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Health Physics

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https://www.readbyqxmd.com/read/27911888/author-guidelines
#1
(no author information available yet)
No abstract text is available yet for this article.
January 2017: Health Physics
https://www.readbyqxmd.com/read/27906791/health-physics-society-%C3%A2-2017-affiliate-members
#2
(no author information available yet)
No abstract text is available yet for this article.
January 2017: Health Physics
https://www.readbyqxmd.com/read/27906790/the-health-physics-society-an-affiliate-of-the-international-radiation-protection-association-irpa
#3
(no author information available yet)
No abstract text is available yet for this article.
January 2017: Health Physics
https://www.readbyqxmd.com/read/27906789/radon-and-thoron-in-air-occupational-exposure-study-within-selected-wine-cellars-of-the-western-cape-south-africa-and-associated-annual-effective-doses
#4
R Botha, R T Newman, R Lindsay, P P Maleka
This is the first known study of exposure of Rn (radon) and secondarily Rn (thoron) in-air activity concentrations assessed within nine selected wine cellars in four wine districts of the Western Cape (South Africa) and the associated annual occupational effective doses. E-PERM electret ion chambers (EIC) and RAD-7 α-detectors were used to perform these measurements. The radon in-air levels ranged from 12 ± 4 Bq m to 770 ± 40 Bq m within the nine selected wine cellars. Eight of the nine wine cellars (excluding results from cellar w-6) had a median radon in-air activity concentration of 48 ± 8 Bq m...
January 2017: Health Physics
https://www.readbyqxmd.com/read/27906788/ds02r1-improvements-to-atomic-bomb-survivors-input-data-and-implementation-of-dosimetry-system-2002-ds02-and-resulting-changes-in-estimated-doses
#5
H M Cullings, E J Grant, S D Egbert, T Watanabe, T Oda, F Nakamura, T Yamashita, H Fuchi, S Funamoto, K Marumo, R Sakata, Y Kodama, K Ozasa, K Kodama
Individual dose estimates calculated by Dosimetry System 2002 (DS02) for the Life Span Study (LSS) of atomic bomb survivors are based on input data that specify location and shielding at the time of the bombing (ATB). A multi-year effort to improve information on survivors' locations ATB has recently been completed, along with comprehensive improvements in their terrain shielding input data and several improvements to computational algorithms used in combination with DS02 at RERF. Improvements began with a thorough review and prioritization of original questionnaire data on location and shielding that were taken from survivors or their proxies in the period 1949-1963...
January 2017: Health Physics
https://www.readbyqxmd.com/read/27906787/temporal-variations-of-air-dose-rates-in-east-fukushima-during-japanese-fiscal-years-2012-and-2013
#6
Kazuhiro Akimoto
Temporal variations of ambient air dose rates in eastern Fukushima prefecture during Japanese fiscal years 2012 and 2013 are analyzed. The average overall variation rate of air dose rates in east Fukushima during the examined period is found to be 0.49 (51% down) compared to the theoretically predicted value 0.65 (35% down) based on physical decay of radioactive cesium nuclides. On average, local dose rates declined almost linearly for the relatively short period. Temporal characteristics of air dose rates may be classified into variation rates, peaks, spikes, and oscillations...
January 2017: Health Physics
https://www.readbyqxmd.com/read/27906786/an-underappreciated-radiation-hazard-from-high-voltage-electrodes-in-vacuum
#7
Adam D West, Zack Lasner, David DeMille, Elizabeth P West, Cristian D Panda, John M Doyle, Gerald Gabrielse, Adam Kryskow, Corinne Mitchell
The use of high voltage (HV) electrodes in vacuum is commonplace in physics laboratories. In such systems, it has long been known that electron emission from an HV cathode can lead to bremsstrahlung x rays; indeed, this is the basic principle behind the operation of standard x-ray sources. However, in laboratory setups where x-ray production is not the goal and no electron source is deliberately introduced, field-emitted electrons accelerated by HV can produce x rays as an unintended hazardous byproduct. Both the level of hazard and the safe operating regimes for HV vacuum electrode systems are not widely appreciated, at least in university laboratories...
January 2017: Health Physics
https://www.readbyqxmd.com/read/27906785/210po-in-human-saliva-of-smokeless-tobacco-users
#8
Maria Assunta Meli, Donatella Desideri, Carla Roselli, Laura Feduzi
The occurrence and mobility of Po in oral smokeless tobacco products (STPs) were determined because its effects on human health must be taken into account. This research was subdivided into two parts: determination by alpha spectrometry of the Po activity concentration in 16 oral smokeless tobacco products of different brands purchased in local specialty stores in Europe and evaluation of its percent extraction into an artificial salivary gland during sucking or chewing operations. Polonium-210 was detected in all samples, and its concentrations ranged from 3...
January 2017: Health Physics
https://www.readbyqxmd.com/read/27906784/a-biokinetic-model-for-systemic-nickel
#9
Dunstana R Melo, Richard W Leggett
The International Commission on Radiological Protection (ICRP) is updating its suite of reference biokinetic models for internally deposited radionuclides. This paper reviews data for nickel and proposes an updated biokinetic model for systemic (absorbed) nickel in adult humans for use in radiation protection. Compared with the ICRP's current model for nickel, the proposed model is based on a larger set of observations of the behavior of nickel in human subjects and laboratory animals and provides a more realistic description of the paths of movement of nickel in the body...
January 2017: Health Physics
https://www.readbyqxmd.com/read/27906783/evaluation-of-the-potential-optical-radiation-hazards-with-led-lamps-intended-for-home-use
#10
Robert H James, Robert J Landry, Bennett N Walker, Ilko K Ilev
The authors evaluated the potential for ocular damage from optical radiation emitted by Light Emitting Diode (LED) based lamps used for general illumination. Ten LED lamps were randomly selected off the shelf from a local home improvement store. The LEDs were behind diffusers in half of these lamps, while in the other half, the LEDs were clearly visible. In addition, a battery powered LED lantern having a LED source behind a diffuser was measured. The optical radiation emissions from two common incandescent lamps were also measured to compare the relative hazards of LED and incandescent lamps...
January 2017: Health Physics
https://www.readbyqxmd.com/read/27906782/predicting-heart-dose-in-breast-cancer-patients-who-received-3d-conformal-radiation-therapy
#11
Daniel Wollschläger, Heiko Karle, Marcus Stockinger, Detlef Bartkowiak, Sandra Bührdel, Hiltrud Merzenich, Thomas Wiegel, Heinz Schmidberger, Maria Blettner
Cardiac late effects are a major health concern for long-term survivors after radiotherapy for breast cancer. Large cohort studies to better understand the exact dose-response relationship require individual estimates of radiation dose to the heart. To predict individual cardiac dose from information that is typically available for all members of a retrospective epidemiological cohort study, 774 female breast cancer patients treated with megavoltage tangential field radiotherapy in 1998-2008 were examined. All dose distributions were calculated using Eclipse with the anisotropic analytical algorithm (AAA) for photon fields and the electron Monte Carlo algorithm for electron boost fields...
January 2017: Health Physics
https://www.readbyqxmd.com/read/27798482/health-physics-society-%C3%A2-2016-affiliate-members
#12
(no author information available yet)
No abstract text is available yet for this article.
December 2016: Health Physics
https://www.readbyqxmd.com/read/27798481/the-health-physics-society-an-affiliate-of-the-international-radiation-protection-association-irpa
#13
(no author information available yet)
No abstract text is available yet for this article.
December 2016: Health Physics
https://www.readbyqxmd.com/read/27798480/news-and-notices
#14
(no author information available yet)
No abstract text is available yet for this article.
December 2016: Health Physics
https://www.readbyqxmd.com/read/27798479/100-kbq-m-3-radon-activity-concentration-in-the-atmosphere-of-a-bathroom-supplied-with-groundwater-from-a-gneissic-rock-area-with-consanguineous-intrusions
#15
Per Søstrand, Langård Sverre, Tor Erik Danielsen
Inhalation of escaping radon from groundwater comprises the largest part of radiological hazard from groundwater radionuclides in the uranium and thorium series. Groundwater containing 1.5 mg dm uranium and 3 kBq dm radon activity concentration supplied an ordinary bathroom of 15 m in a home. Using the showerhead, atmospheric levels of radon activity in the bathroom exceeded 100 kBq m within a period of about 1 h.
December 2016: Health Physics
https://www.readbyqxmd.com/read/27798478/use-of-transportable-radiation-detection-instruments-to-assess-internal-contamination-from-intakes-of-radionuclides-part-ii-calibration-factors-and-icat-computer-program
#16
Robert Anigstein, Richard H Olsher, Donald A Loomis, Armin Ansari
The detonation of a radiological dispersion device or other radiological incidents could result in widespread releases of radioactive materials and intakes of radionuclides by affected individuals. Transportable radiation monitoring instruments could be used to measure radiation from gamma-emitting radionuclides in the body for triaging individuals and assigning priorities to their bioassay samples for in vitro assessments. The present study derived sets of calibration factors for four instruments: the Ludlum Model 44-2 gamma scintillator, a survey meter containing a 2...
December 2016: Health Physics
https://www.readbyqxmd.com/read/27798477/thermal-response-of-human-skin-to-microwave-energy-a-critical-review
#17
Kenneth R Foster, Marvin C Ziskin, Quirino Balzano
This is a review/modeling study of heating of tissue by microwave energy in the frequency range from 3 GHz through the millimeter frequency range (30-300 GHz). The literature was reviewed to identify studies that reported RF-induced increases in skin temperature. A simple thermal model, based on a simplified form of Pennes' bioheat equation (BHTE), was developed, using parameter values taken from the literature with no further adjustment. The predictions of the model were in excellent agreement with available data...
December 2016: Health Physics
https://www.readbyqxmd.com/read/27798476/skin-response-to-single-and-fractionated-irradiation-dynamic-modeling-approach
#18
Olga A Smirnova, Francis A Cucinotta
A biologically motivated mathematical model of the dynamics of swine skin epidermis after single acute irradiation () is extended to describe the effects of fractionated irradiation on this vital body system. The extended model, as the initial one, is a system of nonlinear ordinary differential equations whose variables and parameters have clear biological meaning. The performed studies of the model reveal a correlation between the dynamics of the dimensionless concentration of corneal cells of the upper skin layer and the dynamics of the fraction of the area of swine skin epidermis without moist desquamation under fractionated irradiation similar to that after single acute irradiation ()...
December 2016: Health Physics
https://www.readbyqxmd.com/read/27798475/fractal-theory-and-field-cover-experiments-implications-for-the-fractal-characteristics-and-radon-diffusion-behavior-of-soils-and-rocks
#19
Wanyu Tan, Yongmei Li, Kaixuan Tan, Xianzhe Duan, Dong Liu, Zehua Liu
Radon diffusion and transport through different media is a complex process affected by many factors. In this study, the fractal theories and field covering experiments were used to study the fractal characteristics of particle size distribution (PSD) of six kinds of geotechnical materials (e.g., waste rock, sand, laterite, kaolin, mixture of sand and laterite, and mixture of waste rock and laterite) and their effects on radon diffusion. In addition, the radon diffusion coefficient and diffusion length were calculated...
December 2016: Health Physics
https://www.readbyqxmd.com/read/27798474/2016-student-science-awards
#20
(no author information available yet)
No abstract text is available yet for this article.
December 2016: Health Physics
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