bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development and Validation of a Knowledge Management Questionnaire
Authors: Aziz Deema T. , Bouazza Professor Abdelmajid , Jabur Professor Naeema H. , Hassan Dr. Abdelhamid S. , Al Aufi Dr. Ali 
Published: June 2019

Purpose: The purpose of this study was to propose a reliable and valid knowledge management performance measurement (KMPM) model for enterprises. Accordingly, this study draws on the knowledge management (KM) and factors affecting the flow of knowledge and its sharing in organizations, particularly the Ministry of Education (MOE) in Oman. Design/methodology: The study explored the current status of knowledge management (KM) in the MOE in general and knowledge sharing (KS) in particular; it also explored the factors affecting (KS). Therefore, it was divided into two sections: demographics and multiple choice questions comprising five factors: KMP, KS, Attitude, Commitment, and Shared Trust. The dimensional structure of the questionnaire was investigated with a sample of 136 employees holding various positions from the 9 Directorate General at the MEO in Oman (61.8% males and 38.2% females). Findings: Based on the factor analysis results, the questionnaire emphasized five factors: KMP, KS, Attitude, Commitment, and Shared Trust. The internal consistency and concurrent validity of KMPM were verified (Cronbach's alpha = 0.944). KMPM and its factors were significantly correlated with Socio-Technical Enablers (STE) scale. The validity of KMPM was tested using concurrent validity method and revealed a significant correlation of (0.847) between the two scales. This questionnaire was proved to be relatively reliable and valid. Practical implications: The researchers developed a questionnaire to measure the reality of KM initiatives in the MOE by assessing whether the work environment: (1) nurtures and accelerates the sharing of knowledge, (2) identifies enablers and obstacles affecting the flow of knowledge and (3) trains staff to capture the proper knowledge to be able to share it with the right people at the right time in the right form and at the right cost. The employees were classified according to job title into three levels: strategic, executive, and operational. Originality/value: This paper attempts to provide a comprehensive overview of the reality of knowledge management performance (KMP) capability assessment instrument in the MOE in Oman. No such measurement instrument currently exists in Oman. The instrument not only demonstrated consistent reliability, but also provided insights into organizational readiness for KMP with regard to three main individual factors, namely Commitment, Attitude, and Shared Trust.
Big data investment and knowledge integration in academic libraries
Authors: Manaseer Saher , Alawneh Afnan R. , Asoudi Dua 
Published: June 2019

Recently, big data investment has become important for organizations, especially with the fast growth of data following the huge expansion in the usage of social media applications, and websites. Many organizations depend on extracting and reaching the needed reports and statistics. As the investments on big data and its storage have become major challenges for organizations, many technologies and methods have been developed to tackle those challenges.
One of such technologies is Hadoop, a framework that is used to divide big data into packages and distribute those packages through nodes to be processed, consuming less cost than the traditional storage and processing methods. Moreover, it allows an organization to store all its data, unlike the traditional methods of selecting and discarding some data.
In this study, researchers investigate the investment of Hadoop in managing the academic libraries’ big data, focusing on three Vs (velocity, variety, and volume).
The studied population is academic libraries in Jordanian universities, and the results show how Hadoop framework using the map/reduce technique can be used to manage the big data of such libraries.
Estrategias comunicativas y tareas de interacción oral en L3 presenciales y en línea
Authors: Keim Cubas Lucrecia , Delgar Farrés Gemma 
Published: June 2019

Durante la realización de tareas orales de aula, tanto presenciales como en línea, los aprendientes se enfrentan a importantes retos comunicativos que les llevan a actuar de forma estratégica. En el presente artículo se compara el uso de estrategias comunicativas mientras dos parejas de estudiantes de francés y dos de alemán como lenguas adicionales realizan ocho tareas orales de forma presencial y en línea mediante videoconferencia a fin de estudiar la posible incidencia de la modalidad, la tipología de tarea y la lengua sobre el uso de estrategias comunicativas. Las tareas de tipo jigsaw y ranking se grabaron y transcribieron con el programa CLAN y el enfoque metodológico aplicado ha sido cualitativo. En nuestros datos, la tarea de tipo jigsaw suscitó sobre todo el uso de estrategias comunicativas relacionadas con procesos de clarificación, mientras que la tarea de tipo ranking favoreció las estrategias relacionadas con la reelaboración del discurso. Por otro lado, hay ligeras diferencias entre el alumnado de francés y el de alemán en el momento de activar estrategias compensatorias (búsqueda, petición de ayuda, cambio de código). En todos los casos las estrategias se activan de manera articulada tejiendo secuencias interactivas complejas. Así pues, los resultados de nuestro estudio apuntan a que, con excepción de la gestualidad icónica al activar la estrategia mímica, la modalidad no influye de forma destacable sobre el uso de estrategias. Sin embargo, tanto la tipología de tarea como la lengua de aprendizaje parecen haber tenido efecto sobre las estrategias activadas.
Evaluación de proceso de un programa universitario de inglés mediante Blended Learning
Authors: Martinic Lenta Rodolfo , Urzúa Martínez Sergio , Úbeda Menichetti Ricardo , Aranda Gengler Roxana 
Published: June 2019

En el contexto de globalización actual, las universidades deben enfrentar exigencias de internacionalización que implican proveer a los estudiantes una formación integral orientada al desarrollo de competencias profesionales, entre las cuales el dominio de una segunda lengua ocupa un lugar central. En este marco, durante los últimos años la Universidad de Santiago de Chile, ha implementado un programa de inglés Blended Learning en 48 carreras de ocho facultades, cuyo objetivo consiste en desarrollar competencias lingüísticas y comunicativas a un nivel intermedio. Para esto, el programa cuenta con tres componentes pedagógicos: clases presenciales, tutorías académicas y una plataforma on-line. A fines del año 2017 y comienzos del año 2018, se realizó una evaluación de proceso que buscó conocer, a partir de la perspectiva de los distintos actores involucrados, cómo se ha implementado el programa, poniendo énfasis en el avance hacia el cumplimiento de sus objetivos. La información fue recolectada a través de tres técnicas: una encuesta sobre la experiencia de aprendizaje aplicada a los estudiantes (N=780), un grupo focal con los docentes del programa y entrevistas semiestructuradas con coordinadores o jefaturas de carrera de la Universidad. Los resultados dan cuenta de una evaluación positiva del programa cuando se observa cada componente en su propio mérito. Sin embargo, al analizar la integración entre estos se constataron cuatro tensiones asociadas a: la orientación para el trabajo autónomo, la regulación en la distribución de tutorías, la transición de los contenidos pedagógicos desde la plataforma a la clase y la diferenciación funcional entre los distintos componentes.
Metasíntesis cualitativa sobre colaboración científica e identidad digital académica en redes sociales
Authors: Salinas Ibáñez Jesús , Marín Juarros Victoria Irene 
Published: June 2019

La colaboración científica y la gestión de la identidad académica tienen un papel importante en la productividad académica, como algunos estudios ya han mostrado. Con la aparición de las herramientas de redes sociales, esas posibilidades se han ampliado y la presencialidad en la actividad académica no es siempre necesaria. Algunos trabajos han abordado estos temas, pero todavía no existe una sistematización de la literatura que ayude a identificar posibles líneas de trabajo en este campo y muestre las ventajas y desventajas de modos alternativos de colaboración y desarrollo de la identidad académica en línea. Este estudio pretende cubrir ese vacío mediante una metasíntesis cualitativa de estudios centrados en el uso de las herramientas de redes sociales generalistas (de temática no específica) y académicas con propósitos de colaboración científica y cuidado de la identidad digital académica por parte de investigadores académicos. Las búsquedas se realizaron en cinco bases de datos internacionales relevantes en el campo de la educación. Además, se incorporaron algunas referencias bibliográficas de estudios principales. Este proceso llevó a la identificación final de 68 estudios entre 2008 y 2018, cuyos hallazgos se sintetizan en los resultados a través de una división por categorías. A modo de conclusión, se denota la falta de estudios con una visión crítica y de análisis profundo de las prácticas académicas en las herramientas de redes sociales y se discuten los resultados junto a líneas de investigación futuras respecto a las dimensiones identificadas: el networking, el intercambio de conocimiento y la identidad digital.
Determinación del uso problemático de las redes sociales por estudiantes universitarios
Authors: Marín-Díaz Verónica , Vega-Gea Esther , Passey Don 
Published: June 2019

Las Tecnologías de la Información y la Comunicación (TIC) en general, y el Internet en particular, están presenten diariamente en nuestras vidas. Es un hecho que vivimos en una sociedad digital, y por tanto, las nuevas generaciones pertenecen ya a lo que se ha denominado “nativos digitales”, ya que es el mundo en el que se desenvuelven continuamente. Ello ha provocado que comience a hablarse de uso problemático o abuso de determinadas herramientas que ofrecen las TIC, como es el caso de las Redes Sociales. El presente estudio tiene como propósito general realizar un análisis del uso de las redes sociales en estudiantes universitarios del Grado de Magisterio de Educación Infantil y Primaria de la Universidad de Córdoba. Para la recogida de la información se empleó una versión adaptada del Internet Adiction Test. Los resultados han indicado que el alumnado no percibe tener una conducta nociva ni con Internet ni con las redes sociales en particular. Un dato a resaltar es que las chicas han manifestado un uso más problemático de las redes sociales que los chicos. En conclusión, podemos indicar que los maestros en formación no presentan un uso problemático de las redes sociales. No obstante, consideramos que hay que tomar se considera que se debería tomar esta conclusión con cautela y seguir analizando el uso que se hace de las TIC.
Metabolomic and biochemical characterization of a new model of the transition of acute kidney injury to chronic kidney disease induced by folic acid
Authors: Perales-Quintana Marlene Marisol , Saucedo Alma L. , Lucio-Gutiérrez Juan Ricardo , Waksman Noemí , Alarcon-Galvan Gabriela , Govea-Torres Gustavo , Sanchez-Martinez Concepcion , Pérez-Rodríguez Edelmiro , Guzman-de la Garza Francisco J. , Cordero-Pérez Paula 
Published: June 2019

BackgroundRenal diseases represent a major public health problem. The demonstration that maladaptive repair of acute kidney injury (AKI) can lead to the development of chronic kidney disease (CKD) and end-stage renal disease has generated interest in studying the pathophysiological pathways involved. Animal models of AKI–CKD transition represent important tools to study this pathology. We hypothesized that the administration of multiple doses of folic acid (FA) would lead to a progressive loss of renal function that could be characterized through biochemical parameters, histological classification and nuclear magnetic resonance (NMR) profiling.MethodsWistar rats were divided into groups: the control group received a daily intraperitoneal (I.P.) injection of double-distilled water, the experimental group received a daily I.P. injection of FA (250 mg kg body weight−1). Disease was classified according to blood urea nitrogen level: mild (40–80 mg dL−1), moderate (100–200 mg dL−1) and severe (>200 mg dL−1). We analyzed through biochemical parameters, histological classification and NMR profiling.ResultsBiochemical markers, pro-inflammatory cytokines and kidney injury biomarkers differed significantly (P< 0.05) between control and experimental groups. Histology revealed that as damage progressed, the degree of tubular injury increased, and the inflammatory infiltrate was more evident. NMR metabolomics and chemometrics revealed differences in urinary metabolites associated with CKD progression. The main physiological pathways affected were those involved in energy production and amino-acid metabolism, together with organic osmolytes. These data suggest that multiple administrations of FA induce a reproducible model of the induction of CKD. This model could help to evaluate new strategies for nephroprotection that could be applied in the clinic.
Identification of diagnostic markers for major depressive disorder by cross-validation of data from whole blood samples
Authors: Wang Huimei , Zhang Mingwei , Xie Qiqi , Yu Jin , Qi Yan , Yue Qiuyuan 
Published: June 2019

Background
Major depressive disorder (MDD) is a severe disease characterized by multiple pathological changes. However, there are no reliable diagnostic biomarkers for MDD. The aim of the current study was to investigate the gene network and biomarkers underlying the pathophysiology of MDD.

Methods
In this study, we conducted a comprehensive analysis of the mRNA expression profile of MDD using data from Gene Expression Omnibus (GEO). The MDD dataset (GSE98793) with 128 MDD and 64 control whole blood samples was divided randomly into two non-overlapping groups for cross-validated differential gene expression analysis. The gene ontology (GO) enrichment and gene set enrichment analysis (GSEA) were performed for annotation, visualization, and integrated discovery. Protein–protein interaction (PPI) network was constructed by STRING database and hub genes were identified by the CytoHubba plugin. The gene expression difference and the functional similarity of hub genes were investigated for further gene expression and function exploration. Moreover, the receiver operating characteristic curve was performed to verify the diagnostic value of the hub genes.

Results
We identified 761 differentially expressed genes closely related to MDD. The Venn diagram and GO analyses indicated that changes in MDD are mainly enriched in ribonucleoprotein complex biogenesis, antigen receptor-mediated signaling pathway, catalytic activity (acting on RNA), structural constituent of ribosome, mitochondrial matrix, and mitochondrial protein complex. The GSEA suggested that tumor necrosis factor signaling pathway, Toll-like receptor signaling pathway, apoptosis pathway, and NF-kappa B signaling pathway are all crucial in the development of MDD. A total of 20 hub genes were selected via the PPI network. Additionally, the identified hub genes were downregulated and show high functional similarity and diagnostic value in MDD.

Conclusions
Our findings may provide novel insight into the functional characteristics of MDD through integrative analysis of GEO data, and suggest potential biomarkers and therapeutic targets for MDD.
Analysis of the Production Components in the Soybean Crop in the Last Two Decades in the State of Parana and Brazil
Authors: Lazaretti Norma Schlickmann , Abraão Patrícia Clemente , Mata Tatiane Calandrino Da , Cardoso Kerolém Prícila Sousa , Cordeiro Noélle Khristinne , Souza Dablieny Hellen Garcia , Bernardi Daiane , Júnior Eurides Kuster Macedo 
Published: June 2019

Introduction: Soy is an agricultural crop that has great economic importance. The analysis considering the cultivated area, the production and the yield of grains contributes to research and transfer of technology to the producers.
Aims: To adjust the mathematical model using simple linear regression analysis and correlation between the variables of planted area, production and productivity, in the state of Paraná and Brazil, in the last two decades.
Study Design: Data collection and research of information on the cultivation of soybeans in the state of Paraná and in Brazil on official websites
Place and Duration of Study: State University of Western Paraná, Post-Graduation in Agronomy, between July 2018 and December 2018.
Methodology: Data were obtained from the Portal of the Brazilian Institute of Geography and Statistics between 1997 and 2017. Simple linear regression analysis and Pearson correlation analysis were used.
Results: By analyzing the results, it is possible to observe significant increases in soybean production in both Paraná and Brazil over this 20-year period. Paraná achieved a 205% increase in planted area, 290% in production and 141% in average yield.
Conclusion: The simple linear regression and correlation analysis showed an adjustment between the cultivated area, the production and the average productivity in the soybean crop in the period from 1997 to 2017.
Protecting Effect of Vitamin E against Chromosomal Damage Induced by an Extremely Low-frequency Electromagnetic Field in Murine Bone Marrow Erythrocytes
Authors: Kheiry Elahe Vadaye , Haddad Farhang 
Published: June 2019

Living organisms including human are exposed to an electromagnetic field from natural and industrial sources. Genotoxic effects of electromagnetic fields have been reported by several studies. Vitamin E is a lipid-soluble antioxidant that plays an important role in maintaining the integrity and function of cell membranes, nervous system, and reproductive system, among others, by functioning as a defence against oxidative damage. In this research, the protective effects of vitamin E against the chromosomal damage induced by extremely low-frequency electromagnetic field (ELEM) on bone marrow erythrocytes of adult male BALB/c mouse have been studied. Adult male BALB/c mice were intraperitoneally injected with vitamin E, with the dose of 200 mg/kg for 8 days and then exposed to ELEM with the intensity of 50Hz for 4 hours for 4 consecutive days. The mice were dissected and micronucleus assay was performed on the polychromatic erythrocytes (PCE) of their bone marrow. Results show that ELEM could increase the chromosomal damage judged by the higher frequency of MN compared to control. Results also revealed that the frequency of micronucleated polychromatic erythrocytes (MNPCE) had substantially decreased (p<0.00 1) in vitamin E- treated mice compared to untreated. Data suggest the protecting effect of vitamin E in bone marrow cells of Balb/C mice against the ELEM.
A Coherently Strained Monoclinic [111]PbTiO3 Film Exhibiting Zero Poisson's Ratio State
Authors: Tang Yunlong , Zhu Yinlian , Ma Xiuliang , Hong Zijian , Wang Yujia , Wang Wenyuan , Xu Yaobin , Liu Ying , Wu Bo , Chen Lang , Huang Chuanwei , Chen Longqing , Chen Zuhuang , Wu Haijun , Pennycook Stephen J. 
Published: June 2019

Abstract[111]‐Oriented perovskite oxide films exhibit unique interfacial and symmetry breaking effects, which are promising for novel quantum materials as topological insulators and polar metals. However, due to strong polar mismatch and complex structural reconstructions on (111) surfaces/interfaces, it is still challenging to grow high quality [111] perovskite heterostructures, let alone explore the as‐resultant physical properties. Here, the fabrication of ultrathin PbTiO3 films grown on a SrTiO3(111) substrate with atomically defined surfaces, by pulsed laser deposition, is reported. High‐resolution scanning transmission electron microscopy and X‐ray diffraction reveal that the as‐grown [111]PbTiO3 films are coherent with the substrate and compressively strained along all in‐plane directions. In contrast, the out‐of‐plane lattices are almost unchanged compared with that of bulk PbTiO3, resulting in a 4% contraction in unit cell volume and a nearly zero Poisson's ratio. Ferroelectric displacement mapping reveals a monoclinic distortion within the compressed [111]PbTiO3, with a polarization larger than 50 µC cm−2. The present findings, as further corroborated by phase field simulations and first principle calculations, differ significantly from the common [001]‐oriented films. Fabricating oxide films through [111] epitaxy may facilitate the formation of new phase components and exploration of novel physical properties for future electronic nanodevices.
The Accelerating World of Graphdiynes
Authors: Sakamoto Ryota , Fukui Naoya , Maeda Hiroaki , Matsuoka Ryota , Toyoda Ryojun , Nishihara Hiroshi 
Published: June 2019

AbstractGraphdiyne (GDY), a 2D allotrope of graphene, is first synthesized in 2010 and has attracted attention as a new low‐dimensional carbon material. This work surveys the literature on GDYs. The history of GDYs is summarized, including their relationship with 2D graphyne carbons and yearly publication trends. GDY is a molecule‐based nanosheet woven from a molecular monomer, hexaethynylbenzene; thus, it is synthesized by bottom‐up approaches, which allow rich variation via monomer design. The GDY family and the synthetic procedures are also described. Highly developed π‐conjugated electronic structures are common important features in GDY and graphene; however, the coexistence of sp and sp2 carbons differentiates GDY from graphene. This difference gives rise to unique physical properties, such as high conductivity and large carrier mobility. Next, the theoretical and experimental studies of these properties are described in detail. A wide variety of applications are proposed for GDYs, including electrocatalysts and energy devices, which exploit the carbon‐rich nature, porous framework, and expanded π‐electron system of these compounds. Finally, potential uses are discussed.
Self‐Supported and Flexible Sulfur Cathode Enabled via Synergistic Confinement for High‐Energy‐Density Lithium–Sulfur Batteries
Authors: Wang Zhuosen , Shen Jiadong , Liu Jun , Xu Xijun , Liu Zhengbo , Hu Renzong , Yang Lichun , Feng Yuezhan , Liu Jun , Shi Zhicong , Ouyang Liuzhang , Yu Yan , Zhu Min 
Published: June 2019

AbstractLithium–sulfur (Li–S) batteries have attracted much attention in the field of electrochemical energy storage due to their high energy density and low cost. However, the “shuttle effect” of the sulfur cathode, resulting in poor cyclic performance, is a big barrier for the development of Li–S batteries. Herein, a novel sulfur cathode integrating sulfur, flexible carbon cloth, and metal–organic framework (MOF)‐derived N‐doped carbon nanoarrays with embedded CoP (CC@CoP/C) is designed. These unique flexible nanoarrays with embedded polar CoP nanoparticles not only offer enough voids for volume expansion to maintain the structural stability during the electrochemical process, but also promote the physical encapsulation and chemical entrapment of all sulfur species. Such designed CC@CoP/C cathodes with synergistic confinement (physical adsorption and chemical interactions) for soluble intermediate lithium polysulfides possess high sulfur loadings (as high as 4.17 mg cm–2) and exhibit large specific capacities at different C‐rates. Specially, an outstanding long‐term cycling performance can be reached. For example, an ultralow decay of 0.016% per cycle during the whole 600 cycles at a high current density of 2C is displayed. The current work provides a promising design strategy for high‐energy‐density Li–S batteries.