منابع مشابه
Stars ’ - Have They Been Discovered ?
Recently there is a suggestion about the star RXJ1856.5−3754, being a possible candidate for quark star. While from the estimates of the radiation radius, given by the authors, it does not seem to fit with any of the known models for such stars, the mass radius diagram admits the possibility of this being a quark star of mass M ⊙ < M < 1.4M ⊙ , provided the radius mentioned is the actual radius...
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Recently there have been controversial claims about the nature of the isolated compact star RXJ1856.5−3754, with one group claiming it to be a strange star (Drake et al., 2002) while the other asserting it to be a normal neutron star (Walter & Lattimer, 2002). The controversy arises mainly due to the distance estimate, which in turn is used to resolve the measured angular diameter, and thus the...
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We address the issue of agents reasoning about other agents’ nonmonotonic reasoning ability in the framework of a multi-agent autoepistemic logic (AEL). I n single-agent AEL, nonmonotonic inferences are drawn based on all the agent knows. In a multi-agent context such as Jill reasoning about Jack’s nonmonotonic inferences, this assumption must be abandoned since it cannot be assumed that Jill k...
متن کاملAll they know in turn
This paper studies the reasoning of non-knowledge for multiple agents. In a multi-agent environment, agents may derive knowledge from the observation that other agents do not know a fact. That means normally there does not exist a vector of maximum relations that reflect the minimum knowledge (i.e. only knowing) of all agents. In this paper, we introduce a causal relation to characterize the ap...
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Although the availability of generic oncology drugs allows access to contemporary care and reduces costs, there is international variability in the safety of this class of drugs. In this Series paper, we review clinical, policy, safety, and regulatory considerations for generic oncology drugs focusing on the USA, Canada, the European Union (EU), Japan, China, and India. Safety information about...
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ژورنال
عنوان ژورنال: Hispanic American Historical Review
سال: 1965
ISSN: 0018-2168,1527-1900
DOI: 10.1215/00182168-45.2.335