2,981 research outputs found
Integration of Virtual Reality in a Knowledge-based Engineering System for Preliminary Configuration and Quotation of Assembly Lines
No full textRealistic visualization of products is now a must-have for all companies facing worldwide and highly competitive market. Despite Virtual Reality technologies are appealing, its industrial use is still limited to conceptual design and prototyping activities. One of the reason is that generating Virtual Reality (VR) environment is a complex and time-consuming task, especially for complex products or systems. Many technical data are involved in their design and conguration. A meaningful example is the preliminary conguration of assembly lines devoted to deliver a quotation to the customer. To be competitive, the quotation should be completed in tight time and contain variants of the congured system ranging dierent costs. Moreover, high-impact and successful quotation goes beyond the merely technical aspect. In this view, the automatic generation of a virtual reality environment can foster the adoption of this technology in industry, since its setup time is short and doesn't require any skills. In this paper, the integration of a VR module in product conguration and quotation process is proposed. The framework is a Knowledge-based Engineering (KBE) system that, taken the customer requirements as input is able to automatically generate a bunch of dierent solutions. Starting from technical data coming from a KBE system, a virtual environment is generated automatically tting the features of the congured solution. Furthermore, the immersivity of the VR scene is enhanced by integrating the animation of the objects, like robots and pallets. After a brief description of the KBE system, the paper details the information is involved in, the implementation of the VR module and its integration within the KBE framework
Integration of Virtual Reality in a Knowledge-based Engineering Approach for Preliminary Design and Quotation of Assembly Plants
No full textThe worldwide market forces companies to deliver high quality quotation services to their potential customer. In fact, they should provide a range of different offers respecting tight lead-time. If the product to be marketed belongs to the so-called category of the “complex systems”, the bidding process may be challenging. The manufacturing plants are part of that class: their design involves many activities and results in the physical layout of the plant. In the last years, researchers put an increasing effort on Information and Communication Technology (ICT) tools for automatically designing, optimizing and giving quotes of manufacturing plant layout. Knowledge based Engineering (KBE) oriented to automatic configuration of products is a powerful technology can tackle those issues. In literature, many studies treat about advantages of KBE approach and its integration within several industrial environments. Usually, those applications deal with the automatic generation of technical documentation (reports, CAD model, simulation outputs, and so on). Nowadays, high bidding success rates go beyond the merely technical aspect
Italian Art Song Masterclass with Carlo Bergonzi, November 16, 1988
No full textThis is the concert program of the Italian Art Song Masterclass with Carlo Bergonzi performance on Wednesday, November 16, 1988 at 10:00 a.m., at the Boston University Concert Hall, 855 Commonwealth Avenue, Boston, Massachusetts. Works performed were Se tu m'ami by Giovanni Battista Pergolesi, Cangiò d'aspetto, from Admeto by George Frederic Handel, Lascia ch'io pianga, from Rinaldo by George Frederic Handel, Piangerò la sorte mia, from Giulio Cesare by George Frederic Handel, L'alba Separa dalla luca l'omba by Paolo Tosti, Sole e Amore by Giacomo Puccini, and I pastori by Ildebrando Pizzetti. Digitization for Boston University Concert Programs was supported by the Boston University Humanities Library Endowed Fund
Data and Knowledge in IIoT-Based Maintenance Application
No full textAlong with increased digitalization, virtualization of processes and automation in industry, Industrial Internet of Things opens for new possible scenarios and business models. The opportunities of this technology rely, among the others, on new way for data and knowledge management. Knowledge Based Engineering (KBE) is greatly considered to support design activities related to digital technologies. The paper aims at analyzing the role of Industrial Internet of Things for supporting maintenance operations and evaluating whether the adoption of data structure and the integration with the KBE system can face the actual gaps and needs. After a brief overview of different technologies for knowledge management, a possible scenario has been identified. It represents the framework within IIoT technologies can be applied. This conceptual environment considers a multilevel structure: local facilities, the whole company, suppliers, retailers and global network have been involved into the analysis. Upon that scenario, how data and knowledge can be mapped and managed for each level have been investigated. Moreover, these data can be used to improve the predictive maintenance model as well as to enhance the design of new products through the acquisition and monitoring of an effective set of parameters. Finally, in order to demonstrate the feasibility of the proposed approach with the use of simulation as well as physical devices, a prototypical application related to the maintenance of refrigerated display cabinets has been developed.</jats:p
An Augmented Reality Approach to Visualize Biomedical Images
No full textIn the last two decades, the digital revolution has become one of the defining aspects of our current era, to the point that nowadays it is largely regarded as the basis onto which the so called knowledge economy has been building upon. As a matter of fact, the widespread availability of powerful and always cheaper tech devices has allowed the development of Virtual Reality (VR) and Augmented Reality (AR) techniques and applications, opening to new possibilities and solutions in common practices. The core difference between these two is represented by the fact that AR focuses on bringing virtual object and information into real-world environment, whereas VR includes the user into a completely virtual world. The fields of application for these technologies are evolving both in quantity and quality, and despite the fact that they are usually advertised as the new frontier for the entertainment industry, they might eventually play a major role also in other fields, such as design, education and even healthcare. Focusing on healthcare, in recent years many researchers have committed to the development of educational and academic applications for training both students and specialists during difficult patient-specific procedures
An assessment of the impact of possible CAP reform scenarios on Romanian agriculture
No full textUsing a simplified model, with key-variable the prices of two different possible scenarios of CAP reform after 2013 (moderate and radical), this paper present a comparison between the price effects of implementation of each reform scenario at 2015 horizon on Romanian agriculture. This short analysis shows that, under the presented hypotheses, the net welfare effect, due to the price changes, for the selected products, is positive in both reform scenarios, yet greater in the case of the radical reform. Integrated in the large context of Romanian development, it seems that the influence of CAP reform upon agriculture and rural areas will be most likely a gradual one: an interpenetration between the two scenarios is foreseeable, starting with the moderate reform that will dominate the period around 2013, the reform measures acquiring a more radical character afterwards.CAP reform, Romania, welfare effects, Agricultural and Food Policy,
Rich, Sturmian, and trapezoidal words
No full textIn this paper we explore various interconnections between rich words, Sturmian words, and trapezoidal words. Rich words, first introduced by the second and third authors together with J. Justin and S. Widmer, constitute a new class of finite and infinite words characterized by having the maximal number of palindromic factors. Every finite Sturmian word is rich, but not conversely. Trapezoidal words were first introduced by the first author in studying the behavior of the subword complexity of finite Sturmian words. Unfortunately this property does not characterize finite Sturmian words. In this note we show that the only trapezoidal palindromes are Sturmian. More generally we show that Sturmian palindromes can be characterized either in terms of their subword complexity (the trapezoidal property) or in terms of their palindromic complexity. We also obtain a similar characterization of rich palindromes in terms of a relation between palindromic complexity and subword complexity
Cyclopenta[d]isoxazoline β‑Turn Mimics: Synthetic Approach, Turn Driving Force, Scope, and Limitations
No full textModel β-turn inducers were prepared from
constrained oxazanorbornene aminols. Taking advantage of
the starting materials geometry, new diastereoisomeric
compounds were synthesized, introducing different amino
acidic residues. The products were spectroscopically characterized
(VT and NMR titration). Temperature coefficients in
dimethyl sulfoxide denote the existence of an intramolecular
hydrogen bond. Chiroptical properties disclosed a β-turn
arrangement of the synthesized compounds. The fused
isoxazoline ring constraints the cyclopentane moiety, stabilizing
a boatlike conformation that ensures the turn efficiency but limiting the accessibility to hindered amino acids
Characterization Results for the Poset Based Representation of Topological Relations - I: Introduction and Models
No full text@article{DBLP:journals/informaticaSI/ForlizziN99,
author = {Luca Forlizzi and
Enrico Nardelli},
title = {Characterization Results for the Poset Based Representation
of Topological Relations - I: Introduction and Models.},
journal = {Informatica (Slovenia)},
volume = {23},
number = {2},
year = {1999},
bibsource = {DBLP, http://dblp.uni-trier.de}
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