Contrast

This thesis will discuss the importance of contrast within a piece of artwork as well as a history and explanation of the other elements and principles of art. It is important for artists to understand the elements and principles to have a good base in creating artwork. This thesis will explore the history of the elements and principles, review other artists using these principles within their artwork as well as the significance of these elements and principles within my own artwork. Through this exploration an artist will be able to understand as well as utilize these elements and principles within their own artwork to create the principle of aesthetic and emotional contrast

Controlled air recirculation consideration for Canadian hard rock mining

Recirculation of air is a widely used technique in general ventilation and air conditioning practise.Interest in the application of controlled recirculation of ventilation air in mines has grown considerably in the last decade. This is evident by the number of controlled recirculation schemes which have been implemented or are being considered or planned in several countries and in different types of mines.A detailed description is given of the operating and proposed schemes in South African gold and U.K. coal mines. This includes safety, dust filtration and blast contaminant removal systems.The monitoring and feasibility methodology required to evaluate controlled recirculation for heat reclamation, and thus cost saving, in Canadian hard rock mines, is then examined.Experimental work pertaining to air quality study, carried out at three mines, is described in detail, and backed up by extensive appendices.The observed deposition of dust and reduction in gaseous pollutants concentration in exhaust shafts are analyzed and depicted in several figures and tables.Simplified theoretical aspects of dust deposition, and statistical analysis of the obtained results, are outlined