New PDF release: An optimal selection of induction heater capacitance

By Lee J.

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Raw materials such as timber were harvested from nearby forests. Design plans from previous sieges were used to manufacture weapons. The ammunition for the siege weapons were also gathered locally. Common catapult payloads included rocks or boulders, diseased livestock, flaming bundles of wood, and rotten food. Less common, but equally effective payloads included beehives and even excrement. These in particular had the advantage of introducing a psychological demoralizing aspect to the castle defenders.

The primary form of transportation was based on horses and other beasts of burden such as oxen. The horses and oxen presented logistical difficulties themselves. On the one hand, oxen could transport more supplies per animal than horses. On the other hand, oxen were very slow in comparison to horses. The longer it took to reach the destination, the more food and water was required for the oxens’ own use. The use of horses may deliver the supplies faster, but this was at a cost of having to feed more horses for the same amount of delivered supplies.

Although primarily oar powered by slaves, some galleys did utilize sails when the wind was coming from a favorable direction. However, given the downwind level of sailing technology during this period, this was probably a very small percentage of the time. During Alexander’s reign, galleys were primarily used for transportation and supply. This included men, beasts of burden, food supplies, and weapons. There are some references to the use of galleys for mounted weapons of the time; however, it was not until the eighteenth century that sailing vessels were commonly armed with cannons and used as warships.

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An optimal selection of induction heater capacitance considering dissipation loss caused by ESR by Lee J.


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