7,841 research outputs found

    La socialización del patrimonio bibliográfico y documental de la humanidad desde la perspectiva de los derechos culturales

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    The socialization of cultural expressions refers to society having access, knowing, appreciating, and reasonably using cultural events and documentaries worldwide. Cultural rights are inherent attributes of society that enable cultural value, experiential demonstrations and reasonably tangible and intangible representations. From this understanding, cultural rights are conducive to socializing the documentary heritage because -among other contributions- they provide access to information, the assessment of documents and the preservation of information in all its manifestations. The overall objective of this document is to analyze some key to socialize bibliographic and documentary heritage of humanity. The particular aim of this paper is to reflect on the socialization of documentary heritage from the viewpoint of the cultural rights, educational trends related to the rights and heritage, and the action on the issue from a library science approach. This document is divided into four sections. The first addresses the fundamental concepts of bibliographic and documentary heritage. The second contains the corresponding to the socialization of the documentary memory. The third is the relationship between cultural rights, libraries and documentary heritage. Finally, we analyze the mission of librarians regarding the socialization of documentary heritage.La socialización de las expresiones culturales se refiere a que la sociedad tenga acceso, conozca, aprecie y usufructúe razonadamente las manifestaciones culturales y documentales mundiales. Los derechos culturales son atributos inherentes de la sociedad, que posibilitan valorar cultural, vivencial y razonadamente las manifestaciones y las representaciones tangibles e intangibles. A partir de esta comprensión, los derechos culturales son propicios para socializar el patrimonio documental, debido a que –entre otras contribuciones- posibilitan el acceso a la información, la valoración de los documentos y la preservación de la información en todas sus manifestaciones. El objetivo general de este documento es analizar algunas acciones fundamentales para socializar el patrimonio bibliográfico y documental de la humanidad. El objetivo particular de este trabajo, es reflexionar sobre la socialización del patrimonio documental desde el enfoque de los derechos culturales, las tendencias educativas relacionadas con los derechos y el patrimonio, así como las acciones en torno al tema desde un enfoque bibliotecológico. Este documento se estructura en cuatro apartados. El primero, aborda los conceptos fundamentales sobre el patrimonio bibliográfico y documental. El segundo, contiene lo respectivo a la socialización de la memoria documental. El tercero, trata la relación entre los derechos culturales, las bibliotecas y la herencia documental. Finalmente, se analiza la misión de los bibliotecólogos respecto a la socialización del patrimonio documental

    El impacto de las tecnologías de la información en la cultura: una visión bibliotecològica

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    The aim of this paper is to reflect on technology and culture, the same study highlights the need to rethink the concepts of these areas, and at the same time mainstreamed in order to understand the dynamics of culture in the knowledge society. This paper is divided into four sections. The first contains some history of technology and its influence on modern thought. The second part is concerning the information society and knowledge. The third section discusses the concepts of culture, technology, linking between socialization and culture. The fourth part deals with the relationship between ICT culture and librarianship. Finally, concluding remarks are provided

    Probing the Large Magellanic Cloud's recent chemical enrichment history through its star clusters

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    We present Washington system colour-magnitude diagrams (CMDs) for 17 practically unstudied star clusters located in the bar as well as in the inner disc and outer regions of the Large Magellanic Cloud (LMC). Cluster sizes were estimated from star counts distributed throughout the entire observed fields. Based on the best fits of theoretical isochrones to the cleaned (CT1,T1)(C-T_1,T_1) CMDs, as well as on the δT1\delta T_1 parameter and the standard giant branch method, we derive ages and metallicities for the cluster sample. Four objects are found to be intermediate-age clusters (1.8-2.5 Gyr), with [Fe/H] ranging from -0.66 to -0.84. With the exception of SL263, a very young cluster (\sim 16 Myr), the remaining 12 objects are aged between 0.32 and 0.89 Gyr, with their [Fe/H] values ranging from -0.19 to -0.50. We combined our results with those for other 231 clusters studied in a similar way using the Washington system. The resulting age-metallicity relationship shows a significant dispersion in metallicities, whatever age is considered. Although there is a clear tendency for the younger clusters to be more metal-rich than the intermediate ones, we believe that none of the chemical evolution models currently available in the literature reasonably well represents the recent chemical enrichment processes in the LMC clusters. The present sample of 17 clusters is part of our ongoing project of generating a database of LMC clusters homogeneously studied using the Washington photometric system and applying the same analysis procedureComment: 11 pages, 20 figures, 3 tables, Accepted for publication in MNRA

    A sample of relatively unstudied star clusters in the Large Magellanic Cloud: fundamental parameters determined from Washington photometry

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    To enlarge our growing sample of well-studied star clusters in the Large Magellanic Cloud (LMC), we present CCD Washington CT1 photometry to T1 ~ 23 in the fields of twenty-three mostly unstudied clusters located in the inner disc and outer regions of the LMC. We estimated cluster radii from star counts. Using the cluster Washington (T1,C-T1) colour-magnitude diagrams, statistically cleaned from field star contamination, we derived cluster ages and metallicities from a comparison with theoretical isochrones of the Padova group. Whenever possible, we also derived ages using delta_T1 - the magnitude difference between the red giant clump and the main sequence turn off - and estimated metallicities from the standard giant branch procedure. We enlarged our sample by adding clusters with published ages and metallicities determined on a similar scale by applying the same methods. We examined relationships between their positions in the LMC, ages and metallicities. We find that the two methods for age and metallicity determination agree well with each other. Fourteen clusters are found to be intermediate-age clusters (1-2 Gyr), with [Fe/H] values ranging from -0.4 to -0.7. The remaining nine clusters turn out to be younger than 1 Gyr, with metallicities between 0.0 and -0.4. Our 23 clusters represent an increase of ~ 30% in the current total amount number of well-studied LMC clusters using Washington photometry. In agreement with previous studies, we find no evidence for a metallicity gradient. We also find that the younger clusters were formed closer to the LMC centre than the older ones.Comment: 11 pages, 10 figures. A&A, in pres

    Mechanism of Alkyl Migration in Diorganomagnesium 2,6-Bis(imino)pyridine Complexes: Formation of Grignard-Type Complexes with Square-Planar Mg(II) Centers

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    Dialkylmagnesium compounds [MgR2L2] (R = n-Bu, L = none or R = Bn, L = THF) react with 2,6-bis(imino)pyridines (BIP) to afford different types of Mg(II) alkyl complexes, depending on the nature of R. For R = n-Bu, thermally stable products resulting from selective alkyl transfer to the pyridine nitrogen (N1) atom are obtained. However, NMR studies showed that the reaction of [Mg(Bn)2THF2] with iPrBIP at −65 °C leads to a thermally unstable product arising from benzyl migration to position C2 in the pyridine ring. Above +5 °C, this compound rearranges, cleanly yielding a mixture of two isomeric complexes, in which the benzyl group has migrated to positions C3 or C4 of the central ring, respectively. Similar isomeric mixtures were obtained when [Mg(Bn)2THF2] was reacted with iPrBIP or MesBIP at room temperature. Such mixtures are thermally stable below 80 °C, but at this temperature, the 3-benzyl isomer converts into the thermodynamically favored 4-benzyl product, albeit not quantitatively. An alternate route was devised for the selective syntheses of the latter type of compounds. The X-ray diffraction structure of one of them provided an unusual example of a square-planar alkylmagnesium(II) center.Ministerio de Economía e Innovación CTQ2015-68978-

    Oxygen-Induced Dimerization of Alkyl-Manganese(II) 2,6-Bisiminopyridine Complexes: Selective Synthesis of a New Ditopic NNN-Pincer Ligand

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    The outcome of the reaction of manganese(II) dialkyls with 2,6-bisiminopyridine (BIP) ligands is dramatically altered by the presence of very small amounts of oxygen (< 0.5 mol %), leading to binuclear species. These arise from the dimerization of the initial product, a Mn(II) 4-alkyl-2,6-bisiminodihydropyridinate alkyl complex. Cleavage of the binuclear Mn products with methanol affords the free dimeric bases, which can be regarded as a special type of ditopic NNN pincer ligand with an unusual tricyclic framework. The coordinative ability of the new ligands has been probed with the syntheses of Zn and Pd organometallic derivativesMinisterio de Economía e Innovación TQ2015- 68978-

    La nueva norma une-en ISO 9001:2000. Una aplicación en empresas de jardinería.

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    El 15 de diciembre de 2.000 salen a la luz las nuevas normas UNE-EN ISO 9001:2000, que pretenden superar algunos de los problemas y avanzar en la mejora de las antiguas normas. El modelo ISO 9000/94 planteaba graves problemas para la implantación, espec

    Mechanotransduction in tumor dynamics modeling

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    [Abstract:] Mechanotherapy is a groundbreaking approach to impact carcinogenesis. Cells sense and respond to mechanical stimuli, translating them into biochemical signals in a process known as mechanotransduction. The impact of stress on tumor growth has been studied in the last three decades, and many papers highlight the role of mechanics as a critical self-inducer of tumor fate at the in vitro and in vivo biological levels. Meanwhile, mathematical models attempt to determine laws to reproduce tumor dynamics. This review discusses biological mechanotransduction mechanisms and mathematical-biomechanical models together. The aim is to provide a common framework for the different approaches that have emerged in the literature from the perspective of tumor avascularity and to provide insight into emerging mechanotherapies that have attracted interest in recent years.This paper has been partially supported by the MINECO-FEDER (Spain) research grant number EQC2018-004508-P, PID2019-106947RA-C22 (B.B., J.M., G.R.) and RTI2018-098850-B-I00 (J.S.). This study was also funded by Ministry of Science, Innovation and Universities of Spain, project numbers PID2020-115372RB-I00 (B.B., G.R.), Consejería de Innovación, Ciencia y Empresa, Junta de Andalucía P18-RT-1653 (B.B., J.M., G.R.), PY18-RT-2422 & B-FQM-580-UGR20 (J.S.), and by Consejería de Universidad, Investigación e Innovación from Junta de Andalucía, P21.00182 (B.B., J.M., G.R.). Lastly, B.B. research was granted by the Ministry of Science, Innovation and Universities of Spain, FPU2017/01415. Funding for open access charge: Universidad de Granada / CBUA. Figures were created with Biorender.com.Junta de Andalucía; P18-RT-1653Junta de Andalucía; PY18-RT-2422Junta de Andalucía; B-FQM-580-UGR20Junta de Andalucía; P21.0018

    Análisis de la percepción de la amenaza volcánica del volcán Momotombo-Puerto Momotombo

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    El presente trabajo se realizo en la comarca de Puerto Momotombo y sus alrededores, localización en las cercanias del volcán Momotombo. Esta investigación analiza la percepción de la amenaza volcánica que poseeen las personas, el actuar ante un posible evento eruptivo y los conocimientos referentes de instituciones encargadas de brindar información y ejecutar planes de contingencia. También analiza áreas que se encuetran en amenaza de darse una erupción por parte del volcán Momotombo. Este trabajo fue apoyado, principalmente por una encuesta la cual fue aplicada en campo a personas tomadas al azar, donde se obtuvieron datos que fueron procesados mediante tablas de cálculo y presentados en grpaficos y tablas, cada uno de estos consu debida interpretación. También se utilizaron estudios previos acerca de amenaza volcánica y software de simulación para la elaboración de los mapas de amenaza para esta zona. El análisis indicó que la gran mayoría de los encuestados no se encuentran lo suficiente preparados para enfrentar una erupción volcánica, debeido a que poseen muy poca información concerniente al volcán y del actuar ante una emergencia, esto debid a que nunca han vivido una erupción de este volcán y la única información que perciben es através de los medios de comunicación. Espor eso qe al momento de entrar en acividad el volcán podrían tomar decisiones que pueden llevar a tyragedias de un volcán, para reducir el indice de víctimas fatales ya que la percepción de una ersona común no es la misma que la de un científic
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