Generalizing previous models of hypergraph coloring — due to Voloshin, Drgas-Burchardt and Lazuka, and the present authors – in this paper we introduce and study the structure class that we call stably bounded hypergraphs. In this model, a hypergraph is viewed as a six-tuple H = (X, E , s, t,a, b), where s, t,a, b : E → N are given integer-valued functions on the edge set. A mapping φ : X → N i...

potential fields are due to complex distribution of sources related to susceptibility and mass density variations for magnetic and gravity field respectively. in researching the lateral heterogeneous of different geological bodies, in particular their edge location potential field has some advantages. we mainly refer to linear features such as fault, folding axis, dyke, trend and border of the ...

background: because of the adverse effects of ionizing radiation on fetuses, prior to radiotherapy of pregnant patients, fetal dose should be estimated. fetal dose has been studied by several authors in different depths in phantoms with various abdomen thicknesses (at). in this study, the effect of maternal at and depth in fetal dosimetry was investigated, using peripheral dose (pd) distributio...

the micro milling operation is one of the manufacturing processes, which can produce 3d parts in the range of less than a millimetre. miniaturization of components results in increasing the ratio of surface area to volume of components, which in turn increases the role of surface on the component performance. therefore, anticipating the relationship between micro milling parameters and surface ...