Design features and current status of a uniquely packaged, variable area ratio extendible exit cone

1982 ◽  
Author(s):  
W. BAKER ◽  
S. BROWN
Keyword(s):  
Area Ratio ◽  
Current Status ◽  
Design Features

scholarly journals Postsecondary Entrance Examinations in Nigeria: A Critical Analysis of the Design and Predictive Validity of the Tripartite Assessment System

2021 ◽  
Vol 10 (1) ◽  
pp. 70-86
Author(s):  
Monsurat Omobola Raji
Keyword(s):  
Predictive Validity ◽  
Assessment System ◽  
Current Status ◽  
Prospective Students ◽  
Design Features ◽  
Admission Process ◽  
Entrance Examinations ◽  
Post Secondary ◽  
Job Roles ◽  
Standardized Examinations

Admission into post-secondary education requires the fulfillment of specific standards or criteria by prospective candidates. Criteria include, but are not limited to, standardized examinations, resumes, intent statements, tests, interviews, etc. In Nigeria, prospective students must pass three examinations as part of the admission process into post-secondary programs. Reports suggest these examinations lack the best design features and have very low predictive validity in student success in post-secondary programs and their job roles after graduation. This paper critically evaluates the design features of SSCE, UTME, and PUTME in the context of Nigeria and their predictive validity towards student learning and success as graduates. Implications of the Nigerian post-secondary entrance assessment system are discussed. Recommendations are offered from two jurisdictional models to improve the current status of the tripartite post-secondary entrance assessment system in Nigeria.

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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