2,567 results on '"Daudt, A."'
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2. Effect of radiotherapy, immediate dentin sealing and irrigation simulating single- or two-visits endodontic treatment on the bond strength to pulp chamber dentin: an in vitro study
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Pauletto, Guilherme, Machry, Renan Vaz, Baumhardt, Tadeu, de Freitas Daudt, Natália, Pereira, Gabriel Kalil Rocha, and Bier, Carlos Alexandre Souza
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- 2025
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3. Spatial distribution of seabirds between the Southwest Atlantic and Southern Oceans: do all oceanic fronts influence seabird biogeography?
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Amorim, Luiza D., Daudt, Nicholas W., Sander, Martin, and Costa, Erli S.
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- 2024
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4. Ultrafast High-Temperature Sintering (UHS) of Ti and TiNb Alloys
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Libraga, Izabeli Ferrari, Schneider, Angelica Daiane, Bram, Martin, and de Freitas Daudt, Natália
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- 2024
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5. Repurposing Diffusion-Based Image Generators for Monocular Depth Estimation
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Ke, Bingxin, Obukhov, Anton, Huang, Shengyu, Metzger, Nando, Daudt, Rodrigo Caye, and Schindler, Konrad
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Computer Science - Computer Vision and Pattern Recognition - Abstract
Monocular depth estimation is a fundamental computer vision task. Recovering 3D depth from a single image is geometrically ill-posed and requires scene understanding, so it is not surprising that the rise of deep learning has led to a breakthrough. The impressive progress of monocular depth estimators has mirrored the growth in model capacity, from relatively modest CNNs to large Transformer architectures. Still, monocular depth estimators tend to struggle when presented with images with unfamiliar content and layout, since their knowledge of the visual world is restricted by the data seen during training, and challenged by zero-shot generalization to new domains. This motivates us to explore whether the extensive priors captured in recent generative diffusion models can enable better, more generalizable depth estimation. We introduce Marigold, a method for affine-invariant monocular depth estimation that is derived from Stable Diffusion and retains its rich prior knowledge. The estimator can be fine-tuned in a couple of days on a single GPU using only synthetic training data. It delivers state-of-the-art performance across a wide range of datasets, including over 20% performance gains in specific cases. Project page: https://marigoldmonodepth.github.io., Comment: CVPR 2024 camera ready
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- 2023
6. Neural Fields with Thermal Activations for Arbitrary-Scale Super-Resolution
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Becker, Alexander, Daudt, Rodrigo Caye, Metzger, Nando, Wegner, Jan Dirk, and Schindler, Konrad
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Computer Science - Computer Vision and Pattern Recognition - Abstract
Recent approaches for arbitrary-scale single image super-resolution (ASSR) have used local neural fields to represent continuous signals that can be sampled at arbitrary rates. However, the point-wise query of the neural field does not naturally match the point spread function (PSF) of a given pixel, which may cause aliasing in the super-resolved image. We present a novel way to design neural fields such that points can be queried with an adaptive Gaussian PSF, so as to guarantee correct anti-aliasing at any desired output resolution. We achieve this with a novel activation function derived from Fourier theory. Querying points with a Gaussian PSF, compliant with sampling theory, does not incur any additional computational cost in our framework, unlike filtering in the image domain. With its theoretically guaranteed anti-aliasing, our method sets a new state of the art for ASSR, while being more parameter-efficient than previous methods. Notably, even a minimal version of our model still outperforms previous methods in most cases, while adding 2-4 orders of magnitude fewer parameters. Code and pretrained models are available at https://github.com/prs-eth/thera.
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- 2023
7. High-resolution Population Maps Derived from Sentinel-1 and Sentinel-2
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Metzger, Nando, Daudt, Rodrigo Caye, Tuia, Devis, and Schindler, Konrad
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Computer Science - Computer Vision and Pattern Recognition - Abstract
Detailed population maps play an important role in diverse fields ranging from humanitarian action to urban planning. Generating such maps in a timely and scalable manner presents a challenge, especially in data-scarce regions. To address it we have developed POPCORN, a population mapping method whose only inputs are free, globally available satellite images from Sentinel-1 and Sentinel-2; and a small number of aggregate population counts over coarse census districts for calibration. Despite the minimal data requirements our approach surpasses the mapping accuracy of existing schemes, including several that rely on building footprints derived from high-resolution imagery. E.g., we were able to produce population maps for Rwanda with 100m GSD based on less than 400 regional census counts. In Kigali, those maps reach an R^2 score of 66% w.r.t. a ground truth reference map, with an average error of only about 10 inhabitants/ha. Conveniently, POPCORN retrieves explicit maps of built-up areas and of local building occupancy rates, making the mapping process interpretable and offering additional insights, for instance about the distribution of built-up, but unpopulated areas, e.g., industrial warehouses. Moreover, we find that, once trained, the model can be applied repeatedly to track population changes; and that it can be transferred to geographically similar regions, e.g., from Uganda to Rwanda). With our work we aim to democratize access to up-to-date and high-resolution population maps, recognizing that some regions faced with particularly strong population dynamics may lack the resources for costly micro-census campaigns., Comment: Accepted to Remote Sensing of Environment 2024
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- 2023
8. Prevalência de transtornos psiquiátricos em pessoas vivendo com HIV em uso de terapia antirretroviral: um estudo transversal
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Laura Galliano de Barros, Eduardo Alcantara Quidigno, and Marcelo Daudt von der Heyde
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Transtornos psiquiátricos ,AIDS ,HIV ,SIDA ,síndrome da imunodeficiência adquirida ,saúde mental ,Psychiatry ,RC435-571 - Abstract
Introdução: o desenvolvimento da terapia antirretroviral mudou o curso da infecção pelo HIV, apesar disso, o impacto psicossocial desse diagnóstico ainda influencia na saúde mental das pessoas que vivem com o vírus. Objetivos: avaliar a prevalência de transtornos psiquiátricos em pacientes soropositivos. Materiais e Métodos: estudo transversal a partir das entrevistas com pacientes soropositivos acompanhados em um ambulatório de infectologia, em Curitiba (PR). Foram coletados dados epidemiológicos e clínico-laboratoriais, e aplicados os questionários Mini International Neuropsychiatric Interview (M.I.N.I) e Questionário Breve da Qualidade de Vida da OMS (WHOQOF-abreviado). O estudo foi submetido e aprovado pelo Comitê de Ética em Pesquisas, com CAAE n° 70235123.0.0000.0020 e parecer de aprovação de número 6.134.965. Resultados: participaram 69 pacientes, cuja idade média foi de 48 ± 12,4 anos, com predomínio do sexo masculino (50,7%). Desses, 33 (47,8%) apresentaram algum transtorno psiquiátrico, sendo os transtornos mais prevalentes o transtorno depressivo e agorafobia. Nesse grupo de pacientes, percebeu-se um tempo menor que 12 anos de diagnóstico da infecção pelo HIV (p=0,026), maior uso de Efavirenz (p=0,047) e Tenofovir (p=0,048). Ainda, percebe-se uma pior avaliação da qualidade de vida, especialmente na avaliação geral, e nos domínios psicológico, social e ambiental, quando comparados ao grupo que não apresentou acometimento da saúde mental pelo questionário M.I.N.I. Outros parâmetros avaliados não parecem ter papel importante na gênese de transtornos psiquiátricos nesse grupo de pacientes. Conclusão: pacientes com HIV tem alta prevalência de doenças de ordem psíquica, e apresentam particularidades que influenciam em seu desenvolvimento, logo, é fundamental a avaliação integral desses pacientes, e a busca ativa por queixas de saúde mental.
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- 2025
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9. Detecção e isolamento de lentivírus caprino em células do cordão umbilical de cabras
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Juscilânia Furtado Araújo, Alice Andrioli, Raymundo Rizaldo Pinheiro, Renato Mesquita Peixoto, Ana Lídia Madeira de Sousa, Ana Milena Cesar Lima, Cíntia Daudt, Gabriel Paula Amaral, Samara Cristina Rocha Souza, and Maria Fátima da Silva Teixeira
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Cultivo celular ,DNA pró-viral ,Geleia de Wharton ,LVPRs ,Transmissão congênita. ,Agriculture (General) ,S1-972 - Abstract
Os lentivírus de pequenos ruminantes (LVPRs), os quais englobam os lentivírus caprino e ovino, causam danos graves à saúde dos seus hospedeiros, diminuindo consideravelmente a produção e aumentando o descarte. A via intrauterina pode ser uma importante via de transmissão de LVPRs, uma vez que já foram detectados em recém-nascidos. Ademais, células do cordão umbilical apresentam permissividade à multiplicação desses vírus in vitro. Assim, objetivou-se detectar e isolar lentivírus caprino a partir de células mesenquimais da geleia de Wharton de cordão umbilical de cabras. Coletou-se 15 cordões umbilicais de oito cabras (sete positivas e uma negativa para LVPR via nPCR) submetidas à cesariana, os quais foram imersos em solução salina a 0,9% tratada. Em seguida, retirou-se a geleia de Wharton para cultivo em meio essencial mínimo (MEM) enriquecido, em estufa a 37°C e 5% de CO2, por 63 dias. Realizou-se troca de meio a cada sete dias, e a cada 21 dias realizou-se tripsinização e coleta do sobrenadante, destinado à reação em cadeia de polimerase nested (nPCR). A partir dos resultados positivos na nPCR foram escolhidos, aleatoriamente, três amostras para sequenciamento de DNA com finalidade de identificar o isolado viral. Observou-se que 40% (06/15) dos cordões foram positivos para lentivírus caprino (Lentivirus capartenc), anteriormente denominado vírus da artrite encefalite caprina (CAEV). Dos seis cordões positivos, um permaneceu positivo desde a primeira coleta do sobrenadante. Todas as amostras, com exceção das parcelas perdidas, apresentaram destruição celular e presença de sincício variando de um nível muito leve a um nível intenso. Constatamos também que 26% (04/15) das crias, com sangue coletado ao nascimento, apresentaram resultados positivos de nPCR para lentivírus caprino. As sequências de DNA quando alinhadas, revelou homologia entre si, e com as cepas padrões CAEV Co e MVV K1514 e com alguns isolados brasileiros descritos na literatura. Conclui-se que lentivírus caprino pode estar presente em células mesenquimais da geleia de Wharton de cordão umbilical de cabras naturalmente infectadas na forma de DNA pró-viral, oferecendo o risco de contaminação fetal.
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- 2025
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10. 'Uma nação sob Deus, indivisível': a presença da providência divina nos discursos inaugurais dos presidentes dos Estados Unidos (1789-2021)
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Luciano Daudt da Rocha
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Identidade estadunidense ,Providência divina ,Discurso político estadunidense ,Discursos inaugurais ,Puritanismo ,Philosophy. Psychology. Religion ,Religions. Mythology. Rationalism ,BL1-2790 ,Religion (General) ,BL1-50 - Abstract
Este artigo tem por objetivo analisar como os temas ligados à “providência divina” foram sendo refirmados e ressignificados com o passar do tempo e, desta forma, consolidaram-se como uma das principais características da identidade estadunidense comunicada nos discursos presidenciais. Como metodologia, analisamos o conteúdo dos discursos inaugurais dos 46 presidentes da história do país, localizando e tematizando as alusões à providência divina em cada uma das falas. O texto está organizado em três seções: iniciamos discutindo as bases teóricas e metodológicas da pesquisa, apresentando os discursos inaugurais como uma documentação capaz de proporcionar uma análise em longa duração. Seguimos problematizando a constância da simbiose entre política e religião no discurso presidencial. Na sequência, analisamos a presença dos temas da providência divina nos discursos inaugurais dos 46 presidentes do país, afirmando pela sua força e permanência no discurso presidencial estadunidense. As considerações finais apontam que a simbiose entre política e religião dificulta a afirmação do Estado laico, o surgimento de projetos políticos alternativos para a sociedade estadunidense, bem como justifica as investidas imperialistas do país no sistema-mundo.
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- 2024
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11. Interactive snow avalanche segmentation from webcam imagery: results, potential, and limitations
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E. D. Hafner, T. Kontogianni, R. Caye Daudt, L. Oberson, J. D. Wegner, K. Schindler, and Y. Bühler
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Environmental sciences ,GE1-350 ,Geology ,QE1-996.5 - Abstract
For many safety-related applications such as hazard mapping or road management, well-documented avalanche events are crucial. Nowadays, despite the variety of research directions, the available data are mostly restricted to isolated locations where they are collected by observers in the field. Webcams are becoming more frequent in the Alps and beyond, capturing numerous avalanche-prone slopes. To complement the knowledge about avalanche occurrences, we propose making use of this webcam imagery for avalanche mapping. For humans, avalanches are relatively easy to identify, but the manual mapping of their outlines is time intensive. Therefore, we propose supporting the mapping of avalanches in images with a learned segmentation model. In interactive avalanche segmentation (IAS), a user collaborates with a deep-learning model to segment the avalanche outlines, taking advantage of human expert knowledge while keeping the effort low thanks to the model's ability to delineate avalanches. The human corrections to the segmentation in the form of positive clicks on the avalanche or negative clicks on the background result in avalanche outlines of good quality with little effort. Relying on IAS, we extract avalanches from the images in a flexible and efficient manner, resulting in a 90 % time saving compared to conventional manual mapping. The images can be georeferenced with a mono-photogrammetry tool, allowing for exact geolocation of the avalanche outlines and subsequent use in geographical information systems (GISs). If a webcam is mounted in a stable position, the georeferencing can be re-used for all subsequent images. In this way, all avalanches mapped in images from a webcam can be imported into a designated database, making them available for the relevant safety-related applications. For imagery, we rely on current data and data archived from webcams that cover Dischma Valley near Davos, Switzerland, and that have captured an image every 30 min during the daytime since the winter of 2019. Our model and the associated mapping pipeline represent an important step forward towards continuous and precise avalanche documentation, complementing existing databases and thereby providing a better base for safety-critical decisions and planning in avalanche-prone mountain regions.
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- 2024
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12. Impact of waitlist time on post-HSCT survival: a cohort study at a hospital in southern Brazil
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Tatiana Schnorr Silva, Jaqueline Driemeyer Correia Horvath, Mariana Pinto Pereira, Caroline Nespolo de David, Dora Fraga Vargas, Lisandra Della Costa Rigoni, Ivaine Tais Sauthier Sartor, Luciane Beatriz Kern, Priscila de Oliveira da Silva, Alessandra Aparecida Paz, Liane Esteves Daudt, and Claudia Caceres Astigarraga
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Hematopoietic stem cell transplantation ,Bone marrow transplantation ,Survival analysis ,Waitlists ,Health services accessibility ,Diseases of the blood and blood-forming organs ,RC633-647.5 - Abstract
Introduction: The time elapsed from diagnosis to hematopoietic stem cell transplantation (HSCT) is influenced by numerous factors. In Brazil, patients using the public health system are also dependent on the availability of HSCT-specific beds in the hematology ward. Objective and Methods: We conducted a cohort study of listed patients who underwent allogeneic HSCT at a Brazilian public hospital to investigate the impact of the waitlist time on post-HSCT survival. Results: The median time from diagnosis to HSCT was 19 months (IQR, 10 - 43), of which 6 months (IQR, 3 - 9) were spent on the waitlist. The time on the waitlist for HSCT appeared to influence mainly the survival of adult patients (≥ 18 years), with an increasing risk according to this time (RR, 3.53 and 95%CI, 1.81 - 6.88 for > 3 and ≤ 6 months; RR 5.86 and 95%CI, 3.26 - 10.53 for > 6 and ≤ 12 months, and; RR 4.24 and 95%CI, 2.32 - 7.75 for > 12 months). Conclusion: Patients who remained on the waitlist for less than 3 months had the highest survival (median survival, 856 days; IQR, 131 - 1607). The risk of reduced survival was about 6-fold higher (95%CI, 2.8 - 11.5) in patients with malignancies.
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- 2024
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13. Continuous infusion of magnesium sulfate to treat acute severe asthma in a Brazilian pediatric emergency department
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Daniele de Ávila Dalmora, Patrícia Miranda Lago, Jordana Vaz Hendler, Milton Gross Junior, Juliana Ritondale Sodré de Castro, João Carlos Batista Santana, and Liane Esteves Daudt
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asthma ,drug-related side effects and adverse reactions ,magnesium sulfate ,medicine ,pediatric emergency ,treatment outcome ,Medicine - Abstract
Purpose : Magnesium sulfate (MgSO4) emerged as an adjunctive therapy to help manage acute severe asthma refractory to the first-line therapy, such as oxygen, ipratropium, corticosteroids, and bronchodilators. Despite the known benefits of MgSO4, limited information is available regarding potential adverse effects (AEs). We aimed to investigate potential AEs and clinical response of intravenous MgSO4 by assessing vital signs and the modified Wood-Downes score (mWDS), a relevant clinical scoring system. Methods : This investigation constitutes a prospective, single-arm study, conducted from June 2022 through May 2023, in a pediatric emergency department of the quaternary public hospital in Brazil. This study included all children aged 3-14 years who visited the pediatric emergency department during the period and underwent a 6-hour continuous infusion of MgSO4 at 50 mg/kg/hour, against acute severe asthma, a case refractory to the first-line therapies. We evaluated the safety and efficacy of the infusion by using vital signs and the mWDS. Clinical response was defined as a reduction of at least 1 point in the scoring system. Results : We analyzed a total of 42 children including 24 boys (57.1%), whose mean age was 5.7 ± 2.4 years. The 6-hour continuous infusion of MgSO4 reduced mWDS from 3 (interquartile range, 3-4) to 2 (2-3) (P < 0.001) and resulted in the clinical response in 30 children (71.4%) without an AE. After the infusion, 13 of the 15 children (86.7%) classified as having moderate asthma exacerbation (mWDS, 4-6) were improved to having mild asthma exacerbation (mWDS, 1-3) (P < 0.001). The mean serum magnesium concentration after the infusion was 4.7 mg/dL. Pneumonia and viral infection did not predict the clinical response. Conclusion : This study indicates the safety and efficacy of the 6-hour continuous infusion of MgSO4 as a therapeutic option for acute severe asthma, which is refractory to the first-line therapy.
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- 2024
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14. BiasBed -- Rigorous Texture Bias Evaluation
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Kalischek, Nikolai, Daudt, Rodrigo C., Peters, Torben, Furrer, Reinhard, Wegner, Jan D., and Schindler, Konrad
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Computer Science - Computer Vision and Pattern Recognition ,Computer Science - Machine Learning - Abstract
The well-documented presence of texture bias in modern convolutional neural networks has led to a plethora of algorithms that promote an emphasis on shape cues, often to support generalization to new domains. Yet, common datasets, benchmarks and general model selection strategies are missing, and there is no agreed, rigorous evaluation protocol. In this paper, we investigate difficulties and limitations when training networks with reduced texture bias. In particular, we also show that proper evaluation and meaningful comparisons between methods are not trivial. We introduce BiasBed, a testbed for texture- and style-biased training, including multiple datasets and a range of existing algorithms. It comes with an extensive evaluation protocol that includes rigorous hypothesis testing to gauge the significance of the results, despite the considerable training instability of some style bias methods. Our extensive experiments, shed new light on the need for careful, statistically founded evaluation protocols for style bias (and beyond). E.g., we find that some algorithms proposed in the literature do not significantly mitigate the impact of style bias at all. With the release of BiasBed, we hope to foster a common understanding of consistent and meaningful comparisons, and consequently faster progress towards learning methods free of texture bias. Code is available at https://github.com/D1noFuzi/BiasBed
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- 2022
15. Guided Depth Super-Resolution by Deep Anisotropic Diffusion
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Metzger, Nando, Daudt, Rodrigo Caye, and Schindler, Konrad
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Computer Science - Computer Vision and Pattern Recognition ,Computer Science - Artificial Intelligence - Abstract
Performing super-resolution of a depth image using the guidance from an RGB image is a problem that concerns several fields, such as robotics, medical imaging, and remote sensing. While deep learning methods have achieved good results in this problem, recent work highlighted the value of combining modern methods with more formal frameworks. In this work, we propose a novel approach which combines guided anisotropic diffusion with a deep convolutional network and advances the state of the art for guided depth super-resolution. The edge transferring/enhancing properties of the diffusion are boosted by the contextual reasoning capabilities of modern networks, and a strict adjustment step guarantees perfect adherence to the source image. We achieve unprecedented results in three commonly used benchmarks for guided depth super-resolution. The performance gain compared to other methods is the largest at larger scales, such as x32 scaling. Code (https://github.com/prs-eth/Diffusion-Super-Resolution) for the proposed method is available to promote reproducibility of our results., Comment: 8 main pages, Accepted to CVPR2023
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- 2022
16. Fine-grained Population Mapping from Coarse Census Counts and Open Geodata
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Metzger, Nando, Vargas-Muñoz, John E., Daudt, Rodrigo C., Kellenberger, Benjamin, Whelan, Thao Ton-That, Ofli, Ferda, Imran, Muhammad, Schindler, Konrad, and Tuia, Devis
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Computer Science - Machine Learning ,Computer Science - Computer Vision and Pattern Recognition ,Statistics - Applications - Abstract
Fine-grained population maps are needed in several domains, like urban planning, environmental monitoring, public health, and humanitarian operations. Unfortunately, in many countries only aggregate census counts over large spatial units are collected, moreover, these are not always up-to-date. We present POMELO, a deep learning model that employs coarse census counts and open geodata to estimate fine-grained population maps with 100m ground sampling distance. Moreover, the model can also estimate population numbers when no census counts at all are available, by generalizing across countries. In a series of experiments for several countries in sub-Saharan Africa, the maps produced with POMELOare in good agreement with the most detailed available reference counts: disaggregation of coarse census counts reaches R2 values of 85-89%; unconstrained prediction in the absence of any counts reaches 48-69%.
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- 2022
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17. k-Robust Conflict-Based Search with Continuous time for Multi-robot Coordination.
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Guilherme Daudt, Alleff Dymytry, Mariana Kolberg, and Renan Maffei
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- 2024
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18. A Divide-by-1.5/2 Prescaler Utilizing Double Data Rate Technique.
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Lucas Daudt Franck, João Navarro, and João Paulo Carmo
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- 2024
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19. Repurposing Diffusion-Based Image Generators for Monocular Depth Estimation.
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Bingxin Ke, Anton Obukhov, Shengyu Huang, Nando Metzger, Rodrigo Caye Daudt, and Konrad Schindler
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- 2024
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20. Estimating Fine-Grained Population Growth Rates from Coarse Census Data.
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John E. Vargas-Muñoz, Nando Metzger, Rodrigo Caye Daudt, Konrad Schindler, and Devis Tuia
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- 2024
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21. Recognition of Unseen Bird Species by Learning from Field Guides.
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Andrés C. Rodríguez, Stefano D'Aronco, Rodrigo Caye Daudt, Jan D. Wegner, and Konrad Schindler
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- 2024
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22. Representações de masculinidades em contextos educacionais: uma revisão integrativa
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Eduardo dos Santos Henrique, Luciano Daudt da Rocha, and Ediane da Silva
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Representações de Masculinidade ,Relações de Gênero ,Educação ,Education - Abstract
O objetivo deste artigo é analisar como as representações de masculinidades aparecem nas pesquisas relacionadas ao contexto educacional brasileiro, na literatura publicada no formato de artigos científicos, entre 2018 e 2024. Para tanto, procedeu-se a uma revisão integrativa (Kramm, 2019), cujos dados foram examinados via análise de conteúdo (Bardin, 2015) e interseccionalidade (Collins, 2020). Três categorias emergiram: Diferença e valorização do padrão; Ausência e silenciamento; e Resistência e ressignificação. Elas foram discutidas à luz de perspectivas teóricas decoloniais (Castro-Goméz, 2007; Lugones, 2018; Mignolo, 2008). A análise indica que as representações de masculinidades estão majoritariamente alinhadas ao padrão cis-heterossexista, branco e elitizado. Constatou-se a ausência de discussões sobre gênero e sexualidade, principalmente nas escolas, dificultando a abordagem dessas temáticas. Apesar disso, o panorama educacional brasileiro, longe de ser neutro, também abriga masculinidades que desafiam normas, criando resistências e possibilidades de reverter quadros opressores.
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- 2024
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23. Perfil dos preceptores de programas de residência em saúde em especialização: estudo transversal
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Brenda Wander, Carmen Vera Giacobbo Daudt, Alessandra Tavares Francisco Fernandes, and Ana Paula Tussi Leite
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Preceptoria ,Internato e residência ,Internato não médico. ,Public aspects of medicine ,RA1-1270 - Abstract
RESUMO Este estudo objetivou caracterizar o perfil dos preceptores que iniciaram um curso de especialização em Preceptoria Multiprofissional na Área da Saúde. Trata-se de um estudo transversal de abordagem quantitativa. Ao início do curso (2022), os preceptores matriculados foram convidados a responder ao questionário eletrônico com questões de múltipla escolha, que abordavam dados pessoais, da formação e da atuação. Dos matriculados, 1.112 (71,23%) responderam ao questionário. A maioria é do sexo feminino (84,8%), tem entre 31 e 50 anos, e atua em programas de residência multiprofissional, no nível terciário de atenção à saúde. A área de graduação predominante é a enfermagem (35,61%), seguida pela fisioterapia e medicina. Houve uma maior proporção de preceptores da região Sudeste, seguida pelas regiões Nordeste e Norte. Apenas 35,25% cursaram residência, e 136 preceptores não cursaram residência nem outra pós-graduação. Poucos estão envolvidos em pesquisa (3,5%). A maioria não tem plano de carreira e não recebe bolsa complementar. Os resultados podem auxiliar na construção e no monitoramento de políticas públicas relacionadas à formação de preceptores e às residências em saúde, evidenciando necessidades como ampliação das oportunidades de formação, inclusive em residências, valorização da carreira do preceptor e incentivo à pesquisa.
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- 2024
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24. GENETIC POLYMORPHISMS RELATED TO PEG-ASPARAGINASE HYPERSENSITIVITY IN THE BRAZILIAN PEDIATRIC POPULATION
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DK Cecconello, KAS Silva, ECM Senna, MM Lins, IMQS Magalhães, AVL Sousa, C Rechenmacher, LE Daudt, and MB Michalowski
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Diseases of the blood and blood-forming organs ,RC633-647.5 - Abstract
Introduction/Objective: PEG-Asparaginase (PEG-ASNase) is critical in treating pediatric acute lymphoblastic leukemia (ALL). However, hypersensitivity reactions and inactivations associated with ASNase are major patient challenges. The detection of single nucleotide polymorphisms (SNPs), which recognize, in advance, patients who will develop hypersensitivity to ASNase, would help to optimize treatment. To describe pharmacogenetic variations influencing hypersensitivity to PEG-ASNase and their correlation with our patient population. Material and methods: We conducted a prospective multicenter study involving ALL patients under 18 years old receiving PEG-ASNase. Genotyping was carried out for 6 SNPs, which are more frequently related to hypersensitivity in other populations, including GRIA1 rs4958351, NFACT2 rs6021191, MYBBP1A rs3809849, CNOT3 rs73062673, GR1A1 rs6890057 and HLA-DQB1 rs1694129. The tests were performed using custom TaqMan® SNP genotyping assays. Results: A total of 305 patients were included, with 10.8% experiencing clinical allergic reactions and (14.1%) patients with inactivation (ASNase activity < 0.1 IU/mL). Genotypic distribution and Hardy-Weinberg equilibrium (HWE) for studied SNPs were as follows: GRIA1 rs4958351 (GG 59.1%, GA 32.6%, AA 8.3%, HWE = 0.06); NFACT2 rs6021191 (AA 89.8%, AT 9.8%, TT 4%, HWE = 0.74); MYBBP1A rs3809849 (GG 60.7%, GC 35.3%, CC 4%, HWE = 0.55); CNOT3 rs73062673 (TT 69.8%, TC 26.4%, CC 3.7%, HWE = 0.34); GR1A1 rs6890057 (CC 70.6%, CT 25.5%, TT 3.9%, HWE = 0.22); HLA-DQB1 rs1694129 (GG 83%, GT 16.5%, TT 4%, HWE = 0.55). No correlation was found between clinical allergic reactions and inactivation with SNPs (p > 0.01). Discussion: Our analysis characterized the pharmacogenetic polymorphisms in our population, reflecting diversity similar to the general population. Despite the lack of correlation between the studied SNPs and allergic reactions observed in our sample, we encourage further exploration to identify additional SNPs associated with hypersensitivity. Conclusion: These findings lay the groundwork for future research to uncover new genetic predictors of hypersensitivity, which could contribute to the development of personalized treatment approaches and the prevention of allergic reactions.
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- 2024
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25. TOWARD OPTIMIZED TREATMENT: INCIDENCE OF HYPERSENSITIVITY REACTIONS AND INACTIVATIONS IN BRAZILIAN CHILDREN RECEIVING PEG-ASPARAGINASE FOR ACUTE LYMPHOBLASTIC LEUKEMIA
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KAS Silva, DK Cecconello, ECM Senna, LA Carlotto, LM Cristofani, LBP Moreira, MLLC Brito, C Rechenmacher, LE Daudt, and MB Michalowski
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Diseases of the blood and blood-forming organs ,RC633-647.5 - Abstract
Introduction: PEG asparaginase (PEG-ASNase) is an essential drug in the treatment of acute lymphoblastic leukemia (ALL). However, asparaginase-related hypersensitivity and silent inactivation continue to represent clinical challenges. Objective: Describe the incidence of hypersensitivity reactions and inactivations associated with PEG-ASNase in Brazilian children undergoing first-line treatment for ALL. Material and methods: Prospective, multicenter and randomized trial. Patients younger than 18 years with ALL who received PEG-ASNase between February 2021 and February 2024 in eigth differents hospitals were included. ASNase activity was monitored in all patients 7 days and 14 days after each PEG-ASNase. Results: 305 patients were included. 33 (10.8%) patients had clinical allergic reactions and 43 (14.1%) patients had inactivation (asparaginase activity < 0.1 IU/mL). Among those who had allergic reactions, 45.5% also inactivated the drug. There was a significant association between clinical allergic reaction and inactivation (p < 0.001). However, among those who inactivated, 65% did not have an allergic reaction. The silent inactivation rate was 9.2% (n = 28). Conclusions: Our findings are consistent with the literature, underscoring the importance of therapeutic monitoring of asparaginase for all patients. We aim to further contribute to the treatment of children with ALL by investigating the influence of pre-medication on inactivation and hypersensitivity reactions.
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- 2024
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26. AVALIAÇÃO DE CUSTO-EFETIVIDADE DO BLINATUMOMABE VERSUS QUIMIOTERAPIA CONVENCIONAL EM CRIANÇAS COM LEUCEMIA LINFOBLÁSTICA AGUDA RECIDIVANTE
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GGD Monte, C Rechenmacher, AV Pinhatti, VP Lopes, G Balbinotto-Neto, MB Michalowski, and LE Daudt
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Diseases of the blood and blood-forming organs ,RC633-647.5 - Abstract
Objetivos: Avaliar, com dados de mundo real, o custo-efetividade do Blinatumomabe em crianças com Leucemia Linfoblástica Aguda (LLA) B recidivante em comparação com a quimioterapia padrão. Este estudo visa fornecer dados comparáveis sobre a melhor alocação de recursos na ausência de informações sobre vantagem farmacoeconômica com dados de vida real e QALY do tratamento em crianças com LLA recidivante e imunoterapia no Brasil. Material e métodos: Estudo com amostra de conveniência de coorte retrospectivo com controle histórico desenvolvido no Hospital de Clínicas de Porto Alegre com dados de vida real. Critérios de inclusão: crianças (> 28 dias e < 18 anos) diagnosticadas com LLA B de alto risco em primeira recaída, tratadas de acordo com o protocolo IntReALL que incluiu indução e duas consolidações, seguidas de quimioterapia ou blinatumomabe. Os pacientes foram identificados através de banco de dados de pacientes da unidade de hematologia pediátrica. Foram incluídas 13 crianças, sendo 7 no braço intervenção (Blinatumomabe) e 6 no braço controle (quimioterapia) tratados na instituição. A análise farmacoeconômica foi baseada na eficiência, com a inclusão dos cálculos de custo. Para isso, utilizamos o modelo MARKOV com o uso do programa de computador TREEAGE. As variáveis analisadas foram os custos referentes a diária do paciente internado no hospital, os exames realizados, os medicamentos administrados, hemoterapia e insumos. Resultados: O Blinatumomabe mostrou-se mais eficaz que a quimioterapia em termos de QALY, com um ganho incremental de 3,22 anos de vida ajustados pela qualidade. Embora o Blinatumomabe tenha custo incremental de R$ 340.490,07, a análise de custo-efetividade indica que o Blinatumomabe é custo-efetivo em comparação à quimioterapia, com custo por QALY de R$ 105.742,26, valor abaixo do limite de custo-efetividade para o Brasil (R$ 126.742,56). Discussão: Apesar do custo mais elevado, o Blinatumomabe proporciona benefícios substanciais em anos de vida e qualidade de vida ajustada. A Razão de Custo-Efetividade Incremental e a Razão de Custo-Utilidade Incremental indicam que o Blinatumomabe é uma opção custo-efetiva, sendo uma preferível para pacientes que podem se beneficiar de anos adicionais de vida com melhor qualidade. Conclusão: Este estudo sugere que o tratamento com Blinatumomabe, apesar de ter custo imediato superior a quimioterapia convencional, proporciona benefícios significativos em termos de anos de vida adicionais e qualidade de vida ajustada. As razões de custo-efetividade incremental e custo-utilidade incremental destacam que o Blinatumomabe é uma opção custo-efetiva para o tratamento. Decisores de políticas de saúde podem considerar esses resultados para cálculo de impacto orçamentário e melhorias de médio e longo prazo na saúde pública.
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- 2024
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27. LINFOMA DE CÉLULAS T HELPER FOLICULAR NODAL EM PACIENTE PEDIÁTRICO: RELATO DE CASO
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RDG Leite, EMA Gamboa, ACK Torrani, MB Michalowski, and LE Daudt
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Diseases of the blood and blood-forming organs ,RC633-647.5 - Abstract
Introdução: Os linfomas de células T são incomuns em crianças e adolescentes, e aqueles oriundos de células precursoras, como linfoma T linfoblástico, são os mais prevalentes. Os linfomas de células T periféricas, que perfazem 15% dos linfomas não-Hodgkin em adultos, são muito raros em pacientes pediátricos, representando cerca de 1% das neoplasias de células T nessa população. Assim, são um desafio diagnóstico e terapêutico na hematologia pediátrica, e o reconhecimento dessa entidade clínica é essencial para o manejo das neoplasias linfoides nessa faixa etária. Objetivo: Relatar um caso de linfoma T helper folicular nodal em idade pediátrica. Relato do caso: Menino, 11 anos, interna no Hospital de Clínicas de Porto Alegre em janeiro de 2024 por febre intermitente há 11 dias, associada a perda ponderal e sudorese noturna. Ao exame, emagrecido, com hepatoesplenomegalia. Hemograma com pancitopenia (hemoglobina 8,8 g/dL, leucócitos 1060/μL com 400 neutrófilos/μL, e plaquetas 59.000/μL) sem células jovens e LDH 289 U/L. Tomografias de tórax e abdome mostraram linfonodomegalias mediastinais e hilares confluentes (a maior sendo paratraqueal direita – 5,3 x 3,0 cm) além de retroperitoneais, principalmente em hilo esplênico. Havia esplenomegalia importante (baço de 18,9 x 13,9 x 6,2 cm, com imagens hipovasculares). Biópsia de linfonodo paratraqueal descreveu arquitetura linfonodal alterada pela proliferação de linfócitos pequenos e intermediários; análise imunohistoquímica foi positiva para CD5, CD7, CD4 e negativa para CD8, BCL6, CD10 e CD30, firmando o diagnóstico de linfoma de células T helper folicular nodal sem especificação, com índice proliferativo Ki67 de 30%. Avaliação medular negativa. Após 4 ciclos de CHOEP (ciclofosfamida-daunorrubicina-vincristina-etoposídeo-prednisona), paciente apresentava doença estável, com escore de Lugano 5 em PET-CT e infiltração de medula óssea por células do mesmo fenótipo daquelas encontradas no linfonodo ao diagnóstico. Iniciado protocolo ICE (ifosfamida-carboplatina-etoposídeo) e, em PET-CT após o segundo ciclo, paciente apresentou escore de Lugano 4 (resposta parcial). Discussão: Por sua raridade, os linfomas de células T periféricas são um diagnóstico diferencial desafiador em crianças e adolescentes – grupo com alta prevalência de doenças virais que mimetizam sintomas B, como infecção por vírus Epstein-Barr e citomegalovírus. Assim, a correlação clínica, patológica e imunohistoquímica é crucial. Quanto ao tratamento – amplamente baseado em regimes de quimioterapia citotóxica como o CHOEP, pensados para adultos – mostra-se fundamental a busca por terapias-alvo, almejando melhor sobrevida na população pediátrica. Em adultos, o uso de brentuximab vedotina (BV) em pacientes CD30-positivos, associado a ciclofosfamida, daunorrubicina e prednisona (CHP), demonstra maior sobrevida livre de progressão e sobrevida global. Conclusão: O diagnóstico preciso de linfomas de célula T, na era das terapias-alvo, tem implicação prognóstica e terapêutica. No cenário pediátrico, os linfomas de células T maduras, ainda que raros, apresentam desfechos pouco melhores do que em adultos. Ademais, recaída e refratariedade são comuns, e o melhor regime de tratamento nesses casos ainda não é definido. A preferência do transplante autólogo de células hematopoiéticas em relação ao alogênico se dá por melhor perfil de toxicidade e pela relação risco-benefício.
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- 2024
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28. USO DA GLOBULINA ANTITIMÓCITO NO TRANSPLANTE DE CÉLULAS-TRONCO HEMATOPOIÉTICAS ALOGÊNICO NÃO APARENTADO NA LEUCEMIA LINFOBLÁSTICA AGUDA: ANÁLISE DOS DESFECHOS DE UMA COORTE RETROSPECTIVA
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ET Calvache, NKD Santos, CS Weber, PO Silva, MO Ribas, AA Paz, MB Michalowski, and LE Daudt
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Diseases of the blood and blood-forming organs ,RC633-647.5 - Abstract
Introdução: A Leucemia Linfoblástica Aguda (LLA) é a neoplasia maligna resultante do crescimento desregulado de células linfoides clonais. O transplante de células-tronco hematopoiéticas alogênico (Alo-TCTH) é indicado para alguns subgrupos como doença de alto risco e recaída. No entanto, aproximadamente 30%‒50% dos pacientes apresentarão Doença do Enxerto Contra o Hospedeiro (DECHa) aguda e cerca de 15% terão DECH grave (graus III‒IV) e DECH crônica (DECHc), as quais deflagram-se em morbi-mortalidade. Os regimes usados para a profilaxia da DECH são definidos conforme a intensidade de condicionamento e o tipo de transplante. No cenário do Alo-TCTH não aparentado, o uso da Globulina Antitimócitos (ATG) de coelho é recomendado como parte da profilaxia, embora seja associado a ele um potencial aumento de complicações infecciosas e atraso na reconstituição imune. Além disso, alguns estudos têm sugerido aumento de recaída, diminuição da Sobrevida Global (SG) e sobrevida livre de progressão. Objetivo: Descrever os desfechos clínicos dos pacientes portadores de LLA submetidos à Alo-TCTH alogênico não aparentado que receberam ATG conforme o protocolo do nosso serviço. Métodos: Estudo de coorte retrospectivo com pacientes portadores de LLA que realizaram Alo-TCTH NAP durante o período de 1994‒2023 no HCPA. Análise estatística: Realizada no software SPSS versão 21,0, os dados clínicos foram descritos como mediana e percentis (p25‒p75), frequência absoluta e relativa. O nível de significância foi de p < 0,05. A SG foi realizada por Kaplan-Meier. Resultados: Foram identificados 47 pacientes entre 1994 e 2023 com critérios de inclusão para o estudo. A mediana de idade ao TCTH foi de 12 anos (8‒19); dois terços foram masculinos, 19.1% eram portadores de LLA B Ph+, e o tempo entre o diagnóstico e a realização do alo-TCTH foi de 14 meses (8‒366). A compatibilidade na maioria foi de 10×10 (38,3%), seguido por 9×10 (14,9%) e 11×12 (12,8%). A mediana da dose de ATG calculada pelo peso do paciente foi de 8 mg/kg (5‒10). Quando avaliada a SG pela estratificação da dose da ATG (< 7.5 mg/kg vs. > 7.5), estimou-se um valor, em meses, de 68,8 (27; 110) e 78.7 (49; 107), respectivamente (p = 0,26). A DECHa identificou-se em 44,7% dos casos, sendo que 27.7% apresentaram comprometimento cutâneo e visceral e 17% tiveram acometimento exclusivo à pele. Na severidade da DECHa, houve 23,4% com grau III/IV. DECHc apresentou-se em 23,4% dos pacientes. Entre os que desenvolveram DECHc moderada - severa, o principal motivo de óbito foi a DECH. Reativação e a doença por CMV ocorreram em 66% e 14,9% dos pacientes respectivamente. Os órgãos acometidos foram pulmão e TGI com 6,4% cada um deles, seguidos por retina 2,1%. Houve 5 pacientes com infecção por EBV e 3 com cistite hemorrágica por poliomavirus. Neoplasia secundária foi identificada em cinco casos: linfoma/PTLD 7,1% e 2,4% para SMD/LMA e tumores sólidos. Houve 12,8% de recaída pós Alo-TCTH, no entanto, quando avaliadas as causas de óbito, 40,4% dos pacientes faleceram por sepse, seguido por DECH e recaída com 4,3% para cada um deles. Conclusão: Na nossa coorte, não houve diferença na SG na estratificação da dose da ATG, porém mais estudos são necessários na avaliação da dose individual de cada paciente.
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- 2024
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29. Satellite-based high-resolution maps of cocoa planted area for C\^ote d'Ivoire and Ghana
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Kalischek, Nikolai, Lang, Nico, Renier, Cécile, Daudt, Rodrigo Caye, Addoah, Thomas, Thompson, William, Blaser-Hart, Wilma J., Garrett, Rachael, Schindler, Konrad, and Wegner, Jan D.
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Computer Science - Computer Vision and Pattern Recognition ,Computer Science - Artificial Intelligence - Abstract
C\^ote d'Ivoire and Ghana, the world's largest producers of cocoa, account for two thirds of the global cocoa production. In both countries, cocoa is the primary perennial crop, providing income to almost two million farmers. Yet precise maps of cocoa planted area are missing, hindering accurate quantification of expansion in protected areas, production and yields, and limiting information available for improved sustainability governance. Here, we combine cocoa plantation data with publicly available satellite imagery in a deep learning framework and create high-resolution maps of cocoa plantations for both countries, validated in situ. Our results suggest that cocoa cultivation is an underlying driver of over 37% and 13% of forest loss in protected areas in C\^ote d'Ivoire and Ghana, respectively, and that official reports substantially underestimate the planted area, up to 40% in Ghana. These maps serve as a crucial building block to advance understanding of conservation and economic development in cocoa producing regions.
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- 2022
30. Recognition of Unseen Bird Species by Learning from Field Guides
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Rodríguez, Andrés C., D'Aronco, Stefano, Daudt, Rodrigo Caye, Wegner, Jan D., and Schindler, Konrad
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Computer Science - Computer Vision and Pattern Recognition ,Computer Science - Machine Learning - Abstract
We exploit field guides to learn bird species recognition, in particular zero-shot recognition of unseen species. Illustrations contained in field guides deliberately focus on discriminative properties of each species, and can serve as side information to transfer knowledge from seen to unseen bird species. We study two approaches: (1) a contrastive encoding of illustrations, which can be fed into standard zero-shot learning schemes; and (2) a novel method that leverages the fact that illustrations are also images and as such structurally more similar to photographs than other kinds of side information. Our results show that illustrations from field guides, which are readily available for a wide range of species, are indeed a competitive source of side information for zero-shot learning. On a subset of the iNaturalist2021 dataset with 749 seen and 739 unseen species, we obtain a classification accuracy of unseen bird species of $12\%$ @top-1 and $38\%$ @top-10, which shows the potential of field guides for challenging real-world scenarios with many species. Our code is available at https://github.com/ac-rodriguez/zsl_billow, Comment: Accepted to WACV2024
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- 2022
31. Institutional insights into engraftment syndrome: A cohort study on allogeneic transplantation outcomes
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Portich, Júlia Plentz, Ribeiro, Aline Sinhorelo, Rigoni, Lisandra Della Costa, da Rocha Silla, Lúcia Mariano, Astigarraga, Claudia Caceres, Daudt, Liane Esteves, and Paz, Alessandra Aparecida
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- 2024
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32. High-resolution population maps derived from Sentinel-1 and Sentinel-2
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Metzger, Nando, Daudt, Rodrigo Caye, Tuia, Devis, and Schindler, Konrad
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- 2024
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33. FiLM-Ensemble: Probabilistic Deep Learning via Feature-wise Linear Modulation
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Turkoglu, Mehmet Ozgur, Becker, Alexander, Gündüz, Hüseyin Anil, Rezaei, Mina, Bischl, Bernd, Daudt, Rodrigo Caye, D'Aronco, Stefano, Wegner, Jan Dirk, and Schindler, Konrad
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Computer Science - Machine Learning - Abstract
The ability to estimate epistemic uncertainty is often crucial when deploying machine learning in the real world, but modern methods often produce overconfident, uncalibrated uncertainty predictions. A common approach to quantify epistemic uncertainty, usable across a wide class of prediction models, is to train a model ensemble. In a naive implementation, the ensemble approach has high computational cost and high memory demand. This challenges in particular modern deep learning, where even a single deep network is already demanding in terms of compute and memory, and has given rise to a number of attempts to emulate the model ensemble without actually instantiating separate ensemble members. We introduce FiLM-Ensemble, a deep, implicit ensemble method based on the concept of Feature-wise Linear Modulation (FiLM). That technique was originally developed for multi-task learning, with the aim of decoupling different tasks. We show that the idea can be extended to uncertainty quantification: by modulating the network activations of a single deep network with FiLM, one obtains a model ensemble with high diversity, and consequently well-calibrated estimates of epistemic uncertainty, with low computational overhead in comparison. Empirically, FiLM-Ensemble outperforms other implicit ensemble methods, and it and comes very close to the upper bound of an explicit ensemble of networks (sometimes even beating it), at a fraction of the memory cost., Comment: accepted at NeurIPS 2022
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- 2022
34. Urban Change Forecasting from Satellite Images
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Metzger, Nando, Türkoglu, Mehmet Özgür, Daudt, Rodrigo Caye, Wegner, Jan Dirk, and Schindler, Konrad
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Computer Science - Computer Vision and Pattern Recognition - Abstract
Forecasting where and when new buildings will emerge is a rather unexplored topic, but one that is very useful in many disciplines such as urban planning, agriculture, resource management, and even autonomous flying. In the present work, we present a method that accomplishes this task with a deep neural network and a custom pretraining procedure. In Stage 1, a U-Net backbone is pretrained within a Siamese network architecture that aims to solve a (building) change detection task. In Stage 2, the backbone is repurposed to forecast the emergence of new buildings based solely on one image acquired before its construction. Furthermore, we also present a model that forecasts the time range within which the change will occur. We validate our approach using the SpaceNet7 dataset, which covers an area of 960 km^2 at 24 points in time across two years. In our experiments, we found that our proposed pretraining method consistently outperforms the traditional pretraining using the ImageNet dataset. We also show that it is to some degree possible to predict in advance when building changes will occur., Comment: PFG 2023, accepted
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- 2022
35. Urban Change Forecasting from Satellite Images
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Metzger, Nando, Türkoglu, Mehmet Özgür, Daudt, Rodrigo Caye, Wegner, Jan Dirk, and Schindler, Konrad
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- 2023
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36. Characterization of Three Novel Papillomavirus Genomes in Vampire Bats (Desmodus rotundus)
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Laura Junqueira de Camargo, Raquel Silva Alves, Raíssa Nunes dos Santos, Letícia Ferreira Baumbach, Juliana do Canto Olegário, Vitória Rabaioli, Matheus de Oliveira Silva, André Alberto Witt, Fernanda Marques Godinho, Richard Steiner Salvato, Matheus Nunes Weber, Mariana Soares da Silva, Cíntia Daudt, Renata da Fontoura Budaszewski, and Cláudio Wageck Canal
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bats ,haematophagous ,novel viruses ,Papillomaviridae ,sequencing ,Veterinary medicine ,SF600-1100 ,Zoology ,QL1-991 - Abstract
Bats are mammals with high biodiversity and wide geographical range. In Brazil, three haematophagous bat species are found. Desmodus rotundus is the most documented due to its role as a primary host of rabies virus in Latin America. Bats are known to harbor various emerging viruses causing severe human diseases. Beyond zoonotic viruses, these animals also harbor a diversity of non-zoonotic viruses. Papillomaviruses are circular double-stranded deoxyribonucleic acid (dsDNA) viruses that infect the epithelial and mucosal cells of many vertebrates, occasionally causing malignant lesions. High-throughput sequencing has enabled papillomaviruses discovery in different bat species. Here, 22 D. rotundus samples were collected through the rabies eradication program in Rio Grande do Sul. The DNA extracted from pooled intestines was amplified by the rolling-circle amplification (RCA) method and sequenced using the Illumina® MiSeq platform (San Diego, CA, USA).Analysis revealed three contigs corresponding to the Papillomaviridae family, representing three novel viruses named DrPV-1, DrPV-2, and DrPV-3. Phylogenetic analysis suggests DrPV-1 may constitute a new species within the Dyophipapillomavirus genus, while DrPV-2 and DrPV-3 may represent different types within the same species from a novel genus. This is the first description of a papillomavirus in the D. rotundus species, contributing to the characterization of PVs in the Chiropteran order.
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- 2024
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37. Weakly Supervised Change Detection Using Guided Anisotropic Difusion
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Daudt, Rodrigo Caye, Saux, Bertrand Le, Boulch, Alexandre, and Gousseau, Yann
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Electrical Engineering and Systems Science - Image and Video Processing ,Computer Science - Computer Vision and Pattern Recognition ,Computer Science - Machine Learning - Abstract
Large scale datasets created from crowdsourced labels or openly available data have become crucial to provide training data for large scale learning algorithms. While these datasets are easier to acquire, the data are frequently noisy and unreliable, which is motivating research on weakly supervised learning techniques. In this paper we propose original ideas that help us to leverage such datasets in the context of change detection. First, we propose the guided anisotropic diffusion (GAD) algorithm, which improves semantic segmentation results using the input images as guides to perform edge preserving filtering. We then show its potential in two weakly-supervised learning strategies tailored for change detection. The first strategy is an iterative learning method that combines model optimisation and data cleansing using GAD to extract the useful information from a large scale change detection dataset generated from open vector data. The second one incorporates GAD within a novel spatial attention layer that increases the accuracy of weakly supervised networks trained to perform pixel-level predictions from image-level labels. Improvements with respect to state-of-the-art are demonstrated on 4 different public datasets., Comment: Machine Learning Journal 2021. arXiv admin note: substantial text overlap with arXiv:1904.08208
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- 2021
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38. Ni(II) and Cu(II) complexes derived from thiophene-2,5-bis(thiosemicarbazone) as unprecedented templates for photocatalytic hydrogen production
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Santarelli, Andrés, Brandl, Cândida A., Cechin, Camila N., Bortolotto, Tanize, Daudt, Natália de Freitas, Burrow, Robert A., Lang, Ernesto Schulz, Tirloni, Bárbara, and Ledesma, Gabriela N.
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- 2024
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39. Effectiveness of dexmedetomidine on patient-centred outcomes in surgical patients: a systematic review and Bayesian meta-analysis
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Verret, Michael, Le, John B.P., Lalu, Manoj M., Jeffers, Matthew S., McIsaac, Daniel I., Nicholls, Stuart G., Turgeon, Alexis F., Ramchandani, Rashi, Li, Hongda, Hutton, Brian, Zivkovic, Fiona, Graham, Megan, Lê, Maxime, Geist, Allison, Bérubé, Mélanie, O'Hearn, Katie, Gilron, Ian, Poulin, Patricia, Daudt, Helena, Martel, Guillaume, McVicar, Jason, Moloo, Husein, and Fergusson, Dean A.
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- 2024
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40. ALGORITMOS INDOMÁVEIS: UMA ANÁLISE SEMIOLINGUÍSTICA DA RELAÇÃO ENTRE FÃS E UMA PLATAFORMA DIGITAL
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Yara Fernanda Chimite and Gustavo Daudt Fischer
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algoritmos ,plataformas digitais ,teoria semiolinguística ,estudos de fãs ,dramas asiáticos ,Education ,Social sciences (General) ,H1-99 - Abstract
Este artigo realiza uma análise semiolinguística do relacionamento entre fãs e uma plataforma digital, com enfoque nos discursos envolvidos no processo de atualização da lista de Top Shows da plataforma MyDramaList e as subsequentes reações dos fãs do drama O Indomável, que caiu da primeira para a segunda posição. Tem como objetivo investigar a construção das identidades discursivas tanto da plataforma, com ênfase em seu algoritmo de classificação, quanto do fandom. Toma como base teórica uma articulação entre os Estudos de Plataforma (Van Dijck, 2013; Gillespie, 2015; Helmond, 2015; Van Dijck; Poell; De Waal, 2018), estudos sobre algoritmos (Gillespie, 2018; Beer, 2016; Bucher, 2017), Estudos de Fãs (Fiske, 1992; Stein, 2015; Lamerichs, 2018) e, mais especificamente, fãs nas plataformas digitais (Yin, 2020; Zhang; Negus, 2020), estudos sobre afeto em rede (Paasonen; Hillis; Petit, 2015; Dean, 2015) e a Teoria Semiolinguística (Charaudeau, 2008, 2009, 2013, 2014, 2015). Analisa, com abordagem Qualitativa, os comentários dos fãs na página do drama no MyDramaList, bem como os fragmentos discursivos da plataforma. Os resultados demonstram que a plataforma procura construir uma identidade discursiva de neutralidade, enquanto os fãs interpretam essa identidade de maneiras variáveis, construindo suas próprias identidades de fãs atreladas à plataforma e constituindo a lista de Top Shows como um signo (Ponzio, 2008).
- Published
- 2024
- Full Text
- View/download PDF
41. Valores Humanos e Crença em Informações Enganosas a Respeito da COVID-19
- Author
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Rafaella S. Daudt, Sabrina Daiana Cúnico, and Marcus Levi Lopes Barbosa
- Subjects
saúde ,informação ,COVID-19 ,valores ,Psychology ,BF1-990 - Abstract
Resumo Valores são aspectos fundamentais da psicologia humana, sendo permeados pela forma como os indivíduos se veem e aspiram ser. Este estudo objetivou avaliar associações entre valores humanos e crença em informações enganosas sobre a COVID-19 no Brasil. Participaram 238 sujeitos, que responderam a três instrumentos de autorrelato: Questionário de Atitudes Frente ao Coronavírus, Questionário de Consumo de Informações e a Escala de Valores Pessoais - PQV-21. Evidenciou-se correlações estatisticamente significativas entre os valores de Tradição e crença em informações enganosas. Assim, quando as prioridades axiológicas envolvem a manutenção do status quo, as informações consumidas tendem a ser aquelas que negam ou minimizam a gravidade da doença. Aqueles que priorizam valores coletivistas, por outro lado, tendem a maior adesão a medidas preventivas e de controle. Ressalta-se a importância do desenvolvimento de estratégias assertivas na comunicação e orientação em saúde pública alinhadas ao estudo dos valores humanos.
- Published
- 2024
- Full Text
- View/download PDF
42. Mapping Vulnerable Populations with AI
- Author
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Kellenberger, Benjamin, Vargas-Muñoz, John E., Tuia, Devis, Daudt, Rodrigo C., Schindler, Konrad, Whelan, Thao T-T, Ayo, Brenda, Ofli, Ferda, and Imran, Muhammad
- Subjects
Computer Science - Computer Vision and Pattern Recognition ,Electrical Engineering and Systems Science - Image and Video Processing - Abstract
Humanitarian actions require accurate information to efficiently delegate support operations. Such information can be maps of building footprints, building functions, and population densities. While the access to this information is comparably easy in industrialized countries thanks to reliable census data and national geo-data infrastructures, this is not the case for developing countries, where that data is often incomplete or outdated. Building maps derived from remote sensing images may partially remedy this challenge in such countries, but are not always accurate due to different landscape configurations and lack of validation data. Even when they exist, building footprint layers usually do not reveal more fine-grained building properties, such as the number of stories or the building's function (e.g., office, residential, school, etc.). In this project we aim to automate building footprint and function mapping using heterogeneous data sources. In a first step, we intend to delineate buildings from satellite data, using deep learning models for semantic image segmentation. Building functions shall be retrieved by parsing social media data like for instance tweets, as well as ground-based imagery, to automatically identify different buildings functions and retrieve further information such as the number of building stories. Building maps augmented with those additional attributes make it possible to derive more accurate population density maps, needed to support the targeted provision of humanitarian aid.
- Published
- 2021
43. Seabird assemblages are linked to the major western boundary current off eastern Australia
- Author
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Daudt, Nicholas W., Woehler, Eric J., Schofield, Matthew R., Smith, Robert O., Bugoni, Leandro, and Rayment, William J.
- Published
- 2024
- Full Text
- View/download PDF
44. Intraoperative pharmacologic opioid minimisation strategies and patient-centred outcomes after surgery: a scoping review
- Author
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Verret, Michael, Lam, Nhat H., Lalu, Manoj, Nicholls, Stuart G., Turgeon, Alexis F., McIsaac, Daniel I., Hamtiaux, Myriam, Bao Phuc Le, John, Gilron, Ian, Yang, Lucy, Kaimkhani, Mahrukh, Assi, Alexandre, El-Adem, David, Timm, Makenna, Tai, Peter, Amir, Joelle, Srichandramohan, Sriyathavan, Al-Mazidi, Abdulaziz, Fergusson, Nicholas A., Hutton, Brian, Zivkovic, Fiona, Graham, Megan, Lê, Maxime, Geist, Allison, Bérubé, Mélanie, Poulin, Patricia, Shorr, Risa, Daudt, Helena, Martel, Guillaume, McVicar, Jason, Moloo, Husein, and Fergusson, Dean A.
- Published
- 2024
- Full Text
- View/download PDF
45. Antibiotic prophylaxis in acute childhood leukemia: What is known so far?
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Mauro Cesar Dufrayer, Yasmine Massaro Carneiro Monteiro, Fabianne Altruda de Moraes Costa Carlesse, Fabrizio Motta, Liane Esteves Daudt, and Mariana Bohns Michalowski
- Subjects
Acute leukemia ,Pediatric ,Fluoroquinolone ,Prophylaxis ,Levofloxacin ,Diseases of the blood and blood-forming organs ,RC633-647.5 - Abstract
Introduction: The treatment of acute lymphoblastic leukemia (ALL) has evolved in recent decades, reaching an overall survival rate close to 90%. Currently, approximately 4% of patients with ALL die from secondary complications of chemotherapy. Among these complications, the most frequent is febrile neutropenia (FN). The treatment of acute myeloid leukemias (AMLs) is even more aggressive, being consequently related to a considerable amount of treatment-related toxicity with a high risk of severe infection and death. Method: In order to reduce the infection-related risks in these groups of patients, systemic antibacterial prophylaxis has emerged as a possible approach. Results: Antibiotic prophylaxis during neutropenia periods in those undergoing chemotherapy have .already been proven in adults with acute leukemias (ALs). Among the possible available therapeutic options for bacterial prophylaxis in children with cancer, fluoroquinolones emerged with the most amount of evidence. Within this class, levofloxacin became the best choice. Conclusion: Therefore, the use of levofloxacin seems to be indicated in very specific situations: in children who are known to be neutropenic for a long time, secondary to intensive chemotherapy; in children with AL undergoing chemotherapy to induce remission; or in children undergoing hematopoietic stem cell transplantation (HSCT). This article aims to describe recent evidence focusing on antibiotic prophylaxis in children with ALs.
- Published
- 2023
- Full Text
- View/download PDF
46. Eyeworms of wild birds and new record of Thelazia (Thelaziella) aquilina (Nematoda: Spirurida)
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Renata Fagundes-Moreira, Marcos Antonio Bezerra-Santos, Riccardo Paolo Lia, Cíntia Daudt, Juliana Tessália Wagatsuma, Elaine Christina Oliveira de Carmo, Laura Berger, Flavio Roberto Chaves da Silva, João Fabio Soares, and Domenico Otranto
- Subjects
Eyeworms ,Thelaziosis ,Thelaziella ,Wild birds ,Zoology ,QL1-991 - Abstract
The eyeworms of the subgenus Thelaziella infect orbital cavities, conjunctival sacs and lachrymal ducts of many wild birds, being able to cause conjunctivitis. In Brazil, at least 10 species of Thelaziella have been described. Here we present a brief review of cases of Thelazia (Thelaziella) aquilina and describe the infection of this parasite in Harpia harpyja, as a new host record. Two nematodes were collected from the surface of the cornea of an adult female H. harpyja in the Amazon region (Brazil) and were morphologically identified as two males of T. (T.) aquilina. This data demonstrated the need for further studies focused on elucidating the transmission, biological cycle, and phylogenetic positioning of Thelaziella as subgenus.
- Published
- 2024
- Full Text
- View/download PDF
47. Documentar na educação infantil: um olhar sobre um percurso formativo com professoras na creche
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Marcia Regina Mendes, Luciane Pandini-Simiano, and Luciano Daudt da Rocha
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documentação pedagógica ,formação docente ,educação infantil ,Education - Abstract
O presente texto tematiza o gesto de documentar na Educação Infantil. A pesquisa, desenvolvida em uma perspectiva qualitativa, foi realizada no âmbito do Mestrado em Educação em Santa Catarina. Teve como sujeitos uma diretora e quatro professoras que atuam na Educação Infantil na mesma região e que participaram de uma experiência formativa realizada a partir de um curso de extensão tecido pela análise do gesto de documentar na creche. A observação participante, registros escritos, fotográficos, audiovisuais e, sobretudo, o estar junto com as professoras foram os instrumentos de pesquisa. Como resultados, identifica-se nas documentações pedagógicas construídas pelas professoras a concepção de criança como sujeito de direitos, criadora, potente, ativa no processo de construção histórica. Essa concepção possibilitou pensar outra forma de docência na creche, que compreende as crianças e suas infâncias não sob um ângulo de análise autocêntrico, mas partir da lógica infantil, que tem no brincar sua forma privilegiada de ser, estar e conhecer o mundo. No percurso formativo com as professoras observou-se que o compartilhamento das documentações construídas se constituiu uma experiência (trans)formadora, potencializando outras formas e racionalidades para pensar um percurso formativo com professores.
- Published
- 2024
- Full Text
- View/download PDF
48. APRESENTAÇÃO
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Sandra Portella Montardo and Gustavo Daudt Fischer
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Education ,Social sciences (General) ,H1-99 - Published
- 2024
49. BiasBed - Rigorous Texture Bias Evaluation.
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Nikolai Kalischek, Rodrigo Caye Daudt, Torben Peters, Reinhard Furrer, Jan D. Wegner, and Konrad Schindler
- Published
- 2023
- Full Text
- View/download PDF
50. Guided Depth Super-Resolution by Deep Anisotropic Diffusion.
- Author
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Nando Metzger, Rodrigo Caye Daudt, and Konrad Schindler
- Published
- 2023
- Full Text
- View/download PDF
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