bluuebunny/crossref_metadata_2025_split huggingface dataset:
Bending-gravity waves in the sea with an ice cover from moving disturbances
Authors: Маленко Ж.В. , Ярошенко А.А. 
Published: July 2021

В статье проводятся исследования колебаний плавающего ледяного покрова под действием движущихся возмущений. В основу колебаний плавающего ледяного покрова положены линеаризованные уравнения гидромеханики и линейная классическая теория колебаний пластин. Ледяной покров рассматривается как тонкая упругая изотропная пластинка. Анализируются образующиеся при этом трехмерные изгибно-гравитационные волны. Показано, что при движении источника возмущений со скоростью 0<v<v0 изгибно-гравитационные волны не образуются, а наблюдается статический прогиб. Здесь v0 – минимальное значение фазовой скорости. При скорости движения v0<v<v1 образуется одна система изгибно-гравитационных волн. Эти волны распространяются как впереди, так и за источником возмущений. Волны, бегущие впереди источника, обусловлены упругими и массовыми силами пластинки. Волны, распространяющиеся за источником, имеют характер гравитационной волны для чистой воды. При v1<v<(gH)1/2 образуется три системы волн. Упругие волны распространяются впереди источника. Две другие волны распространяются за источником и носят характер поперечной и продольной корабельных волн. При v>(gH)1/2 образуются впереди источника упругие волны, а за источником продольные корабельные волны. Исследовано влияние скорости перемещения нагрузки на амплитуды образующихся волн.
The article studies the fluctuations of the floating ice cover under the action of moving perturbations. The vibrations of the floating ice cover are based on the linearized equations of hydro-mechanics and the linear classical theory of plate vibrations. The ice sheet is considered as a thin elastic isotropic plate. The resulting three-dimensional bending-gravity waves are analyzed. It is shown that when the source of disturbances moves at a speed of 0<v<v0, bending-gravitational waves are not formed, but a static deflection is observed. Here v0is the minimum value of the phase velocity. At the speed of motion v0<v<v1, a single system of bending-gravitational waves is formed. These waves propagate both ahead and behind the source of the disturbances. The waves traveling ahead of the source are caused by the elastic and mass forces of the plate. The waves propagating behind the source have the character of a gravitational wave for pure water. At v1<v<(gH)1/2, three wave systems are formed. Elastic waves propagate ahead of the source. The other two waves propagate behind the source and have the character of transverse and longitudinal ship waves. At v>(gH)1/2, elastic waves are formed in front of the source, and longitudinal ship waves are formed behind the source. The influence of the load displacement velocity on the amplitudes of the generated waves is investigated.
Formation of the necessary configuration of the detection zone by radar means with superscanning on the example of the port section of Novorossiysk
Authors: Ольшанский В.В. , Лутков С.А. , Мартемьянов С.В. , Меньшенина Е.А. 
Published: July 2021

В статье рассматривается способ применения методов сверхбыстрого сканирования в радиолокационных технических соседствах обнаружения систем охраны объектов транспортной инфраструктуры. В основе предлагаемого подхода использована возможность формирования требуемого ракурса зондирования пространства однопозиционной системой со сверхбыстрым сканированием луча антенны в угловом секторе обзора. Опыт эксплуатации систем охраны показывает, что для обеспечения зон безопасности морских терминалов, гидротехнических сооружений, акваторий морских портов и т.п. существенным является организация пространственных зон контроля. Разработана математическая модель формирования требуемой конфигурации зоны обнаружения радиолокационным средством со сверхсканированием на примере участка порта Новороссийск. Полученные аналитические зависимости законов сверхсканирования позволяют учесть сценарии различных ситуаций нарушения безопасности, по которым тревожными считаются факты появления или движения объектов в запрещённом направлении относительно условно заданных границ контролируемой территории.
The article considers a method of applying ultra-fast scanning methods in radar technical neighborhoods for detecting security systems for transport infrastructure objects. The proposed approach is based on the possibility of forming the required perspective of space sensing by a single-position system with ultra-fast scanning of the antenna beam in the angular sector of the view. The experience of operating security systems shows that the organization of spatial control zones is essential for ensuring the security zones of sea terminals, hydraulic structures, seaports, etc. A mathematical model of the formation of the required configuration of the detection zone by radar means with superscanning is developed on the example of the port of Novorossiysk section. The obtained analytical dependences of the laws of superscanning allow us to take into account scenarios of various security violation situations, according to which the facts of the appearance or movement of objects in the prohibited direction relative to the conditionally defined boundaries of the controlled territory are considered alarming.
Si T̪end̪i zot̪ʰe za Kabla ya Karne ya Ishirini ni Utambaji wa Kingano Nyengine ni Ufunzaji: Kiyelelezo cha Ut̪end̪i wa Siri li Asrari
Authors: Karama Mohamed , Chimerah Rocha , Mutiso Kineene 
Published: July 2021

Fikra iliyomo katika mawand̪a ya fasihi ya Kiswahili ni kuwa ut̪end̪i ni maelezo marefu ya mapisi ya jamii kiushairi. Makala haya yanat̪aka kuonesha kwamba si t̪end̪i zot̪ʰe zenye madhumuni haya. Kupitiya Ut̪end̪i wa Siri li Asrari tut̪aonesha kwamba mtʰunzi Mwanalemba alikuwa na niya t̪angu mwanzo ya kuweka d̪arasa kuhusu hirizi ya majina ya Mwenyezi Mungu. D̪arasa hii ameigawanya kama namna t̪aasisi za kielimu zinavopendekeza ienreshwe kiskuli na ameyat̪owa mawazo yake kit̪aalamu. Nadhariya ya Usemezano kupitiya dhana ya Unrimi imetusaidiya kuuwangaziya ut̪end̪i huu na tumefaidika na vigezo va: maudhui, ut̪euzi wa misamiat̪i na mitinro ya uwasilishaji, na mukt̪adha wa matʰumizi ya maneno hayo kama njiya ya kutambuwa aina ya lugha inayotʰumika. Kwa kwangaziya mitinro ya uwasilishaji katika d̪arasa ya hirizi tumepata kujuwa kwamba mtʰunzi alikuwa na dhamira ya kutufunza badala ya kutamba hadithi ya kingano.
Jupiter’s Dynamical Love Number
Authors: Lai Dong 
Published: July 2021

Abstract
Recent observations by the Juno spacecraft have revealed that the tidal Love number k
2 of Jupiter is 4% lower than the hydrostatic value. We present a simple calculation of the dynamical Love number of Jupiter that explains the observed “anomaly.” The Love number is usually dominated by the response of the (rotation-modified) f-modes of the planet. Our method also allows for efficient computation of high-order dynamical Love numbers. While the inertial-mode contributions to the Love numbers are negligible, a sufficiently strong stratification in a large region of the planet’s interior would induce significant g-mode responses and influence the measured Love numbers.
A Mobile Health App for Premarital Related Word Advice (AmeeSehat): Usability and Usefulness Evaluation Study
Authors: Wiyanti Zulvi , Oenzil Fadil , Masrul Masrul , Djafri Defriman 
Published: July 2021

Background:Premarital counseling demonstrates promising approach for enhancing interaction between couples and to prevent deterioration in the well-being of relationships. Mobile health (mHealth) apps may provide an appropriate solution to this issue, as many potential brides and grooms are frequent users of internet or web-based health info.
Aim:This research aimed to measure the usability and usefulness of the AmeeSehat App as interpreted by potential end users.
Method: This study employed a mixed method carried out in one of the public-health centers in East Jakarta, Indonesia with the future bride and groom. Think Aloud (TA) sessions with participants (n=10 final users and 3 experts) and quantitative assessment with 60 participants were held.A think aloud meetings have been captured, transcripts, and analyzed. The usability issues were evaluated using Nielsen severity scale and the Device Usability Scale (SUS). The usefulness of the AmeeSehat App was assessed using a tool to evaluate an improvement in healthy family knowledge, attitude, and intention, and readiness to marry.
Results: The SUS score obtained (mean=78.4, SD=6.83), and none of the participants experienced (severe) problems with usability. Only 1 usability problems have been reported with a severity of 3 (major), namely terminology issues. The change after using AmeeSehat was statistically significant different as McNemar test revealed p <0.05.
Conclusion:This researcher revealed that, in terms of its usability and usefulness, the AmeeSehat app is feasible to future brides and grooms. Participants considered AmeeSehat beneficial because they had the opportunity to learn more about a stable home life in preparation for marriage. Further assessment should be carried out in the form of a randomized controlled trial to test AmeeSehat's effectiveness in enhancing awareness, attitude, intention and readiness.
Spectrum and Outcome of Noninfectious Aortitis
Authors: Ferfar Yasmina , Morinet Sarah , Espitia Olivier , Agard Christian , Vautier Mathieu , Comarmond Cloé , Desbois Anne Claire , Domont Fanny , Resche-Rigon Matthieu , Cacoub Patrice , Biard Lucie , Saadoun David 
Published: July 2021

ObjectiveTo assess the spectrum and long-term outcome of patients with noninfectious aortitis.MethodsWe performed a retrospective multicenter study of 353 patients (median age at diagnosis was 62 [IQR 46–71] yrs and 242 [68.6%] patients were women) with noninfectious aortitis. Factors associated with vascular complications were assessed in multivariate analysis.ResultsWe included 136 patients with giant cell arteritis (GCA), 96 with Takayasu arteritis (TA), 73 with clinically isolated aortitis (CIA), and 48 with aortitis secondary to inflammatory diseases (including Behçet disease, relapsing polychondritis, IgG4-related disease, Cogan syndrome, ankylosing spondylitis). After a median follow-up of 52 months, vascular complications were observed in 32.3%, revascularizations in 30% of patients, and death in 7.6%. The 5-year cumulative incidence of vascular complications was 58% (95% CI 41–71), 20% (95% CI 13–29), and 19% (95% CI 11–28) in CIA, GCA, and TA, respectively. In multivariate analysis, male sex (HR 2.10, 95% CI 1.45–3.05, P < 0.0001) and CIA (HR 1.76, 95% CI 1.11–2.81, P = 0.02) were independently associated with vascular complications.ConclusionNoninfectious aortitis accounts for significant morbidity and mortality. CIA seems to carry the highest rate of vascular complications.
COVID-19 on YouTube: Debates and polarisation in the digital sphere
Authors: Luengo Oscar , García-Marín Javier , de-Blasio Emiliana 
Published: July 2021

Social media has significantly transformed how political discussions and deliberations occur, mainly by providing a digital realm for the public sphere. This study aims to analyse the extent of polarised opinions across Spain, Italy and the United Kingdom regarding COVID-19 during 2020 within social media. To do this, we examined YouTube comments (n=111,808) using automatic analysis and machine-learning techniques based on algorithms. This methodological strategy denoted an innovative and unique quantitative approach for this field of study. In line with previous research, the hypothesis was that the degree of polarization does not crystallize in the same manner in different countries’ digital spheres. Therefore, it could be said that higher levels of polarization occur amongst Southern European countries like Spain and Italy (both countries adhering to a polarised pluralism model), compared to other countries ascribing to the liberal model (the United Kingdom in our study), which provides evidence supporting previous research studies. The results confirmed the hypothesis that the polarization of digital deliberation between Spain and Italy is higher than in the United Kingdom. But, also, the findings based on more disaggregated analysis suggest that the most polarized attitudes are even rewarded by other users in Mediterranean countries.
Las redes sociales han transformado de forma muy significativa la forma en la que se produce el diálogo político, impulsando una configuración digital de la esfera pública. El presente artículo tiene como objetivo el análisis de la deliberación producida en las redes sociales, con un especial énfasis en la polarización. Tomando como referencia los comentarios observados en YouTube sobre la COVID-19 durante 2020 en España, Italia y Reino Unido, lo cual arroja una muestra de 111.808 comentarios, se aplicaron una serie de técnicas automáticas de análisis basadas en algoritmos, lo que supone una metodología cuantitativa novedosa en este ámbito de estudio. En línea con lo señalado por trabajos previos, la hipótesis que se plantea en este artículo es que el grado de polarización no se da con la misma intensidad en las esferas digitales de distintos casos. De esta manera, cabe esperar unos mayores registros de polarización en la esfera digital de los países del sur de Europa, adscritos a un modelo de pluralismo polarizado, que en países de otros modelos como el liberal. Los resultados confirman la hipótesis, verificando que no solo se observa mayor polarización en España e Italia que en Reino Unido, sino que, a nivel desagregado, los hallazgos apuntan a que la actividad más polarizante obtiene mayor aprobación en los países mediterráneos de nuestra muestra.
Digital media and university political practices in the public sphere
Authors: Maltos-Tamez Ana-Laura , Martínez-Garza Francisco-Javier , Miranda-Villanueva Oscar-Mario 
Published: July 2021

In a predominantly digital communicative context, the political practices of young university students are relevant for the vitality of public spheres and the consolidation of participatory democracy. The objective of this study was to learn how the use of digital media relates to the political talk and participation practices of university students. Using quota sampling, a survey was conducted among 435 undergraduate students residing in the Metropolitan Area of Monterrey, Mexico, during the second semester of 2020. Among these students with favorable access to digital media, positive correlations with small to moderate and statistically significant magnitudes were found between the various uses of digital media and their political practices. News use was moderately correlated with political talk, as was social use with politically motivated activities, and creative use with all forms of participation. Political talk mainly affected the relationship between participation and news use. These findings support the relevance of the active role of young people in their political socialization, as social interaction and content creation were more closely correlated with political participation than news consumption was, which was more beneficial to participation when articulated through political talk.En un contexto comunicativo predominantemente digital, las prácticas políticas de los jóvenes universitarios son de importancia para la vitalidad de las esferas públicas y la consolidación de la democracia participativa. El objetivo de este estudio fue conocer cómo se relaciona el uso de los medios digitales con las prácticas de conversación y participación políticas de los universitarios. Mediante un muestreo por cuotas, se realizó una encuesta a 435 estudiantes de nivel licenciatura residentes en la Zona Metropolitana de Monterrey, México, durante el segundo semestre de 2020. Entre estos estudiantes con acceso favorecedor a los medios digitales, se encontraron correlaciones positivas con magnitudes de pequeñas a moderadas y estadísticamente significativas entre los diversos usos de los medios digitales y sus prácticas políticas. El uso noticioso se correlacionó moderadamente con la conversación política, así como el uso social con las actividades políticamente motivadas, y el uso creativo con todas las formas de participación. La conversación política incidió principalmente en la relación entre la participación y el uso noticioso. Estos hallazgos respaldan la relevancia del papel activo de los jóvenes en su socialización política, pues la interacción social y la creación de contenidos se relacionaron más estrechamente con la participación política que el consumo de noticias, el cual fue más provechoso para la participación al articularse a través de la conversación política.
Young people and social networks: Between the democratization of knowledge and digital inequality
Authors: Andrade-Vargas Lucy , Iriarte-Solano Margoth , Rivera-Rogel Diana , Yunga-Godoy Deisi 
Published: July 2021

The growing access to the Internet, devices, and social media has revolutionized communication processes and democratized access to information and content creation. However, several researchers have shown that although access to the Internet is readily available, the virtual world is a mirror of the society in which we live where digital inequity exists. Several studies present evidence that social status does not affect the presence of social network users, but it does affect the way it is used and content creation, although it concerns studies that were mostly carried out in European and North American contexts. This research explores the socioeconomic profile of young people concerning the consumption and creation of content, and the virtual world of adolescents related to social inequalities found in the real world. This study followed an exploratory quantitative design by means of a survey that was applied to 2,115 high-school students from high-performing educational institutions in Ecuador. The results highlight three units of analysis: (1) reasons for using the platform (2) time of consumption (3) type of content that young people create. In line with previous studies, it points out how the socioeconomic environment has an effect on how young people use social networks. Similarly, it shows an increase in the democratization of content creation processes.
El creciente acceso a Internet, dispositivos y redes sociales ha revolucionado los procesos de comunicación y democratizado el acceso a la información y la creación de contenido. Sin embargo, varios investigadores han mostrado que, si bien el acceso al Internet es fácilmente alcanzable, el mundo virtual es un espejo de la sociedad en la que vivimos existiendo inequidad digital. Varios estudios presentan evidencia de que el estrato social no afecta a la presencia de usuarios en las redes, pero sí afecta su uso y la creación de contenido, si bien se trata de estudios desarrollados mayoritariamente en contextos europeos y norteamericanos. La presente investigación explora el perfil socioeconómico de los jóvenes en el consumo y creación de contenidos, y el mundo virtual de los adolescentes en materia de desigualdades sociales encontradas en el mundo real. La investigación siguió un diseño cuantitativo exploratorio a través de una encuesta que fue aplicada a 2.115 estudiantes de educación secundaria y bachillerato de instituciones educativas de alto rendimiento de Ecuador. Los resultados dan cuenta de tres unidades de análisis: 1) razones de uso de la plataforma; 2) tiempo de consumo; 3) tipo de contenido que crean los jóvenes. En consonancia con estudios anteriores, se señala cómo el entorno socioeconómico tiene un efecto en cómo los jóvenes usan las redes sociales. Al mismo tiempo se muestra un auge en la democratización de los procesos de creación de contenido.
The impact of serious games in mathematics fluency: A study in Primary Education
Authors: Fraga-Varela Fernando , Vila-Couñago Esther , Martínez-Piñeiro Esther 
Published: July 2021

In recent years there has been a renewal of educational software encouraged by the incorporation of specific designs based on serious games. Previous studies on their use do not provide conclusive data on the advancement in learning, both at a general level and in specific contents. The main objective of this work is to study the impact of the use of serious games in primary education classrooms, specifically on mathematics fluency, taking into account gamification variables and teaching experience. A quasi-experimental study was carried out with a pretest-posttest design, without a control group and with several experimental groups, involving 284 students from the first to the fourth grade. The results show a significant improvement in mathematics fluency with the use of serious games in the different grades and classroom groups studied. The gamification strategy promotes even greater progress over the classes where it has not been implemented. There is a similar time of use of serious games by both novice and experienced teachers, with better results in mathematics fluency in the case of the second group. It also shows the relationship between the results obtained and the school grades of the students. The findings point to the potential of using serious games designed specifically for school environments and challenge previous work on generational barriers in teachers.
En estos últimos años ha habido una renovación del software educativo propiciada por la incorporación de diseños específicos basados en juegos serios. Los estudios previos sobre su uso no ofrecen datos concluyentes sobre el avance en el aprendizaje, tanto a nivel general como de contenidos específicos. El objetivo principal del presente trabajo es conocer el impacto del uso de juegos serios en las aulas de educación primaria, concretamente en la fluidez matemática del alumnado, atendiendo a variables de gamificación y experiencia docente. Se lleva a cabo un estudio cuasi-experimental con pretest-postest, sin grupo control y con varios grupos experimentales, en el que participan 284 estudiantes de primero a cuarto curso. Los resultados muestran una mejora significativa de la fluidez matemática con el uso de juegos serios en los distintos cursos y grupos-aula estudiados. La estrategia de gamificación promueve un progreso aún mayor respecto a las aulas en las que no se ha implementado. Se observa un tiempo de uso similar de los juegos serios por parte de profesores noveles y experimentados, con mejores resultados en fluidez matemática en el caso de los segundos. También se muestra la relación existente entre los resultados obtenidos y las calificaciones del alumnado. Las conclusiones señalan el potencial del uso de juegos serios diseñados específicamente para entornos escolares y cuestionan trabajos previos sobre las barreras generacionales en el profesorado.
Prendre soin, mais à quel coût ? La vulnérabilité du bénévole
Authors: Reboul Pierre 
Published: July 2021

C’est volontairement que le bénévole à l’hôpital ou en Ehpad se confronte à la souffrance d’autrui et, en retour, parfois à la sienne. Pour faire face à ce « coût du prendre soin », il fait appel à un certain nombre de ressources. Il n’en demeure pas moins quelquefois démuni et doit alors affronter différents types d’envahissements émotionnels qui peuvent aller jusqu’à expliquer et justifier son renoncement à poursuivre.
La place de l’affectivité dans la relation de soins
Authors: Kerbiriou Carole 
Published: July 2021

Trouver la juste distance dans cette relation particulière n’est pas nier ses émotions ; si je m’oublie, j’abandonne l’autre dans la relation. Pour rester soignant, il est nécessaire de rester en contact permanent avec soi. L’autre est un peu plus important que moi mais si je me perds de vue, je perds de vue l’autre et je laisse la place ouverte aux projections et aux interprétations selon mon monde, en ayant la fausse impression d’être là pour l’autre.