Abstract. The effect of tidal triggering on earthquake occurrence has been controversial for many years. This study considered earthquakes that occurred near Taiwan between 1973 and 2008. Because data are nonlinear non-stationary, we applied the empirical mode decomposition (EMD) method to analyze temporal variations in number daily investigate triggering. We compared results obtained from non-declustered catalog with those two kinds declustered catalogs discuss aftershock EMD-based...

This study was undertaken to investigate the relationship between cerebrospinal fluid abnormalities and prognosis in pediatric refractory purulent meningitis. Ninety cases of meningitis were stratified into "good" (n=33) or "poor" (n=57) groups according Glasgow clinical outcome scores. The symptoms, laboratory results, compared by using univariate multivariate logistic regression analyses. Univariate analysis showed that poor associated with: unequal pupil size both eyes; positive Babinski...

Abstract Geoelectric self‐potential (SP) signals are sensitive to natural and anthropogenic factors. The SP spectral characteristics under the different factors in Taiwan were investigated, scalings correlated with urbanization level, seismicity, crustal deformation. ambient noise models first established by estimating probability density functions of spectrograms at each frequency. effects on understood comparing various conditions, such as precipitation, urbanization, electric trains....

The earthquake-alarm model developed by Chen and (Nat.Hazards 2016) is investigated to validate its forecasting performance for the 2016/2/6, M L 6.6 Meinong, Taiwan earthquake.This alarm based on geoelectric field skewness kurtosis anomalies.The parameters, such as detection range predicted time window, allow us estimate empirical relationships between anomalies large earthquakes.As a result, are shown appear before Meinong earthquake four neighboring stations (LIOQ, WANL, KAOH,...

In this study, plasma-enhanced atomic layer deposition (PEALD) was used to coat biodegradable magnesium-calcium (Mg-Ca) alloys with Al₂O₃ and ZrO₂ multilayer films the objective of enhancing their corrosion resistance biocompatibility. The effects single-, double-, four-layer structures, each a total thickness approximately 20 nm, were compared on mechanical properties alloys. analyzed using X-ray diffraction (XRD) transmission electron microscopy (TEM), while rates in simulated biological...

The seismo-electrical coupling is critical to understand the mechanism of geoelectrical precursors earthquakes. A novel model, called Chen–Ouillon–Sornette (COS) has been developed by combining Burridge–Knopoff spring-block system with mechanisms stress-activated charge carriers (i.e., electrons and holes) pressure-stimulated currents. Such a thus, can simulate fracture-induced electrical signals at laboratory scale or earthquake-related geological scale. In this study, using information...

Earthquakes are reported to relate rupture phenomena in complex self-organizing systems. Hence, the earthquake is regarded as a critical point. The preparation process of an could be considered crustal system approaching this Complex dynamical systems can have tipping points at which sudden shift contrasting regime may occur; meantime, time series behave much differently. Although it extremely challenging predict such before they reached, work different scientific fields now suggesting...

We examine the precursory behavior of geoelectric signals before large earthquakes by means an algorithm including alarm-based model and binary classification. This algorithm, introduced originally Chen [Nat. Hazards., 84, 2016], is improved removing a time parameter for coarse-graining earthquake occurrences, as well extending single station method into joint stations method. also determine optimal frequency bands earthquake-related with highest signal-to-noise ratio. Using significance...

We introduce the first fully self-consistent model combining seismic micro-ruptures occurring within a generalized Burridge-Knopoff spring-block with nucleation and propagation of electric charge pulses coupled mechano-electrokinetic system. This provides general theoretical framework for modeling analyzing geoelectric precursors to earthquakes. In particular, it can reproduce unipolar that have often been reported before large events, as well various observed anomalies in statistical...

Abstract. Geoelectric time series (TS) has long been studied for its potential probabilistic earthquake forecasting, and a recent model (GEMSTIP) directly used the skewness kurtosis of geoelectric TS to provide Time Increased Probabilities (TIPs) earthquakes in several months future. We followed up on this work by applying Hidden Markov Model (HMM) correlation, variance, skewness, TSs identify two States (HSs) with different distributions these statistical indexes. More importantly, we...

<p>Electromagnetic anomalies have become promising for short-term earthquake forecasting. One forecasting algorithm based on statistical moments of geoelectric data was developed and applied in Taiwan. The objective our research to investigate such a reliable, rigorously testable issue forecasts. We tested the applicability it an catalog Kakioka, Japan with long-term period 26 years. calculated variance, skewness, kurtosis each day, determined their anomalies, then compared...

Abstract. Geoelectric time series (TS) have long been studied for their potential probabilistic earthquake forecasting, and a recent model (GEMSTIP) directly used the skewness kurtosis of geoelectric TS to provide times increased probability (TIPs) earthquakes several months in future. We followed up on this work by applying hidden Markov (HMM) correlation, variance, skewness, TSs identify two states (HSs) with different distributions these statistical indexes. More importantly, we tested...