bluuebunny/crossref_metadata_2025_split huggingface dataset:
Computational Tool Development for Weld Sequence Planning in Major Assemblies
Authors: Fisher Charles R. , Denault Lori L. , Rhodes Shawn , Finley Jonathan , Gooroochurn Yogendra 
Published: January 2019

For the U.S. Navy, the use of computational simulations is prevalent for structural finite-element analysis but not for shop floor fabrication during construction. However, prevention and mitigation of welding-induced deformation creates a significant manufacturing challenge during fabrication of major ship assemblies, especially for thin-plate steel construction. The objective of this project was to improve weld sequence planning (WSP) capabilities for major ship assemblies through the development of a quick and user-friendly WSP software tool. An approximately 5× reduction in analysis time (from model setup through solve time) was realized through process automation, development of a weld joint database, and two-step weld sequence optimization algorithms. Physical testing of tank-like structures validated the computational tool, which established high correlation between measured and predicted distortion results. Sequence optimization analysis for an eggcrate structure showed a 43% reduction in maximum distortion from the two-step optimization process within the WSP tool. The end goal of this program is improved confidence in, and use of, computational weld mechanics techniques to more cost-effectively serve the U.S. Navy enterprise.

1. Introduction
Within shipbuilding, the construction of major ship assemblies (e.g., foundation tanks, bulkheads, and deck plating) can result in significant welding-induced deformation, especially in thin-plate steel construction (Spraragen & Ettinger 1950). Prevention and mitigation of this distortion typically creates a significant manufacturing challenge to the fabrication shop floor in terms of impact to cost and schedule. In addition, the skilled trades do not typically have weld sequence and clamping plans for major structures, instead relying on trade knowledge (i.e., prior experience paired with trial and error) with limited documentation across successive (but corollary) builds.
A more rigorous approach using computational weld mechanics (CWM) techniques would involve finite-element analysis (FEA) of the welded component. CWM techniques enable better documentation (possessing a digital component) and sequence optimization for distortion reduction. However, current FEA tools using a transient heat source model and an implicit solver require days, weeks, or even months to prepare the computational model, run the simulation, and analyze the results for major ship assemblies because of their size relative to the size of weld beads. This lengthy calculation time is not feasible for use in a shipyard environment. In addition, the users of the transient heat source FEA tools are typically highly trained, with PhD.-level experience in computational simulation, and are not typically found on the production floor of most shipyards.
Profesor y alumnado conectados en una red pública compartida
Authors: García Gómez Teresa , Carmona Fernández Juan José 
Published: January 2019

El presente trabajo analiza el modo en el que el uso de las TIC y medios digitales impulsan la creación de participación ciudadana en el aula; siendo el profesor el vehículo que guía estos procesos de enseñanza y aprendizaje. La metodología utilizada es de corte cualitativo, concretamente una investigación con Estudio de Caso en un aula de secundaria, en la que se ha indagado en qué medida el uso de las herramientas web 2.0 incentivan la construcción de ciudadanía. Como resultados destacan una ruptura con el estilo docente «tradicional», creándose una Red de redes donde usa Facebook, Twitter, Google Plus de manera activa e interconexionada entre sí, potenciando una formación en y para la ciudadanía a través de un propuesta didáctica para el ejercicio de la autonomía, donde la competencia digital y la competencia social y ciudadana están íntimamente interrelacionadas. En conclusión, la participación democrática y la colaboración entre iguales, unido al desarrollo de ambas competencias, fomentan un estilo de ciudadanía activa.
This paper discusses how ICT and digital media can promote involvement in civil society, with teachers being the vehicle for these educational and learning processes. Through a qualitative approach focused on a case study of a secondary school classroom, it shows to what extent the use of Web 2.0 tools encourage the building of citizenship. The most significant results show a break with "traditional" teaching through a complex network system, including active and connected uses of Facebook, Twitter and Google Plus to promote the learning of citizenship through a teaching method aimed at exercising autonomous behaviour where digital and social capacities are deeply intertwined. To conclude, citizen involvement and peer to peer cooperation, as well as the development of both capacities, promote an active-style citizenship.
Determinantes del rendimiento académico en los estudiantes de grado. Un estudio en administración y dirección de empresas
Authors: Tomás-Miquel José-Vicente , Expósito-Langa Manuel , Sempere-Castelló Saúl 
Published: January 2019

El Plan Bolonia ha favorecido la puesta en marcha de nuevas metodologías en el aula que influyen sobre los alumnos, por lo que nuevos factores pueden desempeñar un papel relevante para explicar su rendimiento académico. El objetivo de este trabajo es analizar la influencia de un rango de factores sobre el rendimiento, comparando estos resultados con contribuciones anteriores. A partir de un estudio en alumnos del Grado de Administración y Dirección de Empresas, los resultados confirman la existencia de factores en línea con trabajos anteriores. Sin embargo, otros factores como la organización y planificación personal, o la participación en programas de integración, toman mayor influencia que en el pasado. Por tanto, consideramos que las universidades deberían incidir en la formación de competencias de organización y hábitos de estudio, así como en el fomento de planes de acción tutorial para contribuir a la mejora del rendimiento académico de los alumnos.
The Bologna Process has led to the implementation of new methodologies at university that may influence students in such a way that new factors may play a relevant role in explaining academic performance. The aim of this paper is to analyse the influence of a range of factors on students’ performance by comparing results with previous contributions. The study focused on management and business administration students. Results confirm the existence of factors in line with previous studies. However, other factors such as personal organization and planning, or participation in integration programs have a greater influence than in the past. We therefore believe that universities should place more emphasis on training organizational skills and study habits, as well as on promoting tutorial action plans to help improve students’ academic performance.
El análisis de las tesis doctorales como indicador evaluativo: reflexiones y propuestas
Authors: Jiménez-Contreras Evaristo , Ruiz-Pérez Rafael , Delgado López-Cózar Emilio 
Published: January 2019

Se reflexiona sobre el significado de las tesis doctorales desde el punto de vista de sus posibilidades como fuente e indicador para analizar la investigación, sobre como su estudio puede ser empleado para conocer el estado de la investigación, hasta donde es posible y qué indicadores se están utilizando o se pueden proponer para cuantificarla. Dicho análisis presenta varias facetas: como indicador de las tendencias en la investigación; como indicador de la capacidad y potencial para educar a investigadores; como medio para identificar la producción y difusión de resultados de investigación de alto nivel; y finalmente como instrumento para conocer la estructura social de la universidad (genealogías, redes científicas, sistemas de poder).
This paper presents a number of reflections on the extent to which doctoral theses may be considered research indicators, what theses can tell us about the status of research, and which indicators are being used or may be used. The analysis in this paper covers various points: theses as an indicator of trends in research; as an indicator of the potential to train researchers; as a means to identify the production and dissemination of high standard research results; and finally, as an instrument to learn about the social structure in tertiary teaching (genealogies, scientific networks, power systems).
Análisis psicométrico y relaciones de diagnóstico de la inteligencia emocional y liderazgo en docentes de enseñanzas regladas
Authors: Báez Mirón Federico , Zurita Ortega Felix , Martinez Martinez Asuncion , Zagalaz Sanchez María Luisa 
Published: January 2019

La inteligencia emocional y el liderazgo son dos elementos básicos en las competencias y habilidades de los docentes. En este estudio que tiene como objetivos comprobar las propiedades psicométricas de TMSS-24 y MLQ-5X en docentes, describir la competencia de inteligencia emocional y de liderazgo de éstos, y establecer las relaciones de éstas con el tipo de enseñanza que se imparte. Para ello se analizaron a 160 docentes de toda España de 137 centros educativos, a los cuales les fue administrado los instrumentos anteriormente mencionados. Se debe indicar como principales resultados el excelente ajuste de estos instrumentos así como su fiabilidad siendo adecuadas para el conjunto de docentes de enseñanzas regladas. Dentro del marco de la inteligencia emocional se debe señalar que la regulación y comprensión son las más valoradas y en cuanto al liderazgo los de tipos transformacionales, transaccionales y resultados de liderazgo presentan cifras muy similares. En el ámbito de las relaciones solamente se encontró asociación entre el liderazgo transformacional y el tipo de enseñanza impartida hallándose una mayor capacidad de cambio en el contexto universitario, mientras que en primaria y ciclos formativos la transformación no es tan importante.
Emotional intelligence and leadership are two basic elements in the competences and abilities of teachers. In this study, which aims to verify the psychometric properties of TMSS-24 and MLQ-5X in teachers, describe the competence of emotional intelligence and leadership of these, and establish the relationships of these with the type of teaching that is taught. To this end, 160 teachers from all over Spain were analyzed from 137 educational centers, to which the aforementioned instruments were administered. It should be indicated as the main results the excellent adjustment of these instruments as well as their reliability being fully adequate for the group of teachers of regulated education. Within the framework of emotional intelligence should be noted that regulation and understanding are the most valued and in terms of leadership transformational types, transactional and leadership results have very similar figures. In the field of relationships, only an association was found between the transformational leadership and the type of education given, with a greater capacity for change in the university context, while in primary and vocational training the transformation is not so important.
A PEDAGOGIA HISTÓRICO-CRÍTICA E O CURRÍCULO BÁSICO PARA A ESCOLA PÚBLICA DO PARANÁ – 1990: DO MITO À REALIDADE
Authors: Orso Paulino José , Tonidandel Sandra 
Published: January 2019

<div class="column"><p><span style="font-size: 11.000000pt; font-family: 'Garamond';">Há praticamente um consenso de que, no Estado do Paraná, a Pedagogia Histórico-Crítica (PHC) foi institucionalizada e se constitui no referencial pedagógico que embasa toda a prática pedagógica da Rede estadual de ensino desde de 1990. O objetivo deste artigo, porém, é demonstrar que, apesar das melhorias conquistadas pelo movimento dos educadores, como a hora atividade, a eleição de diretores e a </span><span style="font-size: 11.000000pt; font-family: 'Garamond';">melhoria na questão salarial, dentre outras, não só não se “institucionalizou” um Currículo calcado na </span><span style="font-size: 11.000000pt; font-family: 'Garamond';">PHC, como permanece desconhecida pela maioria dos docentes, apesar de estar no PPP das escolas e no discurso vazio da maioria dos docentes e políticos</span><span style="font-family: Garamond; font-size: 11pt;">. </span></p></div>
A CHAMADA ACUMULAÇÃO ORIGINAL
Authors: Marx Karl 
Published: January 2019

<div class="page" title="Page 1"><div class="layoutArea"><div class="column"><p><span style="font-size: 11.000000pt; font-family: 'Garamond';">Viu-se como o dinheiro é transformado em capital, como por meio do capital se faz mais-valia e da mais-valia se faz mais capital. Entretanto a acumulação do capital pressupõe a mais-valia, a mais-valia a produção capitalista, esta porém, a existência de massas maiores de capital e força de trabalho, nas mãos de produtores de mercadorias. Todo este movimento parece, portanto, girar num círculo vicioso, do qual só saímos subpondo </span><span style="font-size: 11.000000pt; font-family: 'Garamond,Italic';">[unterstellen] </span><span style="font-size: 11.000000pt; font-family: 'Garamond';">uma acumulação “original” </span><span style="font-size: 11.000000pt; font-family: 'Garamond,Italic';">(“previous accumulation”</span><span style="font-size: 7.000000pt; font-family: 'Garamond'; vertical-align: 3.000000pt;">2 </span><span style="font-size: 11.000000pt; font-family: 'Garamond';">em Adam Smith) anterior à acumulação capitalista, uma acumulação que não é o resultado do modo de produção capitalista, mas o seu ponto de partida. </span></p></div></div></div>
Assessing the quality of child investigative interviewing in the Netherlands
Authors: Otgaar Henry , La Rooy David , Horselenberg Robert , Hershkowitz Irit , de Ruiter Corine , Blezer Laura , Kidane Rosie , Kollau Rowan 
Published: January 2019

SummaryUsing evidence‐based guidelines to interview children is an important means to obtain complete and accurate accounts. In the current study, we examined the quality of child investigative interviewing in the Netherlands. To examine this, we compared the Dutch Scenario Model with the National Institute of Child Health and Human Development Protocol and interviews from countries that did not follow a specific protocol. Our principal result was that Dutch child interviewers rarely asked recommended open prompts that are known to elicit detailed and accurate testimonies from children. Furthermore, we found that the scenario model contained the highest number of directive questions compared with interviews from other countries. Our findings show that the Dutch Scenario Model is not well aligned with current research‐based recommendations for interviewing children.
Blue Light Switchable Cell–Cell Interactions Provide Reversible and Spatiotemporal Control Towards Bottom‐Up Tissue Engineering
Authors: Yüz Simge G. , Rasoulinejad Samaneh , Mueller Marc , Wegner Anatol E. , Wegner Seraphine V. 
Published: January 2019

AbstractControlling cell–cell interactions is central for understanding key cellular processes and bottom‐up tissue assembly from single cells. The challenge is to control cell–cell interactions dynamically and reversibly with high spatiotemporal precision noninvasively and sustainably. In this study, cell–cell interactions are controlled with visible light using an optogenetic approach by expressing the blue light switchable proteins CRY2 or CIBN on the surfaces of cells. CRY2 and CIBN expressing cells form specific heterophilic interactions under blue light providing precise control in space and time. Further, these interactions are reversible in the dark and can be repeatedly and dynamically switched on and off. Unlike previous approaches, these genetically encoded proteins allow for long‐term expression of the interaction domains and respond to nontoxic low intensity blue light. In addition, these interactions are suitable to assemble cells into 3D multicellular architectures. Overall, this approach captures the dynamic and reversible nature of cell–cell interactions and controls them noninvasively and sustainably both in space and time. This provides a new way of studying cell–cell interactions and assembling cellular building blocks into tissues with unmatched flexibility.
Monolayer Epitaxial Heterostructures for Selective Visible‐Light‐Driven Photocatalytic NO Oxidation
Authors: Wang Liang , Xu Kang , Cui Wen , Lv Dongdong , Wang Li , Ren Long , Xu Xun , Dong Fan , Dou Shi Xue , Hao Weichang , Du Yi 
Published: January 2019

AbstractConstruction of vertical heterostructures by stacking two‐dimensional (2D) layered materials via chemical bonds can be an effective strategy to explore advanced solar‐energy‐conversion systems. However, it remains a great challenge to fabricate such heterostructures based on conversional oxide‐based compounds, as they either do not possess a 2D layered structure or are not suitable for epitaxial growth due to large lattice mismatch. Here, a vertical heterostructure of bismuth oxyhalide semiconductors fabricated through a heteroepitaxial anion exchange method is reported. Monolayer Bi2WO6 is epitaxially grown on the exposed surface of BiOI to inhibit photocorrosion and introduce active sites. Theoretical and experimental results reveal that electrons generated under visible‐light irradiation can directly transfer to surface coordinatively unsaturated (CUS) Bi atoms, which contribute to the adsorption and activation of reactant molecules. As a result, the Bi2WO6/BiOI vertical heterostructures exhibit significantly enhanced visible‐light‐driven NO oxidation activity compared with BiOI and Bi2WO6.
Fluorobenzotriazole (FTAZ)‐Based Polymer Donor Enables Organic Solar Cells Exceeding 12% Efficiency
Authors: Liao Zhihui , Xie Yuanpeng , Chen Lie , Tan Yun , Huang Shaorong , An Yongkang , Ryu Hwa Sook , Meng Xiangchuan , Liao Xunfan , Huang Bin , Xie Qian , Woo Han Young , Sun Yanming , Chen Yiwang 
Published: January 2019

AbstractThe fluorobenzotriazole (FTAZ)‐based copolymer donors are promising candidates for nonfullerene polymer solar cells (PSCs), but suffer from relatively low photovoltaic performance due to their unsuitable energy levels and unfavorable morphology. Herein, three polymer donors, L24, L68, and L810, based on a chlorinated‐thienyl benzodithiophene (BDT‐2Cl) unit and FTAZ with different branched alkyl side chain, are synthesized. Incorporation of a chlorine (Cl) atom into the BDT unit is found to distinctly optimize the molecular planarity, energy levels, and improve the polymerization activity. Impressively, subtle side chain length of FTAZ realizes a dramatic improvement in all the device parameters, as revealed by the short‐current density (Jsc) improved from 7.41 to 20.76 mA cm−2, fill‐factor from 36.3 to 73.5%, and even the open‐circuit voltage (Voc) from 0.495 to 0.790 V. The best power conversion efficiency (PCE) of 12.1% is obtained from the L810‐based device, which is one of the highest values reported for FTAZ‐based PSCs so far. Notably, the corresponding external quantum efficiency curve keeps a very prominent value up to 80% from 500 to 800 nm. The notable performance is discovered from the reduced energy loss, improved molecular face‐on orientation, the down‐shifted energy levels, and optimized absorption coefficient regulated by side‐chain engineering.
Chiral Grayscale Imaging with Plasmonic Metasurfaces of Stepped Nanoapertures
Authors: Chen Yang , Gao Jie , Yang Xiaodong 
Published: January 2019

AbstractOptical chiral imaging, as an important tool in chemical and biological analysis, has recently undergone a revolution with the development of chiral metamaterials and metasurfaces. However, the existing chiral imaging approaches based on metamaterials or metasurfaces can only display binary images with 1 bit pixel depth having either black or white pixels. Here, the unique chiral grayscale imaging based on plasmonic metasurfaces of stepped V‐shaped nanoapertures is reported with both high circular dichroism and large polarization linearity in transmission. By interlacing two subarrays of chiral nanoaperture enantiomers into one metasurface, two specific linear polarization profiles are independently generated in transmission under different incident handedness, which can then be converted into two distinct intensity profiles for demonstrating spin‐controlled grayscale images with 8 bit pixel depth. The proposed chiral grayscale imaging approach with subwavelength spatial resolution and high data density provides a versatile platform for many future applications in image encryption and decryption, dynamic display, advanced chiroptical sensing, and optical information processing.
Matrix Topography Regulates Synaptic Transmission at the Neuromuscular Junction
Authors: Ko Eunkyung , Yu Seung Jung , Pagan‐Diaz Gelson J. , Mahmassani Ziad , Boppart Marni D. , Im Sung Gap , Bashir Rashid , Kong Hyunjoon 
Published: January 2019

AbstractRecreation of a muscle that can be controlled by the nervous system would provide a major breakthrough for treatments of injury and diseases. However, the underlying basis of how neuron–muscle interfaces are formed is still not understood sufficiently. Here, it is hypothesized that substrate topography regulates neural innervation and synaptic transmission by mediating the cross‐talk between neurons and muscles. This hypothesis is examined by differentiating neural stem cells on the myotubes, formed on the substrate with controlled groove width. The substrate with the groove width of 1600 nm, a similar size to the myofibril diameter, serves to produce larger and aligned myotubes than the flat substrate. The myotubes formed on the grooved substrate display increases in the acetylcholine receptor expression. Reciprocally, motor neuron progenitor cells differentiated from neural stem cells innervate the larger and aligned myotubes more actively than randomly oriented myotubes. As a consequence, mature and aligned myotubes respond to glutamate (i.e., an excitatory neurotransmitter) and curare (i.e., a neuromuscular antagonist) more rapidly and homogeneously than randomly oriented myotubes. The results of this study will be broadly useful for improving the quality of engineered muscle used in a series of applications including drug screening, regeneration therapies, and biological machinery assembly.
Dopant‐Free Partial Rear Contacts Enabling 23% Silicon Solar Cells
Authors: Bullock James , Wan Yimao , Hettick Mark , Zhaoran Xu , Phang Sieu Pheng , Yan Di , Wang Hanchen , Ji Wenbo , Samundsett Chris , Hameiri Ziv , Macdonald Daniel , Cuevas Andres , Javey Ali 
Published: January 2019

AbstractOver the past five years, there has been a significant increase in both the intensity of research and the performance of crystalline silicon devices which utilize metal compounds to form carrier‐selective heterocontacts. Such heterocontacts are less fundamentally limited and have the potential for lower costs compared to the current industry dominating heavily doped, directly metalized contacts. A low temperature (≤230 °C), TiOx/LiFx/Al electron heterocontact is presented here, which achieves mΩcm2 scale contact resistivities ρc on lowly doped n‐type substrates. As an extreme demonstration of the potential of this heterocontact, it is trialed in a newly developed, high efficiency n‐type solar cell architecture as a partial rear contact (PRC). Despite only contacting ≈1% of the rear surface area, an efficiency of greater than 23% is achieved, setting a new benchmark for n‐type solar cells featuring undoped PRCs and confirming the unusually low ρc of the TiOx/LiFx/Al contact. Finally, in contrast to previous versions of the n‐type undoped PRC cell, the performance of this cell is maintained after annealing at 350–400 °C, suggesting its compatibility with conventional surface passivation activation and sintering steps.