Ultra-Wideband Fast Acquisition System for Positioning in an Underground Mining Environment

2008 ◽  
Author(s):  
Y. Salih-Alj ◽  
C. Despins ◽  
S. Affes
Keyword(s):  
Underground Mining ◽  
Ultra Wideband ◽  
Acquisition System ◽  
Fast Acquisition ◽  
Mining Environment

MEASUREMENT OF THE EQUILIBRIUM FACTOR BETWEEN RADON AND ITS PROGENY IN THE UNDERGROUND MINING ENVIRONMENT

2004 ◽  
Vol 86 (4) ◽  
pp. 374-377 ◽  
Author(s):  
O. M. Ntwaeaborwa ◽  
N. D. Kgwadi ◽  
S. H. Taole ◽  
R. Strydom
Keyword(s):  
Underground Mining ◽  
Equilibrium Factor ◽  
Mining Environment

scholarly journals Experimental Characterization of Ultra-Wideband Channel Parameter Measurements in an Underground Mine

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
B. Nkakanou ◽  
G. Y. Delisle ◽  
N. Hakem
Keyword(s):  
Underground Mining ◽  
Path Loss ◽  
Measurement Procedure ◽  
Ultra Wideband ◽  
Small Scale ◽  
Scale Parameters ◽  
Channel Parameter ◽  
Channel Parameters ◽  
Uwb Channel

Experimental results for an ultra-wideband (UWB) channel parameters in an underground mining environment over a frequency range of 3 GHz to 10 GHz are reported. The measurements were taken both in LOS and NLOS cases in two different size mine galleries. In the NLOS case, results were acquired for different corridor obstruction angles. The results were obtained during an extensive measurement campaign in the UWB frequency, and the measurement procedure allows both the large- and small-scale parameters such as the path loss exponent, coherence bandwidth, and so forth, to be quantified. The capacity of the UWB channel as a function of the physical depth of the mine gallery has also been recorded for comparison purposes.

scholarly journals The medical perspective on mining incidents

2019 ◽  
Vol 8 (3) ◽  
pp. 236-246 ◽  
Author(s):  
Sofia Karlsson ◽  
Britt-Inger Saveman ◽  
Lina Gyllencreutz
Keyword(s):  
Underground Mining ◽  
Qualitative Content Analysis ◽  
Prehospital Care ◽  
Extreme Environment ◽  
Structured Interview ◽  
Underground Mines ◽  
Major Incident ◽  
Content Type ◽  
Rescue Service ◽  
Mining Environment

Purpose The purpose of this paper is to examine emergency medical service (EMS) personnel’s perceptions and experiences of managing underground mining injury incidents. Design/methodology/approach In total, 13 EMS personnel were interviewed according to a semi-structured interview guide. The interviews were transcribed verbatim and analyzed using qualitative content analysis. Findings An underground mining environment was described as unfamiliar and unsafe and, with no guidelines for operational actions in an extreme environment, such as underground mines, the EMS personnel were uncertain of their role. They therefore became passive and relied on the rescue service and mining company during a major incident. However, the medical care was not considered to be different from any other prehospital care, although a mining environment would make the situation more difficult and it would take longer for the mine workers to be placed under definitive care. Originality/value This study complements earlier studies by examining the EMS personnel’s perceptions and experiences of major incidents.

A Fast Acquisition System for Large-Scale Optical Microscopic Integrated Circuit Chip Images Based on Thin Plate Spline

2013 ◽  
Vol 303-306 ◽  
pp. 1629-1634
Author(s):  
Xu Zhang ◽  
Xi Chen ◽  
Li Xin Wei ◽  
Hong Tu Ma ◽  
Hua Han
Keyword(s):  
Thin Plate ◽  
Integrated Circuit ◽  
Large Scale ◽  
Surface Fitting ◽  
Optical Microscope ◽  
Thin Plate Spline ◽  
Acquisition System ◽  
Acquisition Time ◽  
Fast Acquisition ◽  
Auto Focusing

When large-scale images acquisition conducted on an Integrated Circuit (IC) chip by using an optical microscope, multi-layer routing structure and transparent inter-layer dielectric of IC chips can interfere with auto-focusing of an optical microscope, which significantly increases the images’ acquisition time. To solve the forementioned problems, a fast acquisition system is proposed based on surface fitting. First of all, we obtain focus plane height of multiple scattered points through pre-acquisition. Then, the surface fitting method, with Thin Plate Spline (TPS) model is applied, to get the height of the rest points. Thus the system can acquire correct surface-layer images of an IC chip without background interference. The experimental results suggest that the proposed technology is highly superior to manual acquisition system and auto-focusing based acquisition system in acquisition accuracy and speed, and it also decreases the amount of manual workload by 70%-80%.

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