195 research outputs found
Collective Improvisation: The Practice and Vision of Ingemar Lindh
No full textIngemar Lindh's research on the principles of collective improvisation and performance conceived as process announce an important development in the 20th-century tradition of the actor's work. After early studies with Étienne Decroux and working collaborations with Jerzy Grotowski, Eugenio Barba, and Yves Lebreton, Lindh founded the first laboratory theatre in Sweden in 1971, the Institutet för Scenkonst. His practice of collective improvisation is viewed in light of postdramatic concerns such as its resistance to fixed scores, directorial montage, and choreography as an organizing principle
Proximity and Innovation in Italian SMEs
No full textAbstract: In this paper we assess the relevance of both knowledge creation and diffusion processes in affecting Italian SMEs’ propensity to innovate. In doing so a knowledge production function (KPF) is estimated for a representative sample of small and medium manufacturing firms over the period 1998-2003. To account for endogeneity of R&D effort in the KPF, we estimate a Heckman selection model on R&D decisions and obtain two main results. First, we do not find the probability of being engaged in intramural R&D activities to be significantly related to firm size. Second, for those firms engaged in R&D activities, the intensity of R&D effort increases with firm size. Then, the KPF is estimated for three different samples of firms using a standard probit where the probability that SMEs will innovate depends upon intramural R&D effort, regional and industrial spillovers and a vector of interaction and control variables. The main results obtained from this second set of regressions are the following: first, we find the probability to innovate to be positively related to sectoral spillovers, the magnitude of such impact being decreasing in firms’ size. Second, knowledge diffusion via geographical proximity enhances the probability of the recipient firm to innovate only if it has an appropriate endowment of human capital.Innovation, knowledge, spillovers, firm size
Active Star Formation in the N11B Nebula in the Large Magellanic Cloud: A Sequential Star Formation Scenario Confirmed
No full textThe second largest H II region in the Large Magellanic Cloud, N11B has been surveyed in the near-IR. We present JHKs images of the N11B nebula. These images are combined with CO (1-->0) emission-line data and with archival New Technology Telescope and Hubble Space Telescope WFPC2 optical images to address the star formation activity of the region. IR photometry of all the IR sources detected is given. We confirm that a second generation of stars is currently forming in the N11B region. Our IR images show the presence of several bright IR sources that appear to be located toward the molecular cloud as seen from the CO emission in the area. Several of these sources show IR colors with young stellar object characteristics, and they are prime candidates to be intermediate-mass Herbig Ae/Be stars. For the first time, an extragalactic methanol maser is directly associated with IR sources embedded in a molecular core. Two IR sources are found at 2" (0.5 pc) of the methanol maser reported position. Additionally, we present the association of the N11A compact H II region to the molecular gas, where we find that the young massive O stars have eroded a cavity in the parental molecular cloud, typical of a champagne flow. The N11 region turns out to be a very good laboratory for studying the interaction of winds, UV radiation, and molecular gas. Several photodissociation regions are found.Fil: Barba, Rodolfo Héctor. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; ArgentinaFil: Rubio, Mónica. Universidad de Chile; ChileFil: Roth, Miguel R.. Observatories of the Carnegie Institution of Washington; ChileFil: Garcia, Jorge. Association of Universities for Research in Astronomy; Chil
Oligonucleotide microarray-based detection and genotyping of Plum pox virus
No full textPlum pox virus (PPV) is the most damaging viral pathogen of stone fruits. The detection and identification of its strains are therefore of critical importance to plant quarantine and certification programs. Existing methods to screen strains of PPV suffer from significant limitations such as the simultaneous detection and genotyping of several strains of PPV in samples infected with different isolates of the virus. A genomic strategy for PPV screening based on the viral nucleotide sequence was developed to enable the detection and genotyping of the virus from infected plant tissue or biological samples. The basis of this approach is a long 70-mer oligonucleotide DNA microarray capable of simultaneously detecting and genotyping PPV strains. Several 70-mer oligonucleotide probes were specific for the detection and genotyping of individual PPV isolates to their strains. Other probes were specific for the detection and identification of two or three PPV strains. One probe (universal), derived from the genome highly conserved 3 non-translated region, detected all individual strains of PPV. This universal PPV probe, combined with probes specific for each known strain, could be used for new PPV strain discovery. Finally, indirect fluorescent labeling of cDNA with cyanine after cDNA synthesis enhanced the sensitivity of the virus detection without the use of the PCR amplification step. The PPV microarray detected and identified efficiently the PPV strains in PPV-infected peach, apricot and Nicotiana benthamiana leaves. This PPV detection method is versatile, and enables the simultaneous detection of plant pathogens
G287.84-0.82: An infrared star cluster in the Carina nebula
No full textWe have studied the properties of an infrared cluster embedded in the gas and dust of the southern part of the Carina nebula (NGC 3372), where the probable existence of current star formation has already been predicted. We used mid-infrared (A and C bands) and near-infrared (JHKs) images from the Midcourse Space Experiment and the Two-Micron All-Sky Survey, respectively, combined with an optical Ha narrow-band filter image obtained at the Cerro Tololo Inter-American Observatory. The infrared star cluster has at least 17 members, and its parameters, radius and stellar density are in very good agreement with high- to intermediate-mass star formation scenarios. The detected infrared sources have roughly the same intrinsic infrared excess determined from their position in colour-colour and colour-magnitude diagrams, suggesting that these objects could be related to pre-main-sequence stars of high to intermediate mass. Furthermore, we present a low-dispersion spectrum of the LS 1883 (O9.5V) star located near the centre of the infrared cluster. The position of this object in the colour-colour and colour-magnitude infrared diagrams lies close to the reddening vector of a zero-age main-sequence O9V spectral-type star, and it seems to be the first star of this cluster to emerge. All these facts are consistent with the current star-forming scenarios associated with highly embedded star clusters.Fil: Hägele, Guillermo Federico. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Albacete Colombo, Juan Facundo. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Barba, Rodolfo Hector. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Universidad de La Serena; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Bosch, Guillermo Luis. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
A Hubble Space Telescope/NICMOS view of the prototypical giant H ii region NGC604 in M33
No full textWe present the first high-spatial-resolution nearinfrared (NIR) imaging of NGC604, obtained with the NICMOS camera onboard the Hubble Space Telescope (HST). These NICMOS broad-band images reveal new NIR point sources, clusters, and diffuse structures. We find an excellent spatial correlation between the 8.4 GHz radio continuum and the 2.2 µm nebular emission. Moreover, massive young stellar object candidates appear aligned with these radio peaks, reinforcing the idea that those areas are star-forming regions. Three different scaled OB associations are recognized in the NICMOS images. The brightest NIR sources in our images have properties that suggest that they are red supergiant stars, of which one was previously known. This preliminary analysis of the NICMOS images shows the complexity of the stellar content of the NGC604 nebula.Fil: Barba, Rodolfo Hector. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; ArgentinaFil: Maíz Apellániz, Jesús. Instituto de Astrofísica de Andalucía; EspañaFil: Pérez, Enrique. Instituto de Astrofísica de Andalucía; EspañaFil: Rubio, Mónica. Universidad de Chile; ChileFil: Bolatto, Alberto. University of Maryland; Estados UnidosFil: Fariña, Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Bosch, Guillermo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Walborn, Nolan Revere. Space Telescope Science Institute; Estados Unido
Andrés Bello : Estudios reunidos en conmemoración del centenario de su muerte (1865-1965)
No full textTabla de contenidos: La preocupación americana de Bello / Juan Carlos Ghiano. El clasicismo de Bello / Juan Carlos Ghiano. La concepción histórica de Bello / Enrique M. Barba. Las raíces del pensamiento gramatical de Bello / Emma Gregores. Contactos entre Bello y la Argentina, en los primeros años de la Revolución / Raúl H. Castagnino. Andrés Bello, humorista reprimido / Raúl H. Castagnino. Andrés Bello, traductor de Byron / María Clotilde Rezzano de Martini. Alexander von Humboldt y su legado en la América de Andrés Bello / Rodolfo E. Modern. Andrés Bello y la geografía / Juan A. Sidoti
Andrés Bello : Estudios reunidos en conmemoración del centenario de su muerte (1865-1965)
No full textTabla de contenidos: La preocupación americana de Bello / Juan Carlos Ghiano. El clasicismo de Bello / Juan Carlos Ghiano. La concepción histórica de Bello / Enrique M. Barba. Las raíces del pensamiento gramatical de Bello / Emma Gregores. Contactos entre Bello y la Argentina, en los primeros años de la Revolución / Raúl H. Castagnino. Andrés Bello, humorista reprimido / Raúl H. Castagnino. Andrés Bello, traductor de Byron / María Clotilde Rezzano de Martini. Alexander von Humboldt y su legado en la América de Andrés Bello / Rodolfo E. Modern. Andrés Bello y la geografía / Juan A. Sidoti
The Spitzer survey of the small magellanic cloud: Discovery of embedded protostars in the H II region NGC 346
No full textWe use Spitzer Space Telescope observations from the Spitzer Survey of the Small Magellanic Cloud (S3MC) to study the young stellar content of N66, the largest and brightest H II region in the SMC. In addition to large numbers of normal stars, we detect a significant population of bright, red infrared sources that we identify as likely to be young stellar objects (YSOs). We use spectral energy distribution (SED) fits to classify objects as ordinary (main-sequence or red giant) stars, asymptotic giant branch stars, background galaxies, and YSOs. This represents the first large-scale attempt at blind source classification based on Spitzer SEDs in another galaxy. We firmly identify at least 61 YSOs, with another 50 probable YSOs; only one embedded protostar in the SMC was reported in the literature prior to the S 3MC. We present color selection criteria that can be used to identify a relatively clean sample of YSOs with IRAC photometry. Our fitted SEDs indicate that the infrared-bright YSOs in N66 have stellar masses ranging from 2 to 17 M⊙, and that approximately half of the objects are stage II protostars, with the remaining YSOs roughly evenly divided between stage I and stage III sources. We find evidence for primordial mass segregation in the H II region, with the most massive YSOs being preferentially closer to the center than lower mass objects. Despite the low metallicity and dust content of the SMC, the observable properties of the YSOs appear consistent with those in the Milky Way. Although the YSOs are heavily concentrated within the optically bright central region of N66, there is ongoing star formation throughout the complex, and we place a lower limit on the star formation rate of 3.2 × 10-3 Ṁ yr-1 over the last ∼1 Myr.Fil: Simon, Joshua D.. California Institute of Technology; Estados UnidosFil: Bolatto, Alberto. University of California at Berkeley; Estados Unidos. University of Maryland; Estados UnidosFil: Whitney, Barbara A.. Space Science Institute; Estados UnidosFil: Robitaille, Thomas P.. University of St. Andrews; Reino UnidoFil: Shah, Ronak Y.. Boston University; Estados UnidosFil: Makovoz, David. California Institute of Technology; Estados UnidosFil: Stanimirović, Snežana. University of Wisconsin; Estados UnidosFil: Barba, Rodolfo Héctor. Universidad de La Serena; Chile. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; ArgentinaFil: Rubio, Mónica. Universidad de Chile; Chil
Active Luminous Blue Variables in the Large Magellanic Cloud
No full textWe present extensive spectroscopic and photometric monitoring of two famous and currently highly active luminous blue variables (LBVs) in the Large Magellanic Cloud (LMC), together with more limited coverage of three further, lesser known members of the class. R127 was discovered as an Ofpe/WN9 star in the 1970s but entered a classical LBV outburst in or about 1980 that is still in progress, thus enlightening us about the minimum state of such objects. R71 is currently the most luminous star in the LMC and continues to provide surprises, such as the appearance of [Ca ii] emission lines, as its spectral type becomes unprecedentedly late. Most recently, R71 has developed inverse P Cyg profiles in many metal lines. The other objects are as follows: HDE 269582, now a "second R127" that has been followed from Ofpe/WN9 to A type in its current outburst; HDE 269216, which changed from late B in 2014 to AF in 2016, its first observed outburst; and R143 in the 30 Doradus outskirts. The light curves and spectroscopic transformations are correlated in remarkable detail and their extreme reproducibility is emphasized, both for a given object and among all of them. It is now believed that some LBVs proceed directly to core collapse. One of these unstable LMC objects may thus oblige in the near future, teaching us even more about the final stages of massive stellar evolution.Fil: Walborn, Nolan R.. Space Telescope Science Institute; Estados Unidos. Staff Astronomer; Estados UnidosFil: Gamen, Roberto Claudio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico "El Leoncito". Universidad Nacional de Córdoba. Complejo Astronómico "El Leoncito". Universidad Nacional de la Plata. Complejo Astronómico "El Leoncito". Universidad Nacional de San Juan. Complejo Astronómico "El Leoncito"; ArgentinaFil: Morrell, Nidia Irene. Carnegie Observatories; ChileFil: Barba, Rodolfo Hector. Universidad de La Serena; Chile. Las Campanas Observatory; Chile. European Southern Observatory; EspañaFil: Fernandez Lajus, Eduardo Eusebio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico "El Leoncito". Universidad Nacional de Córdoba. Complejo Astronómico "El Leoncito". Universidad Nacional de la Plata. Complejo Astronómico "El Leoncito". Universidad Nacional de San Juan. Complejo Astronómico "El Leoncito"; ArgentinaFil: Angeloni, Rodolfo. Gemini Observatory; Chil
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