utilizing the gathered failure data and failure interval data from tabas coal mine in two years, this paper discusses the reliability of powered supports. the data sets were investigated using statistical procedures and in two levels: the existence of trend and serial correlation. the results show that the powered supports follow the gamma reliability function. the reliability of the machine de...

Utilizing the gathered failure data and failure interval data from Tabas coal mine in two years, this paper discusses the reliability of powered supports. The data sets were investigated using statistical procedures and in two levels: the existence of trend and serial correlation. The results show that the powered supports follow the Gamma reliability function. The reliability of the machine de...

The penetration of converter connected generation is increasing globally, bringing with it valid concerns over the stability modern electricity network. In terms frequency stability, provision inertia and support from interfaced has been topic significant research a wide range systems considered. One resource that avoided attention GB rail electrical rolling stock. Everyday thousands trains run...

Objective: In this study, we aimed to describe the burden of family caregivers providing powered wheelchair-related and overall assistance and test the hypotheses that caregiver burden correlates with participation, wheelchair skills capacity, anxiety, depression, and social support. Methods: Cross-sectional study. Participants included 35 family caregivers of powered wheelchair users. Caregive...

Abstract The powered roof support is one of the essential elements technical equipment longwall. It responsible for safety machines and workers. In addition, its function to move entire wall complex along operational progress combine. Choosing proper per conditions prevailing in an important factor safe effective operation. aim study was assess mining geological Polish hard coal mines terms ope...