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WHY?- THE 373K SUPERCONDUCTORS ARTICLE -ARXIV:1603.01482v1 was downloaded by more then 26000 physicists - colleagues scientists and others interested but it is disregarded without a single critical argument ? THE ANSWER IS VERY SIMPLE -IT HAS BEEN WRONGLY ASSUMED THAT All SUPERCONDUCTORS MUST LEVITATE IN ABOUT 1.4 T STRONG MAGNETIC FIELD. THE LEVITATION, HOWEVER, IS NOT A MEISSNER EFFECT AT ALL- LEVITATING SAMPLES ARE FLOATING PERPENDICULAR TO THE MAGNETIC FIELD, WHILE THE MAGNETIC FIELD IS TANGENTIAL TO THE SURFACE OF THE SUPERCONDUCTOR IN THE MEISSNER EFFECT. THE FLOATING IN MAGNETIC FIELD FROGS MAKE LEVITATION NOT intrinsic reaction to the magnetic field and not RELIABLE SUPERCONDUCTIVITY TEST AT ALL -see HyperPhysics-? for a wrong explanation. To avoid more confusions here is the proof: Assume that a sample has rather high first critical magnetic field Hc1. The magnetic field will not be able to penetrate it. It creates a system of surface currents determined by the shape and size of the sample and creates a "shield" blocking the penetration of the magnetic field. Let the sample be left on a thin horizontal sheet insensitive to the magnetic field. Let the sample be small and spherical to avoid complications related to the size and shape of the object. Assume the magnetic field to be homogeneous. In this conditions the force acting on the sphere will be the same as the one created by the attraction of the sphere and its image below the sample, but with opposite direction of the surface currents induced in the real sample. In effect the two-the object and its image will attract each other. The result is that the Meissner effect can be described as attraction between the sphere and its image and this attraction will hold it vertical, parallel to the magnetic field but not lifted by it and there will be no high levitation in the conditions described here. In fact the sphere will be in the air, ( if it is not made of heavy elements like Osmium-Os-density 22.6 g/cc) but still attached to the surface. Оf course a sphere will not show any change in its position in this conditions, but a thin disk will be upright and that is shown in our video. A sphere on a real magnet will tend to stay on the edge as all various samples do in our pictures.
The next question is: What is shown in the video here-is it superconductivity or some other magnetic field induced effects? Such effects are excluded by the absence of any residual magnetization.
Certainly, one can't fool Nature. So the phase transition shown below in the video demonstrates a very high temperature dia-magnetic transition to superconductivity as good as the 100 C is the boiling point of the water in normal conditions.
HEATING THE SAMPLE WITH A TORCH MAKES IT TO FALL DOWN LOOSING ITS SURFACE SUPER-CURRENTS. AFTER BEING COOLED TO BLACK COLOR IT JUMPS UP DUE TO THE INDUCED AGAIN SUPER-CURRENTS. The observers will certainly notice the pretty strong overheating. One reason for it can be related to the fact that the heating is starting from the top and the bottom stays dark until it falls down. Another thermal effect is the evaporation from the hot surface. Besides, even a small grain of this superconductor has a moment strong enough to pull it upright.
Rule of the thumb is that if a material is substantially better conducting than copper then it is a superconductor. In the video below are shown a black superconductor tape ( a layer of about 10 microns = 0.4 mil thickness) on a copper tape both of about 40 microns thickness - (1.575 mil ) and about 1/2 inch wide). A different pure copper tape of the same total length, width and thickness of 40 microns is connected in series with the superconducting tape. Both are passing a 137 A current (technical current density~7000A/cm^2). Shortly the copper tape is blown up and photographs of the set up and the tapes are shown after the blow up.
My 1985 paper is posted only to show that one early work, not distributed broadly, was proven many years later to be correct ( In 2001 an independent group published the same idea and calculations in PR B and there were many articles on the same subject after that).
*In our old Lab there is still Os 4-oxide,which is an interesting compound used in the Quantum Mechanics as example to describe vibrations classification.
References: Manuscript.-arXiv:1603.01482v1 [cond-mat-supr-con] 4 Mar 2016.
Ivan Kostadinov,
373K Superconductors.com. Private Research Institute.
http://www.reddit.com/r/Physics_AWT/comments/6y3i9j/phase_transition_of_alleged_room_temperature.

1603.01482-the_373_paper-as_appeared_on_march_07_in_the_cond-mat_-later_being_transfered_to_physics.pdf
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field_theory_of_localization_ahd_supercohductivity-1985.pdf
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video- Dominika Radeva