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In computer science, software transactional memory (STM) is a concurrency control mechanism analogous to database transactions for controlling access to shared memory in concurrent computing. It is an alternative to lock-based synchronization. STM is a strategy implemented in software, rather than as a hardware component.
In cognitive psychology, Brown–Peterson task (or Brown–Peterson procedure) refers to a cognitive exercise designed to test the limits of working memory duration. The task is named for two notable experiments published in the 1950s in which it was first documented, the first by John Brown [1] and the second by husband-and-wife team Lloyd and Margaret Peterson.
When caches are used, the system may introduce the risk of false conflicts due to the use of cache line granularity. [3] Load-link/store-conditional (LL/SC) offered by many RISC processors can be viewed as the most basic transactional memory support; however, LL/SC usually operates on data that is the size of a native machine word, so only ...
Applications of SP-STM [ edit ] The spin polarized scanning tunneling microscope is a versatile instrument which has gained tremendous attention due to its enhanced surface sensitivity and lateral resolution up to atomic scale, and can be used as an important tool to study ferromagnetic materials, such as dysprosium (Dy), quasi-2D thin films ...
For example, children have been shown to remember specific "sweet" tastes during incidental learning trials but the nature of this gustatory store is still unclear. [3] However, sensory memories might be related to a region of the thalamus , which serves as a source of signals encoding past experiences in the neocortex .
Delos Wickens discovered that proactive interference build-up is released when there is a change to the category of items being learned, leading to increased processing in STM. [9] Presenting new skills later in practice can considerably reduce proactive interference desirable for participants to have the best opportunity to encode fresh new ...
A 1986 STM from the collection of Musée d'histoire des sciences de la Ville de Genève A large STM setup at the London Centre for Nanotechnology The main components of a scanning tunneling microscope are the scanning tip, piezoelectrically controlled height ( z axis) and lateral ( x and y axes) scanner, and coarse sample-to-tip approach mechanism.
In a backward digit span task, the procedure is largely the same, except that subjects being tested are asked to recall the digits in backward order (e.g., if presented with the following string of numbers "1 5 9 2 3," the subject would be asked to recall the digits in reverse order; in the case, the correct response would be "3 2 9 5 1").