scholarly journals New Technology Demonstration Program - Results of an Attempted Field Test of Multi-Layer Light Polarizing Panels in an Office Space

2001 ◽  
Author(s):  
Eric E. Richman
Keyword(s):  
Field Test ◽  
New Technology ◽  
Demonstration Program ◽  
Office Space ◽  
Technology Demonstration

scholarly journals Directional presplit blasting in an innovative no-pillar mining approach

2019 ◽  
Vol 16 (5) ◽  
pp. 875-893 ◽  
Author(s):  
Jinzhu Hu ◽  
Xingyu Zhang ◽  
Yubing Gao ◽  
Zimin Ma ◽  
Xinzeng Xu ◽  
...  
Keyword(s):  
Crack Initiation ◽  
Field Test ◽  
Concentration Factor ◽  
New Technology ◽  
Simulation Method ◽  
Explosion Pressure ◽  
Element Simulation ◽  
Pillar Mining ◽  
The Relationship ◽  
Presplit Blasting

Abstract Directional presplit blasting (DPB) technology for an innovative no-pillar mining approach is introduced. First, a mechanical model is established to analyze crack initiation and coalescence using the new technology. The explosion pressure formula containing tress concentration factor explains the relationship between the quantity of explosives and the crack initiation and coalescence. Subsequently, a dynamic finite element simulation method is used to study the stress and damage evolution process of the blasthole wall in ordinary explosion and DPB. The simulation results indicate that the stress concentration factor is approximately 4c10 for the same quantity of explosives. Finally, a field test was conducted in the Fucheng coal mine of China. Based on the field test, the concept of cracking ability is proposed, the relationship between the quantity of explosives and cracking ability is determined, and the quantity of explosives is divided into four stages that are compatible with the roof rock strength. The results can provide some clinical guidance for application of DPB in other projects of the gob-side entry retaining by roof cutting.

A photovoltaic stand-alone lighting system with polymeric-silica-gel-electrolyte-based substrate-integrated lead-carbon hybrid ultracapacitors

2015 ◽  
Vol 1 (1) ◽  
Author(s):  
A. Banerjee ◽  
S. K. Ramasesha ◽  
A. K. Shukla
Keyword(s):  
Silica Gel ◽  
Field Test ◽  
New Technology ◽  
Gel Electrolyte ◽  
Premature Failure ◽  
Photovoltaic Panel ◽  
Lead Acid Batteries ◽  
Solar Electricity ◽  
Lighting Application ◽  
Lead Acid

AbstractHarnessing solar electricity generated through photovoltaic cells with lead-acid batteries remains the most compelling option at present. But lead-acid batteries have encountered problems in photovoltaic installations, mainly due to their premature failure. To circumvent the aforesaid problem, a new technology referred to as substrate-integrated lead-carbon hybrid ultracapacitor with polymeric-silica-gel electrolyte, is developed inhouse and tested for solar-electricity storage for a lighting application. The high-throughput performance tests for the device are conducted at laboratory scale and compatibility of the device for photovoltaic application is evaluated. In doing so, the device is installed with a photovoltaic panel for field test and data are collected from August 2012 through July 2013. The year round field-test data analyzed in the light of the available global-horizontalirradiance data show attractive performance for the device. It is noteworthy that, unlike lead-acid batteries, seasonal variations in solar radiance exhibit little effect on the performance of the device.

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