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Author: Eugene John
Publisher: CRC Press
ISBN: 142005175X
Category : Technology & Engineering
Languages : en
Pages : 388
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Book Description
Which came first, the system or the chip? While integrated circuits enable technology for the modern information age, computing, communication, and network chips fuel it. As soon as the integration ability of modern semiconductor technology offers presents opportunities, issues in power consumption, reliability, and form-factor present challenges. The demands of emerging software applications can only be met with unique systems and chips. Drawing on contributors from academia, research, and industry, Unique Systems and Chips explores unique approaches to designing future computing and communication chips and systems. The book focuses on specialized hardware and systems as opposed to general-purpose chips and systems. It covers early conception and simulation, mid-development, application, testing, and performance. The chapter authors introduce new ideas and innovations in unique aspects of chips and system design, then go on to provide in-depth analysis of these ideas. They explore ways in which these chips and systems may be used in further designs or products, spurring innovations beyond the intended scopes of those presented. International in flavor, the book brings industrial and academic perspectives into focus by presenting the full spectrum of applications of chips and systems.
Author: Eugene John
Publisher: CRC Press
ISBN: 142005175X
Category : Technology & Engineering
Languages : en
Pages : 388
Get Book Here
Book Description
Which came first, the system or the chip? While integrated circuits enable technology for the modern information age, computing, communication, and network chips fuel it. As soon as the integration ability of modern semiconductor technology offers presents opportunities, issues in power consumption, reliability, and form-factor present challenges. The demands of emerging software applications can only be met with unique systems and chips. Drawing on contributors from academia, research, and industry, Unique Systems and Chips explores unique approaches to designing future computing and communication chips and systems. The book focuses on specialized hardware and systems as opposed to general-purpose chips and systems. It covers early conception and simulation, mid-development, application, testing, and performance. The chapter authors introduce new ideas and innovations in unique aspects of chips and system design, then go on to provide in-depth analysis of these ideas. They explore ways in which these chips and systems may be used in further designs or products, spurring innovations beyond the intended scopes of those presented. International in flavor, the book brings industrial and academic perspectives into focus by presenting the full spectrum of applications of chips and systems.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 892
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Book Description
Author: Tone Magister
Publisher: BoD – Books on Demand
ISBN: 9535106864
Category : Technology & Engineering
Languages : en
Pages : 190
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Book Description
Provision of air navigation services entered a new era of performance scheme. The performance scheme provides binding targets on four key performance areas of safety, capacity, environment and cost-efficiency. It is imposed that targets are fully achieved, but it is not prescribed how, this being typical for the performance based and goal oriented regulation. Those key performance areas are interlaced by proportional and inversely proportional interdependencies. Namely, for example and simplified into one sentence; if one aims to increase sector capacity with existing human resources (constant staff costs) and not investing into the technology (constant support cost) to achieve improved cost-efficiency of service provision, the resulting overloaded system might unlock the Pandora box of latent safety issues. Since failure is not an option, we - the general, migrating and traveling public, airspace users, airport operators, air navigation services providers and the economy - will gain attaining the goals of performance scheme in the process. However, un-answered cardinal question is what is the winning strategy? This book provides do-not-forget-peculiarities insight into the elements of new business model of air navigation services provision as evolution of the latter became essential.
Author: Javier Lopez
Publisher: Springer
ISBN: 3540690840
Category : Computers
Languages : en
Pages : 294
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Book Description
This book constitutes the thoroughly refereed post-proceedings of the First International Workshop on Critical Information Infrastructures Security, CRITIS 2006, held on Samos Island, Greece in August/September 2006 in conjunction with ISC 2006, the 9th International Information Security Conference. The papers address all security-related heterogeneous aspects of critical information infrastructures.
Author: August Ernstsson
Publisher: Linköping University Electronic Press
ISBN: 9179297722
Category :
Languages : en
Pages : 155
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Book Description
Today's society is increasingly software-driven and dependent on powerful computer technology. Therefore it is important that advancements in the low-level processor hardware are made available for exploitation by a growing number of programmers of differing skill level. However, as we are approaching the end of Moore's law, hardware designers are finding new and increasingly complex ways to increase the accessible processor performance. It is getting more and more difficult to effectively target these processing resources without expert knowledge in parallelization, heterogeneous computation, communication, synchronization, and so on. To ensure that the software side can keep up, advanced programming environments and frameworks are needed to bridge the widening gap between hardware and software. One such example is the pattern-centric skeleton programming model and in particular the SkePU project. The work presented in this thesis first redesigns the SkePU framework based on modern C++ variadic template metaprogramming and state-of-the-art compiler technology. It then explores new ways to improve performance: by providing new patterns, improving the data access locality of existing ones, and using both static and dynamic knowledge about program flow. The work combines novel ideas with practical evaluation of the approach on several applications. The advancements also include the first skeleton API that allows variadic skeletons, new data containers, and finally an approach to make skeleton programming more customizable without compromising universal portability.
Author: John Törnblom
Publisher: Linköping University Electronic Press
ISBN: 917929748X
Category :
Languages : en
Pages : 22
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Book Description
In the presence of data and computational resources, machine learning can be used to synthesize software automatically. For example, machines are now capable of learning complicated pattern recognition tasks and sophisticated decision policies, two key capabilities in autonomous cyber-physical systems. Unfortunately, humans find software synthesized by machine learning algorithms difficult to interpret, which currently limits their use in safety-critical applications such as medical diagnosis and avionic systems. In particular, successful deployments of safety-critical systems mandate the execution of rigorous verification activities, which often rely on human insights, e.g., to identify scenarios in which the system shall be tested. A natural pathway towards a viable verification strategy for such systems is to leverage formal verification techniques, which, in the presence of a formal specification, can provide definitive guarantees with little human intervention. However, formal verification suffers from scalability issues with respect to system complexity. In this thesis, we investigate the limits of current formal verification techniques when applied to a class of machine learning models called tree ensembles, and identify model-specific characteristics that can be exploited to improve the performance of verification algorithms when applied specifically to tree ensembles. To this end, we develop two formal verification techniques specifically for tree ensembles, one fast and conservative technique, and one exact but more computationally demanding. We then combine these two techniques into an abstraction-refinement approach, that we implement in a tool called VoTE (Verifier of Tree Ensembles). Using a couple of case studies, we recognize that sets of inputs that lead to the same system behavior can be captured precisely as hyperrectangles, which enables tractable enumeration of input-output mappings when the input dimension is low. Tree ensembles with a high-dimensional input domain, however, seems generally difficult to verify. In some cases though, conservative approximations of input-output mappings can greatly improve performance. This is demonstrated in a digit recognition case study, where we assess the robustness of classifiers when confronted with additive noise.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 974
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Book Description
Author: Domenico Cotroneo
Publisher: Springer Science & Business Media
ISBN: 8847027721
Category : Computers
Languages : en
Pages : 213
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Book Description
The demand for large-scale dependable, systems, such as Air Traffic Management, industrial plants and space systems, is attracting efforts of many word-leading European companies and SMEs in the area, and is expected to increase in the near future. The adoption of Off-The-Shelf (OTS) items plays a key role in such a scenario. OTS items allow mastering complexity and reducing costs and time-to-market; however, achieving these goals by ensuring dependability requirements at the same time is challenging. CRITICAL STEP project establishes a strategic collaboration between academic and industrial partners, and proposes a framework to support the development of dependable, OTS-based, critical systems. The book introduces methods and tools adopted by the critical systems industry, and surveys key achievements of the CRITICAL STEP project along four directions: fault injection tools, V&V of critical systems, runtime monitoring and evaluation techniques, and security assessment.
Author: Alessandro Aldini
Publisher: Springer Science & Business Media
ISBN: 1848002238
Category : Computers
Languages : en
Pages : 316
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Book Description
Inthe?eldofformalmethodsincomputerscience,concurrencytheoryisreceivinga constantlyincreasinginterest.Thisisespeciallytrueforprocessalgebra.Althoughit had been originally conceived as a means for reasoning about the semantics of c- current programs, process algebraic formalisms like CCS, CSP, ACP, ?-calculus, and their extensions (see, e.g., [154,119,112,22,155,181,30]) were soon used also for comprehendingfunctionaland nonfunctionalaspects of the behaviorof com- nicating concurrent systems. The scienti?c impact of process calculi and behavioral equivalences at the base of process algebra is witnessed not only by a very rich literature. It is in fact worth mentioningthe standardizationprocedurethat led to the developmentof the process algebraic language LOTOS [49], as well as the implementation of several modeling and analysis tools based on process algebra, like CWB [70] and CADP [93], some of which have been used in industrial case studies. Furthermore, process calculi and behavioral equivalencesare by now adopted in university-levelcourses to teach the foundations of concurrent programming as well as the model-driven design of concurrent, distributed, and mobile systems. Nevertheless, after 30 years since its introduction, process algebra is rarely adopted in the practice of software development. On the one hand, its technica- ties often obfuscate the way in which systems are modeled. As an example, if a process term comprises numerous occurrences of the parallel composition operator, it is hard to understand the communicationscheme among the varioussubterms. On the other hand, process algebra is perceived as being dif?cult to learn and use by practitioners, as it is not close enough to the way they think of software systems.
Author: Vladislavs Jahundovics
Publisher: Linköping University Electronic Press
ISBN: 9176859185
Category :
Languages : en
Pages : 155
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Book Description
This thesis presents a completely automatic verification framework to check safety properties of parameterized systems. A parameterized system is a family of finite state systems where every system consists of a finite number of processes running in parallel the same algorithm. All the systems in the family differ only in the number of the processes and, in general, the number of systems in a family may be unbounded. Examples of parameterized systems are communication protocols, mutual exclusion protocols, cache coherence protocols, distributed algorithms etc. Model-checking of finite state systems is a well-developed formal verification approach of proving properties of systems in an automatic way. However, it cannot be applied directly to parameterized systems because the unbounded number of systems in a family means an infinite state space. In this thesis we propose to abstract an original family of systems consisting of an unbounded number of processes into one consisting of a fixed number of processes. An abstracted system is considered to consist of k+1 components—k reference processes and their environment. The transition relation for the abstracted system is an over-approximation of the transition relation for the original system, therefore, a set of reachable states of the abstracted system is an over-approximation of the set of reachable states of the original one. A safety property is considered to be parameterized by a fixed number of processes whose relationship is in the center of attention in the property. Such processes serve as reference processes in the abstraction. We propose an encoding which allows to perform reachability analysis for an abstraction parameterized by the reference processes. We have successfully verified three classic parameterized systems with replicated processes by applying this method.
