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Books > Computing & IT > Computer hardware & operating systems > Operating systems & graphical user interfaces (GUIs)
In general, distributed systems can be classified into Distributed File Systems (DFS) and Distributed Operating Systems (DOS). The survey which follows distinguishes be tween DFS approaches in Chapters 2-3, and DOS approaches in Chapters 4-5. Within DFS and DOS, I further distinguish "traditional" and object-oriented approaches. A traditional approach is one where processes are the active components in the systems and where the name space is hierarchically organized. In a centralized environment, UNIX would be a good example of a traditional approach. On the other hand, an object-oriented approach deals with objects in which all information is encapsulated. Some systems of importance do not fit into the DFS/DOS classification. I call these systems "closely related" and put them into Chapter 6. Chapter 7 contains a table of comparison. This table gives a lucid overview summarizing the information provided and allowing for quick access. The last chapter is added for the sake of completeness. It contains very brief descriptions of other related systems. These systems are of minor interest or do not provide transparency at all. Sometimes I had to assign a system to this chapter simply for lack of adequate information about it."
Architectural and hardware advances in computing design are occurring at an ever quickening rate, but it is the operating system that masters the complexity of these new computing devices to make them useful tools. Operating systems can make the difference between an interesting architecture and a useful computing environment. As more complex computational structures and more powerful communication technologies become available, we are faced with the need to develop new generations of operating systems to harness their power. This volume presents the proceedings of an international workshop intended to plot a course for design and development work on operating systems over the coming decade that was held in Dagstuhl Castle, Germany, in July 1991. Eight sessions covered: - Size, scalability and distribution in future operating systems, - The impact of future trends in hardware and communication technology, - Integrating heterogeneous operating systems, - Trends in real-time operating systems, - Fault tolerance support in futute operating systems, - Security and protection support in future operating systems, - The next generation of operating systems, - Supporting mulitmedia applications in distributed systems.
Andy Rathbone zeigt Ihnen schnell und dennoch verstAndlich alles Wichtige, was Sie A1/4ber Windows 10 und dessen Updates wissen mA1/4ssen: Erfahren Sie, was neu ist, wie Sie die neuen Funktionen nutzen und wie Sie altbekannte wiederfinden. Der Autor unterstA1/4tzt Sie dabei, Ihre Daten von einem alten Computer auf einen neuen Windows-10-PC zu A1/4bertragen und Windows 10 an Ihre BedA1/4rfnisse anzupassen. So kommen Sie mit Ihrem neuen Betriebssystem im Handumdrehen zurecht und fA1/4hlen sich schnell wieder zuhause.
This special volume contains the Proceedings of a Workshop on "Parallel Algorithms and Transputers for Optimization" which was held at the University of Siegen, on November 9, 1990. The purpose of the Workshop was to bring together those doing research on 2.lgorithms for parallel and distributed optimization and those representatives from industry and business who have an increasing demand for computing power and who may be the potential users of nonsequential approaches. In contrast to many other conferences, especially North-American, on parallel processing and supercomputers the main focus of the contributions and discussion was "problem oriented". This view reflects the following philosophy: How can the existing computing infrastructure (PC's, workstations, local area networks) of an institution or a company be used for parallel and/or distributed problem solution in optimization. This volume of the LECfURE NOTES ON ECONOMICS AND MA THEMA TICAL SYSTEMS contains most of the papers presented at the workshop, plus some additional invited papers covering other important topics related to this workshop. The papers appear here grouped according to four general areas. (1) Solution of optimization problems using massive parallel systems (data parallelism). The authors of these papers are: Lootsma; Gehne. (II) Solution of optimization problems using coarse-grained parallel approaches on multiprocessor systems (control parallelism). The authors of these papers are: Bierwirth, Mattfeld, and Stoppler; Schwartz; Boden, Gehne, and Grauer; and Taudes and Netousek.
In iOS and macOS (TM) Performance Tuning, Marcel Weiher drills down to the code level to help you systematically optimize CPU, memory, I/O, graphics, and program responsiveness in any Objective-C, Cocoa, or CocoaTouch program. This guide focuses entirely on performance optimization for macOS and iOS. Drawing on more than 25 years of experience optimizing Apple device software, Weiher identifies concrete performance problems that can be discovered empirically via measurement. Then, based on a deep understanding of fundamental principles, he presents specific techniques for solving them. Weiher presents insights you won't find anywhere else, most of them applying to both macOS and iOS development. Throughout, he reveals common pitfalls and misconceptions about Apple device performance, explains the realities, and helps you reflect those realities in code that performs beautifully. Understand optimization principles, measurement, tools, pitfalls, and techniques Recognize when to carefully optimize, and when it isn't worth your time Balance performance and encapsulation to create efficient object representations, communication, data access, and computation Avoid mistakes that slow down Objective-C programs and hinder later optimization Fix leaks and other problems with memory and resource management Address I/O issues associated with drives, networking, serialization, and SQLite Code graphics and UIs that don't overwhelm limited iOS device resources Learn what all developers need to know about Swift performance This book's source code can be downloaded at github.com/mpw/iOS-macOS-performance. Register your product at informit.com/register for convenient access to downloads, updates, and corrections as they become available.
This volume contains the proceedings of the 4th International Workshop on Distributed Algorithms, held near Bari, Italy, September 24-26, 1990. The workshop was a forum for researchers, students and other interested persons to discuss recent results and trends in the design and analysis of distributed algorithms for communication networks and decentralized systems. The volume includes all 28 papers presented at the workshop, covering current research in such aspects of distributed algorithm design as distributed combinatorial algorithms, distributed algorithms on graphs, distributed algorithms for new types of decentralized systems, distributed data structures, synchronization and load-balancing, distributed algorithms for control and communication, design and verification of network protocols, routing algorithms, fail-safe and fault-tolerant distributed algorithms, distributed database techniques, algorithms for transaction management and replica control, and other related topics.
The market for information technology products is rapidly changing from a manufactur er-driven market where new products were determined by the evolution of technology, to a user-driven market where users buy only products corresponding exactly to their needs and where competition is very strong. Confronted with this market situation, hardware and software producers are being obliged to adopt new strategies, and to make a large number of products available on the market in response to a variety of different needs. As a result of the multiplicity of choice available, the design of an office system which corresponds precisely to user needs is becoming an increasingly complex task. With exactly this in mind, the Commission, as early as 1985, invited submissions of projects aiming at the development of such adequate tools in its Call for Proposals for the ESPRIT Programme, in order to assist companies in the design of their office systems. This topic was recognised as being of strategic importance, considering the low level of penetration of Information Technology in European enterprises compared to the United States and Japan. Following this strategy, the project TODOS was selected and launched. This project has successfully developed tools and methods for the definition of the functional specifi cation of the office system, as well as the system architecture and user interface -results which can be of great interest for the IT community at large.
A System V Guide to UNIX and XENIX takes the novice reader through the features of the UNIX system step-by-step without jargon and assumptions about the reader's technical knowledge found in similar books. With its clear explanations, numerous examles, and straightforward organization, this book appeals to many non-technical people just beginning to work with UNIX, as well as engineers and programmers with prior experience. Anyone who reads this book will learn how to use the features of UNIX, and how to modify and customize those features. It is organized in such a way that it leads the reader from the UNIX basics to the more complex and powerful concepts such as shell-programming and networking. Although the book is written as introduction and reference for the UNIX user, it can very well be used as a textbook in undergraduate computer science or computer engineering courses.
Whether you're new to the Mac or a longtime user, this handy
book is the quickest way to get up to speed on Snow Leopard. Packed
with concise information in an easy-to-read format, Mac OS X Snow
Leopard Pocket Guide covers what you need to know and is an ideal
resource for problem-solving on the fly.
During the last few years, computers have evolved from pure number crunching machines to "intelligent" problem solving tools. Increasing effort has been spent on the investigation of new approaches and the application of solutions to real world problems. In this way, exciting new techniques have evolved providing support for an increasing number of technical and economical aspects. Applications range from the design and development of ultra highly integrated circuits to totally new man-machine interfaces, from software engineering tools to fault diagnosis systems, from decision support to even the analysis of unemployment. Following a first joint workshop on Advanced Information Processing held in July 1988 at the Institute for Problems of Informatics of the USSR Academy of Sciences (IPIAN) at Moscow, this was the second time that scientists and researchers from the USSR Academy of Sciences and Siemens AG, Corporate Research and Development, exchanged results and discussed recent advances in the field of applied computer sciences. Initiated by Prof. Dr. I. Mizin, Corresponding Member of the USSR Academy of Sciences and Director of IPIAN, and Prof. Dr. H. Schwartzel, Vice President of the Siemens AG and Head of the Applied Computer Science & Software Department, a joint symposium was arranged at the USSR Academy of Sciences in Moscow on June 5th and 6th 1990. The meetings on Information Processing and Software and Systems Design Automation provided a basis both for presentations of ongoing research and for discussions about specific problems.
The purpose of this workshop was to provide a general forum for distributed systems researchers. Special em- phasis was placed on research activities in distributed operating systems and management of distributed sys- stems. This volume includes a selection of the papers presented at the workshop. They focus on the illustration of existing concepts and solutions in distributed systems research and development, exemplified by case study analyses of various projects. The annex contains the position papers prepared for the panel discussions at the workshop.
Learn how to attack and defend the world s most popular web server platform Linux Server Security: Hack and Defend presents a detailed guide for experienced admins, aspiring hackers and other IT professionals seeking a more advanced understanding of Linux security. Written by a 20-year veteran of Linux server deployment this book provides the insight of experience along with highly practical instruction. The topics range from the theory of past, current, and future attacks, to the mitigation of a variety of online attacks, all the way to empowering you to perform numerous malicious attacks yourself (in the hope that you will learn how to defend against them). By increasing your understanding of a hacker s tools and mindset you're less likely to be confronted by the all-too-common reality faced by many admins these days: someone else has control of your systems. * Master hacking tools and launch sophisticated attacks: perform SQL injections, deploy multiple server exploits and crack complex passwords. * Defend systems and networks: make your servers invisible, be confident of your security with penetration testing and repel unwelcome attackers. * Increase your background knowledge of attacks on systems and networks and improve all-important practical skills required to secure any Linux server. The techniques presented apply to almost all Linux distributions including the many Debian and Red Hat derivatives and some other Unix-type systems. Further your career with this intriguing, deeply insightful, must-have technical book. Diverse, broadly-applicable and hands-on practical, Linux Server Security: Hack and Defend is an essential resource which will sit proudly on any techie's bookshelf.
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 book presents the proceedings of the Sixth International Conference on Category Theory and Computer Science, CTCS '95, held in Cambridge, UK in August 1995.The 15 revised full papers included in the volume document the exploitation of links between logic and category theory leading to a solid basis for much of the understanding of the semantics of computation. Notable amongst other advances is the introduction of linear logic and other substructural logics, providing a new approach to proof theory. Further aspects covered are semantics of lambda calculi and type theories, program specification and development, and domain theory.
This volume contains the proceedings of the First International Workshop on Algebraic and Logic Programming held in Gaussig (German Democratic Republic) from November 14 to 18, 1988. The workshop was devoted to Algebraic Programming, in the sense of programming by algebraic specifications and rewrite rule systems, and Logic Programming, in the sense of Horn clause specifications and resolution systems. This includes combined algebraic/logic programming systems, mutual relations and mutual implementation of programming paradigms, completeness and efficiency considerations in both fields, as well as related topics.
This volume is based on the "School/Workshop on Linear Time, Branching Time and Partial Order in Logics and Models for Concurrency" organized by the editors and held in the period May 30-June 3, 1988 at Noordwijkerhout, The Netherlands. The School/Workshop was an activity of the project REX - Research and Education in Concurrent Systems. The volume contains tutorials and research contributions to the three approaches - linear time, - branching time, and - partial order in semantics and proof theory of concurrent programs by the main specialists in this field. It promotes an in-depth understanding of the relative merits and disadvantages of these three approaches. An introduction to the recent literature on the subject is provided by the invited research contributions.
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.
Well suited to medium-scale general purpose computing, the Unix time sharing operating system is deservedly popular with academic institutions, research laboratories, and commercial establishments alike. Its user com munity, until recently a brotherhood of experienced computer profes sionals, it now attracting many people concerned with computer appli cations rather than the computer systems themselves. This book is intended for that new audience, people who have never encountered the Unix system before but who do have some acquaintance with computing. While helping beginning users get started is the primary aim of this book, it is also intended to serve as a handy reference subsequently. However, it is not designed to replace the definitive Unix system docu mentation. Unix operating systems now installed in computing centers, offices, and personal computers come in three related but distinct breeds: Seventh Edition Unix, Berkeley 4.2 BSD, and System V. These differ from each other in details, even though their family resemblance is strong. This book emphasizes System V, while paying heed to its two popular cousins. It also includes a few facilities in wide use, but not included in the normal system releases. Individual details, of course, must be found in the manuals supplied with each system."
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."
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.
Know-how zur Abwehr von Hacker-Angriffen Ein Wettbewerb der Hacker? Wer knackt am schnellsten das
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