atmospheric testing Articles

  • Minimizing flow distortion errors in a sonic anemometer

    This paper describes a simple approach to minimizing probe-induced flow distortion errors in a three-axis sonic anemometer. By separating the three axes, mutual interference between the transducers and supports in the three arrays is reduced. Only a transducer shadow correction determined from wind tunnel tests is needed to obtain measurements that are virtually insensitive to probe orientation ...

  • Read about Confined Space in Construction and Atmospheric Testing Right Here!

    In 1993, 29 CFR 1910.146 went into effect as the first federal legislation governing entry into permit-required confined spaces in general industry. Because some industries, such as the construction industry, were covered by specific Occupational Safety and Health Administration (OSHA) safety regulations, they were exempt from the confined space entry requirements of the general industry rule. ...


    By Premier Safety

  • Scottish Company Peak Scientific offer solutions to the world helium shortage

    Recent international studies have confirmed that the world will run out of helium gas in 25 years if current usage remains unchecked. As well as concerns for the future the gases scarcity has seen its price rise by 70% in recent years. Used in a multitude of applications such as cryogenic applications, purging/pressuring, welding cover gas and controlled atmosphere testing, demand for helium gas ...

  • The Boulder Atmospheric Observatory

    Abstract The Boulder Atmospheric Observatory (BAO) is a unique research facility for studying the planetary boundary layer and for testing and calibrating atmospheric sensors. The facility includes a 300 m tower instrumented with fast- and slow-response sensors, a variety of remote sensing systems, and a real-time processing and display capability that greatly reduces analysis time for ...

  • Uncertainty analysis of modelling studies included in air quality assessments

    This paper deals with the development of a quality analysis/quality control (QA/QC) methodology for modelling studies associated with air quality assessments. Among other benefits, this will allow data quality objectives for model input data to be derived and the importance of policy oriented model applications to be assessed. The procedure for evaluating model uncertainty has profited from a ...


    By Inderscience Publishers

  • Development and first tests of a data assimilation algorithm in a Lagrangian puff atmospheric dispersion model

    The development of a Data Assimilation algorithm based on variational approach that allows estimation of source emission rate in Lagrangian particle/puff Atmospheric Dispersion Models for non-stationary (wind and source) conditions is presented. The one-dimensional tests including constant and variable in time source emission rate and wind velocity showed that methodology can be extended to take ...


    By Inderscience Publishers

  • TEST RESULTS: atmospheric water is safe to drink

    A certified lab has performed a test of a water sample obtained from one of Tsunami® atmospheric water generators. The testing was extremely thorough — the report that lists test results is 13 pages long, showing results with respect to more than 100 microbiological and chemical items. It shows that levels of Inorganic Chemicals, Synthetic & Volatile Organic Chemicals, Radionuclides ...


    By Tsunami Products, Inc.

  • Absolute - Pressure (psia) vs Gauge - Pressure (psig)

    Here is the scenario: You have just received your brand new Ashcroft Test Gauge. Why??? Because you know that the gauge on your canister is not accurate enough for making reliable quantitative dilutions. You notice that your brand-spanking-new Ashcroft Test Gauge is not ...


    By Restek Corporation

  • Validation of the Demokritos dispersion modelling system based on the Indianapolis experiment

    To assess the ability of a model to simulate atmospheric dispersion, its performance must be tested using data from real field experiments. This paper presents the results of a validation study of the atmospheric dispersion model Dispersion over Complex Terrain (DIPCOT) against data from the Indianapolis field experiment. Three different modules of the dispersion code are examined a puff model, a ...


    By Inderscience Publishers

  • Assessing the Impact of Atmospheric Wet and Dry Deposition using Chemical and Toxicological Analysis

    Abstract :Chemical analyses and toxicity test results for atmospheric wet and dry deposition from 5 sampling sites in Greece are presented in this study. In most of the samples examined, the heavy metals content of the filtered water samples was relatively low. There was quite a high concentration of amorphous sulphur and carbon in the solid particles of the deposition. Beta radiation level was ...


    By Microbiotests Inc.

  • HAZWOPER – Different, Not Less

    When we think of a hazardous material event, we often think of firefighters and technicians rushing in with large plastic space-like suits to stop the leak and save the day. These first responders definitely play a large role in the mitigation of these emergency situations, but sometimes we tend to forget about the second – due responders who pick up the pieces and begin recovery. ...


    By HazSim

  • Ionising Radiation

    Introduction The energy level of some types of radiation is high enough so that when they interact with matter they cause the formation of electrically charged particles or ion-pairs and break molecular bonds. These so-called ionising radiations are by their nature potentially harmful to life; at high doses they can be lethal and at lower doses can cause genetic damage. Ionising radiation occurs ...

  • Testing modified atmosphere packaging of gluten free bakery products - Case Study

    Gluten free bakery packaging tested using Systech Illinois gas analysis equipment Ultrapharm’s quality control laboratory use the Gaspace Advance, oxygen and carbon dioxide headspace analyser to monitor their modified atmosphere packs at regular intervals. Ultrapharm Ltd started their gluten free bakery business in 1993, manufacturing a small product line to coeliac’s in the UK. ...

  • A Nordic harmonisation effort concerning atmospheric dispersion modelling for real-time accident situations

    Neighbouring countries have often chosen different atmospheric dispersion prognosis models for use in emergency situations. This may result in differences in the predictions, which in turn can lead to the authorities adopting different countermeasures. In a Nordic project within the Nordic Nuclear Safety Research Programme (NKS), a Nordic harmonisation and comparison effort was initiated in the ...


    By Inderscience Publishers

  • Radioiodine Collection Filter Efficiency Testing Program

    The key elements of the F&J quality assurance program for the manufacture of TEDA impregnated charcoal and silver zeolite cartridges utilized in the collection of airborne radioactive iodine species in power plant atmospheres include the following: 1. Testing is performed on every batch of adsorbent material 2. ...


    By F&J SPECIALTY PRODUCTS, INC.

  • Hydrogen sulfide gas emission under turbulent conditions – an experimental approach for free-fall drops

    Odor nuisance and sulfide corrosion in sewers carrying septic wastewater are accelerated at points of turbulence such as drops in manholes, but accurate methods or empirical expressions to evaluate the gas stripping rate at those particular sites are still missing. With the aim of improving the current knowledge on the influence of free-fall drops on the release of hydrogen sulfide gas, an ...


    By IWA Publishing

  • The influence of the land surface on hydrometeorology and ecology: new advances from modeling and satellite remote sensing

    The importance of land surface processes has long been recognized in hydrometeorology and ecology for they play a key role in climate and weather modeling. However, their quantification has been challenging due to the complex nature of the land surface amongst other reasons. One of the difficult parts in the quantification is the effect of vegetation that are related to land surface processes ...


    By IWA Publishing

  • Explosion Proof Camera Videoscope-XT: The Tool for Risky Tasks

    We have recently launched the sale of a truly innovative video borescope with a particular focus on NDT professionals working in explosion prone environments. The new Videoscope-XT underwent a series of stringent tests under the MIL-STD-810G in an explosive atmosphere, and meets the requirements of NFPA 70 – Class 1 Division 2. Thus, the new inspection system fills the void providing the ...


    By Fiberscope.net by Medit Inc.

  • Combating Corrosion - Committee G01 Standards Fight Nature’s Destructive Tendencies

    The evening news may leave many of us feeling war-weary, but one ASTM International technical committee has been successful in conflict of a different sort. It’s a commonplace but epic struggle between the natural and civilized worlds — the fight against metal corrosion. For the past half-century, the weapon of choice of ASTM Committee ...


    By ASTM International

  • Validation of atmospheric dispersion models using ETEX data

    Two models frequently used to simulate the dispersion of pollutants in the atmosphere have been compared. This is necessary because only a well-tested and well-calibrated simulation model can be a good representation of the reality of the dispersion of pollutants. The models evaluated (HYSPLIT_4 with its four variants and MEDIA) were run using as input parameters the same meteorological dataset ...


    By Inderscience Publishers

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