bluuebunny/crossref_metadata_2025 huggingface dataset:
La entrevista política ante el sesgo audiovisual. El caso de Los desayunos de TVE (2018)
Authors: Sánchez-Castillo Sebastián , Galán-Cubillo Esteban , Gifreu-Castells Arnau
Published: January 2021

En esta investigación se discute el posible sesgo en el desarrollo de las entrevistas televisivas a líderes políticos. Se considera que el proceso narrativo audiovisual y la puesta en escena, responsabilidad del equipo de realización, puede tener un papel decisivo en la neutralidad de las entrevistas. Se analiza el tratamiento audiovisual otorgado por la televisión pública española TVE durante el programa Los desayunos de TVE a los principales líderes políticos españoles, Pedro Sánchez, Pablo Iglesias, Albert Rivera y Mariano Rajoy y a sus colaboradores más cercanos, Adriana Lastra, Pablo Echenique, Fernando de Páramo y Fernando Martínez-Maillo, durante 2018. Durante las entrevistas analizadas se han descubierto narrativas audiovisuales dirigidas desde el equipo de realización del programa capaces de condicionar la imparcialidad de la entrevista. Se discute si el tratamiento audiovisual otorgado a cada uno de los líderes políticos es homogéneo, siendo las localizaciones y escenografías similares. Los resultados evidencian que los distintos líderes políticos no han tenido las mismas condiciones o tratamiento narrativo en la realización audiovisual, por lo que no se han enfrentado a las mismas amenazas implícitas en las preguntas que componen las entrevistas analizadas.
Breves encuentros: el cortometraje como esencia del cine [Reseña]
Authors: McGowan Nadia
Published: January 2021

Nuevos márgenes del cortometraje es una investigación multidisciplinar y con enfoques diversos sobre la situación del cortometraje en el panorama audiovisual mundial. Los tres autores abordan desde tres líneas distintas de la industria cinematográfica la creación en el formato breve. Sus conclusiones indican que es un estímulo para la animación, el documental y nuevas formas de publicidad como el branded content.
Manual de gestión de la comunicación corporativa [Reseña]
Authors: Civila Sabina
Published: January 2021

Con la situación actual, el público se mueve principalmente por Internet, provocando que se busque la diferenciación a través de las experiencias más que por la venta. El Manual de gestión de la comunicación corporativa es un texto académico en el que se exponen los nuevos retos de las organizaciones en esta área.  En este sentido, es de gran importancia el desarrollo de estrategias de identidad de marca para que la percepción de las audiencias sea positiva.
La investigación sobre series de televisión españolas de ficción. Un estudio de revisión crítica (1998-2020)
Authors: Mateos-Pérez Javier
Published: January 2021

This review paper  assesses academic articles published about Spanish fictional television series in scientific journals indexed in multidisciplinary databases: Web of Science (WoS), Scopus and Dialnet between 1998 and 2020. A combined quantitative and qualitative method of analysis based on the SALSA Framework was used,  in order to build a systematic bibliographic review. The results showed that the most common studies were those about the representation proposed in the fictional series about certain groups or social settings. Other approaches referred to the development of television fiction genres, adaptations, as well as to audiences and how audiences had received the series. Innovative research pointed  to the emerging themes of transmediality, participatory audiences, hybrid studies that explained the content from production and authorship, and feminist works. Among the gaps noted were approaches that addressed the audiovisual language and the aesthetics of television fiction as research opportunities.
Nuevas formas de comunicación de la radio: la investidura de Pedro Sánchez 'radiada' en Instagram
Authors: De-Sola-Pueyo Javier , Nogales-Bocio Antonia-Isabel , Segura-Anaya Ana
Published: January 2021

La evolución de la radio en los últimos años ha derivado en una creciente presencia y utilización de las redes sociales como canal de comunicación con sus audiencias y la aparición de nuevas narrativas. Esta investigación explora el tratamiento que las cuatro principales cadenas radiofónicas españolas -SER, COPE, Onda Cero y Radio Nacional de España- realizaron en Instagram durante la investidura de Pedro Sánchez como presidente del Gobierno de España. Del análisis de contenido cuantitativo y cualitativo realizado se deriva que la implantación de la radio en Instagram es, todavía, incipiente en algunos casos, pero que, sin embargo, cadenas como SER y COPE ya aplican nuevas narrativas en la red social. La radio emplea Instagram para informar y también como espacio para los géneros opinativos, y lo hace con un impacto notable en las comunidades de seguidores.
Megaciudades iberoamericanas en los medios internacionales. Protagonismo global y cambio climático
Authors: Calvo-Rubio Luis-Mauricio , Ufarte-Ruiz María-José
Published: January 2021

Esta investigación analiza la presencia de las megaciudades iberoamericanas en los medios de comunicación digitales extranjeros en el campo específico del cambio climático. El objetivo es determinar el uso de este canal para influir en la opinión pública y en órganos de decisión. Para ello, se estudia la representación de 30 ciudades iberoamericanas en textos periodísticos relacionados con el cambio climático en los medios digitales de mayor penetración (Spiegel, 20Minuten, DR News Het Laatste Nieuws) en los países que albergan algunas de las principales instituciones de gobernanza global en asuntos medioambientales: la Convención Marco de las Naciones Unidas sobre el Cambio Climático (Alemania), el Grupo Intergubernamental de Expertos sobre el Cambio Climático (Suiza), la Agencia Europea de Medio Ambiente (Dinamarca) y la Dirección General Climate Action de la Comisión Europea (Bruselas). Los resultados evidencian el escaso protagonismo que acaparan y que la organización de grandes eventos es el mecanismo más efectivo para ocupar espacio mediático. Estas conclusiones coinciden con los resultados obtenidos para cuatro redes de ciudades: C40, Eurocities, Ciudades y Gobiernos Locales Unidos y 100 Resilient Cities.
Cultura, tecnología y urbanismo: las bases para construir una ciudad global. El caso Málaga
Authors: Castro-Higueras Antonio , Pérez-Rufí José-Patricio
Published: January 2021

Las ciudades globales se han constituido como importantes nodos de concentración de poder político y económico. En este artículo partimos de la premisa de que las ciudades creativas y emergentes son el paso previo a la consideración de ciudad global. Además ponemos el foco en los denominados agentes adaptadores que promueven y favorecen conductas colectivas. Para abordar el fenómeno hemos estudiado un caso concreto: la ciudad de Málaga. El objetivo principal de la investigación es determinar si Málaga se ha convertido en una ciudad emergente, a partir de configurarse como ciudad cultural y creativa, y está en disposición de considerarse ciudad global en un futuro próximo. Un segundo objetivo es analizar el papel del Ayuntamiento de Málaga como agente adaptador responsable, en parte, de las dinámicas de la ciudad. Para ello empleamos el método del estudio de caso mediante la revisión sistemática de fuentes secundarias en relación a la evolución sufrida por la ciudad en las últimas dos décadas. Los resultados obtenidos confirman a Málaga como ciudad cultural y creativa y la sitúan dentro de las ciudades emergentes. Como conclusión podemos señalar el papel director y estratégico desempeñado por el Ayuntamiento de Málaga en el desarrollo experimentado por la ciudad.
Cobertura en la prensa europea de la adaptación de las ciudades a las olas de calor y al cambio climático
Authors: Jiménez-Gómez Isidro , Martín-Sosa-Rodríguez Samuel
Published: January 2021

Las ciudades europeas están sufriendo en los últimos años intensas olas de calor, favorecidas por el cambio climático. La ciudad es a la vez uno de los grandes contribuyentes a las emisiones de gases de efecto invernadero pero también un espacio clave para la adaptación y mitigación del cambio climático. Este estudio aborda de qué forma las ciudades europeas son representadas en 393 noticias periodísticas sobre las olas de calor sufridas durante los meses de junio de 2017 y 2019.  Para ello se analiza la cobertura de 19 periódicos de Francia, Reino Unido, Italia, Portugal y España. Los resultados señalan que el país es la variable más determinante en la rigurosidad y profundidad del tratamiento periodístico, seguido por la orientación ideológica, la sección del medio y la autoría. Las noticias sobre las olas de calor en la ciudades europeas que tratan aspectos técnicos como el efecto Isla de Calor Urbana son las que mejor abordan las medidas estructurales de adaptación y mitigación.
Los géneros narrativos audiovisuales como fuente de "inspiración" [Reseña]
Authors: Rebollo-Bueno Sara
Published: January 2021

Géneros narrativos audiovisuales en publicidad hace un recorrido por los diferentes géneros narrativos audiovisuales, pasando por las obras más destacadas y sus marcas de género. La obra es esencial para explicar la instrumentalización de los géneros narrativos en el proceso de creación publicitario.
La publicación científica, un acto de responsabilidad compartida [Editorial]
Authors: Tur-Viñes Victoria
Published: January 2021

La publicación de un texto en una revista científica implica la convergencia de responsabilidades diversas procedentes de todos los agentes involucrados en el proceso. La revista, su equipo editorial, tiene la responsabilidad de gestionar los textos en tiempo y forma, mantener el foco temático, identificar los textos que encierran aportación, posicionar adecuadamente la revista en bases de datos/repositorios y preservar el rigor del proceso de revisión, seleccionando a personas revisoras competentes. Editores y editoras también deben informar puntualmente, en cada momento del proceso, a quienes tienen la autoría y motivar las decisiones de forma constructiva y respetuosa. Quienes revisan tienen la responsabilidad de comunicar su compromiso lo antes posible para no incurrir en dilaciones injustificadas y hacer informes de revisión desde la más estricta asepsia emocional (manteniendo la distancia idónea), orientando las mejoras factibles del texto y aportando las indicaciones precisas, necesarias para su implementación, siempre desde el rigor y el mayor de los respetos. La tríada de actores debe observar los principios éticos de publicación.
Ciudades globales, Agenda 2030 y cambio climático como transformadores de la comunicación política internacional [Editorial]
Authors: Manfredi-Sánchez Juan-Luis , Pizarro Marcela , Espiñeira-Guirao Tamara , Brown Robin
Published: January 2021

La ciudad se ha convertido en la unidad de medida preferente para el estudio de la innovación, la transformación social y la acción política, también al nivel internacional. La arquitectura y el urbanismo, la comunicación y el liderazgo político, los movimientos sociales, los negocios y la economía, la transformación digital, la movilidad, el turismo de masas, el patrimonio, las políticas públicas, la expresión de identidades encuentran acomodo en los espacios urbanos. De hecho y de derecho, las ciudades desarrollan acciones de impacto transnacional y de consecuencias diplomáticas, políticas y comunicativas. La ciudad participa en la gestión de los asuntos internacionales donde procura impulsar su propia agenda política. Así, la ciudad es fuente de creatividad en la práctica de la comunicación internacional. Las ciudades que aspiran a ser globales han entendido que su valor reside en la capacidad de conjugar poder y población, dar continuidad a las políticas públicas y crear capital simbólico a través de las iniciativas directas y las experiencias mediadas por los medios de comunicación y cultura. Así se crea capital simbólico, que configura el imaginario de las ciudades globales.
Pertenecer y diferenciarse. Iglesias «locales» y agencia campesina en el noroeste de la Península Ibérica
Authors: Quirós Castillo Juan Antonio
Published: January 2021

El objetivo de este trabajo es analizar las sociedades locales altomedievales del noroeste peninsular a partir de sus iglesias propias. La existencia de iglesias privadas fundadas por colectivos y líderes aldeanos de distinta entidad es bien conocida tanto a través de la documentación escrita como de la evidencia material. Estas construcciones han sido estudiadas desde el prisma de la emergencia de líderes aldeanos y élites locales que se proyectan hacia el exterior mediante la participación en redes clientelares vinculándose con los poderes de escala territorial. En este trabajo se pretende explorar las sociedades locales como espacios de participación, confrontación y negociación inter y extracomunitaria a través de la activación de políticas de pertenencia, diferenciación y exclusión articuladas a través de las iglesias locales. Para ello se confrontan dos regiones del noroeste, una de ellas caracterizada por la proximidad de la monarquía (Asturias) frente a otra distante respecto a los principales focos de poder en los siglos viii-x (País Vasco). Las iglesias locales serán analizadas desde tres puntos de vista: las tecnologías constructivas, la relación entre las iglesias y otros elementos constitutivos del paisaje social, y la construcción de las identidades en las sociedades locales en términos de larga duración.
Sphaeropsis sapinea found as symptomless endophyte in Finland
Authors: Terhonen Eeva-Liisa , Babalola Jumoke , Kasanen Risto , Jalkanen Risto , Blumenstein Kathrin
Published: January 2021

Sphaeropsis sapinea
Diplodia sapinea
Pinus sylvestris
S. sapinea
S. sapinea
S. sapinea
S. sapinea
A lean menedzsment és a leadership jellemzők kapcsolata a hazai vállalati gyakorlatban (Lean management and leadership attributes in the practice of Hungarian firms)
Authors: Gelei Andrea , Losonci Dávid , Toarniczky Andrea , Báthory Zsuzsanna
Published: January 2021

A nemzetközi szakirodalom a vezetőt a lean termelés bevezetésében és fenntartásában is kulcsszereplőként határozza meg. Ennek ellenére nagyon kevés empirikus elemzés vizsgálja a vezetőkkel kapcsolatos kérdéseket. A szerzők a kontingencialista leadership elmélet keretei között a lean termelési rendszer és a vezetési jellemzők kapcsolatát vizsgálják elméleti szempontból és empirikusan egyaránt. Bár a kérdés nem került korábbi munkák fókuszába, az elméleti és empirikus megfontolások alapján egyaránt megállapítható, hogy több vezetési jellemző is szorosan kapcsolható egy jól működő lean termelővállalat vezetőjéhez. Követendő vezetési jellemzőként jelenik meg többek között az együttműködő, a delegáló, a teljesítményorientált vagy fejlődésorientált. Azonosíthatók olyan jellemzők is, amelyek elméletileg nem egyeztethetők össze a lean termelési rendszer logikájával, pl. autokrata, diktatórikus vagy mikrovezető ______ The working paper focuses on two connected research questions: on one hand based on widely accepted literature it systematically maps the ideal leadership style and related leader attributes that help in transforming a company into a real and well-functioning lean organization. On the other hand the paper analyzes whether leaders of companies with more developed lean practice do or do not follow these leadership attributes recommended by literature. The study uses the fourth round of the Hungarian Competitiveness Research Survey from 2009. This study is limited to the analysis of questionnaires filled in by producers that have more than 50 employees (about 65 manufacturing firms). The authors analyze the leadership styles of two managers, namely the CEO and production manager. Results of the empirical analysis revealed astonishing and contradictory attitudes toward ideal leadership attributes of leaders operating in more developed lean companies.
Analysis of Friction, Spring and Wedging action
Authors: Wallner Bo-Göran
Published: January 2021

In this educational academic paper we will derive the equations of motion for a wedge in contact by friction with spherical object. This object is connected to a spring. We will approach the problem with Newtonian mechanics and compare this result with a Lagrangian approach and we will show that they with some restriction leads to the same result. The results from the equations of motion will be dicussed. The equations will then be numerically simulated for a number of different cases and the results will be analyzed.
ALLOCATION OF BANDWIDTH IN DHCP REVIEW
Authors: IMAM MD. ABDULLAH YUSUF , BISWAS MR.PRODIP KUMAR
Published: January 2021

Network management is a broad range of functions including activities, methods, procedures and the use of tools to administrate, operate, and reliably maintain computer network systems. Strictly speaking, network Management does not include terminal equipment (PCs, workstations, printers, etc.).
Bioresorbable polymeric materials – current state of knowledge
Authors: Wiśniewska Kamila , Rybak Zbigniew , Wątrobiński Marcin , Struszczyk Marcin H. , Filipiak Jarosław , Szymonowicz Maria
Published: January 2021

Bioresorbable materials are used in medicine for fi xing, correcting or stabilizing bones in various anatomical areas, and the market for such materials is growing rapidly worldwide. The use of polymers for their production is associated with the ability to control their properties. They are prepared from bioresorbable materials with variable surface, geometry, porosity, as well as mechanical and surface properties. They support bone healing and are suitable for tissue regeneration due to their biodegradability and biocompatibility. We believe that materials from biodegradable polymers will play an increasingly important role in future medicine.
The use of natural polymers for treatments enhancing sowing material
Authors: Korbecka-Glinka Grażyna K , Wiśniewska-Wrona Maria , Kopania Ewa
Published: January 2021

Biopolymers from a group of polysaccharides are used in treatments enhancing sowing material of crops due to their physical and chemical properties, susceptibility to chemical modification, biodegradability and high bioactivity. Natural polymers, such as: chitosan, alginian, celulose, galaktoglucomannans, lignin and gellan gum, can be used as binders in seed coating or carriers of active substances and microorganisms. Moreover, biopolymers contained in the seed coatings and seed dressings can protect germinating seeds from unfavorable influence of environment and pathogens.
Correlation of manufacturing defects and impact behaviors of kenaf fiber reinforced hybrid fiberglass/Kevlar polyester composite
Authors: Suriani M.J. , Sapuan S.M. , Ruzaidi C.M. , Naveen J. , Syukriyah H. , Ziefarina M.
Published: January 2021

In this study, the impact properties of kenaf fibre reinforced hybrid fiberglass/Kevlar polymeric composite was investigated. In this study, a new fiber arrangement based on kenaf bast fiber as reinforcement to the hybrid fiberglass/Kevlar fiber and polyester as matrix used to fabricate the hybrid polymeric composite. Five different types of samples with different of kenaf fiber content based on volume fraction (0, 15, 45, 60 and 75%) to hybrid fiberglass/Kevlar polymer composites were manufactured. 0% of kenaf fiber has been used as control sample. The results showed that hybridization has improved the impact properties. These results were further supported through SEM micrograph of the manufacturing defects of the polymer composite. Based on literature work, manufacturing defects that occurs in composite system reduced the mechanical properties of the material. Therefore, in this research the correlation of impact behaviors and manufacturing defects of kenaf fiber reinforced hybrid fiberglass/Kevlar polymeric composite has been successfully done. As conclusion, the highest manufacturing defects determined in the composites during the fabrication significantly lowest the results of impact behavior.
Torsional strength tests of spline connections made of polymer materials (Rapid communication)
Authors: Oleksy Mariusz , Oliwa Rafał , Bulanda Katarzyna , Budzik Grzegorz , Przeszłowski Łukasz , Magniszewski Marek , Paszkiewicz Andrzej
Published: January 2021

This work is a continuation of the publication [1], in which the torsional strength tests of samples made of polymer materials, loaded with torsional moment, which more and more often can be made with the use of incremental technologies, were carried out. The designed proprietary test stand, which was described in the publication [1], was used. A series of preliminary studies on the torsion of fittings with spline connections obtained using additive techniques were carried out. It was found, that a additive technologies have a clear impact on the torsional strength of the tested machine components, including the placement of the prototype relative to the 3D printing plane or the method of processing polymer material.
Geometric analysis of injection-molded polymer gears (Rapid communication)
Authors: Pisula Jadwiga
Published: January 2021

Properties of polymer gears were tested using coordinate measurement methods. This study is a follow-up to research on geometric accuracy of gears manufactured by injection molding. Spur gears were measured on a coordinate measuring machine running the GINA software by Klingelnberg. Measurement results were output in the form of measurement sheets which included values required in the DIN 3962 standard. The article also analyses the topography of test gear teeth. The topography was presented for a single tooth of the gear and determined on the basis of the measurements of 9 profiles distributed evenly over a specific profile assessment interval (interval Lα defined in the standard) and 7 tooth traces located within a relevant tooth trace assessment interval (interval Lβ defined in the standard). All gears tested in this study were placed outside accuracy class 12.
Curricularização das relações étnico-raciais em uma faculdade de odontologia
Authors: Melo Fabricio de Medeiros , Riscado Jorge Luís de Souza
Published: January 2021

O estudo objetivou verificar a presença da temática étnico-racial no Curso de Graduação em Odontologia, visando identificar abordagens sobre as Relações Étnico-Raciais e da Saúde da População Negra no Projeto Pedagógico e nos conteúdos da matriz curricular do curso. A Metodologia baseou-se num estudo documental, de caráter exploratório, qualitativo, sustentado pelas recomendações das Diretrizes Curriculares para as Relações Étnico-Raciais, Política de Saúde Integral da População Negra e Diretrizes Curriculares para o Curso de Odontologia. A pesquisa se limitou à análise crítica de documentos de um curso graduação em Odontologia em Alagoas. Os dados foram coletados entre fevereiro e abril de 2018, utilizando uma matriz instrumental a partir das categorias: Explicitação das Relações Étnico-Raciais e a Saúde da População Negra nos Fundamentos e Justificativas para a Formação do Cirurgião dentista; A Dimensão étnico-racial afro-brasileiro nos objetivos; Habilidades e Competências; Relações Étnico-Raciais na Organização e no conteúdo. Os dados foram analisados na perspectiva de análise de conteúdo. Existe um silenciamento acerca das relações Étnico-Raciais no Projeto Pedagógico nos fundamentos e justificativas, nos objetivos e competências para a formação e nas abordagens dos conteúdos. A instituição possui aspectos na organização do curso e matriz curricular que permitem integralizar essa temática transversalmente.
Reform ripples: The role of recontextualization in scaling up
Authors: Aderet-German Tali , Lefstein Adam
Published: January 2021

This paper explores how educational interventions impact the districts they are implemented in above and beyond their intended outcomes. We argue that such unplanned “ripple effects”, in which program elements are recontextualized into other settings, are an important aspect of bringing educational interventions to scale. We analyze these phenomena in one Israeli district in which a teacher leadership and professional learning community initiative has been implemented and rapidly scaled up over the past five years. Extensive longitudinal ethnographic data were collected, including participant-observation in schools, professional development workshops, district management meetings and initiative-related events; 75 interviews with teachers and school and district management; and multiple informal conversations. We identify “ripples” in four arenas, and discuss the importance of individuals as mechanisms for transferring ideas across contexts, the role of ripples in advancing the initiative’s ethos, and the ripples’ long-term sustainability. Our findings suggest more attention should be paid to the impact of educational reforms on meaningful change beyond their original aims and settings. Alongside possible affordances these ripple effects have in the scaling up process, careful consideration should be given to their latent disadvantages, such as obscuring the program’s primary agenda.
Optimizing Mushroom Cultivation Process - Concepts for Control and Monitoring System
Authors: Chwietczuk Paweł , Siarnowski Mateusz , Lipiński Seweryn
Published: January 2021

The first part of the article contains a basic description of the mushroom production process. The analysis of this process allows to propose algorithms for monitoring the growing conditions and controlling the cultivation process − in the latter case with possible human operator intervention. These algorithms, along with their description, are included in the second part of the article - they can be used in the design and implementation of intelligent mushroom farm management systems.
Factors Influencing the Development of Milk Production in Agricultural Holdings
Authors: Cwalina Krzysztof , Borusiewicz Andrzej , Ferrari Maude , Herrmann Ivan T. , Priekulis Juris
Published: January 2021

Many factors influence milk production and farm development. The most critical factor determining the production is the price of sold milk and indirectly the costs connected with its production. In majority of farms, milk production is profitable. The decisive factors influencing the profitability of milk production are the balance of nutrition and ensuring the welfare of dairy herds. Equally important are the genetic characteristics of cows and proper rearing of calves. The study shows that the modernization of farms also influences the development of milk production by improving the optimization of energy use and reducing labour intensity, and overall optimization of production costs.
Emmission of Sulphur Oxides from Agricultural Solid Biofuels Combustion
Authors: Kraszkiewicz Artur , Santoro Francesco , Pascuzzi Simone
Published: January 2021

In the aspect of the course and analysis of products of biomass fuels combustion in grill feed boilers, the combustion process of wheat straw and meadow hay were assessed taking into consideration conditions of SO2 emission. Different types of briquettes used in the research not only had various chemical properties but also physical properties. In the aspect of assessment of energy and organic parameters of the combustion process, the sulphur content in biomass becomes a significant factor at its energy use. Registered emission during combustion of meadow hay biomass referred to wheat biomass was for A and B type briquettes correspondingly higher by ca. 320 and 120%. Differences in SO2 emission at combustion of various biofuel forms in the aspect of the relation with the remaining combustion parameters including mainly with air flow require, however, further research that leads to development of low-emission and high-efficient biofuel combustion technologies in low-power heating devices.
Economic Analysis of the Photovoltaic Installation Use Possibilities in Farms
Authors: Kwaśniewski Dariusz , Akdeniz Cengiz , Durmaz Faruk , Kömekçi Fırat
Published: January 2021

The aim of the study was to conduct an economic analysis of the possibilities of using photovoltaic (PV) installations in selected farms. Two selected online PV calculators were used for the analysis. The research included 15 farms located in the Małopolskie Province. For a PV installation estimated using Calculator 1, Hewalex, the payback period ranged from 5.5 to 7 years for the 40% subsidy option and from 9 to 11 years without the subsidy, respectively. On the other hand, the payback period estimated with the use of the SmartekDom calculator ranged from 6 to 8 years for the option with 40% subsidy. However, without the subsidy, the period ranged from 7 to even 13 years.
The Possibilities of a Multifunctional Control and Measure-Ment System Installed in a Small Hydropower Plant
Authors: Łapiński Krzysztof , Sołowiej Piotr
Published: January 2021

In 2020, a fully automated hydropower plant was launched on the Guber River near the town of Kotkowo. The plant is operated by a master control and measurement system, which collects data to evaluate the operation of selected systems of the facility. The number and location of sensors controlling the parameters of hydroelectric systems are selected accordingly, to collect complete information from all sensors and analyze the operation of hydroelectric systems in real time. In addition, storing all the controlled parameters allows analyzing the plant’s operation over longer periods. This work presents the possibilities of this measurement system, as well as the measurement results obtained in the tested object. Analyzing the operation of the control and measurement system as well as the collected and archived data will be the foundation for a simulation model of a hydropower plant. The model will be helpful in optimizing the operation of existing hydroelectric plants in terms of energy production per unit volume of water, and in designing new ones on existing barrage.
Survey-Based Qualitative Analysis of Young Generation Perception of Sustainable Development in Poland
Authors: Pena Ingrid A. B. , Lucas Isabella L. , Penna-Firme Rodrigo , Strassburg Bernardo , Drosik Adam , Rubisz Lech , Kubon Maciej , Latala Hubert , Grotkiewicz Katarzyna , Kubon Krzysztof , Batalhão André C. S. , Latawiec Agnieszka E.
Published: January 2021

Understanding the perception of Sustainable Development can help to identify misconceptions surrounding the concept in order to design better education plans and public policies on this subject. Evaluating the perception of sustainability issues by focusing on the young generation as is an important proxy to imagine what the future holds for in terms of addressing sustainable development. We conducted 177 in-person interviews on a heterogeneous group of students and random volunteers in four cities in Poland to assess their perception of Sustainable Development. The vast majority (89.3%) of the respondents were familiar with the term ‘Sustainable Development’. However, part of them (57%) associated it only to the human and social development dimensions and its institutions, whereas 17.5% related it with its environmental aspects. The results supported by the literature review highlight challenges concerning the path towards a comprehensive perception of Sustainable Development and hence the achievement of the SDGs. Based on these results, we identify opportunities and incentives to bring Poland towards 2030 Agenda.
Support of Internal Transport Optimization in Farms with the Use of Spatial Information Systems
Authors: Sikora Jakub , Szeląg-Sikora Anna , Gródek-Szostak Zofia , Niemiec Marcin , Stuglik Joanna
Published: January 2021

Excessive distribution of holdings is one of the most important barriers which causes that in a great part of Poland rational use of farms in impossible. This problem particularly concerns the south and east region of the country. Correct spatial distribution of lands belonging to holdings is one of the most crucial factors that enable an economically profitable activity of these farms. The aim of the paper was verification of the applicability of the prepared spatial data base, farm-land configuration of agricultural plots of the selected agricultural farms to indicate the areas of optimization of the internal transport. As a result, based on the developed spatial data base, an impact of the land configuration of agricultural plots in the investigated group of agricultural producers on organization of the field transport between the holding and agricultural plots was determined. The scope of the paper covered a vegetable producer group, which associates 5 farms that have in total 620 ha of agricultural land.
Modeling of Shear Rheological Behavior of Uncured Rubber Melt
Authors: Yang Hengxiao , Mo Qimian , Lu Hengyu , Zhang Shixun , Cao Wei , Shen Changyu
Published: January 2021

To describe uncured rubber melt flow, a modified Phan–Thien–Tanner (PTT) model was proposed to characterize the rheological behavior and a viscoelastic one-dimensional flow theory was established in terms of incompressible fluid. The corresponding numerical method was constructed to determine the solution. Rotational rheological experiments were conducted to validate the proposed model. The influence of the parameters in the constitutive model was investigated by comparing the calculated and experimental viscosity to determine the most suitable parameters. The uncured rubber viscosity was 3–4 orders larger than that of plastic and did not have a visible Newtonian region. Compared with the Cross-Williams-Landel-Ferry (Cross-WLF) and original PTT models, the modified PTT model can describe the rheological characteristics in the entire shear-rate region if the parameters are set correctly.
Predictive model linking super-rotation, magnetospheric generation and atmospheric heating
Authors: Merrison Jonathan Peter
Published: January 2021

This work applies a previously suggested model of gravitational field propagation to various planetary bodies within the solar system. Primarily the goal has been to critically test the validity of this model by identifying observations which are in direct conflict with it. Specifically this model predicts a Doppler shift in gravitational acceleration (gD). Applying the model to the planets and the Sun gD acts to increase planetary spin, opposing various sources of drag. The model is seen not to be in conflict with a wide variety of observed parameters which have been treated here and is shown to quantitatively account for several observed phenomena previously thought to be unrelated and which have been di˚cult to explain conventionally. These phenomena include the internal heat generation and magnetospheric generation within the gas giants as well as super rotation which seen in most planetary atmospheres as well as the Sun as differential rotation. This model for the first time provides a quantitative prediction of the low internal heat generation seen in Uranus compared to Neptune. It also provides a novel mechanism for solar coronal heating, thermospheric heating in the gas giants and the correlation between climate and magnetosphere observed on Earth.
Bibliometric profiles of top 50 most cited articles on bioactive glass
Authors: Sujon Mamun Khan , Noor Siti Noor Fazliah Mohd , Zabidi Muhammad Azrul Bin , Shariff Khairul Anuar , Alam Mohammad Khursheed
Published: January 2021

Citation analysis of a certain publication acknowledges its impact on the scientific community. This study conducted a multivariate analysis of the top 50 most cited articles published on the field of Bioactive Glass. A systemic search was performed using the “All database” section of the Web of Science to retrieve the top 50 most cited original publications. The selected articles were then manually cross-matched with Elsevier Scopus and Google Scholar Database. Parameters such as article title, authorship, institution, country of publication, year, citation count, citation density, current citation index, and journal name were retrieved from Web of Science. Different ranges of citation numbers were retrieved for these publications in which 197-913 are from Web of Science, 209-962 are from Elsevier Scopus, and 269-1225 are from Google Scholar. A total of 153 authors contributed to this marked list, where Professor L.L. Hench contributed the highest number of articles (n=21). Imperial College London published the highest number of articles (n=21). In summary, this study provides a good scientometric picture of bioactive glass related publications, which illustrate the trend of biomaterials development over the years and suggests future scopes to the scientific community.
The complete mitogenome sequence of the coral lily (Lilium pumilum) and the Lanzhou lily (Lilium davidii) in China
Authors: Qi Xiangying , Wang Kaiqi , Yang Liping , Deng Zhenshan , Sun Zhihong
Published: January 2021

Background

The mitogenomes of higher plants are conserved. This study was performed to complete the mitogenome of two China Lilium species (Lilium pumilum Redouté and Lilium davidii var. unicolor (Hoog) cotton).

Methods

Genomic DNA was separately extracted from the leaves of L. pumilum and L. davidii in triplicate and used for sequencing. The mitogenome of Allium cepa was used as a reference. Genome assembly, annotation and phylogenetic tree were analyzed.

Results

The mitogenome of L. pumilum and L. davidii was 988,986 bp and 924,401 bp in length, respectively. There were 22 core protein-coding genes (including atp1, atp4, atp6, atp9, ccmB, ccmC, ccmFc, ccmFN1, ccmFN2, cob, cox3, matR, mttB, nad1, nad2, nad3, nad4, nad4L, nad5, nad6, nad7 and nad9), one open reading frame and one ribosomal protein-coding gene (rps12) in the mitogenomes. Compared with the A. cepa mitogenome, the coding sequence of the 24 genes and intergenic spacers in L. pumilum and L. davidii mitogenome contained 1,621 and 1,617 variable sites, respectively. In the phylogenetic tree, L. pumilum and L. davidii were distinct from A. cepa (NC_030100).

Conclusions

L. pumilum and L. davidii mitogenomes have far distances from other plants. This study provided additional information on the species resources of China Lilium.
Ropivacaine inhibits proliferation, migration, and invasion while inducing apoptosis of glioma cells by regulating the SNHG16/miR-424-5p axis
Authors: Liu Rong , Wu Min , Xu Guiju , Ju Lu , Xiao Jinhui , Zhong Wei , He Xiao , Yang Yan
Published: January 2021

Background

Regional anesthesia has anti-proliferative and pro-apoptotic effects in various cancers. Therefore, the purpose of this study was to investigate the effects of ropivacaine on the proliferation, migration, invasion, and apoptosis of glioma cells in vitro.

Methods

Under ropivacaine stimulation conditions, proliferation, apoptosis, migration, and invasion of glioma cells were determined by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazol-3-ium bromide (MTT), flow cytometry, and transwell assays, respectively. Western blot assay was employed to measure the protein expression levels in glioma cells. The expression levels of small nucleolar RNA host gene 16 (SNHG16) and miR-424-5p were assessed by reverse transcription-quantitative polymerase chain reaction (RT-qPCR). The interaction relationship between SNHG16 and miR-424-5p was predicted and confirmed using a bioinformatics database and dual-luciferase reporter, RNA immunoprecipitation (RIP) and RNA pull-down assays.

Results

After treatment with ropivacaine, proliferation, migration, and invasion were repressed while apoptosis was enhanced in glioma cells in a dose-depended manner. In addition, ropivacaine impeded SNHG16 expression in glioma cells. Importantly, overexpression of SNHG16 abolished the ropivacaine-induced effects on glioma cells. Analogously, knockdown of miR-424-5p counteracted the function of ropivacaine in glioma cells. We also found that SNHG16 bound to miR-424-5p and negatively regulated miR-424-5p expression in glioma cells. The rescue experiments indicated that ropivacaine might regulate glioma progression by targeting the SNHG16/miR-424-5p axis.

Conclusion

Our findings revealed the anti-tumor effects of ropivacaine in glioma by targeting the SNHG16/miR-424-5p axis. These data might extend the understanding of regulatory mechanisms by which ropivacaine could suppress glioma development.
Exogenous spermidine affects polyamine metabolism in the mouse hypothalamus
Authors: Jiang Dongmei , Mo Guilin , Jiang Yilong , Kang Bo
Published: January 2021

Spermidine is important for the hypothalamic control of pituitary secretion of hormones involved in neuroendocrine functions in mammals. In this study, the effect of exogenous spermidine on the expression of genes and proteins related to polyamine metabolism and polyamine levels was examined. The results indicated that treatment with spermidine at 0.05 mg/g (BW) significantly increased the levels of Oaz1 mRNA and protein expression and decreased putrescine content in mouse hypothalamus (p < 0.05). The administration with spermidine at 0.10 mg/g significantly increased the levels of Oaz1, Oaz2, and Odc expression in mouse hypothalamus (p < 0.05). Treatment with spermidine at 0.05 mg/g significantly increased the levels of Ssat mRNA expression and reduced the level of Smo mRNA expression in mouse hypothalamus (p < 0.05). Putrescine concentrations in the hypothalamus after the administration of spermidine at 0.10 and 0.15 mg/g were significantly higher than those in the control group (p < 0.05). The concentration of both spermidine and spermine in the hypothalamus after the administration of spermidine at 0.15 mg/g was decreased significantly (p < 0.05). In summary, our results indicate that exogenous spermidine affects polyamine homeostasis in the mouse hypothalamus by modulating the expression of genes and proteins related to polyamine metabolism.
A new phenyl alkyl ester and a new combretin triterpene derivative from Combretum fragrans F. Hoffm (Combretaceae) and antiproliferative activity
Authors: Gade Isaac Silvère , Chadeneau Corinne , Simo Richard Tagne , Talla Emmanuel , Atchade Alex De Theodore , Seité Paule , Vannier Brigitte , Laurent Sophie , Henoumont Celine , Nwabo Kamdje Armel H. , Muller Jean-Marc
Published: January 2021

This work concerns the isolation and structure elucidation of compounds obtained from the extract of leaves and stem bark of Combretum fragrans F. Hoffm. Both extracts and some isolated compounds were tested for antiproliferative activity on glioblastoma (U87MG and C6 cells) and prostate (PC-3 cells) cancer cell lines using XTT (2,3-bis[2-methoxy-4-nitro-5-sulfophenyl]-2H-tetrazolium-5-carboxyanilide inner salt) assay. The dichloromethane/methanol (1:1) extract of the leaves led to the isolation of two new compounds such as fragransinate (1) and combretin C (2), alongside five known compounds such as combretin A (3), belamcanidin (4), cirsilineol (5), velutin (6), and a mixture of β-sitosterol-3-O-β-d-glucopyranoside (10a) and stigmasterol-3-O-β-d-glucopyranoside (10b), whereas the methanol extract of the stem bark led to the isolation of three known compounds betulinic acid (7), bellericagenin B (8), and a mixture of β-sitosterol (9a) and stigmasterol (9b). The structure of compounds was elucidated by nuclear magnetic resonance and mass spectrometry data. The methanol extract of the stem bark showed a powerful antiproliferative activity on all tested cells, as well as the extract of leaves which also showed important cytotoxicity effect. Compound (3) showed good antiproliferative activity particularly on U87MG and PC-3 cells, whereas compound (5) exhibits moderated activity. Compounds (2) and (8) were not active on all tested cells.
An iterative algorithm for the system of split mixed equilibrium problem
Authors: Karahan Ibrahim , Jolaoso Lateef Olakunle
Published: January 2021

In this article, a new problem that is called system of split mixed equilibrium problems is introduced. This problem is more general than many other equilibrium problems such as problems of system of equilibrium, system of split equilibrium, split mixed equilibrium, and system of split variational inequality. A new iterative algorithm is proposed, and it is shown that it satisfies the weak convergence conditions for nonexpansive mappings in real Hilbert spaces. Also, an application to system of split variational inequality problems and a numeric example are given to show the efficiency of the results. Finally, we compare its rate of convergence other algorithms and show that the proposed method converges faster.
Inequality in Higher Education: Why Did Expanding Access Not Reduce Skill Inequality?
Authors: Borgonovi Francesca , Marconi Gabriele
Published: January 2021

Lack of comparable cross-country data on access to and participation into higher education (HE) among disadvantaged and marginalised communities prevents a comprehensive examination of the role of education in shaping social mobility and how this has changed following educational expansions. We use data from the OECD Survey of Adult Skills, the Programme for International Student Assessment as well as administrative and census data from several countries to provide a comprehensive cross-country overview of the relationship between, on the one hand, socio-economic background, migrant background, and place of residence, and on the other hand, HE expectations, participation and completion. We find that when a higher share of the population has access to higher education, inequalities in access and completion are lower, but inequalities in skill levels remain unchanged. This could be due to the varying degree of inequality observed at different levels of higher education; as well as to the differences in the aspirations secondary school students express of enrolling and completing HE. We discuss implications for research and policy.
Digital Didactic Objectives of Primary, Secondary, and Higher Education Curricula in the 21st Century Executable with a Single-board Computer
Authors: Nothacker Jens , Lavicza Zsolt
Published: January 2021

This paper deals with the didactic objectives and content from the latest curricula of the different types of schools (schools, colleges, universities) in the D-A-CH regions. The aim of this paper is to provide an overview of the didactic goals of current and future curricula for primary, secondary, and high school, which are feasible with a single board computer. For this purpose, the curricula are analysed according to digital terms and methods of information technology with a qualitative deductive meta-analysis and assigned to different categories. The results are presented in different diagrams for evaluation, from which the results can be interpreted. The results include a list of digital didactic goals, structured according to school type, competencies, and feasibility, which can be implemented with a single-board computer. All in all, it was found that an inexpensive single-board computer is quite sufficient for the acquisition and implementation of the digital goals and skills to be taught in the curricula. Furthermore, it was found out how the changes in the curricula have established themselves in the different regions with a time lag and which competencies are taught at the individual school levels. The paper concludes with a recommendation for further studies.
Effect of weld metal composition on impact toughness properties of shielded metal arc welded ultra-high hard armor steel joints
Authors: Balaguru V. , Balasubramanian Visvalingam , Sivakumar P.
Published: January 2021

Nowadays, ultra-high hard armor (UHA) steels are employed in armor tracked vehicle (ATV) construction because of their high hardness, high strength to weight ratio, and excellent toughness. UHA steels are usually welded using austenitic stainless steel (ASS) welding consumables, to avoid hydrogen-induced cracking (HIC). The use of ASS consumables to weld the above steel was the only available remedy because of higher solubility of hydrogen in the austenitic phase. In this investigation, an attempt was made to investigate the effect of ASS consumables (with different Cr
eq
/Ni
eq
ratio) on solidification mode, impact toughness and microstructural characteristics of shielded metal arc (SMA) welded UHA steel joints. The welded joints were characterised based on impact toughness properties, hardness, and microstructural features. As the ferrite number increases with an increase in Cr
eq
/Ni
eq
ratio result in different solidification mode (A, FA, F). It is also found that ferrite number of weld metal has appreciable influence on impact toughness and has inversely proportional relationship with impact toughness of the welded joints.