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By Ivan Kharkevich

Leningrad artist Ivan Kharkevich's entrance Album is a different old and creative rfile of the second one international battle. Kharkevich has accrued an important examples of the crimson Army's "weapon of counterpropaganda" - his drawings and photomontages for newspapers, leaflets and different Agitprop, together with prints and drafts of diverse anti-war propaganda posters from 1941-1945. The compilation is the 1st replica of Kharkevich's wartime art in one paintings. The e-book opens with a quick memoir Kharkevich wrote in Nineteen Seventies describing his battle years.

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1. Background The problem of supporting the electromagnetic forces acting on the windings has becomes a limiting factor in the design of large high field superconducting magnets and has attracted much attention in work on superconducting motors and generators. The three important aspects to be considered are: (i) (ii) (iii) the effect of tensile stress on the performance of superconducting materials and composites; the calculation of the forces appearing on the windings of magnets; the experimental verification of these calculations.

This ‘generated’ force acts in fact only on the superconducting portion of a composite superconductor, since this alone is carrying current. It is possible that when the stresses are high the superconductor may cut through the copper, but we assume for the present purpose that this does not occur. If the bond between the superconductor and copper is rigid, then some of the stress will be transmitted to the copper as the two materials must strain by the same amount, and in this case the stresses in the two materials will be in proportion to their Young’s moduli.

10) Case Study A2 30 T = 14 J ( B1 + B2 )(r1 + r2 ) . 11) is simple to use as B1 and B2 can be obtained from curves plotting these factors as a function of the winding configuration. 11) give the tensile stress with decreasing accuracy. 3 VALIDITY OF THE EQUATIONS Because of the drastic simplifications made in the above calculations, the expressions obtained must be applied with caution. It would appear that they are least inaccurate for the case of a ‘pancake’ winding in the mid-plane of a solenoid wound without interlayer spacers with a conductor of large cross-section.

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