SWEN90004 Modelling Complex Software Systems Java threads; mutual exclusion Artem Polyvyanyy, Nic Geard Lecture Con.02 Semester 1, 2021 ©The University of Melbourne SWEN90004 (2021) Java threads; mutual exclusion 1 / 25 How is everyone doing? SWEN90004 (2021) Java threads; mutual exclusion 2 / 25 The mutual exclusion (Mutex) problem N processes (here, N = 2) […]
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SWEN90004 Modelling Complex Software Systems Semaphores; Java summary Artem Polyvyanyy, Nic Geard Lecture Con.04 Semester 1, 2021 ⃝c The University of Melbourne SWEN90004 (2021) Semaphores; Java summary 1 / 24 Java has lightweight monitors A lock is associated with every object. To execute a synchronized method, a process must first acquire the lock for that
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SWEN90004 Modelling Complex Software Systems Lecture Cx.07 Agent-Based Models I Artem Polyvyanyy, Nic Geard artem.polyvyanyy@unimelb.edu.au; nicholas.geard@unimelb.edu.au Semester 1, 2021 SLIDE 1 Introduction to agent-based models SLIDE 2 What is an “agent-based” model? Like cellular automata (CA), agent-based models (ABMs) are an approach to modelling complex systems that focuses on the components of the system and
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SWEN90004 Modelling Complex Software Systems Lecture Cx.01 Introduction to Complex Systems Artem Polyvyanyy, Nic Geard artem.polyvyanyy@unimelb.edu.au; nicholas.geard@unimelb.edu.au Semester 1, 2021 SLIDE 1 What are complex systems? SLIDE 2 What is a system? A set of things working together as parts of a mechanism or an interconnecting network; a complex whole Physiology: A set of
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SWEN90004 Modelling Complex Software Systems Model checking with temporal logic Artem Polyvyanyy, Nic Geard Lecture Con.10 Semester 1, 2021 ⃝c The University of Melbourne SWEN90004 (2021) Model checking with temporal logic 1 / 34 Introduction In lectures the last two lectures, we saw how to specify properties that hold true for every execution of a
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SWEN90004 Modelling Complex Software Systems Lecture Cx.09 Networks I: Theory and Models Artem Polyvyanyy, Nic Geard artem.polyvyanyy@unimelb.edu.au; nicholas.geard@unimelb.edu.au Semester 1, 2021 SLIDE 1 Objectives To understand how the structure of complex systems can be described in terms of the pattern of interaction between their components, and represented as a network. To describe the
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SWEN90004 Modelling Complex Software Systems Introduction Artem Polyvyanyy, Nic Geard Lecture Introduction Semester 1, 2021 ©The University of Melbourne SWEN90004 (2021) Introduction 1 / 14 Modelling Complex Software Systems What is a system? SWEN90004 (2021) Introduction 2 / 14 Modelling Complex Software Systems What is a software system? SWEN90004 (2021) Introduction 3 / 14 Modelling
SWEN90004 Modelling Complex Software Systems Lecture Cx.09 Networks I: Theory and Models Artem Polyvyanyy, Nic Geard artem.polyvyanyy@unimelb.edu.au; nicholas.geard@unimelb.edu.au Semester 1, 2021 1 / 36 Objectives To understand how the structure of complex systems can be described in terms of the pattern of interaction between their components, and represented as a network. To describe
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SWEN90004 Modelling Complex Software Systems Monitors and synchronization in Java Artem Polyvyanyy, Nic Geard Lecture Con.03 Semester 1, 2021 ⃝c The University of Melbourne SWEN90004 (2021) Monitors in Java 1 / 21 Synchronized methods and monitors Going through the mutex algorithms is a useful lesson, as it shows the various issues and pitfalls involved in
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SWEN90004 Modelling Complex Software Systems Lecture Con.12 Petri Nets I: Systems and Semantics Artem Polyvyanyy, Nic Geard artem.polyvyanyy@unimelb.edu.au; nicholas.geard@unimelb.edu.au Semester 1, 2021 1 / 25 Outline Introduction to Petri nets and elementary net systems Semantics of net systems 2 / 25 How it began It is generally not possible to predict how much space