In this paper, we address the complexity issue of reasoning with implication constraints. We consider the IC-RFT problem, which is the problem of deciding whether a conjunctive yes/no query always produces the empty relation (\no" answer) on database instances satisfying a given set of implication constraints, as a central problem in this respect. We show that several other important problems, ...

Pain is a natural feeling, perception, emotion, and reflection of all human beings and often comes along with mental and health problems which is experienced physically (pain, disease, injury and consequently death) and mentally (sorrow, fear and despair). This study aims to investigate the role of positive affection on predicting the aspects of pain perception in patients with MS. Forty three...

â  â  love and affection from jibran's point of view â  â  â  sadegh fathi dehkordi * â  â  abstract â  from the view point of jibran khalil jibran, affection is the law of life and the base of all things in the world. affection is one of the manifestations of god and it is a light extracted from other lights. real affection is endless .the human being cannot learn affection because it is ...