scholarly journals A New Level Measurement System of Settlement at Airports Using RTK-GPS and Laser Level.

1999 ◽  
pp. 55-64
Author(s):  
Bunji SHIGEMATSU ◽  
Hitoshi NOGUCHI ◽  
Eihan SHIMIZU
Keyword(s):  
Measurement System ◽  
Laser Level ◽  
Level Measurement ◽  
Rtk Gps

Growth Kinetics and Thermal Stress in AlN Bulk Crystal Growth

2002 ◽  
Author(s):  
Bei Wu ◽  
Ronghui Ma ◽  
Hui Zhang ◽  
Michael Dudley ◽  
Raoul Schlesser ◽  
...  
Keyword(s):  
Thermal Stress ◽  
Crystal Growth ◽  
Temperature Distribution ◽  
Stress Level ◽  
Grown Crystal ◽  
Power Level ◽  
Chemical Species ◽  
Group Iii Nitrides ◽  
Minor Effect ◽  
Group Iii

Group III nitrides, such as GaN, AlN and InGaN, have attracted a lot of attention due to the development of blue-green and ultraviolet light emitting diodes (LEDs) and lasers. In this paper, an integrated model has developed based on the conservation of momentum, mass, chemical species and energy together with necessary boundary conditions that account for heterogeneous chemical reactions both at the source and seed surfaces. The simulation results have been compared with temperature measurements for different power levels and flow rates in a reactor specially designed for nitride crystal growth at NCSU. It is evident that the heat power level affects the entire temperature distribution greatly while the flow rate has minor effect on the temperature distribution. The results also show that the overall thermal stress level is higher than the critical resolved shear stress, which means thermal elastic stress can be a major source of dislocation density in the as-grown crystal. The stress level is strongly dependent on the temperature gradient in the as-grown crystal. Results are correlated well with defects showing in an X-ray topograph for the AlN wafer.

scholarly journals Prototipe Perangkat untuk Pemantauan dan Pengendalian Berbasis Web Diiintegrasikan ke Smarthome System

2020 ◽  
Vol 10 (2) ◽  
pp. 167
Author(s):  
Achmad Faris Nasyarudin ◽  
Ritzkal Ritzkal ◽  
Arief Goeritno
Keyword(s):  
Performance Measurement ◽  
Water Level ◽  
Measurement System ◽  
Electronic Devices ◽  
Water Tank ◽  
Monitoring And Control ◽  
Validation Test ◽  
Level Measurement ◽  
And Performance ◽  
And Control

 The design and construction of a device prototype for a water level measurement system in a tank and controlling a number of garden light analogies has been carried-out and the prototype can be integrated into smarthome system. Three topics are discussed in this paper, including the manufacture, programming, and performance measurement of device prototypes. The formation of prototype of the device is done through wiring integration between electronic devices, in order to obtain the hardware handshacking. Programming the prototype of device is done through the creation of algorithms and preparation of syntax, in order to obtain the software handshacking. The performance of the prototype of device is measured when integrated into the Smarthome system, in order to obtain the hardware and software handshacking. The performance of prototype of the device when monitoring in the form of information about the water level in the water tank with 3 (three) conditions, namely the criteria of "empty", "medium", and "full", while the control in the form of information about the operation of ON/OFF of the LED as an analogy to the lamp garden are done for 3 (three) positions, namely position #1, #2, and #3. The manufactured subsystem prototype can be integrated into the smarthome system when a validation test is performed. Prototype of the device for monitoring and control based-on web that can be integrated into the smarthome system.

scholarly journals BATH LEVEL MEASUREMENT SYSTEM IMPROVES EAF MELTING PROCESS CONTROL

2014 ◽  
Author(s):  
Patrik Bloemer ◽  
Jan-Peter Nilsson ◽  
Anthony Lyons ◽  
Christer Carlsson ◽  
Ivo Filipovic ◽  
...  
Keyword(s):  
Process Control ◽  
Measurement System ◽  
Melting Process ◽  
Level Measurement
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