Recursos de colección

Universidad Nacional de La Plata (75.687 recursos)

Este servicio se brinda en el marco del Proyecto de Enlace de Bibliotecas (PrEBi) y significa una novedosa iniciativa en pos de la difusión a través de Internet, dentro y fuera del ámbito de la Universidad, de los conocimientos que en ella se generan para servir como vehículo de promoción y jerarquización. Los objetivos que se han planteados para SeDiCI son sumamente ambiciosos e incluyen la difusion electrónica de tesis, tesinas y disertaciones pero también de otros tipos de creaciones intelectuales, pretendiendo abarcar la ciencia, la tecnología y el arte buscando modos de presentación no solo de objetos en forma de documentos de texto sino también otros medios multimediales aptos para creaciones no documentales.

Mostrando recursos 181 - 200 de 14.249

  1. Estudio de la presencia de integrinas, y su relación con los niveles de esteroides e interleuquinas, durante la placentación porcina

    Williamson, Delia María
    Se estudió la expresión de integrinas en placentas porcinas de diferentes períodos gestacionales y su regulación por hormonas esteroideas y citoquinas. Se determinó integrinas por inmunoperoxidasa, concentración de progesterona por RIA, estrógenos por quimioluminiscencia e interferón-γ, IL-6, IL-12, IL-15 e IL-18 por ELISA. Las integrinas αvβ3 y β3 se encontraron en vellosidades y endometrio hacia los ±37 días, mientras que β1 expresó alta positividad desde los 37 días hasta el final de la preñez. Las glándulas uterinas fueron negativas a α3, mientras que las vellosidades expresaron marcaje durante la gestación. Se halló alta concentración de P4 a partir de los...

  2. Poder de mercado en las profesiones autorreguladas: el desempeño médico en Argentina

    Vezza, Evelyn
    La naturaleza potencialmente anticompetitiva de las prácticas impartidas desde las organizaciones de profesionales ha sido racionalizada por la literatura económica y ha ocupado un lugar no menor en la agenda de los organismos de defensa de la competencia. Sin embargo, la economía empírica carece de estudios sobre el ejercicio profesional autorregulado. Este trabajo relaciona los mercados de servicios profesionales con los modelos de diferenciación vertical y emplea un modelo Logit Mixto para evaluar la conducta del desempeño médico en Argentina. La evidencia hallada sugiere la existencia de algún acuerdo de precios.

  3. Editors: Reza Zanjirani Farahani, Nasrin Asgari, Hoda Davarzani Physica ? Verlag (Springer-Verlag Berlin Heidelberg), 2009 ISBN 978-3-7908-2155-0

    Palma, Ricardo R.

  4. Performance evaluation of applications for heterogeneous systems by means of performance Probes

    Strube, Alexandre Otto

  5. Umpiring security Models for MANETS

    Kathirvel, Ayyaswamy

  6. A novel algorithm with IM-LSI index for incremental maintenance of materialized view

    Rangarajan, K.; Kumaravel, A.; Nalini, T.
    The ability to afford decision makers with both accurate and timely consolidated information as well as rapid query response times is the fundamental requirement for the success of a Data Warehouse. To provide fast access, a data warehouse stores materialized views of the sources of its data. As a result, a data warehouse needs to be maintained to keep its contents consistent with the contents of its data sources. Incremental maintenance is generally regarded as a more efficient way to maintain materialized views in a data warehouse The view has to be maintained to reflect the updates done against the...

  7. Watermarking techniques for protecting intellectual properties in a digital environment

    Aroge, T. K.; Isinkaye, F. O.
    The protection and enforcement of intellectual property rights for digital media has become an important issue in many countries of the world. There is increase in the popularity and accessibility of the Internet to record, edit, replicate and broadcast multimedia content which has necessitated a high demand to protect digital information against illegal uses, manipulations and distributions. Digital watermarking technique which is the process used to embed proprietary information into multimedia digital signal provides a robust solution to this problem. This paper reviews different aspects and techniques of digital watermarking for protecting digital contents. It also explores different application areas...

  8. Mobile-phone based patient compliance system for chronic illness care in Nigeria

    Akinbode, O. P.; Longe, O. L.; Amosa, B.M.G.
    To improve chronic illness care, patients must be empowered and engaged in health self-management. However, only half of all patients with chronic illness comply with treatment programme. The self-regulation model needs practical tools to help patients adopt this selfcentered approach for long-term care. This research work considered a Mobile-phone based Patient Compliance System (MPCS) that can reduce the time-consuming and error-prone processes of existing self-regulation practice to facilitate self-reporting, non-compliance detection, and compliance reminder among patients in Nigeria. The uniqueness of this work is to apply social behavior theories to engineer the MPCS to positively influence patients' compliance behaviors, including...

  9. Probabilistic multicast trees

    Wolff, Francis G.; McIntyre, David R.; Johnston, David A.
    Delivery of the same data content to many clients simultaneously over the Internet continues to be a challenging problem. Multicasting using a single tree structure for data distribution has been shown to be an effective methodology for distribution of data. Using the tree structure to distribute data relieves the source node from the burden of trying to unicast to each client and is efficient because the data delivery burden is distributed over all the participating client nodes. Using multiple tree multicasting further distributes the transmission burden over more participating client nodes and it improves the efficiency of the data distribution....

  10. ICT "Tools" to Improve Quality Assurance in Africa Educational System (Nigeria as Case Study)

    Rufai, M. M.; Adigun, J. O.; Yekini, N. A.
    This research paper uses the terms "tools" to include the computer hardware, software, and connectivity put together under the title Information and Communication Technology (ICT). Authors of this research work considered Indicators of declining quality and wastage in the education system to include; high drop-out and Failure rates, rampant examination malpractices, poor reading and writing skills among students at all levels. The focus of this paper is on how qualitative education can be guaranteed in African schools through the use of ICT to reduce failure rates in examinations. This research work uses the extent to which the graduates of an...

  11. High performance customizable architecture for machine vision applications

    Leiva, Lucas; Acosta, Nelson
    Vision based applications are present anywhere. A special market is industry, allowing to improve product quality and to reduce manufacturing costs. The vision systems applied to industries are known as machine vision systems. These systems must meet time constraints to operate in real time. Generally the production lines are more and more fasters, and the time to process and bring a response is minimal. For this reasons, dedicated architectures are emplaced. In this work a review of several commercial systems is presented, as well a proposed architecture is depicted. The architecture is concern as a customizable platform, avoiding having knowledge...

  12. Concepción de marketing para la exportación de flores frescas cortadas de origen colombiano a la República Argentina

    Prieto Amaya, Oscar Ivan
    Magister en Marketing Internacional

  13. Francisco Rodríguez Adrados. El cuento erótico griego, latino e indio, Madrid, Ediciones del Orto, 1994, 322 pp.

    Pepe de Suárez, Luz Aurelia Enriqueta

  14. M. B. Royo y S. E. Wendt (eds.) Homenaje a Aída Barbagelata. In Memorian, Buenos Aires, Actualidad Producciones, 1994, 2 tomos, 461 y 555 pp.

    Nápoli, Juan Tobías

  15. David Konstan. Greek Comedy and Ideology, Oxford University Press, New York & Oxford, 1995, ix + 244 pp.

    Fernández, Claudia Nélida

  16. Achieving the MDGs in Yemen: an assessment

    Al-Batuly, Abdulmajeed; Al-Hawri, Mohamed; Pournik, Mohammad; Lofgren, Hans; Cicowiez, Martín
    Once the current political crisis in Yemen has been resolved, it will be ever more urgent to speed up progress, including Millennium Development Goal (MDG) achievements. Drawing on simulations with the Maquette for MDG Simulations (MAMS), a model for strategy analysis, and a linked microsimulation model, this paper addresses Yemen's MDG challenges. A first simulation set considers scaled-up government actions with the aim of fully achieving the 2015 international MDG targets with required additional financing from foreign or domestic sources. The main finding is sobering but not surprising: given the required expansion of MDG-related services, on-time achievement of key MDG...

  17. El Impacto distributivo de las políticas sociales

    Gasparini, Leonardo; Galiani, Sebastian
    El objetivo de este trabajo es reseñar brevemente los métodos tradicionales de evaluación del impacto distributivo de las políticas públicas y discutir algunos de los avances más relevantes en los últimos veinte años. El trabajo se concentra en la evaluación de programas sociales, dejando de lado otras intervenciones públicas y su financiamiento. El trabajo resume los progresos a nivel internacional con algunas referencias a la experiencia argentina.

  18. Comparative pharmacokinetic study of ascaridole after oral administration of ascaridole and Jinghuaweikang capsule to rats

    Zhang, Boli; Zhou, Shuiping; Ma, Xiaohui; Wang, Xiangyang; Li, Wei; Chu, Yang; Zhu, Yonghong
    The objective of this study was to compare the pharmacokinetic characteristics of ascaridole following oral administration of pure ascaridole and Jinghuaweikang (JHWK) capsule. Besides, additional rats were given pure ascaridole via intravenous administration for the bioavailability study. The concentration of ascaridole in rat plasma was determined by a GC/MS method. Following oral administration of pure ascaridole and JHWK capsule, the maximum mean concentration in rat plasma (Cmax, 2701.4 ± 1282.6 ng/mL and 3008.0 ± 273.5 ng/mL) were achieved at 0.25 ± 0.09 h and 0.47 ± 0.22 h (Tmax), and the absolute bioavailabilities were approximately 20.8 and 26.9 %, respectively....

  19. Determination of esomeprazole in rabbit plasma by liquid chromatography-mass spectrometry and its application to a pharmacokinetic study

    Zhang, Meiling; Wang, Xuebao; Wang, Zhiyi; Deng, Mingjie; Xu, Zhisheng; Zheng, Yuancai; Zhang, Yuan; Huang, Xueli
    A sensitive and selective liquid chromatography-mass spectrometry (LC–MS) method for determination of esomeprazole in rabbit plasma was developed and validated. After addition of midazolam as internal standard (IS), protein precipitation by acetonitrile was used as sample preparation, and chromatography involved Agilent SB-C18 column (2.1 x 150 mm, 5.0 μm) using 0.1 % formic acid in water and acetonitrile as a mobile phase with gradient elution. Detection involved positive ion mode electrospray ionization (ESI), and selective ion monitoring (SIM) mode was used for quantification of target fragment ions m/z 198 for esomeprazole and m/z 326 for midazolam (internal standard, IS). The...

  20. Quantification of torsemide in rabbit plasma by liquid chromatography/electrospray mass spectrometry and its application

    Hu, Lufeng; Chen, Xiaole; Chen, Chan; Wang, Jinjin; Wang, Zhibin; Wang, Zhiyi
    A sensitive and simple liquid chromatography/electrospray mass spectrometry (LC-ESI-MS) method for determination of torsemide in rabbit plasma using one-step protein precipitation was developed and validated. After addition of midazolam as internal standard (IS), protein precipitation by acetonitrile was used in sample preparation. Chromatographically separation was achieved on an SB-C18 (2.1 mm×150 mm, 5 μm) column with acetonitrile-0.1 % formic acid as the mobile phase with gradient elution. Electrospray ionization (ESI) source was applied and operated in positive ion mode; selected ion monitoring (SIM) mode was used to quantification using target fragment ions m/z 349 for torsemide and m/z 326 for...

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