The effect of an electromagnetic peening process on mumetal properties
Peening processes are widely used in the industries to enhance the performance of the most solicited parts of mechanical pieces. Actual processes, like shot peening and low plasticity burnishing, are quite limited to a small depth of treatment circa 1 mm at maximum. A new process is developed based on pulsed electromagnetic fields. This method allows a better depth of treatment up to 5 mm and it can be easily monitored. A prototype was developed using a pulse current generator and specifically designed inductor. This prototype was used on mumetal for the preliminary tests. Indeed, its maximal permeability and coercivity are highly impacted by the presence of stresses. Using specifics sensors, some changes occur after treatment on mumetal samples and can be observed.
High-current pulse generator for plasma focus
An electrical circuit is described and the construction of the high-current pulse generator is represented. The generator has the following parameters: output voltage is ∼ 20kV, current is ∼ 100kA, it operates in a nanosecond range of time (∼ 300ns), the pulse repetition rate is up to 10Hz in a continuous mode, and it is intended for plasma focus supply. The generator is based on the capacitive storage discharge through toroidal pulse transformer to electrodes of the plasma focus. A low-inductance multichannel spark-gap is used as a switch in the generator. The stored energy of the generator is ∼ 600J. The first results of the experimental operation of the generator with plasma focus are given.
Global Islamic Politics
1. Introduction to Islam and Islamic Revivals. 2. Islam: A Vehicle for Political Action. 3. The Muslim Fundamentalists. 4. The Muslim Traditionalists. 5. The Muslim Modernists. 6. The Muslim Pragmatists. 7. Failure of Secular Ideologies and Developmental Crises. 8. Islamic Revivalism in the Arab-Israeli Context. 9. OPEC, OIC, and Islamic Politics. 10. The Islamic Revolution in Iran. 11. Islamic Revival in Central Asia. 12. Conclusion. Glossary of Islamic Terms.