The expressive power of logic is believed to be able to model most of the fundamental aspects of information retrieval. However, it is also understood that classical logic is ineffective for handling partiality and uncertainty in IR. Applying non-classical logics such as the AGM belief revision logic and the possibilistic logic to adaptive information retrieval is appealing since they provide a powerful and rigorous framework to model partiality and uncertainty inherent in any IR processes. The maxi-adjustment method, which is an (...) effective computational apparatus of the AGM paradigm, is applied to develop the learning components of the adaptive information agents. Essentially, maxi-adjustment allows the partial representation K of a user's information needs N to be refined gradually based on the user's relevance feedback t. Generally speaking, learning in adaptive information agents is characterised by the AGM belief revision Kt*. On the other hand, possibilistic logic supports a gradated assessment of the uncertainty arising from matching K with the imperfect characterisation d of an information object D. Information matching in adaptive information agents is underpinned by K ƕ d, where ƕ is the possibilistic inference relation. This paper illustrates how maxi-adjustment and possibilistic deduction can be applied to develop the adaptive information agents. Their impact on the agents learning autonomy and explanatory power is also discussed. (shrink)

Description: Ancient Indian logic by itself is a very vast subject. The ancient Sanskrit term nyaya which was first used in a different or in a much more general sense, was later specifically applied to the Nyaya school. The physics and physiology and psychology of the Nyaya doctrine are not specifically its own, being from the first indistinguishable from those of its sister Sastra, the Vaisesika. What characterizes it specifically is the development of the nyaya or five-membered method of demonstration (...) and its insistence on the four sources of knowledge, corresponding to the first four members of its demonstrative formula, or 'Syllogism.' The importance of Nyaya is in its doctrine of the pramanas, or sources of proof, and in its formulation of the nyaya, or method of demonstration. Indian Logic in its Early Schools by H.N. Randle is an interpretation of Indian logical theory in its historical development based on the study of original texts wherever reference to Nyaya as a method of logic has been made, and thus, covers a very wide field of Indian philosophy. An indispensable work for students of Indian philosophy, it is especially important for those who are interested in Nyayadarsana in its relation to the early logic of other schools. (shrink)

The transhumanist literature encompasses diverse nonnovel positions on questions of disability and obligation reflecting long-running political philosophical debates on freedom and value choice, complicated by the difficulty of projecting values to enhanced beings. These older questions take on a more concrete form given transhumanist uses of biotechnologies. This paper will contrast the views of Hughes and Sandberg on the obligations persons with "disabilities" have to enhance and suggest a new model. The paper will finish by introducing a distinction between the (...) responsibility society has in respect of the presence of impairments and the responsibility society has not to abandon disadvantaged members, concluding that questions of freedom and responsibility have renewed political importance in the context of enhancement technologies. (shrink)

This unique volume will appeal to those interested in the philosophy of mind, cognitive science, and artificial intelligence as well as students of Castaneda and Latin American philosophy.

Health care policy in the Netherlands has long been guided by the values of solidarity and equality. As a result of several forces, particularly the scarcity of resources, the retreat of the Welfare State and the introduction of market forces in health care, both values are increasingly under strain. Next to solidarity and equality, freedom of choice and financial responsibility are playing an important role in Dutch health care. Consequently, there is a growing division in Dutch heaith care between two (...) tiers, one basic tier giving access to a basic package of services and a luxury tier giving access to a higher quality of care and to services not included in the basic package. The main thesis of the article is that a two-tier system is morally justified on the condition that the basic tier is universally accessible and is based on the value of humanitarian solidarity. Keywords: access to health care, health insurance, resource allocation, solidarity CiteULike Connotea Del.icio.us What's this? (shrink)