A Lexicon of Cave and Karst Terminology with Special Reference to Environmental Karst Hydrology. Courtesy of the author & The Karst Waters Institute. 2002.
Flow measurement — is the quantification of bulk fluid movement. Flow can be measured in a variety of ways. Positive displacement flow meters acumulate a fixed volume of fluid and then count the number of times the volume is filled to measure flow. Other flow… … Wikipedia
Tracer-gas leak testing method — As part of the recommended leak testing methods for nondestructive testing several tracer gas leak testing ones exist among which the methods of choice are: * Helium mass spectrometer or helium leak detection, providing the highest sensitivity *… … Wikipedia
Flow visualization — In fluid dynamics it is critically important to see the patterns produced by flowing fluids, in order to understand them. We can appreciate this on several levels: Most fluids (air, water, etc.) are transparent, thus their flow patterns are… … Wikipedia
Molecular tagging velocimetry — (MTV) is a specific form of flow velocimetry, a technique for determining the velocity of currents in fluids such as air and water. In its simplest form, a single write laser beam is shot once through the sample space. Along its path an optically … Wikipedia
Natural ventilation — The ventilation system of a regular earthship. Natural ventilation is the process of supplying and removing air through an indoor space without using mechanical systems. It refers to the flow of external air to an indoor space as a result of wind … Wikipedia
Helium mass spectrometer — A helium mass spectrometer is an instrument commonly used to detect and locate small leaks. It was initially developed in the Manhattan Project during World War II to find extremely small leaks in the gas diffusion process of uranium enrichment… … 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
hydrologic sciences — Introduction the fields of study concerned with the waters of the Earth. Included are the sciences of hydrology, oceanography, limnology, and glaciology. In its widest sense hydrology encompasses the study of the occurrence, the… … Universalium
Blut-Gehirn-Schranke — Die Blut Hirn Schranke, auch Blut Gehirn Schranke genannt, ist eine bei allen Landwirbeltieren (Tetrapoda) im Gehirn vorhandene physiologische Barriere zwischen dem Blutkreislauf und dem Zentralnervensystem. Sie dient dazu, die Milieubedingungen… … Deutsch Wikipedia
Blut-Hirn-Schranke — Die Blut Hirn Schranke, auch Blut Gehirn Schranke genannt, ist eine bei allen Landwirbeltieren (Tetrapoda) im Gehirn vorhandene physiologische Barriere zwischen dem Blutkreislauf und dem Zentralnervensystem (ZNS). Sie dient dazu, die… … Deutsch Wikipedia
