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Software Abstractions

Software Abstractions
Author: Daniel Jackson
Publisher: MIT Press
Total Pages: 373
Release: 2012
Genre: Computers
ISBN: 0262017156

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An approach to software design that introduces a fully automated analysis giving designers immediate feedback, now featuring the latest version of the Alloy language. In Software Abstractions Daniel Jackson introduces an approach to software design that draws on traditional formal methods but exploits automated tools to find flaws as early as possible. This approach—which Jackson calls “lightweight formal methods” or “agile modeling”—takes from formal specification the idea of a precise and expressive notation based on a tiny core of simple and robust concepts but replaces conventional analysis based on theorem proving with a fully automated analysis that gives designers immediate feedback. Jackson has developed Alloy, a language that captures the essence of software abstractions simply and succinctly, using a minimal toolkit of mathematical notions. This revised edition updates the text, examples, and appendixes to be fully compatible with Alloy 4.


Abstractions and Embodiments

Abstractions and Embodiments
Author: Janet Abbate
Publisher: JHU Press
Total Pages: 473
Release: 2022-08-30
Genre: Computers
ISBN: 1421444372

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"This anthology of original historical essays examines how social relations are enacted in and through computing using the twin frameworks of abstraction and embodiment. The book highlights a wide range of understudied contexts and experiences, such as computing and disability, working mothers as technical innovators, race and community formation, and gaming behind the Iron Curtain"--


Concrete Abstractions

Concrete Abstractions
Author: Max Hailperin
Publisher: Max Hailperin
Total Pages: 686
Release: 1999
Genre: Abstract data types (Computer science).
ISBN: 0534952119

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CONCRETE ABSTRACTIONS offers students a hands-on, abstraction-based experience of thinking like a computer scientist. This text covers the basics of programming and data structures, and gives first-time computer science students the opportunity to not only write programs, but to prove theorems and analyze algorithms as well. Students learn a variety of programming styles, including functional programming, assembly-language programming, and object-oriented programming (OOP). While most of the book uses the Scheme programming language, Java is introduced at the end as a second example of an OOP system and to demonstrate concepts of concurrent programming.


Communication and Agreement Abstractions for Fault-tolerant Asynchronous Distributed Systems

Communication and Agreement Abstractions for Fault-tolerant Asynchronous Distributed Systems
Author: Michel Raynal
Publisher: Morgan & Claypool Publishers
Total Pages: 251
Release: 2010
Genre: Computers
ISBN: 160845293X

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Understanding distributed computing is not an easy task. This is due to the many facets of uncertainty one has to cope with and master in order to produce correct distributed software. Considering the uncertainty created by asynchrony and process crash failures in the context of message-passing systems, the book focuses on the main abstractions that one has to understand and master in order to be able to produce software with guaranteed properties. These fundamental abstractions are communication abstractions that allow the processes to communicate consistently (namely the register abstraction and the reliable broadcast abstraction), and the consensus agreement abstractions that allows them to cooperate despite failures. As they give a precise meaning to the words "communicate" and "agree" despite asynchrony and failures, these abstractions allow distributed programs to be designed with properties that can be stated and proved. Impossibility results are associated with these abstractions. Hence, in order to circumvent these impossibilities, the book relies on the failure detector approach, and, consequently, that approach to fault-tolerance is central to the book. Table of Contents: List of Figures / The Atomic Register Abstraction / Implementing an Atomic Register in a Crash-Prone Asynchronous System / The Uniform Reliable Broadcast Abstraction / Uniform Reliable Broadcast Abstraction Despite Unreliable Channels / The Consensus Abstraction / Consensus Algorithms for Asynchronous Systems Enriched with Various Failure Detectors / Constructing Failure Detectors


Generating Abstraction Hierarchies

Generating Abstraction Hierarchies
Author: Craig A. Knoblock
Publisher: Springer Science & Business Media
Total Pages: 179
Release: 2012-12-06
Genre: Computers
ISBN: 1461531527

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Generating Abstraction Hierarchies presents a completely automated approach to generating abstractions for problem solving. The abstractions are generated using a tractable, domain-independent algorithm whose only inputs are the definition of a problem space and the problem to be solved and whose output is an abstraction hierarchy that is tailored to the particular problem. The algorithm generates abstraction hierarchies that satisfy the `ordered monotonicity' property, which guarantees that the structure of an abstract solution is not changed in the process of refining it. An abstraction hierarchy with this property allows a problem to be decomposed such that the solution in an abstract space can be held invariant while the remaining parts of a problem are solved. The algorithm for generating abstractions is implemented in a system called ALPINE, which generates abstractions for a hierarchical version of the PRODIGY problem solver. Generating Abstraction Hierarchies formally defines this hierarchical problem solving method, shows that under certain assumptions this method can reduce the size of a search space from exponential to linear in the solution size, and describes the implementation of this method in PRODIGY. The abstractions generated by ALPINE are tested in multiple domains on large problem sets and are shown to produce shorter solutions with significantly less search than problem solving without using abstraction. Generating Abstraction Hierarchies will be of interest to researchers in machine learning, planning and problem reformation.


Abstraction

Abstraction
Author: Maria Lind
Publisher: MIT Press
Total Pages: 0
Release: 2013-02-01
Genre: Art
ISBN: 0262518368

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An examination of contemporary art's engagement with three modes of abstraction. This anthology reconsiders crucial aspects of abstraction's resurgence in contemporary art, exploring three equally significant strategies explored in current practice: formal abstraction, economic abstraction, and social abstraction. In the 1960s, movements as diverse as Latin American neo-concretism, op art and “eccentric abstraction” disrupted the homogeneity, universality, and rationality associated with abstraction. These modes of abstraction opened up new forms of engagement with the phenomenal world as well as the possibility of diverse readings of the same forms, ranging from formalist and transcendental to socio-economic and conceptual. In the 1980s, the writings of Peter Halley, Fredric Jameson, and others considered an increasingly abstracted world in terms of its economic, social, and political conditions—all of which were increasingly manifested through abstract codes or sites of style. Such economic abstraction is primarily addressed in art through subject or theme, but Deleuze and Guattari's notion of art as abstract machine opens up possibilities for art's role in the construction of a new kind of social reality. In more recent art, a third strand of abstraction emerges: a form of social abstraction centered on the strategy of withdrawal. Social abstraction implies stepping aside, a movement away from the mainstream, suggesting the possibilities for art to maneuver within self-organized, withdrawn initiatives in the field of cultural production. Artists surveyed include: Lee Bontecou, Louise Bourgeois, Amilcar de Castro, Paul Cézanne, Lygia Clark, Kajsa Dahlberg, Stephan Dillemuth, Marcel Duchamp, Gardar Eide Einarsson, Günther Förg, Liam Gillick, Ferreira Gullar, Jean Hélion, Eva Hesse, Jakob Jakobsen, Jasper Johns, Donald Judd, Wassily Kandinsky, Sol LeWitt, Piet Mondrian, Bruce Nauman, Hélio Oiticica, Blinky Palermo, Lygia Pape, Mai-Thu Perret, Jackson Pollock, Tobias Rehberger, Bridget Riley, Emily Roysden, Lucas Samaras, Julian Stanczak, Frank Stella, Hito Steyerl, Theo van Doesburg Writers include: Alfred H. Barr Jr., Ina Blom, Lynne Cooke, Anthony Davies, Judi Freeman, Peter Halley, Brian Holmes, Joe Houston, Fredric Jameson, Lucy R. Lippard, Sven Lütticken, Nina Möntmann, Gabriel Perez-Barreiro, Catherine Quéloz, Gerald Raunig, Irit Rogoff, Meyer Schapiro, Kirk Varnedoe, Stephan Zepke


Abstraction, Reformulation and Approximation

Abstraction, Reformulation and Approximation
Author: Jean-Daniel Zucker
Publisher: Springer
Total Pages: 387
Release: 2005-08-25
Genre: Computers
ISBN: 3540318828

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This volume contains the proceedings of the 6th Symposium on Abstraction, Reformulation and Approximation (SARA 2005). The symposium was held at Airth Castle, Scotland, UK, from July 26th to 29th, 2005, just prior to the IJCAI 2005 conference in Edinburgh.


Abstraction, Reformulation, and Approximation

Abstraction, Reformulation, and Approximation
Author: Sven Koenig
Publisher: Springer
Total Pages: 352
Release: 2003-08-02
Genre: Computers
ISBN: 3540456228

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It has been recognized since the inception of Artificial Intelligence (AI) that abstractions, problem reformulations, and approximations (AR&A) are central to human common sense reasoning and problem solving and to the ability of systems to reason effectively in complex domains. AR&A techniques have been used to solve a variety of tasks, including automatic programming, constraint satisfaction, design, diagnosis, machine learning, search, planning, reasoning, game playing, scheduling, and theorem proving. The primary purpose of AR&A techniques in such settings is to overcome computational intractability. In addition, AR&A techniques are useful for accelerating learning and for summarizing sets of solutions. This volume contains the proceedings of SARA 2002, the fifth Symposium on Abstraction, Reformulation, and Approximation, held at Kananaskis Mountain Lodge, Kananaskis Village, Alberta (Canada), August 2 4, 2002. The SARA series is the continuation of two separate threads of workshops: AAAI workshops in 1990 and 1992, and an ad hoc series beginning with the "Knowledge Compilation" workshop in 1986 and the "Change of Representation and Inductive Bias" workshop in 1988 with followup workshops in 1990 and 1992. The two workshop series merged in 1994 to form the first SARA. Subsequent SARAs were held in 1995, 1998, and 2000.


Abstraction in Artificial Intelligence and Complex Systems

Abstraction in Artificial Intelligence and Complex Systems
Author: Lorenza Saitta
Publisher: Springer Science & Business Media
Total Pages: 488
Release: 2013-06-05
Genre: Computers
ISBN: 1461470528

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Abstraction is a fundamental mechanism underlying both human and artificial perception, representation of knowledge, reasoning and learning. This mechanism plays a crucial role in many disciplines, notably Computer Programming, Natural and Artificial Vision, Complex Systems, Artificial Intelligence and Machine Learning, Art, and Cognitive Sciences. This book first provides the reader with an overview of the notions of abstraction proposed in various disciplines by comparing both commonalities and differences. After discussing the characterizing properties of abstraction, a formal model, the KRA model, is presented to capture them. This model makes the notion of abstraction easily applicable by means of the introduction of a set of abstraction operators and abstraction patterns, reusable across different domains and applications. It is the impact of abstraction in Artificial Intelligence, Complex Systems and Machine Learning which creates the core of the book. A general framework, based on the KRA model, is presented, and its pragmatic power is illustrated with three case studies: Model-based diagnosis, Cartographic Generalization, and learning Hierarchical Hidden Markov Models.


Architecture and Abstraction

Architecture and Abstraction
Author: Pier Vittorio Aureli
Publisher: MIT Press
Total Pages: 315
Release: 2023-11-07
Genre: Architecture
ISBN: 0262373688

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A landmark study of abstraction in architectural history, theory, and practice that challenges our assumptions about the meaning of abstract forms. In this theoretical study of abstraction in architecture—the first of its kind—Pier Vittorio Aureli argues for a reconsideration of abstraction, its meanings, and its sources. Although architects have typically interpreted abstraction in formal terms—the purposeful reduction of the complexities of design to its essentials—Aureli shows that abstraction instead arises from the material conditions of building production. In a lively study informed by Walter Benjamin, Karl Marx, Alfred Sohn-Rethel, and other social theorists, this book presents abstraction in architecture not as an aesthetic tendency but as a movement that arises from modern divisions of labor and consequent social asymmetries. These divisions were anticipated by the architecture of antiquity, which established a distinction between manual and intellectual labor, and placed the former in service to the latter. Further abstractions arose as geometry, used for measuring territories, became the intermediary between land and money and eventually produced the logic of the grid. In our own time, architectural abstraction serves the logic of capitalism and embraces the premise that all things can be exchanged—even experience itself is a commodity. To resist this turn, Aureli seeks a critique of architecture that begins not by scaling philosophical heights, but by standing at the ground level of material practice.