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Under a worst-case scenario, they could even strip away part of our planet’s atmosphere.
Those are the findings of a new paper by physicist Sierra Solter-Hunt, who warns of the effects of dangers of growing satellite ‘megaconstellations’ such as those launched by Elon Musk’s SpaceX.
Ms Solter-Hunt suggests that ‘spacecraft dust’ from defunct satellites that burn up in the atmosphere may create enough magnetic dust to cut our planet’s protective shield in half.
The paper, yet to be peer-reviewed, reveals the growing volume of magnetic particles left behind from dead satellites could create a band of plasma dust with a charge stronger than the rest of the magnetosphere – the part of Earth’s atmosphere that protects us from solar radiation.
The net could create its own electrical charge and expose satellites to high levels of radiation and solar storms, as well as make it harder for rockets to launch new satellites and other spacecraft into space, as the magnetic particles could mess with the onboard electronics.
Furthermore, geomagnetic reversals due to the meandering of the earth’s central core are also the root cause of accelerated and more intense tectonic displacements, super volcanic aerosol emissions, tropospheric ozone depletion, increases in natural CO2 emissions, increases of solar irradiation at surface, atmospheric and tropospheric levels, and increases in GCRF and solar irradiation at all levels of earth atmosphere and surface.
Of interest to this paper is the fact that the highest flux of GCRF on record occurred during the
2006 solar minimum. In 2006 the earth’s magnetic field had weakened by 10% from normal. Normal, according to NASA, is an inconstant magnetic field of 0.5 Gauss by =/- 0.03 Gauss. A 10% decrease is -0.05 which is double the window of error. More current reports indicate that earth magnetic field has further deteriorated in the last 10 years to 15% of normal.
examples of their medical applications that relate to spinal, orthopedic and dental implants, bone grafts and scaffolds, platforms for intelligent synthetic neural circuits, antibacterial and antiviral particles and coatings, optical biosensors, and nano-photonic waveguides for sophisticated medical diagnostic devices are all covered in the research reviewed herein. The examples provided convincingly show that silicon nitride is destined to become a leader to replace titanium and other entrenched biomaterials in many fields of medicine.
One new [Fig. 1(A)] and two retrieved cross-linked UHMWPE acetabular cups [Figs. 1(B) and 1(C)] were investigated. The two retrieved acetabular cups were obtained at the time of revision surgery from total hip arthroplasty. All the acetabular components investigated in this study were manufactured by Biomet Japan Incorporated (Tokyo, Japan). New acetabular components (ArCom®, Biomet Incorporated) were made from GUR 1050 bar stock by isostatic compression molding (with no addition of calcium stearate) and successive surface irradiation by a ? -ray dose of 33kGy
The short-term retrieved acetabular components were both made of highly cross-linked polyethylene, manufactured from 1900H bar stock by isostatic compression molding (with no addition of calcium stearate) (ArComÒ, Biomet Japan Inc., Tokyo, Japan
Thus, we compared acetabular cups made of two types of polyethylenes, the old ArCom® and new ArComXL™.
Two types of acetabular cups were examined, which were both manufactured by Biomet Inc., Warsaw, IN.
One new and four retrieved cross-linked UHMWPE acetabular cups have been investigated. The four retrieved acetabular cups were obtained at the time of the re-spective hip arthroplasty revision surgeries. All acetabular components (ArCom ® , Biomet) were made from 1900H bar stock by isostatically direct compression molding and surface irradiated by a ? -ray dose of 33 kGy.
Three types of acetabular liners were analyzed, which had gone through a different manufacturing process. All liners had a diameter of 32 mm and were provided by Biomet Inc., Warsaw, IN, USA. One type of liner was the newly launched liner E1®, available on the international market since 2007. Another type of component belonged to a former generation of polyethylene, the brand ArCom®, which was clinically introduced in 1995 and it is currently commercially available.
The 28?mm sized 3Y-TZP femoral heads (n = 3) were provided by Biomet Inc. (Warsaw, IN). These were manufactured by Saint-Gobain Desmarquest Inc. (Evreux, France). These heads were distributed with the trade name of Prozyr (currently out of market since 2001).
Schematic cross-section representation of the AMC (BIOLOX® delta) acetabular system (G7®, Zimmer Biomet G.K., Tokyo, Japan).
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