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Author: Marilyn Kaye
Publisher: Skylark
ISBN: 0804149941
Category : Juvenile Fiction
Languages : en
Pages : 106
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Book Description
Something's wrong with Tasha--she's not herself. At least that's what Amy thinks. And a best friend would know! Tasha's eyes look glazed. Her usual quick comebacks have become dull, one-word answers. It's as if Tasha is acting out some part in a horror movie. Only this isn't a movie, it's real. One by one, Amy notices other personality changes. Everyone seems possessed! And soon . . . whatever is happening to them may happen to Amy too.
Author: Marilyn Kaye
Publisher: Skylark
ISBN: 0804149941
Category : Juvenile Fiction
Languages : en
Pages : 106
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Book Description
Something's wrong with Tasha--she's not herself. At least that's what Amy thinks. And a best friend would know! Tasha's eyes look glazed. Her usual quick comebacks have become dull, one-word answers. It's as if Tasha is acting out some part in a horror movie. Only this isn't a movie, it's real. One by one, Amy notices other personality changes. Everyone seems possessed! And soon . . . whatever is happening to them may happen to Amy too.
Author: Fabrizio Grandoni
Publisher: Springer
ISBN: 3540360808
Category : Computers
Languages : en
Pages : 297
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Book Description
It was with great pleasure that, on behalf of the entire organizing committee, I welcomed participants to EDCC-4, the Fourth European Dependable Computing Conference, held for the ?rst time in France. The fourth issue of EDCC carried on the traditions established bythe previous conferences in this series: EDCC-1 was held in Berlin (Germany) in October 1994, EDCC-2 in Taormina (Italy) in October 1996, and EDCC-3 in Prague (Czech Republic) in September 1999. EDCC evolved from a merger of tow other conference series at the moment when the Iron Curtain fell. One of these, known as the ”International Conf- ence on Fault-Tolerant Computing Systems”, was organized during the period 1982–1991, bythe German Technical Interest Group ”Fault-Tolerant Computing Systems”. The other series, known as the ”International Conference on Fault- Tolerant Systems and Diagnostics”, was organized during the period 1975–1990 in the former Czechoslovakia, Poland, Bulgaria, and the former GDR. The c- position of the EDCC steering committee and the organizing committees of the successive issues of the conference have mirrored the East–West uni?cation ch- acter of the conference series. The EDCC conference is becoming a unique meeting point for researchers and practitioners from all over the world in the ?eld of Dependable Systems. It is organized bythe SEE Working Group ”Dependable Computing” in France, the GI/ITG/GMA Technical Committee on Dependabilityand Fault Tolerance in Germany, and the AICA Working Group ”Dependability of Computer Systems” in Italy. Furthermore, committees of several global professional organizations, such as IEEE and IFIP, support the conference.
Author: Marilyn Kaye
Publisher: Skylark
ISBN: 0804149879
Category : Juvenile Fiction
Languages : en
Pages : 117
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Book Description
Amy knows Nancy isn't her birth mother, but she has raised Amy as her own daughter. Then a woman shows up claiming to be Amy's biological mother. She's got her own explanations about Amy's special abilities and wants Amy back. With doubts about her identity, Amy begins to dig deeper into her origins. But the truth could destroy the only family she's ever known.
Author: Christopher S. Wood
Publisher: University of Chicago Press
ISBN: 0226905977
Category : Art
Languages : en
Pages : 399
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Book Description
Credulity -- Reference by artifact -- Germany and "Renaissance"--Forgery -- Replica -- Fiction -- Re-enactment.
Author: B. C. Muddle
Publisher:
ISBN:
Category : Alloys
Languages : en
Pages : 438
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Book Description
Author: Ahti-Veikko Pietarinen
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 3110651424
Category : Philosophy
Languages : en
Pages : 279
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Book Description
In three comprehensive volumes, Logic of the Future presents a full panorama of Charles S. Peirce’s important late writings. Among the most influential American thinkers, Peirce took his existential graphs to be his greatest contribution to human thought. The manuscripts from 1895—1913, most of which are published here for the first time, testify the richness and open-endedness of his theory of logic and its applications. They also invite us to reconsider our ordinary conceptions of reasoning as well as the conventional stories told about the evolution of modern logic. This second volume collects Peirce’s writings on existential graphs related to his Lowell Lectures of 1903, the annus mirabilis of his that became decisive in the development of the mature theory of the graphical method of logic.
Author:
Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 1260
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Author: Marilyn Kaye
Publisher: Skylark
ISBN: 0804149925
Category : Juvenile Fiction
Languages : en
Pages : 100
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Book Description
Amy never knew whom Mr. Devon worked for--the organization that's after her, or some other secret government agency. All she knew was that he seemed to be her ally. He always appeared just when she needed help or vital information. But ever since Mr. Devon's death, Amy has relied on her own smarts to survive. And she'll need them more than ever now that a new substitute teacher at school has it in for her. Ms. Heartshorn has a reputation for being demanding. She doesn't tolerate fools or careless work. And her feedback can be . . . well, a little harsh. Amy hates her. But when she learns why Ms. Heartshorn is really at school, Amy totally flips out.
Author: Jungnickel, Tim
Publisher: Universitätsverlag der TU Berlin
ISBN: 3798330018
Category : Mathematics
Languages : en
Pages : 196
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In traditional service architectures that follow the service statelessness principle, the state is primarily held in the data tier. Here, service operators utilize tailored storage solutions to guarantee the required availability; even though failures can occur at any time. This centralized approach to store and process an application’s state in the data tier implies that outages of the entire tier cannot be tolerated. An alternative approach, which is in focus of this thesis, is to decentralize the processing of state information and to use more stateful components in the early tiers. The possibility to tolerate a temporary outage of an entire tier implies that the application’s state can be manipulated by the remaining tiers without waiting for approval from the unavailable tier. This setup requires multi-leader replication, where every replica can accept writes and forwards the resulting changes to the other replicas. This thesis explores the feasibility of using multi-leader replication to store and process state in a decentralized manner across multiple tiers. To this end, two replication mechanisms, namely Conflict-free Replicated Data Types and Operational Transformation, are under particular investigation. We use and extend both mechanism to demonstrate that the aforementioned decentralization is worth considering when designing a service architecture. The challenges that arise when following our approach go back to fundamental impossibility results in distributed systems research, i.e. the impossibility to achieve a fault-tolerant consensus mechanism in asynchronous systems and the inevitable trade-off between availability and consistency in the presence of failures. With this thesis, we contribute to close the exposed gaps of both results by providing usable alternatives for standard IT services. We exemplify the feasibility of our alternatives with a fully distributed IMAP service and a programming library that provides the necessary extension to utilize our approach in a variety of web-based applications. All contributions of this thesis are based on both theory and practice. In particular, all extensions to the existing multi-leader replication mechanisms were proven to satisfy the necessary properties. Moreover, those extensions were also implemented as prototypical applications and evaluated against the corresponding de facto standard software from the industry. Basierend auf dem “service statelessness principle” ist es üblich, Softwaredienste so zu entwerfen, dass der Zustand des Dienstes primär in einer gekapselten Datenschicht verarbeitet wird. Innerhalb der Datenschicht werden spezielle Lösungen verwendet, um die Verfügbarkeit der Daten sicherzustellen. Dieser zentralisierte Ansatz hat zur Folge, dass ein Ausfall oder eine temporäre Nichtverfügbarkeit der gesamten Datenschicht zwangsweise zur Nichtverfügbarkeit des gesamten Dienstes führt. Ein alternativer Ansatz, welcher in dieser Arbeit erforscht wird, ist die dezentralisierte Speicherung und Verarbeitung der Daten in den darüberliegenden Softwareschichten. Um in diesem Ansatz einen Ausfall der gesamten Datenschicht zu kompensieren, ist es zwingend notwendig, dass die verbleibenden Schichten die eingehenden Anfragen ohne die Bestätigung durch die Datenschicht beantworten können. Hierfür wird eine Replikationsarchitektur benötigt, in der jedes Replikat die Anfragen direkt beantworten kann; die so genannte “multi-leader replication”. In dieser Arbeit werden diese Replikationsarchitekturen verwendet, um den Zustand und die Daten eines Dienstes zu dezentralisieren und über mehrere Schichten zu replizieren. Hierbei werden zwei Mechanismen detaillierter betrachtet: “Conflict-free Replicated Data Types” und “Operational Transformation”. Anschließend werden beide Mechanismen erweitert und hinsichtlich der Verwendbarkeit für den beschriebenen Ansatz geprüft. Als Ergebnis dieser Arbeit wird gezeigt, dass ein dezentralisierter Ansatz mit den vorgestellten Mechanismen in Betracht gezogen werden kann. Die Herausforderungen, die bei der Anwendung dieses Ansatzes entstehen, basieren auf nachweislich unlösbaren Problemen aus der Forschung von Verteilten Systemen. Dazu gehört die Unlösbarkeit von Konsensus und die unausweichliche Abwägung zwischen Verfügbarkeit und Konsistenz in einem verteilten System mit Ausfällen. Diese Arbeit trägt dazu bei, die entstehenden Lücken, welche aus diesen fundamentalen Ergebnissen resultieren, zu schließen und die vorgeschlagenen Lösungen für reale IT Dienste anwendbar zu machen. Dieses wird anhand eines dezentralen IMAP Dienstes und einer Programmierbibliothek für Webanwendungen verdeutlicht. Alle Bestandteile dieser Doktorarbeit verbinden Theorie und Praxis. Alle vorgeschlagenen Erweiterungen für bestehende Replikationssysteme werden in formalen Modellen verifiziert und prototypisch implementiert. Die Implementierungen werden außerdem mit vergleichbarer Standardsoftware, welche dem heutigen Stand der Technik entspricht, in praktischen Experimenten evaluiert.
Author: National Academy of Sciences (U.S.)
Publisher:
ISBN:
Category : Electronic journals
Languages : en
Pages : 488
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Book Description
