‎In this work we introduce and study discrete time periodically correlated stable‎ ‎processes and multivariate stationary stable processes related to periodic and cyclic‎ ‎flows‎. ‎Our study involves producing a spectral representation and a‎ ‎spectral identification for such processes‎. ‎We show that the third‎ ‎component of a periodically correlated stable process has a component related to a...

This paper introduces new insights into the hydrochemical functioning of lowland river systems using fieldbased spectrophotometric and electrode technologies. The streamwater concentrations of nitrogen species and phosphorus fractions were measured at hourly intervals on a continuous basis at two contrasting sites on tributaries of the River Thames – one draining a rural catchment, the River En...

In this paper, an autocorrelation and cross-correlation analysis of the flow Kupa Sava rivers was performed. The performed at hydrological stations close to confluence these two near city Sisak, based on data mean daily flows precipitation. analysed time period is from 2008 2017, with series being divided into parts five years each, 2012 2013 2017. Daily were measured Farkašić River Crnac River...

Watershed scale hydrology and water quality models (DRAINMOD-DUFLOW, DRAINMODW, DRAINMOD-GIS and WATGIS) that describe the nitrogen loadings at the outlet of poorly drained watersheds were examined with respect to their accuracy and uncertainty in model predictions. Latin Hypercube Sampling (LHS) was applied to determine the impact of uncertainty in estimating field exports and decay coefficien...

ESPON ATTREG project aims to investigate the motivation and behaviour of migration flows and daily commuting of students, tourists, aging population migrating to their secondary homes, students and other “part time” commuters – but especially behaviour of human resources in gross migrations and daily commuting – between regions. One of the key elements of the cohesion policy of the European Com...

Environmental variation plays a central role in regulating processes at all levels of ecological organization. Environmental data (e.g., temperature, rainfall, stream discharge, water chemistry) are typically easy to collect in large quantity, a requirement for many datahungry time series tools. Unfortunately, these data are very rarely used effectively in ecology. Here we address this problem ...

background the long-term consequences and the activities of daily living of bilateral lower limb amputatees are not well documented. objectives our study identifies the long-term effects of bilateral lower extremity amputations on daily activities to understand how these amputees cope with their mobility assistive devices. materials and methods a total of 291 veterans of war with bilateral lowe...

we prove the existence of steady 2-dimensional flows, containing a bounded vortex, and approaching a uniform flow at infinity. the data prescribed is the rearrangement class of the vorticity field. the corresponding stream function satisfies a semilinear elliptic partial differential equation. the result is proved by maximizing the kinetic energy over all flows whose vorticity fields are rearra...