The paper proposes a paradigmatic approach to morphological knowledge acquisition. It addresses the problem of learning from examples rules for word-forms analysis and synthesis. These rules, established by generalizing the training data sets, are effectively used by a built-in interpreter which acts consequent ly as a morphological processor within the architecture of a natural language questi...

In lepton-number-violating supersymmetric models, there is no natural choice of basis to distinguish the down-type Higgs and lepton superfields. We employ basis-independent techniques to identify the massless majoron and associated light scalar in the case of spontaneously-broken lepton number (L). When explicit L-violation is added, these two scalars can acquire masses of order the electroweak...

In February 2005, the Annals of Internal Medicine, a highly respected journal, published a systematic review of 59 manuscripts covering a total of 62 samples that reported on the relationship between medical knowledge/healthcare quality and years in practice/physician age. The implication of the data presented is that throughout their careers, physicians fail to upgrade their knowledge to keep ...

A traffic simulation and assignment model is used to compute the social costs of congestion in five English towns, together with potential road charges. The social costs of congestion are measured by the deadweight loss and computed as the area between the marginal social cost and inverse demand curves between the actual and efficient levels of traffic. Potential road charges are computed as th...

OBJECTIVE To analyze how scrotal neoplasias have been managed during the past decade and to question possible factors or professions associated to its presence. MATERIALS AND METHODS We retrospectively evaluated every case reported from 1995 to 2005 at our hospital. We described the clinical scenario, complementary exams, treatments and outcomes. We also tried to verify if there was any risk,...

Would global patent protection be too weak without international coordination? Would it be too strong with the international coordination mandated by the TRIPS agreement (Agreement on Trade-Related Aspects of Intellectual Property Rights)? I try to answer these questions using a model of patent-setting game between governments. I introduce firm-biased government preferences and trade barriers, ...

Scientists routinely solve the problem of supplementing one’s store of variables with new theoretical posits that can explain the previously inexplicable. The banality of success at this task obscures a remarkable fact. Generating hypotheses that contain novel variables and accurately project over a limited amount of additional data is so difficult—the space of possibilities so vast—that succee...