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Resumo Neste artigo, analisamos a presença digital da Plataforma de Marketplace "Dakki Marília". A Plataforma foi criada no ano de 2020 pela Associação Comercial e de Inovação de Marília/SP (Acim) para oferecer uma experiência de ecommerce aos comerciantes impactados pela pandemia do covid-19, com o fechamento das lojas físicas. A pesquisa foi realizada com base na seguinte pergunta: qual é a presença digital da plataforma de marketplace "Dakki"? Optamos pelo método de pesquisa de natureza aplicada, com objetivos exploratórios e descritivos, e visão mista ou híbrida. Primeiramente, realizamos um levantamento bibliográfico e uma análise documental para demarcar os principais conceitos e critérios utilizados na coleta de dados da presença digital própria da Plataforma. Posteriormente, utilizamos a ferramenta Ubersuggest, de Neil Patel, para coletar os dados da presença digital espontânea e/ou própria da Plataforma. Por fim, analisamos os dados e concluímos com algumas propostas no sentido de otimizar a presença digital da Plataforma. Palavras-chave: Marketing digital. Ecommerce. Inovação. Conhecimento. Pandemia.

Mesoscale Convective Systems (MCS) are common over Europe and can produce severe weather, including extreme precipitation, which can lead to flash floods.The few studies analyzing the climatological characteristics of MCS over Europe are either based on only few years of data or focus on limited sub-areas.Using the recent Integrated Multi-satellitE Retrievals for Global Precipitation Measurement (IMERG) satellite precipitation climatology, we identify and track MCS for 16 years over Europe.We devise a spatial filter and track cells according to the overlap of filtered rain patches between consecutive time steps.By fitting an ellipse to these patches, we determine their overall shape and orientation.To distinguish convective rain patches we condition on lightning data, thus reducing potential identification errors.We analyze this new European MCS climatology to characterize MCS rainfall properties:MCS overall occur most frequently over the Mediterranean and Atlantic during fall and winter, whereas during summer, they concentrate over the continent.Typically, more than half of seasonal precipitation can be attributed to MCS, andtheir contribution to extreme precipitation is even greater, often exceeding 70\%.MCS over the continent display a clear diurnal cycle peaking during the afternoon, and some continental areas even show a second, nocturnal peak.The MCS diurnal cycle for coastal and oceanic regions is more variable.Selecting sub-areas, we find that the spatio-temporal distribution of MCS precipitation throughout the year can be well explained by the spatio-temporal distribution of specific environmental variables, namely (sea) surface temperature, fronts occurrence and convective instability.

Resumo Este artigo busca fazer o retrato de culturas de participação de jovens do ensino secundário e residentes em regiões de fronteira em Portugal continental. Essas regiões são, em geral, marcadas por desigualdades económicas, sociais e culturais que se traduzem em menores oportunidades de oferta educativa, emprego e espaços de participação. A partir de uma perspetiva da sociologia da juventude, analisam-se dados de um questionário aplicado a 3968 jovens de 38 municípios com o objetivo de mapear a participação jovem e discutir propostas para outras formas de participação às quais têm menos acesso. Os resultados apontam para algumas diferenças entre sexos e de classe social, revelando que se envolvem mais em atividades desportivas e menos em atividades de participação política e cívica. Conclui-se que os contextos aqui em análise têm uma menor diversidade de oferta de espaços de participação, que se traduz num menor envolvimento de jovens. Este trabalho aponta para a pertinência de se equacionarem modelos de participação centrados em jovens e por eles e elas protagonizados. Contribui-se, com este trabalho, para uma análise do espectro da participação jovem em contextos menos estudados como os rurais e de regiões fronteiriças. Abstract This article seeks to portray the cultures of participation of young people in secondary education and residing in border regions in mainland Portugal. These regions are, in general, marked by economic, social and cultural inequalities which translate into fewer opportunities of educational supply, employment and spaces for participation. From a sociology of youth perspective, data from a questionnaire applied to 3968 young people in 38 municipalities is analysed with the aim of mapping youth participation and discussing proposals for other forms of participation to which they have less access. The results point to some differences between sexes and social class, revealing that they get involved more in sporting activities and less in activities of political and civic participation. We conclude that the contexts analysed here have a lesser diversity of supply of spaces for participation, which translates into a lower involvement of young people. This work points to the pertinence of equating participation models centred on young people and led by them. This work contributes to an analysis of the spectrum of youth participation in less studied contexts, such as rural and border regions.

The western Maritime Continent (MC) and Southeast Asia lie at the heart of the largest area of high precipitation on Earth. Extreme precipitation is one of the major high-impact weather events to affect the population of over 500 million in this region. The deep convection associated with this extreme precipitation is difficult to forecast, even with modern high-resolution numerical weather prediction with explicit convection. However, larger-scale organised convective systems, such as the Madden–Julian Oscillation (MJO), can be skilfully predicted to 3–5 weeks lead time. The MJO has a well-known precipitation signal, and it is likely that it also modulates extreme precipitation. Here, the extreme precipitation signal of the MJO is analysed in detail for the western MC and Southeast Asia using 19 years of high-resolution Integrated Multi-satellitE Retrievals for Global Precipitation Measurement (GPM IMERG) data. The probability of experiencing extreme precipitation increases robustly by a factor of two, and decreases by a factor of half, dependent on location and the phase of the MJO. The spatial pattern of these changes in extreme precipitation does not describe a smooth eastward propagation, but shows rapid variation over short distances, tied to the complex distribution of land and sea within the archipelago. There is also a seasonal dependence of this MJO modulation in some locations. A more detailed analysis of the effect of the MJO on extreme precipitation is presented for the major cities in the region. Extreme precipitation days over the MC are generally linked with an amplification of the diurnal cycle. However, although an active MJO increases the frequency of extreme precipitation days and therefore an amplified diurnal cycle, there was no further amplification of the diurnal cycle in the active MJO, compared with extreme precipitation days during non-active MJO periods.

The Maritime Continent (MC) is a region subject to high impact weather (HIW) events, which are still poorly predicted by numerical weather prediction (NWP) models. To improve predictability of such events, NWP needs to be evaluated against accurate measures of extreme precipitation across the whole MC. With its global spatial coverage at high spatio‐temporal resolution, the Global Precipitation Measurement (GPM) data set is a suitable candidate. Here we evaluate extreme precipitation in the Integrated Multi‐Satellite Retrieval for GPM (IMERG) V06B product against station data from the Global Historical Climatology Network in Malaysia and the Philippines. We find that the high intragrid spatial variability of precipitation extremes results in large spatial sampling errors when each IMERG grid box is compared with individual co‐located precipitation measurements, a result that may explain discrepancies found in earlier studies in the MC. Overall, IMERG daily precipitation is similar to station precipitation between the 85th and 95th percentile, but tends to overestimate above the 95th. IMERG data were also compared with radar data in western Peninsular Malaysia for sub‐daily timescales. Allowing for uncertainties in radar data, the analysis suggests that the 95th percentile is still suitable for NWP evaluation of extreme sub‐daily precipitation, but that the rainfall rates diverge at higher percentiles. Hence, our overall recommendation is that the 95th percentile be used to evaluate NWP forecasts of HIW on daily and sub‐daily time scales against IMERG data, but that higher percentiles (i.e., more extreme precipitation) be treated with caution.

Extreme precipitation is ubiquitous in the Maritime Continent (MC) but poorly predicted numerical weather prediction (NWP) models. NWP evaluation against accurate measures of heavy precipitation is essential to improve their forecasting skill. Here we examine the potential utility of the Global Precipitation Measurement (GPM) Integrated Multi-Satellite Retrieval for GPM (IMERG) for NWP evaluation of extreme precipitation in the MC. For that purpose, we use radar data in Subang (Malaysia) and station data from the Global Historical Climatology Network (GHCN) in Malaysia and the Philippines. We find that earlier studies may have underestimated IMERG performances in the MC due to large spatial sampling errors of ground precipitation measurements, especially during extreme precipitation conditions. We recommend using the 95th percentile for NWP evaluation of extreme daily and sub-daily precipitation against IMERG. At higher percentiles, the IMERG rainfall rates tend to diverge from ground observation and may therefore be treated with caution.

As questões das sexualidades, em particular no que respeita à homossexualidade,continuam alicerçadas em estruturas de fragilidade em termos de produção deconhecimento. De facto, os estudos no campo educativo são ainda parcos. Tem-se,contudo, tentado pensar as sexulidades para além de uma visão que as situa apenas emcontexto escolar e num paradigma heteronormativo, onde o poder controla os discursossobre sexualidade e influencia as formas de conhecimento e de desconhecimento,promovendo assim ausências no que à homossexualidade diz respeito ou, caso contrário,criando presenças tímidas e confinadas ao discurso do combate ao bullying homofóbico,numa lógica reprodutiva das fragilidades e da dialética das sexualidades, onde a um pólodominante se subordinam as margens que se querem silenciosas. Este estudo, que envolvemetodologias quantitativas e qualitativas, nomeadamente recorrendo à etnografia, a uminquérito por questionário e a sessões de grupo de discussão focalizada, procurou darconta da visão dos/as jovens sobre os lugares/ausências efetivos/as da homossexualidadena escola, do poder da escola na construção e reprodução de [pre] conceitos, questionandoo seu papel na promoção de cidadanias a todos/as e refletindo sobre uma [possível]educação para as sexualidades, numa rutura pedagógica que procure dar voz e ser a vozde todos/as, à luz das teorias queer e da pedagogia crítica, para uma educação a e sobretodos/as. Os resultados apontam para uma visão dos/as jovens que destaca os vazios noque às sexualidades e à homossexualidade em contexto(s) escolar(es)diz respeito, numaabordagem às sexualidades, quando existente, sobretudo preventiva, bem como para umforte questionamento do papel da escola na abordagem destas temáticas, por um ladoporque do domínio da privacidade, por outro por um questionamento das própriasaprendizagens escolares.

Visualillusions and spatial disorientation are common causes of air accidents andincidents, especially during low-visibility flight conditions in smallaircraft. It is therefore essential that pilots receive training regardingadaptation of the visual and vestibular systems to the aerospace environment.This project aimed to develop a device capable of simulating different visualillusions and aspects related to central and peripheral vision (colour andvisual acuity), through the use of smartphones with OLED display technology(model: Galaxy S5 SM-G900M, screen: 5.1 inches, 1080 x 1920 pixels resolution,432 pixels per inch). The phone was coupled with augmented reality glasses(model: ColorCross 3D Virtual Reality) with a 70 mm focal length lens, supportingdevices of 4 to 6 inches. The smartphone is attached to the front of theglasses, giving an impression of three-dimensionality, and the visual tests areeither transmitted from a computer or saved on the device itself. The imagesand videos selected, such as the Farnsworth-Munsell 100 Hue Test and CambridgeColour Test, are commonly used in pilot training and are validated for use inclinical ophthalmology. Technical adaptations were necessary so these testsfunctioned adequately on the smartphone. Both tests are designed exclusivelyfor use on a computing platform and, therefore, the Trinus VR application wasfirst used to convert the computer image to 3D, before making it available onthe smartphone screen. This solution for training pilots in visual illusionsduring low-visibility flight scenarios using smartphones with OLED displays iseasy to implement, user-friendly and low-cost. Mobile technology adaptation foruse in aviation training is of great value, as it can have a positive influenceon the reduction of human errors that can result from alterations in humanphysiology secondary to exposure to the aerospace environment, thereby reducingthe occurrence of air accidents and incidents.