41 research outputs found
Hydrogen-Helium Mixtures at High Pressure
The properties of hydrogen-helium mixtures at high pressure are crucial to
address important questions about the interior of Giant planets e.g. whether
Jupiter has a rocky core and did it emerge via core accretion? Using path
integral Monte Carlo simulations, we study the properties of these mixtures as
a function of temperature, density and composition. The equation of state is
calculated and compared to chemical models. We probe the accuracy of the ideal
mixing approximation commonly used in such models. Finally, we discuss the
structure of the liquid in terms of pair correlation functions.Comment: Proceedings article of the 5th Conference on Cryocrystals and Quantum
Crystals in Wroclaw, Poland, submitted to J. Low. Temp. Phys. (2004
Regression Models of Koch Wire Dipole Performance
A family of balanced wire dipoles with the geometry of arms similar to the first-order Koch pre-fractal is considered. Regression and correlation analysis is performed for parameters defining the geometry of the considered antennas and their electrodynamic characteristics. A high degree of correlation of the base frequency and bandwidth with the dipole wire length is obtained. Regression models are developed for some of the electrodynamic characteristics of the antenna. Possibility of structural and parametrical synthesis of the wire antenna with predefined properties on the basis of regression models is shown