Research on electromagnetic radiation from laptop computers, combining RF emissions (WiFi, Bluetooth) and ELF magnetic fields from electronics.
Your laptop sits inches from your body for hours each day, emitting radiofrequency radiation from its WiFi antenna and extremely low frequency magnetic fields from its internal components. These emissions span a remarkably wide range, from 50 Hz power frequencies up to 5.8 GHz wireless signals, creating what researchers call a "mixed exposure environment" right on your lap or desk. What makes laptops particularly concerning from an EMF perspective is their proximity to your body combined with duration of use.
J. A. Martin · 1970
This 1970 technical report examined the biological effects of electromagnetic fields from what's called a 'siege array,' focusing on microwave radiation's impact on the human body. The research investigated pulse field effects and radiation heating patterns, representing early military or defense-related EMF exposure studies. This work contributed to understanding how concentrated electromagnetic energy affects human biology.
D. R. Thompson, C. D. Orcutt · 1970
Unknown authors · 1970
This 1970 technical report describes the development of a liquid crystal-based device for measuring microwave power density. Liquid crystals change color or appearance when exposed to electromagnetic fields, making them useful for detecting and measuring microwave radiation levels. This represents early work in developing practical tools to quantify microwave exposure.
not clearly visible · 1970
Microwave ovens usually generate about 1500 watts of radiation at either 915 or 2450 megahertz, with the former near the most dangerous frequency and the latter near the most dangerous frequency for cataracts. A government survey of 155 microwave ovens in hospitals, restaurants, and homes revealed 51 with excessive radiation leakage. Officials described the industry as relatively new and doubted significant health damage had occurred, but the article calls this complacent attitude widespread and unjustified.
Unknown authors · 1970
Unknown authors · 1970
René JOLY · 1970
Terri Aaronson · 1970
KOLDAEV VM · 1970
R. W. Carson, W. E. Innis · 1970
Researchers measured hand-to-hand RF impedance in 16 individuals across the 2 to 30 MHz range using a vector impedance meter with copper tube electrodes. The real part of impedance was approximately the same for all individuals at each frequency, decreasing from about 760 ohms at 2 MHz to about 133 ohms at 30 MHz. These experimental values agreed well with a prior theoretical study. The real part followed an approximately negative exponential pattern across the frequency range.
Unknown authors · 1970
Unknown authors · 1970
Heller JH · 1970
This 1970 research examined how microwave radiation affects cells at the genetic level, focusing on chromosome changes and other cellular effects in laboratory organisms like protozoa. The study represents early scientific investigation into microwave radiation's biological impact, decades before widespread cellular technology. This foundational research helped establish that microwave radiation can cause measurable biological changes in living cells.
Unknown authors · 1970
This 1970 technical report documented the development of a specialized instrument using liquid crystal technology to measure microwave power density levels. The research focused on creating measurement tools for detecting and quantifying microwave radiation exposure. This work contributed to early efforts in developing accurate methods for assessing electromagnetic field exposure levels.
Unknown authors · 1970
Harry Levine, Robert L. Moore · 1970
This 1970 government technical report examined how microwave energy distributes inside microwave ovens and evaluated methods for testing oven safety. The research developed analytical techniques to measure internal energy patterns and assess test load performance. This foundational work helped establish safety standards for microwave oven design and operation.
Q. Balzano, O. Garay, F.R. Steel · 1970
This 1970 technical report examined electromagnetic field exposure levels experienced by operators using portable radios at 30 MHz frequency. Researchers used phantom models and tissue simulation techniques to measure power density and assess potential exposure risks. This represents early scientific efforts to understand occupational EMF exposure from two-way radio equipment.
Yagi, K. · 1970
A. Zufarov, B. B. Shenealbe · 1970
Manfred R. M. Blashy · 1970
Karel Marha · 1970
Harry Levine, Robert L. Moore · 1970
This 1970 government study examined how microwave energy distributes inside microwave ovens and evaluated standard test methods for measuring this radiation. The research focused on understanding internal energy patterns and developing proper testing protocols for microwave oven safety evaluation.
Wideband · 1970
William A. Herman · 1970
The document explains that microwave radiation interacts with biological systems mainly by heating tissue. The accepted biological damage from excessive exposure is hyperthermia, with certain organs like the eyes and testicles being most sensitive. Cataract formation in the eye occurs at power densities of hundreds of mW/cm², while testicular damage can occur at about 10 mW/cm² but is slight and recoverable.
J. A. Martin · 1970
This 1970 SRI technical report examined biological effects from electromagnetic fields generated by radar systems, specifically focusing on a 'siege array' configuration. The study investigated both heating and shock effects from electromagnetic radiation exposure on human subjects, representing early research into radar's biological impacts.