In this work, we report a new chaotic population biology system with one prey and two predators.Our new chaotic population model is derived by introducing two nonlinear interaction terms between the prey and predator-2 to the Samardzija-Greller population biology system (1988).We show that the new chaotic population biology system has a greater val

This study aimed to analyze factors that could influence continuous usage intention on freemium applications and purchase intention of premium services among students.Non-probability purposive sampling was used to determine the respondent.The criteria for the sample for this study were students who used freemium applications.Data were analyzed usin

billionaire boys club discount code 2023 We document the absence of carriage of Neisseria meningitidis W-135 of the sequence type 11 in returning pilgrims after the Hajj 2002.This finding contrasts with the 15% carriage rate we previously reported in pilgrims returning from the Hajj 2001.The epidemiology of carriage may be changing or may have been

Three low-cost adsorbents (purified raw attapulgite (A-ATP), high-temperature-calcined attapulgite (T-ATP), and hydrothermal loading of MgO (MgO-ATP)) were prepared as adsorbents for the removal of Cd(II) and Pb(II).By evaluating the effect of the initial solution pH, contact time, initial solution concentration, temperature and coexistence of meta

A commonly held view in evolutionary biology is that speciation (the emergence of genetically distinct and reproductively incompatible subpopulations) is driven by external environmental constraints, such as localized barriers to dispersal or habitat-based variation in selection pressures.We have developed a spatially explicit model of a biological