bluuebunny/crossref_metadata_2025_split huggingface dataset:
Realistic Stacking Sequence Optimisation of an Aero-Engine Fan Blade-Like Structure Subjected to Frequency, Deformation and Manufacturing Constraints
Authors: Canale Giacomo , Andrews Stuart , Rubino Felice , Maligno Angelo , Citarella Roberto , Weaver Paul M. 
Published: June 2018

Aims:A procedure to optimise the stacking sequence of a composite fan blade-like structure is proposed in this article. The aim of the optimisation is to minimise weight when respecting deformation, frequency and strain constraints. The literature often deals with stacking sequence optimisation of airplane wings or wind turbine blades whilst less attention has been dedicated to aero-engines fan blades, the objective of the present paper. The manufacturing constraints are also implemented in the optimisation process in order to obtain a manufacturable structure.Background:Stacking sequence of composite laminates can be tailored to drive the deformation towards the desired shape (potentially exploiting unbalanced laminates and their anisotropy). When optimising the stacking sequence (including blending/tapering) of an aero-engine fan blade-like structure, manufacturing constraints must be included in order to apply the results of the optimisation procedure into a “Real World” design.Objectives:To define an engineering procedure able to provide a good design point to minimise the weight of a fan blade-like structure subjected to deformation (tip extension and untwist), frequency and strain constraints.Methods:A two-level optimisation procedure is proposed. At the first level, the stacking sequence is optimised in such a way to maximise stiffness (and therefore to minimise deformation). Less stringent limits are applied to the constraints of such a level 1 optimisation. In the second step of the optimisation, the blending/tapering of each ply of the stacking sequence is searched.Results:The fan blade-like structure is loaded only with a centrifugal load (the main load acting on this kind of components). The stacking sequence obtained to minimise the weight contains 42.3% of 0 degrees fibres, 19.25% of 45 degrees fibres, 19.25% of -45 degrees fibres and 19.2% of 90 degrees fibres. Blending in terms of width and length of each layer is given in the numerical results section.Conclusions:When the fan blade-like structure is loaded with a centrifugal force only, in order to minimise weight by respecting untwist, tip extension, frequency and integrity constraints, no unbalance in the laminate has been found necessary. An “Optimum” point has been found after a two steps optimisation. This design point is claimed as a good industrial design point rather than as “optimum” in the mathematical sense. Such a “Best Solution” design point has been verified by exploring the design space near it. All the performance of the neighbour points has been found worse. A comparison between a quasi-isotropic laminate and a zero degreed dominated laminate has been also performed.
Aprender la historia: de las operaciones infralógicas al pensamiento formal
Authors: Morales Peláez Mayarí , Vega Molina Luis Diego , Zárate Arguedas Nelson 
Published: June 2018

El artículo se fundamenta en una exploración epistemológica con jóvenes entre 12 y 14 años, con un énfasis en el paso de las operaciones infralógicas al pensamiento formal.En él se muestran experiencias operatorias que cumplen funciones de diagnóstico, pero también de aprendizaje y se evidencia la necesidad del desarrollo de experiencias de aula focalizadas en la asimilación nocional para la comprensión de la historia.
El museo local como herramienta de difusión y didáctica del patrimonio arqueológico. Algunas reflexiones en torno al caso español
Authors: Garrido Castellano Carlos 
Published: June 2018

Este artículo analiza el estado actual de la museología arqueológica en ámbitos municipales en lo que a España respecta. Partiendo de un enfoque amplio, que combina avances en la teoría arqueológica sobre la musealización y la difusión del patrimonio con los presupuestos de la Didáctica de la Arqueología, se pretende realizar una valoración crítica de algunas de las propuestas de intervención patrimonial másnovedosas, así como reflexionar acerca de la problemática actual de los centros museísticos locales.
Estrategias para la innovación e implementación de las Tecnologías de la Información y la Comunicación en la práctica educativa: una respuesta a las nuevas demandas de la sociedad del siglo XXI
Authors: Quesada Fernández Cristian 
Published: June 2018

Actualmente la sociedad demanda en la formación de las personas una serie de competencias que van desde el uso de las Tecnologías de la Información y la Comunicación hasta habilidades de trabajo cooperativo, toma de decisiones, pensamiento crítico y resolución de problemas. En este artículo se resumen las principales demandas de la sociedad al docente, estudiante y a las instituciones educativas, además se expone la implementación de las Tecnologías de la Información y la comunicación (TIC) y la educación virtual como una opción para hacerle frente a dichas demandas. Palabras clave: educación en línea, educación virtual, Tecnologías de la Información y Comunicación
Creencias sobre la clase, y el docente de matemáticas en la educación secundaria
Authors: Rojas Mora Eugenio , Sequeira Salaza Ronald 
Published: June 2018

Existen muchas opiniones por parte de estudiantes de secundaria sobre la clase y el docente de matemáticas, algunas positivas y otras no. Por ejemplo, para algunos las lecciones de matemáticas son aburridas, y muy difíciles. Para otros, las clases son interesantes y entretenidas. Con respecto al docente de Matemática, es aburrido, poco innovador, hábil con los números y responsable. En este artículo se describen algunas de las creencias que tienen los estudiantes sobre las clases y el docente de Matemática, como parte del Proyecto de Investigación: “Estructura de las Creencias en Matemática”, con estudiantes de secundaria de tres instituciones de Costa Rica, dos decarácter público y una de carácter privado.
Producción de melón en invernadero: comparación agronómica entre tipos de melón
Authors: Monge-Pérez José Eladio , Loría-Coto Michelle 
Published: June 2018

En esta investigación, se evaluaron siete tipos de melón (Cucumis melo L.): el amarillo, el cantaloupe, el charentais, el galia, el harper, el honey dew y el japonés, producidos bajo invernadero en condiciones hidropónicas en Alajuela, Costa Rica, para determinar su rendimiento y calidad, en los niveles cualitativo (una variable) y cuantitativo (seis variables). Todos los genotipos de los melones tipo amarillo, honey dew y japonés presentaron plantas andromonoicas, mientras que, en los demás tipos, se presentaron genotipos monoicos y andromonoicos. Los datos muestran una amplia variabilidad entre los tipos de melón en cuanto a número de frutos por planta (1,18–3,26); peso promedio del fruto (443,29–837,03 g); rendimiento por planta (685,08–1882,13 g); rendimiento por área (17,79–48,89 ton/ha); firmeza de la pulpa del fruto (14,91–20,40 N); y porcentaje de sólidos solubles totales (12,48–15,33 °Bx). El mayor número de frutos por planta se obtuvo en los tipos de melón amarillo (3,26) y japonés (2,79); mientras que el menor número, con cantaloupe (1,48) y galia (1,18). Los frutos con mayor peso promedio se consiguieron con los tipos honey dew, cantaloupe y japonés. No se presentaron diferencias significativas entre tratamientos para la firmeza de la pulpa del fruto. El mayor porcentaje de sólidos solubles totales se obtuvo con los melones tipo honey dew, amarillo, harper y japonés. El mayor rendimiento por área se logró con los melones tipo japonés y honey dew (48,89 y 47,51 ton/ha, respectivamente), por lo que se consideran los más recomendables bajo las condiciones en que se desarrolló el ensayo.
Metodologías inclusivas de aprendizaje mediante el uso de TIC: opiniones de estudiantes y docentes costarricenses
Authors: Carolina Ávalos Dávila Carolina , Redondo Quesada Vivian , Rojas Camacho Daiyen , Salazar Marín Jéssica 
Published: June 2018

La presente investigación tiene como objetivo realizar un análisis comparativo de tres centros educativos, dos públicos y uno privado: el centro educativo Juan Flores Umaña, el CTP Fernando Volio y el centro educativo bilingüe Llama del Bosque respectivamente, con la finalidad de indagar sobre el uso de las diversas TIC usadas, en los procesos de enseñanza-aprendizaje en las áreas de ciencias e inglés, y valorar si tal uso apunta a la ejecución de metodologías de enseñanza y aprendizaje favorecedoras de una educación integral y de atención a la diversidad estudiantil en la población de sexto y de sétimo grado; para ello, se tomaron en cuenta sus similitudes, diferencias y formas de aprendizaje. La investigación de tipo mixto, exploratoria, descriptiva, fundamentada en el paradigma crítico y positivista, presenta los resultados, las opiniones de los docentes y estudiantes en cuanto al empleo de metodologías, técnicas y recursos TIC, en favor de generar espacios inclusivos de aprendizaje. Finalmente, se sensibiliza al cuerpo docente en el tema de inclusión educativa desde la capacitación de métodos que favorezcan procesos de aprendizaje integrales e inclusivos, como lo podría ser el método sobre Diseño Universal (DUA), favorecedor de metodologías de aprendizaje que, apoyadas por variados recursos tecnológicos, propicien una educación integral, innovadora y diversa.
Real Earnings Management by Benchmark-Beating Firms: Implications for Future Profitability
Authors: Beyer Brooke D. , Nabar Sandeep M. , Rapley Eric T. 
Published: June 2018

SYNOPSIS
Prior studies document both an improvement (Gunny 2010) and deterioration (Bhojraj, Hribar, Picconi, and McInnis 2009) in the future operating performance of firms engaging in real earnings management (REM) to meet earnings benchmarks. These results suggest that some firms use REM to signal their favorable prospects, whereas others use REM opportunistically. We hypothesize that firms with less robust information environments, more costly REM, and fewer incentives to meet short-term earnings benchmarks are more likely to engage in REM to signal future performance. Consistent with expectations, we find the positive relation between REM and future profitability is limited to firms that have less robust information environments (measured with stock return volatility, bid/ask spread, and analysts following), more costly REM (measured with market share and financial health), and fewer incentives to meet short-term earnings benchmarks (measured with market-to-book ratio, transient investors, and seasoned equity offering). In supplementary analysis, we note that Bhojraj et al. (2009) restrict their sample to relatively large firms, whereas Gunny's (2010) sample includes both large and small firms. Our analysis indicates that the difference in sample composition explains the differing results. We find that small firms use REM to signal positive future performance, but large firms do not.
JEL Classifications: M40; M41.
Lithofacies And Depositional Analysis Environment Of West Section Kolok Nan Tuo Village, Sawahlunto City, West Of Sumatera
Authors: Cahyaningsih Catur , Ritonga Anjas Latif , Aldila Shaury , Zulhikmah Zulhikmah 
Published: June 2018

Research areas were located in the west of Kolok Nan Tuo Village. Geographically this area is located at coordinates 00 ° 36'57,85 '' - 00 ° 37'56,89 '' latitude and 100 ° 42'10,08 '' 100 ° 43'47,28 " BT. The methods used in research is geological mapping. Based on the results of stratigraphic research area is divided into three units consist of: Crystalline Limestone Unit (SBGK) consisting Crystalline Limestone of and mudstone lithofacies, Conglomerate Units (SK) consists of polymic conglomerate and sandstones greywacke lithofacies while claystone Unit (SBL) lithofacies consists of claystone with sedimentary structures is flake. Result of research can interpreted Depositional environment based on type of lithofacies include of grain size, sedimentary structures and content of fossils. SBGK interpretated depositional environment is a basement of basin, SK depositional environment debris unit limestones can be seen from fragments of conglomerates that many there are crystalline limestones and mudstone that make up the alluvial fan (deposition surface) and lithologies clay from sedimentary structures where rock mudstone generally in doposition the current flow that quiet can form sedimentary structures flake and properties of claystone which carbonated an identifier depositional environments sea so can be determined that the environment in the form of neritic environment.
European Union and Challenges of Cultural Policies: Critical Perspectives. An Introduction
Authors: Primorac Jaka , Uzelac Aleksandra , Bilić Paško 
Published: June 2018

Abstract
This introductory article contextually frames the contributions to the special issue gathering articles critically addressing the key questions and challenges that the European Union (EU) and national cultural policies are facing in the 21st century. Interdisciplinary contributions in this special issue point to the diverse understandings of culture, the complexity of the EU governance system, and the discrepancy and mismatch of the national and EU levels that regulate the field of culture. The authors detect the inconsistent development strategies on different policy levels, and point to the democratic deficits of the EU governance system and EU policies. Selected contributions address a further focal shift of EU culture policies toward an economistic orientation to culture, while others address the need for a more critical approach that moves beyond predominantly positivistic and normative approaches to cultural policy research in Europe.
Camouflaged Culture: The ‘Discursive Journey’ of the EU’s Cultural Programmes
Authors: Valtysson Bjarki 
Published: June 2018

Abstract
This article inspects discursive shifts in the EU’s cultural policy and how these relate to the four ‘generations’ of EU cultural programmes: Raphaël, Ariane, Kaleidoscope; Culture 2000; Culture 2007; and the current Creative Europe programme. This paper therefore accounts for a ‘discursive journey’ that started in the 1970s and culminated with Article 128 in the Maastricht Treaty, which formally constituted the EU’s cultural policy. The article reveals that there can be detected certain shifts in discourses concerning the EU’s cultural programmes, but these shifts are aligned to older discourses within the cultural sector which, prior to the Maastricht Treaty, applied implicit cultural interventions. These therefore represented ‘camouflaged’ cultural understanding and appliances, which were instrumental and promoted economically and politically induced discourses. The major shift detected in the recent Creative Europe programme is a step away from discourses that facilitate the political construction of a ‘people’s Europe’, thereby utilising further discourses that promote aims which adhere to the Union’s Europe 2020 Strategy for smart, sustainable and inclusive growth.
Air passengers forecasting for Australian airline based on hybrid rough set approach
Authors: Sharma H. Kumar , Kumari K. , Kar S. 
Published: June 2018

Abstract
Accurate and reliable air passenger demand is very important for policy-making and planning by tourism management as well as by airline authorities. Therefore, this article proposed a novel hybrid method based on rough set theory (RST) to construct decision rules for long-term forecasting of air passengers. Level (mean) and trend components are first estimated from the air passengers time series data using DES model in the formulation of the proposed hybrid method. Then the rough set theory is employed to combine the output of DES model and generated decision rules is used to forecasting air passengers. We compare the proposed approach with other time series models using a corrected classified accuracy (CCA) criterion. For the empirical analysis, yearly air transport passenger from 1992 to 2004 is used. Empirical results show that the proposed method is highly accurate with the higher corrected classified accuracy. Also, forecasting accuracy of the proposed method is better than the other time series approaches.
Estimation Methods for a Flexible INAR(1) COM-Poisson Time Series Model
Authors: Sunecher Y. , Khan N. Mamode , Jowaheer V. 
Published: June 2018

Abstract
Time series of counts occur in many real-life situations where they exhibit various forms of dispersion. To facilitate the modeling of such time series, this paper introduces a flexible first-order integer-valued non-stationary autoregressive (INAR(1)) process where the innovation terms follow a Conway-Maxwell Poisson distribution (COM-Poisson). To estimate the unknown parameters in this model, different estimation approaches based on likelihood and quasi-likelihood formulations are considered. From simulation experiments and a real-life data application, the Generalized Quasi-Likelihood (GQL) approach yields estimates with lower bias than the other estimation approaches.
Multivariate statistical characterization of groundwater quality in Fesdis, East of Algeria
Authors: Khelif Safia , Boudoukha Abderrahmane 
Published: June 2018

AbstractThis study is a contribution to the knowledge of hydrochemical properties of the groundwater in Fesdis Plain, Algeria, using multivariate statistical techniques including principal component analysis (PCA) and cluster analysis. 28 samples were taken during February and July 2015 (14 samples for each month). The principal component analysis (PCA) applied to the data sets has resulted in four significant factors which explain 75.19%, of the total variance. PCA method has enabled to highlight two big phenomena in acquisition of the mineralization of waters. The main phenomenon of production of ions in water is the contact water-rock. The second phenomenon reflects the signatures of the anthropogenic activities. The hierarchical cluster analysis (CA) in R mode grouped the 10 variables into four clusters and in Q mode, 14 sampling points are grouped into three clusters of similar water quality characteristics.
Water erosion on marl slopes and prevention of its effects using conservation of water and soil systems in the Wadi Isser watershed – Algeria
Authors: Zobiri Mohamed , Mazour Mohamed , Morsli Boutkhil 
Published: June 2018

AbstractWater erosion remains a major concern on the marly slopes. Where erosive processes continue to increase and continue to pose serious problems and where knowledge is still insufficient on erodibility and its evolution and on solutions to soil erosion problems. The aim of this work is to contribute to the understanding of the functioning of soils on marl substrate in relation to erosion and to evaluate the effectiveness of the anti-erosion measures used in this type of environment. The Isser watershed, where several anti-erosion techniques were used, is the subject of this study. The analysis of the anti-erosion installations shows that most of the developments have been made according to standards and have worked well. But their effectiveness is different from one technique to another. The earthen thresholds seem to be the most suitable and the most effective. The effectiveness of earthen structures is summed up in stability, durability, cost-effectiveness, sediment storage, flood plating and water storage for a significant length of time, and had a positive impact on reducing erosion and the silting rate of the dam. The gabion thresholds also have a better stability and a good seating, but they are very sensitive and can undergo damage that reduces their effectiveness with regard to erosion. Dry stone thresholds are the least desirable and are often inadequate and inefficient in this type of terrain. A purely mechanical and/or biological vision in this type of environment is however insufficient, the mechanical arrangements associated with the biological developments are more effective.
Intermediality and polymorphism of narratives in the Gothic tradition
Authors: Ihina Zoia 
Published: June 2018

Abstract
This article deals with polymorphous features of Gothic narratives seen as stories about supernatural events. Polymorphism reveals itself as a property of a narrative to be reinterpreted in the same medium or in different ones, and the main event is thus retranslated either authentically (in detail or in a reduced form) or with modifications of the form and content of the original. The article also suggests a classification of polymorphous Gothic narratives.
Religious ideologemes in transition: A residue of theological virtues in the emotionalist ethics of Victorian novels
Authors: Pinich Iryna 
Published: June 2018

AbstractThe study investigates the transition mechanisms of religious ideologemes observed in their lexical representation in the Victorian novel corpus. The paper claims that the amalgamation of Anglo-Catholic and Evangelical ideologies made for the subsequent transformation of theological virtues resulting in their internalized translation to the rising ideology of emotionalist moral values.
The main text-forming strategies in Robbe-Grillet's novel “Dans le labyrinthe”: Narrative and semiotic implications
Authors: Savchuk Ruslana 
Published: June 2018

Abstract
This paper presents a narrative-semiotic approach to the study of the processes and mechanisms of the 20th century French literary works. The complex methodology of the research is underpinned with the inter-paradigmatic methodological principle, according to which the narrative strategy of literary text production instantiates the author's individual narrative program of constructing narrative reality of a certain type, which is characterized by space-time continuity and stylistic figurativeness.
Evaluation of Non-Fermented Dough from Wheat/Barley/Hemp Composites
Authors: Hrušková M. , Švec I. 
Published: June 2018

Abstract
Basic wheat-barley flour premixes (70 : 30 and 50 : 50) were enhanced by 5 and 10% of dehulled and hulled hemp seeds wholemeal or by 2 types of hemp fine flour. Barley flour (BF) decreased both protein content and quality by approximately 1.5 and 50%, respectively. In blends, hemp fine flour containing recovered protein level back. BF lowered amylases activity by about 20–25% in maximum; hemp products had no significant effect. Farinograph water absorption was magnified by additions of both alternative flours. Considerable shortening of dough stability and decrease of resistance against over-mixing occurred for all flour tri-composites. Extensigraph dough elasticity increased and extensibility diminished. After dough resting taking 30 min, extensigraph energy of the control sample fell from 141 cm2 to a half as barley flour portion increased. In cereal composites, hemp products demonstrated reversal tendencies. BF lowered water suspension viscosity, but hemp wholemeal H4 and especially fine hemp flour H7 caused a recovery of amylograph maxima to level comparable with wheat control. Correlation analysis confirmed analytical and rheological data agreement – the extensigraph elasticity or energy could be predicted according to the Zeleny value, or the amylograph maximum according to the Falling Number (r = 0.79, 0.90, and 0.65, respectively; P = 99.9%).