The reliability improvement of the electricity distribution system is a recurring topic when it comes to the investments of an electric utility. Directly related to the response of the operations center, the maintenance ...

Due the increasing demand of electrical energy in the power electric system, the short-circuit level become larger each day, taking the equipment connected to the system to critical conditions. These conditions affect ...

Globalization causes changes in people's technology, society, culture and lifestyle, and supermarkets are constantly competing in this environment. Within the supply chain, there is an important component that if managed ...

This work presents the analysis and development of a new single-stage LED driver topology that integrates a boost bridgeless totem-pole converter operating as power factor correction (PFC) stage and a half-bridge LLC ...

With an increasing demand for electricity and the various concerns about the environment, increase of fossil fuels and energy security, increased the concern of producing energy from renewable sources. In 2002 was created ...

Water is a cornerstone to the flourishment of any existing life form and as such, need to be preserved. Working on development and improvement of technologies which promote an efficient effluent treatment, preventing ...

In the urban environment, where the permeable areas are gradually occupied by impermeable spaces, natural hydrological processes are also subject to changes. These impermeable surfaces promote the increase of the surface ...

The financial area is important for the development of companies and countries, in need of improved investment techniques. The quest for profit in this market brings with it exposure to a certain level of risk that can be ...

Polyurethane foams (PU) may be used as the immobilization matrix for chitosan, in order to overcome/minimize the disadvantages with respect to chitosan as an adsorbent. However, the polyurethane and chitosan foams synthesized ...

The service management system performance is closely related to the operational success. When considering electric power distribution systems, regulatory polices impose penalties and minimum service levels which demand a ...