Recently, considerable research efforts are focused on the sensorless Induction Motors (IM) control problem. We refer the reader to [12] for a tutorial account on the topic. Indeed, industries concerned by sensorless IM drives are continuously seeking for cost reductions in their products. The main drawback of IM is the mechanical sensor. The use of such direct speed sensor induces additional e...

Since the very beginning of position feedback control, the industries wish has been to rapidly obtain a position signal with the highest possible precision, and this of course for a reasonable price. For accurate angle and position measurements optical encoders have shown to best meet these needs. An improved method for fast and high resolution synchronous evaluation of optical encoders with si...

The quality of water in different usages especially drinking water has an important role on human health. As increasing the urban population and developing the industries, the releasing different materials into water cause various pollutions and problems for human cycles. The important goal of the present study is analyzing the mercury existence and pollution on different part of urban built en...

Background and purpose: Many workers are exposed to workplace hazards. Many occupational diseases are preventable by personal protective devices (PPDs). Though many workers do not use PPDs or their protection by PPDs is not sufficient. This study was designed to assess the quality of PPDs usage among industrial workers. Materials and Methods: In a cross-sectional study, 648 workers from four ma...

background: noise pollution can contribute to adverse health effects in humans. noise annoyance and related problems, caused by noise emission during the progress of building construction, have become increasingly important. these problems can influence the exposed workers, as well as vicinity residents. the goal of the present study was to assess the noise annoyance due to noise from construct...

We discuss when and why custom multi-factor risk models are warranted and give source code for computing some risk factors. Pension/mutual funds do not require customization but standardization. However, using standardized risk models in quant trading with much shorter holding horizons is suboptimal: (1) longer horizon risk factors (value, growth, etc.) increase noise trades and trading costs; ...