COMMUNICATIONSTO THE EDITOR 551 arteriovenous oxygen content difference (C[a-v]02) equals 3; and the fractional concentration of oxygen in the inspired gas (F1o2) equals 0.40. From the oxyhemoglobin dissociation curve, the arterial oxygen saturation equals 0.90. Since C(a-v)O, equals 3, the venous oxygen saturation (Sv02) equals 0.75 approximately. Using these figures, the QS/QT equals 0.502. T...

Given a point query Q in multi-dimensional space, K-Nearest Neighbor (KNN) queries return the K closest answers in the database with respect to Q. In this scenario, it is possible that a majority of the answers may be very similar to one or more of the other answers, especially when the data has clusters. For a variety of applications, such homogeneous result sets may not add value to the user....

Multi objective clustering is one focused area of multi objective optimization. Multi objective optimization attracted many researchers in several areas over a decade. Utilizing multi objective clustering mainly considers multiple objectives simultaneously and results with several natural clustering solutions. Obtained result set suggests different point of views for solving the clustering prob...

Knowledge about the distribution of data provides the basis for various tasks in the context of Linked Open Data, e.g. for estimating the result set size of a query, for the purpose of statistical schema induction or for using information theoretic metrics to detect patterns. In this paper I investigate the potential of obtaining estimates for such distributions from samples of Linked Data. The...

AbstrAct: Keyphrases precisely express the primary topics and themes of documents and are valuable for cataloging and classification. Manually assigning keyphrases to existing documents is a tedious task; therefore, automatic keyphrase generation has been extensively used to classify digital documents. Existing automatic keyphrase generation algorithms are limited in assigning semantically rele...

Traditional spatial querying assumes that a user specifies exactly the constraints of valid results, and that the result set contains only those items that fulfill exactly the query constraints. The nature of spatial data, however, makes it difficult for a user to always guess correctly the values stored, while exhaustive enumerations of acceptable alternatives to the ideal target would become ...

An increasing amount of information is being collected in structured, evolving, curated databases, driving the question of how information extracted from such datasets via queries should be cited. Unlike traditional research products, such books and journals, which have a fixed granularity, data citation is a challenge because the granularity varies. Different portions of the database, with var...

Weaning from mechanical ventilation remains a major challenge for critical care physicians. Because subjective criteria are inaccurate, objective measurements consisting of clinical criteria and physiologic tests (weaning predictors) have been used to facilitate decision-making. An integrated weaning index calculated as the product of static compliance and arterial oxygen saturation divided by ...