Let $alpha$ be an endomorphism and $delta$ an $alpha$-derivationof a ring $R$.  In this paper we  study the relationship between an$R$-module $M_R$ and the  general polynomial module  $M[x]$ over theskew polynomial ring $R[x;alpha,delta]$. We introduce the notionsof skew-Armendariz modules and skew quasi-Armendariz modules whichare generalizations of $alpha$-Armendariz modules and extend thecla...

The paper uses a new approach to investigate prime submodules and minimal prime submodules of certain modules such as Artinian and torsion modules. In particular, we introduce a concrete formula for the radical of submodules of Artinian modules.

When a railway pantograph interacts with catenary during the movement of rail vehicle, several physical phenomena, both mechanical and electrical, occur in system. These phenomena affect quality power supply train from traction devices. The unfavourable arcing occurring when there are disturbances contact between pantograph’s slider wire. In turn, it results energy loss increased wear component...

Steel lazy wave riser (SLWR) is derived from the simple catenary (SCR) by installation of buoyancy modules on its section. Infinite SLWR configurations are possible, and this poses difficulties in determining best configuration. However, it possible to capture some suitable which satisfy given design criteria specific a project. We referred these as optimum for problem. Several advanced optimiz...

Katener sistemi hesaplamalarında girdileri oluşturan coğrafi ve iklimsel değişkenlerin kontrolü elimizde değildir. Ancak doğru hesaplamalar sonucu elde edilecek bulgular ile sistemin daha güvenli konforlu çalışmasını mümkün kılmak elimizdedir. Çevresel koşulların katener üzerindeki etkisi iyi bir şekilde incelenmesi takdirde olası arızalarını önleme, maliyet analizi yapabilme tasarım imkanların...

Pantograph-catenary system provides electric energy for the subway lines; its health status is essential to serviceability of vehicle. In this study, a real-time structural monitoring method based on strain response inversion proposed calculate magnitude and position dynamic contact force between catenary pantograph. The measurement principle, calibration, installation detail fiber Bragg gratin...