Grinding iron ores in conventional ball mills involve a considerably high consumption of metallic media, resulting operating costs. In the case compact itabirites, silica content increases such consumption, potentially exceeding costs associated with electric power industrial operations. This paper presents research conducted to assess use itabirite samples obtained from an crushing plant as gr...

Highly reflective magnetic powders have been available commercially for latent fingerprint development on dark background surfaces for a few years, however there are needs of a superior darker variety of the magnetic powder which would be ideally suitable for obtaining good contrast on light background surfaces. A novel dark magnetic powder is therefore suggested for the application in latent f...

The amount of energy that can be gained from the wind is unlimited, unlike current energy sources such as fossil and coal. While there is an important push in the use of wind energy, gears and bearing components of the turbines often fail due to contact fatigue, causing costly repairs and downtime. The objective of this work is to investigate the potential tribological benefits of two phosphoni...

j This is one of the 11 Masters of Medicine" series, the introductory volume of which we reviewed in March. Everything as been done to make the record of the life of this truly great ^>an as complete as possible ; and although the material at the author's disposal was somewhat scanty, yet we have a consecutive and very readable biography supplemented by wellhosen extracts from Harvey's works. T...

We establish a new homological lower bound for the Thurston norm on 1-cohomology of 3-manifolds. This generalizes previous results of C. McMullen, S. Harvey, and the author. We also establish an analogous lower bound for 1-cohomology of 2-dimensional CW-complexes. AMS Classification 57M27, 57M20, 57M05

This book constitutes an impassioned plea for providing substitute family life for deprived young children. It has the backing of Miss Balls' experience in the Northumberland Children's Department, where she was able to promote a policy of closing nurseries and enlisting the help of foster parents. The question arises whether her championship of the deprived child, illustrated by selective mate...

Cold helical rolling (CHR) is one of the most effective ways to produce small-diameter steel balls. In this study, kind work hardening model was established and implemented into Simufact 15.0 investigate phenomenon in cold forming process. Firstly, based on theory, a set finite element (FE) simulations developed. The influence CHR parameters, including starting height convex rib, area length, i...