We study the potential between a static center monopole and antimonopole in 4d SU(2) Yang–Mills theory. Using a new numerical method, we show that the ’t Hooft loop is a dual order parameter with respect to the Wilson loop, for the deconfinement phase transition. We observe a 3d Ising–like critical behaviour for the dual string tension related to the spatial ’t Hooft loop as a function of the t...

Let $A_1$, $A_2$ be unital Banach algebras and $X$ be an $A_1$-$A_2$- module. Applying the concept of module maps, (inner) modulegeneralized derivations and  generalized first cohomology groups, wepresent several results concerning the relations between modulegeneralized derivations from $A_i$ into the dual space $A^*_i$ (for$i=1,2$) and such derivations  from  the triangular Banach algebraof t...

An ultra-wideband (UWB) antenna with dual band-notched characteristics is proposed in this letter. The fabricated prototype of the has a compact size 30 × 24 mm which operates at 3 to 14 GHz and attained notch-bands 3.3 3.7 5.15 5.825 GHz. result shows that compact, easy fabricate provides good radiation patterns time-domain behaviours. simulated measured results displayed agreement over entire...

Using a U -duality symmetry of type II compactification on T 4 represented by triality action on the T -duality group, and applying the adiabatic argument we construct dual pairs of type II compactifications in lower dimensions. The simplicity of this construction makes it an ideal set up for testing various conjectures about string dualities. In some of these models the type II string has a pe...