1. introduction increasing of extreme events such as flood, hailstorm, drought, thermal waves, dust storm and other dangerous climatological events, especially in local scale, could be the result of the climatic change over the globe. the characteristics and impacts of severe weather are function of place and time of occurrence. severe weathers are usually accompanied by strong winds and heavy ...

An instability index, called the shape factor (SF), for weather forecasting was proposed using temperature profiles from a NASA/LaRC-hosted web-page featuring NOAA Rapid Update Cycle (RUC) radiosonde data used for short-term weather predictions. The index of instability was predicated on the sign and magnitude of the gradient of the equivalent potential temperature. A training data set of tempe...

purpose: current study aimed to predict marital instability based on identity styles and emotion regulation skills among married women in qouchan. methodology: 331 female teachers were selected using single-stage cluster random sampling and were asked to answer the identity style questionnaires (isi-6g), emotion regulation skill questionnaires (ersq) and marital instability index (mii). data we...

The number of avoidable cardiac arrests and unplanned admissions to ICU in step-down units (SDUs) remains too high. We have previously shown how a data fusion index, based on the integration of vital signs continuously monitored in SDUs, can identify the cardio-respiratory instability which often precedes these adverse events [1]. We show how the correlations between vital signs, captured in a ...

We study the problem of finding the instability index of certain non-selfadjoint fourth order differential operators that appear as linearizations of coating and rimming flows, where a thin layer of fluid coats a horizontal rotating cylinder. The main result reduces the computation of the instability index to a finite-dimensional space of trigonometric polynomials. The proof uses Lyapunov’s met...

A power system is modeled by an interaction form, the solution of which is called a settlement. By stability we mean the existence of some settlement for any preference profile. Like in other models of power structure, instability is equivalent to the existence of a cycle. Structural properties of the system like maximality, regularity, superadditivity, subadditivity and exactness are defined a...

Total internal reflection occurs for large angles of incidence, when light is incident from a high-refractive-index medium onto a low-index medium. We consider the situation where the low-index medium is active. By invoking causality in its most fundamental form, we argue that evanescent gain may or may not appear, depending on the analytic and global properties of the permittivity function. Fo...