In-situ multiple wavelength ellipsometry for real time process characterization of nitride MOCVD

2005 ◽  
Author(s):  
A. Bonanni
Keyword(s):  
Real Time ◽  
Time Process ◽  
Process Characterization ◽  
Multiple Wavelength

Real-Time Process Characterization of Open Die Forging for Adaptive Control

2000 ◽  
Author(s):  
T. J. Nye ◽  
A. M. Elbadan ◽  
G. M. Bone
Keyword(s):  
Adaptive Control ◽  
Real Time ◽  
Program Control ◽  
Time Process ◽  
Forming Process ◽  
Plastic Deformations ◽  
Die Forging ◽  
Process Characterization ◽  
Open Die Forging

Abstract Open die forging is a process in which products are made through repeated, incremental plastic deformations of a workpiece. Typically, the workpiece is held by a manipulator, which can position the workpiece through program control between the dies of a press. The part programs are generated with an empirically derived parameter, called the spread coefficient, whose value is subject to some contention. In this work, we demonstrate how process information can be used in real time to derive the actual spread coefficient for a given workpiece as it is being formed. These measurements and calculations occur in real time, and can be used to regenerate part programs to optimize the forming process, or can be used to adaptively control each incremental deformation of the workpiece.

Real-Time Process Characterization of Open Die Forging for Adaptive Control

2000 ◽  
Vol 123 (4) ◽  
pp. 511-516 ◽  
Author(s):  
T. J. Nye ◽  
A. M. Elbadan ◽  
G. M. Bone
Keyword(s):  
Adaptive Control ◽  
Real Time ◽  
Program Control ◽  
Time Process ◽  
Forming Process ◽  
Plastic Deformations ◽  
Die Forging ◽  
Process Characterization ◽  
Open Die Forging

Open die forging is a process in which products are made through repeated, incremental plastic deformations of a workpiece. Typically, the workpiece is held by a manipulator, which can position the workpiece through program control between the dies of a press. The part programs are generated with an empirically derived parameter, called the spread coefficient, whose value is subject to some contention. In this work, we demonstrate how process information can be used in real time to derive the actual spread coefficient for a given workpiece as it is being formed. These measurements and calculations occur in real time, and can be used to regenerate part programs to optimize the forming process, or can be used to adaptively control each incremental deformation of the workpiece.

scholarly journals Assembly of Conducting Polymer and Biohydrogel for the Release and Real-Time Monitoring of Vitamin K3

Gels ◽  
2018 ◽  
Vol 4 (4) ◽  
pp. 86 ◽  
Author(s):  
Brenda Molina ◽  
Eva Domínguez ◽  
Elaine Armelin ◽  
Carlos Alemán
Keyword(s):  
Real Time ◽  
Differential Pulse ◽  
Integrated System ◽  
Dual Function ◽  
Therapeutic Approaches ◽  
Vitamin K3 ◽  
Flexible Electrode ◽  
Anodic Synthesis

In this work, we report the design and fabrication of a dual-function integrated system to monitor, in real time, the release of previously loaded 2-methyl-1,4-naphthoquinone (MeNQ), also named vitamin K3. The newly developed system consists of poly(3,4-ethylenedioxythiophene) (PEDOT) nanoparticles, which were embedded into a poly-γ-glutamic acid (γ-PGA) biohydrogel during the gelling reaction between the biopolymer chains and the cross-linker, cystamine. After this, agglomerates of PEDOT nanoparticles homogeneously dispersed inside the biohydrogel were used as polymerization nuclei for the in situ anodic synthesis of poly(hydroxymethyl-3,4-ethylenedioxythiophene) in aqueous solution. After characterization of the resulting flexible electrode composites, their ability to load and release MeNQ was proven and monitored. Specifically, loaded MeNQ molecules, which organized in shells around PEDOT nanoparticles agglomerates when the drug was simply added to the initial gelling solution, were progressively released to a physiological medium. The latter process was successfully monitored using an electrode composite through differential pulse voltammetry. The fabrication of electroactive flexible biohydrogels for real-time release monitoring opens new opportunities for theranostic therapeutic approaches.

In-Situ Real-Time Characterization of Particulate Emissions from a Diesel Engine Exhaust by Laser-Induced Incandescence

2000 ◽  
Author(s):  
David R. Snelling ◽  
Gregory J. Smallwood ◽  
Robert A. Sawchuk ◽  
W. Stuart Neill ◽  
Daniel Gareau ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Real Time ◽  
Particulate Emissions ◽  
Engine Exhaust ◽  
Diesel Engine Exhaust ◽  
Laser Induced Incandescence
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