There are many situations in which social interactions and emerging social phenomena play important and, sometimes, fundamental roles. In our particular case we are studying networks of small to medium enterprises. In these enterprise networks each individual enterprise keeps its own identity but works in close collaboration with the others in order to produce something that the enterprises wor...

Background: Rates of caesarean section are progressively increasing in many parts of the world. As a result of psychosocial factors, there has been an increasing tendency for pregnant women without justifiable medical indications for caesarean section to ask for this procedure in China. The psychosocial factors for requesting cesarean section were analyzed in our study. Methods: A self-made que...

In the paper an interesting application of fuzzy approach is presented. The problem of stability analysis of uncertain linear systems with coefficients described by fuzzy functions is studied. Each coefficient is considered as a variable interval parametrized by the degree of confidence in validity of the corresponding model. The higher the confidence level is the smaller is the interval in whi...

in this paper, it was shown that , where  and , and , where  is not prime and , are od-characterizable.

let $g$ be a connected graph with vertex set $v(g)$‎. ‎the‎ ‎degree resistance distance of $g$ is defined as $d_r(g) = sum_{{u‎,‎v} subseteq v(g)} [d(u)+d(v)] r(u,v)$‎, ‎where $d(u)$ is the degree‎ ‎of vertex $u$‎, ‎and $r(u,v)$ denotes the resistance distance between‎ ‎$u$ and $v$‎. ‎in this paper‎, ‎we characterize $n$-vertex unicyclic‎ ‎graphs having minimum and second minimum degree resista...