bluuebunny/crossref_metadata_2025 huggingface dataset:
Engagement et construction de soi. La carrière d'émancipation d'un permanent communiste
Authors: Leclercq Catherine
Published: January 2012

L’analyse de la construction identitaire des individus dans les organisations offre un prolongement à la recherche sur les rétributions du militantisme, laquelle s’est encore peu intéressée aux transformations de l’image de soi et aux logiques d’émancipation qui sont à l’œuvre dans les carrières militantes. S’il est vrai que l’engagement agit en permanence sur la perception de soi, ce « travail de l’identité » conditionne en retour le rapport au rôle militant, parfois dans le sens d’une réflexivité critique génératrice de défection. L’étude des « carrières du désengagement » permet de cerner les mécanismes de ce processus et d’éclairer la question des incidences biographiques du militantisme sous l’angle de la modification, dans et par l’engagement , des déterminants objectifs et subjectifs qui l’avaient initialement rendu possible. Cette réflexion, qui s’appuie sur le cas d’un ancien permanent du Parti communiste français, montre comment les ressources accumulées pendant une phase d’investissement total peuvent « se retourner » contre l’engagement en produisant les conditions d’un accomplissement individuel hors l’institution.
Genre, classe, nationalité et accès des femmes aux espaces publics à Riyad
Authors: Le Renard Saba A.
Published: January 2012

La capitale de l’Arabie Saoudite, Riyad, est caractérisée par une ségrégation de genre très poussée et qui s’applique plus strictement aux Saoudiens qu’aux non-Saoudiens. L’article montre comment l’accès de certaines Saoudiennes à des espaces publics contribue à renforcer et/ou à recomposer des hiérarchies sociales qui articulent genre, classe et nationalité. Si des attentes fort contraignantes pèsent sur leurs conduites en tant que Saoudiennes par opposition aux résidentes étrangères, elles parviennent en exerçant une activité rémunérée à adopter des styles de vie mobiles et consuméristes, ce qui renforce et renouvelle les clivages.
Efecto de la adición de hierro sobre la estructura cristalina de la fase α-AlFeMnSi formada en el sistema cuaternario Al-Fe-Mn-Si
Authors: Orozco-González P. , Castro-Román M. , López-Cuevas J. , Hernández-Rodríguez A. , Muñiz-Valdez R. , Luna-Álvarez S. , Ortiz-Cuellar C.
Published: January 2012

Las fases α de estructura cristalina cúbica y hexagonal, formadas durante los ensayos de análisis térmico y tratamientos isotérmicos específicos, han sido analizadas para una serie de aleaciones Al-Mn-Si con diferente contenido de hierro. En estas aleaciones, la relación en peso Fe/Mn se varió de 0,1 a 8,4. Este estudio muestra que las aleaciones Al-13,4Si-1,1 Mn-Fe con relación en peso Fe/Mn menor o igual a 4, la fase a presenta estructura cristalina cúbica, mientras que en aleaciones con una relación Fe/Mn igual o mayor a 5,3, la fase a presenta estructura cristalina hexagonal. Por lo tanto, la relación crítica Fe/Mn para la transición de estructura cristalina de cúbica a hexagonal se encuentra entre 4 y 5,3 para las aleaciones estudiadas.
Investigaciones sobre la influencia de la escoria sobre el rendimiento de eliminación del hidrógeno
Authors: Drǎgoi F. , Socalici A. , Ardelean E. , Popa E. , Heput T.
Published: January 2012

La técnica moderna necesita cada vez más acero de calidad superior y aceros especiales, con propiedades adecuadas a unos propósitos muy amplios. Gracias a la interdependecia entre los factores que determinan el contenido de gases esta constituye un problema cada vez más importante para la elaboración, tratamiento y fundición de los aceros. Una gran importancia en el proceso de elaboración le corresponde a la escoria independientemente de la fase del proceso. Se analiza la influencia de la escoria sintética durante el tratamiento en la instalación LF sobre el grado de eliminación del hidrogeno. Después de procesar los datos experimentales se establecieron los campos óptimos de variación de la basicidad en base a la cual se puede determinar la composición química de la escoria (CaO, SiO2, Al2O3, MgO) para el tratamiento secundario del acero.
MODULATING EFFECT OF THE −158 GΓ (C→T) XMN-1 POLYMORPHISM IN INDIAN SICKLE CELL PATIENTS
Authors: Pandey Sanjay , Pandey Sweta , Mishra Rahasya Mani , Saxena Renu
Published: January 2012

Xmn-1 polymorphism is a known factor, which increases fetal haemoglobin production. Among the inherited disorders of blood, thalassaemia and SCD constitutes a major bulk of genetic diseases in India.  Our aim was to verify the role of the Xmn I polymorphism as a modulating factor in sickle cell patients and frequency of the polymorphism in Indian sickle cell patients. Subjects were 60 sickles homozygous and 75 sickle beta thalassemia patients. 5 ml blood   samples collected from patients. Screening of sickle patients done by HPLC. An automated cell analyzer SYSMEX (K-4500 Model) used to analyze the CBC of patients.Xmn1 polymorphism analysis done by PCR-RFLP and Statistical analysis was performed on GraphPad static’s software. t test applied to compare the means amongst group. Among the sickle homozygous 27 were   heterozygous (+/-) and 19 were   homozygous (+/+) while 30 were heterozygous and 24 were homozygous in sickle β-thalassemia patients. Extremely significant differences (p-value <0.001) of hematological parameters seen among patient with xmn-1 carrier and without the xmn-1 carrier. In our cases the clinical symptom less frequent and higher HbF level with Xmn-1 carriers. Presence of Xmn-1 polymorphism in sickle patients with higher HbF that improve phenotypic presentation in the sickle cell patients. We conclude that the phenotype of Indian sickle cell patients influenced by Xmn-1 polymorphism.
Interpreting the visio Dei in Matthew 5:8
Authors: Viljoen Francois P.
Published: January 2012

The academic study of the biblical text often depends on the naïve assumption that a researcher can obtain stable knowledge of the single meaning of a text. This article investigated how the visio Dei in Matthew 5:8 has led to a variety of concepts through the centuries. This proves how different readers come to different readings. Interpreters should be aware of how their contexts impact on their understanding of meaning, but should also realise how taking cognisance of the wide variety of readings could enrich their own interpretation.
Strict sub-solutions and Mañé potential in discrete weak KAM theory
Authors: Zavidovique Maxime
Published: January 2012

In this paper, we explain some facts on the discrete case of weak KAM theory. In that setting, the Lagrangian is replaced by a cost

c\colon X\times X \rightarrow \mathbb{R}

, on a “reasonable” space

X

. This covers for example the case of periodic time-dependent Lagrangians. As is well known, it is possible in that case to adapt most of weak KAM theory. A major difference is that critical sub-solutions are not necessarily continuous. We will show how to define a Mañé potential. In contrast to the Lagrangian case, this potential is not continuous. We will recover the Aubry set from the set of continuity points of the Mañé potential, and also from critical sub-solutions.
Height pairings, exceptional zeros and Rubin’s formula: the multiplicative group
Authors: Büyükboduk Kâzim
Published: January 2012

In this paper we prove a formula, much in the spirit of one due to Rubin, which expresses the leading coefficients of various

p

-adic

L

-functions in the presence of an exceptional zero in terms of Nekovář’s

p

-adic height pairings on his extended Selmer groups. In a particular case, the Rubin-style formula we prove recovers a

p

-adic Kronecker limit formula. In a disjoint case, we observe that our computations with Nekovář’s heights agree with the Ferrero–Greenberg formula (more generally, Gross’ conjectural formula) for the leading coefficient of the Kubota–Leopoldt

p

-adic

L

-function (resp., the Deligne–Ribet

p

-adic

L

-function) at

s=0

.
The Dolgachev surface
Authors: Akbulut Selman
Published: January 2012

We prove that the Dolgachev surface

E(1)_{2,3}

admits a handlebody decomposition without 1- and 3-handles, and we draw the explicit picture of this handlebody. We also locate a “cork” inside of

E(1)_{2,3}

, so that

E(1)_{2,3}

is obtained from

E(1)

by twisting along this cork.
La conjecture de Baum–Connes à coefficients pour les groupes hyperboliques
Authors: Lafforgue Vincent
Published: January 2012

This paper gives a proof of the Baum–Connes conjecture with coefficients for hyperbolic groups. More precisely the injectivity of the Baum–Connes map was etablished by Kasparov and Skandalis and we prove the surjectivity.
Teleconnection between Australian winter temperature and Indian summer monsoon rainfall
Authors: Lee S.-Y. , Koh T. Y.
Published: January 2012

Abstract. The pattern of evaporative sources and the direction of the large-scale circulation over the Indian Ocean during the boreal summer raises the question of whether atmospheric conditions in Australia could influence conditions over the Indian subcontinent, despite the long passage of air over the Indian Ocean. The authors propose that such an influence is sometimes possible when there is unusually low temperature over inland Australia during the austral winter, through the mechanism where such a temperature extreme enhances evaporation rate over the eastern tropical Indian Ocean and hence enhances rainfall over two regions in western India after 13–19 days. Results from trajectory calculations indicate that such an influence is mechanistically feasible, with air of Australian origin contributing 0.5–1.5% of the climatological net precipitation for monsoon seasonal rainfall over western India. Statistics performed on reanalysis, satellite and in situ data are consistent with such a mechanism. Since extreme winter temperature in Australia is often associated with cold-air outbreaks, the described mechanism may be an example of how southern hemispheric mid-latitude weather can influence northern hemispheric monsoon rainfall. Further study is recommended through modelling and comparison with various known causes of atmospheric variability to confirm the existence of such a mechanism and determine the extent of its influence during specific low temperature episodes.
Morphology, composition and mixing state of individual carbonaceous aerosol in urban Shanghai
Authors: Fu H. , Zhang M. , Li W. , Chen J. , Wang L. , Quan X. , Wang W.
Published: January 2012

Abstract. A total of 834 individual aerosol particles were collected during October and November 2010 in urban Shanghai, China. Particles were sampled under different weather and air quality conditions. Morphologies, compositions and mixing states of carbonaceous aerosols were investigated by transmission electron microscopy (TEM) coupled with energy-dispersive X-ray (EDX). Structures of some particles were verified using selected-area electron diffraction (SAED). Among the aerosol particles observed, carbonaceous aerosols were mainly categorized into four types: polymeric organic compound (POC), soot, tar ball, and biogenic particle. Based on the detailed TEM-EDX analysis, most of the particles were coated with secondary organic aerosols (SOA), which commonly formed through condensation or heterogeneous reactions of precursor gases on pre-existing particles. Aged particles were associated with days with low wind velocities, showed complex structures, and were bigger in size. The internally mixed particles of sulphates, organics and soot were encountered frequently. Such internally mixed particles may be preferentially formed during a stagnated air mass during serious pollution events, such as on 13 November. Although relative number counts varied with different species, sulphates (38–71%) and soot (11–22%) constituted the most dominant species observed in the samples. However, soil-derived particles (68%) were relatively more frequently observed on the sample collected on 12 November during a dust storm.
Aerosol-cloud-precipitation effects over Germany as simulated by a convective-scale numerical weather prediction model
Authors: Seifert A. , Köhler C. , Beheng K. D.
Published: January 2012

Abstract. Possible aerosol-cloud-precipitation effects over Germany are investigated using the COSMO model in a convection-permitting configuration close to the operational COSMO-DE. Aerosol effects on clouds and precipitation are modeled by using an advanced two-moment microphysical parameterization taking into account aerosol assumptions for cloud condensation nuclei (CCN) as well as ice nuclei (IN). Simulations of three summer seasons have been performed with various aerosol assumptions, and are analysed regarding surface precipitation, cloud properties, and the indirect aerosol effect on near-surface temperature. We find that the CCN and IN assumptions have a strong effect on cloud properties, like condensate amounts of cloud water, snow and rain as well as on the glaciation of the clouds, but the effects on surface precipitation are – when averaged over space and time – small. This robustness can only be understood by the combined action of microphysical and dynamical processes. On one hand, this shows that clouds can be interpreted as a buffered system where significant changes to environmental parameters, like aerosols, have little effect on the resulting surface precipitation. On the other hand, this buffering is not active for the radiative effects of clouds, and the changes in cloud properties due to aerosol perturbations may have a significant effect on radiation and near-surface temperature.
Assessing large-scale weekly cycles in meteorological variables: a review
Authors: Sanchez-Lorenzo A. , Laux P. , Hendricks-Franssen H.-J. , Calbó J. , Vogl S. , Georgoulias A. K. , Quaas J.
Published: January 2012

Abstract. Several studies have claimed to have found significant weekly cycles of meteorological variables appearing over large domains, which can hardly be related to urban effects exclusively. Nevertheless, there is still an ongoing scientific debate whether these large-scale weekly cycles exist or not, and some other studies fail to reproduce them with statistical significance. In addition to the lack of the positive proof for the existence of these cycles, their possible physical explanations have been controversially discussed during the last years. In this work we review the main results about this topic published during the recent two decades, including a summary of the existence or non-existence of significant weekly weather cycles across different regions of the world, mainly over the US, Europe and Asia. In addition, some shortcomings of common statistical methods for analyzing weekly cycles are listed. Finally, a brief summary of supposed causes of the weekly cycles, focusing on the aerosol-cloud-radiation interactions and their impact on meteorological variables as a result of the weekly cycles of anthropogenic activities, and possible directions for future research, is presented.
Information operator approach applied to the retrieval of the vertical distribution of atmospheric constituents from ground-based high-resolution FTIR measurements
Authors: Senten C. , De Mazière M. , Vanhaelewyn G. , Vigouroux C.
Published: January 2012

Abstract. The analysis of high spectral resolution Fourier Transform infrared (FTIR) solar absorption spectra is an important issue in remote sensing. If this is done carefully, one can obtain information, not only about the total column abundances, but also about the vertical distribution of various constituents in the atmosphere. This work introduces the application of the information operator approach for extracting vertical profile information from ground-based FTIR measurements. The algorithm is implemented and tested within the well-known retrieval code SFIT2, adapting the optimal estimation method such as to take into account only the significant contributions to the solution. In particular, we demonstrate the feasibility of the method in an application to ground-based FTIR spectra taken in the framework of the Network for the Detection of Atmospheric Composition Change (NDACC) at Ile de La Réunion (21° S, 55° E). A thorough comparison is made between the original optimal estimation method, Tikhonov regularization and this alternative retrieval algorithm, regarding information content, retrieval robustness and corresponding full error budget evaluation for the target species ozone (O3), nitrous oxide (N2O), methane (CH4), and carbon monoxide (CO). It is shown that the information operator approach performs well and in most cases yields both a better accuracy and stability than the optimal estimation method. Additionally, the information operator approach has the advantage of being less sensitive to the choice of a priori information than the optimal estimation method and Tikhonov regularization. On the other hand, in general the Tikhonov regularization results seem to be slightly better than the optimal estimation method and information operator approach results when it comes to error budgets and column stability.
On the retreat of near-Earth neutral line during substorm expansion phase: a THEMIS case study during the 9 January 2008 substorm
Authors: Cao X. , Pu Z. Y. , Du A. M. , Mishin V. M. , Wang X. G. , Xiao C. J. , Zhang T. L. , Angelopoulos V. , McFadden J. P. , Glassmeier K. H.
Published: January 2012

Abstract. The location of magnetic reconnection in the mid-tail during a substorm was studied in many researches. Here we present multi-point THEMIS observations of a reconnection event in the near-Earth magnetotail during substorm. In this event, THEMIS probes stayed in the near-Earth and mid-tail region aligning along the magnetotail. This allows reconnection evolution to be probed simultaneously from about −10 RE to −23 RE down tail. The Hall current related electron streams were observed at the same time by two probes far away from the reconnection site. Before near-Earth reconnection involved the tail lobe magnetic field, the reconnection site was restricted in earthward −23 RE. When reconnection involved into the tail lobe region, the reconnection site started to retreat gradually.
Non-storm irregular variation of the Dst index
Authors: Nakano S. , Higuchi T.
Published: January 2012

Abstract. The Dst index has a long-term variation that is not associated with magnetic storms. We estimated the long-term non-storm component of the Dst variation by removing the short-term variation related to magnetic storms. The results indicate that the variation of the non-storm component includes not only a seasonal variation but also an irregular variation. The irregular long-term variation is likely to be due to an anti-correlation with the long-term variation of solar-wind activity. In particular, a clear anti-correlation is observed between the non-storm component of Dst and the long-term variation of the solar-wind dynamic pressure. This means that in the long term, the Dst index tends to increase when the solar-wind dynamic pressure decreases. We interpret this anti-correlation as an indication that the long-term non-storm variation of Dst is influenced by the tail current variation. The long-term variation of the solar-wind dynamic pressure controls the plasma sheet thermal pressure, and the change of the plasma sheet thermal pressure would cause the non-storm tail current variation, resulting in the non-storm variation of Dst.
Intercontinental trans-boundary contributions to ozone-induced crop yield losses in the Northern Hemisphere
Authors: Hollaway M. J. , Arnold S. R. , Challinor A. J. , Emberson L. D.
Published: January 2012

Abstract. Using a global atmospheric chemistry model, we have quantified for the first time, intercontinental transboundary contributions to crop ozone exposure and subsequent yield reductions in the Northern Hemisphere. We apply four metrics (AOT40, M7, M12, W126) to assess the impacts of 100% reductions in anthropogenic NOx emissions from North (N) America, South East (SE) Asia and Europe on global and regional exposure of 6 major agricultural crop types to surface ozone, and resultant crop production losses during the year 2000 growing season. Using these metrics, model calculations show that for wheat, rice, cotton and potato, 100 % reductions in SE Asian anthropogenic NOx emissions tend to produce the greatest global reduction in crop production losses (42.3–95.2%), and a 100 % reduction to N~American anthropogenic NOx emissions results in the greatest global impact on crop production losses for maize and soybean (59.2–85.9%). A 100% reduction in N~American anthropogenic NOx emissions produces the largest transboundary impact, resulting in European production loss reductions of between 14.2% and 63.2%. European NOx emissions tend to produce a smaller transboundary impact, due to inefficiency of transport from the European domain. The threshold nature of the AOT40 ozone-exposure metric results in strong dependence of non-local emissions impacts on the local ozone concentration distribution. Our calculations of absolute crop production change under emission reduction scenarios differ between the metrics used, however we find the relative importance of each region's transboundary impact remains robust between metrics. Our results demonstrate that local air quality and emission control strategies have the potential to partly alleviate ozone-induced crop yield loss in continents downstream, in addition to effectively mitigating local ozone-induced production losses.
Pteropods from the Caribbean Sea: variations in calcification as an indicator of past ocean carbonate saturation
Authors: Wall-Palmer D. , Hart M. B. , Smart C. W. , Sparks R. S. J. , Le Friant A. , Boudon G. , Deplus C. , Komorowski J. C.
Published: January 2012

Abstract. The aragonite shell-bearing thecosome pteropods are an important component of the oceanic plankton. However, with increasing pCO2 and the associated reduction in oceanic pH (ocean acidification), thecosome pteropods are thought to be particularly vulnerable to shell dissolution. The distribution and preservation of pteropods over the last 250 000 years have been investigated in marine sediment cores from the Caribbean Sea close to the island of Montserrat. Using the Limacina Dissolution Index (LDX), fluctuations in pteropod calcification through the most recent glacial/interglacial cycles are documented. By comparison to the oxygen isotope record (global ice volume), we show that pteropod calcification is closely linked to global changes in pCO2 and pH and is, therefore, a global signal. These data are in agreement with the findings of experiments upon living pteropods, which show that variations in pH can greatly affect aragonitic shells. The results of this study provide information which may be useful in the prediction of future changes to the pteropod assemblage caused by ocean acidification.
Pyrite Oxidation under initially neutral pH conditions and in the presence of Acidithiobacillus ferrooxidans and micromolar hydrogen peroxide
Authors: Ma Y. , Lin C.
Published: January 2012

Abstract. Hydrogen peroxide (H2O2) at a micromolar level played a role in the microbial surface oxidation of pyrite crystals under initially neutral pH. When the mineral-bacteria system was cyclically exposed to 50 μM H2O2, the colonization of \\textit{Acidithiobacillus ferrooxidans} onto the mineral surface was markedly enhanced, as compared to the control (no added H2O2). This can be attributed to the effects of H2O2 on increasing the roughness of the mineral surfaces, as well as the acidity and Fe2+ concentration at the mineral-solution interfaces. All of these effects tended to create more favourable nano- to micro-scale environments in the mineral surfaces for the cell adsorption. However, higher H2O2 levels inhibited the attachment of cells onto the mineral surfaces, possibly due to the oxidative stress in the bacteria when they approached the mineral surfaces where high levels of free radicals are present as a result of Fenton-like reactions. The more aggressive nature of H2O2 as an oxidant caused marked surface flaking of the mineral surface. The XPS results suggest that H2O2 accelerated the oxidation of pyrite-S and consequently facilitated the overall corrosion cycle of pyrite surfaces. This was accompanied by pH drop in the solution in contact with the pyrite cubes.
A new perspective on the spatio-temporal variability of soil moisture: temporal dynamics versus time invariant contributions
Authors: Mittelbach H. , Seneviratne S. I.
Published: January 2012

Abstract. Knowledge about the spatio-temporal variability of soil moisture is essential to understand and predict processes in climate science and hydrology. A significant body of literature exists on the characterization of the spatial variability and the ranks stability (also called temporal stability) of absolute soil moisture. Yet previous studies were generally based on short-term measurement campaigns and did not distinguish the respective contributions of time varying and time invariant components to these quantities. In this study, we investigate this issue using measurements from 14 grassland sites of the SwissSMEX soil moisture network (spatial extent of approx. 150 × 210 km) over the time period May 2010 to July 2011. We thereby decompose the spatial variance of absolute soil moisture over time in contributions from the spatial variance of the mean soil moisture at all sites (which is time invariant), and components that vary over time and are related to soil moisture dynamics. These include the spatial variance of the temporal soil moisture anomalies at all sites and the covariance between the sites' anomalies to the spatial mean at a given time step and those for the temporal mean values. The analysis demonstrates that the time invariant term contributes 50–160% (on average 94%) of the spatial soil moisture variance at any point in time, while the covariance term generally contributes negatively to the spatial variance. On the other hand the spatial variance of the temporal anomalies, which is overall most relevant for climate and hydrological applications because it is directly related to soil moisture dynamics, is relatively limited and constitutes at most 2–30% (on average 9%) of the total variance. Nonetheless, this term is not negligible compared to the temporal anomalies of the spatial mean. These results suggest that a large fraction of the spatial variability of soil moisture assessed from short-term campaign is time invariant. Moreover, we find that the rank (or "temporal") stability concept when applied to absolute soil moisture, mostly characterizes the time-invariant patterns. Indeed, sites that best represent the mean soil moisture dynamics of the network are not the same as those that best reflect mean soil moisture at any point in time. Overall this study shows that conclusions derived from the analysis of the spatio-temporal variability of absolute soil moisture do generally not apply to temporal soil moisture anomalies, and hence to soil moisture dynamics.
Atlantic transport variability at 25° N in six hydrographic sections
Authors: Atkinson C. P. , Bryden H. L. , Cunningham S. A. , King B. A.
Published: January 2012

Abstract. In January and February 2010, a sixth transatlantic hydrographic section was completed across 25° N, extending the hydrographic record at this latitude to over half a century. In combination with continuous transport measurements made since 2004 at 26° N by the Rapid-WATCH project, we reassess transport variability in the 25° N hydrographic record. Past studies of transport variability at this latitude have assumed transport estimates from each hydrographic section to represent annual average conditions. In this study the uncertainty in this assumption is assessed through use of Rapid-WATCH observations to quantify sub-seasonal and seasonal transport variability. Whilst in the upper-ocean no significant interannual or decadal transport variability are identified in the hydrographic record, in the deep ocean transport variability in both depth and potential temperature classes suggests some interannual or decadal variability may have occurred. This is particularly striking in the lower North Atlantic Deep Water where southward transports prior to the 1990s were higher than recent transports by several Sverdrups. Whilst a cooling and freshening of Denmark Straits Overflow Water has occurred which is coincident with these transport changes, these water mass changes appear to be density compensated. Transport changes are the result of changing velocity shear in the vicinity of the Deep Western Boundary Current.
Archivos y ciudadania: el acceso a la información pública
Authors: Ancona Lopez André Porto
Published: January 2012

Se trata de un artículo donde se propone discutir el papel activo de los archivos para el acceso a la información pública, considerándolos depositarios naturales de las pruebas de los actos administrativos y, por lo tanto, con un papel central en la agenda de la transparencia y de la ciudadanía El texto se plantea trabajar con los conceptos clave de los archivos y de los documentos de archivo con el propósito de discutir algunas de las relaciones existentes entre tales instituciones y la sociedad. El derecho al acceso a la información sobrepasa una comprensión más amplia del papel activo de los archivos, los cuales no se resumen a los meramente administrativos de Estado, sino también a los privados de interés público y social, tal como se ejemplifica con algunos casos brasileños. Las dimensiones activa y de prueba de los documentos de archivo están directamente relacionadas a sus cuatro características esenciales (organicidad, naturalidad, imparcialidad y autenticidad), tal como se trató de demostrar en otros ejemplos.
La socialización del patrimonio bibliográfico y documental de la humanidad desde la perspectiva de los derechos culturales
Authors: Palma Peña Juan Miguel
Published: January 2012

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.
Algunas reflexiones acerca de los “maestros de hacer breviarios y escrituras de molde” Juan de Bobadilla y Álvaro de Castro (1483)
Authors: Rial Costas Benito
Published: January 2012

En 1483 el Cabildo compostelano acuerda con los “maestros de hacer breviarios y escrituras de molde” Juan de Bobadilla y Álvaro de Castro la impresión de ciento veinte breviarios para la diócesis compostelana. Pocos años después del descubrimiento de este documento, a finales del siglo XIX, la historiografía creó unas biografías de Juan de Bobadilla y Álvaro de Castro que hoy son comúnmente aceptadas. Este artículo repasa la historia de la creación de dichas biografías, exponiendo la poca solidez de los argumentos utilizados; y propone limitarse a los datos de Juan de Bobadilla y Álvaro de Castro que se mencionan en el acuerdo de impresión de 1483, cuestionando, sin embargo, la interpretación que la historiografía ha hecho de ese documento.
Evaluación de la trayectoria investigadora a través de la distribución de citas: una aplicación a los Nobel de economía
Authors: Dorta-González Mª Isabel , Dorta-González Pablo
Published: January 2012

La distribución de citas de un investigador refleja el impacto de su producción y determina el éxito de su carrera profesional. Sin embargo, resulta difícil su aplicación por el carácter bidimensional. En los últimos años, han aparecido algunos indicadores que tratan de sintetizar, en un valor numérico, las características principales de esta distribución. A diferencia de otros indicadores, el índice h elimina los sesgos provocados por las colas de la distribución. Sin embargo, este indicador presenta limitaciones a la hora de discriminar entre investigadores con diferentes hábitos de publicación, penalizando a aquellos más selectivos, que no destacan por el número de publicaciones pero sí por el alto número de citas recibidas, frente a los grandes productores. En este trabajo se aplican dos nuevos indicadores en la evaluación de los ganadores del Nobel de Economía.
La biblioteca escolar vista por sus usuarios: el caso de la biblioteca del CEIP Isabel la Católica (Colmenar Viejo, Madrid)
Authors: M. Ferrer Linda , Moscoso Purificación
Published: January 2012

El objeto de este estudio es evaluar la biblioteca del Centro de Educación Infantil y Primaria Isabel La Católica a través de la visión que aportan sus usuarios, desde alumnos de cinco a doce años hasta los profesores del centro. Para conocer su opinión y percepción se ha llevado a cabo una evaluación subjetiva basada en los modelos ServQUAL y en su derivado para bibliotecas LibQUAL+, que se han adaptado a las peculiaridades y características de los distintos tipos de usuarios, así como los objetivos de las bibliotecas escolares de la Comunidad de Madrid.
Estudio de la producción científica de las publicaciones en México referentes a la catalogación de documentos: 1990-2009
Authors: Clausó García Adelina , Carpallo Bautista Antonio
Published: January 2012

En este artículo se hace un balance de la producción científica mexicana de monografías, artículos de revistas, congresos y sus comunicaciones, así como Tesis, Tesinas e Informes académicos referentes a la catalogación de documentos entre los años 1990-2009, a partir de los registros encontrados en la base de datos INFOBILA, en la base de datos CLASE, en el OPAC de la Biblioteca Nacional de México, en el OPAC de la biblioteca del CUIB y en la revista Investigación Bibliotecológica. Se estudia la fecha de publicación, la autoría, el género, los lugares y entidades editoras, entre otros aspectos de interés que posibilitan un acercamiento a esta área del conocimiento.
El archivo audiovisual de RTVE. Programas emitidos entre 1956 y 1975 sobre la Guerra Civil
Authors: Paz María Antonia , Montero Julio
Published: January 2012

Se da cuenta precisa del material conservado en el archivo de RTVE sobre programas acerca de la Guerra Civil Española que se emitieron entre 1956 y 1975, y de la forma de acceder al mismo. Igualmente se describe su interés y el contexto histórico fundamental en que se produjeron y se emitieron. También se indica la importancia de las fuentes hemerográficas para orientar las búsquedas y completar las carencias del material de archivo.
Evaluación de la biblioteca pública de Valencia mediante la técnica encadenada de “grupos de discusión” y “encuesta”
Authors: Cortés Villalba Carmina , Gil-Leyva Isidoro
Published: January 2012

Se evalúan los servicios de la Biblioteca Pública de Valencia (BPV) a través de la opinión de los usuarios para lo cual se conformaron dos grupos de discusión en el que participaron diez personas en total. Los resultados de los grupos de discusión sirvieron para confeccionar una encuesta piloto y posteriormente, una encuesta definitiva que fue autocumplimentada por cuatrocientos usuarios de la BPV. Se concluye que la BPV cumple, en general, con las expectativas de los ciudadanos, si bien hay aspectos mejorables como horarios, informar mejor de las actividades y servicios y la señalética, entre otros aspectos. Asimismo, se confirma el sistema encadenado de grupos de discusión–encuesta como un sistema reforzado que optimiza el diseño del cuestionario.
Femtosecond Laser Photodisruptive Effects on the Posterior Human Corneal Stroma Investigated with Atomic Force Microscopy
Authors: Serrao Sebastiano , Lombardo Marco , De Santo Maria P. , Lombardo Giuseppe , Lomoriello Domenico Schiano , Ducoli Pietro , Stirpe Mario
Published: January 2012

Purpose

To analyze the effects of femtosecond laser pulses on the posterior human corneal stroma with atomic force microscopy (AFM) and environmental scanning electron microscopy (ESEM).

Methods

A femtosecond laser (IntraLase iFS, Abbott, USA) was programmed to create a full posterior lamellar dissection in 9 human corneal tissues, using 3 different pulse energies (1.00 µJ, 0.75 µJ, and 0.50 µJ). Three corneal tissues were prepared in a similar fashion using a mechanical microkeratome (Moria Evolution 3, Moria, France). Six corneal tissues received an 8.00-mm diameter full cylindrical resection using either the femtosecond laser or the Barron trephine (Katena Products Inc., USA). The posterior corneal lenticules were first examined at AFM (Autoprobe CP, Veeco, USA). Both the posterior lenticules and the trephined corneal samples were scanned by ESEM (FEI Quanta 400, USA).

Results

Granules and crater-like features were observed on the stromal interface of all the laser dissected tissues, likely due to a secondary thermal effect of femtosecond laser dissection. Collagen fibers were seen only on samples treated with the 0.50 µJ pulse energy. Images of an even stromal surface were observed on the posterior stroma of mechanically dissected corneal samples.

Conclusions

Mechanical and thermal effects, induced by femtosecond laser pulses on the human corneal stroma, were seen with AFM. Surface regularity of the photodisrupted stroma was inversely and non-linearly related to the pulse energy. The femtosecond laser provided high surface quality for lamellar resection of the posterior stroma comparable to those provided by mechanical devices.
Exponential Stability for Discrete-Time Stochastic BAM Neural Networks with Discrete and Distributed Delays
Authors: Raja R. , Sakthivel R. , Marshal Anthoni S.
Published: January 2012

This paper deals with the stability analysis problem for a class of discrete-time stochastic
BAM neural networks with discrete and distributed time-varying delays. By constructing a suitable
Lyapunov-Krasovskii functional and employing M-matrix theory, we find some sufficient
conditions ensuring the global exponential stability of the equilibrium point for stochastic BAM
neural networks with time-varying delays. The conditions obtained here are expressed in terms
of LMIs whose feasibility can be easily checked by MATLAB LMI Control toolbox. A numerical
example is presented to show the effectiveness of the derived LMI-based stability conditions.
Association between Hypoadiponectinemia and Low Serum Concentrations of Calcium and Vitamin D in Women with Polycystic Ovary Syndrome
Authors: Mazloomi Sahar , Sharifi Faranak , Hajihosseini Reza , Kalantari Sadroddin , Mazloomzadeh Saideh
Published: January 2012

Objective. To investigate the possible association of calcium and vitamin D deficiency with hypoadiponectinemia in women with PCOS. Subjects and Methods. In this case-control study, 103 PCOS cases and 103 controls included. The concentrations of calcium, 25-OH-vitamin D (25OHD), adiponectin, insulin, glucose, total cholesterol, HDL-cholesterol, triglyceride (TG), and androgens were measured in fasting blood samples. Results. Adiponectin (8.4±2.7 ng/mL versus 13.6±5 ng/mL in control group, P:0.00), calcium (2±0.1 mmol/L versus 2.55±0.17 mmol/L in controls, P:0.00), and 25-OH-Vit D (30±2.99 nmol/L versus 43.7±5.2 nmol/L in control group, P:0.00) levels were decreased in women with PCOS. Subjects with PCOS had higher concentrations of TG (1.4±0.77 mmol/L versus 1.18±0.75 mmol/L in control group, P:  0.019) and dehydroepiandrosterone sulfate (DHEA-S) (10.7±11 mmol/L versus 9.7±10.4, P:0.02 in control group). There were significant correlations between adiponectin concentrations with calcium (r:0.78, P:0.00) and 25OHD levels (r:0.82, P:0.00). The association of hypoadiponectinemia and PCOS was not significant considering 25OHD as a confounding factor. Conclusion. The present findings indicate that the association of hypoadiponectinemia with PCOS is dependent on vitamin D. A possible beneficiary effect of vitamin D on the metabolic parameters in PCOS may be suggested.
Editorial
Authors: López Lita Rafael , Marzal Felici Javier
Published: January 2012

Editorial del número 2.
Presencia y contenidos de los blogs de autor en los ciberdiarios del grupo Vocento
Authors: Meso Ayerdi Koldobika
Published: January 2012

A lo largo de 2005, algunos de los ciberdiarios del grupo Vocento fueron los primeros medios en ofrecer blogs en sus sitios de Internet elaborados por periodistas del propio cibermedio o personal cualificado que los emplean para mantener un contacto con su audiencia. Seis años después, el número de títulos se ha multiplicado exponencialmente y han conseguido una mayor visibilidad integrándose en las portadas de estos ciberdiarios. En la presente comunicación analizaremos los «blogs de autor o firmados» de los ciberdiarios del grupo Vocento y cómo han aplicado medidas hasta lograr contar con una sección propia. Sus temáticas son muy variadas, así como su autoría, las actualizaciones de sus contenidos y las posibilidades que ofertan de recibir los comentarios de aquellas personas que los leen, y que expresan su opinión de una forma interactiva, enriqueciendo las ideas manifestadas en los mismos y permitiendo profundizar en ellas. Añaden fotografías, enlaces a otros blogs, ponen a disposición de los usuarios todo el archivo. Y detrás de ello, la intención de crear comunidad.
El escenario de conciliación para la igualdad en el entorno publicitario. Una comparación entre el sector docente y el profesional
Authors: Martín Llaguno Marta , Navarro Beltrá Marián , Rodríguez Jaume María José
Published: January 2012

En las últimas décadas, la conciliación se ha erigido como un tema de preocupación social. Así, en España surgen diversas normativas que tratan de solventar este problema. En concreto, en el año 2007 se promulga la Ley para la Igualdad Efectiva de Mujeres y Hombres (LOIEMH). En ella se contemplan medidas y acciones dirigidas a garantizar la no discriminación por razón de sexo, directa o indirecta, en todos los ámbitos, especialmente la derivada de la maternidad y las obligaciones familiares. Con el objetivo de conocer el grado de aplicabilidad de este precepto y de comparar las condiciones para la conciliación entre los docentes y profesionales del sector publicitario, se realiza un análisis de la información referente a la creación de Unidades de Igualdad y Planes de Igualdad en las universidades españolas que ofrecen estudios de publicidad y encuestas a profesores y empleados del sector publicitario para medir sus niveles de conflicto y su percepción sobre los efectos de los cambios normativos. Los resultados ponen de manifiesto que los entornos universitarios públicos han implantado en mayor medida los preceptos legales vinculados con la conciliación. A su vez, existen diferencias en la consideración del conflicto familiar/laboral entre los docentes y los profesionales: los profesores consideran que la esfera familiar interfiere en la laboral mientras que los publicitarios perciben que el desbordamiento de la esfera laboral hacia la familiar es superior. Ambos tipos de trabajadores perciben entornos laborales poco sensibles a la conciliación y no consideran que la ley haya tenido importantes repercusiones.
Reflujos de lo visible. La expansión post-fotográfica del documental
Authors: Catalá Josep María
Published: January 2012

Ante la aparición de nuevas formas de expresión visual, como el «Comic book documental» o el «Webdocumental», que reclaman la pertenencia al ámbito del documental a pesar de no ser medios fotográficos o no tener un nexo claro con la fotografía, se impone una reconsideración de las relaciones existentes entre el fenómeno fotográfico y el modo documental. Para ello, se analiza la función documentalista en la denominada era de la post-verdad, a partir de los conceptos de pre-fotografía y post-fotografía. Al mismo tiempo, se propone una nueva ontología fotográfica basada en sus relaciones transcendentales con la visión.
Self Encapsulated Poly(3‐hexylthiophene)‐poly(fluorinated alkyl methacrylate) Rod‐Coil Block Copolymers with High Field Effect Mobilities on Bare SiO2
Authors: Liu Junying , Haynes Dahlia , Balliet Courtney , Zhang Rui , Kowalewski Tomasz , McCullough Richard D.
Published: January 2012

Conjugated rod‐coil block copolymers provide an interesting route towards enhancing the properties of the conjugated block due to self‐assembly and the interplay of rod‐rod and rod‐coil interactions. Here, we demonstrate the ability of an attached semi‐fluorinated block to significantly improve upon the charge carrier properties of regioregular poly(3‐hexyl thiophene) (rr‐P3HT) materials on bare SiO2. The thin film hole mobilities on bare SiO2 dielectric surfaces of poly (3‐hexyl thiophene)‐block‐polyfluoromethacrylates (P3HT‐b‐PFMAs) can approach up to 0.12 cm2 V−1 s−1 with only 33 wt% of the P3HT block incorporated in the copolymer, as compared to rr‐P3HT alone which typically has mobilities averaging 0.03 cm2 V−1 s−1. To our knowledge, this is the highest mobility reported in literature for block copolymers containing a P3HT. More importantly, these high hole mobilities are achieved without multistep OTS treatments, argon protection, or post‐annealing conditions. Grazing incidence wide‐angle x‐ray scattering (GIWAX) data revealed that in the P3HT‐b‐PFMA copolymers, the P3HT rod block self‐assembles into highly ordered lamellar structures, similar to that of the rr‐P3HT homopolymer. Grazing incidence small‐angle x‐ray scattering (GISAXS) data revealed that lamellar structures are only observed in perpendicular direction with short PFMA blocks, while lamellae in both perpendicular and parallel directions are observed in polymers with longer PFMA blocks. AFM, GIWAXS, and contact angle measurements also indicate that PFMA block assembles at the polymer thin film surface and forms an encapsulation layer. The high charge carrier mobilities and the hydrophobic surface of the block copolymer films clearly demonstrates the influence of the coil block segment on device performance by balancing the crystallization and microphase separation in the bulk morphological structure.