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Topic: Radon measure

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Johann Radon

Mathematics

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	PlanetMath: Radon measure (Site not responding. Last check: 2007-10-10)
		A Radon space is a topological space on which every finite Borel measure is a Radon measure, this is the case, e.g.
		Radon measures are the “most important class of measures on arbitrary Hausdorff topological spaces” (König [1], p.xiv) and formed the base of the development of integration theory by Bourbaki and Schwartz.
		Radon measures are not necessarily locally finite, although this is the case for locally compact and metric spaces.
	planetmath.org /encyclopedia/RadonMeasure.html (237 words)

	Information on Radon (Site not responding. Last check: 2007-10-10)
		Radon is a naturally occurring, gaseous element that is a by-product of the radioactive decay of another element, uranium.
		Radon, for example, emits an alpha particle and gamma rays when it decays, and in the process is transformed into a new element called "polonium." Polonium then decays, in succession, into lead, bismuth, another form of polonium (that is, a different isotope), and finally into a stable (non-radioactive) form of lead.
		Radon decay by-products are more dangerous than radon itself is. There is no exact equivalence between the two concentration measures but for the typical house, 4 pCi/l of radon corresponds to about 0.02 WL of decay by-product atoms.
	radon.utoledo.edu /rad_info.html (1292 words)

	Radon
		Measurement of radon in homes is simple and relatively inexpensive and may be accomplished by various means.
		New concern regarding radon exposures is traceable to the discovery that there are more houses with high radon levels than previously realized and to the use of a new method of expressing and summing doses from partial body exposures, such as the lung dose from radon daughters (7-16).
		Radon concentrations indoors will generally be highest in the basement or on the ground level since the major source is influx from the soil under and around the house.
	www.physics.isu.edu /radinf/radon.htm (5754 words)

	Radon FAQ
		Radon is a radioactive gas that comes from the decay of radium in the soil.
		Radon is constantly being generated by the radium in rocks, soil, water and materials derived from rocks and soils.
		The radon generated in rocks or water usually stays trapped in that material unless the rocks are highly fractured or the water is mixed with the air.
	www.csbsju.edu /MNradon/faq.html (1703 words)

	Indoor Radon and Radon Decay Product Measurement Device Protocols \| Publications \| Radon \| Indoor Air \| Air \| US EPA
		The 1986 and 1989 versions of the measurement protocols recommended that known exposure measurements, or spikes, be conducted at a rate of a few percent of the total number of measurements.
		It is important to understand that this minimum measurement period applies to all cases when the result of the measurement is given to a homeowner or building official to determine the need for further measurements or remedial action.
		The exceptions to the 48-hour measurement period are for those cases when the results will not be reported to a homeowner or building official, but will be used by a mitigator or researcher within the context of their project or research.
	www.epa.gov /radon/pubs/devprot1.html (1619 words)

	Radon Measurements
		Radon is a colorless, odorless and tasteless gas that is unreactive chemically.
		Such measurements are not valid tests for whole-house radon concentrations and should not be used to make mitigation decisions.
		The plate-out occurs because the radon decay-product particles are positively charged and are therefore attracted to surfaces of the opposite charge.
	www.radon.utoledo.edu /Testing/Measure.html (798 words)

	Section 3 \| Measurement Device Protocols \| Publications \| Radon \| Indoor Air \| Air \| US EPA (Site not responding. Last check: 2007-10-10)
		Measurements made under closed-building conditions have a smaller variability and are more reproducible than measurements made when the building conditions are not controlled.
		An alternate measure of precision is a relative percent difference, defined as the difference between two duplicate measurements divided by their mean; note that these two measures of precision are not identical quantities.
		To determine the average radon concentration during the exposure period, the difference between the initial and final voltages is divided first by a calibration factor and then by the number of exposure days.
	www.epa.gov /iaq/radon/pubs/devprot4.html (6668 words)

	Frequently Asked Questions About Radon - NSC
		Radon is formed by the natural radioactive decay of uranium in rock, soil, and water.
		The protocol for measurements made for the purpose of assessing the need for mitigation (reducing the radon level) is found in the EPA publication, A Citizen's Guide to Radon.
		Because radon in indoor air is the larger health concern, the EPA recommends that you first test the air in your home for radon before testing for radon in your drinking water.
	www.nsc.org /issues/radon/faq.htm (6767 words)

	Radon Myths radonawareness.org
		Radon levels within the home are usually lower in the spring and fall, while being higher in the winter and summer.
		Although radon levels can vary widely throughout the year, short term tests are still recommended as the first step just in case your radon levels are extremely high.
		Radon is a major cause of cancer but is also suspected in contributing to a variety of other illnesses including Leukemia, Multiple Sclerosis, Alzheimers and Parkinson's Disease.
	www.radonawareness.org /RadonMyths.html (1460 words)

	measureradon
		In most States, radon measurement is needed as a part of the home inspection before selling your home.
		Measure radon now and let this not be last minute block while selling your home.
		Rad Elec has helped more than a thousand small businesses to start and run the radon measurement services to supplement their income substantially by providing all the tools, guidance and materials to be a licensed radon measurement service, providing best return on the investment.
	www.radelec.com /measureradon.html (317 words)

	Testing Methods
		In that case, EPA strongly recommends the use of a qualified radon measurement professional who has been trained in the proper placement of radon measurement devices and the interpretation of their results.
		Radon tests are to be placed no closer than 20 inches to the floor, and no closer than three feet from openings in exterior walls, such as windows and doors.
		If a continuous monitor (which measures radon or radon decay products hourly) is utilized, the average of the measurements is used to determine the need for follow-up, rather than the highest observed reading.
	www.arra.state.az.us /RadonWeb/testing.htm (1123 words)

	Radon and Real Estate
		Radon is not regulated in Minnesota, so it is up to homeowners themselves to decide how much radon is acceptable in their home.
		Radon is the leading cause of lung cancer for non-smokers in the United States.
		Because radon testing during real estate transactions is not required and radon in homes is not regulated in Minnesota, buyers and sellers are free to negotiate and respond as they choose to the issue of radon during real estate transaction in this state.
	www.health.state.mn.us /divs/eh/indoorair/radon/radonre.html (1916 words)

	Measure Radon with RadonZone.com: Radon Kits, Radon Home Test, Radon Test, Test Radon Level
		You can't see, smell, or taste radon but radon in the home may be a problem for you.
		Radon can be found all over the U.S. Radon comes from the natural (radioactive) breakdown of uranium in soil, rock, and water, entering the air you breathe.
		There are simple, relatively inexpensive measures for radon reduction that you can take to fix a radon problem and even very high levels can be reduced to acceptable levels.
	www.radonzone.com (538 words)

	Radon Detector, Short Term Radon Test Kit, Digital Radon Detector, Radon Gas Detector, Digital Radon Monitor
		Radon is odorless and colorless and there is no way to ensure the device is working properly without such crosschecks.
		As explained above, the use of a conventional kit is recommeneded for initial radon assessments and on a periodic basis thereafter.
		At the end of the radon gas test period, the test kit is sealed and sent to the laboratory in the pre-paid mailer for analysis.
	www.radonzone.com /radon-detector.html (1276 words)

	Springer Online Reference Works
		Measure in a topological vector space) defined on the Borel
		Radon (1913), whose original constructions referred to measures on the
		One can also define non-finite (non-negative) Radon measures; they are tight and take finite values on compact subsets.
	eom.springer.de /r/r077170.htm (231 words)

	Arizona Radon Program
		The primary goal of the home indoor radon survey was to determine the statewide distribution of radon in homes and identify areas of potentially high radon concentrations.
		To ensure the discovery of any existing high radon concentration within a home, the program called for the charcoal canister to be exposed under closed-house conditions.
		Radon has become a significant health concern nationally and will continue to be a problem until it is controlled within the indoor environment.
	www.arra.state.az.us /Radon.htm (998 words)

	Providing the Best Radon Detection Kit Available on the Web!
		Radon is an invisible and odorless radioactive gas which occurs naturally from decaying uranium underneath the earth's surface.
		Radon gas rises through the soil and seeps through cracks, holes and drain pipes in the foundation or basement of your home or office.
		Performing a radon test to determine the level of radon in your home or business is the only way to know if you and and those around you are at risk.
	www.diyradontest.com (383 words)

	RADON DETECTION LTD. - Specialists in Radon Solutions (Site not responding. Last check: 2007-10-10)
		If a person is exposed to high levels of Radon over a period of time the cells in their lungs could be damaged and eventually lead to lung cancer.
		Radon is a naturally occurring radioactive gas, which originates from the decay of uranium in rocks and soils.
		Radon is the heaviest of all gases, eight times heavier than air.
	www.radondetection.ie (168 words)

	RADON QUESTIONS AND ANSWERS
		Radon has a half-life of about four days - half of a given quantity of it breaks down every four days.
		Do not rely on radon test results taken in other buildings in the neighborhood - even ones next door - to estimate the radon level in your building.
		EPA's map of radon zones indicates areas having the greatest potential for elevated indoor radon readings.
	www.nsc.org /ehc/radon/rad_faqs.htm (6749 words)

	Radon Home Measurement and Mitigation
		Luckily a physical test can determine the concentration of Radon in your home and, if found high according to EPA guidelines, mitigation of the problem can be done.
		They have the advantage not to depend on the electrical systems in your home, and are not influenced by humidity levels, They are more likely used by home-owners who are concerned about their radon level or sellers before putting their home on the market as opposed to buyers during real estate transactions.
		These tests are usually used in a Commercial Environment because the OSHA guidelines governing the working environment were historically formulated in terms of the radiation level (Working Level) to which workers in the radiation industry were exposed.
	www.radon-mitigation.org /rhmmlevel.htm (347 words)

	NEHA NRPP Survey
		A person holding a Radon Resistant New Construction certification would have demonstrated the skills for installing passive radon systems during the construction of new buildings AND would have been educated on the health effects of radon and proper measurement techniques.
		As an example this would typically be a homeowner who questions the measurement report or the quality of a mitigation system.
		Upon receiving these, the Administrative Office (with the assistance of Technical Review Board members and other experts) have rendered an opinion to the "injured party" as to whether or not the specific information presented to it meets protocols and guidelines.
	www.radongas.org /survey.html (762 words)

	Johann Radon - Wikipedia, the free encyclopedia
		Johann Radon (December 16, 1887–May 25, 1956) was a mathematician born in Litoměřice in Bohemia (now Czech Republic).
		He wrote a doctoral dissertation on calculus of variations in 1910, at the University of Vienna.
		the Radon measure concept of measure as linear functional;
	en.wikipedia.org /wiki/Johann_Radon (119 words)

	Radon measure - Wikipedia, the free encyclopedia
		(It is possible to extend the theory of Radon measures to non-Hausdorff spaces, essentially by replacing the word "compact" by "closed compact" everywhere.
		is not sequentially compact with respect to the Radon metric: i.e., it is not guaranteed that any sequence of probability measures will have a subsequence that is convergent with respect to the Radon metric, which presents difficulties in certain applications.
		This page was last modified 23:08, 15 January 2007.
	en.wikipedia.org /wiki/Radon_measure (606 words)

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