Field evaluation of permeability of concrete linings and rock masses around underground lined rock caverns by a novel in-situ measurement system

2012 ◽  
Vol 137-138 ◽  
pp. 97-106 ◽  
Author(s):  
Hyung-Mok Kim ◽  
Yanick Lettry ◽  
Dohyun Park ◽  
Dong-Woo Ryu ◽  
Byung-Hee Choi ◽  
...  
Keyword(s):  
Measurement System ◽  
Field Evaluation ◽  
In Situ Measurement ◽  
Rock Masses

In-situ electrical probing of zones of nanoindentation-induced phases of silicon

2008 ◽  
Vol 1146 ◽  
Author(s):  
Simon Ruffell ◽  
Jodie Bradby ◽  
Jim Williams ◽  
Ryan Major ◽  
Oden Warren
Keyword(s):  
High Pressure ◽  
Amorphous Silicon ◽  
Measurement System ◽  
In Situ Measurement ◽  
High Pressure Phase ◽  
Crystalline Phases ◽  
Early Portion ◽  
Two Phases ◽  
Pressure Phase

AbstractPhase transformed zones of silicon have been formed by nanoindentation both at the micro- and nanoscale and electrically probed using an in-situ measurement system. Zones composed of the high pressure crystalline phases (Si-III/Si-XII) have higher conductivity than those of amorphous silicon (a-Si). At the microscale probing laterally across the surface shows that the conductivity varies within the zones composed of the high pressure phases. The sensitivity to the different conductivities of the two phases allows mapping within the zones. Finally, at the nanoscale the conductivity of the high pressure phase zones can be correlated with the position of the pop-out associated with the formation of the phases. The zones have higher conductivity when the pop-out occurs earlier on unloading and we suggest that this is due to the reduction in trace volumes of a-Si formed during the early portion of the unloading cycle.

scholarly journals An In Situ Measurement System for Characterizing Orbital Debris

2016 ◽  
Vol 65 (12) ◽  
pp. 2758-2772 ◽  
Author(s):  
Michael A. Tsao ◽  
Hau T. Ngo ◽  
Robert D. Corsaro ◽  
Christopher R. Anderson
Keyword(s):  
Measurement System ◽  
Orbital Debris ◽  
In Situ Measurement

Development of a deep-sea multi-mode acoustic sediments in situ measurement system

2016 ◽  
Author(s):  
Jiuyi Yuan ◽  
Haibin Yu ◽  
Haiyu Yan ◽  
Li Xu ◽  
Guanbao Li
Keyword(s):  
Measurement System ◽  
Deep Sea ◽  
In Situ Measurement ◽  
Multi Mode

scholarly journals Development of Micro-EDM Incorporating In-situ Measurement System

2014 ◽  
Vol 5 ◽  
pp. 1897-1905 ◽  
Author(s):  
T.R. Venugopal ◽  
Muralidhara ◽  
Rathnamala Rao
Keyword(s):  
Measurement System ◽  
In Situ Measurement ◽  
Micro Edm

Development of Tool Based Micromilling/Microdrilling Machine with Piezoactuated Workpiece Feeding System

2014 ◽  
Vol 592-594 ◽  
pp. 164-169 ◽  
Author(s):  
R. K. Veeresha ◽  
Muralidhara ◽  
Rathnamala Rao
Keyword(s):  
Measurement System ◽  
High Speed ◽  
Cooling System ◽  
Detection System ◽  
Device Fabrication ◽  
In Situ Measurement ◽  
Feeding System ◽  
Drilling Tool ◽  
Mechanical Micromachining

Tool based mechanical micromachining technology is gaining importance in MEMS device fabrication because of its ability to machine 3D micro features on different engineering materials. This paper presents the development of tool based mechanical micromachining center with piezoactuated workpiece feeding system. A high speed spindle is used to rotate the micromilling/drilling tool at a speed of 12,000 to 60,000 rpm. A thermoelectric based liquid cooling system is developed to control the temperature of the high speed spindle at a set value. Along with the X-Y positioning system, the workpiece is also mounted on a piezoactuator to provide Z-axis motion during machining operation. An electrical continuity based tool-workpiece contact detection system is developed to overcome premature tool failure during initial tool registration with the workpiece. Based on the developed tool-workpiece contact sensor, an in-situ measurement system is developed to measure the micromachining depth. Experiments were conducted to measure the performance of spindle cooling system and in-situ measurement system.

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