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Nomenclatura Unesco > (22) Física > (2203) Electrónica
(2203.01) Circuitos (2203.02) Elementos de circuitos
(2203.03) Válvulas electrónicas (2203.04) Microscopía electrónica
(2203.05) Estados electrónicos (2203.06) Transporte de electrones
(2203.07) Circuitos integrados (2203.08) Fotoelectricidad
(2203.09) Piezoelectricidad (2203.99) Otras (especificar)

Categorías relacionadas:
(3307) Tecnología electrónica

Mostrando recursos 1 - 20 de 248,941

1. Output Bound Approximations for Partial Differential Equations; Application to the Incompressible Navier-Stokes Equations - L. Machiels; J. Peraire; A. T. Patera
. We describe an a posteriori finite element procedure for the efficient computation of lower and upper estimators for functional outputs of semilinear elliptic partial differential equations. The general theory is presented, and earlier applications of the procedure to a variety of different problems---including the Poisson equation, the advection-diffusion equation, elasticity problems, the Helmholtz equation, the Burgers equation, and eigenvalue problems---are reviewed. The method is then extended to treat incompressible flow problems, and numerical results are presented for a problem of natural convection in a complex enclosure. 1 Introduction and Motivation In typical design problems, engineers are rarely interested in...

2. Appendix D Visual Parallel Programming in Monads-DPV---Methodology and Case Studies for a Layered Approach - The Paper; Monads-dpv An Object-oriented
y. Technical Report IST/RS-87-196, Information Science Institute, Marina Del Rey, CA, 1987. [SA82] R. Spence and M. Apperly. Data base navigation: An office environment for the professional. Behav. Inf. Technol., 1(1):43--54, January 1982. [Tri88] Horward Trickey. DRAG: A graph drawing system. In International Conference on Electronic Publishing, Document Manipulation, and Typography, pages 421--439, Nice, France, April 1988. Cambridge University Press. [Weg87] Peter Wegner. Dimensions of Object--Based Language Design. In ObjectOriented Programming Systems, Languages, and Applications, pages 168-- 182, Orlando, Florida, October 4--8, 1987. [Wir83] Niklaus Wirth. Programming in Modula-2. Springer-Verlag, Berlin, Heidelberg, New York, second, corrected edition edition, 1983. [WP86]...

3. The Fraction of Subspaces of GF(q)^n with a Specified Number of Minimal Weight Vectors is Asymptotically Poisson - Edward A. Bender; E. Rodney Canfield
The weight of a vector in the finite vector space GF(q) n is the number of nonzero components it contains. We show that for a certain range of parameters (n; j; k; w) the number of k-dimensional subspaces having j(q \Gamma 1) vectors of minimum weight w has asymptotically a Poisson distribution with parameter = \Gamma n w \Delta (q \Gamma 1) w\Gamma1 q k\Gamman . As the Poisson parameter grows, the distribution becomes normal. AMS-MOS Subject Classification (1990). Primary: 05A16 Secondary: 05A15, 11T99 the electronic journal of combinatorics 4 (1997), #R3 2 1. Introduction Almost all the familiar concepts...

4. Text Document Classification with Self-Organizing Maps - Heikki Hyotyniemi
The novel GGHA algorithm automatically extracts sequences of feature vectors from the input data. This approach of presenting complex patterns in terms of their constituent features turns out to be applicable, for example, in modeling of textual documents. In this application, the algorithm becomes an automated `keyword' extraction scheme. A PostScript version of this paper is available also at http://www.hut.fi/~hhyotyni/HH3/HH3.ps 1 Introduction 1.1 Self-organizing maps in document classification The huge number of textual documents available in electronic form emphasizes the need of intelligent information retrieval systems. The traditional This paper was presented at the Symposium on Artificial Networks (Finnish Artificial...

5. Where’s the Beef? The Promise and the Reality of Clinical Documentation - Steven J. Davidson; Frank L. Zwemer; Larry A. Nathanson
Physician-generated emergency department clinical docu-mentation (information obtained from clinician observations and summarized decision processes inclusive of all manner of electronic systems capturing, storing, and presenting clinical documentation) serves four purposes: recording of medical care and communication among providers; pay-ment for hospital and physician; legal defense from medical negligence allegations; and symptom/disease surveillance, public health, and research functions. In the consensus development process described by Handler, these objectives were balanced with the consideration of efficiency, often evaluated as physician time and clinical documentation system costs, in recording the information necessary for their accomplishment. The consensus panel session partici-

6. Twodimensional and three-dimensional integration of heterogeneous electronic systems under cost, performance, and technological constraints - Roshan Weerasekera; Dinesh Pamunuwa; Li-rong Zheng; Hannu Tenhunen
Abstract—Present day market demand for high-performance high-density portable hand-held applications has shifted the focus from 2-D planar system-on-a-chip-type single-chip solutions to al-ternatives such as tiled silicon and single-level embedded modules as well as 3-D die stacks. Among the various choices, finding an optimal solution for system implementation deals usually with cost, performance, power, thermal, and technological tradeoff analyses at the system conceptual level. It has been estimated that decisions made in the first 20 % of the design cycle influence up to 80 % of the final product cost. In this paper, we discuss realistic metrics appropriate for performance and...

7. BULLETIN A publication to promote communication among Stata users Editor Associate Editors - H. Joseph; Newton Nicholas; J. Cox
subscription prices are posted at www.stata.com/bookstore/stb.html. Previous Issues are available individually from StataCorp. See www.stata.com/bookstore/stbj.html for details. Submissions to the STB, including submissions to the supporting files (programs, datasets, and help files), are on a nonexclusive, free-use basis. In particular, the author grants to StataCorp the nonexclusive right to copyright and distribute the material in accordance with the Copyright Statement below. The author also grants to StataCorp the right to freely use the ideas, including communication of the ideas to other parties, even if the material is never published in the STB. Submissions should be addressed to the Editor. Submission...

8. Use of Internet - S. Thanuskodi; S. Ravi; S. Thanuskodi; Dr. S. Ravi
Internet, computer-based worldwide information network. At the dawn of information age, professionals are experiencing new vigor in field of information collection, processing and retrieval. The internet considered as the electronic mobile library in cyberspace provides an almost universal infrastructure for

9. PAPERS IN CULTURE - Itamar Even-zohar; Itamar Even-zohar
This is a temporary electronic version and is likely to change. Please check the latest version before quoting. All rights reserved. No part of this book may be reprduced in any form, by photostat, microform, retrieval system, or any other means, without prior written permission of the publisher. Permission is however granted here-with to print out this book or parts thereof for personal

10. ALL SOFTWARE AND DOCUMENTATION (WHETHER IN HARD COPY OR ELECTRONIC FORM) ENCLOSED AND ON THE COMPACT DISC(S) ARE SUBJECT TO THE LICENSE
The documentation stored on the compact disc(s) may be printed by Ten to TimesTen Replication Guide licensee for licensee’s internal use only. Except for the foregoing, no part of this documentation (whether in hard copy or electronic form) may be reproduced or transmitted in any form by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without the prior written permission of TimesTen Inc. Oracle, JD Edwards, PeopleSoft, Retek, TimesTen, the TimesTen icon, MicroLogging and Direct Data Access are trademarks or reg-istered trademarks of Oracle Corporation and/or its affiliates. Other names may be trademarks...

11. Contents - Thomas J. Misa; Philip Brey; Andrew Feenberg; Andrew Feenberg; Thomas J. Misa
All rights reserved. No part of this book may be reproduced in any form by any electronic or mechanical means (including photocopying, recording, or information storage and retrieval) without permission in writing from the publisher. This book was set in Sabon by UG / GGS Information Services. Printed and bound in the United States of America.

12. The dream of staying clean: Lotus and biomimetic surfaces - Andreas Solga; Zdenek Cerman; Boris F Striffler; Manuel Spaeth; Wilhelm Barthlott
The Lotus has been the symbol of purity for thousands of years; contaminations and pathogens are washed off the surfaces of Lotus and some other plants with rain or even dew. After the introduction of scanning electron microscopy, we were able to resolve the mechanism behind this phenomenon. It took some further decades before in-depth studies on self-cleaning with plants were conducted and the effect could be understood in detail. We identified extreme water-repellency (‘superhydrophobicity’), characterized by very high contact angles and low sliding angles, as the prerequisite for self-cleaning properties. We could show that the combination of two factors...

13. Design Needs of A Solar PV System For Winton – Queensland, - Adrianus Amheka
To build a solar PV power plant in Winton the feasibility of installing a centralized of the system is required to investigated in order to replacing gensets with a solar PV/battery installation that will meet the town’s needs. The PV modules will last 20 years, the other major electronic components 10 years and the batteries will be replaced every 7 years. The estimate of the costs of gensets installed at the site is very high. Maintenance is also high on these units in remote area. Estimate of the maintenance costs should to considered clearly. The inflation rate as 4.5 %...

14. Electronic transport properties of individual chemically reduced graphene oxide sheets. Nano Lett - R. Thomas Weitz; Er M. Bittner; Matteo Scolari; Alf Mews; Marko Burghard; Klaus Kern
Individual graphene oxide sheets subjected to chemical reduction were electrically characterized as a function of temperature and external electric fields. The fully reduced monolayers exhibited conductivities ranging between 0.05 and 2 S/cm and field effect mobilities of 2− 200 cm2/Vs at room temperature. Temperature-dependent electrical measurements and Raman spectroscopic investigations suggest that charge transport occurs via variable range hopping between intact graphene islands with sizes on the order of several nanometers. Furthermore, the comparative study of multilayered sheets revealed that the conductivity of the undermost layer is reduced by a factor of more than 2 as a consequence of the...

15. Dynamic hedging of portfolio credit risk in a Markov copula model (working paper - Tomasz R. Bielecki; Areski Cousin; Stéphane Crépey; J Optim; Stéphane Crépey Alex; Er Herbertsson; T. R. Bielecki
Your article is protected by copyright and all rights are held exclusively by Springer Science +Business Media New York. This e-offprint is for personal use only and shall not be self-archived in electronic repositories. If you wish to self-archive your article, please use the accepted manuscript version for posting on your own website. You may further deposit the accepted manuscript version in any repository, provided it is only made publicly available 12 months after official publication or later and provided acknowledgement is given to the original source of publication and a link is inserted to the published article on Springer's...

16. ISSN: 1083-589X ELECTRONIC COMMUNICATIONS in PROBABILITY Erratum: - Clément Foucart
The impact of selection in the Λ-Wright-Fisher model

17. Design Requirements for a Patient Administered Personal Electronic Health Record - Rune Fensli; Vladimir Oleshchuk
It is anticipated that the patient’s access to his/her own medical records and treatment information in the future will play an important role in managing treatment of chronic diseases and protecting patients ’ health as described by Coulter et al. (2008). Shared access to electronic health records will thus be important for obtaining electronic collaboration,

18. Book Reviews k Documents - Power In A Union; Call For Papers
Articles, book reviews, bibliographies, reports, documents, artwork and poetry that explore progressive perspectives on librarianship and information issues are wanted for future issues of Progressive Librarian. Please submit electronic-files via e-mail, CD-ROM or floppy as Rich Text Format (.rtf) or Microsoft Word (.doc). Typewritten manuscripts are welcome. Prints and digital images also welcome, if digital provide 300 dpi grayscale TIFF (.tiff) files no larger than 5x7 inches. Use your favorite citation style for references. Just be consistent, please. Also, authors must include contact info (e-mail, phone & mailing address) on title page. Article submissions to Progressive Librarian are reviewed by...

19. THE DEVELOPMENT OF STABLE INFLUENZA VACCINE POWDER FORMULATIONS FOR NEW NEEDLE-FREE DOSAGE FORMS - Jean-pierre Amorij; Paranimfen Armand Amorij; Micha Hartenhof; Lutea De Jong; Cover Design Jean-pierre Amorij; Chapter I Introduction
No part of this book may be reproduced or transmitted in any form or by any means wit-hout prior written permission of the author. ISBN: 978-90-367-3238-3 (electronic version) 978-90-367-3239-0 (hardcopy) Cover: Kaleidoscopic presentation of a particle of spray-freeze dried subunit vaccine powder (using a Scanning Electron Micrograph with a magnification of 5000x).

20. Review Chemical Sensors for Electronic Nose Systems - David James; Simon M. Scott; Zulfiqur Ali; William T. O’hare
Abstract. Chemical sensors have been widely used for the analysis of volatile organic compounds. Employing chemical sensors in an array format with pattern re-cognition provides a higher degree of selectivity and reversibility leading to an extensive range of applica-tions. When such systems are used for odour analysis they are termed ‘electronic noses’. Application of elec-tronic noses ranges from the food industry, medical industry to environmental monitoring and process con-trol. Many types of different gas sensors have been employed in the array. These include conducting poly-mers, metal oxide semiconductors, piezoelectric, opti-cal fluorescence and amperometric gas sensors The transducer principle of these...

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