Dementia Is a Terminal Illness, But Palliative Care Often Poor. October 16, 2009 â A new study looking at the natural history of dementia into its end stages finds high rates of complications, high 6-month mortality rates, and a high number of distressing symptoms and aggressive interventions of questionable benefit.
Measuring Earthquakes. The vibrations produced by earthquakes are detected, recorded, and measured by instruments call seismographs. The zig-zag line made by a seismograph, called a seismogram, reflects the changing intensity of the vibrations by responding to the motion of the ground surface beneath the instrument.
A seismograph, or seismometer, is an instrument used to detect and record seismic waves.Seismic waves are propagating vibrations that carry energy from the source of an earthquake outward in all directions. They travel through the interior of the Earth and can be measured with sensitive detectors called seismographs.ideo: How a seismograph works. The magnitude of an earthquake is determined by readings of the seismic waves resulting from the vibrations generated by the seismic source. Sensitive seismographs, which greatly magnify these ground motions, can detect strong earthquakes from sources anywhere in the world.