The main theme of this essay is human action, from the viewpoint of building machines that can both understand human actions and have the ability of performing similar actions. The “Human activity language” (HAL) [Guerra-Filho, Fermuller and Aloimonos 2005] serves the role of a concrete proposal anchoring this discussion. The wider framework of the problem is initially explored. Different pathw...

Quality and shelf-life of whole and filleted Coryphaena hippurus, stored with modified atmosphere packaging (MAP) and natural antioxidants from halophytes (HAL), were investigated. Fillets were divided into control, simply sealed in trays; MAP, preserved by modified atmosphere (45% CO2, 50% N2, 5% O2); and MAP-HAL, pretreated with antioxidants and preserved by MAP. Whole and filleted fish were ...

Correlations between substantia nigra (SN) dopamine (DA) cell activity and striatal extracellular DA were examined using simultaneous extracellular single-unit recordings and in vivo microdialysis performed in drug-naive rats and in rats treated repeatedly with haloperidol (HAL). Intact rats treated with HAL for 21-28 d exhibited significantly fewer active DA cells, indicating the presence of d...

Although haloperidol (HAL)has been available as an antipsychotic for over 30 years, controversy still surrounds the appropriate dose in the treatment of psychosis and in particular, schizo phrenia. In practice, high dose HAL (greater than 20 mg/day) continues to be prescribed, despite good reason for not doing so: the incidence of extrapyramidal side-effects (EPSE) is known to be dose-related; ...

Hal incorporates a number of high-level language constructs such as the incremental specialization of synchronization constraints to maintain the consistency of actors at run-time, the inheritance of both code and synchronization constraints, and limited reeective capabilities to customize the system with respect to fault tolerance. This paper describes some issues in compiling Hal, and, in par...

We investigate the dynamics of the heterodimer autorepression loop (HAL), a small genetic module in which a protein A acts as an autorepressor and binds to a second protein B to form an AB dimer. For suitable values of the rate constants, the HAL produces pulses of A alternating with pulses of B. By means of analytical and numerical calculations, we show that the duration of A pulses is extreme...

Hal incorporates a number of high level language constructs such as the incremental special ization of synchronization constraints to maintain the consistency of actors at run time the inheritance of both code and synchronization constraints and limited re ective capabilities to customize the system with respect to fault tolerance This paper describes some issues in com piling Hal and in partic...