COMP212 Computer Organization and Systems Tutorial/Lab #4 Problems about Cache Memory 4.2 A two-way set associative cache has lines of 16 bytes and a total size of 8 bytes. The 64-Mbyte main memory is byte-addressable. Show the format of main memory address. Kb => 1‚024 Mb => 1024 * 1024 Ans. A two-way set => 2 lines / set in the cache; The cache has lines of 16 bytes and a total size of 8K bytes => There are a total of 8K bytes/16 bytes = 512 lines (23*210/24) in the cache;
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The Working Memory Model (WMM) is a theory by Baddeley and Hitch in 1974. The theory replaces the idea that there is a single Short Term Memory (STM) from Atkinson and Shiffrin (1968)‚ it suggests that the STM is a flexible multi-component system. The WMM suggests that the STM is controlled by the Central Executive (CE) which controls attention‚ planning and synthesising information. The Central Executive is a flexible system which means it can process audio‚ visual and sound information‚ it also
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Long-Term Memory Short-term memory differs from long-term memory in two fundamental ways‚ with only short-term memory demonstrating temporal decay and capacity limits. Long-term memory however‚ can store vast amounts of information and is permanent. Short-term memory gives the ability for the human brain to keep information in the mind for a very short period of time‚ such as remembering a phone number long enough until you are able to dial it on our phones. The extent of short-term memory lasts within
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Abstract Fergus I. M. Craik and Michael J. Watkins conducted two experiments which oppose many widely accepted models of memory‚ stating that an items length of stay in short term storage (STS) has an effect on the item being transferred into long term storage (LTS). Previous researchers postulate the more an item is rehearsed in STM there is a better chance of the item being transferred into LTM‚ for recall later‚ this can explain the negative recency effect in free recall; items presented at
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the Working Memory Model The working memory model is a theory for how short-term memory works‚ and an expansion of the views expressed in the MSM theory. Baddeley and Hitch in 1974 felt that STM was not just one store but a collection of different stores. These concepts lead them to form a model which consists of three slave systems; the central executive‚ the phonological loop and the visuo-spatial sketchpad. They used the phrase ‘working memory’ to refer to the division of our memory that we utilize
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Outline and evaluate the working memory model (12 marks) Baddeley and Hitch proposed that memory has 4 components. The central executive‚ phonological loop‚ visuospatial sketchpad and the episodic buffer. The central executive decides how to share out and direct attention to incoming information. The phonological loop can be thought of as a maintenance rehearsal mechanism for retaining verbal information. It is sub-divided into two other components‚ the phonological store (inner ear)‚ which holds
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a theory of one cognitive process (e.g. memory‚ perception‚ language)‚ with reference to research studies (22)* The Multi Store Model of Memory (also known as the Atkinson and Shiffrin Model of Memory) is a simplified cognitive model of the memorial structure of the human mind. It was first proposed by Richards Atkinson and Shiffrin‚ in 1968. It was one of the first models of memory to show a clear and systematic approach to the store and retrieval of memory‚ and although now considered by many to
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In the book “The Memory Keeper’s Daughter” by Kim Edwards a doctor and his wife have twins and the first child is a healthy boy but then the second child that comes out is a little girl with the signs of down syndrome and he asks his Nurse to take the baby away to an institution while he tells his wife the baby girl died. Through out the entire book it is a struggle for Dr. Henry’s wife Norah to have closure with the fact that her baby girl is said to be dead and she never saw her‚ held her‚ or cared
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com/locate/engstruct Applications of shape memory alloys in civil structures G. Song a‚∗ ‚ N. Ma a ‚ H.-N. Li b a Department of Mechanical Engineering‚ University of Houston‚ Houston‚ TX 77204‚ USA b School of Civil and Hydraulic Engineering‚ Dalian University of Technology‚ Dalian‚ 116024‚ China Received 24 June 2004; received in revised form 19 December 2005; accepted 26 December 2005 Available online 17 April 2006 Abstract Shape memory alloy (SMA) is a novel functional material and
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Dual process theory contends that thoughts and behaviors can be affected by top-down‚ controlled processes or bottom-up‚ automatic processes. The history of dual process theories can be linked back to William James (1890)‚ but were popularized in the 1970s and 1980s in the fields of social and cognitive psychology to explain attitudes‚ reasoning‚ and decision making (Barrett‚ Tugate‚ & Engle‚ 2004; Frankish & Evans‚ 2009). In some fields‚ dual process theories have become the source of spirited debate
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