Recent years have seen the widespread use of a new gob-side entry retaining technology, namely, automatic roadway forming based on roof cutting and pressure relief.However, because of the complex geological conditions, stability control methods for the surrounding rock remain unexplored.In this paper, through theoretical analysis, field measurement
The high unemployment rates among Moroccan university graduates Vision Health and their strong demand for public sector jobs have prompted educational authorities to promote entrepreneurship training in higher education.This study aims to investigate the relationship between four variables related to entrepreneurship (perceived effectiveness of ent
One of the factors that can affect to the quality of lubricantion is metal particle content due to friction of engine parts.Metal particle in lubricanting oil could damage the engine parts, so it Supplement is neccessary to reduce the metal particle content which mingled in lubricant oil.The experiment was conducted in laboratory scale using power