The natural flow regime (i.e. magnitude, frequency, duration, timing and rate of change events) is crucial for maintaining freshwater biodiversity ecosystem services. Protecting instream from anthropogenic alterations first requires an understanding the relationship between aquatic organisms regime. In this study, we used a unique framework based on random forest modeling to quantify effects me...

We show that trajectories of the ABC flow in the near-integrable regime are typically of two distinct types: spiral waves and edge transport orbits. We prove existence of special helical orbits (spiral waves), which belong to the Kolmogorov-Arnold-Moser (KAM) regime, by using the contraction mapping principle in the Hamiltonian formulation. In the non-integrable regime we also find and analyze ...

in this research, the numerical method of computational fluid dynamics and dimensionless parameter of froude number have been applied to determine the flow regime over ogee spillways.froude number is a dimensionless dynamic parameter calculated using the square root of the ratio of inertia force and gravitational force. considering that the study of the regimes of flow over hydraulic structures...

A river flow regime describes an average seasonal behaviour of flow and reflects the climatic and physiographic conditions in a basin. Differences in the regularity (stability) of the seasonal patterns reflect different dimensionality of the flow regimes, which can change subject to changes in climate conditions. The empirical orthogonal functions (EOF) approach can be used to describe the intr...

We examine the characteristics of helical flow in a concentric annulus with radii ratios of 0.52 and 0.9, whose outer cylinder is stationary and inner cylinder is rotating. Pressure losses and skin friction coefficients are measured for fully developed flows of water and a 0.4% aqueous solution of sodium carboxymethyl cellulose (CMC), when the inner cylinder rotates at the speed of 0~62.82 rad/...

The transition from frictional to lubricated flows of a dense suspension of non-Brownian particles is studied. The pertinent parameter characterizing this transition is the Leighton number Le=eta(s)gamma / sigma, the ratio of lubrication to frictional forces. Le defines a critical shear rate below which no steady flow without localization exists. In the frictional regime the shear flow is local...

In order to prevent the severe slugging flow regime in multiphase transport pipelines, active feedback control is the recommended solution. Instead of elaborated models such as CFD and OLGA models, a simple dynamical model with few state variables is required in a model-based control system. We propose a new simplified dynamical model for severe slugging flow in pipeline-riser systems. The prop...

Lack of substantial occupational therapy research is a recognized and persistent problem; which is often discussed throughout the literature but not truly addressed. Action must be taken to involve clinicians in the effort to substantiate the efficacy of treatments through outcome studies. We offered several proactive recommendations that could be implemented on a national level to encourage he...