Fundamental Understanding of Cooperative Communication

Significant progress towards a fundamental understanding of transformation toughening in composite zirconia ceramics was made possible by the application of a TEM contrast analysis technique for imaging elastic strains. Spherical zirconia particles dispersed in a large-grained alumina matrix were examined by 1 MeV HVEM to simulate bulk conditions. A thermal contraction mismatch arose on cooling from the processing temperature of 1500°C to RT. Tetragonal ZrO2 contracted amisotropically with α(ct) = 16 X 10-6/°C and α(at) = 11 X 10-6/°C and faster than Al2O3 which contracted relatively isotropically at α = 8 X 10-6/°C. A volume increase of +4.9% accompanied the transformation to monoclinic symmetry at room temperature. The elastic strain field surrounding a particle before transformation was 3-dimensionally correlated with the internal crystallographic orientation of the particle and with the strain field after transformation. The aim of this paper is to theoretically and experimentally describe this technique using the ZrO2 as an example and thereby to illustrate the experimental requirements Tor such an analysis in other systems.

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Progress and perspectives on halide lithium conductors for all-solid-state lithium batteries

Energy & Environmental Science ◽

10.1039/c9ee03828k ◽

2020 ◽

Vol 13 (5) ◽

pp. 1429-1461 ◽

Cited By ~ 21

Author(s):

Xiaona Li ◽

Jianwen Liang ◽

Xiaofei Yang ◽

Keegan R. Adair ◽

Changhong Wang ◽

...

Keyword(s):

Energy Storage ◽

Solid State ◽

Lithium Batteries ◽

Electrochemical Stability ◽

Superionic Conductors ◽

Fundamental Understanding ◽

Potential Applications ◽

Synthesis Routes

This review focuses on fundamental understanding, various synthesis routes, chemical/electrochemical stability of halide-based lithium superionic conductors, and their potential applications in energy storage as well as related challenges.

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The representation of reward magnitude in the human ventral striatum and the medial orbitofrontal and ventromedial prefrontal cortex – An activation likelihood estimation meta-analysis with implications for a fundamental understanding of the human brain and substance abuse disorders

Pharmacopsychiatry ◽

10.1055/s-0031-1292500 ◽

2011 ◽

Vol 44 (06) ◽

Author(s):

L Kaps ◽

O Gruber ◽

F Falkai ◽

EK Diekhof

Keyword(s):

Substance Abuse ◽

Prefrontal Cortex ◽

Human Brain ◽

Ventral Striatum ◽

Meta Analysis ◽

Likelihood Estimation ◽

Ventromedial Prefrontal Cortex ◽

Activation Likelihood Estimation ◽

Fundamental Understanding ◽

Substance Abuse Disorders

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Sky Station Stratospheric Disaster Recovery System by Applying HAPs and Cooperative Communication Protocols

2nd International Conference on Research in Science, Engineering and Technology (ICRSET’2014), March 21-22, 2014 Dubai (UAE) ◽

10.15242/iie.e0314597 ◽

2014 ◽

Keyword(s):

Cooperative Communication ◽

Disaster Recovery ◽

Communication Protocols ◽

Recovery System ◽

Disaster Recovery System

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Predictive tool for frictional performance of piston ring-pack/liner conjunction

JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES ◽

10.15282/jmes.13.3.2019.19.0445 ◽

2019 ◽

Vol 13 (3) ◽

pp. 5513-5527

Author(s):

J. W. Tee ◽

S. H. Hamdan ◽

W. W. F. Chong

Keyword(s):

Film Thickness ◽

Mathematical Models ◽

Piston Ring ◽

Published Data ◽

Predictive Tool ◽

Frictional Losses ◽

Fundamental Understanding ◽

Minimum Film Thickness ◽

Piston Ring Pack ◽

Ring Pack

Fundamental understanding of piston ring-pack lubrication is essential in reducing engine friction. This is because a substantial portion of engine frictional losses come from piston-ring assembly. Hence, this study investigates the tribological impact of different piston ring profiles towards engine in-cylinder friction. Mathematical models are derived from Reynolds equation by using Reynolds’ boundary conditions to generate the contact pressure distribution along the complete piston ring-pack/liner conjunction. The predicted minimum film thickness is then used to predict the friction generated between the piston ring-pack and the engine cylinder liner. The engine in-cylinder friction is predicted using Greenwood and Williamson’s rough surface contact model. The model considers both the boundary friction and the viscous friction components. These mathematical models are integrated to simulate the total engine in-cylinder friction originating from the studied piston ring-pack for a complete engine cycle. The predicted minimum film thickness and frictional properties from the current models are shown to correlate reasonably with the published data. Hence, the proposed mathematical approach prepares a simplistic platform in predicting frictional losses of piston ring-pack/liner conjunction, allowing for an improved fundamental understanding of the parasitic losses in an internal combustion engine.

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