Best practice engineering control guidelines to control worker exposure to respirable crystalline silica during asphalt pavement milling.

2015 ◽  
Keyword(s):  
Best Practice ◽  
Asphalt Pavement ◽  
Crystalline Silica ◽  
Worker Exposure ◽  
Engineering Control

Synthesis of Longitudinal Joint of Flexible Pavement

2015 ◽  
Vol 73 (4) ◽  
Author(s):  
Mohd Rosli Mohd Hasan ◽  
David Porter ◽  
Zhanping You
Keyword(s):  
Best Practice ◽  
Asphalt Pavement ◽  
Field Studies ◽  
Performance Evaluations ◽  
Construction Methods ◽  
Wide Range ◽  
Longitudinal Joint ◽  
Longitudinal Joints ◽  
Machine Operator ◽  
Selection Of

This paper provides a wide range of information related to longitudinal joints of asphalt pavement, such as types of longitudinal joints, performance evaluations, factors of failure, and selection of the best practice in constructing longitudinal joints. Additionally, this synthesis provides an overview of construction methods which are typically used in constructing longitudinal joints, along with guides and approaches implemented by different road builders or authorities to attain a better longitudinal joint. It was found that difficulties during compaction of the asphalt pavement at the center line resulted in poor joint density. This has reduced the performance and durability of pavement that is associated with cracks and degradations due to moisture damage, such as raveling. Results from previous field studies and laboratory evaluations have been summarized to understand the factors of failure of the adjacent joint. The Michigan joint technique was found to be the best method in constructing longitudinal joints of HMA. The cutting wheel and the edge restraining device techniques are also recommended by the asphalt technologists however are dependent on the machine operator to obtain consistent results.  

Human Occupational and Industrial Vibration

1988 ◽  
Vol 31 (2) ◽  
pp. 58-62
Author(s):  
Donald Wasserman
Keyword(s):  
Whole Body Vibration ◽  
Work Practice ◽  
Whole Body ◽  
Body Vibration ◽  
Worker Exposure ◽  
Practice Recommendations ◽  
Engineering Control ◽  
The U.S ◽  
Vibration Standards

The medical/epidemiological and engineering aspects of both whole-body and hand-arm occupational/industrial vibration are discussed. Eight million workers in the U.S. are exposed to occupational vibration. Current hand-arm and whole-body vibration standards are also presented, along with engineering control and work practice recommendations for minimizing worker exposure to vibration.

Online Surveys: A Potential Weapon Against Clinician Non-Compliance

2012 ◽  
Vol 17 (1) ◽  
pp. 38-41 ◽  
Author(s):  
Gregory J. Schears
Keyword(s):  
Best Practices ◽  
Best Practice ◽  
Central Line ◽  
Infectious Complications ◽  
Complication Rates ◽  
Infectious Agents ◽  
Online Surveys ◽  
Root Cause ◽  
Worker Exposure ◽  
Pros And Cons

Abstract Over the last two decades, our understanding of the pathogenesis of central line associated blood steam infections has improved significantly. Also, increased attention has been focused on reducing healthcare worker exposure to infectious agents. Best practice protocols have been developed to eliminate unnecessary morbidity, mortality and costs associated with these infections and exposures. Adoption of these best practices has been incomplete and non-compliance is a major factor preventing our infectious complication rates from reaching zero. Getting at the root cause of noncompliance is complex. Online surveys are uniquely positioned to help understand the human factors contributing to non-compliance. This article reviews some of the pros and cons associated with the use of online surveys. Using several relevant recent examples, this article explores how these surveys can be used to identify those factors that create barriers to compliance. By better understanding all the issues involved with non-compliance, we will be able to create strategies and engineer products to improve best practice protocol compliance and reduce the human factor contribution to our patient's infectious complications.

Investigation of irradiation-induced nucleation processes in silicon and germanium

1995 ◽  
Vol 53 ◽  
pp. 224-225
Author(s):  
Harry A. Atwater ◽  
C.M. Yang ◽  
K.V. Shcheglov
Keyword(s):  
Room Temperature ◽  
Crystal Size ◽  
Initial Distribution ◽  
Engineering Control ◽  
Size Evolution ◽  
Silicon And Germanium ◽  
Ge Quantum Dot ◽  
And Control ◽  
Germanium Quantum Dots ◽  
Kinetics Of

Studies of the initial stages of nucleation of silicon and germanium have yielded insights that point the way to achievement of engineering control over crystal size evolution at the nanometer scale. In addition to their importance in understanding fundamental issues in nucleation, these studies are relevant to efforts to (i) control the size distributions of silicon and germanium “quantum dots𠇍, which will in turn enable control of the optical properties of these materials, (ii) and control the kinetics of crystallization of amorphous silicon and germanium films on amorphous insulating substrates so as to, e.g., produce crystalline grains of essentially arbitrary size.Ge quantum dot nanocrystals with average sizes between 2 nm and 9 nm were formed by room temperature ion implantation into SiO2, followed by precipitation during thermal anneals at temperatures between 30°C and 1200°C[1]. Surprisingly, it was found that Ge nanocrystal nucleation occurs at room temperature as shown in Fig. 1, and that subsequent microstructural evolution occurred via coarsening of the initial distribution.

Meeting the Best Practice for Hearing Aid Verification in Children: Challenges and Future Directions

2019 ◽  
Vol 28 (4) ◽  
pp. 877-894
Author(s):  
Nur Azyani Amri ◽  
Tian Kar Quar ◽  
Foong Yen Chong
Keyword(s):  
Clinical Practice ◽  
Hearing Aids ◽  
Best Practice ◽  
Hearing Aid ◽  
Evidence Based ◽  
Future Directions ◽  
Major Barrier ◽  
Klang Valley ◽  
Age Range ◽  
Fitting Hearing Aids

Purpose This study examined the current pediatric amplification practice with an emphasis on hearing aid verification using probe microphone measurement (PMM), among audiologists in Klang Valley, Malaysia. Frequency of practice, access to PMM system, practiced protocols, barriers, and perception toward the benefits of PMM were identified through a survey. Method A questionnaire was distributed to and filled in by the audiologists who provided pediatric amplification service in Klang Valley, Malaysia. One hundred eight ( N = 108) audiologists, composed of 90.3% women and 9.7% men (age range: 23–48 years), participated in the survey. Results PMM was not a clinical routine practiced by a majority of the audiologists, despite its recognition as the best clinical practice that should be incorporated into protocols for fitting hearing aids in children. Variations in practice existed warranting further steps to improve the current practice for children with hearing impairment. The lack of access to PMM equipment was 1 major barrier for the audiologists to practice real-ear verification. Practitioners' characteristics such as time constraints, low confidence, and knowledge levels were also identified as barriers that impede the uptake of the evidence-based practice. Conclusions The implementation of PMM in clinical practice remains a challenge to the audiology profession. A knowledge-transfer approach that takes into consideration the barriers and involves effective collaboration or engagement between the knowledge providers and potential stakeholders is required to promote the clinical application of evidence-based best practice.

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