PPT-A logic for true concurrency

Paolo Baldan and Silvia Crafa Universita di Padova Models of Concurrency a b ab ba a a b b Different causal properties Different distribution properties. Permission granted for photocopy reproduction. Please do not alter or modify contents. All rights reserved. 800-338-4065 www.loveandlogic.com Seminar: Transaction Processing (Bachelor). SS 2009. Dennis . Stratmann. Outline. Goal and Overview. Examine Three Approaches to CC on RD:. 1. Predicate-Oriented Concurrency Control. 2. Relational Update Transactions. Closure properties in modal logic. Closure properties in modal logic. Specific modal logics. Specific . modal logics are . specified . by giving . formula schemes. , which are then called axioms, and . Prof. O. Nierstrasz. Selected material © Magee and Kramer. © Oscar Nierstrasz. 2. Roadmap. Modelling Concurrency. Finite State Processes . Labelled Transition Systems. Java Threads. Thread creation. (True;fa;b;cg)(False;fa;b;cg)(False;fa;bg)(True;fa;bg)(False;fa;cg)(True;fb;cg)(True;fa;cg)(True;;)(False;;)(False;fb;cg)(True;fbg)(True;fcg)(False;fcg)(False;fbg)(False;fag)(True;fag)ModelFormulasBas Formula Condition Answer Comment '=b true true '=a true true doesnotdependonandistherefore false false vacuouslytrueiniffistrue '=a^b false false doesnotdependon true;btrue true dependson :' istrue fa Thinking. CCC8001. 2. nd. Term 2013. introduction. Course Particulars. Instructor: Dr. Michael Johnson. Office: Room HSH219, Ho Sin Hang Building. Office Hours: . Monday. s . 15:00 to . 16:00. Email: . We already know that the language of the machine is . binary. – that is, sequences of 1’s and 0’s. But why is this? . At the hardware level, computers are streams of signals. These signals only have two states of interest, high voltage and low voltage. . Learning Objectives. Know the three basic logic gate operators . Work out the output of given inputs using a truth table. All the instructions and data inside a computer are stored using binary. . Computer memory uses many small transistors and capacitors to store data. . Logic Gates. NOT (Inverter) Gate. AND Gate. OR Gate. NAND Gate. NOR Gate. XOR Gate. Digital Signals. Digital signals 0 (false) or 1 (true). Digital signal 1 is represented by a small voltage.. Digital signal 0 is represented by no voltage.. Learn what a logic gate is and what they are for.. Be able to identify common logic gates.. Understand how truth tables work.. What is a logic gate?. Logic gates are part of the circuits inside your computer. They can take several INPUTS. . Microchips (processors) . do exactly whatever instructions are fed into it, and that too without a single mistake.. Boolean . Logic was first introduced by George . Boole. The . basic . Boolean . operation can be further mapped into operations using bits and bytes. The most basic idea of Boolean Logic can be explained using logic gates. When the logic required becomes complex, these logic gates can be combined into more complex forms to get the required output. 1. Symbolic Logic Outline. Symbolic Logic Outline. What is Logic?. How Do We Use Logic?. Logical Inferences #1. Logical Inferences #2. Symbolic Logic #1. Symbolic Logic #2. What If a Premise is False? #1. Software & the Concurrency Revolution by Sutter & Larus ACM Queue Magazine, Sept. 2005 For CMPS 5433 - Halverson 1 In a Nutshell “The concurrency revolution is primarily a software revolution