La necesidad de considerar la accesibilidad como criterio de adquisición de los recursos electrónicos

Accessibility must be another criterion in the purchasing of electronic resources in order for all users to exert their right of access to information. So, libraries and librarians must demand accessibility to the electronic resources providers, because only the own-made resources being accessible are not enough. Through the valuation of three well-known electronic resources (E-libro, Web of Knowledge and Cab Direct), the accessibility problems of all of them and the urgency of improving this matter is demonstrated

Suppression of the 2010 Alexandrium fundyense bloom by changes in physical, biological, and chemical properties of the Gulf of Maine

Author Posting. © American Society of Limnology and Oceanography, 2011. This article is posted here by permission of American Society of Limnology and Oceanography for personal use, not for redistribution. The definitive version was published in Limnology and Oceanography 56 (2011): 2411-2426, doi:10.4319/lo.2011.56.6.2411.For the period 2005–2009, the abundance of resting cysts in bottom sediments from the preceding autumn was a first-order predictor of the overall severity of spring–summer blooms of Alexandrium fundyense in the western Gulf of Maine and southern New England. Cyst abundance off mid-coast Maine was significantly higher in autumn 2009 than it was preceding a major regional bloom in 2005. A seasonal ensemble forecast was computed using a range of forcing conditions for the period 2004–2009, suggesting that a large bloom was likely in the western Gulf of Maine in 2010. This did not materialize, perhaps because environmental conditions in spring–summer 2010 were not favorable for growth of A. fundyense. Water mass anomalies indicate a regional-scale change in circulation with direct influence on A. fundyense's niche. Specifically, near-surface waters were warmer, fresher, more stratified, and had lower nutrients than during the period of observations used to construct the ensemble forecast. Moreover, a weaker-than-normal coastal current lessened A. fundyense transport into the western Gulf of Maine and Massachusetts Bay. Satellite ocean color observations indicate the 2010 spring phytoplankton bloom was more intense than usual. Early season nutrient depletion may have caused a temporal mismatch with A. fundyense's endogenous clock that regulates the timing of cyst germination. These findings highlight the difficulties of ecological forecasting in a changing oceanographic environment, and underscore the need for a sustained observational network to drive such forecasts.We gratefully acknowledge support of the National Oceanic Atmospheric Administration (grant NA06NOS4780245 for the Gulf of Maine Toxicity (GOMTOX) program) and the Woods Hole Center for Oceans and Human Health through National Science Foundation grants OCE-0430724 and OCE-0911031 and National Institute of Environmental Health Sciences grant 1P50- ES01274201

Finnish Elementary School Teachers' Attitudes Toward Gifted Education

This study examined Finnish elementary school teachers' (N = 212) attitudes toward the gifted and their education. On a general level, teachers' attitudes toward gifted education were slightly positive. Teachers saw that gifted students have social value and that they need special services. The results of teachers' attitudes toward specific gifted education options were in line with earlier Finnish research, because teachers supported differentiated teaching but were more negative toward acceleration or separating the gifted into their own groups. However, despite the strong support for differentiated teaching for the gifted, teachers' positions toward practice were more skeptical.Peer reviewe

What Can we Learn about Improving Gifted Identification by Studying how Accurate the Process is in Arkansas?

How might we improve gifted and talented (G/T) identification by learning about the process in Arkansas (AR)? In this study, we examined the accuracy of the gifted identification process in AR by comparing the degree to which students who were academically talented in the top 5% on the 3 rd grade state assessment in reading and mathematics in AR were identified for G/T. Across five years of independent cohorts, we replicate the finding that roughly 30% of the students in the top 5% in both reading and mathematics on the 3 rd grade state assessment are not identified as G/T. Multivariate models indicate that high achieving students participating in the Federal Free/Reduced Lunch program were 11 percentage points less likely to be identified as G/T. Our study has policy implications for AR’s G/T screening strategies, and more broadly for G/T identification of low-income and historically marginalized groups. Using student achievement on the 3rd grade state assessment in reading and mathematics as a ‘universal screening’ tool could help these students receive the academic services they need to develop their talent to the fullest

Glyoxal and methylglyoxal in Atlantic seawater and marine aerosol particles: method development and first application during the Polarstern cruise ANT XXVII/4

An analytical method for the determination of the alpha dicarbonyls glyoxal (GLY) and methylglyoxal (MGLY) from seawater and marine aerosol particles is presented. The method is based on derivatization with o-(2,3,4,5,6-Pentafluorobenzyl)-hydroxylamine (PFBHA) reagent, solvent extraction and GC-MS (SIM) analysis. The method showed good precision (RSD < 10%), sensitivity (detection limits in the low ng L−1 range), and accuracy (good agreement between external calibration and standard addition). The method was applied to determine GLY and MGLY in oceanic water sampled during the Polarstern cruise ANT XXVII/4 from Capetown to Bremerhaven in spring 2011. GLY and MGLY were determined in the sea surface microlayer (SML) of the ocean and corresponding bulk water (BW) with average concentrations of 228 ng L−1 (GLY) and 196 ng L−1 (MGLY). The results show a significant enrichment (factor of 4) of GLY and MGLY in the SML. Furthermore, marine aerosol particles (PM1) were sampled during the cruise and analyzed for GLY (average concentration 0.19 ng m−3) and MGLY (average concentration 0.15 ng m−3). On aerosol particles, both carbonyls show a very good correlation with oxalate, supporting the idea of a secondary formation of oxalic acid via GLY and MGLY. Concentrations of GLY and MGLY in seawater and on aerosol particles were correlated to environmental parameters such as global radiation, temperature, distance to the coastline and biological activity. There are slight hints for a photochemical production of GLY and MGLY in the SML (significant enrichment in the SML, higher enrichment at higher temperature). However, a clear connection of GLY and MGLY to global radiation as well as to biological activity cannot be concluded from the data. A slight correlation between GLY and MGLY in the SML and in aerosol particles could be a hint for interactions, in particular of GLY, between seawater and the atmosphere

Seasonal Variability in Air-Sea Fluxes of CO\u3csub\u3e2\u3c/sub\u3e in a River-Influenced Coastal Margin

Recent studies in the northern Gulf of Mexico and elsewhere have demonstrated that enhanced biological production in large river plumes may contribute to a net surface influx of atmospheric CO2. However, large rivers also deliver significant amounts of terrestrial carbon into continental margin waters; hence, the potential for large and variable signals in carbon flux exist in these regions. Here, we used a combination of satellite and ship-based observations to examine variability in surface pCO(2) and air-sea flux of carbon dioxide in relation to variations in river discharge and seasonal environmental conditions. Underway surface pCO(2) showed large seasonal differences based on observations acquired during cruises in August 2004, October 2005, and April 2006. Strong cross-shelf gradients in pCO(2) were observed during August 2004 and April 2006, influenced by river outflow. Uniformly high values observed during October 2005 likely reflected the disturbed nature of the system after two major storm events (hurricanes Katrina and Rita). Satellite-derived assessments of pCO(2) were used in conjunction with estimates of wind fields to produce regional maps of surface water pCO(2) and air-sea fluxes. The region was a net sink for atmospheric CO2 in August 2004 (-0.96 to -1.2 mmol C m(-2) d(-1)) and net source during October 2005 and April 2006 (1.0 to 5.4 mmol C m(-2) d(-1)). Uncertainties in flux estimates, particularly for low salinity waters in April 2006, highlighted the need for more extensive in situ observations. Our results illustrate the utility of satellite approaches for providing regional assessments of coastal carbon budgets

Let\u27s cross platforms

Different platforms and browsers render text and images differently. Therefore, web designers should know how to deal with these types of media. Many web designers use the Macintosh, and the majority of the users are on the PC. This thesis project examines the visual elements of web design consisting of fonts, colors, and graphics and how they change between the PC and Mac. The two major browsers used by people to surf the web are Internet Explorer and Netscape Navigator and they also cause problems with consistency. Resolution differences cause font problems. Knowing the default system resolution to specify with Cascading Style Sheets (CSS) can be a solution. Gamma and system palette differences between platforms cause color problems. Changing gamma settings is helpful to simulate other platforms for image correction. Using Web safe color, a standard for the web, is a solution for system palette differences. GIF and JPEG file formats are the most commonly used web graphic formats. If browsers support PNG format in the near future, designers can take advantage of it. Testing often in target platforms and browsers and allowing enough time for any necessary change is the best solution. Test for as many variable as possible

The Missouri Miner, March 07, 1990

https://scholarsmine.mst.edu/missouri_miner/3543/thumbnail.jp

Genetic and morphometric evidence for parallel evolution of the Globigerinella calida morphotype

Molecular genetic investigations of the highly abundant extant planktonic foraminifera plexus Globigerinella siphonifera/Globigerinella calida have recently shown this group to be the genetically most diverse one within planktonic foraminifera, separating it into 12 distinct genetic types belonging to three main genetic lineages. Independently, several morphological or physiological variants have been described within the group, but the correlation between the high genetic diversity and the phenotypic variability remains unclear. In this study, we combine genetic data with morphometric analyses of shell shape and porosity of genotyped individuals of the different genetic lineages. Our morphometric measurements suggest a differentiation of three morphotypes within the plexus, two of which possess the elongated chambers described as a typical trait of G. calida. These two morphotypes with elongated chambers are associated with two distinct genetic lineages. The G. calida morphology therefore appears to have evolved twice in parallel. Unexpectedly, we show that the two morphotypes with elongated chambers can be separated from each other by characters seen in the lateral view of their shells. This implies that the taxonomy of the extant members of the genus Globigerinella should be revised. A comparison with the original descriptions and type specimens of members of the genus shows that two genetic types of one major lineage correspond to G. calida. The second group with elongated chambers is associated with a recently diverged genetic type and we propose to reinstate the name Globigerinella radians for this distinct form. The remaining nine of the 12 genetic types correspond to the G. siphonifera morphology, and in the absence of evidence for morphological differentiation, they form a paraphyletic morpho-taxon. Our results highlight the prevalence of parallelism in the evolution of shell morphology in planktonic foraminifera even at the lowest level of relatedness represented by genetic types

Imagética contemporânea e pós-imagem : a marca do software e o uso de ferramentas borderline no caso uturn

Esta investigação debruça-se sobre a imagética contemporânea. O processo mediador das imagens em meio computacional tem sido analisado à luz da convergência cultural dos media, algo que cada vez mais associamos a termos como multidisciplinaridade e hibridização. Abordo, nesta investigação, algumas características que inserem a componente computacional no seio da imagem: aglutinação e justaposição com outros media, inteligência artificial e parceria homem-máquina na produção e/ou fruição (Prossumers/Gatekeepers). Classifico como pós-imagens os objetos digitais que simulam a superfície original da fotografia, mas são constituídos por zeros e uns — a camada realizada pelo software, cujo papel como medium altera a sua materialidade. Enquadro os atos imagéticos, os aspectos de condução e geração destas pós-imagens, as alterações que têm percorrido, o nexo evolutivo, bem como algumas das suas características. O modelo metodológico seguiu caminhos levantados em processos de investigação definidos por Schön, Routio, Irwin e Marcos, Branco e Zagalo. Através dele, observamos a investigação, concepção, processo criativo e desenvolvimento de uma instalação (“uTurn”). A pesquisa incluiu a exploração de ferramentas “borderline” (Quartz Composer, QR Code, Videomapping, Social hacking, voto digital), formadas a partir de uma ideia de Irwin (2012), bem como a programação de software para solucionar problemas encontrados. A exploração artística desta ideia foi orientada para a experimentação de variados media, usando o software como condutor, de modo a dar abrigo à recolha interdisciplinar, à divulgação e debate do tema, ao alargar de parcerias com outros artistas, culminando na produção de uma instalação de Média-Arte interativa colaborativa “in situ” no congresso de artes digitais Artech 2015 (Óbidos, Portugal).This research focuses on contemporary imagery. The mediation process of images has been associated with cultural convergence, increasingly tied to concepts such as “multidisciplinarity” and “hybridization”. In this research, I address the existence of the computational component within the concept of images: agglutination and juxtaposition with other media, artificial intelligence and man-machine partnership in production and/or fruition (Prossumers/Gatekeepers). I classify as Post-images the digital objects that simulate the original surface of the image, but are really formed by zeros and ones — a layer established by software, whose role as medium changes the materiality of images. I start by framing the imagetic acts, aspects of generation and traffic of these post-images, the changes that they have gone through, the evolutionary nexus, as well as some of its characteristics. The methodological model followed paths raised in research processes defined by Marcos, Branco and Zagalo, Schön, Routio and Irwin. Through it, we observe the investigation, design, creative process and development of an instalation ("uTurn"). The research included the exploration of “borderline tools“ (Quartz Composer, QR Code, Videomapping, Social hacking, digital vote), following Irwin’s theoretical model (2012), as well as software programming to address the found questions. The artistic exploration of this idea was oriented to the experimentation of various media, using software as conductor, in order to house an interdisciplinary collection, to the diffusion and debate of the subject, extending partnerships to other artists, culminating in the production of a collaborative interactive Media-Art installation "in situ" at Artech 2015 Digital Arts Congress (Óbidos, Portugal)