This paper is based on the design and analysis of Total Harmonic Distortion(THD) and power factor for Compact Fluorescent Lamp. In the proposed electronic ballast Buck Boost converter operates in the continuous conduction mode, which provides a constant DC voltage to drive the lamp.By choosing the switching frequency more than the resonant frequency the zero voltage switching is achieved in res...

This digest presents the study, design and implementation of an electronic ballast for high-pressure sodium lamp. The main feature is the capacity to detect and avoid the phenomenon known as acoustic resonance. Several techniques are discussed to solve the problems related to resonance acoustic detection, what take to real time system solution chosen. Besides this, a high efficiency prototype i...

The depths from 10 to 30 m are usually not considered narcotic in scuba air-diving, and evidence of psychomotor disturbances attributable to nitrogen narcosis at these depths is weak and contradictory. 15 experienced male divers were tested in a chamber at 1, 2, 3, and 4 bars over five consecutive days using a battery of computer generated psychological tests-Computerized Reactionmeter Drenovac...

This paper presents an off-line integrated full ballast to supply a 35 W assembly of Power LEDs. The proposed solution integrates an input PFC stage (a flyback converter operating in DCM) and a DC-DC output converter (a buck converter) into a single switch power stage, operating with peak current control. As it will be shown, this control scheme maintains the current through the load constant, ...

The objective of this study is to improve the heating value of gas produced during gasification of biomass fuels using an indirectly heated gasifier based on latent heat ballasting. The latent heat ballast consists of lithium fluoride salt encased in tubes suspended in the reactor. The lithium fluoride has a melting point that is near the desired gasification temperature. With the ballast a sin...

• A novel lattice model to capture nonlinear ballast behaviour is developed The included in a 2D railway track with transition zone Ballast compaction on its own cannot cause progressive deterioration of the Locations tracks where significant variations properties occur are subject increased deterioration. To successfully mitigate this, mechanisms leading need be understood. this end, work pres...

Approximately three million years ago the Isthmus of Panama formed an impenetrable land barrier between the tropical eastern Pacific Ocean and the tropical western Atlantic Ocean. Since this time, isolated geminate species have evolved from once contiguous populations, either side of the barrier. One such organism whose distribution is divided by the Isthmus is the tropical brittlestar Ophiacti...

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