Admissible orderings on the set of terms arise in the theory of Gröbner bases of ideals in multivariate polynomial rings. These orderings have already been classified by a constructive proof of the embedding theorem for ordered groups. We approach the subject from a different viewpoint by exploiting some fundamental results from the theory of latticeordered groups. This framework allows us to p...

Most existing text classification methods (and text mining methods at large) are based on representing the documents using the traditional vector space model. We argue that important information, such as the relationship among words, is lost. We propose a term graph model to represent not only the content of a document but also the relationship among the keywords. We demonstrate that the new mo...

Longo, Lawrence D., and William J. Pearce. Fetal cerebrovascular acclimatization responses to high-altitude, long-term hypoxia: a model for prenatal programming of adult disease? Am J Physiol Regul Integr Comp Physiol 288: R16–R24, 2005; doi:10.1152/ajpregu.00462.2004.—During the past several decades, many risk factors for cerebrovascular and cardiovascular disease have been identified. More re...

BACKGROUND Falls are the number one cause of injuries in older adults, and are particularly common in long-term care (LTC). Lack of objective evidence on the mechanisms of falls in this setting is a major barrier to prevention. Video capture of real-life falls can help to address this barrier, if valid tools are available for data analysis. To address this need, we developed a 24-item fall vide...

BACKGROUND Multimorbidity is not uncommon and the associated impact it places on healthcare utilisation and societal costs is of increased concern. The aim of the current study was to estimate the economic burden of multimorbidity among older adults in Singapore by investigating its association with the healthcare and societal resource use and cost. METHODS The Well-being of the Singapore Eld...

With the increase of information, document classification as one of the methods of text mining, plays vital role in many management and organizing information. Document classification is the process of assigning a document to one or more predefined category labels. Document classification includes different parts such as text processing, term selection, term weighting and final classification. ...

Background: Due to the importance of medical studies, researchers of this field should be familiar with various types of statistical analyses to select the most appropriate method based on the characteristics of their data sets. Classification and regression trees (CARTs) can be as complementary to regression models. We compared the performance of a logistic regression model and a CART in predi...

Legg-Calvé-Perthes disease (LCPD) is an idiopathic osteonecrosis of the femoral head with variable complications and resultant deformity of the femoral head and osteoarthritis. Suggested risk factors are acetabular retroversion, obesity, latitude, hyperactivity, and coagulopathy. The most commonly applied classification is based on radiolucency in the lateral pillar of the femoral head, which i...

It is known that, within the service time distribution class DHR, the FB discipline minimizes the mean delay in the M/G/1 queue among all work-conserving and non-anticipating service disciplines. It is also believed that a similar result is valid within a more general distribution class IMRL. However, we point out a flaw in the existing proof of this latter result that cannot be overcome. Moreo...