bluuebunny/crossref_metadata_2025 huggingface dataset:
Lignicolous fungal assemblages and relationships with environment in broadleaved and mixed forests from the North-East Region of Romania
Authors: Copoț Ovidiu , Mardari Constantin , Bîrsan Ciprian C. , Tănase Cătălin
Published: March 2020

Background and aims – Lignicolous fungal assemblages perform numerous functions in forest ecosystems, one of the most important being their capacity to decay wood. As a consequence of their belonging to different ecological niches, the forest ecosystem influences the fungal assemblages in terms of species richness and composition. Methods – In this study we analyzed the main lignicolous macrofungal assemblages in some deciduous and mixed deciduous-coniferous forests in the North-East Region of Romania. We searched to find fungal indicator species for a certain forest type and which are the main drivers and their effects on the composition of the lignicolous macrofungal assemblages. Fungal assemblages were identified using a hierarchical agglomerative clustering procedure, while diagnostic species for each cluster were identified based on the indicator value index. Relationships between fungal composition of plots and environmental variables were performed using detrended and canonical correspondence analyses.Key results – A total of 377 fungal taxa in approximately 4600 records (in 59 plots) were identified. Six distinct clusters of lignicolous fungal assemblages were defined and separated three groups: 1) species-rich lignicolous fungal assemblages in beech forests (1 cluster), 2) well defined fungal assemblages in the mixed broadleaved-coniferous forests (2 clusters), and 3) fungal assemblages typical to oak forests (3 clusters). Ordination methods highlighted the forest type as the most important factor influencing the fungal composition of plots. Forestry Aridity Index, tree diversity and large trees basal area were also important factors for fungal assemblages but with a lower contribution. Conclusion – In the studied region, fungal assemblages changed from oak to beech and to mixed, broadleaved-coniferous forests mainly as a consequence of different tree composition. Climate also shaped fungal composition but to a lesser extent.
Technical note: LIMS observations of lower stratospheric ozone in the southern polar springtime of 1978
Authors: Remsberg Ellis , Harvey V. Lynn , Krueger Arlin , Gordley Larry , Gille John C. , Russell III James M.
Published: March 2020

Abstract. The Nimbus 7 Limb Infrared Monitor of the Stratosphere (LIMS) instrument
operated from 25 October 1978 through 28 May 1979. This note focuses on
its Version 6 (V6) data and indications of ozone loss in the lower
stratosphere of the Southern Hemisphere subpolar region during the last
week of October 1978. We provide profiles and maps that show V6 ozone values
of only 2 to 3 ppmv at 46 hPa within the edge of the polar vortex near
60∘ S from late October through mid-November 1978. There are also
low values of V6 nitric acid (∼3 to 6 ppbv) and nitrogen
dioxide (< 1 ppbv) at the same locations, indicating that conditions
were suitable for a chemical loss of Antarctic ozone some weeks earlier.
These “first light” LIMS observations provide the earliest space-based
view of conditions within the lower stratospheric ozone layer of the
southern polar region in springtime.
Technical note: Determination of binary gas-phase diffusion coefficients of unstable and adsorbing atmospheric trace gases at low temperature – arrested flow and twin tube method
Authors: Langenberg Stefan , Carstens Torsten , Hupperich Dirk , Schweighoefer Silke , Schurath Ulrich
Published: March 2020

Abstract. Gas-phase diffusion is the first step for all heterogeneous reactions under atmospheric conditions. Knowledge of binary diffusion coefficients is
important for the interpretation of laboratory studies regarding heterogeneous trace gas uptake and reactions. Only for stable, nonreactive and nonpolar gases do well-established models for the estimation of diffusion coefficients from viscosity data exist. Therefore, we have used two
complementary methods for the measurement of binary diffusion coefficients in the temperature range of 200 to 300 K: the arrested flow
method is best suited for unstable gases, and the twin tube method is best suited for stable but adsorbing trace gases. Both methods were validated
by the measurement of the diffusion coefficients of methane and ethane in helium and air as well as nitric oxide in helium. Using the arrested flow method the
diffusion coefficients of ozone in air, dinitrogen pentoxide and chlorine nitrate in helium, and nitrogen were measured. The twin tube method was
used for the measurement of the diffusion coefficient of nitrogen dioxide and dinitrogen tetroxide in helium and nitrogen.
Phytoplankton and dimethylsulfide dynamics at two contrasting Arctic ice edges
Authors: Lizotte Martine , Levasseur Maurice , Galindo Virginie , Gourdal Margaux , Gosselin Michel , Tremblay Jean-Éric , Blais Marjolaine , Charette Joannie , Hussherr Rachel
Published: March 2020

Abstract. Arctic sea ice is retreating and thinning and its rate of decline has
steepened in the last decades. While phytoplankton blooms are known to
seasonally propagate along the ice edge as it recedes from spring to summer,
the substitution of thick multiyear ice (MYI) with thinner, ponded
first-year ice (FYI) represents an unequal exchange when considering the
roles sea ice plays in the ecology and climate of the Arctic. Consequences
of this shifting sea ice on the phenology of phytoplankton and the
associated cycling of the climate-relevant gas dimethylsulfide (DMS) and its
precursor dimethylsulfoniopropionate (DMSP) remain ill constrained. In
July–August 2014, two contrasting ice edges in the Canadian High Arctic were
explored: a FYI-dominated ice edge in Barrow Strait and a MYI-dominated ice
edge in Nares Strait. Our results reveal two distinct planktonic systems and
associated DMS dynamics in connection to these diverging ice types. The
surface waters exiting the ponded FYI in Barrow Strait were characterized by
moderate chlorophyll a (Chl a, <2.1 µg L−1) as well as
high DMSP (115 nmol L−1) and DMS (12 nmol L−1), suggesting that a
bloom had already started to develop under the markedly melt-pond-covered
(ca. 40 %) FYI. Heightened DMS concentrations at the FYI edge were
strongly related to ice-associated seeding of DMS in surface waters and
haline-driven stratification linked to ice melt (Spearman's rank correlation
between DMS and salinity, rs=-0.91, p<0.001, n=20).
However, surface waters exiting the MYI edge at the head of Nares Strait
were characterized by low concentrations of Chl a (<0.5 µg L−1), DMSP (<16 nmol L−1), and DMS (<0.4 nmol L−1), despite the nutrient-replete conditions characterizing the
surface waters. The increase in autotrophic biomass and methylated sulfur
compounds took place several kilometers (ca. 100 km) away from the MYI edge,
suggesting the requisite for ice-free, light-sufficient conditions for a
phytoplankton bloom to fully develop and for sulfur compound dynamics to
follow and expand. In light of the ongoing and projected climate-driven
changes to Arctic sea ice, results from this study suggest that the early
onset of autotrophic blooms under thinner, melt-pond-covered ice may have
vast implications for the timing and magnitude of DMS pulses in the Arctic.
In my remembered country: what poetry tells us about the changing perceptions of volcanoes between the nineteenth and twenty-first centuries
Authors: Soldati Arianna , Illingworth Sam
Published: March 2020

Abstract. In this study we investigate what poetry written about volcanoes from the 1800s
to the present day reveals about the relationship between volcanoes and the
societies and times represented by poets who wrote about them, including how
it evolved over that time frame. In order to address this research question,
we conducted a qualitative content analysis of a selection of 34
English-language poems written about human–volcano interactions.
Firstly, we identified the overall connotation of each poem. Then, we
recognised specific emerging themes and grouped them in categories.
Additionally, we performed a quantitative analysis of the frequency with
which each category occurs throughout the decades of the dataset. This
analysis reveals that a spiritual element is often present in poetry about
volcanoes, transcending both the creative and destructive power that they
exert. Furthermore, the human–volcano relationship is especially centred
around the sense of identity that volcanoes provide to humans, which may
follow from both positive and negative events. These results highlight the
suitability of poetry as a means to explore the human perception of geologic
phenomena. Additionally, our findings may be relevant to the definition of
culturally appropriate communication strategies with communities living
near active volcanoes.
An intercomparison of tropospheric ozone reanalysis products from CAMS, CAMS interim, TCR-1, and TCR-2
Authors: Huijnen Vincent , Miyazaki Kazuyuki , Flemming Johannes , Inness Antje , Sekiya Takashi , Schultz Martin G.
Published: March 2020

Abstract. Global tropospheric ozone reanalyses constructed using different state-of-the-art satellite data assimilation systems, prepared as part of the
Copernicus Atmosphere Monitoring Service (CAMS-iRean and CAMS-Rean) as well as two fully independent reanalyses (TCR-1 and
TCR-2, Tropospheric Chemistry Reanalysis), have been intercompared and evaluated for the past decade. The updated reanalyses (CAMS-Rean and TCR-2) generally show substantially
improved agreements with independent ground and ozone-sonde observations over their predecessor versions (CAMS-iRean and TCR-1) for diurnal,
synoptical, seasonal, and interannual variabilities. For instance, for the Northern Hemisphere (NH) mid-latitudes the tropospheric ozone columns (surface to
300 hPa) from the updated reanalyses show mean biases to within 0.8 DU (Dobson units, 3 % relative to the observed column) with respect to the
ozone-sonde observations. The improved performance can likely be attributed to a mixture of various upgrades, such as revisions in the chemical data
assimilation, including the assimilated measurements, and the forecast model performance. The updated chemical reanalyses agree well with each other
for most cases, which highlights the usefulness of the current chemical reanalyses in a variety of studies. Meanwhile, significant temporal changes
in the reanalysis quality in all the systems can be attributed to discontinuities in the observing systems. To improve the temporal consistency,
a careful assessment of changes in the assimilation configuration, such as a detailed assessment of biases between various retrieval products, is
needed. Our comparison suggests that improving the observational constraints, including the continued development of satellite observing systems,
together with the optimization of model parameterizations such as deposition and chemical reactions, will lead to increasingly consistent long-term
reanalyses in the future.
ConvectiveFoam1.0: development and benchmarking of a infinite-Pr number solver
Authors: Lenzi Sara , Cerminara Matteo , de' Michieli Vitturi Mattia , Esposti Ongaro Tomaso , Provenzale Antonello
Published: March 2020

Abstract. We developed a new fluid-dynamical numerical model, which we call convectiveFoam, designed to simulate fluids with very large Prandtl number. First we implemented the high-Pr case, in which advection still acts explicitly, and then the Pr → ∞ version, where the momentum equation becomes diagnostic (that is, without time derivatives) and it is formalized as an elliptic problem. The new solver, based on a finite volume integration method, is developed on the OpenFOAM platform and it exhibits a good performance in terms of computational costs and accuracy of the results. Scaling properties show a maximum performance around 16000 cells/core, in agreement with other works developed on the same platform. A systematic validation of the solver was performed for both 2D and 3D geometries, showing that convectiveFoam is able to reproduce the main results of several iso-viscous cases. This new solver can thus simulate idealized configurations of natural geophysical convection, such as in the Earth Mantle where Pr = 1023. This solver represents a starting point for general exploration of the behaviour and parameter dependence of several fluid systems of geological interest.
Ability of the e-TellTale sensor to detect flow features over wind turbine blades: flow stall/reattachment dynamics
Authors: Soulier Antoine , Braud Caroline , Voisin Dimitri , Podvin Bérengère
Published: March 2020

Abstract. Monitoring the flow features over wind turbine blades is a challenging task that has become more and more crucial. This paper is devoted to demonstrate the ability of the e-TellTale sensor to detect the flow stall/reattachment dynamics over wind turbine blades. This sensor is made of a strip with a strain gauge sensor at its base. The velocity field was acquired using TR-PIV measurements over an oscillating 2D blade section equipped with an e-TellTale sensor. PIV images were post-processed to detect movements of the strip, which was compared to movements of flow. Results show good agreement between the measured velocity field and movements of the strip regarding the stall/reattachment dynamics.
Rossby number similarity of an atmospheric RANS model using limited-length-scale turbulence closures extended to unstable stratification
Authors: van der Laan Maarten Paul , Kelly Mark , Floors Rogier , Peña Alfredo
Published: March 2020

Abstract. The design of wind turbines and wind farms can be improved by increasing the accuracy of the inflow models representing the atmospheric boundary layer. In this work we employ one-dimensional Reynolds-averaged Navier–Stokes (RANS) simulations of the idealized atmospheric boundary layer (ABL), using turbulence closures with a length-scale limiter. These models can represent the mean effects of surface roughness, Coriolis force, limited ABL depth, and neutral and stable atmospheric conditions using four input parameters: the roughness length, the Coriolis parameter, a maximum turbulence length, and the geostrophic wind speed. We find a new model-based Rossby similarity, which reduces the four input parameters to two Rossby numbers with different length scales. In addition, we extend the limited-length-scale turbulence models to treat the mean effect of unstable stratification in steady-state simulations. The original and extended turbulence models are compared with historical measurements of meteorological quantities and profiles of the atmospheric boundary layer for different atmospheric stabilities.
Front Cover
Authors: Abeytunge Kawmadi
Published: March 2020

Marginalized and newcomer populations face unique challenges to optimizing health. From poverty and experienced trauma, to language barriers, social isolation and systemic injustices, there are numerous determinants of health that these patients may bear. This artwork aims to represent the many faces of newcomer and marginalized Canadians and display factors that may prevent these populations from accessing healthcare. Just as the faces in this piece are left ambiguous, the stories of each patient are also unknown upon first encounter. While the barriers patients experience may not always be evident, assessing and acknowledging these challenges is crucial to helping patients meet their healthcare needs.
Características acústicas y psicosociales de mujeres con voces hiperagudas
Authors: Nercelles Loreto , Vidal Joselyn , Molina Valeria , Ruz Karla , Taiba Carol , Tocornal Francisco
Published: March 2020

La voz hiperaguda en mujeres es un trastorno de la voz poco estudiado. El objetivo de esta investigación es establecer un perfil vocal de mujeres con voces hiperagudas y determinar las molestias psicosociales que puede desencadenar este síntoma comparándolo con mujeres con voz con frecuencia fundamental promedio. Mediante un diseño de casos y controles se estudió una muestra de 12 mujeres con frecuencia fundamental sobre los 250 Hz. y se comparó con 24 mujeres de rangos de frecuencia fundamental dentro de la norma (210-250 Hz.). Además, para valorar las molestias psicosociales se les aplicó una encuesta de evaluación de la muda vocal (PEMUV). Se encontraron diferencias significativas entre ambos grupos en el parámetro frecuencia fundamental en vocal /a/ (p=0.002), frecuencia fundamental en lenguaje automático (p=0.003), frecuencia fundamental en lenguaje espontáneo (p=0.002), jitter (p=0.05) y shimmer (0.00). Además, en el análisis de la encuesta, si existieron diferencias significativas en 12 de las 14 preguntas de este instrumento. Por último, se codificaron las respuestas de la pregunta abierta, evidenciándose alteraciones familiares, laborales, frustración y confusión de edad debido a la voz hiperaguda. La presente investigación logró establecer un perfil de las mujeres con voces hiperagudas. De acuerdo con los resultados obtenidos, las mujeres con voz hiperaguda, presentan valoración negativa de la voz, molestias a nivel emocional y social.
An Empirical Investigation of the Determinants of Firm Financial Performance
Authors: Wijeweera Albert , Rampling Peter , Eddie Ian
Published: March 2020

In this paper, we examine potential determinants of firm financial performance using data from 177 USA listed companies for three distinct periods; prior to GFC, during the GFC, and post GFC. Based on the literature we have selected a number of possible determinants and have categorized them into four different groups to facilitate the analysis. They are; (i) executive director and CEO remuneration and incentivisation factors, (ii) institutional ownership factors, (iii) board practice and diversity factors, (iv) remuneration committees and remuneration consultants’ factors. The market capitalisation (MCAP) is used as the dependent variable because actual profits and profit forecasts through continuous market disclosure have an immediate influence on share price, which in turn alters the MCAP of the respective company.Based on the results, the study concludes that for all three periods covered executive director and CEO remuneration variables are the most important determinants of financial performance of listed companies.
Case Study Method in Human Resource Development: Reviewing the Research Literature
Authors: Shiddike Mohammad Omar , Rahman Asif Ali
Published: March 2020

This paper is written with a novice social science (management, education, public administration, public policy, and human resource development etc.) researcher in mind at the graduate or doctoral level. A case study research design has been made in this paper for a human resource development (HRD) project after extensively reviewing the research literature. This paper is useful for researchers who are looking for a case study research design plan based on a real-world example that can be adapted to their specific research. The paper is based on a research titled, “Faculty Engagement in Professional Development: A Bangladesh Case Study”. It explains a rationale for the use of case study method in an HRD project, followed by the research questions, the research methods and procedures. The paper also debates on sampling issues, data types, research instruments, data organization and cleaning, data analysis using and issues of validity and reliability. The paper concludes with a discussion on limitations and delimitations.
A Paradox in Bland-Altman Analysis and a Binary Approach
Authors: Kim Steven B. , Wand Jeffrey O.
Published: March 2020

A reliable method of measurement is important in various scientific areas. When a new method of measurement is developed, it should be tested against a standard method that is currently in use. Bland and Altman proposed limits of agreement (LOA) to compare two methods of measurement under the normality assumption. Recently, a sample size formula has been proposed for hypothesis testing to compare two methods of measurement. In the hypothesis testing, the null hypothesis states that the two methods do not satisfy a pre-specified acceptable degree of agreement. Carefully considering the interpretation of the LOA, we argue that there are cases of an acceptable degree of agreement inside the null parameter space. We refer to this subset as the paradoxical parameter space in this article. To address this paradox, we apply a Bernoulli approach to modify the null parameter space and to relax the normality assumption on the data. Using simulations, we demonstrate that the change in statistical power is not negligible when the true parameter values are inside or near the paradoxical parameter space. In addition, we demonstrate an application of the sequential probability ratio test to allow researchers to draw a conclusion with a smaller sample size and to reduce the study time.
Body temperature of horses spending time in paddocks in various weather conditions during the summer
Authors: Janczarek Iwona , Wnuk - Pawlak Elżbieta , Wiśniewska Anna , Dziuban Dominika , Frątczak Martyna , Raś Barbara
Published: March 2020

The aim of the study was to determine the internal and surface temperature of selected body parts of horses during their stay in paddocks in various weather conditions in the summer. The study was conducted on 10 adult thoroughbred mares. The experiment was carried out on horses spending time in the paddock in four eight-hour stages with differing weather conditions in summer (sunny, cloudy, rainy and windy). Measurements of internal temperature (Veterinär SC 12 veterinary thermometer) and surface temperature of the head, rib area and croup (Thermal Imagers Ti9 FLUKE infrared camera and SmartView 4.1 software) were carried out at rest and again after four and eight hours in the paddock. It was concluded that the time horses spend in the paddock in summer should depend on weather conditions. Many hours spent outside the stable during sunny weather accompanied by high air temperature can contribute to overheating. On the other hand, rain and wind can cause hypothermia. Therefore, it is worth considering leaving horses in the stable or limiting their stay in the paddock to no more than four hours.
Uma extensão da UML para modelagem de contexto
Authors: Pedó Vivian , Costa Cristiano , Farias Kleinner
Published: March 2020

Um dos principais problemas da UML é a imprecisão para representar o conceito de contexto, além de ser rígida para incorporar novos modelos. Da mesma forma, as ferramentas de modelagem atuais não dão suporte à representação e à validação de modelos de contexto. Nesse âmbito, o trabalho propõe uma extensão da UML para modelagem de contexto, a qual visa não só permitir a representação e validação dos principais aspectos de contexto, como também desenvolver um ambiente de modelagem específico de domínio. Com isso, espera-se permitir uma modelagem mais adequada para o contexto, auxiliando no desenvolvimento de sistemas cientes de contexto.
Modelo para predição de ações e inferência de situações de risco em ambientes sensíveis ao contexto
Authors: Del Fabro Neto Alfredo , De Azevedo Bruno , Bouefleuer Rafael , Lima João Carlos , Augustin Iara
Published: March 2020

A atividade cotidiana humana pode ter um risco de dano associado para quem a está realizando. Este trabalho propõe uma abordagem para a predição de ações e detecção de situações de risco, baseando-se nas mudanças de contexto fisiol´gico provocadas por elas através do modelo Híperespaço Análogo ao contexto. Testes foram realizados para a predição de ações e obtiveram precisão de 78,69%, e para a detecção de situações de risco, precisão de 98,94%.
Predicting Routes and Destinations of Urban Trips using PPM Method
Authors: N. Neto Francisco , Baptista Cláudio , Campelo Cláudio
Published: March 2020

Information about destination and route that a person will take is important for various purposes, such as to prevent a user going through a congested route. However, an information system where users must explicitly input their intended destination seems not be useful for daily routines. Ideally, the system should be able to predict the destination and the route to be taken by a vehicle as soon as it starts to move. This paper presents a new technique to predict route and destination, based on Prediction by Partial Matching (PPM) compression method. By considering two important contextual information (day of week and time of departure), the results obtained by our approach were encouraging, reaching around 92% of accuracy rate.
CoIoT: Uma Arquitetura Distribuída para IoT Direcionada à Consciência de Contexto das Aplicações Ubíquas
Authors: Souza Rodrigo , Lopes João , Davet Patrícia , Gadotti Gizele , Yamin Adenauer , Geyer Cláudio
Published: March 2020

O advento da Internet das Coisas (IoT) através da crescente disponibilidade de sensores conectados a um meio de comunicação global, que é a internet, trouxe nova dimensão às pesquisas em consciência de contexto na Ubicomp. Neste sentido, a principal contribuição deste artigo consiste na proposição do CoIoT enquanto uma arquitetura para o gerenciamento proativo das interações do EXEHDA com o ambiente físico, através de regras, empregando redes de sensores e atuadores. Para avaliar as funcionalidades da arquitetura proposta, apresentamos um estudo de caso na área da agricultura, com destaque para os protótipos e testes realizados, cujos resultados se mostraram promissores.
Mahara como red social y portafolio digital en los nuevos contextos de formación inicial docente. Un estudio de casos
Authors: Muñoz González Laura de la Concepción , Soto Gómez Encarna
Published: March 2020

El objetivo de esta investigación es comprender las virtualidades y limitaciones de la red social y portafolio digital Mahara en la formación inicial docente. En los últimos años, los medios digitales, entre los que destacan las redes sociales, han incrementado su influencia en los distintos ámbitos de la vida cotidiana. Las aulas, ocupadas ya por nativos digitales, ponen de manifiesto la necesidad de incorporar en la educación herramientas que permitan transferir las funcionalidades que tanto nos atraen de las redes sociales (interactividad, sociabilidad, facilidad para crear espacios de intimidad, personalización y acceso a información ilimitada) al ámbito académico, especialmente en la formación del profesorado novel. Mahara parece favorecer el desarrollo de competencias docentes a través de la integración de lo formal y lo social. En este sentido, se ha llevado a cabo un estudio de casos conformado por un grupo de estudiantes de Educación Infantil de la Universidad de Málaga y su profesorado, quienes utilizan Mahara en varias asignaturas. El análisis y triangulación de los datos dio lugar a siete categorías emergentes que nos permiten conocer mejor las potencialidades y desafíos de la herramienta a través de la singularidad de lo que podría considerarse como una buena experiencia formativa.

The objective of this research is to understand the virtualities and limitations of the Mahara social network and digital portfolio in initial teacher training. In recent years, digital media, among which social networks stand out, have increased their influence in different areas of daily life. The classrooms, already occupied by digital natives, highlight the need to incorporate into education tools that allow transferring the functionalities that attract us so much from social networks (interactivity, sociability, ease to create spaces of intimacy, personalization and access to information unlimited) to the academic field, especially in the training of new teachers. Mahara seems to favor the development of teaching competencies through the integration of the formal and the social. In this sense, a case study has been carried out consisting of a group of students of Early Childhood Education of the University of Malaga and its teaching staff, who use Mahara in various subjects. The analysis and triangulation of the data gave rise to seven emerging categories that allow us to better understand the potential and challenges of the tool through the uniqueness of what could be considered as a good teacher training experience.
Percepciones de estudiantes y docentes del uso que los estudiantes hacen de Internet y su relación con la modalidad de estudio
Authors: Valencia-Ortiz Rubicelia , Garay Urtza , Cabero-Almenara Julio
Published: March 2020

Internet y las redes sociales se han convertido en las tecnologías estrella entre los estudiantes actuales. En cambio, todavía hay pocos estudios sobre el uso y percepción que el alumnado hace de ellas. Incluso, es difícil encontrar comparaciones entre las percepciones sobre el uso que realizan los estudiantes desde el punto de vista del profesorado y del mismo alumnado. El objetivo de este trabajo es profundizar en las diferencias entre las percepciones del profesorado y los estudiantes respecto a los usos de internet y redes sociales que estos últimos realizan. La muestra está conformada por 17 600 alumnos y 1 498 docentes de la Ciudad de México. Se realizó un estudio exploratorio y ex post-facto, mediante el instrumento de recogida de datos “Social Media Addiction Scale-Studen Form”. Entre los resultados destaca la diferencia entre la percepción de uso que presenta el alumnado y la que tiene el profesorado. Además, son los estudiantes que cursan sus estudios a distancia los que más utilizan las redes para su proceso de aprendizaje. Estos resultados sugieren la necesidad de tomar medidas educativas para intensificar el uso formativo de internet y las redes sociales entre el alumnado.

Internet and social media have become so trend tech activity among the current students. On the other hand, there are still few studies about the usage and the perceptions students have about them. It is even harder to find some comparisons between the perception of the students and the professors in this topic. The purpose of this work is to deepen into the existent differences between the students and teachers perceptions referred to the Internet and social media usage. The sample gathered 17600 students and 1498 teachers within Mexico City. The study was made to explore and post-facto as well, using data form from "Social Media Addiction Scale-Student Form". The results emphasized the difference between the perception of usage for students and for teachers. Students who work their curricula on line, use the internet for their learning process. These results suggest the need to apply educative dictations to intensify the formative use of internet and social media in the student´s environment.
A vueltas con lo real: formas del «efecto documental» en el cine contemporáneo
Authors: Marzal-Felici Javier , Casero-Ripollés Andreu
Published: March 2020

Editorial del número 19.
Los profesionales de las relaciones públicas como knowmads: una visión desde la academia, los profesionales y estudiantes en Ecuador
Authors: Gómez Navas Juan Sebastián , Robalino Corella Paola Belén , Sánchez de Nordenflych Jorge
Published: March 2020

El siguiente estudio introspectivo analiza la ideología knowmad vinculada a los profesionales de las relaciones públicas desde la perspectiva de académicos, profesionales y estudiantes de pregrado en relaciones públicas. Se analizan los aportes, tensiones y desafíos que surgen respecto a la ideología y se comparan características del perfil de los knowmads con el perfil profesional del relacionista. Para la recolección de la información se emplearon técnicas cualitativas y cuantitativas: entrevistas dirigidas a académicos ecuatorianos —expertos en relaciones públicas—; grupo de discusión con relacionistas titulados —profesionales—, vinculados a diversos sectores laborales; y finalmente una encuesta a estudiantes recurrentes de la carrera de Relaciones Públicas de la Universidad UTE —Quito, Ecuador—. Se concluye que es fundamental la proyección de los profesionales y estudiantes de relaciones públicas como knowmads, con el fin de rescatar a la profesión en toda su dimensión, haciendo frente a nuevos retos y requerimientos en un entorno cambiante y, sobre todo, competitivo. También se demuestra que varias características de los knowmads encajan directamente con estos comunicadores, validando la importancia de esta ideología para el futuro de la profesión.
Las narrativas expandidas a través del product placement inverso: el caso de las zapatillas NikeMAG
Authors: Álvarez Rodríguez Víctor
Published: March 2020

El sector de la publicidad cuenta con una constante evolución de sus métodos en busca de una relación más directa entre la marca y el público objetivo. Una de las herramientas comunicativas que ha favorecido esa evolución es el product placement inverso, una forma de emplazamiento de producto que recrea marcas de ficción en el mundo real. Es una herramienta que apenas cuenta con unas décadas de desarrollo. Sin embargo, se trata de una técnica inexplorada en el mundo académico y que necesita de una ordenación teórica. Por esta razón, en esta investigación se busca estudiar esta práctica publicitaria con el objetivo de analizar el tratamiento y posibilidades de comunicación que es capaz de ofrecer. Para ello, se ha tomado como muestra a uno de sus casos históricos más relevantes. En concreto, el caso de las zapatillas NikeMAG de Regreso al Futuro 2 (1989). Para su realización se ha elaborado un análisis cualitativo de la información bibliográfica recabada así como de las declaraciones exclusivas para este artículo de Chris Dukeminier, Global Brand Director de NikeSB. Los resultados obtenidos estructuran los procesos y las relaciones desarrolladas con el público al materializar estas marcas desde sus narrativas originales. Se trata de una investigación que reflexiona sobre la concepción transmedia de este tipo de proyectos tomando como muestra un ejemplo de proyección internacional que ilustra el uso de esta herramienta publicitaria de cara al futuro.
Diferentes estrategias en Twitter de los principales líderes políticos españoles en las elecciones generales de 2019 (28A)
Authors: Martínez Juan Vicente , Marqués Pascual Joaquín
Published: March 2020

El objetivo de este trabajo es explorar el uso que hicieron de Twitter los cuatro principales líderes políticos españoles durante la campaña de las elecciones generales españolas desarrollada entre el 12 y el 26 de abril del 2019. Se analizó su timeline, tanto cuantitativo (de su participación), como cualitativo (categorizando el tono, la orientación o la temática abordada). El corpus de este estudio está compuesto por un total de más de 700 contenidos cuyos resultados evidencian: 1) la existencia de una estrategia de comunicación política en Twitter; 2) la interacción y dinamización del diálogo con diferentes estrategias e intensidad; 3) la autopromoción a través del propio texto, material audiovisual y enlaces compartidos con el ánimo de potenciar, principalmente, actividades propias de campaña; 4) un alto porcentaje de mensajes que no se corresponden con las preocupaciones de su público objetivo, aunque con diferencias existentes entre los candidatos. Queda demostrada la existencia de un uso estratégico de Twitter en el que aún existe un amplio margen para explotar el potencial interactivo y cuyo contexto electoral ha girado en torno a un monólogo promocional más próximo a sus agendas temáticas que a los temas de interés de su electorado.
RENAISSANCENS HIEROGLYFSTUDIER
Authors: Iversen Erik
Published: March 2020

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CAMOUFLEREDE ILLEGALE TRYK
Authors: Tønnesen Helge
Published: March 2020

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HARALD MORTENSEN OG HANS BOGSAMLING
Authors: Paulli R. , Dal Erik
Published: March 2020

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ET FRANSK MUSIKHÅNDSKRIFT FRA BEGYNDELSEN AF DET 16. ÅRHUNDREDE
Authors: Glahn Henrik
Published: March 2020

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NYE INKUNABLER I DET KONGELIGE BIBLIOTEK V
Authors: Dal Erik
Published: March 2020

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AMBROSIUS LOBWASSER I DANMARK
Authors: Schiørring Nils
Published: March 2020

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SILHOUETTØREN FRA ST. PEDERSTRÆDE
Authors: Ochsner Bjørn
Published: March 2020

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NYFUNDNE ELDRE DANICA I OSLO
Authors: Tunold Solveig
Published: March 2020

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HVEM ER KUNSTNEREN? - SPØRG AMORINEN!
Authors: P. ROHDE H.
Published: March 2020

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H. C. ANDERSENS BREVE TIL FREDERIK OG LUDVIG LÆSSØE
Authors: Topsøe-Jensen H.
Published: March 2020

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SILHOUETTØREN ERNST LJUNGH I FIRSERNES KØBENHAVN
Authors: Ochsner Bjørn
Published: March 2020

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HISTORIEN OM PONTOPPIDANS „FORKLARING" I DANMARK OG NORGE
Authors: Brøndsted Mogens
Published: March 2020

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EFTERSLÆT TIL TIDLIGERE ÅRGANGE
Authors: Redaktionen -
Published: March 2020

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PHILIPSEN OG SALTHOLMEN
Authors: P. ROHDE H.
Published: March 2020

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EVNER KONTRA KARAKTER
Authors: VOGEL-JØRGENSEN T.
Published: March 2020

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JENS LOLLE
Authors: Lunn Sven
Published: March 2020

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GEORG BRANDES PÅ KINESISK
Authors: Hermann Jensen Christian
Published: March 2020

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SUMMARIES
Authors: Nørgaard Holger
Published: March 2020

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AF MACHIAVELLIS HISTORIE I DANMARK
Authors: Ilsøe Harald
Published: March 2020

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J. WASSERSCHLEBE OG DET KGL. BIBLIOTEK
Authors: Birkelund Palle
Published: March 2020

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JOHAN THOMAS LUNDBYE I ROM OG FIRENZE
Authors: L. Faaborg N.
Published: March 2020

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DET TIDLIGSTE DANSKE TILLØB TIL LIVSFORSIKRING
Authors: Rise Hansen C.
Published: March 2020

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TRÆSNIT I EEN FARVE TRYKT MED TO STOKKE
Authors: Ochsner Bjørn
Published: March 2020

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SØREN KIERKEGAARD'S DIARY OF THE SEDUCER:
Authors: R. Dewey Bradley
Published: March 2020

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STAMBØGER FRA DET 16. ÅRHUNDREDE I DET KONGELIGE BIBLIOTEK
Authors: Helk Vello
Published: March 2020

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DA HENRIK PONTOPPIDAN BLEV STRØGET PÅ FINANSLOVEN
Authors: Bredsdorff Elias
Published: March 2020

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DET KONGELIGE BIBLIOTEKS PORTRÆTSAMLING OG JUSTITSRÅD A. STRUNK
Authors: L. Faaborg N.
Published: March 2020

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AAGE MADELUNGS BREVVEKSLING MED ALEKSEJ REMIZOV OG VALERIJ BRJUSOV
Authors: Alberg Jensen Peter , Ulf Møller Peter
Published: March 2020

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GEORG BRANDES OG PETER NANSEN OMKRING 'VERDENSKRIGEN'
Authors: Düring Jørgensen Jesper
Published: March 2020

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R. PAULLI
Authors: Birkelund Palle
Published: March 2020

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TO NYERHVERVEDE BYZANTINSKE MUSIKHÅNDSKRIFTER
Authors: Raasted Jørgen
Published: March 2020

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ARSENIK OG GAMLE HÅNDSKRIFTER
Authors: Kirketerp-Møller Hertha
Published: March 2020

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EN AMERIKANSK VISIT HOS H. C. ANDERSEN
Authors: Juel Møller Svend
Published: March 2020

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LØJTNANT BILLE PÅ PRØVESTENEN
Authors: Feldbæk Ole
Published: March 2020

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DYSMORFISMEDEBATTEN
Authors: Abildgaard Hanne
Published: March 2020

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VIDENSKABSMANDEN OG BRYGGEREN
Authors: Glamann Kristof
Published: March 2020

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KRITIKEREN BAG MASKEN
Authors: Nolin Bertil
Published: March 2020

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Noter samt oversættelser af de fremmedsprogede artikler
Authors: Redaktionen -
Published: March 2020

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Om fotografiens vej til accept og anerkendelse som kunstart i Danmark
Authors: Poulsen Tage
Published: March 2020

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Kvinders fotografi
Authors: Hansen Tove
Published: March 2020

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From the King's Peaceful Copenhagen
Authors: Ann Davis Lynn
Published: March 2020

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Arkæologisk fotografering og flyvning
Authors: Stiesdal Hans
Published: March 2020

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NYE INKUNABLER I DET KONGELIGE BIBLIOTEK
Authors: Einersen Henning
Published: March 2020

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DEN LILLE IDAS BLOMSTER
Authors: Topsøe-Jensen H.
Published: March 2020

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DE SYMPATISKE HAVMÆND
Authors: Meisling Peter
Published: March 2020

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MACHIAVELLIS ARTE DELLA GUERRA OG ANDRE MILITÆRBØGER I DE DANSKE KONGERS BIBLIOTEK
Authors: Bøgh Knud
Published: March 2020

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HOLBERG OG DIE EUROPÄISCHE FAMA
Authors: Eegholm-Pedersen Sv.
Published: March 2020

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SALVATOR FABRIS
Authors: MIGLIORATO GIUSEPPE
Published: March 2020

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FILOSOFFER PÅ KRIGSSTIEN
Authors: Henrik Kogh Carl
Published: March 2020

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"BYZANS EFTER BYZANS"
Authors: Schartau Bjarne
Published: March 2020

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DANSKE BOGSAMLERE OG SPANIEN
Authors: Bøgh Knud
Published: March 2020

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OM FORFATTERNE
Authors: Redaktionen -
Published: March 2020

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'CLANDESTINI VENEZIANI' IN THE ROYAL LIBRARY
Authors: Lowry Martin
Published: March 2020

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DE „SMÅ HISTORIER" OG LÆSEREVOLUTIONEN I 1700-TALLET
Authors: Horstbøll Henrik
Published: March 2020

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KOBBERSTIKKER G.L.LAHDES STAMBØGER
Authors: Helsted Dyveke
Published: March 2020

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STAMBOGSSTUDIER
Authors: Helk Vello
Published: March 2020

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BALLETMESTERENS BIBLIOTEK
Authors: Arne Jurgensen Knud
Published: March 2020

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LATINDIGTEREN ZACHARIAS LUND (1608-1667)
Authors: Skafte Jensen Minna
Published: March 2020

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SIGNE TOKSVIG
Authors: Pihl Lis
Published: March 2020

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EN ARKIVTEGNEMESTER PÅ REJSE ARKIVTEGNEMESTER SØREN ABILDGAARD
Authors: Høgsbro Kirsten-Elizabeth
Published: March 2020

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ET MAGAZIN FOR KUNSTNERE OG HAANDVÆRKERE
Authors: F. Wagner Michael
Published: March 2020

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MAGNUS FRISIUS MP.'
Authors: Ilsøe Harald
Published: March 2020

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GYLDENDALS BIBLIOTHEK FOR HJEMMET EN HALVGLEMT KULTURINDSATS
Authors: Nielsen Torben
Published: March 2020

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„FLUGTEN AF KLOSTERET" ET MISHANDLET MOZART-PARTITUR
Authors: Sørensen Inger
Published: March 2020

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BOGBINDSUNDERSØGELSER I DET KGL. BIBLIOTEKS SAMLINGER
Authors: Ilsøe Ingrid
Published: March 2020

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ENDNU TRETTEN INKUNABLER I DET KONGELIGE BIBLIOTEK
Authors: Budde Susanne , Ilsøe Ingrid
Published: March 2020

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DANSK ARABISTIK OG ISLAMFORSKNING I DET 17.-19. ÅRHUNDREDE HOVEDTRÆK BIBLIOGRAFISK BELYST
Authors: T. Rasmussen Stig
Published: March 2020

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PRÆSENTATION
Authors: Redaktionen -
Published: March 2020

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GEORG ENGELHARD LÖHNEYSEN FRA DEN SKREVNE BIDBOG TIL DEN TRYKTE RIDEBOG
Authors: Düring Jørgensen Jesper
Published: March 2020

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LYSAVLEDE FULDTEGNINGER FOTOGRAFI, KUNST OG NATURVIDENSKAB I DANMARK 1839-40
Authors: Berner Marie-Louise
Published: March 2020

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OTTO THOTTS ORIENTALSKE HÅNDSKRIFTER IDENTIFICERET PÅ GRUNDLAG DET KGL. BIBLIOTEKS ARKIV E 63
Authors: Rasmussen Stig T.
Published: March 2020

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KULTURPOLITIK I DET BESATTE LAND DET TYSKE VIDENSKABELIGE INSTITUT I KØBENHAVN 1941 TIL 1945*
Authors: Jakubowski-Tiessen Manfred
Published: March 2020

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ECHOES OF SKALDIC MUSIC IN SAXO
Authors: Christensen Louis
Published: March 2020

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1658 - ET ÅR AF JENS BIRCHERODS DAGBØGER
Authors: Chr. V. Johansen Jens
Published: March 2020

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KARIN MICHAËLIS OG TYSKLAND
Authors: S. Nielsen Birgit
Published: March 2020

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NAZISTISK PLAKATPROPAGANDA I DANMARK 1930-45
Authors: T. Lauridsen John
Published: March 2020

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ÆLDRE DANSKE BOGTRYKKER- OG FORLÆGGERMÆRKER II
Authors: Haugsted Mogens
Published: March 2020

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K. KROMAN, J.N. MADVIG OG GEORG BRANDES
Authors: Hansen Valdemar
Published: March 2020

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MED MOZART OG HANS SØSTER I SALZBURG MAJ 1780
Authors: Olsen Kåre
Published: March 2020

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ZENOKORTET
Authors: Kejlbo Ib
Published: March 2020

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KARL LARSEN OG ERICH MARIA REMARQUE
Authors: Düring Jørgensen Jesper
Published: March 2020

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FRAGMENTS OF FEMINISM IN HANNA SHEEHY SKEFFINGTON AND SIGNE TOKSVIG
Authors: Pihl Lis
Published: March 2020

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KONGTRULS FEM SAMLINGER EN OVERSIGT
Authors: Burchardi Anne
Published: March 2020

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EMIL TELMÁNYIS TILFØJELSER I CARL NIELSENS VIOLINKONCERT OG FLØJTEKONCERt
Authors: Flensborg Petersen Kirsten
Published: March 2020

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DANSKE KOMPONEREDE BIND ca. 1860-1877 BIDRAG TIL EN PRÆSENTATION
Authors: Ilsøe Harald
Published: March 2020

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WASSERSCHLEBE-WIEDEWELT En brevveksling
Authors: Lund Hakon
Published: March 2020

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HOVEDLINJER I DE DANSKE KLASSISKE STUDIERS HISTORIE EN KVANTITATIV UNDERSØGELSE
Authors: Gorm Andersen Flemming
Published: March 2020

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FRA BYBUD TIL RIGSBIBLIOTEKAR FHV. RIGSBIBLIOTEKAR TORKIL OLSEN 1922-2001
Authors: Kolding Nielsen Erland
Published: March 2020

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TILLÆG 4
Authors: Redaktionen -
Published: March 2020

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Nytilkomne monografier og artikler
Authors: Redaktionen -
Published: March 2020

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CONFIRMATIO FRATRUM PER MANUUM APPOSITIONEM
Authors: Kongsted Ole Kongsted
Published: March 2020

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MELLEM DESPOTI OG DEMOKRATI
Authors: Horstbøll Henrik
Published: March 2020

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CARL NIELSEN - MERE END MUSIK
Authors: Fellow John
Published: March 2020

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HENRIK RUNG - 'A FEELING FOR MUSIC LIBRARIES'*
Authors: Bergsagel John
Published: March 2020

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A NEW INTERPRETATION OF GUAMAN POMA'S CALCULATIONS ON THE TITLE PAGE OF THE NUEVA CORÓNICA Y BUEN GOBIERNO
Authors: Boserup Ivan
Published: March 2020

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OM MANUSKRIPTET CODEX ARABICUS CXIV FRA DET KONGELIGE BIBLIOTEKS SAMLING
Authors: Provencal Philippe
Published: March 2020

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Ulf Haxen: Det lille mirakel. Jødisk bogkunst i tusind år. Gyldendal 2003. 360 s., inkl. litteraturliste, ordforklaringer og indices; rigt illustreret.
Authors: Jansson Eva-Maria
Published: March 2020

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MEDELTIDA DANSKA BOKBAND I DET KONGELIGE BIBLIOTEKS SAMLING EN PRELIMINÄR UNDERSÖKNIN
Authors: Magdalena Lindskog Midtgaard Anna
Published: March 2020

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ÆLDRE DANSKE BOGTRYKKER- OG FORLÆGGERMÆRKER III
Authors: Haugsted Mogens
Published: March 2020

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PHYSIONOTRACIEN OG DENS UDØVERE
Authors: H. Clementsen O.
Published: March 2020

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OBERST FR. THORKELIN OG HANS GRUNDTVIGSAMLING
Authors: Dal Erik
Published: March 2020

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DEN LÆRDE LANDSDOMMER CHRISTIAN HERMANN HELWERSKOV OG HANS MANUSKRIPTER
Authors: E. Tang Kristensen Johs.
Published: March 2020

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D. G. MOLDENHAWERS KATALOG
Authors: Johs. Jensen Povl
Published: March 2020

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BIBLIOTEKET I DREJERS KLUB
Authors: M. Mitchell P.
Published: March 2020

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DET STORE KONGELIGE BIBLIOTEK
Authors: Bruun Kr.
Published: March 2020

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OM SØREN KIERKEGAARD SOM BOGSAMLER
Authors: P. ROHDE H.
Published: March 2020

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HEBRAISKE BØGER MED SØLVBIND
Authors: Edelmann R.
Published: March 2020

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FRA EN DIGTERS VÆRKSTED
Authors: Topsøe-Jensen H.
Published: March 2020

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Long-term landscape dynamics in the depopulated Carpathian Foothills: A Wiar River basin case study
Authors: Affek Andrzej Norbert , Zachwatowicz Maria , Solon Jerzy
Published: March 2020

Recently, marginal lands have been attracting attention as areas of high cultural and natural value that are undergoing profound, uncontrolled transformations. These changes are seen as a threat to the cohesion and identity of existing landscapes. However, ongoing processes are often difficult to interpret and evaluate without a long-term historical perspective. Here, we focused on understanding the long-term landscape dynamics in the depopulated and economically marginalized Wiar River basin, where 87% of inhabitants were displaced after World War II. A detailed, spatially explicit land-cover analysis based on eight series of topographic data (dating from 1780 to 2017), in line with the review of archival sources and literature, allowed us for identification of patterns and drivers of change. We linked the driving forces and the resulting landscape properties to four distinct historical periods (i.e. pre-industrial, industrial, socialist, and free-market). We demonstrated how the landscape of 25 villages, dominated for centuries by open farmland, shifted after WWII into extensively forested, and that not all regions in Europe follow the pattern of increasing rate of land-cover change.
Carlos Ulloa
Authors: Córcoles César , Rodríguez René
Published: March 2020

Carlos Ulloa es el creador de Papervision3D, un motor 3D para Flash. En esta entrevista, este diseñador/desarrollador español nos cuenta cómo lo que empezó como un proyecto personal se ha convertido en un proyecto colectivo y de código abierto con el objetivo común de ver la Web en tres dimensiones.
Aprendiendo a programar en Flash
Authors: Gil Jaume
Published: March 2020

Jaume Gil presenta una serie de recomendaciones para todos aquéllos que quieran aprender a programar en Flash. Para Gil, el conocimiento del entorno de trabajo de Flash y del lenguaje de programación ActionScript son los elementos indispensables para iniciarse en esta herramienta multimedia.