136,242 research outputs found
A Fundamental Scale of Descriptions for Analyzing Information Content of Communication Systems
The complexity of a system description is a function of the entropy of its
symbolic description. Prior to computing the entropy of the system description,
an observation scale has to be assumed. In natural language texts, typical
scales are binary, characters, and words. However, considering languages as
structures built around certain preconceived set of symbols, like words or
characters, is only a presumption. This study depicts the notion of the
Description Fundamental Scale as a set of symbols which serves to analyze the
essence a language structure. The concept of Fundamental Scale is tested using
English and MIDI music texts by means of an algorithm developed to search for a
set of symbols, which minimizes the system observed entropy, and therefore best
expresses the fundamental scale of the language employed. Test results show
that it is possible to find the Fundamental Scale of some languages. The
concept of Fundamental Scale, and the method for its determination, emerges as
an interesting tool to facilitate the study of languages and complex systems.Comment: 29 pages, 2 Tables, 5 Figure
Methodological considerations concerning manual annotation of musical audio in function of algorithm development
In research on musical audio-mining, annotated music databases are needed which allow the development of computational tools that extract from the musical audiostream the kind of high-level content that users can deal with in Music Information Retrieval (MIR) contexts. The notion of musical content, and therefore the notion of annotation, is ill-defined, however, both in the syntactic and semantic sense. As a consequence, annotation has been approached from a variety of perspectives (but mainly linguistic-symbolic oriented), and a general methodology is lacking. This paper is a step towards the definition of a general framework for manual annotation of musical audio in function of a computational approach to musical audio-mining that is based on algorithms that learn from annotated data. 1
Pretty maps: evaluating GIS adoption of cartographic design standards and best practices in professional publications
The nature of GIS maps, as tools designed for visual communication, puts them in the realm of art that is in many ways unique among scientific tools. As a visual form of communication, maps are responsive to methods of visual design, affecting the mapâs appeal and function. Through cartography, a well established body of standards and best-practices exists to help GIS users avoid common design errors and create effective and meaningful maps that support their work. This research examines the adoption rate of those standards amongst professionals using GIS software for creating maps for journal publications. A selection of 80 GIS-produced maps from the AAGâs Professional Geographer were examined and compared to a uniform set of cartographic standards to look for trends in the adoption rates of map design standards amongst GIS map makers. Maps were rated by the author on their use of cartographic standards based on map content and purpose as opposed to their aesthetic quality. The data show trends in GIS cartographic design use that closely follow the inclusion of default values in common GIS software. The implication is that GIS professionals making maps are typically not applying cartographic standards on their own, but mostly following the standards set up in their software of choice. This suggests that there is still significant work to be done in teaching the value of cartographic principles to GIS students and practitioners
Boundary Objects and their Use in Agile Systems Engineering
Agile methods are increasingly introduced in automotive companies in the
attempt to become more efficient and flexible in the system development. The
adoption of agile practices influences communication between stakeholders, but
also makes companies rethink the management of artifacts and documentation like
requirements, safety compliance documents, and architecture models.
Practitioners aim to reduce irrelevant documentation, but face a lack of
guidance to determine what artifacts are needed and how they should be managed.
This paper presents artifacts, challenges, guidelines, and practices for the
continuous management of systems engineering artifacts in automotive based on a
theoretical and empirical understanding of the topic. In collaboration with 53
practitioners from six automotive companies, we conducted a design-science
study involving interviews, a questionnaire, focus groups, and practical data
analysis of a systems engineering tool. The guidelines suggest the distinction
between artifacts that are shared among different actors in a company (boundary
objects) and those that are used within a team (locally relevant artifacts). We
propose an analysis approach to identify boundary objects and three practices
to manage systems engineering artifacts in industry
Practical Strategies for Integrating a Conversation Analyst in an Iterative Design Process
We present a case study of an iterative design process that includes a
conversation analyst. We discuss potential benefits of conversation analysis
for design, and we describe our strategies for integrating the conversation
analyst in the design process. Since the analyst on our team had no previous
exposure to design or engineering, and none of the other members of our team
had any experience with conversation analysis, we needed to build a foundation
for our interaction. One of our key strategies was to pair the conversation
analyst with a designer in a highly interactive collaboration. Our tactics have
been effective on our project, leading to valuable results that we believe we
could not have obtained using another method. We hope that this paper can serve
as a practical guide to those interested in establishing a productive and
efficient working relationship between a conversation analyst and the other
members of a design team.Comment: 11 page
Competency level of technological pedagogical contents knowledge (TPCK) framework amongst graduate teachers
This article propose a framework for educational technology based on Shulmanâs formulation of ââpedagogical content knowledgeââ and extend it to the integration of technology into it. It attempts to capture some of the essential qualities of teacher knowledge required for technology integration in teaching. Briefly, that thoughtful pedagogical uses of technology require the development of a complex, situated form of knowledge that we call Technological Pedagogical Content Knowledge (TPCK). The TPCK framework has much to offer to discussions of technology integration at multiple levels: theoretical, pedagogical, and methodological as well as the complex roles of, and interplay among, three main components of learning environments: content, pedagogy, and technology
Modeling and Evaluation of Multisource Streaming Strategies in P2P VoD Systems
In recent years, multimedia content distribution has largely been moved to the Internet, inducing broadcasters, operators and service providers to upgrade with large expenses their infrastructures. In this context, streaming solutions that rely on user devices such as set-top boxes (STBs) to offload dedicated streaming servers are particularly appropriate. In these systems, contents are usually replicated and scattered over the network established by STBs placed at users' home, and the video-on-demand (VoD) service is provisioned through streaming sessions established among neighboring STBs following a Peer-to-Peer fashion. Up to now the majority of research works have focused on the design and optimization of content replicas mechanisms to minimize server costs. The optimization of replicas mechanisms has been typically performed either considering very crude system performance indicators or analyzing asymptotic behavior. In this work, instead, we propose an analytical model that complements previous works providing fairly accurate predictions of system performance (i.e., blocking probability). Our model turns out to be a highly scalable, flexible, and extensible tool that may be helpful both for designers and developers to efficiently predict the effect of system design choices in large scale STB-VoD system
Painting and Language: A Pictoral Syntax of Shapes
In previous articles, the author proposed that paintings can have syntactic rules. In this article he develops his proposal further and shows that shapes act as syntactic elements in the languages of painting styles. He meets Nelson Goodman\u27s objections to his proposal by showing that shapes meet the criterion of syntactic discreteness proposed by the latter to separate linguistic from other symbolic systems. His approach is to specify style as the domain of a language of painting, to show that style is syntactical and to argue that shapes are the primitive syntactic elements of style. His essay relates current research on the development of syntax for picture-reading machines to the question of syntax for paintings
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