El impacto del newsjacking en el storytelling para fomentar el crecimiento orgánico en Instagram. Caso La Tiendita Misia.

En una era digital donde existe una saturación de contenido y las redes sociales han comenzado a monetizar los KPI´s, las marcas se ven en la necesidad de usar herramientas que les permitan competir por ganar notoriedad. En ese escenario, La Tiendita Misia, marca de productos viajeros creada por las influencers peruanas “Misias Pero Viajeras”, se plantea el problema de incrementar el alcance y conversaciones orgánicas, y como consecuencia poder mejorar el engagement, con el fin de poder mejorar las ventas de la tienda online. Por lo tanto, la marca se propone aumentar la visibilidad y amplificar la audiencia para mejorar sus resultados orgánicos, sin necesidad de aumentar su inversión financiera. En este sentido, se recurre al newsjacking, también llamado “secuestro de noticias”, como parte de la estrategia para mejorar su presencia en Instagram. Esta técnica consiste en adueñarse de una noticia en tendencia para generar contenido en redes sociales, y así tomar ventaja de la ola mediática gratuita que genera. En el caso, se empleó una metodología mixta, combinando análisis cualitativos y cuantitativos para analizar tanto los comentarios como las interacciones, con el fin de evaluar la efectividad del newsjacking. Los resultados obtenidos fueron positivos, puesto que se evidenció un incremento en los KPI´s del contenido orgánico vinculado al newsjacking, lo que llevó a La Tiendita Misia a ganar visibilidad, generar más interacción, y llevar más gente a la página de venta de productos. Este trabajo demuestra que el newsjacking se presenta como una herramienta efectiva para generar crecimiento orgánico; siempre y cuando se respete el tono y comunicación de la marca.In a digital era where content saturation is prevalent and social media platforms have begun monetizing KPIs, brands find themselves needing tools that allow them to compete for visibility. In this context, La Tiendita Misia, a brand of travel products created by the Peruvian influencers "Misias Pero Viajeras," faces the challenge of increasing reach and organic conversations to ultimately improve engagement and boost online store sales. Therefore, the brand aims to enhance visibility and expand its audience to improve organic results without increasing financial investment. To this end, newsjacking is utilized as part of the strategy to improve its presence on Instagram. This technique involves capitalizing on trending news to create social media content and take advantage of the free media wave it generates. In this case, a mixed methodology was employed, combining qualitative and quantitative analysis to examine both comments and interactions, in order to assess the effectiveness of newsjacking. The results obtained were positive, as there was an evident increase in the KPIs of organic content linked to newsjacking, leading La Tiendita Misia to gain visibility, generate more interaction, and drive more traffic to the product sales page. This study demonstrates that newsjacking is an effective tool for generating organic growth, provided that the brand's tone and communication are maintained.Trabajo de suficiencia profesionalODS 8: Trabajo decente y crecimiento económicoODS 9: Industria, innovación e infraestructuraODS 12: Producción y consumo responsable

Biotic soil-plant interaction processes explain most of hysteretic soil CO2 efux response to temperature in cross-factorial mesocosm experiment

Ecosystem carbon fux partitioning is strongly infuenced by poorly constrained soil CO2 efux (Fsoil). Simple model applications (Arrhenius and Q10) do not account for observed diel hysteresis between Fsoil and soil temperature. How this hysteresis emerges and how it will respond to variation in vegetation or soil moisture remains unknown. We used an ecosystem-level experimental system to independently control potential abiotic and biotic drivers of the Fsoil-T hysteresis. We hypothesized a principally biological cause for the hysteresis. Alternatively, Fsoil hysteresis is primarily driven by thermal convection through the soil profle. We conducted experiments under normal, fuctuating diurnal soil temperatures and under conditions where we held soil temperature near constant. We found (i) signifcant and nearly equal amplitudes of hysteresis regardless of soil temperature regime, and (ii) the amplitude of hysteresis was most closely tied to baseline rates of Fsoil, which were mostly driven by photosynthetic rates. Together, these fndings suggest a more biologically-driven mechanism associated with photosynthate transport in yielding the observed patterns of soil CO2 efux being out of sync with soil temperature. These fndings should be considered on future partitioning models of ecosystem respiration.French governmentFrench National Research Agency (ANR) ANR-10-IDEX-0001-02 PSL ANR-11-INBS-0001ENSUniversity of Arizona (UofA)Philecology Foundation (Fort Worth, Texas, USA)Thomas R. Brown Family FoundationRegion Ile-de-France I-05-098/R 2011-11017735European Union (EU)National Science Foundation (NSF) 1417101 1331408European Union (EU) 625988UofA Office of Global InitiativesOffice of the Vice President of Research at the UofAUMI iGLOBES program at the Uof

Colagem de madeira de eucalipto com adesivos naturais

Taninos da casca de eucaliptos foram obtidos por meio da extração com água sob adição de 8 % de Na2CO3 ea 4% de Na2SO4, com posterior formulação de adesivos. As propriedades adesivas foram avaliadas quanto aviscosidade, densidade, teor de sólidos, tempo de formação de gel e pH dos adesivos da acácia negra a 50%,ureia 100%, de tanino da casca de eucalipto extraído com Na2CO3 a 30% e de Na2SO4 a 50%, e ureia comtaninos extraídos das cascas de eucalipto na relação de 90:10 e 80:20. Resíduos madeireiros de eucalipto(classificados em três classes de densidade: baixa, média e alta) foram colados a quente com adesivos tânicose sintético. A resistência das juntas coladas foi determinada por meio de resistência ao cisalhamento e falhana madeira. Pode-se concluir que os adesivos compostos pelo tanino extraído com sulfato de sódio e comcarbonato de sódio puros (100%) apresentaram características desejáveis para a produção de taninos, mas nãoo suficiente para sua utilização como adesivo em madeira em sua totalidade, podendo ser utilizado no enriquecimentode ureia-formaldeído na colagem da madeira. A maior resistência ao cisalhamento na madeiraocorreu na classe de densidade alta, para todos os adesivos empregados, enquanto que as maiores falhas namadeira na maioria dos adesivos testados ocorreram em madeira de baixa densidades.Palavras-chave: Resíduos madeireiros; eucalipto; adesivos naturais; taninos; colagem a quente

Eficiência da colagem em madeira de kiri japonês (Paulownia tomentosa)

The collage on pieces of wood using adhesives has been performed since the Pharaoh era. Over the years, technologies have been developed especially for adhesives and different species of wood, adapting to the desired diverse uses. In this context we can also infer the methods of analysis and its efficiency. The aim of this study was to evaluate the resistance in the glue-line by using adhesives in Paulownia tomentosa wood (Japanese kiri). The bonded joints were prepared with resorcinol formaldehyde and melamine urea formaldehyde adhesives. The wood-adhesive interface was evaluated by means of the thickness of the main and secondary glue-lines using photomicrographs, shear strength, and percentage of wood imperfections. The adhesives presented non-uniform behavior in the glue-line. It was possible to observe that the adhesives penetrated in the wood anatomical structures (elements of vessels and rays). The resorcinol formaldehyde adhesive had higher penetration values. The kiri wood imperfection percentage was greater than 92%, independent of the adhesive. The high efficiency observed in bonding with both adhesives allows the use of wood of Paulownia tomentosa in Brazil for furniture and civil construction.A colagem em peças de madeira por meio de adesivos é realizada desde a época dos faraós. Com o passar dos anos as tecnologias foram desenvolvidas sobretudo nos adesivos e nas diferentes espécies madeireiras existentes, adaptando-se aos diversos usos pretendidos. Neste contexto também se pode inferir sobre os métodos de análises de sua eficácia. O objetivo desse estudo foi avaliar a resistência na linha de cola mediante o uso de dois adesivos em madeira de Paulownia tomentosa (kiri japonês). As juntas coladas foram preparadas com adesivos resorcinol formaldeído e melamina ureia formaldeído. Avaliou-se a interface madeira-adesivo por meio da espessura da linha de cola principal e secundária com uso de fotomicrografias, resistência ao cisalhamento e percentagem de falha na madeira. Os adesivos apresentaram comportamento desuniforme ao longo da linha da cola. O adesivo resorcinol formaldeído penetrou de forma mais incisiva nos elementos de vasos e raios. A madeira de kiri apresentou percentual de falha superior a 92%, independente do adesivo. A eficiência na colagem com ambos adesivos testados possibilita o uso da madeira de Paulownia tomentosa no Brasil em movelaria e construção civil

Stress and worry in the 2020 coronavirus pandemic: Relationships to trust and compliance with preventive measures across 48 countries in the COVIDiSTRESS global survey

The COVIDiSTRESS global survey collects data on early human responses to the 2020 COVID-19 pandemic from 173 429 respondents in 48 countries. The open science study was co-designed by an international consortium of researchers to investigate how psychological responses differ across countries and cultures, and how this has impacted behaviour, coping and trust in government efforts to slow the spread of the virus. Starting in March 2020, COVIDiSTRESS leveraged the convenience of unpaid online recruitment to generate public data. The objective of the present analysis is to understand relationships between psychological responses in the early months of global coronavirus restrictions and help understand how different government measures succeed or fail in changing public behaviour. There were variations between and within countries. Although Western Europeans registered as more concerned over COVID-19, more stressed, and having slightly more trust in the governments' efforts, there was no clear geographical pattern in compliance with behavioural measures. Detailed plots illustrating between-countries differences are provided. Using both traditional and Bayesian analyses, we found that individuals who worried about getting sick worked harder to protect themselves and others. However, concern about the coronavirus itself did not account for all of the variances in experienced stress during the early months of COVID-19 restrictions. More alarmingly, such stress was associated with less compliance. Further, those most concerned over the coronavirus trusted in government measures primarily where policies were strict. While concern over a disease is a source of mental distress, other factors including strictness of protective measures, social support and personal lockdown conditions must also be taken into consideration to fully appreciate the psychological impact of COVID-19 and to understand why some people fail to follow behavioural guidelines intended to protect themselves and others from infection. The Stage 1 manuscript associated with this submission received in-principle acceptance (IPA) on 18 May 2020. Following IPA, the accepted Stage 1 version of the manuscript was preregistered on the Open Science Framework at https://osf.io/g2t3b. This preregistration was performed prior to data analysis

Familial hypercholesterolaemia in children and adolescents from 48 countries: a cross-sectional study

Background: Approximately 450 000 children are born with familial hypercholesterolaemia worldwide every year, yet only 2·1% of adults with familial hypercholesterolaemia were diagnosed before age 18 years via current diagnostic approaches, which are derived from observations in adults. We aimed to characterise children and adolescents with heterozygous familial hypercholesterolaemia (HeFH) and understand current approaches to the identification and management of familial hypercholesterolaemia to inform future public health strategies. Methods: For this cross-sectional study, we assessed children and adolescents younger than 18 years with a clinical or genetic diagnosis of HeFH at the time of entry into the Familial Hypercholesterolaemia Studies Collaboration (FHSC) registry between Oct 1, 2015, and Jan 31, 2021. Data in the registry were collected from 55 regional or national registries in 48 countries. Diagnoses relying on self-reported history of familial hypercholesterolaemia and suspected secondary hypercholesterolaemia were excluded from the registry; people with untreated LDL cholesterol (LDL-C) of at least 13·0 mmol/L were excluded from this study. Data were assessed overall and by WHO region, World Bank country income status, age, diagnostic criteria, and index-case status. The main outcome of this study was to assess current identification and management of children and adolescents with familial hypercholesterolaemia. Findings: Of 63 093 individuals in the FHSC registry, 11 848 (18·8%) were children or adolescents younger than 18 years with HeFH and were included in this study; 5756 (50·2%) of 11 476 included individuals were female and 5720 (49·8%) were male. Sex data were missing for 372 (3·1%) of 11 848 individuals. Median age at registry entry was 9·6 years (IQR 5·8-13·2). 10 099 (89·9%) of 11 235 included individuals had a final genetically confirmed diagnosis of familial hypercholesterolaemia and 1136 (10·1%) had a clinical diagnosis. Genetically confirmed diagnosis data or clinical diagnosis data were missing for 613 (5·2%) of 11 848 individuals. Genetic diagnosis was more common in children and adolescents from high-income countries (9427 [92·4%] of 10 202) than in children and adolescents from non-high-income countries (199 [48·0%] of 415). 3414 (31·6%) of 10 804 children or adolescents were index cases. Familial-hypercholesterolaemia-related physical signs, cardiovascular risk factors, and cardiovascular disease were uncommon, but were more common in non-high-income countries. 7557 (72·4%) of 10 428 included children or adolescents were not taking lipid-lowering medication (LLM) and had a median LDL-C of 5·00 mmol/L (IQR 4·05-6·08). Compared with genetic diagnosis, the use of unadapted clinical criteria intended for use in adults and reliant on more extreme phenotypes could result in 50-75% of children and adolescents with familial hypercholesterolaemia not being identified. Interpretation: Clinical characteristics observed in adults with familial hypercholesterolaemia are uncommon in children and adolescents with familial hypercholesterolaemia, hence detection in this age group relies on measurement of LDL-C and genetic confirmation. Where genetic testing is unavailable, increased availability and use of LDL-C measurements in the first few years of life could help reduce the current gap between prevalence and detection, enabling increased use of combination LLM to reach recommended LDL-C targets early in life

Robust estimation of bacterial cell count from optical density

Optical density (OD) is widely used to estimate the density of cells in liquid culture, but cannot be compared between instruments without a standardized calibration protocol and is challenging to relate to actual cell count. We address this with an interlaboratory study comparing three simple, low-cost, and highly accessible OD calibration protocols across 244 laboratories, applied to eight strains of constitutive GFP-expressing E. coli. Based on our results, we recommend calibrating OD to estimated cell count using serial dilution of silica microspheres, which produces highly precise calibration (95.5% of residuals <1.2-fold), is easily assessed for quality control, also assesses instrument effective linear range, and can be combined with fluorescence calibration to obtain units of Molecules of Equivalent Fluorescein (MEFL) per cell, allowing direct comparison and data fusion with flow cytometry measurements: in our study, fluorescence per cell measurements showed only a 1.07-fold mean difference between plate reader and flow cytometry data

Stress and worry in the 2020 coronavirus pandemic: relationships to trust and compliance with preventive measures across 48 countries in the COVIDiSTRESS global survey

The COVIDiSTRESS global survey collects data on early human responses to the 2020 COVID-19 pandemic from 173 429 respondents in 48 countries. The open science study was co-designed by an international consortium of researchers to investigate how psychological responses differ across countries and cultures, and how this has impacted behaviour, coping and trust in government efforts to slow the spread of the virus. Starting in March 2020, COVIDiSTRESS leveraged the convenience of unpaid online recruitment to generate public data. The objective of the present analysis is to understand relationships between psychological responses in the early months of global coronavirus restrictions and help understand how different government measures succeed or fail in changing public behaviour. There were variations between and within countries. Although Western Europeans registered as more concerned over COVID-19, more stressed, and having slightly more trust in the governments' efforts, there was no clear geographical pattern in compliance with behavioural measures. Detailed plots illustrating between-countries differences are provided. Using both traditional and Bayesian analyses, we found that individuals who worried about getting sick worked harder to protect themselves and others. However, concern about the coronavirus itself did not account for all of the variances in experienced stress during the early months of COVID-19 restrictions. More alarmingly, such stress was associated with less compliance. Further, those most concerned over the coronavirus trusted in government measures primarily where policies were strict. While concern over a disease is a source of mental distress, other factors including strictness of protective measures, social support and personal lockdown conditions must also be taken into consideration to fully appreciate the psychological impact of COVID-19 and to understand why some people fail to follow behavioural guidelines intended to protect themselves and others from infection. The Stage 1 manuscript associated with this submission received in-principle acceptance (IPA) on 18 May 2020. Following IPA, the accepted Stage 1 version of the manuscript was preregistered on the Open Science Framework at https://osf.io/g2t3b. This preregistration was performed prior to data analysis

Biological and abiotic regulations of soil organic matter decomposition

Les sols constituent le principal réservoir de carbone, avec près de deux fois plus de carbone que le pool atmosphérique. Afin de pouvoir prédire et anticiper le devenir du carbone dans le contexte actuel de changement climatique et de changement d'usage des terres, il apparaît nécessaire de mieux comprendre les processus qui régulent la décomposition des matières organiques dans les sols. Cette thèse se propose donc d'étudier deux types de régulateurs de la dynamique du carbone du sol : les propriétés de l'habitat microbien et celles des communautés microbiennes. En effet, puisque directement affectées par les changements climatiques d'une part, et les changements d'usage des terres et de pratiques culturales d'autre part, l'habitat microbien et les communautés microbiennes apparaissent comme des régulateurs clés de la dynamique du carbone du sol. Des dispositifs expérimentaux permettant de faire varier les propriétés de l'habitat microbien et celles des communautés microbiennes de façon indépendante ou simultanée ont été mis en place. Dans un premier temps, des microcosmes dont la structure du sol a été manipulée afin d'obtenir des gradients de déstructuration, ont été incubés. Dans un second temps ce sont des microcosmes mettant en jeu des gradients de diversité microbienne qui ont été incubés. Enfin, une incubation utilisant les différences naturelles de propriétés de l'habitat microbien et de communautés microbiennes a été mise en place pour tenter de hiérarchiser ces régulateurs de la décomposition des matières organiques du sol. Les résultats obtenus ont mis en évidence que l'activité microbienne de décomposition du carbone organique du sol semble plus contrôlée par les conditions environnementales (comme le pH, la texture et l'approvisionnement en substrat) que par la structure des communautés microbiennes ou leurs capacités métaboliques. En plus de cela, la fonction de minéralisation ne semble être affectée que dans le cas d'une très grande érosion de la biodiversité suggérant la présence d'un effet seuil, et que l'importance de la redondance fonctionnelle n'est pas toujours aussi grande que ce que le suggère de nombreuses études. D'autre part, dans des conditions d'aération suffisante, les mécanismes qui réguleraient la dynamique du carbone organique des sols se passeraient à des échelles très fines.Soils represent the principal reservoir of carbon with two times as much carbon as is found in the atmospheric pool. In an effort to better predict and anticipate how soil carbon dynamics will be affected by environmental changes and by the evolution of cropping systems, it is necessary to better understand the processes that regulate soil organic matter decomposition. This study aims to investigate two regulatory mechanisms of the soil carbon dynamic: the properties of the microbial habitat and the ones of the microbial communities. Because they are directly affected by the climatic changes and by the rapid evolution of cropping systems these two mechanisms appear to have a key role in the regulation of soil carbon decomposition. Experimental designs were setup allowing the variations, independent or simultaneous, of the properties of microbial habitat and the ones of the microbial communities. First, to assess the relative importance of soil structure, microcosms with different gradient of disaggregation were incubated. Then, to assess the relative importance of diversity erosion, microcosms with microbial diversity gradient were incubated. Finally, using contrasted soils varying in their habitats and their microbial communities properties, we aimed to hierarchize these two carbon decomposition regulatory mechanisms.The obtained results indicate that microbial activity of soil organic carbon decomposition seems to be more controlled by environmental conditions (such as pH, texture and also substrate supply) than by the microbial community structure or metabolic profiles. Then we observed that organic carbon mineralisation was impacted only when the levels of diversity were very low suggesting the existence of a threshold, and that the functional redundancy is maybe not as great as numerous studies suggest. Moreover, our work showed that when conditions of aeration in the pore system are sufficient, mechanisms regulating the dynamic of soil organic carbon take place at fine spatial scales