bluuebunny/crossref_metadata_2025_split huggingface dataset:
A radiological diagnostic approach to tumours and tumour-like lesions of the calcaneus
Authors: Azzopardi Christine , Patel Anish , James Steven , Botchu Rajesh , Davies Mark 
Published: July 2021

Objective: The calcaneus is a rare location for the development of primary bone tumours. The purpose of the study is to review the imaging findings in a cohort of patients presenting with tumours and tumour-like lesions of the calcaneus and to develop a more structured approach to the diagnosis of calcaneal lesions. Methods: A retrospective study with a collection of 167 cases of calcaneal tumours and tumour-like lesions from our tertiary orthopaedic oncology institution over a period of 13 years. Cases were reviewed by two consultant musculoskeletal radiologists and the location of the lesion within the calcaneus and demographics of the patient were noted for each case. A diagnostic algorithm, which is based on patient age and tumour location, was then extrapolated. Results: Out of the 167 cases, we identified 24 different calcaneal pathologies which included both tumours and tumour-like lesions. The most common being simple bone cysts (18.3% of cases) and intra-osseous lipoma (15% of cases) sited in the diaphyseal equivalent of the calcaneus. A diagnostic algorithm was formulated, which describes the most common location of the different pathologies including both benign and malignant pathologies, subdivided by age. Conclusion: Our algorithm should help the radiologist narrow down the differential diagnosis when evaluating calcaneal lesions. Advances in knowledge: This article provides a radiological approach to calcaneal lesions.
Η επίδραση του προσανατολισμού στόχου, της αθλητικής ταυτότητας και των συναισθημάτων στην αθλητική συμπεριφορά μαθητών σε μαθητικούς αγώνες
Authors: Καζίλας Χαράλαμπος , Αθαναηλίδης Ιωάννης , Λάϊος Αθανάσιος , Μπεμπέτσος Ευάγγελος 
Published: July 2021

Ο αθλητισμός ως κοινωνικό φαινόμενο και εκδήλωση συμπεριφοράς, καλλιεργεί κοινωνικές και ηθικές αξίες, των οποίων τα χαρακτηριστικά που προωθεί, εξαρτώνται στενά από το πώς διδάσκονται και εφαρμόζονται τα διάφορα αθλήματα.Σκοπός της μελέτης αυτής είναι να εξετασθεί η επίδραση του προσανατολισμού στόχου, της αθλητικής ταυτότητας και των συναισθημάτων στην αθλητική συμπεριφορά των μαθητών. Επίσης να διερευνηθεί η ύπαρξη πιθανών διαφορών στις εξεταζόμενες μεταβλητές σε σχέση με το γένος. Για την διεξαγωγή της έρευνας 156 μαθητές και μαθήτριες (86 αγόρια και 70 κορίτσια με μ.ο ηλικίας 16,5 χρόνων) συμπλήρωσαν τρία ερωτηματολόγια το Task and Ego Orientation in Sport Questionnaire (TESOSQ; Duda & Nicholls, 1992), το Competative Aggressiveness and Anger Scale (CAAS; Maxwell & Moores, 2007), το Athletic Identity Measurement Scale (AIMS; Brewer & Cornelius 2001 ), και τo Prosocial and Antisocial Behavior (Kavussanu, 2006).Η στατιστική επεξεργασία των δεδομένων πραγματοποιήθηκε με τη χρήση του στατιστικού προγράμματος SPSS 17. Όλες οι κλίμακες είχαν υψηλό βαθμό εσωτερικής συνοχής.Από τα αποτελέσματα της έρευνας φάνηκε ότι συμφωνούν με αυτά παλαιοτέρων ερευνών ότι τα κίνητρα, η αθλητική ταυτότητα και τα συναισθήματα επιδρούν καθοριστικά στην αθλητική συμπεριφορά σύμφωνα με την ανάλυση παλινδρόμησης. Ως προς το γένος, τα παραπάνω αποτελέσματα επιβεβαιώνουν προηγούμενες έρευνες οι οποίες βρήκαν διαφορές, με τα αγόρια να εμφανίζουν περισσότερες αρνητικές αθλητικές συμπεριφορές σε σχέση με τα κορίτσια, στο χώρο του αθλητισμού σύμφωνα με το Student t-test.
Perceptions of competency in advanced clinical practice
Authors: Cooper James , Lidster Jo 
Published: July 2021

Background: Historically, there has been limited research carried out on the competency of individuals undertaking advanced clinical roles. Aims: To research advanced clinical practitioner (ACP) perceptions of the term competency, and how they evidence their competency in practice. Methods: A cross-sectional, qualitative study used semi-structured interviews, which were analysed by content analysis. Six participants were recruited to the study. Findings: There is disparity in the definitions of ‘trainee’ and ‘qualified’ ACP in clinical practice as well as disparity and ambiguity regarding being able to work in a supernumerary capacity during training and master's level study. There is a lack of agreement over the benchmark for qualified ACP status and the road to getting there. Conclusion: ACPs should be employed in a supernumerary capacity while training and work towards a full MSc in advanced clinical practice. They should maintain a portfolio of their competency. Work must also be carried out nationally to identify both generic and specialist curricula for ACPs to benchmark against.
En el inferno sonoro con María Zambrano
Authors: Pardo Salgado Carmen 
Published: July 2021

Los nexos entre los distintos tipos de inferno y la música en Zambrano nos llevan a mostrar, en primer lugar, la relación entre música del alma y música sensible en su obra. En segundo lugar, el texto analiza la música sensible que Zambrano escucha —su fondo sonoro—, para pasar después al paisaje sonoro de la música contemporánea. En este pasaje, la fgura de Orfeo sirve de guía para interrogar, en tercer lugar, la imagen del Orfeo moderno y su descenso a los infernos cotidianos. En esta trayectoria, las obras de Stravinsky, de Birtwistle y de Jerez e Iges nos permiten trazar un diálogo con el pensamiento de la filósofa malagueña.
Active THz metasurfaces for compact isolation
Authors: Almpanis Evangelos , Zouros Grigorios P. , Tsakmakidis Kosmas L. 
Published: July 2021

Metasurfaces constitute an emerging technology, allowing for compact manipulation of all degrees of freedom of an incident lightwave. A key ongoing challenge in the design of these structures is how to allow for energy-efficient dynamic (active) operation, particularly for the polarization of incident light, which other standard devices typically cannot efficiently act upon. Here, we present a quasi-two-dimensional magneto-optic metasurface capable of simultaneously high-contrast on/off operation, as well as rotation of the polarization angle of a linearly polarized wave—that is, without converting the incident linear polarization to elliptical, which is normally particularly challenging. Furthermore, the device’s operation is broadband, with a bandwidth of around 5 µm, and can be conveniently manipulated using an external magnetic bias. Our findings, corroborated using two different full-wave simulation approaches, may allow for functional metasurfaces operating in the terahertz (THz) regime, giving rise to robust, energy-efficient, and high-dynamic-range broadband isolation, to be used for a wealth of optoelectronic and communication applications.
El rol del tutor en un ambiente virtual de aprendizaje para la formación continua de docentes
Authors: Silva Quiroz Juan Eusebio 
Published: July 2021

El potencial comunicativo de las tecnologías de la información y comunicación (TIC) está transformando los ambientes de enseñanza y aprendizaje en los cuales han sido introducidas. Esta introducción ha adoptado, principalmente, dos formas: formación en línea o como complemento a la clase presencial. Estas tecnologías permiten la creación de entornos virtuales, bajo enfoques metodológicos no tradicionales, transitando desde un aprendizaje individual a un aprendizaje colaborativo, desde la transmisión a la construcción de conocimiento. En estos entornos, el rol del tutor es determinante para el éxito de una actividad formativa centrada más en la colaboración y construcción de conocimiento en red. Este artículo presenta los resultados preliminares de una investigación que busca conocer y caracterizar el rol pedagógico del tutor en la animación de los ambientes asíncronos de un espacio virtual de aprendizaje, en el contexto de un curso de formación a distancia para docentes.
Los procesos de emprendimiento en Colombia y su incidencia en los sectores productivos
Authors: Lopez-Rodriguez Campo Elias , Cabrera-Jimenez Manuel Fernando , Cristancho–Triana Gerson Jaquin 
Published: July 2021

El emprendimiento es una actividad generadora de riqueza, puesto que el conocimiento, la creatividad y la innovación de ideas emprendedoras, beneficiarán la sociedad y a su vez al sector productivo. Por medio de una revisión de la literatura se reconoce la evolución de los procesos emprendedores en Colombia y su incidencia en sus sectores productivos.
Se evidencia que el sector con menor stock de empresas es el de construcción y el de mayor corresponde al sector de comercio, el sector servicios es el de mayor volatilidad, mientras que el sector industria es el más estático. Los servicios comienzan a tener un descenso paulatino frente al desarrollo de emprendimientos futuros, siendo el consumo el sector clave en términos creación de empresas para el contexto colombiano.
Estimación de demanda de milanesas de cerdo y estudio de viabilidad financiera del proyecto: «Elaboración y comercialización de milanesas de cerdo para Piamontesa SA»
Authors: Rivera Maria Morena 
Published: July 2021

Mediante el estudio y la estimación de la demanda de diferentes tipos de milanesas a partir de elecciones de preferencias declaradas, se estimó la cuota de mercado correspondiente a las milanesas de cerdo en la ciudad de Brinkmann, provincia de Córdoba. Una vez conocida dicha demanda, se procedió a evaluar la factibilidad financiera de llevar a cabo un proyecto de inversión sobre elaboración y comercialización de milanesas de cerdo en la misma localidad por una empresa del rubro porcino, Piamontesa SA. Para ello se elaboró un Flujo de Caja y se emplearon los criterios de decisión de Valor Actual Neto (VAN) y Tasa Interna de Retorno que evidenciaron que el proyecto resulta rentable, por lo cual, en un contexto de certeza, a priori, sería recomendablerealizar la inversión. Para completar el estudio, se efectuaron análisis de sensibilidad, análisis de escenarios y análisis de riesgo, este último mediante una simulación de Montecarlo, para los cuales el proyecto resiste a las intervenciones y continúa siendo rentable, en la mayoría de los casos. El nivel de riesgo del proyecto resulta ser muy bajo con una probabilidad acumulada de que el VAN sea negativo de 0,007.
Estabilidad dinámica de un modelo factorial para la pobreza multidimensional en Argentina
Authors: Satorres Bechara Ana Paula 
Published: July 2021

Este trabajo examina la invarianza factorial longitudinal de un modelo para la pobreza multidimensional en Argentina hallado a través de métodos robustos de Análisis Factorial Exploratorio (AFE) y Análisis Factorial Confirmatorio (AFC).Se utilizan los microdatos de la Encuesta Permanente de Hogares (EPH) de los cuartos trimestres de los años pertenecientes a dos periodos —2003 a 2006 y 2016 a 2019— seleccionados por ser representativos de fases diferentes del ciclo económico: recuperación y recesión. Se pretende de esta manera evaluar la invarianza factorial en dos sentidos: tanto para años consecutivos dentro un mismo contexto económico, como para periodos enmarcados en coyunturas diametralmente opuestas.
A través del AFE y el AFC se hallan, para ambos periodos, tres dimensiones que subyacerían a la pobreza en Argentina, que fueron denominados ingresos, vivienda y entorno.
El nivel máximo de invarianza alcanzado para años consecutivos dentro de un mismo contexto fue la invarianza débil, nivel que asegura que las cargas factoriales sean constantes año a año. Por su parte, la evaluación entre periodos alcanzó como máximo nivel la invarianza configuracional, asegurándose únicamente la igualdad en la estructura factorial de un periodo a otro.
Estos resultados no son triviales ya que condicionan los estudios dinámicos de pobreza multidimensional, restringiendo las conclusiones a las que pueden arribarse al comparar los resultados de la misma de un año a otro, y más aún entre contextos diferentes.
Fraude contable y corrupción. Reflexiones en torno a la responsabilidad civil del auditor de estados financieros
Authors: Rezzoagli Bruno Ariel 
Published: July 2021

Este escrito tiene por objetivo, por un lado, delimitar los elementos distintivos de la corrupción organizacional desde una perspectiva contable, a partir del análisis y caracterización de las prácticas fraudulentas y creativas, y por otro, reflexionar sobre el rol actual del auditor de estados financieros y su responsabilidad frente a la falta de detección de estas.Se trata de un trabajo de metodología cualitativa, de carácter descriptivo y analítico, mediante el empleo de técnicas de investigación documental, con especial análisis de fuentes bibliográficas y de la norma internacional de auditoría (NIA) 240. Con base en dicho estudio, se presenta una serie de conceptos (discrecionalidad, arbitrariedad y elusión contable) que posibilitan una mejor comprensión de las prácticas de contabilidad relacionadas con la corrupción. Asimismo, se exponen las limitaciones de la auditoría financiera en la identificación del fraude contable y se destaca la importancia de una adecuada planificación del trabajo de auditoría. Finalmente, se concluye que el hecho de que las normas contables presenten ambigüedades u otorguen cierto grado de maniobra a quienes preparan la información financiera, y que ello dificulte al auditor identificar prácticas fraudulentas, creativas o elusivas; no lo exime de responsabilidad por los daños y perjuicios patrimoniales que su falta de detección, por mal desempeño, cause en terceros.
The Connotation, Features, and Mechanism of Computational Propaganda
Authors: Yang Jin 
Published: July 2021

The purpose of the work is to identify the connotation, features of computational propaganda and reveal how computational propaganda uses new technologies to manipulate public opinion.
The study’s hypothesis is the assumption that computational propaganda, as a new type of propaganda and manipulation of public opinion spawned in the era of artificial intelligence, stealthily and massively steers public opinion using new technologies to influence political and social processes.
With the scientific methods such as event analysis and case-study, the work concludes that more and more governments, political parties, and strategic communication companies use social media as the digital platform, Internet bots as the automated executors, and algorithms as the computational technical guarantee, by participating in, guiding and creating controversial topics and events, to manipulate public opinion and win international competitions, policy debates, elections, etc.
Testing and e-learning activity designed to enhance student nurses understanding of continence and mobility
Authors: Dahlke Sherry , Hunter Kathleen F. , Pietrosanu Matthew , Kalogirou Maya R. 
Published: July 2021

AbstractObjectivesThe aim of this study was to test if the e-learning activity that we developed could improve student nurses’ knowledge of continence and mobility and whether or not students would find the style of learning beneficial.MethodsA quasi-experimental pre-post-test design was used to test if the continence and mobility e-learning activity could improve student nurses’ knowledge about assessing and managing the needs of continence and mobility. An 18-item true/false knowledge of continence quiz was completed by 116 student nurses and a Likert style feedback learning survey was completed by 135 nursing students.ResultsThere was a statistically significant increase in students’ knowledge about continence and its relationship to mobility following the e-learning activity. The e-learning activity also enhanced students’ knowledge, confidence and perceptions about older people.ConclusionsThe e-learning activity we developed has the potential to improve nursing students’ knowledge about continence and mobility in an enjoyable manner.
Sugar sweetened beverages consumption among female university students
Authors: Budai B. Cs. , Lichthammer A. 
Published: July 2021

AbstractPurposeThe aim of this study was to assess the consumption frequency of sugar sweetened beverages, physical activity, BMI values and their relationships among university students.Material/MethodsThe data collection has been carried out with the help of questionnaires. The target population were students between the ages of 18 and 30, who study at the Faculty of Health Sciences (67 students) or at the Faculty of Humanities (64 students). The frequency of beverage consumption was assessed with a Food Frequency Questionnaire (FFQ) designed for sugar sweetened beverages and physical activity with the short form of the International Physical Activity Questionnaire.ResultsThe most frequently consumed sugar sweetened beverage was freshly squeezed or 100% fruit juice in both faculties. The difference between the average BMI of the two groups was statistically significant (P = 0.035). A non-significant relationship was found between BMI and sugar sweetened beverages consumption.ConclusionsThe most consumed sugar sweetened beverage was freshly squeezed or 100% fruit juice, but it contains a lot of added sugar that contributes to developing overweight. Health education programmes are needed to teach the students of every faculty about healthy drink consumption.
Reliability assessment of power supply systems with powerful nonlinear loads
Authors: Papaika Yu.A. , Lysenko O.G. , Bublikov A.V. , Olishevskiy I.G. 
Published: July 2021

Purpose. To substantiate the expediency of applying distribution laws to model the reliability of power supply systems with powerful nonlinear loads.
Methodology. Application of exponential and normal distribution laws, and Weibull's law.
Findings. In a comprehensive assessment of the problem of electromagnetic compatibility and the development of multicriteria parameters of energy efficiency of power supply systems of industrial enterprises, it is most appropriate to use the reliability of the elements that are mathematically described by the Weibull distribution. At the same time, the results of modeling of typical electrical modes and variations of substitution schemes of enterprises showed the sensitivity of reliability indicators to changes in power system capacity.
Originality. New theoretical foundations for research in modern power supply systems with increasing nonlinear load capacity have developed the scientific basis for analysis and synthesis of energy processes in multiphase electrical systems and propose methods of correction taking into account the complex action of sources of electromagnetic interference. And also to offer methods of estimation of their influence on reliability and efficiency of work of the basic electrotechnological equipment.
Practical value. The possibility of applying the obtained results to assess the reliability of power supply systems with powerful nonlinear loads is substantiated. The necessary accuracy and reliability of the decision at the levels of random events, quantities and processes is provided. The mathematical apparatus for the analysis of the main indicators of reliability in the presence of non-sinusoidal voltage is given. Conclusions are made on the adequacy of the calculation results at different stages of electricity distribution. It is shown that the simultaneous optimization of reliability and voltage quality are components of a complex scientific problem of ensuring energy efficiency of electrical networks in the implementation of decentralized models of the energy system.
An energy efficient electric drive of air units
Authors: Kotsur I.M. , Hurazda A.V. , Dolia B.A. , Shestov L.E. 
Published: July 2021

Purpose. Improving the efficiency and energy performance of an asynchronous electric drive for stationary fan’s units of the main ventilation line of mines.
Methodology. The research was carried out using the methods of the theory of electrical circuits, mathematical physics, simulation, interpolation and approximation
Findings. The research of electromagnetic and energy processes in the asynchronous electric drive system with pulse control at a fan load, taking into account the variable aerodynamic parameters of the main ventilation line of mines. An electric drive system is able to respond with high accuracy and reliability to changes in the aerodynamic parameters of the main ventilation line of mines has been proven. This will also increase the power factor of the electric drive at a fan load up 0.8 to 0.93 p.u., and the efficiency up 92.5% to 94.5%, when regulating in the range of the operating slip of the rotor of the drive fan motor = 0.5 ÷, which, respectively, is on average up 0,25% to 40 higher in comparison with systems of an unregulated electric drive. Recommendations has been developed for the design and rational selection of the rated fan capacity for the main ventilation line to advance the best energy efficiency level of the electric drive.
Originality. The research of electro-mechanical, electro-energy power and aerodynamic processes in the dynamic modes of the fan electric drive was carried out. The fan-loaded "induction motor-converter" system has been proven to be self-regulating. It is able to respond with high accuracy and reliability even at low switching frequencies of the power chopper to any changes of the aerodynamic parameters of the main ventilation line of mines.
Practical value. Recommendations has been developed for the design and rational selection of the rated fan capacity for the main ventilation line to advance the best energy efficiency level of the electric drive.
Gestión continua de negocio, indicadores para la toma de decisiones
Authors: Maldonado-Pedroza Cristian David , Guzmán-Useche Hugo , Tunjano-Pinzón Iván Francisco , García-López Johan , Álvarez-Barragán Luis Aníbal , Morales-Sierra María Eugenia , Hernández-Mora Nydia Consuelo , Martínez-Contreras Ronald Mauricio , Vargas-Leguizamón Yolanda Rocío 
Published: July 2021

¿Cuál es la importancia de los indicadores financieros como: EBITDA y Margen EBITDA, ROA, ROE, Costo promedio ponderado de capital y EVA?, y ¿cómo estos influyen en las decisiones de un empresario consciente de sus finanzas?
Las empresas constituidas legalmente llevan un proceso de contabilidad que les permite, entre otras cosas, identificar el valor de sus activos y registrar hechos económicos, como ingresos y salidas de dinero. A pesar de que en algunos casos esta información solo se lleva con fines tributarios, es útil para hacer un diagnóstico financiero que le puede ayudar a las organizaciones a enfrentar importantes retos que condicionan su supervivencia.
CONSUMER CULTURE STUDIES, A GLANCE AT THE LITERATURE’S CONTRIBUTIONS TO THE CONCEPT
Authors: Norman-Acevedo Eduardo , Sosa-Varela Juan Carlos , Bonomo Adriana , Corona-Cabrera Violeta 
Published: July 2021

Publishing a book on consumer culture studies originates from the need to review research conducted on this subject. Among the expectations of Politécnico Grancolombiano Institución Universitaria, and as a result of reviews on the subject, this opportunity was identified within scientific literature. This book intends to be useful for readers by identifying international research trends in this field. It also aims to support the decision-making of marketing managers, with respect to consumers, and to have important input that fosters future research.To do so, the institution introduces the structure of this editorial project, which first identified relevant authors and made an initial call to authors based on an approach to the state of the art by implementing a systematic literature review (SLR) (Kitchenham, 2004). The call made in August 2017 proposed that a select group of authors participate in the project with a chapter of its structure, given that they have indicated their interest in the subject. This proposal received great reception among those invited, including eight articles submitted, from which, after a rigorous selection process, contributions of five chapters were included at the date of publication with participation from international researchers who believed in our project.