Sizes of Confirmed Globular Clusters in NGC 5128: A Wide-Field High-Resolution Study

Using Magellan/IMACS images covering a 1.2 x 1.2 sq. degree FOV with seeing of 0.4"-0.6", we have applied convolution techniques to analyse the light distribution of 364 confirmed globular cluster in the field of NGC 5128 and to obtain their structural parameters. Combining these parameters with existing Washington photometry from Harris et al. (2004), we are able to examine the size difference between metal-poor (blue) and metal-rich (red) globular clusters. For the first time, this can be addressed on a sample of confirmed clusters that extends to galactocentric distances about 8 times the effective radius, R$_{eff}$, of the galaxy. Within 1 R$_{eff}$, red clusters are about 30% smaller on average than blue clusters, in agreement with the vast majority of extragalactic globular cluster systems studied. As the galactocentric distance increases, however, this difference becomes negligible. Thus, our results indicate that the difference in the clusters' effective radii, r$_e$, could be explained purely by projection effects, with red clusters being more centrally concentrated than blue ones and an intrinsic r$_e$--R$_{gc}$ dependence, like the one observed for the Galaxy.Comment: 4 figures, accepted for publication in ApJ

Age Structure, Income Distribution And Economic Growth

economic policy; fiscal policy

Probabilistic Combination of Noisy Points and Planes for RGB-D Odometry

This work proposes a visual odometry method that combines points and plane primitives, extracted from a noisy depth camera. Depth measurement uncertainty is modelled and propagated through the extraction of geometric primitives to the frame-to-frame motion estimation, where pose is optimized by weighting the residuals of 3D point and planes matches, according to their uncertainties. Results on an RGB-D dataset show that the combination of points and planes, through the proposed method, is able to perform well in poorly textured environments, where point-based odometry is bound to fail.Comment: Accepted to TAROS 201

Four keys to Chilean culture : authoritarianism, legalism, fatalism and compadrazgo

Chilean culture is said to be part of a wider Hispanic American culture that shares many traits (see Godoy et al. 1986; Subercaseaux 1999; Valdivieso and which could be identified as an identity with a Latin American sense (see Rodríguez et al. 2001). In this sense, though it may seem as if any attempt to describe or analyse particular operating elements, processes, systems and structures were a useless task, the nature of identity makes it a multiple and symbolically contradictory phenomenon, with relevant contextual 'consequences' and particularities that help identify a collective imaginary that can be associated with what means to be Chilean. As such, the importance of meaning lies not on its production but rather on its reception; therefore, we aim to address some elements of the reception that we have identified as 'critical' or 'diagnostic'. By 'critical', we mean those elements, which absence would substantively modify what is collectively associated with Chilean culture and by 'diagnostic', we suggest the possibility they offer of exploring meaningful contextual traits. In order to contextualise our analysis, we will focus on three discursive levels, namely organisational/structural, cultural/ideological and identity. At the organisational/structural level, we will make reference to structure and aesthetics in the broader sense of social context as well as in public and private organisations; at cultural/ideological level, we will make reference to practices, rituals, values and behaviours; and at the identity level we will make reference to strategies individuals use to manage their social identities

HRM in Chile : the impact of organisational culture

Purpose: This paper provides insight on the influence of organisational culture on HRM practices in Chile by exploring shared meanings (basic assumptions and beliefs) and organisational models that can be identified from activities, dynamics, social relationships and behaviours. Design/methodology/approach: The paper is based on research conducted in Chile where a combination of self-completion questionnaires, semi-structured interviews and non-participant observation was carried out in a non-probabilistic sample of 46 organisations. Findings: Findings suggest that there is a shared definition of work characterised by five elements; namely, the existence of great work pressure exerted by managers; a sustained focus of upper levels on organisational efficiency as an isolated element that does not include HRM; the inexistence of worker autonomy and empowerment; the use of administrative jargon and understandings of loyalty, dedication, compliance and professionalism as desired qualities in workers. The paper argues that there are three distinct categories of cultural discourse in Chilean organisations: pessimistic/fatalistic, optimistic/maniac and pragmatic/bureaucratic. Research limitations/implications: Due to the type of sampling used, findings cannot be taken to represent the whole of Chilean organisations.Practical implications: Data presented in this paper helps to understand many of the behaviours observed in Chilean organisations, which provides HR policy-makers and practitioners with sounder foundations for designing organisational programs, policies and action plans. Originality/value: The paper presents new evidence to increase empirical body of work addressing the relationship between organisational culture and HRM in developing countries, particularly in Latin America

EFFECTS OF FOOD AND HEALTH SPENDING PATTERNS ON THE HEALTH OF THE ELDERLY

Examines linkages between food and health spending patterns, income, and health status of the elderly. Links these relationships to food insecurity and expenditures on nutraceuticals. Methodology includes simultaneous estimation of expenditure systems and health production functions. Preliminary results indicate simultaneity between health production function and spending patterns throughout the life cycle.Food Consumption/Nutrition/Food Safety, Health Economics and Policy,

Soft masses in superstring models with anomalous U(1) symmetries

We analyze the general structure of soft scalar masses emerging in superstring models involving anomalous U(1) symmetries, with the aim of characterizing more systematically the circumstances under which they can happen to be flavor universal. We consider both heterotic orbifold and intersecting brane models, possibly with several anomalous and non-anomalous spontaneously broken U(1) symmetries. The hidden sector is assumed to consist of the universal dilaton, Kahler class and complex structure moduli, which are supposed to break supersymmetry, and a minimal set of Higgs fields which compensate the Fayet-Iliopoulos terms. We leave the superpotential that is supposed to stabilize the hidden sector fields unspecified, but we carefully take into account the relations implied by gauge invariance and the constraints required for the existence of a metastable vacuum with vanishing cosmological constant. The results are parametrized in terms of a constrained Goldstino direction, suitably defined effective modular weights, and the U(1) charges and shifts. We show that the effect induced by vector multiplets strongly depends on the functional form of the Kahler potential for the Higgs fields. We find in particular that whenever these are charged matter fields, like in heterotic models, the effect is non-trivial, whereas when they are shifting moduli fields, like in certain intersecting brane models, the effect may vanish.Comment: 35 pages, LaTe

Controlling Urban Air Pollution Caused by Households: Uncertainty, Prices, and Income

We examine the control of air pollution caused by households burning wood for heating and cooking in the developing world. Since the problem is one of controlling emissions from nonpoint sources, regulations are likely to be directed at household choices of wood consumption and combustion technologies. Moreover, these choices are subtractions from, or contributions to, the pure public good of air quality. Consequently, the efficient policy design is not independent of the distribution of household income. Since it is unrealistic to assume that environmental authorities can make lump sum income transfers part of control policies, efficient control of air pollution caused by wood consumption entails a higher tax on wood consumption and a higher subsidy for more efficient combustion technologies for higher income households. Among other difficulties, implementing a policy to promote the adoption of cleaner combustion technologies must overcome the seemingly paradoxical result that efficient control calls for higher technology subsidies for higher income households.efficiency, urban air pollution, nonpoint pollution, environmental policy, uncertainty