scholarly journals A Closed-Loop Method for Bio-Impedance Measurement with Application to Four and Two-Electrode Sensor Systems

10.5772/7615 ◽  
2010 ◽  
Author(s):  
Alberto Yufera ◽  
Adoracion Rue
Keyword(s):  
Closed Loop ◽  
Impedance Measurement ◽  
Sensor Systems ◽  
Loop Method ◽  
Electrode Sensor

scholarly journals Forward kinematic analysis of Dobot using closed-loop method

2020 ◽  
Vol 9 (3) ◽  
pp. 153
Author(s):  
Javier Dario Sanjuan De Caro ◽  
Mohammad Rahman ◽  
Ivan Rulik
Keyword(s):  
Analytical Solution ◽  
Kinematic Analysis ◽  
Closed Loop ◽  
Dynamical Model ◽  
Forward Kinematics ◽  
Loop Method ◽  
Serial Robots ◽  
Forward Kinematic

Dobot is a hybrid robot that combines features from parallel and serial robots. Because of this characteristic, the robot excels for is reliability, allowing its implementation in diverse applications. Therefore, researchers have studied its kinematics to improve its capabilities. However, to the extent of our knowledge, no analysis has been reported taking into consideration the closed-loop configuration of Dobot. Thus, this article presents the complete analytical solution for the forward kinematics of Dobot, considering each link. The results are expected to be utilized in the development of a dynamical model that contemplates the dynamics of each element of the robot.

Effect of position of radial air injection plane on control of thermo-acoustic instability using active closed-loop method

2021 ◽  
pp. 107754632110501
Author(s):  
Nilaj N Deshmukh ◽  
Afzal Ansari ◽  
Praseed Kumar ◽  
Allen V George ◽  
Febin J Thomas ◽  
...  
Keyword(s):  
Gas Turbines ◽  
Structural Damage ◽  
Closed Loop ◽  
Control Method ◽  
Heat Waves ◽  
Air Injection ◽  
Rocket Engines ◽  
Acoustic Instability ◽  
Loop Method ◽  
Short Time

Thermo-acoustic instability occurs when self-excited oscillations are generated due to the coupling between unsteady heat release and acoustics. This phenomenon can result in an increased rate of vibration, structural damage, and produces unwanted emissions. Thermo-acoustic instability occurs in rocket engines, gas turbines, combustors, and furnaces. When thermo-acoustic instability occurs, many modes are developed naturally at a specific point. Some waves are unstable and some are stable. So, to study this phenomenon the most unstable waves are considered and a technique is developed to suppress these unstable waves. A radial air injector as a closed-loop active control method is used for breaking the coupling between the heat waves and acoustics inside the 1D combustion chamber. The distance between the burner and the air injector is varied for the fixed position of the burner with respect to the Rijke tube, that is, x/L = 0.01125, 0.0075, and 0.00375. This closed-loop method works based on the feedback acquired from a microphone. The control method is built using DAQ and Arduino with the LabVIEW as interface for Arduino (LIFA). An air flow rate controller setup is developed to control and measure air required for suppressing the thermo-acoustic instability. Thermo-acoustic instability is effectively suppressed with the help of radial injection in the form of micro-jets at the downstream of the burner as the closed-loop controlling method. It is concluded that when the radial micro-jet air injection plane is closer to the burner head, the thermo-acoustic instability gets suppressed in a short time and with a lesser quantity of air.

scholarly journals Mechanistic Studies on the Absorption-Enhancing Effects of Gemini Surfactant on the Intestinal Absorption of Poorly Absorbed Hydrophilic Drugs in Rats

Pharmaceutics ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 170 ◽  
Author(s):  
Tammam Alama ◽  
Kosuke Kusamori ◽  
Masaki Morishita ◽  
Hidemasa Katsumi ◽  
Toshiyasu Sakane ◽  
...  
Keyword(s):  
Intestinal Absorption ◽  
Gemini Surfactant ◽  
Closed Loop ◽  
Intestinal Cell ◽  
Mechanistic Studies ◽  
High Potency ◽  
Absorption Enhancers ◽  
Hydrophilic Drugs ◽  
Loop Method

Generally, the use of absorption enhancers might be the most effective approaches to ameliorate the enteric absorption of poorly absorbed substances. Among numerous absorption enhancers, we already reported that a gemini surfactant, sodium dilauramidoglutamide lysine (SLG-30) with two hydrophobic and two hydrophilic moieties, is a novel and promising adjuvant with a high potency in improving the absorption safely. Here, we examined and elucidated the absorption-improving mechanisms of SLG-30 in the enteric absorption of substances. SLG-30 increased the intestinal absorption of 5(6)-carboxyfluorescein (CF) to a greater level than the typical absorption enhancers, including sodium glycocholate and sodium laurate, as evaluated by an in situ closed-loop method. Furthermore, SLG-30 significantly lowered the fluorescence anisotropy of dansyl chloride (DNS-Cl), suggesting that it might increase the fluidity of protein sections in the intestinal cell membranes. Moreover, SLG-30 significantly lowered the transepithelial-electrical resistance (TEER) values of Caco-2 cells, suggesting that it might open the tight junctions (TJs) between the enteric epithelial cells. Additionally, the levels of claudin-1 and claudin-4 expression decreased in the presence of SLG-30. These outcomes propose that SLG-30 might improve the enteric transport of poorly absorbed substances through both transcellular and paracellular routes.

Modeling of Transfer Impedance in Automotive BCI Test System with Closed-Loop Method

2020 ◽  
Vol E103.B (4) ◽  
pp. 405-414
Author(s):  
Junesang LEE ◽  
Hosang LEE ◽  
Jungrae HA ◽  
Minho KIM ◽  
Sangwon YUN ◽  
...  
Keyword(s):  
Closed Loop ◽  
Test System ◽  
Transfer Impedance ◽  
Loop Method

A Closed Loop Method for Vehicle Instrument Cluster Test Automation

2019 ◽  
Author(s):  
Gayatri Sindhu G ◽  
Arunkumar Ramu ◽  
Raghuram Shastry
Keyword(s):  
Closed Loop ◽  
Test Automation ◽  
Instrument Cluster ◽  
Loop Method

A System for Clearance Measurement of Bearings before and after Assembling

2017 ◽  
Vol 870 ◽  
pp. 179-184 ◽  
Author(s):  
Nicolas Meier ◽  
Anthimos Georgiadis
Keyword(s):  
Closed Loop ◽  
Test Method ◽  
Radial Clearance ◽  
Ball Bearings ◽  
Loop Method ◽  
Different Types ◽  
Before And After ◽  
Different Dimensions ◽  
Manual Test

In this work, a method for measuring the radial clearance of bearings mounted on a shaft before and after assembling in an automatically and standardized way will be described. A setup was constructed, which enables to measure the radial clearance of different types of bearings with different dimensions. Tests with roller and ball bearings with tapered bore and adapter sleeves show that the developed system provides as good or better results than the manual test method. The results are reliable, objective, independent from the user and reproducible. Based on the results, the process of assembling could be readjusted. By using a closed loop method, it will be achieved that bearings will be mounted on a shaft with the specified radial clearance which is defined by the manufacturer of the bearing.

A new closed loop method of super-resolution for multi-view images

2013 ◽  
Vol 25 (7) ◽  
pp. 1685-1695 ◽  
Author(s):  
Jing Zhang ◽  
Yang Cao ◽  
Zhigang Zheng ◽  
Changwen Chen ◽  
Zengfu Wang
Keyword(s):  
Closed Loop ◽  
Super Resolution ◽  
Loop Method
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