variability interval

См. также в других словарях:

• variability — 1. The capability of being variable. 2. In genetics, the potential or actual differences, either quantitative or qualitative, in phenotype among individuals. baseline v. of fetal heart rate the beat to beat changes in fetal heart rate as recorded …   Medical dictionary

• QT interval — Schematic representation of normal ECG trace (sinus rhythm), with waves, segments, and intervals labeled. In cardiology, the QT interval is a measure of the time between the start of the Q wave and the end of the T wave in the heart s electrical… …   Wikipedia

• Heart rate variability — (HRV) is a measure of the beat to beat variations in heart rate. It is usually calculated by analyzing a time series of beat to beat intervals from the ECG or of beat to beat intervals derived from an arterial pressure tracing.Various measures of …   Wikipedia

• Reference range — Reference ranges edit in: blood urine CSF feces In health related fields, a reference range or reference interval usually describes the variations of a measurement or value in healthy i …   Wikipedia

• Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry       The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …   Universalium

• statistics — /steuh tis tiks/, n. 1. (used with a sing. v.) the science that deals with the collection, classification, analysis, and interpretation of numerical facts or data, and that, by use of mathematical theories of probability, imposes order and… …   Universalium

• climate — /kluy mit/, n. 1. the composite or generally prevailing weather conditions of a region, as temperature, air pressure, humidity, precipitation, sunshine, cloudiness, and winds, throughout the year, averaged over a series of years. 2. a region or… …   Universalium

• climate change — Introduction  periodic modification of Earth s climate brought about as a result of changes in the atmosphere as well as interactions between the atmosphere and various other geologic, chemical, biological, and geographic factors within the Earth …   Universalium

• Water distribution on Earth — Contents 1 Distribution of river water 2 Variability of water availability 3 See also …   Wikipedia

• global warming — an increase in the earth s average atmospheric temperature that causes corresponding changes in climate and that may result from the greenhouse effect. [1975 80] * * * Potential increase in global average surface temperatures resulting from… …   Universalium

• probability theory — Math., Statistics. the theory of analyzing and making statements concerning the probability of the occurrence of uncertain events. Cf. probability (def. 4). [1830 40] * * * Branch of mathematics that deals with analysis of random events.… …   Universalium