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De Fatima Souza Salomon Benfatti E.,Federal University of Itajuba | De Fatima Souza Salomon Benfatti E.,Institute Engineering Of Producao E Gestao | De Cassia Magalhaes Trindade Stano R.,Federal University of Itajuba
Gestao e Producao | Year: 2010

The objective of this article is to analyze data obtained from a higher education institution (HEI), and it is focused on the evaluation of the use of distance education or distance learning (DL) in the training of production engineers. This study highlights some issues such as the break of paradigms by the institution; the interest and availability of professors in this type of teaching; and the opinion of the students about the teaching-learning process. The analysis of data indicated the need to encourage reflection on the results. Thus, this research aimed at observing and investigating another HEI with consolidated distance learning structure and function. At first, there was interest in making a comparison between the two educational institutions, but the evaluation of the data suggested the effectiveness of DL in the teaching-learning process. Source


Faundez-Abans M.,Laboratorio Nacional Of Astrofisica | De Oliveira-Abans M.,Laboratorio Nacional Of Astrofisica | De Oliveira-Abans M.,Institute Engineering Of Producao E Gestao | Krabbe A.C.,University of Paraiba Valley | And 3 more authors.
Astronomy and Astrophysics | Year: 2013

Aims. We investigate the nature of the galaxy pair FM047-02, which has been proposed as an archetype of the Solitaire types of peculiar (collisional) ring galaxies. Methods. The study is based on long-slit spectrophotometric data in the range of 3500-9500 Å obtained with the GeminiMulti-Object Spectrograph at Gemini South (GMOS-S). The absorption spectra were used to determine the radial velocity. The stellar population synthesis code STARLIGHT was used to investigate the star formation history of the galaxy pair FM047-02. Results. During the whole long-slit signal, the spectra of both galaxies resemble those of an early-type galaxy. Both objects are dominated by an old stellar population of 2 × 109 > t ? 13 × 109 yr and a small, but a non-negligible fraction (about 13%) of young stars of t ? 5 × 107 yr are estimated to contribute to the optical flux for NED02. Both observed small radial-velocity differences, and the structures around NED01 suggest an ongoing tidal interaction of both galaxies. Conclusions. The spectroscopic results and the morphological peculiarities of NED01 can be adequately interpreted as continuing off-center stage of interaction with the companion galaxy NED02. The core of NED01 and NED02 are in counter-rotating motion. The visual appearance of NED01, its kinematical properties, the smooth distribution of material in the ring, and its off-centered nucleus, characterize it as a true archetype of a Solitaire-type ring galaxy in an advanced stage of ring formation. © ESO 2013. Source


Faundez-Abans M.,Mcti Laboratorio Nacional Of Astrofisica | Krabbe A.C.,University of Paraiba Valley | De Oliveira-Abans M.,Mcti Laboratorio Nacional Of Astrofisica | De Oliveira-Abans M.,Institute Engineering Of Producao E Gestao | And 4 more authors.
Astronomy and Astrophysics | Year: 2012

Aims. We report first results of an investigation of the tidally disturbed galaxy system AM546-324, whose two principal galaxies 2MFGC04711 and AM0546-324 (NED02) were previously classified as interacting doubles. This system was selected to study the interaction of ellipticals in a moderately dense environment. We provide spectral characteristics of the system and present an observational study of the interaction effects on the morphology, kinematics, and stellar population of these galaxies. Methods. The study is based on long-slit spectrophotometric data in the range of ∼4500-8000 Å obtained with the Gemini Multi-Object Spetrograph at Gemini South (GMOS-S). We have used the stellar population synthesis code STARLIGHT to investigate the star formation history of these galaxies. The Gemini/GMOS-S direct r-G0303 broad band pointing image was used to enhance and study fine morphological structures. The main absorption lines in the spectra were used to determine the radial velocity. Results. Along the whole long-slit signal, the spectra of the Shadowy galaxy (discovered by us), 2MFGC 04711, and AM0546-324 (NED02) resemble that of an early-type galaxy. We estimated redshifts of z = 0.0696, z = 0.0693 and z = 0.0718, corresponding to heliocentric velocities of 20 141 km s -1, 20 057 km s -1, and 20 754 km s -1 for the Shadowy galaxy, 2MFGC 04711 and AM0546-324 (NED02), respectively. The central regions of 2MFGC04711 and AM0546-324 (NED02) are completely dominated by an old stellar population of 2 × 10 9 < t = 13 × 10 9 yr and do not show any spatial variation in the contribution of the stellar-population components. Conclusions.The observed rotation profile distribution of 2MFGC 04711 and AM0546-324 (NED02) can be adequately interpreted as an ongoing stage of interaction with the Shadowy galaxy as the center of the local gravitational potential-well of the system. The three galaxies are all early-type. The extended and smooth distribution of the material in the Shadowy galaxy is a good laboratory to study direct observational signatures of tidal friction in action. © 2012 ESO. Source


Faundez-Abans M.,Mcti Laboratorio Nacional Of Astrofisica | Da Rocha-Poppe P.C.,Novo A/S | Fernandes-Martin V.A.,Novo A/S | De Oliveira-Abans M.,Mcti Laboratorio Nacional Of Astrofisica | And 4 more authors.
Astronomy and Astrophysics | Year: 2013

Aims. We report detailed morphological and kinematical insights into the disturbed galaxy FM 287-14, which is reported in the literature as a member of strongly interacting galaxies with a clear case of mergers. The main purpose of this paper is to provide a first observational study of this double-nuclei object based on photometry and spectroscopy. Methods. The study is based on BVR photometry with the 1.6-m telescope at OPD, and long-slit spectroscopy with Gemini South's GMOS spectrograph, with two-gratings centered at 5 011 Å and 6 765 Å. Image enhancement techniques were applied to the direct images, and the main lines in the spectra were used to determine the radial velocity. Line ratios and color-color diagnostic diagrams helped determine the nature of this object. Results. The external NE section is populated with well-defined H ii regions and is bluer than the SW region with less evidence of H ii regions. A double nucleus has been identified. The (B-R) × (B-V) diagram shows that the main nucleus is redder than the second one; the internal "ring-like" structure is redder than the external one. The main object redshift is z = 0.0311, corresponding to a line-of-sight velocity of 9334 km s-1 (a distance of 133.3 Mpc), and the second nucleus has a redshift of z = 0.0310, corresponding to a line-of-sight velocity of 9300 km s -1 (a distance of 132.9 Mpc). Both nuclei show characteristics of early-type galaxies, but the main one also shows modest emission evidence of the [N ii]λ6583 line. Conclusions. The peculiarities of FM 287-14 can be adequately interpreted as an ongoing merging-stage of interaction of the main object with a companion galaxy. © 2013 ESO. Source

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