Radio transmissions

The AEG sponsored research ia the program known as Systems for Nuclear AuxiHary Power (SNAP) as early as the 1950s. Most of the systems developed iavolved the radioisotope plutonium-238 as a heat source for a thermoelectric generator. Such electrical suppHes permitted radio transmission to earth from spacecraft such as Pioneer and l qyager. 

Guglielmo Marconi, the Italian engineer and inventor, visited Alexanderson in 1915 and bought one of his 50-foot alternators for the transatlantic Marconi Center in New Jersey. Within a few years, Alcxatidcrson s alternators were to be found in numerous countries. Using a 200-foot Alexanderson alternator, Marconi broadcast radio transmissions during World War I that were heard all over Europe. 

Radio waves Electron excitation o A 1 7 o Radar radio transmission... 

At 1 14 p.m., the operator received a radio transmission from the PCC (Process Control Center) informing him that a "low" gas alarm had been received. Immediately, the operator was informed of two more gas alarms. Upon reaching the E l module, the operator noted the sound of gas escaping somewhere inside the production module. At approximately 1 22 p.m. he climbed the stairs to the E l control room and opened the door to check the fire and gas alarm panel which indicated a high gas atmosphere in the production modules. The operator then requested the Emergency Response Team be put on standby and went to inform three contract workers, in the area of the danger. 

TV transmissions Short-wave radio transmissions Satellite transmissions Electrical blankets Appliances Light bulbs... 

There are precedents that indicate this is indeed likely to be the case. For example, around the middle of the nineteenth century, the Scottish physicist James Clerk Maxwell developed a theory that gave a unified explanation of the phenomena of electricity and magnetism. Not only did the theory suggest that light was made up of electromagnetic waves, it also led to the discovery of such new phenomena as radio transmission. 

Although there is no interference from other NQR signals, other types of signals may interfere with NQR explosives detection. For unshielded detector coils, the primary culprit is RF interference (RFI). Most NQR frequencies of interest for explosives detection fall in the frequency range of 0.5-5 MHz. The biggest problem in this range is the amplitude modulation (AM) radio band, from 0.5 to 1.5 MHz. Besides radio transmissions, other sources of RFI can include nearby electrical equipment, power transmission lines and lightning strikes. 

Keep all leg wires neatly rolled up and tied together as a deterrent against errant radio transmissions that could cause premature detonation. 

Electrical generating equipment, radar equipment, radio transmission and receiving equipment and aircraft... 

Microwave and radiofrequency (RF) The spectral region where cellular heating is induced. Examples are microwaves and radio transmissions. 

Other effects (frequency, conductivity, specific heat capacity, etc.) are discussed by Schiffmann (1995), but are less relevant because the range of available frequencies (which do not interfere with radio transmissions) is small (2.45 GHz, 910 MHz). Lower frequencies lead... 

The instrument package transmits barometric, relative humidity, and temperature data to the ground by radio transmission using a multiplexing system. The system transmits the different kinds of data in rotation, for example, temperature first, followed by humidity, and then pressure. 

The first voice transmission over cables (1876) and by radio waves (1896), the first radio transfer of video images (1936), the first electronic computer (1944), and the first transistor (1948) preceded this milestone of technical history, but the first microprocessor (1971) and the first IBM personed computer (1981), as well as the first digital radio transmission of voice (1988) and image (1991), came later. 

The first officer, who made all recorded radio transmissions in English, never used the word Emergency," even when he radioed that two engines had flamed out, and he did not use the appropriate phraseology published in United States aeronautical pubUcations to communicate to air traffic control the flight s minimum fuel status. (NTSB 1991, p. 75, emphasis added)... 

The Black Hawks and F-15s were on different radio frequencies and thus the pilots could not speak to each other or hear the transmissions between others involved in the inddent, the most critical of which were the radio transmissions between the two F-15 pilots and between the lead F-15 pilot and personnel onboard the AWACS. The Black Hawks, according to the Aircraft Control Order, should have been communicating on the TAOR frequency. Stopping here and looking only at this level, it appears that the Black Hawk pilots were at fault in not changing to the TAOR frequenqr, but an examination of the higher levels of control points to a different conclusion. 

The Delta Point system, used since the inception of OPC, provided standard code names for real locations. These code names were used to prevent the enemy, who might be listening to radio transmissions, from knowing the helicopters flight plans. 

By the time he arrived on borrowed funds at Cambridge in September 1895 to take up work at the Cavendish under its renowned director, J. J. Thomson, Rutherford had elaborated his observation into a device (ct detecting radio waves at a distance— in effect, the first crude radio receiver. Guglielmo Marconi was still laboring to perfect his version of a receiver at his father s estate in Italy for a few months the young New Zealander held the world record in detecting radio transmissions at a distance. 

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