Study of chamber history effect in oxide etcher

2002 ◽  
Author(s):  
C.H. Liao ◽  
S.L. Pang ◽  
B.J. Chang ◽  
K.L. Lu
Keyword(s):  
History Effect

History Effect on Circuit Performance of SOI-MOSFETs

2020 ◽  
Author(s):  
Soumajit Ghosh ◽  
Mitiko Miura-Mattausch ◽  
Takahiro Iizuka ◽  
Hideyuki Kikuchihara ◽  
Hafizur Rahaman ◽  
...  
Keyword(s):  
Circuit Performance ◽  
History Effect

scholarly journals Czechoslovakian Wolfdog Genomic Divergence from Its Ancestors Canis lupus, German Shepherd Dog, and Different Sheepdogs of European Origin

Genes ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 832
Author(s):  
Nina Moravčíková ◽  
Radovan Kasarda ◽  
Radoslav Židek ◽  
Luboš Vostrý ◽  
Hana Vostrá-Vydrová ◽  
...  
Keyword(s):  
Demographic History ◽  
Genome Structure ◽  
Principal Component ◽  
Genetic Distances ◽  
Nucleotide Polymorphisms ◽  
German Shepherd ◽  
German Shepherd Dog ◽  
Genome Wide ◽  
Scale Population ◽  
History Effect

This study focused on the genomic differences between the Czechoslovakian wolfdog (CWD) and its ancestors, the Grey wolf (GW) and German Shepherd dog. The Saarloos wolfdog and Belgian Shepherd dog were also included to study the level of GW genetics retained in the genome of domesticated breeds. The dataset consisted of 131 animals and 143,593 single nucleotide polymorphisms (SNPs). The effects of demographic history on the overall genome structure were determined by screening the distribution of the homozygous segments. The genetic variance distributed within and between groups was quantified by genetic distances, the FST index, and discriminant analysis of principal components. Fine-scale population stratification due to specific morphological and behavioural traits was assessed by principal component and factorial analyses. In the CWD, a demographic history effect was manifested mainly in a high genome-wide proportion of short homozygous segments corresponding to a historical load of inbreeding derived from founders. The observed proportion of long homozygous segments indicated that the inbreeding events shaped the CWD genome relatively recently compared to other groups. Even if there was a significant increase in genetic similarity among wolf-like breeds, they were genetically separated from each other. Moreover, this study showed that the CWD genome carries private alleles that are not found in either wolves or other dog breeds analysed in this study.

scholarly journals The history effect in bubble growth and dissolution. Part 1. Theory

2016 ◽  
Vol 800 ◽  
pp. 180-212 ◽  
Author(s):  
Pablo Peñas-López ◽  
Miguel A. Parrales ◽  
Javier Rodríguez-Rodríguez ◽  
Devaraj van der Meer
Keyword(s):  
Bubble Dynamics ◽  
Ambient Pressure ◽  
Time History ◽  
Interfacial Concentration ◽  
Interface Concentration ◽  
Governing Differential Equation ◽  
History Of ◽  
History Effect ◽  
Isothermal Regime

The term ‘history effect’ refers to the contribution of any past mass transfer events between a gas bubble and its liquid surroundings towards the current diffusion-driven growth or dissolution dynamics of that same bubble. The history effect arises from the (non-instantaneous) development of the dissolved gas concentration boundary layer in the liquid in response to changes in the concentration at the bubble interface caused, for instance, by variations of the ambient pressure in time. Essentially, the history effect amounts to the acknowledgement that at any given time the mass flux across the bubble is conditioned by the preceding time history of the concentration at the bubble boundary. Considering the canonical problem of an isolated spherical bubble at rest, we show that the contribution of the history effect in the current interfacial concentration gradient is fully contained within a memory integral of the interface concentration. Retaining this integral term, we formulate a governing differential equation for the bubble dynamics, analogous to the well-known Epstein–Plesset solution. Our equation does not make use of the quasi-static radius approximation. An analytical solution is presented for the case of multiple step-like jumps in pressure. The nature and relevance of the history effect is then assessed through illustrative examples. Finally, we investigate the role of the history effect in rectified diffusion for a bubble that pulsates under harmonic pressure forcing in the non-inertial, isothermal regime.

Flow-history effect on higher modes in the spherical Couette system

1995 ◽  
Vol 295 (-1) ◽  
pp. 43 ◽  
Author(s):  
Koichi Nakabayashi ◽  
Yoichi Tsuchida
Keyword(s):  
Higher Modes ◽  
History Effect ◽  
Spherical Couette

scholarly journals Folic Acid Food Fortification—Its History, Effect, Concerns, and Future Directions

Nutrients ◽  
2011 ◽  
Vol 3 (3) ◽  
pp. 370-384 ◽  
Author(s):  
Krista S. Crider ◽  
Lynn B. Bailey ◽  
Robert J. Berry
Keyword(s):  
Folic Acid ◽  
Food Fortification ◽  
Future Directions ◽  
History Effect

scholarly journals The Effect of Very Cohesive Ultra-Fine Particles in Mixtures on Compression, Consolidation, and Fluidization

Processes ◽  
2019 ◽  
Vol 7 (7) ◽  
pp. 439
Author(s):  
Abbas Kamranian Marnani ◽  
Andreas Bück ◽  
Sergiy Antonyuk ◽  
Berend van Wachem ◽  
Dominique Thévenin ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Binary Mixture ◽  
Packing Density ◽  
Fine Particles ◽  
Bulk Material ◽  
Applied Pressure ◽  
Gas Velocity ◽  
History Effect ◽  
Ultra Fine Particles ◽  
Linear Manner

This paper focuses on the effect of ultra-fine ( d < 10 µm) powders in mixtures with fine ( d < 100 µm) bulk material on compression processes and also evaluates the re-fluidization behavior of the compressed bed (history effect). Achieving this goal, different mixtures of fine and ultra-fine Ground-Carbonate-Calcium were compressed at three pressure levels. The results show that by increasing the applied pressure, the compressibility decreases due to change in compaction regime. Subsequently, for the higher pressure, the slope of packing density versus applied stress curves is noticeably different. However, this slope does not depend on the size distribution of mixtures, but on the type of material. Comparing fluidization and re-fluidization curves (bed pressure drop vs. gas velocity) shows an increase in the maximum bed pressure drop ( Δ P p e a k ) for re-fluidization. By increasing the portion of ultra-fine particles in the binary mixture, Δ P p e a k increases in a non-linear manner. Furthermore, the incipient fluidization point moves to a higher gas velocity. After compression, the peak of the bed pressure drop in the re-fluidization test happens at a lower gas velocity than in the initial fluidization test. Thus, the slope of the loading curve is much larger for re-fluidization. The opposite is observed for the unloading curves.

Note on the history effect in fluid mechanics

2019 ◽  
Vol 87 (8) ◽  
pp. 643-645 ◽  
Author(s):  
Humphrey J. Maris
Keyword(s):  
Fluid Mechanics ◽  
History Effect
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