this study examined the phonetic characteristics of persian sentence stress produced by native mandarin chinese speakers. we compared the phonetic correlates of sentence stress, namely fundamental frequency (f0), vowel duration, and vowel intensity in the production of 8 mandarin chinese speakers and 8 native persian speakers. results indicated that mandarin chinese speakers of persian could di...

A finitely generated group $\Gamma$ is called strongly scale-invariant if there exists an injective endomorphism $\varphi: \Gamma \to \Gamma$ with the image $\varphi(\Gamma)$ of finite index in and subgroup $\bigcap\_{n>0}\varphi^n(\Gamma)$ finite. The only known examples such groups are virtually nilpotent, or equivalently, all have polynomial growth. question by Nekrashevych Pete asks whether...

We show that the epimorphism problem is solvable for targets are virtually cyclic or a product of an Abelian group and finite group.

Stability analysis methodologies tailored for positive linear systems have been generalized to cooperative nonlinear systems. However, some network systems, such as epidemic dynamics characterized by susceptible–infected–susceptible models, are not cooperative. To apply the tools originally developed this class of non-cooperative in paper, we propose concept virtual positivity a generalization ...

We show that the geodesic growth function of any finitely generated virtually abelian group is either polynomial or exponential; and series holonomic, rational in case. In addition, we language geodesics blind multicounter.