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Aerospace Systems Cary R. Spitzer Daniel a. martinec 102. 1 Avionics Systems Cornelius T Leondes University of California, San Diego Software in Avionics.CNS/ATM. Navigation Equipment Emphasis on Communications.Impact of \Free Flight Abdul Hamid Rana

Introduction Continues the discussion of middleware (i.e., tools and libraries programmers used to construct client-server software) Y Introduces the remote procedure call (RPC) concept, and describes a particular implementation of an rpc that uses XDr standard for data representation

Introduction Loosely specified protocol software interface Interface functionality Conceptual interface specification · System calls Two basic approaches to network communication Basic I/ functions in Linux

Chapter 4: Server Software Design Chapter goal: algorithm and issues terative servers Concurrent connection-oriented servers Singly-threaded,concurrent servers Multiprotocol servers Multiservice servers Uniform efficient management

Chapter 3: Client Software Design Chapter goal: Algorithm and issues Concurrency in client Client examples Learning algorithm instead of details

A Testing EXercise (From Glenford Myers: The Art of Software Testing A program reads three integer values from a card. The three values are interpreted as representing the lengths of the sides of a triangle. The program prints a message that states whether the triangle is scalene iso

Abstract Model Specifications Build an abstract model of required software behavior using mathematically defined(perhaps using axioms )types(e. g sets, relations) Define operations by showing effects of that operation on the model Specification includes Model

Too complex for complete analysis Separation into non-interacting subsystems distorts the results The most important properties are emergent Too organized for statistics Too much underlying structure that distorts the statistics Organized Complexity\(Weinberg) Copyright Nancy Leveson, Sept 1999

Introduction (chapter objectives) Complex envelopes and modulated signals Spectra of bandpass signals Nonlinear distortion · Communication circuits(mixers, phase- locked loops, frequency synthesizers, and detectors) Transmitters and receivers · Software radios