274 research outputs found
To trust or not to trust: cognitive reflection in trust game
We present results from two studies that show a positive relation between cognitive reflection and trusting behavior, but no significant relation with trustworthy behavior. Our finding holds regardless of individual distributional social preferences and risk aversion. Our results add to a growing body of literature that illustrates the role of cognitive ability in helping explain outcomes in economic experiments
The nuclear and extended mid-infrared emission of Seyfert galaxies
We present subarcsecond resolution mid-infrared (MIR) images obtained with
8-10 m-class ground-based telescopes of a complete volume-limited (DL<40 Mpc)
sample of 24 Seyfert galaxies selected from the Swift/BAT nine month catalog.
We use those MIR images to study the nuclear and circumnuclear emission of the
galaxies. Using different methods to classify the MIR morphologies on scales of
~400 pc, we find that the majority of the galaxies (75-83%) are extended or
possibly extended and 17-25% are point-like. This extended emission is compact
and it has low surface brightness compared with the nuclear emission, and it
represents, on average, ~30% of the total MIR emission of the galaxies in the
sample. We find that the galaxies whose circumnuclear MIR emission is dominated
by star formation show more extended emission (650+-700 pc) than AGN-dominated
systems (300+-100 pc). In general, the galaxies with point-like MIR
morphologies are face-on or moderately inclined (b/a~0.4-1.0), and we do not
find significant differences between the morphologies of Sy1 and Sy2. We used
the nuclear and circumnuclear fluxes to investigate their correlation with
different AGN and SF activity indicators. We find that the nuclear MIR emission
(the inner ~70 pc) is strongly correlated with the X-ray emission (the harder
the X-rays the better the correlation) and with the [O IV] lambda 25.89 micron
emission line, indicating that it is AGN-dominated. We find the same results,
although with more scatter, for the circumnuclear emission, which indicates
that the AGN dominates the MIR emission in the inner ~400 pc of the galaxies,
with some contribution from star formation.Comment: 27 pages, 12 figures, accepted by MNRA
Estudio experimental de un colector con acumulación integrada de dos tanques con superficies reflectantes y cubierta de policarbonato
El objetivo de este trabajo es analizar experimentalmente el comportamiento de un colector con acumulación integrada de dos tanques horizontales, superficies reflectantes y cubierta de policarbonato, a fin de determinar la capacidad del mismo para proveer agua caliente. A un prototipo construido en la Universidad Nacional de Río Cuarto se le midieron temperaturas a la entrada, a la salida y en lugares intermedios, a la vez que se analizaron la radiación solar incidente y la temperatura ambiente durante varios días. Los resultados se presentan en diagramas que muestran la evolución de las temperaturas en función del tiempo y se realiza un cálculo estimativo de la cantidad de agua caliente que podría proveer el sistema. Se llega a la conclusión de que el sistema posee una buena capacidad de captación y almacenamiento de energía y que sería capaz de proveer una fracción solar aceptable en un servicio de tipo residencial.The goal of this work is to analyse by means of experiments the behaviour of an integral collector storage system composed by two horizontal tanks, reflective surfaces and a polycarbonate cover, in order to determine the ability of this system to provide hot water. Inlet, outlet, and intermediate temperatures were measured to a prototype built in the National University of Rio Cuarto, and in the same time the ambient temperature and global horizontal solar radiation were recorded, during a series of days. The results are presented in diagrams, which show the evolution of the temperatures and radiation as a function of time and an estimative calculation is performed in order to check the quantity of hot water the system can provide. The conclusion is that the system has a good absorption and storage energy capacity and it would be able to provide an acceptable solar fraction in a residential service.Asociación Argentina de Energías Renovables y Medio Ambiente (ASADES
Estudio experimental de un colector con acumulación integrada de dos tanques con superficies reflectantes y cubierta de policarbonato
El objetivo de este trabajo es analizar experimentalmente el comportamiento de un colector con acumulación integrada de dos tanques horizontales, superficies reflectantes y cubierta de policarbonato, a fin de determinar la capacidad del mismo para proveer agua caliente. A un prototipo construido en la Universidad Nacional de Río Cuarto se le midieron temperaturas a la entrada, a la salida y en lugares intermedios, a la vez que se analizaron la radiación solar incidente y la temperatura ambiente durante varios días. Los resultados se presentan en diagramas que muestran la evolución de las temperaturas en función del tiempo y se realiza un cálculo estimativo de la cantidad de agua caliente que podría proveer el sistema. Se llega a la conclusión de que el sistema posee una buena capacidad de captación y almacenamiento de energía y que sería capaz de proveer una fracción solar aceptable en un servicio de tipo residencial.The goal of this work is to analyse by means of experiments the behaviour of an integral collector storage system composed by two horizontal tanks, reflective surfaces and a polycarbonate cover, in order to determine the ability of this system to provide hot water. Inlet, outlet, and intermediate temperatures were measured to a prototype built in the National University of Rio Cuarto, and in the same time the ambient temperature and global horizontal solar radiation were recorded, during a series of days. The results are presented in diagrams, which show the evolution of the temperatures and radiation as a function of time and an estimative calculation is performed in order to check the quantity of hot water the system can provide. The conclusion is that the system has a good absorption and storage energy capacity and it would be able to provide an acceptable solar fraction in a residential service.Asociación Argentina de Energías Renovables y Medio Ambiente (ASADES
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A 15 µm selected sample of hHigh-z starbursts and AGNs
We report results from our Spitzer GO-1 program on IRS spectroscopy of a large sample of Luminous Infrared Galaxies and quasars selected from the European Large Area ISO Survey (ELAIS). The selected ELAIS sources have a wide multi-wavelength coverage, including ISOCAM, ISOPHOT, IRAC
and MIPS (from SWIRE), and optical photometry. Here we present the sample selection and results from the IRS spectroscopy
Morphological studies of the Spitzer Wide-Area Infrared Extragalactic survey galaxy population in the UGC 10214 Hubble space telescope/advanced camera for surveys field
We present the results of a morphological analysis of a small subset of the Spitzer Wide-Area Infrared Extragalactic survey (SWIRE) galaxy population. The analysis is based on public Advanced Camera for Surveys (ACS) data taken inside the SWIRE N1 field, which are the deepest optical high-resolution imaging available within the SWIRE fields as of today. Our reference sample includes 156 galaxies detected by both ACS and SWIRE. Among the various galaxy morphologies, we disentangle two main classes, spheroids (or bulge-dominated galaxies) and disc-dominated ones, for which we compute the number counts as a function of flux. We then limit our sample to objects with Infrared Array Camera (IRAC) fluxes brighter than 10 μJy, estimated ~90 per cent completeness limit of the SWIRE catalogues, and compare the observed counts to model predictions. We find that the observed counts of the spheroidal population agree with the expectations of a hierarchical model while a monolithic scenario predicts steeper counts. Both scenarios, however, underpredict the number of late-type galaxies. These observations show that the large majority (close to 80 per cent) of the 3.6- and 4.5-μm galaxy population, even at these moderately faint fluxes, is dominated by spiral and irregular galaxies or mergers
Evolution of an intra-plate rift basin: the Latest Jurassic-Early Cretaceous Cameros Basin (Northwest Iberian Ranges, North Spain)
Depto. de Geodinámica, Estratigrafía y PaleontologíaFac. de Ciencias GeológicasTRUEpu
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How do markets manage water resources? An experiment
We experimentally test how a private monopoly, a duopoly and a public utility allocate water of differing qualities to households and farmers. Most of our results are in line with the theoretical predictions. Overexploitation of the resources is observed independently of the market structure. Stock depletion for the public utility is the fastest, followed by the private duopoly and private monopoly. On the positive aspects of centralized public management, we find that the average quality to price ratio offered by the public monopoly is substantially higher than that offered by the private monopoly or duopoly
Field theories with anisotropic scaling in 2D, solitons and the microscopic entropy of asymptotically Lifshitz black holes
Field theories with anisotropic scaling in 1+1 dimensions are considered. It
is shown that the isomorphism between Lifshitz algebras with dynamical
exponents z and 1/z naturally leads to a duality between low and high
temperature regimes. Assuming the existence of gap in the spectrum, this
duality allows to obtain a precise formula for the asymptotic growth of the
number of states with a fixed energy which depends on z and the energy of the
ground state, and reduces to the Cardy formula for z=1. The holographic
realization of the duality can be naturally inferred from the fact that
Euclidean Lifshitz spaces in three dimensions with dynamical exponents and
characteristic lengths given by z, l, and 1/z, l/z, respectively, are
diffeomorphic. The semiclassical entropy of black holes with Lifshitz
asymptotics can then be recovered from the generalization of Cardy formula,
where the ground state corresponds to a soliton. An explicit example is
provided by the existence of a purely gravitational soliton solution for BHT
massive gravity, which precisely has the required energy that reproduces the
entropy of the analytic asymptotically Lifshitz black hole with z=3.
Remarkably, neither the asymptotic symmetries nor central charges were
explicitly used in order to obtain these results.Comment: 17 pages, no figures, references corrected and update
Vertical integration, market foreclosure and quality investment
We study incentives to vertically integrate in an industry with verti- cally differentiated downstream firms. Vertical integration by one of the firms increases production costs for the rival. Increased production costs negatively affects quality investment both by the integrated firm and the unintegrated rival. Quality investment by both firms decreases under any (vertical inte- gration) scenario. The decrease in quality invesment by both firms softens competition among downstream firms. By integrating first, a firm always produces the high quality good and earns higher profits. A fully integrated industry, with increased product differentiation, is observed in equilibrium. Due to increase in firm profits, social welfare under this structure is greater than under no integration.info:eu-repo/semantics/publishedVersio
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