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==Anti-gravity claims== |
==Anti-gravity claims== |
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In a series of papers co-authored with fellow university physicist [[Douglas Torr]] and published between 1991 and 1993, she claimed a practical way to produce anti-gravity effects. She claimed that an anti-gravity effect could be produced by rotating ions creating a [[gravitomagnetism|gravitomagnetic]] field perpendicular to their spin axis. In her theory, if a large number of ions could be aligned, (in a [[Bose–Einstein condensate]]) the resulting effect would be a very strong gravitomagnetic field producing a strong repulsive force. The alignment may be possible by trapping [[superconductor]] ions in a lattice structure in a [[High-temperature superconductivity|high-temperature superconducting]] disc. Li claimed that experimental results confirmed her theories.<ref>{{cite journal|journal=Physical Review|date=January 15, 1991 |
In a series of papers co-authored with fellow university physicist [[Douglas Torr]] and published between 1991 and 1993, she claimed a practical way to produce anti-gravity effects. She claimed that an anti-gravity effect could be produced by rotating ions creating a [[gravitomagnetism|gravitomagnetic]] field perpendicular to their spin axis. In her theory, if a large number of ions could be aligned, (in a [[Bose–Einstein condensate]]) the resulting effect would be a very strong gravitomagnetic field producing a strong repulsive force. The alignment may be possible by trapping [[superconductor]] ions in a lattice structure in a [[High-temperature superconductivity|high-temperature superconducting]] disc. Li claimed that experimental results confirmed her theories.<ref>{{cite journal|journal=Physical Review|date=January 15, 1991|title=Effects of a gravitomagnetic field on pure superconductors|last1=Li|first1=Ning|last2=Torr|first2=DG|volume=D43|issue=2|pages=457–459|doi=10.1103/PhysRevD.43.457|bibcode = 1991PhRvD..43..457L }}</ref><ref>{{cite journal|journal=Physical Review|date=September 1, 1992|doi=10.1103/PhysRevB.46.5489|title=Gravitational effects on the magnetic attenuation of superconductors|last1=Li|first1=Ning|last2=Torr|first2=DG|volume=B46|issue=9|page=5489|bibcode = 1992PhRvB..46.5489L }}</ref><ref>{{cite journal|last1=Li|first1=Ning|last2=Torr|first2=DG|journal=Foundations of Physics Letters|title=Gravito-electric coupling via superconductivity|volume=6|issue=4|pages=371–383|date=August 1, 1993|doi=10.1007/BF00665654|bibcode = 1993FoPhL...6..371T }}</ref> Her claim of having functional anti-gravity devices was cited by the popular press and in popular science magazines with some enthusiasm at the time.<ref>{{cite journal |url=http://www.highbeam.com/doc/1G1-65730414.html|title=Taming Gravity|journal=Popular Mechanics|date=October 1, 2000|first=Jim|last=Wilson|accessdate=January 5, 2014}}</ref><ref>{{cite web|url=http://www.light-science.com/gen2.html|title=Gravity Conquered?|last=Cain|first=Jeanette|publisher=light-science.com|accessdate=January 5, 2014|deadurl=yes|archiveurl=https://web.archive.org/web/20130706031149/http://www.light-science.com/gen2.html|archivedate=July 6, 2013|df=}}</ref> However, in 1997 Li published a paper describing an experiment that showed the effect was very small, if it existed at all.<ref>{{cite journal| author=N. Li| display-authors=4| author2=D. Noever| author3=T. Robertson| author4=R. Koczor| author5=W. Brantley| last-author-amp=yes |title=Static Test for a Gravitational Force Coupled to Type II YBCO Superconductors|journal=[[Physica C]]|url=http://www.sciencedirect.com/science/article/pii/S0921453497014627|volume=281|issue=2–3|date=August 1997|pages=260–267|bibcode = 1997PhyC..281..260L |doi = 10.1016/S0921-4534(97)01462-7 }}</ref> |
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Li is reported to have left the University of Alabama in 1999 to found the company ''AC Gravity LLC''. AC Gravity was awarded a [[United States Department of Defense|U.S. DOD]] grant for $448,970 in 2001 to continue anti-gravity research. The grant period ended in 2002 but no results from this research were ever made public.<ref>{{cite web|url=http://www.acq.osd.mil/dpap/Docs/FY01RPT.doc|title=Annual Report on Cooperative Agreements and Other Transactions Entered into During FY2001 Under 10 USC 2371|publisher=DOD |
Li is reported to have left the University of Alabama in 1999 to found the company ''AC Gravity LLC''. AC Gravity was awarded a [[United States Department of Defense|U.S. DOD]] grant for $448,970 in 2001 to continue anti-gravity research. The grant period ended in 2002 but no results from this research were ever made public.<ref>{{cite web|url=http://www.acq.osd.mil/dpap/Docs/FY01RPT.doc|title=Annual Report on Cooperative Agreements and Other Transactions Entered into During FY2001 Under 10 USC 2371|publisher=DOD |
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Revision as of 05:43, 27 January 2019
Ning Li is an American scientist known for her controversial claims about anti-gravity devices. She worked as a physicist at the Center for Space Plasma and Aeronomic Research, University of Alabama in Huntsville, in the 1990s. In 1999, she left the university to form a company, AC Gravity, LLC, to continue anti-gravity research.
Anti-gravity claims
In a series of papers co-authored with fellow university physicist Douglas Torr and published between 1991 and 1993, she claimed a practical way to produce anti-gravity effects. She claimed that an anti-gravity effect could be produced by rotating ions creating a gravitomagnetic field perpendicular to their spin axis. In her theory, if a large number of ions could be aligned, (in a Bose–Einstein condensate) the resulting effect would be a very strong gravitomagnetic field producing a strong repulsive force. The alignment may be possible by trapping superconductor ions in a lattice structure in a high-temperature superconducting disc. Li claimed that experimental results confirmed her theories.[1][2][3] Her claim of having functional anti-gravity devices was cited by the popular press and in popular science magazines with some enthusiasm at the time.[4][5] However, in 1997 Li published a paper describing an experiment that showed the effect was very small, if it existed at all.[6]
Li is reported to have left the University of Alabama in 1999 to found the company AC Gravity LLC. AC Gravity was awarded a U.S. DOD grant for $448,970 in 2001 to continue anti-gravity research. The grant period ended in 2002 but no results from this research were ever made public.[7] Although no evidence exists that the company ever performed any other work, as of 2014, AC Gravity still remains listed as an "existent" business.[8]
See also
References
- ^ Li, Ning; Torr, DG (January 15, 1991). "Effects of a gravitomagnetic field on pure superconductors". Physical Review. D43 (2): 457–459. Bibcode:1991PhRvD..43..457L. doi:10.1103/PhysRevD.43.457.
- ^ Li, Ning; Torr, DG (September 1, 1992). "Gravitational effects on the magnetic attenuation of superconductors". Physical Review. B46 (9): 5489. Bibcode:1992PhRvB..46.5489L. doi:10.1103/PhysRevB.46.5489.
- ^ Li, Ning; Torr, DG (August 1, 1993). "Gravito-electric coupling via superconductivity". Foundations of Physics Letters. 6 (4): 371–383. Bibcode:1993FoPhL...6..371T. doi:10.1007/BF00665654.
- ^ Wilson, Jim (October 1, 2000). "Taming Gravity". Popular Mechanics. Retrieved January 5, 2014.
- ^ Cain, Jeanette. "Gravity Conquered?". light-science.com. Archived from the original on July 6, 2013. Retrieved January 5, 2014.
{{cite web}}: Unknown parameter|deadurl=ignored (|url-status=suggested) (help) - ^ N. Li; D. Noever; T. Robertson; R. Koczor; et al. (August 1997). "Static Test for a Gravitational Force Coupled to Type II YBCO Superconductors". Physica C. 281 (2–3): 260–267. Bibcode:1997PhyC..281..260L. doi:10.1016/S0921-4534(97)01462-7.
{{cite journal}}: Unknown parameter|last-author-amp=ignored (|name-list-style=suggested) (help) - ^ "Annual Report on Cooperative Agreements and Other Transactions Entered into During FY2001 Under 10 USC 2371". DOD. p. 66. Retrieved March 6, 2014.
- ^ "Business Entity Details, AC Gravity, LLC". Alabama, Secretary of State. Retrieved March 6, 2014.
External links
- Breaking the Law of Gravity A 1998 Wired magazine article reviewing her work, as well as others.
- Bose-Einstein and Anti-Gravity A narrative of Li's theory of operation and her future plans from the 1990s.
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