Toward a Core Design to Distribute an Execution on a Many-Core Processor

International audienceThis paper presents a parallel execution model and a many-core processor design to run C programs in parallel. The model automatically builds parallel sections of machine instructions from the run trace. It parallelizes instructions fetches, renamings, executions and retirements. Predictor based fetch is replaced by a fetch-decode-and-partly-execute stage able to compute in-order most of the control instructions. Tomasulo's register renaming is extended to memory with a technique to match consumer/producer pairs. The Reorder Buffer is adapted to allow parallel retirement. The model is presented on a sum reduction example which is also used to give a short analytical evaluation of the model performance potential

SenZi: A Sentiment Analysis Lexicon for the Latinised Arabic (Arabizi)

Arabizi is an informal written form of dialectal Arabic transcribed in Latin alphanumeric characters. It has a proven popularity on chat platforms and social media, yet it suffers from a severe lack of natural language processing (NLP) resources. As such, texts written in Arabizi are often disregarded in sentiment analysis tasks for Arabic. In this paper we describe the creation of a sentiment lexicon for Arabizi that was enriched with word embeddings. The result is a new Arabizi lexicon consisting of 11.3K positive and 13.3K negative words. We evaluated this lexicon by classifying the sentiment of Arabizi tweets achieving an F1-score of 0.72. We provide a detailed error analysis to present the challenges that impact the sentiment analysis of Arabizi

Marburg virus outbreak in Ghana:An impending crisis

Since the initial identification of the Marburg virus in 1967, it has sporadically emerged in several countries throughout Africa, including Zimbabwe, Kenya, South Africa, the Democratic Republic of the Congo (DRC), Uganda, and Zimbabwe. Due to the concurrent occurrence of other epidemics like the coronavirus disease 2019 (COVID-19), this outbreak could endanger the healthcare systems in these many African nations. Recently, two cases of the Marburg virus were detected in Ghana for the first time. However, there has been a noticeable lack of information concerning this recent outbreak of July 2022 in Ghana. Therefore, this article seeks to provide an overview of this outbreak in Ghana to better understand the most recent status and current efforts being made to mitigate the dissemination of the Marburg virus. We also suggest recommendations that may contribute to limiting the burden of this virus

Ballistic spin transport through a metallic system of two junctions with strong spin–orbit coupling

Inversion asymmetry at an interface separating two different metals can produce a strong interfacial Rashba spin–orbit coupling (ISOC) that induces various charge and spin transport phenomena. For the sake of analyzing such emergent phenomena in a ballistic approximation, we consider a simple model of a metallic system of two interfaces with strong spin–orbit coupling. We show that the ISOC would be responsible for inducing a z-dependent and z-independent secondary lateral charge currents from the primary spin current injected in the system (spin-charge current conversion), where the z-direction corresponds to the direction of flow of the primary spin current. We explain the fundamental background behind this induction in terms of quantum interference effects. Furthermore, we show that the presence of a tunneling barrier between the two interfaces increases spin current attenuation, but reduces it once the width of the tunneling barrier becomes sufficiently large