INTERNATIONAL LEGAL CONVENTIONS AS AN INSTRUMENT FOR PREVENTING ENVIRONMENTAL RISKS




Research on the operational performance of high speed permanent magnet generator with controlled rectifier in distributed generation

The uncontrolled rectifier and controlled rectifier which use fixed switching frequency control strategy are applied usually during the working of a high-power high- speed permanent magnet generator (HSPMG).Even for the controlled rectifier, it will generate harmonics.The electromagnetic performance of the HSPMG is also affected by these harmonics.

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Short Note: Comparison of three surveying techniques applied to hydrogeological studies: level, barometer, and GPS

The error from three different surveying techniques- level, hand-held barometer, and hand-held GPS-were compared in terms of accuracy and cost effectiveness for hydrogeological studies by surveying a four-kilometer Tableware circuit within the campus of the Universidad Nacional Autonoma de Mexico.The polygon was surveyed once with the level and the

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