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Larger than the antenna dimensions these two figures are interrelated via a easy mathematical formula, and if 1 is known, it can be used to estimate the other. Conversation between the monitoring stations and the Computer at the central control station is achieved by way of a special GSM modem. It is recognized that normal modems permit conversation between PCs throughout a set telephony community in order to allow link to the internet. A GSM modem enables communication between PCs more than a cellular telephony community. Offered that the checking stations are outfitted with this kind of modems, the administrator can link to monitoring stations at any given time (a process comparable to placing a call on a cellular phone) in order to transfer the saved measurements to the central control station Computer. Once the measurements are received from the monitoring stations they are saved in a database. This database contains a total dataset for every measurement, in other phrases, the station of origin, the date and time it was recorded, the six minute typical effective value, the maximum recorded effective value in the particular six minute period, checking station temperature and so on. The six minute time period has been adopted in Greece as in other nations as the measurement and benchmarking time period at reference ranges (security ranges). When guests of the website ask for information, a database lookup is carried out and the data produced are offered in diagram structure to make it simpler for the community to comprehend. Visitors of the HERMES Project web site can "generate" energy flux density graphs for the overall frequency variety measured (100KHz to 3GHz) by selecting the monitoring station and time period they are intrigued in. (Diagram two). Diagram 2 Graph showing typical energy flux density values for the complete frequency variety Diagram three Graph displaying average energy flux density values for the GSM 1800 UMTS frequency variety Moreover, it is possible to produce graphs of power flux density for the frequency bands that mobile telephony antennas operate at (GSM 900 and GSM1800 UMTS). (Diagram 3). In both these diagrams a acheter nike free run pas cher comparison is produced with the stricter (lower) reference degree in each frequency band (the dotted lines) set by Greek laws (Joint Ministerial Choice No. 53571/3839 on measures to shield the public from the operation of land primarily based antennas, Government Gazette 1105/B/six.nine.2000, and Law 3431/2006 on digital communications and other provisions, Government Gazette thirteen/A/three.two.2006). For the overall frequency band, the nike free run pas cher stricter (reduce) reference acheter nike free run 2 level has a value of one.2 W/m (the frequency band that FM radio broadcasts operate at) while for the two operating frequency bands nike free pas cher of the mobile telephony antennas (GSM 900 and GSM 1800 UMTS) the stricter reference levels have values of nike free run 2 pas cher 2.7 W/m and five.4 W/m respectively, figures which have been established by the Greek Atomic Energy Commission (GAEC Reality sheet: Cellular Telephony and Health Concerns Answers). If an antenna is located in an electromagnetic field with a