Babelsberg Rml

Author by : Felgentreff, Tim
Language : en
Publisher by : Universitätsverlag Potsdam
Format Available : PDF, ePub, Mobi
Total Read : 27
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Description : New programming language designs are often evaluated on concrete implementations. However, in order to draw conclusions about the language design from the evaluation of concrete programming languages, these implementations need to be verified against the formalism of the design. To that end, we also have to ensure that the design actually meets its stated goals. A useful tool for the latter has been to create an executable semantics from a formalism that can execute a test suite of examples. However, this mechanism so far did not allow to verify an implementation against the design. Babelsberg is a new design for a family of object-constraint languages. Recently, we have developed a formal semantics to clarify some issues in the design of those languages. Supplementing this work, we report here on how this formalism is turned into an executable operational semantics using the RML system. Furthermore, we show how we extended the executable semantics to create a framework that can generate test suites for the concrete Babelsberg implementations that provide traceability from the design to the language. Finally, we discuss how these test suites helped us find and correct mistakes in the Babelsberg implementation for JavaScript.


Babelsberg

Author by : Felgentreff, Tim
Language : en
Publisher by : Universitätsverlag Potsdam
Format Available : PDF, ePub, Mobi
Total Read : 32
Total Download : 707
File Size : 44,6 Mb
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Description : Constraints allow developers to specify desired properties of systems in a number of domains, and have those properties be maintained automatically. This results in compact, declarative code, avoiding scattered code to check and imperatively re-satisfy invariants. Despite these advantages, constraint programming is not yet widespread, with standard imperative programming still the norm. There is a long history of research on integrating constraint programming with the imperative paradigm. However, this integration typically does not unify the constructs for encapsulation and abstraction from both paradigms. This impedes re-use of modules, as client code written in one paradigm can only use modules written to support that paradigm. Modules require redundant definitions if they are to be used in both paradigms. We present a language – Babelsberg – that unifies the constructs for en- capsulation and abstraction by using only object-oriented method definitions for both declarative and imperative code. Our prototype – Babelsberg/R – is an extension to Ruby, and continues to support Ruby’s object-oriented se- mantics. It allows programmers to add constraints to existing Ruby programs in incremental steps by placing them on the results of normal object-oriented message sends. It is implemented by modifying a state-of-the-art Ruby virtual machine. The performance of standard object-oriented code without con- straints is only modestly impacted, with typically less than 10% overhead compared with the unmodified virtual machine. Furthermore, our architec- ture for adding multiple constraint solvers allows Babelsberg to deal with constraints in a variety of domains. We argue that our approach provides a useful step toward making con- straint solving a generic tool for object-oriented programmers. We also provide example applications, written in our Ruby-based implementation, which use constraints in a variety of application domains, including interactive graphics, circuit simulations, data streaming with both hard and soft constraints on performance, and configuration file Management.


Babelsberg

Author by : Bärbel Dalichow
Language : en
Publisher by :
Format Available : PDF, ePub, Mobi
Total Read : 79
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File Size : 52,6 Mb
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Literature 1975

Author by : Siegfried Böhme
Language : en
Publisher by : Springer Science & Business Media
Format Available : PDF, ePub, Mobi
Total Read : 66
Total Download : 815
File Size : 50,6 Mb
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Cold War Cultures

Author by : Annette Vowinckel
Language : en
Publisher by : Berghahn Books
Format Available : PDF, ePub, Mobi
Total Read : 42
Total Download : 987
File Size : 53,6 Mb
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Description : The Cold War was not only about the imperial ambitions of the super powers, their military strategies, and antagonistic ideologies. It was also about conflicting worldviews and their correlates in the daily life of the societies involved. The term "Cold War Culture" is often used in a broad sense to describe media influences, social practices, and symbolic representations as they shape, and are shaped by, international relations. Yet, it remains in question whether - or to what extent - the Cold War Culture model can be applied to European societies, both in the East and the West. While every European country had to adapt to the constraints imposed by the Cold War, individual development was affected by specific conditions as detailed in these chapters. This volume offers an important contribution to the international debate on this issue of the Cold War impact on everyday life by providing a better understanding of its history and legacy in Eastern and Western Europe.


The Film Studio

Author by : Ben Goldsmith
Language : en
Publisher by : Rowman & Littlefield Publishers
Format Available : PDF, ePub, Mobi
Total Read : 9
Total Download : 666
File Size : 51,9 Mb
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Description : The Film Studio sheds new light on the evolution of global film production, highlighting the role of film studios worldwide. The authors explore the contemporary international production environment, alleging that global competition is best understood as an unequal and unstable partnership between the 'design interest' of footloose producers and the 'location interest' of local actors. Ben Goldsmith and Tom O'Regan identify various types of film studios and investigate the consequences for Hollywood, international film production, and the studio locations.


100 Years Studio Babelsberg

Author by : Michael Wedel
Language : en
Publisher by : Te Neues Publishing Group
Format Available : PDF, ePub, Mobi
Total Read : 13
Total Download : 686
File Size : 49,7 Mb
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Description : Studio Babelsberg is the eldest large area film studio in the world and the birthplace of the German film industry. A vast amount of world-class movie makers have worked at these sets and produced brilliant, renowned movies. Many actors became stars through Babelsberg. In many different ways has the film studio always promoted the international role of cinema movies though out the years and has been a role model in film technical innovation especially in the fields of Camera techniques and Sound.


The Berlin Crisis 1958 1962

Author by :
Language : en
Publisher by :
Format Available : PDF, ePub, Mobi
Total Read : 41
Total Download : 277
File Size : 51,8 Mb
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Description :