The Cultural-historical Value of and Problems with Digitized Advertisements. Historical Newspapers and the Portable Radio, 1950-1969

2015 ◽  
Vol 0 (38) ◽  
pp. 51 ◽  
Author(s):  
Jesper Verhoef
Keyword(s):  
Portable Radio

scholarly journals Assessment of the Electromagnetic Field Exposure during the Use of Portable Radios in the Context of Potential Health Effects

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6276
Author(s):  
Jarosław Kieliszek ◽  
Joanna Wyszkowska ◽  
Jaromir Sobiech ◽  
Robert Puta
Keyword(s):  
Electromagnetic Field ◽  
Health Effects ◽  
Computer Simulations ◽  
Thermal Effects ◽  
The Body ◽  
Control Group ◽  
Field Exposure ◽  
Potential Health ◽  
Portable Radio ◽  
Neurophysiological Tests

The paper presents research on the electromagnetic hazards related to the flow of electric currents throughout the bodies of employees using portable radios. The values often exceed established limits, which may lead to potential dysfunctions of the body and affect the safety of performed professional duties. The measurements of the electric field (E-field) distribution of a typical commercial portable radio, the limb contact current calculations, and the computer simulations determining a specific absorption rate (SAR) were supplemented with pilot neurophysiological tests. The assessment indicated a large spatial variability of the E-field strength around the devices. The head of the operator and the hand holding the radio were often in the electromagnetic field (EMF), which exceeded the established limits. The calculated SAR values ranged within the permitted limits. The conducted neurophysiological tests showed no effects of EMF exposure in comparison to the control group. The assessment of exposure to the EMF using a portable radio is initially performed by analyzing external measures: both computer simulations and measurements of workers’ limb currents. The SAR values exclude thermal effects; however, they do not eliminate potential neuromuscular effects. More neurophysiological tests are needed to obtain a broader picture of possible health effects.

Low-overhead symbol timing and carrier recovery for TDMA portable radio systems

1990 ◽  
Vol 38 (10) ◽  
pp. 1886-1892 ◽  
Author(s):  
N.R. Sollenberger ◽  
J.C.-I. Chuang
Keyword(s):  
Carrier Recovery ◽  
Symbol Timing ◽  
Portable Radio ◽  
Radio Systems

Time-slot management in digital portable radio systems

1991 ◽  
Vol 40 (1) ◽  
pp. 261-272 ◽  
Author(s):  
R.C. Bernhardt
Keyword(s):  
Time Slot ◽  
Portable Radio ◽  
Radio Systems
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