Identification of Herbig Ae/Be Stars in the Small Magellanic Cloud

Protoplanetary disks orbiting intermediate-mass stars, Herbig Ae/Be stars, that have formed in a metal-poor environment may evolve differently than their Galactic cousins. A study of the planet-formation process in such an environment requires identification and characterization of a sample of candidates. We have observed several stars in the Small Magellanic Cloud, a nearby metal-poor dwarf galaxy, that have optical spectral properties of Herbig Ae/Be stars, including strong Hα emission, blue continuum excess, and spectral types ranging from early G to B. Infrared spectra of these sources from the Spitzer Space Telescope show strong excess emission indicating the presence of silicate dust, molecular and atomic gas, and polycyclic aromatic hydrocarbons. We present an analysis of the likelihood that these candidates are Herbig Ae/Be stars. This identification is the necessary first step to future investigations that will examine the role of metallicity in the evolution of protoplanetary disks

Power balances, transnational elites, and local economic governance: The political economy of development in Medellín

Applying a non-linear political economy analysis of power balances, institutional mechanisms, and elite structures, this study sheds light on the characteristics of Medellín’s economic development since the early 2000s. Elites with minimal technological capabilities and interests in promoting the advancement of transnational capitalism have successfully secured access to sources of power. These conditions (re)produce neoliberal logics of local governance that focus on economic growth in sectors with perceived global comparative advantages and on sustaining the particular power balances in Medellín’s political settlement. This has led to failures of generating positive forward and backward linkages for productivity growth of local firms, a local labour market marked by low wages and high employment elasticities, and large income inequalities. The local governance model that perpetuates productivity and inequality problems of the city is adopted as an opportunistic discourse of Medellín’s transnationalised capitalist elite in the larger neoliberal context of Colombia’s polity and economic policy agenda. In the absence of structural reforms targeting low wages and incentivising firms to develop technological capabilities, Medellín’s low productivity and high inequality problems are likely to persist

Effect of rosiglitazone on the frequency of diabetes in patients with impaired glucose tolerance or impaired fasting glucose: a randomised controlled trial

Background Rosiglitazone is a thiazolidinedione that reduces insulin resistance and might preserve insulin secretion. The aim of this study was to assess prospectively the drugs ability to prevent type 2 diabetes in individuals at high risk of developing the condition