Indoor location

In order to assess the accuracy of the present method, we compared it with two other methods. One was the Track Etch detector manufactured by the Terradex Corp. (type SF). Simultaneous measurements with our detectors and the Terradex detectors in 207 locations were made over 10 months. The correlation coefficient between radon concentrations derived from these methods was 0.875, but the mean value by the Terradex method was about twice that by our detectors. The other method used was the passive integrated detector using activated charcoal which is in a canister (Iwata, 1986). After 24 hour exposure, the amount of radon absorbed in the charcoal was measured with Nal (Tl) scintillation counter. The method was calibrated with the grab sampling method using activated charcoal in the coolant and cross-calibrated with other methods. Measurements for comparison with the bare track detector were made in 57 indoor locations. The correlation coefficient between the results by the two methods was 0.323. In the case of comparisons in five locations where frequent measurements with the charcoal method were made or where the radon concentration was approximately constant, the correlation coefficient was 0.996 and mean value by the charcoal method was higher by only 12% than that by the present method. 

Schery, S.D., Measurements of Airborne Pb and uRn at Varied Indoor Locations Within the United States, Health Physics 49 1061-1067 (1985). 

Schery SD. 1985. Measurements of airborne lead-212 and radon-220 at varied indoor locations within the United States. Health Phys 49 1061-1067. 

Some VOCs can be malodorous pollutants, sensory irritants, or hazardous air pollutants. Hazardous VOC air pollutants include acetaldehyde, benzene, carbon tetrachloride, chloroform, ethylbenzene, formaldehyde, hexane, methylene chloride, naphthalene, paradichlorobenzene, pesticides (biocides), styrene, tetrachloroethylene, toluene, trichloroethylene, and xylenes. They are found in essentially all indoor locations, released by off gassing from numerous sources, such as construction and decorating materials, consumer products, paints, paint removers, furnishings, carpets, and from combustion of wood, kerosene, and tobacco. While more than 500 VOCs have... 

Liquid immersed types use various forms of oil and special synthetic liquids. The chlorinated liquids, e.g. polychlorinated-biphenyl, have been banned in most countries because they are very strong pollutants and are almost impossible to destroy, except by intensive burning in a special furnace. Modern liquids are synthetic compounds typically silicone based, and are usually specified to be flame retardant. 1EC60296, 60836, and 60944 describe suitable liquids. These transformers are the type normally used in oil and gas plants. Resin insulated transformers are very suitable for indoor locations and off-shore plants because they contain no flammable liquid, produce no spillage and require minimal maintenance. They are usually more expensive than conventional liquid immersed transformers. 

The NEMA coding system specifically inclndes three categories for equipment that is to be installed in oil industry hazardous areas, namely Types 7, 8 and 9, bnt only for indoor locations. 

One excellent example of a multiana-lytical laboratory study is the influence of submicron sized particles of ammonium sulfate ((NH4)2S04) on the atmospheric corrosion of selected metals [22]. These particles were aerosolized and deposited under dry conditions on the metal surface, whereby the deposited amounts corresponded to up to 10 years of exposure in indoor locations of USA. By introducing humidity into the exposure... 

A Fuzzy Logic Approach to Indoor Location Using Fingerprinting... 

Some of the most used technologies for indoor location include the use of infra-red [15], ultrasonic waves [16], pressure sensors [8], RFID (Radio Frequency Identification) [13] and wireless communications networks [1, 9, 10]. In what concerns to the methodologies used to obtain the location, they can be divided into three main areas [3] Triangulation, Proximity and Scene Analysis. 

Mestre P, Pinto H, Moura J, Oliveira P, Serodio C (2010) Multiple wireless technologies fusion for indoor location estimation. International conference on Indoor Position and Indoor Navigation (IPIN2010). Abstract volume, 15-17 September 2010, Campus Science City, ETH Zurich, pp 69-70... 

Installing or upgrading main or auxiliary ventilation systems, such as tailpipe or stack exhaust vents to capture and remove emissions in maintenance shops or other indoor locations. 

Electronics are exposed to a wide range of outdoor and indoor environments generally considered as atmospheric exposure. The corrosion behavior is determined by the actual environment, which can be as benign as a simple low humidity, purified atmosphere, indoor location, to the aggressive environment existing at a pulp and paper mill or on an automobile, which is subjected to road salt splash and spray. The electronics design as well as the nature of the environment are important because failures in printed circuit boards, integrated circuits, and other components have been known to occur even in extremely low levels of moisture and contaminants. Electronics components are mostly indoor or sheltered from direct exposure to liquid splash, spray, rain, snow, etc., and therefore the environment is considered atmospheric exposure. 

Location. A vented Type 1 enclosure is acceptable in indoor locations where the location is dry and relatively dust-free. Type 1 enclosures allow air to enter the enclosure and cool the components inside. Any moisture present or an excessive amount of dust, dirt, or other airborne contaminants allowed to enter a Type 1 enclosure could cause damage to the motor control. 

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