Policy evaluation is a process to determine whether a request submitted by a user satisfies the access control policies defined by an organization. Modality conflict is one of the main issues in policy evaluation. Existing modality conflict detection approaches do not consider complex condition attributes such as spatial and temporal constraints. An effective authorization propagation rule is n...

This paper considers the problem of modality conflicts in security policies for Service-Oriented Architecture (SOA) environments. We describe the importance of this problem and present an algorithm for discovering modality conflicts with low overhead. Often being of large scale and compound structure, SOA systems can definitely benefit from that efficiency boost. Another advantage of the propos...

In this paper, the automatic detection of conflict in audiovisual recordings of political debates is addressed. In contrast to the current state of the art in social signal processing, where only the audio modality is employed for analysing the human non-verbal behavior, we propose to use additionally visual features capturing certain facial behavioral cues such as head nodding, fidgeting and f...

The electrophysiological correlates of conflict processing and cognitive control have been well characterized for the visual modality in paradigms such as the Stroop task. Much less is known about corresponding processes in the auditory modality. Here, electroencephalographic recordings of brain activity were measured during an auditory Stroop task, using three different forms of behavioral res...

Safety policy sets out the rules that govern safe system interaction within a system of systems (SoS). These rules are derived from high-level policy goals informed by a hazard analysis. They are expressed in terms of behaviour that the system is allowed to exhibit and that which it is required to exhibit. Nevertheless, this process can lead to describing rules that conflict with one another, b...

This paper presents an adaptive fuzzy evidential reasoning approach, for segmenting multi-modality MR brain images. A novel fuzzy evidence structure model is proposed under the assumption that each information source provides two types of evidence: probabilistic evidence and fuzzy evidence. A new information measure, called hybrid entropy, is employed for evaluating the overall uncertainty cont...

Neuroimaging work on multisensory conflict suggests that the relevant modality receives enhanced processing in the face of incongruency. However, the degree of stimulus processing in the irrelevant modality and the temporal cascade of the attentional modulations in either the relevant or irrelevant modalities are unknown. Here, we employed an audiovisual conflict paradigm with a sensory probe i...

Affective conflict and control may have important parallels to cognitive conflict and control, but these processes have been difficult to quantitatively study with emotionally naturalistic laboratory paradigms. The current study examines a modification of the AX-Continuous Performance Task (AX-CPT), a well-validated probe of cognitive conflict and control, for the study of emotional conflict. I...

BACKGROUND Neural systems underlying conflict processing have been well studied in the cognitive realm, but the extent to which these overlap with those underlying emotional conflict processing remains unclear. A novel adaptation of the AX Continuous Performance Task (AX-CPT), a stimulus-response incompatibility paradigm, was examined that permits close comparison of emotional and cognitive con...