Thermal conductivity in higher-order generalized hydrodynamics: Characterization of nanowires of silicon and gallium nitride

2014 ◽  
Vol 60 ◽  
pp. 50-58 ◽  
Author(s):  
Clóves G. Rodrigues ◽  
Áurea R. Vasconcellos ◽  
Roberto Luzzi
Keyword(s):  
Thermal Conductivity ◽  
Gallium Nitride ◽  
Higher Order ◽  
Generalized Hydrodynamics

Characterization of Interconnect Defects Using Scanning Thermal Conductivity Microscopy

2004 ◽  
Author(s):  
H.W. Ho ◽  
J.C.H. Phang ◽  
A. Altes ◽  
L.J. Balk
Keyword(s):  
Thermal Conductivity ◽  
Integrated Circuits ◽  
Large Scale

Abstract In this paper, scanning thermal conductivity microscopy is used to characterize interconnect defects due to electromigration. Similar features are observed both in the temperature and thermal conductivity micrographs. The key advantage of the thermal conductivity mode is that specimen bias is not required. This is an important advantage for the characterization of defects in large scale integrated circuits. The thermal conductivity micrographs of extrusion, exposed and subsurface voids are presented and compared with the corresponding topography and temperature micrographs.

scholarly journals A closed-loop optogenetic screen for neurons controlling feeding in Drosophila

2021 ◽  
Author(s):  
Celia K S Lau ◽  
Meghan Jelen ◽  
Michael D Gordon
Keyword(s):  
Drosophila Melanogaster ◽  
Expression Pattern ◽  
Sensory Neurons ◽  
Closed Loop ◽  
Higher Order ◽  
Taste Detection ◽  
Proof Of Principle ◽  
Feeding Circuits

Abstract Feeding is an essential part of animal life that is greatly impacted by the sense of taste. Although the characterization of taste-detection at the periphery has been extensive, higher order taste and feeding circuits are still being elucidated. Here, we use an automated closed-loop optogenetic activation screen to detect novel taste and feeding neurons in Drosophila melanogaster. Out of 122 Janelia FlyLight Project GAL4 lines preselected based on expression pattern, we identify six lines that acutely promote feeding and 35 lines that inhibit it. As proof of principle, we follow up on R70C07-GAL4, which labels neurons that strongly inhibit feeding. Using split-GAL4 lines to isolate subsets of the R70C07-GAL4 population, we find both appetitive and aversive neurons. Furthermore, we show that R70C07-GAL4 labels putative second-order taste interneurons that contact both sweet and bitter sensory neurons. These results serve as a resource for further functional dissection of fly feeding circuits.

Near‐Field Characterization of Higher‐Order Topological Photonic States at Optical Frequencies

2021 ◽  
pp. 2004376
Author(s):  
Anton Vakulenko ◽  
Svetlana Kiriushechkina ◽  
Mingsong Wang ◽  
Mengyao Li ◽  
Dmitry Zhirihin ◽  
...  
Keyword(s):  
Near Field ◽  
Higher Order ◽  
Photonic States

A detailed characterization of the transient electron transport within zinc oxide, gallium nitride, and gallium arsenide

2012 ◽  
Vol 112 (12) ◽  
pp. 123722 ◽  
Author(s):  
Walid A. Hadi ◽  
Shamsul Chowdhury ◽  
Michael S. Shur ◽  
Stephen K. O'Leary
Keyword(s):  
Gallium Arsenide ◽  
Zinc Oxide ◽  
Gallium Nitride ◽  
Electron Transport ◽  
Detailed Characterization

scholarly journals Extended lubrication theory: improved estimates of flow in channels with variable geometry

2017 ◽  
Vol 473 (2206) ◽  
pp. 20170234 ◽  
Author(s):  
Behrouz Tavakol ◽  
Guillaume Froehlicher ◽  
Douglas P. Holmes ◽  
Howard A. Stone
Keyword(s):  
Stokes Equations ◽  
Perturbation Expansion ◽  
Accurate Estimate ◽  
Higher Order ◽  
Lubrication Theory ◽  
Channel Height ◽  
Fluid Films ◽  
Flow Characterization ◽  
Systematic Perturbation

Lubrication theory is broadly applicable to the flow characterization of thin fluid films and the motion of particles near surfaces. We offer an extension to lubrication theory by starting with Stokes equations and considering higher-order terms in a systematic perturbation expansion to describe the fluid flow in a channel with features of a modest aspect ratio. Experimental results qualitatively confirm the higher-order analytical solutions, while numerical results are in very good agreement with the higher-order analytical results. We show that the extended lubrication theory is a robust tool for an accurate estimate of pressure drop in channels with shape changes on the order of the channel height, accounting for both smooth and sharp changes in geometry.

Characterization of gallium nitride microsystems within radiation and high-temperature environments

2014 ◽  
Author(s):  
Heather C. Chiamori ◽  
Minmin Hou ◽  
Caitlin A. Chapin ◽  
Ashwin Shankar ◽  
Debbie G. Senesky
Keyword(s):  
Gallium Nitride ◽  
High Temperature

Characterization of an Improved dc Plasma Excitation Source

1980 ◽  
Vol 34 (1) ◽  
pp. 24-30 ◽  
Author(s):  
G. N. Coleman ◽  
W. P. Braun ◽  
A. M. Allen
Keyword(s):  
Thermal Conductivity ◽  
Direct Current ◽  
Direct Evidence ◽  
Plasma Jet ◽  
Sample Introduction ◽  
Direct Current Plasma ◽  
Actual Mechanism ◽  
Improved Stability ◽  
Plasma Excitation

Several modifications of the direct current plasma jet have resulted in significantly enhanced analysis capabilities. Reducing the electrode angle, decreasing the aerosol chimney size, and operating in a diffuse mode with helium have provided improved stability, sensitivity, freedom from interferences, and detection limits. While the actual mechanism of the helium enhancement is not clear, no direct evidence was found which supports participation in the excitation step. Rather, improved desolvation, vaporization and possibly sample introduction result from the thermal conductivity of helium being much greater than that of argon.

Electrical characterization of magnesium implanted gallium nitride

2002 ◽  
Vol 91 (1) ◽  
pp. 178 ◽  
Author(s):  
A. Krtschil ◽  
A. Kielburg ◽  
H. Witte ◽  
J. Christen ◽  
A. Krost ◽  
...  
Keyword(s):  
Gallium Nitride ◽  
Electrical Characterization
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