scholarly journals A Need to Revise Human Exposure Limits for Ultraviolet UV‐C Radiation †

2021 ◽  
Author(s):  
David H. Sliney ◽  
Bruce E. Stuck
Keyword(s):  
Human Exposure ◽  
Exposure Limits ◽  
Uv C

Acceptable Levels of Vibration on Ships

1973 ◽  
Vol 10 (02) ◽  
pp. 105-111
Author(s):  
F. Everett Reed
Keyword(s):  
Human Exposure ◽  
Whole Body Vibration ◽  
Whole Body ◽  
Exposure Limits ◽  
Body Vibration ◽  
International Standard ◽  
Time Exposure ◽  
Proficiency Level ◽  
Draft International Standard ◽  
Sound Foundation

The Draft International Standard ISO/DIS 2631 "Guide for the Evaluation of Human Exposure to Whole-Body Vibration" provides an excellent base for setting acceptable levels of vibration on ships.2 A standard for evaluating vibration levels has been needed for some time and the new standard not only provides a sound foundation for evaluating vibration, but also permits the vibration levels to be rated numerically as percentages of the established standard of fatigue-decreased proficiency. The standard is related to frequency, direction of motion, and the time exposure at the different locations in the ship. "Safe exposure limits" and "reduced comfort limits" are defined in terms of percentages of this same fatigue-decreased proficiency level.

Metabolism of an Industrial Uranium Trioxide Dust after Deposition in the Rat Lung

1985 ◽  
Vol 4 (6) ◽  
pp. 563-572 ◽  
Author(s):  
G.N. Stradling ◽  
J.W. Stather ◽  
M. Ellender ◽  
S.A. Sumner ◽  
J.C. Moody ◽  
...  
Keyword(s):  
Human Exposure ◽  
Aqueous Suspension ◽  
Direct Injection ◽  
Rat Lung ◽  
Exposure Limits ◽  
Short Term ◽  
Uranium Trioxide ◽  
Hexavalent Uranium ◽  
Uranium Compounds ◽  
Body Tissues

Uranium trioxide, produced industrially, was administered to rats either by inhalation or direct injection of an aqueous suspension into the lungs. The results: 1 show that uranium was cleared rapidly from the lungs, mainly to the blood; 2 show that distribution of uranium among body tissues, and the fraction of the systemic content excreted in urine, was similar to that obtained for other transportable hexavalent uranium compounds; 3 suggest that urine monitoring data would be of more value than lung radioactivity counting measurements for assessing occupational human exposure; 4 indicate that for setting exposure limits by inhalation the uranium trioxide should be considered a highly transportable compound. Thus intakes by workers should be restricted to those recommended for short-term exposures and not those based on an annual limit.

Examination of a Split Transformer Arrangement for the Inductive Link of Contactless Power Transfer Systems

2016 ◽  
Vol 856 ◽  
pp. 178-183
Author(s):  
Eleni Gati ◽  
Antonios G. Kladas ◽  
Stefanos N. Manias
Keyword(s):  
Human Exposure ◽  
Relevant Literature ◽  
Cost Comparison ◽  
Transfer System ◽  
Power Transfer ◽  
Exposure Limits ◽  
Inductive Power Transfer ◽  
Air Gaps ◽  
The Magnetic Field ◽  
Contactless Power Transfer

In this work, a split transformer topology is proposed for use in a wireless electric vehicle charger. The topology presents desirable characteristics concerning minimization of the air gap, easiness of alignment, weight and cost. Comparison is performed with spiral topologies presented in relevant literature. The coupling coefficient of the system for various air gaps and misalignment conditions is extracted by 3D finite element simulations and experimentally validated by a 3 kW prototype inductive power transfer system. The magnetic field at nominal power of operation is also simulated for evaluation of the compliance to the human exposure limits.

Analysis of Potential for Human Exposure to Aerial Dispersant Application

2017 ◽  
Vol 2017 (1) ◽  
pp. 2147-2163
Author(s):  
Wolfgang J. Konkel
Keyword(s):  
Human Exposure ◽  
Oil Well ◽  
Exposure Limits ◽  
Environmental Persistence ◽  
Worker Exposure ◽  
Chemical Dispersant ◽  
Subsurface Waters ◽  
Cleanup Workers ◽  
Over 40 Years ◽  
Surface And Subsurface Waters

ABSTRACT The response to the Macondo oil well blow-out in the Gulf of Mexico in 2010, utilized significant quantities of dispersants. The way dispersants make oil available to natural biodegradation, their environmental effects, and overall benefits in oil spill reponse were well understood by the oil and spill response industries. These materials have been studied and improved for over 40 years. In spill response scenarios like Macondo, the large quantities of dispersant utilized raised concerns regarding human exposures. This paper provides the following:An analysis of dispersant spray drift from aerial application of oil dispersant.A review of the exclusion zones established by the Region IV and VI Regional Response Teams (RRT’s).Evidence that the controls to protect cleanup workers were effective. The volume of chemical dispersant utilized in the Macondo response is often presented as an indicator suggesting human exposure. While the volume is interesting, the application, its dilution in the water column, and its environmental persistence are far better measures of the potential for human exposure. Furthermore, the controls that were required by the Federal–On-Scene-Coordinator to ensure responder and public safety are critical considerations. These controls were designed and implemented by Regulators and supported by appropriate health professionals to avoid the possibility of human exposure. These controls were established and published well before the Macondo spill. Studies were undertaken during the 2010 spill response to examine surface and subsurface waters to determine the presence of dispersant constituents. Spill response worker exposure was evaluated in both offshore and on-shore clean-up areas during dispersant application. The studies found no evidence that response workers were exposed to levels of constituents that approached occupational exposure limits.

On the averaging area for incident power density for human exposure limits at frequencies over 6 GHz

2017 ◽  
Vol 62 (8) ◽  
pp. 3124-3138 ◽  
Author(s):  
Yota Hashimoto ◽  
Akimasa Hirata ◽  
Ryota Morimoto ◽  
Shinta Aonuma ◽  
Ilkka Laakso ◽  
...  
Keyword(s):  
Power Density ◽  
Human Exposure ◽  
Incident Power ◽  
Exposure Limits ◽  
Incident Power Density
Sign in / Sign up

Export Citation Format

Share Document