bluuebunny/crossref_metadata_2025 huggingface dataset:
Uma Análise da Facilidade de Emulação de Binários RISC-V
Authors: Lupori Leandro , Rosario Vanderson Martins do , Borin Edson
Published: February 2021

Cada vez mais a heterogeneidade nos ambientes como a nuvem, dispositivos móveis e Internet das Coisas, tem tornado importante a pesquisa em tradução de binários para ISAs diferentes. Grande parte das sobrecargas computacionais vem da qualidade da tradução e estão ligados com a ISA sendo traduzida. O OpenISA já se demonstrou ser fácil de emular e obteve bons desempenhos de desempenho. Nesse trabalho apresentamos resultados que indicam que o RISC-V também pode ser emulável com baixa sobrecarga de desempenho, menos de 30%.
Melhorando o Desempenho de SimPoints Utilizando Técnicas de Aprendizado de Máquina Não Supervisionado
Authors: Hamada Michelle , Fantinato Denis , Francesquini Emilio
Published: February 2021

Em pesquisas voltadas para o desenvolvimento de arquiteturas de hardware são utilizados simulações e benchmarks cujas execuções podem levar até alguns meses. A metodologia SimPoints, empregada para contornar os longos tempos de execução, é capaz de estimar os resultados da simulação de modo eficiente com alto grau de precisão. Utilizando o K-means, um número reduzido de SimPoints é escolhido automaticamente para representar a execução completa do programa. Porém, existem vias alternativas ao K-means que podem ser executadas. Neste artigo avaliaremos o uso dos Mapas Auto-Organizáveis de Kohonen na escolha dos SimPoints tendo como métrica aspectos como o tempo de execução, o número de SimPoints e a precisão da simulação.
A cost-benefit analysis of GPU-based EC2 instances for a deep learning algorithm
Authors: Malta Eva , Rodamilans Charles , Avila Sandra , Borin Edson
Published: February 2021

This paper analyzes the cost-benefit of using EC2 instances, specif- ically the p2 and p3 virtual machine types, which have GPU accelerators, to execute a machine learning algorithm. This analysis includes the runtime of a convolutional neural network executions, and it takes into consideration the necessary time to stabilize the accuracy value with different batch sizes. Also, we measure the cost of using each machine type, and we define a relation be- tween this cost and the execution time for each virtual machine. The results show that, although the price per hour of the p3 instance is three times bigger, it is faster and costs almost the same as the p2 instance type to train the deep learning algorithm.
Desenvolvimento de um Sistema de Computação para Análise de Estruturas Planas
Authors: Lobato Luanna , Bittar Thiago , Mendes Ivo , Pereira Junior Wanderlei
Published: February 2021

A Engenharia de Software tem estado presente em diferentes pesquisas em que é requerido o desenvolvimento de sistemas computacionais para otimizar, trazer qualidade e segurança nas tarefas. Neste artigo é apresentado o estudo sobre os aspectos dos sistemas CAD e a implementação de um sistema para realizar análise de estruturas planas como vigas, treliças e pórticos, voltado para o ensino no curso de Engenharia Civil. Para tanto, foram consideradas as recomendações impostas na Engenharia de Software, juntamente com as peculiaridades da Engenharia Civil, disponibilizando uma interface para a implantação de rotinas. Um estudo de caso foi aplicado para a coleta de dados, o que resultou no levantamento de melhorias do sistema.
Cinemática Inversa Aplicada a Manipulador Robótico a Partir de Coordenadas Capturadas pelo Microsoft Kinect
Authors: Zacca Flavio , Oliveira Luma , Carvalho Gabriel , Pereira Rogério , Araújo Wanderson
Published: February 2021

Em muitos processos produtivos industriais, os operadores das plantas industriais normalmente são expostos a riscos que podem comprometer a saúde e a segurança no trabalho. Este artigo apresenta uma proposta de sistema para mitigação desses riscos, utilizando manipulador robótico associado ao Microsoft Kinect, que é empregado de forma a obter as coordenadas cartesianas das articulações do braço do operador e, remotamente, aplicando cinemática inversa, atuar em um manipulador robótico que realiza o trabalho do operador e, minimizar potenciais riscos. Observou-se que o braço robótico apresentou resultado satisfatório nos quesitos de tempo de resposta e posicionamento, entretanto melhorias são necessárias na estabilidade.
Aplicação do Algoritmo de Levenberg Marquardt para Modelagem na Alocação de Potência para Usuários LTE na Faixa de 3.5 GHz com Diferentes CQI
Authors: Lopes Hudson , Rocha Flávio
Published: February 2021

Utilizando o algoritmo de Levenberg-Marquardt (LM) para estimação de parâmetros, apresentamos neste artigo as funções de utilidade sigmoidal que modelam a probabilidade de sucesso por unidade de potência consumida por um usuário. A simulação é proposta em redes móveis para os usuários localizados sob a área de cobertura das pequenas células, com uma faixa de 3,5 GHz e com diferentes Esquemas de Modulação e Codificação (MCS - Modulation and Coding Schemes) padronizados no Projeto de Parceria de Terceira Geração (3GPP - 3rd Generation Partnership Project).
Localização em Ambientes Internos Baseada em Aprendizado Supervisionado Utilizando Estações de Rádio FM
Authors: Ferreira David , Da Silva Júnior Waldir , Carvalho Celso
Published: February 2021

Para a localização de dispositivos móveis em redes sem fio, deve-se instalar três ou mais dispositivos fixos, cujos sinais transmitidos são utilizados como parâmetros de localização. O problema desta abordagem é o aumento dos custos energético e monetário. Assim, o objetivo deste trabalho é propor um método de localização utilizando estações de rádio FM com vistas ao baixo custo e alta acurácia. Foram realizados testes em ambiente doméstico com aproximadamente 30 m 2 e 15 pontos de referência. Como resultados dos testes, o método proposto QA-PCA-kNN destacou-se ao utilizar 6 características dos sinais FM, provendo a localização com erro médio de 0,0688 metros e desvio padrão de 0,2536 e, apresentando acurácia de 86,80%.
Aplicação de Simulação Monte Carlo na Análise dos Impactos da Geração Distribuída Sobre um Alimentador Radial
Authors: Corrêa Henrique , Vieira Flávio , De Castro Marcelo
Published: February 2021

Este trabalho apresenta um estudo de caso relativo à operação de um alimentador de distribuição com geração distribuída, visando-se promover uma discussão sobre a importância da modelagem probabilística na análise de siste- mas de potência com geração distribuída. O impacto sobre o perfil de tensão é analisado probabilisticamente via método Monte Carlo, considerando-se dife- rentes cenários de comprimento e carregamento do alimentador. Os resultados reforçam que, mesmo em sistemas simples, o caráter estocástico da geração distribuída não pode ser ignorado, sob pena de erros severos na modelagem.
Recomendação de Vídeos para o Processo de Aprendizagem: uma Revisão Sistemática da Literatura
Authors: Ferreira João Pedro , Campos Lívia , Marinho Neto Antonio , Pereira Junior Cleon
Published: February 2021

Este artigo trata-se de uma Revisão Sistemática da Literatura acerca da recomendação de vídeos no âmbito educacional. Com a notável expansão de conteúdos pela web, encontrar um conteúdo relevante e apropriado não é uma tarefa fácil, usuários possuem particularidades e preferências, o que torna o processo individualizado. Os sistemas de recomendação avaliam como algo é relevante para um usuário, e buscam desenvolver uma solução para efetuar uma recomendação personalizada. Foi possível com a questão de pesquisa principal, visualizar como sistemas de recomendação mostram-se eficientes na aprendizagem baseada em vídeo.
Cubo LED 3D 4X4X4
Authors: Rocha Thalita , Pereira Sara , Cardoso Junior Edinaldo , Obana Fernando , Marinho Max
Published: February 2021

Este artigo apresenta a construção de um dispositivo eletrônico controlado por software que aciona 64 LEDs dispostos em uma matriz tridimensional de dimensão 4x4x4 como abordagem para motivar alunos de um curso de Ciência da Computação nas disciplinas relacionadas a Eletrônica e Sistemas Embarcados com uso da Metodologia Ativa e da Ferramenta de Aprendizagem Baseada em Problemas (ABP). Para a construção do cubo de LEDs foram utilizados materiais recicláveis ou de fácil acesso e baixo custo em conjunto a placa de prototipagem Arduino. Foi utilizado o método de pesquisa exploratória com abordagem direta em laboratório. São apresentados o roteiro para a construção do Cubo Led e os resultados obtidos em sala de aula.
Uma Pesquisa Qualitativa sobre Características de Produtividade em Equipes de Desenvolvimento de Software
Authors: Souza Adriana , Oliveira Juliano , Moraes Daniel
Published: February 2021

Desenvolver software é uma atividade complexa e altamente dependente da colaboração entre equipes multidisciplinares. A produtividade da equipe é um fator determinante para o sucesso do desenvolvimento de software. Este trabalho analisa características que influenciam a produtividade de equipes de de software. Uma pesquisa de campo avaliou a presença dessas características em equipes que utilizam a metodologia ágil Scrum e em equipes que utilizam outras metodologias de desenvolvimento de software. A pesquisa indica que, na visão dos profissionais de software, equipes Scrum são superiores em muitas das características que impactam a sua produtividade.
Analysis of Non-Uniform Current Distribution in Multi-Fingered and Low-Voltage-Triggered LVTSCR
Authors: Zhou Zijie , Jin Xiangliang , Wang Yang , Dong Peng , Peng Yan , Luo Jun
Published: February 2021

Laterally Diffused Metal Oxide Semiconductor Silicon-Controlled Rectifier (LDMOS-SCR) is usually used in Electrostatic Discharge (ESD) protection. LDMOS-SCR discharges current by parasitic SCR, but the MOS in it cannot work when parasitic SCR is stabilized. To further enhance the Electrostatic Discharge (ESD) discharging capability of LDMOS-SCR, a novel high failure current LDMOS-SCR with 12 V operation voltage is fabricated and verified in a 0.18-um high-voltage Bipolar-CMOS-DMOS (BCD) process. Compared with conventional LDMOS-SCR, the novel LDMOS-SCR (LDMOS-SCR-R) introduced a heavily doped p-type region, which is located between the heavily doped n-type and p-type regions of Cathode and is connected with the gate. The adding p-well resistance can drop the voltage on the gate, and the gate with p-well resistance also has resistance and capacitance coupling effect. According to the results of the transmission line pulse test (TLP), the voltage applied to the gate by increasing the p-well resistance plays a major role in the device working mechanism. Under the same device size, LDMOS-SCR-R has higher It2 (8.6 A) than conventional LDMOS (2.21 A) or LDMOS-SCR (6.62 A) in TLP results. Compared with LDMOS-SCR, the failure current of LDMOS-SCR-R increases by 30 %, and the FOM of LDMOS-SCR-R increases by 34 %. The response of LDMOS-SCR-R is also faster than that of LDMOS-SCR under larger current conditions. In addition, the phenomenon in TLP results is consistent with simulation results. The proposed LDMOS-SCR-R can effectively increase failure current without affecting the device’s design window, and the additional p-type region will not increase the layout area.
A Novel Fitting Model for Practical AIS Abnormal Data Repair in Inland River
Authors: He Wei , Liu Xinlong , Chu Xiumin , Wang Zhiyuan , Fracz Pawel , Li Zhixiong
Published: February 2021

Affected by the environment of inland waterway, an Automatic Identification System (AIS) collects lots of abnormal data, which significantly reduces the inland river navigation performance using AIS data. To this end, this paper aims to restore the AIS data by repairing the lost data points. By analysing enormous abnormal AIS data, the abnormal data were firstly divided into three types, i.e., the erroneous data, short-time lost data, and long-time lost data. Then, a cubic spline interpolation method was employed to deal with the erroneous data and short-time lost data. Meanwhile, a least square support vector machine method was utilized to repair the long-time lost data. Finally, field experiments were carried out to validate the applicability of the proposed method, and it is shown that the fitting model can repair the AIS data with an accuracy of more than 90 %.
Water Resources and Their Management in an Increasing Urban Demography: The Case of Dakar City in Senegal
Authors: Faye Cheikh
Published: February 2021

The United Nations classifies Senegal as a water-poor country (less than 1000 m3 per capita of freshwater reserves) and about 20% of its population did not have access to a drinking water supply (estimates of 2015). Economic growth and the fight against poverty in Senegal depend essentially on the availability of water for the development of agricultural and industrial activities, in addition to satisfying domestic uses. As a developing country, Senegal’s human, monetary and institutional capacities are often limited to providing clean and sufficient water efficiently to its citizens. This article examines the management of water scarcity in the city of Dakar (capital of Senegal) in a context of increasing demography and urbanization. However, Senegal has sufficient water resources to meet the demand if the available resources are properly managed. As a result, several initiatives are under way in Senegal to mitigate water problems and protect the country’s water resources: reducing pollution, improving access to drinking water and setting up rational and equitable exploitation with a constant concern for sustainable development.
Perspective Chapter: A Personal Overview of Casting Processes
Authors: Campbell John
Published: February 2021

Casting processes are reviewed from the point of view of the type of defects they produce and their consequential properties of the castings they produce, particularly resistance to fracture, and therefore, their reliability in service. The ingot casting of steels is criticized for unnecessary degradation of the steel. The fundamental problems of continuous casting of aluminum alloys and steels are seen to be lying in inattention to the details of the processes. Vacuum casting, particularly vacuum arc remelting, as currently executed, is seen to be fundamentally unreliable for any safety critical purposes, particularly its history of helicopter tragedies resulting from its use in helicopter drive trains.
Vigilance entrepreneuriale du repreneur externe et mentorat : rôle de l’accompagnement en amont1
Authors: Boumedjaoud Dorian , Messeghem Karim
Published: February 2021

Lorsque le repreneur prend la direction de l’entreprise, il peut être amené à construire une stratégie repreneuriale en identifiant de nouvelles opportunités. Au cours de cette phase, il peut bénéficier d’un accompagnement sous la forme du mentorat. Pour autant, ce processus d’identification a peu été étudié par la littérature dans ce contexte. L’enjeu est de mieux comprendre les déterminants et les conséquences de l’identification des opportunités lorsque le repreneur est à la tête de son entreprise, tout en étant accompagné par un mentor. Dans cet article, nous nous focalisons sur un déterminant : la vigilance entrepreneuriale, définie comme une capacité à identifier des opportunités. Nous analysons également les conséquences de ce processus d’identification sur la performance financière. L’objectif est de mieux comprendre dans quelle mesure le moment de l’accompagnement influence la relation entre vigilance entrepreneuriale, identification des opportunités et performance financière, dans le contexte de la reprise d’entreprises. Pour cela, une étude quantitative a été menée auprès de 150 repreneurs accompagnés par un mentor. Les résultats montrent que la relation entre vigilance entrepreneuriale, identification des opportunités et performance financière est plus forte lorsque le mentorat commence avant la reprise.
Livre-cadavre : corps stigmatisés et langue de la scène dans le théâtre de Romeo Castellucci
Authors: Mercier Amandine
Published: February 2021

« Le livre est un cadavre. C’est une lettre morte, toujours et quoi qu’on fasse. Il a toujours été considéré comme une chose, un parallélépipède de papier […]. C’est en brisant le livre qu’on peut en retrouver le souffle vital » (Castellucci, 2001). Ainsi s’exprime Romeo Castellucci, metteur en scène contemporain italien, dont les créations sont marquées par l’absence ou la quasi-absence de texte sur scène. Quand texte il y a, il l’analyse avec précision et s’en sert comme matériau. Il déplace donc la notion de dramaturgie en procédant volontairement à une « destruction » du texte afin d’étouffer la langue pour la faire renaître autrement. Ainsi perçue, la scène permet à la langue de se délier, au langage de se libérer, et devient le lieu de surgissement d’une écriture nouvelle et d’une dramaturgie non textuelle mais de chair.
Réalité virtuelle et alternée dans la pratique de CREW_ERIC JORIS : mise en oscillation du corps immergé
Authors: Morin Julie-Michèle
Published: February 2021

L’artiste belge Eric Joris, directeur artistique de la compagnie de théâtre CREW, explore les codes et la grammaire de la Réalité virtuelle dans le contexte des arts vivants. L’approche de la compagnie est fondée sur une compréhension exceptionnelle des phénomènes neurocognitifs qui découlent de l’expérience immersive. Ses oeuvres explorent la dimension sensorielle du corps immergé lorsqu’il se trouve en oscillation entre les environnements naturels et artificiels. Le travail de cette compagnie souligne non pas une opposition entre deux « mondes », mais bien un relai où le corps unifie la notion de réalité. Cet article vise à expliciter les stratégies dramaturgiques mises en place dans l’écriture sensorielle de ces oeuvres où le corps spectatoriel est transformé en véritable instance scénique. En s’appuyant sur unecaptation sensoriellede l’oeuvreC.A.P.E. Brussels, cette étude rend compte des stratégies immersives et contre-immersives mobilisées par l’artiste au sein de sa pratique en « réalité alternée ».
Caravane : quête poétique et anthropologique des gestes des Amériques
Authors: Alepin Francine
Published: February 2021

Cet article présente les prémisses d’une recherche-création en cours et prend la forme d’un récit de pratique où sont présentées intuitions, hypothèses et assises théoriques qui guident le projet Caravane, une quête poétique et anthropologique des gestes des Amériques. Cette recherche-création scénique, autour des gestes liés aux cultures, s’inscrit dans une démarche interdisciplinaire en arts vivants favorisant la rencontre interculturelle et transculturelle d’artistes d’origines diverses des Amériques actuelles, lesquelles sont formées par les peuples fondateurs autochtones et par les continuelles migrations qui ont eu lieu au fil des millénaires et de l’histoire récente. La Caravane d’artistes, de mimes, d’acteur·trices et de danseur·euses participeront à une performance sans paroles, née d’un processus de création également basé sur le non verbal et le partage des gestes observés dans les divers territoires. Le regard ethnographique et poétique sur le geste lié à la culture pose les questions de l’altérité, de l’identité, de « l’être-avec » (Nancy, 2013).
Un regard sur la critique française : écrire sur la trilogie Le voile noir du pasteur de Romeo Castellucci
Authors: Cifarelli Marianna
Published: February 2021

Quel rôle le critique peut-il avoir vis-à-vis des nouveaux langages de la scène théâtrale contemporaine? Comment le critique peut-il aborder, par l’écriture, des spectacles comme ceux de Romeo Castellucci où le langage scénique proposé échappe à la technè théâtrale traditionnelle? Cet article propose d’analyser la figure et le rôle du critique-spectateur face à l’un des artistes les plus controversés. Pour ce faire, nous nous sommes intéressée en particulier à la façon dont la critique des quotidiens et des hebdomadaires français dans les années 2011-2013 a pris en charge les trois spectacles qui constituent la trilogie Le voile noir du pasteur : Sur le concept du visage du fils de Dieu (2010), Le voile noir du pasteur (2011) et The Four Seasons Restaurant (2012). Dans notre cas d’étude, le critique s’est avéré être un témoin de l’événement théâtral sans outils d’analyse aptes à traduire le langage scénique de Castellucci.
Examining the Appropriateness of Gender-Inclusion as a Humanitarian Response Mechanism for Conflict-Related Sexual Violence against Men
Authors: Akurut Catherine
Published: February 2021

This review examines the appropriateness of including men within the existing
sexual and gender-based violence programming in armed conflict settings rather
than providing services explicitly designed to address their needs. A central
premise of the paper is that men experience sexual violence differently to women
and that the way they seek help also varies. This gender-specific difference
calls into question why humanitarian organisations pursue a
‘gender-inclusion’ approach, which simply extends services
designed for women to men. There is a need to reconsider this approach, and
specifically its implementation. The paper reviews relevant secondary sources
and argues that current practices of sexual and gender-based violence
programming fail to translate into actionable responses suited for and sensitive
to men.
¿Más vale datos en mano que ciento volando?
Authors: López-Borrull Alexandre
Published: February 2021

El científico tiene nuevos retos por delante. Sí, como siempre, pensarán. Y es cierto, cuando no es la crisis (persistente, todavía), es la aparición de las tecnologías de la información y la comunicación. Y, si no, el trabajo colaborativo, el Publish or Perish (ahora ya en determinados cuartiles), el inglés, el espacio europeo, los Horizons... En todo caso, sin embargo, hablando de algunos de los nuevos retos que mencionábamos, hay dos que le obligan, más que otros, a repensar de forma muy relevante su trabajo. Los datos y la ciencia abierta. Y los mencionamos juntos porque cuando se visualizan de forma conjunta es cuando toman el sentido de disrupción que podrían tener. Sí, lo mencionamos diciendo "podrían", pues habrá que comprobar que efectivamente estos posibles cambios son bien asumidos por la comunidad científica.
¿Y de repente big data? No, nuevas competencias, evolución de ''viejas'' prácticas
Authors: Garcia Alsina Montserrat
Published: February 2021

Datos para construir información de la que extraer conocimiento es una cadena de valor que ha existido siempre. Subyace a los avances de la humanidad. Conlleva unos procesos y un tratamiento para que los datos sean fiables, actuales y pertinentes. La gestión de estos datos fundamenta la toma de decisiones. A más volúmenes de datos más precisión en la información extraída. De ahí la relevancia de las tecnologías que gestionan los datos: ERP, CRM… y big data. ¿Qué competencias y perfiles profesionales hay detrás?
Pablo Romero Sullà: ''Las audiencias ya no se miden, las audiencias se tienen''
Authors: Clares Gavilán Judith
Published: February 2021

El pasado 26 de enero entrevistamos, en el marco del Posgrado en Distribución audiovisual: VoD y nuevos modelos de negocio UOC-filmin, a Pablo Romero Sullà, Director de contenidos de Yomvi. Con él hablamos de Yomvi, de sus estrategias de programación y contenidos, y de los cambios que está viviendo la televisión con la irrupción del consumo bajo demanda.
Nuevas formas para un nuevo tiempo político
Authors: Estanyol i Casals Elisenda
Published: February 2021

La indumentaria de los diputados electos, los gestos realizados en sede parlamentaria o las fórmulas que han utilizado los políticos a la hora de prometer el cargo han puesto últimamente el foco en las formas como herramienta de comunicación del poder y, en definitiva, en el protocolo y la etiqueta.
La verdad está ahí atrás: el regreso de los X-Files y las nuevas formas del 'revival'
Authors: Roig Antoni
Published: February 2021

Hace unas pocas semanas hemos podido asistir a uno de los retornos más esperados de la televisión reciente: la nueva 'mini' temporada de la serie clave de los años noventa The X-Files (Expediente X). El objetivo de este artículo no es tanto valorar este retorno -que también- como contribuir a la reflexión sobre la importancia otorgada a la noción de revival, utilizada explícitamente en este caso, pero aplicable a toda una serie de fenómenos culturales recientes y cercanos en el cine y la televisión contemporáneas.
Comunicar sin hablar
Authors: Ollé Candela
Published: February 2021

La comparecencia de un portavoz (político), ya sea en el debate de investidura o para defender su inocencia ante las acusaciones de corrupción, puede ser un buen momento para analizar, más allá del discurso, aquello que se comunica con el lenguaje no verbal. La tendencia es analizar los personajes mediáticos, pero tener nociones de lo que se dice con la comunicación no verbal y, por tanto, saber preparar y entrenar casi la totalidad de lo que se comunica tiene gran utilidad en el día a día, desde una entrevista de trabajo hasta el aula, como docentes o estudiantes.
Pablo Romero Sullà: ''Con la irrupción del VOD ya no tiene sentido ir administrando las series a cucharaditas''
Authors: Clares Gavilán Judith
Published: February 2021

El mercado de las series se ha convertido en el gran protagonista de la televisión de pago y de los principales servicios de streaming como Netflix. En esta segunda parte de la entrevista a Pablo Romero Sullà nos explica cuáles son las estrategias de producción y programación seguidas por una televisión de pago como Movistar+, cómo se diferencian respecto a la televisión en abierto y cuáles son las estrategias que están tomando para hacer frente a la competencia de portales como Netflix, autodenominada la televisión por internet líder en el mundo.
Los cuentos chinos no son chinos
Authors: Aranda Dani
Published: February 2021

¿Podemos dejar de relacionar el videojuego comercial con violencia? ¿Qué datos manejamos para defender que jugar a videojuegos como Call of duty promueve la agresividad o la violencia? Casi ninguno, por no decir que ningún estudio científico que se considere serio y riguroso puede demostrar que existe una relación causal entre el juego digital y la violencia o la agresividad social.
Raspberry Pi, el Code Club y el movimiento maker
Authors: Cavaller Víctor
Published: February 2021

El pasado 29 de febrero del 2016, con ocasión del cuarto aniversario de las primeras ventas del Raspberry Pi 1, Eben Christopher Upton, fundador de Raspberry Pi Foundation, y actualmente CEO de Raspberry Pi (Trading) Ltd., anunció el lanzamiento de la Raspberry Pi 3 a un precio de 35 dólares. El anuncio llegó cuatro meses después de que Code Club (el 3 de noviembre del 2015) se convirtiera en una subsidiaria de la Fundación Raspberry Pi.
Gestión de la información: cuestiones candentes
Authors: Cobarsí-Morales Josep
Published: February 2021

La iConference es el principal encuentro académico mundial en gestión de la información, organizado por la red académica Information Schools. De la edición de este año podemos extraer una selección de cuestiones actuales sobre gestión de la información, preguntas a problemas que se deberán resolver en los próximos tiempos.
Proyectos terminológicos de carácter colaborativo
Authors: Vàzquez Garcia Mercè
Published: February 2021

La creación de nuevos términos en una lengua es un proceso que requiere reflexión y debate entre los distintos especialistas en la materia. Para crear nuevos términos, las lenguas tienen a su alcance varios recursos, como la adaptación de préstamos, que es una forma de dar nombre a una nueva realidad que se produce. Más allá de esta adaptación, las lenguas cuentan con una gran variedad de recursos propios para dar nombre a nuevas realidades, como la especialización, la metáfora, la habilitación y la conversión, y también la derivación, la composición, la composición culta y la sintagmación.
De cómo compartir conocimiento o crear pizzas de mármol
Authors: Sanz Martos Sandra
Published: February 2021

El pasado 9 de junio tuvo lugar la jornada Almanzora Comparte, que se ha organizado con la intención de propiciar el intercambio de experiencias y fomentar el conocimiento compartido. Ha resultado ser una oportunidad excelente para reunir a expertos, empresas e instituciones de la provincia de Almería que destacan por la innovación en la formación de sus empleados. Este artículo pretende ser un pequeño un relato o crónica de lo que allí aconteció, pero empezando por el principio, como empiezan las cosas que acaban bien.
Seremos creativos o no seremos
Authors: Sánchez-Navarro Jordi
Published: February 2021

Recientemente he tenido la oportunidad de publicar un artículo de reflexión y opinión en la sección Plaça pública del diario La Mañana editado en la ciudad de Lleida. En el artículo, titulado El espléndido futuro de la creatividad, expongo algunas ideas, propias y ajenas, sobre el valor presente y futuro de la creatividad, ideas que creo que merece la pena ampliar en este espacio de COMeIN.
Are relational processes teleological or self-referential? What relational sociology can learn from systems theory
Authors: Guy Jean-Sebastien
Published: February 2021

This paper aims at expanding on François Dépelteau's conception of social relation as dynamic processes. I argue that the basic concept of process is in need of further developments. We tend to understand processes as teleological, but I contend that self-referential processes are a more interesting model for relational sociology. Using Niklas Luhmann's theory, we can conceive self-referential processes as systems that self-organise by transforming disorder into order. For this to be possible, systems must harbour within themselves. The paper then explores the various reasons that explain this special feature.
Relations between Work-life Conflict, Job Satisfaction and Life Satisfaction among Higher Education Lecturers
Authors: Marič Miha , Todorović Ivan , Žnidaršič Jasmina
Published: February 2021

Research Question: The central research objective of this study was the empirical examination of the relationships between the construct of work-life conflict in terms of life satisfaction and job satisfaction. Motivation: Modern business environment is highly competitive and frequently demands constant participation of employees in the business tasks despite their official working hours or formal job descriptions. This practice did not spare the employees in education (Devonport, Biscomb & Lane, 2008; Salami, 2011), although they are generally satisfied with their jobs (Jordan, Miglic, Todorovic, & Maric, 2017). A healthy work environment is that in which the individual feels comfortable and respected, both as an employee and as a person with a private life that is important for individual satisfaction. As lecturers and researchers employed in higher education institutions, we wanted to examine the work-life balance among our colleagues. Idea: Our main idea was to empirically test a structural model that connects three constructs: work-life conflict, life satisfaction and job satisfaction among the higher education lecturers from different European countries and to determine the relationships by measuring the variables related to respondents from our target group through known and validated questionnaires. Data: The quantitative data for our analysis were collected through a survey of 148 online participants. The participants in this study were higher education lecturers from Austria, Croatia, the Czech Republic, Germany, Serbia and Slovenia. Tools: Work-life conflict was measured by using The work-life conflict survey (Bohen & Viveros-Long, 1981), life satisfaction by using The satisfaction with life scale (Diener, Emmons, Larsen & Griffin, 1985), and job satisfaction by using The job satisfaction survey (Spector, 1997). Findings: The results show that work-life conflict is negatively and statistically significantly related to job satisfaction and work-life conflict is negatively and statistically significantly related to life satisfaction. Affirmative and positive experiences lead towards lower work-life conflict, which consecutively imply a work and life satisfaction among the higher education lecturers. Contribution: The results of our study can be used both for further research in this area and in human resource management (HRM) practice.
Phenotype characteristics of gastric epithelial mucus in patients with different gastric diseases: from superficial gastritis to gastric cancer
Authors: Dong Nannan , Guo Rui , Gong Yuehua , Yuan Yuan
Published: February 2021

Background

Gastric gland mucin is important for maintaining the basic function of the gastric mucosa, protecting it from foreign substances and reducing the occurrence of gastric diseases. Exploring the phenotype of gastric gland mucus changes during the progression of gastric disease is of great clinical significance.

Methods

A total of 483 patients with different gastric diseases were collected in this study, including 82 superficial gastritis (SG), 81 atrophic gastritis (AG), 168 dysplasia (GD), and 152 gastric cancer (GC). Mucin staining was performed using HID-ABpH2.5-PAS method and was further grouped according to the mucin coloration.

Results

The phenotypic characteristics of mucin during disease progression were divided into neutral, acidic, and mucus-free types. Furthermore, acidic mucus can be divided into type I, type II, and type III. The SG group was dominated by neutral mucus (100%), and the AG was dominated by acid mucus (81.48%), which gradually increased with the severity of atrophy (P < 0.05). The GD and GC groups were dominated by mucus-free (43.45%, 78.29%), and as the degree of GD worsened, neutral and acidic mucus gradually decreased and mucus-free increased (P < 0.001). From the SG, AG, GD, and GC progression, neutral and acidic mucus gradually decreased, and mucus- free gradually increased. Acidic mucin revealed that type III (red-brown black) mucin was predominant in AG, GD, and GC, and increased with the degree of AG, GD, as well as the biological behavior of GC. In the lesion adjacent to high-grade GD or GC, type III acid mucin is predominant.

Conclusion

There were three mucin phenotypes in the process of gastric diseases. With the disease progression, the trend of phenotypic change was that neutral and acidic mucus gradually decreased and mucus-free increased. The appearance of type III mucin suggested a relatively serious phase of gastric diseases and may be a more suitable candidate for follow-up monitoring of patients with GC risk.
The Role of Platelet Indices in Prediction of Pre-eclampsia
Authors: Elbasuony Walaa Abdelghafar , Hodeib Hossam Abd el-mohsein , Eljejawy Adel Elshahat , Shaheen Karam Abd el-fattah
Published: February 2021

Objective: The aim of this work is to investigate the diagnostic value of platelet count (PC), mean platelet volume (MPV), the PC to MPV ratio and platelet distribution width (PDW) for prediction of pre-eclampsia (PE).

Subjects and Methods: This prospective cohort study included 100 pregnant women, in the ﬁrst trimester of pregnancy attending to University Hospital, Obstetric Outpatient Clinic, for routine obstetric care from January 2019 to December 2019. Routine obstetric follow-up consists of monthly visits until 32nd gestational week, bimonthly visits between 32nd and 36th gestational week, and weekly thereafter. Patients were classified into two groups: group I: 9 pre-eclamptic patients and group II: non pre-eclamptic 91 patients. CBC indices were measured at each planned visit

Results: PC, PC/MPV were significantly decreased, MPV and PDW were significantly increased in group I than group II at the 2nd part of pregnancy. To predict pre-eclampsia, PC at cut-off ≤214, sensitivity was 77.78, specificity was 76.92. MPV at cut-off >9.7, sensitivity was 77.78, specificity was 100.00, PC-MPV at cut-off ≤26.89, sensitivity was 88.89, specificity was 78.02. PDW at cut-off >10.4, sensitivity was 88.89, specificity was 54.95.

Conclusion: The increase in the MPV and PDW and the decrease in PC and PC/MPV were observed in preeclampsia. Thus, the platelet indices which are easily available, as well as economical, can also be used in the prediction and early diagnosis of preeclampsia.
Membrane Surface Modification by Electrospinning, Coating, and Plasma for Membrane Distillation Applications: A State‐of‐the‐Art Review
Authors: Madalosso Heloísa Bremm , Machado Ricardo , Hotza Dachamir , Marangoni Cintia
Published: February 2021

Membrane distillation (MD) is a thermally driven separation process where a hydrophobic and microporous membrane separates nonvolatile compounds. Because of its advantages, this process appears as an efficient way to recover water from industrial effluents. However, the commercial membranes used in the MD process still have operational troubles with complex industrial wastewater and against harsh operational conditions. Fouling, wetting, and low time of operation compromise the membrane function and make the total consolidation of MD technology difficult beyond the traditional application (desalination). Membrane modification can be key to mitigating these operational problems, allowing MD's expansion to complex separations. In this context, herein the main technologies to modify the membranes for MD applications of the last five years are comprehensively summarized. Three kinds of postfabrication modifications are focused on: electrospinning, coating, and plasma, including polymeric and ceramic membranes. A critical analysis of each technique is developed, discussing their potentialities and the properties achieved through them. This review enables the understanding of the operational problems of MD technology and leads to finding feasible alternatives to their mitigation. It also clarifies the evolution in membrane modification, discusses the development directions, and points out the future challenges of modifications.
Evolution of Anisotropic Arrow Nanostructures during Controlled Overgrowth
Authors: Wang Wenhui , Erofeev Ivan , Nandi Proloy , Yan Hongwei , Mirsaidov Utkur
Published: February 2021

Anisotropic metal nanoparticles (NPs), such as high‐aspect‐ratio Au nanorods (NRs), play an important role for applications in photocatalysis, sensing, and drug delivery because of their adjustable plasmon resonances. Their performance for these applications can be further improved by fine‐tuning their morphologies. Achieving desired NP architectures requires insight into their formation mechanisms. Here, liquid‐phase transmission electron microscopy is used to directly follow the overgrowth of Au NR seeds into nanoarrows (NAs) with fourfold symmetric wings along the sides. Adding thiol molecules like L‐cysteine to the growth solution can lead to the formation of NAs with periodic prismatic teeth instead of the straight side wings. These observations suggest that this transition is controlled by binding of L‐cysteine to the NR surface, which in turn, slows down the metal deposition rate, switching the overgrowth from the kinetically to thermodynamically controlled process. Furthermore, simulations demonstrate that these prismatic teeth enhance the NPs’ plasmonic properties. The study describes how thiol additives control the morphological evolution of metal NPs, which is important for the fabrication of NPs with tailored shapes for a broad range of applications.
Physical Unclonable Anticounterfeiting Electrodes Enabled by Spontaneously Formed Plasmonic Core–Shell Nanoparticles for Traceable Electronics
Authors: Li Qian , Chen Feiliang , Kang Jianbin , Su Juan , Huang Feng , Wang Pidong , Yang Xiu , Hou Yidong
Published: February 2021

Counterfeit electronics are a growing problem for the electronic information industry worldwide, so developing unbreakable security tags is crucial to ensure the trustworthiness and traceability of electronics. Traditional anticounterfeiting and trace solutions rely on reproducible deterministic processes and additional labels, which can still be copied or faked by counterfeiters. Herein, physical unclonable functions enabled by spontaneously formed plasmonic core–shell nanoparticles on electrodes are proposed to ensure label‐free traceable electronics, giving a practical solution to fight against counterfeit electronics. Random hemispherical core–shell nanoparticles are intentionally introduced on the metal electrode of different semiconductors (Si, GaAs, and GaN) from Ni/Au bilayer heterofilms by rapid thermal annealing, which can be integrated with electronics seamlessly, with no negative effect on electrical properties. The position, size, and shape of nanoparticles are random and uncontrollable; the corresponding scattering patterns, intensity, and spectra can work as nanofingerprints of the electrode, proving multidimensional unclonable labels with large encoding capacity suitable for electrodes smaller than several micrometers. It can be further combined with machine vision and artificial intelligence to identify and track electronics automatically and efficiently. The anticounterfeiting electrodes also show good thermal robustness and mechanical stability, opening up a prospect for practical anticounterfeiting of electronics.
Improving the Performance of Perovskite Solar Cells via a Novel Additive of N,1‐Fluoroformamidinium Iodide with Electron‐Withdrawing Fluorine Group
Authors: Liu Chao , Liu Shuang , Wang Yifan , Chu Yanmeng , Yang Kai , Wang Xiadong , Gao Chenxu , Wang Qifei , Du Jiankang , Li Sheng , Hu Yue , Rong Yaoguang , Guo Lianbo , Mei Anyi , Han Hongwei
Published: February 2021

Additives are widely adopted for efficient perovskite solar cells (PSCs), and proper additive design contributes a lot to PSCs’ various breakthroughs. Herein, a novel additive of N,1‐fluoroformamidinium iodide (F‐FAI), whose cation replaces one amino group in guanidinium (GA+) with electron‐withdrawing fluorine group, is synthesized and applied as the additive for PSCs. The electron‐withdrawing effect of fluorine promotes the molecular polarity of N,1‐fluoroformamidine (F‐FA), enhancing the interaction of N,1‐fluoroformamidinium (F‐FA+) with MAPbI3. Compared with the nonpolar GA+, F‐FA+ improves the crystallinity, passivates the defect, and downshifts the Fermi level of MAPbI3 more significantly. The charge transfer and built‐in field in printable triple mesoscopic PSCs are therefore enhanced. Moreover, charge transport in MAPbI3 is also promoted by F‐FAI. With these benefits, a power conversion efficiency of 17.01% for printable triple mesoscopic PSCs with improved open‐circuit voltage and fill factor is obtained with the addition of F‐FAI, superior to the efficiency of 15.24% for those devices with guanidinium iodide additives.
Hollow Molybdate Microspheres as Catalytic Hosts for Enhancing the Electrochemical Performance of Sulfur Cathode under High Sulfur Loading and Lean Electrolyte
Authors: Wang Lu , Li Guo‐Ran , Liu Sheng , Gao Xue‐Ping
Published: February 2021

Lithium–sulfur battery possesses a high energy density; however, its application is severely blocked by several bottlenecks, including the serious shuttling behavior and sluggish redox kinetics of sulfur cathode, especially under the condition of high sulfur loading and lean electrolyte. Herein, hollow molybdate (CoMoO4, NiMoO4, and MnMoO4) microspheres are introduced as catalytic hosts to address these issues. The molybdates present a high intrinsic electrocatalytic activity for the conversion of soluble lithium polysulfides, and the unique hollow spherical structure could provide abundant sites and spatial confinement for electrocatalysis and inhibiting shuttling, respectively. Meanwhile, it is demonstrated that the unique adsorption of molybdates toward polysulfides exhibits a “volcano‐type” feature with the catalytic performance following the Sabatier principle. The NiMoO4 hollow microspheres with moderate adsorption show the highest electrocatalytic activity, which is favorable for enhancing the electrochemical performance of sulfur cathode. Especially, the S/NiMoO4 composite could achieve a high areal capacity of 7.41 mAh cm−2 (906.2 mAh g−1) under high sulfur loading (8.18 mg cm−2) and low electrolyte/sulfur ratio (E/S, 4 µL mg−1). This work offers a new perspective on searching accurate rules for selecting and designing effective host materials in the lithium–sulfur battery.
3D Artificial Solid‐Electrolyte Interphase for Lithium Metal Anodes Enabled by Insulator–Metal–Insulator Layered Heterostructures
Authors: Zhai Pengbo , Wang Tianshuai , Jiang Huaning , Wan Jiayu , Wei Yi , Wang Lei , Liu Wei , Chen Qian , Yang Weiwei , Cui Yi , Gong Yongji
Published: February 2021

Despite considerable efforts to prevent lithium (Li) dendrite growth, stable cycling of Li metal anodes with various structures remains extremely difficult due to the direct contact of the liquid electrolyte with Li. Rational design of solid‐electrolyte interphase (SEI) for 3D electrodes is a promising but still challenging strategy for preventing Li dendrite growth and avoiding lithium–electrolyte side reactions in Li‐metal batteries. Here, a 3D architecture is constructed with g‐C3N4/graphene/g‐C3N4 insulator–metal–insulator sandwiched nanosheets to guide uniform Li plating/stripping in the van der Waals gap between the graphene and the g‐C3N4, and the function of which can be regarded as a 3D artificial SEI. Li deposition on the surface of g‐C3N4 is suppressed due to its insulating nature. However, its uniform lithiophilic sites and nanopore channels enable homogeneous lithium plating between the graphene and the g‐C3N4, prohibiting the direct contact of the electrolyte with the Li metal. The use of the g‐C3N4‐layer‐modified 3D anode enables long‐term Li deposition with a high Coulombic efficiency and stable cycling of full cells under high cathode loading, limited Li excess, and lean electrolyte conditions. The concept of a 3D artificial SEI will shed light on developing safe and stable Li‐metal anodes.
Designing Adaptive Binders for Microenvironment Settings of Silicon Anode Particles
Authors: Lee Haesung A. , Shin Mikyung , Kim Jaemin , Choi Jang Wook , Lee Haeshin
Published: February 2021

This study reports the concept of an “adaptive binder” to address the silicon anode challenge in Li‐ion batteries. Binders exhibit adaptable capabilities upon gradual changes in the microenvironments surrounding silicon particles during anodic expansion–shrinkage cycles. Long, flexible binder chains are repositioned and reoriented upon the gradual formation of Si‐micro‐environments (Si‐μ‐env) during the early battery cycles. At this stage, the chemical interactions between the polymeric binders are reversible hydrogen bonds. As the Si‐μ‐env become stably set by repeated battery cycles, the chemical interactions exhibit reversible‐to‐irreversible transitions by the formation of covalent linkages between the binder polymers at the later stage of cycles. The binder polymer showing the aforementioned adaptive properties is hyaluronic acid, which has never been explored as a silicon‐anode binder material, onto which the plant‐inspired adhesive phenolic moiety, gallol (1,2,3‐trihydroxybenzene), is conjugated (HA–GA) for stable adhesion to the surfaces of silicon particles. It is confirmed that the HA–GA binder can maintain a charge capacity that is approximately 3.3 times higher (1153 mAh g−1) than that of the nonconjugated HA binder (347 mAh g−1) after 600 cycles even at a rapid charge/discharge rate of 1 C (3500 mA g−1), indicating that adaptive properties are an important factor to consider in designing silicon‐anode binders.