Weighted nite-state constraints that can count unboundedly many violations make Optimality Theory more powerful than nite-state transduction (Frank and Satta, 1998). This result is empirically and computationally awkward. We propose replacing these unbounded constraints, as well as nonnite-state Generalized Alignment constraints, with a new class of nite-state directional constraints. We give l...

In this article, a novel adaptive trajectory tracking controller is designed for payload-carrying spacecraft under full state constraints. The proposed can tackle state-dependent uncertainties without priori knowledge of their structures and upper bounds. ensures time-varying constraints on all states time derivatives. closed-loop stability the scheme verified analytically via Lyapunov method, ...

The study analyzed factors that motivate agricultural extension agents in Agricultural Development Programme of Abia State. Primary data were collected from 96 extension agents in Abia State, Nigeria who were selected using multi-stage random sampling technique. Data were analyzed using descriptive statistics, mean score, ordered logit and Spearman rank correlation. It was revealed that 58.3% o...

Global health networks—webs of individuals and organizations linked by a shared concern for a particular condition—have proliferated over the past quarter century. In a recent editorial in this journal, I presented evidence that their effectiveness in addressing four challenges—problem definition, positioning, coalitionbuilding and governance—shapes their ability to influence policy. The editor...