Die Leistung von Computersystemen ist die ausschlaggebende Groe fur ihren Einsatz. Zur Messung der Leistung wird sehr oft das Benchmark-Verfahren als Standard-Tool eingesetzt, obwohl allgemein bekannt ist, dass die entsprechenden Ergebnisse nur eine sehr beschrankte Aussagekraft haben - dafur spricht naturlich ihre starke Orientierung an der Praxis. Modellbildende Techniken werden haufig zu Recht als "Mathematik-lastig" empfunden und suggerieren zudem eine Genauigkeit jenseits der Realitat. Dabei liegt es auf der Hand, dass beide Standpunkte sich erganzen und zusammen eine wesentlich bessere Messung, Analyse und Bewertung gestatten. Anhand dieser Konzeption erlautert der Autor bessere Methoden zur Leistungsbewertung von Computersystemen.

This volume contains the proceedings of an international workshop on "Experiences with Distributed Systems" held September 28-30, 1987, at the University of Kaiserslautern. The workshop was jointly sponsored and organized by the Sonderforschungsbereich 124 "VSLI-Entwurfsmethoden und ParallelitAt" and the European Network Center (ENC) of the IBM Corporation, Heidelberg. The objective of the workshop was to bring together researchers who had gathered substantial experience with the implementation of distributed systems. The emphasis was put on the exchange of (good and bad) experiences with existing concepts in distributed system design rather than presenting new ideas. Participation in the workshop was by invitation only. The presentations can be roughly categorized as reports on a specific project or reports on experiences with a certain topic accumulated through several projects. Other lectures treated general topics such as fault tolerance, design principles for distributed languages and systems, and distributed databases.

This volume contains revised versions of presentations at the International Workshop on Analogical and Inductive Inference (AII '86) held in Wendisch-Rietz, GDR, October 16-10, 1986. Inductive inference and analogical reasoning are two basic approaches to learning algorithms. Both allow for exciting problems and promising concepts of invoking deeper mathematical results for considerable advances in intelligent software systems. Hence analogical and inductive inference may be understood as a firm mathematical basis for a large variety of problems in artificial intelligence. While the papers on inductive inference contain technical results and reflect the state of the art of this well-developed mathematical theory, those devoted to analogical reasoning reflect the ongoing process of developing the basic concepts of the approach. The workshop thus contributes significantly to the advancement of this field.

This volume contains the proceedings of the Second International Conference on Rewriting Techniques and Applications, "RTA 87," held in Bordeaux, France, May 1987.

Hochaktuell und spannend: Wir erleben eine standig zunehmende Informatisierung. Informations- und Kommunikationstechnologien werden unseren Alltag kunftig weitaus starker durchdringen als wir es uns vorstellen konnen. Smarte Objekte werden stark an Bedeutung gewinnen. Die Kommunikation mit Alltagsgegenstanden wird selbstverstandlich werden. Die Einsatzmoglichkeiten dieser technischen Neuerungen sind unbegrenzt. Ausfuhrlich stellen die Autoren diese Neuerungen dar. Zudem erlautern sie die Einflusse auf die Gesellschaft und weisen auf Prozesse hin, die ein radikales Umdenken erfordern werden. Das erste deutschsprachige Buch zum Thema."

A good introduction to a new product or concept is vital. This is particularly true for a versatile software system such as UNIX. UNIX provides the depth and intelligence to make your computer work hard for you. It will help you create software and help you use your office automation equipment to create and edit documents. For your intro duction to UNIX, you want a great little book. That is what this work is meant to be. This book is designed for non-computer specialists, especially for executives, ad ministrators and managers who want to make better use of their software specialists and experts. The way this Springer edition has come to be published is itself a story. Back about 1980, the founder and president of one of the more successful microcomputer companies, Mr. Kazue Ishii of CEC, wanted to start somethig that would be brilliant, sophisticated, innovative, and which would grow steadily. Out of many proposals, the one he accepted happened to be mine. The proposal was to build a family of network workstations for computer-aided design/manufacturing and office automation. UNIX was to be used as a software generator. But he had a hard time understanding UNIX, what good it is and how good it is ... Spending a significant amount of time with a popular computer columnist, Miss Yukari Shirota, I compiled this book for him. I found this book generally useful for top executives, managers, planners and office administrators whose background is outside software engineering. Dr.

Know-how zur Abwehr von Hacker-Angriffen
Mehr Sicherheit fur Netze, Systeme und Anwendungen
Praxis-Leitfaden mit konzeptionellem Ansatz
Anschaulich durch zeitlose Beispiele

Ein Wettbewerb der Hacker? Wer knackt am schnellsten das Sicherheitssystem?
Die andere Seite - die Sicherheitsexperten - mussen in der Lage sein, Rechnernetze, Systeme und Anwendungen aus der Sicht eines Angreifers zu verstehen, um Sicherheitslucken erkennen und effizient schliessen zu konnen. Dabei unterstutzt sie das Buch.
Das Thema Sicherheit wird hier pragmatisch betrachtet. Die Sicherheit einer Komponente hangt meist direkt von einer oder mehreren anderen Komponenten ab, wobei diese Abhangigkeiten komplex und schwer erfassbar sind.
Auf Basis der Erfahrungen, die im Rahmen des "Hacker Contest" gesammelt wurden, vermittelt das Buch praxisnah die Grundsatze des Hackens bzw. Crackens und prinzipieller Angriffskonzepte.
Die Autoren sind kontiunierlich an der Konzeption und Durchfuhrung des Hacker Contest beteiligt. Sie haben bereits im Informatik-Spektrum einen Artikel zum Thema veroffentlich, der auf grosse Resonanz stiess."

Track, branch, merge, and manage code revisions with Git, the free and open source distributed version control system. Through a series of step-by-step tutorials, this practical guide quickly takes you from Git fundamentals to advanced techniques, and provides friendly yet rigorous advice for navigating Git's many functions. You'll learn how to work with everything from small to very large projects with speed and efficiency. In this third edition, authors Prem Kumar Ponuthorai and Jon Loeliger break down Git concepts using a modular approach. You'll start with the basics and fundamental philosophy of Git, followed by intermediate commands to help you efficiently supplement your daily development workflow. Finally, you'll learn advanced Git commands and concepts to understand how Git works under the hood. Learn how to use Git for real-world development scenarios Gain insight into Git's common use cases, initial tasks, and basic functions Use the system for distributed version control Learn how to manage merges, conflicts, patches, and diffs Apply advanced techniques such as rebasing, hooks, and ways to handle submodules

Bei Mac OS X handelt es sich um das jA1/4ngste Betriebssystem von Apple Computer. Es unterscheidet sich vom VorgAnger Mac OS 9 nicht nur durch eine Vielzahl von neuen Funktionen und durch die neue BenutzeroberflAche Aqua, sondern vor allen Dingen durch die Nutzung von Mach und BSD als Basis fA1/4r seine Implementierung. Mac OS X baut direkt auf den lange erprobten und weit verbreiteten Betriebssystemen FreeBSD und NetBSD auf.

Rafael Kobylinski, Manager System Engineers bei Apple Deutschland, gibt einen Aoeberblick A1/4ber Mac OS X aus der Sicht eines mit BSD- und Unix-Systemen vertrauten, fortgeschrittenen Anwenders. Das Buch richtet sich damit an erfahrene Mac OS X Anwender sowie Unix/Linux-Quereinsteiger.

Learn to use NATS and messaging as a solution for communication between services. The NATS project has been around since 2010, but it has become more popular in recent years due to how well it fits into the paradigm of cloud native applications and microservices architectures. It's fast becoming a very attractive option thanks to its great performance characteristics--a single server can push millions of messages per second--and overall simple design. First you will learn the fundamentals of NATS, such as its design, protocol and the styles of communications it enables, internals of the NATS clients, and how to use the basic API provided by all the official clients. You will also understand how to setup and configure NATS servers using the configuration file. Next you'll work with real-world projects and see how to develop a production-ready cloud native application using NATS as the control plane over which clients communicate. Finally you'll learn advanced usage of the NATS clients, such as implementing heartbeats based failure detectors, tracing or collecting multiple responses from a single request. Perhaps you are familiar with REST-style APIs, and want to make the transition into a messaging-based approach instead. Practical NATS is the perfect place to start. What You'll Learn Use NATS to build applications which use it as the control plane for communication among components Explore the fundamentals of NATS such as how the protocol works under the hood to more advanced communication styles which are possible with the basic building blocks provided by the client Setup, operate, and configure NATS servers, as well as how to troubleshoot common failure scenarios Who This Book Is For Anyone looking for a solution for some of the problems which come along with microservices and cloud native application development, such as service discovery, low latency requests, load balancing, tracing and monitoring for example. Also adopters of NATS who need further help getting started using it. Ideally you should have some familiarity with Go as that is the language of the code examples.

Docker does for DevOps what Rails did for web development--it gives you a new set of superpowers. Gone are works on my machine woes and lengthy setup tasks, replaced instead by a simple, consistent, Docker-based development environment that will have your team up and running in seconds. Gain hands-on, real-world experience with a tool that's rapidly becoming fundamental to software development. Go from zero all the way to production as Docker transforms the massive leap of deploying your app in the cloud into a baby step. Docker makes life as a Ruby and Rails developer easier. It helps build, ship, and run your applications, solving major problems you face every day. It allows you to run applications at scale, adding new resources as needed. Docker provides a reliable, consistent environment that's guaranteed to work the same everywhere. Docker lets you do all things DevOps without needing a PhD in infrastructure and operations. Want to spin up a cluster to run your app? No problem. Scale it up or down at will? You bet. Start by running a Ruby script without having Ruby installed on the local machine. Then Dockerize a Rails application and run it using containers, including creating your own custom Docker images tailored for running Rails apps. Describe your app declaratively using Docker Compose, specifying the software dependencies along with everything needed to run the application. Then set up continuous integration, as well as your deployment pipeline and infrastructure. Along the way, find out the best practices for using Docker in development and production environments. This book gives you a solid foundation on using Docker and fitting it into your development workflow and deployment process. What You Need: All you need is a Windows, Mac OS X or Linux machine to do development on. This book guides you through the process of installing Docker. Some basic familiarity with Linux/Unix is recommended even if you're using a Windows machine

Structure templates and content within Sitecore, work with integrated tools, and leverage its extensive automation capabilities. Sitecore was recently recognized as one of the most reputable and reliable, enterprise-class web content management solutions (WCMS) available in the marketplace. Thousands of companies are using Sitecore to manage their digital experiences online. Because Sitecore is such a large, complex platform, developers often have a hard time coming up to speed, even after completing a Sitecore training course for developers. However, leveraging the design patterns and other practices laid out in this book will make that transition much easier. Professional Sitecore 8 Development provides a soup-to-nuts approach for a Sitecore rookie to come up to speed quickly, as well as provide more advanced techniques for seasoned veterans that they may not be exposed to otherwise. Key coverage areas include: Getting started with Sitecore development Front-end development techniques Incorporating design patterns into your Sitecore solutions Unit testing Sitecore applications Programming Sitecore's marketing capabilities Sitecore automation with PowerShell Advanced development techniques What you'll learn Develop solutions on the Sitecore platform Come up to speed on Sitecore without going through a training class Build front-end (HTML, CSS, Angular, etc.) solutions as well as back-end (C#) solutions on Sitecore Incorporate design patterns into your Sitecore solutions Make use of advanced Sitecore development techniques Who This Book Is For The book is a developer's companion, both front end and back end developers. The target audience is both developers who have zero Sitecore experience, as well as seasoned veterans looking for advanced best practices. A secondary audience would be Sitecore administrators who would benefit from discussions around performance tuning and security.

Die Autoren erlAutern die konzeptionellen und technischen Grundlagen des Themas IT-Sicherheit anhand anschaulicher Beispiele. Im Fokus stehen dabei die praktische Verwendbarkeit realitAtsnaher Konzepte und Techniken. Hierzu werden ebenfalls aktuelle Standards erlAutert und eingebunden.

Um die KomplexitAt des Themas und seine AbhAngigkeiten darzustellen, werden die Integration der einzelnen Bausteine sowie der Betrieb eines solchen Verbundes von IT-Komponenten sowohl aus technischer als auch administrativer Sicht und unter dem Aspekt der Integration in eine organisationsweite IT-Infrastruktur betrachtet.

Das Buch bietet technisch versierten Einsteigern und Administratoren eine umfassende Grundlage fA1/4r die weitergehende Auseinandersetzung mit dem Thema IT-Sicherheit.

Nowadays, many aspects of electrical and electronic engineering are essentially applications of DSP. This is due to the focus on processing information in the form of digital signals, using certain DSP hardware designed to execute software. Fundamental topics in digital signal processing are introduced with theory, analytical tables, and applications with simulation tools. The book provides a collection of solved problems on digital signal processing and statistical signal processing. The solutions are based directly on the math-formulas given in extensive tables throughout the book, so the reader can solve practical problems on signal processing quickly and efficiently.

FEATURES

Explains how applications of DSP can be implemented in certain programming environments designed for real time systems, ex. biomedical signal analysis and medical image processing.

Pairs theory with basic concepts and supporting analytical tables.

Includes an extensive collection of solved problems throughout the text.

Fosters the ability to solve practical problems on signal processing without focusing on extended theory.

Covers the modeling process and addresses broader fundamental issues.

Table of Contents

Part 1: Digital Signal Processing. Introduction. Discrete-time Signals and Systems. z-Transform. Implementation of Discrete Systems. Frequency Domain Analysis. Designing Digital Filters. Part 2: Statistical Signal Processing. Statistical Models. Fundamental Principles of Parametric Estimation. Linear Evaluation. Fundamentals of Signal Detection.

Eingebettete Systeme begegnen uns mittlerweile uberall im Alltag: vom Mikrocontroller in der Waschmaschine bis hin zum leistungsfahigen DSP im Autoradio. Noch vor wenigen Jahren wurden diese Prozessoren aufwandig in Assembler programmiert und besassen nur in den wenigsten Fallen ein Betriebssystem. Mittlerweile aber bieten leistungsfahige und schlanke Linux-Derivate auch auf einfachen Prozessoren den Komfort der Schnittstellentreiber, des Multi-Threadings und eines Dateisystems. Die vorgestellte Hardware ist teilweise Konsumerprodukten entlehnt und somit gut erhaltlich.

Besonderer Wert wird auf die Praxistauglichkeit der Implementierungen gelegt, und so sind die Beispiele zur Hardwareanbindung via I2C, zur Kommunikation und zur Bildverarbeitung vollstandig durchimplementiert und online frei verfugbar. Das vorliegende Buch richtet sich an Berufsanfanger, Praktiker und Studenten der Informatik und der Ingenieurswissenschaften.

Weitere Informationen zum Buch sowie eine umfangreiche Quelltextsammlung sind verfugbar unter: http: //www.praxisbuch.net/embedded-linux/"

Semantische Techniken zur strukturierten Erschliessung von Web 2.0-Content und kollaborative Anreicherung von Web Content mit maschinenlesbaren Metadaten wachsen zum Social Semantic Web zusammen. Kennzeichnend ist dabei die breite Konvergenz zwischen Social Software und Semantic Web-Technologien. Das Buch stellt die technischen, organisatorischen und kulturellen Veranderungen dar, die das Social Semantic Web begleiten. Entscheidungstrager und Entwickler konnen auf dieser Grundlage die Tragweite dieser Technologie fur ihr Unternehmen erkennen."

In 2016, Google's Site Reliability Engineering book ignited an industry discussion on what it means to run production services today-and why reliability considerations are fundamental to service design. Now, Google engineers who worked on that bestseller introduce The Site Reliability Workbook, a hands-on companion that uses concrete examples to show you how to put SRE principles and practices to work in your environment. This new workbook not only combines practical examples from Google's experiences, but also provides case studies from Google's Cloud Platform customers who underwent this journey. Evernote, The Home Depot, The New York Times, and other companies outline hard-won experiences of what worked for them and what didn't. Dive into this workbook and learn how to flesh out your own SRE practice, no matter what size your company is. You'll learn: How to run reliable services in environments you don't completely control-like cloud Practical applications of how to create, monitor, and run your services via Service Level Objectives How to convert existing ops teams to SRE-including how to dig out of operational overload Methods for starting SRE from either greenfield or brownfield

Fundiertes Know-how fur Einsteiger und System-Administratoren: Verstandlich und klar strukturiert vermittelt der Grundlagenband alle wesentlichen Aspekte zum Management eines Solaris-Systems sowohl fur SPARC- als auch fur PC. Das Spektrum reicht von der Installation bis zum Arbeiten mit der Workstation bzw. dem Server. Eine CD-ROM mit Public Domain Software erganzt das Betriebssystem."

"Rails Cookbook" is packed with the solutions you need to be a proficient developer with Rails, the leading framework for building the new generation of Web 2.0 applications. Recipes range from the basics, like installing Rails and setting up your development environment, to the latest techniques, such as developing RESTful web services. With applications that are code light, feature-full and built to scale quickly, Rails has revolutionized web development. "The Rails Cookbook" addresses scores of real-world challenges; each one includes a tested solution, plus a discussion of how and why it works, so that you can adapt the techniques to similar situations. Topics include: modeling data with the ActiveRecord library; setting up views with ActionView and RHTML templates; building your application's logic into ActionController; testing and debugging your Rails application; building responsive web applications using JavaScript and Ajax; ensuring that your application is security and performs well; deploying your application with Mongrel and Apache; using Capistrano to automate deployment; using the many Rails plugins; and, working with graphics. Whether you're new to Rails or an experienced developer, you'll discover ways to test, debug and secure your applications, incorporate Ajax, use caching to improve performance, and put your application into production. Want to get ahead of the Web 2.0 curve? This valuable cookbook will save you hundreds of hours when developing applications with Rails.

Get an in-depth tour of OpenShift, the container-based software deployment and management platform from Red Hat that provides a secure multi-tenant environment for the enterprise. This practical guide describes in detail how OpenShift, building on Kubernetes, enables you to automate the way you create, ship, and run applications in a containerized environment. Author Graham Dumpleton provides the knowledge you need to make the best use of the OpenShift container platform to deploy not only your cloud-native applications, but also more traditional stateful applications. Developers and administrators will learn how to run, access, and manage containers in OpenShift, including how to orchestrate them at scale. Build application container images from source and deploy them Implement and extend application image builders Use incremental and chained builds to accelerate build times Automate builds by using a webhook to link OpenShift to a Git repository Add configuration and secrets to the container as project resources Make an application visible outside the OpenShift cluster Manage persistent storage inside an OpenShift container Monitor application health and manage the application lifecycle This book is a perfect follow-up to OpenShift for Developers: A Guide for Impatient Beginners (O'Reilly).

Dieses Hand- und Arbeitsbuch stellt die Konzepte und Anwendungstechniken von Linux vor. Viele Einzelheiten werden zusammenhangend und verstandlich dargestellt. Die Autoren beschreiben die haufig verwendeten Kommandos und Funktionen detailliert und erlautern sie an zahlreichen Beispielen. Damit soll das Werk den Einstieg in Linux und den Umstieg auf Linux erleichtern und dem Benutzer und Administrator als kompaktes Nachschlagewerk bei der taglichen Arbeit am Linux-Rechner dienen. Es werden sowohl die alphanumerische Oberflache als auch die grafischen Oberflachen KDE und GNOME behandelt. Die Autoren verfugen uber langjahrige Erfahrungen aus der Praxis mit UNIX und Linux und gehen vor allem auf SuSE- und Red Hat-Linux ein.

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