Scalability Analysis of Signatures in Transactional Memory Systems

Signatures have been proposed in transactional memory systems to represent read and write sets and to decouple transaction conflict detection from private caches or to accelerate it. Generally, signatures are implemented as Bloom filters that allow unbounded read/write sets to be summarized in bounded space at the cost of false conflict detection. It is known that this behavior has great impact in parallel performance. In this work, a scalability study of state-of-the-art signature designs is presented, for different orthogonal transactional characteristics, including contention, length, concurrency and spatial locality. This study was accomplished using the Stanford EigenBench benchmark. This benchmark was modified to support spatial locality analysis using a Zipf address distribution. Experimental evaluation on a hardware transactional memory simulator shows the impact of those parameters in the behavior of state-of-the-art signatures.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Revisión sistemática y bioestratigrafía del género Alueva Sdzuy, 1961 (Ellipsocephalidae, Trilobita, Cámbrico).

Se revisa la sistemática del género Alueva Sdzuy, 1961 y de las tres especies incluidas en él: Alueva undulata Sdzuy, 1961, Alanisia hastata Sdzuy, 1958, y Strenuaeva sampelayoi moratrix Sdzuy, 1958, todas ellas definidas en la localidad zaragozana de Murero. Alueva venulosa Dean, 2005 se considera un sinónimo subjetivo más reciente de Protolenus dimarginatus Geyer, 1990. También se revisan los hallazgos de Alueva hastata en la Sierra de Córdoba, Cordillera Cantábrica y, posiblemente, los de las Montañas del Taurus (Turquía). Con los datos actuales, este género parece ser endémico de la Subprovincia Mediterránea. Alueva presenta una distribución muy breve, desde un punto de vista bioestratigráfico, en niveles entorno al límite Cámbrico inferior medio, en el sentido clásico, concretamente desde el techo del Bilbiliense superior y la mayor parte del Leoniense inferior en la escala cronoestratigráfica establecida para el Cámbrico español. Estos niveles son correlacionables con los que en la actualidad se están estudiando para situar el límite entre las Series 2 y 3 del Cámbrico por la ISCS

The trilobite Serrodiscus Richter & Richter from Iberia, with systematic review of the genus and its international correlation through the Cambrian Series 2

Serrodiscus is considered one of the first trilobite genera showing global distribution during the Cambrian and a key component for the international correlation of this period. However, this genus encompasses many poorly documented species, ambiguous diagnoses or characters that depend on taphonomy and deformation based on one single specimen. Thus, in the present work, we carry out a systematic overview of the genus, evaluating the taphonomic and deformational variability of a large number of specimens from the same locality and horizon. In addition, and due to the difficulty of making synonymy decisions, closely related species are grouped into three different groups taking into consideration morphologic, stratigraphic and palaeobiogeographic data: bellimarginatus group, scattered along Avalonian and western Gondwanan margins; speciosus group, extending over the Laurentian domain; and daedalus group, being restricted to eastern Gondwana (Australia), North China and, partially, Siberia. Besides, the regional correlation through the early Cambrian of Iberia is arranged, describing specimens from both Ossa-Morena and Central Iberian zones, with a time interval restricted to the upper Marianian Stage. Regarding the biostratigraphy and palaeobiogeography of the genus, Serrodiscus has been reported from Laurentia, Taconic Allochthon, Greenland, Baltica, western and eastern Avalonia, western Gondwana margin, Siberia, North China and eastern Gondwana, with a temporal distribution along with the Cambrian Series 2

Systematic and biostratigraphy of the genera Parasolenopleura, Badulesia, and Pardailhania in the Iberian Chains: a useful zonation for the Miaolingian Series (former middle Cambrian) in the Mediterranean region

The trilobite species of three genera included in the Family Solenopleuridae: Parasolenopleura, Badulesia and Pardailhania are revised. These genera have a great biostratigraphic interest due to their broad distribution in the Miaolingian Series (former middle Cambrian) of the Mediterranean Subprovince and because they constitute an evolutionary lineage, that facilitates an accurate regional correlation. Two of these genera (Pardailhania and Badulesia) have been used to define middle Cambrian zones in Spain (lower and middle Caesaraugustan, equivalent to the uppermost Wuliuan and the lower Drumian stages). Although, all authors have been using the same species to establish the Mediterranean biozonation of this interval time, the zone concept has been modified since Sdzuy's original idea. A thorough study of three localities from the Iberian Chains (Murero, Jarque and Villafeliche) have allowed us to revise the lower and middle Caesaraugustan zonation in the Iberian Chains and for extension, in the Mediterranean region by comparison with the other localities where those genera are recorded. We propose now a review zonation based on trilobite phylozones, including new stratigraphic and systematic data from the Iberian Chains in order to clarify the intercontinental correlation of this time interval

La implementación del Sistema Integrado de Transporte Público (SITP) de Bogotá y sus retos en el futuro

This article attempts to capture the main realities of implementation and commissioning of the Integrated Public Transport System (SITP) to Bogotá city and its challenges in the future. A system that will change the way to mobilize to more than 7,700,000 inhabitants that today has the city and according to the mobility survey (2011), on a business day are made travel around 17.612 million, of which 30% use public transportation of passengers. The SITP is the biggest gamble that county law enforcement authorities have made in recent years, with the firm conviction of the advantages and benefits that system, will bring about the reduction of environmental pollution, accidents, travel times, improving accessibility and coverage, organization of routes and stops, decent employment opportunities, among other.El artículo intenta acopiar las principales realidades de la im- plementación y puesta en marcha del Sistema Integrado de Transporte Público (SITP), para Bogotá y sus retos en el fu- turo. Un sistema que cambiará la manera de movilizarse de los más de 7 700 000 habitantes que hoy tiene la ciudad y que según la encuesta de movilidad (2011), de los 17 612 000 via- jes que se realizan en un día hábil, el 30 % utilizan el servicio público de transporte de pasajeros.El SITP es la mayor apuesta que las autoridades del orden distrital han realizado en los últimos años, con la firme con- vicción de las bondades y beneficios que el sistema traerá en cuanto a la disminución de la contaminación ambiental, la ac- cidentalidad, los tiempos de viaje, el mejoramiento de la ac- cesibilidad y cobertura, la organización de rutas y paraderos, oportunidades de empleo digno, entre otras

La implementación del Sistema Integrado de Transporte Público (SITP) de Bogotá y sus retos en el futuro

This article attempts to capture the main realities of implementation and commissioning of the Integrated Public Transport System (SITP) to Bogotá city and its challenges in the future. A system that will change the way to mobilize to more than 7,700,000 inhabitants that today has the city and according to the mobility survey (2011), on a business day are made travel around 17.612 million, of which 30% use public transportation of passengers. The SITP is the biggest gamble that county law enforcement authorities have made in recent years, with the firm conviction of the advantages and benefits that system, will bring about the reduction of environmental pollution, accidents, travel times, improving accessibility and coverage, organization of routes and stops, decent employment opportunities, among other.El artículo intenta acopiar las principales realidades de la im- plementación y puesta en marcha del Sistema Integrado de Transporte Público (SITP), para Bogotá y sus retos en el fu- turo. Un sistema que cambiará la manera de movilizarse de los más de 7 700 000 habitantes que hoy tiene la ciudad y que según la encuesta de movilidad (2011), de los 17 612 000 via- jes que se realizan en un día hábil, el 30 % utilizan el servicio público de transporte de pasajeros.El SITP es la mayor apuesta que las autoridades del orden distrital han realizado en los últimos años, con la firme con- vicción de las bondades y beneficios que el sistema traerá en cuanto a la disminución de la contaminación ambiental, la ac- cidentalidad, los tiempos de viaje, el mejoramiento de la ac- cesibilidad y cobertura, la organización de rutas y paraderos, oportunidades de empleo digno, entre otras

Biostratigraphy of the Ribota and Huérmeda formations (Cambrian Series 2) in the Comarca del Aranda (Zaragoza province), Iberian Chains (NE Spain).

This article presents a detailed biostratigraphic analysis of the Cambrian Series 2 Ribota and Huérmeda formations of four sections of the Iberian Chains (NE Spain), and a systematic study of their trilobite faunas. We identified four major assemblages: two in the middle part of the Ribota Formation, one at the base of the Huérmeda Formation and one at the top of the Huérmeda Formation. The studied species permit the assignment of these formations to the middle and upper Marianian and probably lower Bilbilian stages in the regional stratigraphic chart for the Iberian Peninsula, which correlates with an interval around the Cambrian Stage 3-4 boundary. The assemblages exhibit a great correlation potential with the presence of Termierella and the first figured material of Andalusiana from the Iberian Chains, two characteristic taxa of the Marianian of the Ossa-Morena Zone, having been also recorded from the Central Iberian Zone and Morocco. In addition, specimens tentatively assigned to Hebediscus are recorded for the first time from the region, a taxon with a wide geographic distribution which allows a good international correlation in the Cambrian Series 2

Experimental design and analysis of a gyroelastic beam

Division of Higher Technical Education of MexicoPublished versio

Time series analysis acceleration with advanced vectorization extensions

Time series analysis is an important research topic and a key step in monitoring and predicting events in many fields. Recently, the Matrix Profile method, and particularly two of its Euclidean-distance-based implementations—SCRIMP and SCAMP—have become the state-of-the-art approaches in this field. Those algorithms bring the possibility of obtaining exact motifs and discords from a time series, which can be used to infer events, predict outcomes, detect anomalies and more. While matrix profile is embarrassingly parallelizable, we find that auto-vectorization techniques fail to fully exploit the SIMD capabilities of modern CPU architectures. In this paper, we develop custom-vectorized SCRIMP and SCAMP implementations based on AVX2 and AVX-512 extensions, which we combine with multithreading techniques aimed at exploiting the potential of the underneath architectures. Our experimental evaluation, conducted using real data, shows a performance improvement of more than 4× with respect to the auto-vectorization.This work has been supported by the Government of Spain under project PID2019-105396RB-I00, and Junta de Andalucía under projects P18-FR-3433, and UMA18-FEDERJA-197.Peer ReviewedPostprint (published version

Presence of Naraoia Walcott, 1912 (Nektaspida, Arthropoda) in the middle Cambrian of Europe (Murero, NE Spain).

The genus Naraoia Walcott, 1912, a Burgess Shale-type fossil known from the lower and middle Cambrian of British Columbia (Canada), Idaho and Utah (USA), as well as from Yunnan and Guizhou provinces (China), is now reported from the middle Cambrian of Murero (Zaragoza, Spain), which is the first record in the Acadobaltic province. The only fragmented specimen found is determined as Naraoia sp., its age being Pardailhania multispinosa Zone (Drumian Stage). This new datum reinforces the hypothesis of the existence of a cosmopolitan faunal substrate in early Cambrian times, which is to some extent refl ected in the mid Cambrian by faunal groups of low evolutionary potential as the family Naraoiidae and other soft-bodied fossil taxa