bluuebunny/crossref_metadata_2025_split huggingface dataset:
Continuar o romper. El foro como manera de discutir las preconcepciones de enseñanza de los estudiantes de maestro
Authors: Paredes Joaquín , Sánchez-Antolín Pablo , Tello Inmaculada 
Published: October 2016

Resumen: La tecnología multiplica los espacios donde ocurre la relación pedagógica. Determinadas temáticas en la universidad, como los procesos de reflexión sobre las preconcepciones, permiten en este trabajo analizar una actividad crítica de la formación inicial de docentes. También pensar, simultáneamente, sobre una relación pedagógica ampliada. Los autores dialogan, con sus experiencias de varios años inmersos en este tipo de prácticas, sobre el propósito, las limitaciones, los resultados y la toma de conciencia sobre la profesión. Se han generado actividades de debate mediante foros, tutelados por ellos, en varias materias para la formación de maestros: unas de tipo pedagógico y otra que es el seguimiento de un prácticum. En los resultados de este diálogo se observa satisfacción por los debates y que prima el propósito crítico de la enseñanza sobre las herramientas técnicas utilizadas. Sobre las limitaciones, se observa que la orientación de los debates la establecen los docentes. Los estudiantes se limitan a aceptarlo. También se observa que los procesos emprendidos son más ricos cuando los estudiantes han tomado en sus manos los debates, ha habido discusión, se han generado pautas para comprender los problemas abordados y, en su caso, para actuar como profesionales con una nueva cultura docente. Palabras clave: preconcepciones, docentes, foros, enseñanza universitaria, practicum, teorías educativas Abstract: Technology adds spaces where pedagogical rapport occurs. Some issues at university, as reflective process about preconceptions, add complexity to analize a critical activity in teacher education. Also, to think simultaneously about an amply pedagogical rapport. The authors dialogue with their experiences of several years immersed in these practices, about the purpose, limitations, findings and awareness about the profession. They have generated debate activities through forums in various subjects for teacher training some of a pedagogical subject and another that it is tracking a practicum. Among the results of such debate, it appears satisfaction about debates itself. In addition, that critical purpose of teaching is stronger than technical tools. Among limitations, teachers establish debate directions. Students accept such directions. Also, processes undertaken are better when some students have taken in their hands the debates, there have been discussions, were generated patterns to understand the problems addressed and, where appropriate, to act as professionals with a new teaching culture. Keywords: preconceptions, teachers, forums, higher education, practicum, educational theorieshttp://dx.doi.org/10.7203/eari.7.8003
Compartir experiencias en el proceso de desarrollo de la Tesis Doctoral, sentirse acompañada
Authors: Altuna María , Becerra Laia , De Juan Ainhoa 
Published: October 2016

Resumen: En este trabajo se exponen las reflexiones de tres alumnas de doctorado, cada una de ellas en distinta fase del proceso, sobre los momentos de inflexión vividos durante el desarrollo de su tesis doctoral hasta ahora. Haciendo hincapié en la importancia que para ellas ha tenido el compartir sus experiencias con semejantes. Mediante una narración autobiográfica en forma de diálogo, comenzamos situando el por qué y el cómo de la experiencia, nuestros comienzos. Finalizamos desarrollando la misma, los encuentros, las reuniones, congresos, en definitiva, diferentes momentos en nuestra relación como alumnas de doctorado y la repercusión que estas han tenido en nuestro proceso de aprendizaje. Palabras clave: Tesis doctoral, trabajo cooperativo, relaciones pedagógicas, investigación narrativa autobiográfica, identidad, aprendizaje. Abstract: In this paper are presented the reflections of three PhD students in a different stage of the process. The reflections are about the moments experienced during the course of their PhD until now trying to emphasize the importance that has been sharing their experiences with others. Through an autobiographical narrative in dialogue form, we begin placing the reason of the experience and how it has had place, our beginnings. We finished developing it, the meetings, conferences; finally, different times in our relationship as PhD students are shown and the impact these have had on our learning process. Keywords: PhD, cooperative work, educational relationships, autobiographical narrative research, identity, learning.http://dx.doi.org/10.7203/eari.7.8133
Las reivindicaciones del profesorado de Educación Artística ante los nuevos obstáculos curriculares; el proyecto “Second Round: Art i Lluita a Secundària”
Authors: Huerta Ramón Ricard , Domínguez Ricardo 
Published: October 2016

Resumen: En este artículo se estudia la situación precaria en la que se encuentra la Educación Artística en los niveles no universitarios dentro el ámbito español, realidad que contrasta con el auge que está tomando nuestra especialidad en el conjunto de países de Latinoamérica. La Ley Orgánica 8/2013, de 9 de diciembre, para la mejora de la calidad educativa (LOMCE) nos relega a la mera optatividaden educación secundaria, teniendo en cuenta que en primaria nunca existió la figura del maestro especialista en artes visuales. Frente a ello, iniciativas recientes vienen a reivindicar la importancia la Educación Artística en la etapa de secundaria. Sirva como ejemplo el proyecto “Second Round: Art i lluitaa secundària”nacido a instancias del Grupo CREARI (GIUV2013-103) y del Institut de Creativitat i InnovacionsEducatives (ICIE) de la Universitat de València (UV). En esta misma línea de actuación, los primeros pasos del movimiento asociacionista ligado a la especialidad (AVPD) consiguen reivindicar la necesaria presencia de la educación artística en los currículums oficiales, generandola visibilidad del colectivo. Palabras clave: educación artística, investigación, arte, formación de profesorado, educación secundaria. Abstract: The precarious situation of the Artistic Education in the pre-university courses in the Spanish academic world is analysed in this article, showing the contrast of this reality with the summit that this field is taking in the Latin America countries. The Spanish Organic Law 8/2013, of December 9, for the improvement of the educational quality (LOMCE), sets artistic education aside in secondary education (as an elective subject), bearing in mind that in primary education the figure of the specialized teacher in visual arts has never existed. On the other side, some recent initiatives come to claim the importance the Artistic Education in the stage of secondary education. As an example, the project “ Second Round: Art and struggle in secondary school “ born under the auspice of the Research Group CREARI (GIUV2013-103) and of the Teaching Innovation and Creativity Institute (ICIE) of the Universitat de València.In this course of action, first steps of the association movement linked to the specialty (AVPD) manage to claim the necessary presence of the artistic education in the official curricula, generating the visibility of the group.Keywords: art education, research, art, teachers training, secondary school.http://dx.doi.org/10.7203/eari.7.8977
Incidence of syphilis seroconversion among HIV‐infected persons in Asia: results from the TREAT Asia HIV Observational Database
Authors: Ahn Jin Young , Boettiger David , Kiertiburanakul Sasisopin , Merati Tuti Parwati , Huy Bui Vu , Wong Wing Wai , Ditangco Rossana , Lee Man Po , Oka Shinichi , Durier Nicolas , Choi Jun Yong ,   on behalf of the Treat Asia HIV Observational Database
Published: October 2016

IntroductionOutbreaks of syphilis have been described among HIV‐infected men who have sex with men (MSM) in Western communities, whereas reports in Asian countries are limited. We aimed to characterize the incidence and temporal trends of syphilis among HIV‐infected MSM compared with HIV‐infected non‐MSM in Asian countries.MethodsPatients enrolled in the TREAT Asia HIV Observational Database cohort and with a negative non‐treponemal test since enrolment were analyzed. Incidence of syphilis seroconversion, defined as a positive non‐treponemal test after previously testing negative, was evaluated among patients at sites performing non‐treponemal tests at least annually. Factors associated with syphilis seroconversion were investigated at sites doing non‐treponemal testing in all new patients and subsequently testing routinely or when patients were suspected of having syphilis.ResultsWe included 1010 patients from five sites that performed non‐treponemal tests in all new patients; those included had negative non‐treponemal test results during enrolment and subsequent follow‐ups. Among them, 657 patients were from three sites conducting regular non‐treponemal testing. The incidence of syphilis seroconversion was 5.38/100 person‐years (PY). Incidence was higher in MSM than non‐MSM (7.64/100 PY vs. 2.44/100 PY, p<0.001). Among MSM, the incidence rate ratio (IRR) for every additional year from 2009 was 1.19 (p=0.051). MSM status (IRR 3.48, 95% confidence interval (CI) 1.88–6.47), past syphilis diagnosis (IRR 5.15, 95% CI 3.69–7.17) and younger age (IRR 0.84 for every additional 10 years, 95% CI 0.706–0.997) were significantly associated with syphilis seroconversion.ConclusionsWe observed a higher incidence of syphilis seroconversion among HIV‐infected MSM and a trend to increasing annual incidence. Regular screening for syphilis and targeted interventions to limit transmission are needed in this population.
Epitaxial growth of monolayer MoSe2 on GaAs
Authors: Onomitsu Koji , Krajewska Aleksandra , Neufeld Ryan A. E. , Maeda Fumihiko , Kumakura Kazuhide , Yamamoto Hideki 
Published: October 2016

Abstract
We realized 1–4 monolayer MoSe2 films on Se-terminated GaAs (111)B 2-in. substrates by molecular beam epitaxy. Atomically flat GaAs wafers were prepared by the migration-enhanced epitaxy method, and MoSe2 layers were successfully grown on Se-terminated GaAs (111)B surfaces with layer-number control over the entire wafer area. The obtained MoSe2 crystal is well aligned on the GaAs (111)B surface. The quasi-van der Waals gap formed between a Se-terminated GaAs (111)B surface and MoSe2 was directly observed with a scanning transmission electron microscope. All A1g Raman peaks from 93 points on 2-in. monolayer MoSe2 are distributed within 0.25 cm−1, indicating excellent spatial uniformity.
Impedance spectroscopic analysis of nanoparticle functionalized graphene/p-Si Schottky diode sensors
Authors: Uddin Md Ahsan , Singh Amol , Daniels Kevin , Vogt Thomas , Chandrashekhar M. V. S. , Koley Goutam 
Published: October 2016

Abstract
Metallic nanoparticle (NP) functionalized graphene/p-Si Schottky diode (chemidiode) sensors have been investigated through dc amperometric and ac impedance spectroscopic (IS) measurements. Four fold sensitivity enhancement for NH3 is demonstrated after Pt nanoparticle functionalization of graphene/p-Si Schottky diode sensor, and the response is also orders of magnitude higher compared to functionalized graphene chemiresistor. Experimentally obtained impedance spectra were modeled utilizing an equivalent circuit for both sensor types, and the junction resistance and capacitance were extracted for various gaseous analytes exposure. Variations in junction resistance, capacitance and 3-dB cut-off frequency plotted in three-dimensional (3D) enables extraction of unique signatures for various analyte gases.
Glacial landscape evolution by subglacial quarrying: A multiscale computational approach
Authors: Ugelvig Sofie V. , Egholm David L. , Iverson Neal R. 
Published: October 2016

AbstractQuarrying of bedrock is a primary agent of subglacial erosion. Although the mechanical theory behind the process has been studied for decades, it has proven difficult to formulate the governing principles so that large‐scale landscape evolution models can be used to integrate erosion over time. The existing mechanical theory thus stands largely untested in its ability to explain postglacial topography. In this study we relate the physics of quarrying to long‐term landscape evolution with a multiscale approach that connects meter‐scale cavities to kilometer‐scale glacial landscapes. By averaging the quarrying rate across many small‐scale bedrock steps, we quantify how regional trends in basal sliding speed, effective pressure, and bed slope affect the rate of erosion. A sensitivity test indicates that a power law formulated in terms of these three variables provides an acceptable basis for quantifying regional‐scale rates of quarrying. Our results highlight the strong influence of effective pressure, which intensifies quarrying by increasing the volume of the bed that is stressed by the ice and thereby the probability of rock failure. The resulting pressure dependency points to subglacial hydrology as a primary factor for influencing rates of quarrying and hence for shaping the bedrock topography under warm‐based glaciers. When applied in a landscape evolution model, the erosion law for quarrying produces recognizable large‐scale glacial landforms: U‐shaped valleys, hanging valleys, and overdeepenings. The landforms produced are very similar to those predicted by more standard sliding‐based erosion laws, but overall quarrying is more focused in valleys, and less effective at higher elevations.
Ocean surface cross sections for shipborne HFSWR with sway motion
Authors: Sun Minglei , Xie Junhao , Ji Zhenyuan , Yao Guowei 
Published: October 2016

AbstractTo interpret the essential characteristics of the sea echo backscattered from the ocean surface, the first‐ and second‐order ocean surface cross sections are mathematically derived for an omnidirectional receiving sensor in monostatic shipborne high‐frequency surface wave radar (HFSWR), where the uniform linear motion and sway motion are involved simultaneously. The derived cross sections could be reduced to the existing results in HFSWR on a floating platform, shipborne HFSWR with uniform linear motion, and even a stationary land‐based HFSWR. The illustrations and discussions are presented based on the simulated Doppler spectra under different situations. Aside from the Bragg lines broadening due to the uniform linear motion and its variation with wind direction, the sway motion generates additional Doppler spectra, which emerge with the uniform spacing of sway frequency. The theoretical derivations and analyses based on simulations may be of importance to future investigations and applications, not only in target detection but also in ocean remote sensing.
Changes in cardiorespiratory fitness predict incident hypertension: A population‐based long‐term study
Authors: Jae Sae Young , Kurl Sudhir , Franklin Barry A. , Laukkanen Jari A. 
Published: October 2016

AbstractObjectivesWe investigated whether long‐term changes in cardiorespiratory fitness (CRF) predict the risk of incident hypertension, independent of risk factors, in initially normotensive men.MethodsThis prospective study from the Kuopio Ischemic Heart Disease Study included 431 male participants without hypertension who underwent symptom‐limited maximal cardiopulmonary exercise testing at baseline and during a second examination, 11‐years later, who were re‐evaluated for hypertension at 20‐year follow‐up. Changes in CRF (%) were calculated as the difference in directly measured maximal oxygen uptake (VO2max) between the baseline and second examination, and classified into decreasing tertiles as percentages. Hypertension was defined as systolic and/or diastolic blood pressure ≥140/90 mmHg or hypertension that required antihypertensive medication as diagnosed by a physician.ResultsDuring a 10‐year follow‐up after the second examination, 165 men (38%) developed hypertension. Men who demonstrated the largest decline in CRF between evaluations (−62.1% to −20.2%) had a 4.33‐fold (95% CI 2.32–8.07, P < .001) risk of incident hypertension compared to men with the smallest decrease or improvement in CRF (−8.8% to 82.0%), after adjusting for age, follow‐up duration, alcohol consumption, cigarette smoking, serum low and high density lipoprotein cholesterol, body mass index, daily energy expenditure (kcal) via physical activity, glomerular filtration rate, and baseline systolic blood pressure and VO2max.ConclusionsThe present findings indicate that more marked decreases in measured CRF over time are independently associated with the risk of incident hypertension in men, suggesting that CRF should be considered a causal risk factor to predict future hypertension.
Directional Potassium Transport through a Unimolecular Peptide Channel
Authors: Su Ge , Zhang Min , Si Wen , Li Zhan‐Ting , Hou Jun‐Li 
Published: October 2016

AbstractThree unimolecular peptide channels have been designed and prepared by using the β‐helical conformation of gramicidin A (gA). The new peptides bear one to three NH3+groups at the N‐end and one to three CO2−groups at the C‐end. These zwitterionic peptides were inserted into lipid bilayers in an orientation‐selective manner. Conductance experiments on planar lipid bilayers showed that this orientation bias could lead to observable directional K+transport under multi‐channel conditions. This directional transport behavior can further cause the generation of a current across a planar bilayer without applying a voltage. More importantly, in vesicles with identical external and internal KCl concentrations, the channels can pump K+across the lipid bilayer and cause a membrane potential.
A One‐Pot Cascade Reaction Combining an Encapsulated Decarboxylase with a Metathesis Catalyst for the Synthesis of Bio‐Based Antioxidants
Authors: Gómez Baraibar Álvaro , Reichert Dennis , Mügge Carolin , Seger Svenja , Gröger Harald , Kourist Robert 
Published: October 2016

AbstractThe combination of enzymes with traditional chemical catalysts unifies the high selectivity of the former with the versatility of the latter. A major challenge of this approach is the difference in the optimal reaction conditions for each catalyst type. In this work, we combined a cofactor‐free decarboxylase with a ruthenium metathesis catalyst to produce high‐value antioxidants from bio‐based precursors. As suitable ruthenium catalysts did not show satisfactory activity under aqueous conditions, the reaction required the use of an organic solvent, which in turn significantly reduced enzyme activity. Upon encapsulation of the decarboxylase in a cryogel, the decarboxylation could be conducted in an organic solvent, and the recovery of the enzyme after the reaction was facilitated. After an intermediate drying step, the subsequent metathesis in pure organic solvent proved to be straightforward. The synthetic utility of the cascade was demonstrated by the synthesis of the antioxidant 4,4′‐dihydroxystilbene in an overall yield of 90 %.
Synthesis of β‐Boryl‐α‐Aminosilanes by Copper‐Catalyzed Aminoboration of Vinylsilanes
Authors: Kato Kodai , Hirano Koji , Miura Masahiro 
Published: October 2016

AbstractA copper‐catalyzed regioselective and stereospecific aminoboration of vinylsilanes with bis(pinacolato)diboron (pinB‐Bpin) and hydroxylamines has been developed. In the presence of a CuCl/MeO‐dppbz catalyst, the boryl group and amino group are incorporated at the β position and α position, respectively, and the corresponding β‐boryl‐α‐aminosilanes are obtained with good diastereoselectivity. The boryl group is a good latent functional group, and subsequent manipulations provide a variety of β‐functionalized α‐aminosilanes of great potential in medicinal chemistry. Additionally, preliminary application to asymmetric catalysis is also described.
Highly efficient and green oxidation of alkanes and alkylaromatics with hydrogen peroxide catalysed by silver and vanadyl on mesoporous silica‐coated magnetite
Authors: Nouri Seyed Hadi , Hosseini‐Monfared Hassan 
Published: October 2016

A heterogeneous catalyst (FeSi/Ag/VO) based on silver and vanadyl as active sites and mesoporous silica‐coated nanospheres of magnetite (Fe3O4@m‐SiO2) as support was successfully prepared by deposition of Ag nanoparticles and the covalent grafting of vanadyl(IV) acetylacetonate on Fe3O4@m‐SiO2. The catalyst exhibited excellent activity for the oxidation of alkanes, benzene and alkylaromatics using green oxidant H2O2 and oxalic acid in acetonitrile at 60 °C.
Polyurethanes based on isophorone diisocyanate trimer and polypropylene glycol crosslinked by thermal reversible diels alder reactions
Authors: Irusta Lourdes , Fernández‐Berridi Ma José , Aizpurua June 
Published: October 2016

ABSTRACTCrosslinked self‐healing polyurethanes based on Diels–Alder (DA) reaction were synthesized from a trifunctionalized isophorone diisocyanate (IPDI) and polypropyleneglycol prepolymer with furfuryl alcohol and a commercial bismaleimide. The DA reaction was followed by FTIR spectroscopy at different temperatures. From the infrared results the kinetic rate constants as well as the DA reaction reversibility were established. The retro DA reaction (rDA) and its reversibility was monitored by DSC according to the enthalpy involved in the process. The obtained polymers exhibited thermosetting properties at room temperature, although they showed thermoplastic behavior at high temperatures. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44543.
Modeling and Control Approach to Coupled Tanks Liquid Level System Based on Function‐Type Weight RBF‐ARX Model
Authors: Zhou Feng , Peng Hui , Zeng Xiaoyong , Tian Xiaoying , Wu Jun 
Published: October 2016

AbstractA multi‐input multi‐output (MIMO) FWRBF‐ARX model, which adopts radial basis function (RBF) neural networks with function‐type weights (FWRBF) to approximate the coefficients of the state‐dependent AutoRegressive model with eXogenous input variables (SD‐ARX), is utilized for describing the dynamics of a coupled tanks liquid system. Based on local linearization information of the MIMO FWRBF‐ARX model, a predictive control strategy is proposed. In the algorithm, the control actions of the model predictive control (MPC) are calculated based on the local linearization of the MIMO FWRBF‐ARX model at current working point. Real‐time control experiments are carried out on the coupled tanks liquid system. The detailed comparative experiments demonstrate the feasibility and effectiveness of the proposed modeling and model‐based control strategy for the coupled tanks plant.
Screening through the PLICable promoter toolbox enhances protein production in Escherichia coli
Authors: Yang Jianhua , Ruff Anna Joëlle , Hamer Stefanie Nicole , Cheng Feng , Schwaneberg Ulrich 
Published: October 2016

AbstractEscherichia coli is a common host for recombinant protein production in which production titers are highly dependent on the employed expression system. Promoters are thereby a key element to control gene expression levels. In this study, a novel PLICable promoter toolbox was developed which enables in a single cloning step and after a screening experiment to identify out of ten IPTG‐inducible promoters (T7, A3, lpp, tac, pac, Sp6, lac, npr, trc and syn) the most suitable one for high level protein production. The target gene is cloned under the control of different promoters in a single and efficient cloning step using the ligase‐free cloning method PLICing (phosphorothioate‐based ligase‐independent gene cloning). The promoter toolbox was firstly validated using three well producible proteins (a cellulase from a metagenome library, a phytase from Yersinia mollaretii and an alcohol dehydrogenase from Pseudomonas putida) and then applied to two enzymes (3D1 DNA polymerase and glutamate dehydrogenase mutant) which are poorly produced in E. coli. By applying our PLICable pET‐promoter toolbox, the authors were able to increase production by two‐fold for 3D1 DNA polymerase (lac promoter) and 29‐fold for glutamate dehydrogenase mutant H52Y (trc promoter).