Cover (algebra)

About: Cover (algebra) is a research topic. Over the lifetime, 34945 publications have been published within this topic receiving 167307 citations.

Tool member cover and cover deployment device

Abstract: A surgical instrument including a tool member cover and a cover deployment device are disclosed. The cover is supported adjacent to or on the tool assembly of the surgical instrument and is movable from a first position in which the tool assembly is uncovered to a second position in which the tool assembly is at least partially encompassed by the cover. The deployment device is provided for moving the cover from the first position to the second position.

The mathematical theory of L systems

Abstract: The paper gives a survey of the different areas of the theory of developmental systems and languages. It is organized in such a way that it discusses typical results obtained in each particular problem area. The results quoted may not always be the most important ones but they are quite representative for the direction of research in this theory. Proofs are not given and, consequently, the basic techniques for solving problems in this theory are not discussed. An attempt has been made to cover also the most recent results. Most of the results have not yet appeared in print. To appear in J. Tou (ed. ), Advances in Information Systems Science, Plenum Press.

Video camera cover

Abstract: Expendable video camera cover for medical use comprises a sleeve-shaped cover means shaped such as to cover a video camera and its electrical cable, and rigid ring-shaped case means for holding the cover means therein. The case has a generally U-shaped cross-section with its outer and lateral sides closed and leaving a central hole open, and the cover means is contained in said case in a tightly packed state resulting from the cover means having, first, one of its ends fixedly attached to said case, and second, the rest of the cover means being gradually crushed against the outer and lateral sides of the case means such as to leave a central hole in the cover means in its packed state, and leaving the second end of the cover means free. A process for manufacturing a video camera cover comprises the steps of attaching one side of a sleeve-shaped cover means to a rigid case; inserting the rigid case with one end of the cover means attached thereon to a pole mounted on a base, so that the cover means can be inserted into the case; and gradually crushing said cover means into that case.