Safety enhancement of operator protection systems on self-propelled mining equipment

In the long term, with development of skill, knowledge, exposure and confidence within the engineering profession, rigorous analysis techniques have the potential to become a reliable and far more comprehensive method for design and verification of the structural adequacy of OPS, write Nimal J Perera, David P Thambiratnam and Brian Clark. This paper explores the potential to enhance operator safety of self-propelled mechanical plant subjected to roll over and impact of falling objects using the non-linear and dynamic response simulation capabilities of analytical processes to supplement quasi-static testing methods prescribed in International and Australian Codes of Practice for bolt on Operator Protection Systems (OPS) that are post fitted. The paper is based on research work carried out by the authors at the Queensland University of Technology (QUT) over a period of three years by instrumentation of prototype tests, scale model tests in the laboratory and rigorous analysis using validated Finite Element (FE) Models. The FE codes used were ABAQUS for implicit analysis and LSDYNA for explicit analysis. The rigorous analysis and dynamic simulation technique described in the paper can be used to investigate the structural response due to accident scenarios such as multiple roll over, impact of multiple objects and combinations of such events and thereby enhance the safety and performance of Roll Over and Falling Object Protection Systems (ROPS and FOPS). The analytical techniques are based on sound engineering principles and well established practice for investigation of dynamic impact on all self propelled vehicles. They are used for many other similar applications where experimental techniques are not feasible.

What aspects of rehabilitation provision contribute to self-reported met needs for rehabilitation one year after stroke - amount, place, operator or timing?

BACKGROUND AND OBJECTIVE: To a large extent, people who have suffered a stroke report unmet needs for rehabilitation. The purpose of this study was to explore aspects of rehabilitation provision that potentially contribute to self-reported met needs for rehabilitation 12 months after stroke with consideration also to severity of stroke. METHODS: The participants (n = 173) received care at the stroke units at the Karolinska University Hospital, Sweden. Using a questionnaire, the dependent variable, self-reported met needs for rehabilitation, was collected at 12 months after stroke. The independent variables were four aspects of rehabilitation provision based on data retrieved from registers and structured according to four aspects: amount of rehabilitation, service level (day care rehabilitation, primary care rehabilitation and home-based rehabilitation), operator level (physiotherapist, occupational therapist, speech therapist) and time after stroke onset. Multivariate logistic regression analyses regarding the aspects of rehabilitation were performed for the participants who were divided into three groups based on stroke severity at onset. RESULTS: Participants with moderate/severe stroke who had seen a physiotherapist at least once during each of the 1st, 2nd and 3rd-4th quarters of the first year (OR 8.36, CI 1.40-49.88 P = 0.020) were more likely to report met rehabilitation needs. CONCLUSION: For people with moderate/severe stroke, continuity in rehabilitation (preferably physiotherapy) during the first year after stroke seems to be associated with self-reported met needs for rehabilitation.

Operator and organizational maintenance manual : hammer, pile driver, self-powered, diesel (Koehring model DA35), FSN 3895-443-4696.

"January 1970."

Operator and organizational maintenance manual : drill, pneumatic, drifter, self-propelled, Joy model RAM-MS-5/450A-DR, FSN 3820-445-3766.

"July 1974."

Operator, organizational, direct support and general support maintenance manual : mixer, rotary tiller, DED, 4 wheel pneumatic tired, self-propelled (FWD Corporation model B2-1171) (FSN 3895-883-0437).

Includes index.

Operator's manual, carrier, guided missile equipment, self-propelled : M730 (1450-00-930-8749) and M730A1 (1450-01-121-2122).

Includes index.

Operator's manual : carrier, personnel, full tracked, armored M113A1, 2350-00-968-6321; carrier, command post, light, tracked M577A1, 2350-00-056-6808; carrier, mortar, 107-mm, self-propelled M106A1, 2350-00-076-9002; carrier, mortar ... carrier, flame thrower ....

"August 1978."

Operator's instructions for crane, wheel-mounted, self-propelled for aircraft maintenance and positioning (SCAMP), 4 ton, Grove Manufacturing Company model RT41AA, NSN 3810-01-144-4885.

"20 February 1987."

Operator, organizational, direct and general support, and depot maintenance manual : drill, pneumatic, drifter, boom-type, crawler-mounted, self-propelled (Ingersoll-Rand model CM150A/D475A) FSN 3820-854-4149.

Includes index.

Operator's manual : snow removal unit, self-propelled, gasoline driven, rotary, wheel mtd, winterized (FWD model S-349-V), serial numbers G30681 through G30690 and G30750 through G30759 FSN 3825-810-7074.

"December 1961."

Operator, organizational, direct support, general support, and depot maintenance manual : hammer, pile-driver, self-powered, w/fuel oil tank and lubricating oil tank (Link-Belt Speeder mdl 440) FSN 3895-854-4150.

"December 1968."

Operator, organizational, direct support, general support, and depot maintenance manual : mixer, bituminous material, non-self-loading, diesel engine driven (Barber-Greene model KA-60) FSN 3895-933-0577 with elevator, bucket type ... components of mixing plant, asphalt ....

"April 1968."

Operator, organizational, direct and general support and depot maintenance manual : air conditioner, base-mounted, self-contained lightweight, air-cooled, 38,000 BTU/hr cooling and 35,000 BTU/hr heating capacity, Fairchild Stratos model VEA4-3A, PN 107201 (FSN 4120-926-4280).

Includes index.

Operator's, organizational and direct support maintenance manual : air conditioner, wall or base mounted, self-contained, multi-package, standard weight, air cooled, 6,000 BTU/hr cooling, 4,000 BTU/hr heating, class 1, 115 volt, single phase, 2-wire, 50/60 hertz, model CE-6A-60, Keco model F6000-7, NSN 4120-01-066-9677.

"21 November 1980."

Operator, organizational, direct support, and general support maintenance manual : air conditioner, vertical, compact, self-contained, air cooled, electric motor driven ... (Harvey W. Hottel model CV-6-5/6-15) FSN 4120-455-7673.

Includes index.