Quality Assurance for a Field Trials Program

1988 ◽  
pp. 99-106
Author(s):  
James P. Ussary
Keyword(s):  
Quality Assurance ◽  
Field Trials

Minnesota Department of Transportation Case Studies for Coreless Asphalt Pavement Compaction Assessment

2020 ◽  
Vol 2674 (2) ◽  
pp. 291-301 ◽  
Author(s):  
Kyle Hoegh ◽  
Trevor Steiner ◽  
Eyoab Zegeye Teshale ◽  
Shongtao Dai
Keyword(s):  
Quality Assurance ◽  
Ground Truth ◽  
Calibration Method ◽  
Field Trials ◽  
Asphalt Pavements ◽  
Attractive Potential ◽  
Dielectric Measurements ◽  
Statistical Measures ◽  
Gyratory Compaction ◽  
Air Void

Available methods for assessing hot-mix-asphalt pavements are typically restricted to destructive methods such as coring that damage the pavement and are limited in coverage. Recently, density profiling systems (DPS) have become available with the capability of measuring asphalt compaction continuously, giving instantaneous measurements a few hundred feet behind the final roller of the freshly placed pavement. Further developments of the methods involved with DPS processing have allowed for coreless calibration by correlating dielectric measurements with asphalt specimens fabricated at variable air void contents using superpave gyratory compaction. These developments make DPS technology an attractive potential tool for quality control because of the real-time nature of the results, and quality assurance because of the ability to measure a more statistically significant amount of data as compared with current quality assurance methods such as coring. To test the viability of these recently developed methods for implementation, multiple projects were selected for field trials. Each field trial was used to assess the coreless calibration prediction by comparing with field cores where dielectric measurements were made. Ground truth core validation on each project showed the reasonableness of the coreless calibration method. The validated dielectric to air void prediction curves allowed for assessment of the tested pavements in relation to as-built characteristics, with the DPS providing the equivalent of approximately 100,000 cores per mile. Statistical measures were used to demonstrate how DPS can provide a comprehensive asphalt compaction evaluation that can be used to inform construction-related decisions and has potential as a future quality assurance tool.

Outcomes/Quality Assurance

1999 ◽  
Vol 8 (1) ◽  
pp. 15-17
Author(s):  
Michael Groher ◽  
Caryn Easterling
Keyword(s):  
Quality Assurance

Percutaneous Tracheostomy: A Multidisciplinary Approach

2008 ◽  
Vol 18 (2) ◽  
pp. 87-98 ◽  
Author(s):  
Vinciya Pandian ◽  
Thai Tran Nguyen ◽  
Marek Mirski ◽  
Nasir Islam Bhatti
Keyword(s):  
Health Care ◽  
Quality Assurance ◽  
Data Collection ◽  
Health Care Professionals ◽  
Multidisciplinary Approach ◽  
Percutaneous Tracheostomy ◽  
Johns Hopkins Hospital ◽  
Prospective Data ◽  
Comprehensive Service ◽  
Over Time

Abstract The techniques of performing a tracheostomy has transformed over time. Percutaneous tracheostomy is gaining popularity over open tracheostomy given its advantages and as a result the number of bedside tracheostomies has increased necessitating the need for a Percutaneous Tracheostomy Program. The Percutaneous Tracheostomy Program at the Johns Hopkins Hospital is a comprehensive service that provides care to patients before, during, and after a tracheostomy with a multidisciplinary approach aimed at decreasing complications. Education is provided to patients, families, and health-care professionals who are involved in the management of a tracheostomy. Ongoing prospective data collection serves as a tool for Quality Assurance.

Quality assurance of volumetric modulated arc therapy using Elekta Synergy

2009 ◽  
pp. 1-5 ◽  
Author(s):  
Akihiro Haga ◽  
Keiichi Nakagawa ◽  
Kenshiro Shiraishi ◽  
Saori Itoh ◽  
Atsuro Terahara ◽  
...  
Keyword(s):  
Quality Assurance ◽  
Volumetric Modulated Arc Therapy ◽  
Arc Therapy

Study of quality assurance in prevention and therapy of pressure sores by measurement of overlay pressure with test persons on different prophylaxis systems

Pflege ◽  
2000 ◽  
Vol 13 (5) ◽  
pp. 297-305 ◽  
Author(s):  
Stefan Roales-Welsch ◽  
Antaszek ◽  
Hense ◽  
Pfeiffer ◽  
Freyenhagen ◽  
...  
Keyword(s):  
Quality Assurance ◽  
Pressure Sores ◽  
Os Coccygis ◽  
Prevention And Therapy

In dieser Studie zur Qualitätssicherung in der Prophylaxe und Therapie des Dekubitus durch Auflagedruckmessungen bei Probanden auf sechs Weichlagerungs- und fünf Wechseldrucksystemen war die Zielsetzung, eine Ist-Analyse der am Klinikum eingesetzten Antidekubitushilfsmittel durchzuführen. Außerdem galt es herauszufinden, ob die angewandte Methode der pneumatischen Druckmessung mit Probanden auch im Versorgungsalltag verwendbar ist. Können verlässliche und valide Messdaten erwartet werden, wenn man bei betroffenen Patienten Messungen durchführt? Zur Beantwortung dieser Fragen wurden bei 23/19 Probanden, auch in Seitenlage, durch das Platzieren von Messmatten zwischen Körper und unterschiedliche Antidekubitussysteme Messungen durchgeführt. Bei den Weichlagerungssystemen kann an allen Messorten eine signifikante Druckreduzierung (p < 0,05), am Os coccygis eine hochsignifikante Druckreduzierung (p < 0,01) nachgewiesen werden. Bei den Wechseldrucksystemen liegt der Mittelwert der maximalen Druckbelastung über 12 min bei unterschiedlicher Amplitude (75,47 mmHg–5 mmHg) und verschiedener Frequenz (1,5 min–10 min) zwischen 56,39 mmHg und 38,94 mmHg.

Subtypes of Attention Deficit Hyperactivity Disorder: Evidence From DSM-IV Field Trials

1995 ◽  
Author(s):  
B. B. Lahey ◽  
B. Applegate ◽  
K. McBurnett ◽  
J. Biederman ◽  
L. Greenhill ◽  
...  
Keyword(s):  
Attention Deficit Hyperactivity Disorder ◽  
Attention Deficit ◽  
Field Trials ◽  
Hyperactivity Disorder ◽  
Dsm Iv
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