Measurement and analysis of earth's magnetic field based on low-magnetic field standards
The Cheongyang (CYG) observatory has been built to measure earth's magnetic field and to study prediction of earthquake and space weather. The equipments of the CYG observatory are a 3-axis fluxgate magnetometer, an overhauser effect proton magnetometer, a declination/inclination magnetometer and a data logger. A Cs-4He atomic magnetic resonance magnetometer was used to correct the measured data obtained by the proton magnetometer. All the measurement equipments were calibrated using magnetic field standard system maintained at KRISS. The Measurement results show a variation of the baselines less than 5 nT within one year, which is the most critical requirement criteria for joining the INTERMAGNET (International Real-time Magnetic Observatory Network).
Inducement of Artificial Sleep using Low Strength Magnetic Waves
Every human need eight to ten hours sleep every day for healthy and good functioning of brain and body. Proposed system induces sleep using low frequency, low strength magnetic waves produced by using coil circuitry. Majority of age people, people with anxiety, stress, depressed feel difficulty to get sleep due to few unknown factors. Our proposed system will induce sleep without drugs, meditation and other chemical-based methods having huge side effects.
Experimental determination of the gyromagnetic ratio of the helium-4 atom in terms of that of the helium-3 nucleus
The ratio of the /spl gamma//sup 4/He//spl gamma//sup 3/He has been measured using a gaseous sample in the low magnetic field. The result is /spl gamma//sup 4/He//spl gamma//sup 3/He=864.02276(0.03 ppm), leads to a value of /spl gamma//sup 4/He=1760.78798(0.3 ppm)/spl middot/10/sup 8//spl middot/rad/spl middot/s/sup -1//spl middot/T/sup -1/ using 1990 recommended value of /spl gamma//sub p/'=2.6751542(8)/spl middot/10/sup 8//spl middot/rad/spl middot/s/sup -1//spl middot/T/sup -1/ and /spl gamma//sup 3/He//spl gamma//sub p/'=0.7617861313(33) of Flowers et al. (1993).