A. J. R. Atkin, Department of Mines, P.O.B. 6231, Johannesburg, South Africa

Pillar Design in the Hard Rock Mines of South Africa

This paper gives an overview of the difficulties associated with the design of hard rock pillars in South African mines. Recent examples of large scale pillar collapses in South Africa suggest that these were caused by weak partings which traversed the pillars. Currently two different methods are used to determine the strength of pillars, namely, empirical equations derived from back analyses o...

HIV-Associated Disseminated Emmonsiosis, Johannesburg, South Africa

Technical Appendix Table 1. Laboratory results at admission for 3 patients with HIV-associated disseminated emmonsiosis, Johannesburg, South Africa* Laboratory investigation Case 1 Case 2 Case 3 Reference range CD4 count 5 cells/μL 3 cells/μL 0 cells/μL 50–2010 cells/μL Leukocyte count 16.91 × 10/L 1.52 ×1 0/L 1.84 × 10/L 4.00–10.00 × 10/L Hemoglobin 8.7 g/dL 11.7 g/dL 7.8 g/dL 14.3–18.3 g/dL M...

City Development Strategy in Johannesburg, South Africa

Johannesburg, South Africa Background to CDS Process of CDS Outcome • Population 3.5 million, 12% of nation GDP in the city, 30% below poverty line, stagnant economy, unemployment rising to almost 30% • Transformation of civic structure, from a single municipality, now the greater Johannesburg municipality with executive powers for the Mayor • CDS process begun as a part of strategic planning p...

Pneumonic Plague in Johannesburg, South Africa, 1904

Epidemic spread of multidrug-resistant tuberculosis in Johannesburg, South Africa.

Numerous reports have documented isolated transmission events or clonal outbreaks of multidrug-resistant Mycobacterium tuberculosis strains, but knowledge of their epidemic spread remains limited. In this study, we evaluated drug resistance, strain diversity, and clustering rates in patients diagnosed with multidrug-resistant (MDR) tuberculosis (TB) at the National Health Laboratory Service (NH...