71 documents found, page 1 of 8

ANCA Renal Risk Score in a Portuguese Cohort: Insights and Comparison with Berd...

Introduction: Antineutrophil cytoplasmic antibody (ANCA) ‑associated vasculitis (AAV) is a rare cause of glomerulonephritis. Despite advances in immunosuppressive therapies, AAV with renal involvement often leads to poor renal outcomes and a high ‑risk of end ‑stage renal disease (ESRD). Berden classification categorizes renal histology in four classes, but performance varies across cohorts. A lack of precise f...

Viral genetics and transmission dynamics in the second wave of mpox outbreak in...

First Seminar Zimbral for LIFE & XVI International Seminar on Biodiversity Mana...

Book of Abstracts from joint Seminar of the First Seminar Zimbral for LIFE & XVI International Seminar on Biodiversity Management and Conservation, that occur in the University of Évora, between 17-21 of June 2024.

On the construction of MRD convolutional codes

The problem of building optimal block codes, such as MDS codes,over small fields has been an active area of research that led to sev-eral interesting conjectures. In the context of convolutional codes,optimal constructions, such as MDS or MDP, are very rare and allrequire very large finite fields. In this work, we focus on the problemof constructing optimal convolutional codes with respect to the rankdistance, ...

Criteria for the construction of MDS convolutional codes with good column dista...

Maximum-distance separable (MDS) convolutional codes are characterized by the property that their free distance reaches the generalized Singleton bound. In this paper, new criteria to construct MDS convolutional codes are presented. These codes also possess optimal first (reverse) column distances. The new criteria allow to relate the construction of MDS convolutional codes to those of reverse superregular Toep...

On the existence of non-catastrophic p-encoders of (2,1) convolutional codes ov...

In this work, we analyze the problem of catastrophicity of encoders of convolutional codes over the Laurent series with coefficients in Zpr, Zpr ((d)). Kuijper and Pinto proved in [8] that, contrary to what happens for codes over F((d)), where F is a field, when dealing with Zpr(d)) there are convolutional codes that do not admit non-catastrophic encoders. Nevertheless it was conjectured that any catastrophic c...

Optimal Construction for Decoding 2D Convolutional Codes over an Erasure Channel

In general, the problem of building optimal convolutional codes under a certain criteria is hard, specially when size field restrictions are applied. In this paper we confront the challenge of constructing an optimal 2D convolutional code when communicating over an erasure channel. We propose a general construction method for these codes. Specifically, we give an optimal construction when the decoding method pr...

Harmful Algal Blooms on the Portuguese coast: Cross-checking events with remote...

Phytoplankton plays a vital role in marine ecosystems, serving as a primary food source for a diverse array of organisms, including commercially important bivalves, crustaceans, and fish. However, in some situations, the proliferation of algae can cause serious economic losses for aquaculture, fishing, and tourism and have major environmental and human health impacts. Increases in the occurrence of toxic phytop...

Viral genetic clustering and transmission dynamics of the 2022 mpox outbreak in...

Pathogen genome sequencing during epidemics enhances our ability to identify and understand suspected clusters and investigate their relationships. Here, we combine genomic and epidemiological data of the 2022 mpox outbreak to better understand early viral spread, diversification and transmission dynamics. By sequencing 52% of the confirmed cases in Portugal, we identified the mpox virus sublineages with the hi...

Viral genetic clustering and transmission dynamics of the 2022 mpox outbreak in...

Pathogen genome sequencing during epidemics enhances our ability to identify and understand suspected clusters and investigate their relationships. Here, we combine genomic and epidemiological data of the 2022 mpox outbreak to better understand early viral spread, diversification and transmission dynamics. By sequencing 52% of the confirmed cases in Portugal, we identified the mpox virus sublineages with the hi...