bluuebunny/crossref_metadata_2025_split huggingface dataset:
Des pratiques citoyennes en régime industriel : les courts-circuits du compost
Authors: Dumain Aurélie , Rocher Laurence 
Published: November 2017

L’article porte sur le développement des pratiques de compostage collectif, analysé à partir d’une étude ethnographique menée dans l’agglomération lyonnaise. Il décrit comment des pratiques de détournement des matières fermentescibles des flux de déchets initiées par des habitants et des associations, tendent à être reconnues et institutionnalisées tout en faisant l’objet d’une régulation assez poussée. Cet article propose une analyse des régimes de circulation des déchets à partir d’une observation des opérations par lesquelles des acteurs s’organisent pour faire circuler d’une autre manière les déchets organiques, les détourner d’un régime de circulation qualifié d’« industriel » et les introduire dans un autre circuit, qu’il s’agit de faire advenir, défini comme « proche » et « militant ». Nous montrons comment la mise en circulation de ces matières consiste à « court-circuiter » le système sociotechnique établi de la gestion des déchets, tout en s’y ajustant, et combien à travers la dimension matérielle de ces déchets sont engagés des circuits multiples et imbriqués : d’ordre financier, éthique, écologique, social et politique.
Application of Gas Chromatography Coupled to Quadrupole-Orbitrap Mass Spectrometry for Pesticide Residue Analysis in Cereals and Feed Ingredients
Authors: Tienstra Marc , Mol Hans G J 
Published: November 2017

Abstract
A method for residue analysis of pesticides and polychlorinated biphenyls in cereals and feed ingredients based on QuEChERS extraction, programmed temperature vaporizer large-volume injection, and GC with electron ionization (EI) quadrupole Orbitrap full-scan high-resolution MS (60 000 full width at half-maximum at m/z 200) has been developed. In addition to full-scan acquisition, simultaneous full-scan and selected-ion monitoring acquisition was used to improve detectability in incidental cases in which analytes coeluted with intense signals from coextractants. The method was successfully validated down to 10 µg/kg for a single commodity (wheat) using matrix-matched calibration, and for multiple-feed matrixes using standard addition. Identification according to European Union requirements was achieved in &gt;90% of the analyte/matrix combinations, and suggestions for further increasing identification rates have been made. Performance characteristics were compared to an existing method for residue analysis based on GC with EI tandem MS (triple quadrupole).
Coupling Ion Chromatography to Q-Orbitrap for the Fast and Robust Analysis of Anionic Pesticides in Fruits and Vegetables
Authors: Rajski Łukasz , Díaz Galiano Francisco José , Cutillas Víctor , Fernández-Alba Amadeo R 
Published: November 2017

Abstract
Ion chromatography coupled to a quadrupole Orbitrap mass analyzer was used to develop a multiresidue method for the determination of highly polar pesticides and their metabolites (chlorate, perchlorate, fosetyl-aluminum, glyphosate, aminomethylphosphonic acid (AMPA), phosphonic acid, N-acetyl AMPA, and N-acetyl glyphosate) in fruits and vegetables. After extraction with methanol, samples were diluted 5× with water. No derivatization was applied. Pesticides were separated in an anion-exchange column. Water was used as the ion chromatography mobile phase. A gradient was created by increasing the concentration of KOH in the mobile phase. Ion chromatography provided good and stable retention and separation for all studied compounds. All investigated pesticides had an LOQ of 0.01 mg/kg and a linear range of 0.01–0.50 mg/kg. The ion ratio of the m/z ions produced was stable and adequate (deviation &lt;30%) in all cases. The obtained mass errors (always in full-scan MS and MS2 mode) were &lt;0.2 mDa. The high resolution (&gt;100 000) provided by the Orbitrap analyzer with the low m/z ions obtained (e.g., m/z 80) was effective in obtaining low background matrix signals. The influence of postcolumn infusion of organic solvent on sensitivity was investigated. Acetonitrile was found to be more effective than methanol, increasing the sensitivity 3× with respect to water. The method was validated for five vegetable-based matrixes. Both the sample processing and the analytical measurement were very fast. Hence, the methodology is ideal for high-throughput work.
Pesticide Residue Analysis in Fruit- and Vegetable-Based Baby Foods Using GC-Orbitrap MS
Authors: Lozano Ana , Uclés Samanta , Uclés Ana , Ferrer Carmen , Fernández-Alba Amadeo R 
Published: November 2017

Abstract
This paper presents an efficiency evaluation of GC coupled with quadrupole Orbitrap MS for identification and quantitation in the multiresidue pesticide analysis of baby foods in full-scan mode. The identification criteria were studied following SANTE guidelines (retention time, mass accuracy, and ion ratio), comfortably complying with the values established, even at 0.003 mg/kg. Method validation was carried out on 15 selected GC-amenable pesticides covered by Commission Directive No. 2006/125/EC in three different baby food matrixes. Recovery studies were performed at 0.003 and 0.006 mg/kg, with 96% of the cases falling within the 70–120% range and with RSDs &lt;15% for all the pesticides assayed. Linearity over 3 orders of magnitude was verified, with residuals &lt;16% and correlation coefficient values &gt;0.995. In general, matrix effect values were &gt;100%. The LOQ was 0.003 mg/kg for 97% of the cases. The validated method was applied to 20 real baby food samples from Spain and to the European Union Proficiency Test FV-BF01 sample, in which the z-scores obtained were &lt;1, thus demonstrating that this instrumentation has good quantitation capabilities.
Discalculia: Um Mapeamento de Artigos Brasileiros
Authors: Avila Lanúzia Almeida Brum , Lara Isabel Cristina Machado de 
Published: November 2017

<p>Este artigo apresenta o mapeamento teórico de artigos que abordam a temática Discalculia, transtornos de aprendizagem em Matemática (TAM) e dificuldades de aprendizagem em Matemática (DAM) publicados em periódicos acadêmicos brasileiros. Tem como objetivo verificar o estado da arte dessas produções, buscando por suas convergências e divergências em relação a alguns aspectos, entre eles o modo como são conceituados os termos Discalculia, TAM e DAM e as contribuições aos profissionais da área da Educação. Para selecionar as produções brasileiras dos últimos anos, utilizou-se o banco de periódicos disponibilizados pela Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) e a Scientific Eletronic Library Online (SCIELO). A análise evidencia que os artigos divergem quanto aos termos adotados na literatura para referir-se às dificuldades de aprendizagem (DA) e aos transtornos de aprendizagem (TA), fazendo uso não somente do termo Discalculia, como também DAM, TAM e distúrbios de aprendizagem, o que acaba por dificultar a comparação entre os dados pesquisados, pela falta de padronização quanto as denominações utilizadas. <strong></strong></p>
O Conhecimento Pedagógico e a Integração das Tecnologias de Informação no Ensino de Quadriláteros
Authors: De Almeida Janaina Xavier , Mathias Carmen Vieira 
Published: November 2017

<span>Com o estudo proposto, objetivou-se analisar e compreender as concepções matemáticas <span>dos professores e, a partir disso, proporcionar oportunidades de introduzir a utilização das <span>Tecnologias de Informação e Comunicação (TIC) como ferramentas auxiliares na prática <span>docente, no ensino de quadriláteros. Essa compreensão utilizou como subsídios teóricos <span>os Saberes Docentes, os conhecimentos do conteúdo específico e o conhecimento tecnoló<span>gico e pedagógico do conteúdo. A pesquisa foi desenvolvida em duas etapas. Na primeira,<span>foram realizadas entrevistas e aplicados questionários aos professores, atuantes nos anos <span>iniciais do Ensino Fundamental, na rede Pública de um município do Rio Grande do Sul. Na <span>segunda etapa, foi organizada uma Oficina de Formação Continuada, oferecida aos professores pesquisados. A partir da análise e discussão das etapas, constatou-se <span>que os sujeitos da pesquisa se mostraram conscientes da importância do ensino de quadrilá<span>teros e do uso de TIC nos anos iniciais do ensino fundamental. Entretanto, essa consciência <span>esbarra em dificuldades decorrentes da sua formação inicial e continuada.</span></span></span></span></span></span></span></span></span></span></span><br /></span>
O papel do exílio na configuração do nacionalismo de Gonçalves Dias
Authors: Lima Renata Ribeiro 
Published: November 2017

<p><strong> </strong></p><p><strong>Resumo: </strong>Este trabalho propõe uma breve passagem pela biografia e pela obra do poeta Gonçalves Dias, com ênfase nos textos em que trata do exílio, analisando-os à luz de estudos sobre o Exílio e dos Estudos Pós-coloniais. Investiga-se a maneira como os sucessivos exílios a que foi submetido o poeta afetaram a sua forma de perceber e de atribuir valores aos lugares. Verifica-se como, nas representações do nacional em Gonçalves Dias, construídas a partir do duplo olhar do exilado, materializam-se conflitos de identidade, cruzando-se olhares do colonizado e do colonizador num amálgama de que era testemunha viva a própria pessoa do poeta.</p><p><strong>Palavras-chave: </strong>Exílio. Identidade. Consciência exílica. Romantismo. Nacionalismo.</p>
The Impact of Postoperative Percent Change of Parathormone Level From Baseline Value on the Rate of Hypocalcemia After Total Thyroidectomy
Authors: Sormaz Ismail C. , Iscan Ahmet Y. , Ozgur Ilker , Karakus Seyma , Tunca Fatih , Senyurek Yasemin G. , Terzioglu Tarik 
Published: November 2017

Background
The purpose of this study was to investigate the impact of the percent change of postoperative parathormone (PoPTH) level from baseline value (ΔPTH) on the rate of hypocalcemia after total thyroidectomy.

Methods
Assays of serum PTH and calcium (Ca) were performed preoperatively and at 24 hours postoperatively in 222 consecutive patients who underwent total thyroidectomy. Postoperative hypocalcemia was defined as serum calcium level corrected for albumin concentration (cCa) &lt;8.5 mg/dL. Patients with postoperative hypocalcemia were classified as group 1 (n = 100) and those with normal Ca levels as group 2 (n = 122). The PoPTH levels and ΔPTH were compared between the 2 groups. Receiver operating characteristic analysis was performed to determine the cutoff values for PoPTH and ΔPTH.

Results
The mean PoPTH level was significantly lower in group 1 compared with group 2 (18.6 ± 15.3 versus 32.3 ± 15.6 pg/mL, respectively; P &lt; 0.0001). PoPTH values were within the normal range in 54% of the patients with hypocalcemia and 35% of those with symptomatic hypocalcemia. PoPTH &lt;28 pg/mL or ΔPTH &gt;45 were significantly associated with increased risk of post-thyroidectomy hypocalcemia (P = 0.0001). A ΔPTH &gt;70%, PoPTH ≤15.5 pg/mL, and postoperative serum cCa concentrations&lt;8.0 mg/dL significantly predicted symptomatic hypocalcemia (P = 0.009, P = 0.006, and P = 0.0001, respectively). The sensitivities of ΔPTH, PoPTH level, and postoperative serum cCa concentration to predict symptomatic hypocalcemia were 67%, 64%, and 100%, respectively.

Conclusion
Although PTH decline significantly correlates with symptomatic hypocalcemia, a considerable number of patients may experience hypocalcemic symptoms despite normal PoPTH levels. Analysis of serum Ca concentrations at 24 hours postoperatively help to achieve a more precise prediction of patients who bear a high risk for developing hypocalcemic symptoms.
Amplification and Attenuation Across USArray Using Ambient Noise Wavefront Tracking
Authors: Bowden Daniel C. , Tsai Victor C. , Lin Fan‐Chi 
Published: November 2017

AbstractAs seismic traveltime tomography continues to be refined using data from the vast USArray data set, it is advantageous to also exploit the amplitude information carried by seismic waves. We use ambient noise cross correlation to make observations of surface wave amplification and attenuation at shorter periods (8–32 s) than can be observed with only traditional teleseismic earthquake sources. We show that the wavefront tracking approach can be successfully applied to ambient noise correlations, yielding results quite similar to those from earthquake observations at periods of overlap. This consistency indicates that the wavefront tracking approach is viable for use with ambient noise correlations, despite concerns of the inhomogeneous and unknown distribution of noise sources. The resulting amplification and attenuation maps correlate well with known tectonic and crustal structure; at the shortest periods, our amplification and attenuation maps correlate well with surface geology and known sedimentary basins, while our longest period amplitudes are controlled by crustal thickness and begin to probe upper mantle materials. These amplification and attenuation observations are sensitive to crustal materials in different ways than traveltime observations and may be used to better constrain temperature or density variations. We also value them as an independent means of describing the lateral variability of observed Rayleigh wave amplitudes without the need for 3‐D tomographic inversions.
Hyporheic Passive Flux Meters Reveal Inverse Vertical Zonation and High Seasonality of Nitrogen Processing in an Anthropogenically Modified Stream (Holtemme, Germany)
Authors: Kunz Julia Vanessa , Annable Michael D. , Rao Suresh , Rode Michael , Borchardt Dietrich 
Published: November 2017

AbstractTransformation and retention of nitrogen and other biologically reactive solutes in the hyporheic zones of running water contribute to an essential ecosystem service. However, the synoptic impact of intense agricultural or urban land‐uses, elevated nutrient loading, flow alterations, riparian clear‐cutting, and channelization on the source‐sink behavior of solutes in hyporheic zones remains largely uncharacterized and unquantified. Therefore, we studied nutrient dynamics in a hydromorphologically and chemically modified stream reach using a new monitoring approach allowing the simultaneous measurement of nutrient and water flux through a screened area in the subsurface of rivers (hyporheic passive flux meter, HPFM). With HPFMs we directly assessed time‐integrated lateral hyporheic nitrate fluxes during early spring and midsummer covering different temperature and discharge regimes. Contrary to our expectations, higher stream discharge coincided with substantially lower hyporheic exchange rates. While in streams featuring a natural morphology, bed form induced exchange commonly increases with surface flow, the influence of groundwater level was dominant in this reach. Furthermore, in contrast to less impacted environments, where progressive substrate depletion with depths reduces metabolic rates in the subsurface, we identified not the upper, but the intermediate layer of the hyporheic zone as hot spot of nutrient turnover. Overall, the hyporheic zone at the study site functioned partly as nitrate source, partly as a sink. Neither of the commonly used determinants redox state and residence time could explain this source or sink function. Our results give clear evidence to carefully transfer the knowledge of hyporheic zone processes from “natural” systems to anthropologically modified streams.
A Practical, Robust Methodology for Acquiring New Observation Data Using Computationally Expensive Groundwater Models
Authors: Siade Adam J. , Hall Joel , Karelse Robert N. 
Published: November 2017

AbstractRegional groundwater flow models play an important role in decision making regarding water resources; however, the uncertainty embedded in model parameters and model assumptions can significantly hinder the reliability of model predictions. One way to reduce this uncertainty is to collect new observation data from the field. However, determining where and when to obtain such data is not straightforward. There exist a number of data‐worth and experimental design strategies developed for this purpose. However, these studies often ignore issues related to real‐world groundwater models such as computational expense, existing observation data, high‐parameter dimension, etc. In this study, we propose a methodology, based on existing methods and software, to efficiently conduct such analyses for large‐scale, complex regional groundwater flow systems for which there is a wealth of available observation data. The method utilizes the well‐established d‐optimality criterion, and the minimax criterion for robust sampling strategies. The so‐called Null‐Space Monte Carlo method is used to reduce the computational burden associated with uncertainty quantification. And, a heuristic methodology, based on the concept of the greedy algorithm, is proposed for developing robust designs with subsets of the posterior parameter samples. The proposed methodology is tested on a synthetic regional groundwater model, and subsequently applied to an existing, complex, regional groundwater system in the Perth region of Western Australia. The results indicate that robust designs can be obtained efficiently, within reasonable computational resources, for making regional decisions regarding groundwater level sampling.
Water Saturation Relations and Their Diffusion‐Limited Equilibration in Gas Shale: Implications for Gas Flow in Unconventional Reservoirs
Authors: Tokunaga Tetsu K. , Shen Weijun , Wan Jiamin , Kim Yongman , Cihan Abdullah , Zhang Yingqi , Finsterle Stefan 
Published: November 2017

AbstractLarge volumes of water are used for hydraulic fracturing of low permeability shale reservoirs to stimulate gas production, with most of the water remaining unrecovered and distributed in a poorly understood manner within stimulated regions. Because water partitioning into shale pores controls gas release, we measured the water saturation dependence on relative humidity (rh) and capillary pressure (Pc) for imbibition (adsorption) as well as drainage (desorption) on samples of Woodford Shale. Experiments and modeling of water vapor adsorption into shale laminae at rh = 0.31 demonstrated that long times are needed to characterize equilibrium in larger (5 mm thick) pieces of shales, and yielded effective diffusion coefficients from 9 × 10−9 to 3 × 10−8 m2 s−1, similar in magnitude to the literature values for typical low porosity and low permeability rocks. Most of the experiments, conducted at 50°C on crushed shale grains in order to facilitate rapid equilibration, showed significant saturation hysteresis, and that very large Pc (∼1 MPa) are required to drain the shales. These results quantify the severity of the water blocking problem, and suggest that gas production from unconventional reservoirs is largely associated with stimulated regions that have had little or no exposure to injected water. Gravity drainage of water from fractures residing above horizontal wells reconciles gas production in the presence of largely unrecovered injected water, and is discussed in the broader context of unsaturated flow in fractures.
Direct Fabrication of Flexible Ni Microgrid Transparent Conducting Electrodes via Electroplated Metal Transfer
Authors: Park Jeonghwan , Lee Kangmin , Um Han‐Don , Kim Ka‐Hyun , Seo Kwanyong 
Published: November 2017

AbstractA cost‐effective process is reported for fabricating flexible transparent conducting electrodes (TCEs) through the use of a reusable silicon master mold with a microgrid patterned Ag/Cr–metal double layer. Flexible TCEs can be simply produced via metal electroplating on the master mold followed by metal transfer onto a flexible polymer substrate. Nickel (Ni), an inexpensive metal, is used as the TCE material in this study, allowing low‐cost TCE fabrication. The fabricated flexible Ni TCEs exhibit excellent optical and electrical properties (sheet resistance of 6.1 Ω sq−1 with 96% transmittance) along with outstanding mechanical flexibility with no significant change in sheet resistance after 1000 bending cycles at a bending radius of 4 mm. A touch screen panel is also successfully demonstrated using an Ni microgrid TCE to confirm the practical applicability of these TCEs. The results indicate that the proposed flexible Ni microgrid TCEs have potential for rapid commercialization because of their high optoelectronic performance, low cost, and facile fabrication process.
A Hazardous Materials Educational Curriculum Improves Pediatric Emergency Department Staff Skills
Authors: Hewett Elizabeth K. , Nagler Joshua , Monuteaux Michael C. , Morin Michele , Devine Mary , Carestia Michelle , Chung Sarita 
Published: November 2017

AbstractObjectiveEmergency department (ED) providers require competency in responding to hazardous materials (HAZMAT) events. The optimal strategies to teach HAZMAT response principles to ED providers and to ensure skill retention are not known. Our aim was to design, implement, and evaluate a multifaceted, interprofessional educational curriculum for pediatric ED staff to improve their skills, knowledge, and confidence in responding to a HAZMAT event.MethodsIn this longitudinal cohort study, we created and assessed a 3‐hour educational curriculum comprised of didactics, skills stations, a tabletop exercise, and a simulated multivictim disaster. Learning objectives included critical aspects of pediatric HAZMAT incident response with an emphasis on donning personal protective equipment (PPE). The primary outcome was the number of HAZMAT PPE donning steps correctly completed within 10 minutes at pre‐ and postcurriculum assessments measured using a 32‐item checklist. Secondary outcomes included skill retention at 3 months, change in knowledge assessed using multiple‐choice questions, and change in participant confidence.ResultsEighty‐one of 84 participants (96%) completed the entire curriculum. Compared to the precurriculum assessment, participants completed more donning steps correctly after the intervention (mean increase = 58%, 95% confidence interval [CI] = 48%–70%). Relative to the baseline, more steps were also correctly completed at 3 months (mean increase = 49%, 95% CI = 38%–61%). Performance on multiple‐choice knowledge questions and confidence in skills also significantly increased from the pre‐ to postcurriculum assessments.ConclusionsA newly developed HAZMAT educational curriculum improved skills‐based performance, knowledge, and confidence in PPE and decontamination skills. Brief, multifaceted educational interventions for ED staff can effectively develop sustainable skills needed for uncommon emergency events.