Engineering and Design: Quality Assurance Laboratory Testing Procedures

1999 ◽  
Author(s):  
CORPS OF ENGINEERS WASHINGTON DC
Keyword(s):  
Quality Assurance ◽  
Laboratory Testing ◽  
Design Quality ◽  
Testing Procedures

The Snow Ski as a Dynamic System

1972 ◽  
Vol 94 (2) ◽  
pp. 133-138 ◽  
Author(s):  
R. L. Piziali ◽  
C. D. Mote
Keyword(s):  
Dynamic System ◽  
Laboratory Testing ◽  
Research Laboratory ◽  
Field Measurements ◽  
Static System ◽  
Testing Procedures ◽  
Future Design ◽  
Meaningful Information ◽  
Physical Information ◽  
System Characteristics

Paper reports research on dynamic system characteristics of snow skis. Laboratory and field measurements of frequency response, running surface pressure excitation, and static system characteristics are intended to provide a data base of physical information to guide future design and research. Laboratory testing procedures used give meaningful information for “straight running” but not for “turning.” In general, the turning and straight running maneuvers must be examined independently. This paper summarizes the general research observations with a minimum of detail included.

scholarly journals Re-Opening Exercise Science Laboratories and Testing During the Covid-19 Endemic Phase

2020 ◽  
Author(s):  
Donald R Dengel ◽  
Nicholas G Evanoff
Keyword(s):  
Clinical Research ◽  
Laboratory Testing ◽  
Primary Grade ◽  
Exercise Science ◽  
Laboratory Personnel ◽  
Testing Procedures ◽  
Safe Environment ◽  
The World ◽  
Science Laboratories

AbstractThe coronavirus disease 2019 (COVID-19) pandemic has forced primary/grade schools and university closings as well as forced the suspension of a number of medical and laboratory testing procedures. Exercise science laboratories whether in clinical, research or educational locations were also forced to pause testing procedures. As the COVID-19 pandemic begins to subside in some areas of the world, exercise science laboratories are contemplating how to create a safe environment to resume some laboratory testing activities. In this article, we present suggestions for how exercise science laboratories can open and create a safe environment for subjects, laboratory personnel and equipment upon reopening.

scholarly journals Quality Assurance (QA) in Laboratory Testing

1970 ◽  
Vol 2 (2) ◽  
pp. 3-5 ◽  
Author(s):  
Md Tahminur Rahman
Keyword(s):  
Quality Assurance ◽  
Laboratory Testing

DOI: http://dx.doi.org/10.3329/akmmcj.v2i2.8163AKMMC J 2011; 2(2): 03-05

Stability of Cellulose Ester Base Photographic Film: Part I — Laboratory Testing Procedures

SMPTE Journal ◽  
1992 ◽  
Vol 101 (5) ◽  
pp. 336-346 ◽  
Author(s):  
P. Z. Adelstein ◽  
J. M. Reilly ◽  
D. W. Nishimura ◽  
C. J. Erbland
Keyword(s):  
Laboratory Testing ◽  
Photographic Film ◽  
Cellulose Ester ◽  
Testing Procedures ◽  
Ester Base

Cohen’s Weighted Kappa Statistic in Quality Control–Quality Assurance Procedures: Application to Network-Level Contract Pavement Surface Condition Surveys in British Columbia, Canada

2003 ◽  
Vol 1860 (1) ◽  
pp. 103-108 ◽  
Author(s):  
Shawn Landers ◽  
Wael Bekheet ◽  
Lynne Falls
Keyword(s):  
Quality Assurance ◽  
Surface Condition ◽  
Composite Index ◽  
Kappa Statistic ◽  
Weighted Kappa ◽  
Weighted Kappa Statistic ◽  
Testing Procedures ◽  
Pavement Surface ◽  
Surface Distress ◽  
Level Of Agreement

Like many provincial and municipal agencies, the British Columbia Ministry of Transportation (BCMoT) contracts out the collection of pavement surface condition data. Because BCMoT is committed to contracts with multiple private contractors, quality assurance (QA) plays a critical role in ensuring that the data are collected accurately and repeatably from year to year. Comprehensive QA testing procedures for surface distress data have been developed and implemented since the data collection has been based on visual ratings with event boards. Control sites that are manually surveyed are used to evaluate whether the contractor is correctly applying the BCMoT pavement surface distress rating system. To date, the QA testing has been based on a composite-index–based criterion for assessing the level of agreement and supplemented with the detailed severity and density rating data. However, the use of a composite index presents some limitations related to the model formulation and weightings assigned to particular distress types. Although the detailed ratings are useful as a diagnostic tool to pinpoint discrepancies, in the disaggregated format, they are not conducive as acceptance criteria for QA testing. Not widely used in the field of engineering, Cohen’s weighted kappa statistic has been applied since the 1960s in other areas to assess the level of agreement beyond chance among raters. The statistic was therefore identified as a possible solution for improving the ministry’s QA surface distress testing process by providing an overall measure of the level of agreement between the detailed manual benchmark survey and the contractor severity and density ratings. The application is described of Cohen’s weighted kappa statistic for visual surface distress survey QA testing using the BCMoT survey and testing procedures as a case study.

Strength and Behavior of Materials for Low-Volume Roads as Affected by Moisture and Density

2003 ◽  
Vol 1819 (1) ◽  
pp. 104-109 ◽  
Author(s):  
P. Paige-Green
Keyword(s):  
Quality Assurance ◽  
Southern Africa ◽  
Laboratory Testing ◽  
Simple Technique ◽  
Material Strength ◽  
Pavement Materials ◽  
Moisture Contents ◽  
Low Volume Roads ◽  
Low Volume ◽  
And Behavior

The relationships among strength, moisture, and density in pavement subgrades and layerworks are well known, but they have particular significance in low-volume roads. In these roads, the specified density is frequently not achieved (quality assurance testing tends to be reduced), and moisture fluctuations are more severe with greater consequences. Traditional studies of the material strength for these roads in southern Africa are based almost entirely on the California bearing ratio (CBR), a test with inherent problems. The test is routinely carried out to identify whether the materials under consideration have the required soaked strengths (typically CBRs of 80% or 45% for bases of different standards) at the design compaction density. Studies of the CBR at different moisture contents and densities should be carried out to identify the implications of variations in these properties on the behavior of pavement materials. A simple technique to be carried out during conventional laboratory testing was developed. Aspects pertaining to this type of study were evaluated, and the findings were related to low-volume road behavior.

New laboratory testing procedures for mix design and classification of bitumen-stabilised materials

2012 ◽  
Vol 13 (4) ◽  
pp. 618-641 ◽  
Author(s):  
K. J. Jenkins ◽  
M. E. Twagira ◽  
R. W. Kelfkens ◽  
W. K. Mulusa
Keyword(s):  
Laboratory Testing ◽  
Mix Design ◽  
Testing Procedures
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