Improved loss determination for planar integrated power passive modules

2003 ◽  
Author(s):  
J.T. Strydom ◽  
J.D. van Wyk
Keyword(s):  
Loss Determination

scholarly journals Tin Complexes Containing an Atenolol Moiety as Photostabilizers for Poly(Vinyl Chloride)

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2923
Author(s):  
Baneen Salam ◽  
Gamal A. El-Hiti ◽  
Muna Bufaroosha ◽  
Dina S. Ahmed ◽  
Ahmed Ahmed ◽  
...  
Keyword(s):  
Weight Loss ◽  
Infrared Spectroscopy ◽  
Surface Morphology ◽  
Vinyl Chloride ◽  
Poly Vinyl Chloride ◽  
Phenyl Rings ◽  
Tin Complexes ◽  
High Yields ◽  
Loss Determination ◽  
Surface Changes

The lifetime of poly(vinyl chloride) (PVC) can be increased through the addition of additives to provide protection against irradiation. Therefore, several new tin complexes containing atenolol moieties were synthesized and their photostabilizing effect on PVC was investigated. Reacting atenolol with a number of tin reagents in boiling methanol provided high yields of tin complexes. PVC was then mixed with the tin complexes at a low concentration, producing polymeric thins films. The films were irradiated with ultraviolet light and the resulting damage was assessed using different analytical and surface morphology techniques. Infrared spectroscopy and weight loss determination indicated that the films incorporating tin complexes incurred less damage and less surface changes compared to the blank film. In particular, the triphenyltin complex was very effective in enhancing the photostability of PVC, and this is due to its high aromaticity (three phenyl rings) compared to other complexes. Such an additive acts as a hydrogen chloride scavenger, radical absorber, and hydroperoxide decomposer.

A New Statistical-Based Correlation for the Compressor Tandem Cascade Parameters Effects on the Loss Coefficient

2007 ◽  
Author(s):  
Vitaliy Yu. Nezym ◽  
Georgiy P. Polupan
Keyword(s):  
Guide Vane ◽  
Group Method ◽  
Data Handling ◽  
Blade Profile ◽  
Suction Surface ◽  
Tandem Configuration ◽  
Parametric Test ◽  
Layer Control ◽  
Loss Determination

One of the effective methods for improvement of compressor stage operation is a flow control within the compressor passages. An application of boundary layer control on the suction surface of a blade profile may be useful in tandem cascade configuration. Total tandem guide vane consists of a series of two vanes: guide vane (the first segment) and straightening vane (the rear segment). These vanes have a definite shift along the axial and peripheral direction, providing a perfect re-distributing of energy within the blade passages between different flow zones. There are several parameters influencing mainly on loss in a tandem cascade. Experimental results of the parametric test are used for the creation of a statistical model of loss determination of compressor tandem cascade using the Group Method of Data Handling (GMDH). The paper focuses on the statistical-based correlation that encompasses most pertinent parameters featuring tandem configuration and operating condition.

Calorimetric and input-output loss determination of SynRM

2014 ◽  
Author(s):  
L. Aarniovuori ◽  
J. Kolehmainen ◽  
A. Kosonen ◽  
M. Niemela ◽  
J. Pyrhonen
Keyword(s):  
Input Output ◽  
Output Loss ◽  
Loss Determination

scholarly journals Dielectric loss determination using perturbation

1992 ◽  
Vol 41 (6) ◽  
pp. 1032-1035
Author(s):  
M.Y. Andrawis ◽  
W.A. Davis ◽  
S.M. Riad ◽  
A. Elshabini-Riad
Keyword(s):  
Dielectric Loss ◽  
Loss Determination
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