A compact tilt accelerometer with high sensitivity at low frequency was designed to provide low frequency corrections for the feedback signal of the Advanced Laser Interferometer Gravitational Wave Observatory active seismic attenuation system. It has been developed using a Tungsten Carbide ceramic knife-edge hinge designed to avoid the mechanical 1/f noise believed to be intrinsic in polycryst...

The vertical housing system is a solution for the urban population which continues to increase as time goes. By using high-rise buildings, land used will be more effective. However, buildings have their own problems, one of bending due load acting on building. One loads that causes in wind load. Bending cause major problem building’s endurance if deviation exceeds structural strength tolerance ...