Conducting laboratory tests on natural rocks has significant value for the scientific and practical advancement of various types of rock engineering.The investigation of a rock-like materials that is similar in characteristics and structure to natural rock is key to the further advancement of laboratory rock experiments.The rapid development of san
High-entropy alloys (HEAs) were fabricated by powder metallurgy using gas-atomized ej10 powder and spark plasma sintering (SPS) followed by surface modification (plasma nitriding) of the sintered sample.Plasma nitriding forms nitride and induces solid-soluting of N; it enables the diffusion of N atoms by removing the passive film formed on the surf
Modernisation of the existing river fleet adapted for the local conditions of the Middle and Lower Vistula can be considered as a solution to slow down the progressive decrease of river transport miken pro series 13 in this area.The implementation of technical improvements, smart technologies and enhancement of transport performance may partially s
This article employed the ARCH, GARCH and EGARCH models to model the oil price volatility and macroeconomic variables in South Africa for the period 1990Q1 to 2018Q2.The macroeconomic variables used in the study are GDP, inflation, interest rate and exchange rates.According to ARCH (1) and GARCH (1, 1) models, exchange rate and interest rate have a
The rumen microbiome has the important task of supplying ruminants with most of their dietary requirements and is responsible for up to 90% of their metabolic needs.This tremendous feat is possible due to the large diversity of microorganisms in caramilk latte the rumen.The rumen is considered one of the most diverse ecosystems on the planet in ter