Progress toward the development of an electromagnetic pulse sounding probe for the detection and delineation of geological anomalies, primarily in a hard rock medium, is reported. This report covers research performed on Contract H0210042 during the period 24 February 1971 to 23 February 1972. Analytical studies on design data for the probe and on the scattering by planar and spherical contrast...

Drilling samples of lunar soil is an important and indispensable part of China’s lunar exploration project. The drill bit temperature during the drilling process is one of the key concerns for scholars, especially for the hard lunar rock drilling in vacuum. In this article, the simulation analysis of drilling in atmosphere and vacuum is conducted. Moreover, a fiber grating temperature measuring...

This paper focuses on the issues pertaining to the introduction of mechanization in an underground narrow reef hard rock mine typified by, but not solely restricted to, platinum mining in South Africa. In the context of this paper, mechanization refers to any machine, process or activity that reduces the human effort required to break or move rock or material in a mine. The following mechanizat...

This research embodies the design, construction and simulation of a feeder pillar (415VAC) with over-current, overload and earth-fault protection with the aid of a phase sequence relay, contactor, earth-leakage circuit breaker and three-phase overload relay. The analog voltmeters in the various bus-bars (red, yellow and blue phases) in a conventional feeder pillar is replaced with a digital pan...

PURPOSE To evaluate the use of pars plana needle aspiration of retrolenticular fluid in the immediate management of an acute intraoperative rock-hard eye syndrome (AIRES). SETTING Private practice, Sydney, Australia. DESIGN Retrospective case series. METHODS Data over an 18-month period were collected to evaluate efficacy, complications, and visual outcomes in patients who had pars plana ...