Results 261 to 270 of about 202,700 (314)
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The Determination of Airborne Radioactivity
American Industrial Hygiene Association Journal, 1961Abstract Practical procedures for the gross differentiation and quantitative determination of natural and artificial airborne particulate radioactivities are presented. The proper choice of instruments and time of counting is necessary for the separate determinations. Details of methods are given with formulae for calculations.
L R, SETTER, G I, COATS
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2017
In order to change the control approach that commercially available Unmanned Aerial Vehicles (UAVs) use to execute a flight plan, which is based on the Global Positioning System (GPS) and assuming an obstacle-free environment, we propose a hierarchical multi-layered control system that permits to a UAV to define the flight plan during flight and locate
Daniel Soto-Guerrero +1 more
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In order to change the control approach that commercially available Unmanned Aerial Vehicles (UAVs) use to execute a flight plan, which is based on the Global Positioning System (GPS) and assuming an obstacle-free environment, we propose a hierarchical multi-layered control system that permits to a UAV to define the flight plan during flight and locate
Daniel Soto-Guerrero +1 more
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Environmental Science & Technology, 2003
Haloacetic acid (HAA) concentrations were measured in air samples from a semi-rural and a highly urbanized site in southern Ontario throughout 2000 to investigate their sources and gas-particle partitioning behavior. Denuders were efficient for collection of gaseous HAAs, and the particle phase was collected on a downstream quartz filter with ...
Jonathan W, Martin +6 more
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Haloacetic acid (HAA) concentrations were measured in air samples from a semi-rural and a highly urbanized site in southern Ontario throughout 2000 to investigate their sources and gas-particle partitioning behavior. Denuders were efficient for collection of gaseous HAAs, and the particle phase was collected on a downstream quartz filter with ...
Jonathan W, Martin +6 more
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Analytical Chemistry, 2000
A miniaturized analysis system for the study of living cells and biochemical reactions in microdroplets was developed. The technique utilizes an in-house-developed piezoelectric flow-through droplet dispenser for precise reagent supply and an ultrasonic levitator for contactless sample handling.
S, Santesson +5 more
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A miniaturized analysis system for the study of living cells and biochemical reactions in microdroplets was developed. The technique utilizes an in-house-developed piezoelectric flow-through droplet dispenser for precise reagent supply and an ultrasonic levitator for contactless sample handling.
S, Santesson +5 more
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Determination of airborne isocyanates
Analytical and Bioanalytical Chemistry, 2006Isocyanates are important in industrial hygiene and workplace monitoring. Owing to their severe acute toxicity and sensitizing properties, analytical methods with high sampling efficiency and sensitivity in the low ppb to ppt range are required. The reactivity of isocyanates necessitates initial derivatization with nucleophilic agents--usually amines ...
Henneken, H., Vogel, M., Karst, U.
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A compatible airborne multiprocessor
Proceedings of the November 18-20, 1969, fall joint computer conference on - AFIPS '69 (Fall), 1969The control of large military forces is creating the need for large data-processing systems located in transport aircraft and in other situations where tight quarters and hostile environments call for the design features found in airborne systems. In these applications the configuration of the computer and its peripheral equipment strongly resembles ...
E. J. Dieterich, L. C. Kaye
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2013 IEEE International Geoscience and Remote Sensing Symposium - IGARSS, 2013
In 2012, a large airborne campaign dedicated to radar backscattering measurements over natural surfaces has been undertaken by ONERA. This campaign, KaSAR, was funded by ESA in the frame of the Living Planet Program. Different surface types have been addressed, such as water surfaces (lakes and sea), continental surfaces (agricultural areas, forests ...
Jean-François Nouvel +2 more
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In 2012, a large airborne campaign dedicated to radar backscattering measurements over natural surfaces has been undertaken by ONERA. This campaign, KaSAR, was funded by ESA in the frame of the Living Planet Program. Different surface types have been addressed, such as water surfaces (lakes and sea), continental surfaces (agricultural areas, forests ...
Jean-François Nouvel +2 more
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Measurement of airborne cyanoacrylates
The Annals of Occupational Hygiene, 1998The behaviour of common alkyl-2-cyanoacrylates in air has been investigated. Increasing humidity was found to increase the rate of polymerisation, although polymerisation is not instantaneous, even at high humidities. Sampling methods for these compounds have been studied and we are able to recommend a pumped Tenax sampling tube, although certain ...
C, Keen, I, Pengelly, J A, Groves
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Airborne infection in hospital
Journal of Hospital Infection, 1982Before the era of microbiology certain diseases were thought to be caused by noxious exhalations (‘miasmata’) arising from putrescent organic matter. Gregory (1788), for example, placed miasmata at the head of his list of ‘general causes of fever’, and also included among these causes ‘a certain state of the air which produces epidemical fevers, from ...
G A, Ayliffe, E J, Lowbury
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AIRBORNE SPREAD OF BRUCELLOSIS
Annals of the New York Academy of Sciences, 1980review of epidemic and endemic brucellosis at six abattoirs demonstrates a correlation between case distribution and flow of air from the kill department (stage II) to other areas within an abattoir. Air from the kill department disseminated to nearby departments led to abnormally high brucellosis attack rates for persons who worked in these areas at ...
A F, Kaufmann +6 more
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