Deep Reinforcement Learning for URLLC data management on top of scheduled eMBB traffic

With the advent of 5G and the research into beyond 5G (B5G) networks, a novel and very relevant research issue is how to manage the coexistence of different types of traffic, each with very stringent but completely different requirements. In this paper we propose a deep reinforcement learning (DRL) algorithm to slice the available physical layer resources between ultra-reliable low-latency communications (URLLC) and enhanced Mobile BroadBand (eMBB) traffic. Specifically, in our setting the time-frequency resource grid is fully occupied by eMBB traffic and we train the DRL agent to employ proximal policy optimization (PPO), a state-of-the-art DRL algorithm, to dynamically allocate the incoming URLLC traffic by puncturing eMBB codewords. Assuming that each eMBB codeword can tolerate a certain limited amount of puncturing beyond which is in outage, we show that the policy devised by the DRL agent never violates the latency requirement of URLLC traffic and, at the same time, manages to keep the number of eMBB codewords in outage at minimum levels, when compared to other state-of-the-art schemes.Comment: This work has been submitted to the IEEE for possible publication. Copyright may be transferred without notice, after which this version may no longer be accessibl

SAILenv: Learning in Virtual Visual Environments Made Simple

Recently, researchers in Machine Learning algorithms, Computer Vision scientists, engineers and others, showed a growing interest in 3D simulators as a mean to artificially create experimental settings that are very close to those in the real world. However, most of the existing platforms to interface algorithms with 3D environments are often designed to setup navigation-related experiments, to study physical interactions, or to handle ad-hoc cases that are not thought to be customized, sometimes lacking a strong photorealistic appearance and an easy-to-use software interface. In this paper, we present a novel platform, SAILenv, that is specifically designed to be simple and customizable, and that allows researchers to experiment visual recognition in virtual 3D scenes. A few lines of code are needed to interface every algorithm with the virtual world, and non-3D-graphics experts can easily customize the 3D environment itself, exploiting a collection of photorealistic objects. Our framework yields pixel-level semantic and instance labeling, depth, and, to the best of our knowledge, it is the only one that provides motion-related information directly inherited from the 3D engine. The client-server communication operates at a low level, avoiding the overhead of HTTP-based data exchanges. We perform experiments using a state-of-the-art object detector trained on real-world images, showing that it is able to recognize the photorealistic 3D objects of our environment. The computational burden of the optical flow compares favourably with the estimation performed using modern GPU-based convolutional networks or more classic implementations. We believe that the scientific community will benefit from the easiness and high-quality of our framework to evaluate newly proposed algorithms in their own customized realistic conditions.Comment: 8 pages, 7 figures, submitted to ICPR 202

Álbuns de gravura editados por Julio Pacello na coleção do Museu Universitário de Arte da UFU

Julio Pacello was an important publisher of artist´s printed albums in the 1960s and 1970s, of which the Muna - University Art Museum of the Federal University of Uberlândia - has some copies. This article discusses its presence in the museum’s collection, including inventoryinformation, data acquisition and how to determine their significant role when investigated and displayed together. Finally, it focuses the contribution of the publisher, his history and the legacy of such works, analyzing some examples and thus revealing their value and the territory they occupy in the institution.Julio Pacello foi um importante editor de álbuns de gravura nas décadas de 1960 e 1970, dos quais o MUnA - Museu Universitário de Arte da Universidade Federal de Uberlândia - possui alguns exemplares. Este artigo discute sua presença no acervo do museu, tendo em vista as informações do inventário, dados de aquisição e de como determinam um recorte significativo ao ser pensados e expostos conjuntamente. Por fim, cabe discutir a contribuição do editor, sua trajetória e o legado de tais obras, analisando os exemplares citados e portanto, revelando seu valor e o território que ocupam dentro da instituição

Ambiental e Guerrilha: estratégias de arte política no Brasil na década de 1960

A emergência de uma arte política na década de 1960 pode ser vista no contexto da transição entre a ideia modernista de uma arte pura, isolada da realidade, defendida por Clement Greenberg, e a proposta pós-moderna, que devolve a arte a seu contexto, seja ele físico, social, cultural ou linguístico. No caso brasileiro, entre os vários modos de atuação, duas estratégias específicas merecem ser estudadas com mais atenção: a arte ambiental e a arte guerrilha. O artigo propõe identificar as origens de tais propostas, suas semelhanças, diferenças e sobreposições, e examinar teóricos, artistas e obras engajados em cada vertente. Partindo das definições teóricas explicitadas nos discursos artísticos da época e em análises de casos, conclui-se que, de fato, a linha defendida por Mário Pedrosa e Hélio Oiticica e a linha defendida por Décio Pignatari e Frederico Morais não são antagônicas, mas convergentes. Porém, sua diferente recepção aponta para modelos distintos, que continuam a ser adotados pelas gerações mais recentes

SARS-COV-2 Pandemic: How to Maintain a COVID-free Hospital

The emergence of severe acute respiratory syndrome type 2 coronavirus (SARS-CoV-2) and its complications have demonstrated the devastating impact of a new infectious pathogen since the first months of 2020, especially on Health Systems. The work to maintain a COVID-free hospital in terms of reorganization of operational processes and surveillance against SARS-CoV-2 has allowed us to maintain the structure suitable for activities for non-positive patients. The commitment related to this reorganization (not only in terms of costs) is largely satisfied by the responses to the health needs of non-COVID patients. The results obtained during the First Pandemic phase at the Giovanni XXIII Hospital in Monastier di Treviso have allowed the maintenance of the status of a COVID-free hospital. These results are supported by multiple studies in other parts of the world

Rapid, progressive neuropathic arthropathy of the hip in a patient co-infected with human immunodeficiency virus, hepatitis C virus and tertiary syphilis: case report

BACKGROUND: Syphilis is a chronic infection that is classified into three stages. In its tertiary stage, syphilis spreads to the brain, heart and other organs; the lesions may involve the skin, mucous membranes and bones. Neuropathic arthropathy associated with tertiary syphilis has rarely been described in Europe and its association with HIV-HCV co-infection has not been reported so far.This article reports the case of a man with tertiary syphilis presenting with rapidly evolving neuropathic arthropathy of the hip and extensive bone destruction. CASE PRESENTATION: On initial presentation, the patient complained of progressively worsening left-sided coxalgia without localized or generalized inflammation. The patient reported to have no history of previous infections, trauma or cancer. Plain x-ray films of the left coxofemoral joint showed marked degeneration with necrosis of the proximal epiphysis of femur and morphological alterations of the acetabulum without protrusion. Primary coxarthrosis was diagnosed and hip arthroplasty was offered, but the patient declined treatment. Three months later, the patient presented a marked deterioration of his general condition. He disclosed that he was seropositive for HCV and HIV, as confirmed by serology. Syphilis serology testing was also positive. A Girdlestone's procedure was performed and samples were collected for routine cultures for bacteria and acid fast bacilli, all resulting negative.Although histological findings were inconclusive, confirmed positive serology for syphilis associated with progressive arthropathy was strongly suggestive of tertiary syphilis, probably exacerbated by HIV-HCV co-infection. The patient partially recovered the ability to walk. CONCLUSIONS: Due to the resurgence of syphilis, this disease should be considered as a possible cause of neuropathic arthropathy when other infectious causes have been ruled out, particularly in patients with HIV and/or HCV co-infection

Relação entre qualidade de vida e prevalencia de ideação suicida em pacientes atendidos no programa de transtorno de humor : HCPA

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A complex of α6 integrin and E-cadherin drives the liver metastasis of colorectal cancer cells by a physical and functional interaction with hepatic angiopoietin-like 6

Homing of colorectal cancer (CRC) cells to the liver is a non-random process driven by a crosstalk between tumour cells and components of the host tissue. Here we report the isolation of a liver metastasis-specific peptide ligand (CGIYRLRSC) that binds a complex of E-cadherin and α(6) integrin on the surface of CRC cells. We identify angiopoietin-like 6 protein as a peptide-mimicked natural ligand enriched in hepatic blood vessels of CRC patients. We demonstrate that an interaction between hepatic angiopoietin-like 6 and tumoural α(6) integrin/E-cadherin drives liver homing and colonization by CRC cells, and that CGIYRLRSC inhibits liver metastasis through interference with this ligand/receptor system. Our results indicate a mechanism for metastasis whereby a soluble factor accumulated in normal vessels functions as a specific ligand for circulating cancer cells. Consistently, we show that high amounts of coexpressed α(6) integrin and E-cadherin in primary tumours represent a poor prognostic factor for patients with advanced CRC