Achieving High Speed CFD simulations: Optimization, Parallelization, and FPGA Acceleration for the unstructured DLR TAU Code

Today, large scale parallel simulations are fundamental tools to handle complex problems. The number of processors in current computation platforms has been recently increased and therefore it is necessary to optimize the application performance and to enhance the scalability of massively-parallel systems. In addition, new heterogeneous architectures, combining conventional processors with specific hardware, like FPGAs, to accelerate the most time consuming functions are considered as a strong alternative to boost the performance. In this paper, the performance of the DLR TAU code is analyzed and optimized. The improvement of the code efficiency is addressed through three key activities: Optimization, parallelization and hardware acceleration. At first, a profiling analysis of the most time-consuming processes of the Reynolds Averaged Navier Stokes flow solver on a three-dimensional unstructured mesh is performed. Then, a study of the code scalability with new partitioning algorithms are tested to show the most suitable partitioning algorithms for the selected applications. Finally, a feasibility study on the application of FPGAs and GPUs for the hardware acceleration of CFD simulations is presented

The Importance of the Entrepreneur’s Perception of “Success”

Purpose - In spite of the fact that the success of new ventures has been a widely studied topic in the field of entrepreneurship, no consensus on what is understood by the success of a firm can be found in the literature. Thus, the objective of this work is to discover what the entrepreneur really understands by the success of his/her business in its early years. To that end, this study clarifies the principal indicators used by entrepreneurs and analyses the relationship between how entrepreneurs understand the success of their business and the performance of that business. Design/methodology/approach – In a logit regression model, the research data are analyzed, using a sample of 98 entrepreneurs who are the heads of new firms in various sectors of activity. Findings - The study shows that there is a relationship between the way in which the entrepreneur measures how the business is doing and the performance of that business. More specifically, this research reveals that it is not the use of a greater number of indicators to measure the success that identifies the successful newly-created business from the unsuccessful, but the fact that those indicators are from different perspectives. Moreover, the results show that customer-related indicators are more effective than financial indicators to distinguish between successful and unsuccessful organizations. Research limitations/implications – Future research including qualitative interviews will help to further investigate the relationship between the entrepreneur’s perception of success and company performance. Practical implications – As a result of this research, the entrepreneurs can be conscience about how important it is the way they understand “the success” before they constitute their business. The results of this study mean a valuable knowledge to the academics that research in the entrepreneurship field, specifically to those that are focused on the success factors study. Originality/value – This research is pioneering in relating the way that the entrepreneur measures his company’s success and demonstrating its importance.Entrepreneur’s perception of success; new ventures; entrepreneurship.

Qubit authentication

Secure communication requires message authentication. In this paper we address the problem of how to authenticate quantum information sent through a quantum channel between two communicating parties with the minimum amount of resources. Specifically, our objective is to determine whether one elementary quantum message (a qubit) can be authenticated with a key of minimum length. We show that, unlike the case of classical-message quantum authentication, this is not possible.Comment: LaTeX, 8 page

El proceso de asentamiento de la migración México-Estados Unidos

Existe un proceso de reconfiguración en la migración mexicana a Estados Unidos. En la actualidad la población migrante es de 11 millones de personas y equivale a 11 por ciento del total de la población mexicana. Los centros de expulsión siguen siendo los de origen rural del bajío mexicano, pero se han sumado los de tipo urbano y particularmente del sur sureste del país, con población indígena. En cuanto al género, éste es balanceado, 56 por ciento masculino y 44 por ciento femenino. Respecto a los destinos en Estados Unidos, Texas, California, Arizona, Nuevo México e Indiana siguen siendo importantes, pero ahora los migrantes mexicanos son mayoría en 43 Estados. Los cruces tradicionales han perdido importancia y han surgido otros como Altar Sonora (Sásabe-Sasabe, Sonoyta, Agua Prieta y Cd. Juárez) cuya principal característica es la peligrosidad para la vida del migrante y la utilización de coyotes para atravesar la frontera

Gestión ambiental en micro, pequeñas y medianas empresas de hospedaje

Las micro, pequeñas y medianas empresas (MIPyMES) mantienen por su propia naturaleza una posición que generalmente las pone en desventaja frente a los grandes corporativos; en el ámbito turístico, éstas son concebidas como entidades ausentes de gestión ambiental e innovación tecnológica. Las MIPYMES hoteleras de Ixtapan de la Sal, un destino turístico tradicional ubicado en el centro de México, afrontan una reconfiguración organizacional para conseguir el mejoramiento del sector; por ello, requieren establecer estrategias que les permita ser más rentables y responsables con el ambiente. El propósito del artículo es evaluar las prácticas ambientales que realizan las MIPyMES de hospedaje, identificando limitaciones y oportunidades en torno a la capacitación, comunicación, control, monitoreo e incorporación de tecnologías. Los resultados demuestran que aun cuando son empresas con escasos recursos económicos y humanos sí llevan a cabo prácticas ambientales, no obstante, el nivel de implementación es todavía elemental y requieren de apoyo para su mejora

”Un-retiring a grandma” : Gender and Age in News Media Representation During the 2015 Spanish Municipal Elections

This master’s thesis sought to fill in two gaps: the lack of studies of gendered media representation of women politicians in Spain, and the way older women politicians are represented in the media. The 2015 Spanish municipal elections provided the perfect ground to study these two phenomena, as Manuela Carmena, who was 71 years old at the time, was elected mayor of Madrid, the capital of Spain. This paper dealt with a corpus of 183 newspaper articles in total, belonging to the two most read newspapers in Spain, El País and El Mundo, which mentioned Manuela Carmena in some capacity. Through a mixed methodology consisting of Qualitative Content Analysis and Critical Discourse Analysis, the articles were analysed through a feminist prism. Manuela Carmena’s mediated representation was shown to draw heavily from gendered tropes usually ascribed to women politicians, and a discourse of grandmotherhood underlined the way her image was constructed. However, there were some instances where Carmena was represented with more typically masculine traits, such as power or assertiveness, signifying perhaps a small improvement in the representation of women politicians

The IStReS database: Reflections on the configuration of the field of Iberian Studies

This paper discusses the objectives and methodologies of the IStReS (Iberian Studies Reference Site) project. IStReS (http://istres.letras.ulisboa.pt) is an online platform that provides tools for researchers in the field of Iberian Studies, which include a searchable bibliographic database, a “Who’s who” of relevant scholars in the field, and frequent news updates about happenings in the discipline. On the other hand, it presents an analysis of the 1,786 references that are currently included in the database in order to obtain a more detailed image of the status of Iberian Studies today. The results will allow to draw some conclusions on the current configuration of the field