showing 36 of ~574560 from 574555 documents
A Setup for Microscopic Studies of Ultrasounds Effects on Microliters Scale Samples: Analytical, Numerical and Experimental Characterization
2021
International audience; Sonoporation is the process of cell membrane permeabilization, due to exposure to ultrasounds. There is a lack of consensus concerning the mechanisms of sonoporation: Understanding the mechanisms of sonoporation refines the choice of the ultrasonic parameters to be applied on the cells. Cells’ classical exposure systems to ultrasounds have several drawbacks, like the immersion of the cells in large volumes of liquid, the nonhomogeneous acoustic pressure in the large sample, and thus, the necessity for magnetic stirring to somehow homogenize the exposure of the cells. This article reports the development and characterization of a novel system allowing the exposure to …
Enabling long-term stable FAPb1-xSrxI3 quantum dots with high optical performance: the effect of Sr2+ doping
2021
“F*** this shit” : Negotiating the Boundaries of Public Expression of Mother’s Negative Feelings
2021
In 2017, Finnish celebrity Sini Ariell published a blog post titled “F*** this shit” in which she revealed her difficult feelings as a mother of a newborn baby. Attracting attention from Finnish media, the post went viral. Through the empirical analysis of affective reactions to the post on an anonymous online discussion board, we explore how the limits of the public expression of negative maternal feelings are negotiated and maintained, but also challenged. Our results highlight the normative, even punitive dynamics of the digital intimate public, as commenters on the discussion board often argued that struggles and unhappiness during motherhood should not be made public but dealt with in …
Iodonium complexes of the tertiary amines quinuclidine and 1-ethylpiperidine
2021
Iodonium complexes incorporating tertiary amines have been synthesised to study and explore why such species comprised of alkyl amines are relatively rare. The complexes were characterised in solution (1H and 15N NMR spectroscopy) and the solid state (SCXRD), and analysed computationally. peerReviewed
A Participatory Agrobiodiversity Conservation Approach in the Oases: Community Actions for the Promotion of Sustainable Development in Fragile Areas
2021
Rural development policies today include significant directions towards ecological transition and sustainability. Biodiversity plays a fundamental role, especially in fragile environments. The North African oases, for example, are socio-ecological structures with delicate balances in terms of natural resources, where the activation of participatory conservation approaches appears today to be very useful, aiming at long-lasting results. This type of approach was applied in the oasis of El Hamma, in Tunisia. The socio-ecological analysis was carried out through semi-structured interviews with different stakeholders of the oasis. The results were used to activate focus groups and to identify, …
Reply to the Letter «A challenge for medium and small pancreatic transplant groups: How can the learning curve from the retrieval team affect the pan…
2021
Recovery of bioactive compounds from walnut (Juglans regiaL.) green husk by supercritical carbon dioxide extraction
2021
In this work, the use of supercritical carbon dioxide, a nontoxic solvent, was proposed to extract bioactive compounds from Juglans regia L. green husk and was compared to other traditional techniques based on solvents such as ethanol, methanol and water. Supercritical CO2 was combined with ethanol as an organic modifier at a rate of 20% of the total flow to achieve greater extraction of polar compounds. The extracts were characterised in terms of extraction yields, antioxidant activity, total polyphenol content, phenolic acids, juglone, volatile organic compounds and antifungal activity. The results showed that the extracts obtained with supercritical CO2 were rich in polyphenols (10750 mg…
The nested games of the UK’s EU referendum: ruptures, reconfigurations and lessons for Europe
2021
The 2016 decision by the United Kingdom to withdraw from the European Union was a seminal one for both parties. In this special issue, we consider the extent to which the inter-penetration of the national and the European arenas produced significant opportunities for recasting political action. The nesting of these two levels matters firstly in allowing for the politicisation and mobilisation of domestic actors around European issues and secondly in explaining why seemingly sub-optimal or counter-productive actions are taken. The tensions this generated reached a critical juncture with the referendum, a rupture that highlights the extent to which a nominally second-order vote can have funda…
Catalysis in Supramolecular Systems: the Case of Gel Phases
2021
Supramolecular gels are a fascinating class of materials, originated by the self-assembly of low molecular weight molecules. Underpinned by non-covalent interactions, they find application in a diverse range of fields. Among these, supramolecular gels can be considered as organized, non-conventional reaction media, able to influence reactivity in a radically different way, compared with what happens in solution. This short review will focus on this aspect, covering literature from 2010 onwards, addressing the application of supramolecular gels as reaction media. In particular, in the first section we explore organocatalytic reactions in gel phase, with wide synthetic relevance, such as aldo…
Vertical root fractures: A time-dependent clinical condition. A case-control study in two colombian populations
2021
Background This nested case-control study can be viewed as an efficient way to sample subjects from a large cohort study case-control study aimed to analyze the effect of different clinical factors on the appearance of vertical root fractures in endodontically-treated teeth (ETT) over time. Material and Methods By matching 90 cases and 270 controls nested in a cohort of 450 patients. Incident “cases” included those ETT in which a confirmed VRF. The “controls” were ETT with clinical and radiographic evidence of normality. When an “incident case” was detected, three random “controls” according to the evaluation time registered in years were selected. Time interval corresponded to the exposure…
MicroRNA Interaction Networks
2021
La tesi di Giorgio Bertolazzi è incentrata sullo sviluppo di nuovi algoritmi per la predizione dei legami miRNA-mRNA. In particolare, un algoritmo di machine-learning viene proposto per l'upgrade del web tool ComiR; la versione originale di ComiR considerava soltanto i siti di legame dei miRNA collocati nella regione 3'UTR dell'RNA messaggero. La nuova versione di ComiR include nella ricerca dei legami la regione codificante dell'RNA messaggero. Bertolazzi’s thesis focuses on developing and applying computational methods to predict microRNA binding sites located on messenger RNA molecules. MicroRNAs (miRNAs) regulate gene expression by binding target messenger RNA molecules (mRNAs). Therefo…
Il microcredito e la lotta alla povertà rurale in Camerun. Il caso del Dipartimento della Lekie
2021
Fluchten aus dem Alltag. Räume der Sehnsucht zwischen Idylle und Tourismus
2021
Bērna radošā pašizpausme vizuālajā mākslā pirmsskolā
2021
Grāmata paredzēta topošajiem skolotājiem studiju kursam Kultūras izpratnes un pašizpausmes mākslā mācību jomas saturs un mācīšanās pieejas: vizuālās mākslas metodika un praktizējošiem pirmsskolas skolotājiem, bērnu vecākiem. Grāmata palīdzēs skolotājam mērķtiecīgi organizēt pašizpausmes procesu vizuālajā mākslā, lai bērnam veidotos vispārīgās jeb caurviju prasmes, kas ietver bērna darbības kognitīvos, emocionālos un sociālos aspektus, kuri palīdz apgūt zināšanas, izpratni un pamatprasmes cilvēka darbībai nozīmīgās jomās. Grāmatas autore ir LU Pedagoģijas, psiholoģijas un mākslas fakultātes docētāja.
The ‘Shellome’ of the Crocus Clam Tridacna crocea Emphasizes Essential Components of Mollusk Shell Biomineralization
2021
Molluscan shells are among the most fascinating research objects because of their diverse morphologies and textures. The formation of these delicate biomineralized structures is a matrix-mediated process. A question that arises is what are the essential components required to build these exoskeletons. In order to understand the molecular mechanisms of molluscan shell formation, it is crucial to identify organic macromolecules in different shells from diverse taxa. In the case of bivalves, however, taxon sampling in previous shell proteomics studies are focused predominantly on representatives of the class Pteriomorphia such as pearl oysters, edible oysters and mussels. In this study, we hav…
Hvordan gjøre scenekunst med teatervitenskap
2021
This article is based on a lecture presented on the 25th of May 2018 at the conference Teatervitenskap – historiografi, teori og praksis in Bergen. This conference’s objective was to defend the section of Theatre Studies at the University of Bergen against cuts, and the lecture’s corresponding objective was to exemplify how theatre studies, besides consisting in research on performing arts, also is productively effective in creative processes of performing arts respectively in this field’s artistic research. In relation to the conference’s three focal points – historiography, theory, and practice – referred the lecture to three examples: Mette Ingvartsen’s performance 69 positions from 2014…
A Spatial Origin-Destination Analysis of International Tourism Demand. The Case of Italian Provinces
2021
Cell Association for MTC Devices in 5G Networks: Schemes and Performance Evaluation
2021
Fifth generation (5G) networks offer tremendous opportunities for Internet of things applications by facilitating massive machine-type communications (MTC). As many MTC devices are battery powered and intend to stay often in the sleep or power-saving mode, cell (re)association needs to be performed when a device wakes up. On the other hand, 5G networks are usually deployed as heterogeneous networks consisting of both macro and small cells under which a single device may be covered by multiple radio access technologies (RATs) simultaneously. Therefore, it is imperative to design effective cell association schemes for the purpose of efficient connectivity and resource utilization, especially …
Editorial
2021
Dejando atrás ya las dos primeras décadas del siglo XXI, las grandes instituciones transmiten la constante sensación de hallarse inmersas en crisis que cuestionan tanto su legitimidad actual como su supervivencia futura. Los sistemas políticos democráticos, anclados en la representación parlamentaria a través de partidos políticos elegidos en comicios periódicos abiertos al conjunto de la ciudadanía, no son ajenos a esta característica, como tampoco son capaces de escapar de ella los sistemas de medios de comunicación. La reunión científica “Democracias frágiles: polarización, populismo y desinformación en un contexto mediático híbrido”, celebrada en un escenario que uní…
Stepwise migration: What drives the relocation of migrants upon return?
2021
Kirjallisuus, digitaalisuus, ympäristöllisyys
2021
Erilaisia digiloikkia vauhdilla ottava yhteiskunta on usein herättänyt huolta niin kirjallisuudentutkijoissa kuin humanisteissa laajemminkin: onko kirjallisuudella ja muulla ”hitaalla” taiteella ja tekemisellä enää paikkaa tai tilausta? Tämä teemanumero kartoittaa kirjallisuuden, sen tutkimuksen ja digitaalisten teknologioiden läpitunkevan ympäristöllisyyden suhteita. Kirjallisuudentutkimus on otollinen ala digitalisoituvan kulttuurin ja yhteiskunnan analyysille, sillä se on lähtökohtaisesti monitieteinen tutkimusala, joka käsittelee tekstejä, niiden tuottamista ja konteksteja monista eri näkökulmista. Sen piiriin ovat aina mahtuneet niin erilaiset mediumit, toimijat kuin materiaalisuude…
false
2021
Post-tonal music often poses perceptual and cognitive challenges for listeners, potentially related to the use of relatively uncommon and unfamiliar musical material and compositional processes. As a basic compositional device, repetition affects memory for music and is structured by composers in very different ways across tonal and post-tonal musical repertoires. Of particular concern is whether post-tonal music exhibits mnemonic affordances that allow listeners to experience a sense of global coherence, and whether repetition correlates strongly with aesthetic judgment. Although previous research suggests that repetition impacts aesthetic preference, empirical research has not mapped out …
Search for trilepton resonances from chargino and neutralino pair production in s=13 TeV pp collisions with the ATLAS detector
2021
A search is performed for the electroweak pair production of charginos and associated production of a chargino and neutralino, each of which decays through an $R$-parity-violating coupling into a lepton and a $W$, $Z$, or Higgs boson. The trilepton invariant-mass spectrum is constructed from events with three or more leptons, targeting chargino decays that include an electron or muon and a leptonically decaying $Z$ boson. The analyzed dataset corresponds to an integrated luminosity of 139 fb$^{-1}$ of proton-proton collision data produced by the Large Hadron Collider at a center-of-mass energy of $\sqrt{s}$ = 13 TeV and collected by the ATLAS experiment between 2015 and 2018. The data are f…
Omaelämäkerrallinen ja digitaalinen materiaalisuus lukukäytäntöjen tutkimuksessa
2021
Lukemisen muutos, sähköiset kirjamuodot sekä painetun kirjan asema ja tulevaisuus osana lukemisen tapoja ovat aiheita, jotka herättävät keskustelua. Yksi lukemisen tapoihin vaikuttava seikka, joka jää keskusteluista usein syrjään on kirjoihin liittyvä materiaalisuus. Kirja ja lukulaite ovat esineitä, joihin yhdistetyillä aistikokemuksilla, arvoilla, asenteilla ja mielikuvilla voi olla lukijalle merkitystä. Mitä kirjojen materiaalisuus kenellekin merkitsee, on kuitenkin asia, joka vaihtelee. Keskityn tarkastelemaan artikkelissa erilaisten kokemusten taustoja materiaalisen kulttuurin tutkimuksen, erityisesti siihen liittyvien omaelämäkerrallisen materiaalisuuden ja digitaalisen materiaalisuud…
Oculto a simple vista : análisis de las comunicaciones diarias de la Conselleria de Sanidad de la Comunitat Valenciana durante la primera oleada del …
2021
Este artículo analiza la comunicación de la Conselleria de Sanidad de la Comunitat Valenciana a lo largo de la primera ola de la pandemia del coronavirus SARS-CoV-2. Se trata de un período en el que la población española estuvo sometida a un riguroso confinamiento domiciliario para mitigar la propagación del virus, y donde el interés por adquirir información al respecto de la pandemia era máximo. El objetivo de la investigación es determinar qué mensajes prevalecían en la estrategia de comunicación de la conselleria mediante el análisis de un centenar de notas de prensa, difundidas a lo largo de los meses de febrero a junio de 2020. Es decir, a lo largo de la primera ola de la pandemia en E…
Dielectric and mechanical assessment of cellulosic insulation during transformer manufacturing
2021
Due to the impact of cellulose of paper insulation on transformer life, it is imperatire to remove moisture from the oil and the solid insulation. Several techniques have been implemented during manufacturing of power transformers to reduce water content in transformers. These drying processes can involve different costs and time, and they can damage the insulation paper. In this work, a drying process has been implemented in the laboratory trying to simulate the most aggressive conditions that can be suffered by the paper in transformer manufacturing in a real industry. Once the moisture content of papers was lower than 0.5%, the effect of the drying process on paper degradation was evalua…
Reversible guest-induced gate-opening with multiplex spin crossover responses in two-dimensional Hofmann clathrates.
2021
Spin crossover (SCO) compounds are very attractive types of switchable materials due to their potential applications in memory devices, actuators or chemical sensors. Rational chemical tailoring of these switchable compounds is key for achieving new functionalities in synergy with the spin state change. However, the lack of precise structural information required to understand the chemical principles that control the SCO response with external stimuli may eventually hinder further development of spin switching-based applications. In this work, the functionalization with an amine group in the two-dimensional (2D) SCO compound {Fe(5-NH2Pym)2[MII(CN)4]} (1M, 5-NH2Pym = 5-aminopyrimidine, MII =…
Entrepreneurs' perceptions of official sporting events' capacity to promote their business in the long term
2021
[EN] Academic literature includes numerous studies on the assessment of the economic impacts of sporting events. Some of these impacts are only temporary and don't produce a lasting effect on the productive fabric, while others lead to long term developments. Even though residents' reactions to the long term impacts of these events have been broadly studied, the views expressed by entrepreneurs located in the area of the event remain to be investigated. This article analyses perceptions of entrepreneurs located near the Sierra Nevada Ski and Mountain Resort in Spain relating to their assessment of the long term effects of hosting the 2017 Snowboard and Freestyle Ski World Championship.This …
Différentes formes d’obstacles à la transition universitaire selon les vécus des étudiants : le cas des étudiants en 1ère année des licences aménagée…
2021
International audience
Relationship between pregnant women and their partners during COVID-19 and the role of accompanying persons during childbirth
2021
Objective: Although the World Health Organization (WHO) recommends the presence of a support person, several hospitals in Latvia have restricted the presence of supporting persons due to COVID-19. This study was conducted to understand the importance of partnership and the role of the accompanying person in childbirth in the context of COVID-19 in Latvia.Methods: A mixed method study with sequential explanatory design was conducted from 26 July to 30 October 2020. The quantitative study consisted of a behavioral cross-sectional online survey with convenience sampling. The survey items, methods, and implementation were performed as part of the I-SHARE study carried out in 33 countries, with …
Uso del clickbait en los medios nativos digitales españoles. Un análisis de El Confidencial, El Español, Eldiario.es y Ok Diario
2021
El clickbait es una estrategia utilizada en los medios digitales, que busca llamar la atencion a traves de los titulares, apelando a las emociones y a la curiosidad de los lectores para que cliquen en la noticia. Para indagar en este fenomeno, s e procede a estudiar a traves de una metodologia cualitativa y cuantitativa los titulares de las portadas de los cuatro principales diarios nativos digitales en Espana durante una semana (n=2505): El Confidencial , El Espanol , eldiario.es y Ok Diario . Entre los resultados de la investigacion destaca una presencia alta de titulares que contienen clickbait (48% en el computo global, ascendiendo al 69,5% en las soft news ), siendo las modificaciones …
El discurso populista de VOX en las Elecciones Generales de 2019 : análisis comparativo de las agendas temáticas en televisión y Twitter
2021
Las redes sociales y en especial Twitter han configurado nuevas formas de consumir la información política en nuestro país. No obstante, la televisión es todavía una fuente de consumo vicaria en lo que a comunicación política se refiere. Ambos medios, redes y televisión, se consolidan en España como los canales preferidos por la ciudadanía para obtener información de carácter político. El presente artículo tiene como objetivo principal conocer cuáles han sido las causas mediáticas que han llevado al partido de ultraderecha populista, VOX, a establecerse como tercera fuerza política en el Congreso de los Diputados, situándose en número de escaños por delante de Unidas Podemos y justo por det…
La comunicación política de la derecha radical en redes sociales. De Instagram a TikTok y Gab, la estrategia digital de Vox
2021
El espacio digital y las redes sociales han adquirido gran importancia en la comunicación política. Se han convertido en canales en los que los partidos difunden sus argumentarios y fidelizan a sus simpatizantes y donde los líderes demuestran su carisma. Este trabajo analiza la estrategia digital que emplea Vox en España a través de página web y sus cuentas en plataformas sociales. Mediante un análisis cualitativo y cuantitativo se estudian la página web y los perfiles de la formación en Facebook, Twitter, Telegram, Flickr, Youtube, Instagram, TikTok y Gab. El uso de estos canales difiere en su formato y estilo, ya que se dirigen a distintos perfiles de públicos, pero todo el contenido gene…
LoRa-Based Sensor Node Energy Consumption with Data Compression
2021
In this paper simple temporal compression algorithms' efficiency to reduce LoRa-based sensor node energy consumption has been evaluated and measured. It is known that radio transmission is the most energy consuming operation in a wireless sensor node. In this paper three lightweight compression algorithms are implemented in an embedded LoRa platform to compress sensor data in on-line mode and the overall energy consumption is measured. Energy consumption is compared to the situation without implementing any compression algorithm. The results show that a simple compression algorithm is an effective method to improve the battery powered sensor node lifetime. Despite the radio transmission's h…
La alteridad en el discurso de la ciencia ficción : identidad y desarraigo en Beforeigners (HBO: 2019- )
2021
La representación del miedo hacia el Otro ha sido una de las temáticas más recurrentes en el género de la ciencia ficción. En esta línea, esta investigación articula un análisis de la serie noruega Beforeigners en torno al discurso de la identidad. Desde una perspectiva cualitativa, se ha realizado un análisis textual que ha puesto de manifiesto que en la serie prevalecen los valores comunitarios y solidarios. En la discusión se han contrapuestos los resultados con otras series del género y se ha evidenciado que la serie rompe con las narrativas típicas de la ciencia ficción. Asimismo, se destaca el tono crítico de la serie hacia las políticas de inmigración de la Unión Europea. The portray…
Reconstructing Bioinvasion Dynamics Through Micropaleontologic Analysis Highlights the Role of Temperature Change as a Driver of Alien Foraminifera I…
2021
Invasive alien species threaten biodiversity and ecosystem structure and functioning, but incomplete assessments of their origins and temporal trends impair our ability to understand the relative importance of different factors driving invasion success. Continuous time-series are needed to assess invasion dynamics, but such data are usually difficult to obtain, especially in the case of small-sized taxa that may remain undetected for several decades. In this study, we show how micropaleontologic analysis of sedimentary cores coupled with radiometric dating can be used to date the first arrival and to reconstruct temporal trends of foraminiferal species, focusing on the alien Amphistegina lo…