BACKGROUND Myocardial infarction (MI) is often preceded by unstable angina. Helping patients identify the onset of unstable angina rather than MI may result in earlier treatment and improve outcomes. Unstable angina is angina occurring at a lower-than-usual workload. Since heart rate (HR) is correlated with degree of exertion, we hypothesised that angina occurring at low HR is a warning signal ...

Early warning systems are key components of strategies to reduce risk. This research, by adopting a systematic approach in the management of the risk of desertification and by including previously developed models and systems, offers an integrated efficient structure in terms of early warning for the risk of desertification as a pilot system for semi-arid areas of west Golestan Province in IRAN...

Department of Biological Physics, Eötvös University, Budapest, Hungary, Department of Mathematics, University of Turku, Turku, Finland, Department of Genetics, Eötvös University, Budapest, Hungary, Adaptive Dynamics Network, International Institute for Applied Systems Analysis, Laxenburg, Austria, Section Theoretical Evolutionary Biology, Institute of Evolutionary and Ecological Sciences (EEW),...

On March 11, 2011 an unusually strong earthquake, now called the Tohoku earthquake, occurred off the north-eastern coast of Japan's main island, Honshu. While the earthquake caused some destruction, the ensuing tsunami about three quarters of an hour later largely destroyed numbers of towns and devasted cities such as Sendai. http://earthquake.usgs.gov/earthquakes/eqarchives/poster/2011/2011031...

A variety of user-friendly spreadsheet templates have been developed for geoscience studies. However, the use of the built-in matrix functions within spreadsheet programs, such as Excel, is not particularly straightforward, lowering the value of spreadsheet programs for matrix-based computations, such as multiple regression analyses. Therefore, this study first developed two applications for Ex...

the purpose of this paper is to examine the determinants of the timing of bank failure/merger in 10 asian countries over the period of 1999-2007 using a multivariate logit model and a split population duration analysis. apart from bank-specific information, we also focus on the effects of macroeconomic and financial characteristics. the following empirical findings are obtained. first, the resu...

Empirical evidence for large-scale abrupt changes in ecosystems such as lakes and vegetation of semi-arid regions is growing. Such changes, called regime shifts, can lead to degradation of ecological services. We study simple ecological models that show a catastrophic transition as a control parameter is varied and propose a novel early warning signal that exploits two ubiquitous features of ec...