Ricardo Araújo

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It is derived a balance-of-payments equilibrium growth rate analogous to Thirlwall ́s Law from a Pasinettian multi-sector macrodynamic framework. The resulting formula, which we call Multi-Sectoral Thirlwall ́s Law, asserts that the growth rate of per capita income is directly proportional to the growth rate of exports, such a proportionality being(More)
Dicynodontia represent the most diverse tetrapod group during the Late Permian. They survived the Permo-Triassic extinction and are central to understanding Permo-Triassic terrestrial ecosystems. Although extensively studied, several aspects of dicynodont paleobiology such as, neuroanatomy, inner ear morphology and internal cranial anatomy remain obscure.(More)
With this inquiry, we seek to develop a disaggregated version of the post-Keynesian approach to economic growth, by showing that indeed it can be treated as a particular case of the Pasinettian model of structural change and economic expansion. By relying upon vertical integration it becomes possible to carry out the analysis initiated by Kaldor (1956) and(More)
The Structural Economic Dynamic approach is distinguished by its simultaneous approach to demand and supply sides of economic growth. However, the idea that growth itself can transform an economy, which became known in the literature as cumulative causation, cannot be properly studied by this framework because technological progress is treated in the same(More)
Force/Torque sensing is very important for several automatic and industrial robotic applications. Basically, if precise control of the forces that arise from contact between tools and parts is required to successfully complete the automatic task, then a force/torque sensor is needed along with some force/torque control technique. In this paper we focus on(More)
Programming‐by‐demonstration (PbD) is the possibility to program a robot just by showing what it is supposed to do and how it should do it. This paper reports a collection of developments that enable users to program industrial robots using speech, several device interfaces, force control and code generation techniques. The reported system is(More)
Purpose – The purpose of this paper is to present a CAD-based human-robot interface that allows non-expert users to teach a robot in a manner similar to that used by humans to teach each other. Another important issue addressed here has to do with how robots deal with uncertainty. Design/methodology/approach – Intuitive robot programming is achieved by(More)
Purpose – Interaction with robot systems for the specification of manufacturing tasks needs to be simple since the paper targets the widespread use of robots in small and medium enterprises (SMEs). In the best case, existing practices from manual work could be used, to ensure current employees a smooth introduction to robot technology as a natural part of(More)
The non-avian saurischians that have associated eggshells and embryos are represented only by the sauropodomorph Massospondylus and Coelurosauria (derived theropods), thus missing the basal theropod representatives. We report a dinosaur clutch containing several crushed eggs and embryonic material ascribed to the megalosaurid theropod Torvosaurus. It(More)
The quadrate of reptiles and most other tetrapods plays an important morphofunctional role by allowing the articulation of the mandible with the cranium. In Theropoda, the morphology of the quadrate is particularly complex and varies importantly among different clades of non-avian theropods, therefore conferring a strong taxonomic potential. Inconsistencies(More)