Dieses Buch enthalt die Beitrage der 5. GI/ITG-Fachtagung uber Messung, Modellierung und Bewertung von Rechensystemen und Netzen, die im September 1989 in Braunschweig veranstaltet wurde. Inhalt dieser wichtigsten deutschen Tagung auf diesem Gebiet war der Austausch neuer Ideen und Erfahrungen bei der quantitativen Untersuchung von Rechensystemen und Netzen. Dabei wurde einerseits das volle methodische Spektrum - Messinstrumentierung/Messung - Modellbildung/simulative und mathematische Modellanalyse - Bewertung und Synthese in leistungsorientierter bzw. leistungs-/ zuverlassigkeitsorientierter Sicht abgedeckt sowie andererseits uber praktische Erfahrungen beim Einsatz dieser Methoden und Techniken bei Entwurf, Implementierung/Installierung und Betrieb einzelner und vernetzter Rechensysteme berichtet. Die Beitrage behandeln Methoden und Techniken der Beschreibung und Untersuchung von Systemen hinsichtlich ihrer Leistungsfahigkeit und Zuverlassigkeit, (Hard- und Software-) Mess- und Monitorsysteme, Charakterisierung von Systembelastungen, Erstellung und simulative mathematische/hybride Analyse von Systemmodellen sowie Erfahrungen bei der Bewertung und Optimierung von Rechensystemen und Netzen."

Seit 1986 trifft sich in Mannheim jahrlich auf Einladung des Vereins zur wissenschaftlichen Weiterbildung der Universitat Mannheim e.V. die deutschsprachige Supercomputergemeinde - Anwender, Betreiber, Hersteller - zu einem fruchtbaren Dialog und Erfahrungsaustausch. In dem diesjahrigen Seminar "Supercomputer - Anwendungen, Architekturen und Trends" werden die neuesten Entwicklungen dieses stark innovativen Gebiets unter einem sehr anwendungsbezogenen, praktischen Aspekt aufgearbeitet. Experten aus dem Inland sowie den nach wie vor fuhrenden Landern USA und Japan konnten auch bei dieser zum vierten Mal stattfindenden Veranstaltung zu Prasentationen gewonnen werden. Alle Beitrage zum Seminar sind in diesem Band enthalten. Insbesondere befassen sie sich mit folgenden Schwerpunkten: - Visualisierung/Mensch-Maschine-Schnittstelle - Architekturen - Parallel versus vector processing - Innovative Anwendungen."

Learn how to develop real-world applications of varying complexity for the web, mobile, and VR devices using React, React Native, React 360, and more Key Features Build React applications at scale using React patterns and best practices Explore React features such as Hooks, the Context API, and the Suspense API Extend React's integration with React Native for building cross-platform mobile apps and games Book DescriptionDeveloped by Facebook, React is a popular library for building impressive user interfaces. React extends its capabilities to mobile platforms using the React Native framework and integrates with popular web and mobile tools to build scalable applications. React Projects is your guide to learning React development by using modern development patterns and integrating React with powerful web tools, such as GraphQL, Expo, and React 360. You'll start building a real-world project right from the first chapter and get hands-on with developing scalable applications as you advance to building more complex projects. Throughout the book, you'll use the latest versions of React and React Native to explore features such as routing, Context, and Hooks on multiple platforms, which will help you build full-stack web and mobile applications efficiently. Finally, you'll get to grips with unit testing with Jest and end-to-end testing with Cypress to build test-driven apps. By the end of this React book, you'll have developed the skills necessary to start building scalable React apps across web and mobile platforms. What you will learn Create a wide range of applications using various modern React tools and frameworks Discover how React Hooks modernize state management for React apps Develop web applications using styled and reusable React components Build test-driven React applications using Jest, React Testing Library, and Cypress Understand full-stack development using GraphQL, Apollo, and React Perform server-side rendering using React and Next.js Create animated games using React Native and Expo Design gestures and animations for a cross-platform game using React Native Who this book is forThe book is for JavaScript developers who want to explore React tooling and frameworks for building cross-platform applications. Basic knowledge of web development, ECMAScript, and React will assist with understanding key concepts covered in this book.

Unleash the power of declarative programming in SwiftUI by building cross-platform Apple apps for iOS 15, macOS, and watchOS using Swift 5.5, Xcode 13, and SwiftUI 3 Key Features Apply the declarative programming paradigm to build cross-platform UIs for Apple devices Learn to integrate UIkit, Core Data, Firebase, and Sign in with Apple with SwiftUI Adopt the new SwiftUI 3.0 features to build visually appealing UIs speedily Book DescriptionSwiftUI provides an innovative and simple way to build beautiful user interfaces (UIs) for all Apple platforms, from iOS and macOS through to watchOS and tvOS, using the Swift programming language. In this recipe-based cookbook, you'll cover the foundations of SwiftUI as well as the new SwiftUI 3 features introduced in iOS 15 and explore a range of essential techniques and concepts that will help you through the development process. The cookbook begins by explaining how to use basic SwiftUI components. Once you've learned the core concepts of UI development, such as Views, Controls, Lists, and ScrollViews, using practical implementations in Swift, you'll advance to adding useful features to SwiftUI using drawings, built-in shapes, animations, and transitions. You'll understand how to integrate SwiftUI with exciting new components in the Apple development ecosystem, such as Combine for managing events and Core Data for managing app data. Finally, you'll write iOS, macOS, and watchOS apps by sharing the same SwiftUI codebase. By the end of this SwiftUI book, you'll have discovered a range of simple, direct solutions to common problems encountered when building SwiftUI apps. What you will learn Explore various layout presentations in SwiftUI such as HStack, VStack, LazyHStack, and LazyVGrid Create widgets to quickly display relevant content at glance Get up to speed with drawings in SwiftUI using built-in shapes, custom paths, and polygons Discover modern animation and transition techniques in SwiftUI Add user authentication using Firebase and Sign in with Apple Manage concurrency with Combine and async/await in SwiftUI Solve the most common SwiftUI problems, such as integrating a MapKit map, unit testing, snapshot testing, and previewing layouts Who this book is forThis book is for mobile developers who want to learn SwiftUI as well as experienced iOS developers transitioning from UIkit to SwiftUI. The book assumes knowledge of the Swift programming language. Knowledge of object-oriented design and data structures will be useful but not necessary. You'll also find this book to be a helpful resource if you're looking for reference material regarding the implementation of various features in SwiftUI.

According to Apple, there are currently 380,000 registered iOS developers and over a billion iOS devices in use worldwide. Swift, the language of iOS development, is the fastest growing programming language. iOS Development with Swift is a hands-on guide to creating apps for iPhone and iPad using the Swift language. It starts by giving a birdseye view of how an iOS application works and what it takes to build one. With the basics well in hand, the book takes readers through progressively more challenging examples as they learn how to design iOS apps, build good layouts, handle navigation, and interact with the device's camera. Key Features: * Hands-on guide to creating apps * Teaches the very basics * Rich in examples Written for readers with experience using a language like Java, Python, or C#. No prior iOS development or Swift experience required. About the Technology: Swift is a modern language created by Apple. In 2015 Swift was rated the most loved programming language on Stack Overflow, and it is currently ranked 17 in the programming language rankings guide of January 2016.

Learn how to build, maintain, and test Android applications using clean architecture principles Key Features Understand various software design principles and patterns to make an application more testable Structure your application's code into different layers and components to make it more maintainable and flexible Study popular libraries and frameworks and integrate them into an application Book DescriptionAs an application's code base increases, it becomes harder for developers to maintain existing features and introduce new ones. In this clean architecture book, you'll learn to identify when and how this problem emerges and how to structure your code to overcome it. The book starts by explaining clean architecture principles and Android architecture components and then explores the tools, frameworks, and libraries involved. You'll learn how to structure your application in the data and domain layers, the technologies that go in each layer, and the role that each layer plays in keeping your application clean. You'll understand how to arrange the code into these two layers and the components involved in assembling them. Finally, you'll cover the presentation layer and the patterns that can be applied to have a decoupled and testable code base. By the end of this architecture book, you'll be able to build an application following clean architecture principles and have the knowledge you need to maintain and test the application easily. What you will learn Discover and solve issues in Android legacy applications Become well versed in the principles behind clean architecture Get to grips with writing loosely coupled and testable code Find out how to structure an application's code in separate layers Understand the role each layer plays in keeping the application clean Integrate existing frameworks and libraries for each layer Who this book is forThis book is for Android developers who want to learn about managing the complexity of their applications, and is also highly recommended for intermediate or advanced Android developers looking for a go-to guide for clean architecture and the integration of various Android technologies. New developers familiar with the fundamentals of Android app development will find this book useful too.

Build robust applications using TDD with Swift 5.5 and become a TDD expert by writing tests for view controller, views, network code, and even SwiftUI view Key Features Build a complete iOS app using test-driven development Explore testing view controllers, table views, navigation, and network code Learn how to write tests for Combine and SwiftUI code Book DescriptionTest-driven development (TDD) is a proven way to find software bugs earlier on in software development. Writing tests before you code improves the structure and maintainability of your apps, and so using TDD in combination with Swift 5.5's improved syntax leaves you with no excuse for writing bad code. Developers working with iOS will be able to put their knowledge to work with this practical guide to TDD in iOS. This book will help you grasp the fundamentals and show you how to run TDD with Xcode. You'll learn how to test network code, navigate between different parts of the app, run asynchronous tests, and much more. Using practical, real-world examples, you'll begin with an overview of the TDD workflow and get to grips with unit testing concepts and code cycles. You'll then develop an entire iOS app using TDD while exploring different strategies for writing tests for models, view controllers, and networking code. Additionally, you'll explore how to test the user interface and business logic of iOS apps and even write tests for the network layer of the sample app. By the end of this TDD book, you'll be able to implement TDD methodologies comfortably in your day-to-day development for building scalable and robust applications. What you will learn Implement TDD in Swift application development Detect bugs before you run code using the TDD approach Use TDD to build models, view controllers, and views Test network code with asynchronous tests and stubs Write code that's a joy to read and maintain Design functional tests to suit your software requirements Discover scenarios where TDD should be applied and avoided Who this book is forThis book is for iOS developers looking to apply TDD to build maintainable and scalable applications. Intermediate-level developers with Swift application development experience will be able to make the most out of this book. Prior experience of applying TDD to Swift applications is not required.