bluuebunny/crossref_metadata_2025_split huggingface dataset:
La web 2.0 en la universidad de Huelva. Estilos de uso educativo
Authors: Boza Carreño Ángel , Conde Vélez Sara 
Published: July 2017

El trabajo que se presenta a continuación se centra en el análisis de estilos de uso educativo que el alumnado hace de la web 2.0 con el propósito de promover el conocimiento y beneficios de las misma y hacer propuestas que favorezcan la incorporación y uso de las herramientas de la web 2.0. Para la recogida de datos se aplica una escala ad hoc sobre una muestra de 403 alumnos de diferentes titulaciones de la universidad de Huelva. Para el tratamiento de los datos se hace un Análisis de Correspondencia Múltiples. A partir de los resultados obtenidos, se identifican tres estilos de uso educativo entre el alumnado de la universidad de Huelva, 1) Estilo enfocado al trabajo individualista y autónomo; 2) Estilo enfocado a la utilidad y aspectos positivos de la Web 2.0 ; y 3) Estilo enfocado al impacto de la Web 2.0 y dificultades encontradas. Es inegable que el uso de la web 2.0 posibilita aspectos positivos.
Internações por condições sensíveis à atenção primária após a implantação da estratégia saúde da família no município de Petrópolis/RJ Hospitalizations due to primary care sensitive conditions after family health strategy implementation on Petrópolis/RJ
Authors: Scudese Camilla Zarlotti , Scudese Estêvão , Senna Gilmar Weber , Tonini Teresa , Lopes Taís , Pestana Carlos 
Published: July 2017

Objetivo: Quantificar as internações por condições sensíveis à atenção primária (ICSAP), comparando-as com a taxa bruta de internações e analisar sua frequência junto à cobertura do Programa Saúde da Família (PSF) em Petrópolis-RJ. Métodos: Após consulta no SIH-SUS, obteve-se a taxa bruta de ICSAP entre 1999-2013. Foi estabelecida a razão entre a soma destas internações e o número de residentes no município, multiplicado por mil. O coeficiente de correlação de Pearson foi utilizado para a análise de correlação entre as variáveis. Resultados: Houve redução de 54,4% nas ICSAP no período estudado. Observamos uma redução das CSAP sobre o total de internações de 19,9%, para 16,5%. A redução na taxa de ICSAP apresentou forte correlação com o aumento da cobertura do PSF. Conclusão: As mudanças ocorridas são significativas e estimulam o aprofundamento do estudo da eficácia das estratégias como o PSF sobre a redução das ICSAP em diferentes municípios. Descritores: Saúde Pública; Atenção Primária à Saúde; Estratégia Saúde da Família; Planos e Programas de Saúde; Avaliação de Programas e Projetos de Saúde; Hospitalização.
Ficha de avaliação clínica de membros inferiores para prevenção do pé diabético Clinical evaluation form of lower members for diabetic foot prevention
Authors: Mello Rodrigo da Fontoura de Albuquerque , Pires Maria Lúcia Elias , Kede Jorge 
Published: July 2017

Objetivo: Elaborar ficha de avaliação clínica (FAC) dos membros inferiores (MIs) para prevenção do pé diabético (PD). Métodos: Partindo de revisão da literatura, elaborou-se uma FAC com 4 fases: as fases1 e 2contemplam o exame clínico (anamnese e exame físico, respectivamente) com ênfase na avaliação dos pés e na pesquisa de fatores de risco para úlceras; a fase 3 avalia o autocuidado com os pés e a fase 4 descreve as principais orientações para este cuidado. Resultados: Após a realização das fases 1 e 2 segueuma classificação de risco de ulceração dos pés. A fase 3 avalia com dez questões os cuidados com os pés e a fase 4 apresentadez orientações educacionais para prevenção do PD. Conclusão: A FAC proposta possibilita detectar e intervir precocemente no risco de ulceração nos pés. Descritores: Pé diabético, Neuropatia diabética, Doença vascular periférica, Prevenção, Cuidado com os pés
Passive remote sensing of altitude and optical depth of dust plumes using the oxygen A and B bands: First results from EPIC/DSCOVR at Lagrange‐1 point
Authors: Xu Xiaoguang , Wang Jun , Wang Yi , Zeng Jing , Torres Omar , Yang Yuekui , Marshak Alexander , Reid Jeffrey , Miller Steve 
Published: July 2017

AbstractWe presented an algorithm for inferring aerosol layer height (ALH) and optical depth (AOD) over ocean surface from radiances in oxygen A and B bands measured by the Earth Polychromatic Imaging Camera (EPIC) on the Deep Space Climate Observatory (DSCOVR) orbiting at Lagrangian‐1 point. The algorithm was applied to EPIC imagery of a 2 day dust outbreak over the North Atlantic Ocean. Retrieved ALHs and AODs were evaluated against counterparts observed by Cloud‐Aerosol Lidar with Orthogonal Polarization (CALIOP), Moderate Resolution Imaging Spectroradiometer, and Aerosol Robotic Network. The comparisons showed 71.5% of EPIC‐retrieved ALHs were within ±0.5 km of those determined from CALIOP and 74.4% of EPIC AOD retrievals fell within a ± (0.1 + 10%) envelope of MODIS retrievals. This study demonstrates the potential of EPIC measurements for retrieving global aerosol height multiple times daily, which are essential for evaluating aerosol profile simulated in climate models and for better estimating aerosol radiative effects.
Relativistic electron dynamics produced by azimuthally localized poloidal mode ULF waves: Boomerang‐shaped pitch angle evolutions
Authors: Hao Y. X. , Zong Q.‐G. , Zhou X.‐Z. , Rankin R. , Chen X. R. , Liu Y. , Fu S. Y. , Spence H. E. , Blake J. B. , Reeves G. D. 
Published: July 2017

AbstractWe present an analysis of “boomerang‐shaped” pitch angle evolutions of outer radiation belt relativistic electrons observed by the Van Allen Probes after the passage of an interplanetary shock on 7 June 2014. The flux at different pitch angles is modulated by Pc5 waves, with equatorially mirroring electrons reaching the satellite first. For 90° pitch angle electrons, the phase change of the flux modulations across energy exceeds 180° and increasingly tilts with time. Using estimates of the arrival time of particles of different pitch angles at the spacecraft location, a scenario is investigated in which shock‐induced ULF waves interact with electrons through the drift resonance mechanism in a localized region westward of the spacecraft. Numerical calculations on particle energy gain with the modified ULF wavefield reproduce the observed boomerang stripes and modulations in the electron energy spectrogram. The study of boomerang stripes and their relationship to drift resonance taking place at a location different from the observation point adds new understanding of the processes controlling the dynamics of the outer radiation belt.
Electron dynamics surrounding the X line in asymmetric magnetic reconnection
Authors: Zenitani Seiji , Hasegawa Hiroshi , Nagai Tsugunobu 
Published: July 2017

AbstractElectron dynamics surrounding the X line in magnetopause‐type asymmetric reconnection is investigated using a two‐dimensional particle‐in‐cell simulation. We study electron properties of three characteristic regions in the vicinity of the X line. The fluid properties, velocity distribution functions (VDFs), and orbits are studied and cross‐compared. On the magnetospheric side of the X line, the normal electric field enhances the electron meandering motion from the magnetosheath side. The motion leads to a crescent‐shaped component in the electron VDF, in agreement with recent studies. On the magnetosheath side of the X line, the magnetic field line is so stretched in the third dimension that its curvature radius is comparable with typical electron Larmor radius. The electron motion becomes nonadiabatic, and therefore the electron idealness is no longer expected to hold. Around the middle of the outflow regions, the electron nonidealness is coincident with the region of the nonadiabatic motion. Finally, we introduce a finite‐time mixing fraction (FTMF) to evaluate electron mixing. The FTMF marks the magnetospheric side of the X line, where the nonideal energy dissipation occurs.
Generation of parallel and quasi‐perpendicular EMIC waves and mirror waves by fast magnetosonic shocks in the solar wind
Authors: Lee K. H. 
Published: July 2017

AbstractThis paper presents a simulation study on the generation of electromagnetic ion cyclotron (EMIC) waves and mirror waves associated with fast magnetosonic shocks in the solar wind or the bow shock ahead of the magnetosphere. Strong fast magnetosonic shocks are often observed in these regions. In the shock downstream region, hydrogen ions (H+) and helium ions (He++) are strongly heated to high ion beta and large temperature anisotropy. The helium ions have a bunch distribution in the perpendicular velocity phase space in the immediate downstream region. These conditions can lead to generation of strong EMIC waves and mirror waves, which are often identified in satellite observations. In the simulations with a background magnetic field being in the simulation plane, the dominant EMIC waves are left‐handed polarized and propagate parallel to the background field. The nearly perpendicular (~85°) EMIC waves of right‐handed polarization excited at large wave numbers (kVA1/ΩH1 ≈ 3) show weak but nonnegligible wave energy. The effect of minor helium ions on wave excitation is found to be small. Mirror waves grow to large amplitudes when both the downstream ion beta and temperature anisotropy are high. Various wave modes are identified by ω − k dispersion analysis. For the cases with a background magnetic field making a large angle with the simulation plane, the mirror waves dominate, and nonlinear coalescence of mirror waves is clearly observed downstream.
Yttrium–Benzyl Complexes Bearing Chiral Iminophosphonamide Ligands: Synthesis and Application in Catalytic Asymmetric Amine‐Silane Dehydrocoupling Reactions
Authors: Li Nan , Guan Bing‐Tao 
Published: July 2017

AbstractA series of novel iminophosphonamide ligands with chiral diamine moieties were designed and synthesized. Yttrium–benzyl compounds bearing these chiral iminophosphonamide ligands showed high reactivity and selectivity on the first catalytic asymmetric cross‐dehydrogenative coupling of amines with prochiral silanes under mild conditions. A stable silylamine–boron derivative was synthesized in up to 23% ee, as determined by chiral HPLC analysis. By employing this catalyst system, catalytic kinetic resolution of an axially chiral silane and further in situ allylation were achieved in good yields and enantioselectivities.magnified image
Advanced Porous Carbon Materials for High‐Efficient Lithium Metal Anodes
Authors: Ye Huan , Xin Sen , Yin Ya‐Xia , Guo Yu‐Guo 
Published: July 2017

AbstractMetallic lithium is considered as a competitive anode candidate for rechargeable Li batteries due to its ultrahigh theoretical specific capacity of 3860 mA h g−1. However, hurdles regarding the uneven Li deposition, unstable solid electrolyte interphase formation, and infinite change of relative dimensions challenge its practical application. Porous carbons (PCs), due to their high conductivity and stable electrochemistry, have been demonstrated feasible as host materials for stable plating of Li to address the above issues. This research news focuses on the recent progress in the development of advanced PC host materials for stable Li metal anode. It also provides perspectives regarding a rational design of PC for Li plating.
Hoch fluoreszierende Pyridiniumbetaine für die Lichtsammlung
Authors: Xu Jingjing , Zhang Bolong , Jansen Marina , Goerigk Lars , Wong Wallace W. H. , Ritchie Chris 
Published: July 2017

AbstractDie Ergebnisse experimenteller und theoretischer Untersuchungen der Eigenschaften von Pyridiniumenolaten werden vorgestellt, und ihre potenzielle Nutzbarkeit in Lichtsammelanwendungen, insbesondere lumineszierenden Solarkonzentratoren (LSCs), wird demonstriert. Synthesen, Strukturen, photophysikalische Charakterisierung und wellenfunktionsbasierte quantenchemische Studien für fünf Cyclobetaine werden präsentiert und die Leistungsfähigkeit einer LSC‐Apparatur, die eines dieser Cyclobetaine enthält, wird mit dem aktuellen Stand der Technik verglichen.
Divergent Asymmetric Synthesis of Polycyclic Compounds via Vinyl Triazenes
Authors: Kossler David , Perrin Florian G. , Suleymanov Abdusalom A. , Kiefer Gregor , Scopelliti Rosario , Severin Kay , Cramer Nicolai 
Published: July 2017

AbstractVinyl triazenes were obtained by enantioselective [2+2] cycloaddition reactions of bicyclic alkenes with 1‐alkynyl triazenes in the presence of a RuII catalyst with a chiral cyclopentadienyl ligand. These triazenes serve as unique vinyl cation surrogates. Under acidic conditions, the triazene functionality can be replaced with a variety of groups, including halides, alkoxides, sulfoxides, amides, arenes, and heteroarenes, thus providing efficient access to a pool of chiral polycyclic compounds.
Highly Fluorescent Pyridinium Betaines for Light Harvesting
Authors: Xu Jingjing , Zhang Bolong , Jansen Marina , Goerigk Lars , Wong Wallace W. H. , Ritchie Chris 
Published: July 2017

AbstractWe report the findings of our experimental and theoretical investigations into the properties of pyridinium enolates and their potential utility in light‐harvesting applications, such as in luminescent solar concentrators (LSCs). We present the synthesis, structures, photophysical characterization, and wavefunction‐based quantum‐chemical studies of five cyclobetaines. The performance of an LSC device incorporating one of these cyclobetaines is shown to be comparable to state‐of‐the‐art devices.
Structural studies and biological activity evaluation of Pd(II), Pt(II) and Ru(II) complexes containing N‐phenyl, N`‐(3‐triazolyl)thiourea
Authors: Mansour Ahmed M. 
Published: July 2017

[MCl(H2L)(OH2)]·1.5H2O (M = Pd(II) (1) and Pt(II) (2)) and [Ru(H2L)2(OH2)2]·3H2O (3) (H3L: N‐phenyl, N`‐(3‐triazolyl)thiourea) were synthesized, characterized and tested for their antibacterial activities against Staphylococcus aureus and Escherichia coli bacteria. The thiourea derivative is coordinated to Mn+ ions as a mono‐negatively N,S‐bidentate ligand via the enolization of C = S group and triazole N center. The density functional theory calculations reveal that presence of a water molecule in a trans position to triazole ring increased the stability of d8 metal ions complexes via the formation of strong Cl…NH intramolecular H‐bond. The cis‐Ru(II)‐isomer with two isoenergetically H2L− molecules are more stable than the trans‐analog. Coordination of H3L to Ru(II) ion did not alter the toxicity of the free ligand, while the interaction with the d8 metal ions gave rise to inactive compounds.
Melt linear viscoelastic rheological analysis to assess the microstructure of polyamide 6–acrylonitrile butadiene styrene terpolymer immiscible blends via the application of fractional Zener and Coran models
Authors: Aminjafari Mahboobeh , Entezam Mehdi , Sadeghi Morteza , Masoumi Mahmood , Khonakdar Hossein Ali , Jafari Seyed Hassan 
Published: July 2017

ABSTRACTIn this study, the melt linear viscoelastic rheological properties of polyamide 6 (PA6)–acrylonitrile butadiene styrene terpolymer (ABS) immiscible blends were analyzed with the help of Coran and fractional Zener models (FZMs) to assess the microstructure of the blends. For this purpose, dynamic shear flow experiments and scanning electron microscopy investigations were performed. The nonzero value of the elastic modulus of the spring element (Ge) of the FZM for ABS‐rich blends was explained by the formation of a networklike structure because of the agglomeration of the rubber phases of the ABS matrix, whereas for the PA6‐rich blends with a high content of ABS, the interactions and/or interconnectivity of the ABS dispersed phase led to a nonzero value of Ge. The value of the fitting parameter of the Coran model (f) was near to 0.5 for the 50/50 blend; this was fully in agreement with the formed cocontinuous morphology for this blend composition. On the other hand, the f value for the blends with a matrix–droplet‐type morphology was near to zero for the PA6‐rich blends; this indicated the lower continuity of the ABS dispersed phase as a harder phase compared to the PA6 soft matrix, whereas the f value was near to 1 for ABS‐rich blends. This confirmed the formation of an interconnected networklike structure for this series of blends. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45423.
Quartz crystal resonator study of glass transitions in polyvinylbutyral (PVB) films
Authors: Du Xianbin , Tang Xuefeng , Fang Jiajie , Zhu Da‐Ming 
Published: July 2017

ABSTRACTGlass transitions in polyvinylbutyral (PVB) films deposited on a gold substrate have been studied using a quartz crystal resonator technique by measuring the resonant frequency shift and resonant peak broadening of the quartz crystal coated with a PVB film. Using the measured frequency shift and peak broadening of the resonance of the quartz crystal due to changes in the coated PVB film, the storage moduli of the film were derived. The results show rapid drops in the storage moduli of the PVB films at temperature closer to that of glass transition of bulk PVB. The transitions at different frequencies were assessed by simultaneously measuring the resonance of the quartz crystal at multiple harmonics. No significant change in the glass transition temperature at multiple harmonics was observed. The results of the storage moduli for PVB films of different thickness show that glass transition temperatures in the films decrease with the film thickness; the decrease become more noticeable as the film thickness is less than 500 nm where the characteristic of changing of storage moduli become distinctly different from that in thicker film and in bulk materials. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45433.
Electrical and morphological properties of microinjection molded polypropylene/carbon nanocomposites
Authors: Zhou Shengtai , Hrymak Andrew , Kamal Musa 
Published: July 2017

ABSTRACTA series of different carbon (carbon black, carbon nanotubes, and graphite nanoplatelets) filled polypropylene nanocomposites were prepared by melt blending, then followed by compression molding or microinjection molding (µIM). Direct current electrical conductivity measurements and melt rheology tests were utilized to detect the percolated structure for compression molded polypropylene/carbon nanocomposites. For µIM, a rectangular mold insert which has a three‐step decrease in thickness along the flow direction was adopted to study the effect of abrupt changes in mold geometry on the electrical and morphological properties of subsequent micromoldings (µ‐moldings). Results indicated that the µ‐moldings exhibited a higher percolation threshold when compared with their compression molded counterparts. This is largely due to the severe shearing conditions that prevail in the µIM process. The morphology of µ‐moldings containing different carbon fillers was examined using scanning electron microscopy. The development of corresponding microstructure is found to be strongly dependent on the types of carbon fillers used in µIM, which is crucial to the enhancement of electrical conductivity for the resulting µ‐moldings. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45462.
Linking morphology changes to barrier properties of polymeric packaging for microwave‐assisted thermal sterilized food
Authors: Zhang Hongchao , Bhunia Kanishka , Munoz Nydia , Li Li , Dolgovskij Michail , Rasco Barbara , Tang Juming , Sablani Shyam S. 
Published: July 2017

ABSTRACTIt is a priority to develop polymeric packaging that can withstand microwave‐assisted thermal sterilization (MATS) and maintain the quality of low‐acid foods during long‐term storage. In this study, we explored changes in the morphology of pouch films with two multi‐layer structures. The films are based on barrier layers of metal oxide‐coated poly(ethylene terephthalate) (PET) (film A) and ethylene vinyl alcohol (EVOH) (film B). A 8‐oz model food in pouches was processed with MATS (F0 = 9.0 min) and stored at 23, 35 and 45 °C for up to 12 months. Findings reveal that the oxygen barrier of film A was influenced by the coating and crystallinity of PET. The oxygen barrier of film B was primarily affected by the moisture content of the EVOH polymer. Results also show that changes in barrier properties depended on storage temperature. Recrystallization in polymer might be an important morphological change that occurs during storages. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45481.
In vitro evidence for the participation of Drosophila melanogaster sperm β‐N‐acetylglucosaminidases in the interactions with glycans carrying terminal N‐acetylglucosamine residues on the egg's envelopes
Authors: Intra Jari , Veltri Concetta , De Caro Daniela , Perotti Maria Elisa , Pasini Maria Enrica 
Published: July 2017

AbstractFertilization is a complex and multiphasic process, consisting of several steps, where egg‐coating envelope's glycoproteins and sperm surface receptors play a critical role. Sperm‐associated β‐N‐acetylglucosaminidases, also known as hexosaminidases, have been identified in a variety of organisms. Previously, two isoforms of hexosaminidases, named here DmHEXA and DmHEXB, were found as intrinsic proteins in the sperm plasma membrane of Drosophila melanogaster. In the present work, we carried out different approaches using solid‐phase assays in order to analyze the oligosaccharide recognition ability of D. melanogaster sperm hexosaminidases to interact with well‐defined carbohydrate chains that might functionally mimic egg glycoconjugates. Our results showed that Drosophila hexosaminidases prefer glycans carrying terminal β‐N‐acetylglucosamine, but not core β‐N‐acetylglucosamine residues. The capacity of sperm β‐N‐acetylhexosaminidases to bind micropylar chorion and vitelline envelope was examined in vitro assays. Binding was completely blocked when β‐N‐acetylhexosaminidases were preincubated with the glycoproteins ovalbumin and transferrin, and the monosaccharide β‐N‐acetylglucosamine. Overall, these data support the hypothesis of the potential role of these glycosidases in sperm–egg interactions in Drosophila.