Visualidade computacional e fissuras do pós-digital: uma aproximação às imagens invisíveis de Trevor Paglen

Este artigo tem por objetivo descrever aspectos de uma visualidade computacional reflexivamente abordados em alguns trabalhos recentes do artista estadunidense Trevor Paglen. Buscamos, neste esforço, descrever configurações particulares da visão enquanto construto histórico e sociotécnico, que hoje seria marcado pela mediação, cada vez mais difundida, de tecnologias de visão computacional. Situamos tal questão em relação à discussão do pós-digital, categoria que visa nomear um estágio avançado de inserção das tecnologias digitais no mundo contemporâneo. Argumentamos que o trabalho de Paglen, ao abordar reflexivamente as mediações computacionais do visível, tensiona certas perspectivas da estética pós-digital que se caracterizam por uma naturalização da mediação digital e de seu abandono como categoria distintiva

Midiatização e plataformização: aproximações

This paper proposes to discuss possible relationships between theories of mediatization and platformization, a term that aims to describe both the consolidation of connective media platforms in the realm of internet and digital media, and its spreading as a model to various contemporary economic and social domains. Similarities between the concepts are identified, as well as crossings between the phenomena they aim to describe. Finally, it is suggested that the emergent subdomain of Platform Studies would offer important contributions for the topic of mediatization, with possible methodological gains.Diante do referencial teórico da midiatização, propõe-se discutir suas possíveis relações com o tema da plataformização, termo que visa descrever tanto a consolidação das plataformas de mídia conectiva no âmbito da internet e mídias digitais, quanto seu alastramento como modelo a diferentes domínios econômicos e sociais contemporâneos. Identificam-se similaridades entre os dois conceitos bem como entrecruzamentos dos fenômenos que visam descrever. Por fim, sugere-se que o subdomínio emergente dos Estudos de Plataforma ofereceria contribuições importantes ao tema da midiatização, com possíveis ganhos metodológicos

Digital Methods for Hashtag Engagement Research

UIDB/05021/2020 UIDP/05021/2020 E-26/210-047/2017 PD/BD/128252/2016This article seeks to contribute to the field of digital research by critically accounting for the relationship between hashtags and their forms of grammatization—the platform techno-materialization process of online activity. We approach hashtags as sociotechnical formations that serve social media research not only as criteria in corpus selection but also displaying the complexity of the online engagement and its entanglement with the technicity of web platforms. Therefore, the study of hashtag engagement requires a grasping of the functioning of the platform itself (technicity) along with the platform grammatization. In this respect, we propose the three-layered (3L) perspective for addressing hashtag engagement. The first contemplates potential differences between high-visibility and ordinary hashtag usage culture, its related actors, and content. The second focuses on hashtagging activity and the repurposing of how hashtags can be differently embedded into social media databases. The last layer looks particularly into the images and texts to which hashtags are brought to relation. To operationalize the 3L framework, we draw on the case of the “impeachment-cum-coup” of Brazilian president Dilma Rousseff. When cross-read, the three layers add value to one another, providing also difference visions of the high-visibility and ordinary groups.publishersversionpublishe

Salve o Cinema: o dispositivo atravessado

Este trabalho propõe uma análise do filme “Salve o cinema” (“Salaam cinema”, 1995), do diretor iraniano Mohsen Makhmalbaf, a partir de uma leitura do conceito de dispositivo. Busca-se, a partir da observação dos pontos de contato entre partes de construção e de imprevisibilidade do filme, compreender a dinâmica entre o registro e a produção dos acontecimentos. A partir das características particulares do dispositivo construído em “Salve o cinema”, indaga-se sobre a relação que ele estabelece com sua exterioridade, ultrapassando a pura contingência do acontecimento filmado e introduzindo tensões entre os regimes documental e ficciona

APIS DE VISÃO COMPUTACIONAL: INVESTIGANDO MEDIAÇÕES ALGORÍTMICAS A PARTIR DE ESTUDO DE BANCOS DE IMAGENS

O artigo apresenta resultados de estudo sobre Interfaces de Programação de Aplicações (API, na sigla em inglês) de visão computacional e sua interpretação de representações em bancos de imagens. A visão computacional é um campo das ciências da computação dedicado a desenvolver algoritmos e heurísticas para interpretar dados visuais, mas são ainda incipientes os métodos para sua aplicação ou investigação críticas. O estudo investigou três APIs de visão computacional por meio de sua reapropriação na análise de 16.000 imagens relacionadas a brasileiros, nigerianos, austríacos e portugueses em dois dos maiores bancos de imagens do ocidente. Identificamos que: a) cada API apresenta diferentes modos de etiquetamento das imagens; b) bancos de imagens representam visualidades nacionais com temas recorrentes, mostrando-se úteis para descrever figurações típicas emergentes; c) APIs de visão computacional apresentam diferentes graus de sensibilidade e modos de tratamento de imagens culturalmente específicas

The genetic architecture of the human cerebral cortex

The cerebral cortex underlies our complex cognitive capabilities, yet little is known about the specific genetic loci that influence human cortical structure. To identify genetic variants that affect cortical structure, we conducted a genome-wide association meta-analysis of brain magnetic resonance imaging data from 51,665 individuals. We analyzed the surface area and average thickness of the whole cortex and 34 regions with known functional specializations. We identified 199 significant loci and found significant enrichment for loci influencing total surface area within regulatory elements that are active during prenatal cortical development, supporting the radial unit hypothesis. Loci that affect regional surface area cluster near genes in Wnt signaling pathways, which influence progenitor expansion and areal identity. Variation in cortical structure is genetically correlated with cognitive function, Parkinson's disease, insomnia, depression, neuroticism, and attention deficit hyperactivity disorder

A História da Alimentação: balizas historiográficas

Os M. pretenderam traçar um quadro da História da Alimentação, não como um novo ramo epistemológico da disciplina, mas como um campo em desenvolvimento de práticas e atividades especializadas, incluindo pesquisa, formação, publicações, associações, encontros acadêmicos, etc. Um breve relato das condições em que tal campo se assentou faz-se preceder de um panorama dos estudos de alimentação e temas correia tos, em geral, segundo cinco abardagens Ia biológica, a econômica, a social, a cultural e a filosófica!, assim como da identificação das contribuições mais relevantes da Antropologia, Arqueologia, Sociologia e Geografia. A fim de comentar a multiforme e volumosa bibliografia histórica, foi ela organizada segundo critérios morfológicos. A seguir, alguns tópicos importantes mereceram tratamento à parte: a fome, o alimento e o domínio religioso, as descobertas européias e a difusão mundial de alimentos, gosto e gastronomia. O artigo se encerra com um rápido balanço crítico da historiografia brasileira sobre o tema

Proceedings of the 3rd Biennial Conference of the Society for Implementation Research Collaboration (SIRC) 2015: advancing efficient methodologies through community partnerships and team science

It is well documented that the majority of adults, children and families in need of evidence-based behavioral health interventionsi do not receive them [1, 2] and that few robust empirically supported methods for implementing evidence-based practices (EBPs) exist. The Society for Implementation Research Collaboration (SIRC) represents a burgeoning effort to advance the innovation and rigor of implementation research and is uniquely focused on bringing together researchers and stakeholders committed to evaluating the implementation of complex evidence-based behavioral health interventions. Through its diverse activities and membership, SIRC aims to foster the promise of implementation research to better serve the behavioral health needs of the population by identifying rigorous, relevant, and efficient strategies that successfully transfer scientific evidence to clinical knowledge for use in real world settings [3]. SIRC began as a National Institute of Mental Health (NIMH)-funded conference series in 2010 (previously titled the “Seattle Implementation Research Conference”; $150,000 USD for 3 conferences in 2011, 2013, and 2015) with the recognition that there were multiple researchers and stakeholdersi working in parallel on innovative implementation science projects in behavioral health, but that formal channels for communicating and collaborating with one another were relatively unavailable. There was a significant need for a forum within which implementation researchers and stakeholders could learn from one another, refine approaches to science and practice, and develop an implementation research agenda using common measures, methods, and research principles to improve both the frequency and quality with which behavioral health treatment implementation is evaluated. SIRC’s membership growth is a testament to this identified need with more than 1000 members from 2011 to the present.ii SIRC’s primary objectives are to: (1) foster communication and collaboration across diverse groups, including implementation researchers, intermediariesi, as well as community stakeholders (SIRC uses the term “EBP champions” for these groups) – and to do so across multiple career levels (e.g., students, early career faculty, established investigators); and (2) enhance and disseminate rigorous measures and methodologies for implementing EBPs and evaluating EBP implementation efforts. These objectives are well aligned with Glasgow and colleagues’ [4] five core tenets deemed critical for advancing implementation science: collaboration, efficiency and speed, rigor and relevance, improved capacity, and cumulative knowledge. SIRC advances these objectives and tenets through in-person conferences, which bring together multidisciplinary implementation researchers and those implementing evidence-based behavioral health interventions in the community to share their work and create professional connections and collaborations

STUDYING 'LIVE' CROSS-PLATFORM CIRCULATION OF IMAGES WITH A COMPUTER VISION API: AN EXPERIMENT BASED ON A SPORTS MEDIA EVENTd'Andréa, Carlos Frederico de Brito (Federal University of Minas Gerais, Brazil)

Considering the importance of cross-platform circulation of web contents for digital methods-oriented research, in this study we aim to expand the types of digital objects used as ‘traffic tags’ by focusing on static images as traces of online associations. We pursue this goal through a methodological experiment with Google Cloud Vision API, a computing framework for visual content analysis. Its Web Detection module pairs typical computer vision operations with Google’s search mechanism, partly performing as a more specialized batch reverse image search engine. This feature thus allows to potentially retrieve images’ spread across the web. We discuss the implications of this non-verbal methodological approach by tracking the 'live' cross-platform circulation of images shared on Twitter in the context of 2018 FIFA World Cup Final Draw ceremony, held on December 2017. Following a novel methodological protocol, we ran several iterations of Vision API processing, thus generating a time series of URLs pointing to pages in which images matching the ones being processed were found. The study analyses in depth the circulation of four popular images about the broadcasted media event, observing their ‘live’ spreading dynamics as well as the computer vision API performance. Among the findings, we point out the adoption of images as 'traffic tags' for cross-platform analysis as a promising approach to study web circulation beyond language barriers and mainstream platforms. Also, we find relevant data to discuss the specificities of the API’s algorithms and its opacity as inherent issues of the digital methods approach