[1] At 17:47 UT on 20 September 1999, a large earthquake of magnitude Mw 7.6 struck the central Taiwan near a small town of Chi‐Chi. The ground‐based receivers of the global positioning system (GPS) in the Taiwan area detected coseismic ionospheric disturbances (CIDs) in the total electron content (TEC) triggered by the Chi‐Chi earthquake. When the CIDs travel away from the origin on the Earth ...

Division of Nephrology, Department of Medicine, Taichung Veterans General Hospital*, Chung-Shan Medical University Hospital**, Institute of Clinical Medicine, National Yang Ming University***, Taichung, Taiwan Received: April, 2005 Revised: April, 2005 Accepted: May, 2005 Address reprint requests to Dr. Kuo-Hsiung Shu, Division of Nephrology, Department of Medicine, Taichung Veterans General Ho...

The Chi square test is a statistical test which measures the association between two categorical variables. A working knowledge of tests of this nature are important for the chiropractor and osteopath in order to be able to critically appraise the literature.