1,720,960 research outputs found
OVERVIEW OF THE PRINCIPLES OF 3D MODELING SYSTEMS
Get PDFGeometric modeling is developing a mathematical development of an object called “model”. This model may
be shown in two dimensional (2D) or in three dimensional (3D). Depending on the application, a 2D model may
completely satisfy the need, but the ideal form of model representation is the 3D model. It is the base of many CAD
/CAM applications such as kinematical analysis of mechanical systems and finite element analysis, NC, CNC programming etc. The geometric modeling plays a major role in full integration and automation of CAD/CAM systems.
This paper describes the principles of 3D modeling systems in order of their evolutionary history, including the main
advantages and disadvantages of each system. Also solid modeling technique is classified due to its popularity and wide adoption in today’s CAD/CAE systems
Role of Sensors in Intelligent Manufacturing Systems
Get PDFGlobalization, exchangeable market requirements and
modern lifestyle trends establish tremendous challenge to
manufacturing industries. Today, the competitiveness of any
manufacturing industry is determined by its ability to respond quickly
to the rapidly changing market and to produce high quality products at
low costs. However, the product cost is no longer the predominant
factor affecting the manufacturers’ perception. Other competitive
factors such as flexibility, quality, efficient delivery and customer
satisfaction are also subject of consideration. Manufacturing industries
have an ambition to achieve these capabilities through automation,
robotics and other innovative concepts. Intelligent manufacturing
systems (IMS) are means to accomplish the requirements such as
reduction of inventories and market-response time to meet customer
demands, flexibility to adapt to the changes in the market, reducing the
cost of products and services to include more market shares as well as
elimination of worker hand intervention. All IMS subsystems are
equipped with highly effective sensors for perceiving inputs and acting
accordingly. This paper defines the components of a simplified
intelligent manufacturing systems (IMS) and illustrates the
classification of the most frequently used kinds of sensors (tactile,
proximity, vision). Correctly selected, installed and trained
(programmed) sensor will significantly extend the operational
capability of the system. Because CAx-technologies” (computer-aided
technologies) are an integral part of every intelligent manufacturing
this paper also presents uses of their integration
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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