Hives on dark skin. Hives are a skin reaction that causes red or white itchy welts. The welts vary in size and appear and fade repeatedly as the reaction runs its course. Chronic hives are a condition in which the welts last more than six weeks or recur over months or years.Chronic hives usually aren't life-threatening. But the condition can be very uncomfortable and interfere with sleep and daily activities. Often, the cause of chronic hives is not clear.In some cases, chronic hives are a sign of an underlying health problem, such as thyroid disease or lupus. You can try various treatments to relieve your symptoms. For many people, antihistamine and anti-itch medications provide relief from chronic hives.hronic hives are a condition in which the welts last more than six weeks or recur over months or years. Chronic hives usually aren't life-threatening. But the condition can be very uncomfortable and interfere with sleep and daily activities. Often, the cause of chronic hives is not clear.
longitudinal magnetization. 1  of a material or medium in a manner in which the magnetic flux is essentially parallel to the long axis of the influencing field. 2  In magnetic recording, 3  of a material or medium essentially in the same direction as the material or medium is traveling.
Essentially, you are recording on a magnetic material, where bits (a collection of magnetized particles) are laid out end-to-end. Longitudinal recording is the actual method of how the bits are recorded on disk platters.The direction of this magnetic charge is horizontal to the media, meaning the north and south poles of the magnetized particles are lined parallel to the surface of the disk.he mechanism that reads and writes data on a hard disk. longitudinal recording Longitudinal recording aligns data bits horizontally in relation to the drive's spinning platter, parallel to the surface of the disk. perpendicular recording. Perpendicular recording aligns data bits vertically. perpendicular to the disk.