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Search Results: 1 - 10 of 15382 matches for " Christian; Soria "
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Sistema de asentamiento prehispánico en la Sierra Meridional de Cha?i (Salta, Argentina)
Vitry,Christian; Soria,Silvia S;
Andes , 2007,
Abstract: the area of research is located in the southern area of the cha?i mountain, salta province, argentina. the spatial and distributional structure of the archaeological sites and nearby mountain ranges has a great potential for research. these attributes, both qualitative and quantitative, allow the study of the variability and complexity of the settlement system in the region. our perspective is based in the evolution of the cultural landscape and the process of geopolitical change. the archaeological record reveals a recurrence in the settlement system, and we proposed a hypothetical model for the occupation of space in the regional development and inka periods. in this paper, different forms of power and possible emergent situations of social inequality are analyzed during these periods.
Sistema de asentamiento prehispánico en la sierra meridional de Cha i (Salta, Argentina)
Christian Vitry,Silvia S. Soria
Andes , 2007,
Abstract: El área de investigación se ubica en el sector meridional de la Sierra de Cha i, Provincia de Salta, República Argentina. La estructura espacial y distribucional de los sitios arqueológicos en el área de estudio y sistemas monta osos aleda os posee un gran potencial informativo. Estos atributos cualicuantitativos nos permiten estudiar la variabilidad y complejidad del sistema de asentamiento en la región. Nuestro abordaje parte desde las perspectivas de la evolución del paisaje cultural y el proceso de cambio geopolítico. El registro arqueológico presente en el área de estudio manifiesta una recurrencia con relación al sistema de asentamiento, para el cual proponemos un modelo hipotético de ocupación del espacio durante los períodos de Desarrollos Regionales e Inka. Durante estos períodos analizamos la interacción de las diferentes formas de poder y posibles situaciones emergentes de desigualdad social
Megahertz Schlieren Imaging of Shock Structure and Sound Waves in Under-Expanded, Impinging Jets
Christian Willert,Daniel Mitchell,Julio Soria
Physics , 2010,
Abstract: The accompanying fluid dynamics videos visualize the temporal evolution of shock structures and sound waves in and around an under-expanded jet that is impinging on a rigid surface at varying pressure ratios. The recordings were obtained at frame rates of 500 kHz to 1 Mhz using a novel pulsed illumination source based on a high power light emitting diode (LED) which is operated in pulsed current mode synchronized to the camera frame rate.
The ULX NGC 1313 X-2 : an optical study revealing an interesting behavior
Fabien Grisé,Manfred W. Pakull,Roberto Soria,Christian Motch
Physics , 2009, DOI: 10.1063/1.3149412
Abstract: We present a summary of our ongoing efforts to study one of the brightest ultraluminous X-ray source, NGC 1313 X-2. Despite a large coverage in the X-rays, much of the information we have about the source and its environment comes from optical wavelenghts. Here, we report on the properties of the stellar environment, and the differences in the optical counterpart between our two observing epochs (2003--2004 and 2007--2008). We summarize our ongoing program designed to look for radial velocity variations in the optical spectra and for photometric variability.
Radio lobes and X-ray hot spots of the extraordinary microquasar in NGC 7793
Roberto Soria,Manfred Pakull,Jess Broderick,Stephane Corbel,Christian Motch
Physics , 2009, DOI: 10.1063/1.3475162
Abstract: We have studied the newly-discovered microquasar in NGC 7793 in radio, optical and X-ray bands. This system comprises a large (250 x 120 pc) line-emitting optical nebula, detected in H-alpha and HeII 4686. The optical nebula coincides with a synchrotron-emitting radio cocoon, with a radio luminosity about 4 times that of Cas A. The central black hole appears as a hard X-ray source with a point-like, blue optical counterpart. Two prominent radio lobes are located at the extremities of the cocoon. Just ahead of the radio lobes, we found two X-ray hot spots, which we interpret as a signature of the bow shock into the interstellar medium. The X-ray hot spots, radio lobes, X-ray core and major axis of the cocoon are well aligned, proving that the system is powered by a jet. From the X-ray data, we estimate a jet power ~ a few times 10^{40} erg/s, active over a timescale ~10^{5} yrs. This extraordinary system is a long-sought analog of the Galactic microquasar SS 433.
El patrimonio arqueológico frente a las obras de trazado lineal: Caso gasoducto y CTCC Salta Termoandes S.A. (Cobos, Gral. Guemes, Salta)
Soria,Silvia; Vitry,Christian; Santoni,Mirta; Mulvany,Eleonora; Viveros,Federico; Mercado,Antonio; Mamaní,Mabel;
Cuadernos de la Facultad de Humanidades y Ciencias Sociales. Universidad Nacional de Jujuy , 2002,
Abstract: in the process of the construction of the salta termoandes thermoelectrical power station s.a. and its feeding gas pipe, we participate in one of the instances of the environmental impact studies and in an archaeological rescue. as a consequence of this experience, we present the results obtained, which include methodological aspects and the interpretation of the archaeological record localized and rescued. we, as professionals, should cover the necessities of the management of our archaeological heritage. in this direction, we should make an effort to adequate theory, methodology and technology in the solution of practical problems involved in all the stages of the e.i.s. we suggest the formation, in an academic level, of specialists who could develop both basic research and managment of archaeological resources.
Radio lobes and X-ray hot spots in the microquasar S26
Roberto Soria,Manfred W. Pakull,Jess W. Broderick,Stephane Corbel,Christian Motch
Physics , 2010, DOI: 10.1111/j.1365-2966.2010.17360.x
Abstract: We have studied the structure and energetics of the powerful microquasar/shock-ionized nebula S26 in NGC 7793, with particular focus on its radio and X-ray properties. Using the Australia Telescope Compact Array, we have resolved for the first time the radio lobe structure and mapped the spectral index of the radio cocoon. The steep spectral index of the radio lobes is consistent with optically-thin synchrotron emission; outside the lobes, the spectral index is flatter, suggesting an additional contribution from free-free emission, and perhaps ongoing ejections near the core. The radio core is not detected, while the X-ray core has a 0.3-8 keV luminosity ~6 x 10^{36} erg/s. The size of the radio cocoon matches that seen in the optical emission lines and diffuse soft X-ray emission. The total 5.5-GHz flux of cocoon and lobes is ~2.1 mJy, which at the assumed distance of 3.9 Mpc corresponds to about 3 times the luminosity of Cas A. The total 9.0-GHz flux is ~1.6 mJy. The X-ray hot spots (combined 0.3-8 keV luminosity ~2 x 10^{37} erg/s) are located ~20 pc outwards of the radio hot spots (ie, downstream along the jet direction), consistent with a different physical origin of X-ray and radio emission (thermal-plasma and synchrotron, respectively). The total particle energy in the bubble is ~10^{53} erg: from the observed radio flux, we estimate that only about a few 10^{50} erg are stored in the relativistic electrons; the rest is in protons, nuclei and non-relativistic electrons. The X-ray-emitting component of the gas in the hot spots contains ~10^{51} erg, and ~10^{52} erg over the whole cocoon. We suggest that S26 provides a clue to understand how the ambient medium is heated by the mechanical power of a black hole near its Eddington accretion rate.
Functional Vascular Smooth Muscle-like Cells Derived from Adult Mouse Uterine Mesothelial Cells
Christian Claude Lachaud, Daniela Pezzolla, Alejandro Domínguez-Rodríguez, Tarik Smani, Bernat Soria, Abdelkrim Hmadcha
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0055181
Abstract: In mammalian visceral organs, vascular smooth muscle cells (VSMCs) originate from an epithelial-to-mesenchymal transition (EMT) of embryonic mesothelial cells (MCs). The ability of adult MCs to recapitulate EMT and to acquire smooth muscle (SM) markers upon provasculogenic culture suggested they might retain embryonic vasculogenic differentiation potential. However, it remains unknown whether adult MCs-derived SM-like cells may acquire specific vascular SM lineage markers and the functionality of differentiated contractile VSMCs. Here, we describe how a gentle trypsinization of adult mouse uterine cords could selectively detach their outermost uterine mesothelial layer cells. As other MCs; uterine MCs (UtMCs) uniformly expressed the epithelial markers β-catenin, ZO-1, E-cadherin, CD54, CD29, and CK18. When cultured in a modified SM differentiation media (SMDM) UtMCs initiated a loss of epithelial characteristics and gained markers expression of EMT (Twist, Snail, and Slug), stem and progenitor (Nanog, Sox2, C-kit, Gata-4, Isl-1, and nestin), SM (α-SMA, calponin, caldesmon, SM22α, desmin, SM-MHC, and smoothelin-B) and cardiac (BMP2, BMP4, ACTC1, sACTN, cTnI, cTnT, ANF, Cx43, and MLC2a). UtMCs repeatedly subcultured in SMDM acquired differentiated VSM-like characteristics and expressed smoothelin-B in the typical stress-fiber pattern expression of contractile VSMCs. Relevantly, UtMCs-derived VSM-like cells could generate “mechanical force” to compact collagen lattices and displayed in diverse degree voltage (K+) and receptor (endothelin-1, oxytocin, norepinephrine, carbachol and vasopressin)-induced [Ca2+]i rises and contraction. Thus, we show for the first time that UtMCs could recapitulate in vitro differentiative events of early cardiovascular differentiation and transdifferentiate in cells exhibiting molecular and functional characteristics of VSMCs.
Grete Stern: imágenes del goce femenino
Mora (Buenos Aires) , 2010,
Abstract: informed by the theory of jouissance that freud, lacan and cixous elaborate, this paper explores the photographic series entitled "dreams" that grete stern publishes in buenos aires in idilio (1948-51). in a magazine aimed for a feminine audience of middle and low class, the series of this german graphic designer and photographer who arrives in buenos aires in 1935, illustrates the section called "psychoanalysis will help you." the section publishes the dreams that readers submit to the magazine so that richard rest (nickname for gino germani and enrique butelman) would give his interpretation. its is precisely following the path of the dreams as represented by grete stern that one can observe a solidarity between women's agency and the beginning of psychoanalytic practice in the culture of buenos aires.
Jesus Soria
International Journal of English Studies (IJES) , 2002, DOI: 10.6018/ijes.2.1.48601
Abstract: This article attenlpts to define the intimate relationship that is intended between c1assroon1-based and laboratory-based activities, between private study and language class, between individual and collective effort and between computer-centered and teacher-led learning. We tend to take it as an axiom o€ CALL that the place of IT is beside the teacher, its function complementary or suplementary. Typically. the teacher's role is usually one (occasionally just a couple) of these: designer, author, editor, tester, provider, trainer, checker or supervisor. Except when in a supervisory role, the teacher's role is taken over by the computer when the teacher's own activity stops. This is what we tend to call computer-aided instruction. In the vast majority of cases, the role of IT is extrinsic to the teacher's own activity. I shall try to demonstrate here that the aid that the coMputer is able to provide can be effectively brought right into the classroom as an integral, intrinsic part of the teacher's own activity and that, by doing so, it can enhance not only the teacher's activity but also the complementary role which is traditionally assigned to the computer. The processes described here were developed with a specific situation in mind, not atypical in, at least, British Higher Education: increased mixed ability and reduced teaching time. In a pedagogical context that, in spite of mission statement protestations, usually attempts to make the most of the average, they specifically target the lower and higher ability student ranges. New funding has been secured to continue with this research from September 2002.
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