Using GPUs in Real-Time Applications: A Review of Techniques for Analyzing and Optimizing the Timing Parameters

[EN] Autonomous driving is attracting an increasing attention in industry, not only in the automotive sector, but also in the transport of people or goods by road or railway and in more controlled manufacturing environments. The cyber-physical systems that are being proposed for this type of applications require a large computing capacity (hardware architectures with several cores, GPUs, NPUs...) to be able to attend and react to a multiple and complex amount of sensors (cameras, radar, LiDAR, measure of distance, etc.). On the other hand, this type of system must meet both safety and real-time requirements. This last aspect poses challenges on which intensive work is being done and on which there are still many open issues. In this work, a review of the most recent literature on the use of heterogeneous architectures with GPUs in real-time applications is made. These works mainly propose some solutions to the estimation of bounds to the execution times and response times, and consider different optimization strategies emphasising memory interference mitigation.[ES] La conducción autónoma despierta un interés cada vez mayor en la industria, no solo en el sector de la automoción, sino también en el transporte de personas o mercancías por carretera o ferrocarril y en entornos de fabricación más controlados. Los sistemas ciber-físicos que se están proponiendo para este tipo de aplicaciones requieren de una gran capacidad de cómputo (arquitecturas hardware con varios núcleos, GPUs, NPUs ) para poder atender y reaccionar a una múltiple y compleja cantidad de sensores (cámaras, radar, LiDAR, medida de distancia, etc.). Por otro lado, este tipo de sistemas debe atender a requisitos de seguridad funcional y también de tiempo real. Este último aspecto plantea retos en los que se está trabajando intensamente y en los que aún quedan muchas cuestiones por resolver. En este trabajo, se hace una revisión de la literatura más reciente del uso de arquitecturas heterogéneas con GPUs en aplicaciones de tiempo real. Estos trabajos proponen soluciones para la estimación de cotas de tiempos de ejecución y respuesta temporal, proponiendo diferentes estrategias de optimización destacando la mitigación de interferencia en la memoria.Este trabajo ha sido parcialmente financiado por MCIN/AEI /10.13039/501100011033/ FEDER “Una manera de hacer Europa” a través de las subvenciones PID2021-124502OB-C42 y PID2021-124502OB-C44 (PRESECREL).Gomez, I.; Díaz De Cerio, U.; Parra, J.; Rivas, JM.; Gutiérrez, JJ. (2023). Uso de GPUs en aplicaciones de tiempo real: Una revisión de técnicas para el análisis y optimización de parámetros temporales. Revista Iberoamericana de Automática e Informática industrial. 21(1):1-16. https://doi.org/10.4995/riai.2023.2032111621

Fluvial sedimentation and its reservoir potential at foreland basin margins: a case study of the Puig-reig anticline (South-eastern Pyrenees)

Fluvial fans represent one of the dominant sedimentary systems at the active margins of non-marine foreland basins. The Puig-reig anticline at the north-eastern margin of the Ebro Foreland Basin (SE Pyrenees, Spain) exposes continuous outcrops of Late Eocene-Early Oligocene fluvial deposits, from proximal to medial fluvial fan environments. The proximal deposits, found in the north limb of the anticline, especially in the northwest zone. These deposits are characterised by conglomerates with minor interbedded sandstones, with thick and wide sheet-like geometries with unscoured or variably scoured basal surfaces. These are interpreted to be the deposits of unconfined flash floods and wide-shallow channel streams. The medial deposits, covering the rest of the anticline, consist of interbedded conglomerates, sandstones and claystones. These are interpreted to have been deposited from braided to meandering channel streams and overbank areas. Distal deposits are found towards the south, beyond the anticline, and are characterised by sandstone and clay deposits of terminal lobes and lacustrine deltas. This study assesses the impact of the primary depositional characteristics, diagenesis and deformation of the most heterolithic portion of the system, with implications for increasing our understanding of folded fluvial reservoirs. Diagenetic processes, mainly mechanical compaction and calcite cementation, resulted in overall low intergranular porosity, with limited relatively high porosity developed in sandstone lithofacies in the medial deposits. Deformation associated with thrusting and fold growth resulted in the formation of abundant fractures, with relatively high fracture intensities observed in sandstone lithofacies in the anticline crest. This study shows that post-depositional processes can both improve and diminish the reservoir potential of basin proximal fluvial deposits, through the development of fracture networks and by compaction-cementation. The comparison of the Puig-reig anticline with other similar settings worldwide indicates that foreland basin margin locations may be potential areas for effective reservoirs, even in the case of low intergranular porosity

Origin of the coloured karst fills in the neogene extensional system of ne iberia (Spain)

Karst fills from the onshore Penedès Basin and offshore València Trough display red, pink, orange and ochre colours. Their Mössbauer spectra indicate that Fe contained in goethite is the dominant species in reddish-pink fills, whereas Fe contained in dolomite and clays is more dominant in the orange and ochre ones. The lower δ C values and higher Sr/ Sr ratios of the karst fills with respect to their host carbonates can reflect the input of soil-derived CO and an external radiogenic source into the karst system. This geochemical composition, together with the non-carbonate fraction of the fills, consists of authigenic and transported illite, illite-smectite interlayers, as well as kaolinite, chlorite, pyrite, quartz, ilmenite, magnetite, apatite and feldspar, account for a mixed residual-detrital origin of fills. This polygenic origin agrees with that of the terra rossa sediments described worldwide. The different colours of karst fills are attributed to fluctuations in the water table, which control the Eh/pH conditions in the karst system. Thus, reddish colours reflect low water table levels and oxidising episodes, and orange and ochre ones reflect high water table levels and more reducing episodes. The greenish colours of fills could be related to fluctuations in the Fe /Fe ratio

Annual educational expenses of European urology residents and the role of sponsorship in urology training: a survey-based analysis.

Introduction The aim of this article was to evaluate the personal monetary costs associated with the urology residency. Material and methods The European Society of Residents in Urology (ESRU) designed a 35-item survey and distributed it via email and social media to urology residents in Europe.Monthly net salary and educational expenses (general expenses, literature, congresses and courses) and opinions regarding sponsorship and expenditure were evaluated. Comparisons between different countries and salary cut-offs were made. Results A total of 211 European urology residents completed the survey from 21 European countries. The median interquartile range (IQR) age was 30 (18-42) years and 83.0% were male. A total of 69.6% receive less than €1500 net per month and 34.6% spent ≥€3000 on education in the previous 12 months. Sponsorships came mainly from the pharmaceutical industry (57.8%), but 56.4% of trainees thought that the ideal sponsor should be the hospital/urology department. Only 14.7% of respondents stated that their salary is sufficient to cover training expenses, and 69.2% agreed that training costs have an influence on family dynamics. Conclusions Personal expenses during training are high, are not sufficiently covered by the salary and impact family dynamics for a majority of residents in Europe. The majority thought that hospitals/national urology associations should contribute to the educational costs. For homogeneous opportunities across Europe, institutions should strive to increase sponsorship.post-print1388 K

A three-dimensional printed customized bolus: adapting to the shape of the outer ear

Background: The skin-sparing effect of megavoltage-photon beams in radiotherapy (RT) reduces the target coverage of superficial tumours. Consequently, a bolus is widely used to enhance the target coverage for superficial targets. This study evaluates a three-dimensional (3D)-printed customized bolus for a very irregular surface, the outer ear. Materials and methods: We fabricated a bolus using a computed tomography (CT) scanner and evaluated its efficacy. The head of an Alderson Rando phantom was scanned with a CT scanner. Two 3D boluses of 5- and 10-mm thickness were designed to fit on the surface of the ear. They were printed by the Stratasys Objet260 Connex3 using the malleable “rubber-like” photopolymer Agilus. CT simulations of the Rando phantom with and without the 3D and commercial high density boluses were performed to evaluate the dosimetric properties of the 3D bolus. The prescription dose to the outer ear was 50 Gy at 2 Gy/fraction. Results: We observed that the target coverage was slightly better with the 3D bolus of 10 mm compared with the commercial one (D98% 98.2% vs. 97.6%).The maximum dose was reduced by 6.6% with the 3D bolus and the minimum dose increased by 5.2% when comparing with the commercial bolus. In addition, the homogeneity index was better for the 3D bolus (0.041 vs. 0.073). Conclusion: We successfully fabricated a customized 3D bolus for a very irregular surface. The target coverage and dosimetric parameters were at least comparable with a commercial bolus. Thus, the use of malleable materials can be considered for the fabrication of customized boluses in cases with complex anatomy

Hubs and clusters approach to unlock the development of carbon capture and storage – Case study in Spain

Many countries have assigned an indispensable role for carbon capture and storage (CCS) in their national climate change mitigation pathways. However, CCS deployment has stalled in most countries with only limited commercial projects realised mainly in hydrocarbon-rich countries for enhanced oil recovery. If the Paris Agreement is to be met, then this progress must be replicated widely, including hydrocarbon-limited countries. In this study, we present a novel source-to-sink assessment methodology based on a hubs and clusters approach to identify favourable regions for CCS deployment and attract renewed public and political interest in viable deployment pathways. Here, we apply this methodology to Spain, where fifteen emission hubs from both the power and the hard-to-abate industrial sectors are identified as potential CO2 sources. A priority storage structure and two reserves for each hub are selected based on screening and ranking processes using a multi-criteria decision-making method. The priority source-to-sink clusters are identified indicating four potential development regions, with the North-Western and North-Eastern Spain recognised as priority regions due to resilience provided by different types of CO2 sources and geological structures. Up to 68.7 Mt CO2 per year, comprising around 21% of Spanish emissions can be connected to clusters linked to feasible storage. CCS, especially in the hard-to-abate sector, and in combination with other low-carbon energies (e.g., blue hydrogen and bioenergy), remains a significant and unavoidable contributor to the Paris Agreement's mid-century net-zero target. This study shows that the hubs and clusters approach can facilitate CCS deployment in Spain and other hydrocarbon-limited countries

An RxLR effector from phytophthora infestans prevents re-localisation of two plant NAC transcription factors from the endoplasmic reticulum to the nucleus

The plant immune system is activated following the perception of exposed, essential and invariant microbial molecules that are recognised as non-self. A major component of plant immunity is the transcriptional induction of genes involved in a wide array of defence responses. In turn, adapted pathogens deliver effector proteins that act either inside or outside plant cells to manipulate host processes, often through their direct action on plant protein targets. To date, few effectors have been shown to directly manipulate transcriptional regulators of plant defence. Moreover, little is known generally about the modes of action of effectors from filamentous (fungal and oomycete) plant pathogens. We describe an effector, called Pi03192, from the late blight pathogen Phytophthora infestans, which interacts with a pair of host transcription factors at the endoplasmic reticulum (ER) inside plant cells. We show that these transcription factors are released from the ER to enter the nucleus, following pathogen perception, and are important in restricting disease. Pi03192 prevents the plant transcription factors from accumulating in the host nucleus, revealing a novel means of enhancing host susceptibility

Proposal of a Nutritional Quality Index (NQI) to Evaluate the Nutritional Supplementation of Sportspeople

Background: Numerous supplements are used by sportspeople. They are not always appropriate for the individual or the sports activity and may do more harm than good. Vitamin and mineral supplements are unnecessary if the energy intake is sufficient to maintain body weight and derives from a diet with an adequate variety of foods. The study objectives were to evaluate the main nutrients used as supplements in sports and to propose a nutritional quality index (NQI) that enables sportspeople to optimize their use of supplements and detect and remedy possible nutritional deficits. Material and Methods: A nutritional study was performed in 485 sportspeople recruited from Centros Andaluces de Medicina del Deporte, (CAMD). All completed socio-demographic, food frequency, and lifestyle questionnaires. The nutritional quality of their diet and need for supplementation were evaluated by scoring their dietary intake with and without supplementation, yielding two NQI scores (scales of 0-21 points) for each participant. Results: A superior mean NQI score was obtained when the supplements taken by participants were not included (16. 28 (SD of 3.52)) than when they were included (15.47 (SD: 3.08)), attributable to an excessive intake of some nutrients through supplementation. Conclusions: These results indicate that sportspeople with a varied and balanced diet do not need supplements, which appear to offer no performance benefits and may pose a health risk.The authors are grateful to the Junta de Andalucía, Spain (Research Group AGR-255“Nutrition. Diet and Risk Assessment”), a collaboration agreement with the Andalusian Centres of Sports Medicine (Junta de Andalucía) and the FPU program of the Spanish Ministry of Education and Science. Study participants were recruited through the project “Nutritional and diet assessment methodologies applied to the Andalusian sportsperson in Andalusian Sports centres”, Research project FMD2010SC0071 of the Junta de Andalucía