Automation of Determination of Optimal Intra-Compute Node Parallelism

Maximizing the productivity of modern multicore and manycore chips requires optimizing parallelism at the compute node level. This is, however, a complex multi-step process. It is an iterative method requiring determining optimal degrees of parallel scalability and optimizing memory access behavior. Further, there are multiple cases to be considered, programs which use only MPI or OpenMP and hybrid (MPI +OpenMP) programs. This paper presents a set of three coordinated workflows for determining the optimal parallelism at the program level for MPI programs and at the loop level for hybrid (MPI+OpenMP) cases. The paper also details mostly automated implementations of these workflows using the PerfExpert infrastructure. Finally the paper presents case studies demonstrating both the applicability and the effectiveness of optimizing parallelism at the compute node level. The results shown in the paper will provide valuable information to further advance in the full automation of the workflows. The software implementing the parallelism scalability optimization is open source and available for download.Texas Advanced Computing Center (TACC)Computer Science

Benchmarking the Intel®Xeon®Platinum 8160 Processor

This report presents a set of results for different microbenchmarks and applications on the Intel Xeon Platinum8160 Processor, formerly known as Skylake. For simplicity, we will use both Skylake and SKX to refer to this processor. We use the Skylake nodes that will be available in Stampede2. This systemwill provide Intel Knights Landing and Skylake chips interconnected by a 100 Gb/sec Intel Omni-Path (OPA) network with a fat tree topology. The peak performance of the system will be 18 PF.Texas Advanced Computing Center (TACC

Stellarator Optimization Using a Distributed Swarm Intelligence-Based Algorithm

The design of enhanced fusion devices constitutes a key element for the development of fusion as a commercial source of energy. Stellarator optimization presents high computational requirements because of the complexity of the numerical methods needed as well as the size of the solution space regarding all the possible configurations satisfying the characteristics of a feasible reactor. The size of the solution space does not allow to explore every single feasible configuration. Hence, a metaheuristic approach is used to achieve optimized configurations without evaluating the whole solution space. In this paper we present a distributed algorithm that mimics the foraging behaviour of bees. This behaviour has manifested its efficiency in dealing with complex problems

Virtual restoration and visualization changes through light: A review

This article belongs to the Special Issue Optical Technologies Applied to Cultural Heritage.The virtual modification of the appearance of an object using lighting technologies has become very important in recent years, since the projection of light on an object allows us to alter its appearance in a virtual and reversible way. Considering the limitation of non-contact when analysing a work of art, these optical techniques have been used in fields of restoration of cultural heritage, allowing us to visualize the work as it was conceived by its author, after a process of acquisition and treatment of the image. Furthermore, the technique of altering the appearance of objects through the projection of light has been used in projects with artistic or even educational purposes. This review has treated the main studies of light projection as a technique to alter the appearance of objects, emphasizing the calibration methods used in each study, taking into account the importance of a correct calibration between devices to carry out this technology. In addition, since the described technique consists of projecting light, and one of the applications is related to cultural heritage, those studies that carry out the design and optimization of lighting systems will be described for a correct appreciation of the works of art, without altering its state of conservationThis work has been funded by project number RTI2018-097633-A-I00 of the Ministry of Science and Innovation of Spain, entitled 'Photonic restoration applied to cultural heritage: Application to Dali's painting: Two Figures.

Electronic versus steric control in palladium complexes of carboranyl phosphine-iminophosphorane ligands

[Abstract] A new family of carboranyl phosphine-iminophosphorane ligands was prepared and characterized. The new ligands present a carboranyl group directly attached to the iminophosphorane nitrogen atom through a cage carbon atom (C-carboranyl derivatives L1–L3) or through the B3 boron atom (B-carboranyl derivatives L4 and L5), and the phosphine group on a side chain derived from the diphosphine dppm, i.e. with a two-atom spacer between the P and N donor atoms. The non-carboranyl analogue L6, with a biphenyl group on the nitrogen atom, was also synthesized for comparison. These potential (P, N) ligands were used to obtain palladium complexes (Pd1–Pd6) and, thus, study how the different inductive effect of the carboranyl substituents can modify the coordinating ability of the nitrogen atom. The structural analysis of the complexes revealed two different coordination modes for the ligands: the (P, N) chelate coordination and the unexpected P-terminal coordination, which is not observed for non-carboranyl phosphine-iminophosphoranes. These unexpected structural differences led us to perform DFT calculations on the ligands and metal complexes. The calculations show that the final coordination modes depend on the balance between the electronic and steric properties of the particular carboranyl group.This work was supported by Xunta de Galicia (Spain) (grant no. 10PXIB209285PR)Xunta de Galicia; 10PXIB209285P

LGTBI culture in Spanish public libraries. Dialogue on new equality laws

The current relevance of LGTBI collections in public libraries is studied; these collections are included and prescribed in the recent laws for equality in Spanish regions such as Galicia, Catalonia, Extremadura, Madrid, Murcia, and Balearic Islands. After reflecting on the visibility of LGTBI authors and editorials, it is concluded that these collections are still scarce and that public libraries must learn about and incorporate information and documents that expand the social knowledge of sexual diversity

Integración e incorporación de las normas internacionales de soft law sobre derechos humanos a los sistemas penal y disciplinario en Colombia

The soft law regulations have not been considered mandatory, because they do not appear on international treaties. However, an interpretation that acknowledges the human dignity and that pretends to amplify the scope of the human rights, allows that through the conventionality control, those regulations integrate to the Colombian law structure, since they compose the constitutionality block. This novelty has been introduced by the Penitentiary Code, from which, the soft law regulations can be incorporated to the Penal Code and the Penal Procedural Code; a similar exercise could be carried out with the disciplinary law, because the penal system is one; as the disciplinary system.Las normas de derecho blando no han sido consideradas como obligatorias, por no aparecer en tratados internacionales. Sin embargo, una interpretación que reconozca la dignidad humana y pretenda la ampliación del alcance de los derechos humanos permite que, a través del control de convencionalidad, dichas normas se integren al ordenamiento jurídico colombiano, por componer el Bloque de Constitucionalidad. Esta novedad ha sido introducida por el Código Penitenciario y Carcelario, desde el cual las normas de derecho blando pueden incorporarse al Código Penal y de Procedimiento Penal; similar ejercicio cabría en el derecho disciplinario, debido a que el sistema penal es uno solo; al igual que el sistema disciplinario

¿Por qué beben los jóvenes universitarios españoles? Análisis de la estructura del Drinking Motives Questionnaire Revised (DMQ-R)

El objetivo de este estudio es analizar las motivaciones para consumir alcohol de los estudiantes universitarios a través de una adaptación del Drinking Motives Questionnaire Revised (DMQ-R, Grant, Stewart, O'Connor, Blackwell y Conrod, 2007). En el trabajo se explora la estructura factorial del instrumento y se relacionan los factores obtenidos con distintos índices de consumo de alcohol. La muestra utilizada estuvo compuesta por 250 estudiantes de la Universidad de Santiago de Compostela, menores de 30 años y que habían consumido alcohol alguna vez en el último año. Los resultados obtenidos permiten diferenciar tres factores motivacionales centrados en el logro de refuerzo positivo; el afrontamiento de estados emocionales negativos y con motivos relacionados con la conformidad grupal. La obtención de refuerzo positivo es la motivación principal en los jóvenes universitarios, siendo también la que se relaciona con un mayor número de índices de consumo (frecuencia de consumo, cantidad de bebidas consumidas, problemas con el alcohol). El factor de afrontamiento es menos frecuente y se relaciona con menos índices, pero su capacidad predictiva se centra en los patrones de consumo más problemáticos (cantidad de bebidas, problemas con el alcohol, conducir después de haber bebido). El factor de conformidad es el más infrecuente en los jóvenes universitarios y no predice signifi cativamente ningún tipo de consumo. En la discusión del trabajo se plantea la utilidad de evaluar las motivaciones subyacentes al consumo de alcohol como estrategia para identifi car a jóvenes que presentan mayores riesgos asociados al consumo de alcohol, así como las implicaciones de los resultados para el desarrollo de intervenciones específi cas dirigidas a prevenir los riesgos asociados al abuso de alcohol en jóvenes.The aim of this study is to analyze the motives for drinking alcohol in university students through an adaptation of the Drinking Motives Questionnaire Revised (DMQ-R, Grant, Stewart, O'Connor, Blackwell and Conrod, 2007). This work explores the factor structure of this instrument, as well as the associations between the factors identifi ed and several indexes of alcohol use. The sample was made up of 250 students at the University of Santiago de Compostela, aged under 30, who had used alcohol at least once in the last year. The results allow differentiation of three motivational factors focused respectively on obtaining positive reinforcement, coping with negative emotional states and achieving group conformity. 'Obtaining positive reinforcement' is the main motive for the students, and it is also the motive which is related to a greater number of drinking indexes (frequency of use, number of drinks, problems with alcohol). The 'coping' factor is endorsed less frequently and is related with fewer indexes, but its predictive power is centered on the more problematic drinking patterns (number of drinks, problems with alcohol, driving under infl uence of alcohol). The 'conformity' factor is the most infrequent among the university students, and does not signifi cantly predict any kind of alcohol use. This work discusses the usefulness of assessing the motives underlying alcohol use as a strategy for identifying the young people with highest alcohol-related risks; the implications of results for specifi c prevention of alcohol-related risks are also discussed

Ultrasonographic assessment of enthesitis in HLA-B27 positive patients with rheumatoid arthritis, a matched case-only study

Introduction HLA-B27 has a modifier effect on the phenotype of multiple diseases, both associated and non-associated with it. Among these effects, an increased frequency of clinical enthesitis in patients with Rheumatoid Arthritis (RA) has been reported but never explored again. We aimed to replicate this study with a sensitive and quantitative assessment of enthesitis by using standardized ultrasonography (US). Methods The Madrid Sonography Enthesitis Index (MASEI) was applied to the US assessment of 41 HLA-B27 positive and 41 matched HLA-B27 negative patients with longstanding RA. Clinical characteristics including explorations aimed to evaluate spondyloarthrtitis and laboratory tests were also done. Results A significant degree of abnormalities in the entheses of the patients with RA were found, but the MASEI values, and each of its components including the Doppler signal, were similar in HLA-B27 positive and negative patients. An increase of the MASEI scores with age was identified. Differences in two clinical features were found: a lower prevalence of rheumatoid factor and a more common story of low back pain in the HLA-B27 positive patients than in the negative. The latter was accompanied by radiographic sacroiliitis in two HLA-B27 positive patients. No other differences were detected. Conclusion We have found that HLA-B27 positive patients with RA do not have more enthesitis as assessed with US than the patients lacking this HLA allele. However, HLA-B27 could be shaping the RA phenotype towards RF seronegativity and axial involvement.The study was supported by grants 10CSA918040PR from the Xunta de Galicia (http://www.sergas.e/MostrarContidos_N3_T01.aspx?IdPaxina=10142) and PI08/0744 of the Instituto de Salud Carlos III (http://www.isciii.es/) that are partially financed by the European Regional Development Fund of the European UnionS