The extensive use of oestrogen for contraception and amelioration of post-menopausal symptoms has made it the subject of substantial recent research efforts, and ovariectomized (ovx) rats treated with exogenous ovarial hormones are important when investigating the effects and mechanisms of oestrogen actions. The crucial need to control and monitor plasma levels of 17beta-oestradiol calls for ac...

in modern endodontics, vital pulp therapy (vpt) has been considered an ultra-conservative treatment modality. based on the level of pulp preservation, vpt includes stepwise excavation, indirect pulp capping (idpc), direct pulp capping (dpc), miniature pulpotomy (mp), partial/cvek pulpotomy and coronal/complete pulpotomy (cp). the present article reviews the treatment outcomes of 94 permanent te...

Advances in silicon processing technology have made CMOS power amplifiers a feasible option for wireless communication applications. Compared to the compoundsemiconductor counterparts, CMOS PAs become increasingly attractive due to their lower cost and higher level of integration. The continued scaling of CMOS technology further extends the cut-off frequency of CMOS devices up to several hundre...

The integration of wind turbines (WTs) in variable speed drive systems belongs to the main factors causing low stability electrical networks. Therefore, order avoid this issue, WTs hybridization with a storage system is mandatory. This paper investigates WT operating at speed. contains permanent magnet synchronous generator (PMSG) supported by battery (BSS). To enhance quality active and reacti...

i ntroduction: the aim of this study was to evaluate the clinical and histological status of the pulp in sound human premolars after direct pulp capping (dpc) with four different dpc methods/materials. methods and materials: this study was conducted on eight volunteers who had to extract four first premolars due to orthodontic treatment. subsequent to tooth isolation, standardized class i occlu...

this paper proposes an optimal power flow (opf) algorithm by direct load control (dlc) programs to optimize the operational cost of smart grids considering various scenarios based on different constraints. the cost function includes active power production cost of available power sources and a novel flexible load curtailment cost associated with dlc programs. the load curtailment cost is based ...

This paper proposes the virtual flux based direct power control for Vienna rectifier. No need for the input voltage sensors, the current regulation loop and PWM voltage modulation block along with the active and reactive power decoupling are some of the salient advantages of this method that make it suitable for controlling the conventional active rectifiers. However, due to the three-level nat...

A novel voltage-modulated direct power control (VM-DPC) is first designed for a back-to-back (BTB) converter in the doubly fed induction generator (DFIG) system. The proposed VM-DPC built stator stationary reference frame (??). method uses simple feed-forward and feedback structure without phase-locked loop Park transformation. Therefore, it can be easily implemented BTB converter. Another esse...