Abstract The mining industry needs a low-cost and reliable breakage characterization test which can rapidly process large number of samples for geometallurgical modelling. more are tested, the better is understanding ore hardness variability lower design or production risks. proposed solution new testing device, herein named Geopyora, variation roll crusher with an adjustable gap instrumentatio...

Purpose is to improve analytical technique calculate strength of cylindrical rock samples taking into consideration standard horizontal stresses. Methods. Mathematical modeling sample breakage under the truncated-wedge destruction was performed stresses using four experimental characteristics (i.e. k being shear strength; f? and ? contact internal friction coefficients; ? elasticity modulus) as...

The use of intramedullary nails to treat trochanteric fractures of the femur has increased with the increasing size of the elderly population. The third generation Gamma nail is currently one of the most popular devices for the treatment of trochanteric fractures. Nail breakage is a rare complication, possibly resulting from fatigue fracture of the implant. We present the first reported case of...

The aim of this cross sectional study was to investigate the prevalence of bracket breakage and bond failure amongst orthodontic patients. One hundred and eighty nine patients (78 male & 111 female) undergoing fixed orthodontic treatment at the Department of Orthodontics at Khyber College of Dentistry were included in the study. The patients were divided into two groups namely teens (ages 13-19...

The esperamicins represent a class of antitumor antibiotics characterized by an unusual chemical core structure and extremely potent cytotoxicity. The mechanism by which these drugs produce cytotoxicity was investigated and found to be related to the formation of single- and double-strand DNA breaks. Using five structurally related analogs, we defined a structure-activity relationship for cytot...

The effective planning for the renewal of water distribution systems requires accurate quantification of the structural deterioration of water mains. Direct inspection of all water mains in a distribution system is almost always prohibitively expensive. Identifying water main breakage patterns over time is an effective and inexpensive alternative to gauge the structural deterioration of a water...

Winter ice storms frequently occur in the southeastern United States and can severely damage softwood plantations. In January 2004, a severe storm deposited approximately 2 cm of ice on an intensively managed 4-year-old loblolly pine (Pinus taeda L.) plantation in South Carolina. Existing irrigation and fertilization treatments presented an opportunity to examine the effects of resource amendme...

Future climates are likely to include extreme events, which in turn have great impacts on ecological systems. In this study, we investigated possible effects that could mitigate stem breakage caused by a rare and extreme ice storm in a Chinese subtropical forest across a gradient of forest diversity. We used Bayesian modeling to correct stem breakage for tree size and variance components analys...