this study was accomplished to investigate the effect of artemia urmiana nauplii enriched with pediococcus acidilactici as probiotic on growth performance and survival rate of great sturgeon, huso huso.  artemia nauplii were enriched with p. acidilactici at a final concentration of 1010 cfu ml-1 in three time dependent treatments as 3 h (t3), 6 h (t6), 9 h (t9), and one non-enriched artemia as ...

background: adolescent pregnancy and childbirth are associated with increased risk and challenges for both mothers and birth outcomes. objective: to investigate the associations of growth change over time with parenting factors and to compare the differences between children born to adolescent and adult mothers in taiwan. materials and methods: the dataset retrieved from taiwan birth cohort stu...

When it comes to the inequality-growth relationship, the empirical literature offers contradictory assessments: Estimators based on time-series variation only (i.e., differencesbased estimators) indicate a strong positive link while estimators also exploiting the crosssectional variation (i.e., level-based estimators) suggest a negative relationship. Taking advantage of a new dataset, the prese...

A simple transformation of the Watts poverty index yields a ‘‘meaningful’’ measure with appealing ordinal properties and a natural interpretation in terms of the potential for economic growth to alleviate poverty. The index is illustrated with data from Bangladesh and Bolivia.  1998 Elsevier Science S.A.

In the paper the model of early stage of tumour growth is described. Two main cellular processes are considered — proliferation and apoptosis. We focused on the effect of time delays in both processes. Mathematical analysis and computer simulations are presented. INTRODUCTION Many models which study different stages and effects of tumour growth were proposed and studied within last years, e.g. ...

We build a model in which the arrival of new technologies displaces demand for old technologies. This disruption causes redistribution due to lack of risk sharing both within and across investor cohorts. We model the financial industry as a costly device to improve risk sharing, and determine its size in equilibrium. We further study wealth dynamics, equilibrium prices, and flows into various a...

We propose a new class of mappings, called Dynamic Limit Growth Indices, that are designed to measure the long-run performance of a nancial portfolio in discrete time setup. We study various important properties for this new class of measures, and in particular, we provide necessary and su cient condition for a Dynamic Limit Growth Index to be a dynamic assessment index. We also establish their...

How great an effect does self-generated spatial structure have on logistic population growth? Results are described from an individual based model (IBM) with spatially localised dispersal and competition, and from a deterministic approximation to the IBM describing the dynamics of the first and second spatial moments. The dynamical system incorporates a novel closure that gives a close approxim...

We analyze a model economy with many agents, each with a different productivity level. Agents divide their time between two activities: producing goods with the production-related knowledge they already have, and interacting with others in search of new, productivity-increasing ideas. Each meeting involves two people, each with a different productivity level. Both parties emerge from a meeting ...

The West-Brown-Enquist universal growth curve has been mapped on the power law function with the time-dependent scaling factor and exponent representing the temporal fractal dimension of the growth of species like mammals, birds, fish, crustaceans, regardless of taxon, cellular metabolic rate and body size. The results obtained permit formulation of three important rules governing the biologica...