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1

ARM: Surface Radiation Measurement Quality Control testing, including climatologically configurable limits  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

Surface Radiation Measurement Quality Control testing, including climatologically configurable limits

Hodges, Gary; Stoffel, Tom; Kutchenreiter, Mark; Kay, Bev; Habte, Aron; Ritsche, Michael; Morris, Victor; Anderberg, Mary

2

Radiation Dose Metrics in CT: Assessing Dose Using the National Quality Forum CT Patient Safety Measure  

Science Journals Connector (OSTI)

Purpose The National Quality Forum (NQF) is a nonprofit consensus organization that recently endorsed a measure focused on CT radiation doses. To comply, facilities must summarize the doses from consecutive scans within age and anatomic area strata and report the data in the medical record. Our purpose was to assess the time needed to assemble the data and to demonstrate how review of such data permits a facility to understand doses. Methods and Materials To assemble the data we used for analysis, we used the dose monitoring software eXposure to automatically export dose metrics from consecutive scans in 2010 and 2012. For a subset of 50 exams, we also collected dose metrics manually, copying data directly from the PACS into an excel spreadsheet. Results Manual data collection for 50 scans required 2 hours and 15 minutes. eXposure compiled the data in under an hour. All dose metrics demonstrated a 30% to 50% reduction between 2010 and 2012. There was also a significant decline and a reduction in the variability of the doses over time. Conclusion The NQF measure facilitates an institution's capacity to assess the doses they are using for CT as part of routine practice. The necessary data can be collected within a reasonable amount of time either with automatic software or manually. The collection and review of these data will allow facilities to compare their radiation dose distributions with national distributions and allow assessment of temporal trends in the doses they are using.

Jillian Keegan; Diana L. Miglioretti; Robert Gould; Lane F. Donnelly; Nicole D. Wilson; Rebecca Smith-Bindman

2014-01-01T23:59:59.000Z

3

Quality Control Quantification (QCQ): A Tool to Measure the Value of Quality Control Checks in Radiation Oncology  

SciTech Connect (OSTI)

Purpose: To quantify the error-detection effectiveness of commonly used quality control (QC) measures. Methods: We analyzed incidents from 2007-2010 logged into a voluntary in-house, electronic incident learning systems at 2 academic radiation oncology clinics. None of the incidents resulted in patient harm. Each incident was graded for potential severity using the French Nuclear Safety Authority scoring scale; high potential severity incidents (score >3) were considered, along with a subset of 30 randomly chosen low severity incidents. Each report was evaluated to identify which of 15 common QC checks could have detected it. The effectiveness was calculated, defined as the percentage of incidents that each QC measure could detect, both for individual QC checks and for combinations of checks. Results: In total, 4407 incidents were reported, 292 of which had high-potential severity. High- and low-severity incidents were detectable by 4.0 {+-} 2.3 (mean {+-} SD) and 2.6 {+-} 1.4 QC checks, respectively (P<.001). All individual checks were less than 50% sensitive with the exception of pretreatment plan review by a physicist (63%). An effectiveness of 97% was achieved with 7 checks used in combination and was not further improved with more checks. The combination of checks with the highest effectiveness includes physics plan review, physician plan review, Electronic Portal Imaging Device-based in vivo portal dosimetry, radiation therapist timeout, weekly physics chart check, the use of checklists, port films, and source-to-skin distance checks. Some commonly used QC checks such as pretreatment intensity modulated radiation therapy QA do not substantially add to the ability to detect errors in these data. Conclusions: The effectiveness of QC measures in radiation oncology depends sensitively on which checks are used and in which combinations. A small percentage of errors cannot be detected by any of the standard formal QC checks currently in broad use, suggesting that further improvements are needed. These data require confirmation with a broader incident-reporting database.

Ford, Eric C., E-mail: eford@uw.edu [Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, Baltimore, Maryland (United States); Terezakis, Stephanie; Souranis, Annette; Harris, Kendra [Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, Baltimore, Maryland (United States)] [Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, Baltimore, Maryland (United States); Gay, Hiram; Mutic, Sasa [Department of Radiation Oncology, Washington University, St. Louis, Missouri (United States)] [Department of Radiation Oncology, Washington University, St. Louis, Missouri (United States)

2012-11-01T23:59:59.000Z

4

Data Quality of Quality Measurement Experiments  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Data Quality of Quality Measurement Experiments Data Quality of Quality Measurement Experiments S. Bottone and S. Moore Mission Research Corporation Santa Barbara, California Introduction Quality Measurement Experiments (QME) are a special class of Value-Added Products (VAP). QMEs add value to Atmospheric Radiation Measurement (ARM) Program datastreams by providing for continuous assessment of the quality of incoming data based on internal consistency checks, comparisons between independent similar measurements, or comparisons between measurements and modeled results. Like any datastream, QME datastreams need to be checked for data quality. For each QME, we analyze a representative sample of files from the ARM data archive to determine 'typical' values of the QME variables. We then design outlier tests, specific to each variable, to be applied to

5

ARM - Measurement - Backscattered radiation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

govMeasurementsBackscattered radiation govMeasurementsBackscattered radiation ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Backscattered radiation The scattering of radiant energy into the hemisphere of space bounded by a plane normal to the direction of the incident radiation and lying on the same side as the incident ray. Categories Aerosols, Cloud Properties Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments AOS : Aerosol Observing System IAP : In-situ Aerosol Profiles (Cessna Aerosol Flights)

6

Downhole steam quality measurement  

DOE Patents [OSTI]

The present invention relates to an empirical electrical method for remote sensing of steam quality utilizing flow-through grids which allow measurement of the electrical properties of a flowing two-phase mixture. The measurement of steam quality in the oil field is important to the efficient application of steam assisted recovery of oil. Because of the increased energy content in higher quality steam it is important to maintain the highest possible steam quality at the injection sandface. The effectiveness of a steaming operation without a measure of steam quality downhole close to the point of injection would be difficult to determine. Therefore, a need exists for the remote sensing of steam quality.

Lee, D.O.; Montoya, P.C.; Muir, J.F.; Wayland, J.R. Jr.

1985-06-19T23:59:59.000Z

7

ARM - Measurement - Radiative heating rate  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

govMeasurementsRadiative heating rate govMeasurementsRadiative heating rate ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Radiative heating rate The heating rate due to the divergence of long and shortwave radiative flux. Categories Radiometric, Atmospheric State Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. External Instruments MOLTS : Model Output Location Time Series Datastreams MOLTS : Model Output Location Time Series Datastreams MOLTSEDASSNDCLASS1 : Model Output Loc. Time Ser. (MOLTS): EDAS

8

Atmospheric Radiation Measurement Program  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

3 3 ARM 2003 Tom Ackerman Chief Scientist Tom Ackerman Chief Scientist ARM ARM Atmospheric Radiation Measurement Atmospheric Radiation Measurement WARNING! WARNING! Today is April 1 But that has NO bearing on this message Today is April 1 But that has NO bearing on this message ARM ARM Atmospheric Radiation Measurement Atmospheric Radiation Measurement Two Topics Two Topics * Status of ARM (quick overview) * Science plan - ARM in the next 5 years * Status of ARM (quick overview) * Science plan - ARM in the next 5 years ARM ARM Atmospheric Radiation Measurement Atmospheric Radiation Measurement ARM Status - Science ARM Status - Science * Steadily increasing productivity - Poster session - over 220 posters (may need to do something about submissions next year) - Peer-reviewed articles: 2.5 to 3 per year per

9

ARM - Measurement - Aerosol backscattered radiation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

backscattered radiation backscattered radiation ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Aerosol backscattered radiation The scattering of radiant energy into the hemisphere of space bounded by a plane normal to the direction of the incident radiation and lying on the same side as the incident ray. Categories Aerosols Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments AOS : Aerosol Observing System MPL : Micropulse Lidar NEPHELOMETER : Nephelometer

10

Reimagining Quality Measurement  

Science Journals Connector (OSTI)

...would reflect both the appropriateness of individualized care plans and the degree to which they are being carried out effectively, both for individual patients and for the population cared for by a given physician, medical group, or health care system or within a particular community. Patients with multiple... In a reimagined approach, quality measurement in health care would be integrated with care delivery, address the challenges that confront doctors every day, and reflect individual patients' preferences and goals for treatment and health outcomes.

McGlynn E.A.Schneider E.C.Kerr E.A.

2014-12-04T23:59:59.000Z

11

ARM ARM Atmospheric Radiation Measurement Atmospheric Radiation Measurement  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

An Integrated Column Description An Integrated Column Description of the Atmosphere An Integrated Column Description of the Atmosphere Tom Ackerman Chief Scientist Tom Ackerman Chief Scientist ARM ARM Atmospheric Radiation Measurement Atmospheric Radiation Measurement Pacific Northwest National Laboratory Pacific Northwest National Laboratory The "other" Washington ARM ARM Atmospheric Radiation Measurement Atmospheric Radiation Measurement Credits to Credits to * Ric Cederwall * Xiquan Dong * Chuck Long * Jay Mace * Mark Miller * Robin Perez * Dave Turner and the rest of the ARM science team * Ric Cederwall * Xiquan Dong * Chuck Long * Jay Mace * Mark Miller * Robin Perez * Dave Turner and the rest of the ARM science team ARM ARM Atmospheric Radiation Measurement Atmospheric Radiation Measurement Outline Outline * A little philosophy

12

Radiation safety and quality control in the cyclotron laboratory  

Science Journals Connector (OSTI)

......and Technical Papers Radiation safety and quality control...Forks, ND 58203, USA Radiation safety was determined to...to save SCADA node software and avoid run failure...prove compliance with radiation safety standards, and minimise......

Sushil Sharma; Gregory Krause; Manuchair Ebadi

2006-07-01T23:59:59.000Z

13

Radiation dose and image quality in K-edge subtraction computed tomography of lung in vivo  

Science Journals Connector (OSTI)

Radiation dose dependency of image quality was showed in in vivo rabbit lung images with and without a contrast agent using the synchrotron-radiation-based K-edge subtraction method. Consistency of the theoretical and measured radiation dose rate values was found.

Strengell, S.

2014-10-01T23:59:59.000Z

14

Atmospheric Radiation Measurement Radiative Atmospheric Divergence...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

radiation emitted by the earth. This instrument is onboard a European Union geostationary weather satellite launched in December 2005; it is collecting data over Niamey and the...

15

Distribution power quality measurement program  

SciTech Connect (OSTI)

This paper describes different facets of a distribution system power quality monitoring program with analysis of data from 222 different sites during the project`s first year. Information regarding the site selection process is provided. Preliminary results for voltage harmonic distortion and sags are presented from the project`s study population of feeders, including the use of novel power quality analysis techniques.

Sabin, D.D.; Grebe, T.E.; Melhorn, C.J. [Electrotek Concepts, Inc., Knoxville, TN (United States); Sundaram, A. [Electric Power Research Inst., Palo Alto, CA (United States)

1995-12-31T23:59:59.000Z

16

Procedure for Generating Data Quality Reports for SIRS Radiometric Measurements  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Procedure for Generating Data Quality Reports Procedure for Generating Data Quality Reports for SIRS Radiometric Measurements M. H. L. Anderberg, F. P. Rael, and T. L. Stoffell National Renewable Energy Laboratory Golden, Colorado Introduction The Atmospheric Radiation Measurement (ARM) Program needs high-quality broadband shortwave (SW) (solar) and longwave (LW) irradiance information for the development and validation of atmospheric circulation and climate models. To this end, the National Renewable Energy Laboratory (NREL) performs a quality assessment of the data from 22 Solar Infrared Stations (SIRS) in the Southern Great Plains (SGP). Data quality reports (DQRs) are instrumental in passing the resultant information to the scientific community. The value of these reports depends on clear and consistent

17

Measurement of radiation impedance of stepped piston radiator  

Science Journals Connector (OSTI)

It was noted in a paper given in 1972 [A. H. Lubell J. Acoust. Soc. Am. 52 1310 (1972)] that the radiation mass of a stepped piston underwater loudspeaker was approximately half of the value expected from simple piston theory. Recently the integral equation approach was used to compute the radiation impedance for the Lubell Laboratories model 98 underwater loudspeaker and new measurements were made. This paper reviews the measurement and data reduction procedures and compares measured and theoretical radiation impedances. The original observation of reduced radiation mass is supported. A companion paper covers the integral equation computation. [This work was supported by Lubell Laboratories Inc.

Alan H. Lubell

1986-01-01T23:59:59.000Z

18

Measurement of solar radiation exergy  

Science Journals Connector (OSTI)

Methods of estimating the energy of solar radiation during it conversion into other forms of energy-thermal, photoelectric, and chemical-during photosynthesis of plants are examined. Analytical expressions are gi...

I. I. Sventitskii; A. P. Grishin

2009-12-01T23:59:59.000Z

19

Atmospheric Radiation Measurement Climate Research Facility | Argonne  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Atmospheric Radiation Measurement Climate Research Facility Atmospheric Radiation Measurement Climate Research Facility Argonne scientists study climate change 1 of 22 Argonne scientists study climate change The U.S. Department of Energy's Office of Science provided $60 million in ARRA funding for climate research to the Atmospheric Radiation Measurement (ARM) Climate Research Facility, a DOE national user facility that has been operating climate observing sites around the world for nearly two decades. These sites help scientists study clouds and their influence on the sun's radiant energy, which heats our planet. Above is one of the purchases: the Vaisala Present Weather Detector. It optically measures visibility, present weather, precipitation intensity, and precipitation type. It provides a measure of current weather conditions by combining measurements from three

20

Lineal energy and radiation quality in radiation therapy: model calculations and comparison with experiment  

Science Journals Connector (OSTI)

Microdosimetry is a recommended method for characterizing radiation quality in situations when the biological effectiveness under test is not well known. In such situations, the radiation beams are described by their lineal energy probability distributions. Results from radiobiological investigations in the beams are then used to establish response functions that relate the lineal energy to the relative biological effectiveness (RBE). In this paper we present the influence of the size of the simulated volume on the relation to the clinical RBE values (or weighting factors). A single event probability distribution of the lineal energy is approximated by its dose average lineal energy () which can be measured or calculated for volumes from a few micrometres down to a few nanometres. The clinical RBE values were approximated as the ratio of the ?-values derived from the LQ-relation. Model calculations are presented and discussed for the SOBP of a 12C ion (290 MeV u?1) and the reference 60Co ? therapy beam. Results were compared with those for a conventional x-ray therapy beam, a 290 MeV proton beam and a neutron therapy beam. It is concluded that for a simulated volume of about 10 nm, the ?-ratio increases approximately linearly with the -ratio for all the investigated beams. The correlation between y and ? provides the evidence to characterize a radiation therapy beam by the lineal energy when, for instance, weighting factors are to be estimated.

L Lindborg; M Hultqvist; Ĺ Carlsson Tedgren; H Nikjoo

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiation measurement quality" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Quality Services: Radiation (New York) | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Radiation (New York) Radiation (New York) Quality Services: Radiation (New York) < Back Eligibility Commercial Industrial Investor-Owned Utility Municipal/Public Utility Utility Program Info State New York Program Type Environmental Regulations Provider NY Department of Environmental Conservation These regulations establish standards for protection against ionizing radiation resulting from the disposal and discharge of radioactive material to the environment. The regulations apply to any person who disposes of or discharges licensed material within the State, or whose loss of control of licensed material may result in the disposal or discharge of such material within the State. The disposal of radioactive tailings or wastes produced by the extraction or concentration of uranium or thorium for any ore

22

Model sensitivity and uncertainty analysis using roadside air quality measurements  

E-Print Network [OSTI]

Model sensitivity and uncertainty analysis using roadside air quality measurements Sotiris, a probabilistic methodology for assessing urban air quality was proposed. Keywords: Air pollution; Model 535265 1. Introduction Mathematical modelling has been widely used for assessing ambient air quality

Paris-Sud XI, Université de

23

Measurement of radiation dose in dental radiology  

Science Journals Connector (OSTI)

......product to effective dose and energy imparted to the patient. Phys...C. A. and Persliden, J. Energy imparted to the patient in diagnostic...factors for determining the energy imparted from measurements of...dental radiology. | Patient dose audit is an important tool for quality......

Ebba Helmrot; Gudrun Alm Carlsson

2005-05-01T23:59:59.000Z

24

Radiation safety and quality assurance in North American dental schools  

SciTech Connect (OSTI)

A survey of North American dental schools revealed that processing quality control and routine maintenance checks on x-ray generators are, in most instances, being carried out in a timely manner. Available methods for reducing patient exposure to ionizing radiation are, however, not being fully implemented. Furthermore, in some instances, dental students are still being exposed to x-rays primarily for teaching purposes.

Farman, A.G.; Hines, V.G.

1986-06-01T23:59:59.000Z

25

Radiation beam calorimetric power measurement system  

DOE Patents [OSTI]

A radiation beam calorimetric power measurement system for measuring the average power of a beam such as a laser beam, including a calorimeter configured to operate over a wide range of coolant flow rates and being cooled by continuously flowing coolant for absorbing light from a laser beam to convert the laser beam energy into heat. The system further includes a flow meter for measuring the coolant flow in the calorimeter and a pair of thermistors for measuring the temperature difference between the coolant inputs and outputs to the calorimeter. The system also includes a microprocessor for processing the measured coolant flow rate and the measured temperature difference to determine the average power of the laser beam.

Baker, John (Livermore, CA); Collins, Leland F. (Pleasanton, CA); Kuklo, Thomas C. (Ripon, CA); Micali, James V. (Dublin, CA)

1992-01-01T23:59:59.000Z

26

Accountability Measures — Using Measurement to Promote Quality Improvement  

Science Journals Connector (OSTI)

...effectiveness to make improved outcomes likely). Organizations that wish to improve their performance record may be tempted to create clever discharge-instruction forms with just the right check-boxes and printed information summaries to satisfy the chart reviewers' rules concerning compliance with the... The authors argue that quality measures in health care should be based on strong evidence that a care process directly improves outcomes, should capture the actual performance of a process, should address a process proximate to the desired outcome, and should not have unintended adverse consequences.

Chassin M.R.Loeb J.M.Schmaltz S.P.Wachter R.M.

2010-08-12T23:59:59.000Z

27

E-Print Network 3.0 - adjusted quality measures Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

quality, software quality measurement, software quality improvement, software quality fundamentals... ;1-2 measurement instruments to allow (or facilitate') the engineering of...

28

Measuring Project Quality Factors Critical to Project Success  

E-Print Network [OSTI]

Measuring Project Quality ­ Factors Critical to Project Success Presented by Thomas Howe P available to measure and track project cost (cheap) and schedule (fast), the measurement and monitoring of project quality (good) is at best underdeveloped. While qualitative measures of project cost and schedule

Calgary, University of

29

Measurements of Relative K Radiative Decay Rates  

Science Journals Connector (OSTI)

Relative radiative decay rates were measured for K-shell vacancies for elements between Z=62 and 92 with a high-resolution Ge(Li) spectrometer. The ratios ?2?1, ?1??1, and ?2??1 (Siegbahn notation) were determined, with ?2?1 significantly higher (4-14%) than those reported by Beckman but in excellent agreement with recent Hartree-Slater calculations of Scofield. The ratios ?1??1 and ?2??1 do not agree with either Beckman's experiment or Scofield's calculations.

P. J. Ebert and V. W. Slivinsky

1969-12-05T23:59:59.000Z

30

Users manual for SERI QC software assessing the quality of solar radiation data  

SciTech Connect (OSTI)

This manual describes the procedures and software for assessing the quality of solar radiation data. This does not constitute quality control because quality control must take place during the preparations for data collection (selection, calibration, and installation of instruments), during the measurement process, and during the transmission (if any) and recording of the numerical values. Once the data are recorded, only quality assessment can be performed. If quality assessment is performed in real time or soon after the measurement process is completed, it can provide input to control the quality of future measurements. Furthermore, quality assessment can be used for quality control if data judged to be bad are deleted and/or modified. We do not subscribe to these actions because the deletion or modification of data destroys information that might be useful to the user. For example, if an instrument has gone through a gradual failure and all of the data that fail quality assessment criteria are deleted or modified, the user of the data may not be able to detect what was happening and will not question the accuracy of other data collected before the instrument completely failed. Therefore, the SERI QC procedures and software do not delete or modify data. Instead, flags are set to inform the user of any departure of the data from expected values. These flags indicate the magnitude and direction of such departures. For the flags to communicate as much information as possible, this manual attempts to identify and explain the probable causes of various flags. However, we cannot overemphasize the following: Flags only indicate that data do or do not fall within expected ranges. This does not mean that the data that the data are or are not valid.

none,

1993-12-01T23:59:59.000Z

31

Posters Cloud Microphysical and Radiative Properties Measured  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

7 7 Posters Cloud Microphysical and Radiative Properties Measured by Combined Lidar, Radar, and Infrared Radiometer W. L. Eberhard and J. M. Intrieri National Oceanic and Atmospheric Administration Environmental Technology Laboratory Boulder, Colorado K. P. Chan and G. Feingold Cooperative Institute for Research in Environmental Sciences Boulder, Colorado also an order of magnitude smaller. These features make simple approximations in scattering calculations adequate for some applications, e.g., Eberhard (1993a). They also provide some unique capabilities, especially the technique described below for measuring drop sizes. One of the four IDP tasks is to characterize cloud signatures obtained by CO 2 lidar. For instance, our earlier work discovered that depolarization from ice particles was almost

32

MEASURING INTERNET TELEPHONY QUALITY: WHERE ARE WE TODAY ?  

E-Print Network [OSTI]

MEASURING INTERNET TELEPHONY QUALITY: WHERE ARE WE TODAY ? Olof Hagsand SICS Sweden Kjell Hanson Ericsson Business Networks Sweden Ian Marsh SICS Sweden Abstract Users of Internet telephony applications demand good quality audio playback. This quality is largely dependent on the instantaneous network

33

Climate monitoring with Earth radiation budget measurements  

Science Journals Connector (OSTI)

The Earth Radiation Budget (ERB) and its geographical distribution is intimately linked with the earth’s climate and with the general circulation. We analyze 10 years of global Clouds and the Earth’s Radiant Energy System (CERES) measurements from 2000 to 2010 and 8 years of diurnally resolved Geostationary Earth Radiation Budget (GERB) from 2004 to 2011 to illustrate this link and to verify if we can detect climate variability or systematic change. In response to the diurnal wave of solar heating three tropical convection maxima exist over South America Africa and around Indonesia. The Indonesian convection maximum is unstable due to a lack of a stabilizing land mass; this is the root cause of the El Ni?o/La Ni?a inter-annual variation with a global pattern of teleconnected variations through the general Walker circulation. Since 2000 a change in global dynamics seems to have occurred. There was a general strengthening of La Ni?a coinciding with a ‘break in global temperature rise’ and with an ‘eastern dimming’ i.e. an increase of aerosols over Asia. There is a resemblance to the period of ‘western dimming’ from 1945 to 1980 and a contrast with the period of global temperature rise and El Ni?o strengthening from 1980 to 2000. It is of paramount importance that the suspected link between the eastern dimming the strengthening of La Ni?a and the break in global temperature rise is thoroughly investigated. This can best be done by a move of a satellite of the Meteosat Second Generation (MSG) series over the Indian Ocean. MSG provides diurnally resolved measurements of the key variables of the ERB clouds and aerosols and of the auxiliary variables of Sea Surface Temperature (SST) and static stability.

2013-01-01T23:59:59.000Z

34

Atmospheric radiation measurement program facilities newsletter, June 2002.  

SciTech Connect (OSTI)

ARM Intensive Operational Period Scheduled to Validate New NASA Satellite--Beginning in July, all three ARM sites (Southern Great Plains [SGP], North Slope of Alaska, and Tropical Western Pacific; Figure 1) will participate in the AIRS Validation IOP. This three-month intensive operational period (IOP) will validate data collected by the satellite-based Atmospheric Infrared Sounder (AIRS) recently launched into space. On May 4, the National Aeronautics and Space Administration (NASA) launched Aqua, the second spacecraft in the Earth Observing System (EOS) series. The EOS satellites monitor Earth systems including land surfaces, oceans, the atmosphere, and ice cover. The first EOS satellite, named Terra, was launched in December 1999. The second EOS satellite is named Aqua because its primary focus is understanding Earth's water cycle through observation of atmospheric moisture, clouds, temperature, ocean surface, precipitation, and soil moisture. One of the instruments aboard Aqua is the AIRS, built by the Jet Propulsion Laboratory, a NASA agency. The AIRS Validation IOP complements the ARM mission to improve understanding of the interactions of clouds and atmospheric moisture with solar radiation and their influence on weather and climate. In support of satellite validation IOP, ARM will launch dedicated radiosondes at all three ARM sites while the Aqua satellite with the AIRS instrument is orbiting overhead. These radiosonde launches will occur 45 minutes and 5 minutes before selected satellite overpasses. In addition, visiting scientists from the Jet Propulsion Laboratory will launch special radiosondes to measure ozone and humidity over the SGP site. All launches will generate ground-truth data to validate satellite data collected simultaneously. Data gathered daily by ARM meteorological and solar radiation instruments will complete the validation data sets. Data from Aqua-based instruments, including AIRS, will aid in weather forecasting, climate modeling, and greenhouse gas studies. These instruments will provide more accurate, detailed global observations of weather and atmospheric parameters that will, in turn, improve the accuracy and quality of weather forecasts. A satellite-based instrument is cost-effective because it can provide continuous global measurements, eliminating isolated yet costly weather balloon releases. Aqua, launched from Vandenberg Air Force Base in California (Figure 2), carries six state-of-the-art instruments that measure various water vapor parameters: (1) AIRS, which measures atmospheric temperature and humidity, land and sea surface temperatures, cloud properties, and radiative energy flux; (2) Advanced Microwave Sounding Unit, which measures atmospheric temperature and humidity during both cloudy and cloud-free periods; (3) Advanced Microwave Scanning Radiometer, which measures cloud properties, radiative energy flux, precipitation rates, land surface wetness, sea ice, snow cover, sea surface temperature, and wind fields; (4) Clouds and the Earth's Radiant Energy System, which measures radiative energy flux; (5) Humidity Sounder for Brazil, which measures atmospheric humidity by using a passive scanning microwave radiometer; and (6) Moderate Resolution Imaging Spectroradiometer, which measures cloud properties, radiative energy flux, aerosol properties, land cover and land use change, vegetation dynamics, land surface temperature, fire occurrence, volcanic effects, sea surface temperature, ocean color, snow cover, atmospheric temperature and humidity, and sea ice. The data-gathering capabilities of the Aqua instruments will provide an unprecedented view of atmosphere-land interactions (Figure 3). The availability of more frequent, more accurate global measurements of important atmospheric parameters will both improve our capabilities for short-term weather forecasting and lead to a better understanding of climate variability and climate change. Simultaneous measurements of many parameters will allow scientists to study complicated forcings and feedbacks of the atmosphere, which can be

Holdridge, D. J.

2002-07-03T23:59:59.000Z

35

MEASURING IMAGES: DIFFERENCES, QUALITY AND Garrett M. Johnson  

E-Print Network [OSTI]

MEASURING IMAGES: DIFFERENCES, QUALITY AND APPEARANCE Garrett M. Johnson M.S. Color Science (1998 The Ph.D. Degree Dissertation of Garrett M. Johnson has been examined and approved by the dissertation of Thesis: MEASURING IMAGES: DIFFERENCES, QUALITY, AND APPEARANCE I, Garrett M. Johnson, hereby grant

Zanibbi, Richard

36

Radiation measurements with heat-proof polyethylene terephthalate bottles  

Science Journals Connector (OSTI)

...1009 145 1006 55 Radiation measurements with...Chiba-263-8555, Japan 2 Hiroshima University...Photonics K.K., Japan) connected with...evaluation of a radiation detector because...be used to detect radiation in place of the...Chemicals Inc., Japan). Since the PET...

2010-01-01T23:59:59.000Z

37

Automotive Component Measurements forAutomotive Component Measurements for Determining VehicleDetermining Vehicle--Level RadiatedLevel Radiated  

E-Print Network [OSTI]

1 Automotive Component Measurements forAutomotive Component Measurements for Determining VehicleDetermining Vehicle--Level RadiatedLevel Radiated Automotive Component Measurements forAutomotive ComponentEmissionsEmissionsEmissions Todd Hubing Mi h li P f f V hi l El t iMichelin Professor of Vehicular Electronics Clemson University

Stuart, Steven J.

38

Style Guide Atmospheric Radiation Measurement (ARM) Climate Research Facility  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Style Guide Style Guide Atmospheric Radiation Measurement (ARM) Climate Research Facility March 2013 Style Guide Atmospheric Radiation Measurement Climate Research Facility March 2013 Work supported by the U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research March 2013 ii Contents 1.0 Introduction .......................................................................................................................................... 1 2.0 Acronyms and Abbreviations ............................................................................................................... 1 2.1 Usage ............................................................................................................................................ 1

39

Using Wood Quality Measures to Evaluate Second-Growth Redwood  

E-Print Network [OSTI]

553 Using Wood Quality Measures to Evaluate Second-Growth Redwood Stephen L. Quarles1 and Yana stability, durability, microfibril angle, redwood, wood quality Introduction Redwood has long been a valued" or "resistant or very resistant" (Wood Handbook 1999). 1 University of California Cooperative Extension (Advisor

Standiford, Richard B.

40

Quality management system in the CIEMAT Radiation Dosimetry Service  

Science Journals Connector (OSTI)

......for technical services in radiation safety. (2008) IAEA. Safety Guide, No. GS-G-3...protection against ionizing radiation. (2001) 27284-27393...Publication 103. ICRP. 9 Certool Software. AENOR. http://www......

R. Martín; T. Navarro; A. M. Romero; M. A. López

2011-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiation measurement quality" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Measurements - Ion Beams - Radiation Effects Facility / Cyclotron...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Ion Beams Available Beams Beam Change Times Measurements Useful Graphs Measurements The beam uniformity and flux are determined using an array of five detectors. Each...

42

Measuring plasma turbulence using low coherence microwave radiation  

SciTech Connect (OSTI)

Low coherence backscattering (LCBS) is a proposed diagnostic technique for measuring plasma turbulence and fluctuations. LCBS is an adaptation of optical coherence tomography, a biomedical imaging technique. Calculations and simulations show LCBS measurements can achieve centimeter-scale spatial resolution using low coherence microwave radiation. LCBS measurements exhibit several advantages over standard plasma turbulence measurement techniques including immunity to spurious reflections and measurement access in hollow density profiles. Also, LCBS is scalable for 1-D profile measurements and 2-D turbulence imaging.

Smith, D. R. [Department of Engineering Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706 (United States)

2012-02-20T23:59:59.000Z

43

Radiation dose measurement in gastrointestinal studies  

Science Journals Connector (OSTI)

......Technology, PO Box 1908, Khartoum, Sudan 2 Medical Physics Department...has been limited up to now in Sudan. DRL for barium studies have...All the TLD chips had the same thermal history. The calibration cycle...quality control tests performed by Sudan Atomic Energy Commission. Investigation......

A. Sulieman; M. Elzaki; C. Kappas; K. Theodorou

2011-09-01T23:59:59.000Z

44

Experimental determination of the radiation quality factor near high-energy accelerators  

Science Journals Connector (OSTI)

Experimental data characterizing the effective quality factor QF of multicomponent pulse radiation in ... are compared with values determined for other high-energy accelerators. Values of QF obtained in experimen...

V. N. Lebedev; M. Zel'chinskii; M. I. Salatskaya

1966-05-01T23:59:59.000Z

45

Sound radiation measurement with nearfield holography  

Science Journals Connector (OSTI)

With holography an entire 3D wave field can be reconstructed from data obtained on a single 2D surface. Such high information content has made holography a powerful research tool and useful extensions from its original optical domain to other wave fields such as sound have naturally been pursued. However it has usually been assumed that the resolution of a holographicreconstruction is limited by the wavelength of the radiation; this limitation severely diminishes the usefulness of holography for sound fields when the wavelengths are many times larger than the objects to be imaged. We have developed a new technique called nearfield holography which eliminates the wavelength resolution limit and in addition permits a determination of: (1) the complete sound pressure and particle velocity fields produced by the source; (2) the mode of vibration of the surfaces of the source; (3) the vector intensity field (showing flow of acoustic energy) around the source; (4) the farfield directivity pattern; (5) the total power radiated into a half?space. A particularly interesting application of nearfield holography occurs in the study of sound radiation from musical instruments. [Work supported by ONR.

J. D. Maynard; E. G. Williams

1982-01-01T23:59:59.000Z

46

Nuclear radiation-warning detector that measures impedance  

DOE Patents [OSTI]

This invention is a nuclear radiation-warning detector that measures impedance of silver-silver halide on an interdigitated electrode to detect light or radiation comprised of alpha particles, beta particles, gamma rays, X rays, and/or neutrons. The detector is comprised of an interdigitated electrode covered by a layer of silver halide. After exposure to alpha particles, beta particles, X rays, gamma rays, neutron radiation, or light, the silver halide is reduced to silver in the presence of a reducing solution. The change from the high electrical resistance (impedance) of silver halide to the low resistance of silver provides the radiation warning that detected radiation levels exceed a predetermined radiation dose threshold.

Savignac, Noel Felix; Gomez, Leo S; Yelton, William Graham; Robinson, Alex; Limmer, Steven

2013-06-04T23:59:59.000Z

47

An Instrumentation Complex for Atmospheric Radiation Measurements in Siberia  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Instrumentation Complex for Atmospheric Radiation Instrumentation Complex for Atmospheric Radiation Measurements in Siberia S. M. Sakerin, F. V. Dorofeev, D. M. Kabanov, V. S. Kozlov, M. V. Panchenko, Yu. A. Pkhalagov, V. V. Polkin, V. P. Shmargunov, S. A. Terpugova, S. A. Turchinovich, and V. N. Uzhegov Institute of Atmospheric Optics Tomsk, Russia Introduction The instrumentation complex is described, which has been prepared for radiative experiments in the region of Tomsk (West Siberia). The complex consists of three groups of devices to measure (a) the characteristics of the total downward radiation; (b) the most variable components of the atmospheric transparency directly affecting the income of radiation (aerosol optical depth [AOD], total content of water vapor, ozone, etc.); and (c) aerosol and meteorological parameters of the near-ground layer of the

48

Thunderhead Radiation Measurements and Radiative Flux Analysis in Support of STORMVEX  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Thunderhead Radiation Thunderhead Radiation Measurements and Radiative Flux Analysis in Support of STORMVEX Chuck Long Jay Mace Intent * Provide downwelling broadband radiation measurements at Thunderhead * Physically small footprint portable system * Designed to provide inputs necessary for Radiative Flux Analysis Basic RFA System COPS Hornisgrinde Deployment 1200m elevation System Components * Eppley ventilated PSP * Eppley ventilated PIR * Delta-T SPN-1 * Vaisala HMP-50 T/RH probe * Campbell CR23X datalogger SPN-1 Radiometer * Uses 7 thermopile detectors and a patented shading pattern * Measures Total and Diffuse SW with no moving parts * Includes internal heaters Relative accuracy StDev = 13.6 Winter Mountain Deployment Frost/Snow Mitigation * NSA Heated Ventilator Evaluation IOP - Testing various configurations and

49

Optimization and quality assurance of an image-guided radiation therapy system for intensity-modulated radiation therapy radiotherapy  

SciTech Connect (OSTI)

To develop a quality assurance (QA) of XVI cone beam system (XVIcbs) for its optimal imaging-guided radiotherapy (IGRT) implementation, and to construe prostate tumor margin required for intensity-modulated radiation therapy (IMRT) if IGRT is unavailable. XVIcbs spatial accuracy was explored with a humanoid phantom; isodose conformity to lesion target with a rice phantom housing a soap as target; image resolution with a diagnostic phantom; and exposure validation with a Radcal ion chamber. To optimize XVIcbs, rotation flexmap on coincidency between gantry rotational axis and that of XVI cone beam scan was investigated. Theoretic correlation to image quality of XVIcbs rotational axis stability was elaborately studied. Comprehensive QA of IGRT using XVIcbs has initially been explored and then implemented on our general IMRT treatments, and on special IMRT radiotherapies such as head and neck (H and N), stereotactic radiation therapy (SRT), stereotactic radiosurgery (SRS), and stereotactic body radiotherapy (SBRT). Fifteen examples of prostate setup accounted for 350 IGRT cone beam system were analyzed. IGRT accuracy results were in agreement {+-} 1 mm. Flexmap 0.25 mm met the manufacturer's specification. Films confirmed isodose coincidence with target (soap) via XVIcbs, otherwise not. Superficial doses were measured from 7.2-2.5 cGy for anatomic diameters 15-33 cm, respectively. Image quality was susceptible to rotational stability or patient movement. IGRT using XVIcbs on general IMRT treatments such as prostate, SRT, SRS, and SBRT for setup accuracy were verified; and subsequently coordinate shifts corrections were recorded. The 350 prostate IGRT coordinate shifts modeled to Gaussian distributions show central peaks deviated off the isocenter by 0.6 {+-} 3.0 mm, 0.5 {+-} 4.5 mm in the X(RL)- and Z(SI)-coordinates, respectively; and 2.0 {+-} 3.0 mm in the Y(AP)-coordinate as a result of belly and bladder capacity variations. Sixty-eight percent of confidence was within {+-} 4.5 mm coordinates shifting. IGRT using XVIcbs is critical to IMRT for prostate and H and N, especially SRT, SRS, and SBRT. To optimize this modality of IGRT, a vigilant QA program is indispensable. Prostate IGRT reveals treatment accuracy as subject to coordinates' adjustments; otherwise a 4.5-mm margin is required to allow for full dose coverage of the clinical target volume, notwithstanding toxicity to normal tissues.

Tsai, Jen-San, E-mail: jen-san.tsai@verizon.net [Department of Radiation Oncology, Temple University Hospital, Philadelphia, PA (United States); Micaily, Bizhan; Miyamoto, Curtis [Department of Radiation Oncology, Temple University Hospital, Philadelphia, PA (United States)

2012-10-01T23:59:59.000Z

50

Techniques for radiation measurements: microdosimetry and dosimetry  

Science Journals Connector (OSTI)

......neutron capture therapy(25) using a pair of matched miniature TEPCs where the wall of one of the counters is loaded with Boron-10. Subtraction of the two measured microdosimetric spectra reveals the enhanced dose achieved by boron capture. In this......

A. J. Waker

2006-12-01T23:59:59.000Z

51

Cosmic Radiation Measurements in Airline Service  

Science Journals Connector (OSTI)

......of 38.9 µSv whereas the CARI 3Q programme gives a route dose of 32.5 µSv. Measurements have also been performed on the Boeing 747-400 aircraft on the high latitude ultralonghaul direct London-Tokyo flight and these give values in the region of 6......

M. Bagshaw

1999-12-01T23:59:59.000Z

52

Journal of Computing in Civil Engineering Centrality Inspired Quality Measures for Network Based Schedules  

E-Print Network [OSTI]

Journal of Computing in Civil Engineering Centrality Inspired Quality Measures for Network Based Schedules --Manuscript Draft-- Manuscript Number: Full Title: Centrality Inspired Quality Measures quality under the premise that more complex schedules would require additional coordination efforts

de Leon, Alex R.

53

Method and apparatus for measuring spatial uniformity of radiation  

DOE Patents [OSTI]

A method and apparatus for measuring the spatial uniformity of the intensity of a radiation beam from a radiation source based on a single sampling time and/or a single pulse of radiation. The measuring apparatus includes a plurality of radiation detectors positioned on planar mounting plate to form a radiation receiving area that has a shape and size approximating the size and shape of the cross section of the radiation beam. The detectors concurrently receive portions of the radiation beam and transmit electrical signals representative of the intensity of impinging radiation to a signal processor circuit connected to each of the detectors and adapted to concurrently receive the electrical signals from the detectors and process with a central processing unit (CPU) the signals to determine intensities of the radiation impinging at each detector location. The CPU displays the determined intensities and relative intensity values corresponding to each detector location to an operator of the measuring apparatus on an included data display device. Concurrent sampling of each detector is achieved by connecting to each detector a sample and hold circuit that is configured to track the signal and store it upon receipt of a "capture" signal. A switching device then selectively retrieves the signals and transmits the signals to the CPU through a single analog to digital (A/D) converter. The "capture" signal. is then removed from the sample-and-hold circuits. Alternatively, concurrent sampling is achieved by providing an A/D converter for each detector, each of which transmits a corresponding digital signal to the CPU. The sampling or reading of the detector signals can be controlled by the CPU or level-detection and timing circuit.

Field, Halden (Boulder, CO)

2002-01-01T23:59:59.000Z

54

Atmospheric Radiation Measurement Climate Research Facility (ACRF) Annual Report 2008  

SciTech Connect (OSTI)

The Importance of Clouds and Radiation for Climate Change: The Earth’s surface temperature is determined by the balance between incoming solar radiation and thermal (or infrared) radiation emitted by the Earth back to space. Changes in atmospheric composition, including greenhouse gases, clouds, and aerosols, can alter this balance and produce significant climate change. Global climate models (GCMs) are the primary tool for quantifying future climate change; however, there remain significant uncertainties in the GCM treatment of clouds, aerosol, and their effects on the Earth’s energy balance. In 1989, the U.S. Department of Energy (DOE) Office of Science created the Atmospheric Radiation Measurement (ARM) Program to address scientific uncertainties related to global climate change, with a specific focus on the crucial role of clouds and their influence on the transfer of radiation in the atmosphere. To reduce these scientific uncertainties, the ARM Program uses a unique twopronged approach: • The ARM Climate Research Facility, a scientific user facility for obtaining long-term measurements of radiative fluxes, cloud and aerosol properties, and related atmospheric characteristics in diverse climate regimes; and • The ARM Science Program, focused on the analysis of ACRF and other data to address climate science issues associated with clouds, aerosols, and radiation, and to improve GCMs. This report provides an overview of each of these components and a sample of achievements for each in fiscal year (FY) 2008.

LR Roeder

2008-12-01T23:59:59.000Z

55

Temperature measurements using multicolor pyrometry in thermal radiation heating environments  

SciTech Connect (OSTI)

Temperature measurements are important for thermal-structural experiments in the thermal radiation heating environments such as used for thermal-structural stress analyses. This paper describes the use of multicolor pyrometry for the measurements of diffuse surfaces in thermal radiation environments that eliminates the effects of background radiation reflections and unknown emissivities based on a least-squares algorithm. The near-infrared multicolor pyrometer had a spectral range of 1100–2400 nm, spectrum resolution of 6 nm, maximum sampling frequency of 2 kHz, working distance of 0.6 m to infinity, temperature range of 700–1700 K. The pyrometer wavelength response, nonlinear intensity response, and spectral response were all calibrated. The temperature of a graphite sample irradiated by quartz lamps was then measured during heating and cooling using the least-squares algorithm based on the calibrated irradiation data. The experiments show that higher temperatures and longer wavelengths are more suitable for the thermal measurements in the quartz lamp radiation heating system. This analysis provides a valuable method for temperature measurements of diffuse surfaces in thermal radiation environments.

Fu, Tairan, E-mail: trfu@mail.tsinghua.edu.cn [Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084 (China) [Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084 (China); Beijing Key Laboratory of CO2 Utilization and Reduction Technology, Beijing 100084 (China); Liu, Jiangfan; Duan, Minghao; Zong, Anzhou [Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084 (China)] [Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084 (China)

2014-04-15T23:59:59.000Z

56

Atmospheric Radiation Measurement (ARM) Climate Research Facility and Atmospheric  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Atmospheric Radiation Measurement (ARM) Atmospheric Radiation Measurement (ARM) Climate Research Facility and Atmospheric System Research (ASR) Science and Infrastructure Steering Committee CHARTER June 2012 DISCLAIMER This report was prepared as an account of work sponsored by the U.S. Government. Neither the United States nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not

57

INDOOR AIR QUALITY MEASUREMENTS IN ENERGY EFFICIENT BUILDINGS  

E-Print Network [OSTI]

of Engineering, Coordinating Committee of Air QualityStandards: Air Quality and Automobile Emission Control, Vol.of ilitrogen Dioxide Air Quality Standards. Paper tlo. 76-

Hollowell, C.D.

2011-01-01T23:59:59.000Z

58

Measurement of parameters in Indus-2 synchrotron radiation source  

SciTech Connect (OSTI)

The paper presents the measurement of optics parameters in Indus-2 synchrotron radiation source, which include betatron tune, beta function, dispersion function, natural chromaticity, corrected chromaticity, central RF frequency, momentum compaction factor, and linear betatron coupling. Two methods were used for beta function measurement; a conventional quadrupole scan method and a method using the fitting of the orbit response matrix. A robust Levenberg-Marquardt algorithm was used for nonlinear least square fitting of the orbit response matrix. In this paper, detailed methods for the parameter measurements are described. The measured results are discussed and compared with the theoretical values obtained using accelerator simulation code Accelerator Toolbox in MATLAB.

Ghodke, A. D.; Husain, Riyasat; Kumar, Pradeep; Yadav, Surendra; Puntambekar, T. A. [Raja Ramanna Centre for Advanced Technology, 452013, Indore (India)

2012-10-15T23:59:59.000Z

59

Lens transmission measurement for an absolute radiation thermometer  

SciTech Connect (OSTI)

The lens transmission for the National Institute of Metrology of China absolute radiation thermometer is measured by a hybrid method. The results of the lens transmission measurements are 99.002% and 86.792% for filter radiometers with center wavelengths 633 nm and 900 nm, respectively. These results, after correcting for diffraction factors and the size-of-source effect when the lens is incorporated within the radiometer, can be used for measurement of thermodynamic temperature. The expanded uncertainty of the lens transmission measurement system has been evaluated. It is 1.3×10{sup ?3} at 633 nm and 900 nm, respectively.

Hao, X.; Yuan, Z.; Lu, X. [Division of Thermometry and Materials Evaluation, National Institute of Metrology, Beijing (China)] [Division of Thermometry and Materials Evaluation, National Institute of Metrology, Beijing (China)

2013-09-11T23:59:59.000Z

60

A quantitative method for measuring the quality of history matches  

SciTech Connect (OSTI)

History matching can be an efficient tool for reservoir characterization. A {open_quotes}good{close_quotes} history matching job can generate reliable reservoir parameters. However, reservoir engineers are often frustrated when they try to select a {open_quotes}better{close_quotes} match from a series of history matching runs. Without a quantitative measurement, it is always difficult to tell the difference between a {open_quotes}good{close_quotes} and a {open_quotes}better{close_quotes} matches. For this reason, we need a quantitative method for testing the quality of matches. This paper presents a method for such a purpose. The method uses three statistical indices to (1) test shape conformity, (2) examine bias errors, and (3) measure magnitude of deviation. The shape conformity test insures that the shape of a simulated curve matches that of a historical curve. Examining bias errors assures that model reservoir parameters have been calibrated to that of a real reservoir. Measuring the magnitude of deviation assures that the difference between the model and the real reservoir parameters is minimized. The method was first tested on a hypothetical model and then applied to published field studies. The results showed that the method can efficiently measure the quality of matches. It also showed that the method can serve as a diagnostic tool for calibrating reservoir parameters during history matching.

Shaw, T.S. [Kerr-McGee Corp., Oklahoma City, OK (United States); Knapp, R.M. [Univ. of Oklahoma, Norman, OK (United States)

1997-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiation measurement quality" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Probing Radiation Damage in Plutonium Alloys with Multiple Measurement Techniques  

SciTech Connect (OSTI)

A material subjected to radiation damage will usually experience changes in its physical properties. Measuring these changes in the physical properties provides a basis to study radiation damage in a material which is important for a variety of real world applications from reactor materials to semiconducting devices. When investigating radiation damage, the relative sensitivity of any given property can vary considerably based on the concentration and type of damage present as well as external parameters such as the temperature and starting material composition. By measuring multiple physical properties, these differing sensitivities can be leveraged to provide greater insight into the different aspects of radiation damage accumulation, thereby providing a broader understanding of the mechanisms involved. In this report, self-damage from {alpha}-particle decay in Pu is investigated by measuring two different properties: magnetic susceptibility and resistivity. The results suggest that while the first annealing stage obeys second order chemical kinetics, the primary mechanism is not the recombination of vacancy-interstitial close pairs.

McCall, S K; Fluss, M J; Chung, B W

2010-04-21T23:59:59.000Z

62

Posters Objective Analysis Schemes to Monitor Atmospheric Radiation Measurement Data in Near Real-Time  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

7 7 Posters Objective Analysis Schemes to Monitor Atmospheric Radiation Measurement Data in Near Real-Time M. Splitt University of Oklahoma Norman, Oklahoma Recent work in this area by Charles Wade (1987) lays out the groundwork for monitoring data quality for projects with large networks of instruments such as the Atmospheric Radiation Measurement (ARM) Program. Wade generated objectively analyzed fields of meteorological variables (temperature, pressure, humidity, and wind) and then compared the objectively analyzed value at the sensor location with the value produced by the sensor. Wade used a Barne's objective analysis scheme to produce objective data values for a given meteorological variable (q) in two- dimensional space. The objectively analyzed value should

63

Design of a differential radiometer for atmospheric radiative flux measurements  

SciTech Connect (OSTI)

The Hemispherical Optimized NEt Radiometer (HONER) is an instrument under development at the Los Alamos National Laboratory for deployment on an unmanned aerospace vehicle as part of the Atmospheric Radiation Measurements (ARM/UAV) program. HONER is a differential radiometer which will measure the difference between the total upwelling and downwelling fluxes and is intended to provide a means of measuring the atmospheric radiative flux divergence. Unlike existing instruments which measure the upwelling and downwelling fluxes separately, HONER will achieve an optical difference by chopping the two fluxes alternately onto a common pyroelectric detector. HONER will provide data resolved into two spectral bands; one covering the solar dominated region from less than 0.4 micrometer to approximately 4.5 micrometers and the other covering the region from approximately 4.5 micrometers to greater than 50 micrometers, dominated by thermal radiation. The means of separating the spectral regions guarantees seamless summation to calculate the total flux. The fields-of-view are near-hemispherical, upward and downward. The instrument can be converted, in flight, from the differential mode to absolute mode, measuring the upwelling and downwelling fluxes separately and simultaneously. The instrument also features continuous calibration from on-board sources. We will describe the design and operation of the sensor head and the on-board reference sources as well as the means of deployment.

LaDelfe, P.C.; Weber, P.G.; Rodriguez, C.W.

1994-11-01T23:59:59.000Z

64

Microbiological, chemical, and sensory quality changes in Pico de gallo as affected by gamma radiation  

E-Print Network [OSTI]

This study was undertaken to gain a greater understanding of the effects of gamma radiation and storage at 2'C on the microbiological, sensorial and chemical quality of pico de gallo. Samples of pico de gallo were exposed to cobalt'o at a dose of I...

Miller, Gerald Howard

1994-01-01T23:59:59.000Z

65

A New Low-Cost Measurement Platform for Urea Quality Monitoring...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

A New Low-Cost Measurement Platform for Urea Quality Monitoring A New Low-Cost Measurement Platform for Urea Quality Monitoring This technique can use specifications for urea...

66

Borehole logging for uranium by measurement of natural ?-radiation  

Science Journals Connector (OSTI)

?-Ray measurements have been made in boreholes since 1939, for the purpose of detecting the radiation from naturally occuring radioelements in rocks. Logs of the ?-radiation in boreholes have evolved to their present acceptance as a quantitative measurement of uranium concentration for uranium exploration and mining development projects. Many factors influence these ?-ray measurements and consequently new methods of overcoming previous problems have had to be developed. Calibration facilities with model holes have been established in several countries to support quantitative borehole measurements. New high density detector materials have been evaluated and have shown to yield considerable improvements for operation in the restricted environment of the borehole. ?-Ray spectral logging has become available partially as a result of spin-off from parallel developments in surface and airborne ?-ray spectrometric survey equipment. The use of the high resolution solid state detector has proceeded through a series of developments to its present availability as a commercial borehole logging service in spite of the inherent detector cooling problems. Digital measurements are replacing the earlier analog measurements, and minicomputer- or micro processor-based logging systems have enabled new data processing techniques such as inverse filtering, to be implemented in real time at the site of the borehole.

P.G. Killeen

1983-01-01T23:59:59.000Z

67

Cumulative sum quality control for calibrated breast density measurements  

SciTech Connect (OSTI)

Purpose: Breast density is a significant breast cancer risk factor. Although various methods are used to estimate breast density, there is no standard measurement for this important factor. The authors are developing a breast density standardization method for use in full field digital mammography (FFDM). The approach calibrates for interpatient acquisition technique differences. The calibration produces a normalized breast density pixel value scale. The method relies on first generating a baseline (BL) calibration dataset, which required extensive phantom imaging. Standardizing prospective mammograms with calibration data generated in the past could introduce unanticipated error in the standardized output if the calibration dataset is no longer valid. Methods: Sample points from the BL calibration dataset were imaged approximately biweekly over an extended timeframe. These serial samples were used to evaluate the BL dataset reproducibility and quantify the serial calibration accuracy. The cumulative sum (Cusum) quality control method was used to evaluate the serial sampling. Results: There is considerable drift in the serial sample points from the BL calibration dataset that is x-ray beam dependent. Systematic deviation from the BL dataset caused significant calibration errors. This system drift was not captured with routine system quality control measures. Cusum analysis indicated that the drift is a sign of system wear and eventual x-ray tube failure. Conclusions: The BL calibration dataset must be monitored and periodically updated, when necessary, to account for sustained system variations to maintain the calibration accuracy.

Heine, John J.; Cao Ke; Beam, Craig [Cancer Prevention and Control Division, Moffitt Cancer Center, 12902 Magnolia Drive, Tampa, Florida 33612 (United States); Division of Epidemiology and Biostatistics, School of Public Health, University of Illinois at Chicago, 1603 W. Taylor St., Chicago, Illinois 60612 (United States)

2009-12-15T23:59:59.000Z

68

Measurements of prompt radiation induced conductivity of Kapton.  

SciTech Connect (OSTI)

We performed measurements of the prompt radiation induced conductivity in thin samples of Kapton (polyimide) at the Little Mountain Medusa LINAC facility in Ogden, UT. Three mil samples were irradiated with a 0.5 {mu}s pulse of 20 MeV electrons, yielding dose rates of 1E9 to 1E10 rad/s. We applied variable potentials up to 2 kV across the samples and measured the prompt conduction current. Analysis rendered prompt conductivity coefficients between 6E-17 and 2E-16 mhos/m per rad/s, depending on the dose rate and the pulse width.

Preston, Eric F. (ITT Corporation, Colorado Springs, CO); Zarick, Thomas Andrew; Sheridan, Timothy J.; Hartman, E. Frederick; Stringer, Thomas Arthur (ITT Corporation, Colorado Springs, CO)

2010-10-01T23:59:59.000Z

69

Contextual Injection of Quality Measures into Software Engineering Processes Gregor Grambow and Roy Oberhauser  

E-Print Network [OSTI]

Contextual Injection of Quality Measures into Software Engineering Processes Gregor Grambow and Roy situationally-determined quality measure proposals into the concrete workflows of software engineers, using the feasibility of the approach for automatically providing timely quality measure guidance to software engineers

Pfeifer, Holger

70

An Approach for QoS Measurements in IP Multicast Networks MQM -Multicast Quality Monitor  

E-Print Network [OSTI]

An Approach for QoS Measurements in IP Multicast Networks MQM - Multicast Quality Monitor Falko@acm.org Abstract MQM - Multicast Quality Monitor represents a new approach to measure QoS within an IP multicast which builds a very basis for the measurements. Keywords IP Multicast, Quality of Service, IP

Breu, Ruth

71

Science Plan for the Atmospheric Radiation Measurement Program (ARM)  

SciTech Connect (OSTI)

The purpose of this Atmospheric Radiation Measurement (ARM) Science Plan is to articulate the scientific issues driving the ARM Program, and to relate them to DOE`s programmatic objectives for ARM, based on the experience and scientific progress gained over the past five years. ARM programmatic objectives are to: (1) Relate observed radiative fluxes and radiances in the atmosphere, spectrally resolved and as a function of position and time, to the temperature and composition of the atmosphere, specifically including water vapor and clouds, and to surface properties, and sample sufficient variety of situations so as to span a wide range of climatologically relevant possibilities; (2) develop and test parameterizations that can be used to accurately predict the radiative properties and to model the radiative interactions involving water vapor and clouds within the atmosphere, with the objective of incorporating these parameterizations into general circulation models. The primary observational methods remote sending and other observations at the surface, particularly remote sensing of clouds, water vapor and aerosols.

NONE

1996-02-01T23:59:59.000Z

72

Atmospheric radiation measurement: A program for improving radiative forcing and feedback in general circulation models  

SciTech Connect (OSTI)

The Atmospheric Radiation Measurement (ARM) Program is a key element of the Department of Energy`s (DOE`s) global change research strategy. ARM represents a long-term commitment to conduct comprehensive studies of the spectral atmospheric radiative energy balance profile for a wide range of cloud conditions and surface types, and to develop the knowledge necessary to improve parameterizations of radiative processes under various cloud regimes for use in general circulation models (GCMs) and related models. The importance of the ARM program is a apparent from the results of model assessments of the impact on global climate change. Recent studies suggest that radiatively active trace gas emissions caused by human activity can lead to a global warming of 1.5 to 4.5 degrees Celsius and to important changes in water availability during the next century (Cess, et al. 1989). These broad-scale changes can be even more significant at regional levels, where large shifts in temperature and precipitation patterns are shown to occur. However, these analyses also indicate that considerable uncertainty exists in these estimates, with the manner in which cloud radiative processes are parameterized among the most significant uncertainty. Thus, although the findings have significant policy implications in assessment of global and regional climate change, their uncertainties greatly influence the policy debate. ARM`s highly focused observational and analytical research is intended to accelerate improvements and reduce key uncertainties associated with the way in which GCMs treat cloud cover and cloud characteristics and the resulting radiative forcing. This paper summarizes the scientific context for ARM, ARM`s experimental approach, and recent activities within the ARM program.

Patrinos, A.A. [USDOE, Washington, DC (United States); Renne, D.S.; Stokes, G.M. [Pacific Northwest Lab., Richland, WA (United States); Ellingson, R.G. [Maryland Univ., College Park, MD (United States)

1991-01-01T23:59:59.000Z

73

Atmospheric radiation measurement: A program for improving radiative forcing and feedback in general circulation models  

SciTech Connect (OSTI)

The Atmospheric Radiation Measurement (ARM) Program is a key element of the Department of Energy's (DOE's) global change research strategy. ARM represents a long-term commitment to conduct comprehensive studies of the spectral atmospheric radiative energy balance profile for a wide range of cloud conditions and surface types, and to develop the knowledge necessary to improve parameterizations of radiative processes under various cloud regimes for use in general circulation models (GCMs) and related models. The importance of the ARM program is a apparent from the results of model assessments of the impact on global climate change. Recent studies suggest that radiatively active trace gas emissions caused by human activity can lead to a global warming of 1.5 to 4.5 degrees Celsius and to important changes in water availability during the next century (Cess, et al. 1989). These broad-scale changes can be even more significant at regional levels, where large shifts in temperature and precipitation patterns are shown to occur. However, these analyses also indicate that considerable uncertainty exists in these estimates, with the manner in which cloud radiative processes are parameterized among the most significant uncertainty. Thus, although the findings have significant policy implications in assessment of global and regional climate change, their uncertainties greatly influence the policy debate. ARM's highly focused observational and analytical research is intended to accelerate improvements and reduce key uncertainties associated with the way in which GCMs treat cloud cover and cloud characteristics and the resulting radiative forcing. This paper summarizes the scientific context for ARM, ARM's experimental approach, and recent activities within the ARM program.

Patrinos, A.A. (USDOE, Washington, DC (United States)); Renne, D.S.; Stokes, G.M. (Pacific Northwest Lab., Richland, WA (United States)); Ellingson, R.G. (Maryland Univ., College Park, MD (United States))

1991-01-01T23:59:59.000Z

74

Atmospheric Radiation Measurement Tropical Warm Pool International Cloud Experiment  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Tropical Warm Pool Tropical Warm Pool International Cloud Experiment General Description The Tropical Warm Pool - International Cloud Experiment (TWP-ICE) was a collaborative effort led by the U.S. Department of Energy's Atmospheric Radiation Measurement (ARM) Program and the Australian Bureau of Meteorology. Beginning January 21 and ending February 14, 2006, the experiment was conducted in the region near the ARM Climate Research Facility in Darwin, Northern Australia. This permanent facility is fully equipped with sophisticated instruments for measuring cloud and other atmospheric properties to provide a long-term record of continuous observational data. Measurements obtained from the other experiment components (explained below) will complement this dataset to provide a detailed description of the tropical atmosphere.

75

Surface summertime radiative forcing by shallow cumuli at the Atmospheric Radiation Measurement Southern Great Plains site  

SciTech Connect (OSTI)

Although shallow cumuli are common over large areas of the globe, their impact on the surface radiative forcing has not been carefully evaluated. This study addresses this shortcoming by analyzing data from days with shallow cumuli collected over eight summers (2000-2007) at the U.S. Department of Energy Atmospheric Radiation Measurement (ARM) Climate Research Facility (collectively ACRF) Southern Great Plains site. During periods with clouds, the average shortwave and longwave radiative forcings are 45.5 W m-2 and +11.6 W m-2, respectively. The forcing has been defined so that a negative (positive) forcing indicates a surface cooling (warming). On average, the shortwave forcing is negative, however, instances with positive shortwave forcing are observed approximately 20% of the time. These positive values of shortwave forcing are associated with three-dimensional radiative effects of the clouds. The three-dimensional effects are shown to be largest for intermediate cloud amounts. The magnitude of the three-dimensional effects decreased with averaging time, but it is not negligibly small even for large averaging times as long as four hours.

Berg, Larry K.; Kassianov, Evgueni I.; Long, Charles N.; Mills Jr., David L.

2011-01-08T23:59:59.000Z

76

ACCURATE TEMPERATURE MEASUREMENTS IN A NATURALLY-ASPIRATED RADIATION SHIELD  

SciTech Connect (OSTI)

Experiments and calculations were conducted with a 0.13 mm fine wire thermocouple within a naturally-aspirated Gill radiation shield to assess and improve the accuracy of air temperature measurements without the use of mechanical aspiration, wind speed or radiation measurements. It was found that this thermocouple measured the air temperature with root-mean-square errors of 0.35 K within the Gill shield without correction. A linear temperature correction was evaluated based on the difference between the interior plate and thermocouple temperatures. This correction was found to be relatively insensitive to shield design and yielded an error of 0.16 K for combined day and night observations. The correction was reliable in the daytime when the wind speed usually exceeds 1 m s{sup -1} but occasionally performed poorly at night during very light winds. Inspection of the standard deviation in the thermocouple wire temperature identified these periods but did not unambiguously locate the most serious events. However, estimates of sensor accuracy during these periods is complicated by the much larger sampling volume of the mechanically-aspirated sensor compared with the naturally-aspirated sensor and the presence of significant near surface temperature gradients. The root-mean-square errors therefore are upper limits to the aspiration error since they include intrinsic sensor differences and intermittent volume sampling differences.

Kurzeja, R.

2009-09-09T23:59:59.000Z

77

Atmospheric Radiation Measurement Program Climate Research Facility Operations  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

8 8 Atmospheric Radiation Measurement Program Climate Research Facility Operations Quarterly Report January 1-March 31, 2011 DISCLAIMER This report was prepared as an account of work sponsored by the U.S. Government. Neither the United States nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or

78

Atmospheric Radiation Measurement Program Climate Research Facility Operations  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1 1 Atmospheric Radiation Measurement Climate Research Facility Operations Quarterly Report October 1-December 31, 2011 DISCLAIMER This report was prepared as an account of work sponsored by the U.S. Government. Neither the United States nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or

79

Atmospheric Radiation Measurement Program Climate Research Facility Operations  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

7 7 Atmospheric Radiation Measurement Climate Research Facility Operations Quarterly Report January 1-March 31, 2012 DISCLAIMER This report was prepared as an account of work sponsored by the U.S. Government. Neither the United States nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or

80

Space station: Infrastructure for radiation measurements in low Earth orbit  

Science Journals Connector (OSTI)

The National Aeronautics and Space Administration has recently begun the design and development phase of the Space Station Program. International negotiations with the Europeans Japanese and Canadians are progressing and they will soon join the United States in the development to complete plans for a cooperative international space endeavor. The Space Station will prove a permanently manned facility in low earth orbit to support scientific research technology development and commercial activities. In addition free?flying platforms will be developed to carry a variety of user payloads in polar orbit in co?orbit with the station and eventually into geosynchronous orbit. The Station and platforms represent an infrastructure of research facilities in space which could be utilized for measurements of naturally occurring radiation and secondary emissions over extended periods of time. High energy radiation experiments at the Station/platforms might vary in objective from scientific purpose of characterizing the radiation evironment for improved model accuracy. This paper describes the Space Station Program content schedule and approach for inputting user requirements into the design process. Conference participants can then assess to what extent this future capability in space matches their future research initiatives.

B. D. Meredith

1989-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiation measurement quality" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Using Medicaid and CHIP Claims Data to Support Pediatric Quality Measurement: Lessons From 3 Centers of Excellence in Measure Development  

Science Journals Connector (OSTI)

AbstractObjective We sought to explore the claims data-related issues relevant to quality measure development for Medicaid and the Children's Health Insurance Program (CHIP), illustrating the challenges encountered and solutions developed around 3 distinct performance measure topics: care coordination for children with complex needs, quality of care for high-prevalence conditions, and hospital readmissions. Methods Each of 3 centers of excellence presents an example that illustrates the challenges of using claims data for quality measurement. Results Our Centers of Excellence in pediatric quality measurement used innovative methods to develop algorithms that use Medicaid claims data to identify children with complex needs; overcome some shortcomings of existing data for measuring quality of care for common conditions such as otitis media; and identify readmissions after hospitalizations for lower respiratory infections. Conclusions Our experience constructing quality measure specifications using claims data suggests that it will be challenging to measure key quality of care constructs for Medicaid-insured children at a national level in a timely and consistent way. Without better data to underpin pediatric quality measurement, Medicaid and CHIP will have difficulty using some existing measures for accountability, value-based purchasing, and quality improvement both across states and within states.

Courtney Gidengil; Rita Mangione-Smith; L. Charles Bailey; Mary Lawrence Cawthon; Elizabeth A. McGlynn; Mari M. Nakamura; Jeffrey Schiff; Mark A. Schuster; Eric C. Schneider

2014-01-01T23:59:59.000Z

82

Atmospheric Radiation Measurement (ARM) Data from the ARM Aerial Facility  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

The Atmospheric Radiation Measurement (ARM) Program is the largest global change research program supported by the U.S. Department of Energy. The primary goal of the ARM Program is to improve the treatment of cloud and radiation physics in global climate models in order to improve the climate simulation capabilities of these models. ARM data is collected both through permanent monitoring stations and field campaigns around the world. Airborne measurements required to answer science questions from researchers or to validate ground data are also collected. To find data from all categories of aerial operations, follow the links from the AAF information page at http://www.arm.gov/sites/aaf. Tables of information will provide start dates, duration, lead scientist, and the research site for each of the named campaigns. The title of a campaign leads, in turn, to a project description, contact information, and links to the data. Users will be requested to create a password, but the data files are free for viewing and downloading. The ARM Archive physically resides at the Oak Ridge National Laboratory.

83

Impact of Quality Assurance Rounds in a Canadian Radiation Therapy Department  

SciTech Connect (OSTI)

Purpose: Quality assurance (QA) programs aim to identify inconsistencies that may compromise patient care. Radiation treatment planning is a well-documented source of variation in radiation oncology, leading many organizations to recommend the implementation of QA rounds in which radiation therapy plans are peer reviewed. This study evaluates the outcome of QA rounds that have been conducted by a radiation therapy department since 2004. Methods and Materials: Prospectively documented records of QA rounds, from 2004 to 2010, were obtained. During rounds, randomly selected radiation therapy plans were peer reviewed and assigned a grade of A (adequate), B (minor suggestions of change to a plan for a future patient), or C (significant change required before the next fraction). The proportion of plans that received each recommendation was calculated, and the relationship between recommendations for each plan, tumor site, and mean years of experience of the radiation oncologist (RO) were explored. Chart reviews were performed for each plan that received a C. Results: During the study period, 1247 plans were evaluated; 6% received a B and 1% received a C. The mean RO years of experience were lower for plans graded C versus those graded A (P=.02). The tumor sites with the highest proportion of plans graded B or C were gastrointestinal (14%), lung (13%), and lymphoma (8%). The most common reasons for plans to receive a grade of C were inadequate target volume coverage (36%), suboptimal dose or fractionation (27%), errors in patient setup (27%), and overtreatment of normal tissue (9%). Conclusions: This study demonstrated that QA rounds are feasible and an important element of a radiation therapy department's QA program. Through peer review, plans that deviate from a department's expected standard can be identified and corrected. Additional benefits include identifying patterns of practice that may contribute to inconsistencies in treatment planning and the continuing education of staff members who attend.

Lefresne, Shilo; Olivotto, Ivo A.; Joe, Howard; Blood, Paul A. [Radiotherapy Department, BC Cancer Agency, Vancouver Island Centre, Vancouver, British Columbia (Canada) [Radiotherapy Department, BC Cancer Agency, Vancouver Island Centre, Vancouver, British Columbia (Canada); Radiotherapy Department, University of British Columbia, Vancouver, British Columbia (Canada); Olson, Robert A., E-mail: rolson2@bccancer.bc.ca [Radiotherapy Department, University of British Columbia, Vancouver, British Columbia (Canada); Radiotherapy Department, BC Cancer Agency, Centre for the North, Prince George, British Columbia (Canada)

2013-03-01T23:59:59.000Z

84

Developing Quality Assurance Processes for Image-Guided Adaptive Radiation Therapy  

SciTech Connect (OSTI)

Quality assurance has long been implemented in radiation treatment as systematic actions necessary to provide adequate confidence that the radiation oncology service will satisfy the given requirements for quality care. The existing reports from the American Association of Physicists in Medicine Task Groups 40 and 53 have provided highly detailed QA guidelines for conventional radiotherapy and treatment planning. However, advanced treatment processes recently developed with emerging high technology have introduced new QA requirements that have not been addressed previously in the conventional QA program. Therefore, it is necessary to expand the existing QA guidelines to also include new considerations. Image-guided adaptive radiation therapy (IGART) is a closed-loop treatment process that is designed to include the individual treatment information, such as patient-specific anatomic variation and delivered dose assessed during the therapy course in treatment evaluation and planning optimization. Clinical implementation of IGART requires high levels of automation in image acquisition, registration, segmentation, treatment dose construction, and adaptive planning optimization, which brings new challenges to the conventional QA program. In this article, clinical QA procedures for IGART are outlined. The discussion focuses on the dynamic or four-dimensional aspects of the IGART process, avoiding overlap with conventional QA guidelines.

Yan Di [Department of Radiation Oncology, William Beaumont Hospital, Royal Oak, MI (United States)], E-mail: dyan@beaumont.edu

2008-05-01T23:59:59.000Z

85

Atmospheric Radiation Measurement Program facilities newsletter, January 2000  

SciTech Connect (OSTI)

The subject of this newsletter is the ARM unmanned aerospace vehicle program. The ARM Program's focus is on climate research, specifically research related to solar radiation and its interaction with clouds. The SGP CART site contains highly sophisticated surface instrumentation, but even these instruments cannot gather some crucial climate data from high in the atmosphere. The Department of Energy and the Department of Defense joined together to use a high-tech, high-altitude, long-endurance class of unmanned aircraft known as the unmanned aerospace vehicle (UAV). A UAV is a small, lightweight airplane that is controlled remotely from the ground. A pilot sits in a ground-based cockpit and flies the aircraft as if he were actually on board. The UAV can also fly completely on its own through the use of preprogrammed computer flight routines. The ARM UAV is fitted with payload instruments developed to make highly accurate measurements of atmospheric flux, radiance, and clouds. Using a UAV is beneficial to climate research in many ways. The UAV puts the instrumentation within the environment being studied and gives scientists direct measurements, in contrast to indirect measurements from satellites orbiting high above Earth. The data collected by UAVs can be used to verify and calibrate measurements and calculated values from satellites, therefore making satellite data more useful and valuable to researchers.

Sisterson, D.L.

2000-02-16T23:59:59.000Z

86

Measurement of the radiation field surrounding the Collider Detector at Fermilab  

SciTech Connect (OSTI)

We present here the first direct and detailed measurements of the spatial distribution of the ionizing radiation surrounding a hadron collider experiment. Using data from two different exposures we measure the effect of additional shielding on the radiation field around the Collider Detector at Fermilab (CDF). Employing a simple model we parameterize the ionizing radiation field surrounding the detector.

K. Kordas et al.

2004-01-28T23:59:59.000Z

87

Atmospheric Radiation Measurement Climate Research Facility (ACRF) Annual Report 2007  

SciTech Connect (OSTI)

This annual report describes the purpose and structure of the program, and presents key accomplishments in 2007. Notable achievements include: • Successful review of the ACRF as a user facility by the DOE Biological and Environmental Research Advisory Committee. The subcommittee reinforced the importance of the scientific impacts of this facility, and its value for the international research community. • Leadership of the Cloud Land Surface Interaction Campaign. This multi-agency, interdisciplinary field campaign involved enhanced surface instrumentation at the ACRF Southern Great Plains site and, in concert with the Cumulus Humilis Aerosol Processing Study sponsored by the DOE Atmospheric Science Program, coordination of nine aircraft through the ARM Aerial Vehicles Program. • Successful deployment of the ARM Mobile Facility in Germany, including hosting nearly a dozen guest instruments and drawing almost 5000 visitors to the site. • Key advancements in the representation of radiative transfer in weather forecast models from the European Centre for Medium-Range Weather Forecasts. • Development of several new enhanced data sets, ranging from best estimate surface radiation measurements from multiple sensors at all ACRF sites to the extension of time-height cloud occurrence profiles to Niamey, Niger, Africa. • Publication of three research papers in a single issue (February 2007) of the Bulletin of the American Meteorological Society.

LR Roeder

2007-12-01T23:59:59.000Z

88

A Comprehensive Quality Assurance Program for Personnel and Procedures in Radiation Oncology: Value of Voluntary Error Reporting and Checklists  

SciTech Connect (OSTI)

Purpose: This report describes the value of a voluntary error reporting system and the impact of a series of quality assurance (QA) measures including checklists and timeouts on reported error rates in patients receiving radiation therapy. Methods and Materials: A voluntary error reporting system was instituted with the goal of recording errors, analyzing their clinical impact, and guiding the implementation of targeted QA measures. In response to errors committed in relation to treatment of the wrong patient, wrong treatment site, and wrong dose, a novel initiative involving the use of checklists and timeouts for all staff was implemented. The impact of these and other QA initiatives was analyzed. Results: From 2001 to 2011, a total of 256 errors in 139 patients after 284,810 external radiation treatments (0.09% per treatment) were recorded in our voluntary error database. The incidence of errors related to patient/tumor site, treatment planning/data transfer, and patient setup/treatment delivery was 9%, 40.2%, and 50.8%, respectively. The compliance rate for the checklists and timeouts initiative was 97% (P<.001). These and other QA measures resulted in a significant reduction in many categories of errors. The introduction of checklists and timeouts has been successful in eliminating errors related to wrong patient, wrong site, and wrong dose. Conclusions: A comprehensive QA program that regularly monitors staff compliance together with a robust voluntary error reporting system can reduce or eliminate errors that could result in serious patient injury. We recommend the adoption of these relatively simple QA initiatives including the use of checklists and timeouts for all staff to improve the safety of patients undergoing radiation therapy in the modern era.

Kalapurakal, John A., E-mail: j-kalapurakal@northwestern.edu [Department of Radiation Oncology, Northwestern University Feinberg School of Medicine, Chicago, Illinois (United States); Zafirovski, Aleksandar; Smith, Jeffery; Fisher, Paul; Sathiaseelan, Vythialingam [Department of Radiation Oncology, Northwestern University Feinberg School of Medicine, Chicago, Illinois (United States)] [Department of Radiation Oncology, Northwestern University Feinberg School of Medicine, Chicago, Illinois (United States); Barnard, Cynthia [Department of Quality Strategies, Northwestern Memorial Hospital, Chicago, Illinois (United States)] [Department of Quality Strategies, Northwestern Memorial Hospital, Chicago, Illinois (United States); Rademaker, Alfred W. [Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois (United States)] [Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois (United States); Rave, Nick [Department of Physicians Services, Northwestern Memorial Hospital, Chicago, Illinois (United States)] [Department of Physicians Services, Northwestern Memorial Hospital, Chicago, Illinois (United States); Mittal, Bharat B. [Department of Radiation Oncology, Northwestern University Feinberg School of Medicine, Chicago, Illinois (United States)] [Department of Radiation Oncology, Northwestern University Feinberg School of Medicine, Chicago, Illinois (United States)

2013-06-01T23:59:59.000Z

89

Radiation Hard Hybrid Pixel Detectors, and a bbbar Cross Section Measurement at the CMS Experiment  

E-Print Network [OSTI]

is placed on the effects of the high radiation environment on the detector operation. Measurements of the charge collection efficiency, interpixel capacitance, and other properties of the pixel sensors as a function of the radiation damage are presented...

Sibille, Jennifer Ann

2013-05-31T23:59:59.000Z

90

DOE/ER-0441 Atmospheric Radiation Measurement Plan - February 1990  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1 1 Atmospheric Radiation Measurement Program Plan ARM Program Plan Forward In 1978 the Department of Energy initiated the Carbon Dioxide Research Program to address climate change from the increasing concentration of carbon dioxide in the atmosphere. Over the years the Program has studied the many facets of the issue, from the carbon cycle, the climate diagnostics, the vegetative effects, to the societal impacts. The Program is presently the Department's principal entry in the U.S. Global Change Research Program coordinated by the Committee on Earth Sciences (CES) of the Office of Science and Technology Policy (OSTP). The recent heightened concern about global warming from an enhanced greenhouse effect has prompted the Department to accelerate the research to improve predictions of climate change. The emphasis is on

91

Abstract 4422: Activation of beta-catenin/TCF-4 signaling leading to intestinal tumorigenesis in APCMin/+ mice is radiation quality dependent  

Science Journals Connector (OSTI)

...mice is radiation quality dependent Kamal Datta...Purpose: Radiation quality depends on loss of energy in tissues per unit...iron (56-Fe) ion (energy: 1 GeV/nucleon...Gy determined using a quality factor 1.25 and 1...

Kamal Datta; Shubankar Suman; Daniela Trani; and Albert J. Fornace

2012-04-15T23:59:59.000Z

92

Achieving Software Quality with Testing Coverage Measures: Metrics, Tools, and Applications  

E-Print Network [OSTI]

Achieving Software Quality with Testing Coverage Measures: Metrics, Tools, and Applications J. R of data flow testing, describes a software testing and analysis tool called ATAC, which measures the effectiveness of testing data, and presents two case studies connecting software quality with the control

Lyu, Michael R.

93

DOE/SC-ARM-13-007 Atmospheric Radiation Measurement Climate Research...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Radiation Measurement Climate Research Facility Operations Quarterly Report January 1-March 31, 2013 DISCLAIMER This report was prepared as an account of work sponsored by the...

94

Throughput Measurement of a Multilayer-Coated Schwarzschild Objective Using Synchrotron Radiation  

Science Journals Connector (OSTI)

The throughput of a Schwarzschild objective using undulator synchrotron radiation was measured. ... estimated from the squared reflectivity of one multilayer mirror and from the obstruction ratio. However,...

Takanori Kiyokura; Fumihiko MAEDA; Yoshio Watanabe; Yoshinori Iketaki…

95

MEASUREMENT OF THE HIGH GAMMA RADIATION DOSE USING THE MEMS BASED DOSIMETER AND RADIOLISYS EFFECT  

E-Print Network [OSTI]

radiation dose. If we consider, that the average time of exploitation is estimated to be 40 years and veryMEASUREMENT OF THE HIGH GAMMA RADIATION DOSE USING THE MEMS BASED DOSIMETER AND RADIOLISYS EFFECT M of high and very high doses of ionizing radiation is crucial for the monitoring of the existing Nuclear

Boyer, Edmond

96

Measurement of steam quality in two-phase critical flow  

E-Print Network [OSTI]

through a venturi for subczitical flow of steam-water 45 13 Steam quality as a function of vapor-phase Reynolds number for subczitical flow of steam-water 46 14 Steam quality as a function of Collins and Gacesa parameter for subcritical flow of steam... high degree of accuracy. He suggested that the following correlation may be used to calculate two-phase flow rates through orifices to within an error of 1. 5 percent 339 K 3 9 9' J 9 v v a v w f + [ 1. 26 (1-f ) K Y /K ] ~p p where V and L...

Sinclair, John William

2012-06-07T23:59:59.000Z

97

Reduction of radiation dose to radiosensitive organs and its tradeoff with image quality in Computed Tomography  

E-Print Network [OSTI]

Trimester Fetal Radiation Dose Estimation in 16-MDCT Withoutsimulations for radiation dose estimations discussed in thisspecific radiation dose and cancer risk estimation in CT:

Zhang, Di

2012-01-01T23:59:59.000Z

98

76Radiation Dose and Dose Rate Radiation is measured in two  

E-Print Network [OSTI]

Seiverts per year. Hasty reports about the devastating Japan 2011 nuclear power plant radiation leakages have by Concorde, what are the total radiation doses for a passenger in each case? Problem 3 - The Japan 2011 earthquake damaged several nuclear reactors, causing radiation leakage across northern Japan. On March 22

99

Atmospheric Radiation Measurement Program facilities newsletter, November 2002.  

SciTech Connect (OSTI)

Fall 2002 Intensive Operation Periods: Single Column Model and Unmanned Aerospace Vehicle--In an Intensive Operation Period (IOP) on November 3-23, 2002, researchers at the SGP CART site are collecting a detailed data set for use in improving the Single Column Model (SCM), a scaled-down climate model. The SCM represents one vertical column of air above Earth's surface and requires less computation time than a full-scale global climate model. Researchers first use the SCM to efficiently improve submodels of clouds, solar radiation transfer, and atmosphere-surface interactions, then implement the results in large-scale global models. With measured values for a starting point, the SCM predicts atmospheric variables during prescribed time periods. A computer calculates values for such quantities as the amount of solar radiation reaching the surface and predicts how clouds will evolve and interact with incoming light from the sun. Researchers compare the SCM's predictions with actual measurements made during the IOP, then adjust the submodels to make predictions more reliable. A second IOP conducted concurrently with the SCM IOP involves high-altitude, long-duration aircraft flights. The original plan was to use an unmanned aerospace vehicle (UAV), but the National Aeronautics and Space Administration (NASA) aircraft Proteus will be substituted because all UAVs have been deployed elsewhere. The UAV is a small, instrument-equipped, remote-control plane that is operated from the ground by a computer. The Proteus is a manned aircraft, originally designed to carry telecommunications relay equipment, that can be reconfigured for uses such as reconnaissance and surveillance, commercial imaging, launching of small space satellites, and atmospheric research. The plane is designed for two on-board pilots in a pressurized cabin, flying to altitudes up to 65,000 feet for as long as 18 hours. The Proteus has a variable wingspan of 77-92 feet and is 56 feet long. The plane can carry up to 7,260 pounds of equipment, making it a versatile research tool. The Proteus is making measurements at the very top of the cirrus cloud layer to characterize structures of these clouds. These new measurements will provide more accurate, more abundant data for use in improving the representation of clouds in the SCM. 2002-2003 Winter Weather Forecast--Top climate forecasters at the National Oceanic and Atmospheric Administration's (NOAA's) Climate Prediction Center say that an El Nino condition in the tropical Pacific Ocean will influence our winter weather this year. Although this El Nino is not as strong as the event of the 1997-1998 winter season, the United States will nevertheless experience some atypical weather. Strong impacts could be felt in several areas. Nationally, forecasters are predicting warmer-than-average temperatures over the northern tier of states and wetter-than-average conditions in the southern tier of states during the 2002-2003 winter season. Kansas residents should expect warmer and wetter conditions, while Oklahoma will be wetter than average.

Holdridge, D. J.

2002-12-03T23:59:59.000Z

100

Measurements and model calculations of radiative fluxes for the...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of radiative fluxes for the Cabauw Experimental Site for Atmospheric Research, the Netherlands Knap, Wouter Royal Netherlands Meteorological Institute KNMI Los, Alexander KNMI...

Note: This page contains sample records for the topic "radiation measurement quality" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Atmospheric Radiation Measurement (ARM) Data from the ARM Specific Measurement Categories  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

The ARM Program gathers a wide variety of measurements from many different sources. Each day, the Data Archive stores and distributes large quantities of data collected from these sources. Scientists then use these data to research atmospheric radiation balance and cloud feedback processes, which are critical elements of global climate change. The huge archive of ARM data can be organized by measurement categories into six "collections:" Aerosols, Atmospheric Carbon, Atmospheric State, Cloud Properties, Radiometric, and Surface Properties. Clicking on one of the measurement categories leads to a page that breaks that category down into sub-categories. For example, "Aerosols" is broken down into Microphysical and Chemical Properties (with 9 subsets) and Optical and Radiative Properties (with 7 subsets). Each of the subset links, in turn, leads to detailed information pages and links to specific data streams. Users will be requested to create a password, but the data files are free for viewing and downloading. The ARM Archive physically resides at the Oak Ridge National Laboratory.

102

Radioanalytical Data Quality Objectives and Measurement Quality Objectives during a Federal Radiological Monitoring and Assessment Center Response  

SciTech Connect (OSTI)

During the early and intermediate phases of a nuclear or radiological incident, the Federal Radiological Monitoring and Assessment Center (FRMAC) collects environmental samples that are analyzed by organizations with radioanalytical capability. Resources dedicated to quality assurance (QA) activities must be sufficient to assure that appropriate radioanalytical measurement quality objectives (MQOs) and assessment data quality objectives (DQOs) are met. As the emergency stabilizes, QA activities will evolve commensurate with the need to reach appropriate DQOs. The MQOs represent a compromise between precise analytical determinations and the timeliness necessary for emergency response activities. Minimum detectable concentration (MDC), lower limit of detection, and critical level tests can all serve as measurements reflecting the MQOs. The relationship among protective action guides (PAGs), derived response levels (DRLs), and laboratory detection limits is described. The rationale used to determine the appropriate laboratory detection limit is described.

E. C. Nielsen

2006-01-01T23:59:59.000Z

103

Geiger M., Diabat L., Mnard L., Wald L., 2002. A web service for controlling the quality of measurements of global solar irradiation. Solar Energy, Vol. 73, No 6, pp. 475-480  

E-Print Network [OSTI]

sensitive sensors measure the downward solar radiation flux on a horizontal surface during a given time of measurements of global solar irradiation. Solar Energy, Vol. 73, No 6, pp. 475-480 Copyright Ecole des Mines de Paris -Armines - UFAE 1 A WEB SERVICE FOR CONTROLLING THE QUALITY OF MEASUREMENTS OF GLOBAL SOLAR

Paris-Sud XI, Université de

104

Web-based tools for quality assurance and radiation protection in diagnostic radiology  

Science Journals Connector (OSTI)

......relating to radiation protection...physicist, radiation safety officer, other...use of any software other than...of the QADDS software package. ACKNOWLEDGEMENTS...exposure to radiation in medical...Radiation safety management......

B. M. Moores; P. Charnock; M. Ward

2010-01-01T23:59:59.000Z

105

Solar Radiometric Data Quality Assessment of SIRS, SKYRAD and GNDRAD Measurements (Poster)  

SciTech Connect (OSTI)

Solar radiation is the driving force for the earth's weather and climate. Understanding the elements of this dynamic energy balance requires accurate measurements of broadband solar irradiance. Since the mid-1990's the ARM Program has deployed pyrheliometers and pyranometers for the measurement of direct normal irradiance (DNI), global horizontal irradiance (GHI), diffuse horizontal irradiance (DHI), and upwelling shortwave (US) radiation at permanent and mobile field research sites. This poster summarizes the basis for assessing the broadband solar radiation data available from the SIRS, SKYRAD, and GNDRAD measurement systems and provides examples of data inspections.

Habte, A.; Stoffel, T.; Reda, I.; Wilcox, S.; Kutchenreiter, M.; Gotseff, P.; Anderberg, M.

2014-03-01T23:59:59.000Z

106

Measurements of Dust Oscillations with Laser Heterodyne Receiver of Scattered Radiation  

SciTech Connect (OSTI)

We performed the experiments on measurement of vibration amplitudes for microparticles in gas and water with laser heterodyne receiver of scattered radiation. The measured vibration amplitude values are about 20 nm.

Serozhkin, Yuriy; Venger, Yevgen [V. Lashkaryov Institute of Semiconductor Physics, 41 Nauky Prospect, Kyiv 03028 (Ukraine)

2011-11-29T23:59:59.000Z

107

Quality Assurance of Radiation Therapy Planning Systems: Current Status and Remaining Challenges  

SciTech Connect (OSTI)

Computerized radiation therapy planning systems (RTPSs) are pivotal for treatment planning. The acceptance, commissioning, and quality control of RTPSs are uniquely complex and are described in the American Association of Physicists in Medicine Task Group Report 53 (1998) and International Atomic Energy Agency Technical Report Series No. 430 (2004). The International Atomic Energy Agency also developed a document and data package for use by vendors and purchasers to aid with acceptance testing of RTPSs. This document is based on International Electrotechnical Commission standard 62083 (2000) and describes both 'type' tests to be performed in the factory and 'site' tests to be performed in the clinic. The American Association of Physicists Task Group Report 67 described benchmark tests for the validation of dose calculation algorithms. Test data are being produced with the backing of the U.S. National Cancer Institute. However, significant challenges remain. Technology keeps evolving rapidly, thus requiring new quality assurance (QA) procedures. Intensity-modulated radiation therapy with its use of inverse optimization has added a new dimension to QA, because the results are not intuitively obvious. New technologies such as real-time ultrasound guidance for brachytherapy, TomoTherapy, and Cyberknife, require their own specialized RTPSs with unique QA requirements. On-line imaging allows for the generation of dose reconstructions using image warping techniques to determine the daily dose delivered to the patient. With increasing computer speeds, real-time reoptimization of treatment plans will become a reality. Gating technologies will require four-dimensional dose calculations to determine the actual dose delivered to tissue voxels. With these rapidly changing technologies, it is essential that a strong QA culture is invoked in every institution implementing these procedures and that new protocols are developed as a part of the clinical implementation process.

Van Dyk, Jacob [Department of Physics and Engineering, London Regional Cancer Program/London Health Sciences Centre, London, ON (Canada); Departments of Oncology, Medical Biophysics, Diagnostic Imaging and Nuclear Medicine, and Physics and Astronomy, University of Western Ontario, London, ON (Canada)], E-mail: jake.vandyk@lhsc.on.ca

2008-05-01T23:59:59.000Z

108

Accuracy of Humidity Measurement on Ships: Consideration of Solar Radiation Effects  

Science Journals Connector (OSTI)

The effect of heating due to solar radiation on measurements of humidity obtained from ships is examined. Variations in wet- and dry-bulb temperature measured on each side of a research ship are shown to correlate with solar radiation. However, ...

Elizabeth C. Kent; Peter K. Taylor

1996-12-01T23:59:59.000Z

109

Automation and Intensity Modulated Radiation Therapy for Individualized High-Quality Tangent Breast Treatment Plans  

Science Journals Connector (OSTI)

Purpose To demonstrate the large-scale clinical implementation and performance of an automated treatment planning methodology for tangential breast intensity modulated radiation therapy (IMRT). Methods and Materials Automated planning was used to prospectively plan tangential breast IMRT treatment for 1661 patients between June 2009 and November 2012. The automated planning method emulates the manual steps performed by the user during treatment planning, including anatomical segmentation, beam placement, optimization, dose calculation, and plan documentation. The user specifies clinical requirements of the plan to be generated through a user interface embedded in the planning system. The automated method uses heuristic algorithms to define and simplify the technical aspects of the treatment planning process. Results Automated planning was used in 1661 of 1708 patients receiving tangential breast IMRT during the time interval studied. Therefore, automated planning was applicable in greater than 97% of cases. The time for treatment planning using the automated process is routinely 5 to 6 minutes on standard commercially available planning hardware. We have shown a consistent reduction in plan rejections from plan reviews through the standard quality control process or weekly quality review multidisciplinary breast rounds as we have automated the planning process for tangential breast IMRT. Clinical plan acceptance increased from 97.3% using our previous semiautomated inverse method to 98.9% using the fully automated method. Conclusions Automation has become the routine standard method for treatment planning of tangential breast IMRT at our institution and is clinically feasible on a large scale. The method has wide clinical applicability and can add tremendous efficiency, standardization, and quality to the current treatment planning process. The use of automated methods can allow centers to more rapidly adopt IMRT and enhance access to the documented improvements in care for breast cancer patients, using technologies that are widely available and already in clinical use.

Thomas G. Purdie; Robert E. Dinniwell; Anthony Fyles; Michael B. Sharpe

2014-01-01T23:59:59.000Z

110

Parametric Channeling Radiation and its Application to the Measurement of Electron Beam Energy  

SciTech Connect (OSTI)

We have proposed a method for observing parametric channeling radiation (PCR) and of applying it to the measurement of electron beam energy. The PCR process occurs if the energy of the channeling radiation coincides with the energy of the parametric X-ray radiation (PXR). The PCR process can be regarded as the diffraction of 'virtual channeling radiation'. We developed a scheme for beam energy measurement and designed an experimental setup. We also estimated the beam parameters, and calculated the angular distributions of PXR and PCR. These considerations indicate that the observation of PCR is promising.

Takabayashi, Y. [SAGA Light Source, 8-7 Yayoigaoka, Tosu, Saga 841-0005 (Japan)

2010-06-23T23:59:59.000Z

111

Measuring patients’ experiences with rheumatic care: the consumer quality index rheumatoid arthritis  

Science Journals Connector (OSTI)

Rheumatologists and other caregivers can learn from patients’ experiences with the quality of care that can be measured with the CQ-index Rheumatoid Arthritis (CQ-index RA) survey. Patients with RA (n = 590) rece...

Marloes Zuidgeest; Herman Sixma; Jany Rademakers

2009-12-01T23:59:59.000Z

112

Ozonesonde measurements from the Atmospheric Radiation Measurement (ARM) site in Billings, Oklahoma  

SciTech Connect (OSTI)

Ozonesonde instruments were prepared and released at the Atmospheric Radiation Measurement (ARM) site located near Billings, Oklahoma. Ozone sensors, associated radiosondes, balloons, and other parts and pieces required for the ozone observations were provided by WFF on a reimbursable arrangement with ANL. Observations were scheduled daily at 1,700 UTC beginning on September 22, 1995. Attempts to maintain this schedule were frustrated by a few simultaneous operations involving different electronic devices in use resulting in considerable rf noise. Since radiosondes are necessarily low-cost instruments their reception is particularly susceptible to noisy rf fields. Overall, however, 36 ozonesonde flights were made with the last observation occurring on November 1, 1995. Ozone data were processed on-site through the ground-station software and preliminary data delivered to Mike Splitt at the ARM site.

NONE

1998-12-01T23:59:59.000Z

113

Use of Long Time-series ACRF Measurements to Improve Data Quality Analysis  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

2, 2008 2, 2008 Eighteenth ARM Science Team Meeting 1 Use of Long Time-Series ACRF Measurements to Improve Data Quality Analysis Sean Moore Mission Research and Technical Services Santa Barbara, CA ARM Data Quality Office University of Oklahoma Norman, OK March 12, 2008 Eighteenth ARM Science Team Meeting 2 ARM Data Quality Office Full Time Staff *Ken Kehoe *Randy Peppler *Karen Sonntag *Justin Monroe Student Analysts *Nathan Hiers (Sr) *Stephen Mullens (Sr) *Kimberly Rabon (Jr) *Lacey Evans (Jr) ARM Data Quality Office, National Weather Center The University of Oklahoma, Norman, OK Sean Moore Mission Research and Technical Services Santa Barbara, CA March 12, 2008 Eighteenth ARM Science Team Meeting 3 Daily Quality Checks * Automated software checks every measurement for outliers against some pre-defined limits.

114

Experimental Measurement of Radiation Heat Transfer from Complex Fenestration Systems.  

E-Print Network [OSTI]

??A well instrumented facility for the measurement of heat transfer from complex fenestration systems was built and validated. The facility provided very accurate measurements based… (more)

Wilson, Barry Allan

2007-01-01T23:59:59.000Z

115

A New Approach to Measuring Image Quality via  

E-Print Network [OSTI]

B.2 Indian Test Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . 47 B.3 Burst Test measured between compressed and translated images. . 34 B.1 Detecting image degradation in the indian test for a point in an image. . . . . 20 4.4 Filters for phase extraction in 2-dimensions

Kovesi, Peter

116

Atmospheric Radiation Measurement (ARM) Data from Point Reyes, California for the Marine Stratus, Radiation, Aerosol, and Drizzle (MASRAD) Project  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

Point Reyes National Seashore, on the California coast north of San Francisco, was the location of the first deployment of the DOE's Atmospheric Radiation Measurement (ARM) Mobile Facility (AMF). The ARM Program collaborated with the U.S. Office of Naval Research and DOE's Aerosol Science Program in the Marine Stratus, Radiation, Aerosol, and Drizzle (MASRAD) project. Their objectives were to collect data from cloud/aerosol interactions and to improve understanding of cloud organization that is often associated with patches of drizzle. Between March and September 2005, the AMF and at least two research aircraft were used to collect data.

117

Improving the reliability and accuracy of a multipyranometer array measuring solar radiation  

E-Print Network [OSTI]

The measurement of solar radiation is crucial for the use of solar energy in fields including power generation, agriculture and meteorology. In the building sciences, It is essential for daylighting studies, energy use calculations, and thermal...

Klima, Peter Miloslaw

2012-06-07T23:59:59.000Z

118

Spacecraft Habitation Systems, Water Recovery and Waste Active Charged Particle and Neutron Radiation Measurement  

E-Print Network [OSTI]

-PMWC) Orbital Technologies Corporation Technical Abstract Model calculations and risk assessment estimates Particle and Neutron Radiation Measurement Technologies Technical Abstract The innovative High Efficiency the resultant plastic tiles. This system requires access to power, data, and cooling interfaces. The system

119

On the Results of Measurements of the Direct Sun Radiation Flux...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

On the Results of Measurements of the Direct Sun Radiation Flux by Actinometer and of Maximal Polarization of Sky Brightness in the Solar Almucantar A. Kh. Shukurov, K. A....

120

Radiated seismic energy from coda measurements and no scaling in apparent stress with seismic moment  

E-Print Network [OSTI]

Radiated seismic energy from coda measurements and no scaling in apparent stress with seismic energy are consistent with independent measurements, where available. We find no dependence in individual seismic energy from coda measurements and no scaling in apparent stress with seismic moment, J. Geophys

Prieto, Germán A.

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121

On the use of computed radiography plates for quality assurance of intensity modulated radiation therapy dose distributions  

SciTech Connect (OSTI)

Purpose: As traditional film is phased out in most radiotherapy centers, computed radiography (CR) systems are increasingly being purchased as a replacement. CR plates can be used for patient imaging, but may also be used for a variety of quality assurance (QA) purposes and can be calibrated in terms of dose. This study looks at their suitability for verification of intensity modulated radiation therapy (IMRT) dose distributions. Methods: A CR plate was calibrated in terms of the relative dose and the stability of response over 1 year was studied. The effect of exposing the CR plate to ambient light and of using different time delays before scanning was quantified. The CR plate was used to verify the relative dose distributions for ten IMRT patients and the results were compared to those obtained using a two dimensional (2D) diode array. Results: Exposing the CR plate to 10 s of ambient light between irradiation (174 cGy) and scanning erased approximately 80% of the signal. Changes in delay time between irradiation and scanning also affected the measurement results. The signal on the plate was found to decay at a rate of approximately 3.6 cGy/min in the first 10 min after irradiation. The use of a CR plate for IMRT patient-specific QA resulted in a significantly lower distance to agreement (DTA) and gamma pass rate than when using a 2D diode array for the measurement. This was primarily due to the over-response of the CR phosphor to low energy scattered radiation. For the IMRT QA using the CR plate, the average gamma pass rate was 97.3%. For the same IMRT QA using a diode array, the average gamma pass rate was 99.7%. The gamma criteria used were 4% dose difference and 4 mm DTA for head and neck treatments and 3% dose difference and 3 mm DTA for prostate treatments. The gamma index tolerance was 1. The lowest 10% of the dose distribution was excluded from all gamma and DTA analyses. Conclusions: Although the authors showed that CR plates can be used for patient specific IMRT QA, the practical problems such as the over-response to low energy scatter and signal fading with light exposure and time mean that alternative detectors such as radiochromic film or diode arrays will be a more sensible choice for most radiotherapy departments.

Day, R. A.; Sankar, A. P.; Nailon, W. H.; MacLeod, A. S. [Department of Oncology Physics, Edinburgh Cancer Centre, Western General Hospital, Crewe Road South, Edinburgh EH4 2XU (United Kingdom)

2011-02-15T23:59:59.000Z

122

A Simple Heat-Flow Quality Function And Appraisal Of Heat-Flow Measurements  

Open Energy Info (EERE)

Simple Heat-Flow Quality Function And Appraisal Of Heat-Flow Measurements Simple Heat-Flow Quality Function And Appraisal Of Heat-Flow Measurements And Heat-Flow Estimates From The Uk Geothermal Catalogue Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A Simple Heat-Flow Quality Function And Appraisal Of Heat-Flow Measurements And Heat-Flow Estimates From The Uk Geothermal Catalogue Details Activities (0) Areas (0) Regions (0) Abstract: A comprehensive database of temperature, heat flow, thermal conductivity and geochemistry is the basis of geothermal modelling. The latest revision (1987) of the UK Geothermal Catalogue (UKGC) contains over 2600 temperatures at over 1150 sites and over 200 observations of heat flow. About 93% of the temperature data are from depths less than 2000 m and about 50% are Bottom Hole Temperatures (BHT). Heat-flow density

123

Measure of Diffusion Model Error for Thermal Radiation Transport  

E-Print Network [OSTI]

cm2 sh keV c Speed of light 2:99 102 cmsh D Di usion coe cient ( 13 t ) cm F Radiation ux jkcm2 sh k Time iteration t Di erence between consecutive time steps shakes(sh) hi Size of spatial cell, i cm ! Direction of photon propagation ster... backward Euler implicit di erencing in time and lumped LD in space to (5.5), we get 1 c t (k+ 12) i;L (k 12) i;L hi 2 + F (k+ 12) i F (k+ 12) i 12 + hi 2 a (k+ 12) i;L = QL hi 2 ; (8.2a) 1 c t (k+ 12) i;R (k...

Kumar, Akansha

2013-04-19T23:59:59.000Z

124

On Correction of Diffuse Radiation Measured by MFRSR  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Measured by MFRSR T. B. Zhuravleva Institute of Atmospheric Optics, SB RAS Tomsk, Russia M. A. Sviridenkov and P. P. Anikin A. M. Obukhov Institute of Atmospheric Physics, RAS...

125

Quality of Supply in Energy Regulation Measurement,Assessment and Experience from Norway  

E-Print Network [OSTI]

www.eprg.group.cam.ac.uk E P R G W O R K IN G P A P E R N O N -T E C H N IC A L S U M M A R Y Quality of Supply in Energy Regulation Measurement, Assessment and Experience from Norway EPRG Working Paper EPRG 0920 Cambridge... in the perforrnace of the Norwegian electricity distribution utilities. Contact c.growitsch@wik.org Publication July 2009 Financial Support www.eprg.group.cam.ac.uk Quality of Supply in Energy Regulation Measurement, Assessment...

Growitsch, Christian; Jamasb, Tooraj; Mueller, C; Wissner, M

126

Atmospheric Radiation Measurement (ARM) Data from Niamey, Niger for the Radiative Atmospheric Divergence using AMF, GERB and AMMA Stations (RADAGAST)  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

The Atmospheric Radiation Measurement (ARM) Program is the largest global change research program supported by the U.S. Department of Energy. The primary goal of the ARM Program is to improve the treatment of cloud and radiation physics in global climate models in order to improve the climate simulation capabilities of these models. To achieve this goal, ARM scientists and researchers around the world use continuous data obtained through the ARM Climate Research Facility. The ARM Mobile Facility (AMF) operates at non-permanent sites selected by the ARM Program. Sometimes these sites can become permanent ARM sites, as was the case with Graciosa Island in the Azores. It is now known as the Eastern North Atlantic permanent site. In January 2006 the AMF deployed to Niamey, Niger, West Africa, at the Niger Meteorological Office at Niamey International Airport. This deployment was timed to coincide with the field phases and Special Observing Periods of the African Monsoon Multidisciplinary Analysis (AMMA). The ARM Program participated in this international effort as a field campaign called "Radiative Divergence using AMF, GERB and AMMA Stations (RADAGAST).The primary purpose of the Niger deployment was to combine an extended series of measurements from the AMF with those from the Geostationary Earth Radiation Budget (GERB) Instrument on the Meteosat operational geostationary satellite in order to provide the first well-sampled, direct estimates of the divergence of solar and thermal radiation across the atmosphere. A large collection of data plots based on data streams from specific instruments used at Niamey are available via a link from ARM's Niamey, Niger site information page. Other data can be found at the related websites mentioned above and in the ARM Archive. Users will be requested to create a password, but the plots and data files are free for viewing and downloading. The ARM Archive physically resides at the Oak Ridge National Laboratory.

127

Climate Science for a Sustainable Energy Future Atmospheric Radiation Measurement Best Estimate (CSSEFARMBE)  

SciTech Connect (OSTI)

The Climate Science for a Sustainable Energy Future (CSSEF) project is working to improve the representation of the hydrological cycle in global climate models, critical information necessary for decision-makers to respond appropriately to predictions of future climate. In order to accomplish this objective, CSSEF is building testbeds to implement uncertainty quantification (UQ) techniques to objectively calibrate and diagnose climate model parameterizations and predictions with respect to local, process-scale observations. In order to quantify the agreement between models and observations accurately, uncertainty estimates on these observations are needed. The DOE Atmospheric Radiation Measurement (ARM) program takes atmospheric and climate related measurements at three permanent locations worldwide. The ARM VAP called the ARM Best Estimate (ARMBE) [Xie et al., 2010] collects a subset of ARM observations, performs quality control checks, averages them to one hour temporal resolution, and puts them in a standard format for ease of use by climate modelers. ARMBE has been widely used by the climate modeling community as a summary product of many of the ARM observations. However, the ARMBE product does not include uncertainty estimates on the data values. Thus, to meet the objectives of the CSSEF project and enable better use of this data with UQ techniques, we created the CSSEFARMBE data set. Only a subset of the variables contained in ARMBE is included in CSSEFARMBE. Currently only surface meteorological observations are included, though this may be expanded to include other variables in the future. The CSSEFARMBE VAP is produced for all extended facilities at the ARM Southern Great Plains (SGP) site that contain surface meteorological equipment. This extension of the ARMBE data set to multiple facilities at SGP allows for better comparison between model grid boxes and the ARM point observations. In the future, CSSEFARMBE may also be created for other ARM sites. As each site has slightly different instrumentation, this will require additional development to understand the uncertainty characterization associated with instrumentation at those sites. The uncertainty assignment process is implemented into the ARM program’s new Integrated Software Development Environment (ISDE) so that many of the key steps can be used in the future to screen data based on ARM Data Quality Reports (DQRs), propagate uncertainties when transforming data from one time scale into another, and convert names and units into NetCDF Climate and Forecast (CF) standards. These processes are described in more detail in the following sections.

Riihimaki, Laura D.; Gaustad, Krista L.; McFarlane, Sally A.

2012-09-28T23:59:59.000Z

128

Design Specifications for a Radiation Tolerant Beam Loss Measurement ASIC  

E-Print Network [OSTI]

A novel radiation-hardened current digitizer ASIC is in planning stage, aimed at the acquisition of the current signals from the ionization chambers employed in the Beam Loss Monitoring system at CERN. The purpose is to match and exceed the performance of the existing discrete component design, currently in operation in the Large Hadron Collider (LHC). The specifications include: a dynamic range of nine decades, defaulting to the 1 pA-1mA range but adjustable by the user, ability to withstand a total integrated dose of 10 kGy at least in 20 years of operation and user selectable integrating windows, as low as 500 ns. Moreover, the integrated circuit should be able to digitize currents of both polarity with a minimum number of external components and without needing any configuration. The target technology is the IBM 130nm CMOS process. The specifications, the architecture choices and the reasons on which they are based upon are discussed in this paper.

Venturini, G G; Effinger, E; Zamantzas, C

2009-01-01T23:59:59.000Z

129

Atmospheric Radiation Measurement (ARM) Data Plots and Figures  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

ARM Program data is available in daily diagnostic plots that can be easily grouped into daily, weekly, monthly, and even yearly increments. By visualizing ARM data in thumbnail-sized data plots, users experience highly-browsable subsets of data available at the Data Archive including complimentary data products derived from data processed by ARM. These thumbnails allow users to quickly scan for a particular type of condition, like a clear day or a day with persistent cirrus. From a diagnostics perspective, the data plots assist in looking for missing data, for data exceeding a particular range, or for loading multiple variables (e.g., shortwave fluxes and precipitation), and to determine whether a certain science or data quality condition is associated with some other parameter (e.g., high wind or rain).[taken from http://www.arm.gov/data/data_plots.stm] Several interfaces and tools have been developed to make data plots easy to generate and manipulate. For example, the NCVWeb is an interactive NetCDF data plotting tool that ARM users can use to plot data as they order it or to plot regular standing data orders. It allows production of detailed tables, extraction of data, statistics output, comparison plotting, etc. without the need for separate visualization software. Users will be requested to create a password, but the data plots are free for viewing and downloading.

130

Quality Assurance Needs for Modern Image-Based Radiotherapy: Recommendations From 2007 Interorganizational Symposium on 'Quality Assurance of Radiation Therapy: Challenges of Advanced Technology'  

SciTech Connect (OSTI)

This report summarizes the consensus findings and recommendations emerging from 2007 Symposium, 'Quality Assurance of Radiation Therapy: Challenges of Advanced Technology.' The Symposium was held in Dallas February 20-22, 2007. The 3-day program, which was sponsored jointly by the American Society for Therapeutic Radiology and Oncology (ASTRO), American Association of Physicists in Medicine (AAPM), and National Cancer Institute (NCI), included >40 invited speakers from the radiation oncology and industrial engineering/human factor communities and attracted nearly 350 attendees, mostly medical physicists. A summary of the major findings follows. The current process of developing consensus recommendations for prescriptive quality assurance (QA) tests remains valid for many of the devices and software systems used in modern radiotherapy (RT), although for some technologies, QA guidance is incomplete or out of date. The current approach to QA does not seem feasible for image-based planning, image-guided therapies, or computer-controlled therapy. In these areas, additional scientific investigation and innovative approaches are needed to manage risk and mitigate errors, including a better balance between mitigating the risk of catastrophic error and maintaining treatment quality, complimenting the current device-centered QA perspective by a more process-centered approach, and broadening community participation in QA guidance formulation and implementation. Industrial engineers and human factor experts can make significant contributions toward advancing a broader, more process-oriented, risk-based formulation of RT QA. Healthcare administrators need to appropriately increase personnel and ancillary equipment resources, as well as capital resources, when new advanced technology RT modalities are implemented. The pace of formalizing clinical physics training must rapidly increase to provide an adequately trained physics workforce for advanced technology RT. The specific recommendations of the Symposium included the following. First, the AAPM, in cooperation with other advisory bodies, should undertake a systematic program to update conventional QA guidance using available risk-assessment methods. Second, the AAPM advanced technology RT Task Groups should better balance clinical process vs. device operation aspects-encouraging greater levels of multidisciplinary participation such as industrial engineering consultants and use-risk assessment and process-flow techniques. Third, ASTRO should form a multidisciplinary subcommittee, consisting of physician, physicist, vendor, and industrial engineering representatives, to better address modern RT quality management and QA needs. Finally, government and private entities committed to improved healthcare quality and safety should support research directed toward addressing QA problems in image-guided therapies.

Williamson, Jeffrey F. [Virginia Commonwealth University, Richmond, VA (United States)], E-mail: jwilliamson@mcvh-vcu.edu; Dunscombe, Peter B. [University of Calgary, Calgary, AB (Canada); Sharpe, Michael B. [Princess Margaret Hospital, Toronto, ON (Canada); Thomadsen, Bruce R. [University of Wisconsin, Madison, WI (United States); Purdy, James A. [University of California-Davis, Sacramento, CA (United States); Deye, James A. [National Cancer Institute, Bethesda, MD (United States)

2008-05-01T23:59:59.000Z

131

Atmospheric Radiation Measurement Program - unmanned aerospace vehicle: The follow-on phase  

SciTech Connect (OSTI)

Unmanned Aerospace Vehicle (UAV) demonstration flights (UDF) are designed to provide an early demonstration of the scientific utility of UAVs by using an existing UAV and instruments to measure broadband radiative flux profiles under clear sky conditions. UDF is but the first of three phases of ARM-UAV. The second phase significantly extends both the UAV measurement techniques and the available instrumentation to allow both multi-UAV measurements in cloudy skies and extended duration measurements in the tropopause. These activities build naturally to the third and final phase, that of full operational capability, i.e., UAVs capable of autonomous operations at 20-km altitudes for multiple days with a full suite of instrumentation for measuring radiative flux, cloud properties, and water vapor profiles.

Vitko, J. Jr. [Sandia National Labs., Livermore, CA (United States)

1995-04-01T23:59:59.000Z

132

Atmospheric radiation measurement unmanned aerospace vehicle (ARM-UAV) program  

SciTech Connect (OSTI)

ARM-UAV is part of the multi-agency U.S. Global Change Research Program and is addressing the largest source of uncertainty in predicting climatic response: the interaction of clouds and the sun`s energy in the Earth`s atmosphere. An important aspect of the program is the use of unmanned aerospace vehicles (UAVs) as the primary airborne platform. The ARM-UAV Program has completed two major flight series: The first series conducted in April, 1994, using an existing UAV (the General Atomics Gnat 750) consisted of eight highly successful flights at the DOE climate site in Oklahoma. The second series conducted in September/October, 1995, using two piloted aircraft (Egrett and Twin Otter), featured simultaneous measurements above and below clouds and in clear sky. Additional flight series are planned to continue study of the cloudy and clear sky energy budget in the Spring and Fall of 1996 over the DOE climate site in Oklahoma. 3 refs., 4 figs., 1 tab.

Bolton, W.R. [Sandia National Laboratories, Livermore, CA (United States)

1996-11-01T23:59:59.000Z

133

Simultaneous Spectral Albedo Measurements Near the Atmospheric Radiation Measurement Southern Great Plains (ARM SGP) Central Facility  

SciTech Connect (OSTI)

In this study, a data analysis is performed to determine the area-averaged, spectral albedo at ARM's SGP central facility site. The spectral albedo is then fed into radiation transfer models to show that the diffuse discrepancy is diminished when the spectral albedo is used (as opposed to using the broadband albedo).

Michalsky, Joseph J.; Min, Qilong; Barnard, James C.; Marchand, Roger T.; Pilewskie, Peter

2003-04-30T23:59:59.000Z

134

Proceedings of the third Atmospheric Radiation Measurement (ARM) science team meeting  

SciTech Connect (OSTI)

This document contains the summaries of papers presented at the 1993 Atmospheric Radiation Measurement (ARM) Science Team meeting held in Morman, Oklahoma. To put these papers in context, it is useful to consider the history and status of the ARM Program at the time of the meeting. Individual papers have been cataloged separately.

Not Available

1994-03-01T23:59:59.000Z

135

An Improved Multipyranometer Array for the Measurement of Direct and Diffuse Solar Radiation  

E-Print Network [OSTI]

array (MPA). The earliest work on an MPA related device for measuring diffuse sky radiation was performed in Finland by M. H2milllien et al. (1985). Further development on the MPA was performed in several countries including the United States where...

Munger, B.; Haberl, J. S.

1994-01-01T23:59:59.000Z

136

Diurnal Variations of Albedo Retrieved from Earth Radiation Budget Experiment Measurements  

Science Journals Connector (OSTI)

Five years of measurements from the Earth Radiation Budget Satellite (ERBS) have been analyzed to define the diurnal cycle of albedo from 55°N to 55°S. The ERBS precesses through all local times every 72 days so as to provide data regarding the ...

David A. Rutan; G. Louis Smith; Takmeng Wong

2014-12-01T23:59:59.000Z

137

Atmospheric Radiation Measurement Climate Research Facility (ACRF Instrumentation Status: New, Current, and Future)  

SciTech Connect (OSTI)

The purpose of this report is to provide a concise but comprehensive overview of Atmospheric Radiation Measurement Climate Research Facility instrumentation status. The report is divided into the following four sections: (1) new instrumentation in the process of being acquired and deployed, (2) existing instrumentation and progress on improvements or upgrades, (3) proposed future instrumentation, and (4) Small Business Innovation Research instrument development.

JW Voyles

2008-01-30T23:59:59.000Z

138

ON THE SUITABILITY OF LONGITUDINAL PROFILE MEASUREMENTS USING COHERENT SMITH-PURCELL RADIATION  

E-Print Network [OSTI]

Kittelmann, C. Thomas, ESS, Lund, Sweden Abstract The use of Smith-Purcell radiation to measure electrons power, it is mandatory to understand the beam dynamics and to determine the beam size and profile with precision. In high power proton Linacs, such under- standing would allow a full characterization of the beam

Boyer, Edmond

139

Low Frequency Measurement of the Spectrum of the Cosmic Background Radiation  

DOE R&D Accomplishments [OSTI]

We have made measurements of the cosmic background radiation spectrum at 5 wavelengths (0.33, 0.9, 3, 6.3, and 12 cm) using radiometers with wavelength-scaled corrugated horn antennas having very low sidelobes. A single large-mouth (0.7 m diameter) liquid-helium-cooled absolute reference load was used for all five radiometers. The results of the observations are consistent with previous measurements and represent a significant improvement in accuracy.

Smoot, G. F.; De Amici, G.; Friedman, S. D.; Witebsky, C.; Mandolesi, N.; Partridge, R. B.; Sironi, G.; Danese, L.; De Zotti, G.

1983-06-00T23:59:59.000Z

140

A study of acceleration noise as a measurement of the quality of freeway operation  

E-Print Network [OSTI]

A STUDY OF ACCELERATION NOISE AS A MEAS~ OF THE QUALITY OF FREEWAY OPERATION A Thesis CONRAD LOUIS DUDEK Submitted to the Graduate College of the Texas Al&l University in partial fulfillment of the requirements for the degree of MASTER... offered many constructive criticisms during the course of this study. Special acknowledgment is made to Dr, Donald R. Drew, His initial conception of the importance aud relative merits of the application of' acceleration noise as a measurement...

Dudek, Conrad L

1965-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiation measurement quality" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

An assessment of remediation measures and effects on groundwater quality at the Oneida County Sanitary Landfill  

SciTech Connect (OSTI)

The Oneida County Sanitary Landfill has operated from 1979 to the present. The four existing landfill cells were constructed based on standards that existed at their time of development from 1979 to 1995. The landfill was initially permitted as a natural attenuation landfill with a silt soil base liner and top cover. Groundwater sampling at the site showed that many constituents exceeded Wisconsin Administrative Code Chapter NR 140 (NR 140) standards throughout the 1980s. Measures that were implemented to remediate landfill impacts on groundwater quality included installation of a leachate/gas extraction system in 1990 and construction of a composite final cover over completed cells in 1994. In 1994, an Environmental Contamination Assessment (ECA) was conducted in accordance with NR 140 to evaluate landfill performance, groundwater quality trends, and future monitoring/remediation measures. Since implementation of the gas/leachate extraction system, there has been a reduction in detected volatile organic compounds in leachate, gas, gas condensate, and groundwater quality samples. Continued monitoring is necessary to evaluate remediation measures.

McGuire, P.; Otterson, S. [Rust Environment & Infrastructure, Sheboygan, WI (United States); Welhouse, G. [Environmental Compliance Consultants, Oshkosh, WI (United States)] [and others

1995-12-31T23:59:59.000Z

142

5Calculating Total Radiation Dosages at Mars The NASA, Mars Radiation Environment Experiment (MARIE) measured the daily  

E-Print Network [OSTI]

Radiation for astronauts orbiting Mars. The biggest uncertainty is in the SPE dose estimate. We had important than GCRs as a source of radiation? Explain why or why not in terms of estimation uncertainties5Calculating Total Radiation Dosages at Mars The NASA, Mars Radiation Environment Experiment (MARIE

143

Measuring Hawking Radiation of a Kerr-Newman Black Hole in a Superconducting Transmission Line  

E-Print Network [OSTI]

Applying a dimensional reduction technique and a coordinates transformation approach, we deduce the Kerr-Newman space-time into a Painlev\\'{e}-like form, and obtain its corresponding event horizon and the Hawking radiation temperature. We find that, the event horizon of a Kerr-Newman black hole can be simulated in a superconducting transmission line. Moreover, by running some numerical simulation, we confirm that the Hawking radiation of a Kerr-Newman Black Hole can be experimentally measured in a superconducting transmission line.

X. G. Lan; D. Y. Chen; L. F. Wei

2014-01-15T23:59:59.000Z

144

Electron density and temperature measurement by continuum radiation emitted from weakly ionized atmospheric pressure plasmas  

SciTech Connect (OSTI)

The electron-atom neutral bremsstrahlung continuum radiation emitted from weakly ionized plasmas is investigated for electron density and temperature diagnostics. The continuum spectrum in 450–1000?nm emitted from the argon atmospheric pressure plasma is found to be in excellent agreement with the neutral bremsstrahlung formula with the electron-atom momentum transfer cross-section given by Popovi?. In 280–450?nm, however, a large discrepancy between the measured and the neutral bremsstrahlung emissivities is observed. We find that without accounting for the radiative H{sub 2} dissociation continuum, the temperature, and density measurements would be largely wrong, so that it should be taken into account for accurate measurement.

Park, Sanghoo; Choe, Wonho, E-mail: wchoe@kaist.ac.kr [Department of Physics, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701 (Korea, Republic of); Youn Moon, Se [High-enthalpy Plasma Research Center, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju 561-756 (Korea, Republic of); Park, Jaeyoung [5771 La Jolla Corona Drive, La Jolla, CA 92037 (United States)

2014-02-24T23:59:59.000Z

145

A Leakage Current-based Measurement of the Radiation Damage in the ATLAS Pixel Detector  

E-Print Network [OSTI]

A measurement has been made of the radiation damage incurred by the ATLAS Pixel Detector barrel silicon modules from the beginning of operations through the end of 2012. This translates to hadronic fluence received over the full period of operation at energies up to and including 8 TeV. The measurement is based on a per-module measurement of the silicon sensor leakage current. The results are presented as a function of integrated luminosity and compared to predictions by the Hamburg Model. This information can be used to predict limits on the lifetime of the Pixel Detector due to current, for various operating scenarios.

Gorelov, Igor V

2015-01-01T23:59:59.000Z

146

Method and apparatus for measuring solar radiation in a vegetative canopy  

DOE Patents [OSTI]

An apparatus and method for measuring solar radiation received in a vegetative canopy. A multiplicity of sensors selectively generates electrical signals in response to impinging photosynthetically active radiation in sunlight. Each sensor is attached to a plant within the canopy and is electrically connected to a separate port in a junction box having a multiplicity of ports. Each port is connected to an operational amplifier. Each amplifier amplifies the signals generated by the sensors. Each amplifier is connected to an analog-to-digital convertor which digitizes each signal. A computer is connected to the convertors and accumulates and stores solar radiation data. A data output device such as a printer is connected to the computer and displays the data.

Gutschick, V.P.; Barron, M.H.; Waechter, D.A.; Wolf, M.A.

1985-04-30T23:59:59.000Z

147

Method and apparatus for measuring solar radiation in a vegetative canopy  

DOE Patents [OSTI]

An apparatus and method for measuring solar radiation received in a vegetative canopy. A multiplicity of sensors selectively generates electrical signals in response to impinging photosynthetically active radiation in sunlight. Each sensor is attached to a plant within the canopy and is electrically connected to a separate port in a junction box having a multiplicity of ports. Each port is connected to an operational amplifier. Each amplifier amplifies the signals generated by the sensors. Each amplifier is connected to an analog-to-digital convertor which digitizes each signal. A computer is connected to the convertors and accumulates and stores solar radiation data. A data output device such as a printer is connected to the computer and displays the data.

Gutschick, Vincent P. (Los Alamos, NM); Barron, Michael H. (Los Alamos, NM); Waechter, David A. (Los Alamos, NM); Wolf, Michael A. (Los Alamos, NM)

1987-01-01T23:59:59.000Z

148

Energy deposition and radiation quality of radon and radon daughters. Final report  

SciTech Connect (OSTI)

This program was aimed at creating a quantitative physical description, at the micrometer and nanometer levels, of the physical interactions of the alpha particles from radon and its daughters with cells at risk in the bronchial epithelium. The authors calculated alpha-particle energy spectra incident upon the cells and also energy deposition spectra in micrometer- and nanometer-sized sites as a function of cell depth, site size, airway diameter, activities of {sup 218}Po and {sup 214}Po, and other parameters. These data are now being applied, using biophysical models of radiation effects, to predict cell killing, mutations, and cell transformation. The model predictions are then compared to experimental biophysical, biochemical, and biological information. These studies contribute to a detailed understanding of the mechanisms of the biological effectiveness of the radiations emitted by radon and its progeny.

Karam, L.R.; Caswell, R.S.

1996-09-09T23:59:59.000Z

149

Blast wave radiation source measurement experiments on the Z Z-pinch facility  

SciTech Connect (OSTI)

The Dynamic Hohlraum (DH) radiation on the Z facility at Sandia National Laboratories [R. B. Spielman, W. A. Stygar, J. F. Seamen et al., Proceeding of the 11th International Pulsed Power Conference, Baltimore, 1997, edited by G. Cooperstein and I. Vitkovitsky (IEEE, Piscataway, NJ, 1997), Vol. 1, p. 709] is a bright source of radiant energy that has proven useful for high energy density physics experiments. But the radiation output from a DH on Z needs to be well known. In this paper, a new method is presented for measuring the radiation fluence deposited in an experiment, specifically, an experiment driven by a Z DH. This technique uses a blast wave produced in a SiO{sub 2} foam, which starts as supersonic but transitions to subsonic, producing a shock at the transition point that is observable via radiography. The position of this shock is a sensitive measure of the radiation drive energy from the Z DH. Computer simulations have been used to design and analyze a Z foam blast wave experiment.

Peterson, R.R.; Peterson, D.L.; Watt, R.G.; Idzorek, G.; Tierney, T.; Lopez, M. [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)

2006-05-15T23:59:59.000Z

150

DOE/EA-1193: Environmental Assessment for the Atmospheric Radiation Measurement (ARM) Program North Slope of Alaska and Adjacent Artic Ocean Cloud and Radiation Testbed (CART) Site (February 1997)  

Broader source: Energy.gov (indexed) [DOE]

u. S. DEPARTMENT OF ENERGY u. S. DEPARTMENT OF ENERGY FINDING OF NO SIGNIFICANT IMPACT FINAL ENVIRONMENTAL ASSESSMENT - The United States Department of Energy (DOE) has prepared an environmental assessment (EA) for the Atmospheric Radiation Measurement Cloud and Radiation Testbed (ARM/CART), North Slope of Alaska and Adjacent Arctic Ocean. The purpose of the ARM/CART program is to collect and analyze atmospheric data for the development and validation of global climate change models. The program involves construction of several small facilities and operation of sensing equipment. The EA analyzes the impacts on land use, tundra, air quality, cultura.l resources, socioeconomics, and wildlife. Separate studies (summarized in the EA) were also conducted to ensure that the operation of the facilities would not

151

Improved Methodology to Measure Normal Incident Solar Radiation with a Multi-Pyranometer Array  

E-Print Network [OSTI]

and south sensors and one for the east and west sensors. The solution for the east and west sensors is expanded to two new solutions by mirroring their readings according to the solar noon; each real measurement and its mirrored values generate a solution..., which was originally developed approximately 30 years back, Hämäläinen et al. [1] developed an instrument, which included 25 solar radiation sensors mounted on a metal hemisphere. Since then, many other have further studied how to simplify...

Baltazar, Juan Carlos; Haberl, Jeff; Sun, Yifu

152

Lowering the Light Speed Isotropy Limit: European Synchrotron Radiation Facility Measurements  

E-Print Network [OSTI]

The measurement of the Compton edge of the scattered electrons in GRAAL facility in European Synchrotron Radiation Facility (ESRF) in Grenoble with respect to the Cosmic Microwave Background dipole reveals up to 10 sigma variations larger than the statistical errors. We now show that the variations are not due to the frequency variations of the accelerator. The nature of Compton edge variations remains unclear, thus outlining the imperative of dedicated studies of light speed anisotropy.

V. G. Gurzadyan; J. -P. Bocquet; A. Kashin; A. Margarian; O. Bartalini; V. Bellini; M. Castoldi; A. D'Angelo; J. -P. Didelez; R. Di Salvo; A. Fantini; G. Gervino; F. Ghio; B. Girolami; A. Giusa; M. Guidal; E. Hourany; S. Knyazyan; V. Kouznetsov; R. Kunne; A. Lapik; P. Levi Sandri; A. Lleres; S. Mehrabyan; D. Moricciani; V. Nedorezov; C. Perrin; D. Rebreyend; G. Russo; N. Rudnev; C. Schaerf; M. -L. Sperduto; M. -C. Sutera; A. Turinge

2007-01-05T23:59:59.000Z

153

Gamma spectroscopic measurements using the PID350 pixelated CdTe radiation detector  

E-Print Network [OSTI]

Spectroscopic measurements are presented using the PID350 pixelated gamma radiation detectors. A high-speed data acquisition system has been developed in order to reduce the data loss during the data reading in case of a high flux of photons. A data analysis framework has been developed in order to improve the resolution of the acquired energy spectra, using specific calibration parameters for each PID350's pixel. Three PID350 detectors have been used to construct a stacked prototype system and spectroscopic measurements have been performed in order to test the ability of the prototype to localize radioactive sources.

Karafasoulis, K; Seferlis, S; Papadakis, I; Loukas, D; Lambropoulos, C; Potiriadis, C

2010-01-01T23:59:59.000Z

154

Characteristic measurements of silicon dioxide aerogel plasmas generated in a Planckian radiation environment  

SciTech Connect (OSTI)

The temporally and spatially resolved characteristics of silicon dioxide aerogel plasmas were studied using x-ray spectroscopy. The plasma was generated in the near-Planckian radiation environment within gold hohlraum targets irradiated by laser pulses with a total energy of 2.4 kJ in 1 ns. The contributions of silicon ions at different charge states to the specific components of the measured absorption spectra were also investigated. It was found that each main feature in the absorption spectra of the measured silicon dioxide aerogel plasmas was contributed by two neighboring silicon ionic species.

Dong Quanli; Wang Shoujun; Li Yutong; Zhang Yi; Zhao Jing [Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China); Wei Huigang; Shi Jianrong; Zhao Gang [National Astronomical Observatories of China, Chinese Academy of Sciences, Beijing 100012 (China); Zhang Jiyan; Gu Yuqiu; Ding Yongkun; Wen Tianshu; Zhang Wenhai; Hu Xin; Liu Shenye; Zhang Lin; Tang Yongjian; Zhang Baohan; Zheng Zhijian [Research Center for Laser Fusion, China Academy of Engineering Physics, Mianyang 621900 (China); Nishimura, Hiroaki [Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka 565-0871 (Japan)

2010-01-15T23:59:59.000Z

155

Method of controlling coherent synchroton radiation-driven degradation of beam quality during bunch length compression  

SciTech Connect (OSTI)

A method of avoiding CSR induced beam quality defects in free electron laser operation by a) controlling the rate of compression and b) using a novel means of integrating the compression with the remainder of the transport system: both are accomplished by means of dispersion modulation. A large dispersion is created in the penultimate dipole magnet of the compression region leading to rapid compression; this large dispersion is demagnified and dispersion suppression performed in a final small dipole. As a result, the bunch is short for only a small angular extent of the transport, and the resulting CSR excitation is small.

Douglas, David R. (Newport News, VA); Tennant, Christopher D. (Williamsburg, VA)

2012-07-10T23:59:59.000Z

156

Evaluation of the soft measures' effects on ambient water quality improvement and household and industry economies  

Science Journals Connector (OSTI)

Abstract Various ecological footprint calculators, carbon footprint calculators and water footprint calculators have been developed in recent years. The basic concepts of ecological behaviour record notebooks and of carbon dioxide emission calculators have been developed since the late 20th century. The first carbon dioxide emission calculator was developed in 1991. Likewise, water pollutant discharge calculators have been developed to estimate the effects of soft measures introduced into households to reduce pollutant discharge since 2004. The soft measures which have been developed in Japan may consist of a wider framework, household sustainable consumption, which has been developed in Europe, and can be referred to cleaner consumption. In this research, summarisation of the short history of ecological behaviour record notebooks and ecological footprint calculators in Japan since the 1980s was conducted, and the soft measures in households to reduce pollutant discharge were evaluated for their effects on ambient water quality improvement as well as household and industry economies. Effects of the soft measures on related industry economies were investigated using an Input–Output Table analysis and the effects of the imported goods were evaluated with an import effect matrix, which was developed in this research. The effects of the soft measures on household expenditures were estimated to be a decrease by 2.5% or USD 285 person?1 year?1 in 2003–2006. The results show that the soft measures positively affect the chemical fibre industry and significantly affect the detergent industry. Analysis of the import effect matrix proved that the six industries were tightly related through extensive amounts of imported goods. The soft measures in households may lead to household sustainable consumption and thus reduce disadvantageous human impacts on water environments. The effects of the measures introduced to improve the environment should be qualitatively and quantitatively evaluated to avoid redundant concerns and discord between the environment and the economy, which may be worried when the relationship is not well understood.

Yoshiaki Tsuzuki

2014-01-01T23:59:59.000Z

157

Measurement and control of brake pedal feel quality in automobile manufacturing  

E-Print Network [OSTI]

Customer perception of brake pedal feel quality, as related to the perception of the brake pedal feeling soft or mushy, depends on both the customer's subjective judgment of quality and the actual build quality of the brake ...

Cerilles, Jeffrey T. (Jeffrey Thomas)

2005-01-01T23:59:59.000Z

158

Bilateral implant reconstruction does not affect the quality of postmastectomy radiation therapy  

SciTech Connect (OSTI)

To determine if the presence of bilateral implants, in addition to other anatomic and treatment-related variables, affects coverage of the target volume and dose to the heart and lung in patients receiving postmastectomy radiation therapy (PMRT). A total of 197 consecutive women with breast cancer underwent mastectomy and immediate tissue expander (TE) placement, with or without exchange for a permanent implant (PI) before radiation therapy at our center. PMRT was delivered with 2 tangential beams + supraclavicular lymph node field (50 Gy). Patients were grouped by implant number: 51% unilateral (100) and 49% bilateral (97). The planning target volume (PTV) (defined as implant + chest wall + nodes), heart, and ipsilateral lung were contoured and the following parameters were abstracted from dose-volume histogram (DVH) data: PTV D{sub 95%} > 98%, Lung V{sub 20}Gy > 30%, and Heart V{sub 25}Gy > 5%. Univariate (UVA) and multivariate analyses (MVA) were performed to determine the association of variables with these parameters. The 2 groups were well balanced for implant type and volume, internal mammary node (IMN) treatment, and laterality. In the entire cohort, 90% had PTV D{sub 95%} > 98%, indicating excellent coverage of the chest wall. Of the patients, 27% had high lung doses (V{sub 20}Gy > 30%) and 16% had high heart doses (V{sub 25}Gy > 5%). No significant factors were associated with suboptimal PTV coverage. On MVA, IMN treatment was found to be highly associated with high lung and heart doses (both p < 0.0001), but implant number was not (p = 0.54). In patients with bilateral implants, IMN treatment was the only predictor of dose to the contralateral implant (p = 0.001). In conclusion, bilateral implants do not compromise coverage of the target volume or increase lung and heart dose in patients receiving PMRT. The most important predictor of high lung and heart doses in patients with implant-based reconstruction, whether unilateral or bilateral, is treatment of the IMNs. Refinement of radiation techniques in reconstructed patients who require comprehensive nodal irradiation is warranted.

Ho, Alice Y., E-mail: hoa1234@mskcc.org [Department of Radiation Oncology, Memorial Sloan-Kettering Cancer Center, New York, NY (United States); Patel, Nisha [Drexel University College of Medicine, Philadelphia, PA (United States); Ohri, Nisha [Department of Radiation Oncology, Mount Sinai School of Medicine, New York, NY (United States); Morrow, Monica [Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, New York (United States); Mehrara, Babak J.; Disa, Joseph J.; Cordeiro, Peter G. [Department of Plastic Surgery, Memorial Sloan-Kettering Cancer Center, New York, NY (United States); Shi, Weiji; Zhang, Zhigang [Department of Biostatistics and Epidemiology, Memorial Sloan-Kettering Cancer Center, New York, NY (United States); Gelblum, Daphna [Department of Radiation Oncology, Memorial Sloan-Kettering Cancer Center, New York, NY (United States); Nerbun, Claire T.; Woch, Katherine M.; Ballangrud, Ase [Department of Medical Physics, Memorial Sloan-Kettering Cancer Center, New York, NY (United States); McCormick, Beryl; Powell, Simon N. [Department of Radiation Oncology, Memorial Sloan-Kettering Cancer Center, New York, NY (United States)

2014-04-01T23:59:59.000Z

159

Measuring correlation of information quality dimensions using six sigma based product perspective.  

E-Print Network [OSTI]

??This research investigates the issues of information quality assessment and management. It takes information as a product, and examines how different information quality dimensions impact… (more)

Lee, Sang Hyun

2014-01-01T23:59:59.000Z

160

Evaluation of the Multi-scale Modeling Framework Using Data from the Atmospheric Radiation Measurement Program  

SciTech Connect (OSTI)

One of the goals of the Atmospheric Radiation Measurement (ARM) program is to provide long-term observations for evaluating and improving cloud and radiation treatment in global climate models. Unfortunately, the traditional parametric approach of diagnosing cloud and radiation properties for gridcells that are tens to hundreds kilometers across from large-scale model fields is not well suited for comparison with time series of ground based observations at selected locations. A recently emerging approach called a multi-scale modeling framework (MMF) has shown promise to bridge the scale gap. The MMF consists of a two-dimensional or small three-dimensional cloud resolving model (CRM) embedded into each grid column of the Community Atmospheric Model (CAM), thereby computing cloud properties at a scale that is more consistent with observations. We present a comparison of data from two ARM sites, one at the Southern Great Plains (SGP) in Oklahoma and one at Nauru Island in the Tropical Western Pacific (TWP) region, with output from both the CAM and MMF. Two sets of one year long simulations are considered: one using climatological sea surface temperatures (SST) and another using 1999 SST. Each set includes a run with the MMF as well as the CAM run with traditional or standard cloud and radiation treatment. Time series of cloud fraction, precipitation intensity, and downwelling solar radiation flux at the surface are statistically analyzed. For the TWP site, nearly all parameters of frequency distributions of these variables from the MMF run are shown to be more consistent with observation than those from the CAM run. This change is attributed to the improved representation of convective clouds in the MMF compared to the conventional climate model. For the SGP, the MMF shows little to no improvement in predicting the same quantities. Possible causes of this lack of improvement are discussed.

Ovtchinnikov, Mikhail; Ackerman, Thomas P.; Marchand, Roger T.; Khairoutdinov, Marat

2006-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiation measurement quality" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Evaluation of the Multi-Scale Modeling Framework using Data from the Atmospheric Radiation Measurement Program  

SciTech Connect (OSTI)

One of the goals of the Atmospheric Radiation Measurement (ARM) program was to provide long-term observations for evaluation of cloud and radiation treatment in global climate models. Unfortunately, traditional parametric approach of diagnosing cloud and radiation properties from large-scale model fields is not well suited for comparison with observed time series at selected locations. A recently emerging approach called the multi-scale modeling framework (MMF) has shown promise to bridge the gap. MMF consists of a two-dimensional cloud system resolving model (CSRM) embedded into each CAM grid column of the Community Atmospheric Model (CAM), thereby computing cloud properties at a scale that is more consistent with observations. Because the approach is computationally expensive only limited simulations have been carried out. In this presentation, we will present a comparison of data from two ARM sites, one at the Southern Great Plains (SGP) in Oklahoma and one at Nauru island in the Tropical Western Pacific (TWP) region, with output from both CAM and MMF. Two sets of one year long simulations are considered: one using climatological sea surface temperatures (SST) and another using 1999 SST. Each set includes a run with MMF as well as CAM run with traditional or standard cloud and radiation treatment. Time series of cloud fraction, precipitation intensity, and downwelling solar radiation flux at the surface are statistically analyzed. For the TWP site, nearly all parameters of frequency distributions of these variables from MMF run are shown to be more consistent with observation than those from CAM run. For the SGP, the improvements are marginal.

Ovchinnikov, Mikhail; Ackerman, Thomas P.; Marchand, Roger T.; Khairoutdinov, Marat

2004-07-01T23:59:59.000Z

162

Atmospheric Radiation Measurement (ARM) Data from the Southern Great Plains (SGP) Site  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

The Atmospheric Radiation Measurement (ARM) Program is the largest global change research program supported by the U.S. Department of Energy. The primary goal of the ARM Program is to improve the treatment of cloud and radiation physics in global climate models in order to improve the climate simulation capabilities of these models. To achieve this goal, ARM scientists and researchers around the world use continuous data obtained through the ARM Climate Research Facility. ARM maintains four major, permanent sites for data collection and deploys the ARM Mobile Facility to other sites as determined. Scientists are using the information obtained from the permanent SGP site to improve cloud and radiative models and parameterizations and, thereby, the performance of atmospheric general circulation models used for climate research. More than 30 instrument clusters have been placed around the SGP site. The locations for the instruments were chosen so that the measurements reflect conditions over the typical distribution of land uses within the site. The continuous observations at the SGP site are supplemented by intensive observation periods, when the frequency of measurements is increased and special measurements are added to address specific research questions. During such periods, 2 gigabytes or more of data (two billion bytes) are generated daily. SGP data sets from 1993 to the present reside in the ARM Archive at http://www.archive.arm.gov/ http. Users will need to register for a password, but all files are then free for viewing or downloading. The ARM Archive physically resides at the Oak Ridge National Laboratory.

163

Efficient and reliable 3D dose quality assurance for IMRT by combining independent dose calculations with measurements  

SciTech Connect (OSTI)

Purpose: Advanced radiotherapy treatments require appropriate quality assurance (QA) to verify 3D dose distributions. Moreover, increase in patient numbers demand efficient QA-methods. In this study, a time efficient method that combines model-based QA and measurement-based QA was developed; i.e., the hybrid-QA. The purpose of this study was to determine the reliability of the model-based QA and to evaluate time efficiency of the hybrid-QA method. Methods: Accuracy of the model-based QA was determined by comparison of COMPASS calculated dose with Monte Carlo calculations for heterogeneous media. In total, 330 intensity modulated radiation therapy (IMRT) treatment plans were evaluated based on the mean gamma index (GI) with criteria of 3%/3mm and classification of PASS (GI {<=} 0.4), EVAL (0.4 < GI > 0.6), and FAIL (GI {>=} 0.6). Agreement between model-based QA and measurement-based QA was determined for 48 treatment plans, and linac stability was verified for 15 months. Finally, time efficiency improvement of the hybrid-QA was quantified for four representative treatment plans. Results: COMPASS calculated dose was in agreement with Monte Carlo dose, with a maximum error of 3.2% in heterogeneous media with high density (2.4 g/cm{sup 3}). Hybrid-QA results for IMRT treatment plans showed an excellent PASS rate of 98% for all cases. Model-based QA was in agreement with measurement-based QA, as shown by a minimal difference in GI of 0.03 {+-} 0.08. Linac stability was high with an average GI of 0.28 {+-} 0.04. The hybrid-QA method resulted in a time efficiency improvement of 15 min per treatment plan QA compared to measurement-based QA. Conclusions: The hybrid-QA method is adequate for efficient and accurate 3D dose verification. It combines time efficiency of model-based QA with reliability of measurement-based QA and is suitable for implementation within any radiotherapy department.

Visser, R. [Department of Radiation Oncology, University of Groningen, University Medical Center Groningen, Groningen 9700 RB (Netherlands); Hanze University of Applied Sciences, Groningen 9714 CE (Netherlands); Wauben, D. J. L.; Godart, J.; Langendijk, J. A.; Veld, A. A. van't; Korevaar, E. W. [Department of Radiation Oncology, University of Groningen, University Medical Center Groningen, Groningen 9700 RB (Netherlands); Groot, M. de [Hanze University of Applied Sciences, Groningen 9714 CE (Netherlands)

2013-02-15T23:59:59.000Z

164

Measuring Perceived Quality of Speech and Video in Multimedia Conferencing Applications  

E-Print Network [OSTI]

and applications not only need to know optimal conditions for successful task completion, but theminimum quality

Sasse, Angela

165

NREL Solar Radiation Research Laboratory (SRRL): Baseline Measurement System (BMS); Golden, Colorado (Data)  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

The SRRL was established at the Solar Energy Research Institute (now NREL) in 1981 to provide continuous measurements of the solar resources, outdoor calibrations of pyranometers and pyrheliometers, and to characterize commercially available instrumentation. The SRRL is an outdoor laboratory located on South Table Mountain, a mesa providing excellent solar access throughout the year, overlooking Denver. Beginning with the basic measurements of global horizontal irradiance, direct normal irradiance and diffuse horizontal irradiance at 5-minute intervals, the SRRL Baseline Measurement System now produces more than 130 data elements at 1-min intervals that are available from the Measurement & Instrumentation Data Center Web site. Data sources include global horizontal, direct normal, diffuse horizontal (from shadowband and tracking disk), global on tilted surfaces, reflected solar irradiance, ultraviolet, infrared (upwelling and downwelling), photometric and spectral radiometers, sky imagery, and surface meteorological conditions (temperature, relative humidity, barometric pressure, precipitation, snow cover, wind speed and direction at multiple levels). Data quality control and assessment include daily instrument maintenance (M-F) with automated data quality control based on real-time examinations of redundant instrumentation and internal consistency checks using NREL's SERI-QC methodology. Operators are notified of equipment problems by automatic e-mail messages generated by the data acquisition and processing system. Radiometers are recalibrated at least annually with reference instruments traceable to the World Radiometric Reference (WRR).

Stoffel, T.; Andreas, A.

166

The effect of different adaptation strengths on image quality and radiation dose using Siemens Care Dose 4D  

Science Journals Connector (OSTI)

......undertaking strategies for CT radiation dose optimisation...supported by the Swedish Radiation Safety Authority (SSI P 1579...4D new technique for radiation dose reduction. SOMATOM...Application Guide. Software Version syngo CT 2005A......

Marcus Söderberg; Mikael Gunnarsson

2010-01-01T23:59:59.000Z

167

Radiation from a uniformly accelerated particle detector: Energy, particles, and the quantum measurement process  

Science Journals Connector (OSTI)

We comment on the controversy whether a uniformly accelerated particle detector radiates. We stress the particular importance of the built-up correlations and of the quantum measurement process in this connection. We give the question the following form: We assume that the initial state of the quantum field is the Minkowski vacuum and that there is a uniformly accelerated two-level system which is initially in its ground state. What will in this case be found in the different regions of asymptotic future null infinity for the mean value of the field energy density on one hand and of the Minkowski particle number on the other if in the out region (a) no measurement is made on the two-level system, (b) the measurement finds the two-level system in its upper state, or (c) in its lower state? To obtain localized statements, we base the calculations on wave packet states. The different cases show essential differences.

Jürgen Audretsch and Rainer Müller

1994-06-15T23:59:59.000Z

168

Alpha Radiation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Basics of Radiation Basics of Radiation Gamma Radiation and X-Rays Beta Radiation Alpha Radiation Irradiation Radioactive Contamination Definitions Detection Measurement Safety Around Radiation Sources Types of Radiation Exposure Managing Radiation Emergencies Basics of Radiation Characteristics of Alpha Radiation 1. Alpha radiation is not able to penetrate skin. 2. Alpha-emitting materials can be harmful to humans if the materials are inhaled, swallowed, or absorbed through open wounds. 3. A variety of instruments have been designed to measure alpha radiation. Special training in use of these instruments is essential for making accurate measurements. 4. A civil defense instrument (CD V-700) cannot detect the presence of radioactive materials that produce alpha radiation unless the radioactive materials also produce beta and/or gamma radiation.

169

Measurement of radiative widths of $a_2(1320)$ and $?_2(1670)$  

E-Print Network [OSTI]

The COMPASS Collaboration at CERN has investigated the reaction $\\pi^- \\gamma \\rightarrow \\pi^-\\pi^-\\pi^+$ embedded in the Primakoff reaction of $190~\\textrm{GeV}$ pions scattering in the Coulomb field of a lead target, $\\pi^- \\text{Pb} \\rightarrow \\pi^-\\pi^-\\pi^+ \\text{Pb}$. Exchange of quasi-real photons is selected by isolating the sharp Coulomb peak observed at momentum transfer below $0.001~(\\text{GeV}/c)^2$. Using a partial-wave analysis the amplitudes and relative phases of the $a_2(1320)$ and $\\pi_2(1670)$ mesons have been extracted, and the Coulomb and the diffractive contributions have been disentangled. Measuring absolute production cross sections we have determined the radiative width of the $a_2(1320)$ to be $\\Gamma_0(a_2(1320) \\rightarrow \\pi\\gamma) = (358 \\pm 6_{\\textrm{stat}} \\pm 42_{\\textrm{syst}})~\\textrm{keV}$. As the first measurement, $\\Gamma_0(\\pi_2(1670) \\rightarrow \\pi\\gamma) = (181 \\pm 11_{\\textrm{stat}} \\pm 27_{\\textrm{syst}})~\\textrm{keV} \\cdot (\\textrm{BR}^{\\textrm{PDG}}_{f_2 \\pi}/\\textrm{BR}_{f_2 \\pi})$ is obtained for the radiative width of the $\\pi_2(1670)$, where in this analysis the branching ratio $\\textrm{BR}^{\\textrm{PDG}}_{f_2 \\pi}=0.56$ has been used. We compare these values to previous measurements and theoretical predictions.

C. Adolph; R. Akhunzyanov; M. G. Alekseev; G. D. Alexeev; A. Amoroso; V. Andrieux; V. Anosov; A. Austregesilo; B. Badelek; F. Balestra; J. Barth; G. Baum; R. Beck; Y. Bedfer; A. Berlin; J. Bernhard; K. Bicker; J. Bieling; R. Birsa; J. Bisplinghoff; M. Bodlak; M. Boer; P. Bordalo; F. Bradamante; C. Braun; A. Bressan; M. Buechele; E. Burtin; L. Capozza; M. Chiosso; S. U. Chung; A. Cicuttin; M. L. Crespo; Q. Curiel; S. Dalla Torre; S. S. Dasgupta; S. Dasgupta; O. Yu. Denisov; S. V. Donskov; N. Doshita; V. Duic; W. Duennweber; M. Dziewiecki; A. Efremov; C. Elia; P. D. Eversheim; W. Eyrich; M. Faessler; A. Ferrero; A. Filin; M. Finger; M. Finger~jr.; H. Fischer; C. Franco; N. du~Fresne~von~Hohenesche; J. M. Friedrich; V. Frolov; F. Gautheron; O. P. Gavrichtchouk; S. Gerassimov; R. Geyer; I. Gnesi; B. Gobbo; S. Goertz; M. Gorzellik; S. Grabmueller; A. Grasso; B. Grube; A. Guskov; T. Guthoerl; F. Haas; D. von Harrach; D. Hahne; R. Hashimoto; F. H. Heinsius; F. Herrmann; F. Hinterberger; Ch. Hoeppner; N. Horikawa; N. d'Hose; S. Huber; S. Ishimoto; A. Ivanov; Yu. Ivanshin; T. Iwata; R. Jahn; V. Jary; P. Jasinski; P. Joerg; R. Joosten; E. Kabuss; B. Ketzer; G. V. Khaustov; Yu. A. Khokhlov; Yu. Kisselev; F. Klein; K. Klimaszewski; J. H. Koivuniemi; V. N. Kolosov; K. Kondo; K. Koenigsmann; I. Konorov; V. F. Konstantinov; A. M. Kotzinian; O. Kouznetsov; Z. Kral; M. Kraemer; Z. V. Kroumchtein; N. Kuchinski; F. Kunne; K. Kurek; R. P. Kurjata; A. A. Lednev; A. Lehmann; S. Levorato; J. Lichtenstadt; A. Maggiora; A. Magnon; N. Makke; G. K. Mallot; C. Marchand; A. Martin; J. Marzec; J. Matousek; H. Matsuda; T. Matsuda; G. Meshcheryakov; W. Meyer; T. Michigami; Yu. V. Mikhailov; Y. Miyachi; A. Nagaytsev; T. Nagel; F. Nerling; S. Neubert; D. Neyret; V. I. Nikolaenko; J. Novy; W. -D. Nowak; A. S. Nunes; I. Orlov; A. G. Olshevsky; M. Ostrick; R. Panknin; D. Panzieri; B. Parsamyan; S. Paul; M. Pesek; S. Platchkov; J. Pochodzalla; V. A. Polyakov; J. Pretz; M. Quaresma; C. Quintans; S. Ramos; G. Reicherz; E. Rocco; A. Rychter; N. S. Rossiyskaya; D. I. Ryabchikov; V. D. Samoylenko; A. Sandacz; S. Sarkar; I. A. Savin; G. Sbrizzai; P. Schiavon; C. Schill; T. Schlueter; A. Schmidt; K. Schmidt; H. Schmieden; K. Schoenning; S. Schopferer; M. Schott; O. Yu. Shevchenko; L. Silva; L. Sinha; S. Sirtl; M. Slunecka; S. Sosio; F. Sozzi; A. Srnka; L. Steiger; M. Stolarski; M. Sulc; R. Sulej; H. Suzuki; A. Szabelski; T. Szameitat; P. Sznajder; S. Takekawa; J. ter~Wolbeek; S. Tessaro; F. Tessarotto; F. Thibaud; S. Uhl; I. Uman; M. Vandenbroucke; M. Virius; J. Vondra; L. Wang; T. Weisrock; M. Wilfert; R. Windmolders; H. Wollny; K. Zaremba; M. Zavertyaev; E. Zemlyanichkina; M. Ziembicki.

2014-03-11T23:59:59.000Z

170

DOE/SC-ARM-020 Atmospheric Radiation Measurement Climate Research Facility  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

20 20 Atmospheric Radiation Measurement Climate Research Facility Operations Quarterly Report July 1-September 30, 2013 DISCLAIMER This report was prepared as an account of work sponsored by the U.S. Government. Neither the United States nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or

171

DOE/SC-ARM-12-021 Atmospheric Radiation Measurement Climate Research Facility  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1 1 Atmospheric Radiation Measurement Climate Research Facility Operations Quarterly Report July 1-September 30, 2012 DISCLAIMER This report was prepared as an account of work sponsored by the U.S. Government. Neither the United States nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or

172

DOE/SC-ARM-13-020 Atmospheric Radiation Measurement Climate Research Facility  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

0 0 Atmospheric Radiation Measurement Climate Research Facility Operations Quarterly Report July 1-September 30, 2013 DISCLAIMER This report was prepared as an account of work sponsored by the U.S. Government. Neither the United States nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or

173

Dual-Readout Calorimetry for High-Quality Energy Measurements. Final Report  

SciTech Connect (OSTI)

This document constitutes the final report on the project Dual-Readout Calorimetry for High-Quality Energy Measurements. The project was carried out by a consortium of US and Italian physicists, led by Dr. Richard Wigmans (Texas tech University). This consortium built several particle detectors and tested these at the European Center for Nuclear Research (CERN) in Geneva, Switzerland. The idea arose to use scintillating crystals as dual-readout calorimeters. Such crystals were of course already known to provide excellent energy resolution for the detection of particles developing electromagnetic (em) showers. The efforts to separate the signals from scintillating crystals into scintillation and Cerenkov components led to four different methods by which this could be accomplished. These methods are based on a) the directionality, b) spectral differences, c) the time structure, and d) the polarization of the signals.

Wigmans, Richard; Nural, Akchurin

2013-09-01T23:59:59.000Z

174

Atmospheric Radiation Measurement (ARM) Data from the North Slope Alaska (NSA) Site  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

The Atmospheric Radiation Measurement (ARM) Program is the largest global change research program supported by the U.S. Department of Energy. The primary goal of the ARM Program is to improve the treatment of cloud and radiation physics in global climate models in order to improve the climate simulation capabilities of these models. To achieve this goal, ARM scientists and researchers around the world use continuous data obtained through the ARM Climate Research Facility. ARM maintains four major, permanent sites for data collection and deploys the ARM Mobile Facility to other sites as determined. The North Slope of Alaska (NSA) site is a permanent site providing data about cloud and radiative processes at high latitudes. These data are being used to refine models and parameterizations as they relate to the Arctic. Centered at Barrow and extending to the south (to the vicinity of Atqasuk), west (to the vicinity of Wainwright), and east (towards Oliktok), the NSA site has become a focal point for atmospheric and ecological research activity on the North Slope. Approximately 300,000 NSA data sets from 1993 to the present reside in the ARM Archive at http://www.archive.arm.gov/. Users will need to register for a password, but all files are then free for viewing or downloading. The ARM Archive physically resides at the Oak Ridge National Laboratory.

175

State background-radiation levels: results of measurements taken during 1975-1979  

SciTech Connect (OSTI)

Background radiation levels across the United States have been measured by the Off-Site Pollutant Measurements Group of the Health and Safety Research Division at Oak Ridge National Laboratory (ORNL). These measurements have been conducted as part of the ORNL program of radiological surveillance at inactive uranium mills and sites formerly utilized during Manhattan Engineer District and early Atomic Energy Commission projects. The measurements included determination of /sup 226/Ra, /sup 232/Th, and /sup 238/U concentrations in surface soil samples and measurement of external gamma-ray exposure rates at 1 m above the ground surface at the location of soil sampling. This information is being utilized for comparative purposes to determine the extent of contamination present at the survey sites and surrounding off-site areas. The sampling program to date has provided background information at 356 locations in 33 states. External gamma-ray exposure rates were found to range from less than 1 to 34 ..mu..R/h, with an US average of 8.5 ..mu..R/h. The nationwide average concentrations of /sup 226/Ra, /sup 232/Th, and /sup 238/U in surface soil were determined to be 1.1, 0.98, and 1.0 pCi/g, respectively.

Myrick, T.E.; Berven, B.A.; Haywood, F.F.

1981-11-01T23:59:59.000Z

176

Air/water subchannel measurements of the equilibrium quality and mass-flux distribution in a rod bundle. [BWR  

SciTech Connect (OSTI)

Subchannel measurements were performed in order to determine the equilibrium quality and mass flux distribution in a four rod bundle, using air/water flow. An isokinetic technique was used to sample the flow in the center, side and corner subchannels of this test section. Flow rates of the air and water in each sampled subchannel were measured. Experiments were performed for two test-section-average mass fluxes (0.333x10/sup 6/ and 0.666x10/sup 6/ lb/sub m//h-ft/sup 2/), and the test-section-average quality was varied from 0% to 0.54% for each mass flux. Single-phase liquid, bubbly, slug and churn-turbulent two-phase flow regimes were achieved. The observed data trends agreed with previous diabatic measurements in which the center subchannel had the highest quality and mass flux, while the corner subchannel had the lowest.

Sterner, R.W.; Lahey, R.T. Jr.

1983-07-01T23:59:59.000Z

177

Measurement of the Betatron Radiation Spectrum Coming From a Laser Wakefield Accelerator  

SciTech Connect (OSTI)

A Laser Wakefield Accelerator (LWFA) is under development at Lawrence Livermore National Laboratory (LLNL) to produce electron bunches with GeV class energy and energy spreads of a few-percent. The ultimate goal is to provide a bright and compact photon source for high energy density physics. The interaction of a high power (200 TW), short pulse (50 fs) laser with neutral He gas can generate quasi-monoenergetic electron beams at energies up to 1 GeV. The laser pulse can be self-guided over a dephasing length of 1 cm (for a plasma density of 1.5 x 10{sup 18} cm{sup -3}) overcoming the limitation of vacuum diffraction. Betatron radiation is emitted while the accelerated electrons undergo oscillations in the wakefield electrostatic field. Here we present electron spectra measurements with a two screen spectrometer allowing to fix the ambiguities due to electron deflections at the plasma exit. They have measured monoenergetic electron beams above 300 MeV. Furthermore a forward directed x-ray beam is observed. The measured betatron spectrum agrees well with the calculated spectrum in the synchrotron asymptotic limit (SAL) using the measured electron beam parameters.

Leurent, V; Michel, P; Clayton, C E; Pollock, B; Doeppner, T; Wang, T L; Ralph, J; Pak, A; Marsh, K; Joshi, C; Tynan, G R; Divol, L; Palastro, J P; Glenzer, S H; Froula, D H

2008-08-12T23:59:59.000Z

178

New portable hand-held radiation instruments for measurements and monitoring  

SciTech Connect (OSTI)

Hand-held radiation monitors are often used to search pedestrians and motor vehicles for special nuclear material (SNM) as part of a physical protection plan for nuclear materials. Recently, the Los Alamos Advanced Nuclear Technology group has commercialized an improved hand-held monitor that can be used for both physical-protection monitoring and verification measurements in nuclear material control and waste management. The new monitoring instruments are smaller and lighter; operate much longer on a battery charge; are available with NaI(Tl) or neutron and gamma-ray sensitive plastic scintillation detectors; and are less expensive than other comparable instruments. They also have a second operating mode for making precise measurements over counting times as long as 99 s. This mode permits making basic verification measurements that may be needed before transporting nuclear material or waste outside protected areas. Improved verification measurements can be made with a second new hand-held instrument that has a stabilized detector and three separate gamma-ray energy windows to obtain spectral information for SNM quantity, enrichment, or material-type verification.

Fehlau, P.E.

1987-01-01T23:59:59.000Z

179

ARMlUnmanned Air VehiclelSatelites The Atmospheric Radiation Measurement  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ARMlUnmanned Air VehiclelSatelites ARMlUnmanned Air VehiclelSatelites The Atmospheric Radiation Measurement Unmanned Aerospace Vehicle Program: An Overview P. A. Crowley Environmental Sciences Division U.S. Department of Energy Washington, D.C. J. Vitko, Jr. Sandia National Laboratories Livermore, CA 94550 Introduction for leased UA V operation over the next year. Examples include, but are not limited to, the existing Gnat 750-45, with its 7-8 km ceiling, as well as the planned FY93 demonstration of two 20 km capable UA Vs-the Perseus- B and the Raptor. Thus the funding of some initial flights and the availability of leased UAVs will enable us to start up the ARM-UAV program. Additional funding will be required to continue this program. Interim Science Team This paper and the one that follows describe the start-up

180

Indoor and Outdoor in Situ High-Resolution Gamma Radiation Measurements in Urban Areas of Cyprus  

E-Print Network [OSTI]

In situ, high-resolution, gamma-ray spectrometry of a total number of 70 outdoor and 20 indoor representative measurements were performed in preselected, common locations of the main urban areas of Cyprus. Specific activities and gamma absorbed dose rates in air due to the naturally occurring radionuclides of Th-232 and U-238 series, and K-40 are determined and discussed. Effective dose rate to the Cyprus population due to terrestrial gamma radiation is derived directly from this work. The results obtained outdoors match very well with those derived previously by high-resolution gamma spectrometry of soil samples, which were collected from the main island bedrock surface. This implies that the construction and building materials in urban areas do not affect the external gamma dose rate; thus they are mostly of local origin. Finally, the indoor/outdoor gamma dose ratio was found to be 1.4 +- 0.5.

E. Svoukis; H. Tsertos

2006-10-02T23:59:59.000Z

Note: This page contains sample records for the topic "radiation measurement quality" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Service quality in nursing homes. A construct, measurement and performance model to increase client focus.  

E-Print Network [OSTI]

??This thesis is concerned with the quality of care for the elderly in nursing homes, responding to a critical social and demographic imperative. The aim… (more)

Lapré, Frederik Albert Ludwig

2012-01-01T23:59:59.000Z

182

Efficacy of an integrated continuing medical education (CME) and quality improvement (QI) program on radiation oncologist (RO) clinical practice  

SciTech Connect (OSTI)

Purpose: There has been little radiation oncologist (RO)-specific research in continuing medical education (CME) or quality improvement (QI) program efficacy. Our aim was to evaluate a CME/QI program for changes in RO behavior, performance, and adherence to department protocols/studies over the first 12 months of the program. Methods and Materials: The CME/QI program combined chart audit with feedback (C-AWF), simulation review AWF (SR-AWF), reminder checklists, and targeted CME tutorials. Between April 2003 and March 2004, management of 75 patients was evaluated by chart audit with feedback (C-AWF) and 178 patients via simulation review audit (SR-AWF) using a validated instrument. Scores were presented, and case management was discussed with individualized educational feedback. RO behavior and performance was compared over the first year of the program. Results: Comparing the first and second 6 months, there was a significant improvement in mean behavior (12.7-13.6 of 14, p = 0.0005) and RO performance (7.6-7.9 of 8, p = 0.018) scores. Protocol/study adherence significantly improved from 90.3% to 96.6% (p = 0.005). A total of 50 actions were generated, including the identification of learning needs to direct CME tutorials, the systematic change of suboptimal RO practice, and the alteration of deficient management of 3% of patients audited during the program. Conclusion: An integrated CME/QI program combining C-AWF, SR-AWF, QI reminders, and targeted CME tutorials effectively improved targeted RO behavior and performance over a 12-month period. There was a corresponding increase in departmental protocol and study adherence.

Leong, Cheng Nang [Department of Radiation Oncology, Cancer Institute, National University Hospital (Singapore) and Department of Radiation Oncology, Cancer Institute, Tan Tock Seng Hospital (Singapore)]. E-mail: Cheng_Nang_Leong@mail.nhg.com.sg; Shakespeare, Thomas Philip [Department of Radiation Oncology, Cancer Institute, National University Hospital (Singapore); North Coast Cancer Institute, Coffs Harbour (Australia); Mukherjee, Rahul K. [Department of Radiation Oncology, Cancer Institute, National University Hospital (Singapore); Department of Radiation Oncology, Cancer Institute, Tan Tock Seng Hospital (Singapore); Back, Michael F. [Department of Radiation Oncology, Cancer Institute, National University Hospital (Singapore); Department of Radiation Oncology, Cancer Institute, Tan Tock Seng Hospital (Singapore); Lee, Khai Mun [Department of Radiation Oncology, Cancer Institute, National University Hospital (Singapore); Department of Radiation Oncology, Cancer Institute, Tan Tock Seng Hospital (Singapore); Lu, Jiade Jay [Department of Radiation Oncology, Cancer Institute, National University Hospital (Singapore); Department of Radiation Oncology, Cancer Institute, Tan Tock Seng Hospital (Singapore); Wynne, Christopher J. [Department of Radiation Oncology, Cancer Institute, National University Hospital (Singapore); Lim, Keith [Department of Radiation Oncology, The Cancer Institute, National University Hospital (Singapore); Tang, Johann [Department of Radiation Oncology, Cancer Institute, National University Hospital (Singapore); Department of Radiation Oncology, Cancer Institute, Tan Tock Seng Hospital (Singapore); Zhang Xiaojian [Department of Radiation Oncology, Cancer Hospital, Fudan Hospital, Shanghai (China)

2006-12-01T23:59:59.000Z

183

Customer satisfaction for beef: home-use tests and objective measures to evaluate three retail cuts at different quality levels  

E-Print Network [OSTI]

, participated in a six-week home-use test of the three cuts and four quality grade levels completing a questionnaire for each steak evaluated. Trained sensory panel and Wamer-Bratzler shear force determination (WBS) provided objective measures for each subprimal...

Neely, Tracey Renee

2012-06-07T23:59:59.000Z

184

Comparison of Historical Satellite-Based Estimates of Solar Radiation Resources with Recent Rotating Shadowband Radiometer Measurements: Preprint  

SciTech Connect (OSTI)

The availability of rotating shadow band radiometer measurement data at several new stations provides an opportunity to compare historical satellite-based estimates of solar resources with measurements. We compare mean monthly daily total (MMDT) solar radiation data from eight years of NSRDB and 22 years of NASA hourly global horizontal and direct beam solar estimates with measured data from three stations, collected after the end of the available resource estimates.

Myers, D. R.

2009-03-01T23:59:59.000Z

185

A new approach for simultaneously retrieving cloud albedo and cloud fraction from surface-based shortwave radiation measurements  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ENVIRONMENTAL ENVIRONMENTAL RESEARCH LETTERS Environ. Res. Lett. 8 (2013) 044023 (9pp) doi:10.1088/1748-9326/8/4/044023 A new approach for simultaneously retrieving cloud albedo and cloud fraction from surface-based shortwave radiation measurements Yu Xie and Yangang Liu Environmental Sciences Department, Brookhaven National Laboratory, Upton, NY 11973, USA E-mail: yxie@bnl.gov Received 27 June 2013 Accepted for publication 8 October 2013 Published 30 October 2013 Online at stacks.iop.org/ERL/8/044023 Abstract Surface-based measurements of shortwave (SW) radiative fluxes contain valuable information on cloud properties, but have not been fully used to infer those properties. Here a new analytical approach is presented that simultaneously infers cloud albedo and cloud fraction from surface-based measurements of total and direct radiative fluxes. An inspection of the

186

Measuring perceived air quality and intensity by a Sensor System, the European Project SysPAQ  

E-Print Network [OSTI]

as it is perceived by humans to be used as a control device for indoor air quality. KEYWORDS Perceived air quality;because of the unmatched sensitivity to many odorous indoor air pollutants. One of the reasons indoor air pollutants that trigger human sensory response. The SysPAQ project builds upon current

Paris-Sud XI, Université de

187

Measuring the quality of family-professional partnerships in special education services  

E-Print Network [OSTI]

One difficulty in monitoring the quality of family-professional partnerships has been the lack of a psychometrically acceptable and sufficiently general instrument with which to assess them. The current work describes ...

Summers, Jean Ann; Hoffman, Lesa; Marquis, Janet; Turnbull, Ann P.; Poston, Denise J.; Nelson, Louise Lord

2005-01-01T23:59:59.000Z

188

Standard Test Method for Measuring Dose for Use in Linear Accelerator Pulsed Radiation Effects Tests  

E-Print Network [OSTI]

1.1 This test method covers a calorimetric measurement of the total dose delivered in a single pulse of electrons from an electron linear accelerator or a flash X-ray machine (FXR, e-beam mode) used as an ionizing source in radiation-effects testing. The test method is designed for use with pulses of electrons in the energy range from 10 to 50 MeV and is only valid for cases in which both the calorimeter and the test specimen to be irradiated are“thin” compared to the range of these electrons in the materials of which they are constructed. 1.2 The procedure described can be used in those cases in which (1) the dose delivered in a single pulse is 5 Gy (matl) (500 rd (matl)) or greater, or (2) multiple pulses of a lower dose can be delivered in a short time compared to the thermal time constant of the calorimeter. Matl refers to the material of the calorimeter. The minimum dose per pulse that can be acceptably monitored depends on the variables of the particular test, including pulse rate, pulse uniformity...

American Society for Testing and Materials. Philadelphia

2011-01-01T23:59:59.000Z

189

Determination of neutral beam energy fractions from collisional radiative measurements on DIII-D  

SciTech Connect (OSTI)

Neutral beams based on positive ion source technology are a key component of contemporary fusion research. An accurate assessment of the injected beam species mix is important for determining the actual plasma heating and momentum input as well as proper interpretation of beam-based diagnostics. On DIII-D, the main ion charge-exchange spectroscopy system is used to extract well-resolved intensity ratios of the Doppler-shifted D{sub {alpha}} emission from the full, half, and third energy beam components for a variety of beam operational parameters. In conjunction with accurate collisional-radiative modeling, these measurements indicate the assumed species mix and power fractions can vary significantly and should be regularly monitored and updated for the most accurate interpretation of plasma performance. In addition, if stable active control of the power fractions can be achieved through appropriate source tuning, the resulting control over the deposition profile can serve as an additional experimental knob for advanced tokamak studies, e.g., varying the off axis beam current drive without altering the beam trajectory.

Thomas, D. M.; Van Zeeland, M. A. [General Atomics, P.O. Box 85608, San Diego, California 92186-5608 (United States); Grierson, B. A. [Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States); Munoz Burgos, J. M. [Oak Ridge Institute for Science Education, Oak Ridge, Tennessee 37831-0117 (United States)

2012-10-15T23:59:59.000Z

190

High-resolution tangential absolute extreme ultraviolet arrays for radiated power density measurements on NSTX-U  

SciTech Connect (OSTI)

The radiated-power-density diagnostic on the equatorial midplane for the NSTX-U tokamak will be upgraded to measure the radial structure of the photon emissivity profile with an improved radial resolution. This diagnostic will enhance the characterization and studies of power balance, impurity transport, and MHD. The layout and response expected of the new system is shown for different plasma conditions and impurity concentrations. The effect of toroidal rotation driving poloidal asymmetries in the core radiation from high-Z impurities is also addressed.

Delgado-Aparicio, L.; Bell, R. E.; Diallo, A.; Gerhardt, S. P.; Kozub, T. A.; LeBlanc, B. P.; Stratton, B. C. [Princeton Plasma Physics Laboratory, Princeton, New Jersey 08540 (United States); Faust, I. [MIT Plasma Science and Fusion Center, Cambridge, Massachusetts 02139 (United States); Tritz, K. [The Johns Hopkins University, Baltimore, Maryland 21209 (United States)

2014-11-15T23:59:59.000Z

191

Use of the Tetrazolium Assay in Measuring the Response of Human Tumor Cells to Ionizing Radiation  

Science Journals Connector (OSTI)

...irradiation dose rate was...demonstrated a range of absorbance...RESPONSE TO IONIZING RADIATION with 1 mg...with graded doses of irradiation...each with a range of seeded...MGHU1 0 5 10 DOSE (Gy) RT112...RESPONSE TO IONIZING RADIATION 150000 FF...

Patricia Price and Trevor J. McMillan

1990-03-01T23:59:59.000Z

192

Direct vs. projective: measures of children's perceptions of the parent-child relationship as predictors of future relationship quality  

E-Print Network [OSTI]

and are a potential mechanism for the observed relation between childhood aggression and the parent-child relationship (Lyons-Ruth, Alpern, dk Repacholi, 1993; Renken, Egeland, Marvinney, Mangelsdorf, & Sroufe, 1989). A subgroup of 71% of a sample... was the quality of a newly formed relationship between the child and a mentor and included measures as reported by the mentor and by the child. The mentor-report measures were the Therapeutic Alliance Scales for Children (TAS-M, Shirk & Saiz, 1992) and mentor...

Collie, Claire Futamase

2012-06-07T23:59:59.000Z

193

INVESTIGATING THE RELIABILITY OF CORONAL EMISSION MEASURE DISTRIBUTION DIAGNOSTICS USING THREE-DIMENSIONAL RADIATIVE MAGNETOHYDRODYNAMIC SIMULATIONS  

SciTech Connect (OSTI)

Determining the temperature distribution of coronal plasmas can provide stringent constraints on coronal heating. Current observations with the Extreme ultraviolet Imaging Spectrograph (EIS) on board Hinode and the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory provide diagnostics of the emission measure distribution (EMD) of the coronal plasma. Here we test the reliability of temperature diagnostics using three-dimensional radiative MHD simulations. We produce synthetic observables from the models and apply the Monte Carlo Markov chain EMD diagnostic. By comparing the derived EMDs with the 'true' distributions from the model, we assess the limitations of the diagnostics as a function of the plasma parameters and the signal-to-noise ratio of the data. We find that EMDs derived from EIS synthetic data reproduce some general characteristics of the true distributions, but usually show differences from the true EMDs that are much larger than the estimated uncertainties suggest, especially when structures with significantly different density overlap along the line of sight. When using AIA synthetic data the derived EMDs reproduce the true EMDs much less accurately, especially for broad EMDs. The differences between the two instruments are due to the: (1) smaller number of constraints provided by AIA data and (2) broad temperature response function of the AIA channels which provide looser constraints to the temperature distribution. Our results suggest that EMDs derived from current observatories may often show significant discrepancies from the true EMDs, rendering their interpretation fraught with uncertainty. These inherent limitations to the method should be carefully considered when using these distributions to constrain coronal heating.

Testa, Paola [Smithsonian Astrophysical Observatory, 60 Garden Street, MS 58, Cambridge, MA 02138 (United States); De Pontieu, Bart; Martinez-Sykora, Juan [Lockheed Martin Solar and Astrophysics Laboratory, Org. A021S, Building 252, 3251 Hanover Street, Palo Alto, CA 94304 (United States); Hansteen, Viggo; Carlsson, Mats, E-mail: ptesta@cfa.harvard.edu [Institute of Theoretical Astrophysics, University of Oslo, P.O. Box 1029, Blindern, NO-0315 Oslo (Norway)

2012-10-10T23:59:59.000Z

194

Cross-calibration of the Transition Radiation Detector of AMS-02 for an Energy Measurement of Cosmic-Ray Ions  

E-Print Network [OSTI]

Since May 2011 the AMS-02 experiment is installed on the International Space Station and is observing cosmic radiation. It consists of several state-of-the-art sub-detectors, which redundantly measure charge and energy of traversing particles. Due to the long exposure time of AMS-02 of many years the measurement of momentum for protons and ions is limited systematically by the spatial resolution and magnetic field strength of the silicon tracker. The maximum detectable rigidity for protons is about 1.8~TV, for helium about 3.6~TV. We investigate the possibility to extend the range of the energy measurement for heavy nuclei ($Z\\geq2$) with the transition radiation detector (TRD). The response function of the TRD shows a steep increase in signal from the level of ionization at a Lorentz factor $\\gamma$ of about 500 to $\\gamma\\approx20000$, where the transition radiation signal saturates. For heavy ions the signal fluctuations in the TRD are sufficiently small to allow an energy measurement with the TRD beyond t...

Obermeier, Andreas

2014-01-01T23:59:59.000Z

195

Solar Radiation, its Measurement and Application in Solar Energy Utilization Programme  

Science Journals Connector (OSTI)

The electromagnetic radiation emitted by the sun, covers a very large range of wavelengths, from radiowaves through the visible to X-rays and gamma rays. But 99 percent of this energy is contained in the region 0...

A. Mani

1987-01-01T23:59:59.000Z

196

Measuring short electron bunch lengths using coherent smith-purcell radiation  

DOE Patents [OSTI]

A method is provided for directly determining the length of sub-picosecond electron bunches. A metallic grating is formed with a groove spacing greater than a length expected for the electron bunches. The electron bunches are passed over the metallic grating to generate coherent and incoherent Smith-Purcell radiation. The angular distribution of the coherent Smith-Purcell radiation is then mapped to directly deduce the length of the electron bunches.

Nguyen, Dinh C. (Los Alamos, NM)

1999-01-01T23:59:59.000Z

197

Plutonium metal standards exchange program for actinide measurement quality assurance (2001–2007)  

Science Journals Connector (OSTI)

Plutonium metal exchange programs operated by the Rocky Flats Plant were conducted from 1956–1989 to ... of methods and results for plutonium, uranium, neptunium, and americium, measurements.

Lav Tandon; Kevin Kuhn; Diana Decker…

2009-11-01T23:59:59.000Z

198

Radiation physics, biophysics, and radiation biology  

SciTech Connect (OSTI)

Research at the Center for Radiological Research is a multidisciplenary blend of physics, chemistry and biology aimed at understanding the mechanisms involved in the health problems resulting from human exposure to ionizing radiations. The focus is increased on biochemistry and the application of the techniques of molecular biology to the problems of radiation biology. Research highlights of the program from the past year are described. A mathematical model describing the production of single-strand and double-strand breaks in DNA as a function radiation quality has been completed. For the first time Monte Carlo techniques have been used to obtain directly the spatial distribution of DNA moieties altered by radiation. This information was obtained by including the transport codes a realistic description of the electronic structure of DNA. We have investigated structure activity relationships for the potential oncogenicity of a new generation of bioreductive drugs that function as hypoxic cytotoxins. Experimental and theoretical investigation of the inverse dose rate effect, whereby medium LET radiations actually produce an c effect when the dose is protracted, is now at a point where the basic mechanisms are reasonably understood and the complex interplay between dose, dose rate and radiation quality which is necessary for the effect to be present can now be predicted at least in vitro. In terms of early radiobiological damage, a quantitative link has been established between basic energy deposition and locally multiply damaged sites, the radiochemical precursor of DNA double strand breaks; specifically, the spatial and energy deposition requirements necessary to form LMDs have been evaluated. For the first time, a mechanically understood biological fingerprint'' of high-LET radiation has been established. Specifically measurement of the ratio of inter-to intra-chromosomal aberrations produces a unique signature from alpha-particles or neutrons.

Hall, E.J.; Zaider, M.

1993-05-01T23:59:59.000Z

199

Appendix A: Continuous Quality Improvement Matrix Student Learning Outcomes Relevant Experiences Measures Use of Results  

E-Print Network [OSTI]

in considering equity vs. efficiency tradeoffs within real world situations. Average = 4.64/6 Individual faculty on this measure. It is possible that new elective courses may be neccesary at some point in the future to improve performance on this goal. #12;Student Learning Outcomes Relevant Experiences Measures Use of Results equity vs

Gering, Jon C.

200

Quality management system and accreditation of the in vivo monitoring laboratory at Karslruhe Institue of Technology  

Science Journals Connector (OSTI)

......Laboratory, Institute for Radiation Research, Karlsruhe Institute...Development Quality Control Radiation Monitoring methods standards Radiation Protection methods standards...Radiometry methods standards Safety Software Total Quality Management......

B. Breustedt; U. Mohr; N. Biegard; G. Cordes

2011-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiation measurement quality" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

A 25-month database of stratus cloud properties generated from ground-based measurements at the Atmospheric Radiation Measurement Southern Great Plains Site  

SciTech Connect (OSTI)

A 25-month database of the macrophysical, microphysical, and radiative properties of isolated and overcast low-level stratus clouds has been generated using a newly developed parameterization and surface measurements from the Atmospheric Radiation Measurement central facility in Oklahoma. The database (5-min resolution) includes two parts: measurements and retrievals. The former consist of cloud base and top heights, layer-mean temperature, cloud liquid water path, and solar transmission ratio measured by a ground-based lidar/ceilometer and radar pair, radiosondes, a microwave radiometer, and a standard Eppley precision spectral pyranometer, respectively. The retrievals include the cloud-droplet effective radius and number concentration and broadband shortwave optical depth and cloud and top-of-atmosphere albedos. Stratus without any overlying mid or high-level clouds occurred most frequently during winter and least often during summer. Mean cloud-layer altitudes and geometric thicknesses were higher and greater, respectively, in summer than in winter. Both quantities are positively correlated with the cloud-layer mean temperature. Mean cloud-droplet effective radii range from 8.1 {mu}m in winter to 9.7 {mu}m during summer, while cloud-droplet number concentrations during winter are nearly twice those in summer. Since cloud liquid water paths are almost the same in both seasons, cloud optical depth is higher during the winter, leading to greater cloud albedos and lower cloud transmittances. (c) 2000 American Geophysical Union.

Dong, Xiquan [Meteorology Department, University of Utah, Salt Lake City (United States)] [Meteorology Department, University of Utah, Salt Lake City (United States); Minnis, Patrick [NASA Langley Research Center, Hampton, Virginia (United States)] [NASA Langley Research Center, Hampton, Virginia (United States); Ackerman, Thomas P. [Pacific Northwest National Laboratory, DOE, Richland, Washington (United States)] [Pacific Northwest National Laboratory, DOE, Richland, Washington (United States); Clothiaux, Eugene E. [Department of Meteorology, Pennsylvania State University, University Park (United States)] [Department of Meteorology, Pennsylvania State University, University Park (United States); Mace, Gerald G. [Meteorology Department, University of Utah, Salt Lake City (United States)] [Meteorology Department, University of Utah, Salt Lake City (United States); Long, Charles N. [Department of Meteorology, Pennsylvania State University, University Park (United States)] [Department of Meteorology, Pennsylvania State University, University Park (United States); Liljegren, James C. [Ames Laboratory, DOE, Ames, Iowa (United States)] [Ames Laboratory, DOE, Ames, Iowa (United States)

2000-02-27T23:59:59.000Z

202

Radiation exposure during liver surgery after treatment with 90Y microspheres, evaluated with computer simulations and dosimeter measurements  

Science Journals Connector (OSTI)

Purpose. Two patients with liver tumours were planned for a combined treatment, including surgery with preceding injections of ?? radiation emitting 90Y microspheres (SIRTEX®). The aim of this paper is to present a method of pre-surgical computer simulations of the absorbed dose rate on the surface of tumour tissue, combined with measurements of the actual absorbed dose rate on resected tissue, in order to estimate the absorbed dose to a surgeon's fingers during such surgery procedures. Methods and Materials. The dose rates from ?? radiation on the surface of tumour tissue were simulated with the software VARSKIN® Mod 2. The activity concentrations in tumours were estimated, based on SPECT/CT distribution studies of 99mTc-MAA and confirmed by SPECT/CT bremsstrahlung studies of 90Y microspheres. The activity distributions were considered as homogeneous within the tumour regions. The absorbed dose rates at different tumour tissue spots were calculated based on measurements with thermo-luminescent dosimeters (TLD) fastened on resected tissue. Results. The simulations showed a good agreement with the averaged absorbed dose rates based on TLD measurements performed on resected tissue, differing by 13% and 4% respectively. The absorbed dose rates at the measured maximum hotspots were twice as high as the average dose rates for both patients. Conclusion. The data is not sufficient in order to draw any general conclusions about dose rates on tumour tissue during similar surgeries, neither about the influence of dose rate heterogeneities nor about average dose rates. However, the agreement between simulations and measurements on these limited data indicate that this approach is a promising method for estimations of the radiation exposure to the surgeons' fingers during this kind of surgery procedure. More data from similar surgeries are necessary in order to validate the method.

Jonas Högberg; Magnus Rizell; Ragnar Hultborn; Johanna Svensson; Olof Henrikson; Peter Gjertsson; Peter Bernhardt

2012-01-01T23:59:59.000Z

203

Can We Predict Plan Quality for External Beam Partial Breast Irradiation: Results of a Multicenter Feasibility Study (Trans Tasman Radiation Oncology Group Study 06.02)  

SciTech Connect (OSTI)

Purpose: Partial breast irradiation (PBI) after lumpectomy may be an option for selected patients with early breast cancer. A feasibility study of accelerated PBI delivered using external beam 3-dimensional conformal radiation therapy (RT) was undertaken at 8 Australasian centers. The present study evaluated the impact of patient, tumor, and RT technique-related factors on the quality of RT plans as determined by the dose–volume parameters of organs at risk. Methods and Materials: Forty-eight patients were enrolled in the study. All RT plans were centrally reviewed using predefined dosimetric criteria before commencement and after completion of protocol therapy. The RT plans of 47 patients met the dose–volume constraints, and all 47 patients received PBI to a prescribed dose of 38.5 Gy in 10 fractions. The RT plan quality was determined by volumes of the ipsilateral whole breast, lung, and heart that received 50% and 95%; 30%; and 5% of the prescribed dose, respectively. Patient, tumor, and RT technique-related factors were investigated for association with the parameters of RT plan quality. Results: The ratio of the planning target volume to the ipsilateral whole-breast volume was significantly associated with the ipsilateral breast doses on multiple variable analyses. The distance of the postlumpectomy surgical cavity from the heart and lung were predictive for heart and lung doses, respectively. A distance between surgical cavity and heart of >4 cm typically resulted in <1% of the heart volume receiving 5 Gy or less. It was more difficult to meet the heart dose constraint for left-sided and medially located tumors. Conclusions: Partial breast irradiation using 3-dimensional conformal RT was feasible within the study constraints. The ratio of planning target volume to ipsilateral whole-breast volume and the distance of surgical cavity from the heart were significant predictors of the quality of treatment plan for external beam PBI.

Kron, Tomas, E-mail: Tomas.Kron@petermac.org [Peter MacCallum Cancer Centre, Departments of Radiation Oncology, Physical Sciences and Radiation Therapy, Melbourne, Victoria (Australia); Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Victoria (Australia); School of Science, Engineering and Technology, Royal Melbourne Institute of Technology University, Melbourne, Victoria (Australia); Willis, David; Link, Emma [Peter MacCallum Cancer Centre, Departments of Radiation Oncology, Physical Sciences and Radiation Therapy, Melbourne, Victoria (Australia); Lehman, Margot [Princess Alexandra Hospital, Department of Radiation Oncology, Brisbane, Queensland (Australia); Campbell, Gillian [Auckland City Hospital, Department of Radiation Oncology, Auckland (New Zealand); O'Brien, Peter [Newcastle Calvary Mater Hospital, Department of Radiation Oncology, Newcastle, NSW (Australia); Chua, Boon [Peter MacCallum Cancer Centre, Departments of Radiation Oncology, Physical Sciences and Radiation Therapy, Melbourne, Victoria (Australia); Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Victoria (Australia)

2013-11-15T23:59:59.000Z

204

Net radiative effect of dust aerosols from satellite measurements over Sahara  

E-Print Network [OSTI]

's Radiant Energy System (CERES) to calculate the top-of-atmosphere SW and LW flux radiative effect due to oceans where the shortwave effect dominates. Citation: Yang, E.-S., P. Gupta, and S. A. Christopher (2009 of aerosols, space-borne sensors use information from the ultraviolet (UV) to the visible and thermal infrared

Christopher, Sundar A.

205

Absorption of solar radiation by the cloudy atmosphere: Further interpretations of collocated aircraft measurements  

E-Print Network [OSTI]

Absorption of solar radiation by the cloudy atmosphere: Further interpretations of collocated%) of this enhanced cloud absorption occurs at wavelengths 680 nm, and that the observed cloud absorption does stated, the purpose of ARESE was to address the issue of cloud shortwave (SW) absorption. Do clouds

Zender, Charles

206

Glass transition in thaumatin crystals revealed through temperature-dependent radiation-sensitivity measurements  

Science Journals Connector (OSTI)

Radiation damage to protein crystals exhibits two regimes of temperature-activated behavior between T = 300 and 100 K, with a crossover at the protein glass transition near 200 K. These results have implications for mechanistic studies of proteins and for structure determination when cooling to T = 100 K creates excessive disorder.

Warkentin, M.

2010-09-18T23:59:59.000Z

207

Terahertz Sensor for Non-Contact Thickness and Quality Measurement of Automobile Paints of Varying Complexity  

E-Print Network [OSTI]

to resolve coating layers down to a thickness of 18 $mu{hbox{m}}$ and was validated for both single- and multi-layer automobile paint samples. Results of the terahertz measurements were benchmarked against other techniques that are currently used for non...

Su, Ke; Shen, Yao-Chun; Zeitler, J. Axel

2014-06-06T23:59:59.000Z

208

Radiation Measurements 41 (2006) 101107 www.elsevier.com/locate/radmeas  

E-Print Network [OSTI]

dosimetry 1. Introduction Methods for long-term passive radon measurements based on nuclear track detectors- tive dosimetry based on measurements of 210Po activity in objects was proposed. Atoms of short

Yu, K.N.

209

How is the Data Quality Office Doing?  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

How is the Data Quality Office Doing? How is the Data Quality Office Doing? K. L. Sonntag, R. A. Peppler, A. R. Dean, and C. M. Shafer Cooperative Institute for Mesoscale Meteorological Studies University of Oklahoma Norman, Oklahoma Introduction The Atmospheric Radiation Measurement (ARM) Program has collected data from its Southern Great Plains (SGP) climate research facility since late 1992, from its Tropical Western Pacific (TWP) site since 1996, and from its North Slope of Alaska (NSA) site since 1997. There are numerous instrument platforms at each site, including radiometer suites that measure solar and terrestrial radiation; tower- mounted instruments that measure wind, temperature, and humidity; subterranean sensors that measure soil moisture and thermal properties; a host of cloud-observing instruments that measure cloud extent

210

Estimation of the contribution of photon radiation for measurement of the exposure dose rate of neutron sources based on 252Cf  

Science Journals Connector (OSTI)

A method for the estimation of the contribution of photon radiation to the detector readings for measurement of the exposure dose rate and the equivalent activity of neutron ... screens and filters is considered....

N. F. Demchenko; R. N. Minvaliev; V. I. Shipilov…

2012-06-01T23:59:59.000Z

211

Time-specific measurements of energy deposition from radiation fields in simulated sub-micron tissue volumes  

SciTech Connect (OSTI)

A tissue-equivalent spherical proportional counter is used with a modified amplifier system to measure specific energy deposited from a uniform radiation field for short periods of time ({approximately}1 {micro}s to seconds) in order to extrapolate to dose in sub-micron tissue volumes. The energy deposited during these time intervals is compared to biological repair processes occurring within the same intervals after the initial energy deposition. The signal is integrated over a variable collection time which is adjusted with a square-wave pulse. Charge from particle passages is collected on the anode during the period in which the integrator is triggered, and the signal decays quickly to zero after the integrator feedback switch resets; the process repeats for every triggering pulse. Measurements of energy deposited from x rays, {sup 137}Cs gamma rays, and electrons from a {sup 90}Sr/{sup 90}Y source for various time intervals are taken. Spectral characteristics as a function of charge collection time are observed and frequency plots of specific energy and collection time-interval are presented. In addition, a threshold energy flux is selected for each radiation type at which the formation of radicals (based on current measurements) in mammalian cells equals the rate at which radicals are repaired.

Famiano, M.A.

1997-07-07T23:59:59.000Z

212

Steam quality determination using pressure and temperature measurements in a venturi  

E-Print Network [OSTI]

1987 Steam (tuality Ue~tion using Pressure and ~tuze Measurements M A Venturi(December 1987) Benny leo O' Neil, B. S ~ Texas A & M University Chairman of Advisory Crmsittee: Dr. R. A. Staztnaan Steam injecticn into heavy oil reservoirs accounted...-Rmse Flow 'Ihrough Venturi. . . TABID 2: Pressures and ~tures Gorrespanding to location on Heat E&n9anger. 25 59 LI87 OF FIGURES FIGURE 1: Steam distribution network facilities. . FIGURE 2: Counter flow heat exchanger FIGURE 3: Gas fired stan...

O'Neil, Danny Leo

2012-06-07T23:59:59.000Z

213

The influence of laser clipped by the laser entrance hole on hohlraum radiation measurement on Shenguang-III prototype  

SciTech Connect (OSTI)

Measuring the x-ray flux exiting the target's laser entrance hole (LEH) is the most common diagnostic that quantifies the x-ray intensity inside the laser-driven hohlraum. However, this signal accounts for only a small portion of the incident laser power and thus is likely to be affected by unwanted x-ray background from non-target area, leading to an overestimation of the hohlraum drive. Unwanted emission might be produced when the laser light is clipped by the LEH (LEH clipping) because of a lack of clearance for laser spot, or with a laser spot comprising of discrete structure, or even with a poor pointing accuracy. Its influence on the hohlraum radiation diagnostic is investigated on Shenguang-III prototype laser facility with the typical 1 ns square pulse. The experiment employed three types of targets to excite the unwanted x-ray background from LEH clipping, unconverted light, and both effects, respectively. This work gives an absolute evaluation of x-ray produced by the LEH clipping, which is measured by flat-response x-ray detectors (FXRD) at multiple view angles. The result indicates that there is little variation in measured emission to various view angles, because the unwanted x-rays are mainly generated at the side face of the LEH lip when laser is obliquely incident. Therefore, the LEH clipping brings more overestimation in hohlraum radiation measurement at larger view angle since the hohlraum LEH as an emitting source viewed by FXRD is decreased as the view angle increases. In our condition, the LEH clipping contributes 2%–3.5% overestimation to the hohlraum flux measurement.

Yang, Dong [Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900 (China) [Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900 (China); CAS Key Laboratory of Basic Plasma Physics and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026 (China); Li, Zhichao; Guo, Liang; Li, Sanwei; Yi, Rongqing; Song, Tianming; Zhang, Huan; Wang, Zhebin; Jiang, Xiaohua; Jiang, Shaoen; Ding, Yongkun [Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900 (China)] [Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900 (China)

2014-03-15T23:59:59.000Z

214

Measurement of natural radioactivity and dose rate assessment of terrestrial gamma radiation in the soil of southern Punjab, Pakistan  

Science Journals Connector (OSTI)

......terrestrial background radiation mainly due to these...assess the population radiation doses(4-9). However...data are available on naturally occuring and artificial radionulides...order to assess the radiation doses for the general......

I. Fatima; J. H. Zaidi; M. Arif; M. Daud; S. A. Ahmad; S. N. A. Tahir

2008-01-01T23:59:59.000Z

215

Final Technical Report for Chief Scientist for Atmospheric Radiation Measurement (ARM) Aerial Vehicle Program (AVP)  

SciTech Connect (OSTI)

The major responsibilities of the PI were identified as 1) the formulation of campaign plans, 2) the representation of AVP in various scientific communities inside and outside of ARM and the associated working groups, 3) the coordination and selection of the relative importance of the three different focus areas (routine observations, IOPs, instrument development program), 4) the examination and quality control of the data collected by AVP, and 5) providing field support for flight series. This report documents the accomplishments in each of these focus areas for the 3 years of funding for the grant that were provided.

Greg M. McFarquhar

2011-10-21T23:59:59.000Z

216

Atmospheric Radiation Measurment (ARM) Data from the Ganges Valley, India for the Ganges Valley Aerosol Experiment (GVAX)  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

In 2011 and 2012, the Ganges Valley Aerosol Experiment (GVAX) began in the Ganges Valley region of India. The objective was to obtain measurements of clouds, precipitation, and complex aerosols to study their impact on cloud formation and monsoon activity in the region. During the Indian Ocean Experiment (INDOEX) field studies, aerosols from the Ganges Valley region were shown to affect cloud formation and monsoon activity over the Indian Ocean. The complex field study used the ARM Mobile Facility (AMF) to measure radiative, cloud, convection, and aerosol characteristics over the mainland. The resulting data set captured pre-monsoon to post-monsoon conditions to establish a comprehensive baseline for advancements in the study of the effects of atmospheric conditions of the Ganges Valley.

217

Design of a New Recoil Separator for Measurements of Radiative Capture Reactions in Astrophysics  

SciTech Connect (OSTI)

The rates of proton- and alpha-capture reactions on unstable proton-rich nuclei are needed to understand the energy generation and element synthesis occurring in novae, X-ray bursts, and other explosions. Direct measurements of the cross sections of some of these reactions are now possible with radioactive beams and a recoil separator. A new device for such measurements, the Separator for CApture Reactions [SECAR], is being designed for use at the Facility for Rare Isotope Beams (FRIB). The specifications and preliminary conceptual design will be discussed along with plans for the first set of measurements.

Berg, Georg P. A.; Couder, Manoel; Wiescher, Michael [Dept. of Physics, Univ. of Notre Dame, Notre Dame, Indiana, 46556-5670 (United States); Joint Institute for Nuclear Astrophysics (JINA) (United States); Blackmon, Jeff C. [Dept. of Physics and Astronomy, Louisiana State Univ., Baton Rouge, Louisiana, 70803-4001 (United States); Greife, U. [Dept. of Physics, Colorado School of Mines, Golden, CO 80401 (United States); Montes, F.; Schatz, Hendrik [National Superconducting Cyclotron Laboratory, Michigan State Univ., East Lansing, Michigan, 48824 (United States); Joint Institute for Nuclear Astrophysics (JINA) (United States); Rehm, K. Ernst [Physics Division, Argonne National Lab, Argonne, Illinois, 60439 (United States); Joint Institute for Nuclear Astrophysics (JINA) (United States); Smith, Michael S. [Physics Division, Oak Ridge National Lab, Oak Ridge, Tennessee, 37831-6354 (United States); Zeller, Al [National Superconducting Cyclotron Laboratory, Michigan State Univ., East Lansing, Michigan, 48824 (United States)

2010-08-12T23:59:59.000Z

218

Radiative transfer effects on Doppler measurements as sources of surface effects in sunspot seismology  

E-Print Network [OSTI]

We show that the use of Doppler shifts of Zeeman sensitive spectral lines to observe wavesn in sunspots is subject to measurement specific phase shifts arising from, (i) altered height range of spectral line formation and the propagating character of p mode waves in penumbrae, and (ii) Zeeman broadening and splitting. We also show that these phase shifts depend on wave frequencies, strengths and line of sight inclination of magnetic field, and the polarization state used for Doppler measurements. We discuss how these phase shifts could contribute to local helioseismic measurements of 'surface effects' in sunspot seismology.

S. P. Rajaguru; K. Sankarasubramanian; R. Wachter; P. H. Scherrer

2006-11-29T23:59:59.000Z

219

A proposed measurement of the reverse Cherenkov radiation effect in a metamaterial-loaded circular waveguide  

SciTech Connect (OSTI)

The authors have recently proposed an experiment on verification of the Reverse Cherenkov Radiation (RCR) effect in a Left-Handed-Material-loaded waveguide. Applications of the RCR effect may range from novel higher-order-mode suppressors in microwave and millimeter-wave sources to improved particle detectors for satellite non-proliferation missions. The experimental configuration includes a circular waveguide filled with an artificial metamaterial with simultaneously negative permittivity and permeability, in which the electromagnetic wave with a frequency of 95 GHz will interact with an electron beam. They have demonstrated that for certain values of effective permittivity and permeability only the backward-propagating mode can be exited by the electron beam. At the conference they will present some newly developed metamaterial designs, which they plan to employ for producing the proper effective medium parameters for this experiment.

Shchegolkov, Dmitry [Los Alamos National Laboratory; Azad, Abul K [Los Alamos National Laboratory; O' Hara, John F [Los Alamos National Laboratory; Smirnova, Evgenya I [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

220

A Knowledge-Based Approach to Improving and Homogenizing Intensity Modulated Radiation Therapy Planning Quality Among Treatment Centers: An Example Application to Prostate Cancer Planning  

SciTech Connect (OSTI)

Purpose: Intensity modulated radiation therapy (IMRT) treatment planning can have wide variation among different treatment centers. We propose a system to leverage the IMRT planning experience of larger institutions to automatically create high-quality plans for outside clinics. We explore feasibility by generating plans for patient datasets from an outside institution by adapting plans from our institution. Methods and Materials: A knowledge database was created from 132 IMRT treatment plans for prostate cancer at our institution. The outside institution, a community hospital, provided the datasets for 55 prostate cancer cases, including their original treatment plans. For each “query” case from the outside institution, a similar “match” case was identified in the knowledge database, and the match case’s plan parameters were then adapted and optimized to the query case by use of a semiautomated approach that required no expert planning knowledge. The plans generated with this knowledge-based approach were compared with the original treatment plans at several dose cutpoints. Results: Compared with the original plan, the knowledge-based plan had a significantly more homogeneous dose to the planning target volume and a significantly lower maximum dose. The volumes of the rectum, bladder, and femoral heads above all cutpoints were nominally lower for the knowledge-based plan; the reductions were significantly lower for the rectum. In 40% of cases, the knowledge-based plan had overall superior (lower) dose–volume histograms for rectum and bladder; in 54% of cases, the comparison was equivocal; in 6% of cases, the knowledge-based plan was inferior for both bladder and rectum. Conclusions: Knowledge-based planning was superior or equivalent to the original plan in 95% of cases. The knowledge-based approach shows promise for homogenizing plan quality by transferring planning expertise from more experienced to less experienced institutions.

Good, David [Medical Physics Graduate Program, Duke University, Durham, North Carolina (United States); Lo, Joseph [Medical Physics Graduate Program, Duke University, Durham, North Carolina (United States); Department of Radiology and Departments of Biomedical Engineering and Electrical and Computer Engineering, Duke University, Durham, North Carolina (United States); Lee, W. Robert [Department of Radiation Oncology, Duke University Medical Center, Durham, North Carolina (United States); Wu, Q. Jackie; Yin, Fang-Fang [Medical Physics Graduate Program, Duke University, Durham, North Carolina (United States); Department of Radiation Oncology, Duke University Medical Center, Durham, North Carolina (United States); Das, Shiva K., E-mail: shiva.das@duke.edu [Medical Physics Graduate Program, Duke University, Durham, North Carolina (United States); Department of Radiation Oncology, Duke University Medical Center, Durham, North Carolina (United States)

2013-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiation measurement quality" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Alanine-EPR dosimetry for measurements of ionizing radiation absorbed doses in the range 0.5-10 kGy  

E-Print Network [OSTI]

The usefulness of two, easy accessible alanine dosimeters (ALANPOL from IChTJ and foil dosimeter from Gamma Service, Radeberg, Germany) to radiation dose measurement in the range of 0.5-10 kGy, were investigated. In both cases, the result of the test was positive. The foil dosemeter from Gamma Service is recommended for dose distribution measurements in fantoms or products, ALANPOL - for routine measurements. The EPR-alanine method based on the described dosimeters can be successfully used, among others, in the technology of radiation protection of food.

Peimel-Stuglik, Z

2001-01-01T23:59:59.000Z

222

Available online at www.sciencedirect.com Radiation Measurements 36 (2003) 161164  

E-Print Network [OSTI]

2003 Abstract Solid state nuclear track detectors are commonly used for measurements of concentrations methodologies regarding short-lived radon progeny has attracted much attention in the Ăżeld of radon dosimetry. There are a few di erent approaches to this problem, all of them being based on the usage of solid state nuclear

Yu, K.N.

223

Radiation Measurements 43 (2008) 14171422 www.elsevier.com/locate/radmeas  

E-Print Network [OSTI]

.40 Keywords: PADC; Tracks; Etching; Light; Simulation 1. Introduction Solid-state nuclear track detectors, scattered light was used to measure track densities from exper- iments related to neutron dosimetry (Harvey) developed a model for laser light scattering by nuclear tracks in CR-39 detectors. The model was based

Yu, K.N.

224

Radiation Measurements 43 (2008) S427S430 www.elsevier.com/locate/radmeas  

E-Print Network [OSTI]

significantly with the building age. © 2008 Elsevier Ltd. All rights reserved. Keywords: Retrospective dosimetry based on nuclear track detectors have been very well established and widely used. Surveys of existing- tion to this problem, retrospective dosimetry based on measure- ments of 210Po activity in objects

Yu, K.N.

225

Aerial Radiation Measurements from the Fukushima Dai-ichi Nuclear Power Plant Accident  

SciTech Connect (OSTI)

This document is a slide show type presentation concerning DOE and Aerial Measuring System (AMS) activities and results with respect to assessing the consequences of the releases from the Fukushima Dai-ichi Nuclear Power Plant. These include ground monitoring and aerial monitoring.

Guss, P. P.

2012-07-16T23:59:59.000Z

226

3 Canopy microclimate measurement This chapter presents methods general to the measurement of climate variables at  

E-Print Network [OSTI]

to maximize data capture and improve signal quality assessment. Duplicate measurements were usually recorded.1. For measurements that did not vary spatially (e.g. incoming solar radiation on a clear day), a single measurement-2 s-1 72 24 Air temperature 0.243 1.5 °C 2 3 Net Radiation 5.174 12 W m-2 14 3 Global short-wave 1

227

Radiation environment simulations at the Tevatron, studies of the beam profile and measurement of the Bc meson mass  

SciTech Connect (OSTI)

The description of a computer simulation of the CDF detector at Fermilab and the adjacent accelerator parts is detailed, with MARS calculations of the radiation background in various elements of the model due to the collision of beams and machine-related losses. Three components of beam halo formation are simulated for the determination of the principal source of radiation background in CDF due to beam losses. The effect of a collimator as a protection for the detector is studied. The simulation results are compared with data taken by a CDF group. Studies of a 150 GeV Tevatron proton beam are performed to investigate the transverse diffusion growth and distribution. A technique of collimator scan is used to scrape the beam under various experimental conditions, and computer programs are written for the beam reconstruction. An average beam halo growth speed is given and the potential of beam tail reconstruction using the collimator scan is evaluated. A particle physics analysis is conducted in order to detect the B{sub c} {yields} J/{psi}{pi} decay signal with the CDF Run II detector in 360 pb{sup -1} of data. The cut variables and an optimization method to determine their values are presented along with a criterion for the detection threshold of the signal. The mass of the B{sub c} meson is measured with an evaluation of the significance of the signal.

Nicolas, Ludovic Y.; /Glasgow U.

2005-09-01T23:59:59.000Z

228

Adaptors for radiation detectors  

DOE Patents [OSTI]

Described herein are adaptors and other devices for radiation detectors that can be used to make accurate spectral measurements of both small and large bulk sources of radioactivity, such as building structures, soils, vessels, large equipment, and liquid bodies. Some exemplary devices comprise an adaptor for a radiation detector, wherein the adaptor can be configured to collimate radiation passing through the adapter from an external radiation source to the radiation detector and the adaptor can be configured to enclose a radiation source within the adapter to allow the radiation detector to measure radiation emitted from the enclosed radiation source.

Livesay, Ronald Jason

2014-04-22T23:59:59.000Z

229

Betatron radiation based measurement of the electron-beam size in a wakefield accelerator  

SciTech Connect (OSTI)

We present a spatial and spectral characterization of a laser-plasma based betatron source which allows us to determine the betatron oscillation amplitude of the electrons which decreases with increasing electron energies. Due to the observed oscillation amplitude and the independently measured x-ray source size of (1.8{+-}0.3){mu}m we are able to estimate the electron bunch diameter to be (1.6{+-}0.3){mu}m.

Schnell, Michael; Saevert, Alexander; Reuter, Maria [Institut fuer Optik und Quantenelektronik, Friedrich- Schiller- Universitaet, Jena (Germany); and others

2012-07-09T23:59:59.000Z

230

Measurements of forbidden line radiation of Ar II (6. 99. mu. m) in W3 IRS 1  

SciTech Connect (OSTI)

Observations of the (Ar II) (6.99 ..mu..m) line flux in W3 IRS 1 are combined with previously obtained measurements of the (Ar III) (8.99 ..mu..m) line flux. The observed ratio of (Ar II)/(Ar III) is inconsistent with the calculated ratio for an H II region with the densities required by radio observations and with a central 40,000--45,000 K star with atmosphere as described by a Mihalas model. A solar effective UV radiation field is required; a dusty model we had previously invoked fits the observations. In addition we determine that the argon abundance is n(Ar)/n(H)roughly-equal8 x 10/sup -6/, a value about twice that usually adopted for normal solar abundance; however, there are uncertainties in the extinction and the model which do not allow us to preclude solar abundance.

Herter, T.; Pipher, J.L.; Helfer, H.L.; Willner, S.P.; Puetter, R.C.; Rudy, R.J.; Soifer, B.T.

1981-03-01T23:59:59.000Z

231

Measurements and modeling of coherent synchrotron radiation and its impact on the Linac Coherent Light Source electron beam  

Science Journals Connector (OSTI)

In order to reach the high peak current required for an x-ray free electron laser, two separate magnetic dipole chicanes are used in the Linac Coherent Light Source accelerator to compress the electron bunch length in stages. In these bunch compressors, coherent synchrotron radiation (CSR) can be emitted either by a short electron bunch or by any longitudinal density modulation that may be on the bunch. In this paper, we report detailed measurements of the CSR-induced energy loss and transverse emittance growth in these compressors. Good agreement is found between the experimental results and multiparticle tracking studies. We also describe direct observations of CSR at optical wavelengths and compare with analytical models based on beam microbunching.

K. L. F. Bane; F.-J. Decker; Y. Ding; D. Dowell; P. Emma; J. Frisch; Z. Huang; R. Iverson; C. Limborg-Deprey; H. Loos; H.-D. Nuhn; D. Ratner; G. Stupakov; J. Turner; J. Welch; J. Wu

2009-03-17T23:59:59.000Z

232

Atmospheric Radiation Measurement (ARM) Data from Manacapuru, Brazil for the Green Ocean Amazon (GOAMAZON) Field Campaign  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

The Amazon rain forest in Brazil is the largest broadleaf forest in the world, covering 7 million square kilometers of the Amazon Basin in South America. It represents over half of the planet’s remaining rain forests, and comprises the most biodiverse tract of tropical rain forest on the planet. Due to the sheer size of the Amazon rain forest, the area has a strong impact on the climate in the Southern Hemisphere. To understand the intricacies of the natural state of the Amazon rain forest, the Green Ocean Amazon, or GOAMAZON, field campaign is a two-year scientific collaboration among U.S. and Brazilian research organizations. They are conducting a variety of different experiments with dozens of measurement tools, using both ground and aerial instrumentation, including the ARM Aerial Facility's G-1 aircraft. For more information on the holistic view of the campaign, see the Department of Energy’s GOAMAZON website. As a critical component of GOAMAZON, the ARM Mobile Facility (AMF) will obtain measurements near Manacapuru, south of Manaus, Brazil, from January to December 2014. The city of Manaus, with a population of 3 million, uses high-sulfur oil as their primary source of electricity. The AMF site is situated to measure the atmospheric extremes of a pristine atmosphere and the nearby cities’ pollution plume, as it regularly intersects with the site. Along with other instrument systems located at the Manacapuru site, this deployment will enable scientists to study how aerosol and cloud life cycles are influenced by pollutant outflow from a tropical megacity.

233

Measuring retail service quality using RSQS and validating RSQS in the context of south indian retail stores; -.  

E-Print Network [OSTI]

??One of the main areas of marketing research has been the study of service quality The increasing growth of service sector has drawn many academicians… (more)

Ramakrishnan, M

2014-01-01T23:59:59.000Z

234

Development and Evaluation of Tools for Measuring the Quality of Experience (QoE) in mHealth Applications  

Science Journals Connector (OSTI)

The rapid spread of smartphones and tablets in the last years has created a new software industry whose fast growth has propitiated numerous low-quality applications to be revised and improved. The main aim of this paper is to develop a tool to assess ... Keywords: Evaluation, Likert, Quality of Experience (QoE), Survey, mHealth

Borja Martínez-Pérez; Isabel Torre-Díez; Sonia Candelas-Plasencia; Miguel López-Coronado

2013-10-01T23:59:59.000Z

235

Measurements of net radiation, ground heat flux and surface temperature in an urban canyon  

SciTech Connect (OSTI)

The Joint Urban 2003 (JU2003) field study was conducted in Oklahoma City in July 2003 to collect data to increase our knowledge of dispersion in urban areas. Air motions in and around urban areas are very complicated due to the influence of urban structures on both mechanical and thermal forcing. During JU2003, meteorological instruments were deployed at various locations throughout the urban area to characterize the processes that influence dispersion. Some of the instruments were deployed to characterize urban phenomena, such as boundary layer development. In addition, particular sites were chosen for more concentrated measurements to investigate physical processes in more detail. One such site was an urban street canyon on Park Avenue between Broadway and Robinson Avenues in downtown Oklahoma City. The urban canyon study was designed to examine the processes that control dispersion within, into and out of the urban canyon. Several towers were deployed in the Park Avenue block, with multiple levels on each tower for observing the wind using sonic anemometers. Infrared thermometers, net radiometers and ground heat flux plates were deployed on two of the towers midway in the canyon to study the thermodynamic effects and to estimate the surface energy balance. We present results from the surface energy balance observations.

Gouveia, F J; Leach, M J; Shinn, J H

2003-11-06T23:59:59.000Z

236

NRC TLD Direct Radiation Monitoring Network progress report, October--December 1994. Volume 14, No. 4  

SciTech Connect (OSTI)

This report presents the results of the NRC Direct Radiation Monitoring Network for the fourth quarter of 1994. It provides the ambient radiation levels measured in the vicinity of 75 sites throughout the United States. In addition, it describes the equipment used, monitoring station selection criteria, characterization of the dosimeter response, calibration procedures, statistical methods, intercomparison, and quality assurance program.

Struckmeyer, R.

1995-03-01T23:59:59.000Z

237

NRC TLD Direct Radiation Monitoring Network. Progress report, October--December 1996  

SciTech Connect (OSTI)

This report presents the results of the NRC Direct Radiation Monitoring Network for the fourth quarter of 1996. It provides the ambient radiation levels measured in the vicinity of 74 sites throughout the United States. In addition, it describes the equipment used, monitoring station selection criteria, characterization of the dosimeter response, calibration procedures, statistical methods, intercomparison, and quality assurance program. 3 figs., 4 tabs.

Struckmeyer, R.

1997-03-01T23:59:59.000Z

238

Time dependence of FEL-induced surface photovoltage on semiconductor interfaces measured with synchroton radiation photoemission spectroscopy  

SciTech Connect (OSTI)

During the last year, the first surface science experiments simultaneously using a Free Electron Laser (FEL) and Synchrotron Radiation (SR) have been performed on SuperACO at LURE (Orsay, France). These {open_quotes}two color{close_quotes} experiments studied the surface photovoltage (SPV) induced on semiconductor surfaces and interfaces by the SuperACO FEL, a storage ring FEL delivering 350 nm photons which am naturally synchronized with the SR; the SPV was measured by synchrotron radiation core-level photoemission spectroscopy on the high-resolution SU3 undulator beamline. We will describe the experimental setup, which allowed us to convey the FEL light onto the samples sitting in the SU3 experimental station by means of a series of mirrors, and show the results we obtained for prototypical systems such as Ag/GaAs(110) and Si(111) 2 x 1. The dependence of the SPV was studied in function of various parameters, changing sample doping and photon flux; but our efforts were mainly devoted to studying its dependence on the time delay between the FEL pump and the SR probe. On SuperACO, such delay can be varied between 1 and 120 ns, the limits being given by the time duration of a SR pulse and by the interval between two consecutive positron bunches, respectively. The results show a clear temporal dependence of the amount of SPV on cleaved Si surfaces, where as the Ag/GaAs(110) does not show any difference on the ns time scale. We will discuss these results in terms of the role of surface recombination in the dynamics of the photoinduced electron-hole pairs. These studies follow the evolution of the density of electrostatic charge at surfaces and interfaces on a nanosecond time scale, and might pave the way for a new series of experiments: for example, one might explore what are the physical mechanisms limiting the time response of Schottky diodes.

Marsi, M. [Ecole Polytechnique Federale de Lausanne (Switzerland); Delboulbe, A.; Garzella, D. [Universite de Paris-Sud, Orsay (France)] [and others

1995-12-31T23:59:59.000Z

239

DEVELOPMENT OF AN ON-LINE, REAL-TIME ALPHA RADIATION MEASURING INSTRUMENT FOR LIQUID STREAMS  

SciTech Connect (OSTI)

The US Department of Energy (DOE) has expressed a need for an on-line, real-time instrument for assaying alpha-emitting radionuclides (uranium and the transuranics) in effluent waters leaving DOE sites to ensure compliance with regulatory limits. Due to the short range of alpha particles in water ({approximately}40 Im), it is necessary now to intermittently collect samples of water and send them to a central laboratory for analysis. A lengthy and costly procedure is used to separate and measure the radionuclides from each sample. Large variations in radionuclide concentrations in the water may go undetected due to the sporadic sampling. Even when detected, the reading may not be representative of the actual stream concentration. To address these issues, the Advanced Technologies Group of Thermo Power Corporation (a Thermo Electron company) is developing a real-time, field-deployable alpha monitor based on a solid-state silicon wafer semiconductor (US Patent 5,652,013 and pending, assigned to the US Department of Energy). The Thermo Water Alpha Monitor will serve to monitor effluent water streams (Subsurface Contaminants Focus Area) and will be suitable for process control of remediation as well as decontamination and decommissioning (D and D) operations, such as monitoring scrubber or rinse water radioactivity levels (Mixed Waste, Plutonium, and D and D Focus Area). It would be applicable for assaying other liquids, such as oil, or solids after proper preconditioning. Rapid isotopic alpha air monitoring is also possible using this technology. This report details the program's accomplishments to date. Most significantly, the Alpha Monitoring Instrument was successfully field demonstrated on water 100X below the Environmental Protection Agency's proposed safe drinking water limit--down to under 1 pCi/1. During the Field Test, the Alpha Monitoring Instrument successfully analyzed isotopic uranium levels on a total of five different surface water, process water, and ground water streams (the primary water types of interest to the DOE). As an example of the user demand for such an analytical instrument, a portion of the Field Test for the Alpha Monitoring Instrument was on the DOE's Oak Ridge Reservation, at two test locations in the Y-12 Site's Bear Creek Valley.

Unknown

1999-03-14T23:59:59.000Z

240

Development and Evaluation of Tools for Measuring the Quality of Experience (QoE) in mHealth Applications  

Science Journals Connector (OSTI)

The rapid spread of smartphones and tablets in the last years has created a new software industry whose fast growth has propitiated numerous low-quality applications to be revised and improved. The main aim of th...

Borja Martínez-Pérez; Isabel de la Torre-Díez…

2013-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiation measurement quality" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Initial optical-transition radiation measurements of the electron beam for the Boeing free-electron-laser experiment  

Science Journals Connector (OSTI)

The potential for characterization of electron beams at ? 100 MeV at the Boeing Free Electron Laser (FEL) facility by optical-transition radiation (OTR) techniques has been demonstrated as an important complement to other diagnostic means. Electron beam properties such as spatial profile and position, current intensity, emittance and energy were studied using OTR. Initial examples including transport through the 5 m wiggler and the resolution of Cherenkov radiation and spontaneous-emission radiation competitive sources are discussed.

A.H. Lumpkin; R.B. Fiorito; D.W. Rule; D.H. Dowell; W.C. Sellyey; A.R. Lowrey

1990-01-01T23:59:59.000Z

242

A compact pyrodetector for measuring the radiation energy of pulsed plasma light sources in the vacuum ultraviolet  

Science Journals Connector (OSTI)

A compact noise-resistant pyroelectric calorimeter has been developed in which radiation is spectrally selected by quartz and inert-gas filters. The calorimeter is ...

Bedrin, A G; Vorypaev, G G; Golubev, E M; Zhilin, A N

2012-01-01T23:59:59.000Z

243

Contributions of the Atmospheric Radiation Measurement (ARM) Program and the ARM Climate Research Facility to the U.S. Climate Change Science Program  

SciTech Connect (OSTI)

The Earth’s surface temperature is determined by the balance between incoming solar radiation and thermal (or infrared) radiation emitted by the Earth back to space. Changes in atmospheric composition, including greenhouse gases, clouds, and aerosols can alter this balance and produce significant climate change. Global climate models (GCMs) are the primary tool for quantifying future climate change; however, there remain significant uncertainties in the GCM treatment of clouds, aerosol, and their effects on the Earth’s energy balance. The 2007 assessment (AR4) by the Intergovernmental Panel on Climate Change (IPCC) reports a substantial range among GCMs in climate sensitivity to greenhouse gas emissions. The largest contributor to this range lies in how different models handle changes in the way clouds absorb or reflect radiative energy in a changing climate (Solomon et al. 2007). In 1989, the U.S. Department of Energy (DOE) Office of Science created the Atmospheric Radiation Measurement (ARM) Program within the Office of Biological and Environmental Research (BER) to address scientific uncertainties related to global climate change, with a specific focus on the crucial role of clouds and their influence on the transfer of radiation in the atmosphere. To address this problem, BER has adopted a unique two-pronged approach: * The ARM Climate Research Facility (ACRF), a scientific user facility for obtaining long-term measurements of radiative fluxes, cloud and aerosol properties, and related atmospheric characteristics in diverse climate regimes. * The ARM Science Program, focused on the analysis of ACRF data to address climate science issues associated with clouds, aerosols, and radiation, and to improve GCMs. This report describes accomplishments of the BER ARM Program toward addressing the primary uncertainties related to climate change prediction as identified by the IPCC.

SA Edgerton; LR Roeder

2008-09-30T23:59:59.000Z

244

Atmospheric Radiation Measurement Program  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

U U r r b b a a n n A A t t m m o o s s p p h h e e r r i i c c O O b b s s e e r r v v a a t t o o r r y y ( ( U U A A O O ) ) F F i i r r s s t t P P l l a a n n n n i i n n g g W W o o r r k k s s h h o o p p - - A A t t t t e e n n d d e e e e s s 2 2 7 7 - - 2 2 8 8 J J a a n n u u a a r r y y , , 2 2 0 0 0 0 3 3 ****************************************************************** Sean Ahearn Hunter College North Bldg., 10 th Floor New York City, NY sca@everest.hunter.cuny.edu (W) 212-772-5327 Robert Bornstein San Jose State University Dept. of Meteorology San Jose, CA 951920-0104 pblmodel@hotmail.com (W) 408-924-5205 (F) 408-924-5191 David Brown Argonne National Lab 9700 S. Cass Avenue Argonne, IL 60439 dbrown@anl.gov (W) 608-442-1249 Michael Brown LANL, Drop Point 19S, SM-30 Bikini Atoll Road Group D4-MS F604 Los Alamos, NM 87545 mbrown@lanl.gov (W) 505- 667-1788

245

Atmospheric Radiation Measurement Program  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

models. As an important factor in growing crops, soil moisture dictates a farmer's success or failure. Too much soil moisture can drown out croplands and cause flooding,...

246

Empirical verification of a mathematical model for measuring the required reduction in process variation to achieve Six-Sigma quality benchmarks  

Science Journals Connector (OSTI)

The measurement and reduction of process variation are recognised in both Total Quality Management and Six-Sigma Strategy as critical drivers of systematic process improvement. However, there exists no systematic computational procedure for measuring the reduction in variation that is required to move a process from a current sigma measure to the Six-Sigma metric. The current Six-Sigma practice simply applies the DMAIC process to compute process sigma metrics, define and launch projects that will simply reduce process variation and measure and compare the resultant sigma measures to the Six-Sigma benchmark, after-the-fact. This paper introduces and empirically evaluates a mathematical model for exactly computing in advance of the specification and launch of improvement projects, the Required Reduction in Process Variation (RRPV) that will drive a process to perform at the Six-Sigma benchmark.

Eisenhower C. Etienne

2009-01-01T23:59:59.000Z

247

Initial experience with single-source dual-energy CT abdominal angiography and comparison with single-energy CT angiography: image quality, enhancement, diagnosis and radiation dose  

Science Journals Connector (OSTI)

To assess image quality of virtual monochromatic spectral (VMS) images, compared to single-energy (SE) CT, and to evaluate the...

Daniella F. Pinho; Naveen M. Kulkarni; Arun Krishnaraj…

2013-02-01T23:59:59.000Z

248

High energy resolution five-crystal spectrometer for high quality fluorescence and absorption measurements on an X-ray Absorption  

E-Print Network [OSTI]

-ray photons from a large solid angle with five spherically bent crystals. It will cover a large energy rangeHigh energy resolution five-crystal spectrometer for high quality fluorescence and absorption however presents some limitations related to the limited energy resolution and saturation. Crystal

Paris-Sud XI, Université de

249

NRC TLD Direct Radiation Monitoring Network. Volume 15, No. 4: Quarterly progress report, October--December 1995  

SciTech Connect (OSTI)

This report presents the results of the NRC Direct Radiation Monitoring Network for the fourth quarter of 1995. It provides the ambient radiation levels measured in the vicinity of 75 sites throughout the United States. In addition, it describes the equipment used, monitoring station selection criteria, characterization of the dosimeter response, calibration procedures, statistical methods, intercomparison, and quality assurance program.

Struckmeyer, R.

1996-03-01T23:59:59.000Z

250

The measurement and verification of parameters of pulse electromagnetic radiation generated by a large-radius ring current  

Science Journals Connector (OSTI)

Experimental and analytic studies of the generation and propagation of electromagnetic radiation due to repetitive current pulses of a nanosecond duration (peak power to 1 MW, current slew rate of 3.5 A/ns) ar...

V. M. Fedorov; E. F. Lebedev; V. E. Ostashev; V. P. Tarakanov…

2000-06-01T23:59:59.000Z

251

Introduction Radiation is the primary energy source and the  

E-Print Network [OSTI]

18 Introduction Radiation is the primary energy source and the ultimate energy sink for the Earth in the Earth's atmosphere and can be used for the evaluation and improvement of models designed for weather. Also, an example of measurement quality control is given. Then it is shown how the calibration

Haak, Hein

252

Data Quality Assessment and Control for the ARM Climate Research Facility  

SciTech Connect (OSTI)

The mission of the Atmospheric Radiation Measurement (ARM) Climate Research Facility is to provide observations of the earth climate system to the climate research community for the purpose of improving the understanding and representation, in climate and earth system models, of clouds and aerosols as well as their coupling with the Earth's surface. In order for ARM measurements to be useful toward this goal, it is important that the measurements are of a known and reasonable quality. The ARM data quality program includes several components designed to identify quality issues in near-real-time, track problems to solutions, assess more subtle long-term issues, and communicate problems to the user community.

Peppler, R

2012-06-26T23:59:59.000Z

253

SOLAR RADIATION PRESSURE AND LOCAL INTERSTELLAR MEDIUM FLOW PARAMETERS FROM INTERSTELLAR BOUNDARY EXPLORER LOW ENERGY HYDROGEN MEASUREMENTS  

SciTech Connect (OSTI)

Neutral hydrogen atoms that travel into the heliosphere from the local interstellar medium (LISM) experience strong effects due to charge exchange and radiation pressure from resonant absorption and re-emission of Ly?. The radiation pressure roughly compensates for the solar gravity. As a result, interstellar hydrogen atoms move along trajectories that are quite different than those of heavier interstellar species such as helium and oxygen, which experience relatively weak radiation pressure. Charge exchange leads to the loss of primary neutrals from the LISM and the addition of new secondary neutrals from the heliosheath. IBEX observations show clear effects of radiation pressure in a large longitudinal shift in the peak of interstellar hydrogen compared with that of interstellar helium. Here, we compare results from the Lee et al. interstellar neutral model with IBEX-Lo hydrogen observations to describe the distribution of hydrogen near 1 AU and provide new estimates of the solar radiation pressure. We find over the period analyzed from 2009 to 2011 that radiation pressure divided by the gravitational force (?) has increased slightly from ? = 0.94 ± 0.04 in 2009 to ? = 1.01 ± 0.05 in 2011. We have also derived the speed, temperature, source longitude, and latitude of the neutral H atoms and find that these parameters are roughly consistent with those of interstellar He, particularly when considering the filtration effects that act on H in the outer heliosheath. Thus, our analysis shows that over the period from 2009 to 2011, we observe signatures of neutral H consistent with the primary distribution of atoms from the LISM and a radiation pressure that increases in the early rise of solar activity.

Schwadron, N. A.; Moebius, E.; Kucharek, H.; Lee, M. A.; French, J. [University of New Hampshire, Durham, NH 03824 (United States); Saul, L.; Wurz, P. [University of Bern, 3012 Bern (Switzerland); Bzowski, M. [Space Research Centre of the Polish Academy of Sciences, Warsaw (Poland); Fuselier, S. A.; Livadiotis, G.; McComas, D. J. [Southwest Research Institute, San Antonio, TX 78228 (United States); Frisch, P. [University of Chicago, Chicago, IL 60637 (United States); Gruntman, M. [University of Southern California, Los Angeles, CA 90089 (United States); Mueller, H. R. [Dartmouth College, Hanover, NH 03755 (United States)

2013-10-01T23:59:59.000Z

254

Measurement and Modeling of Vertically Resolved Aerosol Optical Properties and Radiative Fluxes Over the ARM SGP Site During the May 2003 Aerosol IOP  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Measurement and Modeling Measurement and Modeling of Vertically Resolved Aerosol Optical Properties and Radiative Fluxes Over the ARM SGP Site During the May 2003 Aerosol IOP B. Schmid and J. Redemann Bay Area Environmental Research Institute National Aeronautics and Space Administration Ames Research Center Moffett Field, California W. P. Arnott Desert Research Institute Reno, Nevada A. Bucholtz and J. Reid Naval Research Laboratory Monterey, California P. Colarco Earth System Science Interdisciplinary Center University of Maryland College Park, Maryland D. Covert and R. Elleman University of Washington Seattle, Washington J. Eilers, P. Pilewskie, and A. Strawa National Aeronautics and Space Administration Ames, Research Center Moffett Field, California R. A. Ferrare

255

Evaluation of Radiometric Measurements from the NASA Multiangle Imaging Spectroradiometer (MISR): Two- and Three-Dimensional Radiative Transfer Modeling of an Inhomogeneous Stratocumulus Cloud Deck  

SciTech Connect (OSTI)

In December 1999, NASA launched the Terra satellite. This platform carries five instruments that measure important properties of the Earth climate system. One of these instruments is the Multiangle Imaging Spectroradiometer, or MISR. This instrument measures light reflected from the Earth at a spatial resolution of 275-1100 m, at four wavelengths (446, 558, 672, and 866 nm), and at nine different viewing angles that vary from +70 to -70 degrees along the direction of flight [Diner et al., 2002]. These multiangle data have the potential to provide information on aerosols, surface, and cloud characteristics that compliments traditional single-view-direction satellite measurements. Before this potential can be realized, the accuracy of the satellite radiance measurements must be carefully assessed, and the implications of the radiometric accuracy on remote-sensing algorithms must be evaluated. In this article, we compare MISR multiangle measurements against two-dimensional (2-D) and 3-D radiative transfer calculations from an inhomogeneous cloud scene. Inputs to the radiative transfer code are based entirely on independently gathered data (ground-based radar, lidar, microwave radiometer, in situ aircraft data, etc.). The 2-D radiative transfer calculations compare favorably near nadir and in most of the forward scattering directions, but differ by as much as 10% in the backscattering directions. Using 3-D radiative transfer modeling, we show that this difference is due to the 3-D structure of the cloud deck, including variations in the cloud top height on scales less than 275 m, which are not resolved in the 2-D simulations. Comparison of the 2-D calculations to the MISR measurements, after accounting for the 3-D structure, show residual differences that are less than 4% at all angles at the MISR blue and green wavelengths. The comparison also reveals that the MISR measurements at the red and near-infrared wavelengths are too bright relative to measurements in the blue and green bands. On the basis of the results of this study, along with results from five other comparisons, the MISR calibration is being adjusted to reduce the red and nearinfrared Radiances.

Marchand, Roger T.; Ackerman, Thomas P.

2004-09-29T23:59:59.000Z

256

Use of the ARM Measurements of Spectral Zenith Radiance for Better Understanding of 3D Cloud-Radiation Processes & Aerosol-Cloud Interaction  

SciTech Connect (OSTI)

We proposed a variety of tasks centered on the following question: what can we learn about 3D cloud-radiation processes and aerosol-cloud interaction from rapid-sampling ARM measurements of spectral zenith radiance? These ARM measurements offer spectacular new and largely unexploited capabilities in both the temporal and spectral domains. Unlike most other ARM instruments, which average over many seconds or take samples many seconds apart, the new spectral zenith radiance measurements are fast enough to resolve natural time scales of cloud change and cloud boundaries as well as the transition zone between cloudy and clear areas. In the case of the shortwave spectrometer, the measurements offer high time resolution and high spectral resolution, allowing new discovery-oriented science which we intend to pursue vigorously. Research objectives are, for convenience, grouped under three themes: â?˘ Understand radiative signature of the transition zone between cloud-free and cloudy areas using data from ARM shortwave radiometers, which has major climatic consequences in both aerosol direct and indirect effect studies. â?˘ Provide cloud property retrievals from the ARM sites and the ARM Mobile Facility for studies of aerosol-cloud interactions. â?˘ Assess impact of 3D cloud structures on aerosol properties using passive and active remote sensing techniques from both ARM and satellite measurements.

Alexander Marshak; Warren Wiscombe; Yuri Knyazikhin; Christine Chiu

2011-05-24T23:59:59.000Z

257

Apparatus and procedure to characterize the surface quality of conductors by measuring the rate of cathode emission as a function of surface electric field strength  

DOE Patents [OSTI]

A device and method for characterizing quality of a conducting surface. The device including a gaseous ionizing chamber having centrally located inside the chamber a conducting sample to be tested to which a negative potential is applied, a plurality of anode or "sense" wires spaced regularly about the central test wire, a plurality of "field wires" at a negative potential are spaced regularly around the sense, and a plurality of "guard wires" at a positive potential are spaced regularly around the field wires in the chamber. The method utilizing the device to measure emission currents from the conductor.

Mestayer, Mac; Christo, Steve; Taylor, Mark

2014-10-21T23:59:59.000Z

258

Studies on the Use of Liquid Surface Passivation for Lifetime Measurements on Good-Quality Silicon Wafers  

SciTech Connect (OSTI)

We evaluated several liquid passivants, viz. solutions of iodine ethanol (IE), quinhydrone methanol (QHM), and potassium cyanide (KCN), for measuring minority-carrier lifetime. Lifetime was measured by the WCT-100 (Sinton Instruments) and WT-2000 (Semilab). Our results show that both IE and QHM passivation are reliable mechanisms. We also find that the KCN solution is moderately passivating on oxidized surfaces, but is only minimally effective on bare Si surfaces. This paper presents details of our studies. In particular, the effect of illumination on IE-passivated surfaces and possible reasons for variations in lifetime measurement are discussed.

Devayajanam, S.; Rupnowski, P.; Shet, S.; Sopori, B. L.; Ravindra, N. M.; Caskey, D.; Chang, J.; Covington, J.

2011-01-01T23:59:59.000Z

259

Development of Simplified Calculations for a Multipyranometer Array for the Measurement of Direct and Diffuse Solar Radiation  

E-Print Network [OSTI]

in Finland by M. HW1'aien et al. (1985). Further development on the MPA was performed in several countries ineluding the United States where Perez (1986) presented a method for deriving beam radiation from a series of vertically mounted pyranometers...

Munger, B. K.; Haberl, J. S.

2000-01-01T23:59:59.000Z

260

Comparison between Model Simulations and Measurements of Hyperspectral Far- infrared Radiation from FIRST during the RHUBC-II Campaign  

E-Print Network [OSTI]

for its dry, cold, and dominantly clear atmosphere, which is optimal for studying the effects, that water vapor and cirrus clouds have on the far-IR. Comparisons with Line-By-Line Discrete Ordinants Radiative Transfer model, LBLDIS, show that FIRST...

Baugher, Elizabeth

2012-02-14T23:59:59.000Z

Note: This page contains sample records for the topic "radiation measurement quality" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Tools for Viewing and Quality Checking ARM Data  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Tools for Viewing and Quality Checking ARM Data Tools for Viewing and Quality Checking ARM Data S. Bottone and S. Moore Mission Research Corporation Santa Barbara, California Introduction Mission Research Corporation (MRC) is developing software tools to assist the Atmospheric Radiation Measurement (ARM) Data Quality Office with their data inspection tasks. One such tool is NCVweb, a web-based data analysis and visualization tool that allows for easy viewing of ARM NetCDF data files. This tool helps to eliminate the need of and problems associated with downloading large volumes of data, installing and configuring visualization software, or writing custom data exploration software. It has been upgraded this year with many new features described below. NCVweb can be used at the ARM Data Quality website directly via http://dq.arm.gov/ncvweb/ncvweb.cgi, or via the Data Quality

262

Use of the ARM Measurements of Spectral Zenith Radiance for Better Understanding of 3D Cloud-Radiation Processes & Aerosol-Cloud Interaction  

SciTech Connect (OSTI)

This project focuses on cloud-radiation processes in a general three-dimensional cloud situation, with particular emphasis on cloud optical depth and effective particle size. The proposal has two main parts. Part one exploits the large number of new wavelengths offered by the Atmospheric Radiation Measurement (ARM) zenith-pointing ShortWave Spectrometer (SWS), to develop better retrievals not only of cloud optical depth but also of cloud particle size. We also take advantage of the SWS’ high sampling resolution to study the “twilight zone” around clouds where strong aerosol-cloud interactions are taking place. Part two involves continuing our cloud optical depth and cloud fraction retrieval research with ARM’s 2-channel narrow vield-of-view radiometer and sunphotometer instrument by, first, analyzing its data from the ARM Mobile Facility deployments, and second, making our algorithms part of ARM’s operational data processing.

Chiu, Jui-Yuan Christine [University of Reading] [University of Reading

2014-04-10T23:59:59.000Z

263

radiation.p65  

Office of Legacy Management (LM)

5 5 United States Department of Energy This fact sheet explains the potential health hazards associated with the radioactive decay of uranium and other radioactive elements found in ore and mill tailings. Potential Health Hazards of Radiation Man-made sources of radiation, most notably from medical uses and consumer products, contribute to the remaining radiation dose that individuals receive. A few household products, including smoke detectors, micro- wave ovens, and color televisions, emit small amounts of radiation. For most people, the benefits from using such products far outweigh the radiation risks. Radiation Dose Radiation is measured in various units. Individuals who have been exposed to radiation have received a radiation dose. Radiation dose to people is expressed in

264

Energy savings and cost-effectiveness of heat exchanger use as an indoor air quality mitigation measure in the BPA weatherization program  

Science Journals Connector (OSTI)

The Bonneville Power Administration (BPA) has proposed a ten year program to encourage the weatherization of electrically heated homes in the Pacific Northwest. The purpose of this program is to reduce residential electrical energy demand for space heating. If air infiltration rates are reduced by employing house tightening measures, indoor air quality mitigation measures may be required in residences with significant sources of indoor air contaminants. The use of residential air-to-air heat exchangers has been proposed as a possible strategy to assure that indoor air quality is not substantially degraded by house tightening. We examine the energy impact and cost effectiveness of heat exchanger utilization in tightened homes in the BPA region. Significant energy savings are predicted if homes are tightened and heat exchangers are utilized. From the homeowner's perspective, the results of our economic analysis indicate that, at the relatively low residential electric rates in the BPA region, the use of heat exchangers in existing homes that are tightened is not economically viable. On the other hand, from the utility perspective, it may be cost effective to use heat exchangers in the weatherization program if the marginal cost to the utility is compared with the cost of conserved energy.

Isaac Turiel; William J. Fisk; Mark Seedall

1983-01-01T23:59:59.000Z

265

Perception of risk: proceedings of the XVth annual meeting of the National Council on Radiation Protection and Measurements  

SciTech Connect (OSTI)

The book is a conglomerate of formal papers, discussions, and the textual minutes of a round table discussion with audience participation. The first part, and most interesting from my view-point, deals with the perception of risk or harm and societal attitudes. The second part contains papers that seem to be historical primers concerning radiobiology. This subject is surrounded by controversy, and it seems in part to be approached as an elephant would be by a tribe of blind zoologists. They poke and pinch, sometimes describe small parts in great detail, but never exactly circumscribe the object of the study. The purpose is to present a discussion of the harm due to radiation, specifically radiation from power sources. Closely related to this is the question of the regulatory agencies' role.

Goris, M.L.

1981-03-01T23:59:59.000Z

266

Impact of solvent quality on the density profiles of looped triblock copolymer brushes by neutron reflectivity measurements  

SciTech Connect (OSTI)

Preferential adsorption of poly(2-vinylpyridine)-deuterated polystyrene-poly(2-vinylpyridine) (PVP-dPS-PVP) triblock copolymers from toluene onto silicon leads to the formation of dPS loops tethered by the PVP end blocks. Using neutron reflectometry, we have determined the segment density profiles of these looped polymer brushes in toluene, a good solvent for the dPS block, and in cyclohexane at 20 C (poor solvent), 32 C, (near- solvent), and 50 C (marginal solvent). While the swelling behavior qualitatively agrees with that observed for singly grafted brushes, there are interesting differences in the local structural details: In a good solvent, the segment density profiles are composed of an inner parabolic region and a long, extended tail. In cyclohexane, the profiles are described by exponential decays. We ascribe these features to a novel polydispersity effect that arises due to tethering the PS loops by both ends. The results also show that the less dense layers undergo more significant changes in swollen height as solvent quality is changed and that the looped brushes of different molecular weight, asymmetry, and tethering density adhere to scaling relationships derived for lightly cross-linked polymer gels.

Huang, Zhenyu [University of Tennessee, Knoxville (UTK); Alonzo, Jose [Clemson University; Liu, Ming [ORNL; Ji, Haining [ORNL; Yin, Fang [University of Utah; Smith, Grant [ORNL; Mays, Jimmy [ORNL; Kilbey, II, S Michael [ORNL; Dadmun, Mark D [ORNL

2008-01-01T23:59:59.000Z

267

Prospectively ECG-triggered high-pitch coronary angiography with third-generation dual-source CT at 70 kVp tube voltage: Feasibility, image quality, radiation dose, and effect of iterative reconstruction  

Science Journals Connector (OSTI)

AbstractBackground Low tube voltage reduces radiation exposure in coronary CT angiography (CTA). Using 70 kVp tube potential has so far not been possible because CT systems were unable to provide sufficiently high tube current with low voltage. Objective We evaluated feasibility, image quality (IQ), and radiation dose of coronary CTA using a third-generation dual-source CT system capable of producing 450 mAs tube current at 70 kVp tube voltage. Methods Coronary CTA was performed in 26 consecutive patients with suspected coronary artery disease, selected for body weight pitch spiral acquisition was used. Filtered back projection (FBP) and iterative reconstruction (IR) algorithms were applied. IQ was assessed using a 4-point rating scale (1 = excellent, 4 = nondiagnostic) and objective parameters. Results Mean age was 62 ± 9 years (46% males; mean body mass index, 27.7 ± 3.8 kg/m2; mean heart rate, 54 ± 5 beats/min). Mean dose-length product was 20.6 ± 1.9 mGy × cm; mean estimated effective radiation dose was 0.3 ± 0.03 mSv. Diagnostic IQ was found in 365 of 367 (FBP) and 366 of 367 (IR) segments (P nonsignificant). IQ was rated “excellent” in 53% (FBP) and 86% (IR) segments (P = .001) and “nondiagnostic” in 2 (FBP) and 1 segment (IR) (P nonsignificant). Mean IQ score was lesser in FBP vs IR (1.5 ± 0.4 vs 1.1 ± 0.2; P pitch spiral acquisition and 70 kVp tube voltage is feasible and provides both robust IQ and very low radiation exposure.

Michaela M. Hell; Daniel Bittner; Annika Schuhbaeck; Gerd Muschiol; Michael Brand; Michael Lell; Michael Uder; Stephan Achenbach; Mohamed Marwan

2014-01-01T23:59:59.000Z

268

Measurement  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

localization that limits the present measurements. The knowledge thus gained will have input not only to fusion research, but to may ques- tions of basic plasma physics....

269

Measurement  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

in the Department of Physics & Astronomy. Chapel Hill 2005 Approved: A. E. Champagne, Advisor J. C. Blackmon, Reader C. Iliadis, Reader ABSTRACT Ryan P. Fitzgerald: Measurement of...

270

radiation.cdr  

Office of Legacy Management (LM)

Radiation-It's a Fact of Life Radiation-It's a Fact of Life It has been with us since the beginning of time. Everyone who has ever walked on this planet has been exposed to radiation. For the most part, nature is the largest source of exposure. It's in the air we breathe, the ground we walk on, and even the food we eat. The radiation we receive from all natural and some man-made sources is called "background radiation." The millirem (mrem) is a unit used for measuring radiation received by a person. The total average background for radiation received by people living in the United States is 360 millirem per year (mrem/yr), of which 300 mrem/yr is from natural sources, and 60 mrem/yr is man-made. Cosmic Radiation from the sun and stars Internal Radiation from naturally radioactive

271

Radiation protection and measurement issues related to cargo scanning with accelerator-produced high-energy X rays, NCRP Commentary No. 20  

Science Journals Connector (OSTI)

......December 2008 book-review Book Review Radiation protection...technology in the current regulatory environment. The Introduction...radiation protection plan. Although there is not...radiation protection plan, the information can......

Robert May

2008-12-01T23:59:59.000Z

272

Fundamentals of health physics for the radiation-protection officer  

SciTech Connect (OSTI)

The contents of this book on health physics include chapters on properties of radioactive materials, radiation instrumentation, radiation protection programs, radiation survey programs, internal exposure, external exposure, decontamination, selection and design of radiation facilities, transportation of radioactive materials, radioactive waste management, radiation accidents and emergency preparedness, training, record keeping, quality assurance, and appraisal of radiation protection programs. (ACR)

Murphy, B.L.; Traub, R.J.; Gilchrist, R.L.; Mann, J.C.; Munson, L.H.; Carbaugh, E.H.; Baer, J.L.

1983-03-01T23:59:59.000Z

273

Atmospheric Radiation Measurement (ARM) Data from Cape Cod, Massachusetts for the Two-Column Aerosol Project (TCAP)  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

The Two-Column Aerosol Project (TCAP) was designed to provide a detailed set of observations with which to (1) perform radiative and cloud condensation nuclei (CCN) closure studies, (2) evaluate a new retrieval algorithm for aerosol optical depth (AOD) in the presence of clouds using passive remote sensing, (3) extend a previously developed technique to investigate aerosol indirect effects, and (4) evaluate the performance of a detailed regional-scale model and a more parameterized global-scale model in simulating particle activation and AOD associated with the aging of anthropogenic aerosols. To meet these science objectives, the ARM Mobile Facility and the Mobile Aerosol Observing System were deployed on Cape Cod, Massachusetts, for a 12-month period starting in the summer of 2012 in order to quantify aerosol properties, radiation, and cloud characteristics at a location subject to both clear and cloudy conditions, and clean and polluted conditions. These observations were supplemented by two aircraft intensive observation periods, one in the summer and a second in the winter.

274

Quality Assurance: Quality Policy  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Policy Policy It is the policy of the Department of Energy to establish quality requirements to ensure that risks and environmental impacts are minimized and that safety, reliability, and performance are maximized through the application of effective management systems commensurate with the risks posed by the facility or activity and its work. The Department implements this policy through the QA Order and the QA rule directives to ensure quality assurance requirements are clearly specified for the broad spectrum of work performed by DOE and its contractors. Objective The objective of the QA requirements are to establish an effective management system (i.e., quality assurance programs) using the performance requirements coupled technical standards where appropriate that ensure:

275

ARM - Measurement - Atmospheric temperature  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

temperature temperature ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Atmospheric temperature The temperature indicated by a thermometer exposed to the air in a place sheltered from direct solar radiation. Categories Atmospheric State Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments AERI : Atmospheric Emitted Radiance Interferometer SONDE : Balloon-Borne Sounding System CO2FLX : Carbon Dioxide Flux Measurement Systems ECOR : Eddy Correlation Flux Measurement System

276

Measurements of photon ionizing radiation fields in the reactor room of the 4th power-generating unit of the chernobyl nuclear power plant  

Science Journals Connector (OSTI)

A radiation examination of the reactor room of the damaged fourth unit of the Chernobyl nuclear power plant was performed. The most strongly radiating surfaces...

A. G. Volkovich; V. N. Potapov; S. V. Smirnov; L. I. Urutskoev…

2000-03-01T23:59:59.000Z

277

Surface Radiation from GOES: A Physical Approach; Preprint  

SciTech Connect (OSTI)

Models to compute Global Horizontal Irradiance (GHI) and Direct Normal Irradiance (DNI) have been in development over the last 3 decades. These models can be classified as empirical or physical, based on the approach. Empirical models relate ground based observations with satellite measurements and use these relations to compute surface radiation. Physical models consider the radiation received from the earth at the satellite and create retrievals to estimate surface radiation. While empirical methods have been traditionally used for computing surface radiation for the solar energy industry the advent of faster computing has made operational physical models viable. The Global Solar Insolation Project (GSIP) is an operational physical model from NOAA that computes GHI using the visible and infrared channel measurements from the GOES satellites. GSIP uses a two-stage scheme that first retrieves cloud properties and uses those properties in a radiative transfer model to calculate surface radiation. NREL, University of Wisconsin and NOAA have recently collaborated to adapt GSIP to create a 4 km GHI and DNI product every 30 minutes. This paper presents an outline of the methodology and a comprehensive validation using high quality ground based solar data from the National Oceanic and Atmospheric Administration (NOAA) Surface Radiation (SURFRAD) (http://www.srrb.noaa.gov/surfrad/sitepage.html) and Integrated Surface Insolation Study (ISIS) http://www.srrb.noaa.gov/isis/isissites.html), the Solar Radiation Research Laboratory (SRRL) at National Renewable Energy Laboratory (NREL), and Sun Spot One (SS1) stations.

Habte, A.; Sengupta, M.; Wilcox, S.

2012-09-01T23:59:59.000Z

278

Validation of Surface Retrieved Cloud Optical Properties with in situ Measurements at the Atmospheric Radiation Measurement Program (ARM) South Great Plains Site  

SciTech Connect (OSTI)

The surface inferred cloud optical properties from a multifilter rotating shadowband radiometer have been validated against the in situ measurements during the second ARM Enhanced Shortwave Experiment (ARESE II) field campaign at the ARM South Great Plains (SGP) site. On the basis of eight effective radius profiles measured by the in situ Forward Spectra Scattering Probe (FSSP), our retrieved cloud effective radii for single-layer warm water clouds agree well with in situ measurements, within 5.5%. The sensitivity study also illustrates that for this case a 13% uncertainty in observed liquid water path (LWP, 20 g/m2) results in 1.5% difference in retrieved cloud optical depth and 12.7% difference in referred cloud effective radius, on average. The uncertainty of the LWP measured by the microwave radiometer (MWR) is the major contributor to the uncertainty of retrieved cloud effective radius. Further, we conclude that the uncertainty of our inferred cloud optical properties is better than 5% for warm water clouds based on a surface closure study, in which cloud optical properties inferred from narrowband irradiances are applied to a shortwave model and the modeled broadband fluxes are compared to a surface pyranometer.

Min, Qilong; Duan, M.; Marchand, Roger T.

2003-09-11T23:59:59.000Z

279

ARM - Measurement - Surface skin temperature  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

skin temperature skin temperature ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Surface skin temperature The radiative surface skin temperature, from an IR thermometer measuring the narrowband radiating temperature of the ground surface in its field of view. Categories Radiometric, Surface Properties Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments IRT : Infrared Thermometer MFRIRT : Multifilter Radiometer and Infrared Thermometer External Instruments

280

E-Print Network 3.0 - assessing radiation dose Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of radiation; radiation measurement; and dose information. ATOMS... Assessments, DOETIC-11026. RADIATION Radiation, or radiant energy, is energy in the form of waves... )...

Note: This page contains sample records for the topic "radiation measurement quality" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Incorporating biologic measurements (SF2, CFE) into a tumor control probability model increases their prognostic significance: a study in cervical carcinoma treated with radiation therapy  

Science Journals Connector (OSTI)

Purpose: To assess whether incorporation of measurements of surviving fraction at 2 Gy (SF2) and colony-forming efficiency (CFE) into a tumor control probability (tcp) model increases their prognostic significance. Methods and Materials: Measurements of SF2 and CFE were available from a study on carcinoma of the cervix treated with radiation alone. These measurements, as well as tumor volume, dose, and treatment time, were incorporated into a Poisson tcp model (tcp?,?). Regression analysis was performed to assess the prognostic power of tcp?,? vs. the use of either tcp models with biologic parameters fixed to best-fit estimates (but incorporating individual dose, volume, and treatment time) or the use of SF2 and CFE measurements alone. Results: In a univariate regression analysis of 44 patients, tcp?,? was a better prognostic factor for both local control and survival (p CFE alone (p = 0.015 for local control, p = 0.38 for survival). In multivariate analysis, tcp?,? emerged as the most important prognostic factor for local control (p CFE was still a significant independent prognostic factor for local control, whereas SF2 was not. The sensitivities of tcp?,? and SF2 as predictive tests for local control were 87% and 65%, respectively. Specificities were 70% and 77%, respectively. Conclusions: A Poisson tcp model incorporating individual SF2, CFE, dose, tumor volume, and treatment time was found to be the best independent prognostic factor for local control and survival in cervical carcinoma patients.

Francesca Meteora Buffa; Susan E. Davidson; Robert D. Hunter; Alan E. Nahum; Catharine M.L. West

2001-01-01T23:59:59.000Z

282

Atmospheric Radiation Measurement (ARM) Data from Black Forest Germany for the Convective and Orographically Induced Precipitation Study (COPS)  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

The primary goal of the ARM Program is to improve the treatment of cloud and radiation physics in global climate models in order to improve the climate simulation capabilities of these models. ARM maintains four major, permanent sites for data collection and deploys the ARM Mobile Facility (AMF) to other sites as determined. In 2007 the AMF operated in the Black Forest region of Germany as part of the Convective and Orographically Induced Precipitation Study (COPS). Scientists studied rainfall resulting from atmospheric uplift (convection) in mountainous terrain, otherwise known as orographic precipitation. This was part of a six -year duration of the German Quantitative Precipitation Forecasting (QPF) Program. COPS was endorsed as a Research and Development Project by the World Weather Research Program. This program was established by the World Meteorological Organization to develop improved and cost-effective forecasting techniques, with an emphasis on high-impact weather. A large collection of data plots based on data streams from specific instruments used at Black Forest are available via a link from ARM's Black Forest site information page. Users will be requested to create a password, but the plots and the data files in the ARM Archive are free for viewing and downloading.

283

NREL: Solar Radiation Research - Optical Metrology Laboratory  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Optical Metrology Laboratory Optical Metrology Laboratory Photo of a laser and a spectral irradiance calibration system used to create lamp-detector alignment. Researchers use a spectral irradiance calibration alignment jig and a laser beam to align a calibration source and test unit. The NREL Optical Metrology Laboratory ensures that optical radiation resource measurement equipment is calibrated to national or international standards to ensure the quality and traceability of data. NREL considers optical radiation to range from 250 nm to 2,500 nm and to include the ultraviolet (250-400 nm), visible (400-750 nm), near infrared (750-1,100 nm), and shortwave infrared (1,100-2,500 nm) ranges. Activities The Optical Metrology Laboratory provides National Institute of Standards and Technology-traceable measurements for:

284

NREL: Solar Radiation Research - Research Staff  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Research Staff Research Staff NREL's resource assessment and forecasting research staff provides expertise in renewable energy measurement and instrumentation through NREL's Power Systems Engineering Center. Photo of Mary Anderberg Mary Anderberg - Scientist M.S. Physics, University of Denver B.S. Physics, Auburn University Mary performs solar radiometric data quality analysis for the U.S. Department of Energy's Atmospheric Radiation Measurement program and provides programming support for the resource integration section. She also contributed to the National Solar Radiation Database update. In addition, Mary is the Web administrator of the Renewable Resource Data Center, for which she provides UNIX, C, Perl, and HTML support. Photo of AfshĂ­n Andreas AfshĂ­n Andreas - Senior Scientist

285

Atmospheric Radiation Measurement (ARM) Data from Los Angeles, California, to Honolulu, Hawaii for the Marine ARM GPCI Investigation of Clouds (MAGIC) Field Campaign (an AMF2 Deployment)  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

From October 2012 through September 2013, the second ARM Mobile Facility (AMF2) was deployed on the container ship Spirit, operated by Horizon Lines, for the Marine ARM GPCI* Investigation of Clouds (MAGIC) field campaign. During approximately 20 round trips between Los Angeles, California, and Honolulu, Hawaii, AMF2 obtained continuous on-board measurements of cloud and precipitation, aerosols, and atmospheric radiation; surface meteorological and oceanographic variables; and atmospheric profiles from weather balloons launched every six hours. During two two-week intensive observational periods in January and July 2013, additional instruments were deployed and balloon soundings were be increased to every three hours. These additional data provided a more detailed characterization of the state of the atmosphere and its daily cycle during two distinctly different seasons. The primary objective of MAGIC was to improve the representation of the stratocumulus-to-cumulus transition in climate models. AMF2 data documented the small-scale physical processes associated with turbulence, convection, and radiation in a variety of marine cloud types.

286

Radioactivity and Radiation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Radioactivity and Radiation Radioactivity and Radiation Uranium and Its Compounds line line What is Uranium? Chemical Forms of Uranium Properties of Uranium Compounds Radioactivity and Radiation Uranium Health Effects Radioactivity and Radiation Discussion of radioactivity and radiation, uranium and radioactivity, radiological health risks of uranium isotopes and decay products. Radioactivity Radioactivity is the term used to describe the natural process by which some atoms spontaneously disintegrate, emitting both particles and energy as they transform into different, more stable atoms. This process, also called radioactive decay, occurs because unstable isotopes tend to transform into a more stable state. Radioactivity is measured in terms of disintegrations, or decays, per unit time. Common units of radioactivity

287

Lesson 4 - Ionizing Radiation | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

4 - Ionizing Radiation 4 - Ionizing Radiation Lesson 4 - Ionizing Radiation Lesson Three showed that unstable isotopes emit energy as they become more stable. This energy is known as radiation. This lesson explores forms of radiation, where radiation is found, how we detect and measure radiation, what sources of radiation people are exposed to, whether radiation is harmful, and how we can limit our exposure. Specific topics covered in this lesson include: Types of radiation Non-ionizing Ionizing Forms of ionizing radiation Alpha particles Beta particles Gamma rays Radiation Decay chain Half-life Dose Radiation measurements Sources of radiation Average annual exposure Lesson 4 - Ionizing Radiation.pptx More Documents & Publications DOE-HDBK-1130-2008 DOE-HDBK-1130-2008 DOE-HDBK-1130-2007

288

The BOOMERANG North America Instrument: A Balloon-borne Bolometric Radiometer Optimized for Measurements of Cosmic Background Radiation Anisotropies from 03 to 4°  

Science Journals Connector (OSTI)

We describe the BOOMERANG North America instrument, a balloon-borne bolometric radiometer designed to map the cosmic microwave background (CMB) radiation with 03 resolution over a significant portion of the sky. This receiver employs new technologies in bolometers, readout electronics, millimeter-wave optics and filters, cryogenics, scan, and attitude reconstruction. All these subsystems are described in detail in this paper. The system has been fully calibrated in flight using a variety of techniques, which are described and compared. Using this system, we have obtained a measurement of the first peak in the CMB angular power spectrum in a single, few hour long balloon flight. The instrument described here was a prototype of the BOOMERANG Long Duration Balloon experiment.

F. Piacentini; P. A. R. Ade; R. S. Bhatia; J. J. Bock; A. Boscaleri; P. Cardoni; B. P. Crill; P. de Bernardis; H. Del Castillo; G. De Troia; P. Farese; M. Giacometti; E. F. Hivon; V. V. Hristov; A. Iacoangeli; A. E. Lange; S. Masi; P. D. Mauskopf; L. Miglio; C. B. Netterfield; P. Palangio; E. Pascale; A. Raccanelli; S. Rao; G. Romeo; J. Ruhl; F. Scaramuzzi

2002-01-01T23:59:59.000Z

289

Pilot Implementation of a Field Study Design to Evaluate the Impact of Source Control Measures on Indoor Air Quality in High Performance Homes  

SciTech Connect (OSTI)

To improve the indoor air quality in new, high performance homes, a variety of standards and rating programs have been introduced to identify building materials that are designed to have lower emission rates of key contaminants of concern and a number of building materials are being introduced that are certified to these standards. For example, the U.S. Department of Energy (DOE) Zero Energy Ready Home program requires certification under the U.S. Environmental Protection Agency (EPA) Indoor airPLUS (IaP) label, which requires the use of PS1 or PS2 certified plywood and OSB; low-formaldehyde emitting wood products; low- or no-VOC paints and coatings as certified by Green Seal Standard GS-11, GreenGuard, SCS Indoor Advantage Gold Standard, MPI Green Performance Standard, or another third party rating program; and Green Label-certified carpet and carpet cushions. However, little is known regarding the efficacy of the IAP requirements in measurably reducing contaminant exposures in homes. The goal of this project is to develop a robust experimental approach and collect preliminary data to support the evaluation of indoor air quality (IAQ) measures linked to IAP-approved low-emitting materials and finishes in new residential homes. To this end, the research team of Pacific Northwest National Laboratory (PNNL) and Lawrence Berkeley National Laboratory (LBNL) developed a detailed experimental plan to measure IAQ constituents and other parameters, over time, in new homes constructed with materials compliant with IAP’s low-emitting material and ventilation requirements (i.e., section 6.1, 6.2, 6.3, and 7.2) and similar homes constructed to the state building code with conventional materials. The IAQ in IAP and conventional homes of similar age, location, and construction style is quantified as the differences in the speciated VOC and aldehyde concentrations, normalized to dilution rates. The experimental plan consists of methods to evaluate the difference between low-emitting and “conventional” materials as installed in newly constructed residential homes using both (1) highly controlled, short-term active samples to precisely characterize the building-related chemical emissions and building contents and (2) a week-long passive sample designed to capture the impact of occupant behavior and related activities on measured IAQ contaminant levels indoors. The combination of detailed short-term measurements with the home under controlled/consistent conditions during pre- and post-occupancy and the week-long passive sampling data provide the opportunity to begin to separate the different emission sources and help isolate and quantify variability in the monitored homes. Between April and August 2014, the research team performed pre-occupancy and post-occupancy sampling in one conventional home and two homes built with low-emitting materials that were generally consistent with EPA’s Indoor airPLUS guidelines. However, for a number of reasons, the full experimental plan was not implemented. The project was intended to continue for up to three years to asses long-term changes in IAQ but the project was limited to one calendar year. As a result, several of the primary research questions related to seasonal impacts and the long-term trends in IAQ could not be addressed. In addition, there were several unexpected issues related to recruiting, availability of home types, and difficulty coordinating with builders/realtors/homeowners. Several field monitoring issues also came up that provide “lessons learned” that led to improvements to the original monitoring plan. The project produced a good experimental plan that is expected to be be useful for future efforts collecting data to support answering these same or similar research questions.

Widder, Sarah H.; Chamness, Michele A.; Petersen, Joseph M.; Singer, Brett C.; Maddalena, Randy L.; Destaillats, Hugo

2014-10-20T23:59:59.000Z

290

Miniaturized radiation chirper  

DOE Patents [OSTI]

The disclosure relates to a miniaturized radiation chirper for use with a small battery supplying on the order of 5 volts. A poor quality CdTe crystal which is not necessarily suitable for high resolution gamma ray spectroscopy is incorporated with appropriate electronics so that the chirper emits an audible noise at a rate that is proportional to radiation exposure level. The chirper is intended to serve as a personnel radiation warning device that utilizes new and novel electronics with a novel detector, a CdTe crystal. The resultant device is much smaller and has much longer battery life than existing chirpers.

Umbarger, C. John (Los Alamos, NM); Wolf, Michael A. (Los Alamos, NM)

1980-01-01T23:59:59.000Z

291

Indoor air quality bill opposed by EPA  

Science Journals Connector (OSTI)

Indoor air quality bill opposed by EPA ... Sen. George J. Mitchell (D.-Me.) has introduced a bill to protect the quality of indoor air. ... According to J. Craig Potter, assistant EPA administrator for air and radiation, the "Indoor Air Quality Act of 1987," S. 1629, is a bill whose time has not yet arrived. ...

LOIS EMBER

1987-12-07T23:59:59.000Z

292

Radiation physics, biophysics, and radiation biology. Progress report, December 1, 1992--November 30, 1993  

SciTech Connect (OSTI)

Research at the Center for Radiological Research is a multidisciplenary blend of physics, chemistry and biology aimed at understanding the mechanisms involved in the health problems resulting from human exposure to ionizing radiations. The focus is increased on biochemistry and the application of the techniques of molecular biology to the problems of radiation biology. Research highlights of the program from the past year are described. A mathematical model describing the production of single-strand and double-strand breaks in DNA as a function radiation quality has been completed. For the first time Monte Carlo techniques have been used to obtain directly the spatial distribution of DNA moieties altered by radiation. This information was obtained by including the transport codes a realistic description of the electronic structure of DNA. We have investigated structure activity relationships for the potential oncogenicity of a new generation of bioreductive drugs that function as hypoxic cytotoxins. Experimental and theoretical investigation of the inverse dose rate effect, whereby medium LET radiations actually produce an c effect when the dose is protracted, is now at a point where the basic mechanisms are reasonably understood and the complex interplay between dose, dose rate and radiation quality which is necessary for the effect to be present can now be predicted at least in vitro. In terms of early radiobiological damage, a quantitative link has been established between basic energy deposition and locally multiply damaged sites, the radiochemical precursor of DNA double strand breaks; specifically, the spatial and energy deposition requirements necessary to form LMDs have been evaluated. For the first time, a mechanically understood ``biological fingerprint`` of high-LET radiation has been established. Specifically measurement of the ratio of inter-to intra-chromosomal aberrations produces a unique signature from alpha-particles or neutrons.

Hall, E.J.; Zaider, M.

1993-05-01T23:59:59.000Z

293

The Development and Validation of a Pre-Evaluation Instrument for the Virtual College of Texas to Measure Quality in Distance Education Courses  

E-Print Network [OSTI]

of one pre-evaluation instrument to control consistency of the quality standards. 12 The significance of this study can also begin to forge the ground for an acceptance of standard criteria for quality for the development of future distance... for the advancement and acceptance of accredited on-line degrees. Moreover, it could promote the value of 13 connecting with human beings in a meaningful way through the use of quality distance education for educational human resource development (Swanson...

Claus, Edna Q.

2010-07-14T23:59:59.000Z

294

Low Dose Radiation Program: Links - Agencies with Radiation Regulatory  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Agencies with Radiation Regulatory Concerns and Involvement Agencies with Radiation Regulatory Concerns and Involvement Biological Effects of Low Level Exposures (BELLE) Canadian Nuclear Safety Commission Center for Risk Excellence Health Protection Agency The Health Risks of Extraterrestrial Environments International Commission on Radiation Units and Measurements, Inc. International Commission on Radiological Protection (ICRP) International Radiation Protection Association (IRPA) NASA Space Radiation Program National Academy of Sciences (NAS) Nuclear and Radiation Studies Board National Aeronautics and Space Administration (NASA) NASA OBRR Task Book Publication National Council on Radiation Protection (NCRP) National Institute of Environmental Health Sciences (NIEHS) National Toxicology Program (NTP) Occupational Safety and Health Administration (OSHA)

295

Atmospheric Radiation Measurement (ARM) Data from Shouxian, China for the Study of Aerosol Indirect Effects in China  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

In a complex ARM Mobile Facility (AMF) deployment, monitoring data was collected at four locations in China during 2008. The various sites are located in regions with different climate regimes and with high aerosol loadings of different optical, physical, and chemical properties. Measurements obtained at all the AMF sites during the 8-month deployment in China will help scientists to validate satellite-based findings, understand the mechanisms of the aerosol indirect effects in the region, and examine the roles of aerosols in affecting regional climate and atmospheric circulation, with a special focus on the impact of the East Asian monsoon system. As with other collections from the ARM Mobile Facility, the datasets are available from the ARM Archive. The ARM Archive physically resides at the Oak Ridge National Laboratory.

296

Quality Manual-sample  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Q-001 Quality Manual 11_0329 Page 1 of 33 Q-001 Quality Manual 11_0329 Page 1 of 33 EOTA - Quality Manual Document Title: Quality Manual Document Number: Q-001 Rev. 11_0329 Document Owner: Elizabeth Sousa Backup Owner: Melissa Otero Approver(s): Melissa Otero Parent Document: N/A Notify of Changes: EOTA Employees Referenced Document(s): Various Q-001 Quality Manual 11_0329 Page 2 of 33 Revision History: Rev. Level Description of Change A Initial Release B Section V - added justification for exclusion "....because EOTA does not require the use of monitoring and measurement devices in the conduct of business." 07_1205 Added MGTP-004, Employee Satisfaction to Quality Manual 08_0818 Changed P-008 from Corrective Action and Preventive Action to read Corrective/Preventive Action & Improvement Opportunity

297

Radiation: Radiation Control (Indiana)  

Broader source: Energy.gov [DOE]

It is the policy of the state to encourage the constructive uses of radiation and to control its harmful effects. This section contains regulations pertaining to the manufacture, use,...

298

Ionizing radiation dosimetry in the absorbed dose range 0.01–50 \\{MGy\\} based on resistance and ESR linewidth measurements of organic conducting crystals  

Science Journals Connector (OSTI)

The materials studied in the present work as high-dose dosimeters are members of a large class of molecular crystals which are organic conductors of electricity. Very different from each other in the details of their molecular and crystal structures, they all behave in the same way when subjected to increasing high doses of radiation, at least from the point of view of their electronic transport properties, because of the quasi-one-dimensional character of the conduction process. Their resistivities increase exponentially with the absorbed dose while their electron spin resonance (ESR) linewidths decrease exponentially. Very small single crystals less than 10 ?m thick can be used as dosimeters in the dose range 0.01–50 \\{MGy\\} for ? rays as well as for electron irradiations, by applying four probe resistance measurements. Only a few compounds over a large number of candidates have been irradiated in the present work with ?-rays, low energy x-rays and electrons. In some favourable cases the energy and temperature dependences of the dosimeters have been checked experimentally. Their mass energy absorption coefficients and electron stopping powers have been also calculated. It is hoped to extend this kind of dosimetry to lower and higher doses by trying new compounds from the large family of organic conductors or by improving the resistivity and ESR measurement techniques.

L. Zuppiroli; S. Bouffard; J.J. Jacob

1985-01-01T23:59:59.000Z

299

Radiation source rate estimation through data assimilation of gamma dose rate measurements for operational nuclear emergency response systems  

Science Journals Connector (OSTI)

This paper presents an evaluation of an innovative data assimilation method that has been recently developed in NCSR Demokritos for estimating an unknown emission rate of radionuclides in the atmosphere, with real-scale experimental data. The efficient algorithm is based on the assimilation of gamma dose rate measured data in the Lagrangian atmospheric dispersion model DIPCOT and uses variational principles. The DIPCOT model is used in the framework of the nuclear emergency response system (ERS) RODOS. The evaluation is performed by computational simulations of dispersion of Ar-41 that was emitted routinely by the Australian Nuclear Science and Technology Organisation's (ANSTO) previous research reactor, HIFAR, located in Sydney, Australia. In this paper the algorithm is evaluated against a more complicated case than the others used in previous studies: there was only one monitoring station available each day and the site topography is characterised as moderately complex. Overall the estimated release rate approaches the real one to a very satisfactory degree as revealed by the statistical indicators of errors.

Vasiliki Tsiouri; Spyros Andronopoulos; Ivan Kovalets; Leisa L. Dyer; John G. Bartzis

2012-01-01T23:59:59.000Z

300

ARM - Measurement - Aerosol absorption  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption absorption ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Aerosol absorption The process in which radiation energy is retained by aerosols. Categories Aerosols Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments AOS : Aerosol Observing System CSPHOT : Cimel Sunphotometer IAP : In-situ Aerosol Profiles (Cessna Aerosol Flights) PSAP : Particle Soot Absorption Photometer PASS : Photoacoustic Soot Spectrometer External Instruments OMI : Ozone Monitoring Instrument

Note: This page contains sample records for the topic "radiation measurement quality" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

ARM - Measurement - Surface albedo  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

albedo albedo ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Surface albedo The fraction of incoming solar radiation at a surface (i.e. land, cloud top) that is effectively reflected by that surface. Categories Surface Properties Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments MFR : Multifilter Radiometer External Instruments ETA : Eta Model Runs ECMWFDIAG : European Centre for Medium Range Weather Forecasts Diagnostic Analyses ECMWF : European Centre for Medium Range Weather Forecasts Model

302

Radiation safety system  

Science Journals Connector (OSTI)

......occupational illness to personnel, major damage...acceptable levels. Selection of control measures...or equipment operating correctly in...99 103 to 104 Personnel life safety...and abnormal operating conditions under...radiation risk to personnel, public and...worker radiation training) reduces the......

Vaclav Vylet; James C. Liu; Lawrence S. Walker

2009-11-01T23:59:59.000Z

303

Acoustic quality factor and energy losses in cylindrical pipes  

Science Journals Connector (OSTI)

The quality factor Q of a damped oscillator equals 2? times the ratio of stored energy to the energy dissipated per cycle. This makes Q a sensitive probe of energy losses. Using modest equipment we measured the acoustical Q for a set of cylindrical pipes having the same resonant frequency but different diameters D. The graph of Q vs D could be well fitted with two parameters one of which corresponds to energy loss via radiation from the ends of the pipe and the other to thermal and viscous losses very close to the pipe wall. The wall loss parameter was quite constant no matter where the pipes were located but the radiative loss parameter varied significantly with location inside a room suggesting that room reflections affected the sound radiated from the pipe. This study offers valuable insights at no great expense and could be the basis of an upper-division undergraduatelaboratory experiment.

Michael J. Moloney; Daniel L. Hatten

2001-01-01T23:59:59.000Z

304

Analyst Tools and Quality Control Software for the ARM Data System  

SciTech Connect (OSTI)

ATK Mission Research develops analyst tools and automated quality control software in order to assist the Atmospheric Radiation Measurement (ARM) Data Quality Office with their data inspection tasks. We have developed a web-based data analysis and visualization tool, called NCVweb, that allows for easy viewing of ARM NetCDF files. NCVweb, along with our library of sharable Interactive Data Language procedures and functions, allows even novice ARM researchers to be productive with ARM data with only minimal effort. We also contribute to the ARM Data Quality Office by analyzing ARM data streams, developing new quality control metrics, new diagnostic plots, and integrating this information into DQ HandS - the Data Quality Health and Status web-based explorer. We have developed several ways to detect outliers in ARM data streams and have written software to run in an automated fashion to flag these outliers.

Moore, S.T.

2004-12-14T23:59:59.000Z

305

OPERATIONAL GUIDANCE FOR RADIATION EMERGENCY RESPONSE ORGANISATIONS IN EUROPE FOR USING BIODOSIMETRIC TOOLS DEVELOPED IN EU MULTIBIODOSE PROJECT  

Science Journals Connector (OSTI)

......Radiation Surveillance, Radiation and Nuclear Safety Authority, Helsinki...for most low-LET radiation qualities. THE MULTIBIODOSE SOFTWARE The Guidance briefly...K. Multibiodose Radiation Emergency Triage Categorization Software. Health Phys......

Alicja Jaworska; Elizabeth A. Ainsbury; Paola Fattibene; Carita Lindholm; Ursula Oestreicher; Kai Rothkamm; Horst Romm; Hubert Thierens; Francois Trompier; Philippe Voisin; Anne Vral; Clemens Woda; Andrzej Wojcik

2014-10-01T23:59:59.000Z

306

Quality Assurance Specialist  

Broader source: Energy.gov [DOE]

Alternate Title(s):Quality Control Technician; Quality Assurance Inspector; Quality Assurance Representative

307

Testing and Performance Validation of a Sensitive Gamma Ray Camera Designed for Radiation Detection and Decommissioning Measurements in Nuclear Facilities-13044  

SciTech Connect (OSTI)

This paper describes the measurements, testing and performance validation of a sensitive gamma ray camera designed for radiation detection and quantification in the environment and decommissioning and hold-up measurements in nuclear facilities. The instrument, which is known as RadSearch, combines a sensitive and highly collimated LaBr{sub 3} scintillation detector with an optical (video) camera with controllable zoom and focus and a laser range finder in one detector head. The LaBr{sub 3} detector has a typical energy resolution of between 2.5% and 3% at the 662 keV energy of Cs-137 compared to that of NaI detectors with a resolution of typically 7% to 8% at the same energy. At this energy the tungsten shielding of the detector provides a shielding ratio of greater than 900:1 in the forward direction and 100:1 on the sides and from the rear. The detector head is mounted on a pan/tile mechanism with a range of motion of ±180 degrees (pan) and ±90 degrees (tilt) equivalent to 4 ? steradians. The detector head with pan/tilt is normally mounted on a tripod or wheeled cart. It can also be mounted on vehicles or a mobile robot for access to high dose-rate areas and areas with high levels of contamination. Ethernet connects RadSearch to a ruggedized notebook computer from which it is operated and controlled. Power can be supplied either as 24-volts DC from a battery or as 50 volts DC supplied by a small mains (110 or 230 VAC) power supply unit that is co-located with the controlling notebook computer. In this latter case both power and Ethernet are supplied through a single cable that can be up to 80 metres in length. If a local battery supplies power, the unit can be controlled through wireless Ethernet. Both manual operation and automatic scanning of surfaces and objects is available through the software interface on the notebook computer. For each scan element making up a part of an overall scanned area, the unit measures a gamma ray spectrum. Multiple radionuclides may be selected by the operator and will be identified if present. In scanning operation the unit scans a designated region and superimposes over a video image the distribution of measured radioactivity. For the total scanned area or object RadSearch determines the total activity of operator selected radionuclides present and the gamma dose-rate measured at the detector head. Results of hold-up measurements made in a nuclear facility are presented, as are test measurements of point sources distributed arbitrarily on surfaces. These latter results are compared with the results of benchmarked MCNP Monte Carlo calculations. The use of the device for hold-up and decommissioning measurements is validated. (authors)

Mason, John A.; Looman, Marc R.; Poundall, Adam J.; Towner, Antony C.N. [ANTECH, A. N. Technology Ltd., Unit 6, Thames Park, Wallingford, Oxfordshire, OX10 9TA (United Kingdom)] [ANTECH, A. N. Technology Ltd., Unit 6, Thames Park, Wallingford, Oxfordshire, OX10 9TA (United Kingdom); Creed, Richard; Pancake, Daniel [Argonne National Laboratory, 9700 South Cass Avenue, Lemont, IL 60439 (United States)] [Argonne National Laboratory, 9700 South Cass Avenue, Lemont, IL 60439 (United States)

2013-07-01T23:59:59.000Z

308

Use of the ARM Measurement of Spectral Zenith Radiance For Better Understanding Of 3D Cloud-Radiation Processes and Aerosol-Cloud Interaction  

SciTech Connect (OSTI)

Our proposal focuses on cloud-radiation processes in a general 3D cloud situation, with particular emphasis on cloud optical depth and effective particle size. We also focus on zenith radiance measurements, both active and passive. The proposal has three main parts. Part One exploits the �¢����solar-background�¢��� mode of ARM lidars to allow them to retrieve cloud optical depth not just for thin clouds but for all clouds. This also enables the study of aerosol cloud interactions with a single instrument. Part Two exploits the large number of new wavelengths offered by ARM�¢����s zenith-pointing ShortWave Spectrometer (SWS), especially during CLASIC, to develop better retrievals not only of cloud optical depth but also of cloud particle size. We also propose to take advantage of the SWS�¢���� 1 Hz sampling to study the �¢����twilight zone�¢��� around clouds where strong aerosol-cloud interactions are taking place. Part Three involves continuing our cloud optical depth and cloud fraction retrieval research with ARM�¢����s 2NFOV instrument by, first, analyzing its data from the AMF-COPS/CLOWD deployment, and second, making our algorithms part of ARM�¢����s operational data processing.

D. Jui-Yuan Chiu

2010-10-19T23:59:59.000Z

309

Low Dose Radiation Program: Links - Organizations Conducting Radiation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Conducting Low Dose Radiation Research Conducting Low Dose Radiation Research DOE Low Dose Radiation Research Program DoReMi Integrating Low Dose Research High Level Expert Group (HLEG) on European Low Dose Risk Research Multidisciplinary European Low Dose Initiative (MELODI) RISC-RAD Radiosensitivity of Individuals and Susceptibility to Cancer induced by Ionizing Radiation United States Transuranium & Uranium Registries Organizations Conducting other Radiation Research Argonne National Laboratory (ANL) Armed Forces Radiology Research Institute (AFRRI) Atmospheric Radiation Measurement (ARM) Program Brookhaven National Laboratory (BNL) Center for Devices and Radiological Health (CDRH) Central Research Institute of Electric Power Industry (CRIEPI) Colorado State University Columbia University

310

Chapter 1.12: Solar Radiation Resource Assessment for Renewable Energy Conversion  

SciTech Connect (OSTI)

This chapter addresses measurements, modeling, and databases of solar energy potential that may serve as fuel for solar energy conversion systems. Developing innovative designs for capturing and converting solar radiation is only one part of the equation for solar system deployment. Identifying, locating, and prospecting for the appropriate quantity and quality of solar resources to fuel these systems is critical to system designers, investors, financial backers, utilities, governments, and owner/operators. This chapter addresses the fundamentals and state of the art for measuring, modeling, and applying solar radiation resource data to meet decision-making needs.

Myers, D. R.

2012-01-01T23:59:59.000Z

311

1.12 - Solar Radiation Resource Assessment for Renewable Energy Conversion  

Science Journals Connector (OSTI)

Abstract This chapter addresses measurements, modeling, and databases of solar energy potential that may serve as fuel for solar energy conversion systems. Developing innovative designs for capturing and converting solar radiation is only one part of the equation for solar system deployment. Identifying, locating, and prospecting for the appropriate quantity and quality of solar resources to fuel these systems is critical to system designers, investors, financial backers, utilities, governments, and owner/operators. This chapter addresses the fundamentals and state of the art for measuring, modeling, and applying solar radiation resource data to meet decision-making needs.

D.R. Myers

2012-01-01T23:59:59.000Z

312

Comparison of Data Quality of NOAA's ISIS and SURFRAD Networks to NREL's SRRL-BMS  

SciTech Connect (OSTI)

This report provides analyses of broadband solar radiometric data quality for the National Oceanic and Atmospheric Administration's Integrated Surface Irradiance Study and Surface Radiation Budget Network (SURFRAD) solar measurement networks. The data quality of these networks is compared to that of the National Renewable Energy Laboratory's Solar Radiation Research Laboratory Baseline Measurement System (SRRL-BMS) native data resolutions and hourly averages of the data from the years 2002 through 2013. This report describes the solar radiometric data quality testing and flagging procedures and the method used to determine and tabulate data quality statistics. Monthly data quality statistics for each network were plotted by year against the statistics for the SRRL-BMS. Some of the plots are presented in the body of the report, but most are in the appendix. These plots indicate that the overall solar radiometric data quality of the SURFRAD network is superior to that of the Integrated Surface Irradiance Study network and can be comparable to SRRL-BMS.

Anderberg, M.; Sengupta, M.

2014-11-01T23:59:59.000Z

313

ARM - Measurement - Longwave narrowband brightness temperature  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

narrowband brightness temperature narrowband brightness temperature ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Longwave narrowband brightness temperature A descriptive measure of radiation in terms of the temperature of a hypothetical black body emitting an identical amount of radiation in the same narrow band of wavelengths. Categories Radiometric Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments IRT : Infrared Thermometer Field Campaign Instruments RAD-AIR : Airborne Radiometers

314

Use of EORTC Target Definition Guidelines for Dose-Intensified Salvage Radiation Therapy for Recurrent Prostate Cancer: Results of the Quality Assurance Program of the Randomized Trial SAKK 09/10  

SciTech Connect (OSTI)

Purpose: Different international target volume delineation guidelines exist and different treatment techniques are available for salvage radiation therapy (RT) for recurrent prostate cancer, but less is known regarding their respective applicability in clinical practice. Methods and Materials: A randomized phase III trial testing 64 Gy vs 70 Gy salvage RT was accompanied by an intense quality assurance program including a site-specific and study-specific questionnaire and a dummy run (DR). Target volume delineation was performed according to the European Organisation for the Research and Treatment of Cancer guidelines, and a DR-based treatment plan was established for 70 Gy. Major and minor protocol deviations were noted, interobserver agreement of delineated target contours was assessed, and dose-volume histogram (DVH) parameters of different treatment techniques were compared. Results: Thirty European centers participated, 43% of which were using 3-dimensional conformal RT (3D-CRT), with the remaining centers using intensity modulated RT (IMRT) or volumetric modulated arc technique (VMAT). The first submitted version of the DR contained major deviations in 21 of 30 (70%) centers, mostly caused by inappropriately defined or lack of prostate bed (PB). All but 5 centers completed the DR successfully with their second submitted version. The interobserver agreement of the PB was moderate and was improved by the DR review, as indicated by an increased ? value (0.59 vs 0.55), mean sensitivity (0.64 vs 0.58), volume of total agreement (3.9 vs 3.3 cm{sup 3}), and decrease in the union volume (79.3 vs 84.2 cm{sup 3}). Rectal and bladder wall DVH parameters of IMRT and VMAT vs 3D-CRT plans were not significantly different. Conclusions: The interobserver agreement of PB delineation was moderate but was improved by the DR. Major deviations could be identified for the majority of centers. The DR has improved the acquaintance of the participating centers with the trial protocol.

Sassowsky, Manfred [Department of Radiation Oncology and Division of Medical Radiation Physics, Bern University Hospital (Switzerland); Gut, Philipp [Department of Radiation Oncology Kantonsspital Luzern (Switzerland); Hölscher, Tobias [University Hospital Dresden (Germany); Hildebrandt, Guido [University Hospital Rostock (Germany); Müller, Arndt-Christian [University Hospital Tübingen (Germany); Najafi, Yousef [University Hospital Zürich (Switzerland); Kohler, Götz [University Hospital Basel (Switzerland); Kranzbühler, Helmut [Stadtspital Triemli, Zürich (Switzerland); Guckenberger, Matthias [University Hospital Würzburg (Germany); Zwahlen, Daniel R. [Kantonsspital Graubünden, Chur (Switzerland); Azinwi, Ngwa C. [Istituto Oncologico della Svizzera Italiana, Bellinzona (Switzerland); Plasswilm, Ludwig [Kantonsspital St. Gallen (Switzerland); Takacs, Istvan [Kantonsspital Aarau (Switzerland); Reuter, Christiane [Kantonsspital Münsterlingen (Switzerland); Sumila, Marcin [Hirslanden Hospital Group, Zürich (Switzerland); Manser, Peter [Department of Radiation Oncology and Division of Medical Radiation Physics, Bern University Hospital (Switzerland); Ost, Piet [Ghent University Hospital (Belgium); Böhmer, Dirk [Charité University Medicine, Berlin (Germany); Pilop, Christiane [Swiss Group for Clinical Cancer Research, Coordinating Center, Bern (Switzerland); Aebersold, Daniel M. [Department of Radiation Oncology and Division of Medical Radiation Physics, Bern University Hospital (Switzerland); and others

2013-11-01T23:59:59.000Z

315

Radiation Management Act (Oklahoma) | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Radiation Management Act (Oklahoma) Radiation Management Act (Oklahoma) Radiation Management Act (Oklahoma) < Back Eligibility Utility Investor-Owned Utility Program Info State Oklahoma Program Type Environmental Regulations Provider Oklahoma Department of Environmental Quality This Act establishes The Department of Environmental Quality as the designated official agency of the State of Oklahoma for all regulatory activities for the use of atomic energy and sources of radiation, except for the use of sources of radiation by diagnostic x-ray facilities. It also states rules for permits and fees related to the establishment of standards for safe levels of protection against radiation; the maintenance and submission of records; the determination, prevention and control of radiation hazards; the reporting of radiation accidents; the handling,

316

Gamma radiation field intensity meter  

DOE Patents [OSTI]

A gamma radiation intensity meter measures dose rate of a radiation field. The gamma radiation intensity meter includes a tritium battery emitting beta rays generating a current which is essentially constant. Dose rate is correlated to an amount of movement of an electroscope element charged by the tritium battery. Ionizing radiation decreases the voltage at the element and causes movement. A bleed resistor is coupled between the electroscope support element or electrode and the ionization chamber wall electrode. 4 figs.

Thacker, L.H.

1995-10-17T23:59:59.000Z

317

Gamma radiation field intensity meter  

DOE Patents [OSTI]

A gamma radiation intensity meter measures dose rate of a radiation field. The gamma radiation intensity meter includes a tritium battery emitting beta rays generating a current which is essentially constant. Dose rate is correlated to an amount of movement of an electroscope element charged by the tritium battery. Ionizing radiation decreases the voltage at the element and causes movement. A bleed resistor is coupled between the electroscope support element or electrode and the ionization chamber wall electrode. 4 figs.

Thacker, L.H.

1994-08-16T23:59:59.000Z

318

Gamma radiation field intensity meter  

DOE Patents [OSTI]

A gamma radiation intensity meter measures dose rate of a radiation field. The gamma radiation intensity meter includes a tritium battery emitting beta rays generating a current which is essentially constant. Dose rate is correlated to an amount of movement of an electroscope element charged by the tritium battery. Ionizing radiation decreases the voltage at the element and causes movement. A bleed resistor is coupled between the electroscope support element or electrode and the ionization chamber wall electrode.

Thacker, Louis H. (Knoxville, TN)

1995-01-01T23:59:59.000Z

319

Gamma radiation field intensity meter  

DOE Patents [OSTI]

A gamma radiation intensity meter measures dose rate of a radiation field. The gamma radiation intensity meter includes a tritium battery emitting beta rays generating a current which is essentially constant. Dose rate is correlated to an amount of movement of an electroscope element charged by the tritium battery. Ionizing radiation decreases the voltage at the element and causes movement. A bleed resistor is coupled between the electroscope support element or electrode and the ionization chamber wall electrode.

Thacker, Louis H. (Knoxville, TN)

1994-01-01T23:59:59.000Z

320

Radiation safety and protection in US dental hygiene programs  

SciTech Connect (OSTI)

A survey of radiation safety and protection measures used by programs teaching dental hygiene indicated some areas for concern. No barriers or radiation shieldings were used between operator and patient in four programs. Radiation monitoring devices were not worn by faculty operators in 16% of the programs. Fewer than half of the programs used thyroid shields for patients on a routine basis. Insufficient filtration for the kilovolt peak employed was used by 14% of the programs, and for 19% more the filtration was unknown or unspecified. Three programs used closed cones. Rectangular collimation was not used at all by 63% of the programs, and only 20% used E speed film routinely. Quality assurance for equipment maintenance and for film processing were in place at only 54% and 49% of the programs, respectively.

Farman, A.G.; Hunter, N.; Grammer, S.

1986-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiation measurement quality" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Progress Toward an Updated National Solar Radiation Data Base  

SciTech Connect (OSTI)

Progress is reported on an updated National Solar Radiation Database (NSRDB). Focus on this year's work was on preparing a test-year database for evaluating several solar radiation models that could be used to replace the METSTAT model used in the original 1961-1990 NSRDB. That model is no longer compatible with cloud observations reported by the National Weather Service. We have also included a satellite-based model that will increase the spatial resolution of solar radiation for GIS or mapping applications. Work also included development of improved estimates for aerosols, water vapor, and ozone. High-quality solar measurements were obtained for 33 sites near National Weather Service stations, and model runs were completed for test years 1999 and 2000.

Wilcox, S.; Anderberg, M.; George, R.; Marion, W.; Myers, D.; Renne, D.; Beckman, W.; DeGaetano, A.; Gueymard, C.; Perez, R.; Plantico, M.; Stackhouse, P.; Vignola, F.

2005-01-01T23:59:59.000Z

322

Quality Assurance  

Broader source: Energy.gov [DOE]

QUALITY ASSURANCE IN THE DEPARTMENT OF ENERGY DOE has established Quality Policy, Principles and Value Added Requirement Attributes that apply to all work and are focused on performance, customer expectations, and improvement. When properly implemented, the principles and requirements form a management system to plan, perform, assess, and improve work. The requirements are performance oriented and offer unlimited implementation flexibility.

323

About Radiation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Radiation Radiation What is radiation? Radiation is a form of energy that is a part of our everyday lives. All of us receive a "dose" of radiation each day. Most of the dose comes from naturally occurring radioactive materials such as uranium, thorium, radon, and certain forms of potassium and carbon. The air we breathe contains radon, the food we eat contains uranium and thorium from the soil, and our bodies contain radioactive forms of potassium and carbon. Cosmic radiation from the sun also contributes to our natural radiation dose. We also receive radiation doses from man-made sources such as X-rays, nuclear medical procedures, power plants, smoke detectors and older television sets. Some people, such as nuclear plant operators, flight crews, and nuclear medicine staff may also receive an occupational radiation dose.

324

Li et al., Aerosol and Air Quality Research, Vol. 6, No. 4, pp. 418-429, 2006 UV-Absorption-Based Measurements of Ozone and Mercury  

E-Print Network [OSTI]

interferences. For example, CMMs based on atomic absorption spectrometry (AAS) are subject to interferences of the Hg detection technique. Atomic absorption spectrometry (AAS) is one of the major techniques appliedLi et al., Aerosol and Air Quality Research, Vol. 6, No. 4, pp. 418-429, 2006 UV-Absorption

Li, Ying

325

ARM - Measurement - Shortwave narrowband radiance  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

narrowband radiance narrowband radiance ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Shortwave narrowband radiance A measure of the intrinsic radiant energy flux intensity, at wavelengths between 0.4 and 4 {mu}, emitted by a radiator in a given direction, expressed in units of energy per unit time per unit solid angle. Categories Radiometric Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments CSPHOT : Cimel Sunphotometer SWS : Shortwave Spectroradiometer

326

Quality Assurance of ARM Program Climate Research Facility Data  

SciTech Connect (OSTI)

This report documents key aspects of the Atmospheric Radiation Measurement (ARM) Climate Research Facility (ACRF) data quality assurance program as it existed in 2008. The performance of ACRF instruments, sites, and data systems is measured in terms of the availability, usability, and accessibility of the data to a user. First, the data must be available to users; that is, the data must be collected by instrument systems, processed, and delivered to a central repository in a timely manner. Second, the data must be usable; that is, the data must be inspected and deemed of sufficient quality for scientific research purposes, and data users must be able to readily tell where there are known problems in the data. Finally, the data must be accessible; that is, data users must be able to easily find, obtain, and work with the data from the central repository. The processes described in this report include instrument deployment and calibration; instrument and facility maintenance; data collection and processing infrastructure; data stream inspection and assessment; the roles of value-added data processing and field campaigns in specifying data quality and haracterizing the basic measurement; data archival, display, and distribution; data stream reprocessing; and engineering and operations management processes and procedures. Future directions in ACRF data quality assurance also are presented.

RA Peppler; KE Kehoe; KL Sonntag; CP Bahrmann; SJ Richardson; SW Christensen; RA McCord; DJ Doty; R Wagener; RC Eagan; JC Lijegren; BW Orr; DL Sisterson; TD Halter; NN Keck; CN Long; MC Macduff; JH Mather; RC Perez; JW Voyles; MD Ivey; ST Moore; DL Nitschke; BD Perkins; DD Turner

2008-03-01T23:59:59.000Z

327

Radiation Dose Measurement by Electron Spin Resonance Studies of Tooth Enamel in Lime and Non-lime Consuming Individuals from the Silchar Region of Northeast India  

Science Journals Connector (OSTI)

......uranium in nuclear workers occupationally exposed to uranium in Rocketdyne, USA (19501994). Apart from the known toxic effects of...radiation exposure on cancer mortality in nuclear workers at Rocketdyne/Atomics Interna- tional. Environ Health Perspect. 108......

Deborshi Bhattacharjee; Alexander I. Ivannikov; Kassym Zhumadilov; Valeriy F. Stepanenko; Kenichi Tanaka; Satoru Endo; Megu Ohtaki; Shin Toyoda; Joyeeta Bhattacharyya; Masaharu Hoshi

2009-11-01T23:59:59.000Z

328

Louisiana Nuclear Energy and Radiation Control Law (Louisiana)  

Broader source: Energy.gov [DOE]

The Louisiana Department of Environmental Quality is responsible for the regulation of nuclear energy safety, permitting and radiation safety and control in Louisiana. The Department operates...

329

A Basic Overview of the Occupational Radiation Exposure Monitoring...  

Office of Environmental Management (EM)

and accurate, and conforms to national and international performance and quality assurance standards. The DOE Radiation Exposure Monitoring Systems (REMS) program provides for...

330

Quality Policy  

Broader source: Energy.gov [DOE]

Quality Policy It is the policy of the Department of Energy to establish quality requirements to ensure that risks and environmental impacts are minimized and that safety, reliability, and performance are maximized through the application of effective management systems commensurate with the risks posed by the facility or activity and its work. The Department implements this policy through the QA Order and the QA rule directives to ensure quality assurance requirements are clearly specified for the broad spectrum of work performed by DOE and its contractors.

331

Remote Sensing and In-Situ Observations of Arctic Mixed-Phase and Cirrus Clouds Acquired During Mixed-Phase Arctic Cloud Experiment: Atmospheric Radiation Measurement Uninhabited Aerospace Vehicle Participation  

SciTech Connect (OSTI)

The Atmospheric Radiation Monitor (ARM) uninhabited aerospace vehicle (UAV) program aims to develop measurement techniques and instruments suitable for a new class of high altitude, long endurance UAVs while supporting the climate community with valuable data sets. Using the Scaled Composites Proteus aircraft, ARM UAV participated in Mixed-Phase Arctic Cloud Experiment (M-PACE), obtaining unique data to help understand the interaction of clouds with solar and infrared radiation. Many measurements obtained using the Proteus were coincident with in-situ observations made by the UND Citation. Data from M-PACE are needed to understand interactions between clouds, the atmosphere and ocean in the Arctic, critical interactions given large-scale models suggest enhanced warming compared to lower latitudes is occurring.

McFarquhar, G.M.; Freer, M.; Um, J.; McCoy, R.; Bolton, W.

2005-03-18T23:59:59.000Z

332

Danger radiations  

ScienceCinema (OSTI)

Le conférencier Mons.Hofert parle des dangers et risques des radiations, le contrôle des zones et les précautions ŕ prendre ( p.ex. film badge), comment mesurer les radiations etc.

None

2011-04-25T23:59:59.000Z

333

ARM - Measurement - Shortwave broadband diffuse downwelling irradiance  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

diffuse downwelling irradiance diffuse downwelling irradiance ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Shortwave broadband diffuse downwelling irradiance All of the solar radiation, across the wavelength range of 0.4 and 4 {mu}m, coming directly from the sky except for solar radiation coming directly from the sun and the circumsolar irradiance within approximately three degrees of the sun. Categories Radiometric Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments

334

Air Quality  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

What We Monitor & Why » What We Monitor & Why » Air Quality Air Quality To preserve our existing wilderness-area air quality, LANL implements a conscientious program of air monitoring. April 12, 2012 Real-time data monitoring for particulate matter An air monitoring field team member tests one of LANL's tapered element oscillating microbalance samplers, which collects real-time particulate matter data. Contact Environmental Communication & Public Involvement P.O. Box 1663 MS M996 Los Alamos, NM 87545 (505) 667-0216 Email LANL monitors air quality 24 hours a day, 365 days a year. Why we monitor air LANL monitors many different pathways in order to assess their impact on workers, the public, animals, and plants. We monitor the air around the Laboratory to ensure our operations are not affecting the air of nearby

335

Quality Assurance  

Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

To establish an effective management system [i.e., quality assurance programs (QAPs)] using the performance requirements of this Order, coupled with technical standards where appropriate. Cancels DOE O 414.1.

1999-09-29T23:59:59.000Z

336

Quality Assurance  

Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

The Order defines roles and responsibilities for providing quality assurance for DOE products and services. Cancels DOE O 414.1C. Admin Chg 1, dated 5-8-13, cancels DOE O 414.1D.

2011-04-25T23:59:59.000Z

337

Quality Assurance  

Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

This Order ensures that the quality of DOE/NNSA products and services meets or exceeds the customers' expectations. Cancels DOE O 414.1B and DOE N 411.1. Canceled by DOE O 414.1D.

2005-06-17T23:59:59.000Z

338

New indicator approaches for effective urban air quality management  

Science Journals Connector (OSTI)

Measurements of urban air quality at monitoring stations in developed countries have frequently involved the criteria gaseous pollutants, particulates, hazardous air pollutants, perceived air quality and relev...

Peter J. Peterson; W. Peter Williams

1999-12-01T23:59:59.000Z

339

Marketing Quality Energy Awareness  

E-Print Network [OSTI]

: Production Units Electricity Chilled Water Steam Compressed Air Water Fig. 2. Measurement, Monitoring &Reporting Cost savings resulted when Business Unit 0 forecasted a $30,OOO/month drop in energy costs due to production line changes and actual... within process limits. They produced the same quality and quantity of product. Measurements revealed Unit 1 operated within the energy requirements, Unit 2 was above the acceptabl range and Unit 3 was under the requirements. Standards were reviewed...

Fortier, L. J.

340

Historically Black Colleges and Universities (HBCU) Solar Radiation Monitoring Network  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

The Historically Black Colleges and Universities (HBCU) Solar Radiation Monitoring Network operated from November 1985 through December 1996. The six-station network provided 5-minute averaged measurements of global and diffuse horizontal solar irradiance. The data were processed at the National Renewable Energy Laboratory (NREL) to improve the assessment of the solar radiation resources in the southeastern United States. Three of the stations also measured the direct-normal solar irradiance with a pyrheliometer mounted in an automatic sun tracker. All data are archived in the Standard Broadband Format (SBF) with quality-assessment indicators. Monthly data summaries and plots are also available for each month. In January 1997 the HBCU sites became part of the CONFRRM solar monitoring network.

Note: This page contains sample records for the topic "radiation measurement quality" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

ARM - Measurement - Longwave spectral radiance  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

spectral radiance spectral radiance ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Longwave spectral radiance The rate at which the spectrally resolved radiant energy in the longwave portion of the spectrum is emitted in a particular direction per unit area perpendicular to the direction of radiation. Categories Radiometric Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments AERI : Atmospheric Emitted Radiance Interferometer ASSIST : Atmospheric Sounder Spectrometer for Infrared Spectral

342

Radiation physics, biophysics, and radiation biology  

SciTech Connect (OSTI)

The following research programs from the Center for Radiological Research of Columbia University are described: Design and development of a new wall-less ultra miniature proportional counter for nanodosimetry; some recent measurements of ionization distributions for heavy ions at nanometer site sizes with a wall-less proportional counter; a calculation of exciton energies in periodic systems with helical symmetry: application to a hydrogen fluoride chain; electron energy-loss function in polynucleotide and the question of plasmon excitation; a non-parametric, microdosimetric-based approach to the evaluation of the biological effects of low doses of ionizing radiation; high-LET radiation risk assessment at medium doses; high-LET radiobiological effects: increased lesion severity or increased lesion proximity; photoneutrons generated by high energy medical linacs; the biological effectiveness of neutrons; implications for radiation protection; molecular characterization of oncogenes induced by neutrons; and the inverse dose-rate effect for oncogenic transformation by charged particles is LET dependent.

Hall, E.J.

1992-05-01T23:59:59.000Z

343

The Degradation of Solid Polymethylmethacrylate by Ionizing Radiation  

Science Journals Connector (OSTI)

...Polymethylmethacrylate by Ionizing Radiation P. Alexander A. Charlesby...inversely proportional to the radiation dose (plus a small quantity of...of measuring high-energy radiation doses in the range of about 1 million rontgens...

1954-01-01T23:59:59.000Z

344

Quality Assurance: Underlying Quality Principles  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Underlying Quality Principles Underlying Quality Principles These principles are consistent with Integrated Safety Management Policy, P 450.4A and support ISM implementation. Define Policies and Objectives--Ensure they are Understood and Accepted. Management must set expectations for the organization as a whole before employees can do their jobs, satisfy their customers, and strive to improve the quality of their work. This is accomplished by developing and implementing specific policies and objectives that reflect the operating philosophy of the facility's management. Once these policies and objectives have been established, all managers must take the necessary actions to ensure that each employee shares their vision of the organization's purpose. Specify Roles and Responsibilities--Ensure they are Understood and Accepted.

345

ARM - Measurement - Shortwave broadband total upwelling irradiance  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Flights) MFR : Multifilter Radiometer MFRIRT : Multifilter Radiometer and Infrared Thermometer RAD : Radiation Measurements at AMF SIRS : Solar and Infrared Radiation Station...

346

ARM - Measurement - Net broadband total irradiance  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

govMeasurementsNet broadband total irradiance govMeasurementsNet broadband total irradiance ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Net broadband total irradiance The difference between upwelling and downwelling, covering longwave and shortwave radiation. Categories Radiometric Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments EBBR : Energy Balance Bowen Ratio Station SEBS : Surface Energy Balance System External Instruments ECMWF : European Centre for Medium Range Weather Forecasts Model

347

Plasma Radiation  

Science Journals Connector (OSTI)

... JUST over ten years ago the first book on plasma physics as a subject in its own right appeared; in a gradually swelling stream ... been surprisingly few monographs. One topic which has had scant coverage in any form is plasma radiation (except for spectral-line radiation which has been dealt with very fully in ...

T. J. M. BOYD

1967-07-01T23:59:59.000Z

348

Regulations for Air Quality (Quebec, Canada)  

Broader source: Energy.gov [DOE]

This Regulation establishes emission standards for particulates and gases, emission opacity standards, standards of air quality and control measures to prevent, eliminate or reduce the emission of...

349

113 air quality control station [n  

Science Journals Connector (OSTI)

envir. (Facility for measurement of air pollution; ? air quality network/system );s estación [f] de medición de la calidad del aire (? red de ev...

2010-01-01T23:59:59.000Z

350

Quality Assurance  

Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

To establish an effective management system [i.e., quality assurance programs(QAPs)] using the performance requirements of this Order, coupled with technical standards where appropriate. Change 1, dated 7/12/01, facilitates the Department's organizational transition necessitated by establishment of the NNSA. (Attachment 2 of this Order is canceled by DOE O 470.2B.) Cancels: DOE O 414.1

2001-07-12T23:59:59.000Z

351

Assessment of the occupational radiation exposure doses to workers at INMOL Pakistan (2007–11)  

Science Journals Connector (OSTI)

......measures and safety of workers during...been sent to the Radiation Dosimetry Laboratory...fabricated computer software . The calibration...PNRA and IAEA radiation protection and safety guidelines...radiation and for the safety of radiation sources. (1994......

Khalid Masood; Junaid Zafar; Tasneem Zafar; Haroon Zafar

2013-06-01T23:59:59.000Z

352

RADIATION ALERT User Manual  

E-Print Network [OSTI]

not contaminate the Inspector by touching it to radioactive surfaces or materials. If contamination is suspected Environmental Area Monitoring 16 Checking for Surface Contamination 16 5 Maintenance 17 Calibration 17, and x-ray radiation. Its applications include: · Detecting and measuring surface contamination

Haller, Gary L.

353

Photoionization of Sc2+ ions by synchrotron radiation: Highresolution measurements and absolute cross sections in the photon energyrange 23-68 eV  

SciTech Connect (OSTI)

Cross sections for photoionization of doubly-chargedscandium ions has been measured using a merged-beams technique. Resultsare compared with the time-reversed process ofphotorecombination.

Stefan.E.Schippers@strz.uni-giessen.de

2002-10-07T23:59:59.000Z

354

Chronic Low Dose Radiation Effects on Radiation Sensitivity  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Chronic Low Dose Radiation Effects on Radiation Sensitivity Chronic Low Dose Radiation Effects on Radiation Sensitivity and Chromosome Instability Induction in TK6 Cells Schwartz J.L. 1 , Jordan R. 1 , Slovic J. 1 , Moruzzi A. 1 , Kimmel R. 2 , and Liber, H.L. 3 1 University of Washington, Seattle, WA; 2 Fred Hutchinson Cancer Research Center, Seattle, WA; 3 Colorado State University, Fort Collins, Colorado There are a number of cell responses that can be detected after low dose radiation exposures including the adaptive response, low dose hypersensitivity, and induced genomic instability. The relationship between these different phenomena is unknown. In this study, we measured adaptive responses, low dose hypersensitivity, and induced genomic instability in a human B-lymphoblastoid cell model, TK6, where we could genetically modify radiation responses by either over-expression of BCL-2 or deletion of TP53. TK6

355

Radiation dosimeter  

DOE Patents [OSTI]

A radiation detector readout circuit is provided which produces a radiation dose-rate readout from a detector even though the detector output may be highly energy dependent. A linear charge amplifier including an output charge pump circuit amplifies the charge signal pulses from the detector and pumps the charge into a charge storage capacitor. The discharge rate of the capacitor through a resistor is controlled to provide a time-dependent voltage which when integrated provides an output proportional to the dose-rate of radiation detected by the detector. This output may be converted to digital form for readout on a digital display.

Fox, Richard J. (Oak Ridge, TN)

1983-01-01T23:59:59.000Z

356

Radiation dosimeter  

DOE Patents [OSTI]

A radiation detector readout circuit is provided which produces a radiation dose-rate readout from a detector even through the detector output may be highly energy dependent. A linear charge amplifier including an output charge pump circuit amplifies the charge signal pulses from the detector and pumps the charge into a charge storage capacitor. The discharge rate of the capacitor through a resistor is controlled to provide a time-dependent voltage which when integrated provides an output proportional to the dose-rate of radiation detected by the detector. This output may be converted to digital form for readout on a digital display.

Fox, R.J.

1981-09-01T23:59:59.000Z

357

Solar and Infrared Radiation Station (SIRS) Handbook  

SciTech Connect (OSTI)

The Solar Infrared Radiation Station (SIRS) provides continuous measurements of broadband shortwave (solar) and longwave (atmospheric or infrared) irradiances for downwelling and upwelling components. The following six irradiance measurements are collected from a network of stations to help determine the total radiative flux exchange within the Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) Climate Research Facility: • Direct normal shortwave (solar beam) • Diffuse horizontal shortwave (sky) • Global horizontal shortwave (total hemispheric) • Upwelling shortwave (reflected) • Downwelling longwave (atmospheric infrared) • Upwelling longwave (surface infrared)

Stoffel, T

2005-07-01T23:59:59.000Z

358

Influence of Extraterrestrial Radiation on Radiation Portal Monitors  

SciTech Connect (OSTI)

Cosmic radiation and solar flares can be a major source of background radiation at the Earth’s surface. This paper examines the relationship between extraterrestrial radiation and the detectable background in radiation portal monitors used for homeland security applications. Background radiation data from 13 radiation portal monitor facilities are examined and compared against external sources of data related to extraterrestrial radiation, including measurements at neutron monitors located at 53 cosmic-ray observatories around the Earth, four polar orbiting satellites, three geostationary satellites, ground-based geomagnetic field data from observatories around the Earth, a solar magnetic index, solar radio flux data, and sunspot activity data. Four-years (January 2003 through December 2006) of data are used in this study, which include the latter part of Solar Cycle 23 as solar activity was on the decline. The analysis shows a significant relationship between some extraterrestrial radiation and the background detected in the radiation portal monitors. A demonstrable decline is shown in the average gamma ray and neutron background at the radiation portal monitors as solar activity declined over the period of the study.

Keller, Paul E.; Kouzes, Richard T.

2009-06-01T23:59:59.000Z

359

Radiation transport in inhomogeneous media  

SciTech Connect (OSTI)

Calculations of radiation transport in heated materials are greatly complicated by the presence of regions in which two or more materials are inhomogeneously mixed. This phenomenon is important in many systems, such as astrophysical systems where density clumps can be found in star-forming regions and molecular clouds. Laboratory experiments have been designed to test the modeling of radiation transport through inhomogeneous plasmas. A laser-heated hohlraum is used as a thermal source to drive radiation through polymer foam containing randomly distributed gold particles. Experimental measurements of radiation transport in foams with gold particle sizes ranging from 5-9 {mu}m to submicrometer diameters as well as the homogeneous foam case are presented. The simulation results of the radiation transport are compared to the experiment and show that an inhomogeneous transport model must be applied to explain radiation transport in foams loaded with 5 {mu}m diameter gold particles.

Keiter, Paul; Gunderson, Mark [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Foster, John; Rosen, Paula; Comley, Andrew; Taylor, Mark [AWE Aldermaston, Reading, RG7 4PR (United Kingdom); Perry, Ted [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)

2008-05-15T23:59:59.000Z

360

Data Driven Quality Assurance and Quality Control  

Broader source: Energy.gov [DOE]

"Data Driven Quality Assurance & Quality Control," Patrick Roche, Conservation Services Group. Provides an overview of data QA/QC system design.

Note: This page contains sample records for the topic "radiation measurement quality" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Ion Beams - Radiation Effects Facility / Cyclotron Institute...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Ion Beams Available Beams Beam Change Times Measurements Useful Graphs Various ion beams have been developed specifically for the Radiation Effects Facility. These beams...

362

The $\\epem\\to?^+?^-?^+?^-$, $K^+K^-?^+?^-$, and $K^+K^- K^+K^- $ Cross Sections at Center-of-Mass Energies 0.5--4.5 \\gev Measured with Initial-State Radiation  

E-Print Network [OSTI]

We study the process $e^+e^-\\to\\pi^+\\pi^-\\pi^+\\pi^-\\gamma$, with a hard photon radiated from the initial state. About 60,000 fully reconstructed events have been selected from 89 $fb^{-1}$ of BaBar data. The invariant mass of the hadronic final state defines the effective \\epem center-of-mass energy, so that these data can be compared with the corresponding direct $e^+e^-$ measurements. From the $4\\pi$-mass spectrum, the cross section for the process $e^+e^-\\to\\pi^+\\pi^-\\pi^+\\pi^-$ is measured for center-of-mass energies from 0.6 to 4.5 $GeV/c^2$. The uncertainty in the cross section measurement is typically 5%. We also measure the cross sections for the final states $K^+ K^- \\pi^+\\pi^-$ and $K^+ K^- K^+ K^-$. We observe the $J/\\psi$ in all three final states and measure the corresponding branching fractions. We search for X(3872) in $J/\\psi (\\to\\mu^+\\mu^-) \\pi^+\\pi^-$ and obtain an upper limit on the product of the $e^+e^-$ width of the X(3872) and the branching fraction for $X(3872) \\to J/\\psi\\pi^+\\pi^-$.

B. Aubert; BABAR Collaboration

2005-02-12T23:59:59.000Z

363

Appendix G. Radiation Appendix G. Radiation  

E-Print Network [OSTI]

-made sources. People are exposed to naturally occurring radiation constantly. For example, cosmic radiation of radiation and its effects on the environment and biological systems. Radiation comes from natural and humanAppendix G. Radiation #12;#12;Appendix G. Radiation This appendix presents basic facts about

Pennycook, Steve

364

ARM - Measurement - Longwave broadband downwelling irradiance  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

downwelling irradiance downwelling irradiance ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Longwave broadband downwelling irradiance The total diffuse and direct radiant energy, at wavelengths longer than approximately 4 {mu}m, that is being emitted downwards. Categories Radiometric Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments BSRN : Baseline Solar Radiation Network BRS : Broadband Radiometer Station CO2FLX : Carbon Dioxide Flux Measurement Systems

365

ARM - Measurement - Shortwave broadband total downwelling irradiance  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

downwelling irradiance downwelling irradiance ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Shortwave broadband total downwelling irradiance The total diffuse and direct radiant energy that comes from some continuous range of directions, at wavelengths between 0.4 and 4 {mu}m, that is being emitted downwards. Categories Radiometric Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments AMC : Ameriflux Measurement Component BSRN : Baseline Solar Radiation Network

366

Using synchroton radiation-based micro-computer tomography (SR ?-CT) for the measurement of fibre orientations in cellulose fibre-reinforced polylactide (PLA) composites  

Science Journals Connector (OSTI)

The present work deals with the measurement of fibre orientation angles in composites. A study by Bax and Müssig [1] investigated the mechanical properties (tensile and impact characteristics) of injection-moulde...

Nina Graupner; Felix Beckmann; Fabian Wilde; Jörg Müssig

2014-01-01T23:59:59.000Z

367

Implementation of an Integrated Quality Assurance Program for a CT-TPS Process.  

E-Print Network [OSTI]

??Systematic constancy and accuracy of a treatment planning system (TPS) are crucial for the entire radiation treatment planning process (TPP). The Quality Assurance (QA) of… (more)

Wu, Junqing

2002-01-01T23:59:59.000Z

368

Topics in radiation at accelerators: Radiation physics for personnel and environmental protection  

SciTech Connect (OSTI)

In the first chapter, terminology, physical and radiological quantities, and units of measurement used to describe the properties of accelerator radiation fields are reviewed. The general considerations of primary radiation fields pertinent to accelerators are discussed. The primary radiation fields produced by electron beams are described qualitatively and quantitatively. In the same manner the primary radiation fields produced by proton and ion beams are described. Subsequent chapters describe: shielding of electrons and photons at accelerators; shielding of proton and ion accelerators; low energy prompt radiation phenomena; induced radioactivity at accelerators; topics in radiation protection instrumentation at accelerators; and accelerator radiation protection program elements.

Cossairt, J.D.

1996-10-01T23:59:59.000Z

369

Solar Position Algorithm for Solar Radiation Applications (Revised...  

Office of Scientific and Technical Information (OSTI)

Afshin Michael Andreas afshinandreas@nrel.gov (303)384-6383 Measurement & Instrumentation Team Solar Radiation Research Laboratory National...

370

The use of computed radiography plates to determine light and radiation field coincidence  

SciTech Connect (OSTI)

Purpose: Photo-stimulable phosphor computed radiography (CR) has characteristics that allow the output to be manipulated by both radiation and optical light. The authors have developed a method that uses these characteristics to carry out radiation field and light field coincidence quality assurance on linear accelerators.Methods: CR detectors from Kodak were used outside their cassettes to measure both radiation and light field edges from a Varian linear accelerator. The CR detector was first exposed to a radiation field and then to a slightly smaller light field. The light impinged on the detector's latent image, removing to an extent the portion exposed to the light field. The detector was then digitally scanned. A MATLAB-based algorithm was developed to automatically analyze the images and determine the edges of the light and radiation fields, the vector between the field centers, and the crosshair center. Radiographic film was also used as a control to confirm the radiation field size.Results: Analysis showed a high degree of repeatability with the proposed method. Results between the proposed method and radiographic film showed excellent agreement of the radiation field. The effect of varying monitor units and light exposure time was tested and found to be very small. Radiation and light field sizes were determined with an uncertainty of less than 1 mm, and light and crosshair centers were determined within 0.1 mm.Conclusions: A new method was developed to digitally determine the radiation and light field size using CR photo-stimulable phosphor plates. The method is quick and reproducible, allowing for the streamlined and robust assessment of light and radiation field coincidence, with no observer interpretation needed.

Kerns, James R. [Department of Radiation Physics, The University of Texas MD Anderson Cancer Center, Houston, Texas 77030 and Graduate School of Biomedical Sciences, The University of Texas Health Science Center Houston, Houston, Texas 77030 (United States)] [Department of Radiation Physics, The University of Texas MD Anderson Cancer Center, Houston, Texas 77030 and Graduate School of Biomedical Sciences, The University of Texas Health Science Center Houston, Houston, Texas 77030 (United States); Anand, Aman [Department of Radiation Oncology, Mayo Clinic, Scottsdale, Arizona 85259 (United States)] [Department of Radiation Oncology, Mayo Clinic, Scottsdale, Arizona 85259 (United States)

2013-11-15T23:59:59.000Z

371

Radiation Minimum Temperatures  

Science Journals Connector (OSTI)

Frost resulting from cooling of vegetation by nocturnal radiation is a serious agricultural problem. Because of the number of variables involved attacks on this problem from a purely theoretical point of view have met with only moderate success. It seems logical to suppose that an instrument might be devised which would speed up the natural radiation processes and enable an observer to obtain in a few hours a measure of the cooling which occurs naturally over a period of 12 to 14 hr. Such an instrument could serve as a frost warning device. This paper describes the construction of a radiation device and presents experimental evidence to show that it can be used as a predictor of freezing temperatures at vegetation level.

Francis K. Davis Jr.

1957-01-01T23:59:59.000Z

372

Atmospheric State, Cloud Microphysics and Radiative Flux  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

Atmospheric thermodynamics, cloud properties, radiative fluxes and radiative heating rates for the ARM Southern Great Plains (SGP) site. The data represent a characterization of the physical state of the atmospheric column compiled on a five-minute temporal and 90m vertical grid. Sources for this information include raw measurements, cloud property and radiative retrievals, retrievals and derived variables from other third-party sources, and radiative calculations using the derived quantities.

Mace, Gerald

373

E-Print Network 3.0 - attenuates ionizing radiation-induced Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

silica optical Summary: measurements and the so-called radiation-induced attenuation (RIA) measured in dBm. TSL measurements have been... measurements. Connections between...

374

Indoor air quality program set up at EPA  

Science Journals Connector (OSTI)

The Environmental Protection Agency has just set up an indoor air quality program within the Office of Air & Radiation. Its charge is to coordinate EPA's effort to address the multitude of indoor air pollution problems and to distribute information on ...

LOIS EMBER

1987-07-20T23:59:59.000Z

375

Radiation receiver  

DOE Patents [OSTI]

The apparatus for collecting radiant energy and converting same to alternate energy form includes a housing having an interior space and a radiation transparent window allowing, for example, solar radiation to be received in the interior space of the housing. Means are provided for passing a stream of fluid past said window and for injecting radiation absorbent particles in said fluid stream. The particles absorb the radiation and because of their very large surface area, quickly release the heat to the surrounding fluid stream. The fluid stream particle mixture is heated until the particles vaporize. The fluid stream is then allowed to expand in, for example, a gas turbine to produce mechanical energy. In an aspect of the present invention properly sized particles need not be vaporized prior to the entrance of the fluid stream into the turbine, as the particles will not damage the turbine blades. In yet another aspect of the invention, conventional fuel injectors are provided to inject fuel into the fluid stream to maintain the proper temperature and pressure of the fluid stream should the source of radiant energy be interrupted. In yet another aspect of the invention, an apparatus is provided which includes means for providing a hot fluid stream having hot particles disbursed therein which can radiate energy, means for providing a cooler fluid stream having cooler particles disbursed therein, which particles can absorb radiant energy and means for passing the hot fluid stream adjacent the cooler fluid stream to warm the cooler fluid and cooler particles by the radiation from the hot fluid and hot particles. 5 figs.

Hunt, A.J.

1983-09-13T23:59:59.000Z

376

Impact of quantitative feedback and benchmark selection on radiation use by cardiologists performing cardiac angiography  

Science Journals Connector (OSTI)

......testing, cumulative radiation dose, and clinical...to optimize patient safety and image quality in...Government. RPS 14.1-Safety Guide for Radiation Protection in Diagnostic...Review) (2003) Update Software. 9 Grimshaw J. M......

Ian R. Smith; James Cameron; Russell D. Brighouse; Claire M. Ryan; Kelley A. Foster; John T. Rivers

2013-06-01T23:59:59.000Z

377

ARM - Data Quality Program  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Quality Program Quality Program DQ Resources Data Quality Assessment and Control Report (PDF, 747KB) Data Quality Office Data Quality Problem Reporting (DQPR) Contact Us Submit Data Quality Findings Randy Peppler, Data Quality Manager Ken Kehoe, Data Quality Specialist Justin Monroe, Data Quality Specialist Adam Theisen, Data Quality Specialist Sean Moore, Data Quality Consultant Instrument and Site Contacts Instrument Mentors AAF Contacts AMF Contacts NSA Site Contacts SGP Site Contacts TWP Site Contacts Data Quality Program Introduction One of the goals of the ARM Climate Research Facility is to provide datastreams of quality suitable for scientific research. Maintaining data quality for an organization program of the size and complexity of the ARM Facility is a significant challenge; efforts toward this end have matured

378

RADIATION RESEARCH 162, 257263 (2004) 0033-7587/04 $15.00  

E-Print Network [OSTI]

and could possibly be used as a biodosimeter to estimate both the dose and type of radiation exposure. The existence of a stable biomarker in the genome that is dose-dependent and radiation quality-specific would257 RADIATION RESEARCH 162, 257­263 (2004) 0033-7587/04 $15.00 2004 by Radiation Research Society

379

NREL: Solar Radiation Research - Facilities  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Facilities Facilities Photo of two researchers standing on a platform near a solar tracker at the Solar Radiation Research Laboratory. The Solar Radiation Research Laboratory gathers solar radiation and meteorological data on South Table Mountain. NREL's Solar Radiation Research Laboratory (SRRL) has been collecting continuous measurements of basic solar radiation components since 1981. Since then, it has expanded its expertise to include integrated metrology, optics, electronics, and data acquisition capabilities. In addition, the SRRL provides facilities for outdoor performance testing of new research instrumentation and energy conversion devices such as photovoltaic modules. The SRRL is located on NREL's South Table Mountain site in Golden, Colorado, where it has excellent solar access because of its unrestricted

380

Safeguarding indoor air quality  

SciTech Connect (OSTI)

California has created and implemented the first state program devoted exclusively to the investigation of nonindustrial indoor air quality. The program is responsible for promoting and conducting research on the determining factors of healthful indoor environments and is structured to obtain information about emission sources, ventilation effects, indoor concentrations, human activity patterns, exposures, health risks, control measures and public policy options. Data are gathered by a variety of methods, including research conducted by staff members, review of the available scientific literature, participation in technical meetings, contractual agreements with outside agencies, cooperative research projects with other groups and consultation with experts. 23 references, 1 figure, 1 table.

Sexton, K.; Wesolowski, J.J.

1985-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiation measurement quality" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Radiation Protection Act (Pennsylvania)  

Broader source: Energy.gov [DOE]

This Act combines the radiation safety provisions of The Atomic Energy Development and Radiation Control Act and the Environmental Radiation Protection Act, and empowers the Department of...

382

ARM - Measurement - Shortwave narrowband direct downwelling irradiance  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

downwelling irradiance downwelling irradiance ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Shortwave narrowband direct downwelling irradiance The direct unscattered radiant energy from the Sun, in a narrow band of wavelengths shorter than approximately 4 {mu}m, passing through a horizontal unit area in a downward direction. Categories Radiometric Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. Field Campaign Instruments SOAR : Shipboard Oceanographic and Atmospheric Radiation

383

8 - Origins of wine quality  

Science Journals Connector (OSTI)

Publisher Summary Inherent in all serious wine tastings is the explicit or tacit exploration of quality of wine. The major problem is that no clear consensus exists as to what constitutes wine quality. It has frequently been noted that it is easier to perceive quality than to describe it. All broadly based concepts of quality are predicated on attributes such as sensory complexity, subtlety, balance, elegance, development, duration, and uniqueness. Such measures are all subject to marked variation in perception, not only because of differences in human sensory skill, but also because of experience. Although this makes precise description and comparison of wine quality difficult, there is often surprising agreement among judges. This has permitted grape growers and winemakers to roughly understand those practices and features that can lead to wine greatness. Although seldom acknowledged, the most critical factor in wine quality is the winemaker. Our olfactory skills are not up to the task of recognizing the styles of individual winemakers. Grape cultivars' use and production style are next in importance to wine quality. The vast majority of grape cultivars are not known to produce wine with a distinctive aroma. Even some famous cultivars are notorious for their elusive varietal aroma, notably Pinot noir. Production style more distinctly stamps its particular flavor profile on a wine. Storage conditions and aging also progressively modify wine character.

Ronald S. Jackson

2002-01-01T23:59:59.000Z

384

Measurement of natural radioactivity and radon exhalation rate in fly ash samples from a thermal power plant and estimation of radiation doses  

Science Journals Connector (OSTI)

Fly ash produced by coal-burning in thermal power station has become a subject of world wide interest in recent years because of its diverse uses in construction activities and considerable economic and environmental importance. Fly ash is used in the production of bricks, sheets, cement and also in land filling etc. Indian coals used in thermal power plants are found to have high ash contents, resulting in the production of large amount of fly ash. Coal contains radionuclides including uranium (the source of inert gas radon), Th and K. Thus coal combustion results in enhanced concentration of natural radionuclides 226Ra, 232Th and 40K. Since these radionuclides concentration in fly ash plays an important role in health physics it is important to measure radionuclides concentration in fly ash. In the present work enhanced radioactivity and radon exhalation rate from fly ash samples collected from a thermal power plant of NTPC (National Thermal Power Corporation), Dadri (U.P.) India, have been measured. A high resolution gamma ray spectroscopic system has been used for the measurement of natural radioactivity (226Ra, 232Th and 40K). Gamma spectrometric measurements were carried out at Inter-University Accelerator Centre, New Delhi using a coaxial n-type \\{HPGe\\} detector (EG&G, ORTEC, Oak Ridge, USA). Activity concentration of 226Ra varies from 81.8 ± 2.2 to 177.3 ± 10.0 Bq kg?1 with an average value of 118.6 ± 7.4 Bq kg?1 and of 232Th from 111.6 ± 3.2 to 178.5 ± 3.9 Bq kg?1 with an average value of 147.0 ± 3.4 Bq kg?1. 40K activity was found to be below detection limit in some samples while other samples have shown potassium activity to vary from 365.9 ± 4.8 to 495.9 ± 6.2 Bq kg?1 with an average value of 352.0 ± 4.5 Bq kg?1. Surface radon exhalation rates (EA) and Mass exhalation rates (EM) in these samples were measured by “Sealed can technique” using LR-115 type II track detectors. EA is found to vary from 80.1 ± 9.3 to 242.7 ± 16.3 mBq m?2 h?1 with an average value 155.5 ± 12.8 mBq m?2 h?1, while EM varies from 3.1 ± 0.4 to 9.3 ± 0.6 mBq kg?1 h?1 with an average value of 6.0 ± 0.5 mBq kg?1 h?1. Radium equivalent activity (Raeq), related to the external gamma dose and internal dose due to radon and its daughters range from 283.2 to 422.4 Bq kg?1 with an average value of 353.9 Bq kg?1. The calculated values of external hazard index (Hex) vary from 0.77 to 1.87 with an average value of 1.03. Most of the samples show the value of Raeq close to the allowed upper limit of 370 Bq kg?1 and Hex close to unity respectively except in two samples. Annual effective dose varies from 0.15 to 0.23 mSv y?1 with an average value 0.19 mSv y?1.

Mamta Gupta; Ajay Kumar Mahur; Rati Varshney; R.G. Sonkawade; K.D. Verma; Rajendra Prasad

2013-01-01T23:59:59.000Z

385

Radiation protection: Natural radiation risks  

Science Journals Connector (OSTI)

... radiation to which humans are exposed consists of four components - cosmic, gamma, internal, radon. The relative contribution that each makes to the sum is shown in the chart. ... but exposure of the whole body to terrestrial gamma rays and of the lungs to radon daughters are influenced by the nature and location of housing. Gamma rays are emitted ...

M. C. O'Riordan

1983-11-17T23:59:59.000Z

386

Cellular telephone-based radiation detection instrument  

DOE Patents [OSTI]

A network of radiation detection instruments, each having a small solid state radiation sensor module integrated into a cellular phone for providing radiation detection data and analysis directly to a user. The sensor module includes a solid-state crystal bonded to an ASIC readout providing a low cost, low power, light weight compact instrument to detect and measure radiation energies in the local ambient radiation field. In particular, the photon energy, time of event, and location of the detection instrument at the time of detection is recorded for real time transmission to a central data collection/analysis system. The collected data from the entire network of radiation detection instruments are combined by intelligent correlation/analysis algorithms which map the background radiation and detect, identify and track radiation anomalies in the region.

Craig, William W. (Pittsburg, CA); Labov, Simon E. (Berkeley, CA)

2011-06-14T23:59:59.000Z

387

Measuring the quality of later life  

Science Journals Connector (OSTI)

...audit on the e ec- tiveness of medical care and methods to improve it; 2. information...coverage, design of bene ts, organization of health-care providers and reform of payment systems. 14. HEALTH POLICY AND THE ELDERLY Olshansky et al...

1997-01-01T23:59:59.000Z

388

Assessing exposure to radiation  

SciTech Connect (OSTI)

Since the founding of Lawrence Livermore National Laboratory, we have been world leaders in evaluating the risks associated with radiation. Ultrasensitive tools allow us not only to measure radionuclides present in the body but also to reconstruct the radiation dose from past nuclear events and to project the levels of radiation that will still be present in the body for 50 years after the initial intake. A variety of laboratory procedures, including some developed here, give us detailed information on the effects of radiation at the cellular level. Even today, we are re-evaluating the neutron dose resulting from the bombing at Hiroshima. Our dose reconstruction and projection capabilities have also been applied to studies of Nagasaki, Chernobyl, the Mayak industrial complex in the former Soviet Union, the Nevada Test Site, Bikini Atoll, and other sites. We are evaluating the information being collected on individuals currently working with radioactive material at Livermore and elsewhere as well as previously collected data on workers that extends back to the Manhattan Project.

Walter, K.

1997-01-01T23:59:59.000Z

389

Office of Quality Assurance  

Broader source: Energy.gov [DOE]

The Office of Quality Assurance establishes and maintains the quality assurance (QA) policies, requirements and guidance for the Department and serves as DOE's corporate resource to ensure that products and services meet or exceed the Department’s quality objectives.

390

Commercial Building Indoor Environmental Quality Evaluation: Methods and Tools  

E-Print Network [OSTI]

room uses Measurement of sound and vibration isolation (NIC,room uses Measurement of sound and vibration isolation (NIC,Measurement of sound and of CO 2 , PM2.5, and radiation asymmetry with HDR vibration

Heinzerling, David

2012-01-01T23:59:59.000Z

391

E-Print Network 3.0 - aerosol radiative forcing Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

No. DE- Summary: : WHY MEASUREMENTS ALONE CANNOT QUANTIFY AEROSOL RADIATIVE FORCING OF CLIMATE CHANGE Stephen E. Schwartz... of radiative forcing of climate change by aerosols,...

392

NAREL Quality Assurance Project Plan Deployment of Air Monitors to the WIPP Site  

E-Print Network [OSTI]

Requirements for Quality Assurance Project Plans," United States Environmental Protection Agency, OfficeNAREL Quality Assurance Project Plan Deployment of Air Monitors to the WIPP Site Effective Date April 5, 2014 WIPP/QAPP-1 National Analytical Radiation Environmental Laboratory Office of Radiation

393

Surface Water Quality Standards  

E-Print Network [OSTI]

SURFACE WATER QUALITY STANDARDS AAs part of the ongoing program to manage Texaswater quality, the Texas Commission onEnvironmental Quality (TCEQ) is currently review- ing the Texas Surface Water Quality Standards, including the standards... for contact recreation use. Preliminary public comment plus input from the Surface Water Quality Standards Advisory Work Group have provided guidance on options available for revising the standards, said Jim Davenport, leader of the TCEQ Water Quality...

Wythe, Kathy

2007-01-01T23:59:59.000Z

394

Density measurements Viscosity measurements  

E-Print Network [OSTI]

Density measurements Viscosity measurements Temperature measurements Pressure measurements Flow rate measurements Velocity measurements Sensors How to measure fluid flow properties ? Am´elie Danlos Ravelet Experimental methods for fluid flows: an introduction #12;Density measurements Viscosity

Ravelet, Florent

395

Microdosimetric considerations in the use of the boron neutron capture reaction in radiation therapy  

Science Journals Connector (OSTI)

This thesis attempts to further the understanding of the dosimetric and microdosimetric aspects of the boronneutron capture reaction (BNCR) in two distinct radiation therapy modalities the conventional BNCT and boronneutron capture enhanced fast neutron therapy (BNCEFNT). The absorbed dose in these two modalities consists of contributions from gamma rays neutrons and the neutron capture reactions in tissue including the BNCR. The use of low pressure tissue equivalent proportional counters for the dual purpose of dosimetry and microdosimetry of the complex radiation fields used in BNCT and BNCEFNT has been thoroughly investigated. Commercially obtained paired 1/2? Rossi type LET counters (with and without boron-10 in the A-150 TEP wall) were used in this work. The counters were dose calibrated by positioning the proton edge in the measured spectra at a lineal energy of 150 keV/micrometer. Using this paired counter technique the gamma neutron and BNCR dose components in different radiation fields were resolved. Experimental results indicate that this technique is well suited for the dosimetry of BNCT and BNCEFNT fields. The uncertainties in these dose measurements are smaller than or comparable to those achieved using conventional techniques. The microdosimetric spectra measured by the proportional counters have been found to be useful for evaluating the quality of these radiation fields.

Chandrasekhar Kota

1997-01-01T23:59:59.000Z

396

Failure and Redemption of Multifilter Rotating Shadowband Radiometer (MFRSR)/Normal Incidence Multifilter Radiometer (NIMFR) Cloud Screening: Contrasting Algorithm Performance at Atmospheric Radiation Measurement (ARM) North Slope of Alaska (NSA) and Southern Great Plains (SGP) Sites  

SciTech Connect (OSTI)

Well-known cloud-screening algorithms, which are designed to remove cloud-contaminated aerosol optical depths (AOD) from AOD measurements, have shown great performance at many middle-to-low latitude sites around the world. However, they may occasionally fail under challenging observational conditions, such as when the sun is low (near the horizon) or when optically thin clouds with small spatial inhomogeneity occur. Such conditions have been observed quite frequently at the high-latitude Atmospheric Radiation Measurement (ARM) North Slope of Alaska (NSA) sites. A slightly modified cloud-screening version of the standard algorithm is proposed here with a focus on the ARM-supported Multifilter Rotating Shadowband Radiometer (MFRSR) and Normal Incidence Multifilter Radiometer (NIMFR) data. The modified version uses approximately the same techniques as the standard algorithm, but it additionally examines the magnitude of the slant-path line of sight transmittance and eliminates points when the observed magnitude is below a specified threshold. Substantial improvement of the multi-year (1999-2012) aerosol product (AOD and its Angstrom exponent) is shown for the NSA sites when the modified version is applied. Moreover, this version reproduces the AOD product at the ARM Southern Great Plains (SGP) site, which was originally generated by the standard cloud-screening algorithms. The proposed minor modification is easy to implement and its application to existing and future cloud-screening algorithms can be particularly beneficial for challenging observational conditions.

Kassianov, Evgueni I.; Flynn, Connor J.; Koontz, Annette S.; Sivaraman, Chitra; Barnard, James C.

2013-09-11T23:59:59.000Z

397

Environmental Quality: Air (Louisiana)  

Broader source: Energy.gov [DOE]

The Department of Environmental Quality regulates air quality in Louisiana. The Department has an established a fee system for funding the monitoring, investigation and other activities required...

398

Quality Assurance Specialist  

Broader source: Energy.gov [DOE]

The selectee will serve as a Quality Assurance (QA) Specialist within the Department of Energy Idaho Operations Office (DOE-ID). The Quality Assurance Specialist (QAS) provides specialized...

399

Wind Power Quality Test for Comparison of Power Quality Standards  

SciTech Connect (OSTI)

Power quality testing is important to wind power applications for several reasons. The nature of wind turbine generation is different from conventional power plants. Although windfarms are growing in capacity and diversifying in nature in the U.S. and throughout the globe, there is no standard that addresses the power quality of wind turbines or wind farms. The International Electrotechnical Committee (IEC) has convened Working Group 10 (WG10) to address testing and assessment of power quality characteristics of wind turbines. A IEEE task force has been appointed to reconsider flicker measurement procedures in the U.S. Lastly, power quality tests are now required as part of the certification process for wind turbines. NREL began this work both in response to industry request and in support of the IEC working group. (Mr. Gregory is a member of the IEC working group) This paper presents the NREL Certification Testing Team's effort in developing procedures and equipment for power quality testing for wind turbine certification. Summaries of several power quality standards that are applicable to this process are also presented in this paper.

Jacobson, R.; Gregory, B. (National Wind Technology Center)

1999-09-09T23:59:59.000Z

400

Pre-Clinical Radiation Biology and Medical Physics Divisions  

E-Print Network [OSTI]

the uncertainties". Consider the uncertainties in delivering and measuring a dose of radiation to a certain tissue; There are uncertainties inherent in the dose measurement and calculation process Estimates of these uncertainties (forPre-Clinical Radiation Biology and Medical Physics Divisions Department of Radiation Oncology Tom

Note: This page contains sample records for the topic "radiation measurement quality" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Development of Real-Time Measurement of Effective Dose for High Dose Rate Neutron Fields  

SciTech Connect (OSTI)

Studies of the effects of low doses of ionizing radiation require sources of radiation which are well characterized in terms of the dose and the quality of the radiation. One of the best measures of the quality of neutron irradiation is the dose mean lineal energy. At very low dose rates this can be determined by measuring individual energy deposition events, and calculating the dose mean of the event size. However, at the dose rates that are normally required for biology experiments, the individual events can not be separated by radiation detectors. However, the total energy deposited in a specified time interval can be measured. This total energy has a random variation which depends on the size of the individual events, so the dose mean lineal energy can be calculated from the variance of repeated measurements of the energy deposited in a fixed time. We have developed a specialized charge integration circuit for the measurement of the charge produced in a small ion chamber in typical neutron irradiation experiments. We have also developed 4.3 mm diameter ion chambers with both tissue equivalent and carbon walls for the purpose of measuring dose mean lineal energy due to all radiations and due to all radiations except neutrons, respectively. By adjusting the gas pressure in the ion chamber, it can be made to simulate tissue volumes from a few nanometers to a few millimeters in diameter. The charge is integrated for 0.1 seconds, and the resulting pulse height is recorded by a multi channel analyzer. The system has been used in a variety of photon and neutron radiation fields, and measured values of dose and dose mean lineal energy are consistent with values extrapolated from measurements made by other techniques at much lower dose rates. It is expected that this technique will prove to be much more reliable than extrapolations from measurements made at low dose rates because these low dose rate exposures generally do not accurately reproduce the attenuation and scattering environment of the actual radiation exposure.

L. A. Braby; W. D. Reece; W. H. Hsu

2003-08-29T23:59:59.000Z

402

Radiating gravastars  

SciTech Connect (OSTI)

Considering a Vaidya exterior spacetime, we study dynamical models of prototype gravastars, made of an infinitely thin spherical shell of a perfect fluid with the equation of state p = ?, enclosing an interior de Sitter spacetime. We show explicitly that the final output can be a black hole, an unstable gravastar, a stable gravastar or a 'bounded excursion' gravastar, depending on how the mass of the shell evolves in time, the cosmological constant and the initial position of the dynamical shell. This work presents, for the first time in the literature, a gravastar that emits radiation.

Chan, R. [Coordenaçăo de Astronomia e Astrofísica, Observatório Nacional, Rua General José Cristino, 77, Săo Cristóvăo 20921-400, Rio de Janeiro, RJ (Brazil); Silva, M.F.A. da [Departamento de Física Teórica, Instituto de Física, Universidade do Estado do Rio de Janeiro, Rua Săo Francisco Xavier 524, Maracană 20550-900, Rio de Janeiro - RJ (Brazil); Rocha, Jaime F. Villas da [Instituto de Biocięncias, Departamento de Cięncias Naturais, Universidade Federal do Estado do Rio de Janeiro, Av. Pasteur 458, Urca, CEP 22290-240, Rio de Janeiro, RJ (Brazil); Wang, Anzhong, E-mail: chan@on.br, E-mail: mfasnic@gmail.com, E-mail: jfvroch@pq.cnpq.br, E-mail: anzhong_wang@baylor.edu [GCAP-CASPER, Department of Physics, Baylor University, Waco, TX 76798 (United States)

2011-10-01T23:59:59.000Z

403

A Device for Search of Gamma-Radiation Intensive Sources at the Radiation Accident Condition  

SciTech Connect (OSTI)

The procedure designed for measuring angular distributions of gamma radiation and for search of gamma radiation intensive sources is described. It is based on application of the original multidetector device ShD-1, for measuring an angular distribution in a complete solid angle (4 pi). The calibration results and data on the angular distributions of intensity of gamma radiation at the roof of Chornobyl NPP ''Shelter'' are presented.

Batiy, Valeriy; Klyuchnykov, A; Kochnev, N; Rudko, Vladimir; shcherbin, vladimir; Yegorov, V; Schmieman, Eric A.

2005-08-08T23:59:59.000Z

404

Management Perspective: Structure of Radiation Emergency Response in Japan  

Science Journals Connector (OSTI)

Due to previous local and international radiation incidents, emergency planning and preparedness measures have evolved in Japan. This chapter looks at the history of radiation emergency medicine in Japan and the ...

Takako Tominaga M.D.; Ph.D.; Misao Hachiya Ph.D.…

2014-01-01T23:59:59.000Z

405

Wood Quality: The Effects  

E-Print Network [OSTI]

Wood Quality: The Effects of Planting Density and Thinning Eini C. Lowell PNW Research Station wood quality? By volume, characteristic, product? #12;http://jilldenton.files.wordpress.com/2007, faster #12;What is it that defines wood quality?What is it that defines wood quality? Density: earlywood

406

Track 9: Quality Assurance  

Broader source: Energy.gov [DOE]

ISM Workshop Presentations Knoxville Convention Center, Knoxville, TN August 2009 Track 9: Quality Assurance

407

Radiation protection in inhomogeneous beta–gamma fields and modelling of hand phantoms with MCNPX  

Science Journals Connector (OSTI)

......performed using the MCNPX software. In order to investigate...recommendations regarding radiation protection measures...Karlsruhe GmbH, Central Safety Department, KES...Simulation Gamma Rays Hand radiation effects Humans Models...radiation effects Software...

Ch. Blunck; F. Becker; L. Hegenbart; B. Heide; J. Schimmelpfeng; M. Urban

2009-02-01T23:59:59.000Z

408

Implementation of dose management system at radiation protection board of Ghana Atomic Energy Commission  

Science Journals Connector (OSTI)

......12-20. 7 Occupational Radiation Protection. Radiation Protection and Safety Guide. (2002) GRPB-G3...International Commission on Radiation Units and Measurements...system (DMS) is a computer software developed by the International......

F. Hasford; J. K. Amoako; E. O. Darko; G. Emi-Reynolds; E. K. Sosu; F. Otoo; G. O. Asiedu

2012-01-01T23:59:59.000Z

409

The whole-body counting facility at the Swedish Radiation Safety Authority after relocation  

Science Journals Connector (OSTI)

......the Swedish Radiation Safety Authority new location...funded by the Swedish Radiation Safety Authority. ACKNOWLEDGMENTS...Measurements of gamma-radiation from the human body...ORTEC. MCA emulator software version 6.0. 2000......

L. del Risco Norrlid; I. Östergren

2011-03-01T23:59:59.000Z

410

Changes in Silicone Polymeric Fluids due to High-Energy Radiation  

Science Journals Connector (OSTI)

...Fluids due to High-Energy Radiation A. Charlesby When subjected to high-energy radiation, polydimethyl...confirmed by elastic measurements. Unit pile radiation is found...cross-linking. The energy per cross-link is about...

1955-01-01T23:59:59.000Z

411

Natural and Radiation Carcinogenesis in Man. III. Radiation Carcinogenesis  

Science Journals Connector (OSTI)

...mice. NATURAL AND RADIATION CARCINOGENESIS IN MAN. 3. RADIATION CARCINOGENESIS. | Journal Article | Japan Neoplasms etiology Neoplasms, Radiation-Induced Radiation Genetics | JAPAN NEOPLASM ETIOLOGY NEOPLASMS, RADIATION-INDUCED RADIATION...

1965-01-01T23:59:59.000Z

412

MULTI-POINT RADIATION MONITOR  

SciTech Connect (OSTI)

A unique radiation monitor has been developed for performing wide-area field surveys for radiation sources. This device integrates the real-time output of multiple radiation detectors into a hand-held personal computer (e.g., a PDA) containing an intuitive graphical user interface. An independent hardware module supplies high voltage to the detectors and contains a rapid sampling system for transferring the detector count rates through an interface to the PDA. The imbedded firmware can be changed for various applications using a programmable memory card. As presently configured, the instrument contains a series of Geiger-Mueller (GM) tubes in a flexible detector string. This linear array of multiple sensors can be used by US Coast Guard and Customs container inspection personnel to measure radiation intensity in stacks of transport containers where physical access is impeded.

Hofstetter, K; Donna Beals, D; Ken Odell, K; Robert Eakle, R; Russell Huffman, R; Larry Harpring, L

2006-05-12T23:59:59.000Z

413

Low Dose Radiation Program: Links - Online Literature  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Online Literature Online Literature Journals, Books and other Publications Armed Forces Radiobiology Research Institute Chornobyl Center for Nuclear Safety Radioactive Waste and Radioecology "Insight" Magazine Central Research Institute of the Electric Power Industry (CRIEPI) News: Aiming at an information center on low dose radiation research Health Physics International Journal of Radiation Biology Iranian Journal of Radiation Research Journal of Radiological Protection National Council on Radiation Protection and Measurements Radiation Research U.S. Department of Energy (DOE) Information Bridge Reports Animal Cancer Tests and Human Cancer Risk Assessment: A Broad Perspective Effects of Ionizing Radiation: Atomic Bomb Survivors and Their Children (1945-1995) Health Effects of Exposure to Low Levels of Ionizing Radiation: BEIR

414

Calibration method for video and radiation imagers  

DOE Patents [OSTI]

The relationship between the high energy radiation imager pixel (HERIP) coordinate and real-world x-coordinate is determined by a least square fit between the HERIP x-coordinate and the measured real-world x-coordinates of calibration markers that emit high energy radiation imager and reflect visible light. Upon calibration, a high energy radiation imager pixel position may be determined based on a real-world coordinate of a moving vehicle. Further, a scale parameter for said high energy radiation imager may be determined based on the real-world coordinate. The scale parameter depends on the y-coordinate of the moving vehicle as provided by a visible light camera. The high energy radiation imager may be employed to detect radiation from moving vehicles in multiple lanes, which correspondingly have different distances to the high energy radiation imager.

Cunningham, Mark F. (Oak Ridge, TN); Fabris, Lorenzo (Knoxville, TN); Gee, Timothy F. (Oak Ridge, TN); Goddard, Jr., James S. (Knoxville, TN); Karnowski, Thomas P. (Knoxville, TN); Ziock, Klaus-peter (Clinton, TN)

2011-07-05T23:59:59.000Z

415

A cost/benefit model for insertion of technological innovation into a total quality management program  

E-Print Network [OSTI]

for measuring quality improvement is the cost of quality. Traditionally, comprehensive quality cost reports have regularly been issued in a fixed format to identify opportunities for improvement and provide guidelines for improvement over time. However, current...

Ratliff, William L

2012-06-07T23:59:59.000Z

416

Toward the Development of Multi-Year Total and Special Solar Radiation Budgets at the Three ARM Locales  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

the Development of Multi-Year Total and Special the Development of Multi-Year Total and Special Solar Radiation Budgets at the Three ARM Locales Z. Li and M. C. Cribb Earth System Science Interdisciplinary Center University of Maryland College Park, Maryland A. P. Trishchenko Canada Centre for Remote Sensing Ottawa, Ontario, Canada Introduction Over the past decade, an unprecedented amount of high-quality observational data pertaining to atmospheric and surface parameters has been collected at Atmospheric Radiation Measurement (ARM) locales around the globe. These data have been critical in the development and validation of models used to study the complex interaction of cloud, aerosols, and the surface on the solar radiative budget (SRB), the primary force driving atmospheric circulation. As the next step forward, the challenge of

417

Abstract P1-13-08: A Cross-Sectional Study Evaluating Bone Quantity and Quality in Women with Bone Metastases from Breast Cancer  

Science Journals Connector (OSTI)

...investigate low linear energy transfer (LET) radiation-induced...target size and radiation quality and are likely to have...involved high linear energy transfer (LET) alpha-particles...target size and radiation quality and are likely to have...Humans Hybrid Cells Linear Energy Transfer Magnetics Mutagenesis...

OC Freedman; E Amir; AM Cheung; H Hu; E Lee; G Dranitsaris; and MJ. Clemons

2010-12-15T23:59:59.000Z

418

Radiation Safety  

Broader source: Energy.gov (indexed) [DOE]

Brotherhood of Locomotive Brotherhood of Locomotive Engineers & Trainmen Scott Palmer BLET Radiation Safety Officer New Hire Training New Hire study topics * GCOR * ABTH * SSI * Employee Safety * HazMat * Railroad terminology * OJT * 15-week class * Final test Hazardous Materials * Initial new-hire training * Required by OSHA * No specified class length * Open book test * Triennial module Locomotive Engineer Training A little bit older...a little bit wiser... * Typically 2-4 years' seniority * Pass-or-get-fired promotion * Intensive program * Perpetually tested to a higher standard * 20 Weeks of training * 15 of that is OJT * General Code of Operating Rules * Air Brake & Train Handling * System Special Instructions * Safety Instructions * Federal Regulations * Locomotive Simulators * Test Ride * Pass test with 90% Engineer Recertification

419

The Applicability of the International Classification of Functioning, Disability, and Health to Study Lifestyle and Quality of Life of Colorectal Cancer Survivors  

Science Journals Connector (OSTI)

...mice is radiation quality dependent Kamal Datta...Purpose: Radiation quality depends on loss of energy in tissues per unit...iron (56-Fe) ion (energy: 1 GeV/nucleon...Gy determined using a quality factor 1.25 and 1...

Eline H. van Roekel; Martijn J.L. Bours; Carin P.M. de Brouwer; Huib Ten Napel; Silvia Sanduleanu; Geerard L. Beets; IJmert Kant; and Matty P. Weijenberg

2014-07-01T23:59:59.000Z

420

9.01 - Interaction of Ionizing Radiation with Matter  

Science Journals Connector (OSTI)

Abstract The aim of this chapter is to give an overview and try to show how the different interaction probabilities will influence the transport of ionizing radiation through matter. This knowledge is important in different aspects of medical applications of radiation. It has an impact in designing an optimal treatment gantry, in the choice of radiation quality, and of course when determining the absorbed dose distribution in the body. It is also important in diagnostic radiology when optimizing the image quality. Knowledge of the interaction of radiation with matter is also fundamental for understanding the biological effect of radiation and its variation with ionization density. The focus will not be on the basic physics and deriving the different cross sections but on the impact of these cross sections on imaging and therapy in medical physics applications. Ionizing radiation is normally divided into charged particles (previously called directly ionizing radiation) such as leptons, ?-particles, protons and other light ions, and uncharged particles (previously called indirectly ionizing radiation) such as photons (x-rays or ?-rays) and neutrons. This chapter will concentrate on radiation qualities used in radiotherapy, and the main part will be dedicated to electrons and photons with energies up to around 50 MeV and light ions with energies up to 900 MeV per nucleon. The presentation is divided into two main sections, charged particles and photons.

B. Nilsson; A. Brahme

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiation measurement quality" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Atmospheric Radiation Measurement Convective and Orographically...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of precipitation. These data will be combined with coincident radar, aircraft, and satellite data to improve how clouds and precipitation in low-mountain regions are...

422

MEASUREMENT OF CIRCUMSOLAR RADIATION - STATUS REPORT  

E-Print Network [OSTI]

e. g. , when a nearby heliostat was opera- ting) or for adetermine the size of a heliostat ·field necessary for a

Grether, D.F.

2011-01-01T23:59:59.000Z

423

MEASUREMENT AND ANALYSIS OF CIRCUMSOLAR RADIATION  

E-Print Network [OSTI]

on~ line" during receiver or heliostat tests. The telescopesbetween contending heliostat designs for the Barstm. ; 10 Hw

Grether, D.F.

2013-01-01T23:59:59.000Z

424

Natural radiation environment III. [Lead Abstract  

SciTech Connect (OSTI)

Separate abstracts were prepared for the 52 research papers presented at this symposium in April 1978. The major topics in this volume deal with penetrating radiation measurements, radiation surveys and population exposure, radioactivity in the indoor environment, and technologically enhanced natural radioactivity. (KRM)

Gesell, T.F.; Lowder, W.M. (eds.)

1980-01-01T23:59:59.000Z

425

The Earth Radiation Budget Experiment (ERBE)  

Science Journals Connector (OSTI)

The Earth Radiation Budget Experiment (ERBE) is the first multi-satellite system designed to measure the Earth's radiation budget. It will fly on a low-inclination NASA satellite and two Sun-synchronous NOAA satellites during the mid-1980s. Each ...

Bruce R. Barkstrom

1984-11-01T23:59:59.000Z

426

Radiative Decay of the Muon  

Science Journals Connector (OSTI)

The radiative decay of the muon, ?+?e++?+?e+?Ż?, has been measured using muons from the Columbia University Nevis synchrocyclotron. The decay products e+ and ? were observed at relative angles near 180°, using scintillation counters and two 9-in.×10-in. NaI crystals, which enabled simultaneous measurement of the positron and ? energies. The pulses from the crystals were displayed on oscilloscopes and photographed, and the measured amplitudes of these pulses were calibrated using the positron spectrum of the nonradiative decay. The two-dimensional energy spectrum for positrons and ?'s was obtained for about 900 events, after subtraction of background. This spectrum and the measured rate, obtained by normalizing to the nonradiative decay, were compared with theoretical predictions for the radiative decay. The results were in good agreement with the theory, within statistics, for the case of pure V-A coupling.

E. Bogart; E. DiCapua; P. Némethy; A. Strelzoff

1967-04-25T23:59:59.000Z

427

Interoperability testing for shop floor measurement  

Science Journals Connector (OSTI)

Manufactured parts are typically measured to ensure quality. Measurement involves equipment and software from many different vendors, and interoperability is a major problem faced by manufacturers. The I++ Dimensional Measuring Equipment (DME) specification ... Keywords: interoperability, measurement, software testing

Fred Proctor; Bill Rippey; John Horst; Joe Falco; Tom Kramer

2007-08-01T23:59:59.000Z

428

Measuring in All the Right Places: Themes in International Municipal Eco-City Index Systems  

E-Print Network [OSTI]

lacks measurement units. For instance, energy use intensityEnergy and Climate Water Quality, Avail- ability, and Treatment Air Quality Commonality Secondary Category Example units of measurement

Williams, Christopher

2014-01-01T23:59:59.000Z

429

Nuclear radiation electronic gear  

Science Journals Connector (OSTI)

Nuclear radiation electronic gear ... Examines the line of nuclear radiation instrumentation offered by Nuclear-Chicago Corporation and Victoreen Instrument Company. ... Nuclear / Radiochemistry ...

S. Z. Lewin

1961-01-01T23:59:59.000Z

430

Radiation Control (Virginia)  

Broader source: Energy.gov [DOE]

The Department of Health is responsible for regulating radiation and radioactive materials in the Commonwealth of Virginia. Although the Department's Radiation Control Program primarily focuses on...

431

OLYMPIC AIR QUALITY QUESTIONABLE  

Science Journals Connector (OSTI)

OLYMPIC AIR QUALITY QUESTIONABLE ... Athletes GOING FOR GOLD worry about Beijing’s air ... Atmospheric chemists say the air quality during the Beijing Games literally rests on which direction the winds blow. ...

RACHEL PETKEWICH

2008-07-28T23:59:59.000Z

432

Quality Assurance Program  

Broader source: Energy.gov [DOE]

Formal EM policy on the use of the corporate Quality Assurance Program (EM-QA-001 Rev. 1) to ensure all EM projects utilize a consistent quality assurance approach.

433

Residential HVAC Indoor Air Quality(ASHRAE 62.2)  

E-Print Network [OSTI]

Residential HVAC && Indoor Air Quality(ASHRAE 62.2) Tav Commins #12;Contact Information · Energy construction, Additions /Alterations · Nonresidential and Residential #12;Residential HVAC && Indoor Air Quality(ASHRAE 62.2) ·HVAC EfficiencyHVAC Efficiency ·Quality Installation (HERS Measures) S li b HERS R t

434

RESIDENTIAL LOCATION CHOICE AND TRAVEL BEHAVIOR: IMPLICATIONS FOR AIR QUALITY  

E-Print Network [OSTI]

RESIDENTIAL LOCATION CHOICE AND TRAVEL BEHAVIOR: IMPLICATIONS FOR AIR QUALITY UC Davis-Caltrans Air Avenue Davis, CA 95616 Prepared for The California Department of Transportation Mike Brady, Air Quality control measure. #12;RESIDENTIAL LOCATION CHOICE AND TRAVEL BEHAVIOR: IMPLICATIONS FOR AIR QUALITY

Levinson, David M.

435

Low Dose Radiation Program: Radiation Biology and the Radiation Research  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Biology and the Radiation Research Program Biology and the Radiation Research Program The Department of Energy (DOE) and its predecessor organizations, Energy Research and Development Agency (ERDA) and Atomic Energy Commission (AEC), always have been concerned about the health effects of ionizing radiation. Extensive research has been conducted under their sponsorship at all levels of biological organization from molecules to man. Over the past 60 years, studies using every type of radiation source have included exposure to both external radiation sources and to internally deposited radioactive materials. These exposures used different dose patterns and distributions delivered over a wide range of experimental times. This extensive research provided the basis for the new Low Dose Radiation Research Program, linking

436

Sources Of Average Individual Radiation Exposure  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Of Average Individual Radiation Exposure Of Average Individual Radiation Exposure Natural background Medical Consumer products Industrial, security, educational and research Occupational 0.311 rem 0.300 rem 0.013 rem 0.0003 rem 0.0005 rem Savannah River Nuclear Solutions, LLC, provides radiological protection services and oversight at the Savannah River Site (SRS). These services include radiation dose measurements for persons who enter areas where they may be exposed to radiation or radioactive material. The results are periodically reported to monitored individuals. The results listed are based on a radiation dose system developed by the International Commission on Radiation Protection. The system uses the terms "effective dose," "equivalent dose" and units of rem. You may be more familiar with the term "millirem" (mrem), which is 1/1000 of a rem.

437

Low Dose Radiation Research Program: About  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

About About Background. Extensive research on the health effects of radiation using standard epidemiological and toxicological approaches has been done for decades to characterize responses of populations and individuals to high radiation doses, and to set exposure standards to protect both the public and the workforce. These standards were set using models that extrapolated from the cancers observed following exposure to high doses of radiation to predicted, but not measurable, changes in cancer frequency at low radiation doses. The use of models was necessary because of our inability to detect changes in cancer incidence following low doses of radiation. Historically, the predominant approach has been the Linear-no-Threshold model (see Wikipedia entry) and collective dose concept that assumes each unit of radiation, no

438

Apparatus and method for detecting gamma radiation  

DOE Patents [OSTI]

A high efficiency radiation detector is disclosed for measuring X-ray and gamma radiation from small-volume, low-activity liquid samples with an overall uncertainty better than 0.7% (one sigma SD). The radiation detector includes a hyperpure germanium well detector, a collimator, and a reference source. The well detector monitors gamma radiation emitted by the reference source and a radioactive isotope or isotopes in a sample source. The radiation from the reference source is collimated to avoid attenuation of reference source gamma radiation by the sample. Signals from the well detector are processed and stored, and the stored data is analyzed to determine the radioactive isotope(s) content of the sample. Minor self-attenuation corrections are calculated from chemical composition data. 4 figures.

Sigg, R.A.

1994-12-13T23:59:59.000Z

439

Low Dose Radiation Research Program: William F. Morgan  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

William F. Morgan William F. Morgan Pacific Northwest National Laboratory PO Box 999 Richland, Washington About this Project Projects Using a Low LET Electron Microbeam to Investigate Non-Targeted Effects of Low Dose Radiation. Optimizing the Scientific, Regulatory, and Societal Impact of the DOE Low Dose Radiation Research Program A Mechanistic Study of the Radiation Quality Dependence of Bystander Effects in Human Cells. Genetic Factors Affecting Susceptibility to Low-Dose Radiation Mechanisms of Adaptive Responses and Genomic Instability Induced by Low Dose/ Low Dose Rate Radiation Technical Abstracts 2006 Workshop: Using a Low-LET Electron Microbeam to Investigate Non-Targeted Effects of Low Dose Radiation Sowa, M.B., Goetz, W., Baulch, J., and Morgan, W.F. Genetic Factors Affecting Susceptibility to Low-Dose Radiation

440

Radiation regime in a tropical dry deciduous forest in western Mexico  

Science Journals Connector (OSTI)

Solar radiation (Qc), sunshine hours (n) and reflectance coefficients or albedo (A...) were measured above, and photosynthetically active radiation (PAR) was measured above and within three levels in a tropical d...

V. L. Barradas

1991-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiation measurement quality" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Assessment of Low Linear Energy Transfer Radiation–Induced Bystander Mutagenesis in a Three-Dimensional Culture Model  

Science Journals Connector (OSTI)

...Department of Energy cleanup operations...mutation was a measurement of changes...with low-energy protons (28...Puck TT. Measurement of mutagenesis...on Radiation Units and Measurements; 1984. 23...low linear energy transfer radiation-induced...

Rudranath Persaud; Hongning Zhou; Sarah E. Baker; Tom K. Hei; and Eric J. Hall

2005-11-01T23:59:59.000Z

442

Air Quality Responses to Changes in Black Carbon and Nitrogen Oxide Emissions  

E-Print Network [OSTI]

Measurements of total nitrate and ammonia were made during the Pittsburgh Air Quality Study using a steam

Millstein, Dev

2009-01-01T23:59:59.000Z

443

Fluidization quality analyzer for fluidized beds  

DOE Patents [OSTI]

A control loop and fluidization quality analyzer for a fluidized bed utilizes time varying pressure drop measurements. A fast-response pressure transducer measures the overall bed pressure drop, or over some segment of the bed, and the pressure drop signal is processed to produce an output voltage which changes with the degree of fluidization turbulence. 9 figs.

Daw, C.S.; Hawk, J.A.

1995-07-25T23:59:59.000Z

444

Solid cancer incidence among the Chernobyl emergency workers residing in Russia: estimation of radiation risks  

Science Journals Connector (OSTI)

For the method of radiation dose measurement, the dosimetric data for the studied... 1. Exposure or absorbed dose recorded...

V. K. Ivanov; A. I. Gorski; A. F. Tsyb…

2004-05-01T23:59:59.000Z

445

Decreased aortic growth and middle aortic syndrome in patients with neuroblastoma after radiation therapy  

E-Print Network [OSTI]

2004) Radiation doses in pediatric radiology: influence ofPediatric thoracic aorta: normal measurements determined with CT. Radiology

2009-01-01T23:59:59.000Z

446

Stanford University HRPP Continuous Quality Improvement (CQI) Program  

E-Print Network [OSTI]

/13 Research Compliance Office STANFORD measures and improves, when necessary, compliance with organizational measures and improves, when necessary, the quality, effectiveness, and efficiency of the Human Research to assess compliance with organizational policies and procedures and applicable laws, regulations, codes

Puglisi, Joseph

447

Quality assurance and data management  

SciTech Connect (OSTI)

This report contains graphs and tables relating to quality assurance and data management for environmental quality at Hanford Reservation.

Lockrem, L.L.

1998-01-12T23:59:59.000Z

448

Quality management system in the CIEMAT Radiation Dosimetry Service  

Science Journals Connector (OSTI)

......the national regulatory authority. The...instructions of the Spanish regulatory body(3). CIEMAT...QMS, an action plan focused on the organisation...identified in the initial review, the implementation...provides the edition, review, approval and distribution...and verification plans, definition of......

R. Martín; T. Navarro; A. M. Romero; M. A. López

2011-03-01T23:59:59.000Z

449

Quality management system in the CIEMAT Radiation Dosimetry Service  

Science Journals Connector (OSTI)

......spectrometry (NaI (Tl), low energy germanium and Fastscan detection...management system, an external auditor made a revision of the initial...CSN. 4 International Atomic Energy Agency. The management system...GS-R-3. 5 Internatinal Atomic Energy Agency. Application of the......

R. Martín; T. Navarro; A. M. Romero; M. A. López

2011-03-01T23:59:59.000Z

450

Radiation Protection and Safety Training | Environmental Radiation...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

The objective of this course is to provide students with an introduction to the fundamentals of ionizing radiation protection and safety. The course curriculum combines...

451

Speech quality in wireless systems  

Science Journals Connector (OSTI)

Modern wireless communication systems require a very sophisticated design from the electrical as well as from the acoustical point of view. Since the maximum of functionality needs to be integrated in designs—getting smaller with every new generation—not much space is left for the acoustical components. In addition such sets typically are used in noisy environments. In order to provide a minimum of speech quality a careful design of the acoustical components as well as of the according electrical components is required. Very often there is a strong interaction between those. The presentation will describe the typical types of signal processing and acoustical designs used in such sets and will give methodologies on how to assess the speech quality relevant parameters of such sets. Measurements for optimizing the acoustical design will be described. In addition system evaluation procedures for nonlinear and time?variant signal processing are discussed.

Hans Wilhelm Gierlich; Winfried Krebber; Frank Kettler

1999-01-01T23:59:59.000Z

452

Impact of aircraft emissions on air quality in the vicinity of airports. Volume I. Recent airport measurement programs, data analyses, and sub-model development. Final report Jan78-Jul 80  

SciTech Connect (OSTI)

This report documents the results of the Federal Aviation Administration (FAA)/Environmental Protection Agency (EPA) air quality study which has been conducted to assess the impact of aircraft emissions of carbon monoxide (CO), hydrocarbons (HC), and oxides of nitrogen (NOx) in the vicinity of airports. This assessment includes the results of recent modeling and monitoring efforts at Washington National (DCA), Los Angeles International (LAX), Dulles International (IAD), and Lakeland, Florida airports and an updated modeling of aircraft generated pollution at LAX, John F. Kennedy (JFK) and Chicago O'Hare (ORD) airports. The Airport Vicinity Air Pollution (AVAP) model which was designed for use at civil airports was used in this assessment. In addition the results of the application of the military version of the AVAP model the Air Quality Assessment Model (AQAM), are summarized.

Yamartino, R.J.; Smith, D.G.; Bremer, S.A.; Heinold, D.; Lamich, D.

1980-07-01T23:59:59.000Z

453

Quality Work Plan Update  

Energy Savers [EERE]

resources and quality assurance Improving long term sustainability by building the foundation of the national industry with WAP at the core 2 Responding to Network Concerns...

454

Safety & Quality Assurance  

Broader source: Energy.gov [DOE]

Together, our Facility Operations Division and Engineering, Safety and Quality Division work to ensure EM conducts its operations and cleanup safely through sound practices. These divisions ensure...

455

Water Quality (Louisiana)  

Broader source: Energy.gov [DOE]

These regulations establish requirements and procedures for permitting, enforcement, monitoring, and surveillance, and spill control activities of the Department of Environmental Quality. Without...

456

Air-Quality Regulations  

Science Journals Connector (OSTI)

n...Federal, state and/or local regulations constructed for the purpose of protecting air quality, e.g., low volatile organic compounds...

Jan W. Gooch

2011-01-01T23:59:59.000Z

457

Air-quality regulations  

Science Journals Connector (OSTI)

n....Federal, state and/or local regulations constructed for the purpose of protecting air quality, e.g., low volatile organic compounds...

2007-01-01T23:59:59.000Z

458

Section 22: Quality Assurance  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Quality Assurance (40 CFR 194.22) United States Department of Energy Waste Isolation Pilot Plant Carlsbad Field Office Carlsbad, New Mexico Compliance Recertification...

459

Plutonium radiation surrogate  

DOE Patents [OSTI]

A self-contained source of gamma-ray and neutron radiation suitable for use as a radiation surrogate for weapons-grade plutonium is described. The source generates a radiation spectrum similar to that of weapons-grade plutonium at 5% energy resolution between 59 and 2614 keV, but contains no special nuclear material and emits little .alpha.-particle radiation. The weapons-grade plutonium radiation surrogate also emits neutrons having fluxes commensurate with the gamma-radiation intensities employed.

Frank, Michael I. (Dublin, CA)

2010-02-02T23:59:59.000Z

460

Measurement-Measurement-  

E-Print Network [OSTI]

Internet Measurement- System A Measurement- System B Control System GPS Satellite GPS Satellite GPS Receiver GPS Receiver 2) measurement 3) data1) command Methodology for One-way IP Performance Measurement This paper proposes a methodology for measurement of one-way IP performance metrics such as one-way delay

Jeong, Jaehoon "Paul"

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461

Zirconium Plate Measuring Instrument (ZPMI) Design Report  

SciTech Connect (OSTI)

This report describes the design of a device intended to measure radiation-induced strain in zirconium plate specimens as a function of neutron fluence.

K. Davies; J. H. Jackson

2013-10-01T23:59:59.000Z

462

ARM - Evaluation Product - Radiatively Important Parameters Best Estimate  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ProductsRadiatively Important Parameters Best ProductsRadiatively Important Parameters Best Estimate (RIPBE) Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Evaluation Product : Radiatively Important Parameters Best Estimate (RIPBE) 2002.03.01 - 2007.06.30 Site(s) SGP General Description The Radiatively Important Parameters Best Estimate (RIPBE) VAP combines multiple input datastreams, each with their own temporal and vertical resolution, to create a complete set of radiatively important parameters on a uniform vertical and temporal grid with quality control and source information for use as input to a radiative transfer model. One of the main drivers for RIPBE was to create input files for the BroadBand Heating Rate Profiles (BBHRP) VAP, but we also envision use of RIPBE files for user-run