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DSA are a result of B cell and plasma cell activation and bind to HLA and/or non-HLA molecules on the endothelium [1] of the graft. They were first described in 1969 by Patel et al., who found that Transplant recipients who were positively tested for DSA using a complement-dependent cytotoxicity crossmatch assay had a higher risk of transplant ...
Directed self-assembly (DSA) is a type of directed assembly which utilizes block co-polymer morphology to create lines, space and hole patterns, facilitating for a more accurate control of the feature shapes. Then it uses surface interactions as well as polymer thermodynamics to finalize the formation of the final pattern shapes. [1]
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 ...
The number of masks used for sidewall spacer patterning may be reduced with the use of directed self-assembly (DSA) due to the provision of gridded cuts all at once within a printed area, which can then be selected with a final exposure. [68] [64] Alternatively, the cut pattern itself may be generated as a DSA step. [69]
Placement testing is a practice that many colleges and universities use to assess college readiness and determine which classes a student should initially take. Since most two-year colleges have open, non-competitive admissions policies, many students are admitted without college-level academic qualifications.
Dynamic strain aging (DSA) for materials science is an instability in plastic flow of materials, associated with interaction between moving dislocations and diffusing solutes. Although sometimes dynamic strain aging is used interchangeably with the Portevin–Le Chatelier effect (or serrated yielding), dynamic strain aging refers specifically ...
The OPT replaced the now retired Quick Placement Test, a CD-ROM test provided in partnership with Cambridge English. The success of the Oxford Placement Test led to the design of the Oxford Test of English , and online computer-adaptive English Proficiency test, used as proof of English ability for university entry and employment.
In the computer-based test, results are available instantly as soon as the test is completed. [1] In the paper-based test, the institution scores the test using the provided scoring template. Institutions can administer the test, calculate scores and report back to test takers within one day. Test-takers receive a total score between 0–80.