15,303 research outputs found
A machine vision extension for the Ruby programming language
Dynamically typed scripting languages have become popular in recent years. Although interpreted languages allow for substantial reduction of software development time, they are often rejected due to performance concerns.
In this paper we present an extension for the programming
language Ruby, called HornetsEye, which facilitates the development
of real-time machine vision algorithms within Ruby. Apart from providing integration of crucial libraries for input and output, HornetsEye provides fast native implementations (compiled code) for a generic set of array operators. Different array operators were compared with equivalent implementations in C++. Not only was it possible to achieve comparable real-time performance, but also to exceed the efficiency of the C++ implementation in several cases.
Implementations of several algorithms were given to demonstrate
how the array operators can be used to create concise
implementations.</p
Objective Styles in Northern Field Science
Social studies of science have often treated natural field sites as extensions of the laboratory. But this overlooks the unique specificities of field sites. While lab sites are usually private spaces with carefully controlled borders, field sites are more typically public spaces with fluid boundaries and diverse inhabitants. Field scientists must therefore often adapt their work to the demands and interests of local agents. I propose to address the difference between lab and field in sociological terms, as a difference in style. A field style treats epistemic alterity as a resource rather than an obstacle for objective knowledge production. A sociological stylistics of the field should thus explain how objective science can co-exist with radical conceptual difference. I discuss examples from the Canadian North, focussing on collaborations between state wildlife biologists and managers, on the one hand, and local Aboriginal Elders and hunters, on the other. I argue that a sociological stylistics of the field can help us to better understand how radically diverse agents may collaborate across cultures in the successful production of reliable natural knowledge
Perspectives for Electronic Books in the World Wide Web Age
While the World Wide Web (WWW or Web) is steadily expanding, electronic books (e-books) remain a niche market. In this article, it is first postulated that specialized contents and device independence can make Web-based e-books compete with paper prints; and that adaptive features that can be implemented by client-side computing are relevant for e-books, while more complex forms of adaptation requiring server-side computations are not. Then, enhancements of the WWW standards (specifically of XML, XHTML, of the style-sheet languages CSS and XSL, and of the linking language XLink) are proposed for a better support of client-side adaptation and device independent content modeling. Finally, advanced browsing functionalities desirable for e-books as well as their implementation in the WWW context are described
Debugging Native Extensions of Dynamic Languages
Many dynamic programming languages such as Ruby and Python enable developers
to use so called native extensions, code implemented in typically statically
compiled languages like C and C++. However, debuggers for these dynamic
languages usually lack support for also debugging these native extensions.
GraalVM can execute programs implemented in various dynamic programming
languages and, by using the LLVM-IR interpreter Sulong, also their native
extensions. We added support for source-level debugging to Sulong based on
GraalVM's debugging framework by associating run-time debug information from
the LLVM-IR level to the original program code. As a result, developers can now
use GraalVM to debug source code written in multiple LLVM-based programming
languages as well as programs implemented in various dynamic languages that
invoke it in a common debugger front-end.Comment: 7 pages, 7 figures, accepted at 15th International Conference on
Managed Languages & Runtimes (ManLang'18
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