scholarly journals The Research Report on the Current Status of Buddhism Development—Citing Shaoyang Prefecture as an Example

2013 ◽  
Vol 02 (02) ◽  
pp. 23-29
Author(s):  
黄 凯
Keyword(s):  
Current Status ◽  
Research Report

Research Report 8: Current Status of Joint Lubrication

1966 ◽  
Vol 181 (10) ◽  
pp. 142-145 ◽  
Author(s):  
L. Dintenfass
Keyword(s):  
Synovial Fluid ◽  
Boundary Lubrication ◽  
Rheological Behaviour ◽  
Chemical Degradation ◽  
Hydrodynamic Theory ◽  
Current Status ◽  
Research Report ◽  
Articular Surfaces ◽  
Joint Lubrication ◽  
Load Carrying

Properties of synovial fluid and cartilage are reviewed and some thought is given to the nature of joint lubrication. It does appear, at this stage, that neither the classical hydrodynamic theory of lubrication nor the boundary lubrication can permit an adequate description of the mechanism of joint lubrication; a possible solution lies in application of the elastohydrodynamic theory of lubrication, although this theory is not yet advanced enough to handle the total complexity of joint lubrication. It is suggested that, in principle, joint lubrication depends on the existence of thixotropic and elastic (normal stress phenomenon) fluid between the articular surfaces, that the area of the load-carrying film depends on the elasticity and resiliency of cartilage, and that the latter shows most variable, time- and load-dependent rheological behaviour. Pathological changes in synovial fluid leading to the change of its rheology to Newtonian, will result in a damage to the articular surfaces; on the other hand, a presence of a healthy synovial fluid per se is not sufficient to maintain an efficient lubrication. Resiliency of cartilage is responsible for the existence of elastohydrodynamic conditions; a degeneration of cartilage will lead to boundary lubrication and mechano-chemical degradation of synovial fluid. Complexity of the problems requires multi-disciplinary collaboration.

Current status of special planetary and lunar theories and ephemerides

1966 ◽  
Vol 25 ◽  
pp. 266-267
Author(s):  
R. L. Duncombe
Keyword(s):  
Observational Data ◽  
Current Status ◽  
Numerical Errors

An examination of some specialized lunar and planetary ephemerides has revealed inconsistencies in the adopted planetary masses, the presence of non-gravitational terms, and some outright numerical errors. They should be considered of temporary usefulness only, subject to subsequent amendment as required for the interpretation of observational data.

Current Status of Solid-State X-Ray Systems

1985 ◽  
Vol 43 ◽  
pp. 158-161
Author(s):  
Martin Peckerar ◽  
Anastasios Tousimis
Keyword(s):  
Solid State ◽  
Electric Fields ◽  
Spectral Lines ◽  
Current Status ◽  
Mobile Charge ◽  
Electron Hole ◽  
X Ray ◽  
Sensing Systems ◽  
Transmission Electron ◽  
Electron Microscopes

Solid state x-ray sensing systems have been used for many years in conjunction with scanning and transmission electron microscopes. Such systems conveniently provide users with elemental area maps and quantitative chemical analyses of samples. Improvements on these tools are currently sought in the following areas: sensitivity at longer and shorter x-ray wavelengths and minimization of noise-broadening of spectral lines. In this paper, we review basic limitations and recent advances in each of these areas. Throughout the review, we emphasize the systems nature of the problem. That is. limitations exist not only in the sensor elements but also in the preamplifier/amplifier chain and in the interfaces between these components.Solid state x-ray sensors usually function by way of incident photons creating electron-hole pairs in semiconductor material. This radiation-produced mobile charge is swept into external circuitry by electric fields in the semiconductor bulk.

Electron-deficient boron-based catalysts for C–H bond functionalisation

2021 ◽  
Author(s):  
Yuanhong Ma ◽  
Shao-Jie Lou ◽  
Zhaomin Hou
Keyword(s):  
Review Article ◽  
Current Status ◽  
Comprehensive Overview

This review article provides a comprehensive overview to recognise the current status of electron-deficient boron-based catalysis in C–H functionalisations.

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