Robots are typically expected to perform multiple tasks. For realizing tasks using multi-degrees-of-freedom of a robot, priority control was developed. The prioritizes conflicting by projecting lower-priority task velocity into null space higher-priority spaces. Similarly, for two on single-degree-of-freedom periodic/aperiodic separation separates state quasi-periodic and quasi-aperiodic states...

To resolve conflicts among norms, various nonmonotonic formalisms can be used to perform prioritized normative reasoning. Meanwhile, formal argumentation provides a way to represent nonmonotonic logics. In this paper, we propose a representation of prioritized normative reasoning by argumentation. Using hierarchical abstract normative systems, we define three kinds of prioritized normative reas...

In its traditional definition, a repair of an inconsistent databaseis a consistent database that differs from the inconsistent onein a “minimal way.” Often, repairs are not equally legiti-mate, as it is desired to prefer one over another; for example,one fact is regarded more reliable than another, or a morerecent fact should be preferred to an earlier one. Motivatedby t...

In default reasoning, usually not all possible ways of resolving conflicts between default rules are acceptable. Criteria expressing acceptable ways of resolving the conflicts may be hardwired in the inference mechanism, for example specificity in inheritance reasoning can be handled this way, or they may be given abstractly as an ordering on the default rules. In this article we investigate fo...