Removal of baseline wander (BW) is an important preprocessing step before manually or automatically interpreting electrocardiogram (ECG) records. It a challenging issue to fully remove BW while preserving original clinical information because usually mingled with low-frequency ECG components. A dual-adaptive approach based on discrete cosine transform (DCT) presented in this study. Firstly, the...

The variance of time series records relating to ENSO, such as the interannual anomalies or bandpass filtered components of equatorial Pacific SST indices, provides one approach to quantifying changes in ENSO amplitude. Robust assessment of the significance of changes in amplitude defined in this way is, however, hampered by uncertainty regarding the sampling distributions of such variance metri...

The application of statistical communication techniques to the analysis of intestinal motility records has made available certain information that has heretofore been obscure. This information is: 1. A measure of total activity expressed in square millimeters of Hg. 2. The frequency and amplitude of segmental activity. 3. A measure of the random variations in the amplitude of the "segmental" wa...

Many long-term geomagnetic observation results recorded on photographic bromide paper have not yet been fully digitized. To that end, we developed a method to automatically convert photographic records to one-minute digital data. We applied our method to the observation records of Kakioka Magnetic Observatory and confirmed that the resolution of time and amplitude could be greatly improved by n...