scholarly journals Measurement uncertainty in broadband radiofrequency radiation level measurements

2014 ◽  
Vol 29 (1) ◽  
pp. 53-57
Author(s):  
Branislav Vulevic ◽  
Cedomir Belic ◽  
Luka Perazic
Keyword(s):  
Electric Field ◽  
Radio Frequency ◽  
Measurement Uncertainty ◽  
Residential Areas ◽  
Radiation Level ◽  
New Approach ◽  
Radio Frequency Radiation ◽  
Broadband Radio ◽  
Frequency Radiation

For the evaluation of measurement uncertainty in the measurement of broadband radio frequency radiation, in this paper we propose a new approach based on the experience of the authors of the paper with measurements of radiofrequency electric field levels conducted in residential areas of Belgrade and over 35 municipalities in Serbia. The main objective of the paper is to present practical solutions in the evaluation of broadband measurement uncertainty for the in-situ RF radiation levels.

scholarly journals Analysis and Evaluation of Specific Absorption Rate of GSM Signal in Port Harcourt, Nigeria

2019 ◽  
pp. 1-10
Author(s):  
Promise Elechi ◽  
Sunny Orike ◽  
Promise Agugharam
Keyword(s):  
Electric Field ◽  
Radio Frequency ◽  
Human Health ◽  
Power Density ◽  
Human Body ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Specific Absorption ◽  
Radio Frequency Radiation ◽  
Frequency Radiation

There is a growing concern in the world that residents close to GSM base station facilities are exposed to electromagnetic radiation which causes different health illness like cancer, leukemia, memory lost, dizziness, fatigue, etc. This study puts to rest the position on the effect of radiofrequency (RF) radiation from GSM masts on human health. In this research work, the evaluation and assessment of radio frequency radiation in five selected mobile base stations facilities in Obio/Akpor Local Government of Rivers State, Nigeria were carried out using an EMF meter for measurement of Electric field. The measurements of the radio frequency radiation with the EMF meter was conducted from 0 – 300m away from the selected base transceivers stations facilities of the selected telecommunication operators (MTN, Globacom and Airtel) in Nigeria. The data obtained from the research were analyzed using Specific Absorption Rate formula to establish whether with time exposure to RF radiation will have negative impact on human health. The normal specific absorption rate (SAR) and the Power Density for the general public whole body was assessed from the measured electric field strength and the results were compared with that of International Commission on Non Ionization Radiation Protection (ICNIRP).The results showed that the average amount of SAR for the selected five base transceiver station (BTS) facilities were within the range of 0.0037 W/kg – 0.0084 W/kg and the power density 1.5183 W/m2 – 9.5083 W/m2. These values are lower than the recommended limit by ICNIRP which is 0.08w/kg for the human body. This study has shown that there is inconsequential effect on human health because the non-ionizing electromagnetic energy has no sufficient energy to affect any part of human body for the residents living close to the selected BTS facilities of the various telecommunication providers.

Health Risks of Electromagnetic Fields. Part II: Evaluation and Assessment of Radio Frequency Radiation

2003 ◽  
Vol 31 (3) ◽  
pp. 197-254 ◽  
Author(s):  
Riadh W. Y. Habash ◽  
Lynn M. Brodsky ◽  
William Leiss ◽  
Daniel Krewski ◽  
Michael Repacholi
Keyword(s):  
Radio Frequency ◽  
Electromagnetic Fields ◽  
Health Risks ◽  
Radio Frequency Radiation ◽  
Frequency Radiation ◽  
Evaluation And Assessment

Nonmonotonic superconducting transitions in mesoscopic Al structures induced by radio-frequency radiation

1996 ◽  
Vol 53 (17) ◽  
pp. 11332-11335 ◽  
Author(s):  
C. Strunk ◽  
V. Bruyndoncx ◽  
C. Van Haesendonck ◽  
V. V. Moshchalkov ◽  
Y. Bruynseraede ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Radio Frequency Radiation ◽  
Frequency Radiation ◽  
Superconducting Transitions

scholarly journals Analysis of the Cellular Stress Response in MCF10A Cells Exposed to Combined Radio Frequency Radiation

2012 ◽  
Vol 53 (2) ◽  
pp. 176-183 ◽  
Author(s):  
Han-Na KIM ◽  
Na-Kyung HAN ◽  
Mi-Na HONG ◽  
Sung-Gil CHI ◽  
Yun-Sil LEE ◽  
...  
Keyword(s):  
Stress Response ◽  
Radio Frequency ◽  
Cellular Stress ◽  
Cellular Stress Response ◽  
Radio Frequency Radiation ◽  
Mcf10a Cells ◽  
Frequency Radiation

Volumetric fusion of graphite-doped nylon 12 powder with radio frequency radiation

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Jared Allison ◽  
John Pearce ◽  
Joseph Beaman ◽  
Carolyn Seepersad
Keyword(s):  
Radio Frequency ◽  
Rf Heating ◽  
Thermoplastic Polymers ◽  
Content Type ◽  
Plate Electrode ◽  
Radio Frequency Radiation ◽  
Powder Bed ◽  
Nylon 12 ◽  
Electrode Chamber ◽  
Frequency Radiation

Purpose Additive manufacturing (AM) of thermoplastic polymers for powder bed fusion processes typically requires each layer to be fused before the next can be deposited. The purpose of this paper is to present a volumetric AM method in the form of deeply penetrating radio frequency (RF) radiation to improve the speed of the process and the mechanical properties of the polymer parts. Design/methodology/approach The focus of this study was to demonstrate the volumetric fusion of composite mixtures containing polyamide (nylon) 12 and graphite powders using RF radiation as the sole energy source to establish the feasibility of a volumetric AM process for thermoplastic polymers. Impedance spectroscopy was used to measure the dielectric properties of the mixtures as a function of increasing graphite content and identify the percolation limit. The mixtures were then tested in a parallel plate electrode chamber connected to an RF generator to measure the heating effectiveness of different graphite concentrations. During the experiments, the surface temperature of the doped mixtures was monitored. Findings Nylon 12 mixtures containing between 10% and 60% graphite by weight were created, and the loss tangent reached a maximum of 35%. Selective RF heating was shown through the formation of fused composite parts within the powder beds. Originality/value The feasibility of a novel volumetric AM process for thermoplastic polymers was demonstrated in this study, in which RF radiation was used to achieve fusion in graphite-doped nylon powders.

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