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Digital subtraction angiography (DSA) is a fluoroscopy technique used in interventional radiology to clearly visualize blood vessels in a bony or dense soft tissue environment. Images are produced using contrast medium by subtracting a "pre-contrast image" or mask from subsequent images, once the contrast medium has been introduced into a ...
A sparse matrix obtained when solving a finite element problem in two dimensions. The non-zero elements are shown in black. In numerical analysis and scientific computing, a sparse matrix or sparse array is a matrix in which most of the elements are zero. [1]
The Digital Signature Algorithm (DSA) is a public-key cryptosystem and Federal Information Processing Standard for digital signatures, based on the mathematical concept of modular exponentiation and the discrete logarithm problem. In a public-key cryptosystem, a pair of private and public keys are created: data encrypted with either key can ...
Parameter; CURVE: the elliptic curve field and equation used G: elliptic curve base point, a point on the curve that generates a subgroup of large prime order n: n: integer order of G, means that =, where is the identity element.
Targets for DSA are therefore usually set quite high and the calculation and review of the metric important. Some organizations experience problems in producing delivery schedule adherence information this can be caused by a failure of systems to record delivery forecast information, unreliable processes and poor communication between buyer and ...
A Directory System Agent (DSA) is the element of an X.500 directory service that provides User Agents with access to a portion of the directory (usually the portion associated with a single Organizational Unit).
GIFT allows someone to use a text editor to write multiple-choice, true-false, short answer, matching, missing word and numerical questions in a simple format that can be imported to a computer-based quizzes. The content is an UTF-8-encoded text file. Example:
A PDF file is organized using ASCII characters, except for certain elements that may have binary content. The file starts with a header containing a magic number (as a readable string) and the version of the format, for example %PDF-1.7. The format is a subset of a COS ("Carousel" Object Structure) format. [24]