scholarly journals Comprehensive report: engineering control of silica dust from stone countertop fabrication and installation - evaluation of wetting methods for grinding.

2021 ◽  
Keyword(s):  
Silica Dust ◽  
Engineering Control

scholarly journals Masonry Dust Risk Control Practices and the Barriers to the Adoption of Engineering Controls in Reducing Risk due to Dust Exposure in Masonry Work

2021 ◽  
Vol 1200 (1) ◽  
pp. 012026
Author(s):  
N H Abas ◽  
M Mad Ali ◽  
N A Abas
Keyword(s):  
Construction Industry ◽  
Occupational Safety ◽  
Dust Exposure ◽  
Respiratory Protection ◽  
Respiratory Problems ◽  
Engineering Controls ◽  
Silica Dust ◽  
Engineering Control ◽  
Safety And Health ◽  
Control Technologies

Abstract The construction industry is known to be among the most vulnerable industries in terms of occupational safety and health. One of the riskiest activities in construction involves masonry, which reports several cases involving occupational health diseases due to the exposure to silica dust. Thus, this study aims to investigate the perception toward health risks due to exposure to dust in masonry work. A survey research method was adopted for this study, which involved the participation of 25 active construction contractors in Selangor and Kuala Lumpur. The findings reveal that respiratory problems and health diseases are the most perceived risks associated to dust exposure in masonry work. There are various barriers to the adoption of engineering control in masonry work such as high costs, lack of awareness of dust hazards, and workers’ attitudes. The current practical intervention methods used by contractor firms are respiratory protection, wet method, and sweeping compound. This study provides information on the current masonry work environment and the barriers of the adoption of engineering control technologies. Additionally, this study suggests that the key players in the construction industry should take an active part to increase the implementation of engineering controls in a construction project, and not rely solely on the use of PPE.

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.

86. Engineering Control to Prevent the Spread of Tuberculosis Among Health Care Workers in Thailand

1999 ◽  
Author(s):  
P.A. Jensen ◽  
W. Uthaivorawit ◽  
D. Garrett ◽  
P. Zuber ◽  
K. Limpakarnjanarat
Keyword(s):  
Health Care ◽  
Health Care Workers ◽  
Engineering Control ◽  
Care Workers

Silica Dust Exposure and Efficacy of Dust Control System in Small Silica Flour Mills, India

2012 ◽  
Vol 3 (4) ◽  
pp. 28-31
Author(s):  
L.J.Bhagia L.J.Bhagia ◽  
◽  
S.L.Dodia S.L.Dodia ◽  
M.I. Shaikh M.I. Shaikh
Keyword(s):  
Control System ◽  
Dust Control ◽  
Dust Exposure ◽  
Silica Dust

Continuous Decisions

2020 ◽  
Author(s):  
Seng Bum Michael Yoo ◽  
Benjamin Hayden ◽  
John Pearson
Keyword(s):  
Decision Making ◽  
Control Theory ◽  
Hierarchical Structure ◽  
Action Planning ◽  
Extended Period ◽  
Microeconomic Theory ◽  
Engineering Control ◽  
Over Time ◽  
Academic Study

Humans and other animals evolved to make decisions that extend over time with continuous and ever-changing options. Nonetheless, the academic study of decision-making is mostly limited to the simple case of choice between two options. Here we advocate that the study of choice should expand to include continuous decisions. Continuous decisions, by our definition, involve a continuum of possible responses and take place over an extended period of time during which the response is continuously subject to modification. In most continuous decisions, the range of options can fluctuate and is affected by recent responses, making consideration of reciprocal feedback between choices and the environment essential. The study of continuous decisions raises new questions, such as how abstract processes of valuation and comparison are co-implemented with action planning and execution, how we simulate the large number of possible futures our choices lead to, and how our brains employ hierarchical structure to make choices more efficiently. While microeconomic theory has proven invaluable for discrete decisions, we propose that engineering control theory may serve as a better foundation for continuous ones. And while the concept of value has proven foundational for discrete decisions, goal states and policies may prove more useful for continuous ones.

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