participación hace parte de la Evaluación de Impacto Ambiental desde su origen, siendo considerada parte fundamental e imprescindible de la misma. Sin embargo, en la literatura y la legislación nacional e internacional su definición, alcance, contenido y metodologías para implementarla son motivo de discusión y divergencia. Esta situación, ha sido identificada como uno de los mayores obstáculos para que la EIA pueda cumplir efectivamente su papel como herramienta nacional para la prevención de los impactos que los proyectos, obras o actividades de origen antropogénico pueden generar en el patrimonio ambiental. Teniendo en cuenta esta problemática, el presente trabajo busca fundamentar desde la teoría de la democracia y la teoría de los derechos, el concepto de Derecho a la Participación, ligándolo a la inclusión de todos los afectados, así como la vinculación obligatoria de sus voluntades respecto a la decisión final en el contexto del proceso de Evaluación de Impacto Ambiental. Igualmente, se analizan las posturas teóricas de la literatura especializada que sustentan tal conceptualización.Abstract. Participation is part of the Environmental Impact Assessment since its origin, being considered a fundamental and essential part of it. Nevertheless, in literature and national and international legislation its definition, scope, content and implementation methodologies are still under construction. This shortcoming has been identified as one of the major obstacles that impede EIA effectively fulfilling its role as a national tool to prevent the impacts that anthropogenic projects, works or activities can generate in the environmental heritage. Bearing in mind this problem, the aim of this document is to establish from democracy theory and rights theory, the concept of right to participation, bounding it to the inclusion of all those affected, as well as the mandatory linking of their wills in respect to the final decision in the context of Environmental Impact Assessment process. Likewise, the theoretical stances of specialized literature that support such conceptualization are analyzed.Maestrí