Circle diagram Circle diagram First conceived by A. Heyland in 1894 and B.A. Behrend in 1895, the circle diagram is the graphical representation of the performance of the electrical machine drawn in terms of the locus of the machine's input voltage and current. The circle diagram can be drawn for alternators, synchronous motors, transformers, induction motors. The Heyland diagram is an approximate representation of circle diagram applied to induction motors, which assumes that stator input voltage, rotor resistance and rotor reactance are constant and stator resistance and core loss are zero. Another common circle diagram form is as described in the two
A Letter for Tomorrow adds "detecting unpersuasive or implausible claims in Khatami’s statement is not difficult. Among other things, the statement replicated a confusion regarding the notions of "government" () and "the state" (), which in Persian are usually rendered interchangeably. The state as the institutional embodiment of indivisible sovereignty was not headed by Khatami; though notionally the president, he merely acted as the head of an institutionally fragile executive whose authority was ill defined and in practice heavily circumscribed". and "The structural constraints that Khatami faced cannot be underestimated." A Letter for Tomorrow A Letter for Tomorrow (; also translated "Letter for the