A broad view of cognitive linguistics

Cognitive linguistics can offer an account not only of linguistic structure but also of a wide variety of social and cultural phenomena. The comprehensive account presented in this paper is crucially based and dependent on cognitive capacities that human understanders and producers of language possess quite independently of their ability to use language. By discussing the cognitive processes and the various linguistic, social and cultural issues they help us describe and explain, the author demonstrates that cognitive linguistics is far more than a theory of language; one can think of it as a theory of "meaning-making" in general in its innumerable linguistic, social and cultural facets

Haptic Rendering and Human Stabilization in Presence of Structural Flexibility

Unstable behaviour is a significant problem in many haptic applications. The sampled-data nature and time delays induce complex dynamic behaviours in such systems. Structural flexibility may further reduce the stable domain of operation. This is illustrated via the systematic modeling and analysis of an impedance type haptic device with typical design elements such as closed-loop mechanisms and cable/capstan drives. The role of the operator in the dynamics of these systems is also demonstrated. The present work provide stability analysis, experimental validation and derive conditions for the range of parameters in which the operator can significantly contribute to the stabilization of the system

Stiffness modeling of robotic manipulator with gravity compensator

The paper focuses on the stiffness modeling of robotic manipulators with gravity compensators. The main attention is paid to the development of the stiffness model of a spring-based compensator located between sequential links of a serial structure. The derived model allows us to describe the compensator as an equivalent non-linear virtual spring integrated in the corresponding actuated joint. The obtained results have been efficiently applied to the stiffness modeling of a heavy industrial robot of the Kuka family

The discretized coulomb friction model in a non-singular complementarity formulation for multibody systems with contacts

Postprint (published version

Cross-cultural variation in deliberate metaphor interpretation

The distinction between ‘deliberate’ and ‘non deliberate’ metaphors has been developed within a five-step framework (Steen) of metaphor production. Deliberate metaphors invite the addressee to pay special attention to their cross-domain structure mapping rather than focusing primarily on the topical proposition. This paper presents results of a pilot survey eliciting interpretations for the metaphors A NATION IS A BODY/A NATION IS A PERSON from an international sample of respondents in 10 different countries. ESL/EFL users from diverse cultural and/or linguistic backgrounds were asked to apply the metaphorical idiom body politic to their home nations. The responses show systematic variation in preferred metaphor interpretations, some of which can be linked to dominant cultural traditions, as well as evidence of polemical and/or ironic elaboration. Neither of these findings is predicted by classic conceptualist models that describe metaphor understanding as an automatic and unconscious process. Instead, when paying special attention to metaphoricity, informants seem to have chosen between diverse interpretation versions and in some cases to have elaborated them further to achieve social pragmatic effects. These findings provide new supporting evidence for Deliberate Metaphor Theory by highlighting deliberateness in metaphor interpretation and outlining perspectives for further empirical testing of metaphor understanding in specific registers and usage contexts (e.g., political discourse, EFL/ESL acquisition)

Use of performance indicators in the analysis of running gait impacts

Foot-ground impact is a critical event during the running cycle. In this work, three performance indicators were used to characterize foot-ground impact intensity: the effective pre-impact kinetic energy, representative elements of the effective mass matrix, and the critical coefficient of friction. These performance indicators can be obtained from the inertial properties of the biomechanical system and its pre-impact mechanical state, avoiding the need to carry out force measurements. Ground reaction forces and kinematic data were collected from the running motion of an adult that adopted both rear-foot and fore-foot strike patterns. Different running cycles were analysed and statistical tests performed. Results showed that the three proposed indicators are able to illustrate significant differences between fore-foot and rear-foot strike impacts. They also support the hypothesis that fore-foot strike reduces impact intensity. On the other hand, a higher likelihood of slipping during the contact onset is associated with fore-foot strike pattern.Postprint (author's final draft

Compliance error compensation in robotic-based milling

The paper deals with the problem of compliance errors compensation in robotic-based milling. Contrary to previous works that assume that the forces/torques generated by the manufacturing process are constant, the interaction between the milling tool and the workpiece is modeled in details. It takes into account the tool geometry, the number of teeth, the feed rate, the spindle rotation speed and the properties of the material to be processed. Due to high level of the disturbing forces/torques, the developed compensation technique is based on the non-linear stiffness model that allows us to modify the target trajectory taking into account nonlinearities and to avoid the chattering effect. Illustrative example is presented that deals with robotic-based milling of aluminum alloy