THIS HISTORICAL STUDY PRESENTS AN EXPLANATION OF SAUDI INFLUENCE IN THE NORTHWEST OF THE ARABIAN ISLAND DURING THE PERIOD (1208-1227 AH/ 1793-1812 AD)

This historical study presents an explanation of Saudi influence in the northwest of The Arabian island during the period (1208-1227 AH/ 1793-1812 AD) where the convoys of Shami Hajj and the convoys of the Egyptian hajj became directly under the authority and administration of the first Saudi state (1175-1223 AH / 1744-1818 AD) , as well as include

Given the recent advances in information technology, speed has become an important requirement in data transmission.In this regard and given that an LED (light emitting diode) can turn on and off for several thousands, even millions, of times per second, then LiFi (light fidelity) technology has strong advantages over WiFi (wireless fidelity) in te

The political direction of Koers, 1933-1961 The journal Koers was founded in 1933 by Afrikaner Calvinists of the Potchefstroom University College for Christian Higher Education.This journal was their main voice for views on political affairs during the period before 1961.This article examines the views of contributors to Koers regarding, inter alia

This paper presents four different studies from the French national research project that deal Table Tops with the fine grinding of hydrargillite.These include pilot plant tests of dry grinding in an air jet mill and wet grinding in a stirred bead mill.Two other more fundamental studies are concerned with determining fragmentation schemes in fine g