A bstract The naive double-copy of (multi) loop amplitudes involving massive matter coupled to gauge theories will generically produce in a gravitational theory that contains additional contributions from propagating antisymmetric tensor and dilaton states even at tree-level. We present graph-based approach combines the method maximal cuts with construction offer systematic framework isolate pu...

In their seminal paper, Gangl, Kaneko and Zagier defined a double Eisenstein series and used it to study the relations between double zeta values. One of their key ideas is to study the formal double space and apply the double shuffle relations. They also proved the double shuffle relations for the double Eisenstein series. More recently, Kaneko and Tasaka extended the double Eisenstein series ...

background: noise is one of the most important harmful agents in work environment. noise pollution in oil refinery industries is related to workers' health. this study aimed to determine the overall noise pollution of an oil refinery operation and its frequency analysis to determine the control plan for a vent noise in these industries. methods: this experimental study performed in control unit...

‎an  oriented perfect path double cover (oppdc) of a‎ ‎graph $g$ is a collection of directed paths in the symmetric‎ ‎orientation $g_s$ of‎ ‎$g$ such that‎ ‎each arc‎ ‎of $g_s$ lies in exactly one of the paths and each‎ ‎vertex of $g$ appears just once as a beginning and just once as an‎ ‎end of a path‎. ‎maxov{'a} and ne{v{s}}et{v{r}}il (discrete‎ ‎math‎. ‎276 (2004) 287-294) conjectured that ...

This paper introduces a novel converter topology based on an independent controlled double-boost configuration. The structure was achieved by combining two classic boost converters connected in parallel at the input and series output. Through proper control of converters, interleaved obtained, which presents low ripple for current. Being output, three-level attained with twice voltage gain topo...